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Diffstat (limited to 'lib/dns/zone.c')
| -rw-r--r-- | lib/dns/zone.c | 19485 |
1 files changed, 19485 insertions, 0 deletions
diff --git a/lib/dns/zone.c b/lib/dns/zone.c new file mode 100644 index 0000000..6d4426a --- /dev/null +++ b/lib/dns/zone.c @@ -0,0 +1,19485 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/*! \file */ + +#include <config.h> +#include <errno.h> +#include <stdbool.h> + +#include <isc/file.h> +#include <isc/hex.h> +#include <isc/mutex.h> +#include <isc/pool.h> +#include <isc/print.h> +#include <isc/random.h> +#include <isc/ratelimiter.h> +#include <isc/refcount.h> +#include <isc/rwlock.h> +#include <isc/serial.h> +#include <isc/stats.h> +#include <isc/stdtime.h> +#include <isc/strerror.h> +#include <isc/string.h> +#include <isc/taskpool.h> +#include <isc/thread.h> +#include <isc/timer.h> +#include <isc/util.h> + +#include <dns/acache.h> +#include <dns/acl.h> +#include <dns/adb.h> +#include <dns/callbacks.h> +#include <dns/catz.h> +#include <dns/db.h> +#include <dns/dbiterator.h> +#include <dns/dlz.h> +#include <dns/dnssec.h> +#include <dns/events.h> +#include <dns/journal.h> +#include <dns/keydata.h> +#include <dns/keytable.h> +#include <dns/keyvalues.h> +#include <dns/log.h> +#include <dns/master.h> +#include <dns/masterdump.h> +#include <dns/message.h> +#include <dns/name.h> +#include <dns/nsec.h> +#include <dns/nsec3.h> +#include <dns/peer.h> +#include <dns/private.h> +#include <dns/rcode.h> +#include <dns/rdata.h> +#include <dns/rdataclass.h> +#include <dns/rdatalist.h> +#include <dns/rdataset.h> +#include <dns/rdatasetiter.h> +#include <dns/rdatastruct.h> +#include <dns/rdatatype.h> +#include <dns/request.h> +#include <dns/resolver.h> +#include <dns/result.h> +#include <dns/rriterator.h> +#include <dns/soa.h> +#include <dns/ssu.h> +#include <dns/stats.h> +#include <dns/time.h> +#include <dns/tsig.h> +#include <dns/update.h> +#include <dns/xfrin.h> +#include <dns/zone.h> +#include <dns/zt.h> + +#include <dst/dst.h> + +#include "zone_p.h" + +#define ZONE_MAGIC ISC_MAGIC('Z', 'O', 'N', 'E') +#define DNS_ZONE_VALID(zone) ISC_MAGIC_VALID(zone, ZONE_MAGIC) + +#define NOTIFY_MAGIC ISC_MAGIC('N', 't', 'f', 'y') +#define DNS_NOTIFY_VALID(notify) ISC_MAGIC_VALID(notify, NOTIFY_MAGIC) + +#define STUB_MAGIC ISC_MAGIC('S', 't', 'u', 'b') +#define DNS_STUB_VALID(stub) ISC_MAGIC_VALID(stub, STUB_MAGIC) + +#define ZONEMGR_MAGIC ISC_MAGIC('Z', 'm', 'g', 'r') +#define DNS_ZONEMGR_VALID(stub) ISC_MAGIC_VALID(stub, ZONEMGR_MAGIC) + +#define LOAD_MAGIC ISC_MAGIC('L', 'o', 'a', 'd') +#define DNS_LOAD_VALID(load) ISC_MAGIC_VALID(load, LOAD_MAGIC) + +#define FORWARD_MAGIC ISC_MAGIC('F', 'o', 'r', 'w') +#define DNS_FORWARD_VALID(load) ISC_MAGIC_VALID(load, FORWARD_MAGIC) + +#define IO_MAGIC ISC_MAGIC('Z', 'm', 'I', 'O') +#define DNS_IO_VALID(load) ISC_MAGIC_VALID(load, IO_MAGIC) + +/*% + * Ensure 'a' is at least 'min' but not more than 'max'. + */ +#define RANGE(a, min, max) \ + (((a) < (min)) ? (min) : ((a) < (max) ? (a) : (max))) + +#define NSEC3REMOVE(x) (((x) & DNS_NSEC3FLAG_REMOVE) != 0) + +/*% + * Key flags + */ +#define REVOKE(x) ((dst_key_flags(x) & DNS_KEYFLAG_REVOKE) != 0) +#define KSK(x) ((dst_key_flags(x) & DNS_KEYFLAG_KSK) != 0) +#define ALG(x) dst_key_alg(x) + +/* + * Default values. + */ +#define DNS_DEFAULT_IDLEIN 3600 /*%< 1 hour */ +#define DNS_DEFAULT_IDLEOUT 3600 /*%< 1 hour */ +#define MAX_XFER_TIME (2*3600) /*%< Documented default is 2 hours */ +#define RESIGN_DELAY 3600 /*%< 1 hour */ + +#ifndef DNS_MAX_EXPIRE +#define DNS_MAX_EXPIRE 14515200 /*%< 24 weeks */ +#endif + +#ifndef DNS_DUMP_DELAY +#define DNS_DUMP_DELAY 900 /*%< 15 minutes */ +#endif + +typedef struct dns_notify dns_notify_t; +typedef struct dns_stub dns_stub_t; +typedef struct dns_load dns_load_t; +typedef struct dns_forward dns_forward_t; +typedef ISC_LIST(dns_forward_t) dns_forwardlist_t; +typedef struct dns_io dns_io_t; +typedef ISC_LIST(dns_io_t) dns_iolist_t; +typedef struct dns_signing dns_signing_t; +typedef ISC_LIST(dns_signing_t) dns_signinglist_t; +typedef struct dns_nsec3chain dns_nsec3chain_t; +typedef ISC_LIST(dns_nsec3chain_t) dns_nsec3chainlist_t; +typedef struct dns_keyfetch dns_keyfetch_t; +typedef struct dns_asyncload dns_asyncload_t; +typedef struct dns_include dns_include_t; + +#define DNS_ZONE_CHECKLOCK +#ifdef DNS_ZONE_CHECKLOCK +#define LOCK_ZONE(z) \ + do { LOCK(&(z)->lock); \ + INSIST((z)->locked == false); \ + (z)->locked = true; \ + } while (0) +#define UNLOCK_ZONE(z) \ + do { (z)->locked = false; UNLOCK(&(z)->lock); } while (0) +#define LOCKED_ZONE(z) ((z)->locked) +#define TRYLOCK_ZONE(result, z) \ + do { \ + result = isc_mutex_trylock(&(z)->lock); \ + if (result == ISC_R_SUCCESS) { \ + INSIST((z)->locked == false); \ + (z)->locked = true; \ + } \ + } while (0) +#else +#define LOCK_ZONE(z) LOCK(&(z)->lock) +#define UNLOCK_ZONE(z) UNLOCK(&(z)->lock) +#define LOCKED_ZONE(z) true +#define TRYLOCK_ZONE(result, z) \ + do { result = isc_mutex_trylock(&(z)->lock); } while (0) +#endif + +#ifdef ISC_RWLOCK_USEATOMIC +#define ZONEDB_INITLOCK(l) isc_rwlock_init((l), 0, 0) +#define ZONEDB_DESTROYLOCK(l) isc_rwlock_destroy(l) +#define ZONEDB_LOCK(l, t) RWLOCK((l), (t)) +#define ZONEDB_UNLOCK(l, t) RWUNLOCK((l), (t)) +#else +#define ZONEDB_INITLOCK(l) isc_mutex_init(l) +#define ZONEDB_DESTROYLOCK(l) DESTROYLOCK(l) +#define ZONEDB_LOCK(l, t) LOCK(l) +#define ZONEDB_UNLOCK(l, t) UNLOCK(l) +#endif + +#ifdef ENABLE_AFL +extern bool dns_fuzzing_resolver; +#endif + +struct dns_zone { + /* Unlocked */ + unsigned int magic; + isc_mutex_t lock; +#ifdef DNS_ZONE_CHECKLOCK + bool locked; +#endif + isc_mem_t *mctx; + isc_refcount_t erefs; + +#ifdef ISC_RWLOCK_USEATOMIC + isc_rwlock_t dblock; +#else + isc_mutex_t dblock; +#endif + dns_db_t *db; /* Locked by dblock */ + + /* Locked */ + dns_zonemgr_t *zmgr; + ISC_LINK(dns_zone_t) link; /* Used by zmgr. */ + isc_timer_t *timer; + unsigned int irefs; + dns_name_t origin; + char *masterfile; + ISC_LIST(dns_include_t) includes; /* Include files */ + ISC_LIST(dns_include_t) newincludes; /* Loading */ + unsigned int nincludes; + dns_masterformat_t masterformat; + const dns_master_style_t *masterstyle; + char *journal; + int32_t journalsize; + dns_rdataclass_t rdclass; + dns_zonetype_t type; + unsigned int flags; + unsigned int options; + unsigned int options2; + unsigned int db_argc; + char **db_argv; + isc_time_t expiretime; + isc_time_t refreshtime; + isc_time_t dumptime; + isc_time_t loadtime; + isc_time_t notifytime; + isc_time_t resigntime; + isc_time_t keywarntime; + isc_time_t signingtime; + isc_time_t nsec3chaintime; + isc_time_t refreshkeytime; + uint32_t refreshkeyinterval; + uint32_t refreshkeycount; + uint32_t refresh; + uint32_t retry; + uint32_t expire; + uint32_t minimum; + isc_stdtime_t key_expiry; + isc_stdtime_t log_key_expired_timer; + char *keydirectory; + + uint32_t maxrefresh; + uint32_t minrefresh; + uint32_t maxretry; + uint32_t minretry; + + uint32_t maxrecords; + + isc_sockaddr_t *masters; + isc_dscp_t *masterdscps; + dns_name_t **masterkeynames; + bool *mastersok; + unsigned int masterscnt; + unsigned int curmaster; + isc_sockaddr_t masteraddr; + dns_notifytype_t notifytype; + isc_sockaddr_t *notify; + dns_name_t **notifykeynames; + isc_dscp_t *notifydscp; + unsigned int notifycnt; + isc_sockaddr_t notifyfrom; + isc_task_t *task; + isc_task_t *loadtask; + isc_sockaddr_t notifysrc4; + isc_sockaddr_t notifysrc6; + isc_sockaddr_t xfrsource4; + isc_sockaddr_t xfrsource6; + isc_sockaddr_t altxfrsource4; + isc_sockaddr_t altxfrsource6; + isc_sockaddr_t sourceaddr; + isc_dscp_t notifysrc4dscp; + isc_dscp_t notifysrc6dscp; + isc_dscp_t xfrsource4dscp; + isc_dscp_t xfrsource6dscp; + isc_dscp_t altxfrsource4dscp; + isc_dscp_t altxfrsource6dscp; + dns_xfrin_ctx_t *xfr; /* task locked */ + dns_tsigkey_t *tsigkey; /* key used for xfr */ + /* Access Control Lists */ + dns_acl_t *update_acl; + dns_acl_t *forward_acl; + dns_acl_t *notify_acl; + dns_acl_t *query_acl; + dns_acl_t *queryon_acl; + dns_acl_t *xfr_acl; + bool update_disabled; + bool zero_no_soa_ttl; + dns_severity_t check_names; + ISC_LIST(dns_notify_t) notifies; + dns_request_t *request; + dns_loadctx_t *lctx; + dns_io_t *readio; + dns_dumpctx_t *dctx; + dns_io_t *writeio; + uint32_t maxxfrin; + uint32_t maxxfrout; + uint32_t idlein; + uint32_t idleout; + isc_event_t ctlevent; + dns_ssutable_t *ssutable; + uint32_t sigvalidityinterval; + uint32_t sigresigninginterval; + dns_view_t *view; + dns_view_t *prev_view; + dns_acache_t *acache; + dns_checkmxfunc_t checkmx; + dns_checksrvfunc_t checksrv; + dns_checknsfunc_t checkns; + /*% + * Zones in certain states such as "waiting for zone transfer" + * or "zone transfer in progress" are kept on per-state linked lists + * in the zone manager using the 'statelink' field. The 'statelist' + * field points at the list the zone is currently on. It the zone + * is not on any such list, statelist is NULL. + */ + ISC_LINK(dns_zone_t) statelink; + dns_zonelist_t *statelist; + /*% + * Statistics counters about zone management. + */ + isc_stats_t *stats; + /*% + * Optional per-zone statistics counters. Counted outside of this + * module. + */ + dns_zonestat_level_t statlevel; + bool requeststats_on; + isc_stats_t *requeststats; + dns_stats_t *rcvquerystats; + uint32_t notifydelay; + dns_isselffunc_t isself; + void *isselfarg; + + char * strnamerd; + char * strname; + char * strrdclass; + char * strviewname; + + /*% + * Serial number for deferred journal compaction. + */ + uint32_t compact_serial; + /*% + * Keys that are signing the zone for the first time. + */ + dns_signinglist_t signing; + dns_nsec3chainlist_t nsec3chain; + /*% + * List of outstanding NSEC3PARAM change requests. + */ + isc_eventlist_t setnsec3param_queue; + /*% + * Signing / re-signing quantum stopping parameters. + */ + uint32_t signatures; + uint32_t nodes; + dns_rdatatype_t privatetype; + + /*% + * Autosigning/key-maintenance options + */ + uint32_t keyopts; + + /*% + * True if added by "rndc addzone" + */ + bool added; + + /*% + * True if added by automatically by named. + */ + bool automatic; + + /*% + * response policy data to be relayed to the database + */ + dns_rpz_zones_t *rpzs; + dns_rpz_num_t rpz_num; + + /*% + * catalog zone data + */ + dns_catz_zones_t *catzs; + + /*% + * parent catalog zone + */ + dns_catz_zone_t *parentcatz; + + /*% + * Serial number update method. + */ + dns_updatemethod_t updatemethod; + + /*% + * whether ixfr is requested + */ + bool requestixfr; + + /*% + * whether EDNS EXPIRE is requested + */ + bool requestexpire; + + /*% + * Outstanding forwarded UPDATE requests. + */ + dns_forwardlist_t forwards; + + dns_zone_t *raw; + dns_zone_t *secure; + + bool sourceserialset; + uint32_t sourceserial; + + /*% + * maximum zone ttl + */ + dns_ttl_t maxttl; + + /* + * Inline zone signing state. + */ + dns_diff_t rss_diff; + isc_eventlist_t rss_events; + dns_dbversion_t *rss_newver; + dns_dbversion_t *rss_oldver; + dns_db_t *rss_db; + dns_zone_t *rss_raw; + isc_event_t *rss_event; + dns_update_state_t *rss_state; +}; + +#define zonediff_init(z, d) \ + do { \ + dns__zonediff_t *_z = (z); \ + (_z)->diff = (d); \ + (_z)->offline = false; \ + } while (0) + +#define DNS_ZONE_FLAG(z,f) ((z)->flags & (f)) +#define DNS_ZONE_SETFLAG(z,f) do { \ + INSIST(LOCKED_ZONE(z)); \ + (z)->flags |= (f); \ + } while (0) +#define DNS_ZONE_CLRFLAG(z,f) do { \ + INSIST(LOCKED_ZONE(z)); \ + (z)->flags &= ~(f); \ + } while (0) + /* XXX MPA these may need to go back into zone.h */ +#define DNS_ZONEFLG_REFRESH 0x00000001U /*%< refresh check in progress */ +#define DNS_ZONEFLG_NEEDDUMP 0x00000002U /*%< zone need consolidation */ +#define DNS_ZONEFLG_USEVC 0x00000004U /*%< use tcp for refresh query */ +#define DNS_ZONEFLG_DUMPING 0x00000008U /*%< a dump is in progress */ +#define DNS_ZONEFLG_HASINCLUDE 0x00000010U /*%< $INCLUDE in zone file */ +#define DNS_ZONEFLG_LOADED 0x00000020U /*%< database has loaded */ +#define DNS_ZONEFLG_EXITING 0x00000040U /*%< zone is being destroyed */ +#define DNS_ZONEFLG_EXPIRED 0x00000080U /*%< zone has expired */ +#define DNS_ZONEFLG_NEEDREFRESH 0x00000100U /*%< refresh check needed */ +#define DNS_ZONEFLG_UPTODATE 0x00000200U /*%< zone contents are + * uptodate */ +#define DNS_ZONEFLG_NEEDNOTIFY 0x00000400U /*%< need to send out notify + * messages */ +#define DNS_ZONEFLG_DIFFONRELOAD 0x00000800U /*%< generate a journal diff on + * reload */ +#define DNS_ZONEFLG_NOMASTERS 0x00001000U /*%< an attempt to refresh a + * zone with no masters + * occurred */ +#define DNS_ZONEFLG_LOADING 0x00002000U /*%< load from disk in progress*/ +#define DNS_ZONEFLG_HAVETIMERS 0x00004000U /*%< timer values have been set + * from SOA (if not set, we + * are still using + * default timer values) */ +#define DNS_ZONEFLG_FORCEXFER 0x00008000U /*%< Force a zone xfer */ +#define DNS_ZONEFLG_NOREFRESH 0x00010000U +#define DNS_ZONEFLG_DIALNOTIFY 0x00020000U +#define DNS_ZONEFLG_DIALREFRESH 0x00040000U +#define DNS_ZONEFLG_SHUTDOWN 0x00080000U +#define DNS_ZONEFLAG_NOIXFR 0x00100000U /*%< IXFR failed, force AXFR */ +#define DNS_ZONEFLG_FLUSH 0x00200000U +#define DNS_ZONEFLG_NOEDNS 0x00400000U +#define DNS_ZONEFLG_USEALTXFRSRC 0x00800000U +#define DNS_ZONEFLG_SOABEFOREAXFR 0x01000000U +#define DNS_ZONEFLG_NEEDCOMPACT 0x02000000U +#define DNS_ZONEFLG_REFRESHING 0x04000000U /*%< Refreshing keydata */ +#define DNS_ZONEFLG_THAW 0x08000000U +#define DNS_ZONEFLG_LOADPENDING 0x10000000U /*%< Loading scheduled */ +#define DNS_ZONEFLG_NODELAY 0x20000000U +#define DNS_ZONEFLG_SENDSECURE 0x40000000U +#define DNS_ZONEFLG_NEEDSTARTUPNOTIFY 0x80000000U /*%< need to send out notify + * due to the zone just + * being loaded for the + * first time. */ + +#define DNS_ZONE_OPTION(z,o) (((z)->options & (o)) != 0) +#define DNS_ZONE_OPTION2(z,o) (((z)->options2 & (o)) != 0) +#define DNS_ZONEKEY_OPTION(z,o) (((z)->keyopts & (o)) != 0) + +/* Flags for zone_load() */ +#define DNS_ZONELOADFLAG_NOSTAT 0x00000001U /* Do not stat() master files */ +#define DNS_ZONELOADFLAG_THAW 0x00000002U /* Thaw the zone on successful + load. */ + +#define UNREACH_CHACHE_SIZE 10U +#define UNREACH_HOLD_TIME 600 /* 10 minutes */ + +#define CHECK(op) \ + do { result = (op); \ + if (result != ISC_R_SUCCESS) goto failure; \ + } while (0) + +struct dns_unreachable { + isc_sockaddr_t remote; + isc_sockaddr_t local; + uint32_t expire; + uint32_t last; + uint32_t count; +}; + +struct dns_zonemgr { + unsigned int magic; + isc_mem_t * mctx; + int refs; /* Locked by rwlock */ + isc_taskmgr_t * taskmgr; + isc_timermgr_t * timermgr; + isc_socketmgr_t * socketmgr; + isc_taskpool_t * zonetasks; + isc_taskpool_t * loadtasks; + isc_task_t * task; + isc_pool_t * mctxpool; + isc_ratelimiter_t * notifyrl; + isc_ratelimiter_t * refreshrl; + isc_ratelimiter_t * startupnotifyrl; + isc_ratelimiter_t * startuprefreshrl; + isc_rwlock_t rwlock; + isc_mutex_t iolock; + isc_rwlock_t urlock; + + /* Locked by rwlock. */ + dns_zonelist_t zones; + dns_zonelist_t waiting_for_xfrin; + dns_zonelist_t xfrin_in_progress; + + /* Configuration data. */ + uint32_t transfersin; + uint32_t transfersperns; + unsigned int notifyrate; + unsigned int startupnotifyrate; + unsigned int serialqueryrate; + unsigned int startupserialqueryrate; + + /* Locked by iolock */ + uint32_t iolimit; + uint32_t ioactive; + dns_iolist_t high; + dns_iolist_t low; + + /* Locked by urlock. */ + /* LRU cache */ + struct dns_unreachable unreachable[UNREACH_CHACHE_SIZE]; +}; + +/*% + * Hold notify state. + */ +struct dns_notify { + unsigned int magic; + unsigned int flags; + isc_mem_t *mctx; + dns_zone_t *zone; + dns_adbfind_t *find; + dns_request_t *request; + dns_name_t ns; + isc_sockaddr_t dst; + dns_tsigkey_t *key; + isc_dscp_t dscp; + ISC_LINK(dns_notify_t) link; + isc_event_t *event; +}; + +#define DNS_NOTIFY_NOSOA 0x0001U +#define DNS_NOTIFY_STARTUP 0x0002U + +/*% + * dns_stub holds state while performing a 'stub' transfer. + * 'db' is the zone's 'db' or a new one if this is the initial + * transfer. + */ + +struct dns_stub { + unsigned int magic; + isc_mem_t *mctx; + dns_zone_t *zone; + dns_db_t *db; + dns_dbversion_t *version; +}; + +/*% + * Hold load state. + */ +struct dns_load { + unsigned int magic; + isc_mem_t *mctx; + dns_zone_t *zone; + dns_db_t *db; + isc_time_t loadtime; + dns_rdatacallbacks_t callbacks; +}; + +/*% + * Hold forward state. + */ +struct dns_forward { + unsigned int magic; + isc_mem_t *mctx; + dns_zone_t *zone; + isc_buffer_t *msgbuf; + dns_request_t *request; + uint32_t which; + isc_sockaddr_t addr; + dns_updatecallback_t callback; + void *callback_arg; + unsigned int options; + ISC_LINK(dns_forward_t) link; +}; + +/*% + * Hold IO request state. + */ +struct dns_io { + unsigned int magic; + dns_zonemgr_t *zmgr; + bool high; + isc_task_t *task; + ISC_LINK(dns_io_t) link; + isc_event_t *event; +}; + +/*% + * Hold state for when we are signing a zone with a new + * DNSKEY as result of an update. + */ +struct dns_signing { + unsigned int magic; + dns_db_t *db; + dns_dbiterator_t *dbiterator; + dns_secalg_t algorithm; + uint16_t keyid; + bool deleteit; + bool done; + ISC_LINK(dns_signing_t) link; +}; + +struct dns_nsec3chain { + unsigned int magic; + dns_db_t *db; + dns_dbiterator_t *dbiterator; + dns_rdata_nsec3param_t nsec3param; + unsigned char salt[255]; + bool done; + bool seen_nsec; + bool delete_nsec; + bool save_delete_nsec; + ISC_LINK(dns_nsec3chain_t) link; +}; +/*%< + * 'dbiterator' contains a iterator for the database. If we are creating + * a NSEC3 chain only the non-NSEC3 nodes will be iterated. If we are + * removing a NSEC3 chain then both NSEC3 and non-NSEC3 nodes will be + * iterated. + * + * 'nsec3param' contains the parameters of the NSEC3 chain being created + * or removed. + * + * 'salt' is buffer space and is referenced via 'nsec3param.salt'. + * + * 'seen_nsec' will be set to true if, while iterating the zone to create a + * NSEC3 chain, a NSEC record is seen. + * + * 'delete_nsec' will be set to true if, at the completion of the creation + * of a NSEC3 chain, 'seen_nsec' is true. If 'delete_nsec' is true then we + * are in the process of deleting the NSEC chain. + * + * 'save_delete_nsec' is used to store the initial state of 'delete_nsec' + * so it can be recovered in the event of a error. + */ + +struct dns_keyfetch { + dns_fixedname_t name; + dns_rdataset_t keydataset; + dns_rdataset_t dnskeyset; + dns_rdataset_t dnskeysigset; + dns_zone_t *zone; + dns_db_t *db; + dns_fetch_t *fetch; +}; + +/*% + * Hold state for an asynchronous load + */ +struct dns_asyncload { + dns_zone_t *zone; + dns_zt_zoneloaded_t loaded; + void *loaded_arg; + bool newonly; +}; + +/*% + * Reference to an include file encountered during loading + */ +struct dns_include { + char *name; + isc_time_t filetime; + ISC_LINK(dns_include_t) link; +}; + +/* + * These can be overridden by the -T mkeytimers option on the command + * line, so that we can test with shorter periods than specified in + * RFC 5011. + */ +#define HOUR 3600 +#define DAY (24*HOUR) +#define MONTH (30*DAY) +LIBDNS_EXTERNAL_DATA unsigned int dns_zone_mkey_hour = HOUR; +LIBDNS_EXTERNAL_DATA unsigned int dns_zone_mkey_day = DAY; +LIBDNS_EXTERNAL_DATA unsigned int dns_zone_mkey_month = MONTH; + +#define SEND_BUFFER_SIZE 2048 + +static void zone_settimer(dns_zone_t *, isc_time_t *); +static void cancel_refresh(dns_zone_t *); +static void zone_debuglog(dns_zone_t *zone, const char *, int debuglevel, + const char *msg, ...) ISC_FORMAT_PRINTF(4, 5); +static void notify_log(dns_zone_t *zone, int level, const char *fmt, ...) + ISC_FORMAT_PRINTF(3, 4); +static void queue_xfrin(dns_zone_t *zone); +static isc_result_t update_one_rr(dns_db_t *db, dns_dbversion_t *ver, + dns_diff_t *diff, dns_diffop_t op, + dns_name_t *name, dns_ttl_t ttl, + dns_rdata_t *rdata); +static void zone_unload(dns_zone_t *zone); +static void zone_expire(dns_zone_t *zone); +static void zone_iattach(dns_zone_t *source, dns_zone_t **target); +static void zone_idetach(dns_zone_t **zonep); +static isc_result_t zone_replacedb(dns_zone_t *zone, dns_db_t *db, + bool dump); +static inline void zone_attachdb(dns_zone_t *zone, dns_db_t *db); +static inline void zone_detachdb(dns_zone_t *zone); +static isc_result_t default_journal(dns_zone_t *zone); +static void zone_xfrdone(dns_zone_t *zone, isc_result_t result); +static isc_result_t zone_postload(dns_zone_t *zone, dns_db_t *db, + isc_time_t loadtime, isc_result_t result); +static void zone_needdump(dns_zone_t *zone, unsigned int delay); +static void zone_shutdown(isc_task_t *, isc_event_t *); +static void zone_loaddone(void *arg, isc_result_t result); +static isc_result_t zone_startload(dns_db_t *db, dns_zone_t *zone, + isc_time_t loadtime); +static void zone_namerd_tostr(dns_zone_t *zone, char *buf, size_t length); +static void zone_name_tostr(dns_zone_t *zone, char *buf, size_t length); +static void zone_rdclass_tostr(dns_zone_t *zone, char *buf, size_t length); +static void zone_viewname_tostr(dns_zone_t *zone, char *buf, size_t length); +static isc_result_t zone_send_secureserial(dns_zone_t *zone, + uint32_t serial); + +#if 0 +/* ondestroy example */ +static void dns_zonemgr_dbdestroyed(isc_task_t *task, isc_event_t *event); +#endif + +static void refresh_callback(isc_task_t *, isc_event_t *); +static void stub_callback(isc_task_t *, isc_event_t *); +static void queue_soa_query(dns_zone_t *zone); +static void soa_query(isc_task_t *, isc_event_t *); +static void ns_query(dns_zone_t *zone, dns_rdataset_t *soardataset, + dns_stub_t *stub); +static int message_count(dns_message_t *msg, dns_section_t section, + dns_rdatatype_t type); +static void notify_cancel(dns_zone_t *zone); +static void notify_find_address(dns_notify_t *notify); +static void notify_send(dns_notify_t *notify); +static isc_result_t notify_createmessage(dns_zone_t *zone, + unsigned int flags, + dns_message_t **messagep); +static void notify_done(isc_task_t *task, isc_event_t *event); +static void notify_send_toaddr(isc_task_t *task, isc_event_t *event); +static isc_result_t zone_dump(dns_zone_t *, bool); +static void got_transfer_quota(isc_task_t *task, isc_event_t *event); +static isc_result_t zmgr_start_xfrin_ifquota(dns_zonemgr_t *zmgr, + dns_zone_t *zone); +static void zmgr_resume_xfrs(dns_zonemgr_t *zmgr, bool multi); +static void zonemgr_free(dns_zonemgr_t *zmgr); +static isc_result_t zonemgr_getio(dns_zonemgr_t *zmgr, bool high, + isc_task_t *task, isc_taskaction_t action, + void *arg, dns_io_t **iop); +static void zonemgr_putio(dns_io_t **iop); +static void zonemgr_cancelio(dns_io_t *io); + +static isc_result_t +zone_get_from_db(dns_zone_t *zone, dns_db_t *db, unsigned int *nscount, + unsigned int *soacount, uint32_t *serial, + uint32_t *refresh, uint32_t *retry, + uint32_t *expire, uint32_t *minimum, + unsigned int *errors); + +static void zone_freedbargs(dns_zone_t *zone); +static void forward_callback(isc_task_t *task, isc_event_t *event); +static void zone_saveunique(dns_zone_t *zone, const char *path, + const char *templat); +static void zone_maintenance(dns_zone_t *zone); +static void zone_notify(dns_zone_t *zone, isc_time_t *now); +static void dump_done(void *arg, isc_result_t result); +static isc_result_t zone_signwithkey(dns_zone_t *zone, dns_secalg_t algorithm, + uint16_t keyid, + bool deleteit); +static isc_result_t delete_nsec(dns_db_t *db, dns_dbversion_t *ver, + dns_dbnode_t *node, dns_name_t *name, + dns_diff_t *diff); +static void zone_rekey(dns_zone_t *zone); +static isc_result_t zone_send_securedb(dns_zone_t *zone, dns_db_t *db); +static void setrl(isc_ratelimiter_t *rl, unsigned int *rate, + unsigned int value); + +#define ENTER zone_debuglog(zone, me, 1, "enter") + +static const unsigned int dbargc_default = 1; +static const char *dbargv_default[] = { "rbt" }; + +#define DNS_ZONE_JITTER_ADD(a, b, c) \ + do { \ + isc_interval_t _i; \ + uint32_t _j; \ + _j = isc_random_jitter((b), (b)/4); \ + isc_interval_set(&_i, _j, 0); \ + if (isc_time_add((a), &_i, (c)) != ISC_R_SUCCESS) { \ + dns_zone_log(zone, ISC_LOG_WARNING, \ + "epoch approaching: upgrade required: " \ + "now + %s failed", #b); \ + isc_interval_set(&_i, _j/2, 0); \ + (void)isc_time_add((a), &_i, (c)); \ + } \ + } while (0) + +#define DNS_ZONE_TIME_ADD(a, b, c) \ + do { \ + isc_interval_t _i; \ + isc_interval_set(&_i, (b), 0); \ + if (isc_time_add((a), &_i, (c)) != ISC_R_SUCCESS) { \ + dns_zone_log(zone, ISC_LOG_WARNING, \ + "epoch approaching: upgrade required: " \ + "now + %s failed", #b); \ + isc_interval_set(&_i, (b)/2, 0); \ + (void)isc_time_add((a), &_i, (c)); \ + } \ + } while (0) + +typedef struct nsec3param nsec3param_t; +struct nsec3param { + unsigned char data[DNS_NSEC3PARAM_BUFFERSIZE + 1]; + unsigned int length; + bool nsec; + bool replace; + ISC_LINK(nsec3param_t) link; +}; +typedef ISC_LIST(nsec3param_t) nsec3paramlist_t; +struct np3event { + isc_event_t event; + nsec3param_t params; +}; + +struct ssevent { + isc_event_t event; + uint32_t serial; +}; + +/*% + * Increment resolver-related statistics counters. Zone must be locked. + */ +static inline void +inc_stats(dns_zone_t *zone, isc_statscounter_t counter) { + if (zone->stats != NULL) + isc_stats_increment(zone->stats, counter); +} + +/*** + *** Public functions. + ***/ + +isc_result_t +dns_zone_create(dns_zone_t **zonep, isc_mem_t *mctx) { + isc_result_t result; + dns_zone_t *zone; + isc_time_t now; + + REQUIRE(zonep != NULL && *zonep == NULL); + REQUIRE(mctx != NULL); + + TIME_NOW(&now); + zone = isc_mem_get(mctx, sizeof(*zone)); + if (zone == NULL) { + return (ISC_R_NOMEMORY); + } + + zone->mctx = NULL; + isc_mem_attach(mctx, &zone->mctx); + + result = isc_mutex_init(&zone->lock); + if (result != ISC_R_SUCCESS) { + goto free_zone; + } + + result = ZONEDB_INITLOCK(&zone->dblock); + if (result != ISC_R_SUCCESS) { + goto free_mutex; + } + + /* XXX MPA check that all elements are initialised */ +#ifdef DNS_ZONE_CHECKLOCK + zone->locked = false; +#endif + zone->db = NULL; + zone->zmgr = NULL; + ISC_LINK_INIT(zone, link); + result = isc_refcount_init(&zone->erefs, 1); /* Implicit attach. */ + if (result != ISC_R_SUCCESS) { + goto free_dblock; + } + zone->irefs = 0; + dns_name_init(&zone->origin, NULL); + zone->strnamerd = NULL; + zone->strname = NULL; + zone->strrdclass = NULL; + zone->strviewname = NULL; + zone->masterfile = NULL; + ISC_LIST_INIT(zone->includes); + ISC_LIST_INIT(zone->newincludes); + zone->nincludes = 0; + zone->masterformat = dns_masterformat_none; + zone->masterstyle = NULL; + zone->keydirectory = NULL; + zone->journalsize = -1; + zone->journal = NULL; + zone->rdclass = dns_rdataclass_none; + zone->type = dns_zone_none; + zone->flags = 0; + zone->options = 0; + zone->options2 = 0; + zone->keyopts = 0; + zone->db_argc = 0; + zone->db_argv = NULL; + isc_time_settoepoch(&zone->expiretime); + isc_time_settoepoch(&zone->refreshtime); + isc_time_settoepoch(&zone->dumptime); + isc_time_settoepoch(&zone->loadtime); + zone->notifytime = now; + isc_time_settoepoch(&zone->resigntime); + isc_time_settoepoch(&zone->keywarntime); + isc_time_settoepoch(&zone->signingtime); + isc_time_settoepoch(&zone->nsec3chaintime); + isc_time_settoepoch(&zone->refreshkeytime); + zone->refreshkeyinterval = 0; + zone->refreshkeycount = 0; + zone->refresh = DNS_ZONE_DEFAULTREFRESH; + zone->retry = DNS_ZONE_DEFAULTRETRY; + zone->expire = 0; + zone->minimum = 0; + zone->maxrefresh = DNS_ZONE_MAXREFRESH; + zone->minrefresh = DNS_ZONE_MINREFRESH; + zone->maxretry = DNS_ZONE_MAXRETRY; + zone->minretry = DNS_ZONE_MINRETRY; + zone->masters = NULL; + zone->masterdscps = NULL; + zone->masterkeynames = NULL; + zone->mastersok = NULL; + zone->masterscnt = 0; + zone->curmaster = 0; + zone->maxttl = 0; + zone->notify = NULL; + zone->notifykeynames = NULL; + zone->notifydscp = NULL; + zone->notifytype = dns_notifytype_yes; + zone->notifycnt = 0; + zone->task = NULL; + zone->loadtask = NULL; + zone->update_acl = NULL; + zone->forward_acl = NULL; + zone->notify_acl = NULL; + zone->query_acl = NULL; + zone->queryon_acl = NULL; + zone->xfr_acl = NULL; + zone->update_disabled = false; + zone->zero_no_soa_ttl = true; + zone->check_names = dns_severity_ignore; + zone->request = NULL; + zone->lctx = NULL; + zone->readio = NULL; + zone->dctx = NULL; + zone->writeio = NULL; + zone->timer = NULL; + zone->idlein = DNS_DEFAULT_IDLEIN; + zone->idleout = DNS_DEFAULT_IDLEOUT; + zone->log_key_expired_timer = 0; + ISC_LIST_INIT(zone->notifies); + isc_sockaddr_any(&zone->notifysrc4); + isc_sockaddr_any6(&zone->notifysrc6); + isc_sockaddr_any(&zone->xfrsource4); + isc_sockaddr_any6(&zone->xfrsource6); + isc_sockaddr_any(&zone->altxfrsource4); + isc_sockaddr_any6(&zone->altxfrsource6); + zone->notifysrc4dscp = -1; + zone->notifysrc6dscp = -1; + zone->xfrsource4dscp = -1; + zone->xfrsource6dscp = -1; + zone->altxfrsource4dscp = -1; + zone->altxfrsource6dscp = -1; + zone->xfr = NULL; + zone->tsigkey = NULL; + zone->maxxfrin = MAX_XFER_TIME; + zone->maxxfrout = MAX_XFER_TIME; + zone->ssutable = NULL; + zone->sigvalidityinterval = 30 * 24 * 3600; + zone->sigresigninginterval = 7 * 24 * 3600; + zone->view = NULL; + zone->prev_view = NULL; + zone->acache = NULL; + zone->checkmx = NULL; + zone->checksrv = NULL; + zone->checkns = NULL; + ISC_LINK_INIT(zone, statelink); + zone->statelist = NULL; + zone->stats = NULL; + zone->requeststats_on = false; + zone->statlevel = dns_zonestat_none; + zone->requeststats = NULL; + zone->rcvquerystats = NULL; + zone->notifydelay = 5; + zone->isself = NULL; + zone->isselfarg = NULL; + ISC_LIST_INIT(zone->signing); + ISC_LIST_INIT(zone->nsec3chain); + ISC_LIST_INIT(zone->setnsec3param_queue); + zone->signatures = 10; + zone->nodes = 100; + zone->privatetype = (dns_rdatatype_t)0xffffU; + zone->added = false; + zone->automatic = false; + zone->rpzs = NULL; + zone->rpz_num = DNS_RPZ_INVALID_NUM; + + zone->catzs = NULL; + zone->parentcatz = NULL; + + ISC_LIST_INIT(zone->forwards); + zone->raw = NULL; + zone->secure = NULL; + zone->sourceserial = 0; + zone->sourceserialset = false; + zone->requestixfr = true; + zone->requestexpire = true; + ISC_LIST_INIT(zone->rss_events); + zone->rss_db = NULL; + zone->rss_raw = NULL; + zone->rss_newver = NULL; + zone->rss_oldver = NULL; + zone->rss_event = NULL; + zone->rss_state = NULL; + zone->updatemethod = dns_updatemethod_increment; + zone->maxrecords = 0U; + + zone->magic = ZONE_MAGIC; + + /* Must be after magic is set. */ + result = dns_zone_setdbtype(zone, dbargc_default, dbargv_default); + if (result != ISC_R_SUCCESS) { + goto free_erefs; + } + + ISC_EVENT_INIT(&zone->ctlevent, sizeof(zone->ctlevent), 0, NULL, + DNS_EVENT_ZONECONTROL, zone_shutdown, zone, zone, + NULL, NULL); + *zonep = zone; + return (ISC_R_SUCCESS); + + free_erefs: + isc_refcount_decrement(&zone->erefs, NULL); + isc_refcount_destroy(&zone->erefs); + + free_dblock: + ZONEDB_DESTROYLOCK(&zone->dblock); + + free_mutex: + DESTROYLOCK(&zone->lock); + + free_zone: + isc_mem_putanddetach(&zone->mctx, zone, sizeof(*zone)); + return (result); +} + +/* + * Free a zone. Because we require that there be no more + * outstanding events or references, no locking is necessary. + */ +static void +zone_free(dns_zone_t *zone) { + isc_mem_t *mctx = NULL; + dns_signing_t *signing; + dns_nsec3chain_t *nsec3chain; + isc_event_t *setnsec3param_event; + dns_include_t *include; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(isc_refcount_current(&zone->erefs) == 0); + REQUIRE(zone->irefs == 0); + REQUIRE(!LOCKED_ZONE(zone)); + REQUIRE(zone->timer == NULL); + REQUIRE(zone->zmgr == NULL); + + /* + * Managed objects. Order is important. + */ + if (zone->request != NULL) { + dns_request_destroy(&zone->request); /* XXXMPA */ + } + INSIST(zone->readio == NULL); + INSIST(zone->statelist == NULL); + INSIST(zone->writeio == NULL); + + if (zone->task != NULL) { + isc_task_detach(&zone->task); + } + if (zone->loadtask != NULL) { + isc_task_detach(&zone->loadtask); + } + if (zone->view != NULL) { + dns_view_weakdetach(&zone->view); + } + if (zone->prev_view != NULL) { + dns_view_weakdetach(&zone->prev_view); + } + + /* Unmanaged objects */ + while (!ISC_LIST_EMPTY(zone->setnsec3param_queue)) { + setnsec3param_event = ISC_LIST_HEAD(zone->setnsec3param_queue); + ISC_LIST_UNLINK(zone->setnsec3param_queue, setnsec3param_event, + ev_link); + isc_event_free(&setnsec3param_event); + } + for (signing = ISC_LIST_HEAD(zone->signing); + signing != NULL; + signing = ISC_LIST_HEAD(zone->signing)) { + ISC_LIST_UNLINK(zone->signing, signing, link); + dns_db_detach(&signing->db); + dns_dbiterator_destroy(&signing->dbiterator); + isc_mem_put(zone->mctx, signing, sizeof *signing); + } + for (nsec3chain = ISC_LIST_HEAD(zone->nsec3chain); + nsec3chain != NULL; + nsec3chain = ISC_LIST_HEAD(zone->nsec3chain)) { + ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain, link); + dns_db_detach(&nsec3chain->db); + dns_dbiterator_destroy(&nsec3chain->dbiterator); + isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain); + } + for (include = ISC_LIST_HEAD(zone->includes); + include != NULL; + include = ISC_LIST_HEAD(zone->includes)) { + ISC_LIST_UNLINK(zone->includes, include, link); + isc_mem_free(zone->mctx, include->name); + isc_mem_put(zone->mctx, include, sizeof *include); + } + for (include = ISC_LIST_HEAD(zone->newincludes); + include != NULL; + include = ISC_LIST_HEAD(zone->newincludes)) { + ISC_LIST_UNLINK(zone->newincludes, include, link); + isc_mem_free(zone->mctx, include->name); + isc_mem_put(zone->mctx, include, sizeof *include); + } + if (zone->masterfile != NULL) { + isc_mem_free(zone->mctx, zone->masterfile); + } + zone->masterfile = NULL; + if (zone->keydirectory != NULL) { + isc_mem_free(zone->mctx, zone->keydirectory); + } + zone->keydirectory = NULL; + zone->journalsize = -1; + if (zone->journal != NULL) { + isc_mem_free(zone->mctx, zone->journal); + } + zone->journal = NULL; + if (zone->stats != NULL) { + isc_stats_detach(&zone->stats); + } + if (zone->requeststats != NULL) { + isc_stats_detach(&zone->requeststats); + } + if (zone->rcvquerystats != NULL){ + dns_stats_detach(&zone->rcvquerystats); + } + if (zone->db != NULL) { + zone_detachdb(zone); + } + if (zone->acache != NULL) { + dns_acache_detach(&zone->acache); + } + if (zone->rpzs != NULL) { + REQUIRE(zone->rpz_num < zone->rpzs->p.num_zones); + dns_rpz_detach_rpzs(&zone->rpzs); + zone->rpz_num = DNS_RPZ_INVALID_NUM; + } + if (zone->catzs != NULL) { + dns_catz_catzs_detach(&zone->catzs); + } + zone_freedbargs(zone); + RUNTIME_CHECK(dns_zone_setmasterswithkeys(zone, NULL, + NULL, 0) == ISC_R_SUCCESS); + RUNTIME_CHECK(dns_zone_setalsonotify(zone, NULL, 0) == ISC_R_SUCCESS); + zone->check_names = dns_severity_ignore; + if (zone->update_acl != NULL) { + dns_acl_detach(&zone->update_acl); + } + if (zone->forward_acl != NULL) { + dns_acl_detach(&zone->forward_acl); + } + if (zone->notify_acl != NULL) { + dns_acl_detach(&zone->notify_acl); + } + if (zone->query_acl != NULL) { + dns_acl_detach(&zone->query_acl); + } + if (zone->queryon_acl != NULL) { + dns_acl_detach(&zone->queryon_acl); + } + if (zone->xfr_acl != NULL) { + dns_acl_detach(&zone->xfr_acl); + } + if (dns_name_dynamic(&zone->origin)) { + dns_name_free(&zone->origin, zone->mctx); + } + if (zone->strnamerd != NULL) { + isc_mem_free(zone->mctx, zone->strnamerd); + } + if (zone->strname != NULL) { + isc_mem_free(zone->mctx, zone->strname); + } + if (zone->strrdclass != NULL) { + isc_mem_free(zone->mctx, zone->strrdclass); + } + if (zone->strviewname != NULL) { + isc_mem_free(zone->mctx, zone->strviewname); + } + if (zone->ssutable != NULL) { + dns_ssutable_detach(&zone->ssutable); + } + + /* last stuff */ + ZONEDB_DESTROYLOCK(&zone->dblock); + DESTROYLOCK(&zone->lock); + isc_refcount_destroy(&zone->erefs); + zone->magic = 0; + mctx = zone->mctx; + isc_mem_put(mctx, zone, sizeof(*zone)); + isc_mem_detach(&mctx); +} + +/* + * Returns true iff this the signed side of an inline-signing zone. + * Caller should hold zone lock. + */ +static inline bool +inline_secure(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + if (zone->raw != NULL) + return (true); + return (false); +} + +/* + * Returns true iff this the unsigned side of an inline-signing zone + * Caller should hold zone lock. + */ +static inline bool +inline_raw(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + if (zone->secure != NULL) + return (true); + return (false); +} + +/* + * Single shot. + */ +void +dns_zone_setclass(dns_zone_t *zone, dns_rdataclass_t rdclass) { + char namebuf[1024]; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(rdclass != dns_rdataclass_none); + + /* + * Test and set. + */ + LOCK_ZONE(zone); + INSIST(zone != zone->raw); + REQUIRE(zone->rdclass == dns_rdataclass_none || + zone->rdclass == rdclass); + zone->rdclass = rdclass; + + if (zone->strnamerd != NULL) + isc_mem_free(zone->mctx, zone->strnamerd); + if (zone->strrdclass != NULL) + isc_mem_free(zone->mctx, zone->strrdclass); + + zone_namerd_tostr(zone, namebuf, sizeof namebuf); + zone->strnamerd = isc_mem_strdup(zone->mctx, namebuf); + zone_rdclass_tostr(zone, namebuf, sizeof namebuf); + zone->strrdclass = isc_mem_strdup(zone->mctx, namebuf); + + if (inline_secure(zone)) + dns_zone_setclass(zone->raw, rdclass); + UNLOCK_ZONE(zone); +} + +dns_rdataclass_t +dns_zone_getclass(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->rdclass); +} + +void +dns_zone_setnotifytype(dns_zone_t *zone, dns_notifytype_t notifytype) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->notifytype = notifytype; + UNLOCK_ZONE(zone); +} + +isc_result_t +dns_zone_getserial2(dns_zone_t *zone, uint32_t *serialp) { + isc_result_t result; + unsigned int soacount; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(serialp != NULL); + + LOCK_ZONE(zone); + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) { + result = zone_get_from_db(zone, zone->db, NULL, &soacount, + serialp, NULL, NULL, NULL, NULL, + NULL); + if (result == ISC_R_SUCCESS && soacount == 0) + result = ISC_R_FAILURE; + } else + result = DNS_R_NOTLOADED; + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + UNLOCK_ZONE(zone); + + return (result); +} + +uint32_t +dns_zone_getserial(dns_zone_t *zone) { + isc_result_t result; + uint32_t serial; + + result = dns_zone_getserial2(zone, &serial); + if (result != ISC_R_SUCCESS) + serial = 0; /* XXX: not really correct, but no other choice */ + + return (serial); +} + +/* + * Single shot. + */ +void +dns_zone_settype(dns_zone_t *zone, dns_zonetype_t type) { + char namebuf[1024]; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(type != dns_zone_none); + + /* + * Test and set. + */ + LOCK_ZONE(zone); + REQUIRE(zone->type == dns_zone_none || zone->type == type); + zone->type = type; + + if (zone->strnamerd != NULL) + isc_mem_free(zone->mctx, zone->strnamerd); + + zone_namerd_tostr(zone, namebuf, sizeof namebuf); + zone->strnamerd = isc_mem_strdup(zone->mctx, namebuf); + UNLOCK_ZONE(zone); +} + +static void +zone_freedbargs(dns_zone_t *zone) { + unsigned int i; + + /* Free the old database argument list. */ + if (zone->db_argv != NULL) { + for (i = 0; i < zone->db_argc; i++) + isc_mem_free(zone->mctx, zone->db_argv[i]); + isc_mem_put(zone->mctx, zone->db_argv, + zone->db_argc * sizeof(*zone->db_argv)); + } + zone->db_argc = 0; + zone->db_argv = NULL; +} + +isc_result_t +dns_zone_getdbtype(dns_zone_t *zone, char ***argv, isc_mem_t *mctx) { + size_t size = 0; + unsigned int i; + isc_result_t result = ISC_R_SUCCESS; + void *mem; + char **tmp, *tmp2, *base; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(argv != NULL && *argv == NULL); + + LOCK_ZONE(zone); + size = (zone->db_argc + 1) * sizeof(char *); + for (i = 0; i < zone->db_argc; i++) + size += strlen(zone->db_argv[i]) + 1; + mem = isc_mem_allocate(mctx, size); + if (mem != NULL) { + tmp = mem; + tmp2 = mem; + base = mem; + tmp2 += (zone->db_argc + 1) * sizeof(char *); + for (i = 0; i < zone->db_argc; i++) { + *tmp++ = tmp2; + strlcpy(tmp2, zone->db_argv[i], size - (tmp2 - base)); + tmp2 += strlen(tmp2) + 1; + } + *tmp = NULL; + } else + result = ISC_R_NOMEMORY; + UNLOCK_ZONE(zone); + *argv = mem; + return (result); +} + +isc_result_t +dns_zone_setdbtype(dns_zone_t *zone, + unsigned int dbargc, const char * const *dbargv) +{ + isc_result_t result = ISC_R_SUCCESS; + char **argv = NULL; + unsigned int i; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(dbargc >= 1); + REQUIRE(dbargv != NULL); + + LOCK_ZONE(zone); + + /* Set up a new database argument list. */ + argv = isc_mem_get(zone->mctx, dbargc * sizeof(*argv)); + if (argv == NULL) { + goto nomem; + } + for (i = 0; i < dbargc; i++) { + argv[i] = NULL; + } + for (i = 0; i < dbargc; i++) { + argv[i] = isc_mem_strdup(zone->mctx, dbargv[i]); + if (argv[i] == NULL) + goto nomem; + } + + /* Free the old list. */ + zone_freedbargs(zone); + + zone->db_argc = dbargc; + zone->db_argv = argv; + result = ISC_R_SUCCESS; + goto unlock; + + nomem: + if (argv != NULL) { + for (i = 0; i < dbargc; i++) { + if (argv[i] != NULL) { + isc_mem_free(zone->mctx, argv[i]); + } + } + isc_mem_put(zone->mctx, argv, dbargc * sizeof(*argv)); + } + result = ISC_R_NOMEMORY; + + unlock: + UNLOCK_ZONE(zone); + return (result); +} + +static void +dns_zone_setview_helper(dns_zone_t *zone, dns_view_t *view) { + char namebuf[1024]; + + if (zone->prev_view == NULL && zone->view != NULL) { + dns_view_weakattach(zone->view, &zone->prev_view); + } + + INSIST(zone != zone->raw); + if (zone->view != NULL) { + dns_view_weakdetach(&zone->view); + } + dns_view_weakattach(view, &zone->view); + + if (zone->strviewname != NULL) { + isc_mem_free(zone->mctx, zone->strviewname); + } + if (zone->strnamerd != NULL) { + isc_mem_free(zone->mctx, zone->strnamerd); + } + + zone_namerd_tostr(zone, namebuf, sizeof namebuf); + zone->strnamerd = isc_mem_strdup(zone->mctx, namebuf); + zone_viewname_tostr(zone, namebuf, sizeof namebuf); + zone->strviewname = isc_mem_strdup(zone->mctx, namebuf); + + if (inline_secure(zone)) { + dns_zone_setview(zone->raw, view); + } +} + +void +dns_zone_setview(dns_zone_t *zone, dns_view_t *view) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + dns_zone_setview_helper(zone, view); + UNLOCK_ZONE(zone); +} + +dns_view_t * +dns_zone_getview(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->view); +} + +void +dns_zone_setviewcommit(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->prev_view != NULL) + dns_view_weakdetach(&zone->prev_view); + UNLOCK_ZONE(zone); +} + +void +dns_zone_setviewrevert(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->prev_view != NULL) { + dns_zone_setview_helper(zone, zone->prev_view); + dns_view_weakdetach(&zone->prev_view); + } + UNLOCK_ZONE(zone); +} + +isc_result_t +dns_zone_setorigin(dns_zone_t *zone, const dns_name_t *origin) { + isc_result_t result; + char namebuf[1024]; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(origin != NULL); + + LOCK_ZONE(zone); + INSIST(zone != zone->raw); + if (dns_name_dynamic(&zone->origin)) { + dns_name_free(&zone->origin, zone->mctx); + dns_name_init(&zone->origin, NULL); + } + result = dns_name_dup(origin, zone->mctx, &zone->origin); + + if (zone->strnamerd != NULL) + isc_mem_free(zone->mctx, zone->strnamerd); + if (zone->strname != NULL) + isc_mem_free(zone->mctx, zone->strname); + + zone_namerd_tostr(zone, namebuf, sizeof namebuf); + zone->strnamerd = isc_mem_strdup(zone->mctx, namebuf); + zone_name_tostr(zone, namebuf, sizeof namebuf); + zone->strname = isc_mem_strdup(zone->mctx, namebuf); + + if (result == ISC_R_SUCCESS && inline_secure(zone)) + result = dns_zone_setorigin(zone->raw, origin); + UNLOCK_ZONE(zone); + return (result); +} + +void +dns_zone_setacache(dns_zone_t *zone, dns_acache_t *acache) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(acache != NULL); + + LOCK_ZONE(zone); + if (zone->acache != NULL) + dns_acache_detach(&zone->acache); + dns_acache_attach(acache, &zone->acache); + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) { + isc_result_t result; + + /* + * If the zone reuses an existing DB, the DB needs to be + * set in the acache explicitly. We can safely ignore the + * case where the DB is already set. If other error happens, + * the acache will not work effectively. + */ + result = dns_acache_setdb(acache, zone->db); + if (result != ISC_R_SUCCESS && result != ISC_R_EXISTS) { + UNEXPECTED_ERROR(__FILE__, __LINE__, + "dns_acache_setdb() failed: %s", + isc_result_totext(result)); + } + } + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + UNLOCK_ZONE(zone); +} + +static isc_result_t +dns_zone_setstring(dns_zone_t *zone, char **field, const char *value) { + char *copy; + + if (value != NULL) { + copy = isc_mem_strdup(zone->mctx, value); + if (copy == NULL) + return (ISC_R_NOMEMORY); + } else { + copy = NULL; + } + + if (*field != NULL) + isc_mem_free(zone->mctx, *field); + + *field = copy; + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_zone_setfile(dns_zone_t *zone, const char *file) { + return (dns_zone_setfile3(zone, file, dns_masterformat_text, + &dns_master_style_default)); +} + +isc_result_t +dns_zone_setfile2(dns_zone_t *zone, const char *file, + dns_masterformat_t format) +{ + return (dns_zone_setfile3(zone, file, format, + &dns_master_style_default)); +} + +isc_result_t +dns_zone_setfile3(dns_zone_t *zone, const char *file, + dns_masterformat_t format, + const dns_master_style_t *style) +{ + isc_result_t result = ISC_R_SUCCESS; + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + result = dns_zone_setstring(zone, &zone->masterfile, file); + if (result == ISC_R_SUCCESS) { + zone->masterformat = format; + if (format == dns_masterformat_text) + zone->masterstyle = style; + result = default_journal(zone); + } + UNLOCK_ZONE(zone); + + return (result); +} + +const char * +dns_zone_getfile(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->masterfile); +} + +dns_ttl_t +dns_zone_getmaxttl(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->maxttl); +} + +void +dns_zone_setmaxttl(dns_zone_t *zone, dns_ttl_t maxttl) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (maxttl != 0) + zone->options2 |= DNS_ZONEOPT2_CHECKTTL; + else + zone->options2 &= ~DNS_ZONEOPT2_CHECKTTL; + zone->maxttl = maxttl; + UNLOCK_ZONE(zone); + + return; +} + +static isc_result_t +default_journal(dns_zone_t *zone) { + isc_result_t result; + char *journal; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(LOCKED_ZONE(zone)); + + if (zone->masterfile != NULL) { + /* Calculate string length including '\0'. */ + int len = strlen(zone->masterfile) + sizeof(".jnl"); + journal = isc_mem_allocate(zone->mctx, len); + if (journal == NULL) + return (ISC_R_NOMEMORY); + strlcpy(journal, zone->masterfile, len); + strlcat(journal, ".jnl", len); + } else { + journal = NULL; + } + result = dns_zone_setstring(zone, &zone->journal, journal); + if (journal != NULL) + isc_mem_free(zone->mctx, journal); + return (result); +} + +isc_result_t +dns_zone_setjournal(dns_zone_t *zone, const char *myjournal) { + isc_result_t result = ISC_R_SUCCESS; + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + result = dns_zone_setstring(zone, &zone->journal, myjournal); + UNLOCK_ZONE(zone); + + return (result); +} + +char * +dns_zone_getjournal(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->journal); +} + +/* + * Return true iff the zone is "dynamic", in the sense that the zone's + * master file (if any) is written by the server, rather than being + * updated manually and read by the server. + * + * This is true for slave zones, stub zones, key zones, and zones that + * allow dynamic updates either by having an update policy ("ssutable") + * or an "allow-update" ACL with a value other than exactly "{ none; }". + */ +bool +dns_zone_isdynamic(dns_zone_t *zone, bool ignore_freeze) { + REQUIRE(DNS_ZONE_VALID(zone)); + + if (zone->type == dns_zone_slave || zone->type == dns_zone_stub || + zone->type == dns_zone_key || + (zone->type == dns_zone_redirect && zone->masters != NULL)) + return (true); + + /* Inline zones are always dynamic. */ + if (zone->type == dns_zone_master && zone->raw != NULL) + return (true); + + /* If !ignore_freeze, we need check whether updates are disabled. */ + if (zone->type == dns_zone_master && + (!zone->update_disabled || ignore_freeze) && + ((zone->ssutable != NULL) || + (zone->update_acl != NULL && !dns_acl_isnone(zone->update_acl)))) + return (true); + + return (false); + +} + +/* + * Set the response policy index and information for a zone. + */ +isc_result_t +dns_zone_rpz_enable(dns_zone_t *zone, dns_rpz_zones_t *rpzs, + dns_rpz_num_t rpz_num) +{ + /* + * Only RBTDB zones can be used for response policy zones, + * because only they have the code to load the create the summary data. + * Only zones that are loaded instead of mmap()ed create the + * summary data and so can be policy zones. + */ + if (strcmp(zone->db_argv[0], "rbt") != 0 && + strcmp(zone->db_argv[0], "rbt64") != 0) + return (ISC_R_NOTIMPLEMENTED); + if (zone->masterformat == dns_masterformat_map) + return (ISC_R_NOTIMPLEMENTED); + + /* + * This must happen only once or be redundant. + */ + LOCK_ZONE(zone); + if (zone->rpzs != NULL) { + REQUIRE(zone->rpzs == rpzs && zone->rpz_num == rpz_num); + } else { + REQUIRE(zone->rpz_num == DNS_RPZ_INVALID_NUM); + dns_rpz_attach_rpzs(rpzs, &zone->rpzs); + zone->rpz_num = rpz_num; + } + rpzs->defined |= DNS_RPZ_ZBIT(rpz_num); + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); +} + +dns_rpz_num_t +dns_zone_get_rpz_num(dns_zone_t *zone) { + return (zone->rpz_num); +} + +/* + * If a zone is a response policy zone, mark its new database. + */ +void +dns_zone_rpz_enable_db(dns_zone_t *zone, dns_db_t *db) { + if (zone->rpz_num != DNS_RPZ_INVALID_NUM) { + REQUIRE(zone->rpzs != NULL); + dns_db_rpz_attach(db, zone->rpzs, zone->rpz_num); + } +} + +void +dns_zone_catz_enable(dns_zone_t *zone, dns_catz_zones_t *catzs) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(catzs != NULL); + + LOCK_ZONE(zone); + INSIST(zone->catzs == NULL || zone->catzs == catzs); + dns_catz_catzs_set_view(catzs, zone->view); + if (zone->catzs == NULL) + dns_catz_catzs_attach(catzs, &zone->catzs); + UNLOCK_ZONE(zone); +} + +/* + * If a zone is a catalog zone, attach it to update notification in database. + */ +void +dns_zone_catz_enable_db(dns_zone_t *zone, dns_db_t *db) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(db != NULL); + + if (zone->catzs != NULL) { + dns_db_updatenotify_register(db, dns_catz_dbupdate_callback, + zone->catzs); + } +} + +/* + * Set catalog zone ownership of the zone + */ +void +dns_zone_set_parentcatz(dns_zone_t *zone, dns_catz_zone_t *catz) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(catz != NULL); + LOCK_ZONE(zone); + INSIST(zone->parentcatz == NULL || zone->parentcatz == catz); + zone->parentcatz = catz; + UNLOCK_ZONE(zone); +} + +dns_catz_zone_t * +dns_zone_get_parentcatz(const dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->parentcatz); +} + + +static bool +zone_touched(dns_zone_t *zone) { + isc_result_t result; + isc_time_t modtime; + dns_include_t *include; + + REQUIRE(DNS_ZONE_VALID(zone)); + + result = isc_file_getmodtime(zone->masterfile, &modtime); + if (result != ISC_R_SUCCESS || + isc_time_compare(&modtime, &zone->loadtime) > 0) + return (true); + + for (include = ISC_LIST_HEAD(zone->includes); + include != NULL; + include = ISC_LIST_NEXT(include, link)) + { + result = isc_file_getmodtime(include->name, &modtime); + if (result != ISC_R_SUCCESS || + isc_time_compare(&modtime, &include->filetime) > 0) + return (true); + } + + return (false); +} + +/* + * Note: when dealing with inline-signed zones, external callers will always + * call zone_load() for the secure zone; zone_load() calls itself recursively + * in order to load the raw zone. + */ +static isc_result_t +zone_load(dns_zone_t *zone, unsigned int flags, bool locked) { + isc_result_t result; + isc_time_t now; + isc_time_t loadtime; + dns_db_t *db = NULL; + bool rbt, hasraw; + + REQUIRE(DNS_ZONE_VALID(zone)); + + if (!locked) + LOCK_ZONE(zone); + + INSIST(zone != zone->raw); + hasraw = inline_secure(zone); + if (hasraw) { + /* + * We are trying to load an inline-signed zone. First call + * self recursively to try loading the raw version of the zone. + * Assuming the raw zone file is readable, there are two + * possibilities: + * + * a) the raw zone was not yet loaded and thus it will be + * loaded now, synchronously; if this succeeds, a + * subsequent attempt to load the signed zone file will + * take place and thus zone_postload() will be called + * twice: first for the raw zone and then for the secure + * zone; the latter call will take care of syncing the raw + * version with the secure version, + * + * b) the raw zone was already loaded and we are trying to + * reload it, which will happen asynchronously; this means + * zone_postload() will only be called for the raw zone + * because "result" returned by the zone_load() call below + * will not be ISC_R_SUCCESS but rather DNS_R_CONTINUE; + * zone_postload() called for the raw zone will take care + * of syncing the raw version with the secure version. + */ + result = zone_load(zone->raw, flags, false); + if (result != ISC_R_SUCCESS) { + if (!locked) + UNLOCK_ZONE(zone); + return(result); + } + LOCK_ZONE(zone->raw); + } + + TIME_NOW(&now); + + INSIST(zone->type != dns_zone_none); + + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADING)) { + if ((flags & DNS_ZONELOADFLAG_THAW) != 0) + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_THAW); + result = DNS_R_CONTINUE; + goto cleanup; + } + + INSIST(zone->db_argc >= 1); + + rbt = strcmp(zone->db_argv[0], "rbt") == 0 || + strcmp(zone->db_argv[0], "rbt64") == 0; + + if (zone->db != NULL && zone->masterfile == NULL && rbt) { + /* + * The zone has no master file configured. + */ + result = ISC_R_SUCCESS; + goto cleanup; + } + + if (zone->db != NULL && dns_zone_isdynamic(zone, false)) { + /* + * This is a slave, stub, or dynamically updated + * zone being reloaded. Do nothing - the database + * we already have is guaranteed to be up-to-date. + */ + if (zone->type == dns_zone_master && !hasraw) + result = DNS_R_DYNAMIC; + else + result = ISC_R_SUCCESS; + goto cleanup; + } + + /* + * Store the current time before the zone is loaded, so that if the + * file changes between the time of the load and the time that + * zone->loadtime is set, then the file will still be reloaded + * the next time dns_zone_load is called. + */ + TIME_NOW(&loadtime); + + /* + * Don't do the load if the file that stores the zone is older + * than the last time the zone was loaded. If the zone has not + * been loaded yet, zone->loadtime will be the epoch. + */ + if (zone->masterfile != NULL) { + isc_time_t filetime; + + /* + * The file is already loaded. If we are just doing a + * "rndc reconfig", we are done. + */ + if (!isc_time_isepoch(&zone->loadtime) && + (flags & DNS_ZONELOADFLAG_NOSTAT) != 0) { + result = ISC_R_SUCCESS; + goto cleanup; + } + + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) && + !zone_touched(zone)) + { + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "skipping load: master file " + "older than last load"); + result = DNS_R_UPTODATE; + goto cleanup; + } + + /* + * If the file modification time is in the past + * set loadtime to that value. + */ + result = isc_file_getmodtime(zone->masterfile, &filetime); + if (result == ISC_R_SUCCESS && + isc_time_compare(&loadtime, &filetime) > 0) + loadtime = filetime; + } + + /* + * Built in zones (with the exception of empty zones) don't need + * to be reloaded. + */ + if (zone->type == dns_zone_master && + strcmp(zone->db_argv[0], "_builtin") == 0 && + (zone->db_argc < 2 || strcmp(zone->db_argv[1], "empty") != 0) && + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) { + result = ISC_R_SUCCESS; + goto cleanup; + } + + /* + * Zones associated with a DLZ don't need to be loaded either, + * but we need to associate the database with the zone object. + */ + if (strcmp(zone->db_argv[0], "dlz") == 0) { + dns_dlzdb_t *dlzdb; + dns_dlzfindzone_t findzone; + + for (dlzdb = ISC_LIST_HEAD(zone->view->dlz_unsearched); + dlzdb != NULL; + dlzdb = ISC_LIST_NEXT(dlzdb, link)) + { + INSIST(DNS_DLZ_VALID(dlzdb)); + if (strcmp(zone->db_argv[1], dlzdb->dlzname) == 0) + break; + } + + if (dlzdb == NULL) { + dns_zone_log(zone, ISC_LOG_ERROR, + "DLZ %s does not exist or is set " + "to 'search yes;'", zone->db_argv[1]); + result = ISC_R_NOTFOUND; + goto cleanup; + } + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write); + /* ask SDLZ driver if the zone is supported */ + findzone = dlzdb->implementation->methods->findzone; + result = (*findzone)(dlzdb->implementation->driverarg, + dlzdb->dbdata, dlzdb->mctx, + zone->view->rdclass, &zone->origin, + NULL, NULL, &db); + if (result != ISC_R_NOTFOUND) { + if (zone->db != NULL) + zone_detachdb(zone); + zone_attachdb(zone, db); + dns_db_detach(&db); + result = ISC_R_SUCCESS; + } + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write); + + if (result == ISC_R_SUCCESS) { + if (dlzdb->configure_callback == NULL) + goto cleanup; + + result = (*dlzdb->configure_callback)(zone->view, + dlzdb, zone); + if (result != ISC_R_SUCCESS) + dns_zone_log(zone, ISC_LOG_ERROR, + "DLZ configuration callback: %s", + isc_result_totext(result)); + } + goto cleanup; + } + + if ((zone->type == dns_zone_slave || zone->type == dns_zone_stub || + (zone->type == dns_zone_redirect && zone->masters != NULL)) && + rbt) { + if (zone->masterfile == NULL || + !isc_file_exists(zone->masterfile)) { + if (zone->masterfile != NULL) { + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "no master file"); + } + zone->refreshtime = now; + if (zone->task != NULL) + zone_settimer(zone, &now); + result = ISC_R_SUCCESS; + goto cleanup; + } + } + + dns_zone_log(zone, ISC_LOG_DEBUG(1), "starting load"); + + result = dns_db_create(zone->mctx, zone->db_argv[0], + &zone->origin, (zone->type == dns_zone_stub) ? + dns_dbtype_stub : dns_dbtype_zone, + zone->rdclass, + zone->db_argc - 1, zone->db_argv + 1, + &db); + + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "loading zone: creating database: %s", + isc_result_totext(result)); + goto cleanup; + } + dns_db_settask(db, zone->task); + + if (! dns_db_ispersistent(db)) { + if (zone->masterfile != NULL) { + result = zone_startload(db, zone, loadtime); + } else { + result = DNS_R_NOMASTERFILE; + if (zone->type == dns_zone_master || + (zone->type == dns_zone_redirect && + zone->masters == NULL)) { + dns_zone_log(zone, ISC_LOG_ERROR, + "loading zone: " + "no master file configured"); + goto cleanup; + } + dns_zone_log(zone, ISC_LOG_INFO, "loading zone: " + "no master file configured: continuing"); + } + } + + if (result == DNS_R_CONTINUE) { + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADING); + if ((flags & DNS_ZONELOADFLAG_THAW) != 0) + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_THAW); + goto cleanup; + } + + result = zone_postload(zone, db, loadtime, result); + + cleanup: + if (hasraw) + UNLOCK_ZONE(zone->raw); + if (!locked) + UNLOCK_ZONE(zone); + if (db != NULL) + dns_db_detach(&db); + return (result); +} + +isc_result_t +dns_zone_load(dns_zone_t *zone) { + return (zone_load(zone, 0, false)); +} + +isc_result_t +dns_zone_loadnew(dns_zone_t *zone) { + return (zone_load(zone, DNS_ZONELOADFLAG_NOSTAT, false)); +} + +static void +zone_asyncload(isc_task_t *task, isc_event_t *event) { + dns_asyncload_t *asl = event->ev_arg; + dns_zone_t *zone = asl->zone; + isc_result_t result; + + UNUSED(task); + + REQUIRE(DNS_ZONE_VALID(zone)); + + isc_event_free(&event); + + LOCK_ZONE(zone); + result = zone_load(zone, asl->newonly ? DNS_ZONELOADFLAG_NOSTAT : 0, + true); + if (result != DNS_R_CONTINUE) { + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_LOADPENDING); + } + UNLOCK_ZONE(zone); + + /* Inform the zone table we've finished loading */ + if (asl->loaded != NULL) + (asl->loaded)(asl->loaded_arg, zone, task); + + isc_mem_put(zone->mctx, asl, sizeof (*asl)); + dns_zone_idetach(&zone); +} + +isc_result_t +dns_zone_asyncload(dns_zone_t *zone, dns_zt_zoneloaded_t done, void *arg) { + return (dns_zone_asyncload2(zone, done, arg, false)); +} + +isc_result_t +dns_zone_asyncload2(dns_zone_t *zone, dns_zt_zoneloaded_t done, void * arg, + bool newonly) +{ + isc_event_t *e; + dns_asyncload_t *asl = NULL; + isc_result_t result = ISC_R_SUCCESS; + + REQUIRE(DNS_ZONE_VALID(zone)); + + if (zone->zmgr == NULL) + return (ISC_R_FAILURE); + + /* If we already have a load pending, stop now */ + LOCK_ZONE(zone); + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADPENDING)) { + UNLOCK_ZONE(zone); + return (ISC_R_ALREADYRUNNING); + } + + asl = isc_mem_get(zone->mctx, sizeof (*asl)); + if (asl == NULL) + CHECK(ISC_R_NOMEMORY); + + asl->zone = NULL; + asl->loaded = done; + asl->loaded_arg = arg; + asl->newonly = newonly; + + e = isc_event_allocate(zone->zmgr->mctx, zone->zmgr, + DNS_EVENT_ZONELOAD, + zone_asyncload, asl, + sizeof(isc_event_t)); + if (e == NULL) + CHECK(ISC_R_NOMEMORY); + + zone_iattach(zone, &asl->zone); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADPENDING); + isc_task_send(zone->loadtask, &e); + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); + + failure: + if (asl != NULL) + isc_mem_put(zone->mctx, asl, sizeof (*asl)); + UNLOCK_ZONE(zone); + return (result); +} + +bool +dns__zone_loadpending(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADPENDING)); +} + +isc_result_t +dns_zone_loadandthaw(dns_zone_t *zone) { + isc_result_t result; + + if (inline_raw(zone)) + result = zone_load(zone->secure, DNS_ZONELOADFLAG_THAW, + false); + else + result = zone_load(zone, DNS_ZONELOADFLAG_THAW, false); + + switch (result) { + case DNS_R_CONTINUE: + /* Deferred thaw. */ + break; + case DNS_R_UPTODATE: + case ISC_R_SUCCESS: + case DNS_R_SEENINCLUDE: + zone->update_disabled = false; + break; + case DNS_R_NOMASTERFILE: + zone->update_disabled = false; + break; + default: + /* Error, remain in disabled state. */ + break; + } + return (result); +} + +static unsigned int +get_master_options(dns_zone_t *zone) { + unsigned int options; + + options = DNS_MASTER_ZONE | DNS_MASTER_RESIGN; + if (zone->type == dns_zone_slave || + (zone->type == dns_zone_redirect && zone->masters == NULL)) + options |= DNS_MASTER_SLAVE; + if (zone->type == dns_zone_key) + options |= DNS_MASTER_KEY; + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNS)) + options |= DNS_MASTER_CHECKNS; + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_FATALNS)) + options |= DNS_MASTER_FATALNS; + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNAMES)) + options |= DNS_MASTER_CHECKNAMES; + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNAMESFAIL)) + options |= DNS_MASTER_CHECKNAMESFAIL; + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKMX)) + options |= DNS_MASTER_CHECKMX; + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKMXFAIL)) + options |= DNS_MASTER_CHECKMXFAIL; + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKWILDCARD)) + options |= DNS_MASTER_CHECKWILDCARD; + if (DNS_ZONE_OPTION2(zone, DNS_ZONEOPT2_CHECKTTL)) + options |= DNS_MASTER_CHECKTTL; + return (options); +} + +static void +zone_registerinclude(const char *filename, void *arg) { + isc_result_t result; + dns_zone_t *zone = (dns_zone_t *) arg; + dns_include_t *inc = NULL; + + REQUIRE(DNS_ZONE_VALID(zone)); + + if (filename == NULL) + return; + + /* + * Suppress duplicates. + */ + for (inc = ISC_LIST_HEAD(zone->newincludes); + inc != NULL; + inc = ISC_LIST_NEXT(inc, link)) + if (strcmp(filename, inc->name) == 0) + return; + + inc = isc_mem_get(zone->mctx, sizeof(dns_include_t)); + if (inc == NULL) + return; + inc->name = isc_mem_strdup(zone->mctx, filename); + if (inc->name == NULL) { + isc_mem_put(zone->mctx, inc, sizeof(dns_include_t)); + return; + } + ISC_LINK_INIT(inc, link); + + result = isc_file_getmodtime(filename, &inc->filetime); + if (result != ISC_R_SUCCESS) + isc_time_settoepoch(&inc->filetime); + + ISC_LIST_APPEND(zone->newincludes, inc, link); +} + +static void +zone_gotreadhandle(isc_task_t *task, isc_event_t *event) { + dns_load_t *load = event->ev_arg; + isc_result_t result = ISC_R_SUCCESS; + unsigned int options; + + REQUIRE(DNS_LOAD_VALID(load)); + + if ((event->ev_attributes & ISC_EVENTATTR_CANCELED) != 0) + result = ISC_R_CANCELED; + isc_event_free(&event); + if (result == ISC_R_CANCELED) + goto fail; + + options = get_master_options(load->zone); + + result = dns_master_loadfileinc5(load->zone->masterfile, + dns_db_origin(load->db), + dns_db_origin(load->db), + load->zone->rdclass, options, 0, + &load->callbacks, task, + zone_loaddone, load, + &load->zone->lctx, + zone_registerinclude, + load->zone, load->zone->mctx, + load->zone->masterformat, + load->zone->maxttl); + if (result != ISC_R_SUCCESS && result != DNS_R_CONTINUE && + result != DNS_R_SEENINCLUDE) + goto fail; + return; + + fail: + zone_loaddone(load, result); +} + +static void +get_raw_serial(dns_zone_t *raw, dns_masterrawheader_t *rawdata) { + isc_result_t result; + unsigned int soacount; + + LOCK(&raw->lock); + if (raw->db != NULL) { + result = zone_get_from_db(raw, raw->db, NULL, &soacount, + &rawdata->sourceserial, + NULL, NULL, NULL, NULL, + NULL); + if (result == ISC_R_SUCCESS && soacount > 0U) + rawdata->flags |= DNS_MASTERRAW_SOURCESERIALSET; + } + UNLOCK(&raw->lock); +} + +static void +zone_gotwritehandle(isc_task_t *task, isc_event_t *event) { + const char me[] = "zone_gotwritehandle"; + dns_zone_t *zone = event->ev_arg; + isc_result_t result = ISC_R_SUCCESS; + dns_dbversion_t *version = NULL; + dns_masterrawheader_t rawdata; + + REQUIRE(DNS_ZONE_VALID(zone)); + INSIST(task == zone->task); + ENTER; + + if ((event->ev_attributes & ISC_EVENTATTR_CANCELED) != 0) + result = ISC_R_CANCELED; + isc_event_free(&event); + if (result == ISC_R_CANCELED) + goto fail; + + LOCK_ZONE(zone); + INSIST(zone != zone->raw); + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) { + const dns_master_style_t *output_style; + + dns_db_currentversion(zone->db, &version); + dns_master_initrawheader(&rawdata); + if (inline_secure(zone)) + get_raw_serial(zone->raw, &rawdata); + if (zone->type == dns_zone_key) + output_style = &dns_master_style_keyzone; + else if (zone->masterstyle != NULL) + output_style = zone->masterstyle; + else + output_style = &dns_master_style_default; + result = dns_master_dumpinc3(zone->mctx, zone->db, version, + output_style, zone->masterfile, + zone->task, dump_done, zone, &zone->dctx, zone->masterformat, + &rawdata); + dns_db_closeversion(zone->db, &version, false); + } else + result = ISC_R_CANCELED; + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + UNLOCK_ZONE(zone); + if (result != DNS_R_CONTINUE) + goto fail; + return; + + fail: + dump_done(zone, result); +} + +/* + * Save the raw serial number for inline-signing zones. + * (XXX: Other information from the header will be used + * for other purposes in the future, but for now this is + * all we're interested in.) + */ +static void +zone_setrawdata(dns_zone_t *zone, dns_masterrawheader_t *header) { + if ((header->flags & DNS_MASTERRAW_SOURCESERIALSET) == 0) + return; + + zone->sourceserial = header->sourceserial; + zone->sourceserialset = true; +} + +void +dns_zone_setrawdata(dns_zone_t *zone, dns_masterrawheader_t *header) { + if (zone == NULL) + return; + + LOCK_ZONE(zone); + zone_setrawdata(zone, header); + UNLOCK_ZONE(zone); +} + +static isc_result_t +zone_startload(dns_db_t *db, dns_zone_t *zone, isc_time_t loadtime) { + dns_load_t *load; + isc_result_t result; + isc_result_t tresult; + unsigned int options; + + dns_zone_rpz_enable_db(zone, db); + dns_zone_catz_enable_db(zone, db); + options = get_master_options(zone); + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_MANYERRORS)) + options |= DNS_MASTER_MANYERRORS; + + if (zone->zmgr != NULL && zone->db != NULL && zone->loadtask != NULL) { + load = isc_mem_get(zone->mctx, sizeof(*load)); + if (load == NULL) + return (ISC_R_NOMEMORY); + + load->mctx = NULL; + load->zone = NULL; + load->db = NULL; + load->loadtime = loadtime; + load->magic = LOAD_MAGIC; + + isc_mem_attach(zone->mctx, &load->mctx); + zone_iattach(zone, &load->zone); + dns_db_attach(db, &load->db); + dns_rdatacallbacks_init(&load->callbacks); + load->callbacks.rawdata = zone_setrawdata; + zone_iattach(zone, &load->callbacks.zone); + result = dns_db_beginload(db, &load->callbacks); + if (result != ISC_R_SUCCESS) + goto cleanup; + result = zonemgr_getio(zone->zmgr, true, zone->loadtask, + zone_gotreadhandle, load, + &zone->readio); + if (result != ISC_R_SUCCESS) { + /* + * We can't report multiple errors so ignore + * the result of dns_db_endload(). + */ + (void)dns_db_endload(load->db, &load->callbacks); + goto cleanup; + } else + result = DNS_R_CONTINUE; + } else { + dns_rdatacallbacks_t callbacks; + + dns_rdatacallbacks_init(&callbacks); + callbacks.rawdata = zone_setrawdata; + zone_iattach(zone, &callbacks.zone); + result = dns_db_beginload(db, &callbacks); + if (result != ISC_R_SUCCESS) { + zone_idetach(&callbacks.zone); + return (result); + } + result = dns_master_loadfile5(zone->masterfile, + &zone->origin, &zone->origin, + zone->rdclass, options, 0, + &callbacks, + zone_registerinclude, + zone, zone->mctx, + zone->masterformat, + zone->maxttl); + tresult = dns_db_endload(db, &callbacks); + if (result == ISC_R_SUCCESS) + result = tresult; + zone_idetach(&callbacks.zone); + } + + return (result); + + cleanup: + load->magic = 0; + dns_db_detach(&load->db); + zone_idetach(&load->zone); + zone_idetach(&load->callbacks.zone); + isc_mem_detach(&load->mctx); + isc_mem_put(zone->mctx, load, sizeof(*load)); + return (result); +} + +static bool +zone_check_mx(dns_zone_t *zone, dns_db_t *db, dns_name_t *name, + dns_name_t *owner) +{ + isc_result_t result; + char ownerbuf[DNS_NAME_FORMATSIZE]; + char namebuf[DNS_NAME_FORMATSIZE]; + char altbuf[DNS_NAME_FORMATSIZE]; + dns_fixedname_t fixed; + dns_name_t *foundname; + int level; + + /* + * "." means the services does not exist. + */ + if (dns_name_equal(name, dns_rootname)) + return (true); + + /* + * Outside of zone. + */ + if (!dns_name_issubdomain(name, &zone->origin)) { + if (zone->checkmx != NULL) + return ((zone->checkmx)(zone, name, owner)); + return (true); + } + + if (zone->type == dns_zone_master) + level = ISC_LOG_ERROR; + else + level = ISC_LOG_WARNING; + + foundname = dns_fixedname_initname(&fixed); + + result = dns_db_find(db, name, NULL, dns_rdatatype_a, + 0, 0, NULL, foundname, NULL, NULL); + if (result == ISC_R_SUCCESS) + return (true); + + if (result == DNS_R_NXRRSET) { + result = dns_db_find(db, name, NULL, dns_rdatatype_aaaa, + 0, 0, NULL, foundname, NULL, NULL); + if (result == ISC_R_SUCCESS) + return (true); + } + + dns_name_format(owner, ownerbuf, sizeof ownerbuf); + dns_name_format(name, namebuf, sizeof namebuf); + if (result == DNS_R_NXRRSET || result == DNS_R_NXDOMAIN || + result == DNS_R_EMPTYNAME) { + if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKMXFAIL)) + level = ISC_LOG_WARNING; + dns_zone_log(zone, level, + "%s/MX '%s' has no address records (A or AAAA)", + ownerbuf, namebuf); + return ((level == ISC_LOG_WARNING) ? true : false); + } + + if (result == DNS_R_CNAME) { + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_WARNMXCNAME) || + DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNOREMXCNAME)) + level = ISC_LOG_WARNING; + if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNOREMXCNAME)) + dns_zone_log(zone, level, + "%s/MX '%s' is a CNAME (illegal)", + ownerbuf, namebuf); + return ((level == ISC_LOG_WARNING) ? true : false); + } + + if (result == DNS_R_DNAME) { + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_WARNMXCNAME) || + DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNOREMXCNAME)) + level = ISC_LOG_WARNING; + if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNOREMXCNAME)) { + dns_name_format(foundname, altbuf, sizeof altbuf); + dns_zone_log(zone, level, "%s/MX '%s' is below a DNAME" + " '%s' (illegal)", ownerbuf, namebuf, + altbuf); + } + return ((level == ISC_LOG_WARNING) ? true : false); + } + + if (zone->checkmx != NULL && result == DNS_R_DELEGATION) + return ((zone->checkmx)(zone, name, owner)); + + return (true); +} + +static bool +zone_check_srv(dns_zone_t *zone, dns_db_t *db, dns_name_t *name, + dns_name_t *owner) +{ + isc_result_t result; + char ownerbuf[DNS_NAME_FORMATSIZE]; + char namebuf[DNS_NAME_FORMATSIZE]; + char altbuf[DNS_NAME_FORMATSIZE]; + dns_fixedname_t fixed; + dns_name_t *foundname; + int level; + + /* + * "." means the services does not exist. + */ + if (dns_name_equal(name, dns_rootname)) + return (true); + + /* + * Outside of zone. + */ + if (!dns_name_issubdomain(name, &zone->origin)) { + if (zone->checksrv != NULL) + return ((zone->checksrv)(zone, name, owner)); + return (true); + } + + if (zone->type == dns_zone_master) + level = ISC_LOG_ERROR; + else + level = ISC_LOG_WARNING; + + foundname = dns_fixedname_initname(&fixed); + + result = dns_db_find(db, name, NULL, dns_rdatatype_a, + 0, 0, NULL, foundname, NULL, NULL); + if (result == ISC_R_SUCCESS) + return (true); + + if (result == DNS_R_NXRRSET) { + result = dns_db_find(db, name, NULL, dns_rdatatype_aaaa, + 0, 0, NULL, foundname, NULL, NULL); + if (result == ISC_R_SUCCESS) + return (true); + } + + dns_name_format(owner, ownerbuf, sizeof ownerbuf); + dns_name_format(name, namebuf, sizeof namebuf); + if (result == DNS_R_NXRRSET || result == DNS_R_NXDOMAIN || + result == DNS_R_EMPTYNAME) { + dns_zone_log(zone, level, + "%s/SRV '%s' has no address records (A or AAAA)", + ownerbuf, namebuf); + /* XXX950 make fatal for 9.5.0. */ + return (true); + } + + if (result == DNS_R_CNAME) { + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_WARNSRVCNAME) || + DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNORESRVCNAME)) + level = ISC_LOG_WARNING; + if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNORESRVCNAME)) + dns_zone_log(zone, level, + "%s/SRV '%s' is a CNAME (illegal)", + ownerbuf, namebuf); + return ((level == ISC_LOG_WARNING) ? true : false); + } + + if (result == DNS_R_DNAME) { + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_WARNSRVCNAME) || + DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNORESRVCNAME)) + level = ISC_LOG_WARNING; + if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNORESRVCNAME)) { + dns_name_format(foundname, altbuf, sizeof altbuf); + dns_zone_log(zone, level, "%s/SRV '%s' is below a " + "DNAME '%s' (illegal)", ownerbuf, namebuf, + altbuf); + } + return ((level == ISC_LOG_WARNING) ? true : false); + } + + if (zone->checksrv != NULL && result == DNS_R_DELEGATION) + return ((zone->checksrv)(zone, name, owner)); + + return (true); +} + +static bool +zone_check_glue(dns_zone_t *zone, dns_db_t *db, dns_name_t *name, + dns_name_t *owner) +{ + bool answer = true; + isc_result_t result, tresult; + char ownerbuf[DNS_NAME_FORMATSIZE]; + char namebuf[DNS_NAME_FORMATSIZE]; + char altbuf[DNS_NAME_FORMATSIZE]; + dns_fixedname_t fixed; + dns_name_t *foundname; + dns_rdataset_t a; + dns_rdataset_t aaaa; + int level; + + /* + * Outside of zone. + */ + if (!dns_name_issubdomain(name, &zone->origin)) { + if (zone->checkns != NULL) + return ((zone->checkns)(zone, name, owner, NULL, NULL)); + return (true); + } + + if (zone->type == dns_zone_master) + level = ISC_LOG_ERROR; + else + level = ISC_LOG_WARNING; + + foundname = dns_fixedname_initname(&fixed); + dns_rdataset_init(&a); + dns_rdataset_init(&aaaa); + + /* + * Perform a regular lookup to catch DNAME records then look + * for glue. + */ + result = dns_db_find(db, name, NULL, dns_rdatatype_a, + 0, 0, NULL, foundname, &a, NULL); + switch (result) { + case ISC_R_SUCCESS: + case DNS_R_DNAME: + case DNS_R_CNAME: + break; + default: + if (dns_rdataset_isassociated(&a)) + dns_rdataset_disassociate(&a); + result = dns_db_find(db, name, NULL, dns_rdatatype_a, + DNS_DBFIND_GLUEOK, 0, NULL, + foundname, &a, NULL); + } + if (result == ISC_R_SUCCESS) { + dns_rdataset_disassociate(&a); + return (true); + } else if (result == DNS_R_DELEGATION) + dns_rdataset_disassociate(&a); + + if (result == DNS_R_NXRRSET || result == DNS_R_DELEGATION || + result == DNS_R_GLUE) { + tresult = dns_db_find(db, name, NULL, dns_rdatatype_aaaa, + DNS_DBFIND_GLUEOK, 0, NULL, + foundname, &aaaa, NULL); + if (tresult == ISC_R_SUCCESS) { + if (dns_rdataset_isassociated(&a)) + dns_rdataset_disassociate(&a); + dns_rdataset_disassociate(&aaaa); + return (true); + } + if (tresult == DNS_R_DELEGATION || tresult == DNS_R_DNAME) + dns_rdataset_disassociate(&aaaa); + if (result == DNS_R_GLUE || tresult == DNS_R_GLUE) { + /* + * Check glue against child zone. + */ + if (zone->checkns != NULL) + answer = (zone->checkns)(zone, name, owner, + &a, &aaaa); + if (dns_rdataset_isassociated(&a)) + dns_rdataset_disassociate(&a); + if (dns_rdataset_isassociated(&aaaa)) + dns_rdataset_disassociate(&aaaa); + return (answer); + } + } + + dns_name_format(owner, ownerbuf, sizeof ownerbuf); + dns_name_format(name, namebuf, sizeof namebuf); + if (result == DNS_R_NXRRSET || result == DNS_R_NXDOMAIN || + result == DNS_R_EMPTYNAME || result == DNS_R_DELEGATION) { + const char *what; + bool required = false; + if (dns_name_issubdomain(name, owner)) { + what = "REQUIRED GLUE "; + required = true; + } else if (result == DNS_R_DELEGATION) + what = "SIBLING GLUE "; + else + what = ""; + + if (result != DNS_R_DELEGATION || required || + DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKSIBLING)) { + dns_zone_log(zone, level, "%s/NS '%s' has no %s" + "address records (A or AAAA)", + ownerbuf, namebuf, what); + /* + * Log missing address record. + */ + if (result == DNS_R_DELEGATION && zone->checkns != NULL) + (void)(zone->checkns)(zone, name, owner, + &a, &aaaa); + /* XXX950 make fatal for 9.5.0. */ + /* answer = false; */ + } + } else if (result == DNS_R_CNAME) { + dns_zone_log(zone, level, "%s/NS '%s' is a CNAME (illegal)", + ownerbuf, namebuf); + /* XXX950 make fatal for 9.5.0. */ + /* answer = false; */ + } else if (result == DNS_R_DNAME) { + dns_name_format(foundname, altbuf, sizeof altbuf); + dns_zone_log(zone, level, + "%s/NS '%s' is below a DNAME '%s' (illegal)", + ownerbuf, namebuf, altbuf); + /* XXX950 make fatal for 9.5.0. */ + /* answer = false; */ + } + + if (dns_rdataset_isassociated(&a)) + dns_rdataset_disassociate(&a); + if (dns_rdataset_isassociated(&aaaa)) + dns_rdataset_disassociate(&aaaa); + return (answer); +} + +static bool +zone_rrset_check_dup(dns_zone_t *zone, dns_name_t *owner, + dns_rdataset_t *rdataset) +{ + dns_rdataset_t tmprdataset; + isc_result_t result; + bool answer = true; + bool format = true; + int level = ISC_LOG_WARNING; + char ownerbuf[DNS_NAME_FORMATSIZE]; + char typebuf[DNS_RDATATYPE_FORMATSIZE]; + unsigned int count1 = 0; + + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKDUPRRFAIL)) + level = ISC_LOG_ERROR; + + dns_rdataset_init(&tmprdataset); + for (result = dns_rdataset_first(rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(rdataset)) { + dns_rdata_t rdata1 = DNS_RDATA_INIT; + unsigned int count2 = 0; + + count1++; + dns_rdataset_current(rdataset, &rdata1); + dns_rdataset_clone(rdataset, &tmprdataset); + for (result = dns_rdataset_first(&tmprdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&tmprdataset)) { + dns_rdata_t rdata2 = DNS_RDATA_INIT; + count2++; + if (count1 >= count2) + continue; + dns_rdataset_current(&tmprdataset, &rdata2); + if (dns_rdata_casecompare(&rdata1, &rdata2) == 0) { + if (format) { + dns_name_format(owner, ownerbuf, + sizeof ownerbuf); + dns_rdatatype_format(rdata1.type, + typebuf, + sizeof(typebuf)); + format = false; + } + dns_zone_log(zone, level, "%s/%s has " + "semantically identical records", + ownerbuf, typebuf); + if (level == ISC_LOG_ERROR) + answer = false; + break; + } + } + dns_rdataset_disassociate(&tmprdataset); + if (!format) + break; + } + return (answer); +} + +static bool +zone_check_dup(dns_zone_t *zone, dns_db_t *db) { + dns_dbiterator_t *dbiterator = NULL; + dns_dbnode_t *node = NULL; + dns_fixedname_t fixed; + dns_name_t *name; + dns_rdataset_t rdataset; + dns_rdatasetiter_t *rdsit = NULL; + bool ok = true; + isc_result_t result; + + name = dns_fixedname_initname(&fixed); + dns_rdataset_init(&rdataset); + + result = dns_db_createiterator(db, 0, &dbiterator); + if (result != ISC_R_SUCCESS) + return (true); + + for (result = dns_dbiterator_first(dbiterator); + result == ISC_R_SUCCESS; + result = dns_dbiterator_next(dbiterator)) { + result = dns_dbiterator_current(dbiterator, &node, name); + if (result != ISC_R_SUCCESS) + continue; + + result = dns_db_allrdatasets(db, node, NULL, 0, &rdsit); + if (result != ISC_R_SUCCESS) + continue; + + for (result = dns_rdatasetiter_first(rdsit); + result == ISC_R_SUCCESS; + result = dns_rdatasetiter_next(rdsit)) { + dns_rdatasetiter_current(rdsit, &rdataset); + if (!zone_rrset_check_dup(zone, name, &rdataset)) + ok = false; + dns_rdataset_disassociate(&rdataset); + } + dns_rdatasetiter_destroy(&rdsit); + dns_db_detachnode(db, &node); + } + + if (node != NULL) + dns_db_detachnode(db, &node); + dns_dbiterator_destroy(&dbiterator); + + return (ok); +} + +static bool +isspf(const dns_rdata_t *rdata) { + char buf[1024]; + const unsigned char *data = rdata->data; + unsigned int rdl = rdata->length, i = 0, tl, len; + + while (rdl > 0U) { + len = tl = *data; + ++data; + --rdl; + INSIST(tl <= rdl); + if (len > sizeof(buf) - i - 1) + len = sizeof(buf) - i - 1; + memmove(buf + i, data, len); + i += len; + data += tl; + rdl -= tl; + } + + if (i < 6U) + return(false); + + buf[i] = 0; + if (strncmp(buf, "v=spf1", 6) == 0 && (buf[6] == 0 || buf[6] == ' ')) + return (true); + return (false); +} + +static bool +integrity_checks(dns_zone_t *zone, dns_db_t *db) { + dns_dbiterator_t *dbiterator = NULL; + dns_dbnode_t *node = NULL; + dns_rdataset_t rdataset; + dns_fixedname_t fixed; + dns_fixedname_t fixedbottom; + dns_rdata_mx_t mx; + dns_rdata_ns_t ns; + dns_rdata_in_srv_t srv; + dns_rdata_t rdata; + dns_name_t *name; + dns_name_t *bottom; + isc_result_t result; + bool ok = true, have_spf, have_txt; + + name = dns_fixedname_initname(&fixed); + bottom = dns_fixedname_initname(&fixedbottom); + dns_rdataset_init(&rdataset); + dns_rdata_init(&rdata); + + result = dns_db_createiterator(db, 0, &dbiterator); + if (result != ISC_R_SUCCESS) + return (true); + + result = dns_dbiterator_first(dbiterator); + while (result == ISC_R_SUCCESS) { + result = dns_dbiterator_current(dbiterator, &node, name); + if (result != ISC_R_SUCCESS) + goto cleanup; + + /* + * Is this name visible in the zone? + */ + if (!dns_name_issubdomain(name, &zone->origin) || + (dns_name_countlabels(bottom) > 0 && + dns_name_issubdomain(name, bottom))) + goto next; + + /* + * Don't check the NS records at the origin. + */ + if (dns_name_equal(name, &zone->origin)) + goto checkfordname; + + result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_ns, + 0, 0, &rdataset, NULL); + if (result != ISC_R_SUCCESS) + goto checkfordname; + /* + * Remember bottom of zone due to NS. + */ + dns_name_copy(name, bottom, NULL); + + result = dns_rdataset_first(&rdataset); + while (result == ISC_R_SUCCESS) { + dns_rdataset_current(&rdataset, &rdata); + result = dns_rdata_tostruct(&rdata, &ns, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + if (!zone_check_glue(zone, db, &ns.name, name)) + ok = false; + dns_rdata_reset(&rdata); + result = dns_rdataset_next(&rdataset); + } + dns_rdataset_disassociate(&rdataset); + goto next; + + checkfordname: + result = dns_db_findrdataset(db, node, NULL, + dns_rdatatype_dname, 0, 0, + &rdataset, NULL); + if (result == ISC_R_SUCCESS) { + /* + * Remember bottom of zone due to DNAME. + */ + dns_name_copy(name, bottom, NULL); + dns_rdataset_disassociate(&rdataset); + } + + result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_mx, + 0, 0, &rdataset, NULL); + if (result != ISC_R_SUCCESS) + goto checksrv; + result = dns_rdataset_first(&rdataset); + while (result == ISC_R_SUCCESS) { + dns_rdataset_current(&rdataset, &rdata); + result = dns_rdata_tostruct(&rdata, &mx, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + if (!zone_check_mx(zone, db, &mx.mx, name)) + ok = false; + dns_rdata_reset(&rdata); + result = dns_rdataset_next(&rdataset); + } + dns_rdataset_disassociate(&rdataset); + + checksrv: + if (zone->rdclass != dns_rdataclass_in) + goto next; + result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_srv, + 0, 0, &rdataset, NULL); + if (result != ISC_R_SUCCESS) + goto checkspf; + result = dns_rdataset_first(&rdataset); + while (result == ISC_R_SUCCESS) { + dns_rdataset_current(&rdataset, &rdata); + result = dns_rdata_tostruct(&rdata, &srv, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + if (!zone_check_srv(zone, db, &srv.target, name)) + ok = false; + dns_rdata_reset(&rdata); + result = dns_rdataset_next(&rdataset); + } + dns_rdataset_disassociate(&rdataset); + + checkspf: + /* + * Check if there is a type SPF record without an + * SPF-formatted type TXT record also being present. + */ + if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKSPF)) + goto next; + if (zone->rdclass != dns_rdataclass_in) + goto next; + have_spf = have_txt = false; + result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_spf, + 0, 0, &rdataset, NULL); + if (result == ISC_R_SUCCESS) { + dns_rdataset_disassociate(&rdataset); + have_spf = true; + } + result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_txt, + 0, 0, &rdataset, NULL); + if (result != ISC_R_SUCCESS) + goto notxt; + result = dns_rdataset_first(&rdataset); + while (result == ISC_R_SUCCESS) { + dns_rdataset_current(&rdataset, &rdata); + have_txt = isspf(&rdata); + dns_rdata_reset(&rdata); + if (have_txt) + break; + result = dns_rdataset_next(&rdataset); + } + dns_rdataset_disassociate(&rdataset); + + notxt: + if (have_spf && !have_txt) { + char namebuf[DNS_NAME_FORMATSIZE]; + + dns_name_format(name, namebuf, sizeof(namebuf)); + dns_zone_log(zone, ISC_LOG_WARNING, "'%s' found type " + "SPF record but no SPF TXT record found, " + "add matching type TXT record", namebuf); + } + + next: + dns_db_detachnode(db, &node); + result = dns_dbiterator_next(dbiterator); + } + + cleanup: + if (node != NULL) + dns_db_detachnode(db, &node); + dns_dbiterator_destroy(&dbiterator); + + return (ok); +} + +/* + * OpenSSL verification of RSA keys with exponent 3 is known to be + * broken prior OpenSSL 0.9.8c/0.9.7k. Look for such keys and warn + * if they are in use. + */ +static void +zone_check_dnskeys(dns_zone_t *zone, dns_db_t *db) { + dns_dbnode_t *node = NULL; + dns_dbversion_t *version = NULL; + dns_rdata_dnskey_t dnskey; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdataset_t rdataset; + isc_result_t result; + bool logit, foundrsa = false, foundmd5 = false; + const char *algorithm; + + result = dns_db_findnode(db, &zone->origin, false, &node); + if (result != ISC_R_SUCCESS) + goto cleanup; + + dns_db_currentversion(db, &version); + dns_rdataset_init(&rdataset); + result = dns_db_findrdataset(db, node, version, dns_rdatatype_dnskey, + dns_rdatatype_none, 0, &rdataset, NULL); + if (result != ISC_R_SUCCESS) + goto cleanup; + + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) + { + dns_rdataset_current(&rdataset, &rdata); + result = dns_rdata_tostruct(&rdata, &dnskey, NULL); + INSIST(result == ISC_R_SUCCESS); + + if ((dnskey.algorithm == DST_ALG_RSASHA1 || + dnskey.algorithm == DST_ALG_RSAMD5) && + dnskey.datalen > 1 && dnskey.data[0] == 1 && + dnskey.data[1] == 3) + { + if (dnskey.algorithm == DST_ALG_RSASHA1) { + logit = !foundrsa; + foundrsa = true; + algorithm = "RSASHA1"; + } else { + logit = !foundmd5; + foundmd5 = true; + algorithm = "RSAMD5"; + } + if (logit) + dns_zone_log(zone, ISC_LOG_WARNING, + "weak %s (%u) key found " + "(exponent=3)", algorithm, + dnskey.algorithm); + if (foundrsa && foundmd5) + break; + } + dns_rdata_reset(&rdata); + } + dns_rdataset_disassociate(&rdataset); + + cleanup: + if (node != NULL) + dns_db_detachnode(db, &node); + if (version != NULL) + dns_db_closeversion(db, &version, false); +} + +static void +resume_signingwithkey(dns_zone_t *zone) { + dns_dbnode_t *node = NULL; + dns_dbversion_t *version = NULL; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdataset_t rdataset; + isc_result_t result; + dns_db_t *db = NULL; + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) + dns_db_attach(zone->db, &db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + if (db == NULL) + goto cleanup; + + result = dns_db_findnode(db, &zone->origin, false, &node); + if (result != ISC_R_SUCCESS) + goto cleanup; + + dns_db_currentversion(db, &version); + dns_rdataset_init(&rdataset); + result = dns_db_findrdataset(db, node, version, + zone->privatetype, + dns_rdatatype_none, 0, + &rdataset, NULL); + if (result != ISC_R_SUCCESS) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + goto cleanup; + } + + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) + { + dns_rdataset_current(&rdataset, &rdata); + if (rdata.length != 5 || + rdata.data[0] == 0 || rdata.data[4] != 0) { + dns_rdata_reset(&rdata); + continue; + } + + result = zone_signwithkey(zone, rdata.data[0], + (rdata.data[1] << 8) | rdata.data[2], + rdata.data[3]); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_signwithkey failed: %s", + dns_result_totext(result)); + } + dns_rdata_reset(&rdata); + } + dns_rdataset_disassociate(&rdataset); + + cleanup: + if (db != NULL) { + if (node != NULL) + dns_db_detachnode(db, &node); + if (version != NULL) + dns_db_closeversion(db, &version, false); + dns_db_detach(&db); + } +} + +/* + * Initiate adding/removing NSEC3 records belonging to the chain defined by the + * supplied NSEC3PARAM RDATA. + * + * Zone must be locked by caller. + */ +static isc_result_t +zone_addnsec3chain(dns_zone_t *zone, dns_rdata_nsec3param_t *nsec3param) { + dns_nsec3chain_t *nsec3chain, *current; + dns_dbversion_t *version = NULL; + bool nseconly = false, nsec3ok = false; + isc_result_t result; + isc_time_t now; + unsigned int options = 0; + char saltbuf[255*2+1]; + char flags[sizeof("INITIAL|REMOVE|CREATE|NONSEC|OPTOUT")]; + dns_db_t *db = NULL; + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) + dns_db_attach(zone->db, &db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + + if (db == NULL) { + result = ISC_R_SUCCESS; + goto cleanup; + } + + /* + * If this zone is not NSEC3-capable, attempting to remove any NSEC3 + * chain from it is pointless as it would not be possible for the + * latter to exist in the first place. + */ + dns_db_currentversion(db, &version); + result = dns_nsec_nseconly(db, version, &nseconly); + nsec3ok = (result == ISC_R_SUCCESS && !nseconly); + dns_db_closeversion(db, &version, false); + if (!nsec3ok && (nsec3param->flags & DNS_NSEC3FLAG_REMOVE) == 0) { + result = ISC_R_SUCCESS; + goto cleanup; + } + + /* + * Allocate and initialize structure preserving state of + * adding/removing records belonging to this NSEC3 chain between + * separate zone_nsec3chain() calls. + */ + nsec3chain = isc_mem_get(zone->mctx, sizeof *nsec3chain); + if (nsec3chain == NULL) { + result = ISC_R_NOMEMORY; + goto cleanup; + } + + nsec3chain->magic = 0; + nsec3chain->done = false; + nsec3chain->db = NULL; + nsec3chain->dbiterator = NULL; + nsec3chain->nsec3param.common.rdclass = nsec3param->common.rdclass; + nsec3chain->nsec3param.common.rdtype = nsec3param->common.rdtype; + nsec3chain->nsec3param.hash = nsec3param->hash; + nsec3chain->nsec3param.iterations = nsec3param->iterations; + nsec3chain->nsec3param.flags = nsec3param->flags; + nsec3chain->nsec3param.salt_length = nsec3param->salt_length; + memmove(nsec3chain->salt, nsec3param->salt, nsec3param->salt_length); + nsec3chain->nsec3param.salt = nsec3chain->salt; + nsec3chain->seen_nsec = false; + nsec3chain->delete_nsec = false; + nsec3chain->save_delete_nsec = false; + + /* + * Log NSEC3 parameters defined by supplied NSEC3PARAM RDATA. + */ + if (nsec3param->flags == 0) + strlcpy(flags, "NONE", sizeof(flags)); + else { + flags[0] = '\0'; + if (nsec3param->flags & DNS_NSEC3FLAG_REMOVE) + strlcat(flags, "REMOVE", sizeof(flags)); + if (nsec3param->flags & DNS_NSEC3FLAG_INITIAL) { + if (flags[0] == '\0') + strlcpy(flags, "INITIAL", sizeof(flags)); + else + strlcat(flags, "|INITIAL", sizeof(flags)); + } + if (nsec3param->flags & DNS_NSEC3FLAG_CREATE) { + if (flags[0] == '\0') + strlcpy(flags, "CREATE", sizeof(flags)); + else + strlcat(flags, "|CREATE", sizeof(flags)); + } + if (nsec3param->flags & DNS_NSEC3FLAG_NONSEC) { + if (flags[0] == '\0') + strlcpy(flags, "NONSEC", sizeof(flags)); + else + strlcat(flags, "|NONSEC", sizeof(flags)); + } + if (nsec3param->flags & DNS_NSEC3FLAG_OPTOUT) { + if (flags[0] == '\0') + strlcpy(flags, "OPTOUT", sizeof(flags)); + else + strlcat(flags, "|OPTOUT", sizeof(flags)); + } + } + result = dns_nsec3param_salttotext(nsec3param, saltbuf, + sizeof(saltbuf)); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + dns_zone_log(zone, ISC_LOG_INFO, + "zone_addnsec3chain(%u,%s,%u,%s)", + nsec3param->hash, flags, nsec3param->iterations, + saltbuf); + + /* + * If the NSEC3 chain defined by the supplied NSEC3PARAM RDATA is + * currently being processed, interrupt its processing to avoid + * simultaneously adding and removing records for the same NSEC3 chain. + */ + for (current = ISC_LIST_HEAD(zone->nsec3chain); + current != NULL; + current = ISC_LIST_NEXT(current, link)) { + if (current->db == db && + current->nsec3param.hash == nsec3param->hash && + current->nsec3param.iterations == nsec3param->iterations && + current->nsec3param.salt_length == nsec3param->salt_length + && !memcmp(current->nsec3param.salt, nsec3param->salt, + nsec3param->salt_length)) + current->done = true; + } + + /* + * Attach zone database to the structure initialized above and create + * an iterator for it with appropriate options in order to avoid + * creating NSEC3 records for NSEC3 records. + */ + dns_db_attach(db, &nsec3chain->db); + if ((nsec3chain->nsec3param.flags & DNS_NSEC3FLAG_CREATE) != 0) + options = DNS_DB_NONSEC3; + result = dns_db_createiterator(nsec3chain->db, options, + &nsec3chain->dbiterator); + if (result == ISC_R_SUCCESS) + result = dns_dbiterator_first(nsec3chain->dbiterator); + if (result == ISC_R_SUCCESS) { + /* + * Database iterator initialization succeeded. We are now + * ready to kick off adding/removing records belonging to this + * NSEC3 chain. Append the structure initialized above to the + * "nsec3chain" list for the zone and set the appropriate zone + * timer so that zone_nsec3chain() is called as soon as + * possible. + */ + dns_dbiterator_pause(nsec3chain->dbiterator); + ISC_LIST_INITANDAPPEND(zone->nsec3chain, + nsec3chain, link); + nsec3chain = NULL; + if (isc_time_isepoch(&zone->nsec3chaintime)) { + TIME_NOW(&now); + zone->nsec3chaintime = now; + if (zone->task != NULL) + zone_settimer(zone, &now); + } + } + + if (nsec3chain != NULL) { + if (nsec3chain->db != NULL) + dns_db_detach(&nsec3chain->db); + if (nsec3chain->dbiterator != NULL) + dns_dbiterator_destroy(&nsec3chain->dbiterator); + isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain); + } + + cleanup: + if (db != NULL) + dns_db_detach(&db); + return (result); +} + +/* + * Find private-type records at the zone apex which signal that an NSEC3 chain + * should be added or removed. For each such record, extract NSEC3PARAM RDATA + * and pass it to zone_addnsec3chain(). + * + * Zone must be locked by caller. + */ +static void +resume_addnsec3chain(dns_zone_t *zone) { + dns_dbnode_t *node = NULL; + dns_dbversion_t *version = NULL; + dns_rdataset_t rdataset; + isc_result_t result; + dns_rdata_nsec3param_t nsec3param; + bool nseconly = false, nsec3ok = false; + dns_db_t *db = NULL; + + INSIST(LOCKED_ZONE(zone)); + + if (zone->privatetype == 0) + return; + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) + dns_db_attach(zone->db, &db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + if (db == NULL) + goto cleanup; + + result = dns_db_findnode(db, &zone->origin, false, &node); + if (result != ISC_R_SUCCESS) + goto cleanup; + + dns_db_currentversion(db, &version); + + /* + * In order to create NSEC3 chains we need the DNSKEY RRset at zone + * apex to exist and contain no keys using NSEC-only algorithms. + */ + result = dns_nsec_nseconly(db, version, &nseconly); + nsec3ok = (result == ISC_R_SUCCESS && !nseconly); + + /* + * Get the RRset containing all private-type records at the zone apex. + */ + dns_rdataset_init(&rdataset); + result = dns_db_findrdataset(db, node, version, + zone->privatetype, dns_rdatatype_none, + 0, &rdataset, NULL); + if (result != ISC_R_SUCCESS) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + goto cleanup; + } + + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) + { + unsigned char buf[DNS_NSEC3PARAM_BUFFERSIZE]; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdata_t private = DNS_RDATA_INIT; + + dns_rdataset_current(&rdataset, &private); + /* + * Try extracting NSEC3PARAM RDATA from this private-type + * record. Failure means this private-type record does not + * represent an NSEC3PARAM record, so skip it. + */ + if (!dns_nsec3param_fromprivate(&private, &rdata, buf, + sizeof(buf))) + continue; + result = dns_rdata_tostruct(&rdata, &nsec3param, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + if (((nsec3param.flags & DNS_NSEC3FLAG_REMOVE) != 0) || + ((nsec3param.flags & DNS_NSEC3FLAG_CREATE) != 0 && nsec3ok)) + { + /* + * Pass the NSEC3PARAM RDATA contained in this + * private-type record to zone_addnsec3chain() so that + * it can kick off adding or removing NSEC3 records. + */ + result = zone_addnsec3chain(zone, &nsec3param); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_addnsec3chain failed: %s", + dns_result_totext(result)); + } + } + } + dns_rdataset_disassociate(&rdataset); + cleanup: + if (db != NULL) { + if (node != NULL) + dns_db_detachnode(db, &node); + if (version != NULL) + dns_db_closeversion(db, &version, false); + dns_db_detach(&db); + } +} + +static void +set_resigntime(dns_zone_t *zone) { + dns_rdataset_t rdataset; + dns_fixedname_t fixed; + unsigned int resign; + isc_result_t result; + uint32_t nanosecs; + dns_db_t *db = NULL; + + /* We only re-sign zones that can be dynamically updated */ + if (zone->update_disabled) + return; + + if (!inline_secure(zone) && (zone->type != dns_zone_master || + (zone->ssutable == NULL && + (zone->update_acl == NULL || dns_acl_isnone(zone->update_acl))))) + return; + + dns_rdataset_init(&rdataset); + dns_fixedname_init(&fixed); + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) + dns_db_attach(zone->db, &db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + if (db == NULL) { + isc_time_settoepoch(&zone->resigntime); + return; + } + + result = dns_db_getsigningtime(db, &rdataset, + dns_fixedname_name(&fixed)); + if (result != ISC_R_SUCCESS) { + isc_time_settoepoch(&zone->resigntime); + goto cleanup; + } + + resign = rdataset.resign - zone->sigresigninginterval; + dns_rdataset_disassociate(&rdataset); + isc_random_get(&nanosecs); + nanosecs %= 1000000000; + isc_time_set(&zone->resigntime, resign, nanosecs); + cleanup: + dns_db_detach(&db); + return; +} + +static isc_result_t +check_nsec3param(dns_zone_t *zone, dns_db_t *db) { + dns_dbnode_t *node = NULL; + dns_rdataset_t rdataset; + dns_dbversion_t *version = NULL; + dns_rdata_nsec3param_t nsec3param; + bool ok = false; + isc_result_t result; + dns_rdata_t rdata = DNS_RDATA_INIT; + bool dynamic = (zone->type == dns_zone_master) ? + dns_zone_isdynamic(zone, false) : false; + + dns_rdataset_init(&rdataset); + result = dns_db_findnode(db, &zone->origin, false, &node); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "nsec3param lookup failure: %s", + dns_result_totext(result)); + return (result); + } + dns_db_currentversion(db, &version); + + result = dns_db_findrdataset(db, node, version, + dns_rdatatype_nsec3param, + dns_rdatatype_none, 0, &rdataset, NULL); + if (result == ISC_R_NOTFOUND) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + result = ISC_R_SUCCESS; + goto cleanup; + } + if (result != ISC_R_SUCCESS) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + dns_zone_log(zone, ISC_LOG_ERROR, + "nsec3param lookup failure: %s", + dns_result_totext(result)); + goto cleanup; + } + + /* + * For dynamic zones we must support every algorithm so we can + * regenerate all the NSEC3 chains. + * For non-dynamic zones we only need to find a supported algorithm. + */ + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) + { + dns_rdataset_current(&rdataset, &rdata); + result = dns_rdata_tostruct(&rdata, &nsec3param, NULL); + dns_rdata_reset(&rdata); + INSIST(result == ISC_R_SUCCESS); + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_NSEC3TESTZONE) && + nsec3param.hash == DNS_NSEC3_UNKNOWNALG && !dynamic) + { + dns_zone_log(zone, ISC_LOG_WARNING, + "nsec3 test \"unknown\" hash algorithm found: %u", + nsec3param.hash); + ok = true; + } else if (!dns_nsec3_supportedhash(nsec3param.hash)) { + if (dynamic) { + dns_zone_log(zone, ISC_LOG_ERROR, + "unsupported nsec3 hash algorithm" + " in dynamic zone: %u", + nsec3param.hash); + result = DNS_R_BADZONE; + /* Stop second error message. */ + ok = true; + break; + } else + dns_zone_log(zone, ISC_LOG_WARNING, + "unsupported nsec3 hash algorithm: %u", + nsec3param.hash); + } else + ok = true; + } + if (result == ISC_R_NOMORE) + result = ISC_R_SUCCESS; + + if (!ok) { + result = DNS_R_BADZONE; + dns_zone_log(zone, ISC_LOG_ERROR, + "no supported nsec3 hash algorithm"); + } + + cleanup: + if (dns_rdataset_isassociated(&rdataset)) + dns_rdataset_disassociate(&rdataset); + dns_db_closeversion(db, &version, false); + dns_db_detachnode(db, &node); + return (result); +} + +/* + * Set the timer for refreshing the key zone to the soonest future time + * of the set (current timer, keydata->refresh, keydata->addhd, + * keydata->removehd). + */ +static void +set_refreshkeytimer(dns_zone_t *zone, dns_rdata_keydata_t *key, + isc_stdtime_t now, bool force) +{ + const char me[] = "set_refreshkeytimer"; + isc_stdtime_t then; + isc_time_t timenow, timethen; + char timebuf[80]; + + ENTER; + then = key->refresh; + if (force) + then = now; + if (key->addhd > now && key->addhd < then) + then = key->addhd; + if (key->removehd > now && key->removehd < then) + then = key->removehd; + + TIME_NOW(&timenow); + if (then > now) + DNS_ZONE_TIME_ADD(&timenow, then - now, &timethen); + else + timethen = timenow; + if (isc_time_compare(&zone->refreshkeytime, &timenow) < 0 || + isc_time_compare(&timethen, &zone->refreshkeytime) < 0) + zone->refreshkeytime = timethen; + + isc_time_formattimestamp(&zone->refreshkeytime, timebuf, 80); + dns_zone_log(zone, ISC_LOG_DEBUG(1), "next key refresh: %s", timebuf); + zone_settimer(zone, &timenow); +} + +/* + * Convert key(s) linked from 'keynode' to KEYDATA and add to the key zone. + * If the key zone is changed, set '*changed' to true. + */ +static isc_result_t +create_keydata(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver, + dns_diff_t *diff, dns_keytable_t *keytable, + dns_keynode_t **keynodep, bool *changed) +{ + const char me[] = "create_keydata"; + isc_result_t result = ISC_R_SUCCESS; + isc_buffer_t keyb, dstb; + unsigned char key_buf[4096], dst_buf[DST_KEY_MAXSIZE]; + dns_rdata_keydata_t keydata; + dns_rdata_dnskey_t dnskey; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_keynode_t *keynode; + isc_stdtime_t now; + isc_region_t r; + dst_key_t *key; + + REQUIRE(keynodep != NULL); + keynode = *keynodep; + + ENTER; + isc_stdtime_get(&now); + + /* Loop in case there's more than one key. */ + while (result == ISC_R_SUCCESS) { + dns_keynode_t *nextnode = NULL; + + key = dns_keynode_key(keynode); + if (key == NULL) + goto skip; + + isc_buffer_init(&dstb, dst_buf, sizeof(dst_buf)); + CHECK(dst_key_todns(key, &dstb)); + + /* Convert DST key to DNSKEY. */ + dns_rdata_reset(&rdata); + isc_buffer_usedregion(&dstb, &r); + dns_rdata_fromregion(&rdata, dst_key_class(key), + dns_rdatatype_dnskey, &r); + + /* DSTKEY to KEYDATA. */ + CHECK(dns_rdata_tostruct(&rdata, &dnskey, NULL)); + CHECK(dns_keydata_fromdnskey(&keydata, &dnskey, now, 0, 0, + NULL)); + + /* KEYDATA to rdata. */ + dns_rdata_reset(&rdata); + isc_buffer_init(&keyb, key_buf, sizeof(key_buf)); + CHECK(dns_rdata_fromstruct(&rdata, + zone->rdclass, dns_rdatatype_keydata, + &keydata, &keyb)); + + /* Add rdata to zone. */ + CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_ADD, + dst_key_name(key), 0, &rdata)); + *changed = true; + + /* Refresh new keys from the zone apex as soon as possible. */ + set_refreshkeytimer(zone, &keydata, now, true); + + skip: + result = dns_keytable_nextkeynode(keytable, keynode, &nextnode); + if (result != ISC_R_NOTFOUND) { + dns_keytable_detachkeynode(keytable, &keynode); + keynode = nextnode; + } + } + + if (keynode != NULL) + dns_keytable_detachkeynode(keytable, &keynode); + *keynodep = NULL; + + return (ISC_R_SUCCESS); + + failure: + return (result); +} + +/* + * Remove from the key zone all the KEYDATA records found in rdataset. + */ +static isc_result_t +delete_keydata(dns_db_t *db, dns_dbversion_t *ver, dns_diff_t *diff, + dns_name_t *name, dns_rdataset_t *rdataset) +{ + dns_rdata_t rdata = DNS_RDATA_INIT; + isc_result_t result, uresult; + + for (result = dns_rdataset_first(rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(rdataset)) { + dns_rdata_reset(&rdata); + dns_rdataset_current(rdataset, &rdata); + uresult = update_one_rr(db, ver, diff, DNS_DIFFOP_DEL, + name, 0, &rdata); + if (uresult != ISC_R_SUCCESS) + return (uresult); + } + if (result == ISC_R_NOMORE) + result = ISC_R_SUCCESS; + return (result); +} + +/* + * Compute the DNSSEC key ID for a DNSKEY record. + */ +static isc_result_t +compute_tag(dns_name_t *name, dns_rdata_dnskey_t *dnskey, isc_mem_t *mctx, + dns_keytag_t *tag) +{ + isc_result_t result; + dns_rdata_t rdata = DNS_RDATA_INIT; + unsigned char data[4096]; + isc_buffer_t buffer; + dst_key_t *dstkey = NULL; + + isc_buffer_init(&buffer, data, sizeof(data)); + dns_rdata_fromstruct(&rdata, dnskey->common.rdclass, + dns_rdatatype_dnskey, dnskey, &buffer); + + result = dns_dnssec_keyfromrdata(name, &rdata, mctx, &dstkey); + if (result == ISC_R_SUCCESS) { + *tag = dst_key_id(dstkey); + dst_key_free(&dstkey); + } + + return (result); +} + +/* + * Add key to the security roots. + */ +static void +trust_key(dns_zone_t *zone, dns_name_t *keyname, + dns_rdata_dnskey_t *dnskey, isc_mem_t *mctx) +{ + isc_result_t result; + dns_rdata_t rdata = DNS_RDATA_INIT; + unsigned char data[4096]; + isc_buffer_t buffer; + dns_keytable_t *sr = NULL; + dst_key_t *dstkey = NULL; + + /* Convert dnskey to DST key. */ + isc_buffer_init(&buffer, data, sizeof(data)); + dns_rdata_fromstruct(&rdata, dnskey->common.rdclass, + dns_rdatatype_dnskey, dnskey, &buffer); + + result = dns_view_getsecroots(zone->view, &sr); + if (result != ISC_R_SUCCESS) + goto failure; + + CHECK(dns_dnssec_keyfromrdata(keyname, &rdata, mctx, &dstkey)); + CHECK(dns_keytable_add(sr, true, &dstkey)); + dns_keytable_detach(&sr); + + failure: + if (dstkey != NULL) + dst_key_free(&dstkey); + if (sr != NULL) + dns_keytable_detach(&sr); + return; +} + +/* + * Add a null key to the security roots for so that all queries + * to the zone will fail. + */ +static void +fail_secure(dns_zone_t *zone, dns_name_t *keyname) { + isc_result_t result; + dns_keytable_t *sr = NULL; + + result = dns_view_getsecroots(zone->view, &sr); + if (result == ISC_R_SUCCESS) { + dns_keytable_marksecure(sr, keyname); + dns_keytable_detach(&sr); + } +} + +/* + * Scan a set of KEYDATA records from the key zone. The ones that are + * valid (i.e., the add holddown timer has expired) become trusted keys. + */ +static void +load_secroots(dns_zone_t *zone, dns_name_t *name, dns_rdataset_t *rdataset) { + isc_result_t result; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdata_keydata_t keydata; + dns_rdata_dnskey_t dnskey; + isc_mem_t *mctx = zone->mctx; + int trusted = 0, revoked = 0, pending = 0; + isc_stdtime_t now; + dns_keytable_t *sr = NULL; + + isc_stdtime_get(&now); + + result = dns_view_getsecroots(zone->view, &sr); + if (result == ISC_R_SUCCESS) { + dns_keytable_delete(sr, name); + dns_keytable_detach(&sr); + } + + /* Now insert all the accepted trust anchors from this keydata set. */ + for (result = dns_rdataset_first(rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(rdataset)) { + dns_rdata_reset(&rdata); + dns_rdataset_current(rdataset, &rdata); + + /* Convert rdata to keydata. */ + result = dns_rdata_tostruct(&rdata, &keydata, NULL); + if (result == ISC_R_UNEXPECTEDEND) + continue; + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + /* Set the key refresh timer to force a fast refresh. */ + set_refreshkeytimer(zone, &keydata, now, true); + + /* If the removal timer is nonzero, this key was revoked. */ + if (keydata.removehd != 0) { + revoked++; + continue; + } + + /* + * If the add timer is still pending, this key is not + * trusted yet. + */ + if (now < keydata.addhd) { + pending++; + continue; + } + + /* Convert keydata to dnskey. */ + dns_keydata_todnskey(&keydata, &dnskey, NULL); + + /* Add to keytables. */ + trusted++; + trust_key(zone, name, &dnskey, mctx); + } + + if (trusted == 0 && pending != 0) { + char namebuf[DNS_NAME_FORMATSIZE]; + dns_name_format(name, namebuf, sizeof namebuf); + dns_zone_log(zone, ISC_LOG_ERROR, + "No valid trust anchors for '%s'!", namebuf); + dns_zone_log(zone, ISC_LOG_ERROR, + "%d key(s) revoked, %d still pending", + revoked, pending); + dns_zone_log(zone, ISC_LOG_ERROR, + "All queries to '%s' will fail", namebuf); + fail_secure(zone, name); + } +} + +static isc_result_t +do_one_tuple(dns_difftuple_t **tuple, dns_db_t *db, dns_dbversion_t *ver, + dns_diff_t *diff) +{ + dns_diff_t temp_diff; + isc_result_t result; + + /* + * Create a singleton diff. + */ + dns_diff_init(diff->mctx, &temp_diff); + ISC_LIST_APPEND(temp_diff.tuples, *tuple, link); + + /* + * Apply it to the database. + */ + result = dns_diff_apply(&temp_diff, db, ver); + ISC_LIST_UNLINK(temp_diff.tuples, *tuple, link); + if (result != ISC_R_SUCCESS) { + dns_difftuple_free(tuple); + return (result); + } + + /* + * Merge it into the current pending journal entry. + */ + dns_diff_appendminimal(diff, tuple); + + /* + * Do not clear temp_diff. + */ + return (ISC_R_SUCCESS); +} + +static isc_result_t +update_one_rr(dns_db_t *db, dns_dbversion_t *ver, dns_diff_t *diff, + dns_diffop_t op, dns_name_t *name, dns_ttl_t ttl, + dns_rdata_t *rdata) +{ + dns_difftuple_t *tuple = NULL; + isc_result_t result; + result = dns_difftuple_create(diff->mctx, op, + name, ttl, rdata, &tuple); + if (result != ISC_R_SUCCESS) + return (result); + return (do_one_tuple(&tuple, db, ver, diff)); +} + +static isc_result_t +update_soa_serial(dns_db_t *db, dns_dbversion_t *ver, dns_diff_t *diff, + isc_mem_t *mctx, dns_updatemethod_t method) { + dns_difftuple_t *deltuple = NULL; + dns_difftuple_t *addtuple = NULL; + uint32_t serial; + isc_result_t result; + + INSIST(method != dns_updatemethod_none); + + CHECK(dns_db_createsoatuple(db, ver, mctx, DNS_DIFFOP_DEL, &deltuple)); + CHECK(dns_difftuple_copy(deltuple, &addtuple)); + addtuple->op = DNS_DIFFOP_ADD; + + serial = dns_soa_getserial(&addtuple->rdata); + serial = dns_update_soaserial(serial, method); + dns_soa_setserial(serial, &addtuple->rdata); + CHECK(do_one_tuple(&deltuple, db, ver, diff)); + CHECK(do_one_tuple(&addtuple, db, ver, diff)); + result = ISC_R_SUCCESS; + + failure: + if (addtuple != NULL) + dns_difftuple_free(&addtuple); + if (deltuple != NULL) + dns_difftuple_free(&deltuple); + return (result); +} + +/* + * Write all transactions in 'diff' to the zone journal file. + */ +static isc_result_t +zone_journal(dns_zone_t *zone, dns_diff_t *diff, uint32_t *sourceserial, + const char *caller) +{ + const char me[] = "zone_journal"; + const char *journalfile; + isc_result_t result = ISC_R_SUCCESS; + dns_journal_t *journal = NULL; + unsigned int mode = DNS_JOURNAL_CREATE|DNS_JOURNAL_WRITE; + + ENTER; + journalfile = dns_zone_getjournal(zone); + if (journalfile != NULL) { + result = dns_journal_open(zone->mctx, journalfile, mode, + &journal); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "%s:dns_journal_open -> %s", + caller, dns_result_totext(result)); + return (result); + } + + if (sourceserial != NULL) + dns_journal_set_sourceserial(journal, *sourceserial); + + result = dns_journal_write_transaction(journal, diff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "%s:dns_journal_write_transaction -> %s", + caller, dns_result_totext(result)); + } + dns_journal_destroy(&journal); + } + + return (result); +} + +/* + * Create an SOA record for a newly-created zone + */ +static isc_result_t +add_soa(dns_zone_t *zone, dns_db_t *db) { + isc_result_t result; + dns_rdata_t rdata = DNS_RDATA_INIT; + unsigned char buf[DNS_SOA_BUFFERSIZE]; + dns_dbversion_t *ver = NULL; + dns_diff_t diff; + + dns_zone_log(zone, ISC_LOG_DEBUG(1), "creating SOA"); + + dns_diff_init(zone->mctx, &diff); + result = dns_db_newversion(db, &ver); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "add_soa:dns_db_newversion -> %s", + dns_result_totext(result)); + goto failure; + } + + /* Build SOA record */ + result = dns_soa_buildrdata(&zone->origin, dns_rootname, zone->rdclass, + 0, 0, 0, 0, 0, buf, &rdata); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "add_soa:dns_soa_buildrdata -> %s", + dns_result_totext(result)); + goto failure; + } + + result = update_one_rr(db, ver, &diff, DNS_DIFFOP_ADD, + &zone->origin, 0, &rdata); + +failure: + dns_diff_clear(&diff); + if (ver != NULL) + dns_db_closeversion(db, &ver, (result == ISC_R_SUCCESS)); + + INSIST(ver == NULL); + + return (result); +} + +struct addifmissing_arg { + dns_db_t *db; + dns_dbversion_t *ver; + dns_diff_t *diff; + dns_zone_t *zone; + bool *changed; + isc_result_t result; +}; + +static void +addifmissing(dns_keytable_t *keytable, dns_keynode_t *keynode, void *arg) { + dns_db_t *db = ((struct addifmissing_arg *)arg)->db; + dns_dbversion_t *ver = ((struct addifmissing_arg *)arg)->ver; + dns_diff_t *diff = ((struct addifmissing_arg *)arg)->diff; + dns_zone_t *zone = ((struct addifmissing_arg *)arg)->zone; + bool *changed = ((struct addifmissing_arg *)arg)->changed; + isc_result_t result; + dns_keynode_t *dummy = NULL; + + if (((struct addifmissing_arg *)arg)->result != ISC_R_SUCCESS) + return; + + if (dns_keynode_managed(keynode)) { + dns_fixedname_t fname; + dns_name_t *keyname; + dst_key_t *key; + + key = dns_keynode_key(keynode); + if (key == NULL) + return; + dns_fixedname_init(&fname); + + keyname = dst_key_name(key); + result = dns_db_find(db, keyname, ver, + dns_rdatatype_keydata, + DNS_DBFIND_NOWILD, 0, NULL, + dns_fixedname_name(&fname), + NULL, NULL); + if (result == ISC_R_SUCCESS) + return; + dns_keytable_attachkeynode(keytable, keynode, &dummy); + result = create_keydata(zone, db, ver, diff, keytable, + &dummy, changed); + if (result != ISC_R_SUCCESS && result != ISC_R_NOMORE) + ((struct addifmissing_arg *)arg)->result = result; + } +}; + +/* + * Synchronize the set of initializing keys found in managed-keys {} + * statements with the set of trust anchors found in the managed-keys.bind + * zone. If a domain is no longer named in managed-keys, delete all keys + * from that domain from the key zone. If a domain is mentioned in in + * managed-keys but there are no references to it in the key zone, load + * the key zone with the initializing key(s) for that domain. + */ +static isc_result_t +sync_keyzone(dns_zone_t *zone, dns_db_t *db) { + isc_result_t result = ISC_R_SUCCESS; + bool changed = false; + bool commit = false; + dns_keynode_t *keynode = NULL; + dns_view_t *view = zone->view; + dns_keytable_t *sr = NULL; + dns_dbversion_t *ver = NULL; + dns_diff_t diff; + dns_rriterator_t rrit; + struct addifmissing_arg arg; + + dns_zone_log(zone, ISC_LOG_DEBUG(1), "synchronizing trusted keys"); + + dns_diff_init(zone->mctx, &diff); + + CHECK(dns_view_getsecroots(view, &sr)); + + result = dns_db_newversion(db, &ver); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "sync_keyzone:dns_db_newversion -> %s", + dns_result_totext(result)); + goto failure; + } + + /* + * Walk the zone DB. If we find any keys whose names are no longer + * in managed-keys (or *are* in trusted-keys, meaning they are + * permanent and not RFC5011-maintained), delete them from the + * zone. Otherwise call load_secroots(), which loads keys into + * secroots as appropriate. + */ + dns_rriterator_init(&rrit, db, ver, 0); + for (result = dns_rriterator_first(&rrit); + result == ISC_R_SUCCESS; + result = dns_rriterator_nextrrset(&rrit)) { + dns_rdataset_t *rdataset = NULL; + dns_name_t *rrname = NULL; + uint32_t ttl; + + dns_rriterator_current(&rrit, &rrname, &ttl, + &rdataset, NULL); + if (!dns_rdataset_isassociated(rdataset)) { + dns_rriterator_destroy(&rrit); + goto failure; + } + + if (rdataset->type != dns_rdatatype_keydata) + continue; + + result = dns_keytable_find(sr, rrname, &keynode); + if ((result != ISC_R_SUCCESS && + result != DNS_R_PARTIALMATCH) || + dns_keynode_managed(keynode) == false) + { + CHECK(delete_keydata(db, ver, &diff, + rrname, rdataset)); + changed = true; + } else { + load_secroots(zone, rrname, rdataset); + } + + if (keynode != NULL) + dns_keytable_detachkeynode(sr, &keynode); + } + dns_rriterator_destroy(&rrit); + + /* + * Now walk secroots to find any managed keys that aren't + * in the zone. If we find any, we add them to the zone. + */ + arg.db = db; + arg.ver = ver; + arg.result = ISC_R_SUCCESS; + arg.diff = &diff; + arg.zone = zone; + arg.changed = &changed; + dns_keytable_forall(sr, addifmissing, &arg); + result = arg.result; + if (changed) { + /* Write changes to journal file. */ + CHECK(update_soa_serial(db, ver, &diff, zone->mctx, + zone->updatemethod)); + CHECK(zone_journal(zone, &diff, NULL, "sync_keyzone")); + + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED); + zone_needdump(zone, 30); + commit = true; + } + + failure: + if (result != ISC_R_SUCCESS && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) { + dns_zone_log(zone, ISC_LOG_ERROR, + "unable to synchronize managed keys: %s", + dns_result_totext(result)); + isc_time_settoepoch(&zone->refreshkeytime); + } + if (keynode != NULL) + dns_keytable_detachkeynode(sr, &keynode); + if (sr != NULL) + dns_keytable_detach(&sr); + if (ver != NULL) + dns_db_closeversion(db, &ver, commit); + dns_diff_clear(&diff); + + INSIST(ver == NULL); + + return (result); +} + +isc_result_t +dns_zone_synckeyzone(dns_zone_t *zone) { + isc_result_t result; + dns_db_t *db = NULL; + + if (zone->type != dns_zone_key) + return (DNS_R_BADZONE); + + CHECK(dns_zone_getdb(zone, &db)); + + LOCK_ZONE(zone); + result = sync_keyzone(zone, db); + UNLOCK_ZONE(zone); + + failure: + if (db != NULL) + dns_db_detach(&db); + return (result); +} + +static void +maybe_send_secure(dns_zone_t *zone) { + isc_result_t result; + + /* + * We've finished loading, or else failed to load, an inline-signing + * 'secure' zone. We now need information about the status of the + * 'raw' zone. If we failed to load, then we need it to send a + * copy of its database; if we succeeded, we need it to send its + * serial number so that we can sync with it. If it has not yet + * loaded, we set a flag so that it will send the necessary + * information when it has finished loading. + */ + if (zone->raw->db != NULL) { + if (zone->db != NULL) { + uint32_t serial; + unsigned int soacount; + + result = zone_get_from_db(zone->raw, zone->raw->db, + NULL, &soacount, &serial, NULL, + NULL, NULL, NULL, NULL); + if (result == ISC_R_SUCCESS && soacount > 0U) + zone_send_secureserial(zone->raw, serial); + } else + zone_send_securedb(zone->raw, zone->raw->db); + + } else + DNS_ZONE_SETFLAG(zone->raw, DNS_ZONEFLG_SENDSECURE); +} + +static bool +zone_unchanged(dns_db_t *db1, dns_db_t *db2, isc_mem_t *mctx) { + isc_result_t result; + bool answer = false; + dns_diff_t diff; + + dns_diff_init(mctx, &diff); + result = dns_db_diffx(&diff, db1, NULL, db2, NULL, NULL); + if (result == ISC_R_SUCCESS && ISC_LIST_EMPTY(diff.tuples)) + answer = true; + dns_diff_clear(&diff); + return (answer); +} + +/* + * The zone is presumed to be locked. + * If this is a inline_raw zone the secure version is also locked. + */ +static isc_result_t +zone_postload(dns_zone_t *zone, dns_db_t *db, isc_time_t loadtime, + isc_result_t result) +{ + unsigned int soacount = 0; + unsigned int nscount = 0; + unsigned int errors = 0; + uint32_t serial, oldserial, refresh, retry, expire, minimum; + isc_time_t now; + bool needdump = false; + bool hasinclude = DNS_ZONE_FLAG(zone, DNS_ZONEFLG_HASINCLUDE); + bool nomaster = false; + unsigned int options; + dns_include_t *inc; + + INSIST(LOCKED_ZONE(zone)); + if (inline_raw(zone)) + INSIST(LOCKED_ZONE(zone->secure)); + + TIME_NOW(&now); + + /* + * Initiate zone transfer? We may need a error code that + * indicates that the "permanent" form does not exist. + * XXX better error feedback to log. + */ + if (result != ISC_R_SUCCESS && result != DNS_R_SEENINCLUDE) { + if (zone->type == dns_zone_slave || + zone->type == dns_zone_stub || + (zone->type == dns_zone_redirect && + zone->masters == NULL)) { + if (result == ISC_R_FILENOTFOUND) + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "no master file"); + else if (result != DNS_R_NOMASTERFILE) + dns_zone_log(zone, ISC_LOG_ERROR, + "loading from master file %s " + "failed: %s", + zone->masterfile, + dns_result_totext(result)); + } else if (zone->type == dns_zone_master && + inline_secure(zone) && result == ISC_R_FILENOTFOUND) + { + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "no master file, requesting db"); + maybe_send_secure(zone); + } else { + int level = ISC_LOG_ERROR; + if (zone->type == dns_zone_key && + result == ISC_R_FILENOTFOUND) + level = ISC_LOG_DEBUG(1); + dns_zone_log(zone, level, + "loading from master file %s failed: %s", + zone->masterfile, + dns_result_totext(result)); + nomaster = true; + } + + if (zone->type != dns_zone_key) + goto cleanup; + } + + dns_zone_log(zone, ISC_LOG_DEBUG(2), + "number of nodes in database: %u", + dns_db_nodecount(db)); + + if (result == DNS_R_SEENINCLUDE) + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_HASINCLUDE); + else + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_HASINCLUDE); + + /* + * If there's no master file for a key zone, then the zone is new: + * create an SOA record. (We do this now, instead of later, so that + * if there happens to be a journal file, we can roll forward from + * a sane starting point.) + */ + if (nomaster && zone->type == dns_zone_key) { + result = add_soa(zone, db); + if (result != ISC_R_SUCCESS) + goto cleanup; + } + + /* + * Apply update log, if any, on initial load. + */ + if (zone->journal != NULL && + ! DNS_ZONE_OPTION(zone, DNS_ZONEOPT_NOMERGE) && + ! DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) + { + if (zone->type == dns_zone_master && (inline_secure(zone) || + (zone->update_acl != NULL || zone->ssutable != NULL))) + { + options = DNS_JOURNALOPT_RESIGN; + } else { + options = 0; + } + result = dns_journal_rollforward(zone->mctx, db, options, + zone->journal); + if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND && + result != DNS_R_UPTODATE && result != DNS_R_NOJOURNAL && + result != ISC_R_RANGE) { + dns_zone_log(zone, ISC_LOG_ERROR, + "journal rollforward failed: %s", + dns_result_totext(result)); + goto cleanup; + + + } + if (result == ISC_R_NOTFOUND || result == ISC_R_RANGE) { + dns_zone_log(zone, ISC_LOG_ERROR, + "journal rollforward failed: " + "journal out of sync with zone"); + goto cleanup; + } + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "journal rollforward completed " + "successfully: %s", + dns_result_totext(result)); + if (result == ISC_R_SUCCESS) + needdump = true; + } + + /* + * Obtain ns, soa and cname counts for top of zone. + */ + INSIST(db != NULL); + result = zone_get_from_db(zone, db, &nscount, &soacount, &serial, + &refresh, &retry, &expire, &minimum, + &errors); + if (result != ISC_R_SUCCESS && zone->type != dns_zone_key) { + dns_zone_log(zone, ISC_LOG_ERROR, + "could not find NS and/or SOA records"); + } + + /* + * Check to make sure the journal is up to date, and remove the + * journal file if it isn't, as we wouldn't be able to apply + * updates otherwise. + */ + if (zone->journal != NULL && dns_zone_isdynamic(zone, true) && + ! DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IXFRFROMDIFFS)) { + uint32_t jserial; + dns_journal_t *journal = NULL; + + result = dns_journal_open(zone->mctx, zone->journal, + DNS_JOURNAL_READ, &journal); + if (result == ISC_R_SUCCESS) { + jserial = dns_journal_last_serial(journal); + dns_journal_destroy(&journal); + } else { + jserial = serial; + result = ISC_R_SUCCESS; + } + + if (jserial != serial) { + dns_zone_log(zone, ISC_LOG_INFO, + "journal file is out of date: " + "removing journal file"); + if (remove(zone->journal) < 0 && errno != ENOENT) { + char strbuf[ISC_STRERRORSIZE]; + isc__strerror(errno, strbuf, sizeof(strbuf)); + isc_log_write(dns_lctx, + DNS_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_ZONE, + ISC_LOG_WARNING, + "unable to remove journal " + "'%s': '%s'", + zone->journal, strbuf); + } + } + } + + dns_zone_log(zone, ISC_LOG_DEBUG(1), "loaded; checking validity"); + + /* + * Master / Slave / Stub zones require both NS and SOA records at + * the top of the zone. + */ + + switch (zone->type) { + case dns_zone_dlz: + case dns_zone_master: + case dns_zone_slave: + case dns_zone_stub: + case dns_zone_redirect: + if (soacount != 1) { + dns_zone_log(zone, ISC_LOG_ERROR, + "has %d SOA records", soacount); + result = DNS_R_BADZONE; + } + if (nscount == 0) { + dns_zone_log(zone, ISC_LOG_ERROR, + "has no NS records"); + result = DNS_R_BADZONE; + } + if (result != ISC_R_SUCCESS) + goto cleanup; + if (zone->type == dns_zone_master && errors != 0) { + result = DNS_R_BADZONE; + goto cleanup; + } + if (zone->type != dns_zone_stub && + zone->type != dns_zone_redirect) { + result = check_nsec3param(zone, db); + if (result != ISC_R_SUCCESS) + goto cleanup; + } + if (zone->type == dns_zone_master && + DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKINTEGRITY) && + !integrity_checks(zone, db)) { + result = DNS_R_BADZONE; + goto cleanup; + } + if (zone->type == dns_zone_master && + DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKDUPRR) && + !zone_check_dup(zone, db)) { + result = DNS_R_BADZONE; + goto cleanup; + } + + if (zone->db != NULL) { + unsigned int oldsoacount; + + /* + * This is checked in zone_replacedb() for slave zones + * as they don't reload from disk. + */ + result = zone_get_from_db(zone, zone->db, NULL, + &oldsoacount, &oldserial, + NULL, NULL, NULL, NULL, + NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + RUNTIME_CHECK(soacount > 0U); + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IXFRFROMDIFFS) && + !isc_serial_gt(serial, oldserial)) { + uint32_t serialmin, serialmax; + + INSIST(zone->type == dns_zone_master); + INSIST(zone->raw == NULL); + + if (serial == oldserial && + zone_unchanged(zone->db, db, zone->mctx)) { + dns_zone_log(zone, ISC_LOG_INFO, + "ixfr-from-differences: " + "unchanged"); + goto done; + } + + serialmin = (oldserial + 1) & 0xffffffffU; + serialmax = (oldserial + 0x7fffffffU) & + 0xffffffffU; + dns_zone_log(zone, ISC_LOG_ERROR, + "ixfr-from-differences: " + "new serial (%u) out of range " + "[%u - %u]", serial, serialmin, + serialmax); + result = DNS_R_BADZONE; + goto cleanup; + } else if (!isc_serial_ge(serial, oldserial)) + dns_zone_log(zone, ISC_LOG_ERROR, + "zone serial (%u/%u) has gone " + "backwards", serial, oldserial); + else if (serial == oldserial && !hasinclude && + strcmp(zone->db_argv[0], "_builtin") != 0) + dns_zone_log(zone, ISC_LOG_ERROR, + "zone serial (%u) unchanged. " + "zone may fail to transfer " + "to slaves.", serial); + } + + if (zone->type == dns_zone_master && + (zone->update_acl != NULL || zone->ssutable != NULL) && + zone->sigresigninginterval < (3 * refresh) && + dns_db_issecure(db)) + { + dns_zone_log(zone, ISC_LOG_WARNING, + "sig-re-signing-interval less than " + "3 * refresh."); + } + + zone->refresh = RANGE(refresh, + zone->minrefresh, zone->maxrefresh); + zone->retry = RANGE(retry, + zone->minretry, zone->maxretry); + zone->expire = RANGE(expire, zone->refresh + zone->retry, + DNS_MAX_EXPIRE); + zone->minimum = minimum; + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_HAVETIMERS); + + if (zone->type == dns_zone_slave || + zone->type == dns_zone_stub || + (zone->type == dns_zone_redirect && + zone->masters != NULL)) { + isc_time_t t; + uint32_t delay; + + result = isc_file_getmodtime(zone->journal, &t); + if (result != ISC_R_SUCCESS) + result = isc_file_getmodtime(zone->masterfile, + &t); + if (result == ISC_R_SUCCESS) + DNS_ZONE_TIME_ADD(&t, zone->expire, + &zone->expiretime); + else + DNS_ZONE_TIME_ADD(&now, zone->retry, + &zone->expiretime); + + delay = isc_random_jitter(zone->retry, + (zone->retry * 3) / 4); + DNS_ZONE_TIME_ADD(&now, delay, &zone->refreshtime); + if (isc_time_compare(&zone->refreshtime, + &zone->expiretime) >= 0) + zone->refreshtime = now; + } + + break; + + case dns_zone_key: + result = sync_keyzone(zone, db); + if (result != ISC_R_SUCCESS) + goto cleanup; + break; + + default: + UNEXPECTED_ERROR(__FILE__, __LINE__, + "unexpected zone type %d", zone->type); + result = ISC_R_UNEXPECTED; + goto cleanup; + } + + /* + * Check for weak DNSKEY's. + */ + if (zone->type == dns_zone_master) + zone_check_dnskeys(zone, db); + + /* + * Schedule DNSSEC key refresh. + */ + if (zone->type == dns_zone_master && + DNS_ZONEKEY_OPTION(zone, DNS_ZONEKEY_MAINTAIN)) + zone->refreshkeytime = now; + +#if 0 + /* destroy notification example. */ + { + isc_event_t *e = isc_event_allocate(zone->mctx, NULL, + DNS_EVENT_DBDESTROYED, + dns_zonemgr_dbdestroyed, + zone, + sizeof(isc_event_t)); + dns_db_ondestroy(db, zone->task, &e); + } +#endif + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write); + if (zone->db != NULL) { + result = zone_replacedb(zone, db, false); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write); + if (result != ISC_R_SUCCESS) + goto cleanup; + } else { + result = dns_db_rpz_ready(db); + if (result != ISC_R_SUCCESS) + goto cleanup; + zone_attachdb(zone, db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write); + DNS_ZONE_SETFLAG(zone, + DNS_ZONEFLG_LOADED| + DNS_ZONEFLG_NEEDSTARTUPNOTIFY); + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_SENDSECURE) && + inline_raw(zone)) + { + if (zone->secure->db == NULL) + zone_send_securedb(zone, db); + else + zone_send_secureserial(zone, serial); + } + } + + /* + * Finished loading inline-signing zone; need to get status + * from the raw side now. + */ + if (zone->type == dns_zone_master && inline_secure(zone)) + maybe_send_secure(zone); + + + result = ISC_R_SUCCESS; + + if (needdump) { + if (zone->type == dns_zone_key) + zone_needdump(zone, 30); + else + zone_needdump(zone, DNS_DUMP_DELAY); + } + + if (zone->task != NULL) { + if (zone->type == dns_zone_master) { + set_resigntime(zone); + resume_signingwithkey(zone); + resume_addnsec3chain(zone); + } + + if (zone->type == dns_zone_master && + !DNS_ZONEKEY_OPTION(zone, DNS_ZONEKEY_NORESIGN) && + dns_zone_isdynamic(zone, false) && + dns_db_issecure(db)) { + dns_name_t *name; + dns_fixedname_t fixed; + dns_rdataset_t next; + + dns_rdataset_init(&next); + name = dns_fixedname_initname(&fixed); + + result = dns_db_getsigningtime(db, &next, name); + if (result == ISC_R_SUCCESS) { + isc_stdtime_t timenow; + char namebuf[DNS_NAME_FORMATSIZE]; + char typebuf[DNS_RDATATYPE_FORMATSIZE]; + + isc_stdtime_get(&timenow); + dns_name_format(name, namebuf, sizeof(namebuf)); + dns_rdatatype_format(next.covers, + typebuf, sizeof(typebuf)); + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "next resign: %s/%s in %d seconds", + namebuf, typebuf, + next.resign - timenow - + zone->sigresigninginterval); + dns_rdataset_disassociate(&next); + } else + dns_zone_log(zone, ISC_LOG_WARNING, + "signed dynamic zone has no " + "resign event scheduled"); + } + + zone_settimer(zone, &now); + } + + /* + * Clear old include list. + */ + for (inc = ISC_LIST_HEAD(zone->includes); + inc != NULL; + inc = ISC_LIST_HEAD(zone->includes)) { + ISC_LIST_UNLINK(zone->includes, inc, link); + isc_mem_free(zone->mctx, inc->name); + isc_mem_put(zone->mctx, inc, sizeof(*inc)); + } + zone->nincludes = 0; + + /* + * Transfer new include list. + */ + for (inc = ISC_LIST_HEAD(zone->newincludes); + inc != NULL; + inc = ISC_LIST_HEAD(zone->newincludes)) { + ISC_LIST_UNLINK(zone->newincludes, inc, link); + ISC_LIST_APPEND(zone->includes, inc, link); + zone->nincludes++; + } + + if (! dns_db_ispersistent(db)) + dns_zone_log(zone, ISC_LOG_INFO, "loaded serial %u%s", serial, + dns_db_issecure(db) ? " (DNSSEC signed)" : ""); + + zone->loadtime = loadtime; + goto done; + + cleanup: + for (inc = ISC_LIST_HEAD(zone->newincludes); + inc != NULL; + inc = ISC_LIST_HEAD(zone->newincludes)) { + ISC_LIST_UNLINK(zone->newincludes, inc, link); + isc_mem_free(zone->mctx, inc->name); + isc_mem_put(zone->mctx, inc, sizeof(*inc)); + } + if (zone->type == dns_zone_slave || + zone->type == dns_zone_stub || + zone->type == dns_zone_key || + (zone->type == dns_zone_redirect && zone->masters != NULL)) { + if (result != ISC_R_NOMEMORY) { + if (zone->journal != NULL) + zone_saveunique(zone, zone->journal, + "jn-XXXXXXXX"); + if (zone->masterfile != NULL) + zone_saveunique(zone, zone->masterfile, + "db-XXXXXXXX"); + } + + /* Mark the zone for immediate refresh. */ + zone->refreshtime = now; + if (zone->task != NULL) + zone_settimer(zone, &now); + result = ISC_R_SUCCESS; + } else if (zone->type == dns_zone_master || + zone->type == dns_zone_redirect) { + if (!(inline_secure(zone) && result == ISC_R_FILENOTFOUND)) + dns_zone_log(zone, ISC_LOG_ERROR, + "not loaded due to errors."); + else if (zone->type == dns_zone_master) + result = ISC_R_SUCCESS; + } + + done: + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_LOADPENDING); + /* + * If this is an inline-signed zone and we were called for the raw + * zone, we need to clear DNS_ZONEFLG_LOADPENDING for the secure zone + * as well, but only if this is a reload, not an initial zone load: in + * the former case, zone_postload() will not be run for the secure + * zone; in the latter case, it will be. Check which case we are + * dealing with by consulting the DNS_ZONEFLG_LOADED flag for the + * secure zone: if it is set, this must be a reload. + */ + if (inline_raw(zone) && + DNS_ZONE_FLAG(zone->secure, DNS_ZONEFLG_LOADED)) + { + DNS_ZONE_CLRFLAG(zone->secure, DNS_ZONEFLG_LOADPENDING); + } + + return (result); +} + +static bool +exit_check(dns_zone_t *zone) { + REQUIRE(LOCKED_ZONE(zone)); + + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_SHUTDOWN) && zone->irefs == 0) { + /* + * DNS_ZONEFLG_SHUTDOWN can only be set if erefs == 0. + */ + INSIST(isc_refcount_current(&zone->erefs) == 0); + return (true); + } + return (false); +} + +static bool +zone_check_ns(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *version, + dns_name_t *name, bool logit) +{ + isc_result_t result; + char namebuf[DNS_NAME_FORMATSIZE]; + char altbuf[DNS_NAME_FORMATSIZE]; + dns_fixedname_t fixed; + dns_name_t *foundname; + int level; + + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_NOCHECKNS)) + return (true); + + if (zone->type == dns_zone_master) + level = ISC_LOG_ERROR; + else + level = ISC_LOG_WARNING; + + foundname = dns_fixedname_initname(&fixed); + + result = dns_db_find(db, name, version, dns_rdatatype_a, + 0, 0, NULL, foundname, NULL, NULL); + if (result == ISC_R_SUCCESS) + return (true); + + if (result == DNS_R_NXRRSET) { + result = dns_db_find(db, name, version, dns_rdatatype_aaaa, + 0, 0, NULL, foundname, NULL, NULL); + if (result == ISC_R_SUCCESS) + return (true); + } + + if (result == DNS_R_NXRRSET || result == DNS_R_NXDOMAIN || + result == DNS_R_EMPTYNAME) { + if (logit) { + dns_name_format(name, namebuf, sizeof namebuf); + dns_zone_log(zone, level, "NS '%s' has no address " + "records (A or AAAA)", namebuf); + } + return (false); + } + + if (result == DNS_R_CNAME) { + if (logit) { + dns_name_format(name, namebuf, sizeof namebuf); + dns_zone_log(zone, level, "NS '%s' is a CNAME " + "(illegal)", namebuf); + } + return (false); + } + + if (result == DNS_R_DNAME) { + if (logit) { + dns_name_format(name, namebuf, sizeof namebuf); + dns_name_format(foundname, altbuf, sizeof altbuf); + dns_zone_log(zone, level, "NS '%s' is below a DNAME " + "'%s' (illegal)", namebuf, altbuf); + } + return (false); + } + + return (true); +} + +static isc_result_t +zone_count_ns_rr(dns_zone_t *zone, dns_db_t *db, dns_dbnode_t *node, + dns_dbversion_t *version, unsigned int *nscount, + unsigned int *errors, bool logit) +{ + isc_result_t result; + unsigned int count = 0; + unsigned int ecount = 0; + dns_rdataset_t rdataset; + dns_rdata_t rdata; + dns_rdata_ns_t ns; + + dns_rdataset_init(&rdataset); + result = dns_db_findrdataset(db, node, version, dns_rdatatype_ns, + dns_rdatatype_none, 0, &rdataset, NULL); + if (result == ISC_R_NOTFOUND) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + goto success; + } + if (result != ISC_R_SUCCESS) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + goto invalidate_rdataset; + } + + result = dns_rdataset_first(&rdataset); + while (result == ISC_R_SUCCESS) { + if (errors != NULL && zone->rdclass == dns_rdataclass_in && + (zone->type == dns_zone_master || + zone->type == dns_zone_slave)) { + dns_rdata_init(&rdata); + dns_rdataset_current(&rdataset, &rdata); + result = dns_rdata_tostruct(&rdata, &ns, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + if (dns_name_issubdomain(&ns.name, &zone->origin) && + !zone_check_ns(zone, db, version, &ns.name, logit)) + ecount++; + } + count++; + result = dns_rdataset_next(&rdataset); + } + dns_rdataset_disassociate(&rdataset); + + success: + if (nscount != NULL) + *nscount = count; + if (errors != NULL) + *errors = ecount; + + result = ISC_R_SUCCESS; + + invalidate_rdataset: + dns_rdataset_invalidate(&rdataset); + + return (result); +} + +static isc_result_t +zone_load_soa_rr(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version, + unsigned int *soacount, + uint32_t *serial, uint32_t *refresh, + uint32_t *retry, uint32_t *expire, + uint32_t *minimum) +{ + isc_result_t result; + unsigned int count; + dns_rdataset_t rdataset; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdata_soa_t soa; + + dns_rdataset_init(&rdataset); + result = dns_db_findrdataset(db, node, version, dns_rdatatype_soa, + dns_rdatatype_none, 0, &rdataset, NULL); + if (result == ISC_R_NOTFOUND) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + if (soacount != NULL) + *soacount = 0; + if (serial != NULL) + *serial = 0; + if (refresh != NULL) + *refresh = 0; + if (retry != NULL) + *retry = 0; + if (expire != NULL) + *expire = 0; + if (minimum != NULL) + *minimum = 0; + result = ISC_R_SUCCESS; + goto invalidate_rdataset; + } + if (result != ISC_R_SUCCESS) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + goto invalidate_rdataset; + } + + count = 0; + result = dns_rdataset_first(&rdataset); + while (result == ISC_R_SUCCESS) { + dns_rdata_init(&rdata); + dns_rdataset_current(&rdataset, &rdata); + count++; + if (count == 1) { + result = dns_rdata_tostruct(&rdata, &soa, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + } + + result = dns_rdataset_next(&rdataset); + dns_rdata_reset(&rdata); + } + dns_rdataset_disassociate(&rdataset); + + if (soacount != NULL) + *soacount = count; + + if (count > 0) { + if (serial != NULL) + *serial = soa.serial; + if (refresh != NULL) + *refresh = soa.refresh; + if (retry != NULL) + *retry = soa.retry; + if (expire != NULL) + *expire = soa.expire; + if (minimum != NULL) + *minimum = soa.minimum; + } else { + if (soacount != NULL) + *soacount = 0; + if (serial != NULL) + *serial = 0; + if (refresh != NULL) + *refresh = 0; + if (retry != NULL) + *retry = 0; + if (expire != NULL) + *expire = 0; + if (minimum != NULL) + *minimum = 0; + } + + result = ISC_R_SUCCESS; + + invalidate_rdataset: + dns_rdataset_invalidate(&rdataset); + + return (result); +} + +/* + * zone must be locked. + */ +static isc_result_t +zone_get_from_db(dns_zone_t *zone, dns_db_t *db, unsigned int *nscount, + unsigned int *soacount, uint32_t *serial, + uint32_t *refresh, uint32_t *retry, + uint32_t *expire, uint32_t *minimum, + unsigned int *errors) +{ + isc_result_t result; + isc_result_t answer = ISC_R_SUCCESS; + dns_dbversion_t *version = NULL; + dns_dbnode_t *node; + + REQUIRE(db != NULL); + REQUIRE(zone != NULL); + + dns_db_currentversion(db, &version); + + if (nscount != NULL) + *nscount = 0; + if (soacount != NULL) + *soacount = 0; + if (serial != NULL) + *serial = 0; + if (refresh != NULL) + *refresh = 0; + if (retry != NULL) + *retry = 0; + if (expire != NULL) + *expire = 0; + if (errors != NULL) + *errors = 0; + + node = NULL; + result = dns_db_findnode(db, &zone->origin, false, &node); + if (result != ISC_R_SUCCESS) { + answer = result; + goto closeversion; + } + + if (nscount != NULL || errors != NULL) { + result = zone_count_ns_rr(zone, db, node, version, + nscount, errors, true); + if (result != ISC_R_SUCCESS) + answer = result; + } + + if (soacount != NULL || serial != NULL || refresh != NULL + || retry != NULL || expire != NULL || minimum != NULL) { + result = zone_load_soa_rr(db, node, version, soacount, + serial, refresh, retry, expire, + minimum); + if (result != ISC_R_SUCCESS) + answer = result; + } + + dns_db_detachnode(db, &node); + closeversion: + dns_db_closeversion(db, &version, false); + + return (answer); +} + +void +dns_zone_attach(dns_zone_t *source, dns_zone_t **target) { + REQUIRE(DNS_ZONE_VALID(source)); + REQUIRE(target != NULL && *target == NULL); + isc_refcount_increment(&source->erefs, NULL); + *target = source; +} + +void +dns_zone_detach(dns_zone_t **zonep) { + dns_zone_t *zone; + dns_zone_t *raw = NULL; + dns_zone_t *secure = NULL; + unsigned int refs; + bool free_now = false; + + REQUIRE(zonep != NULL && DNS_ZONE_VALID(*zonep)); + + zone = *zonep; + + isc_refcount_decrement(&zone->erefs, &refs); + + if (refs == 0) { + LOCK_ZONE(zone); + INSIST(zone != zone->raw); + /* + * We just detached the last external reference. + */ + if (zone->task != NULL) { + /* + * This zone is being managed. Post + * its control event and let it clean + * up synchronously in the context of + * its task. + */ + isc_event_t *ev = &zone->ctlevent; + isc_task_send(zone->task, &ev); + } else { + /* + * This zone is not being managed; it has + * no task and can have no outstanding + * events. Free it immediately. + */ + /* + * Unmanaged zones should not have non-null views; + * we have no way of detaching from the view here + * without causing deadlock because this code is called + * with the view already locked. + */ + INSIST(zone->view == NULL); + free_now = true; + raw = zone->raw; + zone->raw = NULL; + secure = zone->secure; + zone->secure = NULL; + } + UNLOCK_ZONE(zone); + } + *zonep = NULL; + if (free_now) { + if (raw != NULL) + dns_zone_detach(&raw); + if (secure != NULL) + dns_zone_idetach(&secure); + zone_free(zone); + } +} + +void +dns_zone_iattach(dns_zone_t *source, dns_zone_t **target) { + REQUIRE(DNS_ZONE_VALID(source)); + REQUIRE(target != NULL && *target == NULL); + LOCK_ZONE(source); + zone_iattach(source, target); + UNLOCK_ZONE(source); +} + +static void +zone_iattach(dns_zone_t *source, dns_zone_t **target) { + + /* + * 'source' locked by caller. + */ + REQUIRE(LOCKED_ZONE(source)); + REQUIRE(DNS_ZONE_VALID(source)); + REQUIRE(target != NULL && *target == NULL); + INSIST(source->irefs + isc_refcount_current(&source->erefs) > 0); + source->irefs++; + INSIST(source->irefs != 0); + *target = source; +} + +static void +zone_idetach(dns_zone_t **zonep) { + dns_zone_t *zone; + + /* + * 'zone' locked by caller. + */ + REQUIRE(zonep != NULL && DNS_ZONE_VALID(*zonep)); + zone = *zonep; + REQUIRE(LOCKED_ZONE(*zonep)); + *zonep = NULL; + + INSIST(zone->irefs > 0); + zone->irefs--; + INSIST(zone->irefs + isc_refcount_current(&zone->erefs) > 0); +} + +void +dns_zone_idetach(dns_zone_t **zonep) { + dns_zone_t *zone; + bool free_needed; + + REQUIRE(zonep != NULL && DNS_ZONE_VALID(*zonep)); + zone = *zonep; + *zonep = NULL; + + LOCK_ZONE(zone); + INSIST(zone->irefs > 0); + zone->irefs--; + free_needed = exit_check(zone); + UNLOCK_ZONE(zone); + if (free_needed) + zone_free(zone); +} + +isc_mem_t * +dns_zone_getmctx(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->mctx); +} + +dns_zonemgr_t * +dns_zone_getmgr(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->zmgr); +} + +void +dns_zone_setflag(dns_zone_t *zone, unsigned int flags, bool value) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (value) + DNS_ZONE_SETFLAG(zone, flags); + else + DNS_ZONE_CLRFLAG(zone, flags); + UNLOCK_ZONE(zone); +} + +void +dns_zone_setoption(dns_zone_t *zone, unsigned int option, + bool value) +{ + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (value) + zone->options |= option; + else + zone->options &= ~option; + UNLOCK_ZONE(zone); +} + +void +dns_zone_setoption2(dns_zone_t *zone, unsigned int option, + bool value) +{ + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (value) + zone->options2 |= option; + else + zone->options2 &= ~option; + UNLOCK_ZONE(zone); +} + +unsigned int +dns_zone_getoptions(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->options); +} + +unsigned int +dns_zone_getoptions2(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->options2); +} + +void +dns_zone_setkeyopt(dns_zone_t *zone, unsigned int keyopt, bool value) +{ + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (value) + zone->keyopts |= keyopt; + else + zone->keyopts &= ~keyopt; + UNLOCK_ZONE(zone); +} + +unsigned int +dns_zone_getkeyopts(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->keyopts); +} + +isc_result_t +dns_zone_setxfrsource4(dns_zone_t *zone, const isc_sockaddr_t *xfrsource) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->xfrsource4 = *xfrsource; + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); +} + +isc_sockaddr_t * +dns_zone_getxfrsource4(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (&zone->xfrsource4); +} + +isc_result_t +dns_zone_setxfrsource4dscp(dns_zone_t *zone, isc_dscp_t dscp) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->xfrsource4dscp = dscp; + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); +} + +isc_dscp_t +dns_zone_getxfrsource4dscp(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->xfrsource4dscp); +} + +isc_result_t +dns_zone_setxfrsource6(dns_zone_t *zone, const isc_sockaddr_t *xfrsource) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->xfrsource6 = *xfrsource; + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); +} + +isc_sockaddr_t * +dns_zone_getxfrsource6(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (&zone->xfrsource6); +} + +isc_dscp_t +dns_zone_getxfrsource6dscp(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->xfrsource6dscp); +} + +isc_result_t +dns_zone_setxfrsource6dscp(dns_zone_t *zone, isc_dscp_t dscp) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->xfrsource6dscp = dscp; + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_zone_setaltxfrsource4(dns_zone_t *zone, + const isc_sockaddr_t *altxfrsource) +{ + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->altxfrsource4 = *altxfrsource; + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); +} + +isc_sockaddr_t * +dns_zone_getaltxfrsource4(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (&zone->altxfrsource4); +} + +isc_result_t +dns_zone_setaltxfrsource4dscp(dns_zone_t *zone, isc_dscp_t dscp) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->altxfrsource4dscp = dscp; + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); +} + +isc_dscp_t +dns_zone_getaltxfrsource4dscp(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->altxfrsource4dscp); +} + +isc_result_t +dns_zone_setaltxfrsource6(dns_zone_t *zone, + const isc_sockaddr_t *altxfrsource) +{ + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->altxfrsource6 = *altxfrsource; + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); +} + +isc_sockaddr_t * +dns_zone_getaltxfrsource6(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (&zone->altxfrsource6); +} + +isc_result_t +dns_zone_setaltxfrsource6dscp(dns_zone_t *zone, isc_dscp_t dscp) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->altxfrsource6dscp = dscp; + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); +} + +isc_dscp_t +dns_zone_getaltxfrsource6dscp(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->altxfrsource6dscp); +} + +isc_result_t +dns_zone_setnotifysrc4(dns_zone_t *zone, const isc_sockaddr_t *notifysrc) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->notifysrc4 = *notifysrc; + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); +} + +isc_sockaddr_t * +dns_zone_getnotifysrc4(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (&zone->notifysrc4); +} + +isc_result_t +dns_zone_setnotifysrc4dscp(dns_zone_t *zone, isc_dscp_t dscp) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->notifysrc4dscp = dscp; + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); +} + +isc_dscp_t +dns_zone_getnotifysrc4dscp(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->notifysrc4dscp); +} + +isc_result_t +dns_zone_setnotifysrc6(dns_zone_t *zone, const isc_sockaddr_t *notifysrc) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->notifysrc6 = *notifysrc; + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); +} + +isc_sockaddr_t * +dns_zone_getnotifysrc6(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (&zone->notifysrc6); +} + +static bool +same_addrs(isc_sockaddr_t const *oldlist, isc_sockaddr_t const *newlist, + uint32_t count) +{ + unsigned int i; + + for (i = 0; i < count; i++) + if (!isc_sockaddr_equal(&oldlist[i], &newlist[i])) + return (false); + return (true); +} + +static bool +same_keynames(dns_name_t * const *oldlist, dns_name_t * const *newlist, + uint32_t count) +{ + unsigned int i; + + if (oldlist == NULL && newlist == NULL) + return (true); + if (oldlist == NULL || newlist == NULL) + return (false); + + for (i = 0; i < count; i++) { + if (oldlist[i] == NULL && newlist[i] == NULL) + continue; + if (oldlist[i] == NULL || newlist[i] == NULL || + !dns_name_equal(oldlist[i], newlist[i])) + return (false); + } + return (true); +} + +static void +clear_addresskeylist(isc_sockaddr_t **addrsp, isc_dscp_t **dscpsp, + dns_name_t ***keynamesp, unsigned int *countp, + isc_mem_t *mctx) +{ + unsigned int count; + isc_sockaddr_t *addrs; + isc_dscp_t *dscps; + dns_name_t **keynames; + + REQUIRE(countp != NULL && addrsp != NULL && dscpsp != NULL && + keynamesp != NULL); + + count = *countp; + *countp = 0; + addrs = *addrsp; + *addrsp = NULL; + dscps = *dscpsp; + *dscpsp = NULL; + keynames = *keynamesp; + *keynamesp = NULL; + + if (addrs != NULL) + isc_mem_put(mctx, addrs, count * sizeof(isc_sockaddr_t)); + + if (dscps != NULL) + isc_mem_put(mctx, dscps, count * sizeof(isc_dscp_t)); + + if (keynames != NULL) { + unsigned int i; + for (i = 0; i < count; i++) { + if (keynames[i] != NULL) { + dns_name_free(keynames[i], mctx); + isc_mem_put(mctx, keynames[i], + sizeof(dns_name_t)); + keynames[i] = NULL; + } + } + isc_mem_put(mctx, keynames, count * sizeof(dns_name_t *)); + } +} + +static isc_result_t +set_addrkeylist(unsigned int count, + const isc_sockaddr_t *addrs, isc_sockaddr_t **newaddrsp, + const isc_dscp_t *dscp, isc_dscp_t **newdscpp, + dns_name_t **names, dns_name_t ***newnamesp, + isc_mem_t *mctx) +{ + isc_result_t result; + isc_sockaddr_t *newaddrs = NULL; + isc_dscp_t *newdscp = NULL; + dns_name_t **newnames = NULL; + unsigned int i; + + REQUIRE(newaddrsp != NULL && *newaddrsp == NULL); + REQUIRE(newdscpp != NULL && *newdscpp == NULL); + REQUIRE(newnamesp != NULL && *newnamesp == NULL); + + newaddrs = isc_mem_get(mctx, count * sizeof(*newaddrs)); + if (newaddrs == NULL) + return (ISC_R_NOMEMORY); + memmove(newaddrs, addrs, count * sizeof(*newaddrs)); + + if (dscp != NULL) { + newdscp = isc_mem_get(mctx, count * sizeof(*newdscp)); + if (newdscp == NULL) { + isc_mem_put(mctx, newaddrs, count * sizeof(*newaddrs)); + return (ISC_R_NOMEMORY); + } + memmove(newdscp, dscp, count * sizeof(*newdscp)); + } else + newdscp = NULL; + + if (names != NULL) { + newnames = isc_mem_get(mctx, count * sizeof(*newnames)); + if (newnames == NULL) { + if (newdscp != NULL) + isc_mem_put(mctx, newdscp, + count * sizeof(*newdscp)); + isc_mem_put(mctx, newaddrs, count * sizeof(*newaddrs)); + return (ISC_R_NOMEMORY); + } + for (i = 0; i < count; i++) + newnames[i] = NULL; + for (i = 0; i < count; i++) { + if (names[i] != NULL) { + newnames[i] = isc_mem_get(mctx, + sizeof(dns_name_t)); + if (newnames[i] == NULL) + goto allocfail; + dns_name_init(newnames[i], NULL); + result = dns_name_dup(names[i], mctx, + newnames[i]); + if (result != ISC_R_SUCCESS) { + allocfail: + for (i = 0; i < count; i++) + if (newnames[i] != NULL) + dns_name_free( + newnames[i], + mctx); + isc_mem_put(mctx, newaddrs, + count * sizeof(*newaddrs)); + isc_mem_put(mctx, newdscp, + count * sizeof(*newdscp)); + isc_mem_put(mctx, newnames, + count * sizeof(*newnames)); + return (ISC_R_NOMEMORY); + } + } + } + } else + newnames = NULL; + + *newdscpp = newdscp; + *newaddrsp = newaddrs; + *newnamesp = newnames; + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_zone_setnotifysrc6dscp(dns_zone_t *zone, isc_dscp_t dscp) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->notifysrc6dscp = dscp; + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); +} + +isc_dscp_t +dns_zone_getnotifysrc6dscp(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->notifysrc6dscp); +} + +isc_result_t +dns_zone_setalsonotify(dns_zone_t *zone, const isc_sockaddr_t *notify, + uint32_t count) +{ + return (dns_zone_setalsonotifydscpkeys(zone, notify, NULL, NULL, + count)); +} + +isc_result_t +dns_zone_setalsonotifywithkeys(dns_zone_t *zone, const isc_sockaddr_t *notify, + dns_name_t **keynames, uint32_t count) +{ + return (dns_zone_setalsonotifydscpkeys(zone, notify, NULL, keynames, + count)); +} + +isc_result_t +dns_zone_setalsonotifydscpkeys(dns_zone_t *zone, const isc_sockaddr_t *notify, + const isc_dscp_t *dscps, dns_name_t **keynames, + uint32_t count) +{ + isc_result_t result; + isc_sockaddr_t *newaddrs = NULL; + isc_dscp_t *newdscps = NULL; + dns_name_t **newnames = NULL; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(count == 0 || notify != NULL); + if (keynames != NULL) + REQUIRE(count != 0); + + LOCK_ZONE(zone); + + if (count == zone->notifycnt && + same_addrs(zone->notify, notify, count) && + same_keynames(zone->notifykeynames, keynames, count)) + goto unlock; + + clear_addresskeylist(&zone->notify, &zone->notifydscp, + &zone->notifykeynames, &zone->notifycnt, + zone->mctx); + + if (count == 0) + goto unlock; + + /* + * Set up the notify and notifykey lists + */ + result = set_addrkeylist(count, notify, &newaddrs, dscps, &newdscps, + keynames, &newnames, zone->mctx); + if (result != ISC_R_SUCCESS) + goto unlock; + + /* + * Everything is ok so attach to the zone. + */ + zone->notify = newaddrs; + zone->notifydscp = newdscps; + zone->notifykeynames = newnames; + zone->notifycnt = count; + unlock: + UNLOCK_ZONE(zone); + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_zone_setmasters(dns_zone_t *zone, const isc_sockaddr_t *masters, + uint32_t count) +{ + isc_result_t result; + + result = dns_zone_setmasterswithkeys(zone, masters, NULL, count); + return (result); +} + +isc_result_t +dns_zone_setmasterswithkeys(dns_zone_t *zone, + const isc_sockaddr_t *masters, + dns_name_t **keynames, + uint32_t count) +{ + isc_result_t result = ISC_R_SUCCESS; + isc_sockaddr_t *newaddrs = NULL; + isc_dscp_t *newdscps = NULL; + dns_name_t **newnames = NULL; + bool *newok; + unsigned int i; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(count == 0 || masters != NULL); + if (keynames != NULL) { + REQUIRE(count != 0); + } + + LOCK_ZONE(zone); + /* + * The refresh code assumes that 'masters' wouldn't change under it. + * If it will change then kill off any current refresh in progress + * and update the masters info. If it won't change then we can just + * unlock and exit. + */ + if (count != zone->masterscnt || + !same_addrs(zone->masters, masters, count) || + !same_keynames(zone->masterkeynames, keynames, count)) { + if (zone->request != NULL) + dns_request_cancel(zone->request); + } else + goto unlock; + + /* + * This needs to happen before clear_addresskeylist() sets + * zone->masterscnt to 0: + */ + if (zone->mastersok != NULL) { + isc_mem_put(zone->mctx, zone->mastersok, + zone->masterscnt * sizeof(bool)); + zone->mastersok = NULL; + } + clear_addresskeylist(&zone->masters, &zone->masterdscps, + &zone->masterkeynames, &zone->masterscnt, + zone->mctx); + /* + * If count == 0, don't allocate any space for masters, mastersok or + * keynames so internally, those pointers are NULL if count == 0 + */ + if (count == 0) + goto unlock; + + /* + * mastersok must contain count elements + */ + newok = isc_mem_get(zone->mctx, count * sizeof(*newok)); + if (newok == NULL) { + result = ISC_R_NOMEMORY; + isc_mem_put(zone->mctx, newaddrs, count * sizeof(*newaddrs)); + goto unlock; + }; + for (i = 0; i < count; i++) + newok[i] = false; + + /* + * Now set up the masters and masterkey lists + */ + result = set_addrkeylist(count, masters, &newaddrs, NULL, &newdscps, + keynames, &newnames, zone->mctx); + INSIST(newdscps == NULL); + if (result != ISC_R_SUCCESS) { + isc_mem_put(zone->mctx, newok, count * sizeof(*newok)); + goto unlock; + } + + /* + * Everything is ok so attach to the zone. + */ + zone->curmaster = 0; + zone->mastersok = newok; + zone->masters = newaddrs; + zone->masterdscps = newdscps; + zone->masterkeynames = newnames; + zone->masterscnt = count; + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NOMASTERS); + + unlock: + UNLOCK_ZONE(zone); + return (result); +} + +isc_result_t +dns_zone_getdb(dns_zone_t *zone, dns_db_t **dpb) { + isc_result_t result = ISC_R_SUCCESS; + + REQUIRE(DNS_ZONE_VALID(zone)); + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db == NULL) + result = DNS_R_NOTLOADED; + else + dns_db_attach(zone->db, dpb); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + + return (result); +} + +void +dns_zone_setdb(dns_zone_t *zone, dns_db_t *db) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(zone->type == dns_zone_staticstub); + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write); + REQUIRE(zone->db == NULL); + dns_db_attach(db, &zone->db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write); +} + +/* + * Co-ordinates the starting of routine jobs. + */ +void +dns_zone_maintenance(dns_zone_t *zone) { + const char me[] = "dns_zone_maintenance"; + isc_time_t now; + + REQUIRE(DNS_ZONE_VALID(zone)); + ENTER; + + LOCK_ZONE(zone); + TIME_NOW(&now); + zone_settimer(zone, &now); + UNLOCK_ZONE(zone); +} + +static inline bool +was_dumping(dns_zone_t *zone) { + bool dumping; + + REQUIRE(LOCKED_ZONE(zone)); + + dumping = DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DUMPING); + if (!dumping) { + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDDUMP); + isc_time_settoepoch(&zone->dumptime); + } + return (dumping); +} + +/*% + * Find up to 'maxkeys' DNSSEC keys used for signing version 'ver' of database + * 'db' for zone 'zone' in its key directory, then load these keys into 'keys'. + * Only load the public part of a given key if it is not active at timestamp + * 'now'. Store the number of keys found in 'nkeys'. + */ +isc_result_t +dns__zone_findkeys(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver, + isc_stdtime_t now, isc_mem_t *mctx, unsigned int maxkeys, + dst_key_t **keys, unsigned int *nkeys) +{ + isc_result_t result; + dns_dbnode_t *node = NULL; + const char *directory = dns_zone_getkeydirectory(zone); + + CHECK(dns_db_findnode(db, dns_db_origin(db), false, &node)); + memset(keys, 0, sizeof(*keys) * maxkeys); + result = dns_dnssec_findzonekeys3(db, ver, node, dns_db_origin(db), + directory, now, mctx, maxkeys, keys, + nkeys); + if (result == ISC_R_NOTFOUND) + result = ISC_R_SUCCESS; + failure: + if (node != NULL) + dns_db_detachnode(db, &node); + return (result); +} + +static isc_result_t +offline(dns_db_t *db, dns_dbversion_t *ver, dns__zonediff_t *zonediff, + dns_name_t *name, dns_ttl_t ttl, dns_rdata_t *rdata) +{ + isc_result_t result; + + if ((rdata->flags & DNS_RDATA_OFFLINE) != 0) + return (ISC_R_SUCCESS); + result = update_one_rr(db, ver, zonediff->diff, DNS_DIFFOP_DELRESIGN, + name, ttl, rdata); + if (result != ISC_R_SUCCESS) + return (result); + rdata->flags |= DNS_RDATA_OFFLINE; + result = update_one_rr(db, ver, zonediff->diff, DNS_DIFFOP_ADDRESIGN, + name, ttl, rdata); + zonediff->offline = true; + return (result); +} + +static void +set_key_expiry_warning(dns_zone_t *zone, isc_stdtime_t when, isc_stdtime_t now) +{ + unsigned int delta; + char timebuf[80]; + + zone->key_expiry = when; + if (when <= now) { + dns_zone_log(zone, ISC_LOG_ERROR, + "DNSKEY RRSIG(s) have expired"); + isc_time_settoepoch(&zone->keywarntime); + } else if (when < now + 7 * 24 * 3600) { + isc_time_t t; + isc_time_set(&t, when, 0); + isc_time_formattimestamp(&t, timebuf, 80); + dns_zone_log(zone, ISC_LOG_WARNING, + "DNSKEY RRSIG(s) will expire within 7 days: %s", + timebuf); + delta = when - now; + delta--; /* loop prevention */ + delta /= 24 * 3600; /* to whole days */ + delta *= 24 * 3600; /* to seconds */ + isc_time_set(&zone->keywarntime, when - delta, 0); + } else { + isc_time_set(&zone->keywarntime, when - 7 * 24 * 3600, 0); + isc_time_formattimestamp(&zone->keywarntime, timebuf, 80); + dns_zone_log(zone, ISC_LOG_NOTICE, + "setting keywarntime to %s", timebuf); + } +} + +/* + * Helper function to del_sigs(). We don't want to delete RRSIGs that + * have no new key. + */ +static bool +delsig_ok(dns_rdata_rrsig_t *rrsig_ptr, dst_key_t **keys, unsigned int nkeys, + bool *warn) +{ + unsigned int i = 0; + bool have_ksk = false, have_zsk = false; + bool have_pksk = false, have_pzsk = false; + + for (i = 0; i < nkeys; i++) { + if (rrsig_ptr->algorithm != dst_key_alg(keys[i])) + continue; + if (dst_key_isprivate(keys[i])) { + if (KSK(keys[i])) + have_ksk = have_pksk = true; + else + have_zsk = have_pzsk = true; + } else { + if (KSK(keys[i])) + have_ksk = true; + else + have_zsk = true; + } + } + + if (have_zsk && have_ksk && !have_pzsk) + *warn = true; + + /* + * It's okay to delete a signature if there is an active key + * with the same algorithm to replace it. + */ + if (have_pksk || have_pzsk) + return (true); + + /* + * Failing that, it is *not* okay to delete a signature + * if the associated public key is still in the DNSKEY RRset + */ + for (i = 0; i < nkeys; i++) { + if ((rrsig_ptr->algorithm == dst_key_alg(keys[i])) && + (rrsig_ptr->keyid == dst_key_id(keys[i]))) + return (false); + } + + /* + * But if the key is gone, then go ahead. + */ + return (true); +} + +/* + * Delete expired RRsigs and any RRsigs we are about to re-sign. + * See also update.c:del_keysigs(). + */ +static isc_result_t +del_sigs(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver, dns_name_t *name, + dns_rdatatype_t type, dns__zonediff_t *zonediff, dst_key_t **keys, + unsigned int nkeys, isc_stdtime_t now, bool incremental) +{ + isc_result_t result; + dns_dbnode_t *node = NULL; + dns_rdataset_t rdataset; + unsigned int i; + dns_rdata_rrsig_t rrsig; + bool found; + int64_t timewarn = 0, timemaybe = 0; + + dns_rdataset_init(&rdataset); + + if (type == dns_rdatatype_nsec3) + result = dns_db_findnsec3node(db, name, false, &node); + else + result = dns_db_findnode(db, name, false, &node); + if (result == ISC_R_NOTFOUND) + return (ISC_R_SUCCESS); + if (result != ISC_R_SUCCESS) + goto failure; + result = dns_db_findrdataset(db, node, ver, dns_rdatatype_rrsig, type, + (isc_stdtime_t) 0, &rdataset, NULL); + dns_db_detachnode(db, &node); + + if (result == ISC_R_NOTFOUND) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + return (ISC_R_SUCCESS); + } + if (result != ISC_R_SUCCESS) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + goto failure; + } + + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) { + dns_rdata_t rdata = DNS_RDATA_INIT; + + dns_rdataset_current(&rdataset, &rdata); + result = dns_rdata_tostruct(&rdata, &rrsig, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + if (type != dns_rdatatype_dnskey) { + bool warn = false, deleted = false; + if (delsig_ok(&rrsig, keys, nkeys, &warn)) { + result = update_one_rr(db, ver, zonediff->diff, + DNS_DIFFOP_DELRESIGN, name, + rdataset.ttl, &rdata); + if (result != ISC_R_SUCCESS) + break; + deleted = true; + } + if (warn) { + /* + * At this point, we've got an RRSIG, + * which is signed by an inactive key. + * An administrator needs to provide a new + * key/alg, but until that time, we want to + * keep the old RRSIG. Marking the key as + * offline will prevent us spinning waiting + * for the private part. + */ + if (incremental && !deleted) { + result = offline(db, ver, zonediff, + name, rdataset.ttl, + &rdata); + if (result != ISC_R_SUCCESS) + break; + } + + /* + * Log the key id and algorithm of + * the inactive key with no replacement + */ + if (zone->log_key_expired_timer <= now) { + char origin[DNS_NAME_FORMATSIZE]; + char algbuf[DNS_NAME_FORMATSIZE]; + dns_name_format(&zone->origin, origin, + sizeof(origin)); + dns_secalg_format(rrsig.algorithm, + algbuf, + sizeof(algbuf)); + dns_zone_log(zone, ISC_LOG_WARNING, + "Key %s/%s/%d " + "missing or inactive " + "and has no replacement: " + "retaining signatures.", + origin, algbuf, + rrsig.keyid); + zone->log_key_expired_timer = now + + 3600; + } + } + continue; + } + + /* + * RRSIG(DNSKEY) requires special processing. + */ + found = false; + for (i = 0; i < nkeys; i++) { + if (rrsig.algorithm == dst_key_alg(keys[i]) && + rrsig.keyid == dst_key_id(keys[i])) { + found = true; + /* + * Mark offline RRSIG(DNSKEY). + * We want the earliest offline expire time + * iff there is a new offline signature. + */ + if (!dst_key_inactive(keys[i]) && + !dst_key_isprivate(keys[i])) + { + int64_t timeexpire = + dns_time64_from32(rrsig.timeexpire); + if (timewarn != 0 && + timewarn > timeexpire) + timewarn = timeexpire; + if (rdata.flags & DNS_RDATA_OFFLINE) { + if (timemaybe == 0 || + timemaybe > timeexpire) + timemaybe = timeexpire; + break; + } + if (timewarn == 0) + timewarn = timemaybe; + if (timewarn == 0 || + timewarn > timeexpire) + timewarn = timeexpire; + result = offline(db, ver, zonediff, + name, rdataset.ttl, + &rdata); + break; + } + result = update_one_rr(db, ver, zonediff->diff, + DNS_DIFFOP_DELRESIGN, + name, rdataset.ttl, + &rdata); + break; + } + } + + /* + * If there is not a matching DNSKEY then + * delete the RRSIG. + */ + if (!found) + result = update_one_rr(db, ver, zonediff->diff, + DNS_DIFFOP_DELRESIGN, name, + rdataset.ttl, &rdata); + if (result != ISC_R_SUCCESS) + break; + } + + dns_rdataset_disassociate(&rdataset); + if (result == ISC_R_NOMORE) + result = ISC_R_SUCCESS; + if (timewarn > 0) { +#if defined(STDTIME_ON_32BITS) + isc_stdtime_t stdwarn = (isc_stdtime_t)timewarn; + if (timewarn == stdwarn) +#endif + set_key_expiry_warning(zone, (isc_stdtime_t)timewarn, + now); +#if defined(STDTIME_ON_32BITS) + else + dns_zone_log(zone, ISC_LOG_ERROR, + "key expiry warning time out of range"); +#endif + } + failure: + if (node != NULL) + dns_db_detachnode(db, &node); + return (result); +} + +static isc_result_t +add_sigs(dns_db_t *db, dns_dbversion_t *ver, dns_name_t *name, + dns_rdatatype_t type, dns_diff_t *diff, dst_key_t **keys, + unsigned int nkeys, isc_mem_t *mctx, isc_stdtime_t inception, + isc_stdtime_t expire, bool check_ksk, + bool keyset_kskonly) +{ + isc_result_t result; + dns_dbnode_t *node = NULL; + dns_rdataset_t rdataset; + dns_rdata_t sig_rdata = DNS_RDATA_INIT; + unsigned char data[1024]; /* XXX */ + isc_buffer_t buffer; + unsigned int i, j; + + dns_rdataset_init(&rdataset); + isc_buffer_init(&buffer, data, sizeof(data)); + + if (type == dns_rdatatype_nsec3) + result = dns_db_findnsec3node(db, name, false, &node); + else + result = dns_db_findnode(db, name, false, &node); + if (result == ISC_R_NOTFOUND) + return (ISC_R_SUCCESS); + if (result != ISC_R_SUCCESS) + goto failure; + result = dns_db_findrdataset(db, node, ver, type, 0, + (isc_stdtime_t) 0, &rdataset, NULL); + dns_db_detachnode(db, &node); + if (result == ISC_R_NOTFOUND) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + return (ISC_R_SUCCESS); + } + if (result != ISC_R_SUCCESS) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + goto failure; + } + + for (i = 0; i < nkeys; i++) { + bool both = false; + + if (!dst_key_isprivate(keys[i])) + continue; + if (dst_key_inactive(keys[i])) /* Should be redundant. */ + continue; + + if (check_ksk && !REVOKE(keys[i])) { + bool have_ksk, have_nonksk; + if (KSK(keys[i])) { + have_ksk = true; + have_nonksk = false; + } else { + have_ksk = false; + have_nonksk = true; + } + for (j = 0; j < nkeys; j++) { + if (j == i || ALG(keys[i]) != ALG(keys[j])) + continue; + if (!dst_key_isprivate(keys[j])) + continue; + if (dst_key_inactive(keys[j])) /* SBR */ + continue; + if (REVOKE(keys[j])) + continue; + if (KSK(keys[j])) + have_ksk = true; + else + have_nonksk = true; + both = have_ksk && have_nonksk; + if (both) + break; + } + } + if (both) { + if (type == dns_rdatatype_dnskey) { + if (!KSK(keys[i]) && keyset_kskonly) + continue; + } else if (KSK(keys[i])) + continue; + } else if (REVOKE(keys[i]) && type != dns_rdatatype_dnskey) + continue; + + /* Calculate the signature, creating a RRSIG RDATA. */ + isc_buffer_clear(&buffer); + CHECK(dns_dnssec_sign(name, &rdataset, keys[i], + &inception, &expire, + mctx, &buffer, &sig_rdata)); + /* Update the database and journal with the RRSIG. */ + /* XXX inefficient - will cause dataset merging */ + CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_ADDRESIGN, + name, rdataset.ttl, &sig_rdata)); + dns_rdata_reset(&sig_rdata); + isc_buffer_init(&buffer, data, sizeof(data)); + } + + failure: + if (dns_rdataset_isassociated(&rdataset)) + dns_rdataset_disassociate(&rdataset); + if (node != NULL) + dns_db_detachnode(db, &node); + return (result); +} + +static void +zone_resigninc(dns_zone_t *zone) { + const char *me = "zone_resigninc"; + dns_db_t *db = NULL; + dns_dbversion_t *version = NULL; + dns_diff_t _sig_diff; + dns__zonediff_t zonediff; + dns_fixedname_t fixed; + dns_name_t *name; + dns_rdataset_t rdataset; + dns_rdatatype_t covers; + dst_key_t *zone_keys[DNS_MAXZONEKEYS]; + bool check_ksk, keyset_kskonly = false; + isc_result_t result; + isc_stdtime_t now, inception, soaexpire, expire, stop; + uint32_t jitter, sigvalidityinterval; + unsigned int i; + unsigned int nkeys = 0; + unsigned int resign; + + ENTER; + + dns_rdataset_init(&rdataset); + dns_diff_init(zone->mctx, &_sig_diff); + zonediff_init(&zonediff, &_sig_diff); + + /* + * Zone is frozen or automatic resigning is disabled. + * Pause for 5 minutes. + */ + if (zone->update_disabled || + DNS_ZONEKEY_OPTION(zone, DNS_ZONEKEY_NORESIGN)) + { + result = ISC_R_FAILURE; + goto failure; + } + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + dns_db_attach(zone->db, &db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + + result = dns_db_newversion(db, &version); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_resigninc:dns_db_newversion -> %s", + dns_result_totext(result)); + goto failure; + } + + isc_stdtime_get(&now); + + result = dns__zone_findkeys(zone, db, version, now, zone->mctx, + DNS_MAXZONEKEYS, zone_keys, &nkeys); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_resigninc:dns__zone_findkeys -> %s", + dns_result_totext(result)); + goto failure; + } + + sigvalidityinterval = zone->sigvalidityinterval; + inception = now - 3600; /* Allow for clock skew. */ + soaexpire = now + sigvalidityinterval; + /* + * Spread out signatures over time if they happen to be + * clumped. We don't do this for each add_sigs() call as + * we still want some clustering to occur. + */ + if (sigvalidityinterval >= 3600U) { + isc_random_get(&jitter); + if (sigvalidityinterval > 7200U) { + jitter %= 3600; + } else { + jitter %= 1200; + } + expire = soaexpire - jitter - 1; + } else { + expire = soaexpire - 1; + } + stop = now + 5; + + check_ksk = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_UPDATECHECKKSK); + keyset_kskonly = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_DNSKEYKSKONLY); + + name = dns_fixedname_initname(&fixed); + result = dns_db_getsigningtime(db, &rdataset, name); + if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_resigninc:dns_db_getsigningtime -> %s", + dns_result_totext(result)); + } + + i = 0; + while (result == ISC_R_SUCCESS) { + resign = rdataset.resign - zone->sigresigninginterval; + covers = rdataset.covers; + dns_rdataset_disassociate(&rdataset); + + /* + * Stop if we hit the SOA as that means we have walked the + * entire zone. The SOA record should always be the most + * recent signature. + */ + /* XXXMPA increase number of RRsets signed pre call */ + if (covers == dns_rdatatype_soa || i++ > zone->signatures || + resign > stop) + break; + + result = del_sigs(zone, db, version, name, covers, &zonediff, + zone_keys, nkeys, now, true); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_resigninc:del_sigs -> %s", + dns_result_totext(result)); + break; + } + + result = add_sigs(db, version, name, covers, zonediff.diff, + zone_keys, nkeys, zone->mctx, inception, + expire, check_ksk, keyset_kskonly); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_resigninc:add_sigs -> %s", + dns_result_totext(result)); + break; + } + result = dns_db_getsigningtime(db, &rdataset, name); + if (nkeys == 0 && result == ISC_R_NOTFOUND) { + result = ISC_R_SUCCESS; + break; + } + if (result != ISC_R_SUCCESS) + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_resigninc:dns_db_getsigningtime -> %s", + dns_result_totext(result)); + } + + if (result != ISC_R_NOMORE && result != ISC_R_SUCCESS) + goto failure; + + result = del_sigs(zone, db, version, &zone->origin, dns_rdatatype_soa, + &zonediff, zone_keys, nkeys, now, true); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_resigninc:del_sigs -> %s", + dns_result_totext(result)); + goto failure; + } + + /* + * Did we change anything in the zone? + */ + if (ISC_LIST_EMPTY(zonediff.diff->tuples)) { + /* + * Commit the changes if any key has been marked as offline. + */ + if (zonediff.offline) + dns_db_closeversion(db, &version, true); + goto failure; + } + + /* Increment SOA serial if we have made changes */ + result = update_soa_serial(db, version, zonediff.diff, zone->mctx, + zone->updatemethod); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_resigninc:update_soa_serial -> %s", + dns_result_totext(result)); + goto failure; + } + + /* + * Generate maximum life time signatures so that the above loop + * termination is sensible. + */ + result = add_sigs(db, version, &zone->origin, dns_rdatatype_soa, + zonediff.diff, zone_keys, nkeys, zone->mctx, + inception, soaexpire, check_ksk, keyset_kskonly); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_resigninc:add_sigs -> %s", + dns_result_totext(result)); + goto failure; + } + + /* Write changes to journal file. */ + CHECK(zone_journal(zone, zonediff.diff, NULL, "zone_resigninc")); + + /* Everything has succeeded. Commit the changes. */ + dns_db_closeversion(db, &version, true); + + failure: + dns_diff_clear(&_sig_diff); + for (i = 0; i < nkeys; i++) + dst_key_free(&zone_keys[i]); + if (version != NULL) { + dns_db_closeversion(db, &version, false); + dns_db_detach(&db); + } else if (db != NULL) + dns_db_detach(&db); + if (result == ISC_R_SUCCESS) { + set_resigntime(zone); + LOCK_ZONE(zone); + zone_needdump(zone, DNS_DUMP_DELAY); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY); + UNLOCK_ZONE(zone); + } else { + /* + * Something failed. Retry in 5 minutes. + */ + isc_interval_t ival; + isc_interval_set(&ival, 300, 0); + isc_time_nowplusinterval(&zone->resigntime, &ival); + } + + INSIST(version == NULL); +} + +static isc_result_t +next_active(dns_db_t *db, dns_dbversion_t *version, dns_name_t *oldname, + dns_name_t *newname, bool bottom) +{ + isc_result_t result; + dns_dbiterator_t *dbit = NULL; + dns_rdatasetiter_t *rdsit = NULL; + dns_dbnode_t *node = NULL; + + CHECK(dns_db_createiterator(db, DNS_DB_NONSEC3, &dbit)); + CHECK(dns_dbiterator_seek(dbit, oldname)); + do { + result = dns_dbiterator_next(dbit); + if (result == ISC_R_NOMORE) + CHECK(dns_dbiterator_first(dbit)); + CHECK(dns_dbiterator_current(dbit, &node, newname)); + if (bottom && dns_name_issubdomain(newname, oldname) && + !dns_name_equal(newname, oldname)) { + dns_db_detachnode(db, &node); + continue; + } + /* + * Is this node empty? + */ + CHECK(dns_db_allrdatasets(db, node, version, 0, &rdsit)); + result = dns_rdatasetiter_first(rdsit); + dns_db_detachnode(db, &node); + dns_rdatasetiter_destroy(&rdsit); + if (result != ISC_R_NOMORE) + break; + } while (1); + failure: + if (node != NULL) + dns_db_detachnode(db, &node); + if (dbit != NULL) + dns_dbiterator_destroy(&dbit); + return (result); +} + +static bool +signed_with_key(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version, + dns_rdatatype_t type, dst_key_t *key) +{ + isc_result_t result; + dns_rdataset_t rdataset; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdata_rrsig_t rrsig; + + dns_rdataset_init(&rdataset); + result = dns_db_findrdataset(db, node, version, dns_rdatatype_rrsig, + type, 0, &rdataset, NULL); + if (result != ISC_R_SUCCESS) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + return (false); + } + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) { + dns_rdataset_current(&rdataset, &rdata); + result = dns_rdata_tostruct(&rdata, &rrsig, NULL); + INSIST(result == ISC_R_SUCCESS); + if (rrsig.algorithm == dst_key_alg(key) && + rrsig.keyid == dst_key_id(key)) { + dns_rdataset_disassociate(&rdataset); + return (true); + } + dns_rdata_reset(&rdata); + } + dns_rdataset_disassociate(&rdataset); + return (false); +} + +static isc_result_t +add_nsec(dns_db_t *db, dns_dbversion_t *version, dns_name_t *name, + dns_dbnode_t *node, dns_ttl_t ttl, bool bottom, + dns_diff_t *diff) +{ + dns_fixedname_t fixed; + dns_name_t *next; + dns_rdata_t rdata = DNS_RDATA_INIT; + isc_result_t result; + unsigned char nsecbuffer[DNS_NSEC_BUFFERSIZE]; + + next = dns_fixedname_initname(&fixed); + + CHECK(next_active(db, version, name, next, bottom)); + CHECK(dns_nsec_buildrdata(db, version, node, next, nsecbuffer, + &rdata)); + CHECK(update_one_rr(db, version, diff, DNS_DIFFOP_ADD, name, ttl, + &rdata)); + failure: + return (result); +} + +static isc_result_t +check_if_bottom_of_zone(dns_db_t *db, dns_dbnode_t *node, + dns_dbversion_t *version, bool *is_bottom_of_zone) +{ + isc_result_t result; + dns_rdatasetiter_t *iterator = NULL; + dns_rdataset_t rdataset; + bool seen_soa = false, seen_ns = false, seen_dname = false; + + REQUIRE(is_bottom_of_zone != NULL); + + result = dns_db_allrdatasets(db, node, version, 0, &iterator); + if (result != ISC_R_SUCCESS) { + if (result == ISC_R_NOTFOUND) { + result = ISC_R_SUCCESS; + } + return (result); + } + + dns_rdataset_init(&rdataset); + for (result = dns_rdatasetiter_first(iterator); + result == ISC_R_SUCCESS; + result = dns_rdatasetiter_next(iterator)) { + dns_rdatasetiter_current(iterator, &rdataset); + switch (rdataset.type) { + case dns_rdatatype_soa: + seen_soa = true; + break; + case dns_rdatatype_ns: + seen_ns = true; + break; + case dns_rdatatype_dname: + seen_dname = true; + break; + } + dns_rdataset_disassociate(&rdataset); + } + if (result != ISC_R_NOMORE) { + goto failure; + } + if ((seen_ns && !seen_soa) || seen_dname) { + *is_bottom_of_zone = true; + } + result = ISC_R_SUCCESS; + + failure: + dns_rdatasetiter_destroy(&iterator); + + return (result); +} + +static isc_result_t +sign_a_node(dns_db_t *db, dns_name_t *name, dns_dbnode_t *node, + dns_dbversion_t *version, bool build_nsec3, + bool build_nsec, dst_key_t *key, + isc_stdtime_t inception, isc_stdtime_t expire, + unsigned int minimum, bool is_ksk, + bool keyset_kskonly, bool is_bottom_of_zone, + dns_diff_t *diff, int32_t *signatures, isc_mem_t *mctx) +{ + isc_result_t result; + dns_rdatasetiter_t *iterator = NULL; + dns_rdataset_t rdataset; + dns_rdata_t rdata = DNS_RDATA_INIT; + isc_buffer_t buffer; + unsigned char data[1024]; + bool seen_soa, seen_ns, seen_rr, seen_dname, seen_nsec, + seen_nsec3, seen_ds; + + result = dns_db_allrdatasets(db, node, version, 0, &iterator); + if (result != ISC_R_SUCCESS) { + if (result == ISC_R_NOTFOUND) + result = ISC_R_SUCCESS; + return (result); + } + + dns_rdataset_init(&rdataset); + isc_buffer_init(&buffer, data, sizeof(data)); + seen_rr = seen_soa = seen_ns = seen_dname = seen_nsec = + seen_nsec3 = seen_ds = false; + for (result = dns_rdatasetiter_first(iterator); + result == ISC_R_SUCCESS; + result = dns_rdatasetiter_next(iterator)) { + dns_rdatasetiter_current(iterator, &rdataset); + if (rdataset.type == dns_rdatatype_soa) + seen_soa = true; + else if (rdataset.type == dns_rdatatype_ns) + seen_ns = true; + else if (rdataset.type == dns_rdatatype_ds) + seen_ds = true; + else if (rdataset.type == dns_rdatatype_dname) + seen_dname = true; + else if (rdataset.type == dns_rdatatype_nsec) + seen_nsec = true; + else if (rdataset.type == dns_rdatatype_nsec3) + seen_nsec3 = true; + if (rdataset.type != dns_rdatatype_rrsig) + seen_rr = true; + dns_rdataset_disassociate(&rdataset); + } + if (result != ISC_R_NOMORE) + goto failure; + /* + * Going from insecure to NSEC3. + * Don't generate NSEC3 records for NSEC3 records. + */ + if (build_nsec3 && !seen_nsec3 && seen_rr) { + bool unsecure = !seen_ds && seen_ns && !seen_soa; + CHECK(dns_nsec3_addnsec3s(db, version, name, minimum, + unsecure, diff)); + (*signatures)--; + } + /* + * Going from insecure to NSEC. + * Don't generate NSEC records for NSEC3 records. + */ + if (build_nsec && !seen_nsec3 && !seen_nsec && seen_rr) { + /* + * Build a NSEC record except at the origin. + */ + if (!dns_name_equal(name, dns_db_origin(db))) { + CHECK(add_nsec(db, version, name, node, minimum, + is_bottom_of_zone, diff)); + /* Count a NSEC generation as a signature generation. */ + (*signatures)--; + } + } + result = dns_rdatasetiter_first(iterator); + while (result == ISC_R_SUCCESS) { + dns_rdatasetiter_current(iterator, &rdataset); + if (rdataset.type == dns_rdatatype_soa || + rdataset.type == dns_rdatatype_rrsig) + goto next_rdataset; + if (rdataset.type == dns_rdatatype_dnskey) { + if (!is_ksk && keyset_kskonly) + goto next_rdataset; + } else if (is_ksk) { + /* + * CDS and CDNSKEY are signed with KSK (RFC 7344, 4.1). + */ + if (rdataset.type != dns_rdatatype_cds && + rdataset.type != dns_rdatatype_cdnskey) + goto next_rdataset; + } + if (seen_ns && !seen_soa && + rdataset.type != dns_rdatatype_ds && + rdataset.type != dns_rdatatype_nsec) + goto next_rdataset; + if (signed_with_key(db, node, version, rdataset.type, key)) + goto next_rdataset; + /* Calculate the signature, creating a RRSIG RDATA. */ + isc_buffer_clear(&buffer); + CHECK(dns_dnssec_sign(name, &rdataset, key, &inception, + &expire, mctx, &buffer, &rdata)); + /* Update the database and journal with the RRSIG. */ + /* XXX inefficient - will cause dataset merging */ + CHECK(update_one_rr(db, version, diff, DNS_DIFFOP_ADDRESIGN, + name, rdataset.ttl, &rdata)); + dns_rdata_reset(&rdata); + (*signatures)--; + next_rdataset: + dns_rdataset_disassociate(&rdataset); + result = dns_rdatasetiter_next(iterator); + } + if (result == ISC_R_NOMORE) + result = ISC_R_SUCCESS; + failure: + if (dns_rdataset_isassociated(&rdataset)) + dns_rdataset_disassociate(&rdataset); + if (iterator != NULL) + dns_rdatasetiter_destroy(&iterator); + return (result); +} + +/* + * If 'update_only' is set then don't create a NSEC RRset if it doesn't exist. + */ +static isc_result_t +updatesecure(dns_db_t *db, dns_dbversion_t *version, dns_name_t *name, + dns_ttl_t minimum, bool update_only, dns_diff_t *diff) +{ + isc_result_t result; + dns_rdataset_t rdataset; + dns_dbnode_t *node = NULL; + + CHECK(dns_db_getoriginnode(db, &node)); + if (update_only) { + dns_rdataset_init(&rdataset); + result = dns_db_findrdataset(db, node, version, + dns_rdatatype_nsec, + dns_rdatatype_none, + 0, &rdataset, NULL); + if (dns_rdataset_isassociated(&rdataset)) + dns_rdataset_disassociate(&rdataset); + if (result == ISC_R_NOTFOUND) + goto success; + if (result != ISC_R_SUCCESS) + goto failure; + } + CHECK(delete_nsec(db, version, node, name, diff)); + CHECK(add_nsec(db, version, name, node, minimum, false, diff)); + success: + result = ISC_R_SUCCESS; + failure: + if (node != NULL) + dns_db_detachnode(db, &node); + return (result); +} + +static isc_result_t +updatesignwithkey(dns_zone_t *zone, dns_signing_t *signing, + dns_dbversion_t *version, bool build_nsec3, + dns_ttl_t minimum, dns_diff_t *diff) +{ + isc_result_t result; + dns_dbnode_t *node = NULL; + dns_rdataset_t rdataset; + dns_rdata_t rdata = DNS_RDATA_INIT; + unsigned char data[5]; + bool seen_done = false; + bool have_rr = false; + + dns_rdataset_init(&rdataset); + result = dns_db_getoriginnode(signing->db, &node); + if (result != ISC_R_SUCCESS) + goto failure; + + result = dns_db_findrdataset(signing->db, node, version, + zone->privatetype, dns_rdatatype_none, + 0, &rdataset, NULL); + if (result == ISC_R_NOTFOUND) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + result = ISC_R_SUCCESS; + goto failure; + } + if (result != ISC_R_SUCCESS) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + goto failure; + } + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) { + dns_rdataset_current(&rdataset, &rdata); + /* + * If we don't match the algorithm or keyid skip the record. + */ + if (rdata.length != 5 || + rdata.data[0] != signing->algorithm || + rdata.data[1] != ((signing->keyid >> 8) & 0xff) || + rdata.data[2] != (signing->keyid & 0xff)) { + have_rr = true; + dns_rdata_reset(&rdata); + continue; + } + /* + * We have a match. If we were signing (!signing->deleteit) + * and we already have a record indicating that we have + * finished signing (rdata.data[4] != 0) then keep it. + * Otherwise it needs to be deleted as we have removed all + * the signatures (signing->deleteit), so any record indicating + * completion is now out of date, or we have finished signing + * with the new record so we no longer need to remember that + * we need to sign the zone with the matching key across a + * nameserver re-start. + */ + if (!signing->deleteit && rdata.data[4] != 0) { + seen_done = true; + have_rr = true; + } else + CHECK(update_one_rr(signing->db, version, diff, + DNS_DIFFOP_DEL, &zone->origin, + rdataset.ttl, &rdata)); + dns_rdata_reset(&rdata); + } + if (result == ISC_R_NOMORE) + result = ISC_R_SUCCESS; + if (!signing->deleteit && !seen_done) { + /* + * If we were signing then we need to indicate that we have + * finished signing the zone with this key. If it is already + * there we don't need to add it a second time. + */ + data[0] = signing->algorithm; + data[1] = (signing->keyid >> 8) & 0xff; + data[2] = signing->keyid & 0xff; + data[3] = 0; + data[4] = 1; + rdata.length = sizeof(data); + rdata.data = data; + rdata.type = zone->privatetype; + rdata.rdclass = dns_db_class(signing->db); + CHECK(update_one_rr(signing->db, version, diff, DNS_DIFFOP_ADD, + &zone->origin, rdataset.ttl, &rdata)); + } else if (!have_rr) { + dns_name_t *origin = dns_db_origin(signing->db); + /* + * Rebuild the NSEC/NSEC3 record for the origin as we no + * longer have any private records. + */ + if (build_nsec3) + CHECK(dns_nsec3_addnsec3s(signing->db, version, origin, + minimum, false, diff)); + CHECK(updatesecure(signing->db, version, origin, minimum, + true, diff)); + } + + failure: + if (dns_rdataset_isassociated(&rdataset)) + dns_rdataset_disassociate(&rdataset); + if (node != NULL) + dns_db_detachnode(signing->db, &node); + return (result); +} + +/* + * Called from zone_nsec3chain() in order to update zone records indicating + * processing status of given NSEC3 chain: + * + * - If the supplied dns_nsec3chain_t structure has been fully processed + * (which is indicated by "active" being set to false): + * + * - remove all NSEC3PARAM records matching the relevant NSEC3 chain, + * + * - remove all private-type records containing NSEC3PARAM RDATA matching + * the relevant NSEC3 chain. + * + * - If the supplied dns_nsec3chain_t structure has not been fully processed + * (which is indicated by "active" being set to true), only remove the + * NSEC3PARAM record which matches the relevant NSEC3 chain and has the + * "flags" field set to 0. + * + * - If given NSEC3 chain is being added, add an NSEC3PARAM record contained + * in the relevant private-type record, but with the "flags" field set to + * 0, indicating that this NSEC3 chain is now complete for this zone. + * + * Note that this function is called at different processing stages for NSEC3 + * chain additions vs. removals and needs to handle all cases properly. + */ +static isc_result_t +fixup_nsec3param(dns_db_t *db, dns_dbversion_t *ver, dns_nsec3chain_t *chain, + bool active, dns_rdatatype_t privatetype, + dns_diff_t *diff) +{ + dns_dbnode_t *node = NULL; + dns_name_t *name = dns_db_origin(db); + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdataset_t rdataset; + dns_rdata_nsec3param_t nsec3param; + isc_result_t result; + isc_buffer_t buffer; + unsigned char parambuf[DNS_NSEC3PARAM_BUFFERSIZE]; + dns_ttl_t ttl = 0; + bool nseconly = false, nsec3ok = false; + + dns_rdataset_init(&rdataset); + + result = dns_db_getoriginnode(db, &node); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec3param, + 0, 0, &rdataset, NULL); + if (result == ISC_R_NOTFOUND) + goto try_private; + if (result != ISC_R_SUCCESS) + goto failure; + + /* + * Preserve the existing ttl. + */ + ttl = rdataset.ttl; + + /* + * Delete all NSEC3PARAM records which match that in nsec3chain. + */ + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) { + + dns_rdataset_current(&rdataset, &rdata); + CHECK(dns_rdata_tostruct(&rdata, &nsec3param, NULL)); + + if (nsec3param.hash != chain->nsec3param.hash || + (active && nsec3param.flags != 0) || + nsec3param.iterations != chain->nsec3param.iterations || + nsec3param.salt_length != chain->nsec3param.salt_length || + memcmp(nsec3param.salt, chain->nsec3param.salt, + nsec3param.salt_length)) { + dns_rdata_reset(&rdata); + continue; + } + + CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_DEL, + name, rdataset.ttl, &rdata)); + dns_rdata_reset(&rdata); + } + if (result != ISC_R_NOMORE) + goto failure; + + dns_rdataset_disassociate(&rdataset); + + try_private: + + if (active) + goto add; + + result = dns_nsec_nseconly(db, ver, &nseconly); + nsec3ok = (result == ISC_R_SUCCESS && !nseconly); + + /* + * Delete all private records which match that in nsec3chain. + */ + result = dns_db_findrdataset(db, node, ver, privatetype, + 0, 0, &rdataset, NULL); + if (result == ISC_R_NOTFOUND) + goto add; + if (result != ISC_R_SUCCESS) + goto failure; + + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) { + dns_rdata_t private = DNS_RDATA_INIT; + unsigned char buf[DNS_NSEC3PARAM_BUFFERSIZE]; + + dns_rdataset_current(&rdataset, &private); + if (!dns_nsec3param_fromprivate(&private, &rdata, + buf, sizeof(buf))) + continue; + CHECK(dns_rdata_tostruct(&rdata, &nsec3param, NULL)); + + if ((!nsec3ok && + (nsec3param.flags & DNS_NSEC3FLAG_INITIAL) != 0) || + nsec3param.hash != chain->nsec3param.hash || + nsec3param.iterations != chain->nsec3param.iterations || + nsec3param.salt_length != chain->nsec3param.salt_length || + memcmp(nsec3param.salt, chain->nsec3param.salt, + nsec3param.salt_length)) { + dns_rdata_reset(&rdata); + continue; + } + + CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_DEL, + name, rdataset.ttl, &private)); + dns_rdata_reset(&rdata); + } + if (result != ISC_R_NOMORE) + goto failure; + + add: + if ((chain->nsec3param.flags & DNS_NSEC3FLAG_REMOVE) != 0) { + result = ISC_R_SUCCESS; + goto failure; + } + + /* + * Add a NSEC3PARAM record which matches that in nsec3chain but + * with all flags bits cleared. + * + * Note: we do not clear chain->nsec3param.flags as this change + * may be reversed. + */ + isc_buffer_init(&buffer, ¶mbuf, sizeof(parambuf)); + CHECK(dns_rdata_fromstruct(&rdata, dns_db_class(db), + dns_rdatatype_nsec3param, + &chain->nsec3param, &buffer)); + rdata.data[1] = 0; /* Clear flag bits. */ + CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_ADD, name, ttl, &rdata)); + + failure: + dns_db_detachnode(db, &node); + if (dns_rdataset_isassociated(&rdataset)) + dns_rdataset_disassociate(&rdataset); + return (result); +} + +static isc_result_t +delete_nsec(dns_db_t *db, dns_dbversion_t *ver, dns_dbnode_t *node, + dns_name_t *name, dns_diff_t *diff) +{ + dns_rdataset_t rdataset; + isc_result_t result; + + dns_rdataset_init(&rdataset); + + result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec, + 0, 0, &rdataset, NULL); + if (result == ISC_R_NOTFOUND) + return (ISC_R_SUCCESS); + if (result != ISC_R_SUCCESS) + return (result); + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) { + dns_rdata_t rdata = DNS_RDATA_INIT; + + dns_rdataset_current(&rdataset, &rdata); + CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_DEL, name, + rdataset.ttl, &rdata)); + } + if (result == ISC_R_NOMORE) + result = ISC_R_SUCCESS; + failure: + dns_rdataset_disassociate(&rdataset); + return (result); +} + +static isc_result_t +deletematchingnsec3(dns_db_t *db, dns_dbversion_t *ver, dns_dbnode_t *node, + dns_name_t *name, const dns_rdata_nsec3param_t *param, + dns_diff_t *diff) +{ + dns_rdataset_t rdataset; + dns_rdata_nsec3_t nsec3; + isc_result_t result; + + dns_rdataset_init(&rdataset); + result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec3, + 0, 0, &rdataset, NULL); + if (result == ISC_R_NOTFOUND) + return (ISC_R_SUCCESS); + if (result != ISC_R_SUCCESS) + return (result); + + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) { + dns_rdata_t rdata = DNS_RDATA_INIT; + + dns_rdataset_current(&rdataset, &rdata); + CHECK(dns_rdata_tostruct(&rdata, &nsec3, NULL)); + if (nsec3.hash != param->hash || + nsec3.iterations != param->iterations || + nsec3.salt_length != param->salt_length || + memcmp(nsec3.salt, param->salt, nsec3.salt_length)) + continue; + CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_DEL, name, + rdataset.ttl, &rdata)); + } + if (result == ISC_R_NOMORE) + result = ISC_R_SUCCESS; + failure: + dns_rdataset_disassociate(&rdataset); + return (result); +} + +static isc_result_t +need_nsec_chain(dns_db_t *db, dns_dbversion_t *ver, + const dns_rdata_nsec3param_t *param, + bool *answer) +{ + dns_dbnode_t *node = NULL; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdata_nsec3param_t myparam; + dns_rdataset_t rdataset; + isc_result_t result; + + *answer = false; + + result = dns_db_getoriginnode(db, &node); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + dns_rdataset_init(&rdataset); + + result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec, + 0, 0, &rdataset, NULL); + if (result == ISC_R_SUCCESS) { + dns_rdataset_disassociate(&rdataset); + dns_db_detachnode(db, &node); + return (result); + } + if (result != ISC_R_NOTFOUND) { + dns_db_detachnode(db, &node); + return (result); + } + + result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec3param, + 0, 0, &rdataset, NULL); + if (result == ISC_R_NOTFOUND) { + *answer = true; + dns_db_detachnode(db, &node); + return (ISC_R_SUCCESS); + } + if (result != ISC_R_SUCCESS) { + dns_db_detachnode(db, &node); + return (result); + } + + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) { + dns_rdataset_current(&rdataset, &rdata); + CHECK(dns_rdata_tostruct(&rdata, &myparam, NULL)); + dns_rdata_reset(&rdata); + /* + * Ignore any NSEC3PARAM removals. + */ + if (NSEC3REMOVE(myparam.flags)) + continue; + /* + * Ignore the chain that we are in the process of deleting. + */ + if (myparam.hash == param->hash && + myparam.iterations == param->iterations && + myparam.salt_length == param->salt_length && + !memcmp(myparam.salt, param->salt, myparam.salt_length)) + continue; + /* + * Found an active NSEC3 chain. + */ + break; + } + if (result == ISC_R_NOMORE) { + *answer = true; + result = ISC_R_SUCCESS; + } + + failure: + if (dns_rdataset_isassociated(&rdataset)) + dns_rdataset_disassociate(&rdataset); + dns_db_detachnode(db, &node); + return (result); +} + +/*% + * Add/remove DNSSEC signatures for the list of "raw" zone changes supplied in + * 'diff'. Gradually remove tuples from 'diff' and append them to 'zonediff' + * along with tuples representing relevant signature changes. + */ +isc_result_t +dns__zone_updatesigs(dns_diff_t *diff, dns_db_t *db, dns_dbversion_t *version, + dst_key_t *zone_keys[], unsigned int nkeys, + dns_zone_t *zone, isc_stdtime_t inception, + isc_stdtime_t expire, isc_stdtime_t now, + bool check_ksk, bool keyset_kskonly, + dns__zonediff_t *zonediff) +{ + dns_difftuple_t *tuple; + isc_result_t result; + + for (tuple = ISC_LIST_HEAD(diff->tuples); + tuple != NULL; + tuple = ISC_LIST_HEAD(diff->tuples)) { + result = del_sigs(zone, db, version, &tuple->name, + tuple->rdata.type, zonediff, + zone_keys, nkeys, now, false); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "dns__zone_updatesigs:del_sigs -> %s", + dns_result_totext(result)); + return (result); + } + result = add_sigs(db, version, &tuple->name, + tuple->rdata.type, zonediff->diff, + zone_keys, nkeys, zone->mctx, inception, + expire, check_ksk, keyset_kskonly); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "dns__zone_updatesigs:add_sigs -> %s", + dns_result_totext(result)); + return (result); + } + + do { + dns_difftuple_t *next = ISC_LIST_NEXT(tuple, link); + while (next != NULL && + (tuple->rdata.type != next->rdata.type || + !dns_name_equal(&tuple->name, &next->name))) + next = ISC_LIST_NEXT(next, link); + ISC_LIST_UNLINK(diff->tuples, tuple, link); + dns_diff_appendminimal(zonediff->diff, &tuple); + INSIST(tuple == NULL); + tuple = next; + } while (tuple != NULL); + } + return (ISC_R_SUCCESS); +} + +/* + * Incrementally build and sign a new NSEC3 chain using the parameters + * requested. + */ +static void +zone_nsec3chain(dns_zone_t *zone) { + const char *me = "zone_nsec3chain"; + dns_db_t *db = NULL; + dns_dbnode_t *node = NULL; + dns_dbversion_t *version = NULL; + dns_diff_t _sig_diff; + dns_diff_t nsec_diff; + dns_diff_t nsec3_diff; + dns_diff_t param_diff; + dns__zonediff_t zonediff; + dns_fixedname_t fixed; + dns_fixedname_t nextfixed; + dns_name_t *name, *nextname; + dns_rdataset_t rdataset; + dns_nsec3chain_t *nsec3chain = NULL, *nextnsec3chain; + dns_nsec3chainlist_t cleanup; + dst_key_t *zone_keys[DNS_MAXZONEKEYS]; + int32_t signatures; + bool check_ksk, keyset_kskonly; + bool delegation; + bool first; + isc_result_t result; + isc_stdtime_t now, inception, soaexpire, expire; + uint32_t jitter, sigvalidityinterval; + unsigned int i; + unsigned int nkeys = 0; + uint32_t nodes; + bool unsecure = false; + bool seen_soa, seen_ns, seen_dname, seen_ds; + bool seen_nsec, seen_nsec3, seen_rr; + dns_rdatasetiter_t *iterator = NULL; + bool buildnsecchain; + bool updatensec = false; + dns_rdatatype_t privatetype = zone->privatetype; + + ENTER; + + dns_rdataset_init(&rdataset); + name = dns_fixedname_initname(&fixed); + nextname = dns_fixedname_initname(&nextfixed); + dns_diff_init(zone->mctx, ¶m_diff); + dns_diff_init(zone->mctx, &nsec3_diff); + dns_diff_init(zone->mctx, &nsec_diff); + dns_diff_init(zone->mctx, &_sig_diff); + zonediff_init(&zonediff, &_sig_diff); + ISC_LIST_INIT(cleanup); + + /* + * Updates are disabled. Pause for 5 minutes. + */ + if (zone->update_disabled) { + result = ISC_R_FAILURE; + goto failure; + } + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + /* + * This function is called when zone timer fires, after the latter gets + * set by zone_addnsec3chain(). If the action triggering the call to + * zone_addnsec3chain() is closely followed by a zone deletion request, + * it might turn out that the timer thread will not be woken up until + * after the zone is deleted by rmzone(), which calls dns_db_detach() + * for zone->db, causing the latter to become NULL. Return immediately + * if that happens. + */ + if (zone->db != NULL) { + dns_db_attach(zone->db, &db); + } + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + if (db == NULL) { + return; + } + + result = dns_db_newversion(db, &version); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_nsec3chain:dns_db_newversion -> %s", + dns_result_totext(result)); + goto failure; + } + + isc_stdtime_get(&now); + + result = dns__zone_findkeys(zone, db, version, now, zone->mctx, + DNS_MAXZONEKEYS, zone_keys, &nkeys); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_nsec3chain:dns__zone_findkeys -> %s", + dns_result_totext(result)); + goto failure; + } + + sigvalidityinterval = dns_zone_getsigvalidityinterval(zone); + inception = now - 3600; /* Allow for clock skew. */ + soaexpire = now + sigvalidityinterval; + + /* + * Spread out signatures over time if they happen to be + * clumped. We don't do this for each add_sigs() call as + * we still want some clustering to occur. + */ + if (sigvalidityinterval >= 3600U) { + isc_random_get(&jitter); + if (sigvalidityinterval > 7200U) { + jitter %= 3600; + } else { + jitter %= 1200; + } + expire = soaexpire - jitter - 1; + } else { + expire = soaexpire - 1; + } + + check_ksk = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_UPDATECHECKKSK); + keyset_kskonly = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_DNSKEYKSKONLY); + + /* + * We keep pulling nodes off each iterator in turn until + * we have no more nodes to pull off or we reach the limits + * for this quantum. + */ + nodes = zone->nodes; + signatures = zone->signatures; + LOCK_ZONE(zone); + nsec3chain = ISC_LIST_HEAD(zone->nsec3chain); + UNLOCK_ZONE(zone); + first = true; + + if (nsec3chain != NULL) + nsec3chain->save_delete_nsec = nsec3chain->delete_nsec; + /* + * Generate new NSEC3 chains first. + * + * The following while loop iterates over nodes in the zone database, + * updating the NSEC3 chain by calling dns_nsec3_addnsec3() for each of + * them. Once all nodes are processed, the "delete_nsec" field is + * consulted to check whether we are supposed to remove NSEC records + * from the zone database; if so, the database iterator is reset to + * point to the first node and the loop traverses all of them again, + * this time removing NSEC records. If we hit a node which is obscured + * by a delegation or a DNAME, nodes are skipped over until we find one + * that is not obscured by the same obscuring name and then normal + * processing is resumed. + * + * The above is repeated until all requested NSEC3 chain changes are + * applied or when we reach the limits for this quantum, whichever + * happens first. + * + * Note that the "signatures" variable is only used here to limit the + * amount of work performed. Actual DNSSEC signatures are only + * generated by dns__zone_updatesigs() calls later in this function. + */ + while (nsec3chain != NULL && nodes-- > 0 && signatures > 0) { + LOCK_ZONE(zone); + nextnsec3chain = ISC_LIST_NEXT(nsec3chain, link); + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (nsec3chain->done || nsec3chain->db != zone->db) { + ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain, link); + ISC_LIST_APPEND(cleanup, nsec3chain, link); + } + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + UNLOCK_ZONE(zone); + if (ISC_LIST_TAIL(cleanup) == nsec3chain) + goto next_addchain; + + /* + * Possible future db. + */ + if (nsec3chain->db != db) { + goto next_addchain; + } + + if (NSEC3REMOVE(nsec3chain->nsec3param.flags)) + goto next_addchain; + + dns_dbiterator_current(nsec3chain->dbiterator, &node, name); + + if (nsec3chain->delete_nsec) { + delegation = false; + dns_dbiterator_pause(nsec3chain->dbiterator); + CHECK(delete_nsec(db, version, node, name, &nsec_diff)); + goto next_addnode; + } + /* + * On the first pass we need to check if the current node + * has not been obscured. + */ + delegation = false; + unsecure = false; + if (first) { + dns_fixedname_t ffound; + dns_name_t *found; + found = dns_fixedname_initname(&ffound); + result = dns_db_find(db, name, version, + dns_rdatatype_soa, + DNS_DBFIND_NOWILD, 0, NULL, found, + NULL, NULL); + if ((result == DNS_R_DELEGATION || + result == DNS_R_DNAME) && + !dns_name_equal(name, found)) { + /* + * Remember the obscuring name so that + * we skip all obscured names. + */ + dns_name_copy(found, name, NULL); + delegation = true; + goto next_addnode; + } + } + + /* + * Check to see if this is a bottom of zone node. + */ + result = dns_db_allrdatasets(db, node, version, 0, &iterator); + if (result == ISC_R_NOTFOUND) /* Empty node? */ + goto next_addnode; + if (result != ISC_R_SUCCESS) + goto failure; + + seen_soa = seen_ns = seen_dname = seen_ds = seen_nsec = + false; + for (result = dns_rdatasetiter_first(iterator); + result == ISC_R_SUCCESS; + result = dns_rdatasetiter_next(iterator)) { + dns_rdatasetiter_current(iterator, &rdataset); + INSIST(rdataset.type != dns_rdatatype_nsec3); + if (rdataset.type == dns_rdatatype_soa) + seen_soa = true; + else if (rdataset.type == dns_rdatatype_ns) + seen_ns = true; + else if (rdataset.type == dns_rdatatype_dname) + seen_dname = true; + else if (rdataset.type == dns_rdatatype_ds) + seen_ds = true; + else if (rdataset.type == dns_rdatatype_nsec) + seen_nsec = true; + dns_rdataset_disassociate(&rdataset); + } + dns_rdatasetiter_destroy(&iterator); + /* + * Is there a NSEC chain than needs to be cleaned up? + */ + if (seen_nsec) + nsec3chain->seen_nsec = true; + if (seen_ns && !seen_soa && !seen_ds) + unsecure = true; + if ((seen_ns && !seen_soa) || seen_dname) + delegation = true; + + /* + * Process one node. + */ + dns_dbiterator_pause(nsec3chain->dbiterator); + result = dns_nsec3_addnsec3(db, version, name, + &nsec3chain->nsec3param, + zone->minimum, unsecure, + &nsec3_diff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:" + "dns_nsec3_addnsec3 -> %s", + dns_result_totext(result)); + goto failure; + } + + /* + * Treat each call to dns_nsec3_addnsec3() as if it's cost is + * two signatures. Additionally there will, in general, be + * two signature generated below. + * + * If we are only changing the optout flag the cost is half + * that of the cost of generating a completely new chain. + */ + signatures -= 4; + + /* + * Go onto next node. + */ + next_addnode: + first = false; + dns_db_detachnode(db, &node); + do { + result = dns_dbiterator_next(nsec3chain->dbiterator); + + if (result == ISC_R_NOMORE && nsec3chain->delete_nsec) { + dns_dbiterator_pause(nsec3chain->dbiterator); + CHECK(fixup_nsec3param(db, version, nsec3chain, + false, privatetype, + ¶m_diff)); + LOCK_ZONE(zone); + ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain, + link); + UNLOCK_ZONE(zone); + ISC_LIST_APPEND(cleanup, nsec3chain, link); + goto next_addchain; + } + if (result == ISC_R_NOMORE) { + dns_dbiterator_pause(nsec3chain->dbiterator); + if (nsec3chain->seen_nsec) { + CHECK(fixup_nsec3param(db, version, + nsec3chain, + true, + privatetype, + ¶m_diff)); + nsec3chain->delete_nsec = true; + goto same_addchain; + } + CHECK(fixup_nsec3param(db, version, nsec3chain, + false, privatetype, + ¶m_diff)); + LOCK_ZONE(zone); + ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain, + link); + UNLOCK_ZONE(zone); + ISC_LIST_APPEND(cleanup, nsec3chain, link); + goto next_addchain; + } else if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_nsec3chain:" + "dns_dbiterator_next -> %s", + dns_result_totext(result)); + goto failure; + } else if (delegation) { + dns_dbiterator_current(nsec3chain->dbiterator, + &node, nextname); + dns_db_detachnode(db, &node); + if (!dns_name_issubdomain(nextname, name)) + break; + } else + break; + } while (1); + continue; + + same_addchain: + CHECK(dns_dbiterator_first(nsec3chain->dbiterator)); + first = true; + continue; + + next_addchain: + dns_dbiterator_pause(nsec3chain->dbiterator); + nsec3chain = nextnsec3chain; + first = true; + if (nsec3chain != NULL) + nsec3chain->save_delete_nsec = nsec3chain->delete_nsec; + } + + if (nsec3chain != NULL) + goto skip_removals; + + /* + * Process removals. + * + * This is a counterpart of the above while loop which takes care of + * removing an NSEC3 chain. It starts with determining whether the + * zone needs to switch from NSEC3 to NSEC; if so, it first builds an + * NSEC chain by iterating over all nodes in the zone database and only + * then goes on to remove NSEC3 records be iterating over all nodes + * again and calling deletematchingnsec3() for each of them; otherwise, + * it starts removing NSEC3 records immediately. Rules for processing + * obscured nodes and interrupting work are the same as for the while + * loop above. + */ + LOCK_ZONE(zone); + nsec3chain = ISC_LIST_HEAD(zone->nsec3chain); + UNLOCK_ZONE(zone); + first = true; + buildnsecchain = false; + while (nsec3chain != NULL && nodes-- > 0 && signatures > 0) { + LOCK_ZONE(zone); + nextnsec3chain = ISC_LIST_NEXT(nsec3chain, link); + UNLOCK_ZONE(zone); + + if (nsec3chain->db != db) + goto next_removechain; + + if (!NSEC3REMOVE(nsec3chain->nsec3param.flags)) + goto next_removechain; + + /* + * Work out if we need to build a NSEC chain as a consequence + * of removing this NSEC3 chain. + */ + if (first && !updatensec && + (nsec3chain->nsec3param.flags & DNS_NSEC3FLAG_NONSEC) == 0) + { + result = need_nsec_chain(db, version, + &nsec3chain->nsec3param, + &buildnsecchain); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_nsec3chain:" + "need_nsec_chain -> %s", + dns_result_totext(result)); + goto failure; + } + } + + if (first) + dns_zone_log(zone, ISC_LOG_DEBUG(3), "zone_nsec3chain:" + "buildnsecchain = %u\n", buildnsecchain); + + dns_dbiterator_current(nsec3chain->dbiterator, &node, name); + delegation = false; + + if (!buildnsecchain) { + /* + * Delete the NSEC3PARAM record matching this chain. + */ + if (first) { + result = fixup_nsec3param(db, version, + nsec3chain, + true, privatetype, + ¶m_diff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_nsec3chain:" + "fixup_nsec3param -> %s", + dns_result_totext(result)); + goto failure; + } + } + + /* + * Delete the NSEC3 records. + */ + result = deletematchingnsec3(db, version, node, name, + &nsec3chain->nsec3param, + &nsec3_diff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_nsec3chain:" + "deletematchingnsec3 -> %s", + dns_result_totext(result)); + goto failure; + } + goto next_removenode; + } + + if (first) { + dns_fixedname_t ffound; + dns_name_t *found; + found = dns_fixedname_initname(&ffound); + result = dns_db_find(db, name, version, + dns_rdatatype_soa, + DNS_DBFIND_NOWILD, 0, NULL, found, + NULL, NULL); + if ((result == DNS_R_DELEGATION || + result == DNS_R_DNAME) && + !dns_name_equal(name, found)) { + /* + * Remember the obscuring name so that + * we skip all obscured names. + */ + dns_name_copy(found, name, NULL); + delegation = true; + goto next_removenode; + } + } + + /* + * Check to see if this is a bottom of zone node. + */ + result = dns_db_allrdatasets(db, node, version, 0, &iterator); + if (result == ISC_R_NOTFOUND) /* Empty node? */ + goto next_removenode; + if (result != ISC_R_SUCCESS) + goto failure; + + seen_soa = seen_ns = seen_dname = seen_nsec3 = seen_nsec = + seen_rr = false; + for (result = dns_rdatasetiter_first(iterator); + result == ISC_R_SUCCESS; + result = dns_rdatasetiter_next(iterator)) { + dns_rdatasetiter_current(iterator, &rdataset); + if (rdataset.type == dns_rdatatype_soa) + seen_soa = true; + else if (rdataset.type == dns_rdatatype_ns) + seen_ns = true; + else if (rdataset.type == dns_rdatatype_dname) + seen_dname = true; + else if (rdataset.type == dns_rdatatype_nsec) + seen_nsec = true; + else if (rdataset.type == dns_rdatatype_nsec3) + seen_nsec3 = true; + if (rdataset.type != dns_rdatatype_rrsig) + seen_rr = true; + dns_rdataset_disassociate(&rdataset); + } + dns_rdatasetiter_destroy(&iterator); + + if (!seen_rr || seen_nsec3 || seen_nsec) + goto next_removenode; + if ((seen_ns && !seen_soa) || seen_dname) + delegation = true; + + /* + * Add a NSEC record except at the origin. + */ + if (!dns_name_equal(name, dns_db_origin(db))) { + dns_dbiterator_pause(nsec3chain->dbiterator); + CHECK(add_nsec(db, version, name, node, zone->minimum, + delegation, &nsec_diff)); + signatures--; + } + + next_removenode: + first = false; + dns_db_detachnode(db, &node); + do { + result = dns_dbiterator_next(nsec3chain->dbiterator); + if (result == ISC_R_NOMORE && buildnsecchain) { + /* + * The NSEC chain should now be built. + * We can now remove the NSEC3 chain. + */ + updatensec = true; + goto same_removechain; + } + if (result == ISC_R_NOMORE) { + LOCK_ZONE(zone); + ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain, + link); + UNLOCK_ZONE(zone); + ISC_LIST_APPEND(cleanup, nsec3chain, link); + dns_dbiterator_pause(nsec3chain->dbiterator); + result = fixup_nsec3param(db, version, + nsec3chain, false, + privatetype, + ¶m_diff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_nsec3chain:" + "fixup_nsec3param -> %s", + dns_result_totext(result)); + goto failure; + } + goto next_removechain; + } else if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_nsec3chain:" + "dns_dbiterator_next -> %s", + dns_result_totext(result)); + goto failure; + } else if (delegation) { + dns_dbiterator_current(nsec3chain->dbiterator, + &node, nextname); + dns_db_detachnode(db, &node); + if (!dns_name_issubdomain(nextname, name)) + break; + } else + break; + } while (1); + continue; + + same_removechain: + CHECK(dns_dbiterator_first(nsec3chain->dbiterator)); + buildnsecchain = false; + first = true; + continue; + + next_removechain: + dns_dbiterator_pause(nsec3chain->dbiterator); + nsec3chain = nextnsec3chain; + first = true; + } + + skip_removals: + /* + * We may need to update the NSEC/NSEC3 records for the zone apex. + */ + if (!ISC_LIST_EMPTY(param_diff.tuples)) { + bool rebuild_nsec = false, + rebuild_nsec3 = false; + result = dns_db_getoriginnode(db, &node); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + result = dns_db_allrdatasets(db, node, version, 0, &iterator); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:" + "dns_db_allrdatasets -> %s", + dns_result_totext(result)); + goto failure; + } + for (result = dns_rdatasetiter_first(iterator); + result == ISC_R_SUCCESS; + result = dns_rdatasetiter_next(iterator)) { + dns_rdatasetiter_current(iterator, &rdataset); + if (rdataset.type == dns_rdatatype_nsec) + rebuild_nsec = true; + if (rdataset.type == dns_rdatatype_nsec3param) + rebuild_nsec3 = true; + dns_rdataset_disassociate(&rdataset); + } + dns_rdatasetiter_destroy(&iterator); + dns_db_detachnode(db, &node); + + if (rebuild_nsec) { + if (nsec3chain != NULL) + dns_dbiterator_pause(nsec3chain->dbiterator); + + result = updatesecure(db, version, &zone->origin, + zone->minimum, true, + &nsec_diff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_nsec3chain:" + "updatesecure -> %s", + dns_result_totext(result)); + goto failure; + } + } + + if (rebuild_nsec3) { + if (nsec3chain != NULL) + dns_dbiterator_pause(nsec3chain->dbiterator); + + result = dns_nsec3_addnsec3s(db, version, + dns_db_origin(db), + zone->minimum, false, + &nsec3_diff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_nsec3chain:" + "dns_nsec3_addnsec3s -> %s", + dns_result_totext(result)); + goto failure; + } + } + } + + /* + * Add / update signatures for the NSEC3 records. + */ + if (nsec3chain != NULL) + dns_dbiterator_pause(nsec3chain->dbiterator); + result = dns__zone_updatesigs(&nsec3_diff, db, version, zone_keys, + nkeys, zone, inception, expire, now, + check_ksk, keyset_kskonly, &zonediff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:" + "dns__zone_updatesigs -> %s", + dns_result_totext(result)); + goto failure; + } + + /* + * We have changed the NSEC3PARAM or private RRsets + * above so we need to update the signatures. + */ + result = dns__zone_updatesigs(¶m_diff, db, version, zone_keys, + nkeys, zone, inception, expire, now, + check_ksk, keyset_kskonly, &zonediff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:" + "dns__zone_updatesigs -> %s", + dns_result_totext(result)); + goto failure; + } + + if (updatensec) { + result = updatesecure(db, version, &zone->origin, + zone->minimum, false, &nsec_diff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:" + "updatesecure -> %s", + dns_result_totext(result)); + goto failure; + } + } + + result = dns__zone_updatesigs(&nsec_diff, db, version, zone_keys, + nkeys, zone, inception, expire, now, + check_ksk, keyset_kskonly, &zonediff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:" + "dns__zone_updatesigs -> %s", + dns_result_totext(result)); + goto failure; + } + + /* + * If we made no effective changes to the zone then we can just + * cleanup otherwise we need to increment the serial. + */ + if (ISC_LIST_EMPTY(zonediff.diff->tuples)) { + /* + * No need to call dns_db_closeversion() here as it is + * called with commit = true below. + */ + goto done; + } + + result = del_sigs(zone, db, version, &zone->origin, dns_rdatatype_soa, + &zonediff, zone_keys, nkeys, now, false); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:" + "del_sigs -> %s", dns_result_totext(result)); + goto failure; + } + + result = update_soa_serial(db, version, zonediff.diff, zone->mctx, + zone->updatemethod); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:" + "update_soa_serial -> %s", + dns_result_totext(result)); + goto failure; + } + + result = add_sigs(db, version, &zone->origin, dns_rdatatype_soa, + zonediff.diff, zone_keys, nkeys, zone->mctx, + inception, soaexpire, check_ksk, keyset_kskonly); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:" + "add_sigs -> %s", dns_result_totext(result)); + goto failure; + } + + /* Write changes to journal file. */ + CHECK(zone_journal(zone, zonediff.diff, NULL, "zone_nsec3chain")); + + LOCK_ZONE(zone); + zone_needdump(zone, DNS_DUMP_DELAY); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY); + UNLOCK_ZONE(zone); + + done: + /* + * Pause all iterators so that dns_db_closeversion() can succeed. + */ + LOCK_ZONE(zone); + for (nsec3chain = ISC_LIST_HEAD(zone->nsec3chain); + nsec3chain != NULL; + nsec3chain = ISC_LIST_NEXT(nsec3chain, link)) + dns_dbiterator_pause(nsec3chain->dbiterator); + UNLOCK_ZONE(zone); + + /* + * Everything has succeeded. Commit the changes. + * Unconditionally commit as zonediff.offline not checked above. + */ + dns_db_closeversion(db, &version, true); + + /* + * Everything succeeded so we can clean these up now. + */ + nsec3chain = ISC_LIST_HEAD(cleanup); + while (nsec3chain != NULL) { + ISC_LIST_UNLINK(cleanup, nsec3chain, link); + dns_db_detach(&nsec3chain->db); + dns_dbiterator_destroy(&nsec3chain->dbiterator); + isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain); + nsec3chain = ISC_LIST_HEAD(cleanup); + } + + set_resigntime(zone); + + failure: + if (result != ISC_R_SUCCESS) + dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain: %s", + dns_result_totext(result)); + /* + * On error roll back the current nsec3chain. + */ + if (result != ISC_R_SUCCESS && nsec3chain != NULL) { + if (nsec3chain->done) { + dns_db_detach(&nsec3chain->db); + dns_dbiterator_destroy(&nsec3chain->dbiterator); + isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain); + } else { + result = dns_dbiterator_first(nsec3chain->dbiterator); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + dns_dbiterator_pause(nsec3chain->dbiterator); + nsec3chain->delete_nsec = nsec3chain->save_delete_nsec; + } + } + + /* + * Rollback the cleanup list. + */ + nsec3chain = ISC_LIST_TAIL(cleanup); + while (nsec3chain != NULL) { + ISC_LIST_UNLINK(cleanup, nsec3chain, link); + if (nsec3chain->done) { + dns_db_detach(&nsec3chain->db); + dns_dbiterator_destroy(&nsec3chain->dbiterator); + isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain); + } else { + LOCK_ZONE(zone); + ISC_LIST_PREPEND(zone->nsec3chain, nsec3chain, link); + UNLOCK_ZONE(zone); + result = dns_dbiterator_first(nsec3chain->dbiterator); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + dns_dbiterator_pause(nsec3chain->dbiterator); + nsec3chain->delete_nsec = nsec3chain->save_delete_nsec; + } + nsec3chain = ISC_LIST_TAIL(cleanup); + } + + LOCK_ZONE(zone); + for (nsec3chain = ISC_LIST_HEAD(zone->nsec3chain); + nsec3chain != NULL; + nsec3chain = ISC_LIST_NEXT(nsec3chain, link)) + dns_dbiterator_pause(nsec3chain->dbiterator); + UNLOCK_ZONE(zone); + + dns_diff_clear(¶m_diff); + dns_diff_clear(&nsec3_diff); + dns_diff_clear(&nsec_diff); + dns_diff_clear(&_sig_diff); + + if (iterator != NULL) + dns_rdatasetiter_destroy(&iterator); + + for (i = 0; i < nkeys; i++) + dst_key_free(&zone_keys[i]); + + if (node != NULL) + dns_db_detachnode(db, &node); + if (version != NULL) { + dns_db_closeversion(db, &version, false); + dns_db_detach(&db); + } else if (db != NULL) + dns_db_detach(&db); + + LOCK_ZONE(zone); + if (ISC_LIST_HEAD(zone->nsec3chain) != NULL) { + isc_interval_t interval; + if (zone->update_disabled || result != ISC_R_SUCCESS) + isc_interval_set(&interval, 60, 0); /* 1 minute */ + else + isc_interval_set(&interval, 0, 10000000); /* 10 ms */ + isc_time_nowplusinterval(&zone->nsec3chaintime, &interval); + } else + isc_time_settoepoch(&zone->nsec3chaintime); + UNLOCK_ZONE(zone); + + INSIST(version == NULL); +} + +/*% + * Delete all RRSIG records with the given algorithm and keyid. + * Remove the NSEC record and RRSIGs if nkeys is zero. + * If all remaining RRsets are signed with the given algorithm + * set *has_algp to true. + */ +static isc_result_t +del_sig(dns_db_t *db, dns_dbversion_t *version, dns_name_t *name, + dns_dbnode_t *node, unsigned int nkeys, dns_secalg_t algorithm, + uint16_t keyid, bool *has_algp, dns_diff_t *diff) +{ + dns_rdata_rrsig_t rrsig; + dns_rdataset_t rdataset; + dns_rdatasetiter_t *iterator = NULL; + isc_result_t result; + bool alg_missed = false; + bool alg_found = false; + + char namebuf[DNS_NAME_FORMATSIZE]; + dns_name_format(name, namebuf, sizeof(namebuf)); + + result = dns_db_allrdatasets(db, node, version, 0, &iterator); + if (result != ISC_R_SUCCESS) { + if (result == ISC_R_NOTFOUND) + result = ISC_R_SUCCESS; + return (result); + } + + dns_rdataset_init(&rdataset); + for (result = dns_rdatasetiter_first(iterator); + result == ISC_R_SUCCESS; + result = dns_rdatasetiter_next(iterator)) { + bool has_alg = false; + dns_rdatasetiter_current(iterator, &rdataset); + if (nkeys == 0 && rdataset.type == dns_rdatatype_nsec) { + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) { + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdataset_current(&rdataset, &rdata); + CHECK(update_one_rr(db, version, diff, + DNS_DIFFOP_DEL, name, + rdataset.ttl, &rdata)); + } + if (result != ISC_R_NOMORE) + goto failure; + dns_rdataset_disassociate(&rdataset); + continue; + } + if (rdataset.type != dns_rdatatype_rrsig) { + dns_rdataset_disassociate(&rdataset); + continue; + } + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) + { + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdataset_current(&rdataset, &rdata); + CHECK(dns_rdata_tostruct(&rdata, &rrsig, NULL)); + if (nkeys != 0 && + (rrsig.algorithm != algorithm || + rrsig.keyid != keyid)) + { + if (rrsig.algorithm == algorithm) { + has_alg = true; + } + continue; + } + CHECK(update_one_rr(db, version, diff, + DNS_DIFFOP_DELRESIGN, name, + rdataset.ttl, &rdata)); + } + dns_rdataset_disassociate(&rdataset); + if (result != ISC_R_NOMORE) + break; + + /* + * After deleting, if there's still a signature for + * 'algorithm', set alg_found; if not, set alg_missed. + */ + if (has_alg) { + alg_found = true; + } else { + alg_missed = true; + } + } + if (result == ISC_R_NOMORE) + result = ISC_R_SUCCESS; + + /* + * Set `has_algp` if the algorithm was found in every RRset: + * i.e., found in at least one, and not missing from any. + */ + *has_algp = (alg_found && !alg_missed); + failure: + if (dns_rdataset_isassociated(&rdataset)) + dns_rdataset_disassociate(&rdataset); + dns_rdatasetiter_destroy(&iterator); + return (result); +} + +/* + * Incrementally sign the zone using the keys requested. + * Builds the NSEC chain if required. + */ +static void +zone_sign(dns_zone_t *zone) { + const char *me = "zone_sign"; + dns_db_t *db = NULL; + dns_dbnode_t *node = NULL; + dns_dbversion_t *version = NULL; + dns_diff_t _sig_diff; + dns_diff_t post_diff; + dns__zonediff_t zonediff; + dns_fixedname_t fixed; + dns_fixedname_t nextfixed; + dns_name_t *name, *nextname; + dns_rdataset_t rdataset; + dns_signing_t *signing, *nextsigning; + dns_signinglist_t cleanup; + dst_key_t *zone_keys[DNS_MAXZONEKEYS]; + int32_t signatures; + bool check_ksk, keyset_kskonly, is_ksk; + bool with_ksk, with_zsk; + bool commit = false; + bool is_bottom_of_zone; + bool build_nsec = false; + bool build_nsec3 = false; + bool first; + isc_result_t result; + isc_stdtime_t now, inception, soaexpire, expire; + uint32_t jitter, sigvalidityinterval, expiryinterval; + unsigned int i, j; + unsigned int nkeys = 0; + uint32_t nodes; + + ENTER; + + dns_rdataset_init(&rdataset); + name = dns_fixedname_initname(&fixed); + nextname = dns_fixedname_initname(&nextfixed); + dns_diff_init(zone->mctx, &_sig_diff); + dns_diff_init(zone->mctx, &post_diff); + zonediff_init(&zonediff, &_sig_diff); + ISC_LIST_INIT(cleanup); + + /* + * Updates are disabled. Pause for 5 minutes. + */ + if (zone->update_disabled) { + result = ISC_R_FAILURE; + goto failure; + } + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) + dns_db_attach(zone->db, &db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + if (db == NULL) { + result = ISC_R_FAILURE; + goto failure; + } + + result = dns_db_newversion(db, &version); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_sign:dns_db_newversion -> %s", + dns_result_totext(result)); + goto failure; + } + + isc_stdtime_get(&now); + + result = dns__zone_findkeys(zone, db, version, now, zone->mctx, + DNS_MAXZONEKEYS, zone_keys, &nkeys); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_sign:dns__zone_findkeys -> %s", + dns_result_totext(result)); + goto failure; + } + + sigvalidityinterval = dns_zone_getsigvalidityinterval(zone); + inception = now - 3600; /* Allow for clock skew. */ + soaexpire = now + sigvalidityinterval; + expiryinterval = dns_zone_getsigresigninginterval(zone); + if (expiryinterval > sigvalidityinterval) { + expiryinterval = sigvalidityinterval; + } else { + expiryinterval = sigvalidityinterval - expiryinterval; + } + + /* + * Spread out signatures over time if they happen to be + * clumped. We don't do this for each add_sigs() call as + * we still want some clustering to occur. + */ + if (sigvalidityinterval >= 3600U) { + isc_random_get(&jitter); + if (sigvalidityinterval > 7200U) { + jitter %= expiryinterval; + } else { + jitter %= 1200; + } + expire = soaexpire - jitter - 1; + } else { + expire = soaexpire - 1; + } + + /* + * We keep pulling nodes off each iterator in turn until + * we have no more nodes to pull off or we reach the limits + * for this quantum. + */ + nodes = zone->nodes; + signatures = zone->signatures; + signing = ISC_LIST_HEAD(zone->signing); + first = true; + + check_ksk = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_UPDATECHECKKSK); + keyset_kskonly = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_DNSKEYKSKONLY); + + /* Determine which type of chain to build */ + CHECK(dns_private_chains(db, version, zone->privatetype, + &build_nsec, &build_nsec3)); + + /* If neither chain is found, default to NSEC */ + if (!build_nsec && !build_nsec3) + build_nsec = true; + + while (signing != NULL && nodes-- > 0 && signatures > 0) { + bool has_alg = false; + nextsigning = ISC_LIST_NEXT(signing, link); + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (signing->done || signing->db != zone->db) { + /* + * The zone has been reloaded. We will have + * created new signings as part of the reload + * process so we can destroy this one. + */ + ISC_LIST_UNLINK(zone->signing, signing, link); + ISC_LIST_APPEND(cleanup, signing, link); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + goto next_signing; + } + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + + if (signing->db != db) + goto next_signing; + + is_bottom_of_zone = false; + + if (first && signing->deleteit) { + /* + * Remove the key we are deleting from consideration. + */ + for (i = 0, j = 0; i < nkeys; i++) { + /* + * Find the key we want to remove. + */ + if (ALG(zone_keys[i]) == signing->algorithm && + dst_key_id(zone_keys[i]) == signing->keyid) + { + if (KSK(zone_keys[i])) + dst_key_free(&zone_keys[i]); + continue; + } + zone_keys[j] = zone_keys[i]; + j++; + } + for (i = j; i < nkeys; i++) { + zone_keys[i] = NULL; + } + nkeys = j; + } + + dns_dbiterator_current(signing->dbiterator, &node, name); + + if (signing->deleteit) { + dns_dbiterator_pause(signing->dbiterator); + CHECK(del_sig(db, version, name, node, nkeys, + signing->algorithm, signing->keyid, + &has_alg, zonediff.diff)); + } + + /* + * On the first pass we need to check if the current node + * has not been obscured. + */ + if (first) { + dns_fixedname_t ffound; + dns_name_t *found; + found = dns_fixedname_initname(&ffound); + result = dns_db_find(db, name, version, + dns_rdatatype_soa, + DNS_DBFIND_NOWILD, 0, NULL, found, + NULL, NULL); + if ((result == DNS_R_DELEGATION || + result == DNS_R_DNAME) && + !dns_name_equal(name, found)) { + /* + * Remember the obscuring name so that + * we skip all obscured names. + */ + dns_name_copy(found, name, NULL); + is_bottom_of_zone = true; + goto next_node; + } + } + + /* + * Process one node. + */ + with_ksk = false; + with_zsk = false; + dns_dbiterator_pause(signing->dbiterator); + + CHECK(check_if_bottom_of_zone(db, node, version, + &is_bottom_of_zone)); + + for (i = 0; !has_alg && i < nkeys; i++) { + bool both = false; + + /* + * Find the keys we want to sign with. + */ + if (!dst_key_isprivate(zone_keys[i])) + continue; + /* + * Should be redundant. + */ + if (dst_key_inactive(zone_keys[i])) + continue; + + /* + * When adding look for the specific key. + */ + if (!signing->deleteit && + (dst_key_alg(zone_keys[i]) != signing->algorithm || + dst_key_id(zone_keys[i]) != signing->keyid)) + continue; + + /* + * When deleting make sure we are properly signed + * with the algorithm that was being removed. + */ + if (signing->deleteit && + ALG(zone_keys[i]) != signing->algorithm) + continue; + + /* + * Do we do KSK processing? + */ + if (check_ksk && !REVOKE(zone_keys[i])) { + bool have_ksk, have_nonksk; + if (KSK(zone_keys[i])) { + have_ksk = true; + have_nonksk = false; + } else { + have_ksk = false; + have_nonksk = true; + } + for (j = 0; j < nkeys; j++) { + if (j == i || + ALG(zone_keys[i]) != + ALG(zone_keys[j])) + continue; + if (!dst_key_isprivate(zone_keys[j])) + continue; + /* + * Should be redundant. + */ + if (dst_key_inactive(zone_keys[j])) + continue; + if (REVOKE(zone_keys[j])) + continue; + if (KSK(zone_keys[j])) + have_ksk = true; + else + have_nonksk = true; + both = have_ksk && have_nonksk; + if (both) + break; + } + } + if (both || REVOKE(zone_keys[i])) + is_ksk = KSK(zone_keys[i]); + else + is_ksk = false; + + /* + * If deleting signatures, we need to ensure that + * the RRset is still signed at least once by a + * KSK and a ZSK. + */ + if (signing->deleteit && !is_ksk && with_zsk) { + continue; + } + + if (signing->deleteit && is_ksk && with_ksk) { + continue; + } + + CHECK(sign_a_node(db, name, node, version, build_nsec3, + build_nsec, zone_keys[i], inception, + expire, zone->minimum, is_ksk, + (both && keyset_kskonly), + is_bottom_of_zone, zonediff.diff, + &signatures, zone->mctx)); + /* + * If we are adding we are done. Look for other keys + * of the same algorithm if deleting. + */ + if (!signing->deleteit) { + break; + } + if (!is_ksk) { + with_zsk = true; + } + if (KSK(zone_keys[i])) { + with_ksk = true; + } + } + + /* + * Go onto next node. + */ + next_node: + first = false; + dns_db_detachnode(db, &node); + do { + result = dns_dbiterator_next(signing->dbiterator); + if (result == ISC_R_NOMORE) { + ISC_LIST_UNLINK(zone->signing, signing, link); + ISC_LIST_APPEND(cleanup, signing, link); + dns_dbiterator_pause(signing->dbiterator); + if (nkeys != 0 && build_nsec) { + /* + * We have finished regenerating the + * zone with a zone signing key. + * The NSEC chain is now complete and + * there is a full set of signatures + * for the zone. We can now clear the + * OPT bit from the NSEC record. + */ + result = updatesecure(db, version, + &zone->origin, + zone->minimum, + false, + &post_diff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, + ISC_LOG_ERROR, + "updatesecure -> %s", + dns_result_totext(result)); + goto failure; + } + } + result = updatesignwithkey(zone, signing, + version, + build_nsec3, + zone->minimum, + &post_diff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "updatesignwithkey -> %s", + dns_result_totext(result)); + goto failure; + } + build_nsec = false; + goto next_signing; + } else if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_sign:dns_dbiterator_next -> %s", + dns_result_totext(result)); + goto failure; + } else if (is_bottom_of_zone) { + dns_dbiterator_current(signing->dbiterator, + &node, nextname); + dns_db_detachnode(db, &node); + if (!dns_name_issubdomain(nextname, name)) + break; + } else + break; + } while (1); + continue; + + next_signing: + dns_dbiterator_pause(signing->dbiterator); + signing = nextsigning; + first = true; + } + + if (ISC_LIST_HEAD(post_diff.tuples) != NULL) { + result = dns__zone_updatesigs(&post_diff, db, version, + zone_keys, nkeys, zone, + inception, expire, now, + check_ksk, keyset_kskonly, + &zonediff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, "zone_sign:" + "dns__zone_updatesigs -> %s", + dns_result_totext(result)); + goto failure; + } + } + + /* + * Have we changed anything? + */ + if (ISC_LIST_EMPTY(zonediff.diff->tuples)) { + if (zonediff.offline) + commit = true; + result = ISC_R_SUCCESS; + goto pauseall; + } + + commit = true; + + result = del_sigs(zone, db, version, &zone->origin, dns_rdatatype_soa, + &zonediff, zone_keys, nkeys, now, false); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_sign:del_sigs -> %s", + dns_result_totext(result)); + goto failure; + } + + result = update_soa_serial(db, version, zonediff.diff, zone->mctx, + zone->updatemethod); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_sign:update_soa_serial -> %s", + dns_result_totext(result)); + goto failure; + } + + /* + * Generate maximum life time signatures so that the above loop + * termination is sensible. + */ + result = add_sigs(db, version, &zone->origin, dns_rdatatype_soa, + zonediff.diff, zone_keys, nkeys, zone->mctx, + inception, soaexpire, check_ksk, keyset_kskonly); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_sign:add_sigs -> %s", + dns_result_totext(result)); + goto failure; + } + + /* + * Write changes to journal file. + */ + CHECK(zone_journal(zone, zonediff.diff, NULL, "zone_sign")); + + pauseall: + /* + * Pause all iterators so that dns_db_closeversion() can succeed. + */ + for (signing = ISC_LIST_HEAD(zone->signing); + signing != NULL; + signing = ISC_LIST_NEXT(signing, link)) + dns_dbiterator_pause(signing->dbiterator); + + for (signing = ISC_LIST_HEAD(cleanup); + signing != NULL; + signing = ISC_LIST_NEXT(signing, link)) + dns_dbiterator_pause(signing->dbiterator); + + /* + * Everything has succeeded. Commit the changes. + */ + dns_db_closeversion(db, &version, commit); + + /* + * Everything succeeded so we can clean these up now. + */ + signing = ISC_LIST_HEAD(cleanup); + while (signing != NULL) { + ISC_LIST_UNLINK(cleanup, signing, link); + dns_db_detach(&signing->db); + dns_dbiterator_destroy(&signing->dbiterator); + isc_mem_put(zone->mctx, signing, sizeof *signing); + signing = ISC_LIST_HEAD(cleanup); + } + + set_resigntime(zone); + + if (commit) { + LOCK_ZONE(zone); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY); + zone_needdump(zone, DNS_DUMP_DELAY); + UNLOCK_ZONE(zone); + } + + failure: + /* + * Pause all dbiterators. + */ + for (signing = ISC_LIST_HEAD(zone->signing); + signing != NULL; + signing = ISC_LIST_NEXT(signing, link)) + dns_dbiterator_pause(signing->dbiterator); + + /* + * Rollback the cleanup list. + */ + signing = ISC_LIST_HEAD(cleanup); + while (signing != NULL) { + ISC_LIST_UNLINK(cleanup, signing, link); + ISC_LIST_PREPEND(zone->signing, signing, link); + dns_dbiterator_first(signing->dbiterator); + dns_dbiterator_pause(signing->dbiterator); + signing = ISC_LIST_HEAD(cleanup); + } + + dns_diff_clear(&_sig_diff); + + for (i = 0; i < nkeys; i++) + dst_key_free(&zone_keys[i]); + + if (node != NULL) + dns_db_detachnode(db, &node); + + if (version != NULL) { + dns_db_closeversion(db, &version, false); + dns_db_detach(&db); + } else if (db != NULL) + dns_db_detach(&db); + + if (ISC_LIST_HEAD(zone->signing) != NULL) { + isc_interval_t interval; + if (zone->update_disabled || result != ISC_R_SUCCESS) + isc_interval_set(&interval, 60, 0); /* 1 minute */ + else + isc_interval_set(&interval, 0, 10000000); /* 10 ms */ + isc_time_nowplusinterval(&zone->signingtime, &interval); + } else + isc_time_settoepoch(&zone->signingtime); + + INSIST(version == NULL); +} + +static isc_result_t +normalize_key(dns_rdata_t *rr, dns_rdata_t *target, + unsigned char *data, int size) +{ + dns_rdata_dnskey_t dnskey; + dns_rdata_keydata_t keydata; + isc_buffer_t buf; + isc_result_t result; + + dns_rdata_reset(target); + isc_buffer_init(&buf, data, size); + + switch (rr->type) { + case dns_rdatatype_dnskey: + result = dns_rdata_tostruct(rr, &dnskey, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + dnskey.flags &= ~DNS_KEYFLAG_REVOKE; + dns_rdata_fromstruct(target, rr->rdclass, dns_rdatatype_dnskey, + &dnskey, &buf); + break; + case dns_rdatatype_keydata: + result = dns_rdata_tostruct(rr, &keydata, NULL); + if (result == ISC_R_UNEXPECTEDEND) + return (result); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + dns_keydata_todnskey(&keydata, &dnskey, NULL); + dns_rdata_fromstruct(target, rr->rdclass, dns_rdatatype_dnskey, + &dnskey, &buf); + break; + default: + INSIST(0); + } + return (ISC_R_SUCCESS); +} + +/* + * 'rdset' contains either a DNSKEY rdataset from the zone apex, or + * a KEYDATA rdataset from the key zone. + * + * 'rr' contains either a DNSKEY record, or a KEYDATA record + * + * After normalizing keys to the same format (DNSKEY, with revoke bit + * cleared), return true if a key that matches 'rr' is found in + * 'rdset', or false if not. + */ + +static bool +matchkey(dns_rdataset_t *rdset, dns_rdata_t *rr) { + unsigned char data1[4096], data2[4096]; + dns_rdata_t rdata, rdata1, rdata2; + isc_result_t result; + + dns_rdata_init(&rdata); + dns_rdata_init(&rdata1); + dns_rdata_init(&rdata2); + + result = normalize_key(rr, &rdata1, data1, sizeof(data1)); + if (result != ISC_R_SUCCESS) + return (false); + + for (result = dns_rdataset_first(rdset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(rdset)) { + dns_rdata_reset(&rdata); + dns_rdataset_current(rdset, &rdata); + result = normalize_key(&rdata, &rdata2, data2, sizeof(data2)); + if (result != ISC_R_SUCCESS) + continue; + if (dns_rdata_compare(&rdata1, &rdata2) == 0) + return (true); + } + + return (false); +} + +/* + * Calculate the refresh interval for a keydata zone, per + * RFC5011: MAX(1 hr, + * MIN(15 days, + * 1/2 * OrigTTL, + * 1/2 * RRSigExpirationInterval)) + * or for retries: MAX(1 hr, + * MIN(1 day, + * 1/10 * OrigTTL, + * 1/10 * RRSigExpirationInterval)) + */ +static inline isc_stdtime_t +refresh_time(dns_keyfetch_t *kfetch, bool retry) { + isc_result_t result; + uint32_t t; + dns_rdataset_t *rdset; + dns_rdata_t sigrr = DNS_RDATA_INIT; + dns_rdata_sig_t sig; + isc_stdtime_t now; + + isc_stdtime_get(&now); + + if (dns_rdataset_isassociated(&kfetch->dnskeysigset)) + rdset = &kfetch->dnskeysigset; + else + return (now + dns_zone_mkey_hour); + + result = dns_rdataset_first(rdset); + if (result != ISC_R_SUCCESS) + return (now + dns_zone_mkey_hour); + + dns_rdataset_current(rdset, &sigrr); + result = dns_rdata_tostruct(&sigrr, &sig, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + if (!retry) { + t = sig.originalttl / 2; + + if (isc_serial_gt(sig.timeexpire, now)) { + uint32_t exp = (sig.timeexpire - now) / 2; + if (t > exp) + t = exp; + } + + if (t > (15 * dns_zone_mkey_day)) + t = (15 * dns_zone_mkey_day); + + if (t < dns_zone_mkey_hour) + t = dns_zone_mkey_hour; + } else { + t = sig.originalttl / 10; + + if (isc_serial_gt(sig.timeexpire, now)) { + uint32_t exp = (sig.timeexpire - now) / 10; + if (t > exp) + t = exp; + } + + if (t > dns_zone_mkey_day) + t = dns_zone_mkey_day; + + if (t < dns_zone_mkey_hour) + t = dns_zone_mkey_hour; + } + + return (now + t); +} + +/* + * This routine is called when no changes are needed in a KEYDATA + * record except to simply update the refresh timer. Caller should + * hold zone lock. + */ +static isc_result_t +minimal_update(dns_keyfetch_t *kfetch, dns_dbversion_t *ver, dns_diff_t *diff) +{ + isc_result_t result; + isc_buffer_t keyb; + unsigned char key_buf[4096]; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdata_keydata_t keydata; + dns_name_t *name; + dns_zone_t *zone = kfetch->zone; + isc_stdtime_t now; + + name = dns_fixedname_name(&kfetch->name); + isc_stdtime_get(&now); + + for (result = dns_rdataset_first(&kfetch->keydataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&kfetch->keydataset)) { + dns_rdata_reset(&rdata); + dns_rdataset_current(&kfetch->keydataset, &rdata); + + /* Delete old version */ + CHECK(update_one_rr(kfetch->db, ver, diff, DNS_DIFFOP_DEL, + name, 0, &rdata)); + + /* Update refresh timer */ + result = dns_rdata_tostruct(&rdata, &keydata, NULL); + if (result == ISC_R_UNEXPECTEDEND) + continue; + if (result != ISC_R_SUCCESS) + goto failure; + keydata.refresh = refresh_time(kfetch, true); + set_refreshkeytimer(zone, &keydata, now, false); + + dns_rdata_reset(&rdata); + isc_buffer_init(&keyb, key_buf, sizeof(key_buf)); + CHECK(dns_rdata_fromstruct(&rdata, + zone->rdclass, dns_rdatatype_keydata, + &keydata, &keyb)); + + /* Insert updated version */ + CHECK(update_one_rr(kfetch->db, ver, diff, DNS_DIFFOP_ADD, + name, 0, &rdata)); + } + result = ISC_R_SUCCESS; + failure: + return (result); +} + +/* + * Verify that DNSKEY set is signed by the key specified in 'keydata'. + */ +static bool +revocable(dns_keyfetch_t *kfetch, dns_rdata_keydata_t *keydata) { + isc_result_t result; + dns_name_t *keyname; + isc_mem_t *mctx; + dns_rdata_t sigrr = DNS_RDATA_INIT; + dns_rdata_t rr = DNS_RDATA_INIT; + dns_rdata_rrsig_t sig; + dns_rdata_dnskey_t dnskey; + dst_key_t *dstkey = NULL; + unsigned char key_buf[4096]; + isc_buffer_t keyb; + bool answer = false; + + REQUIRE(kfetch != NULL && keydata != NULL); + REQUIRE(dns_rdataset_isassociated(&kfetch->dnskeysigset)); + + keyname = dns_fixedname_name(&kfetch->name); + mctx = kfetch->zone->view->mctx; + + /* Generate a key from keydata */ + isc_buffer_init(&keyb, key_buf, sizeof(key_buf)); + dns_keydata_todnskey(keydata, &dnskey, NULL); + dns_rdata_fromstruct(&rr, keydata->common.rdclass, + dns_rdatatype_dnskey, &dnskey, &keyb); + result = dns_dnssec_keyfromrdata(keyname, &rr, mctx, &dstkey); + if (result != ISC_R_SUCCESS) + return (false); + + /* See if that key generated any of the signatures */ + for (result = dns_rdataset_first(&kfetch->dnskeysigset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&kfetch->dnskeysigset)) + { + dns_fixedname_t fixed; + dns_fixedname_init(&fixed); + + dns_rdata_reset(&sigrr); + dns_rdataset_current(&kfetch->dnskeysigset, &sigrr); + result = dns_rdata_tostruct(&sigrr, &sig, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + if (dst_key_alg(dstkey) == sig.algorithm && + dst_key_rid(dstkey) == sig.keyid) + { + result = dns_dnssec_verify2(keyname, + &kfetch->dnskeyset, + dstkey, false, mctx, &sigrr, + dns_fixedname_name(&fixed)); + + dns_zone_log(kfetch->zone, ISC_LOG_DEBUG(3), + "Confirm revoked DNSKEY is self-signed: " + "%s", dns_result_totext(result)); + + if (result == ISC_R_SUCCESS) { + answer = true; + break; + } + } + } + + dst_key_free(&dstkey); + return (answer); +} + +/* + * A DNSKEY set has been fetched from the zone apex of a zone whose trust + * anchors are being managed; scan the keyset, and update the key zone and the + * local trust anchors according to RFC5011. + */ +static void +keyfetch_done(isc_task_t *task, isc_event_t *event) { + isc_result_t result, eresult; + dns_fetchevent_t *devent; + dns_keyfetch_t *kfetch; + dns_zone_t *zone; + isc_mem_t *mctx = NULL; + dns_keytable_t *secroots = NULL; + dns_dbversion_t *ver = NULL; + dns_diff_t diff; + bool alldone = false; + bool commit = false; + dns_name_t *keyname; + dns_rdata_t sigrr = DNS_RDATA_INIT; + dns_rdata_t dnskeyrr = DNS_RDATA_INIT; + dns_rdata_t keydatarr = DNS_RDATA_INIT; + dns_rdata_rrsig_t sig; + dns_rdata_dnskey_t dnskey; + dns_rdata_keydata_t keydata; + bool initializing; + char namebuf[DNS_NAME_FORMATSIZE]; + unsigned char key_buf[4096]; + isc_buffer_t keyb; + dst_key_t *dstkey; + isc_stdtime_t now; + int pending = 0; + bool secure = false; + bool free_needed; + + UNUSED(task); + INSIST(event != NULL && event->ev_type == DNS_EVENT_FETCHDONE); + INSIST(event->ev_arg != NULL); + + kfetch = event->ev_arg; + zone = kfetch->zone; + isc_mem_attach(zone->mctx, &mctx); + keyname = dns_fixedname_name(&kfetch->name); + + devent = (dns_fetchevent_t *) event; + eresult = devent->result; + + /* Free resources which are not of interest */ + if (devent->node != NULL) + dns_db_detachnode(devent->db, &devent->node); + if (devent->db != NULL) + dns_db_detach(&devent->db); + isc_event_free(&event); + dns_resolver_destroyfetch(&kfetch->fetch); + + LOCK_ZONE(zone); + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING) || zone->view == NULL) + goto cleanup; + + isc_stdtime_get(&now); + dns_name_format(keyname, namebuf, sizeof(namebuf)); + + result = dns_view_getsecroots(zone->view, &secroots); + INSIST(result == ISC_R_SUCCESS); + + dns_diff_init(mctx, &diff); + + CHECK(dns_db_newversion(kfetch->db, &ver)); + + zone->refreshkeycount--; + alldone = (zone->refreshkeycount == 0); + + if (alldone) + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESHING); + + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "Returned from key fetch in keyfetch_done() for " + "'%s': %s", namebuf, dns_result_totext(eresult)); + + /* Fetch failed */ + if (eresult != ISC_R_SUCCESS || + !dns_rdataset_isassociated(&kfetch->dnskeyset)) { + dns_zone_log(zone, ISC_LOG_WARNING, + "Unable to fetch DNSKEY set " + "'%s': %s", namebuf, dns_result_totext(eresult)); + CHECK(minimal_update(kfetch, ver, &diff)); + goto done; + } + + /* No RRSIGs found */ + if (!dns_rdataset_isassociated(&kfetch->dnskeysigset)) { + dns_zone_log(zone, ISC_LOG_WARNING, + "No DNSKEY RRSIGs found for " + "'%s': %s", namebuf, dns_result_totext(eresult)); + CHECK(minimal_update(kfetch, ver, &diff)); + goto done; + } + + /* + * Clear any cached trust level, as we need to run validation + * over again; trusted keys might have changed. + */ + kfetch->dnskeyset.trust = kfetch->dnskeysigset.trust = dns_trust_none; + + /* + * Validate the dnskeyset against the current trusted keys. + */ + for (result = dns_rdataset_first(&kfetch->dnskeysigset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&kfetch->dnskeysigset)) { + dns_keynode_t *keynode = NULL; + + dns_rdata_reset(&sigrr); + dns_rdataset_current(&kfetch->dnskeysigset, &sigrr); + result = dns_rdata_tostruct(&sigrr, &sig, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + result = dns_keytable_find(secroots, keyname, &keynode); + while (result == ISC_R_SUCCESS) { + dns_keynode_t *nextnode = NULL; + dns_fixedname_t fixed; + dns_fixedname_init(&fixed); + + dstkey = dns_keynode_key(keynode); + if (dstkey == NULL) /* fail_secure() was called */ + break; + + if (dst_key_alg(dstkey) == sig.algorithm && + dst_key_id(dstkey) == sig.keyid) { + result = dns_dnssec_verify2(keyname, + &kfetch->dnskeyset, + dstkey, false, + zone->view->mctx, &sigrr, + dns_fixedname_name(&fixed)); + + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "Verifying DNSKEY set for zone " + "'%s' using key %d/%d: %s", + namebuf, sig.keyid, sig.algorithm, + dns_result_totext(result)); + + if (result == ISC_R_SUCCESS) { + kfetch->dnskeyset.trust = + dns_trust_secure; + kfetch->dnskeysigset.trust = + dns_trust_secure; + break; + } + } + + result = dns_keytable_nextkeynode(secroots, + keynode, &nextnode); + dns_keytable_detachkeynode(secroots, &keynode); + keynode = nextnode; + } + + if (keynode != NULL) + dns_keytable_detachkeynode(secroots, &keynode); + + if (kfetch->dnskeyset.trust == dns_trust_secure) { + secure = true; + break; + } + } + + /* + * If we were not able to verify the answer using the current + * trusted keys then all we can do is look at any revoked keys. + */ + + if (!secure) { + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "DNSKEY set for zone '%s' could not be verified " + "with current keys", namebuf); + } + + /* + * First scan keydataset to find keys that are not in dnskeyset + * - Missing keys which are not scheduled for removal, + * log a warning + * - Missing keys which are scheduled for removal and + * the remove hold-down timer has completed should + * be removed from the key zone + * - Missing keys whose acceptance timers have not yet + * completed, log a warning and reset the acceptance + * timer to 30 days in the future + * - All keys not being removed have their refresh timers + * updated + */ + initializing = true; + for (result = dns_rdataset_first(&kfetch->keydataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&kfetch->keydataset)) + { + dns_keytag_t keytag; + + dns_rdata_reset(&keydatarr); + dns_rdataset_current(&kfetch->keydataset, &keydatarr); + result = dns_rdata_tostruct(&keydatarr, &keydata, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + dns_keydata_todnskey(&keydata, &dnskey, NULL); + result = compute_tag(keyname, &dnskey, mctx, &keytag); + if (result != ISC_R_SUCCESS) { + /* + * Skip if we cannot compute the key tag. + * This may happen if the algorithm is unsupported + */ + dns_zone_log(zone, ISC_LOG_ERROR, + "Cannot compute tag for key in zone %s: %s " + "(skipping)", + namebuf, dns_result_totext(result)); + continue; + } + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + /* + * If any keydata record has a nonzero add holddown, then + * there was a pre-existing trust anchor for this domain; + * that means we are *not* initializing it and shouldn't + * automatically trust all the keys we find at the zone apex. + */ + initializing = initializing && (keydata.addhd == 0); + + if (! matchkey(&kfetch->dnskeyset, &keydatarr)) { + bool deletekey = false; + + if (!secure) { + if (keydata.removehd != 0 && + keydata.removehd <= now) { + deletekey = true; + } + } else if (keydata.addhd == 0) { + deletekey = true; + } else if (keydata.addhd > now) { + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "Pending key %d for zone %s " + "unexpectedly missing " + "restarting 30-day acceptance " + "timer", keytag, namebuf); + if (keydata.addhd < now + dns_zone_mkey_month) + keydata.addhd = + now + dns_zone_mkey_month; + keydata.refresh = refresh_time(kfetch, + false); + } else if (keydata.removehd == 0) { + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "Active key %d for zone %s " + "unexpectedly missing", + keytag, namebuf); + keydata.refresh = now + dns_zone_mkey_hour; + } else if (keydata.removehd <= now) { + deletekey = true; + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "Revoked key %d for zone %s " + "missing: deleting from " + "managed keys database", + keytag, namebuf); + } else { + keydata.refresh = refresh_time(kfetch, + false); + } + + if (secure || deletekey) { + /* Delete old version */ + CHECK(update_one_rr(kfetch->db, ver, &diff, + DNS_DIFFOP_DEL, keyname, 0, + &keydatarr)); + } + + if (!secure || deletekey) + continue; + + dns_rdata_reset(&keydatarr); + isc_buffer_init(&keyb, key_buf, sizeof(key_buf)); + dns_rdata_fromstruct(&keydatarr, zone->rdclass, + dns_rdatatype_keydata, + &keydata, &keyb); + + /* Insert updated version */ + CHECK(update_one_rr(kfetch->db, ver, &diff, + DNS_DIFFOP_ADD, keyname, 0, + &keydatarr)); + + set_refreshkeytimer(zone, &keydata, now, false); + } + } + + /* + * Next scan dnskeyset: + * - If new keys are found (i.e., lacking a match in keydataset) + * add them to the key zone and set the acceptance timer + * to 30 days in the future (or to immediately if we've + * determined that we're initializing the zone for the + * first time) + * - Previously-known keys that have been revoked + * must be scheduled for removal from the key zone (or, + * if they hadn't been accepted as trust anchors yet + * anyway, removed at once) + * - Previously-known unrevoked keys whose acceptance timers + * have completed are promoted to trust anchors + * - All keys not being removed have their refresh + * timers updated + */ + for (result = dns_rdataset_first(&kfetch->dnskeyset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&kfetch->dnskeyset)) + { + bool revoked = false; + bool newkey = false; + bool updatekey = false; + bool deletekey = false; + bool trustkey = false; + dns_keytag_t keytag; + + dns_rdata_reset(&dnskeyrr); + dns_rdataset_current(&kfetch->dnskeyset, &dnskeyrr); + result = dns_rdata_tostruct(&dnskeyrr, &dnskey, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + /* Skip ZSK's */ + if (!(dnskey.flags & DNS_KEYFLAG_KSK)) + continue; + + result = compute_tag(keyname, &dnskey, mctx, &keytag); + if (result != ISC_R_SUCCESS) { + /* + * Skip if we cannot compute the key tag. + * This may happen if the algorithm is unsupported + */ + dns_zone_log(zone, ISC_LOG_ERROR, + "Cannot compute tag for key in zone %s: %s " + "(skipping)", + namebuf, dns_result_totext(result)); + continue; + } + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + revoked = (dnskey.flags & DNS_KEYFLAG_REVOKE); + + if (matchkey(&kfetch->keydataset, &dnskeyrr)) { + dns_rdata_reset(&keydatarr); + dns_rdataset_current(&kfetch->keydataset, &keydatarr); + result = dns_rdata_tostruct(&keydatarr, &keydata, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + if (revoked && revocable(kfetch, &keydata)) { + if (keydata.addhd > now) { + /* + * Key wasn't trusted yet, and now + * it's been revoked? Just remove it + */ + deletekey = true; + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "Pending key %d " + "for zone %s is now " + "revoked: " + "deleting from the " + "managed keys database", + keytag, namebuf); + } else if (keydata.removehd == 0) { + /* + * Remove key from secroots. + */ + dns_view_untrust(zone->view, keyname, + &dnskey, mctx); + + /* If initializing, delete now */ + if (keydata.addhd == 0) + deletekey = true; + else { + keydata.removehd = now + + dns_zone_mkey_month; + keydata.flags |= + DNS_KEYFLAG_REVOKE; + } + + dns_zone_log(zone, ISC_LOG_INFO, + "Trusted key %d " + "for zone %s is now " + "revoked", + keytag, namebuf); + } else if (keydata.removehd < now) { + /* Scheduled for removal */ + deletekey = true; + + dns_zone_log(zone, ISC_LOG_INFO, + "Revoked key %d " + "for zone %s removal " + "timer complete: " + "deleting from the " + "managed keys database", + keytag, namebuf); + } + } else if (revoked && keydata.removehd == 0) { + dns_zone_log(zone, ISC_LOG_WARNING, + "Active key %d for zone " + "%s is revoked but " + "did not self-sign; " + "ignoring", keytag, namebuf); + continue; + } else if (secure) { + if (keydata.removehd != 0) { + /* + * Key isn't revoked--but it + * seems it used to be. + * Remove it now and add it + * back as if it were a fresh key, + * with a 30-day acceptance timer. + */ + deletekey = true; + newkey = true; + keydata.removehd = 0; + keydata.addhd = + now + dns_zone_mkey_month; + + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "Revoked key %d " + "for zone %s " + "has returned: starting " + "30-day acceptance timer", + keytag, namebuf); + } else if (keydata.addhd > now) + pending++; + else if (keydata.addhd == 0) + keydata.addhd = now; + + if (keydata.addhd <= now) { + trustkey = true; + dns_zone_log(zone, ISC_LOG_INFO, + "Key %d for zone %s " + "acceptance timer " + "complete: " + "key now trusted", + keytag, namebuf); + } + } else if (keydata.addhd > now) { + /* + * Not secure, and key is pending: + * reset the acceptance timer + */ + pending++; + keydata.addhd = now + dns_zone_mkey_month; + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "Pending key %d " + "for zone %s was " + "not validated: restarting " + "30-day acceptance timer", + keytag, namebuf); + } + + if (!deletekey && !newkey) + updatekey = true; + } else if (secure) { + /* + * Key wasn't in the key zone but it's + * revoked now anyway, so just skip it + */ + if (revoked) + continue; + + /* Key wasn't in the key zone: add it */ + newkey = true; + + if (initializing) { + dns_zone_log(zone, ISC_LOG_WARNING, + "Initializing automatic trust " + "anchor management for zone '%s'; " + "DNSKEY ID %d is now trusted, " + "waiving the normal 30-day " + "waiting period.", + namebuf, keytag); + trustkey = true; + } else { + dns_zone_log(zone, ISC_LOG_INFO, + "New key %d observed " + "for zone '%s': " + "starting 30-day " + "acceptance timer", + keytag, namebuf); + } + } else { + /* + * No previously known key, and the key is not + * secure, so skip it. + */ + continue; + } + + /* Delete old version */ + if (deletekey || !newkey) + CHECK(update_one_rr(kfetch->db, ver, &diff, + DNS_DIFFOP_DEL, keyname, 0, + &keydatarr)); + + if (updatekey) { + /* Set refresh timer */ + keydata.refresh = refresh_time(kfetch, false); + dns_rdata_reset(&keydatarr); + isc_buffer_init(&keyb, key_buf, sizeof(key_buf)); + dns_rdata_fromstruct(&keydatarr, zone->rdclass, + dns_rdatatype_keydata, + &keydata, &keyb); + + /* Insert updated version */ + CHECK(update_one_rr(kfetch->db, ver, &diff, + DNS_DIFFOP_ADD, keyname, 0, + &keydatarr)); + } else if (newkey) { + /* Convert DNSKEY to KEYDATA */ + result = dns_rdata_tostruct(&dnskeyrr, &dnskey, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + dns_keydata_fromdnskey(&keydata, &dnskey, 0, 0, 0, + NULL); + keydata.addhd = initializing + ? now : now + dns_zone_mkey_month; + keydata.refresh = refresh_time(kfetch, false); + dns_rdata_reset(&keydatarr); + isc_buffer_init(&keyb, key_buf, sizeof(key_buf)); + dns_rdata_fromstruct(&keydatarr, zone->rdclass, + dns_rdatatype_keydata, + &keydata, &keyb); + + /* Insert into key zone */ + CHECK(update_one_rr(kfetch->db, ver, &diff, + DNS_DIFFOP_ADD, keyname, 0, + &keydatarr)); + } + + if (trustkey) { + /* Trust this key. */ + result = dns_rdata_tostruct(&dnskeyrr, &dnskey, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + trust_key(zone, keyname, &dnskey, mctx); + } + + if (secure && !deletekey) { + INSIST(newkey || updatekey); + set_refreshkeytimer(zone, &keydata, now, false); + } + } + + /* + * RFC5011 says, "A trust point that has all of its trust anchors + * revoked is considered deleted and is treated as if the trust + * point was never configured." But if someone revoked their + * active key before the standby was trusted, that would mean the + * zone would suddenly be nonsecured. We avoid this by checking to + * see if there's pending keydata. If so, we put a null key in + * the security roots; then all queries to the zone will fail. + */ + if (pending != 0) + fail_secure(zone, keyname); + + done: + + if (!ISC_LIST_EMPTY(diff.tuples)) { + /* Write changes to journal file. */ + CHECK(update_soa_serial(kfetch->db, ver, &diff, mctx, + zone->updatemethod)); + CHECK(zone_journal(zone, &diff, NULL, "keyfetch_done")); + commit = true; + + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED); + zone_needdump(zone, 30); + } else if (result == ISC_R_NOMORE) { + /* + * If "updatekey" was true for all keys found in the DNSKEY + * response and the previous update of those keys happened + * during the same second (only possible if a key refresh was + * externally triggered), it may happen that all relevant + * update_one_rr() calls will return ISC_R_SUCCESS, but + * diff.tuples will remain empty. Reset result to + * ISC_R_SUCCESS to prevent a bogus warning from being logged. + */ + result = ISC_R_SUCCESS; + } + + failure: + + dns_diff_clear(&diff); + if (ver != NULL) + dns_db_closeversion(kfetch->db, &ver, commit); + + cleanup: + dns_db_detach(&kfetch->db); + + INSIST(zone->irefs > 0); + zone->irefs--; + kfetch->zone = NULL; + + if (dns_rdataset_isassociated(&kfetch->keydataset)) + dns_rdataset_disassociate(&kfetch->keydataset); + if (dns_rdataset_isassociated(&kfetch->dnskeyset)) + dns_rdataset_disassociate(&kfetch->dnskeyset); + if (dns_rdataset_isassociated(&kfetch->dnskeysigset)) + dns_rdataset_disassociate(&kfetch->dnskeysigset); + + dns_name_free(keyname, mctx); + isc_mem_put(mctx, kfetch, sizeof(dns_keyfetch_t)); + isc_mem_detach(&mctx); + + if (secroots != NULL) + dns_keytable_detach(&secroots); + + free_needed = exit_check(zone); + UNLOCK_ZONE(zone); + if (free_needed) + zone_free(zone); + + INSIST(ver == NULL); +} + +/* + * Refresh the data in the key zone. Initiate a fetch to get new DNSKEY + * records from the zone apex. + */ +static void +zone_refreshkeys(dns_zone_t *zone) { + const char me[] = "zone_refreshkeys"; + isc_result_t result; + dns_rriterator_t rrit; + dns_db_t *db = NULL; + dns_dbversion_t *ver = NULL; + dns_diff_t diff; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdata_keydata_t kd; + isc_stdtime_t now; + bool commit = false; + bool fetching = false, fetch_err = false; + + ENTER; + REQUIRE(zone->db != NULL); + + isc_stdtime_get(&now); + + LOCK_ZONE(zone); + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) { + isc_time_settoepoch(&zone->refreshkeytime); + UNLOCK_ZONE(zone); + return; + } + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + dns_db_attach(zone->db, &db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + + dns_diff_init(zone->mctx, &diff); + + CHECK(dns_db_newversion(db, &ver)); + + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_REFRESHING); + + dns_rriterator_init(&rrit, db, ver, 0); + for (result = dns_rriterator_first(&rrit); + result == ISC_R_SUCCESS; + result = dns_rriterator_nextrrset(&rrit)) { + isc_stdtime_t timer = 0xffffffff; + dns_name_t *name = NULL, *kname = NULL; + dns_rdataset_t *kdset = NULL; + dns_keyfetch_t *kfetch; + uint32_t ttl; + + dns_rriterator_current(&rrit, &name, &ttl, &kdset, NULL); + if (kdset == NULL || kdset->type != dns_rdatatype_keydata || + !dns_rdataset_isassociated(kdset)) + continue; + + /* + * Scan the stored keys looking for ones that need + * removal or refreshing + */ + for (result = dns_rdataset_first(kdset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(kdset)) { + dns_rdata_reset(&rdata); + dns_rdataset_current(kdset, &rdata); + result = dns_rdata_tostruct(&rdata, &kd, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + /* Removal timer expired? */ + if (kd.removehd != 0 && kd.removehd < now) { + CHECK(update_one_rr(db, ver, &diff, + DNS_DIFFOP_DEL, name, ttl, + &rdata)); + continue; + } + + /* Acceptance timer expired? */ + if (kd.addhd <= now) + timer = kd.addhd; + + /* Or do we just need to refresh the keyset? */ + if (timer > kd.refresh) + timer = kd.refresh; + } + + if (timer > now) + continue; + + kfetch = isc_mem_get(zone->mctx, sizeof(dns_keyfetch_t)); + if (kfetch == NULL) { + fetch_err = true; + goto failure; + } + + zone->refreshkeycount++; + kfetch->zone = zone; + zone->irefs++; + INSIST(zone->irefs != 0); + kname = dns_fixedname_initname(&kfetch->name); + dns_name_dup(name, zone->mctx, kname); + dns_rdataset_init(&kfetch->dnskeyset); + dns_rdataset_init(&kfetch->dnskeysigset); + dns_rdataset_init(&kfetch->keydataset); + dns_rdataset_clone(kdset, &kfetch->keydataset); + kfetch->db = NULL; + dns_db_attach(db, &kfetch->db); + kfetch->fetch = NULL; + + if (isc_log_wouldlog(dns_lctx, ISC_LOG_DEBUG(3))) { + char namebuf[DNS_NAME_FORMATSIZE]; + dns_name_format(kname, namebuf, + sizeof(namebuf)); + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "Creating key fetch in " + "zone_refreshkeys() for '%s'", + namebuf); + } + + /* + * Use of DNS_FETCHOPT_NOCACHED is essential here. If it is + * not set and the cache still holds a non-expired, validated + * version of the RRset being queried for by the time the + * response is received, the cached RRset will be passed to + * keyfetch_done() instead of the one received in the response + * as the latter will have a lower trust level due to not being + * validated until keyfetch_done() is called. + */ + +#ifdef ENABLE_AFL + if (dns_fuzzing_resolver == false) { +#endif + result = dns_resolver_createfetch(zone->view->resolver, + kname, dns_rdatatype_dnskey, + NULL, NULL, NULL, + DNS_FETCHOPT_NOVALIDATE| + DNS_FETCHOPT_UNSHARED| + DNS_FETCHOPT_NOCACHED, + zone->task, + keyfetch_done, kfetch, + &kfetch->dnskeyset, + &kfetch->dnskeysigset, + &kfetch->fetch); +#ifdef ENABLE_AFL + } else { + result = ISC_R_FAILURE; + } +#endif + if (result == ISC_R_SUCCESS) + fetching = true; + else { + zone->refreshkeycount--; + zone->irefs--; + dns_db_detach(&kfetch->db); + dns_rdataset_disassociate(&kfetch->keydataset); + dns_name_free(kname, zone->mctx); + isc_mem_put(zone->mctx, kfetch, sizeof(dns_keyfetch_t)); + dns_zone_log(zone, ISC_LOG_WARNING, + "Failed to create fetch for " + "DNSKEY update"); + fetch_err = true; + } + } + if (!ISC_LIST_EMPTY(diff.tuples)) { + CHECK(update_soa_serial(db, ver, &diff, zone->mctx, + zone->updatemethod)); + CHECK(zone_journal(zone, &diff, NULL, "zone_refreshkeys")); + commit = true; + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED); + zone_needdump(zone, 30); + } + + failure: + if (fetch_err) { + /* + * Error during a key fetch; retry in an hour. + */ + isc_time_t timenow, timethen; + char timebuf[80]; + + TIME_NOW(&timenow); + DNS_ZONE_TIME_ADD(&timenow, dns_zone_mkey_hour, &timethen); + zone->refreshkeytime = timethen; + zone_settimer(zone, &timenow); + + isc_time_formattimestamp(&zone->refreshkeytime, timebuf, 80); + dns_zone_log(zone, ISC_LOG_DEBUG(1), "retry key refresh: %s", + timebuf); + } + + if (!fetching) + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESHING); + + dns_diff_clear(&diff); + if (ver != NULL) { + dns_rriterator_destroy(&rrit); + dns_db_closeversion(db, &ver, commit); + } + dns_db_detach(&db); + + UNLOCK_ZONE(zone); + + INSIST(ver == NULL); +} + +static void +zone_maintenance(dns_zone_t *zone) { + const char me[] = "zone_maintenance"; + isc_time_t now; + isc_result_t result; + bool dumping, load_pending; + + REQUIRE(DNS_ZONE_VALID(zone)); + ENTER; + + /* + * Are we pending load/reload? + */ + LOCK_ZONE(zone); + load_pending = DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADPENDING); + UNLOCK_ZONE(zone); + + if (load_pending) { + return; + } + + /* + * Configuring the view of this zone may have + * failed, for example because the config file + * had a syntax error. In that case, the view + * adb or resolver will be NULL, and we had better not try + * to do further maintenance on it. + */ + if (zone->view == NULL || zone->view->adb == NULL) + return; + + TIME_NOW(&now); + + /* + * Expire check. + */ + switch (zone->type) { + case dns_zone_redirect: + if (zone->masters == NULL) + break; + /* FALLTHROUGH */ + case dns_zone_slave: + case dns_zone_stub: + LOCK_ZONE(zone); + if (isc_time_compare(&now, &zone->expiretime) >= 0 && + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) { + zone_expire(zone); + zone->refreshtime = now; + } + UNLOCK_ZONE(zone); + break; + default: + break; + } + + /* + * Up to date check. + */ + switch (zone->type) { + case dns_zone_redirect: + if (zone->masters == NULL) + break; + /* FALLTHROUGH */ + case dns_zone_slave: + case dns_zone_stub: + if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH) && + isc_time_compare(&now, &zone->refreshtime) >= 0) + dns_zone_refresh(zone); + break; + default: + break; + } + + /* + * Slaves send notifies before backing up to disk, masters after. + */ + if (zone->type == dns_zone_slave && + (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDNOTIFY) || + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDSTARTUPNOTIFY)) && + isc_time_compare(&now, &zone->notifytime) >= 0) + zone_notify(zone, &now); + + /* + * Do we need to consolidate the backing store? + */ + switch (zone->type) { + case dns_zone_master: + case dns_zone_slave: + case dns_zone_key: + case dns_zone_redirect: + case dns_zone_stub: + LOCK_ZONE(zone); + if (zone->masterfile != NULL && + isc_time_compare(&now, &zone->dumptime) >= 0 && + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) && + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP)) { + dumping = was_dumping(zone); + } else + dumping = true; + UNLOCK_ZONE(zone); + if (!dumping) { + result = zone_dump(zone, true); /* task locked */ + if (result != ISC_R_SUCCESS) + dns_zone_log(zone, ISC_LOG_WARNING, + "dump failed: %s", + dns_result_totext(result)); + } + break; + default: + break; + } + + /* + * Master/redirect zones send notifies now, if needed + */ + switch (zone->type) { + case dns_zone_master: + case dns_zone_redirect: + if ((DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDNOTIFY) || + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDSTARTUPNOTIFY))&& + isc_time_compare(&now, &zone->notifytime) >= 0) + zone_notify(zone, &now); + default: + break; + } + + /* + * Do we need to refresh keys? + */ + switch (zone->type) { + case dns_zone_key: + if (isc_time_compare(&now, &zone->refreshkeytime) >= 0) { + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESHING)) { + zone_refreshkeys(zone); + } + } + break; + case dns_zone_master: + if (!isc_time_isepoch(&zone->refreshkeytime) && + isc_time_compare(&now, &zone->refreshkeytime) >= 0 && + zone->rss_event == NULL) + zone_rekey(zone); + default: + break; + } + + switch (zone->type) { + case dns_zone_master: + case dns_zone_redirect: + case dns_zone_slave: + /* + * Do we need to sign/resign some RRsets? + */ + if (zone->rss_event != NULL) + break; + if (!isc_time_isepoch(&zone->signingtime) && + isc_time_compare(&now, &zone->signingtime) >= 0) + zone_sign(zone); + else if (!isc_time_isepoch(&zone->resigntime) && + isc_time_compare(&now, &zone->resigntime) >= 0) + zone_resigninc(zone); + else if (!isc_time_isepoch(&zone->nsec3chaintime) && + isc_time_compare(&now, &zone->nsec3chaintime) >= 0) + zone_nsec3chain(zone); + /* + * Do we need to issue a key expiry warning? + */ + if (!isc_time_isepoch(&zone->keywarntime) && + isc_time_compare(&now, &zone->keywarntime) >= 0) + set_key_expiry_warning(zone, zone->key_expiry, + isc_time_seconds(&now)); + break; + + default: + break; + } + zone_settimer(zone, &now); +} + +void +dns_zone_markdirty(dns_zone_t *zone) { + uint32_t serial; + isc_result_t result = ISC_R_SUCCESS; + dns_zone_t *secure = NULL; + + /* + * Obtaining a lock on the zone->secure (see zone_send_secureserial) + * could result in a deadlock due to a LOR so we will spin if we + * can't obtain the both locks. + */ + again: + LOCK_ZONE(zone); + if (zone->type == dns_zone_master) { + if (inline_raw(zone)) { + unsigned int soacount; + secure = zone->secure; + INSIST(secure != zone); + TRYLOCK_ZONE(result, secure); + if (result != ISC_R_SUCCESS) { + UNLOCK_ZONE(zone); + secure = NULL; +#ifdef ISC_PLATFORM_USETHREADS + isc_thread_yield(); +#endif + goto again; + } + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) { + result = zone_get_from_db(zone, zone->db, NULL, + &soacount, &serial, + NULL, NULL, NULL, + NULL, NULL); + } else + result = DNS_R_NOTLOADED; + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + if (result == ISC_R_SUCCESS && soacount > 0U) + zone_send_secureserial(zone, serial); + } + + /* XXXMPA make separate call back */ + if (result == ISC_R_SUCCESS) + set_resigntime(zone); + } + if (secure != NULL) + UNLOCK_ZONE(secure); + zone_needdump(zone, DNS_DUMP_DELAY); + UNLOCK_ZONE(zone); +} + +void +dns_zone_expire(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone_expire(zone); + UNLOCK_ZONE(zone); +} + +static void +zone_expire(dns_zone_t *zone) { + /* + * 'zone' locked by caller. + */ + + REQUIRE(LOCKED_ZONE(zone)); + + dns_zone_log(zone, ISC_LOG_WARNING, "expired"); + + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_EXPIRED); + zone->refresh = DNS_ZONE_DEFAULTREFRESH; + zone->retry = DNS_ZONE_DEFAULTRETRY; + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_HAVETIMERS); + zone_unload(zone); +} + +void +dns_zone_refresh(dns_zone_t *zone) { + isc_interval_t i; + uint32_t oldflags; + unsigned int j; + isc_result_t result; + + REQUIRE(DNS_ZONE_VALID(zone)); + + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) + return; + + /* + * Set DNS_ZONEFLG_REFRESH so that there is only one refresh operation + * in progress at a time. + */ + + LOCK_ZONE(zone); + oldflags = zone->flags; + if (zone->masterscnt == 0) { + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOMASTERS); + if ((oldflags & DNS_ZONEFLG_NOMASTERS) == 0) + dns_zone_log(zone, ISC_LOG_ERROR, + "cannot refresh: no masters"); + goto unlock; + } + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_REFRESH); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NOEDNS); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC); + if ((oldflags & (DNS_ZONEFLG_REFRESH|DNS_ZONEFLG_LOADING)) != 0) + goto unlock; + + /* + * Set the next refresh time as if refresh check has failed. + * Setting this to the retry time will do that. XXXMLG + * If we are successful it will be reset using zone->refresh. + */ + isc_interval_set(&i, isc_random_jitter(zone->retry, zone->retry / 4), + 0); + result = isc_time_nowplusinterval(&zone->refreshtime, &i); + if (result != ISC_R_SUCCESS) + dns_zone_log(zone, ISC_LOG_WARNING, + "isc_time_nowplusinterval() failed: %s", + dns_result_totext(result)); + + /* + * When lacking user-specified timer values from the SOA, + * do exponential backoff of the retry time up to a + * maximum of six hours. + */ + if (! DNS_ZONE_FLAG(zone, DNS_ZONEFLG_HAVETIMERS)) + zone->retry = ISC_MIN(zone->retry * 2, 6 * 3600); + + zone->curmaster = 0; + for (j = 0; j < zone->masterscnt; j++) + zone->mastersok[j] = false; + /* initiate soa query */ + queue_soa_query(zone); + unlock: + UNLOCK_ZONE(zone); +} + +isc_result_t +dns_zone_flush(dns_zone_t *zone) { + isc_result_t result = ISC_R_SUCCESS; + bool dumping; + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_FLUSH); + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) && + zone->masterfile != NULL) { + result = ISC_R_ALREADYRUNNING; + dumping = was_dumping(zone); + } else + dumping = true; + UNLOCK_ZONE(zone); + if (!dumping) + result = zone_dump(zone, false); /* Unknown task. */ + return (result); +} + +isc_result_t +dns_zone_dump(dns_zone_t *zone) { + isc_result_t result = ISC_R_ALREADYRUNNING; + bool dumping; + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + dumping = was_dumping(zone); + UNLOCK_ZONE(zone); + if (!dumping) + result = zone_dump(zone, false); /* Unknown task. */ + return (result); +} + +static void +zone_needdump(dns_zone_t *zone, unsigned int delay) { + const char me[] = "zone_needdump"; + isc_time_t dumptime; + isc_time_t now; + + /* + * 'zone' locked by caller + */ + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(LOCKED_ZONE(zone)); + ENTER; + + /* + * Do we have a place to dump to and are we loaded? + */ + if (zone->masterfile == NULL || + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) == 0) + return; + + TIME_NOW(&now); + /* add some noise */ + DNS_ZONE_JITTER_ADD(&now, delay, &dumptime); + + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDDUMP); + if (isc_time_isepoch(&zone->dumptime) || + isc_time_compare(&zone->dumptime, &dumptime) > 0) + zone->dumptime = dumptime; + if (zone->task != NULL) + zone_settimer(zone, &now); +} + +static void +dump_done(void *arg, isc_result_t result) { + const char me[] = "dump_done"; + dns_zone_t *zone = arg; + dns_zone_t *secure = NULL; + dns_db_t *db; + dns_dbversion_t *version; + bool again = false; + bool compact = false; + uint32_t serial; + isc_result_t tresult; + + REQUIRE(DNS_ZONE_VALID(zone)); + + ENTER; + + if (result == ISC_R_SUCCESS && zone->journal != NULL && + zone->journalsize != -1) { + /* + * We don't own these, zone->dctx must stay valid. + */ + db = dns_dumpctx_db(zone->dctx); + version = dns_dumpctx_version(zone->dctx); + tresult = dns_db_getsoaserial(db, version, &serial); + + /* + * Handle lock order inversion. + */ + again: + LOCK_ZONE(zone); + if (inline_raw(zone)) { + secure = zone->secure; + INSIST(secure != zone); + TRYLOCK_ZONE(result, secure); + if (result != ISC_R_SUCCESS) { + UNLOCK_ZONE(zone); + secure = NULL; +#if ISC_PLATFORM_USETHREADS + isc_thread_yield(); +#endif + goto again; + } + } + + /* + * If there is a secure version of this zone + * use its serial if it is less than ours. + */ + if (tresult == ISC_R_SUCCESS && secure != NULL) { + uint32_t sserial; + isc_result_t mresult; + + ZONEDB_LOCK(&secure->dblock, isc_rwlocktype_read); + if (secure->db != NULL) { + mresult = dns_db_getsoaserial(zone->secure->db, + NULL, &sserial); + if (mresult == ISC_R_SUCCESS && + isc_serial_lt(sserial, serial)) + serial = sserial; + } + ZONEDB_UNLOCK(&secure->dblock, isc_rwlocktype_read); + } + if (secure != NULL) + UNLOCK_ZONE(secure); + UNLOCK_ZONE(zone); + + /* + * Note: we are task locked here so we can test + * zone->xfr safely. + */ + if (tresult == ISC_R_SUCCESS && zone->xfr == NULL) { + tresult = dns_journal_compact(zone->mctx, + zone->journal, + serial, + zone->journalsize); + switch (tresult) { + case ISC_R_SUCCESS: + case ISC_R_NOSPACE: + case ISC_R_NOTFOUND: + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "dns_journal_compact: %s", + dns_result_totext(tresult)); + break; + default: + dns_zone_log(zone, ISC_LOG_ERROR, + "dns_journal_compact failed: %s", + dns_result_totext(tresult)); + break; + } + } else if (tresult == ISC_R_SUCCESS) { + compact = true; + zone->compact_serial = serial; + } + } + + LOCK_ZONE(zone); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_DUMPING); + if (compact) + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDCOMPACT); + if (result != ISC_R_SUCCESS && result != ISC_R_CANCELED) { + /* + * Try again in a short while. + */ + zone_needdump(zone, DNS_DUMP_DELAY); + } else if (result == ISC_R_SUCCESS && + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FLUSH) && + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) && + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) { + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDDUMP); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DUMPING); + isc_time_settoepoch(&zone->dumptime); + again = true; + } else if (result == ISC_R_SUCCESS) + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_FLUSH); + + if (zone->dctx != NULL) + dns_dumpctx_detach(&zone->dctx); + zonemgr_putio(&zone->writeio); + UNLOCK_ZONE(zone); + if (again) + (void)zone_dump(zone, false); + dns_zone_idetach(&zone); +} + +static isc_result_t +zone_dump(dns_zone_t *zone, bool compact) { + const char me[] = "zone_dump"; + isc_result_t result; + dns_dbversion_t *version = NULL; + bool again; + dns_db_t *db = NULL; + char *masterfile = NULL; + dns_masterformat_t masterformat = dns_masterformat_none; + +/* + * 'compact' MUST only be set if we are task locked. + */ + + REQUIRE(DNS_ZONE_VALID(zone)); + ENTER; + + redo: + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) + dns_db_attach(zone->db, &db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + LOCK_ZONE(zone); + if (zone->masterfile != NULL) { + masterfile = isc_mem_strdup(zone->mctx, zone->masterfile); + masterformat = zone->masterformat; + } + UNLOCK_ZONE(zone); + if (db == NULL) { + result = DNS_R_NOTLOADED; + goto fail; + } + if (masterfile == NULL) { + result = DNS_R_NOMASTERFILE; + goto fail; + } + + if (compact && zone->type != dns_zone_stub) { + dns_zone_t *dummy = NULL; + LOCK_ZONE(zone); + zone_iattach(zone, &dummy); + result = zonemgr_getio(zone->zmgr, false, zone->task, + zone_gotwritehandle, zone, + &zone->writeio); + if (result != ISC_R_SUCCESS) + zone_idetach(&dummy); + else + result = DNS_R_CONTINUE; + UNLOCK_ZONE(zone); + } else { + const dns_master_style_t *output_style; + + dns_masterrawheader_t rawdata; + dns_db_currentversion(db, &version); + dns_master_initrawheader(&rawdata); + if (inline_secure(zone)) + get_raw_serial(zone->raw, &rawdata); + if (zone->type == dns_zone_key) + output_style = &dns_master_style_keyzone; + else + output_style = &dns_master_style_default; + result = dns_master_dump3(zone->mctx, db, version, + output_style, masterfile, + masterformat, &rawdata); + dns_db_closeversion(db, &version, false); + } + fail: + if (db != NULL) + dns_db_detach(&db); + if (masterfile != NULL) + isc_mem_free(zone->mctx, masterfile); + masterfile = NULL; + + if (result == DNS_R_CONTINUE) + return (ISC_R_SUCCESS); /* XXXMPA */ + + again = false; + LOCK_ZONE(zone); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_DUMPING); + if (result != ISC_R_SUCCESS) { + /* + * Try again in a short while. + */ + zone_needdump(zone, DNS_DUMP_DELAY); + } else if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FLUSH) && + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) && + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) { + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDDUMP); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DUMPING); + isc_time_settoepoch(&zone->dumptime); + again = true; + } else + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_FLUSH); + UNLOCK_ZONE(zone); + if (again) + goto redo; + + return (result); +} + +static isc_result_t +dumptostream(dns_zone_t *zone, FILE *fd, const dns_master_style_t *style, + dns_masterformat_t format, const uint32_t rawversion) +{ + isc_result_t result; + dns_dbversion_t *version = NULL; + dns_db_t *db = NULL; + dns_masterrawheader_t rawdata; + + REQUIRE(DNS_ZONE_VALID(zone)); + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) + dns_db_attach(zone->db, &db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + if (db == NULL) + return (DNS_R_NOTLOADED); + + dns_db_currentversion(db, &version); + dns_master_initrawheader(&rawdata); + if (rawversion == 0) + rawdata.flags |= DNS_MASTERRAW_COMPAT; + else if (inline_secure(zone)) + get_raw_serial(zone->raw, &rawdata); + else if (zone->sourceserialset) { + rawdata.flags = DNS_MASTERRAW_SOURCESERIALSET; + rawdata.sourceserial = zone->sourceserial; + } + result = dns_master_dumptostream3(zone->mctx, db, version, style, + format, &rawdata, fd); + dns_db_closeversion(db, &version, false); + dns_db_detach(&db); + return (result); +} + +isc_result_t +dns_zone_dumptostream3(dns_zone_t *zone, FILE *fd, dns_masterformat_t format, + const dns_master_style_t *style, + const uint32_t rawversion) +{ + return (dumptostream(zone, fd, style, format, rawversion)); +} + +isc_result_t +dns_zone_dumptostream2(dns_zone_t *zone, FILE *fd, dns_masterformat_t format, + const dns_master_style_t *style) { + return (dumptostream(zone, fd, style, format, DNS_RAWFORMAT_VERSION)); +} + +isc_result_t +dns_zone_dumptostream(dns_zone_t *zone, FILE *fd) { + return (dumptostream(zone, fd, &dns_master_style_default, + dns_masterformat_text, 0)); +} + +isc_result_t +dns_zone_fulldumptostream(dns_zone_t *zone, FILE *fd) { + return (dumptostream(zone, fd, &dns_master_style_full, + dns_masterformat_text, 0)); +} + +void +dns_zone_unload(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone_unload(zone); + UNLOCK_ZONE(zone); +} + +static void +notify_cancel(dns_zone_t *zone) { + dns_notify_t *notify; + + /* + * 'zone' locked by caller. + */ + + REQUIRE(LOCKED_ZONE(zone)); + + for (notify = ISC_LIST_HEAD(zone->notifies); + notify != NULL; + notify = ISC_LIST_NEXT(notify, link)) { + if (notify->find != NULL) + dns_adb_cancelfind(notify->find); + if (notify->request != NULL) + dns_request_cancel(notify->request); + } +} + +static void +forward_cancel(dns_zone_t *zone) { + dns_forward_t *forward; + + /* + * 'zone' locked by caller. + */ + + REQUIRE(LOCKED_ZONE(zone)); + + for (forward = ISC_LIST_HEAD(zone->forwards); + forward != NULL; + forward = ISC_LIST_NEXT(forward, link)) { + if (forward->request != NULL) + dns_request_cancel(forward->request); + } +} + +static void +zone_unload(dns_zone_t *zone) { + /* + * 'zone' locked by caller. + */ + + REQUIRE(LOCKED_ZONE(zone)); + + if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FLUSH) || + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) { + if (zone->writeio != NULL) + zonemgr_cancelio(zone->writeio); + + if (zone->dctx != NULL) + dns_dumpctx_cancel(zone->dctx); + } + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write); + zone_detachdb(zone); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_LOADED); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDDUMP); +} + +void +dns_zone_setminrefreshtime(dns_zone_t *zone, uint32_t val) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(val > 0); + + zone->minrefresh = val; +} + +void +dns_zone_setmaxrefreshtime(dns_zone_t *zone, uint32_t val) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(val > 0); + + zone->maxrefresh = val; +} + +void +dns_zone_setminretrytime(dns_zone_t *zone, uint32_t val) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(val > 0); + + zone->minretry = val; +} + +void +dns_zone_setmaxretrytime(dns_zone_t *zone, uint32_t val) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(val > 0); + + zone->maxretry = val; +} + +uint32_t +dns_zone_getmaxrecords(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->maxrecords); +} + +void +dns_zone_setmaxrecords(dns_zone_t *zone, uint32_t val) { + REQUIRE(DNS_ZONE_VALID(zone)); + + zone->maxrecords = val; +} + +static bool +notify_isqueued(dns_zone_t *zone, unsigned int flags, dns_name_t *name, + isc_sockaddr_t *addr, dns_tsigkey_t *key) +{ + dns_notify_t *notify; + dns_zonemgr_t *zmgr; + isc_result_t result; + + for (notify = ISC_LIST_HEAD(zone->notifies); + notify != NULL; + notify = ISC_LIST_NEXT(notify, link)) { + if (notify->request != NULL) + continue; + if (name != NULL && dns_name_dynamic(¬ify->ns) && + dns_name_equal(name, ¬ify->ns)) + goto requeue; + if (addr != NULL && isc_sockaddr_equal(addr, ¬ify->dst) && + notify->key == key) + goto requeue; + } + return (false); + +requeue: + /* + * If we are enqueued on the startup ratelimiter and this is + * not a startup notify, re-enqueue on the normal notify + * ratelimiter. + */ + if (notify->event != NULL && (flags & DNS_NOTIFY_STARTUP) == 0 && + (notify->flags & DNS_NOTIFY_STARTUP) != 0) { + zmgr = notify->zone->zmgr; + result = isc_ratelimiter_dequeue(zmgr->startupnotifyrl, + notify->event); + if (result != ISC_R_SUCCESS) + return (true); + + notify->flags &= ~DNS_NOTIFY_STARTUP; + result = isc_ratelimiter_enqueue(notify->zone->zmgr->notifyrl, + notify->zone->task, + ¬ify->event); + if (result != ISC_R_SUCCESS) { + isc_event_free(¬ify->event); + return (false); + } + } + + return (true); +} + +static bool +notify_isself(dns_zone_t *zone, isc_sockaddr_t *dst) { + dns_tsigkey_t *key = NULL; + isc_sockaddr_t src; + isc_sockaddr_t any; + bool isself; + isc_netaddr_t dstaddr; + isc_result_t result; + + if (zone->view == NULL || zone->isself == NULL) + return (false); + + switch (isc_sockaddr_pf(dst)) { + case PF_INET: + src = zone->notifysrc4; + isc_sockaddr_any(&any); + break; + case PF_INET6: + src = zone->notifysrc6; + isc_sockaddr_any6(&any); + break; + default: + return (false); + } + + /* + * When sending from any the kernel will assign a source address + * that matches the destination address. + */ + if (isc_sockaddr_eqaddr(&any, &src)) + src = *dst; + + isc_netaddr_fromsockaddr(&dstaddr, dst); + result = dns_view_getpeertsig(zone->view, &dstaddr, &key); + if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) + return (false); + isself = (zone->isself)(zone->view, key, &src, dst, zone->rdclass, + zone->isselfarg); + if (key != NULL) + dns_tsigkey_detach(&key); + return (isself); +} + +static void +notify_destroy(dns_notify_t *notify, bool locked) { + isc_mem_t *mctx; + + REQUIRE(DNS_NOTIFY_VALID(notify)); + + if (notify->zone != NULL) { + if (!locked) + LOCK_ZONE(notify->zone); + REQUIRE(LOCKED_ZONE(notify->zone)); + if (ISC_LINK_LINKED(notify, link)) + ISC_LIST_UNLINK(notify->zone->notifies, notify, link); + if (!locked) + UNLOCK_ZONE(notify->zone); + if (locked) + zone_idetach(¬ify->zone); + else + dns_zone_idetach(¬ify->zone); + } + if (notify->find != NULL) + dns_adb_destroyfind(¬ify->find); + if (notify->request != NULL) + dns_request_destroy(¬ify->request); + if (dns_name_dynamic(¬ify->ns)) + dns_name_free(¬ify->ns, notify->mctx); + if (notify->key != NULL) + dns_tsigkey_detach(¬ify->key); + mctx = notify->mctx; + isc_mem_put(notify->mctx, notify, sizeof(*notify)); + isc_mem_detach(&mctx); +} + +static isc_result_t +notify_create(isc_mem_t *mctx, unsigned int flags, dns_notify_t **notifyp) { + dns_notify_t *notify; + + REQUIRE(notifyp != NULL && *notifyp == NULL); + + notify = isc_mem_get(mctx, sizeof(*notify)); + if (notify == NULL) + return (ISC_R_NOMEMORY); + + notify->mctx = NULL; + isc_mem_attach(mctx, ¬ify->mctx); + notify->flags = flags; + notify->zone = NULL; + notify->find = NULL; + notify->request = NULL; + notify->key = NULL; + notify->event = NULL; + isc_sockaddr_any(¬ify->dst); + dns_name_init(¬ify->ns, NULL); + ISC_LINK_INIT(notify, link); + notify->magic = NOTIFY_MAGIC; + *notifyp = notify; + return (ISC_R_SUCCESS); +} + +/* + * XXXAG should check for DNS_ZONEFLG_EXITING + */ +static void +process_adb_event(isc_task_t *task, isc_event_t *ev) { + dns_notify_t *notify; + isc_eventtype_t result; + + UNUSED(task); + + notify = ev->ev_arg; + REQUIRE(DNS_NOTIFY_VALID(notify)); + INSIST(task == notify->zone->task); + result = ev->ev_type; + isc_event_free(&ev); + if (result == DNS_EVENT_ADBMOREADDRESSES) { + dns_adb_destroyfind(¬ify->find); + notify_find_address(notify); + return; + } + if (result == DNS_EVENT_ADBNOMOREADDRESSES) { + LOCK_ZONE(notify->zone); + notify_send(notify); + UNLOCK_ZONE(notify->zone); + } + notify_destroy(notify, false); +} + +static void +notify_find_address(dns_notify_t *notify) { + isc_result_t result; + unsigned int options; + + REQUIRE(DNS_NOTIFY_VALID(notify)); + options = DNS_ADBFIND_WANTEVENT | DNS_ADBFIND_INET | + DNS_ADBFIND_INET6 | DNS_ADBFIND_RETURNLAME; + + if (notify->zone->view->adb == NULL) + goto destroy; + + result = dns_adb_createfind(notify->zone->view->adb, + notify->zone->task, + process_adb_event, notify, + ¬ify->ns, dns_rootname, 0, + options, 0, NULL, + notify->zone->view->dstport, + ¬ify->find); + + /* Something failed? */ + if (result != ISC_R_SUCCESS) + goto destroy; + + /* More addresses pending? */ + if ((notify->find->options & DNS_ADBFIND_WANTEVENT) != 0) + return; + + /* We have as many addresses as we can get. */ + LOCK_ZONE(notify->zone); + notify_send(notify); + UNLOCK_ZONE(notify->zone); + + destroy: + notify_destroy(notify, false); +} + + +static isc_result_t +notify_send_queue(dns_notify_t *notify, bool startup) { + isc_event_t *e; + isc_result_t result; + + INSIST(notify->event == NULL); + e = isc_event_allocate(notify->mctx, NULL, DNS_EVENT_NOTIFYSENDTOADDR, + notify_send_toaddr, notify, sizeof(isc_event_t)); + if (e == NULL) + return (ISC_R_NOMEMORY); + if (startup) + notify->event = e; + e->ev_arg = notify; + e->ev_sender = NULL; + result = isc_ratelimiter_enqueue(startup + ? notify->zone->zmgr->startupnotifyrl + : notify->zone->zmgr->notifyrl, + notify->zone->task, &e); + if (result != ISC_R_SUCCESS) { + isc_event_free(&e); + notify->event = NULL; + } + return (result); +} + +static void +notify_send_toaddr(isc_task_t *task, isc_event_t *event) { + dns_notify_t *notify; + isc_result_t result; + dns_message_t *message = NULL; + isc_netaddr_t dstip; + dns_tsigkey_t *key = NULL; + char addrbuf[ISC_SOCKADDR_FORMATSIZE]; + isc_sockaddr_t src; + unsigned int options, timeout; + bool have_notifysource = false; + bool have_notifydscp = false; + isc_dscp_t dscp = -1; + + notify = event->ev_arg; + REQUIRE(DNS_NOTIFY_VALID(notify)); + + UNUSED(task); + + LOCK_ZONE(notify->zone); + + notify->event = NULL; + + if (DNS_ZONE_FLAG(notify->zone, DNS_ZONEFLG_LOADED) == 0) { + result = ISC_R_CANCELED; + goto cleanup; + } + + if ((event->ev_attributes & ISC_EVENTATTR_CANCELED) != 0 || + DNS_ZONE_FLAG(notify->zone, DNS_ZONEFLG_EXITING) || + notify->zone->view->requestmgr == NULL || + notify->zone->db == NULL) { + result = ISC_R_CANCELED; + goto cleanup; + } + + /* + * The raw IPv4 address should also exist. Don't send to the + * mapped form. + */ + if (isc_sockaddr_pf(¬ify->dst) == PF_INET6 && + IN6_IS_ADDR_V4MAPPED(¬ify->dst.type.sin6.sin6_addr)) { + isc_sockaddr_format(¬ify->dst, addrbuf, sizeof(addrbuf)); + notify_log(notify->zone, ISC_LOG_DEBUG(3), + "notify: ignoring IPv6 mapped IPV4 address: %s", + addrbuf); + result = ISC_R_CANCELED; + goto cleanup; + } + + result = notify_createmessage(notify->zone, notify->flags, &message); + if (result != ISC_R_SUCCESS) + goto cleanup; + + isc_sockaddr_format(¬ify->dst, addrbuf, sizeof(addrbuf)); + if (notify->key != NULL) { + /* Transfer ownership of key */ + key = notify->key; + notify->key = NULL; + } else { + isc_netaddr_fromsockaddr(&dstip, ¬ify->dst); + result = dns_view_getpeertsig(notify->zone->view, &dstip, &key); + if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) { + notify_log(notify->zone, ISC_LOG_ERROR, + "NOTIFY to %s not sent. " + "Peer TSIG key lookup failure.", addrbuf); + goto cleanup_message; + } + } + + /* XXX: should we log the tsig key too? */ + notify_log(notify->zone, ISC_LOG_DEBUG(3), "sending notify to %s", + addrbuf); + options = 0; + if (notify->zone->view->peers != NULL) { + dns_peer_t *peer = NULL; + bool usetcp = false; + result = dns_peerlist_peerbyaddr(notify->zone->view->peers, + &dstip, &peer); + if (result == ISC_R_SUCCESS) { + result = dns_peer_getnotifysource(peer, &src); + if (result == ISC_R_SUCCESS) + have_notifysource = true; + dns_peer_getnotifydscp(peer, &dscp); + if (dscp != -1) + have_notifydscp = true; + result = dns_peer_getforcetcp(peer, &usetcp); + if (result == ISC_R_SUCCESS && usetcp) + options |= DNS_FETCHOPT_TCP; + } + } + switch (isc_sockaddr_pf(¬ify->dst)) { + case PF_INET: + if (!have_notifysource) + src = notify->zone->notifysrc4; + if (!have_notifydscp) + dscp = notify->zone->notifysrc4dscp; + break; + case PF_INET6: + if (!have_notifysource) + src = notify->zone->notifysrc6; + if (!have_notifydscp) + dscp = notify->zone->notifysrc6dscp; + break; + default: + result = ISC_R_NOTIMPLEMENTED; + goto cleanup_key; + } + timeout = 15; + if (DNS_ZONE_FLAG(notify->zone, DNS_ZONEFLG_DIALNOTIFY)) + timeout = 30; + result = dns_request_createvia4(notify->zone->view->requestmgr, + message, &src, ¬ify->dst, dscp, + options, key, timeout * 3, timeout, + 0, notify->zone->task, notify_done, + notify, ¬ify->request); + if (result == ISC_R_SUCCESS) { + if (isc_sockaddr_pf(¬ify->dst) == AF_INET) { + inc_stats(notify->zone, + dns_zonestatscounter_notifyoutv4); + } else { + inc_stats(notify->zone, + dns_zonestatscounter_notifyoutv6); + } + } + + cleanup_key: + if (key != NULL) + dns_tsigkey_detach(&key); + cleanup_message: + dns_message_destroy(&message); + cleanup: + UNLOCK_ZONE(notify->zone); + isc_event_free(&event); + if (result != ISC_R_SUCCESS) + notify_destroy(notify, false); +} + +static void +notify_send(dns_notify_t *notify) { + dns_adbaddrinfo_t *ai; + isc_sockaddr_t dst; + isc_result_t result; + dns_notify_t *newnotify = NULL; + unsigned int flags; + bool startup; + + /* + * Zone lock held by caller. + */ + REQUIRE(DNS_NOTIFY_VALID(notify)); + REQUIRE(LOCKED_ZONE(notify->zone)); + + if (DNS_ZONE_FLAG(notify->zone, DNS_ZONEFLG_EXITING)) + return; + + for (ai = ISC_LIST_HEAD(notify->find->list); + ai != NULL; + ai = ISC_LIST_NEXT(ai, publink)) { + dst = ai->sockaddr; + if (notify_isqueued(notify->zone, notify->flags, NULL, &dst, + NULL)) + continue; + if (notify_isself(notify->zone, &dst)) + continue; + newnotify = NULL; + flags = notify->flags & DNS_NOTIFY_NOSOA; + result = notify_create(notify->mctx, flags, &newnotify); + if (result != ISC_R_SUCCESS) + goto cleanup; + zone_iattach(notify->zone, &newnotify->zone); + ISC_LIST_APPEND(newnotify->zone->notifies, newnotify, link); + newnotify->dst = dst; + startup = (notify->flags & DNS_NOTIFY_STARTUP); + result = notify_send_queue(newnotify, startup); + if (result != ISC_R_SUCCESS) + goto cleanup; + newnotify = NULL; + } + + cleanup: + if (newnotify != NULL) + notify_destroy(newnotify, true); +} + +void +dns_zone_notify(dns_zone_t *zone) { + isc_time_t now; + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY); + + TIME_NOW(&now); + zone_settimer(zone, &now); + UNLOCK_ZONE(zone); +} + +static void +zone_notify(dns_zone_t *zone, isc_time_t *now) { + dns_dbnode_t *node = NULL; + dns_db_t *zonedb = NULL; + dns_dbversion_t *version = NULL; + dns_name_t *origin = NULL; + dns_name_t master; + dns_rdata_ns_t ns; + dns_rdata_soa_t soa; + uint32_t serial; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdataset_t nsrdset; + dns_rdataset_t soardset; + isc_result_t result; + unsigned int i; + isc_sockaddr_t dst; + bool isqueued; + dns_notifytype_t notifytype; + unsigned int flags = 0; + bool loggednotify = false; + bool startup; + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + startup = !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDNOTIFY); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDSTARTUPNOTIFY); + notifytype = zone->notifytype; + DNS_ZONE_TIME_ADD(now, zone->notifydelay, &zone->notifytime); + UNLOCK_ZONE(zone); + + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING) || + ! DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) + return; + + if (notifytype == dns_notifytype_no) + return; + + if (notifytype == dns_notifytype_masteronly && + zone->type != dns_zone_master) + return; + + origin = &zone->origin; + + /* + * If the zone is dialup we are done as we don't want to send + * the current soa so as to force a refresh query. + */ + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALNOTIFY)) + flags |= DNS_NOTIFY_NOSOA; + + /* + * Record that this was a notify due to starting up. + */ + if (startup) + flags |= DNS_NOTIFY_STARTUP; + + /* + * Get SOA RRset. + */ + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) + dns_db_attach(zone->db, &zonedb); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + if (zonedb == NULL) + return; + dns_db_currentversion(zonedb, &version); + result = dns_db_findnode(zonedb, origin, false, &node); + if (result != ISC_R_SUCCESS) + goto cleanup1; + + dns_rdataset_init(&soardset); + result = dns_db_findrdataset(zonedb, node, version, dns_rdatatype_soa, + dns_rdatatype_none, 0, &soardset, NULL); + if (result != ISC_R_SUCCESS) + goto cleanup2; + + /* + * Find serial and master server's name. + */ + dns_name_init(&master, NULL); + result = dns_rdataset_first(&soardset); + if (result != ISC_R_SUCCESS) + goto cleanup3; + dns_rdataset_current(&soardset, &rdata); + result = dns_rdata_tostruct(&rdata, &soa, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + dns_rdata_reset(&rdata); + result = dns_name_dup(&soa.origin, zone->mctx, &master); + serial = soa.serial; + dns_rdataset_disassociate(&soardset); + if (result != ISC_R_SUCCESS) + goto cleanup3; + + /* + * Enqueue notify requests for 'also-notify' servers. + */ + LOCK_ZONE(zone); + for (i = 0; i < zone->notifycnt; i++) { + dns_tsigkey_t *key = NULL; + dns_notify_t *notify = NULL; + + if ((zone->notifykeynames != NULL) && + (zone->notifykeynames[i] != NULL)) { + dns_view_t *view = dns_zone_getview(zone); + dns_name_t *keyname = zone->notifykeynames[i]; + (void)dns_view_gettsig(view, keyname, &key); + } + + dst = zone->notify[i]; + if (notify_isqueued(zone, flags, NULL, &dst, key)) { + if (key != NULL) + dns_tsigkey_detach(&key); + continue; + } + + result = notify_create(zone->mctx, flags, ¬ify); + if (result != ISC_R_SUCCESS) { + if (key != NULL) + dns_tsigkey_detach(&key); + continue; + } + + zone_iattach(zone, ¬ify->zone); + notify->dst = dst; + + INSIST(notify->key == NULL); + + if (key != NULL) { + notify->key = key; + key = NULL; + } + + ISC_LIST_APPEND(zone->notifies, notify, link); + result = notify_send_queue(notify, startup); + if (result != ISC_R_SUCCESS) + notify_destroy(notify, true); + if (!loggednotify) { + notify_log(zone, ISC_LOG_INFO, + "sending notifies (serial %u)", + serial); + loggednotify = true; + } + } + UNLOCK_ZONE(zone); + + if (notifytype == dns_notifytype_explicit) + goto cleanup3; + + /* + * Process NS RRset to generate notifies. + */ + + dns_rdataset_init(&nsrdset); + result = dns_db_findrdataset(zonedb, node, version, dns_rdatatype_ns, + dns_rdatatype_none, 0, &nsrdset, NULL); + if (result != ISC_R_SUCCESS) + goto cleanup3; + + result = dns_rdataset_first(&nsrdset); + while (result == ISC_R_SUCCESS) { + dns_notify_t *notify = NULL; + + dns_rdataset_current(&nsrdset, &rdata); + result = dns_rdata_tostruct(&rdata, &ns, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + dns_rdata_reset(&rdata); + /* + * Don't notify the master server unless explicitly + * configured to do so. + */ + if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_NOTIFYTOSOA) && + dns_name_compare(&master, &ns.name) == 0) { + result = dns_rdataset_next(&nsrdset); + continue; + } + + if (!loggednotify) { + notify_log(zone, ISC_LOG_INFO, + "sending notifies (serial %u)", + serial); + loggednotify = true; + } + + LOCK_ZONE(zone); + isqueued = notify_isqueued(zone, flags, &ns.name, NULL, NULL); + UNLOCK_ZONE(zone); + if (isqueued) { + result = dns_rdataset_next(&nsrdset); + continue; + } + result = notify_create(zone->mctx, flags, ¬ify); + if (result != ISC_R_SUCCESS) + continue; + dns_zone_iattach(zone, ¬ify->zone); + result = dns_name_dup(&ns.name, zone->mctx, ¬ify->ns); + if (result != ISC_R_SUCCESS) { + LOCK_ZONE(zone); + notify_destroy(notify, true); + UNLOCK_ZONE(zone); + continue; + } + LOCK_ZONE(zone); + ISC_LIST_APPEND(zone->notifies, notify, link); + UNLOCK_ZONE(zone); + notify_find_address(notify); + result = dns_rdataset_next(&nsrdset); + } + dns_rdataset_disassociate(&nsrdset); + + cleanup3: + if (dns_name_dynamic(&master)) + dns_name_free(&master, zone->mctx); + cleanup2: + dns_db_detachnode(zonedb, &node); + cleanup1: + dns_db_closeversion(zonedb, &version, false); + dns_db_detach(&zonedb); +} + +/*** + *** Private + ***/ + +static inline isc_result_t +save_nsrrset(dns_message_t *message, dns_name_t *name, + dns_db_t *db, dns_dbversion_t *version) +{ + dns_rdataset_t *nsrdataset = NULL; + dns_rdataset_t *rdataset = NULL; + dns_dbnode_t *node = NULL; + dns_rdata_ns_t ns; + isc_result_t result; + dns_rdata_t rdata = DNS_RDATA_INIT; + + /* + * Extract NS RRset from message. + */ + result = dns_message_findname(message, DNS_SECTION_ANSWER, name, + dns_rdatatype_ns, dns_rdatatype_none, + NULL, &nsrdataset); + if (result != ISC_R_SUCCESS) + goto fail; + + /* + * Add NS rdataset. + */ + result = dns_db_findnode(db, name, true, &node); + if (result != ISC_R_SUCCESS) + goto fail; + result = dns_db_addrdataset(db, node, version, 0, + nsrdataset, 0, NULL); + dns_db_detachnode(db, &node); + if (result != ISC_R_SUCCESS) + goto fail; + /* + * Add glue rdatasets. + */ + for (result = dns_rdataset_first(nsrdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(nsrdataset)) { + dns_rdataset_current(nsrdataset, &rdata); + result = dns_rdata_tostruct(&rdata, &ns, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + dns_rdata_reset(&rdata); + if (!dns_name_issubdomain(&ns.name, name)) + continue; + rdataset = NULL; + result = dns_message_findname(message, DNS_SECTION_ADDITIONAL, + &ns.name, dns_rdatatype_aaaa, + dns_rdatatype_none, NULL, + &rdataset); + if (result == ISC_R_SUCCESS) { + result = dns_db_findnode(db, &ns.name, + true, &node); + if (result != ISC_R_SUCCESS) + goto fail; + result = dns_db_addrdataset(db, node, version, 0, + rdataset, 0, NULL); + dns_db_detachnode(db, &node); + if (result != ISC_R_SUCCESS) + goto fail; + } + rdataset = NULL; + result = dns_message_findname(message, DNS_SECTION_ADDITIONAL, + &ns.name, dns_rdatatype_a, + dns_rdatatype_none, NULL, + &rdataset); + if (result == ISC_R_SUCCESS) { + result = dns_db_findnode(db, &ns.name, + true, &node); + if (result != ISC_R_SUCCESS) + goto fail; + result = dns_db_addrdataset(db, node, version, 0, + rdataset, 0, NULL); + dns_db_detachnode(db, &node); + if (result != ISC_R_SUCCESS) + goto fail; + } + } + if (result != ISC_R_NOMORE) + goto fail; + + return (ISC_R_SUCCESS); + +fail: + return (result); +} + +static void +stub_callback(isc_task_t *task, isc_event_t *event) { + const char me[] = "stub_callback"; + dns_requestevent_t *revent = (dns_requestevent_t *)event; + dns_stub_t *stub = NULL; + dns_message_t *msg = NULL; + dns_zone_t *zone = NULL; + char master[ISC_SOCKADDR_FORMATSIZE]; + char source[ISC_SOCKADDR_FORMATSIZE]; + uint32_t nscnt, cnamecnt, refresh, retry, expire; + isc_result_t result; + isc_time_t now; + bool exiting = false; + isc_interval_t i; + unsigned int j, soacount; + + stub = revent->ev_arg; + INSIST(DNS_STUB_VALID(stub)); + + UNUSED(task); + + zone = stub->zone; + + ENTER; + + TIME_NOW(&now); + + LOCK_ZONE(zone); + + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) { + zone_debuglog(zone, me, 1, "exiting"); + exiting = true; + goto next_master; + } + + isc_sockaddr_format(&zone->masteraddr, master, sizeof(master)); + isc_sockaddr_format(&zone->sourceaddr, source, sizeof(source)); + + if (revent->result != ISC_R_SUCCESS) { + if (revent->result == ISC_R_TIMEDOUT && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS)) { + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS); + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "refreshing stub: timeout retrying " + " without EDNS master %s (source %s)", + master, source); + goto same_master; + } + dns_zonemgr_unreachableadd(zone->zmgr, &zone->masteraddr, + &zone->sourceaddr, &now); + dns_zone_log(zone, ISC_LOG_INFO, + "could not refresh stub from master %s" + " (source %s): %s", master, source, + dns_result_totext(revent->result)); + goto next_master; + } + + result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTPARSE, &msg); + if (result != ISC_R_SUCCESS) + goto next_master; + + result = dns_request_getresponse(revent->request, msg, 0); + if (result != ISC_R_SUCCESS) + goto next_master; + + /* + * Unexpected rcode. + */ + if (msg->rcode != dns_rcode_noerror) { + char rcode[128]; + isc_buffer_t rb; + + isc_buffer_init(&rb, rcode, sizeof(rcode)); + (void)dns_rcode_totext(msg->rcode, &rb); + + if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS) && + (msg->rcode == dns_rcode_servfail || + msg->rcode == dns_rcode_notimp || + msg->rcode == dns_rcode_formerr)) { + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "refreshing stub: rcode (%.*s) retrying " + "without EDNS master %s (source %s)", + (int)rb.used, rcode, master, source); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS); + goto same_master; + } + + dns_zone_log(zone, ISC_LOG_INFO, + "refreshing stub: " + "unexpected rcode (%.*s) from %s (source %s)", + (int)rb.used, rcode, master, source); + goto next_master; + } + + /* + * We need complete messages. + */ + if ((msg->flags & DNS_MESSAGEFLAG_TC) != 0) { + if (dns_request_usedtcp(revent->request)) { + dns_zone_log(zone, ISC_LOG_INFO, + "refreshing stub: truncated TCP " + "response from master %s (source %s)", + master, source); + goto next_master; + } + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEVC); + goto same_master; + } + + /* + * If non-auth log and next master. + */ + if ((msg->flags & DNS_MESSAGEFLAG_AA) == 0) { + dns_zone_log(zone, ISC_LOG_INFO, "refreshing stub: " + "non-authoritative answer from " + "master %s (source %s)", master, source); + goto next_master; + } + + /* + * Sanity checks. + */ + cnamecnt = message_count(msg, DNS_SECTION_ANSWER, dns_rdatatype_cname); + nscnt = message_count(msg, DNS_SECTION_ANSWER, dns_rdatatype_ns); + + if (cnamecnt != 0) { + dns_zone_log(zone, ISC_LOG_INFO, + "refreshing stub: unexpected CNAME response " + "from master %s (source %s)", master, source); + goto next_master; + } + + if (nscnt == 0) { + dns_zone_log(zone, ISC_LOG_INFO, + "refreshing stub: no NS records in response " + "from master %s (source %s)", master, source); + goto next_master; + } + + /* + * Save answer. + */ + result = save_nsrrset(msg, &zone->origin, stub->db, stub->version); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_INFO, + "refreshing stub: unable to save NS records " + "from master %s (source %s)", master, source); + goto next_master; + } + + /* + * Tidy up. + */ + dns_db_closeversion(stub->db, &stub->version, true); + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write); + if (zone->db == NULL) + zone_attachdb(zone, stub->db); + result = zone_get_from_db(zone, zone->db, NULL, &soacount, NULL, + &refresh, &retry, &expire, NULL, NULL); + if (result == ISC_R_SUCCESS && soacount > 0U) { + zone->refresh = RANGE(refresh, zone->minrefresh, + zone->maxrefresh); + zone->retry = RANGE(retry, zone->minretry, zone->maxretry); + zone->expire = RANGE(expire, zone->refresh + zone->retry, + DNS_MAX_EXPIRE); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_HAVETIMERS); + } + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write); + dns_db_detach(&stub->db); + + dns_message_destroy(&msg); + isc_event_free(&event); + dns_request_destroy(&zone->request); + + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED); + DNS_ZONE_JITTER_ADD(&now, zone->refresh, &zone->refreshtime); + isc_interval_set(&i, zone->expire, 0); + DNS_ZONE_TIME_ADD(&now, zone->expire, &zone->expiretime); + + if (zone->masterfile != NULL) + zone_needdump(zone, 0); + + zone_settimer(zone, &now); + goto free_stub; + + next_master: + if (stub->version != NULL) + dns_db_closeversion(stub->db, &stub->version, false); + if (stub->db != NULL) + dns_db_detach(&stub->db); + if (msg != NULL) + dns_message_destroy(&msg); + isc_event_free(&event); + dns_request_destroy(&zone->request); + /* + * Skip to next failed / untried master. + */ + do { + zone->curmaster++; + } while (zone->curmaster < zone->masterscnt && + zone->mastersok[zone->curmaster]); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NOEDNS); + if (exiting || zone->curmaster >= zone->masterscnt) { + bool done = true; + if (!exiting && + DNS_ZONE_OPTION(zone, DNS_ZONEOPT_USEALTXFRSRC) && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) { + /* + * Did we get a good answer from all the masters? + */ + for (j = 0; j < zone->masterscnt; j++) + if (zone->mastersok[j] == false) { + done = false; + break; + } + } else + done = true; + if (!done) { + zone->curmaster = 0; + /* + * Find the next failed master. + */ + while (zone->curmaster < zone->masterscnt && + zone->mastersok[zone->curmaster]) + zone->curmaster++; + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC); + } else { + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH); + + zone_settimer(zone, &now); + goto free_stub; + } + } + queue_soa_query(zone); + goto free_stub; + + same_master: + if (msg != NULL) + dns_message_destroy(&msg); + isc_event_free(&event); + dns_request_destroy(&zone->request); + ns_query(zone, NULL, stub); + UNLOCK_ZONE(zone); + goto done; + + free_stub: + UNLOCK_ZONE(zone); + stub->magic = 0; + dns_zone_idetach(&stub->zone); + INSIST(stub->db == NULL); + INSIST(stub->version == NULL); + isc_mem_put(stub->mctx, stub, sizeof(*stub)); + + done: + INSIST(event == NULL); + return; +} + +/* + * Get the EDNS EXPIRE option from the response and if it exists trim + * expire to be not more than it. + */ +static void +get_edns_expire(dns_zone_t * zone, dns_message_t *message, + uint32_t *expirep) +{ + isc_result_t result; + uint32_t expire; + dns_rdata_t rdata = DNS_RDATA_INIT; + isc_buffer_t optbuf; + uint16_t optcode; + uint16_t optlen; + + REQUIRE(expirep != NULL); + REQUIRE(message != NULL); + + if (message->opt == NULL) + return; + + result = dns_rdataset_first(message->opt); + if (result == ISC_R_SUCCESS) { + dns_rdataset_current(message->opt, &rdata); + isc_buffer_init(&optbuf, rdata.data, rdata.length); + isc_buffer_add(&optbuf, rdata.length); + while (isc_buffer_remaininglength(&optbuf) >= 4) { + optcode = isc_buffer_getuint16(&optbuf); + optlen = isc_buffer_getuint16(&optbuf); + /* + * A EDNS EXPIRE response has a length of 4. + */ + if (optcode != DNS_OPT_EXPIRE || optlen != 4) { + isc_buffer_forward(&optbuf, optlen); + continue; + } + expire = isc_buffer_getuint32(&optbuf); + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "got EDNS EXPIRE of %u", expire); + /* + * Trim *expirep? + */ + if (expire < *expirep) + *expirep = expire; + break; + } + } +} + +/* + * Set the file modification time zone->expire seconds before expiretime. + */ +static void +setmodtime(dns_zone_t *zone, isc_time_t *expiretime) { + isc_result_t result; + isc_time_t when; + isc_interval_t i; + + isc_interval_set(&i, zone->expire, 0); + result = isc_time_subtract(expiretime, &i, &when); + if (result != ISC_R_SUCCESS) + return; + + result = ISC_R_FAILURE; + if (zone->journal != NULL) + result = isc_file_settime(zone->journal, &when); + if (result == ISC_R_SUCCESS && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP)) + result = isc_file_settime(zone->masterfile, &when); + else if (result != ISC_R_SUCCESS) + result = isc_file_settime(zone->masterfile, &when); + + /* + * Someone removed the file from underneath us! + */ + if (result == ISC_R_FILENOTFOUND) { + zone_needdump(zone, DNS_DUMP_DELAY); + } else if (result != ISC_R_SUCCESS) + dns_zone_log(zone, ISC_LOG_ERROR, "refresh: could not set " + "file modification time of '%s': %s", + zone->masterfile, dns_result_totext(result)); +} + +/* + * An SOA query has finished (successfully or not). + */ +static void +refresh_callback(isc_task_t *task, isc_event_t *event) { + const char me[] = "refresh_callback"; + dns_requestevent_t *revent = (dns_requestevent_t *)event; + dns_zone_t *zone; + dns_message_t *msg = NULL; + uint32_t soacnt, cnamecnt, soacount, nscount; + isc_time_t now; + char master[ISC_SOCKADDR_FORMATSIZE]; + char source[ISC_SOCKADDR_FORMATSIZE]; + dns_rdataset_t *rdataset = NULL; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdata_soa_t soa; + isc_result_t result; + uint32_t serial, oldserial = 0; + unsigned int j; + bool do_queue_xfrin = false; + + zone = revent->ev_arg; + INSIST(DNS_ZONE_VALID(zone)); + + UNUSED(task); + + ENTER; + + TIME_NOW(&now); + + LOCK_ZONE(zone); + + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) { + isc_event_free(&event); + dns_request_destroy(&zone->request); + goto detach; + } + + /* + * if timeout log and next master; + */ + + isc_sockaddr_format(&zone->masteraddr, master, sizeof(master)); + isc_sockaddr_format(&zone->sourceaddr, source, sizeof(source)); + + if (revent->result != ISC_R_SUCCESS) { + if (revent->result == ISC_R_TIMEDOUT && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS)) { + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS); + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "refresh: timeout retrying without EDNS " + "master %s (source %s)", master, source); + goto same_master; + } + if (revent->result == ISC_R_TIMEDOUT && + !dns_request_usedtcp(revent->request)) { + dns_zone_log(zone, ISC_LOG_INFO, + "refresh: retry limit for " + "master %s exceeded (source %s)", + master, source); + /* Try with slave with TCP. */ + if ((zone->type == dns_zone_slave || + zone->type == dns_zone_redirect) && + DNS_ZONE_OPTION(zone, DNS_ZONEOPT_TRYTCPREFRESH)) { + if (!dns_zonemgr_unreachable(zone->zmgr, + &zone->masteraddr, + &zone->sourceaddr, + &now)) + { + DNS_ZONE_SETFLAG(zone, + DNS_ZONEFLG_SOABEFOREAXFR); + goto tcp_transfer; + } + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "refresh: skipped tcp fallback " + "as master %s (source %s) is " + "unreachable (cached)", + master, source); + } + } else + dns_zone_log(zone, ISC_LOG_INFO, + "refresh: failure trying master " + "%s (source %s): %s", master, source, + dns_result_totext(revent->result)); + goto next_master; + } + + result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTPARSE, &msg); + if (result != ISC_R_SUCCESS) + goto next_master; + result = dns_request_getresponse(revent->request, msg, 0); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_INFO, + "refresh: failure trying master " + "%s (source %s): %s", master, source, + dns_result_totext(result)); + goto next_master; + } + + /* + * Unexpected rcode. + */ + if (msg->rcode != dns_rcode_noerror) { + char rcode[128]; + isc_buffer_t rb; + + isc_buffer_init(&rb, rcode, sizeof(rcode)); + (void)dns_rcode_totext(msg->rcode, &rb); + + if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS) && + (msg->rcode == dns_rcode_servfail || + msg->rcode == dns_rcode_notimp || + msg->rcode == dns_rcode_formerr)) { + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "refresh: rcode (%.*s) retrying without " + "EDNS master %s (source %s)", + (int)rb.used, rcode, master, source); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS); + goto same_master; + } + if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS) && + msg->rcode == dns_rcode_badvers) { + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "refresh: rcode (%.*s) retrying without " + "EDNS EXPIRE OPTION master %s (source %s)", + (int)rb.used, rcode, master, source); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS); + goto same_master; + } + dns_zone_log(zone, ISC_LOG_INFO, + "refresh: unexpected rcode (%.*s) from " + "master %s (source %s)", (int)rb.used, rcode, + master, source); + /* + * Perhaps AXFR/IXFR is allowed even if SOA queries aren't. + */ + if (msg->rcode == dns_rcode_refused && + (zone->type == dns_zone_slave || + zone->type == dns_zone_redirect)) + goto tcp_transfer; + goto next_master; + } + + /* + * If truncated punt to zone transfer which will query again. + */ + if ((msg->flags & DNS_MESSAGEFLAG_TC) != 0) { + if (zone->type == dns_zone_slave || + zone->type == dns_zone_redirect) { + dns_zone_log(zone, ISC_LOG_INFO, + "refresh: truncated UDP answer, " + "initiating TCP zone xfer " + "for master %s (source %s)", + master, source); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_SOABEFOREAXFR); + goto tcp_transfer; + } else { + INSIST(zone->type == dns_zone_stub); + if (dns_request_usedtcp(revent->request)) { + dns_zone_log(zone, ISC_LOG_INFO, + "refresh: truncated TCP response " + "from master %s (source %s)", + master, source); + goto next_master; + } + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEVC); + goto same_master; + } + } + + /* + * if non-auth log and next master; + */ + if ((msg->flags & DNS_MESSAGEFLAG_AA) == 0) { + dns_zone_log(zone, ISC_LOG_INFO, + "refresh: non-authoritative answer from " + "master %s (source %s)", master, source); + goto next_master; + } + + cnamecnt = message_count(msg, DNS_SECTION_ANSWER, dns_rdatatype_cname); + soacnt = message_count(msg, DNS_SECTION_ANSWER, dns_rdatatype_soa); + nscount = message_count(msg, DNS_SECTION_AUTHORITY, dns_rdatatype_ns); + soacount = message_count(msg, DNS_SECTION_AUTHORITY, + dns_rdatatype_soa); + + /* + * There should not be a CNAME record at top of zone. + */ + if (cnamecnt != 0) { + dns_zone_log(zone, ISC_LOG_INFO, + "refresh: CNAME at top of zone " + "in master %s (source %s)", master, source); + goto next_master; + } + + /* + * if referral log and next master; + */ + if (soacnt == 0 && soacount == 0 && nscount != 0) { + dns_zone_log(zone, ISC_LOG_INFO, + "refresh: referral response " + "from master %s (source %s)", master, source); + goto next_master; + } + + /* + * if nodata log and next master; + */ + if (soacnt == 0 && (nscount == 0 || soacount != 0)) { + dns_zone_log(zone, ISC_LOG_INFO, + "refresh: NODATA response " + "from master %s (source %s)", master, source); + goto next_master; + } + + /* + * Only one soa at top of zone. + */ + if (soacnt != 1) { + dns_zone_log(zone, ISC_LOG_INFO, + "refresh: answer SOA count (%d) != 1 " + "from master %s (source %s)", + soacnt, master, source); + goto next_master; + } + + /* + * Extract serial + */ + rdataset = NULL; + result = dns_message_findname(msg, DNS_SECTION_ANSWER, &zone->origin, + dns_rdatatype_soa, dns_rdatatype_none, + NULL, &rdataset); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_INFO, + "refresh: unable to get SOA record " + "from master %s (source %s)", master, source); + goto next_master; + } + + result = dns_rdataset_first(rdataset); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_INFO, + "refresh: dns_rdataset_first() failed"); + goto next_master; + } + + dns_rdataset_current(rdataset, &rdata); + result = dns_rdata_tostruct(&rdata, &soa, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + serial = soa.serial; + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) { + unsigned int dbsoacount; + result = zone_get_from_db(zone, zone->db, NULL, &dbsoacount, + &oldserial, NULL, NULL, NULL, NULL, + NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + RUNTIME_CHECK(dbsoacount > 0U); + zone_debuglog(zone, me, 1, "serial: new %u, old %u", + serial, oldserial); + } else + zone_debuglog(zone, me, 1, "serial: new %u, old not loaded", + serial); + + if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) || + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FORCEXFER) || + isc_serial_gt(serial, oldserial)) { + if (dns_zonemgr_unreachable(zone->zmgr, &zone->masteraddr, + &zone->sourceaddr, &now)) + { + dns_zone_log(zone, ISC_LOG_INFO, + "refresh: skipping %s as master %s " + "(source %s) is unreachable (cached)", + (zone->type == dns_zone_slave || + zone->type == dns_zone_redirect) ? + "zone transfer" : "NS query", + master, source); + goto next_master; + } + tcp_transfer: + isc_event_free(&event); + dns_request_destroy(&zone->request); + if (zone->type == dns_zone_slave || + zone->type == dns_zone_redirect) { + do_queue_xfrin = true; + } else { + INSIST(zone->type == dns_zone_stub); + ns_query(zone, rdataset, NULL); + } + if (msg != NULL) + dns_message_destroy(&msg); + } else if (isc_serial_eq(soa.serial, oldserial)) { + isc_time_t expiretime; + uint32_t expire; + + /* + * Compute the new expire time based on this response. + */ + expire = zone->expire; + get_edns_expire(zone, msg, &expire); + DNS_ZONE_TIME_ADD(&now, expire, &expiretime); + + /* + * Has the expire time improved? + */ + if (isc_time_compare(&expiretime, &zone->expiretime) > 0) { + zone->expiretime = expiretime; + if (zone->masterfile != NULL) + setmodtime(zone, &expiretime); + } + + DNS_ZONE_JITTER_ADD(&now, zone->refresh, &zone->refreshtime); + zone->mastersok[zone->curmaster] = true; + goto next_master; + } else { + if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_MULTIMASTER)) + dns_zone_log(zone, ISC_LOG_INFO, "serial number (%u) " + "received from master %s < ours (%u)", + soa.serial, master, oldserial); + else + zone_debuglog(zone, me, 1, "ahead"); + zone->mastersok[zone->curmaster] = true; + goto next_master; + } + if (msg != NULL) + dns_message_destroy(&msg); + goto detach; + + next_master: + if (msg != NULL) + dns_message_destroy(&msg); + isc_event_free(&event); + dns_request_destroy(&zone->request); + /* + * Skip to next failed / untried master. + */ + do { + zone->curmaster++; + } while (zone->curmaster < zone->masterscnt && + zone->mastersok[zone->curmaster]); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NOEDNS); + if (zone->curmaster >= zone->masterscnt) { + bool done = true; + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_USEALTXFRSRC) && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) { + /* + * Did we get a good answer from all the masters? + */ + for (j = 0; j < zone->masterscnt; j++) + if (zone->mastersok[j] == false) { + done = false; + break; + } + } else + done = true; + if (!done) { + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC); + zone->curmaster = 0; + /* + * Find the next failed master. + */ + while (zone->curmaster < zone->masterscnt && + zone->mastersok[zone->curmaster]) + zone->curmaster++; + goto requeue; + } + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH); + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDREFRESH)) { + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDREFRESH); + zone->refreshtime = now; + } + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC); + zone_settimer(zone, &now); + goto detach; + } + + requeue: + queue_soa_query(zone); + goto detach; + + same_master: + if (msg != NULL) + dns_message_destroy(&msg); + isc_event_free(&event); + dns_request_destroy(&zone->request); + queue_soa_query(zone); + + detach: + UNLOCK_ZONE(zone); + if (do_queue_xfrin) + queue_xfrin(zone); + dns_zone_idetach(&zone); + return; +} + +static void +queue_soa_query(dns_zone_t *zone) { + const char me[] = "queue_soa_query"; + isc_event_t *e; + dns_zone_t *dummy = NULL; + isc_result_t result; + + ENTER; + /* + * Locked by caller + */ + REQUIRE(LOCKED_ZONE(zone)); + + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) { + cancel_refresh(zone); + return; + } + + e = isc_event_allocate(zone->mctx, NULL, DNS_EVENT_ZONE, + soa_query, zone, sizeof(isc_event_t)); + if (e == NULL) { + cancel_refresh(zone); + return; + } + + /* + * Attach so that we won't clean up + * until the event is delivered. + */ + zone_iattach(zone, &dummy); + + e->ev_arg = zone; + e->ev_sender = NULL; + result = isc_ratelimiter_enqueue(zone->zmgr->refreshrl, zone->task, &e); + if (result != ISC_R_SUCCESS) { + zone_idetach(&dummy); + isc_event_free(&e); + cancel_refresh(zone); + } +} + +static inline isc_result_t +create_query(dns_zone_t *zone, dns_rdatatype_t rdtype, + dns_message_t **messagep) +{ + dns_message_t *message = NULL; + dns_name_t *qname = NULL; + dns_rdataset_t *qrdataset = NULL; + isc_result_t result; + + result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTRENDER, + &message); + if (result != ISC_R_SUCCESS) + goto cleanup; + + message->opcode = dns_opcode_query; + message->rdclass = zone->rdclass; + + result = dns_message_gettempname(message, &qname); + if (result != ISC_R_SUCCESS) + goto cleanup; + + result = dns_message_gettemprdataset(message, &qrdataset); + if (result != ISC_R_SUCCESS) + goto cleanup; + + /* + * Make question. + */ + dns_name_init(qname, NULL); + dns_name_clone(&zone->origin, qname); + dns_rdataset_makequestion(qrdataset, zone->rdclass, rdtype); + ISC_LIST_APPEND(qname->list, qrdataset, link); + dns_message_addname(message, qname, DNS_SECTION_QUESTION); + + *messagep = message; + return (ISC_R_SUCCESS); + + cleanup: + if (qname != NULL) + dns_message_puttempname(message, &qname); + if (qrdataset != NULL) + dns_message_puttemprdataset(message, &qrdataset); + if (message != NULL) + dns_message_destroy(&message); + return (result); +} + +static isc_result_t +add_opt(dns_message_t *message, uint16_t udpsize, bool reqnsid, + bool reqexpire) +{ + isc_result_t result; + dns_rdataset_t *rdataset = NULL; + dns_ednsopt_t ednsopts[DNS_EDNSOPTIONS]; + int count = 0; + + /* Set EDNS options if applicable */ + if (reqnsid) { + INSIST(count < DNS_EDNSOPTIONS); + ednsopts[count].code = DNS_OPT_NSID; + ednsopts[count].length = 0; + ednsopts[count].value = NULL; + count++; + } + if (reqexpire) { + INSIST(count < DNS_EDNSOPTIONS); + ednsopts[count].code = DNS_OPT_EXPIRE; + ednsopts[count].length = 0; + ednsopts[count].value = NULL; + count++; + } + result = dns_message_buildopt(message, &rdataset, 0, udpsize, 0, + ednsopts, count); + if (result != ISC_R_SUCCESS) + return (result); + + return (dns_message_setopt(message, rdataset)); +} + +static void +soa_query(isc_task_t *task, isc_event_t *event) { + const char me[] = "soa_query"; + isc_result_t result = ISC_R_FAILURE; + dns_message_t *message = NULL; + dns_zone_t *zone = event->ev_arg; + dns_zone_t *dummy = NULL; + isc_netaddr_t masterip; + dns_tsigkey_t *key = NULL; + uint32_t options; + bool cancel = true; + int timeout; + bool have_xfrsource, have_xfrdscp, reqnsid, reqexpire; + uint16_t udpsize = SEND_BUFFER_SIZE; + isc_dscp_t dscp = -1; + + REQUIRE(DNS_ZONE_VALID(zone)); + + UNUSED(task); + + ENTER; + + LOCK_ZONE(zone); + if (((event->ev_attributes & ISC_EVENTATTR_CANCELED) != 0) || + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING) || + zone->view->requestmgr == NULL) { + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) + cancel = false; + goto cleanup; + } + + again: + result = create_query(zone, dns_rdatatype_soa, &message); + if (result != ISC_R_SUCCESS) + goto cleanup; + + INSIST(zone->masterscnt > 0); + INSIST(zone->curmaster < zone->masterscnt); + + zone->masteraddr = zone->masters[zone->curmaster]; + + isc_netaddr_fromsockaddr(&masterip, &zone->masteraddr); + /* + * First, look for a tsig key in the master statement, then + * try for a server key. + */ + if ((zone->masterkeynames != NULL) && + (zone->masterkeynames[zone->curmaster] != NULL)) { + dns_view_t *view = dns_zone_getview(zone); + dns_name_t *keyname = zone->masterkeynames[zone->curmaster]; + result = dns_view_gettsig(view, keyname, &key); + if (result != ISC_R_SUCCESS) { + char namebuf[DNS_NAME_FORMATSIZE]; + dns_name_format(keyname, namebuf, sizeof(namebuf)); + dns_zone_log(zone, ISC_LOG_ERROR, + "unable to find key: %s", namebuf); + goto skip_master; + } + } + if (key == NULL) { + result = dns_view_getpeertsig(zone->view, &masterip, &key); + if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) { + char addrbuf[ISC_NETADDR_FORMATSIZE]; + isc_netaddr_format(&masterip, addrbuf, sizeof(addrbuf)); + dns_zone_log(zone, ISC_LOG_ERROR, + "unable to find TSIG key for %s", addrbuf); + goto skip_master; + } + } + + options = DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEVC) ? + DNS_REQUESTOPT_TCP : 0; + have_xfrsource = have_xfrdscp = false; + reqnsid = zone->view->requestnsid; + reqexpire = zone->requestexpire; + if (zone->view->peers != NULL) { + dns_peer_t *peer = NULL; + bool edns, usetcp; + result = dns_peerlist_peerbyaddr(zone->view->peers, + &masterip, &peer); + if (result == ISC_R_SUCCESS) { + result = dns_peer_getsupportedns(peer, &edns); + if (result == ISC_R_SUCCESS && !edns) + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS); + result = dns_peer_gettransfersource(peer, + &zone->sourceaddr); + if (result == ISC_R_SUCCESS) + have_xfrsource = true; + (void)dns_peer_gettransferdscp(peer, &dscp); + if (dscp != -1) + have_xfrdscp = true; + if (zone->view->resolver != NULL) + udpsize = + dns_resolver_getudpsize(zone->view->resolver); + (void)dns_peer_getudpsize(peer, &udpsize); + (void)dns_peer_getrequestnsid(peer, &reqnsid); + (void)dns_peer_getrequestexpire(peer, &reqexpire); + result = dns_peer_getforcetcp(peer, &usetcp); + if (result == ISC_R_SUCCESS && usetcp) + options |= DNS_REQUESTOPT_TCP; + } + } + + switch (isc_sockaddr_pf(&zone->masteraddr)) { + case PF_INET: + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) { + if (isc_sockaddr_equal(&zone->altxfrsource4, + &zone->xfrsource4)) + goto skip_master; + zone->sourceaddr = zone->altxfrsource4; + if (!have_xfrdscp) + dscp = zone->altxfrsource4dscp; + } else if (!have_xfrsource) { + zone->sourceaddr = zone->xfrsource4; + if (!have_xfrdscp) + dscp = zone->xfrsource4dscp; + } + break; + case PF_INET6: + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) { + if (isc_sockaddr_equal(&zone->altxfrsource6, + &zone->xfrsource6)) + goto skip_master; + zone->sourceaddr = zone->altxfrsource6; + if (!have_xfrdscp) + dscp = zone->altxfrsource6dscp; + } else if (!have_xfrsource) { + zone->sourceaddr = zone->xfrsource6; + if (!have_xfrdscp) + dscp = zone->xfrsource6dscp; + } + break; + default: + result = ISC_R_NOTIMPLEMENTED; + goto cleanup; + } + + if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS)) { + result = add_opt(message, udpsize, reqnsid, reqexpire); + if (result != ISC_R_SUCCESS) + zone_debuglog(zone, me, 1, + "unable to add opt record: %s", + dns_result_totext(result)); + } + + zone_iattach(zone, &dummy); + timeout = 15; + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH)) + timeout = 30; + result = dns_request_createvia4(zone->view->requestmgr, message, + &zone->sourceaddr, &zone->masteraddr, + dscp, options, key, timeout * 3, + timeout, 0, zone->task, + refresh_callback, zone, &zone->request); + if (result != ISC_R_SUCCESS) { + zone_idetach(&dummy); + zone_debuglog(zone, me, 1, + "dns_request_createvia4() failed: %s", + dns_result_totext(result)); + goto skip_master; + } else { + if (isc_sockaddr_pf(&zone->masteraddr) == PF_INET) + inc_stats(zone, dns_zonestatscounter_soaoutv4); + else + inc_stats(zone, dns_zonestatscounter_soaoutv6); + } + cancel = false; + + cleanup: + if (key != NULL) + dns_tsigkey_detach(&key); + if (result != ISC_R_SUCCESS) + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH); + if (message != NULL) + dns_message_destroy(&message); + if (cancel) + cancel_refresh(zone); + isc_event_free(&event); + UNLOCK_ZONE(zone); + dns_zone_idetach(&zone); + return; + + skip_master: + if (key != NULL) + dns_tsigkey_detach(&key); + dns_message_destroy(&message); + /* + * Skip to next failed / untried master. + */ + do { + zone->curmaster++; + } while (zone->curmaster < zone->masterscnt && + zone->mastersok[zone->curmaster]); + if (zone->curmaster < zone->masterscnt) + goto again; + zone->curmaster = 0; + goto cleanup; +} + +static void +ns_query(dns_zone_t *zone, dns_rdataset_t *soardataset, dns_stub_t *stub) { + const char me[] = "ns_query"; + isc_result_t result; + dns_message_t *message = NULL; + isc_netaddr_t masterip; + dns_tsigkey_t *key = NULL; + dns_dbnode_t *node = NULL; + int timeout; + bool have_xfrsource = false, have_xfrdscp = false; + bool reqnsid; + uint16_t udpsize = SEND_BUFFER_SIZE; + isc_dscp_t dscp = -1; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(LOCKED_ZONE(zone)); + REQUIRE((soardataset != NULL && stub == NULL) || + (soardataset == NULL && stub != NULL)); + REQUIRE(stub == NULL || DNS_STUB_VALID(stub)); + + ENTER; + + if (stub == NULL) { + stub = isc_mem_get(zone->mctx, sizeof(*stub)); + if (stub == NULL) + goto cleanup; + stub->magic = STUB_MAGIC; + stub->mctx = zone->mctx; + stub->zone = NULL; + stub->db = NULL; + stub->version = NULL; + + /* + * Attach so that the zone won't disappear from under us. + */ + zone_iattach(zone, &stub->zone); + + /* + * If a db exists we will update it, otherwise we create a + * new one and attach it to the zone once we have the NS + * RRset and glue. + */ + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) { + dns_db_attach(zone->db, &stub->db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + } else { + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + + INSIST(zone->db_argc >= 1); + result = dns_db_create(zone->mctx, zone->db_argv[0], + &zone->origin, dns_dbtype_stub, + zone->rdclass, + zone->db_argc - 1, + zone->db_argv + 1, + &stub->db); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "refreshing stub: " + "could not create " + "database: %s", + dns_result_totext(result)); + goto cleanup; + } + dns_db_settask(stub->db, zone->task); + } + + result = dns_db_newversion(stub->db, &stub->version); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_INFO, "refreshing stub: " + "dns_db_newversion() failed: %s", + dns_result_totext(result)); + goto cleanup; + } + + /* + * Update SOA record. + */ + result = dns_db_findnode(stub->db, &zone->origin, true, + &node); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_INFO, "refreshing stub: " + "dns_db_findnode() failed: %s", + dns_result_totext(result)); + goto cleanup; + } + + result = dns_db_addrdataset(stub->db, node, stub->version, 0, + soardataset, 0, NULL); + dns_db_detachnode(stub->db, &node); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_INFO, + "refreshing stub: " + "dns_db_addrdataset() failed: %s", + dns_result_totext(result)); + goto cleanup; + } + } + + /* + * XXX Optimisation: Create message when zone is setup and reuse. + */ + result = create_query(zone, dns_rdatatype_ns, &message); + INSIST(result == ISC_R_SUCCESS); + + INSIST(zone->masterscnt > 0); + INSIST(zone->curmaster < zone->masterscnt); + zone->masteraddr = zone->masters[zone->curmaster]; + + isc_netaddr_fromsockaddr(&masterip, &zone->masteraddr); + /* + * First, look for a tsig key in the master statement, then + * try for a server key. + */ + if ((zone->masterkeynames != NULL) && + (zone->masterkeynames[zone->curmaster] != NULL)) { + dns_view_t *view = dns_zone_getview(zone); + dns_name_t *keyname = zone->masterkeynames[zone->curmaster]; + result = dns_view_gettsig(view, keyname, &key); + if (result != ISC_R_SUCCESS) { + char namebuf[DNS_NAME_FORMATSIZE]; + dns_name_format(keyname, namebuf, sizeof(namebuf)); + dns_zone_log(zone, ISC_LOG_ERROR, + "unable to find key: %s", namebuf); + } + } + if (key == NULL) + (void)dns_view_getpeertsig(zone->view, &masterip, &key); + + reqnsid = zone->view->requestnsid; + if (zone->view->peers != NULL) { + dns_peer_t *peer = NULL; + bool edns; + result = dns_peerlist_peerbyaddr(zone->view->peers, + &masterip, &peer); + if (result == ISC_R_SUCCESS) { + result = dns_peer_getsupportedns(peer, &edns); + if (result == ISC_R_SUCCESS && !edns) + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS); + result = dns_peer_gettransfersource(peer, + &zone->sourceaddr); + if (result == ISC_R_SUCCESS) + have_xfrsource = true; + result = dns_peer_gettransferdscp(peer, &dscp); + if (result == ISC_R_SUCCESS && dscp != -1) + have_xfrdscp = true; + if (zone->view->resolver != NULL) + udpsize = + dns_resolver_getudpsize(zone->view->resolver); + (void)dns_peer_getudpsize(peer, &udpsize); + (void)dns_peer_getrequestnsid(peer, &reqnsid); + } + + } + if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS)) { + result = add_opt(message, udpsize, reqnsid, false); + if (result != ISC_R_SUCCESS) + zone_debuglog(zone, me, 1, + "unable to add opt record: %s", + dns_result_totext(result)); + } + + /* + * Always use TCP so that we shouldn't truncate in additional section. + */ + switch (isc_sockaddr_pf(&zone->masteraddr)) { + case PF_INET: + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) { + zone->sourceaddr = zone->altxfrsource4; + if (!have_xfrdscp) + dscp = zone->altxfrsource4dscp; + } else if (!have_xfrsource) { + zone->sourceaddr = zone->xfrsource4; + if (!have_xfrdscp) + dscp = zone->xfrsource4dscp; + } + break; + case PF_INET6: + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) { + zone->sourceaddr = zone->altxfrsource6; + if (!have_xfrdscp) + dscp = zone->altxfrsource6dscp; + } else if (!have_xfrsource) { + zone->sourceaddr = zone->xfrsource6; + if (!have_xfrdscp) + dscp = zone->xfrsource6dscp; + } + break; + default: + result = ISC_R_NOTIMPLEMENTED; + POST(result); + goto cleanup; + } + timeout = 15; + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH)) + timeout = 30; + result = dns_request_createvia4(zone->view->requestmgr, message, + &zone->sourceaddr, &zone->masteraddr, + dscp, DNS_REQUESTOPT_TCP, key, + timeout * 3, timeout, 0, zone->task, + stub_callback, stub, &zone->request); + if (result != ISC_R_SUCCESS) { + zone_debuglog(zone, me, 1, + "dns_request_createvia() failed: %s", + dns_result_totext(result)); + goto cleanup; + } + dns_message_destroy(&message); + goto unlock; + + cleanup: + cancel_refresh(zone); + if (stub != NULL) { + stub->magic = 0; + if (stub->version != NULL) + dns_db_closeversion(stub->db, &stub->version, + false); + if (stub->db != NULL) + dns_db_detach(&stub->db); + if (stub->zone != NULL) + zone_idetach(&stub->zone); + isc_mem_put(stub->mctx, stub, sizeof(*stub)); + } + if (message != NULL) + dns_message_destroy(&message); + unlock: + if (key != NULL) + dns_tsigkey_detach(&key); + return; +} + +/* + * Handle the control event. Note that although this event causes the zone + * to shut down, it is not a shutdown event in the sense of the task library. + */ +static void +zone_shutdown(isc_task_t *task, isc_event_t *event) { + dns_zone_t *zone = (dns_zone_t *) event->ev_arg; + bool free_needed, linked = false; + dns_zone_t *raw = NULL, *secure = NULL; + + UNUSED(task); + REQUIRE(DNS_ZONE_VALID(zone)); + INSIST(event->ev_type == DNS_EVENT_ZONECONTROL); + INSIST(isc_refcount_current(&zone->erefs) == 0); + + zone_debuglog(zone, "zone_shutdown", 3, "shutting down"); + + /* + * Stop things being restarted after we cancel them below. + */ + LOCK_ZONE(zone); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_EXITING); + UNLOCK_ZONE(zone); + + /* + * If we were waiting for xfrin quota, step out of + * the queue. + * If there's no zone manager, we can't be waiting for the + * xfrin quota + */ + if (zone->zmgr != NULL) { + RWLOCK(&zone->zmgr->rwlock, isc_rwlocktype_write); + if (zone->statelist == &zone->zmgr->waiting_for_xfrin) { + ISC_LIST_UNLINK(zone->zmgr->waiting_for_xfrin, zone, + statelink); + linked = true; + zone->statelist = NULL; + } + if (zone->statelist == &zone->zmgr->xfrin_in_progress) { + ISC_LIST_UNLINK(zone->zmgr->xfrin_in_progress, zone, + statelink); + zone->statelist = NULL; + zmgr_resume_xfrs(zone->zmgr, false); + } + RWUNLOCK(&zone->zmgr->rwlock, isc_rwlocktype_write); + } + + /* + * In task context, no locking required. See zone_xfrdone(). + */ + if (zone->xfr != NULL) + dns_xfrin_shutdown(zone->xfr); + + /* Safe to release the zone now */ + if (zone->zmgr != NULL) + dns_zonemgr_releasezone(zone->zmgr, zone); + + LOCK_ZONE(zone); + INSIST(zone != zone->raw); + if (linked) { + INSIST(zone->irefs > 0); + zone->irefs--; + } + if (zone->request != NULL) { + dns_request_cancel(zone->request); + } + + if (zone->readio != NULL) + zonemgr_cancelio(zone->readio); + + if (zone->lctx != NULL) + dns_loadctx_cancel(zone->lctx); + + if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FLUSH) || + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) { + if (zone->writeio != NULL) + zonemgr_cancelio(zone->writeio); + + if (zone->dctx != NULL) + dns_dumpctx_cancel(zone->dctx); + } + + notify_cancel(zone); + + forward_cancel(zone); + + if (zone->timer != NULL) { + isc_timer_detach(&zone->timer); + INSIST(zone->irefs > 0); + zone->irefs--; + } + + /* + * We have now canceled everything set the flag to allow exit_check() + * to succeed. We must not unlock between setting this flag and + * calling exit_check(). + */ + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_SHUTDOWN); + free_needed = exit_check(zone); + if (inline_secure(zone)) { + raw = zone->raw; + zone->raw = NULL; + } + if (inline_raw(zone)) { + secure = zone->secure; + zone->secure = NULL; + } + UNLOCK_ZONE(zone); + if (raw != NULL) + dns_zone_detach(&raw); + if (secure != NULL) + dns_zone_idetach(&secure); + if (free_needed) + zone_free(zone); +} + +static void +zone_timer(isc_task_t *task, isc_event_t *event) { + const char me[] = "zone_timer"; + dns_zone_t *zone = (dns_zone_t *)event->ev_arg; + + UNUSED(task); + REQUIRE(DNS_ZONE_VALID(zone)); + + ENTER; + + zone_maintenance(zone); + + isc_event_free(&event); +} + +static void +zone_settimer(dns_zone_t *zone, isc_time_t *now) { + const char me[] = "zone_settimer"; + isc_time_t next; + isc_result_t result; + + REQUIRE(DNS_ZONE_VALID(zone)); + ENTER; + + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) + return; + + isc_time_settoepoch(&next); + + switch (zone->type) { + case dns_zone_redirect: + if (zone->masters != NULL) + goto treat_as_slave; + /* FALLTHROUGH */ + + case dns_zone_master: + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDNOTIFY) || + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDSTARTUPNOTIFY)) + next = zone->notifytime; + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) { + INSIST(!isc_time_isepoch(&zone->dumptime)); + if (isc_time_isepoch(&next) || + isc_time_compare(&zone->dumptime, &next) < 0) + next = zone->dumptime; + } + if (zone->type == dns_zone_redirect) + break; + if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESHING) && + !isc_time_isepoch(&zone->refreshkeytime)) { + if (isc_time_isepoch(&next) || + isc_time_compare(&zone->refreshkeytime, &next) < 0) + next = zone->refreshkeytime; + } + if (!isc_time_isepoch(&zone->resigntime)) { + if (isc_time_isepoch(&next) || + isc_time_compare(&zone->resigntime, &next) < 0) + next = zone->resigntime; + } + if (!isc_time_isepoch(&zone->keywarntime)) { + if (isc_time_isepoch(&next) || + isc_time_compare(&zone->keywarntime, &next) < 0) + next = zone->keywarntime; + } + if (!isc_time_isepoch(&zone->signingtime)) { + if (isc_time_isepoch(&next) || + isc_time_compare(&zone->signingtime, &next) < 0) + next = zone->signingtime; + } + if (!isc_time_isepoch(&zone->nsec3chaintime)) { + if (isc_time_isepoch(&next) || + isc_time_compare(&zone->nsec3chaintime, &next) < 0) + next = zone->nsec3chaintime; + } + break; + + case dns_zone_slave: + treat_as_slave: + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDNOTIFY) || + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDSTARTUPNOTIFY)) + next = zone->notifytime; + /* FALLTHROUGH */ + + case dns_zone_stub: + if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESH) && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOMASTERS) && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOREFRESH) && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADING) && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADPENDING) && + !isc_time_isepoch(&zone->refreshtime) && + (isc_time_isepoch(&next) || + isc_time_compare(&zone->refreshtime, &next) < 0)) + next = zone->refreshtime; + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) && + !isc_time_isepoch(&zone->expiretime)) { + if (isc_time_isepoch(&next) || + isc_time_compare(&zone->expiretime, &next) < 0) + next = zone->expiretime; + } + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) { + INSIST(!isc_time_isepoch(&zone->dumptime)); + if (isc_time_isepoch(&next) || + isc_time_compare(&zone->dumptime, &next) < 0) + next = zone->dumptime; + } + break; + + case dns_zone_key: + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) { + INSIST(!isc_time_isepoch(&zone->dumptime)); + if (isc_time_isepoch(&next) || + isc_time_compare(&zone->dumptime, &next) < 0) + next = zone->dumptime; + } + if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESHING)) { + if (isc_time_isepoch(&next) || + (!isc_time_isepoch(&zone->refreshkeytime) && + isc_time_compare(&zone->refreshkeytime, &next) < 0)) + next = zone->refreshkeytime; + } + break; + + default: + break; + } + + if (isc_time_isepoch(&next)) { + zone_debuglog(zone, me, 10, "settimer inactive"); + result = isc_timer_reset(zone->timer, isc_timertype_inactive, + NULL, NULL, true); + if (result != ISC_R_SUCCESS) + dns_zone_log(zone, ISC_LOG_ERROR, + "could not deactivate zone timer: %s", + isc_result_totext(result)); + } else { + if (isc_time_compare(&next, now) <= 0) + next = *now; + result = isc_timer_reset(zone->timer, isc_timertype_once, + &next, NULL, true); + if (result != ISC_R_SUCCESS) + dns_zone_log(zone, ISC_LOG_ERROR, + "could not reset zone timer: %s", + isc_result_totext(result)); + } +} + +static void +cancel_refresh(dns_zone_t *zone) { + const char me[] = "cancel_refresh"; + isc_time_t now; + + /* + * 'zone' locked by caller. + */ + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(LOCKED_ZONE(zone)); + + ENTER; + + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH); + TIME_NOW(&now); + zone_settimer(zone, &now); +} + +static isc_result_t +notify_createmessage(dns_zone_t *zone, unsigned int flags, + dns_message_t **messagep) +{ + dns_db_t *zonedb = NULL; + dns_dbnode_t *node = NULL; + dns_dbversion_t *version = NULL; + dns_message_t *message = NULL; + dns_rdataset_t rdataset; + dns_rdata_t rdata = DNS_RDATA_INIT; + + dns_name_t *tempname = NULL; + dns_rdata_t *temprdata = NULL; + dns_rdatalist_t *temprdatalist = NULL; + dns_rdataset_t *temprdataset = NULL; + + isc_result_t result; + isc_region_t r; + isc_buffer_t *b = NULL; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(messagep != NULL && *messagep == NULL); + + result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTRENDER, + &message); + if (result != ISC_R_SUCCESS) + return (result); + + message->opcode = dns_opcode_notify; + message->flags |= DNS_MESSAGEFLAG_AA; + message->rdclass = zone->rdclass; + + result = dns_message_gettempname(message, &tempname); + if (result != ISC_R_SUCCESS) + goto cleanup; + + result = dns_message_gettemprdataset(message, &temprdataset); + if (result != ISC_R_SUCCESS) + goto cleanup; + + /* + * Make question. + */ + dns_name_init(tempname, NULL); + dns_name_clone(&zone->origin, tempname); + dns_rdataset_makequestion(temprdataset, zone->rdclass, + dns_rdatatype_soa); + ISC_LIST_APPEND(tempname->list, temprdataset, link); + dns_message_addname(message, tempname, DNS_SECTION_QUESTION); + tempname = NULL; + temprdataset = NULL; + + if ((flags & DNS_NOTIFY_NOSOA) != 0) + goto done; + + result = dns_message_gettempname(message, &tempname); + if (result != ISC_R_SUCCESS) + goto soa_cleanup; + result = dns_message_gettemprdata(message, &temprdata); + if (result != ISC_R_SUCCESS) + goto soa_cleanup; + result = dns_message_gettemprdataset(message, &temprdataset); + if (result != ISC_R_SUCCESS) + goto soa_cleanup; + result = dns_message_gettemprdatalist(message, &temprdatalist); + if (result != ISC_R_SUCCESS) + goto soa_cleanup; + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + INSIST(zone->db != NULL); /* XXXJT: is this assumption correct? */ + dns_db_attach(zone->db, &zonedb); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + + dns_name_init(tempname, NULL); + dns_name_clone(&zone->origin, tempname); + dns_db_currentversion(zonedb, &version); + result = dns_db_findnode(zonedb, tempname, false, &node); + if (result != ISC_R_SUCCESS) + goto soa_cleanup; + + dns_rdataset_init(&rdataset); + result = dns_db_findrdataset(zonedb, node, version, + dns_rdatatype_soa, + dns_rdatatype_none, 0, &rdataset, + NULL); + if (result != ISC_R_SUCCESS) + goto soa_cleanup; + result = dns_rdataset_first(&rdataset); + if (result != ISC_R_SUCCESS) + goto soa_cleanup; + dns_rdataset_current(&rdataset, &rdata); + dns_rdata_toregion(&rdata, &r); + result = isc_buffer_allocate(zone->mctx, &b, r.length); + if (result != ISC_R_SUCCESS) + goto soa_cleanup; + isc_buffer_putmem(b, r.base, r.length); + isc_buffer_usedregion(b, &r); + dns_rdata_init(temprdata); + dns_rdata_fromregion(temprdata, rdata.rdclass, rdata.type, &r); + dns_message_takebuffer(message, &b); + result = dns_rdataset_next(&rdataset); + dns_rdataset_disassociate(&rdataset); + if (result != ISC_R_NOMORE) + goto soa_cleanup; + temprdatalist->rdclass = rdata.rdclass; + temprdatalist->type = rdata.type; + temprdatalist->ttl = rdataset.ttl; + ISC_LIST_APPEND(temprdatalist->rdata, temprdata, link); + + result = dns_rdatalist_tordataset(temprdatalist, temprdataset); + if (result != ISC_R_SUCCESS) + goto soa_cleanup; + + ISC_LIST_APPEND(tempname->list, temprdataset, link); + dns_message_addname(message, tempname, DNS_SECTION_ANSWER); + temprdatalist = NULL; + temprdataset = NULL; + temprdata = NULL; + tempname = NULL; + + soa_cleanup: + if (node != NULL) + dns_db_detachnode(zonedb, &node); + if (version != NULL) + dns_db_closeversion(zonedb, &version, false); + if (zonedb != NULL) + dns_db_detach(&zonedb); + if (tempname != NULL) + dns_message_puttempname(message, &tempname); + if (temprdata != NULL) + dns_message_puttemprdata(message, &temprdata); + if (temprdataset != NULL) + dns_message_puttemprdataset(message, &temprdataset); + if (temprdatalist != NULL) + dns_message_puttemprdatalist(message, &temprdatalist); + + done: + *messagep = message; + return (ISC_R_SUCCESS); + + cleanup: + if (tempname != NULL) + dns_message_puttempname(message, &tempname); + if (temprdataset != NULL) + dns_message_puttemprdataset(message, &temprdataset); + dns_message_destroy(&message); + return (result); +} + +isc_result_t +dns_zone_notifyreceive(dns_zone_t *zone, isc_sockaddr_t *from, + dns_message_t *msg) +{ + return (dns_zone_notifyreceive2(zone, from, NULL, msg)); +} + +isc_result_t +dns_zone_notifyreceive2(dns_zone_t *zone, isc_sockaddr_t *from, + isc_sockaddr_t *to, dns_message_t *msg) +{ + unsigned int i; + dns_rdata_soa_t soa; + dns_rdataset_t *rdataset = NULL; + dns_rdata_t rdata = DNS_RDATA_INIT; + isc_result_t result; + char fromtext[ISC_SOCKADDR_FORMATSIZE]; + int match = 0; + isc_netaddr_t netaddr; + uint32_t serial = 0; + bool have_serial = false; + dns_tsigkey_t *tsigkey; + dns_name_t *tsig; + + REQUIRE(DNS_ZONE_VALID(zone)); + + /* + * If type != T_SOA return DNS_R_NOTIMP. We don't yet support + * ROLLOVER. + * + * SOA: RFC1996 + * Check that 'from' is a valid notify source, (zone->masters). + * Return DNS_R_REFUSED if not. + * + * If the notify message contains a serial number check it + * against the zones serial and return if <= current serial + * + * If a refresh check is progress, if so just record the + * fact we received a NOTIFY and from where and return. + * We will perform a new refresh check when the current one + * completes. Return ISC_R_SUCCESS. + * + * Otherwise initiate a refresh check using 'from' as the + * first address to check. Return ISC_R_SUCCESS. + */ + + isc_sockaddr_format(from, fromtext, sizeof(fromtext)); + + /* + * Notify messages are processed by the raw zone. + */ + LOCK_ZONE(zone); + INSIST(zone != zone->raw); + if (inline_secure(zone)) { + result = dns_zone_notifyreceive2(zone->raw, from, to, msg); + UNLOCK_ZONE(zone); + return (result); + } + /* + * We only handle NOTIFY (SOA) at the present. + */ + if (isc_sockaddr_pf(from) == PF_INET) + inc_stats(zone, dns_zonestatscounter_notifyinv4); + else + inc_stats(zone, dns_zonestatscounter_notifyinv6); + if (msg->counts[DNS_SECTION_QUESTION] == 0 || + dns_message_findname(msg, DNS_SECTION_QUESTION, &zone->origin, + dns_rdatatype_soa, dns_rdatatype_none, + NULL, NULL) != ISC_R_SUCCESS) { + UNLOCK_ZONE(zone); + if (msg->counts[DNS_SECTION_QUESTION] == 0) { + dns_zone_log(zone, ISC_LOG_NOTICE, + "NOTIFY with no " + "question section from: %s", fromtext); + return (DNS_R_FORMERR); + } + dns_zone_log(zone, ISC_LOG_NOTICE, + "NOTIFY zone does not match"); + return (DNS_R_NOTIMP); + } + + /* + * If we are a master zone just succeed. + */ + if (zone->type == dns_zone_master) { + UNLOCK_ZONE(zone); + return (ISC_R_SUCCESS); + } + + isc_netaddr_fromsockaddr(&netaddr, from); + for (i = 0; i < zone->masterscnt; i++) { + if (isc_sockaddr_eqaddr(from, &zone->masters[i])) + break; + if (zone->view->aclenv.match_mapped && + IN6_IS_ADDR_V4MAPPED(&from->type.sin6.sin6_addr) && + isc_sockaddr_pf(&zone->masters[i]) == AF_INET) { + isc_netaddr_t na1, na2; + isc_netaddr_fromv4mapped(&na1, &netaddr); + isc_netaddr_fromsockaddr(&na2, &zone->masters[i]); + if (isc_netaddr_equal(&na1, &na2)) + break; + } + } + + /* + * Accept notify requests from non masters if they are on + * 'zone->notify_acl'. + */ + tsigkey = dns_message_gettsigkey(msg); + tsig = dns_tsigkey_identity(tsigkey); + if (i >= zone->masterscnt && zone->notify_acl != NULL && + dns_acl_match(&netaddr, tsig, zone->notify_acl, + &zone->view->aclenv, + &match, NULL) == ISC_R_SUCCESS && + match > 0) + { + /* Accept notify. */ + } else if (i >= zone->masterscnt) { + UNLOCK_ZONE(zone); + dns_zone_log(zone, ISC_LOG_INFO, + "refused notify from non-master: %s", fromtext); + inc_stats(zone, dns_zonestatscounter_notifyrej); + return (DNS_R_REFUSED); + } + + /* + * If the zone is loaded and there are answers check the serial + * to see if we need to do a refresh. Do not worry about this + * check if we are a dialup zone as we use the notify request + * to trigger a refresh check. + */ + if (msg->counts[DNS_SECTION_ANSWER] > 0 && + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOREFRESH)) { + result = dns_message_findname(msg, DNS_SECTION_ANSWER, + &zone->origin, + dns_rdatatype_soa, + dns_rdatatype_none, NULL, + &rdataset); + if (result == ISC_R_SUCCESS) + result = dns_rdataset_first(rdataset); + if (result == ISC_R_SUCCESS) { + uint32_t oldserial; + unsigned int soacount; + + dns_rdataset_current(rdataset, &rdata); + result = dns_rdata_tostruct(&rdata, &soa, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + serial = soa.serial; + have_serial = true; + /* + * The following should safely be performed without DB + * lock and succeed in this context. + */ + result = zone_get_from_db(zone, zone->db, NULL, + &soacount, &oldserial, NULL, + NULL, NULL, NULL, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + RUNTIME_CHECK(soacount > 0U); + if (isc_serial_le(serial, oldserial)) { + dns_zone_log(zone, + ISC_LOG_INFO, + "notify from %s: " + "zone is up to date", + fromtext); + UNLOCK_ZONE(zone); + return (ISC_R_SUCCESS); + } + } + } + + /* + * If we got this far and there was a refresh in progress just + * let it complete. Record where we got the notify from so we + * can perform a refresh check when the current one completes + */ + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESH)) { + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDREFRESH); + zone->notifyfrom = *from; + UNLOCK_ZONE(zone); + if (have_serial) + dns_zone_log(zone, ISC_LOG_INFO, + "notify from %s: serial %u: refresh in " + "progress, refresh check queued", + fromtext, serial); + else + dns_zone_log(zone, ISC_LOG_INFO, + "notify from %s: refresh in progress, " + "refresh check queued", fromtext); + return (ISC_R_SUCCESS); + } + if (have_serial) + dns_zone_log(zone, ISC_LOG_INFO, "notify from %s: serial %u", + fromtext, serial); + else + dns_zone_log(zone, ISC_LOG_INFO, "notify from %s: no serial", + fromtext); + zone->notifyfrom = *from; + UNLOCK_ZONE(zone); + + if (to != NULL) { + dns_zonemgr_unreachabledel(zone->zmgr, from, to); + } + dns_zone_refresh(zone); + return (ISC_R_SUCCESS); +} + +void +dns_zone_setnotifyacl(dns_zone_t *zone, dns_acl_t *acl) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->notify_acl != NULL) + dns_acl_detach(&zone->notify_acl); + dns_acl_attach(acl, &zone->notify_acl); + UNLOCK_ZONE(zone); +} + +void +dns_zone_setqueryacl(dns_zone_t *zone, dns_acl_t *acl) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->query_acl != NULL) + dns_acl_detach(&zone->query_acl); + dns_acl_attach(acl, &zone->query_acl); + UNLOCK_ZONE(zone); +} + +void +dns_zone_setqueryonacl(dns_zone_t *zone, dns_acl_t *acl) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->queryon_acl != NULL) + dns_acl_detach(&zone->queryon_acl); + dns_acl_attach(acl, &zone->queryon_acl); + UNLOCK_ZONE(zone); +} + +void +dns_zone_setupdateacl(dns_zone_t *zone, dns_acl_t *acl) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->update_acl != NULL) + dns_acl_detach(&zone->update_acl); + dns_acl_attach(acl, &zone->update_acl); + UNLOCK_ZONE(zone); +} + +void +dns_zone_setforwardacl(dns_zone_t *zone, dns_acl_t *acl) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->forward_acl != NULL) + dns_acl_detach(&zone->forward_acl); + dns_acl_attach(acl, &zone->forward_acl); + UNLOCK_ZONE(zone); +} + +void +dns_zone_setxfracl(dns_zone_t *zone, dns_acl_t *acl) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->xfr_acl != NULL) + dns_acl_detach(&zone->xfr_acl); + dns_acl_attach(acl, &zone->xfr_acl); + UNLOCK_ZONE(zone); +} + +dns_acl_t * +dns_zone_getnotifyacl(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->notify_acl); +} + +dns_acl_t * +dns_zone_getqueryacl(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->query_acl); +} + +dns_acl_t * +dns_zone_getqueryonacl(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->queryon_acl); +} + +dns_acl_t * +dns_zone_getupdateacl(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->update_acl); +} + +dns_acl_t * +dns_zone_getforwardacl(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->forward_acl); +} + +dns_acl_t * +dns_zone_getxfracl(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->xfr_acl); +} + +void +dns_zone_clearupdateacl(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->update_acl != NULL) + dns_acl_detach(&zone->update_acl); + UNLOCK_ZONE(zone); +} + +void +dns_zone_clearforwardacl(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->forward_acl != NULL) + dns_acl_detach(&zone->forward_acl); + UNLOCK_ZONE(zone); +} + +void +dns_zone_clearnotifyacl(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->notify_acl != NULL) + dns_acl_detach(&zone->notify_acl); + UNLOCK_ZONE(zone); +} + +void +dns_zone_clearqueryacl(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->query_acl != NULL) + dns_acl_detach(&zone->query_acl); + UNLOCK_ZONE(zone); +} + +void +dns_zone_clearqueryonacl(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->queryon_acl != NULL) + dns_acl_detach(&zone->queryon_acl); + UNLOCK_ZONE(zone); +} + +void +dns_zone_clearxfracl(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->xfr_acl != NULL) + dns_acl_detach(&zone->xfr_acl); + UNLOCK_ZONE(zone); +} + +bool +dns_zone_getupdatedisabled(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->update_disabled); + +} + +void +dns_zone_setupdatedisabled(dns_zone_t *zone, bool state) { + REQUIRE(DNS_ZONE_VALID(zone)); + zone->update_disabled = state; +} + +bool +dns_zone_getzeronosoattl(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->zero_no_soa_ttl); + +} + +void +dns_zone_setzeronosoattl(dns_zone_t *zone, bool state) { + REQUIRE(DNS_ZONE_VALID(zone)); + zone->zero_no_soa_ttl = state; +} + +void +dns_zone_setchecknames(dns_zone_t *zone, dns_severity_t severity) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + zone->check_names = severity; +} + +dns_severity_t +dns_zone_getchecknames(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->check_names); +} + +void +dns_zone_setjournalsize(dns_zone_t *zone, int32_t size) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + zone->journalsize = size; +} + +int32_t +dns_zone_getjournalsize(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->journalsize); +} + +static void +zone_namerd_tostr(dns_zone_t *zone, char *buf, size_t length) { + isc_result_t result = ISC_R_FAILURE; + isc_buffer_t buffer; + + REQUIRE(buf != NULL); + REQUIRE(length > 1U); + + /* + * Leave space for terminating '\0'. + */ + isc_buffer_init(&buffer, buf, (unsigned int)length - 1); + if (zone->type != dns_zone_redirect && zone->type != dns_zone_key) { + if (dns_name_dynamic(&zone->origin)) + result = dns_name_totext(&zone->origin, true, &buffer); + if (result != ISC_R_SUCCESS && + isc_buffer_availablelength(&buffer) >= (sizeof("<UNKNOWN>") - 1)) + isc_buffer_putstr(&buffer, "<UNKNOWN>"); + + if (isc_buffer_availablelength(&buffer) > 0) + isc_buffer_putstr(&buffer, "/"); + (void)dns_rdataclass_totext(zone->rdclass, &buffer); + } + + if (zone->view != NULL && strcmp(zone->view->name, "_bind") != 0 && + strcmp(zone->view->name, "_default") != 0 && + strlen(zone->view->name) < isc_buffer_availablelength(&buffer)) { + isc_buffer_putstr(&buffer, "/"); + isc_buffer_putstr(&buffer, zone->view->name); + } + if (inline_secure(zone) && 9U < isc_buffer_availablelength(&buffer)) + isc_buffer_putstr(&buffer, " (signed)"); + if (inline_raw(zone) && 11U < isc_buffer_availablelength(&buffer)) + isc_buffer_putstr(&buffer, " (unsigned)"); + + buf[isc_buffer_usedlength(&buffer)] = '\0'; +} + +static void +zone_name_tostr(dns_zone_t *zone, char *buf, size_t length) { + isc_result_t result = ISC_R_FAILURE; + isc_buffer_t buffer; + + REQUIRE(buf != NULL); + REQUIRE(length > 1U); + + /* + * Leave space for terminating '\0'. + */ + isc_buffer_init(&buffer, buf, (unsigned int)length - 1); + if (dns_name_dynamic(&zone->origin)) + result = dns_name_totext(&zone->origin, true, &buffer); + if (result != ISC_R_SUCCESS && + isc_buffer_availablelength(&buffer) >= (sizeof("<UNKNOWN>") - 1)) + isc_buffer_putstr(&buffer, "<UNKNOWN>"); + + buf[isc_buffer_usedlength(&buffer)] = '\0'; +} + +static void +zone_rdclass_tostr(dns_zone_t *zone, char *buf, size_t length) { + isc_buffer_t buffer; + + REQUIRE(buf != NULL); + REQUIRE(length > 1U); + + /* + * Leave space for terminating '\0'. + */ + isc_buffer_init(&buffer, buf, (unsigned int)length - 1); + (void)dns_rdataclass_totext(zone->rdclass, &buffer); + + buf[isc_buffer_usedlength(&buffer)] = '\0'; +} + +static void +zone_viewname_tostr(dns_zone_t *zone, char *buf, size_t length) { + isc_buffer_t buffer; + + REQUIRE(buf != NULL); + REQUIRE(length > 1U); + + + /* + * Leave space for terminating '\0'. + */ + isc_buffer_init(&buffer, buf, (unsigned int)length - 1); + + if (zone->view == NULL) { + isc_buffer_putstr(&buffer, "_none"); + } else if (strlen(zone->view->name) + < isc_buffer_availablelength(&buffer)) { + isc_buffer_putstr(&buffer, zone->view->name); + } else { + isc_buffer_putstr(&buffer, "_toolong"); + } + + buf[isc_buffer_usedlength(&buffer)] = '\0'; +} + +void +dns_zone_name(dns_zone_t *zone, char *buf, size_t length) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(buf != NULL); + zone_namerd_tostr(zone, buf, length); +} + +void +dns_zone_nameonly(dns_zone_t *zone, char *buf, size_t length) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(buf != NULL); + zone_name_tostr(zone, buf, length); +} + +void +dns_zone_logv(dns_zone_t *zone, isc_logcategory_t *category, int level, + const char *prefix, const char *fmt, va_list ap) +{ + char message[4096]; + const char *zstr; + + if (!isc_log_wouldlog(dns_lctx, level)) { + return; + } + + vsnprintf(message, sizeof(message), fmt, ap); + + switch (zone->type) { + case dns_zone_key: + zstr = "managed-keys-zone"; + break; + case dns_zone_redirect: + zstr = "redirect-zone"; + break; + default: + zstr = "zone "; + } + + isc_log_write(dns_lctx, category, DNS_LOGMODULE_ZONE, level, + "%s%s%s%s: %s", + (prefix != NULL ? prefix : ""), + (prefix != NULL ? ": " : ""), + zstr, zone->strnamerd, message); +} + +static void +notify_log(dns_zone_t *zone, int level, const char *fmt, ...) { + va_list ap; + + va_start(ap, fmt); + dns_zone_logv(zone, DNS_LOGCATEGORY_NOTIFY, level, NULL, fmt, ap); + va_end(ap); +} + +void +dns_zone_logc(dns_zone_t *zone, isc_logcategory_t *category, + int level, const char *fmt, ...) { + va_list ap; + + va_start(ap, fmt); + dns_zone_logv(zone, category, level, NULL, fmt, ap); + va_end(ap); +} + +void +dns_zone_log(dns_zone_t *zone, int level, const char *fmt, ...) { + va_list ap; + + va_start(ap, fmt); + dns_zone_logv(zone, DNS_LOGCATEGORY_GENERAL, level, NULL, fmt, ap); + va_end(ap); +} + +static void +zone_debuglog(dns_zone_t *zone, const char *me, int debuglevel, + const char *fmt, ...) +{ + int level = ISC_LOG_DEBUG(debuglevel); + va_list ap; + + va_start(ap, fmt); + dns_zone_logv(zone, DNS_LOGCATEGORY_GENERAL, level, me, fmt, ap); + va_end(ap); +} + +static int +message_count(dns_message_t *msg, dns_section_t section, dns_rdatatype_t type) +{ + isc_result_t result; + dns_name_t *name; + dns_rdataset_t *curr; + int count = 0; + + result = dns_message_firstname(msg, section); + while (result == ISC_R_SUCCESS) { + name = NULL; + dns_message_currentname(msg, section, &name); + + for (curr = ISC_LIST_TAIL(name->list); curr != NULL; + curr = ISC_LIST_PREV(curr, link)) { + if (curr->type == type) + count++; + } + result = dns_message_nextname(msg, section); + } + + return (count); +} + +void +dns_zone_setmaxxfrin(dns_zone_t *zone, uint32_t maxxfrin) { + REQUIRE(DNS_ZONE_VALID(zone)); + + zone->maxxfrin = maxxfrin; +} + +uint32_t +dns_zone_getmaxxfrin(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->maxxfrin); +} + +void +dns_zone_setmaxxfrout(dns_zone_t *zone, uint32_t maxxfrout) { + REQUIRE(DNS_ZONE_VALID(zone)); + zone->maxxfrout = maxxfrout; +} + +uint32_t +dns_zone_getmaxxfrout(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->maxxfrout); +} + +dns_zonetype_t +dns_zone_gettype(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->type); +} + +dns_name_t * +dns_zone_getorigin(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (&zone->origin); +} + +void +dns_zone_settask(dns_zone_t *zone, isc_task_t *task) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->task != NULL) + isc_task_detach(&zone->task); + isc_task_attach(task, &zone->task); + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) + dns_db_settask(zone->db, zone->task); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + UNLOCK_ZONE(zone); +} + +void +dns_zone_gettask(dns_zone_t *zone, isc_task_t **target) { + REQUIRE(DNS_ZONE_VALID(zone)); + isc_task_attach(zone->task, target); +} + +void +dns_zone_setidlein(dns_zone_t *zone, uint32_t idlein) { + REQUIRE(DNS_ZONE_VALID(zone)); + + if (idlein == 0) + idlein = DNS_DEFAULT_IDLEIN; + zone->idlein = idlein; +} + +uint32_t +dns_zone_getidlein(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->idlein); +} + +void +dns_zone_setidleout(dns_zone_t *zone, uint32_t idleout) { + REQUIRE(DNS_ZONE_VALID(zone)); + + zone->idleout = idleout; +} + +uint32_t +dns_zone_getidleout(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->idleout); +} + +static void +notify_done(isc_task_t *task, isc_event_t *event) { + dns_requestevent_t *revent = (dns_requestevent_t *)event; + dns_notify_t *notify; + isc_result_t result; + dns_message_t *message = NULL; + isc_buffer_t buf; + char rcode[128]; + char addrbuf[ISC_SOCKADDR_FORMATSIZE]; + + UNUSED(task); + + notify = event->ev_arg; + REQUIRE(DNS_NOTIFY_VALID(notify)); + INSIST(task == notify->zone->task); + + isc_buffer_init(&buf, rcode, sizeof(rcode)); + isc_sockaddr_format(¬ify->dst, addrbuf, sizeof(addrbuf)); + + result = revent->result; + if (result == ISC_R_SUCCESS) + result = dns_message_create(notify->zone->mctx, + DNS_MESSAGE_INTENTPARSE, &message); + if (result == ISC_R_SUCCESS) + result = dns_request_getresponse(revent->request, message, + DNS_MESSAGEPARSE_PRESERVEORDER); + if (result == ISC_R_SUCCESS) + result = dns_rcode_totext(message->rcode, &buf); + if (result == ISC_R_SUCCESS) + notify_log(notify->zone, ISC_LOG_DEBUG(3), + "notify response from %s: %.*s", + addrbuf, (int)buf.used, rcode); + else + notify_log(notify->zone, ISC_LOG_DEBUG(2), + "notify to %s failed: %s", addrbuf, + dns_result_totext(result)); + + /* + * Old bind's return formerr if they see a soa record. Retry w/o + * the soa if we see a formerr and had sent a SOA. + */ + isc_event_free(&event); + if (message != NULL && message->rcode == dns_rcode_formerr && + (notify->flags & DNS_NOTIFY_NOSOA) == 0) { + bool startup; + + notify->flags |= DNS_NOTIFY_NOSOA; + dns_request_destroy(¬ify->request); + startup = (notify->flags & DNS_NOTIFY_STARTUP); + result = notify_send_queue(notify, startup); + if (result != ISC_R_SUCCESS) + notify_destroy(notify, false); + } else { + if (result == ISC_R_TIMEDOUT) + notify_log(notify->zone, ISC_LOG_DEBUG(1), + "notify to %s: retries exceeded", addrbuf); + notify_destroy(notify, false); + } + if (message != NULL) + dns_message_destroy(&message); +} + +struct secure_event { + isc_event_t e; + dns_db_t *db; + uint32_t serial; +}; + +static void +update_log_cb(void *arg, dns_zone_t *zone, int level, const char *message) { + UNUSED(arg); + dns_zone_log(zone, level, "%s", message); +} + +static isc_result_t +sync_secure_journal(dns_zone_t *zone, dns_zone_t *raw, dns_journal_t *journal, + uint32_t start, uint32_t end, + dns_difftuple_t **soatuplep, dns_diff_t *diff) +{ + isc_result_t result; + dns_difftuple_t *tuple = NULL; + dns_diffop_t op = DNS_DIFFOP_ADD; + int n_soa = 0; + + REQUIRE(soatuplep != NULL); + + if (start == end) + return (DNS_R_UNCHANGED); + + CHECK(dns_journal_iter_init(journal, start, end)); + for (result = dns_journal_first_rr(journal); + result == ISC_R_SUCCESS; + result = dns_journal_next_rr(journal)) + { + dns_name_t *name = NULL; + uint32_t ttl; + dns_rdata_t *rdata = NULL; + dns_journal_current_rr(journal, &name, &ttl, &rdata); + + if (rdata->type == dns_rdatatype_soa) { + n_soa++; + if (n_soa == 2) { + /* + * Save the latest raw SOA record. + */ + if (*soatuplep != NULL) + dns_difftuple_free(soatuplep); + CHECK(dns_difftuple_create(diff->mctx, + DNS_DIFFOP_ADD, + name, ttl, rdata, + soatuplep)); + } + if (n_soa == 3) + n_soa = 1; + continue; + } + + /* Sanity. */ + if (n_soa == 0) { + dns_zone_log(raw, ISC_LOG_ERROR, + "corrupt journal file: '%s'\n", + raw->journal); + return (ISC_R_FAILURE); + } + + if (zone->privatetype != 0 && + rdata->type == zone->privatetype) + continue; + + if (rdata->type == dns_rdatatype_nsec || + rdata->type == dns_rdatatype_rrsig || + rdata->type == dns_rdatatype_nsec3 || + rdata->type == dns_rdatatype_dnskey || + rdata->type == dns_rdatatype_nsec3param) + continue; + + op = (n_soa == 1) ? DNS_DIFFOP_DEL : DNS_DIFFOP_ADD; + + CHECK(dns_difftuple_create(diff->mctx, op, name, ttl, rdata, + &tuple)); + dns_diff_appendminimal(diff, &tuple); + } + if (result == ISC_R_NOMORE) + result = ISC_R_SUCCESS; + + failure: + return(result); +} + +static isc_result_t +sync_secure_db(dns_zone_t *seczone, dns_zone_t *raw, dns_db_t *secdb, + dns_dbversion_t *secver, dns_difftuple_t **soatuple, + dns_diff_t *diff) +{ + isc_result_t result; + dns_db_t *rawdb = NULL; + dns_dbversion_t *rawver = NULL; + dns_difftuple_t *tuple = NULL, *next; + dns_difftuple_t *oldtuple = NULL, *newtuple = NULL; + dns_rdata_soa_t oldsoa, newsoa; + + REQUIRE(DNS_ZONE_VALID(seczone)); + REQUIRE(soatuple != NULL && *soatuple == NULL); + + if (!seczone->sourceserialset) + return (DNS_R_UNCHANGED); + + dns_db_attach(raw->db, &rawdb); + dns_db_currentversion(rawdb, &rawver); + result = dns_db_diffx(diff, rawdb, rawver, secdb, secver, NULL); + dns_db_closeversion(rawdb, &rawver, false); + dns_db_detach(&rawdb); + + if (result != ISC_R_SUCCESS) + return (result); + + for (tuple = ISC_LIST_HEAD(diff->tuples); + tuple != NULL; + tuple = next) + { + next = ISC_LIST_NEXT(tuple, link); + if (tuple->rdata.type == dns_rdatatype_nsec || + tuple->rdata.type == dns_rdatatype_rrsig || + tuple->rdata.type == dns_rdatatype_dnskey || + tuple->rdata.type == dns_rdatatype_nsec3 || + tuple->rdata.type == dns_rdatatype_nsec3param) + { + ISC_LIST_UNLINK(diff->tuples, tuple, link); + dns_difftuple_free(&tuple); + continue; + } + if (tuple->rdata.type == dns_rdatatype_soa) { + if (tuple->op == DNS_DIFFOP_DEL) { + INSIST(oldtuple == NULL); + oldtuple = tuple; + } + if (tuple->op == DNS_DIFFOP_ADD) { + INSIST(newtuple == NULL); + newtuple = tuple; + } + } + } + + if (oldtuple != NULL && newtuple != NULL) { + + result = dns_rdata_tostruct(&oldtuple->rdata, &oldsoa, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + result = dns_rdata_tostruct(&newtuple->rdata, &newsoa, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + /* + * If the SOA records are the same except for the serial + * remove them from the diff. + */ + if (oldsoa.refresh == newsoa.refresh && + oldsoa.retry == newsoa.retry && + oldsoa.minimum == newsoa.minimum && + oldsoa.expire == newsoa.expire && + dns_name_equal(&oldsoa.origin, &newsoa.origin) && + dns_name_equal(&oldsoa.contact, &newsoa.contact)) { + ISC_LIST_UNLINK(diff->tuples, oldtuple, link); + dns_difftuple_free(&oldtuple); + ISC_LIST_UNLINK(diff->tuples, newtuple, link); + dns_difftuple_free(&newtuple); + } + } + + if (ISC_LIST_EMPTY(diff->tuples)) + return (DNS_R_UNCHANGED); + + /* + * If there are still SOA records in the diff they can now be removed + * saving the new SOA record. + */ + if (oldtuple != NULL) { + ISC_LIST_UNLINK(diff->tuples, oldtuple, link); + dns_difftuple_free(&oldtuple); + } + + if (newtuple != NULL) { + ISC_LIST_UNLINK(diff->tuples, newtuple, link); + *soatuple = newtuple; + } + + return (ISC_R_SUCCESS); +} + +static void +receive_secure_serial(isc_task_t *task, isc_event_t *event) { + static char me[] = "receive_secure_serial"; + isc_result_t result = ISC_R_SUCCESS; + dns_journal_t *rjournal = NULL; + dns_journal_t *sjournal = NULL; + uint32_t start, end; + dns_zone_t *zone; + dns_difftuple_t *tuple = NULL, *soatuple = NULL; + dns_update_log_t log = { update_log_cb, NULL }; + uint32_t newserial = 0, desired = 0; + isc_time_t timenow; + + UNUSED(task); + + zone = event->ev_arg; + end = ((struct secure_event *)event)->serial; + + ENTER; + + LOCK_ZONE(zone); + + /* + * If we are already processing a receive secure serial event + * for the zone, just queue the new one and exit. + */ + if (zone->rss_event != NULL && zone->rss_event != event) { + ISC_LIST_APPEND(zone->rss_events, event, ev_link); + UNLOCK_ZONE(zone); + return; + } + + nextevent: + if (zone->rss_event != NULL) { + INSIST(zone->rss_event == event); + UNLOCK_ZONE(zone); + } else { + zone->rss_event = event; + dns_diff_init(zone->mctx, &zone->rss_diff); + + /* + * zone->db may be NULL, if the load from disk failed. + */ + result = ISC_R_SUCCESS; + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) + dns_db_attach(zone->db, &zone->rss_db); + else + result = ISC_R_FAILURE; + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + + if (result == ISC_R_SUCCESS && zone->raw != NULL) + dns_zone_attach(zone->raw, &zone->rss_raw); + else + result = ISC_R_FAILURE; + + UNLOCK_ZONE(zone); + + CHECK(result); + + /* + * We first attempt to sync the raw zone to the secure zone + * by using the raw zone's journal, applying all the deltas + * from the latest source-serial of the secure zone up to + * the current serial number of the raw zone. + * + * If that fails, then we'll fall back to a direct comparison + * between raw and secure zones. + */ + CHECK(dns_journal_open(zone->rss_raw->mctx, + zone->rss_raw->journal, + DNS_JOURNAL_WRITE, &rjournal)); + + result = dns_journal_open(zone->mctx, zone->journal, + DNS_JOURNAL_READ, &sjournal); + if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) + goto failure; + + if (!dns_journal_get_sourceserial(rjournal, &start)) { + start = dns_journal_first_serial(rjournal); + dns_journal_set_sourceserial(rjournal, start); + } + if (sjournal != NULL) { + uint32_t serial; + /* + * We read the secure journal first, if that + * exists use its value provided it is greater + * that from the raw journal. + */ + if (dns_journal_get_sourceserial(sjournal, &serial)) { + if (isc_serial_gt(serial, start)) + start = serial; + } + dns_journal_destroy(&sjournal); + } + + dns_db_currentversion(zone->rss_db, &zone->rss_oldver); + CHECK(dns_db_newversion(zone->rss_db, &zone->rss_newver)); + + /* + * Try to apply diffs from the raw zone's journal to the secure + * zone. If that fails, we recover by syncing up the databases + * directly. + */ + result = sync_secure_journal(zone, zone->rss_raw, rjournal, + start, end, &soatuple, + &zone->rss_diff); + if (result == DNS_R_UNCHANGED) + goto failure; + else if (result != ISC_R_SUCCESS) + CHECK(sync_secure_db(zone, zone->rss_raw, zone->rss_db, + zone->rss_oldver, &soatuple, + &zone->rss_diff)); + + CHECK(dns_diff_apply(&zone->rss_diff, zone->rss_db, + zone->rss_newver)); + + if (soatuple != NULL) { + uint32_t oldserial; + + CHECK(dns_db_createsoatuple(zone->rss_db, + zone->rss_oldver, + zone->rss_diff.mctx, + DNS_DIFFOP_DEL, &tuple)); + oldserial = dns_soa_getserial(&tuple->rdata); + newserial = desired = + dns_soa_getserial(&soatuple->rdata); + if (!isc_serial_gt(newserial, oldserial)) { + newserial = oldserial + 1; + if (newserial == 0) + newserial++; + dns_soa_setserial(newserial, &soatuple->rdata); + } + CHECK(do_one_tuple(&tuple, zone->rss_db, + zone->rss_newver, &zone->rss_diff)); + CHECK(do_one_tuple(&soatuple, zone->rss_db, + zone->rss_newver, &zone->rss_diff)); + } else + CHECK(update_soa_serial(zone->rss_db, zone->rss_newver, + &zone->rss_diff, zone->mctx, + zone->updatemethod)); + + } + result = dns_update_signaturesinc(&log, zone, zone->rss_db, + zone->rss_oldver, zone->rss_newver, + &zone->rss_diff, + zone->sigvalidityinterval, + &zone->rss_state); + if (result == DNS_R_CONTINUE) { + if (rjournal != NULL) + dns_journal_destroy(&rjournal); + isc_task_send(task, &event); + fprintf(stderr, "looping on dns_update_signaturesinc\n"); + return; + } + /* + * If something went wrong while trying to update the secure zone and + * the latter was already signed before, do not apply raw zone deltas + * to it as that would break existing DNSSEC signatures. However, if + * the secure zone was not yet signed (e.g. because no signing keys + * were created for it), commence applying raw zone deltas to it so + * that contents of the raw zone and the secure zone are kept in sync. + */ + if (result != ISC_R_SUCCESS && dns_db_issecure(zone->rss_db)) { + goto failure; + } + + if (rjournal == NULL) + CHECK(dns_journal_open(zone->rss_raw->mctx, + zone->rss_raw->journal, + DNS_JOURNAL_WRITE, &rjournal)); + CHECK(zone_journal(zone, &zone->rss_diff, &end, + "receive_secure_serial")); + + dns_journal_set_sourceserial(rjournal, end); + dns_journal_commit(rjournal); + + LOCK_ZONE(zone); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY); + + zone->sourceserial = end; + zone->sourceserialset = true; + zone_needdump(zone, DNS_DUMP_DELAY); + + TIME_NOW(&timenow); + zone_settimer(zone, &timenow); + UNLOCK_ZONE(zone); + + dns_db_closeversion(zone->rss_db, &zone->rss_oldver, false); + dns_db_closeversion(zone->rss_db, &zone->rss_newver, true); + + if (newserial != 0) { + dns_zone_log(zone, ISC_LOG_INFO, "serial %u (unsigned %u)", + newserial, desired); + } + + failure: + isc_event_free(&zone->rss_event); + event = ISC_LIST_HEAD(zone->rss_events); + + if (zone->rss_raw != NULL) + dns_zone_detach(&zone->rss_raw); + if (result != ISC_R_SUCCESS) + dns_zone_log(zone, ISC_LOG_ERROR, "receive_secure_serial: %s", + dns_result_totext(result)); + if (tuple != NULL) + dns_difftuple_free(&tuple); + if (soatuple != NULL) + dns_difftuple_free(&soatuple); + if (zone->rss_db != NULL) { + if (zone->rss_oldver != NULL) + dns_db_closeversion(zone->rss_db, &zone->rss_oldver, + false); + if (zone->rss_newver != NULL) + dns_db_closeversion(zone->rss_db, &zone->rss_newver, + false); + dns_db_detach(&zone->rss_db); + } + INSIST(zone->rss_oldver == NULL); + INSIST(zone->rss_newver == NULL); + if (rjournal != NULL) + dns_journal_destroy(&rjournal); + dns_diff_clear(&zone->rss_diff); + + if (event != NULL) { + LOCK_ZONE(zone); + INSIST(zone->irefs > 1); + zone->irefs--; + ISC_LIST_UNLINK(zone->rss_events, event, ev_link); + goto nextevent; + } + dns_zone_idetach(&zone); +} + +static isc_result_t +zone_send_secureserial(dns_zone_t *zone, uint32_t serial) { + isc_event_t *e; + dns_zone_t *dummy = NULL; + + e = isc_event_allocate(zone->secure->mctx, zone, + DNS_EVENT_ZONESECURESERIAL, + receive_secure_serial, zone->secure, + sizeof(struct secure_event)); + if (e == NULL) + return (ISC_R_NOMEMORY); + ((struct secure_event *)e)->serial = serial; + INSIST(LOCKED_ZONE(zone->secure)); + zone_iattach(zone->secure, &dummy); + isc_task_send(zone->secure->task, &e); + + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_SENDSECURE); + return (ISC_R_SUCCESS); +} + +static isc_result_t +checkandaddsoa(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version, + dns_rdataset_t *rdataset, uint32_t oldserial) +{ + dns_rdata_soa_t soa; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdatalist_t temprdatalist; + dns_rdataset_t temprdataset; + isc_buffer_t b; + isc_result_t result; + unsigned char buf[DNS_SOA_BUFFERSIZE]; + dns_fixedname_t fixed; + dns_name_t *name; + + result = dns_rdataset_first(rdataset); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + dns_rdataset_current(rdataset, &rdata); + result = dns_rdata_tostruct(&rdata, &soa, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + if (isc_serial_gt(soa.serial, oldserial)) + return (dns_db_addrdataset(db, node, version, 0, rdataset, 0, + NULL)); + /* + * Always bump the serial. + */ + oldserial++; + if (oldserial == 0) + oldserial++; + soa.serial = oldserial; + + /* + * Construct a replacement rdataset. + */ + dns_rdata_reset(&rdata); + isc_buffer_init(&b, buf, sizeof(buf)); + result = dns_rdata_fromstruct(&rdata, rdataset->rdclass, + dns_rdatatype_soa, &soa, &b); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + dns_rdatalist_init(&temprdatalist); + temprdatalist.rdclass = rdata.rdclass; + temprdatalist.type = rdata.type; + temprdatalist.ttl = rdataset->ttl; + ISC_LIST_APPEND(temprdatalist.rdata, &rdata, link); + + dns_rdataset_init(&temprdataset); + result = dns_rdatalist_tordataset(&temprdatalist, &temprdataset); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + + name = dns_fixedname_initname(&fixed); + result = dns_db_nodefullname(db, node, name); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + dns_rdataset_getownercase(rdataset, name); + dns_rdataset_setownercase(&temprdataset, name); + return (dns_db_addrdataset(db, node, version, 0, &temprdataset, + 0, NULL)); +} + +/* + * This function should populate an nsec3paramlist_t with the + * nsecparam_t data from a zone. + */ +static isc_result_t +save_nsec3param(dns_zone_t *zone, nsec3paramlist_t *nsec3list) { + isc_result_t result; + dns_dbnode_t *node = NULL; + dns_rdataset_t rdataset, prdataset; + dns_dbversion_t *version = NULL; + nsec3param_t *nsec3param = NULL; + nsec3param_t *nsec3p = NULL; + nsec3param_t *next; + dns_db_t *db = NULL; + unsigned char buf[DNS_NSEC3PARAM_BUFFERSIZE]; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(nsec3list != NULL); + REQUIRE(ISC_LIST_EMPTY(*nsec3list)); + + dns_rdataset_init(&rdataset); + dns_rdataset_init(&prdataset); + + dns_db_attach(zone->db, &db); + CHECK(dns_db_getoriginnode(db, &node)); + + dns_db_currentversion(db, &version); + result = dns_db_findrdataset(db, node, version, + dns_rdatatype_nsec3param, + dns_rdatatype_none, 0, &rdataset, NULL); + + if (result != ISC_R_SUCCESS) + goto getprivate; + + /* + * walk nsec3param rdataset making a list of parameters (note that + * multiple simultaneous nsec3 chains are annoyingly legal -- this + * is why we use an nsec3list, even tho we will usually only have + * one) + */ + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) + { + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdata_t private = DNS_RDATA_INIT; + + dns_rdataset_current(&rdataset, &rdata); + isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_ZONE, ISC_LOG_DEBUG(3), + "looping through nsec3param data"); + nsec3param = isc_mem_get(zone->mctx, sizeof(nsec3param_t)); + if (nsec3param == NULL) + CHECK(ISC_R_NOMEMORY); + ISC_LINK_INIT(nsec3param, link); + + /* + * now transfer the data from the rdata to + * the nsec3param + */ + dns_nsec3param_toprivate(&rdata, &private, + zone->privatetype, nsec3param->data, + sizeof(nsec3param->data)); + nsec3param->length = private.length; + ISC_LIST_APPEND(*nsec3list, nsec3param, link); + } + + getprivate: + result = dns_db_findrdataset(db, node, version, zone->privatetype, + dns_rdatatype_none, 0, &prdataset, NULL); + if (result != ISC_R_SUCCESS) + goto done; + + /* + * walk private type records, converting them to nsec3 parameters + * using dns_nsec3param_fromprivate(), do the right thing based on + * CREATE and REMOVE flags + */ + for (result = dns_rdataset_first(&prdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&prdataset)) + { + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdata_t private = DNS_RDATA_INIT; + + dns_rdataset_current(&prdataset, &private); + isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_ZONE, ISC_LOG_DEBUG(3), + "looping through nsec3param private data"); + + /* + * Do we have a valid private record? + */ + if (!dns_nsec3param_fromprivate(&private, &rdata, + buf, sizeof(buf))) + continue; + + /* + * Remove any NSEC3PARAM records scheduled to be removed. + */ + if (NSEC3REMOVE(rdata.data[1])) { + /* + * Zero out the flags. + */ + rdata.data[1] = 0; + + for (nsec3p = ISC_LIST_HEAD(*nsec3list); + nsec3p != NULL; + nsec3p = next) + { + next = ISC_LIST_NEXT(nsec3p, link); + + if (nsec3p->length == rdata.length + 1 && + memcmp(rdata.data, nsec3p->data + 1, + nsec3p->length - 1) == 0) { + ISC_LIST_UNLINK(*nsec3list, + nsec3p, link); + isc_mem_put(zone->mctx, nsec3p, + sizeof(nsec3param_t)); + } + } + continue; + } + + nsec3param = isc_mem_get(zone->mctx, sizeof(nsec3param_t)); + if (nsec3param == NULL) + CHECK(ISC_R_NOMEMORY); + ISC_LINK_INIT(nsec3param, link); + + /* + * Copy the remaining private records so the nsec/nsec3 + * chain gets created. + */ + INSIST(private.length <= sizeof(nsec3param->data)); + memmove(nsec3param->data, private.data, private.length); + nsec3param->length = private.length; + ISC_LIST_APPEND(*nsec3list, nsec3param, link); + } + + done: + if (result == ISC_R_NOMORE || result == ISC_R_NOTFOUND) + result = ISC_R_SUCCESS; + + failure: + if (node != NULL) + dns_db_detachnode(db, &node); + if (version != NULL) + dns_db_closeversion(db, &version, false); + if (db != NULL) + dns_db_detach(&db); + if (dns_rdataset_isassociated(&rdataset)) + dns_rdataset_disassociate(&rdataset); + if (dns_rdataset_isassociated(&prdataset)) + dns_rdataset_disassociate(&prdataset); + return (result); +} + +/* + * Populate new zone db with private type records found by save_nsec3param(). + */ +static isc_result_t +restore_nsec3param(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *version, + nsec3paramlist_t *nsec3list) +{ + isc_result_t result; + dns_diff_t diff; + dns_rdata_t rdata; + nsec3param_t *nsec3p = NULL; + nsec3param_t *next; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(!ISC_LIST_EMPTY(*nsec3list)); + + dns_diff_init(zone->mctx, &diff); + + /* + * Loop through the list of private-type records, set the INITIAL + * and CREATE flags, and the add the record to the apex of the tree + * in db. + */ + for (nsec3p = ISC_LIST_HEAD(*nsec3list); + nsec3p != NULL; + nsec3p = next) + { + next = ISC_LIST_NEXT(nsec3p, link); + dns_rdata_init(&rdata); + nsec3p->data[2] = DNS_NSEC3FLAG_CREATE | DNS_NSEC3FLAG_INITIAL; + rdata.length = nsec3p->length; + rdata.data = nsec3p->data; + rdata.type = zone->privatetype; + rdata.rdclass = zone->rdclass; + result = update_one_rr(db, version, &diff, DNS_DIFFOP_ADD, + &zone->origin, 0, &rdata); + if (result != ISC_R_SUCCESS) { + break; + } + } + + dns_diff_clear(&diff); + return (result); +} + +static void +receive_secure_db(isc_task_t *task, isc_event_t *event) { + isc_result_t result; + dns_zone_t *zone; + dns_db_t *rawdb, *db = NULL; + dns_dbnode_t *rawnode = NULL, *node = NULL; + dns_fixedname_t fname; + dns_name_t *name; + dns_dbiterator_t *dbiterator = NULL; + dns_rdatasetiter_t *rdsit = NULL; + dns_rdataset_t rdataset; + dns_dbversion_t *version = NULL; + isc_time_t loadtime; + unsigned int oldserial = 0; + bool have_oldserial = false; + nsec3paramlist_t nsec3list; + isc_event_t *setnsec3param_event; + dns_zone_t *dummy; + + UNUSED(task); + + ISC_LIST_INIT(nsec3list); + + zone = event->ev_arg; + rawdb = ((struct secure_event *)event)->db; + isc_event_free(&event); + + name = dns_fixedname_initname(&fname); + dns_rdataset_init(&rdataset); + + LOCK_ZONE(zone); + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING) || !inline_secure(zone)) { + result = ISC_R_SHUTTINGDOWN; + goto failure; + } + + TIME_NOW(&loadtime); + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) { + result = dns_db_getsoaserial(zone->db, NULL, &oldserial); + if (result == ISC_R_SUCCESS) + have_oldserial = true; + + /* + * assemble nsec3parameters from the old zone, and set a flag + * if any are found + */ + result = save_nsec3param(zone, &nsec3list); + if (result != ISC_R_SUCCESS) { + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + goto failure; + } + } + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + + result = dns_db_create(zone->mctx, zone->db_argv[0], + &zone->origin, dns_dbtype_zone, zone->rdclass, + zone->db_argc - 1, zone->db_argv + 1, &db); + if (result != ISC_R_SUCCESS) + goto failure; + + result = dns_db_newversion(db, &version); + if (result != ISC_R_SUCCESS) + goto failure; + + result = dns_db_createiterator(rawdb, 0, &dbiterator); + if (result != ISC_R_SUCCESS) + goto failure; + + for (result = dns_dbiterator_first(dbiterator); + result == ISC_R_SUCCESS; + result = dns_dbiterator_next(dbiterator)) { + result = dns_dbiterator_current(dbiterator, &rawnode, name); + if (result != ISC_R_SUCCESS) + continue; + + result = dns_db_findnode(db, name, true, &node); + if (result != ISC_R_SUCCESS) + goto failure; + + result = dns_db_allrdatasets(rawdb, rawnode, NULL, 0, &rdsit); + if (result != ISC_R_SUCCESS) + goto failure; + + for (result = dns_rdatasetiter_first(rdsit); + result == ISC_R_SUCCESS; + result = dns_rdatasetiter_next(rdsit)) { + dns_rdatasetiter_current(rdsit, &rdataset); + if (rdataset.type == dns_rdatatype_nsec || + rdataset.type == dns_rdatatype_rrsig || + rdataset.type == dns_rdatatype_nsec3 || + rdataset.type == dns_rdatatype_dnskey || + rdataset.type == dns_rdatatype_nsec3param) { + dns_rdataset_disassociate(&rdataset); + continue; + } + if (rdataset.type == dns_rdatatype_soa && + have_oldserial) { + result = checkandaddsoa(db, node, version, + &rdataset, oldserial); + } else + result = dns_db_addrdataset(db, node, version, + 0, &rdataset, 0, + NULL); + if (result != ISC_R_SUCCESS) + goto failure; + + dns_rdataset_disassociate(&rdataset); + } + dns_rdatasetiter_destroy(&rdsit); + dns_db_detachnode(rawdb, &rawnode); + dns_db_detachnode(db, &node); + } + + /* + * Call restore_nsec3param() to create private-type records from + * the old nsec3 parameters and insert them into db + */ + if (!ISC_LIST_EMPTY(nsec3list)) { + result = restore_nsec3param(zone, db, version, &nsec3list); + if (result != ISC_R_SUCCESS) { + goto failure; + } + } + + dns_db_closeversion(db, &version, true); + + /* + * Lock hierarchy: zmgr, zone, raw. + */ + INSIST(zone != zone->raw); + LOCK_ZONE(zone->raw); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY); + result = zone_postload(zone, db, loadtime, ISC_R_SUCCESS); + zone_needdump(zone, 0); /* XXXMPA */ + UNLOCK_ZONE(zone->raw); + + /* + * Process any queued NSEC3PARAM change requests. + */ + while (!ISC_LIST_EMPTY(zone->setnsec3param_queue)) { + setnsec3param_event = ISC_LIST_HEAD(zone->setnsec3param_queue); + ISC_LIST_UNLINK(zone->setnsec3param_queue, setnsec3param_event, + ev_link); + dummy = NULL; + zone_iattach(zone, &dummy); + isc_task_send(zone->task, &setnsec3param_event); + } + + failure: + UNLOCK_ZONE(zone); + if (result != ISC_R_SUCCESS) + dns_zone_log(zone, ISC_LOG_ERROR, "receive_secure_db: %s", + dns_result_totext(result)); + + while (!ISC_LIST_EMPTY(nsec3list)) { + nsec3param_t *nsec3p; + nsec3p = ISC_LIST_HEAD(nsec3list); + ISC_LIST_UNLINK(nsec3list, nsec3p, link); + isc_mem_put(zone->mctx, nsec3p, sizeof(nsec3param_t)); + } + if (dns_rdataset_isassociated(&rdataset)) + dns_rdataset_disassociate(&rdataset); + if (db != NULL) { + if (node != NULL) + dns_db_detachnode(db, &node); + if (version != NULL) + dns_db_closeversion(db, &version, false); + dns_db_detach(&db); + } + if (rawnode != NULL) + dns_db_detachnode(rawdb, &rawnode); + dns_db_detach(&rawdb); + if (dbiterator != NULL) + dns_dbiterator_destroy(&dbiterator); + dns_zone_idetach(&zone); + + INSIST(version == NULL); +} + +static isc_result_t +zone_send_securedb(dns_zone_t *zone, dns_db_t *db) { + isc_event_t *e; + dns_db_t *dummy = NULL; + dns_zone_t *secure = NULL; + + e = isc_event_allocate(zone->secure->mctx, zone, + DNS_EVENT_ZONESECUREDB, + receive_secure_db, zone->secure, + sizeof(struct secure_event)); + if (e == NULL) + return (ISC_R_NOMEMORY); + dns_db_attach(db, &dummy); + ((struct secure_event *)e)->db = dummy; + INSIST(LOCKED_ZONE(zone->secure)); + zone_iattach(zone->secure, &secure); + isc_task_send(zone->secure->task, &e); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_SENDSECURE); + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_zone_replacedb(dns_zone_t *zone, dns_db_t *db, bool dump) { + isc_result_t result; + dns_zone_t *secure = NULL; + + REQUIRE(DNS_ZONE_VALID(zone)); + again: + LOCK_ZONE(zone); + if (inline_raw(zone)) { + secure = zone->secure; + INSIST(secure != zone); + TRYLOCK_ZONE(result, secure); + if (result != ISC_R_SUCCESS) { + UNLOCK_ZONE(zone); + secure = NULL; +#if ISC_PLATFORM_USETHREADS + isc_thread_yield(); +#endif + goto again; + } + } + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write); + result = zone_replacedb(zone, db, dump); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write); + if (secure != NULL) + UNLOCK_ZONE(secure); + UNLOCK_ZONE(zone); + return (result); +} + +static isc_result_t +zone_replacedb(dns_zone_t *zone, dns_db_t *db, bool dump) { + dns_dbversion_t *ver; + isc_result_t result; + unsigned int soacount = 0; + unsigned int nscount = 0; + + /* + * 'zone' and 'zonedb' locked by caller. + */ + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(LOCKED_ZONE(zone)); + if (inline_raw(zone)) + REQUIRE(LOCKED_ZONE(zone->secure)); + + result = dns_db_rpz_ready(db); + if (result != ISC_R_SUCCESS) + return (result); + + result = zone_get_from_db(zone, db, &nscount, &soacount, + NULL, NULL, NULL, NULL, NULL, NULL); + if (result == ISC_R_SUCCESS) { + if (soacount != 1) { + dns_zone_log(zone, ISC_LOG_ERROR, + "has %d SOA records", soacount); + result = DNS_R_BADZONE; + } + if (nscount == 0 && zone->type != dns_zone_key) { + dns_zone_log(zone, ISC_LOG_ERROR, "has no NS records"); + result = DNS_R_BADZONE; + } + if (result != ISC_R_SUCCESS) + return (result); + } else { + dns_zone_log(zone, ISC_LOG_ERROR, + "retrieving SOA and NS records failed: %s", + dns_result_totext(result)); + return (result); + } + + result = check_nsec3param(zone, db); + if (result != ISC_R_SUCCESS) + return (result); + + ver = NULL; + dns_db_currentversion(db, &ver); + + /* + * The initial version of a slave zone is always dumped; + * subsequent versions may be journaled instead if this + * is enabled in the configuration. + */ + if (zone->db != NULL && zone->journal != NULL && + DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IXFRFROMDIFFS) && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FORCEXFER)) + { + uint32_t serial, oldserial; + + dns_zone_log(zone, ISC_LOG_DEBUG(3), "generating diffs"); + + result = dns_db_getsoaserial(db, ver, &serial); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "ixfr-from-differences: unable to get " + "new serial"); + goto fail; + } + + /* + * This is checked in zone_postload() for master zones. + */ + result = zone_get_from_db(zone, zone->db, NULL, &soacount, + &oldserial, NULL, NULL, NULL, NULL, + NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + RUNTIME_CHECK(soacount > 0U); + if ((zone->type == dns_zone_slave || + (zone->type == dns_zone_redirect && + zone->masters != NULL)) + && !isc_serial_gt(serial, oldserial)) { + uint32_t serialmin, serialmax; + serialmin = (oldserial + 1) & 0xffffffffU; + serialmax = (oldserial + 0x7fffffffU) & 0xffffffffU; + dns_zone_log(zone, ISC_LOG_ERROR, + "ixfr-from-differences: failed: " + "new serial (%u) out of range [%u - %u]", + serial, serialmin, serialmax); + result = ISC_R_RANGE; + goto fail; + } + + result = dns_db_diff(zone->mctx, db, ver, zone->db, NULL, + zone->journal); + if (result != ISC_R_SUCCESS) { + char strbuf[ISC_STRERRORSIZE]; + isc__strerror(errno, strbuf, sizeof(strbuf)); + dns_zone_log(zone, ISC_LOG_ERROR, + "ixfr-from-differences: failed: " + "%s", strbuf); + goto fallback; + } + if (dump) + zone_needdump(zone, DNS_DUMP_DELAY); + else if (zone->journalsize != -1) { + result = dns_journal_compact(zone->mctx, zone->journal, + serial, zone->journalsize); + switch (result) { + case ISC_R_SUCCESS: + case ISC_R_NOSPACE: + case ISC_R_NOTFOUND: + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "dns_journal_compact: %s", + dns_result_totext(result)); + break; + default: + dns_zone_log(zone, ISC_LOG_ERROR, + "dns_journal_compact failed: %s", + dns_result_totext(result)); + break; + } + } + if (zone->type == dns_zone_master && inline_raw(zone)) + zone_send_secureserial(zone, serial); + } else { + fallback: + if (dump && zone->masterfile != NULL) { + /* + * If DNS_ZONEFLG_FORCEXFER was set we don't want + * to keep the old masterfile. + */ + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FORCEXFER) && + remove(zone->masterfile) < 0 && errno != ENOENT) { + char strbuf[ISC_STRERRORSIZE]; + isc__strerror(errno, strbuf, sizeof(strbuf)); + isc_log_write(dns_lctx, + DNS_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_ZONE, + ISC_LOG_WARNING, + "unable to remove masterfile " + "'%s': '%s'", + zone->masterfile, strbuf); + } + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) == 0) + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NODELAY); + else + zone_needdump(zone, 0); + } + if (dump && zone->journal != NULL) { + /* + * The in-memory database just changed, and + * because 'dump' is set, it didn't change by + * being loaded from disk. Also, we have not + * journaled diffs for this change. + * Therefore, the on-disk journal is missing + * the deltas for this change. Since it can + * no longer be used to bring the zone + * up-to-date, it is useless and should be + * removed. + */ + isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_ZONE, ISC_LOG_DEBUG(3), + "removing journal file"); + if (remove(zone->journal) < 0 && errno != ENOENT) { + char strbuf[ISC_STRERRORSIZE]; + isc__strerror(errno, strbuf, sizeof(strbuf)); + isc_log_write(dns_lctx, + DNS_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_ZONE, + ISC_LOG_WARNING, + "unable to remove journal " + "'%s': '%s'", + zone->journal, strbuf); + } + } + + if (inline_raw(zone)) + zone_send_securedb(zone, db); + } + + dns_db_closeversion(db, &ver, false); + + dns_zone_log(zone, ISC_LOG_DEBUG(3), "replacing zone database"); + + if (zone->db != NULL) + zone_detachdb(zone); + zone_attachdb(zone, db); + dns_db_settask(zone->db, zone->task); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED|DNS_ZONEFLG_NEEDNOTIFY); + return (ISC_R_SUCCESS); + + fail: + dns_db_closeversion(db, &ver, false); + return (result); +} + +/* The caller must hold the dblock as a writer. */ +static inline void +zone_attachdb(dns_zone_t *zone, dns_db_t *db) { + REQUIRE(zone->db == NULL && db != NULL); + + dns_db_attach(db, &zone->db); + if (zone->acache != NULL) { + isc_result_t result; + result = dns_acache_setdb(zone->acache, db); + if (result != ISC_R_SUCCESS && result != ISC_R_EXISTS) { + UNEXPECTED_ERROR(__FILE__, __LINE__, + "dns_acache_setdb() failed: %s", + isc_result_totext(result)); + } + } +} + +/* The caller must hold the dblock as a writer. */ +static inline void +zone_detachdb(dns_zone_t *zone) { + REQUIRE(zone->db != NULL); + + if (zone->acache != NULL) + (void)dns_acache_putdb(zone->acache, zone->db); + dns_db_detach(&zone->db); +} + +static void +zone_xfrdone(dns_zone_t *zone, isc_result_t result) { + isc_time_t now; + bool again = false; + unsigned int soacount; + unsigned int nscount; + uint32_t serial, refresh, retry, expire, minimum; + isc_result_t xfrresult = result; + bool free_needed; + dns_zone_t *secure = NULL; + + REQUIRE(DNS_ZONE_VALID(zone)); + + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "zone transfer finished: %s", dns_result_totext(result)); + + /* + * Obtaining a lock on the zone->secure (see zone_send_secureserial) + * could result in a deadlock due to a LOR so we will spin if we + * can't obtain the both locks. + */ + again: + LOCK_ZONE(zone); + if (inline_raw(zone)) { + secure = zone->secure; + INSIST(secure != zone); + TRYLOCK_ZONE(result, secure); + if (result != ISC_R_SUCCESS) { + UNLOCK_ZONE(zone); + secure = NULL; +#if ISC_PLATFORM_USETHREADS + isc_thread_yield(); +#endif + goto again; + } + } + + INSIST((zone->flags & DNS_ZONEFLG_REFRESH) != 0); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_SOABEFOREAXFR); + + TIME_NOW(&now); + switch (xfrresult) { + case ISC_R_SUCCESS: + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY); + /* FALLTHROUGH */ + case DNS_R_UPTODATE: + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_FORCEXFER); + /* + * Has the zone expired underneath us? + */ + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db == NULL) { + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + goto same_master; + } + + /* + * Update the zone structure's data from the actual + * SOA received. + */ + nscount = 0; + soacount = 0; + INSIST(zone->db != NULL); + result = zone_get_from_db(zone, zone->db, &nscount, + &soacount, &serial, &refresh, + &retry, &expire, &minimum, NULL); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + if (result == ISC_R_SUCCESS) { + if (soacount != 1) + dns_zone_log(zone, ISC_LOG_ERROR, + "transferred zone " + "has %d SOA record%s", soacount, + (soacount != 0) ? "s" : ""); + if (nscount == 0) { + dns_zone_log(zone, ISC_LOG_ERROR, + "transferred zone " + "has no NS records"); + if (DNS_ZONE_FLAG(zone, + DNS_ZONEFLG_HAVETIMERS)) { + zone->refresh = DNS_ZONE_DEFAULTREFRESH; + zone->retry = DNS_ZONE_DEFAULTRETRY; + } + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_HAVETIMERS); + zone_unload(zone); + goto next_master; + } + zone->refresh = RANGE(refresh, zone->minrefresh, + zone->maxrefresh); + zone->retry = RANGE(retry, zone->minretry, + zone->maxretry); + zone->expire = RANGE(expire, + zone->refresh + zone->retry, + DNS_MAX_EXPIRE); + zone->minimum = minimum; + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_HAVETIMERS); + } + + /* + * Set our next update/expire times. + */ + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDREFRESH)) { + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDREFRESH); + zone->refreshtime = now; + DNS_ZONE_TIME_ADD(&now, zone->expire, + &zone->expiretime); + } else { + DNS_ZONE_JITTER_ADD(&now, zone->refresh, + &zone->refreshtime); + DNS_ZONE_TIME_ADD(&now, zone->expire, + &zone->expiretime); + } + if (result == ISC_R_SUCCESS && xfrresult == ISC_R_SUCCESS) { + char buf[DNS_NAME_FORMATSIZE + sizeof(": TSIG ''")]; + if (zone->tsigkey != NULL) { + char namebuf[DNS_NAME_FORMATSIZE]; + dns_name_format(&zone->tsigkey->name, namebuf, + sizeof(namebuf)); + snprintf(buf, sizeof(buf), ": TSIG '%s'", + namebuf); + } else + buf[0] = '\0'; + dns_zone_log(zone, ISC_LOG_INFO, + "transferred serial %u%s", + serial, buf); + if (inline_raw(zone)) + zone_send_secureserial(zone, serial); + } + + /* + * This is not necessary if we just performed a AXFR + * however it is necessary for an IXFR / UPTODATE and + * won't hurt with an AXFR. + */ + if (zone->masterfile != NULL || zone->journal != NULL) { + unsigned int delay = DNS_DUMP_DELAY; + + result = ISC_R_FAILURE; + if (zone->journal != NULL) + result = isc_file_settime(zone->journal, &now); + if (result != ISC_R_SUCCESS && + zone->masterfile != NULL) + result = isc_file_settime(zone->masterfile, + &now); + + if ((DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NODELAY) != 0) || + result == ISC_R_FILENOTFOUND) + delay = 0; + + if ((result == ISC_R_SUCCESS || + result == ISC_R_FILENOTFOUND) && + zone->masterfile != NULL) + zone_needdump(zone, delay); + else if (result != ISC_R_SUCCESS) + dns_zone_log(zone, ISC_LOG_ERROR, + "transfer: could not set file " + "modification time of '%s': %s", + zone->masterfile, + dns_result_totext(result)); + } + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NODELAY); + inc_stats(zone, dns_zonestatscounter_xfrsuccess); + break; + + case DNS_R_BADIXFR: + /* Force retry with AXFR. */ + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLAG_NOIXFR); + goto same_master; + + case DNS_R_TOOMANYRECORDS: + DNS_ZONE_JITTER_ADD(&now, zone->refresh, &zone->refreshtime); + inc_stats(zone, dns_zonestatscounter_xfrfail); + break; + + default: + next_master: + /* + * Skip to next failed / untried master. + */ + do { + zone->curmaster++; + } while (zone->curmaster < zone->masterscnt && + zone->mastersok[zone->curmaster]); + /* FALLTHROUGH */ + same_master: + if (zone->curmaster >= zone->masterscnt) { + zone->curmaster = 0; + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_USEALTXFRSRC) && + !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) { + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_REFRESH); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC); + while (zone->curmaster < zone->masterscnt && + zone->mastersok[zone->curmaster]) + zone->curmaster++; + again = true; + } else + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC); + } else { + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_REFRESH); + again = true; + } + inc_stats(zone, dns_zonestatscounter_xfrfail); + break; + } + zone_settimer(zone, &now); + + /* + * If creating the transfer object failed, zone->xfr is NULL. + * Otherwise, we are called as the done callback of a zone + * transfer object that just entered its shutting-down + * state. Since we are no longer responsible for shutting + * it down, we can detach our reference. + */ + if (zone->xfr != NULL) + dns_xfrin_detach(&zone->xfr); + + if (zone->tsigkey != NULL) + dns_tsigkey_detach(&zone->tsigkey); + + /* + * Handle any deferred journal compaction. + */ + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDCOMPACT)) { + result = dns_journal_compact(zone->mctx, zone->journal, + zone->compact_serial, + zone->journalsize); + switch (result) { + case ISC_R_SUCCESS: + case ISC_R_NOSPACE: + case ISC_R_NOTFOUND: + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "dns_journal_compact: %s", + dns_result_totext(result)); + break; + default: + dns_zone_log(zone, ISC_LOG_ERROR, + "dns_journal_compact failed: %s", + dns_result_totext(result)); + break; + } + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDCOMPACT); + } + + if (secure != NULL) + UNLOCK_ZONE(secure); + /* + * This transfer finishing freed up a transfer quota slot. + * Let any other zones waiting for quota have it. + */ + if (zone->zmgr != NULL && + zone->statelist == &zone->zmgr->xfrin_in_progress) { + UNLOCK_ZONE(zone); + RWLOCK(&zone->zmgr->rwlock, isc_rwlocktype_write); + ISC_LIST_UNLINK(zone->zmgr->xfrin_in_progress, zone, statelink); + zone->statelist = NULL; + zmgr_resume_xfrs(zone->zmgr, false); + RWUNLOCK(&zone->zmgr->rwlock, isc_rwlocktype_write); + LOCK_ZONE(zone); + } + + /* + * Retry with a different server if necessary. + */ + if (again && !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) + queue_soa_query(zone); + + INSIST(zone->irefs > 0); + zone->irefs--; + free_needed = exit_check(zone); + UNLOCK_ZONE(zone); + if (free_needed) + zone_free(zone); +} + +static void +zone_loaddone(void *arg, isc_result_t result) { + static char me[] = "zone_loaddone"; + dns_load_t *load = arg; + dns_zone_t *zone; + isc_result_t tresult; + dns_zone_t *secure = NULL; + + REQUIRE(DNS_LOAD_VALID(load)); + zone = load->zone; + + ENTER; + + tresult = dns_db_endload(load->db, &load->callbacks); + if (tresult != ISC_R_SUCCESS && + (result == ISC_R_SUCCESS || result == DNS_R_SEENINCLUDE)) + result = tresult; + + /* + * Lock hierarchy: zmgr, zone, raw. + */ + again: + LOCK_ZONE(zone); + INSIST(zone != zone->raw); + if (inline_secure(zone)) + LOCK_ZONE(zone->raw); + else if (inline_raw(zone)) { + secure = zone->secure; + TRYLOCK_ZONE(result, secure); + if (result != ISC_R_SUCCESS) { + UNLOCK_ZONE(zone); + secure = NULL; +#if ISC_PLATFORM_USETHREADS + isc_thread_yield(); +#endif + goto again; + } + } + (void)zone_postload(zone, load->db, load->loadtime, result); + zonemgr_putio(&zone->readio); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_LOADING); + zone_idetach(&load->callbacks.zone); + /* + * Leave the zone frozen if the reload fails. + */ + if ((result == ISC_R_SUCCESS || result == DNS_R_SEENINCLUDE) && + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_THAW)) + zone->update_disabled = false; + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_THAW); + if (inline_secure(zone)) + UNLOCK_ZONE(zone->raw); + else if (secure != NULL) + UNLOCK_ZONE(secure); + UNLOCK_ZONE(zone); + + load->magic = 0; + dns_db_detach(&load->db); + if (load->zone->lctx != NULL) + dns_loadctx_detach(&load->zone->lctx); + dns_zone_idetach(&load->zone); + isc_mem_putanddetach(&load->mctx, load, sizeof(*load)); +} + +void +dns_zone_getssutable(dns_zone_t *zone, dns_ssutable_t **table) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(table != NULL); + REQUIRE(*table == NULL); + + LOCK_ZONE(zone); + if (zone->ssutable != NULL) + dns_ssutable_attach(zone->ssutable, table); + UNLOCK_ZONE(zone); +} + +void +dns_zone_setssutable(dns_zone_t *zone, dns_ssutable_t *table) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->ssutable != NULL) + dns_ssutable_detach(&zone->ssutable); + if (table != NULL) + dns_ssutable_attach(table, &zone->ssutable); + UNLOCK_ZONE(zone); +} + +void +dns_zone_setsigvalidityinterval(dns_zone_t *zone, uint32_t interval) { + REQUIRE(DNS_ZONE_VALID(zone)); + + zone->sigvalidityinterval = interval; +} + +uint32_t +dns_zone_getsigvalidityinterval(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->sigvalidityinterval); +} + +void +dns_zone_setsigresigninginterval(dns_zone_t *zone, uint32_t interval) { + isc_time_t now; + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->sigresigninginterval = interval; + set_resigntime(zone); + if (zone->task != NULL) { + TIME_NOW(&now); + zone_settimer(zone, &now); + } + UNLOCK_ZONE(zone); +} + +uint32_t +dns_zone_getsigresigninginterval(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->sigresigninginterval); +} + +static void +queue_xfrin(dns_zone_t *zone) { + const char me[] = "queue_xfrin"; + isc_result_t result; + dns_zonemgr_t *zmgr = zone->zmgr; + + ENTER; + + INSIST(zone->statelist == NULL); + + RWLOCK(&zmgr->rwlock, isc_rwlocktype_write); + ISC_LIST_APPEND(zmgr->waiting_for_xfrin, zone, statelink); + LOCK_ZONE(zone); + zone->irefs++; + UNLOCK_ZONE(zone); + zone->statelist = &zmgr->waiting_for_xfrin; + result = zmgr_start_xfrin_ifquota(zmgr, zone); + RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write); + + if (result == ISC_R_QUOTA) { + dns_zone_logc(zone, DNS_LOGCATEGORY_XFER_IN, ISC_LOG_INFO, + "zone transfer deferred due to quota"); + } else if (result != ISC_R_SUCCESS) { + dns_zone_logc(zone, DNS_LOGCATEGORY_XFER_IN, ISC_LOG_ERROR, + "starting zone transfer: %s", + isc_result_totext(result)); + } +} + +/* + * This event callback is called when a zone has received + * any necessary zone transfer quota. This is the time + * to go ahead and start the transfer. + */ +static void +got_transfer_quota(isc_task_t *task, isc_event_t *event) { + isc_result_t result = ISC_R_SUCCESS; + dns_peer_t *peer = NULL; + char master[ISC_SOCKADDR_FORMATSIZE]; + char source[ISC_SOCKADDR_FORMATSIZE]; + dns_rdatatype_t xfrtype; + dns_zone_t *zone = event->ev_arg; + isc_netaddr_t masterip; + isc_sockaddr_t sourceaddr; + isc_sockaddr_t masteraddr; + isc_time_t now; + const char *soa_before = ""; + isc_dscp_t dscp = -1; + bool loaded; + + UNUSED(task); + + INSIST(task == zone->task); + + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) { + result = ISC_R_CANCELED; + goto cleanup; + } + + TIME_NOW(&now); + + isc_sockaddr_format(&zone->masteraddr, master, sizeof(master)); + if (dns_zonemgr_unreachable(zone->zmgr, &zone->masteraddr, + &zone->sourceaddr, &now)) + { + isc_sockaddr_format(&zone->sourceaddr, source, sizeof(source)); + dns_zone_log(zone, ISC_LOG_INFO, + "got_transfer_quota: skipping zone transfer as " + "master %s (source %s) is unreachable (cached)", + master, source); + result = ISC_R_CANCELED; + goto cleanup; + } + + isc_netaddr_fromsockaddr(&masterip, &zone->masteraddr); + (void)dns_peerlist_peerbyaddr(zone->view->peers, &masterip, &peer); + + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_SOABEFOREAXFR)) + soa_before = "SOA before "; + /* + * Decide whether we should request IXFR or AXFR. + */ + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + loaded = (zone->db != NULL); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + + if (!loaded) { + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "no database exists yet, requesting AXFR of " + "initial version from %s", master); + xfrtype = dns_rdatatype_axfr; + } else if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FORCEXFER)) { + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "forced reload, requesting AXFR of " + "initial version from %s", master); + xfrtype = dns_rdatatype_axfr; + } else if (DNS_ZONE_FLAG(zone, DNS_ZONEFLAG_NOIXFR)) { + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "retrying with AXFR from %s due to " + "previous IXFR failure", master); + xfrtype = dns_rdatatype_axfr; + LOCK_ZONE(zone); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLAG_NOIXFR); + UNLOCK_ZONE(zone); + } else { + bool use_ixfr = true; + if (peer != NULL) + result = dns_peer_getrequestixfr(peer, &use_ixfr); + if (peer == NULL || result != ISC_R_SUCCESS) + use_ixfr = zone->requestixfr; + if (use_ixfr == false) { + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "IXFR disabled, requesting %sAXFR from %s", + soa_before, master); + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_SOABEFOREAXFR)) + xfrtype = dns_rdatatype_soa; + else + xfrtype = dns_rdatatype_axfr; + } else { + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "requesting IXFR from %s", master); + xfrtype = dns_rdatatype_ixfr; + } + } + + /* + * Determine if we should attempt to sign the request with TSIG. + */ + result = ISC_R_NOTFOUND; + + /* + * First, look for a tsig key in the master statement, then + * try for a server key. + */ + if ((zone->masterkeynames != NULL) && + (zone->masterkeynames[zone->curmaster] != NULL)) { + dns_view_t *view = dns_zone_getview(zone); + dns_name_t *keyname = zone->masterkeynames[zone->curmaster]; + result = dns_view_gettsig(view, keyname, &zone->tsigkey); + } + if (zone->tsigkey == NULL) + result = dns_view_getpeertsig(zone->view, &masterip, + &zone->tsigkey); + + if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) { + dns_zone_log(zone, ISC_LOG_ERROR, + "could not get TSIG key for zone transfer: %s", + isc_result_totext(result)); + } + + if (zone->masterdscps != NULL) + dscp = zone->masterdscps[zone->curmaster]; + + LOCK_ZONE(zone); + masteraddr = zone->masteraddr; + sourceaddr = zone->sourceaddr; + switch (isc_sockaddr_pf(&masteraddr)) { + case PF_INET: + if (dscp == -1) + dscp = zone->xfrsource4dscp; + break; + case PF_INET6: + if (dscp == -1) + dscp = zone->xfrsource6dscp; + break; + default: + INSIST(0); + }; + UNLOCK_ZONE(zone); + INSIST(isc_sockaddr_pf(&masteraddr) == isc_sockaddr_pf(&sourceaddr)); + result = dns_xfrin_create3(zone, xfrtype, &masteraddr, &sourceaddr, + dscp, zone->tsigkey, zone->mctx, + zone->zmgr->timermgr, zone->zmgr->socketmgr, + zone->task, zone_xfrdone, &zone->xfr); + if (result == ISC_R_SUCCESS) { + LOCK_ZONE(zone); + if (xfrtype == dns_rdatatype_axfr) { + if (isc_sockaddr_pf(&masteraddr) == PF_INET) + inc_stats(zone, dns_zonestatscounter_axfrreqv4); + else + inc_stats(zone, dns_zonestatscounter_axfrreqv6); + } else if (xfrtype == dns_rdatatype_ixfr) { + if (isc_sockaddr_pf(&masteraddr) == PF_INET) + inc_stats(zone, dns_zonestatscounter_ixfrreqv4); + else + inc_stats(zone, dns_zonestatscounter_ixfrreqv6); + } + UNLOCK_ZONE(zone); + } + cleanup: + /* + * Any failure in this function is handled like a failed + * zone transfer. This ensures that we get removed from + * zmgr->xfrin_in_progress. + */ + if (result != ISC_R_SUCCESS) + zone_xfrdone(zone, result); + + isc_event_free(&event); +} + +/* + * Update forwarding support. + */ + +static void +forward_destroy(dns_forward_t *forward) { + + forward->magic = 0; + if (forward->request != NULL) + dns_request_destroy(&forward->request); + if (forward->msgbuf != NULL) + isc_buffer_free(&forward->msgbuf); + if (forward->zone != NULL) { + LOCK(&forward->zone->lock); + if (ISC_LINK_LINKED(forward, link)) + ISC_LIST_UNLINK(forward->zone->forwards, forward, link); + UNLOCK(&forward->zone->lock); + dns_zone_idetach(&forward->zone); + } + isc_mem_putanddetach(&forward->mctx, forward, sizeof(*forward)); +} + +static isc_result_t +sendtomaster(dns_forward_t *forward) { + isc_result_t result; + isc_sockaddr_t src; + isc_dscp_t dscp = -1; + + LOCK_ZONE(forward->zone); + + if (DNS_ZONE_FLAG(forward->zone, DNS_ZONEFLG_EXITING)) { + UNLOCK_ZONE(forward->zone); + return (ISC_R_CANCELED); + } + + if (forward->which >= forward->zone->masterscnt) { + UNLOCK_ZONE(forward->zone); + return (ISC_R_NOMORE); + } + + forward->addr = forward->zone->masters[forward->which]; + /* + * Always use TCP regardless of whether the original update + * used TCP. + * XXX The timeout may but a bit small if we are far down a + * transfer graph and the master has to try several masters. + */ + switch (isc_sockaddr_pf(&forward->addr)) { + case PF_INET: + src = forward->zone->xfrsource4; + dscp = forward->zone->xfrsource4dscp; + break; + case PF_INET6: + src = forward->zone->xfrsource6; + dscp = forward->zone->xfrsource6dscp; + break; + default: + result = ISC_R_NOTIMPLEMENTED; + goto unlock; + } + result = dns_request_createraw4(forward->zone->view->requestmgr, + forward->msgbuf, + &src, &forward->addr, dscp, + forward->options, 15 /* XXX */, + 0, 0, forward->zone->task, + forward_callback, forward, + &forward->request); + if (result == ISC_R_SUCCESS) { + if (!ISC_LINK_LINKED(forward, link)) + ISC_LIST_APPEND(forward->zone->forwards, forward, link); + } + + unlock: + UNLOCK_ZONE(forward->zone); + return (result); +} + +static void +forward_callback(isc_task_t *task, isc_event_t *event) { + const char me[] = "forward_callback"; + dns_requestevent_t *revent = (dns_requestevent_t *)event; + dns_message_t *msg = NULL; + char master[ISC_SOCKADDR_FORMATSIZE]; + isc_result_t result; + dns_forward_t *forward; + dns_zone_t *zone; + + UNUSED(task); + + forward = revent->ev_arg; + INSIST(DNS_FORWARD_VALID(forward)); + zone = forward->zone; + INSIST(DNS_ZONE_VALID(zone)); + + ENTER; + + isc_sockaddr_format(&forward->addr, master, sizeof(master)); + + if (revent->result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_INFO, + "could not forward dynamic update to %s: %s", + master, dns_result_totext(revent->result)); + goto next_master; + } + + result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTPARSE, &msg); + if (result != ISC_R_SUCCESS) + goto next_master; + + result = dns_request_getresponse(revent->request, msg, + DNS_MESSAGEPARSE_PRESERVEORDER | + DNS_MESSAGEPARSE_CLONEBUFFER); + if (result != ISC_R_SUCCESS) + goto next_master; + + switch (msg->rcode) { + /* + * Pass these rcodes back to client. + */ + case dns_rcode_noerror: + case dns_rcode_yxdomain: + case dns_rcode_yxrrset: + case dns_rcode_nxrrset: + case dns_rcode_refused: + case dns_rcode_nxdomain: { + char rcode[128]; + isc_buffer_t rb; + + isc_buffer_init(&rb, rcode, sizeof(rcode)); + (void)dns_rcode_totext(msg->rcode, &rb); + dns_zone_log(zone, ISC_LOG_INFO, + "forwarded dynamic update: " + "master %s returned: %.*s", + master, (int)rb.used, rcode); + break; + } + + /* These should not occur if the masters/zone are valid. */ + case dns_rcode_notzone: + case dns_rcode_notauth: { + char rcode[128]; + isc_buffer_t rb; + + isc_buffer_init(&rb, rcode, sizeof(rcode)); + (void)dns_rcode_totext(msg->rcode, &rb); + dns_zone_log(zone, ISC_LOG_WARNING, + "forwarding dynamic update: " + "unexpected response: master %s returned: %.*s", + master, (int)rb.used, rcode); + goto next_master; + } + + /* Try another server for these rcodes. */ + case dns_rcode_formerr: + case dns_rcode_servfail: + case dns_rcode_notimp: + case dns_rcode_badvers: + default: + goto next_master; + } + + /* call callback */ + (forward->callback)(forward->callback_arg, ISC_R_SUCCESS, msg); + msg = NULL; + dns_request_destroy(&forward->request); + forward_destroy(forward); + isc_event_free(&event); + return; + + next_master: + if (msg != NULL) + dns_message_destroy(&msg); + isc_event_free(&event); + forward->which++; + dns_request_destroy(&forward->request); + result = sendtomaster(forward); + if (result != ISC_R_SUCCESS) { + /* call callback */ + dns_zone_log(zone, ISC_LOG_DEBUG(3), + "exhausted dynamic update forwarder list"); + (forward->callback)(forward->callback_arg, result, NULL); + forward_destroy(forward); + } +} + +isc_result_t +dns_zone_forwardupdate(dns_zone_t *zone, dns_message_t *msg, + dns_updatecallback_t callback, void *callback_arg) +{ + dns_forward_t *forward; + isc_result_t result; + isc_region_t *mr; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(msg != NULL); + REQUIRE(callback != NULL); + + forward = isc_mem_get(zone->mctx, sizeof(*forward)); + if (forward == NULL) + return (ISC_R_NOMEMORY); + + forward->request = NULL; + forward->zone = NULL; + forward->msgbuf = NULL; + forward->which = 0; + forward->mctx = 0; + forward->callback = callback; + forward->callback_arg = callback_arg; + ISC_LINK_INIT(forward, link); + forward->magic = FORWARD_MAGIC; + forward->options = DNS_REQUESTOPT_TCP; + /* + * If we have a SIG(0) signed message we need to preserve the + * query id as that is included in the SIG(0) computation. + */ + if (msg->sig0 != NULL) + forward->options |= DNS_REQUESTOPT_FIXEDID; + + mr = dns_message_getrawmessage(msg); + if (mr == NULL) { + result = ISC_R_UNEXPECTEDEND; + goto cleanup; + } + + result = isc_buffer_allocate(zone->mctx, &forward->msgbuf, mr->length); + if (result != ISC_R_SUCCESS) + goto cleanup; + result = isc_buffer_copyregion(forward->msgbuf, mr); + if (result != ISC_R_SUCCESS) + goto cleanup; + + isc_mem_attach(zone->mctx, &forward->mctx); + dns_zone_iattach(zone, &forward->zone); + result = sendtomaster(forward); + + cleanup: + if (result != ISC_R_SUCCESS) { + forward_destroy(forward); + } + return (result); +} + +isc_result_t +dns_zone_next(dns_zone_t *zone, dns_zone_t **next) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(next != NULL && *next == NULL); + + *next = ISC_LIST_NEXT(zone, link); + if (*next == NULL) + return (ISC_R_NOMORE); + else + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_zone_first(dns_zonemgr_t *zmgr, dns_zone_t **first) { + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + REQUIRE(first != NULL && *first == NULL); + + *first = ISC_LIST_HEAD(zmgr->zones); + if (*first == NULL) + return (ISC_R_NOMORE); + else + return (ISC_R_SUCCESS); +} + +/*** + *** Zone manager. + ***/ + +isc_result_t +dns_zonemgr_create(isc_mem_t *mctx, isc_taskmgr_t *taskmgr, + isc_timermgr_t *timermgr, isc_socketmgr_t *socketmgr, + dns_zonemgr_t **zmgrp) +{ + dns_zonemgr_t *zmgr; + isc_result_t result; + + zmgr = isc_mem_get(mctx, sizeof(*zmgr)); + if (zmgr == NULL) + return (ISC_R_NOMEMORY); + zmgr->mctx = NULL; + zmgr->refs = 1; + isc_mem_attach(mctx, &zmgr->mctx); + zmgr->taskmgr = taskmgr; + zmgr->timermgr = timermgr; + zmgr->socketmgr = socketmgr; + zmgr->zonetasks = NULL; + zmgr->loadtasks = NULL; + zmgr->mctxpool = NULL; + zmgr->task = NULL; + zmgr->notifyrl = NULL; + zmgr->refreshrl = NULL; + zmgr->startupnotifyrl = NULL; + zmgr->startuprefreshrl = NULL; + ISC_LIST_INIT(zmgr->zones); + ISC_LIST_INIT(zmgr->waiting_for_xfrin); + ISC_LIST_INIT(zmgr->xfrin_in_progress); + memset(zmgr->unreachable, 0, sizeof(zmgr->unreachable)); + result = isc_rwlock_init(&zmgr->rwlock, 0, 0); + if (result != ISC_R_SUCCESS) + goto free_mem; + + zmgr->transfersin = 10; + zmgr->transfersperns = 2; + + /* Unreachable lock. */ + result = isc_rwlock_init(&zmgr->urlock, 0, 0); + if (result != ISC_R_SUCCESS) + goto free_rwlock; + + /* Create a single task for queueing of SOA queries. */ + result = isc_task_create(taskmgr, 1, &zmgr->task); + if (result != ISC_R_SUCCESS) + goto free_urlock; + + isc_task_setname(zmgr->task, "zmgr", zmgr); + result = isc_ratelimiter_create(mctx, timermgr, zmgr->task, + &zmgr->notifyrl); + if (result != ISC_R_SUCCESS) + goto free_task; + + result = isc_ratelimiter_create(mctx, timermgr, zmgr->task, + &zmgr->refreshrl); + if (result != ISC_R_SUCCESS) + goto free_notifyrl; + + result = isc_ratelimiter_create(mctx, timermgr, zmgr->task, + &zmgr->startupnotifyrl); + if (result != ISC_R_SUCCESS) + goto free_refreshrl; + + result = isc_ratelimiter_create(mctx, timermgr, zmgr->task, + &zmgr->startuprefreshrl); + if (result != ISC_R_SUCCESS) + goto free_startupnotifyrl; + + /* default to 20 refresh queries / notifies per second. */ + setrl(zmgr->notifyrl, &zmgr->notifyrate, 20); + setrl(zmgr->startupnotifyrl, &zmgr->startupnotifyrate, 20); + setrl(zmgr->refreshrl, &zmgr->serialqueryrate, 20); + setrl(zmgr->startuprefreshrl, &zmgr->startupserialqueryrate, 20); + isc_ratelimiter_setpushpop(zmgr->startupnotifyrl, true); + isc_ratelimiter_setpushpop(zmgr->startuprefreshrl, true); + + zmgr->iolimit = 1; + zmgr->ioactive = 0; + ISC_LIST_INIT(zmgr->high); + ISC_LIST_INIT(zmgr->low); + + result = isc_mutex_init(&zmgr->iolock); + if (result != ISC_R_SUCCESS) + goto free_startuprefreshrl; + + zmgr->magic = ZONEMGR_MAGIC; + + *zmgrp = zmgr; + return (ISC_R_SUCCESS); + +#if 0 + free_iolock: + DESTROYLOCK(&zmgr->iolock); +#endif + free_startuprefreshrl: + isc_ratelimiter_detach(&zmgr->startuprefreshrl); + free_startupnotifyrl: + isc_ratelimiter_detach(&zmgr->startupnotifyrl); + free_refreshrl: + isc_ratelimiter_detach(&zmgr->refreshrl); + free_notifyrl: + isc_ratelimiter_detach(&zmgr->notifyrl); + free_task: + isc_task_detach(&zmgr->task); + free_urlock: + isc_rwlock_destroy(&zmgr->urlock); + free_rwlock: + isc_rwlock_destroy(&zmgr->rwlock); + free_mem: + isc_mem_put(zmgr->mctx, zmgr, sizeof(*zmgr)); + isc_mem_detach(&mctx); + return (result); +} + +isc_result_t +dns_zonemgr_createzone(dns_zonemgr_t *zmgr, dns_zone_t **zonep) { + isc_result_t result; + isc_mem_t *mctx = NULL; + dns_zone_t *zone = NULL; + void *item; + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + REQUIRE(zonep != NULL && *zonep == NULL); + + if (zmgr->mctxpool == NULL) + return (ISC_R_FAILURE); + + item = isc_pool_get(zmgr->mctxpool); + if (item == NULL) + return (ISC_R_FAILURE); + + isc_mem_attach((isc_mem_t *) item, &mctx); + result = dns_zone_create(&zone, mctx); + isc_mem_detach(&mctx); + + if (result == ISC_R_SUCCESS) + *zonep = zone; + + return (result); +} + +isc_result_t +dns_zonemgr_managezone(dns_zonemgr_t *zmgr, dns_zone_t *zone) { + isc_result_t result; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + if (zmgr->zonetasks == NULL) + return (ISC_R_FAILURE); + + RWLOCK(&zmgr->rwlock, isc_rwlocktype_write); + LOCK_ZONE(zone); + REQUIRE(zone->task == NULL); + REQUIRE(zone->timer == NULL); + REQUIRE(zone->zmgr == NULL); + + isc_taskpool_gettask(zmgr->zonetasks, &zone->task); + isc_taskpool_gettask(zmgr->loadtasks, &zone->loadtask); + + /* + * Set the task name. The tag will arbitrarily point to one + * of the zones sharing the task (in practice, the one + * to be managed last). + */ + isc_task_setname(zone->task, "zone", zone); + isc_task_setname(zone->loadtask, "loadzone", zone); + + result = isc_timer_create(zmgr->timermgr, isc_timertype_inactive, + NULL, NULL, + zone->task, zone_timer, zone, + &zone->timer); + + if (result != ISC_R_SUCCESS) + goto cleanup_tasks; + + /* + * The timer "holds" a iref. + */ + zone->irefs++; + INSIST(zone->irefs != 0); + + ISC_LIST_APPEND(zmgr->zones, zone, link); + zone->zmgr = zmgr; + zmgr->refs++; + + goto unlock; + + cleanup_tasks: + isc_task_detach(&zone->loadtask); + isc_task_detach(&zone->task); + + unlock: + UNLOCK_ZONE(zone); + RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write); + return (result); +} + +void +dns_zonemgr_releasezone(dns_zonemgr_t *zmgr, dns_zone_t *zone) { + bool free_now = false; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + REQUIRE(zone->zmgr == zmgr); + + RWLOCK(&zmgr->rwlock, isc_rwlocktype_write); + LOCK_ZONE(zone); + + ISC_LIST_UNLINK(zmgr->zones, zone, link); + zone->zmgr = NULL; + zmgr->refs--; + if (zmgr->refs == 0) + free_now = true; + + UNLOCK_ZONE(zone); + RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write); + + if (free_now) + zonemgr_free(zmgr); + ENSURE(zone->zmgr == NULL); +} + +void +dns_zonemgr_attach(dns_zonemgr_t *source, dns_zonemgr_t **target) { + REQUIRE(DNS_ZONEMGR_VALID(source)); + REQUIRE(target != NULL && *target == NULL); + + RWLOCK(&source->rwlock, isc_rwlocktype_write); + REQUIRE(source->refs > 0); + source->refs++; + INSIST(source->refs > 0); + RWUNLOCK(&source->rwlock, isc_rwlocktype_write); + *target = source; +} + +void +dns_zonemgr_detach(dns_zonemgr_t **zmgrp) { + dns_zonemgr_t *zmgr; + bool free_now = false; + + REQUIRE(zmgrp != NULL); + zmgr = *zmgrp; + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + RWLOCK(&zmgr->rwlock, isc_rwlocktype_write); + zmgr->refs--; + if (zmgr->refs == 0) + free_now = true; + RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write); + + if (free_now) + zonemgr_free(zmgr); + *zmgrp = NULL; +} + +isc_result_t +dns_zonemgr_forcemaint(dns_zonemgr_t *zmgr) { + dns_zone_t *p; + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + RWLOCK(&zmgr->rwlock, isc_rwlocktype_read); + for (p = ISC_LIST_HEAD(zmgr->zones); + p != NULL; + p = ISC_LIST_NEXT(p, link)) + { + dns_zone_maintenance(p); + } + RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_read); + + /* + * Recent configuration changes may have increased the + * amount of available transfers quota. Make sure any + * transfers currently blocked on quota get started if + * possible. + */ + RWLOCK(&zmgr->rwlock, isc_rwlocktype_write); + zmgr_resume_xfrs(zmgr, true); + RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write); + return (ISC_R_SUCCESS); +} + +void +dns_zonemgr_resumexfrs(dns_zonemgr_t *zmgr) { + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + RWLOCK(&zmgr->rwlock, isc_rwlocktype_write); + zmgr_resume_xfrs(zmgr, true); + RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write); +} + +void +dns_zonemgr_shutdown(dns_zonemgr_t *zmgr) { + dns_zone_t *zone; + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + isc_ratelimiter_shutdown(zmgr->notifyrl); + isc_ratelimiter_shutdown(zmgr->refreshrl); + isc_ratelimiter_shutdown(zmgr->startupnotifyrl); + isc_ratelimiter_shutdown(zmgr->startuprefreshrl); + + if (zmgr->task != NULL) + isc_task_destroy(&zmgr->task); + if (zmgr->zonetasks != NULL) + isc_taskpool_destroy(&zmgr->zonetasks); + if (zmgr->loadtasks != NULL) + isc_taskpool_destroy(&zmgr->loadtasks); + if (zmgr->mctxpool != NULL) + isc_pool_destroy(&zmgr->mctxpool); + + RWLOCK(&zmgr->rwlock, isc_rwlocktype_read); + for (zone = ISC_LIST_HEAD(zmgr->zones); + zone != NULL; + zone = ISC_LIST_NEXT(zone, link)) + { + LOCK_ZONE(zone); + forward_cancel(zone); + UNLOCK_ZONE(zone); + } + RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_read); +} + +static isc_result_t +mctxinit(void **target, void *arg) { + isc_result_t result; + isc_mem_t *mctx = NULL; + + UNUSED(arg); + + REQUIRE(target != NULL && *target == NULL); + + result = isc_mem_create(0, 0, &mctx); + if (result != ISC_R_SUCCESS) + return (result); + isc_mem_setname(mctx, "zonemgr-pool", NULL); + + *target = mctx; + return (ISC_R_SUCCESS); +} + +static void +mctxfree(void **target) { + isc_mem_t *mctx = *(isc_mem_t **) target; + isc_mem_detach(&mctx); + *target = NULL; +} + +#define ZONES_PER_TASK 100 +#define ZONES_PER_MCTX 1000 + +isc_result_t +dns_zonemgr_setsize(dns_zonemgr_t *zmgr, int num_zones) { + isc_result_t result; + int ntasks = num_zones / ZONES_PER_TASK; + int nmctx = num_zones / ZONES_PER_MCTX; + isc_taskpool_t *pool = NULL; + isc_pool_t *mctxpool = NULL; + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + /* + * For anything fewer than 1000 zones we use 10 tasks in + * the task pools. More than that, and we'll scale at one + * task per 100 zones. Similarly, for anything smaller than + * 2000 zones we use 2 memory contexts, then scale at 1:1000. + */ + if (ntasks < 10) + ntasks = 10; + if (nmctx < 2) + nmctx = 2; + + /* Create or resize the zone task pools. */ + if (zmgr->zonetasks == NULL) + result = isc_taskpool_create(zmgr->taskmgr, zmgr->mctx, + ntasks, 2, &pool); + else + result = isc_taskpool_expand(&zmgr->zonetasks, ntasks, &pool); + + if (result == ISC_R_SUCCESS) + zmgr->zonetasks = pool; + + pool = NULL; + if (zmgr->loadtasks == NULL) + result = isc_taskpool_create(zmgr->taskmgr, zmgr->mctx, + ntasks, 2, &pool); + else + result = isc_taskpool_expand(&zmgr->loadtasks, ntasks, &pool); + + if (result == ISC_R_SUCCESS) + zmgr->loadtasks = pool; + + /* + * We always set all tasks in the zone-load task pool to + * privileged. This prevents other tasks in the system from + * running while the server task manager is in privileged + * mode. + * + * NOTE: If we start using task privileges for any other + * part of the system than zone tasks, then this will need to be + * revisted. In that case we'd want to turn on privileges for + * zone tasks only when we were loading, and turn them off the + * rest of the time. For now, however, it's okay to just + * set it and forget it. + */ + isc_taskpool_setprivilege(zmgr->loadtasks, true); + + /* Create or resize the zone memory context pool. */ + if (zmgr->mctxpool == NULL) + result = isc_pool_create(zmgr->mctx, nmctx, mctxfree, + mctxinit, NULL, &mctxpool); + else + result = isc_pool_expand(&zmgr->mctxpool, nmctx, &mctxpool); + + if (result == ISC_R_SUCCESS) + zmgr->mctxpool = mctxpool; + + return (result); +} + +static void +zonemgr_free(dns_zonemgr_t *zmgr) { + isc_mem_t *mctx; + + INSIST(zmgr->refs == 0); + INSIST(ISC_LIST_EMPTY(zmgr->zones)); + + zmgr->magic = 0; + + DESTROYLOCK(&zmgr->iolock); + isc_ratelimiter_detach(&zmgr->notifyrl); + isc_ratelimiter_detach(&zmgr->refreshrl); + isc_ratelimiter_detach(&zmgr->startupnotifyrl); + isc_ratelimiter_detach(&zmgr->startuprefreshrl); + + isc_rwlock_destroy(&zmgr->urlock); + isc_rwlock_destroy(&zmgr->rwlock); + mctx = zmgr->mctx; + isc_mem_put(zmgr->mctx, zmgr, sizeof(*zmgr)); + isc_mem_detach(&mctx); +} + +void +dns_zonemgr_settransfersin(dns_zonemgr_t *zmgr, uint32_t value) { + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + zmgr->transfersin = value; +} + +uint32_t +dns_zonemgr_getttransfersin(dns_zonemgr_t *zmgr) { + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + return (zmgr->transfersin); +} + +void +dns_zonemgr_settransfersperns(dns_zonemgr_t *zmgr, uint32_t value) { + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + zmgr->transfersperns = value; +} + +uint32_t +dns_zonemgr_getttransfersperns(dns_zonemgr_t *zmgr) { + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + return (zmgr->transfersperns); +} + +/* + * Try to start a new incoming zone transfer to fill a quota + * slot that was just vacated. + * + * Requires: + * The zone manager is locked by the caller. + */ +static void +zmgr_resume_xfrs(dns_zonemgr_t *zmgr, bool multi) { + dns_zone_t *zone; + dns_zone_t *next; + + for (zone = ISC_LIST_HEAD(zmgr->waiting_for_xfrin); + zone != NULL; + zone = next) + { + isc_result_t result; + next = ISC_LIST_NEXT(zone, statelink); + result = zmgr_start_xfrin_ifquota(zmgr, zone); + if (result == ISC_R_SUCCESS) { + if (multi) + continue; + /* + * We successfully filled the slot. We're done. + */ + break; + } else if (result == ISC_R_QUOTA) { + /* + * Not enough quota. This is probably the per-server + * quota, because we usually get called when a unit of + * global quota has just been freed. Try the next + * zone, it may succeed if it uses another master. + */ + continue; + } else { + dns_zone_log(zone, ISC_LOG_DEBUG(1), + "starting zone transfer: %s", + isc_result_totext(result)); + break; + } + } +} + +/* + * Try to start an incoming zone transfer for 'zone', quota permitting. + * + * Requires: + * The zone manager is locked by the caller. + * + * Returns: + * ISC_R_SUCCESS There was enough quota and we attempted to + * start a transfer. zone_xfrdone() has been or will + * be called. + * ISC_R_QUOTA Not enough quota. + * Others Failure. + */ +static isc_result_t +zmgr_start_xfrin_ifquota(dns_zonemgr_t *zmgr, dns_zone_t *zone) { + dns_peer_t *peer = NULL; + isc_netaddr_t masterip; + uint32_t nxfrsin, nxfrsperns; + dns_zone_t *x; + uint32_t maxtransfersin, maxtransfersperns; + isc_event_t *e; + + /* + * If we are exiting just pretend we got quota so the zone will + * be cleaned up in the zone's task context. + */ + LOCK_ZONE(zone); + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) { + UNLOCK_ZONE(zone); + goto gotquota; + } + + /* + * Find any configured information about the server we'd + * like to transfer this zone from. + */ + isc_netaddr_fromsockaddr(&masterip, &zone->masteraddr); + (void)dns_peerlist_peerbyaddr(zone->view->peers, &masterip, &peer); + UNLOCK_ZONE(zone); + + /* + * Determine the total maximum number of simultaneous + * transfers allowed, and the maximum for this specific + * master. + */ + maxtransfersin = zmgr->transfersin; + maxtransfersperns = zmgr->transfersperns; + if (peer != NULL) + (void)dns_peer_gettransfers(peer, &maxtransfersperns); + + /* + * Count the total number of transfers that are in progress, + * and the number of transfers in progress from this master. + * We linearly scan a list of all transfers; if this turns + * out to be too slow, we could hash on the master address. + */ + nxfrsin = nxfrsperns = 0; + for (x = ISC_LIST_HEAD(zmgr->xfrin_in_progress); + x != NULL; + x = ISC_LIST_NEXT(x, statelink)) + { + isc_netaddr_t xip; + + LOCK_ZONE(x); + isc_netaddr_fromsockaddr(&xip, &x->masteraddr); + UNLOCK_ZONE(x); + + nxfrsin++; + if (isc_netaddr_equal(&xip, &masterip)) + nxfrsperns++; + } + + /* Enforce quota. */ + if (nxfrsin >= maxtransfersin) + return (ISC_R_QUOTA); + + if (nxfrsperns >= maxtransfersperns) + return (ISC_R_QUOTA); + + gotquota: + /* + * We have sufficient quota. Move the zone to the "xfrin_in_progress" + * list and send it an event to let it start the actual transfer in the + * context of its own task. + */ + e = isc_event_allocate(zmgr->mctx, zmgr, DNS_EVENT_ZONESTARTXFRIN, + got_transfer_quota, zone, sizeof(isc_event_t)); + if (e == NULL) + return (ISC_R_NOMEMORY); + + LOCK_ZONE(zone); + INSIST(zone->statelist == &zmgr->waiting_for_xfrin); + ISC_LIST_UNLINK(zmgr->waiting_for_xfrin, zone, statelink); + ISC_LIST_APPEND(zmgr->xfrin_in_progress, zone, statelink); + zone->statelist = &zmgr->xfrin_in_progress; + isc_task_send(zone->task, &e); + dns_zone_log(zone, ISC_LOG_INFO, "Transfer started."); + UNLOCK_ZONE(zone); + + return (ISC_R_SUCCESS); +} + +void +dns_zonemgr_setiolimit(dns_zonemgr_t *zmgr, uint32_t iolimit) { + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + REQUIRE(iolimit > 0); + + zmgr->iolimit = iolimit; +} + +uint32_t +dns_zonemgr_getiolimit(dns_zonemgr_t *zmgr) { + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + return (zmgr->iolimit); +} + +/* + * Get permission to request a file handle from the OS. + * An event will be sent to action when one is available. + * There are two queues available (high and low), the high + * queue will be serviced before the low one. + * + * zonemgr_putio() must be called after the event is delivered to + * 'action'. + */ + +static isc_result_t +zonemgr_getio(dns_zonemgr_t *zmgr, bool high, + isc_task_t *task, isc_taskaction_t action, void *arg, + dns_io_t **iop) +{ + dns_io_t *io; + bool queue; + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + REQUIRE(iop != NULL && *iop == NULL); + + io = isc_mem_get(zmgr->mctx, sizeof(*io)); + if (io == NULL) + return (ISC_R_NOMEMORY); + + io->event = isc_event_allocate(zmgr->mctx, task, DNS_EVENT_IOREADY, + action, arg, sizeof(*io->event)); + if (io->event == NULL) { + isc_mem_put(zmgr->mctx, io, sizeof(*io)); + return (ISC_R_NOMEMORY); + } + + io->zmgr = zmgr; + io->high = high; + io->task = NULL; + isc_task_attach(task, &io->task); + ISC_LINK_INIT(io, link); + io->magic = IO_MAGIC; + + LOCK(&zmgr->iolock); + zmgr->ioactive++; + queue = (zmgr->ioactive > zmgr->iolimit); + if (queue) { + if (io->high) + ISC_LIST_APPEND(zmgr->high, io, link); + else + ISC_LIST_APPEND(zmgr->low, io, link); + } + UNLOCK(&zmgr->iolock); + *iop = io; + + if (!queue) + isc_task_send(io->task, &io->event); + return (ISC_R_SUCCESS); +} + +static void +zonemgr_putio(dns_io_t **iop) { + dns_io_t *io; + dns_io_t *next; + dns_zonemgr_t *zmgr; + + REQUIRE(iop != NULL); + io = *iop; + REQUIRE(DNS_IO_VALID(io)); + + *iop = NULL; + + INSIST(!ISC_LINK_LINKED(io, link)); + INSIST(io->event == NULL); + + zmgr = io->zmgr; + isc_task_detach(&io->task); + io->magic = 0; + isc_mem_put(zmgr->mctx, io, sizeof(*io)); + + LOCK(&zmgr->iolock); + INSIST(zmgr->ioactive > 0); + zmgr->ioactive--; + next = HEAD(zmgr->high); + if (next == NULL) + next = HEAD(zmgr->low); + if (next != NULL) { + if (next->high) + ISC_LIST_UNLINK(zmgr->high, next, link); + else + ISC_LIST_UNLINK(zmgr->low, next, link); + INSIST(next->event != NULL); + } + UNLOCK(&zmgr->iolock); + if (next != NULL) + isc_task_send(next->task, &next->event); +} + +static void +zonemgr_cancelio(dns_io_t *io) { + bool send_event = false; + + REQUIRE(DNS_IO_VALID(io)); + + /* + * If we are queued to be run then dequeue. + */ + LOCK(&io->zmgr->iolock); + if (ISC_LINK_LINKED(io, link)) { + if (io->high) + ISC_LIST_UNLINK(io->zmgr->high, io, link); + else + ISC_LIST_UNLINK(io->zmgr->low, io, link); + + send_event = true; + INSIST(io->event != NULL); + } + UNLOCK(&io->zmgr->iolock); + if (send_event) { + io->event->ev_attributes |= ISC_EVENTATTR_CANCELED; + isc_task_send(io->task, &io->event); + } +} + +static void +zone_saveunique(dns_zone_t *zone, const char *path, const char *templat) { + char *buf; + int buflen; + isc_result_t result; + + buflen = strlen(path) + strlen(templat) + 2; + + buf = isc_mem_get(zone->mctx, buflen); + if (buf == NULL) + return; + + result = isc_file_template(path, templat, buf, buflen); + if (result != ISC_R_SUCCESS) + goto cleanup; + + result = isc_file_renameunique(path, buf); + if (result != ISC_R_SUCCESS) + goto cleanup; + + dns_zone_log(zone, ISC_LOG_WARNING, "unable to load from '%s'; " + "renaming file to '%s' for failure analysis and " + "retransferring.", path, buf); + + cleanup: + isc_mem_put(zone->mctx, buf, buflen); +} + +#if 0 +/* Hook for ondestroy notification from a database. */ + +static void +dns_zonemgr_dbdestroyed(isc_task_t *task, isc_event_t *event) { + dns_db_t *db = event->sender; + UNUSED(task); + + isc_event_free(&event); + + isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_ZONE, ISC_LOG_DEBUG(3), + "database (%p) destroyed", (void*) db); +} +#endif + +static void +setrl(isc_ratelimiter_t *rl, unsigned int *rate, unsigned int value) { + isc_interval_t interval; + uint32_t s, ns; + uint32_t pertic; + isc_result_t result; + + if (value == 0) + value = 1; + + if (value == 1) { + s = 1; + ns = 0; + pertic = 1; + } else if (value <= 10) { + s = 0; + ns = 1000000000 / value; + pertic = 1; + } else { + s = 0; + ns = (1000000000 / value) * 10; + pertic = 10; + } + + isc_interval_set(&interval, s, ns); + + result = isc_ratelimiter_setinterval(rl, &interval); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + isc_ratelimiter_setpertic(rl, pertic); + + *rate = value; +} + +void +dns_zonemgr_setnotifyrate(dns_zonemgr_t *zmgr, unsigned int value) { + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + setrl(zmgr->notifyrl, &zmgr->notifyrate, value); +} + +void +dns_zonemgr_setstartupnotifyrate(dns_zonemgr_t *zmgr, unsigned int value) { + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + setrl(zmgr->startupnotifyrl, &zmgr->startupnotifyrate, value); +} + +void +dns_zonemgr_setserialqueryrate(dns_zonemgr_t *zmgr, unsigned int value) { + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + setrl(zmgr->refreshrl, &zmgr->serialqueryrate, value); + /* XXXMPA seperate out once we have the code to support this. */ + setrl(zmgr->startuprefreshrl, &zmgr->startupserialqueryrate, value); +} + +unsigned int +dns_zonemgr_getnotifyrate(dns_zonemgr_t *zmgr) { + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + return (zmgr->notifyrate); +} + +unsigned int +dns_zonemgr_getstartupnotifyrate(dns_zonemgr_t *zmgr) { + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + return (zmgr->startupnotifyrate); +} + +unsigned int +dns_zonemgr_getserialqueryrate(dns_zonemgr_t *zmgr) { + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + return (zmgr->serialqueryrate); +} + +bool +dns_zonemgr_unreachable(dns_zonemgr_t *zmgr, isc_sockaddr_t *remote, + isc_sockaddr_t *local, isc_time_t *now) +{ + unsigned int i; + isc_rwlocktype_t locktype; + isc_result_t result; + uint32_t seconds = isc_time_seconds(now); + uint32_t count = 0; + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + locktype = isc_rwlocktype_read; + RWLOCK(&zmgr->urlock, locktype); + for (i = 0; i < UNREACH_CHACHE_SIZE; i++) { + if (zmgr->unreachable[i].expire >= seconds && + isc_sockaddr_equal(&zmgr->unreachable[i].remote, remote) && + isc_sockaddr_equal(&zmgr->unreachable[i].local, local)) { + result = isc_rwlock_tryupgrade(&zmgr->urlock); + if (result == ISC_R_SUCCESS) { + locktype = isc_rwlocktype_write; + zmgr->unreachable[i].last = seconds; + count = zmgr->unreachable[i].count; + } + break; + } + } + RWUNLOCK(&zmgr->urlock, locktype); + return (i < UNREACH_CHACHE_SIZE && count > 1U); +} + +void +dns_zonemgr_unreachabledel(dns_zonemgr_t *zmgr, isc_sockaddr_t *remote, + isc_sockaddr_t *local) +{ + unsigned int i; + isc_rwlocktype_t locktype; + isc_result_t result; + + char master[ISC_SOCKADDR_FORMATSIZE]; + char source[ISC_SOCKADDR_FORMATSIZE]; + + isc_sockaddr_format(remote, master, sizeof(master)); + isc_sockaddr_format(local, source, sizeof(source)); + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + locktype = isc_rwlocktype_read; + RWLOCK(&zmgr->urlock, locktype); + for (i = 0; i < UNREACH_CHACHE_SIZE; i++) { + if (isc_sockaddr_equal(&zmgr->unreachable[i].remote, remote) && + isc_sockaddr_equal(&zmgr->unreachable[i].local, local)) { + if (zmgr->unreachable[i].expire == 0) + break; + result = isc_rwlock_tryupgrade(&zmgr->urlock); + if (result == ISC_R_SUCCESS) { + locktype = isc_rwlocktype_write; + zmgr->unreachable[i].expire = 0; + isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_ZONE, ISC_LOG_INFO, + "master %s (source %s) deleted " + "from unreachable cache", + master, source); + } + break; + } + } + RWUNLOCK(&zmgr->urlock, locktype); +} + +void +dns_zonemgr_unreachableadd(dns_zonemgr_t *zmgr, isc_sockaddr_t *remote, + isc_sockaddr_t *local, isc_time_t *now) +{ + uint32_t seconds = isc_time_seconds(now); + uint32_t last = seconds; + unsigned int i, slot = UNREACH_CHACHE_SIZE, oldest = 0; + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + RWLOCK(&zmgr->urlock, isc_rwlocktype_write); + for (i = 0; i < UNREACH_CHACHE_SIZE; i++) { + /* Existing entry? */ + if (isc_sockaddr_equal(&zmgr->unreachable[i].remote, remote) && + isc_sockaddr_equal(&zmgr->unreachable[i].local, local)) + break; + /* Empty slot? */ + if (zmgr->unreachable[i].expire < seconds) + slot = i; + /* Least recently used slot? */ + if (zmgr->unreachable[i].last < last) { + last = zmgr->unreachable[i].last; + oldest = i; + } + } + if (i < UNREACH_CHACHE_SIZE) { + /* + * Found a existing entry. Update the expire timer and + * last usage timestamps. + */ + zmgr->unreachable[i].expire = seconds + UNREACH_HOLD_TIME; + zmgr->unreachable[i].last = seconds; + if (zmgr->unreachable[i].expire < seconds) + zmgr->unreachable[i].count = 1; + else + zmgr->unreachable[i].count++; + } else if (slot != UNREACH_CHACHE_SIZE) { + /* + * Found a empty slot. Add a new entry to the cache. + */ + zmgr->unreachable[slot].expire = seconds + UNREACH_HOLD_TIME; + zmgr->unreachable[slot].last = seconds; + zmgr->unreachable[slot].remote = *remote; + zmgr->unreachable[slot].local = *local; + zmgr->unreachable[slot].count = 1; + } else { + /* + * Replace the least recently used entry in the cache. + */ + zmgr->unreachable[oldest].expire = seconds + UNREACH_HOLD_TIME; + zmgr->unreachable[oldest].last = seconds; + zmgr->unreachable[oldest].remote = *remote; + zmgr->unreachable[oldest].local = *local; + zmgr->unreachable[oldest].count = 1; + } + RWUNLOCK(&zmgr->urlock, isc_rwlocktype_write); +} + +void +dns_zone_forcereload(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + if (zone->type == dns_zone_master || + (zone->type == dns_zone_redirect && zone->masters == NULL)) + return; + + LOCK_ZONE(zone); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_FORCEXFER); + UNLOCK_ZONE(zone); + dns_zone_refresh(zone); +} + +bool +dns_zone_isforced(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FORCEXFER)); +} + +isc_result_t +dns_zone_setstatistics(dns_zone_t *zone, bool on) { + /* + * This function is obsoleted. + */ + UNUSED(zone); + UNUSED(on); + return (ISC_R_NOTIMPLEMENTED); +} + +uint64_t * +dns_zone_getstatscounters(dns_zone_t *zone) { + /* + * This function is obsoleted. + */ + UNUSED(zone); + return (NULL); +} + +void +dns_zone_setstats(dns_zone_t *zone, isc_stats_t *stats) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(zone->stats == NULL); + + LOCK_ZONE(zone); + zone->stats = NULL; + isc_stats_attach(stats, &zone->stats); + UNLOCK_ZONE(zone); +} + +void +dns_zone_setrequeststats(dns_zone_t *zone, isc_stats_t *stats) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->requeststats_on && stats == NULL) + zone->requeststats_on = false; + else if (!zone->requeststats_on && stats != NULL) { + if (zone->requeststats == NULL) { + isc_stats_attach(stats, &zone->requeststats); + zone->requeststats_on = true; + } + } + UNLOCK_ZONE(zone); +} + +void +dns_zone_setrcvquerystats(dns_zone_t *zone, dns_stats_t *stats) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + if (zone->requeststats_on && stats != NULL) { + if (zone->rcvquerystats == NULL) { + dns_stats_attach(stats, &zone->rcvquerystats); + zone->requeststats_on = true; + } + } + UNLOCK_ZONE(zone); +} + +isc_stats_t * +dns_zone_getrequeststats(dns_zone_t *zone) { + /* + * We don't lock zone for efficiency reason. This is not catastrophic + * because requeststats must always be valid when requeststats_on is + * true. + * Some counters may be incremented while requeststats_on is becoming + * false, or some cannot be incremented just after the statistics are + * installed, but it shouldn't matter much in practice. + */ + if (zone->requeststats_on) + return (zone->requeststats); + else + return (NULL); +} + +/* + * Return the received query stats bucket + * see note from dns_zone_getrequeststats() + */ +dns_stats_t * +dns_zone_getrcvquerystats(dns_zone_t *zone) { + if (zone->requeststats_on) + return (zone->rcvquerystats); + else + return (NULL); +} + +void +dns_zone_dialup(dns_zone_t *zone) { + + REQUIRE(DNS_ZONE_VALID(zone)); + + zone_debuglog(zone, "dns_zone_dialup", 3, + "notify = %d, refresh = %d", + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALNOTIFY), + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH)); + + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALNOTIFY)) + dns_zone_notify(zone); + if (zone->type != dns_zone_master && zone->masters != NULL && + DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH)) + dns_zone_refresh(zone); +} + +void +dns_zone_setdialup(dns_zone_t *zone, dns_dialuptype_t dialup) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_DIALNOTIFY | + DNS_ZONEFLG_DIALREFRESH | + DNS_ZONEFLG_NOREFRESH); + switch (dialup) { + case dns_dialuptype_no: + break; + case dns_dialuptype_yes: + DNS_ZONE_SETFLAG(zone, (DNS_ZONEFLG_DIALNOTIFY | + DNS_ZONEFLG_DIALREFRESH | + DNS_ZONEFLG_NOREFRESH)); + break; + case dns_dialuptype_notify: + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DIALNOTIFY); + break; + case dns_dialuptype_notifypassive: + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DIALNOTIFY); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOREFRESH); + break; + case dns_dialuptype_refresh: + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DIALREFRESH); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOREFRESH); + break; + case dns_dialuptype_passive: + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOREFRESH); + break; + default: + INSIST(0); + } + UNLOCK_ZONE(zone); +} + +isc_result_t +dns_zone_setkeydirectory(dns_zone_t *zone, const char *directory) { + isc_result_t result = ISC_R_SUCCESS; + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + result = dns_zone_setstring(zone, &zone->keydirectory, directory); + UNLOCK_ZONE(zone); + + return (result); +} + +const char * +dns_zone_getkeydirectory(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->keydirectory); +} + +unsigned int +dns_zonemgr_getcount(dns_zonemgr_t *zmgr, int state) { + dns_zone_t *zone; + unsigned int count = 0; + + REQUIRE(DNS_ZONEMGR_VALID(zmgr)); + + RWLOCK(&zmgr->rwlock, isc_rwlocktype_read); + switch (state) { + case DNS_ZONESTATE_XFERRUNNING: + for (zone = ISC_LIST_HEAD(zmgr->xfrin_in_progress); + zone != NULL; + zone = ISC_LIST_NEXT(zone, statelink)) + count++; + break; + case DNS_ZONESTATE_XFERDEFERRED: + for (zone = ISC_LIST_HEAD(zmgr->waiting_for_xfrin); + zone != NULL; + zone = ISC_LIST_NEXT(zone, statelink)) + count++; + break; + case DNS_ZONESTATE_SOAQUERY: + for (zone = ISC_LIST_HEAD(zmgr->zones); + zone != NULL; + zone = ISC_LIST_NEXT(zone, link)) + if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESH)) + count++; + break; + case DNS_ZONESTATE_ANY: + for (zone = ISC_LIST_HEAD(zmgr->zones); + zone != NULL; + zone = ISC_LIST_NEXT(zone, link)) { + dns_view_t *view = zone->view; + if (view != NULL && strcmp(view->name, "_bind") == 0) + continue; + count++; + } + break; + case DNS_ZONESTATE_AUTOMATIC: + for (zone = ISC_LIST_HEAD(zmgr->zones); + zone != NULL; + zone = ISC_LIST_NEXT(zone, link)) { + dns_view_t *view = zone->view; + if (view != NULL && strcmp(view->name, "_bind") == 0) + continue; + if (zone->automatic) + count++; + } + break; + default: + INSIST(0); + } + + RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_read); + + return (count); +} + +isc_result_t +dns_zone_checknames(dns_zone_t *zone, dns_name_t *name, dns_rdata_t *rdata) { + bool ok = true; + bool fail = false; + char namebuf[DNS_NAME_FORMATSIZE]; + char namebuf2[DNS_NAME_FORMATSIZE]; + char typebuf[DNS_RDATATYPE_FORMATSIZE]; + int level = ISC_LOG_WARNING; + dns_name_t bad; + + REQUIRE(DNS_ZONE_VALID(zone)); + + if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNAMES) && + rdata->type != dns_rdatatype_nsec3) + return (ISC_R_SUCCESS); + + if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNAMESFAIL) || + rdata->type == dns_rdatatype_nsec3) { + level = ISC_LOG_ERROR; + fail = true; + } + + ok = dns_rdata_checkowner(name, rdata->rdclass, rdata->type, true); + if (!ok) { + dns_name_format(name, namebuf, sizeof(namebuf)); + dns_rdatatype_format(rdata->type, typebuf, sizeof(typebuf)); + dns_zone_log(zone, level, "%s/%s: %s", namebuf, typebuf, + dns_result_totext(DNS_R_BADOWNERNAME)); + if (fail) + return (DNS_R_BADOWNERNAME); + } + + dns_name_init(&bad, NULL); + ok = dns_rdata_checknames(rdata, name, &bad); + if (!ok) { + dns_name_format(name, namebuf, sizeof(namebuf)); + dns_name_format(&bad, namebuf2, sizeof(namebuf2)); + dns_rdatatype_format(rdata->type, typebuf, sizeof(typebuf)); + dns_zone_log(zone, level, "%s/%s: %s: %s ", namebuf, typebuf, + namebuf2, dns_result_totext(DNS_R_BADNAME)); + if (fail) + return (DNS_R_BADNAME); + } + + return (ISC_R_SUCCESS); +} + +void +dns_zone_setcheckmx(dns_zone_t *zone, dns_checkmxfunc_t checkmx) { + REQUIRE(DNS_ZONE_VALID(zone)); + zone->checkmx = checkmx; +} + +void +dns_zone_setchecksrv(dns_zone_t *zone, dns_checksrvfunc_t checksrv) { + REQUIRE(DNS_ZONE_VALID(zone)); + zone->checksrv = checksrv; +} + +void +dns_zone_setcheckns(dns_zone_t *zone, dns_checknsfunc_t checkns) { + REQUIRE(DNS_ZONE_VALID(zone)); + zone->checkns = checkns; +} + +void +dns_zone_setisself(dns_zone_t *zone, dns_isselffunc_t isself, void *arg) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->isself = isself; + zone->isselfarg = arg; + UNLOCK_ZONE(zone); +} + +void +dns_zone_setnotifydelay(dns_zone_t *zone, uint32_t delay) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->notifydelay = delay; + UNLOCK_ZONE(zone); +} + +uint32_t +dns_zone_getnotifydelay(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->notifydelay); +} + +isc_result_t +dns_zone_signwithkey(dns_zone_t *zone, dns_secalg_t algorithm, + uint16_t keyid, bool deleteit) +{ + isc_result_t result; + REQUIRE(DNS_ZONE_VALID(zone)); + + dns_zone_log(zone, ISC_LOG_NOTICE, + "dns_zone_signwithkey(algorithm=%u, keyid=%u)", + algorithm, keyid); + LOCK_ZONE(zone); + result = zone_signwithkey(zone, algorithm, keyid, deleteit); + UNLOCK_ZONE(zone); + + return (result); +} + +/* + * Called when a dynamic update for an NSEC3PARAM record is received. + * + * If set, transform the NSEC3 salt into human-readable form so that it can be + * logged. Then call zone_addnsec3chain(), passing NSEC3PARAM RDATA to it. + */ +isc_result_t +dns_zone_addnsec3chain(dns_zone_t *zone, dns_rdata_nsec3param_t *nsec3param) { + isc_result_t result; + char salt[255*2+1]; + + REQUIRE(DNS_ZONE_VALID(zone)); + + result = dns_nsec3param_salttotext(nsec3param, salt, sizeof(salt)); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + dns_zone_log(zone, ISC_LOG_NOTICE, + "dns_zone_addnsec3chain(hash=%u, iterations=%u, salt=%s)", + nsec3param->hash, nsec3param->iterations, + salt); + LOCK_ZONE(zone); + result = zone_addnsec3chain(zone, nsec3param); + UNLOCK_ZONE(zone); + + return (result); +} + +void +dns_zone_setnodes(dns_zone_t *zone, uint32_t nodes) { + REQUIRE(DNS_ZONE_VALID(zone)); + + if (nodes == 0) + nodes = 1; + zone->nodes = nodes; +} + +void +dns_zone_setsignatures(dns_zone_t *zone, uint32_t signatures) { + REQUIRE(DNS_ZONE_VALID(zone)); + + /* + * We treat signatures as a signed value so explicitly + * limit its range here. + */ + if (signatures > INT32_MAX) + signatures = INT32_MAX; + else if (signatures == 0) + signatures = 1; + zone->signatures = signatures; +} + +uint32_t +dns_zone_getsignatures(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->signatures); +} + +void +dns_zone_setprivatetype(dns_zone_t *zone, dns_rdatatype_t type) { + REQUIRE(DNS_ZONE_VALID(zone)); + zone->privatetype = type; +} + +dns_rdatatype_t +dns_zone_getprivatetype(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->privatetype); +} + +static isc_result_t +zone_signwithkey(dns_zone_t *zone, dns_secalg_t algorithm, uint16_t keyid, + bool deleteit) +{ + dns_signing_t *signing; + dns_signing_t *current; + isc_result_t result = ISC_R_SUCCESS; + isc_time_t now; + dns_db_t *db = NULL; + + signing = isc_mem_get(zone->mctx, sizeof *signing); + if (signing == NULL) + return (ISC_R_NOMEMORY); + + signing->magic = 0; + signing->db = NULL; + signing->dbiterator = NULL; + signing->algorithm = algorithm; + signing->keyid = keyid; + signing->deleteit = deleteit; + signing->done = false; + + TIME_NOW(&now); + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) + dns_db_attach(zone->db, &db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + + if (db == NULL) { + result = ISC_R_NOTFOUND; + goto cleanup; + } + + dns_db_attach(db, &signing->db); + + for (current = ISC_LIST_HEAD(zone->signing); + current != NULL; + current = ISC_LIST_NEXT(current, link)) { + if (current->db == signing->db && + current->algorithm == signing->algorithm && + current->keyid == signing->keyid) { + if (current->deleteit != signing->deleteit) + current->done = true; + else + goto cleanup; + } + } + + result = dns_db_createiterator(signing->db, 0, + &signing->dbiterator); + + if (result == ISC_R_SUCCESS) + result = dns_dbiterator_first(signing->dbiterator); + if (result == ISC_R_SUCCESS) { + dns_dbiterator_pause(signing->dbiterator); + ISC_LIST_INITANDAPPEND(zone->signing, signing, link); + signing = NULL; + if (isc_time_isepoch(&zone->signingtime)) { + zone->signingtime = now; + if (zone->task != NULL) + zone_settimer(zone, &now); + } + } + + cleanup: + if (signing != NULL) { + if (signing->db != NULL) + dns_db_detach(&signing->db); + if (signing->dbiterator != NULL) + dns_dbiterator_destroy(&signing->dbiterator); + isc_mem_put(zone->mctx, signing, sizeof *signing); + } + if (db != NULL) + dns_db_detach(&db); + return (result); +} + +static void +logmsg(const char *format, ...) { + va_list args; + va_start(args, format); + isc_log_vwrite(dns_lctx, DNS_LOGCATEGORY_GENERAL, DNS_LOGMODULE_ZONE, + ISC_LOG_DEBUG(1), format, args); + va_end(args); +} + +static void +clear_keylist(dns_dnsseckeylist_t *list, isc_mem_t *mctx) { + dns_dnsseckey_t *key; + while (!ISC_LIST_EMPTY(*list)) { + key = ISC_LIST_HEAD(*list); + ISC_LIST_UNLINK(*list, key, link); + dns_dnsseckey_destroy(mctx, &key); + } +} + +/* Called once; *timep should be set to the current time. */ +static isc_result_t +next_keyevent(dst_key_t *key, isc_stdtime_t *timep) { + isc_result_t result; + isc_stdtime_t now, then = 0, event; + int i; + + now = *timep; + + for (i = 0; i <= DST_MAX_TIMES; i++) { + result = dst_key_gettime(key, i, &event); + if (result == ISC_R_SUCCESS && event > now && + (then == 0 || event < then)) + then = event; + } + + if (then != 0) { + *timep = then; + return (ISC_R_SUCCESS); + } + + return (ISC_R_NOTFOUND); +} + +static isc_result_t +rr_exists(dns_db_t *db, dns_dbversion_t *ver, dns_name_t *name, + const dns_rdata_t *rdata, bool *flag) +{ + dns_rdataset_t rdataset; + dns_dbnode_t *node = NULL; + isc_result_t result; + + dns_rdataset_init(&rdataset); + if (rdata->type == dns_rdatatype_nsec3) + CHECK(dns_db_findnsec3node(db, name, false, &node)); + else + CHECK(dns_db_findnode(db, name, false, &node)); + result = dns_db_findrdataset(db, node, ver, rdata->type, 0, + (isc_stdtime_t) 0, &rdataset, NULL); + if (result == ISC_R_NOTFOUND) { + *flag = false; + result = ISC_R_SUCCESS; + goto failure; + } + + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) { + dns_rdata_t myrdata = DNS_RDATA_INIT; + dns_rdataset_current(&rdataset, &myrdata); + if (!dns_rdata_compare(&myrdata, rdata)) + break; + } + dns_rdataset_disassociate(&rdataset); + if (result == ISC_R_SUCCESS) { + *flag = true; + } else if (result == ISC_R_NOMORE) { + *flag = false; + result = ISC_R_SUCCESS; + } + + failure: + if (node != NULL) + dns_db_detachnode(db, &node); + return (result); +} + +/* + * Add records to signal the state of signing or of key removal. + */ +static isc_result_t +add_signing_records(dns_db_t *db, dns_rdatatype_t privatetype, + dns_dbversion_t *ver, dns_diff_t *diff, + bool sign_all) +{ + dns_difftuple_t *tuple, *newtuple = NULL; + dns_rdata_dnskey_t dnskey; + dns_rdata_t rdata = DNS_RDATA_INIT; + bool flag; + isc_region_t r; + isc_result_t result = ISC_R_SUCCESS; + uint16_t keyid; + unsigned char buf[5]; + dns_name_t *name = dns_db_origin(db); + + for (tuple = ISC_LIST_HEAD(diff->tuples); + tuple != NULL; + tuple = ISC_LIST_NEXT(tuple, link)) { + if (tuple->rdata.type != dns_rdatatype_dnskey) + continue; + + result = dns_rdata_tostruct(&tuple->rdata, &dnskey, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + if ((dnskey.flags & + (DNS_KEYFLAG_OWNERMASK|DNS_KEYTYPE_NOAUTH)) + != DNS_KEYOWNER_ZONE) + continue; + + dns_rdata_toregion(&tuple->rdata, &r); + + keyid = dst_region_computeid(&r, dnskey.algorithm); + + buf[0] = dnskey.algorithm; + buf[1] = (keyid & 0xff00) >> 8; + buf[2] = (keyid & 0xff); + buf[3] = (tuple->op == DNS_DIFFOP_ADD) ? 0 : 1; + buf[4] = 0; + rdata.data = buf; + rdata.length = sizeof(buf); + rdata.type = privatetype; + rdata.rdclass = tuple->rdata.rdclass; + + if (sign_all || tuple->op == DNS_DIFFOP_DEL) { + CHECK(rr_exists(db, ver, name, &rdata, &flag)); + if (flag) + continue; + CHECK(dns_difftuple_create(diff->mctx, DNS_DIFFOP_ADD, + name, 0, &rdata, &newtuple)); + CHECK(do_one_tuple(&newtuple, db, ver, diff)); + INSIST(newtuple == NULL); + } + + /* + * Remove any record which says this operation has already + * completed. + */ + buf[4] = 1; + CHECK(rr_exists(db, ver, name, &rdata, &flag)); + if (flag) { + CHECK(dns_difftuple_create(diff->mctx, DNS_DIFFOP_DEL, + name, 0, &rdata, &newtuple)); + CHECK(do_one_tuple(&newtuple, db, ver, diff)); + INSIST(newtuple == NULL); + } + } + failure: + return (result); +} + +static isc_result_t +sign_apex(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver, + isc_stdtime_t now, dns_diff_t *diff, dns__zonediff_t *zonediff) +{ + isc_result_t result; + isc_stdtime_t inception, soaexpire; + bool check_ksk, keyset_kskonly; + dst_key_t *zone_keys[DNS_MAXZONEKEYS]; + unsigned int nkeys = 0, i; + dns_difftuple_t *tuple; + + result = dns__zone_findkeys(zone, db, ver, now, zone->mctx, + DNS_MAXZONEKEYS, zone_keys, &nkeys); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "sign_apex:dns__zone_findkeys -> %s", + dns_result_totext(result)); + return (result); + } + + inception = now - 3600; /* Allow for clock skew. */ + soaexpire = now + dns_zone_getsigvalidityinterval(zone); + + check_ksk = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_UPDATECHECKKSK); + keyset_kskonly = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_DNSKEYKSKONLY); + + /* + * See if dns__zone_updatesigs() will update DNSKEY signature and if + * not cause them to sign so that newly activated keys are used. + */ + for (tuple = ISC_LIST_HEAD(diff->tuples); + tuple != NULL; + tuple = ISC_LIST_NEXT(tuple, link)) { + if (tuple->rdata.type == dns_rdatatype_dnskey && + dns_name_equal(&tuple->name, &zone->origin)) + break; + } + + if (tuple == NULL) { + result = del_sigs(zone, db, ver, &zone->origin, + dns_rdatatype_dnskey, zonediff, + zone_keys, nkeys, now, false); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "sign_apex:del_sigs -> %s", + dns_result_totext(result)); + goto failure; + } + result = add_sigs(db, ver, &zone->origin, dns_rdatatype_dnskey, + zonediff->diff, zone_keys, nkeys, zone->mctx, + inception, soaexpire, check_ksk, + keyset_kskonly); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "sign_apex:add_sigs -> %s", + dns_result_totext(result)); + goto failure; + } + } + + result = dns__zone_updatesigs(diff, db, ver, zone_keys, nkeys, zone, + inception, soaexpire, now, check_ksk, + keyset_kskonly, zonediff); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "sign_apex:dns__zone_updatesigs -> %s", + dns_result_totext(result)); + goto failure; + } + + failure: + for (i = 0; i < nkeys; i++) + dst_key_free(&zone_keys[i]); + return (result); +} + +/* + * Prevent the zone entering a inconsistent state where + * NSEC only DNSKEYs are present with NSEC3 chains. + * See update.c:check_dnssec() + */ +static bool +dnskey_sane(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver, + dns_diff_t *diff) +{ + isc_result_t result; + dns_difftuple_t *tuple; + bool nseconly = false, nsec3 = false; + dns_rdatatype_t privatetype = dns_zone_getprivatetype(zone); + + /* Scan the tuples for an NSEC-only DNSKEY */ + for (tuple = ISC_LIST_HEAD(diff->tuples); + tuple != NULL; + tuple = ISC_LIST_NEXT(tuple, link)) { + uint8_t alg; + if (tuple->rdata.type != dns_rdatatype_dnskey || + tuple->op != DNS_DIFFOP_ADD) + continue; + + alg = tuple->rdata.data[3]; + if (alg == DST_ALG_RSAMD5 || alg == DST_ALG_RSASHA1 || + alg == DST_ALG_DSA || alg == DST_ALG_ECC) { + nseconly = true; + break; + } + } + + /* Check existing DB for NSEC-only DNSKEY */ + if (!nseconly) { + result = dns_nsec_nseconly(db, ver, &nseconly); + if (result == ISC_R_NOTFOUND) + result = ISC_R_SUCCESS; + CHECK(result); + } + + /* Check existing DB for NSEC3 */ + if (!nsec3) + CHECK(dns_nsec3_activex(db, ver, false, + privatetype, &nsec3)); + + /* Refuse to allow NSEC3 with NSEC-only keys */ + if (nseconly && nsec3) { + dns_zone_log(zone, ISC_LOG_ERROR, + "NSEC only DNSKEYs and NSEC3 chains not allowed"); + goto failure; + } + + return (true); + + failure: + return (false); +} + +static isc_result_t +clean_nsec3param(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver, + dns_diff_t *diff) +{ + isc_result_t result; + dns_dbnode_t *node = NULL; + dns_rdataset_t rdataset; + + dns_rdataset_init(&rdataset); + CHECK(dns_db_getoriginnode(db, &node)); + + result = dns_db_findrdataset(db, node, ver, dns_rdatatype_dnskey, + dns_rdatatype_none, 0, &rdataset, NULL); + if (dns_rdataset_isassociated(&rdataset)) + dns_rdataset_disassociate(&rdataset); + if (result != ISC_R_NOTFOUND) + goto failure; + + result = dns_nsec3param_deletechains(db, ver, zone, true, diff); + + failure: + if (node != NULL) + dns_db_detachnode(db, &node); + return (result); +} + +/* + * Given an RRSIG rdataset and an algorithm, determine whether there + * are any signatures using that algorithm. + */ +static bool +signed_with_alg(dns_rdataset_t *rdataset, dns_secalg_t alg) { + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdata_rrsig_t rrsig; + isc_result_t result; + + REQUIRE(rdataset == NULL || rdataset->type == dns_rdatatype_rrsig); + if (rdataset == NULL || !dns_rdataset_isassociated(rdataset)) { + return (false); + } + + for (result = dns_rdataset_first(rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(rdataset)) + { + dns_rdataset_current(rdataset, &rdata); + result = dns_rdata_tostruct(&rdata, &rrsig, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + dns_rdata_reset(&rdata); + if (rrsig.algorithm == alg) + return (true); + } + + return (false); +} + +static isc_result_t +add_chains(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver, + dns_diff_t *diff) +{ + dns_name_t *origin; + bool build_nsec3; + isc_result_t result; + + origin = dns_db_origin(db); + CHECK(dns_private_chains(db, ver, zone->privatetype, NULL, + &build_nsec3)); + if (build_nsec3) + CHECK(dns_nsec3_addnsec3sx(db, ver, origin, zone->minimum, + false, zone->privatetype, diff)); + CHECK(updatesecure(db, ver, origin, zone->minimum, true, diff)); + + failure: + return (result); +} + +static void +zone_rekey(dns_zone_t *zone) { + isc_result_t result; + dns_db_t *db = NULL; + dns_dbnode_t *node = NULL; + dns_dbversion_t *ver = NULL; + dns_rdataset_t cdsset, soaset, soasigs, keyset, keysigs, cdnskeyset; + dns_dnsseckeylist_t dnskeys, keys, rmkeys; + dns_dnsseckey_t *key; + dns_diff_t diff, _sig_diff; + dns__zonediff_t zonediff; + bool commit = false, newactive = false; + bool newalg = false; + bool fullsign; + dns_ttl_t ttl = 3600; + const char *dir; + isc_mem_t *mctx; + isc_stdtime_t now; + isc_time_t timenow; + isc_interval_t ival; + char timebuf[80]; + + REQUIRE(DNS_ZONE_VALID(zone)); + + ISC_LIST_INIT(dnskeys); + ISC_LIST_INIT(keys); + ISC_LIST_INIT(rmkeys); + dns_rdataset_init(&soaset); + dns_rdataset_init(&soasigs); + dns_rdataset_init(&keyset); + dns_rdataset_init(&keysigs); + dns_rdataset_init(&cdsset); + dns_rdataset_init(&cdnskeyset); + dir = dns_zone_getkeydirectory(zone); + mctx = zone->mctx; + dns_diff_init(mctx, &diff); + dns_diff_init(mctx, &_sig_diff); + zonediff_init(&zonediff, &_sig_diff); + + CHECK(dns_zone_getdb(zone, &db)); + CHECK(dns_db_newversion(db, &ver)); + CHECK(dns_db_getoriginnode(db, &node)); + + TIME_NOW(&timenow); + now = isc_time_seconds(&timenow); + + dns_zone_log(zone, ISC_LOG_INFO, "reconfiguring zone keys"); + + /* Get the SOA record's TTL */ + CHECK(dns_db_findrdataset(db, node, ver, dns_rdatatype_soa, + dns_rdatatype_none, 0, &soaset, &soasigs)); + ttl = soaset.ttl; + dns_rdataset_disassociate(&soaset); + + /* Get the DNSKEY rdataset */ + result = dns_db_findrdataset(db, node, ver, dns_rdatatype_dnskey, + dns_rdatatype_none, 0, &keyset, &keysigs); + if (result == ISC_R_SUCCESS) { + ttl = keyset.ttl; + CHECK(dns_dnssec_keylistfromrdataset(&zone->origin, dir, + mctx, &keyset, + &keysigs, &soasigs, + false, false, + &dnskeys)); + } else if (result != ISC_R_NOTFOUND) + goto failure; + + + /* Get the CDS rdataset */ + result = dns_db_findrdataset(db, node, ver, dns_rdatatype_cds, + dns_rdatatype_none, 0, &cdsset, NULL); + if (result != ISC_R_SUCCESS && dns_rdataset_isassociated(&cdsset)) + dns_rdataset_disassociate(&cdsset); + + /* Get the CDNSKEY rdataset */ + result = dns_db_findrdataset(db, node, ver, dns_rdatatype_cdnskey, + dns_rdatatype_none, 0, &cdnskeyset, NULL); + if (result != ISC_R_SUCCESS && dns_rdataset_isassociated(&cdnskeyset)) + dns_rdataset_disassociate(&cdnskeyset); + + /* + * True when called from "rndc sign". Indicates the zone should be + * fully signed now. + */ + fullsign = DNS_ZONEKEY_OPTION(zone, DNS_ZONEKEY_FULLSIGN); + + result = dns_dnssec_findmatchingkeys2(&zone->origin, dir, now, mctx, + &keys); + if (result == ISC_R_SUCCESS) { + bool check_ksk; + check_ksk = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_UPDATECHECKKSK); + + result = dns_dnssec_updatekeys(&dnskeys, &keys, &rmkeys, + &zone->origin, ttl, &diff, + !check_ksk, + mctx, logmsg); + /* + * Keys couldn't be updated for some reason; + * try again later. + */ + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, "zone_rekey:" + "couldn't update zone keys: %s", + isc_result_totext(result)); + goto failure; + } + + /* + * Update CDS / CDNSKEY records. + */ + result = dns_dnssec_syncupdate(&dnskeys, &rmkeys, &cdsset, + &cdnskeyset, now, ttl, + &diff, mctx); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, "zone_rekey:" + "couldn't update CDS/CDNSKEY: %s", + isc_result_totext(result)); + goto failure; + } + + /* + * See if any pre-existing keys have newly become active; + * also, see if any new key is for a new algorithm, as in that + * event, we need to sign the zone fully. (If there's a new + * key, but it's for an already-existing algorithm, then + * the zone signing can be handled incrementally.) + */ + for (key = ISC_LIST_HEAD(dnskeys); + key != NULL; + key = ISC_LIST_NEXT(key, link)) { + if (!key->first_sign) + continue; + + newactive = true; + + if (!dns_rdataset_isassociated(&keysigs)) { + newalg = true; + break; + } + + if (signed_with_alg(&keysigs, dst_key_alg(key->key))) { + /* + * This isn't a new algorithm; clear + * first_sign so we won't sign the + * whole zone with this key later + */ + key->first_sign = false; + } else { + newalg = true; + break; + } + } + + if ((newactive || fullsign || !ISC_LIST_EMPTY(diff.tuples)) && + dnskey_sane(zone, db, ver, &diff)) { + CHECK(dns_diff_apply(&diff, db, ver)); + CHECK(clean_nsec3param(zone, db, ver, &diff)); + CHECK(add_signing_records(db, zone->privatetype, + ver, &diff, + (newalg || fullsign))); + CHECK(update_soa_serial(db, ver, &diff, mctx, + zone->updatemethod)); + CHECK(add_chains(zone, db, ver, &diff)); + CHECK(sign_apex(zone, db, ver, now, &diff, &zonediff)); + CHECK(zone_journal(zone, zonediff.diff, NULL, + "zone_rekey")); + commit = true; + } + } + + dns_db_closeversion(db, &ver, true); + + if (commit) { + dns_difftuple_t *tuple; + + LOCK_ZONE(zone); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY); + + zone_needdump(zone, DNS_DUMP_DELAY); + + zone_settimer(zone, &timenow); + + /* Remove any signatures from removed keys. */ + if (!ISC_LIST_EMPTY(rmkeys)) { + for (key = ISC_LIST_HEAD(rmkeys); + key != NULL; + key = ISC_LIST_NEXT(key, link)) { + result = zone_signwithkey(zone, + dst_key_alg(key->key), + dst_key_id(key->key), + true); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_signwithkey failed: %s", + dns_result_totext(result)); + } + } + } + + if (fullsign) { + /* + * "rndc sign" was called, so we now sign the zone + * with all active keys, whether they're new or not. + */ + for (key = ISC_LIST_HEAD(dnskeys); + key != NULL; + key = ISC_LIST_NEXT(key, link)) { + if (!key->force_sign && !key->hint_sign) + continue; + + result = zone_signwithkey(zone, + dst_key_alg(key->key), + dst_key_id(key->key), + false); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_signwithkey failed: %s", + dns_result_totext(result)); + } + } + } else if (newalg) { + /* + * We haven't been told to sign fully, but a new + * algorithm was added to the DNSKEY. We sign + * the full zone, but only with newly active + * keys. + */ + for (key = ISC_LIST_HEAD(dnskeys); + key != NULL; + key = ISC_LIST_NEXT(key, link)) { + if (!key->first_sign) + continue; + + result = zone_signwithkey(zone, + dst_key_alg(key->key), + dst_key_id(key->key), + false); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_signwithkey failed: %s", + dns_result_totext(result)); + } + } + } + + /* + * Clear fullsign flag, if it was set, so we don't do + * another full signing next time + */ + zone->keyopts &= ~DNS_ZONEKEY_FULLSIGN; + + /* + * Cause the zone to add/delete NSEC3 chains for the + * deferred NSEC3PARAM changes. + */ + for (tuple = ISC_LIST_HEAD(zonediff.diff->tuples); + tuple != NULL; + tuple = ISC_LIST_NEXT(tuple, link)) { + unsigned char buf[DNS_NSEC3PARAM_BUFFERSIZE]; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdata_nsec3param_t nsec3param; + + if (tuple->rdata.type != zone->privatetype || + tuple->op != DNS_DIFFOP_ADD) + continue; + + if (!dns_nsec3param_fromprivate(&tuple->rdata, &rdata, + buf, sizeof(buf))) + continue; + result = dns_rdata_tostruct(&rdata, &nsec3param, NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + if (nsec3param.flags == 0) + continue; + + result = zone_addnsec3chain(zone, &nsec3param); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "zone_addnsec3chain failed: %s", + dns_result_totext(result)); + } + } + + /* + * Activate any NSEC3 chain updates that may have + * been scheduled before this rekey. + */ + if (fullsign || newalg) + resume_addnsec3chain(zone); + + /* + * Schedule the next resigning event + */ + set_resigntime(zone); + UNLOCK_ZONE(zone); + } + + isc_time_settoepoch(&zone->refreshkeytime); + + /* + * If we're doing key maintenance, set the key refresh timer to + * the next scheduled key event or to 'dnssec-loadkeys-interval' + * seconds in the future, whichever is sooner. + */ + if (DNS_ZONEKEY_OPTION(zone, DNS_ZONEKEY_MAINTAIN)) { + isc_time_t timethen; + isc_stdtime_t then; + + LOCK_ZONE(zone); + DNS_ZONE_TIME_ADD(&timenow, zone->refreshkeyinterval, + &timethen); + zone->refreshkeytime = timethen; + UNLOCK_ZONE(zone); + + for (key = ISC_LIST_HEAD(dnskeys); + key != NULL; + key = ISC_LIST_NEXT(key, link)) { + then = now; + result = next_keyevent(key->key, &then); + if (result != ISC_R_SUCCESS) + continue; + + DNS_ZONE_TIME_ADD(&timenow, then - now, &timethen); + LOCK_ZONE(zone); + if (isc_time_compare(&timethen, + &zone->refreshkeytime) < 0) { + zone->refreshkeytime = timethen; + } + UNLOCK_ZONE(zone); + } + + zone_settimer(zone, &timenow); + + isc_time_formattimestamp(&zone->refreshkeytime, timebuf, 80); + dns_zone_log(zone, ISC_LOG_INFO, "next key event: %s", timebuf); + } + + done: + dns_diff_clear(&diff); + dns_diff_clear(&_sig_diff); + + clear_keylist(&dnskeys, mctx); + clear_keylist(&keys, mctx); + clear_keylist(&rmkeys, mctx); + + if (ver != NULL) + dns_db_closeversion(db, &ver, false); + if (dns_rdataset_isassociated(&cdsset)) + dns_rdataset_disassociate(&cdsset); + if (dns_rdataset_isassociated(&keyset)) + dns_rdataset_disassociate(&keyset); + if (dns_rdataset_isassociated(&keysigs)) + dns_rdataset_disassociate(&keysigs); + if (dns_rdataset_isassociated(&soasigs)) + dns_rdataset_disassociate(&soasigs); + if (dns_rdataset_isassociated(&cdnskeyset)) + dns_rdataset_disassociate(&cdnskeyset); + if (node != NULL) + dns_db_detachnode(db, &node); + if (db != NULL) + dns_db_detach(&db); + + INSIST(ver == NULL); + return; + + failure: + /* + * Something went wrong; try again in ten minutes or + * after a key refresh interval, whichever is shorter. + */ + isc_interval_set(&ival, ISC_MIN(zone->refreshkeyinterval, 600), 0); + isc_time_nowplusinterval(&zone->refreshkeytime, &ival); + goto done; +} + +void +dns_zone_rekey(dns_zone_t *zone, bool fullsign) { + isc_time_t now; + + if (zone->type == dns_zone_master && zone->task != NULL) { + LOCK_ZONE(zone); + + if (fullsign) + zone->keyopts |= DNS_ZONEKEY_FULLSIGN; + + TIME_NOW(&now); + zone->refreshkeytime = now; + zone_settimer(zone, &now); + + UNLOCK_ZONE(zone); + } +} + +isc_result_t +dns_zone_nscheck(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *version, + unsigned int *errors) +{ + isc_result_t result; + dns_dbnode_t *node = NULL; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(errors != NULL); + + result = dns_db_getoriginnode(db, &node); + if (result != ISC_R_SUCCESS) + return (result); + result = zone_count_ns_rr(zone, db, node, version, NULL, errors, + false); + dns_db_detachnode(db, &node); + return (result); +} + +isc_result_t +dns_zone_cdscheck(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *version) { + isc_result_t result; + dns_dbnode_t *node = NULL; + dns_rdataset_t dnskey, cds, cdnskey; + unsigned char buffer[DNS_DS_BUFFERSIZE]; + unsigned char algorithms[256]; + unsigned int i; + + REQUIRE(DNS_ZONE_VALID(zone)); + + result = dns_db_getoriginnode(db, &node); + if (result != ISC_R_SUCCESS) + return (result); + + dns_rdataset_init(&cds); + dns_rdataset_init(&dnskey); + dns_rdataset_init(&cdnskey); + + result = dns_db_findrdataset(db, node, version, dns_rdatatype_cds, + dns_rdatatype_none, 0, &cds, NULL); + if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) + goto failure; + + result = dns_db_findrdataset(db, node, version, dns_rdatatype_cdnskey, + dns_rdatatype_none, 0, &cdnskey, NULL); + if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) + goto failure; + + if (!dns_rdataset_isassociated(&cds) && + !dns_rdataset_isassociated(&cdnskey)) { + result = ISC_R_SUCCESS; + goto failure; + } + + result = dns_db_findrdataset(db, node, version, dns_rdatatype_dnskey, + dns_rdatatype_none, 0, &dnskey, NULL); + if (result == ISC_R_NOTFOUND) { + if (dns_rdataset_isassociated(&cds)) + result = DNS_R_BADCDS; + else + result = DNS_R_BADCDNSKEY; + goto failure; + } + if (result != ISC_R_SUCCESS) + goto failure; + + /* + * For each DNSSEC algorithm in the CDS RRset there must be + * a matching DNSKEY record. + */ + if (dns_rdataset_isassociated(&cds)) { + memset(algorithms, 0, sizeof(algorithms)); + for (result = dns_rdataset_first(&cds); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&cds)) { + dns_rdata_t crdata = DNS_RDATA_INIT; + dns_rdata_cds_t structcds; + + dns_rdataset_current(&cds, &crdata); + CHECK(dns_rdata_tostruct(&crdata, &structcds, NULL)); + if (algorithms[structcds.algorithm] == 0) + algorithms[structcds.algorithm] = 1; + for (result = dns_rdataset_first(&dnskey); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&dnskey)) { + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdata_t dsrdata = DNS_RDATA_INIT; + + dns_rdataset_current(&dnskey, &rdata); + CHECK(dns_ds_buildrdata(&zone->origin, &rdata, + structcds.digest_type, + buffer, &dsrdata)); + if (crdata.length == dsrdata.length && + memcmp(crdata.data, dsrdata.data, + dsrdata.length) == 0) { + algorithms[structcds.algorithm] = 2; + } + } + if (result != ISC_R_NOMORE) + goto failure; + } + for (i = 0; i < sizeof(algorithms); i++) { + if (algorithms[i] == 1) { + result = DNS_R_BADCDNSKEY; + goto failure; + } + } + } + + /* + * For each DNSSEC algorithm in the CDNSKEY RRset there must be + * a matching DNSKEY record. + */ + if (dns_rdataset_isassociated(&cdnskey)) { + memset(algorithms, 0, sizeof(algorithms)); + for (result = dns_rdataset_first(&cdnskey); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&cdnskey)) { + dns_rdata_t crdata = DNS_RDATA_INIT; + dns_rdata_cdnskey_t structcdnskey; + + dns_rdataset_current(&cdnskey, &crdata); + CHECK(dns_rdata_tostruct(&crdata, &structcdnskey, + NULL)); + if (algorithms[structcdnskey.algorithm] == 0) + algorithms[structcdnskey.algorithm] = 1; + for (result = dns_rdataset_first(&dnskey); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&dnskey)) { + dns_rdata_t rdata = DNS_RDATA_INIT; + + dns_rdataset_current(&dnskey, &rdata); + if (crdata.length == rdata.length && + memcmp(crdata.data, rdata.data, + rdata.length) == 0) { + algorithms[structcdnskey.algorithm] = 2; + } + } + if (result != ISC_R_NOMORE) + goto failure; + } + for (i = 0; i < sizeof(algorithms); i++) { + if (algorithms[i] == 1) { + result = DNS_R_BADCDS; + goto failure; + } + } + } + result = ISC_R_SUCCESS; + + failure: + if (dns_rdataset_isassociated(&cds)) + dns_rdataset_disassociate(&cds); + if (dns_rdataset_isassociated(&dnskey)) + dns_rdataset_disassociate(&dnskey); + if (dns_rdataset_isassociated(&cdnskey)) + dns_rdataset_disassociate(&cdnskey); + dns_db_detachnode(db, &node); + return (result); +} + +void +dns_zone_setautomatic(dns_zone_t *zone, bool automatic) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->automatic = automatic; + UNLOCK_ZONE(zone); +} + +bool +dns_zone_getautomatic(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->automatic); +} + +void +dns_zone_setadded(dns_zone_t *zone, bool added) { + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + zone->added = added; + UNLOCK_ZONE(zone); +} + +bool +dns_zone_getadded(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->added); +} + +isc_result_t +dns_zone_dlzpostload(dns_zone_t *zone, dns_db_t *db) +{ + isc_time_t loadtime; + isc_result_t result; + dns_zone_t *secure = NULL; + + TIME_NOW(&loadtime); + + /* + * Lock hierarchy: zmgr, zone, raw. + */ + again: + LOCK_ZONE(zone); + INSIST(zone != zone->raw); + if (inline_secure(zone)) + LOCK_ZONE(zone->raw); + else if (inline_raw(zone)) { + secure = zone->secure; + TRYLOCK_ZONE(result, secure); + if (result != ISC_R_SUCCESS) { + UNLOCK_ZONE(zone); + secure = NULL; +#if ISC_PLATFORM_USETHREADS + isc_thread_yield(); +#endif + goto again; + } + } + result = zone_postload(zone, db, loadtime, ISC_R_SUCCESS); + if (inline_secure(zone)) + UNLOCK_ZONE(zone->raw); + else if (secure != NULL) + UNLOCK_ZONE(secure); + UNLOCK_ZONE(zone); + return result; +} + +isc_result_t +dns_zone_setrefreshkeyinterval(dns_zone_t *zone, uint32_t interval) { + REQUIRE(DNS_ZONE_VALID(zone)); + if (interval == 0) + return (ISC_R_RANGE); + /* Maximum value: 24 hours (3600 minutes) */ + if (interval > (24 * 60)) + interval = (24 * 60); + /* Multiply by 60 for seconds */ + zone->refreshkeyinterval = interval * 60; + return (ISC_R_SUCCESS); +} + +void +dns_zone_setrequestixfr(dns_zone_t *zone, bool flag) { + REQUIRE(DNS_ZONE_VALID(zone)); + zone->requestixfr = flag; +} + +bool +dns_zone_getrequestixfr(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->requestixfr); +} + +void +dns_zone_setrequestexpire(dns_zone_t *zone, bool flag) { + REQUIRE(DNS_ZONE_VALID(zone)); + zone->requestexpire = flag; +} + +bool +dns_zone_getrequestexpire(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return (zone->requestexpire); +} + +void +dns_zone_setserialupdatemethod(dns_zone_t *zone, dns_updatemethod_t method) { + REQUIRE(DNS_ZONE_VALID(zone)); + zone->updatemethod = method; +} + +dns_updatemethod_t +dns_zone_getserialupdatemethod(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + return(zone->updatemethod); +} + +/* + * Lock hierarchy: zmgr, zone, raw. + */ +isc_result_t +dns_zone_link(dns_zone_t *zone, dns_zone_t *raw) { + isc_result_t result; + dns_zonemgr_t *zmgr; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(zone->zmgr != NULL); + REQUIRE(zone->task != NULL); + REQUIRE(zone->loadtask != NULL); + REQUIRE(zone->raw == NULL); + + REQUIRE(DNS_ZONE_VALID(raw)); + REQUIRE(raw->zmgr == NULL); + REQUIRE(raw->task == NULL); + REQUIRE(raw->loadtask == NULL); + REQUIRE(raw->secure == NULL); + + REQUIRE(zone != raw); + + /* + * Lock hierarchy: zmgr, zone, raw. + */ + zmgr = zone->zmgr; + RWLOCK(&zmgr->rwlock, isc_rwlocktype_write); + LOCK_ZONE(zone); + LOCK_ZONE(raw); + + result = isc_timer_create(zmgr->timermgr, isc_timertype_inactive, + NULL, NULL, zone->task, zone_timer, raw, + &raw->timer); + if (result != ISC_R_SUCCESS) + goto unlock; + + /* + * The timer "holds" a iref. + */ + raw->irefs++; + INSIST(raw->irefs != 0); + + + /* dns_zone_attach(raw, &zone->raw); */ + isc_refcount_increment(&raw->erefs, NULL); + zone->raw = raw; + + /* dns_zone_iattach(zone, &raw->secure); */ + zone_iattach(zone, &raw->secure); + + isc_task_attach(zone->task, &raw->task); + isc_task_attach(zone->loadtask, &raw->loadtask); + + ISC_LIST_APPEND(zmgr->zones, raw, link); + raw->zmgr = zmgr; + zmgr->refs++; + + unlock: + UNLOCK_ZONE(raw); + UNLOCK_ZONE(zone); + RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write); + return (result); +} + +void +dns_zone_getraw(dns_zone_t *zone, dns_zone_t **raw) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(raw != NULL && *raw == NULL); + + LOCK(&zone->lock); + INSIST(zone != zone->raw); + if (zone->raw != NULL) + dns_zone_attach(zone->raw, raw); + UNLOCK(&zone->lock); +} + +struct keydone { + isc_event_t event; + bool all; + unsigned char data[5]; +}; + +#define PENDINGFLAGS (DNS_NSEC3FLAG_CREATE|DNS_NSEC3FLAG_INITIAL) + +static void +keydone(isc_task_t *task, isc_event_t *event) { + const char *me = "keydone"; + bool commit = false; + isc_result_t result; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_dbversion_t *oldver = NULL, *newver = NULL; + dns_zone_t *zone; + dns_db_t *db = NULL; + dns_dbnode_t *node = NULL; + dns_rdataset_t rdataset; + dns_diff_t diff; + struct keydone *kd = (struct keydone *)event; + dns_update_log_t log = { update_log_cb, NULL }; + bool clear_pending = false; + + UNUSED(task); + + zone = event->ev_arg; + INSIST(DNS_ZONE_VALID(zone)); + + ENTER; + + dns_rdataset_init(&rdataset); + dns_diff_init(zone->mctx, &diff); + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) + dns_db_attach(zone->db, &db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + if (db == NULL) + goto failure; + + dns_db_currentversion(db, &oldver); + result = dns_db_newversion(db, &newver); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "keydone:dns_db_newversion -> %s", + dns_result_totext(result)); + goto failure; + } + + result = dns_db_getoriginnode(db, &node); + if (result != ISC_R_SUCCESS) + goto failure; + + result = dns_db_findrdataset(db, node, newver, zone->privatetype, + dns_rdatatype_none, 0, &rdataset, NULL); + if (result == ISC_R_NOTFOUND) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + goto failure; + } + if (result != ISC_R_SUCCESS) { + INSIST(!dns_rdataset_isassociated(&rdataset)); + goto failure; + } + + for (result = dns_rdataset_first(&rdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rdataset)) { + bool found = false; + + dns_rdataset_current(&rdataset, &rdata); + + if (kd->all) { + if (rdata.length == 5 && rdata.data[0] != 0 && + rdata.data[3] == 0 && rdata.data[4] == 1) + found = true; + else if (rdata.data[0] == 0 && + (rdata.data[2] & PENDINGFLAGS) != 0) { + found = true; + clear_pending = true; + } + } else if (rdata.length == 5 && + memcmp(rdata.data, kd->data, 5) == 0) + found = true; + + if (found) + CHECK(update_one_rr(db, newver, &diff, DNS_DIFFOP_DEL, + &zone->origin, rdataset.ttl, + &rdata)); + dns_rdata_reset(&rdata); + } + + if (!ISC_LIST_EMPTY(diff.tuples)) { + /* Write changes to journal file. */ + CHECK(update_soa_serial(db, newver, &diff, zone->mctx, + zone->updatemethod)); + + result = dns_update_signatures(&log, zone, db, + oldver, newver, &diff, + zone->sigvalidityinterval); + if (!clear_pending) + CHECK(result); + + CHECK(zone_journal(zone, &diff, NULL, "keydone")); + commit = true; + + LOCK_ZONE(zone); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED); + zone_needdump(zone, 30); + UNLOCK_ZONE(zone); + } + + failure: + if (dns_rdataset_isassociated(&rdataset)) + dns_rdataset_disassociate(&rdataset); + if (db != NULL) { + if (node != NULL) + dns_db_detachnode(db, &node); + if (oldver != NULL) + dns_db_closeversion(db, &oldver, false); + if (newver != NULL) + dns_db_closeversion(db, &newver, commit); + dns_db_detach(&db); + } + dns_diff_clear(&diff); + isc_event_free(&event); + dns_zone_idetach(&zone); + + INSIST(oldver == NULL); + INSIST(newver == NULL); +} + +isc_result_t +dns_zone_keydone(dns_zone_t *zone, const char *keystr) { + isc_result_t result = ISC_R_SUCCESS; + isc_event_t *e; + isc_buffer_t b; + dns_zone_t *dummy = NULL; + struct keydone *kd; + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + + e = isc_event_allocate(zone->mctx, zone, DNS_EVENT_KEYDONE, keydone, + zone, sizeof(struct keydone)); + if (e == NULL) { + result = ISC_R_NOMEMORY; + goto failure; + } + + kd = (struct keydone *) e; + if (strcasecmp(keystr, "all") == 0) + kd->all = true; + else { + isc_textregion_t r; + const char *algstr; + dns_keytag_t keyid; + dns_secalg_t alg; + size_t n; + + kd->all = false; + + n = sscanf(keystr, "%hu/", &keyid); + if (n == 0U) + CHECK(ISC_R_FAILURE); + + algstr = strchr(keystr, '/'); + if (algstr != NULL) + algstr++; + else + CHECK(ISC_R_FAILURE); + + n = sscanf(algstr, "%hhu", &alg); + if (n == 0U) { + DE_CONST(algstr, r.base); + r.length = strlen(algstr); + CHECK(dns_secalg_fromtext(&alg, &r)); + } + + /* construct a private-type rdata */ + isc_buffer_init(&b, kd->data, sizeof(kd->data)); + isc_buffer_putuint8(&b, alg); + isc_buffer_putuint8(&b, (keyid & 0xff00) >> 8); + isc_buffer_putuint8(&b, (keyid & 0xff)); + isc_buffer_putuint8(&b, 0); + isc_buffer_putuint8(&b, 1); + } + + zone_iattach(zone, &dummy); + isc_task_send(zone->task, &e); + + failure: + if (e != NULL) + isc_event_free(&e); + UNLOCK_ZONE(zone); + return (result); +} + +/* + * Called from the zone task's queue after the relevant event is posted by + * dns_zone_setnsec3param(). + * + * Check whether NSEC3 chain addition or removal specified by the private-type + * record passed with the event was already queued (or even fully performed). + * If not, modify the relevant private-type records at the zone apex and call + * resume_addnsec3chain(). + */ +static void +setnsec3param(isc_task_t *task, isc_event_t *event) { + const char *me = "setnsec3param"; + bool commit = false; + isc_result_t result; + dns_dbversion_t *oldver = NULL, *newver = NULL; + dns_zone_t *zone; + dns_db_t *db = NULL; + dns_dbnode_t *node = NULL; + dns_rdataset_t prdataset, nrdataset; + dns_diff_t diff; + struct np3event *npe = (struct np3event *)event; + nsec3param_t *np; + dns_update_log_t log = { update_log_cb, NULL }; + dns_rdata_t rdata; + bool nseconly; + bool exists = false; + + UNUSED(task); + + zone = event->ev_arg; + INSIST(DNS_ZONE_VALID(zone)); + + ENTER; + + np = &npe->params; + + dns_rdataset_init(&prdataset); + dns_rdataset_init(&nrdataset); + dns_diff_init(zone->mctx, &diff); + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) + dns_db_attach(zone->db, &db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + if (db == NULL) + goto failure; + + dns_db_currentversion(db, &oldver); + result = dns_db_newversion(db, &newver); + if (result != ISC_R_SUCCESS) { + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + dns_zone_log(zone, ISC_LOG_ERROR, + "setnsec3param:dns_db_newversion -> %s", + dns_result_totext(result)); + goto failure; + } + + CHECK(dns_db_getoriginnode(db, &node)); + + /* + * Does a private-type record already exist for this chain? + */ + result = dns_db_findrdataset(db, node, newver, zone->privatetype, + dns_rdatatype_none, 0, &prdataset, NULL); + if (result == ISC_R_SUCCESS) { + for (result = dns_rdataset_first(&prdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&prdataset)) { + dns_rdata_init(&rdata); + dns_rdataset_current(&prdataset, &rdata); + + if (np->length == rdata.length && + memcmp(rdata.data, np->data, np->length) == 0) { + exists = true; + break; + } + } + } else if (result != ISC_R_NOTFOUND) { + INSIST(!dns_rdataset_isassociated(&prdataset)); + goto failure; + } + + /* + * Does the chain already exist? + */ + result = dns_db_findrdataset(db, node, newver, + dns_rdatatype_nsec3param, + dns_rdatatype_none, 0, &nrdataset, NULL); + if (result == ISC_R_SUCCESS) { + for (result = dns_rdataset_first(&nrdataset); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&nrdataset)) { + dns_rdata_init(&rdata); + dns_rdataset_current(&nrdataset, &rdata); + + if (np->length == (rdata.length + 1) && + memcmp(rdata.data, np->data + 1, + np->length - 1) == 0) + { + exists = true; + break; + } + } + } else if (result != ISC_R_NOTFOUND) { + INSIST(!dns_rdataset_isassociated(&nrdataset)); + goto failure; + } + + + /* + * We need to remove any existing NSEC3 chains if the supplied NSEC3 + * parameters are supposed to replace the current ones or if we are + * switching to NSEC. + */ + if (!exists && np->replace && (np->length != 0 || np->nsec)) + CHECK(dns_nsec3param_deletechains(db, newver, zone, + !np->nsec, &diff)); + + if (!exists && np->length != 0) { + /* + * We're creating an NSEC3 chain. Add the private-type record + * passed in the event handler's argument to the zone apex. + * + * If the zone is not currently capable of supporting an NSEC3 + * chain (due to the DNSKEY RRset at the zone apex not existing + * or containing at least one key using an NSEC-only + * algorithm), add the INITIAL flag, so these parameters can be + * used later when NSEC3 becomes available. + */ + dns_rdata_init(&rdata); + + np->data[2] |= DNS_NSEC3FLAG_CREATE; + result = dns_nsec_nseconly(db, newver, &nseconly); + if (result == ISC_R_NOTFOUND || nseconly) + np->data[2] |= DNS_NSEC3FLAG_INITIAL; + + rdata.length = np->length; + rdata.data = np->data; + rdata.type = zone->privatetype; + rdata.rdclass = zone->rdclass; + CHECK(update_one_rr(db, newver, &diff, DNS_DIFFOP_ADD, + &zone->origin, 0, &rdata)); + } + + /* + * If we changed anything in the zone, write changes to journal file + * and set commit to true so that resume_addnsec3chain() will be + * called below in order to kick off adding/removing relevant NSEC3 + * records. + */ + if (!ISC_LIST_EMPTY(diff.tuples)) { + CHECK(update_soa_serial(db, newver, &diff, zone->mctx, + zone->updatemethod)); + result = dns_update_signatures(&log, zone, db, + oldver, newver, &diff, + zone->sigvalidityinterval); + if (result != ISC_R_NOTFOUND) + CHECK(result); + CHECK(zone_journal(zone, &diff, NULL, "setnsec3param")); + commit = true; + + LOCK_ZONE(zone); + DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED); + zone_needdump(zone, 30); + UNLOCK_ZONE(zone); + } + + failure: + if (dns_rdataset_isassociated(&prdataset)) + dns_rdataset_disassociate(&prdataset); + if (dns_rdataset_isassociated(&nrdataset)) + dns_rdataset_disassociate(&nrdataset); + if (node != NULL) + dns_db_detachnode(db, &node); + if (oldver != NULL) + dns_db_closeversion(db, &oldver, false); + if (newver != NULL) + dns_db_closeversion(db, &newver, commit); + if (db != NULL) + dns_db_detach(&db); + if (commit) { + LOCK_ZONE(zone); + resume_addnsec3chain(zone); + UNLOCK_ZONE(zone); + } + dns_diff_clear(&diff); + isc_event_free(&event); + dns_zone_idetach(&zone); + + INSIST(oldver == NULL); + INSIST(newver == NULL); +} + +/* + * Called when an "rndc signing -nsec3param ..." command is received. + * + * Allocate and prepare an nsec3param_t structure which holds information about + * the NSEC3 changes requested for the zone: + * + * - if NSEC3 is to be disabled ("-nsec3param none"), only set the "nsec" + * field of the structure to true and the "replace" field to the value + * of the "replace" argument, leaving other fields initialized to zeros, to + * signal that the zone should be signed using NSEC instead of NSEC3, + * + * - otherwise, prepare NSEC3PARAM RDATA that will eventually be inserted at + * the zone apex, convert it to a private-type record and store the latter + * in the "data" field of the nsec3param_t structure. + * + * Once the nsec3param_t structure is prepared, post an event to the zone's + * task which will cause setnsec3param() to be called with the prepared + * structure passed as an argument. + */ +isc_result_t +dns_zone_setnsec3param(dns_zone_t *zone, uint8_t hash, uint8_t flags, + uint16_t iter, uint8_t saltlen, + unsigned char *salt, bool replace) +{ + isc_result_t result = ISC_R_SUCCESS; + dns_rdata_nsec3param_t param; + dns_rdata_t nrdata = DNS_RDATA_INIT; + dns_rdata_t prdata = DNS_RDATA_INIT; + unsigned char nbuf[DNS_NSEC3PARAM_BUFFERSIZE]; + struct np3event *npe; + nsec3param_t *np; + dns_zone_t *dummy = NULL; + isc_buffer_t b; + isc_event_t *e; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(salt != NULL); + + LOCK_ZONE(zone); + + e = isc_event_allocate(zone->mctx, zone, DNS_EVENT_SETNSEC3PARAM, + setnsec3param, zone, sizeof(struct np3event)); + if (e == NULL) { + result = ISC_R_NOMEMORY; + goto failure; + } + + npe = (struct np3event *) e; + np = &npe->params; + + np->replace = replace; + if (hash == 0) { + np->length = 0; + np->nsec = true; + } else { + param.common.rdclass = zone->rdclass; + param.common.rdtype = dns_rdatatype_nsec3param; + ISC_LINK_INIT(¶m.common, link); + param.mctx = NULL; + param.hash = hash; + param.flags = flags; + param.iterations = iter; + param.salt_length = saltlen; + param.salt = salt; + isc_buffer_init(&b, nbuf, sizeof(nbuf)); + CHECK(dns_rdata_fromstruct(&nrdata, zone->rdclass, + dns_rdatatype_nsec3param, + ¶m, &b)); + dns_nsec3param_toprivate(&nrdata, &prdata, zone->privatetype, + np->data, sizeof(np->data)); + np->length = prdata.length; + np->nsec = false; + } + + /* + * setnsec3param() will silently return early if the zone does not yet + * have a database. Prevent that by queueing the event up if zone->db + * is NULL. All events queued here are subsequently processed by + * receive_secure_db() if it ever gets called or simply freed by + * zone_free() otherwise. + */ + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) { + zone_iattach(zone, &dummy); + isc_task_send(zone->task, &e); + } else { + ISC_LIST_APPEND(zone->setnsec3param_queue, e, ev_link); + e = NULL; + } + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + + failure: + if (e != NULL) + isc_event_free(&e); + UNLOCK_ZONE(zone); + return (result); +} + +isc_result_t +dns_zone_getloadtime(dns_zone_t *zone, isc_time_t *loadtime) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(loadtime != NULL); + + LOCK_ZONE(zone); + *loadtime = zone->loadtime; + UNLOCK_ZONE(zone); + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_zone_getexpiretime(dns_zone_t *zone, isc_time_t *expiretime) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(expiretime != NULL); + + LOCK_ZONE(zone); + *expiretime = zone->expiretime; + UNLOCK_ZONE(zone); + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_zone_getrefreshtime(dns_zone_t *zone, isc_time_t *refreshtime) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(refreshtime != NULL); + + LOCK_ZONE(zone); + *refreshtime = zone->refreshtime; + UNLOCK_ZONE(zone); + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_zone_getrefreshkeytime(dns_zone_t *zone, isc_time_t *refreshkeytime) { + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(refreshkeytime != NULL); + + LOCK_ZONE(zone); + *refreshkeytime = zone->refreshkeytime; + UNLOCK_ZONE(zone); + return (ISC_R_SUCCESS); +} + +unsigned int +dns_zone_getincludes(dns_zone_t *zone, char ***includesp) { + dns_include_t *include; + char **array = NULL; + unsigned int n = 0; + + REQUIRE(DNS_ZONE_VALID(zone)); + REQUIRE(includesp != NULL && *includesp == NULL); + + LOCK_ZONE(zone); + if (zone->nincludes == 0) + goto done; + + array = isc_mem_allocate(zone->mctx, sizeof(char *) * zone->nincludes); + if (array == NULL) + goto done; + for (include = ISC_LIST_HEAD(zone->includes); + include != NULL; + include = ISC_LIST_NEXT(include, link)) { + INSIST(n < zone->nincludes); + array[n++] = isc_mem_strdup(zone->mctx, include->name); + } + INSIST(n == zone->nincludes); + *includesp = array; + + done: + UNLOCK_ZONE(zone); + return (n); +} + +void +dns_zone_setstatlevel(dns_zone_t *zone, dns_zonestat_level_t level) { + REQUIRE(DNS_ZONE_VALID(zone)); + + zone->statlevel = level; +} + +dns_zonestat_level_t +dns_zone_getstatlevel(dns_zone_t *zone) { + REQUIRE(DNS_ZONE_VALID(zone)); + + return (zone->statlevel); +} + +static void +setserial(isc_task_t *task, isc_event_t *event) { + uint32_t oldserial, desired; + const char *me = "setserial"; + bool commit = false; + isc_result_t result; + dns_dbversion_t *oldver = NULL, *newver = NULL; + dns_zone_t *zone; + dns_db_t *db = NULL; + dns_diff_t diff; + struct ssevent *sse = (struct ssevent *)event; + dns_update_log_t log = { update_log_cb, NULL }; + dns_difftuple_t *oldtuple = NULL, *newtuple = NULL; + + UNUSED(task); + + zone = event->ev_arg; + INSIST(DNS_ZONE_VALID(zone)); + + ENTER; + + if (zone->update_disabled) + goto failure; + + desired = sse->serial; + + dns_diff_init(zone->mctx, &diff); + + ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read); + if (zone->db != NULL) + dns_db_attach(zone->db, &db); + ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read); + if (db == NULL) + goto failure; + + dns_db_currentversion(db, &oldver); + result = dns_db_newversion(db, &newver); + if (result != ISC_R_SUCCESS) { + dns_zone_log(zone, ISC_LOG_ERROR, + "setserial:dns_db_newversion -> %s", + dns_result_totext(result)); + goto failure; + } + + CHECK(dns_db_createsoatuple(db, oldver, diff.mctx, + DNS_DIFFOP_DEL, &oldtuple)); + CHECK(dns_difftuple_copy(oldtuple, &newtuple)); + newtuple->op = DNS_DIFFOP_ADD; + + oldserial = dns_soa_getserial(&oldtuple->rdata); + if (desired == 0U) + desired = 1; + if (!isc_serial_gt(desired, oldserial)) { + if (desired != oldserial) + dns_zone_log(zone, ISC_LOG_INFO, + "setserial: desired serial (%u) " + "out of range (%u-%u)", desired, + oldserial + 1, (oldserial + 0x7fffffff)); + goto failure; + } + + dns_soa_setserial(desired, &newtuple->rdata); + CHECK(do_one_tuple(&oldtuple, db, newver, &diff)); + CHECK(do_one_tuple(&newtuple, db, newver, &diff)); + result = dns_update_signatures(&log, zone, db, + oldver, newver, &diff, + zone->sigvalidityinterval); + if (result != ISC_R_NOTFOUND) + CHECK(result); + + /* Write changes to journal file. */ + CHECK(zone_journal(zone, &diff, NULL, "setserial")); + commit = true; + + LOCK_ZONE(zone); + zone_needdump(zone, 30); + UNLOCK_ZONE(zone); + + failure: + if (oldtuple != NULL) + dns_difftuple_free(&oldtuple); + if (newtuple != NULL) + dns_difftuple_free(&newtuple); + if (oldver != NULL) + dns_db_closeversion(db, &oldver, false); + if (newver != NULL) + dns_db_closeversion(db, &newver, commit); + if (db != NULL) + dns_db_detach(&db); + dns_diff_clear(&diff); + isc_event_free(&event); + dns_zone_idetach(&zone); + + INSIST(oldver == NULL); + INSIST(newver == NULL); +} + +isc_result_t +dns_zone_setserial(dns_zone_t *zone, uint32_t serial) { + isc_result_t result = ISC_R_SUCCESS; + dns_zone_t *dummy = NULL; + isc_event_t *e = NULL; + struct ssevent *sse; + + REQUIRE(DNS_ZONE_VALID(zone)); + + LOCK_ZONE(zone); + + if (!inline_secure(zone)) { + if (!dns_zone_isdynamic(zone, true)) { + result = DNS_R_NOTDYNAMIC; + goto failure; + } + } + + if (zone->update_disabled) { + result = DNS_R_FROZEN; + goto failure; + } + + e = isc_event_allocate(zone->mctx, zone, DNS_EVENT_SETSERIAL, + setserial, zone, sizeof(struct ssevent)); + if (e == NULL) { + result = ISC_R_NOMEMORY; + goto failure; + } + + sse = (struct ssevent *)e; + sse->serial = serial; + + zone_iattach(zone, &dummy); + isc_task_send(zone->task, &e); + + failure: + if (e != NULL) + isc_event_free(&e); + UNLOCK_ZONE(zone); + return (result); +} |