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-rw-r--r--lib/dns/sdb.c1598
1 files changed, 1598 insertions, 0 deletions
diff --git a/lib/dns/sdb.c b/lib/dns/sdb.c
new file mode 100644
index 0000000..317eeb0
--- /dev/null
+++ b/lib/dns/sdb.c
@@ -0,0 +1,1598 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * 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 https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*! \file */
+
+#include <inttypes.h>
+#include <stdbool.h>
+#include <string.h>
+
+#include <isc/buffer.h>
+#include <isc/lex.h>
+#include <isc/log.h>
+#include <isc/magic.h>
+#include <isc/mem.h>
+#include <isc/once.h>
+#include <isc/print.h>
+#include <isc/refcount.h>
+#include <isc/region.h>
+#include <isc/result.h>
+#include <isc/util.h>
+
+#include <dns/callbacks.h>
+#include <dns/db.h>
+#include <dns/dbiterator.h>
+#include <dns/fixedname.h>
+#include <dns/log.h>
+#include <dns/rdata.h>
+#include <dns/rdatalist.h>
+#include <dns/rdataset.h>
+#include <dns/rdatasetiter.h>
+#include <dns/rdatatype.h>
+#include <dns/sdb.h>
+#include <dns/types.h>
+
+#include "rdatalist_p.h"
+
+struct dns_sdbimplementation {
+ const dns_sdbmethods_t *methods;
+ void *driverdata;
+ unsigned int flags;
+ isc_mem_t *mctx;
+ isc_mutex_t driverlock;
+ dns_dbimplementation_t *dbimp;
+};
+
+struct dns_sdb {
+ /* Unlocked */
+ dns_db_t common;
+ char *zone;
+ dns_sdbimplementation_t *implementation;
+ void *dbdata;
+
+ /* Atomic */
+ isc_refcount_t references;
+};
+
+struct dns_sdblookup {
+ /* Unlocked */
+ unsigned int magic;
+ dns_sdb_t *sdb;
+ ISC_LIST(dns_rdatalist_t) lists;
+ ISC_LIST(isc_buffer_t) buffers;
+ dns_name_t *name;
+ ISC_LINK(dns_sdblookup_t) link;
+ dns_rdatacallbacks_t callbacks;
+
+ /* Atomic */
+ isc_refcount_t references;
+};
+
+typedef struct dns_sdblookup dns_sdbnode_t;
+
+struct dns_sdballnodes {
+ dns_dbiterator_t common;
+ ISC_LIST(dns_sdbnode_t) nodelist;
+ dns_sdbnode_t *current;
+ dns_sdbnode_t *origin;
+};
+
+typedef dns_sdballnodes_t sdb_dbiterator_t;
+
+typedef struct sdb_rdatasetiter {
+ dns_rdatasetiter_t common;
+ dns_rdatalist_t *current;
+} sdb_rdatasetiter_t;
+
+#define SDB_MAGIC ISC_MAGIC('S', 'D', 'B', '-')
+
+/*%
+ * Note that "impmagic" is not the first four bytes of the struct, so
+ * ISC_MAGIC_VALID cannot be used.
+ */
+#define VALID_SDB(sdb) ((sdb) != NULL && (sdb)->common.impmagic == SDB_MAGIC)
+
+#define SDBLOOKUP_MAGIC ISC_MAGIC('S', 'D', 'B', 'L')
+#define VALID_SDBLOOKUP(sdbl) ISC_MAGIC_VALID(sdbl, SDBLOOKUP_MAGIC)
+#define VALID_SDBNODE(sdbn) VALID_SDBLOOKUP(sdbn)
+
+/* These values are taken from RFC1537 */
+#define SDB_DEFAULT_REFRESH 28800U /* 8 hours */
+#define SDB_DEFAULT_RETRY 7200U /* 2 hours */
+#define SDB_DEFAULT_EXPIRE 604800U /* 7 days */
+#define SDB_DEFAULT_MINIMUM 86400U /* 1 day */
+
+/* This is a reasonable value */
+#define SDB_DEFAULT_TTL (60 * 60 * 24)
+
+#ifdef __COVERITY__
+#define MAYBE_LOCK(sdb) LOCK(&sdb->implementation->driverlock)
+#define MAYBE_UNLOCK(sdb) UNLOCK(&sdb->implementation->driverlock)
+#else /* ifdef __COVERITY__ */
+#define MAYBE_LOCK(sdb) \
+ do { \
+ unsigned int flags = sdb->implementation->flags; \
+ if ((flags & DNS_SDBFLAG_THREADSAFE) == 0) \
+ LOCK(&sdb->implementation->driverlock); \
+ } while (0)
+
+#define MAYBE_UNLOCK(sdb) \
+ do { \
+ unsigned int flags = sdb->implementation->flags; \
+ if ((flags & DNS_SDBFLAG_THREADSAFE) == 0) \
+ UNLOCK(&sdb->implementation->driverlock); \
+ } while (0)
+#endif /* ifdef __COVERITY__ */
+
+static int dummy;
+
+static isc_result_t
+dns_sdb_create(isc_mem_t *mctx, const dns_name_t *origin, dns_dbtype_t type,
+ dns_rdataclass_t rdclass, unsigned int argc, char *argv[],
+ void *driverarg, dns_db_t **dbp);
+
+static isc_result_t
+findrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
+ dns_rdatatype_t type, dns_rdatatype_t covers, isc_stdtime_t now,
+ dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
+
+static isc_result_t
+createnode(dns_sdb_t *sdb, dns_sdbnode_t **nodep);
+
+static void
+destroynode(dns_sdbnode_t *node);
+
+static void
+detachnode(dns_db_t *db, dns_dbnode_t **targetp);
+
+static void
+list_tordataset(dns_rdatalist_t *rdatalist, dns_db_t *db, dns_dbnode_t *node,
+ dns_rdataset_t *rdataset);
+
+static void
+dbiterator_destroy(dns_dbiterator_t **iteratorp);
+static isc_result_t
+dbiterator_first(dns_dbiterator_t *iterator);
+static isc_result_t
+dbiterator_last(dns_dbiterator_t *iterator);
+static isc_result_t
+dbiterator_seek(dns_dbiterator_t *iterator, const dns_name_t *name);
+static isc_result_t
+dbiterator_prev(dns_dbiterator_t *iterator);
+static isc_result_t
+dbiterator_next(dns_dbiterator_t *iterator);
+static isc_result_t
+dbiterator_current(dns_dbiterator_t *iterator, dns_dbnode_t **nodep,
+ dns_name_t *name);
+static isc_result_t
+dbiterator_pause(dns_dbiterator_t *iterator);
+static isc_result_t
+dbiterator_origin(dns_dbiterator_t *iterator, dns_name_t *name);
+
+static dns_dbiteratormethods_t dbiterator_methods = {
+ dbiterator_destroy, dbiterator_first, dbiterator_last,
+ dbiterator_seek, dbiterator_prev, dbiterator_next,
+ dbiterator_current, dbiterator_pause, dbiterator_origin
+};
+
+static void
+rdatasetiter_destroy(dns_rdatasetiter_t **iteratorp);
+static isc_result_t
+rdatasetiter_first(dns_rdatasetiter_t *iterator);
+static isc_result_t
+rdatasetiter_next(dns_rdatasetiter_t *iterator);
+static void
+rdatasetiter_current(dns_rdatasetiter_t *iterator, dns_rdataset_t *rdataset);
+
+static dns_rdatasetitermethods_t rdatasetiter_methods = {
+ rdatasetiter_destroy, rdatasetiter_first, rdatasetiter_next,
+ rdatasetiter_current
+};
+
+/*
+ * Functions used by implementors of simple databases
+ */
+isc_result_t
+dns_sdb_register(const char *drivername, const dns_sdbmethods_t *methods,
+ void *driverdata, unsigned int flags, isc_mem_t *mctx,
+ dns_sdbimplementation_t **sdbimp) {
+ dns_sdbimplementation_t *imp;
+ isc_result_t result;
+
+ REQUIRE(drivername != NULL);
+ REQUIRE(methods != NULL);
+ REQUIRE(methods->lookup != NULL || methods->lookup2 != NULL);
+ REQUIRE(mctx != NULL);
+ REQUIRE(sdbimp != NULL && *sdbimp == NULL);
+ REQUIRE((flags &
+ ~(DNS_SDBFLAG_RELATIVEOWNER | DNS_SDBFLAG_RELATIVERDATA |
+ DNS_SDBFLAG_THREADSAFE | DNS_SDBFLAG_DNS64)) == 0);
+
+ imp = isc_mem_get(mctx, sizeof(dns_sdbimplementation_t));
+ imp->methods = methods;
+ imp->driverdata = driverdata;
+ imp->flags = flags;
+ imp->mctx = NULL;
+ isc_mem_attach(mctx, &imp->mctx);
+ isc_mutex_init(&imp->driverlock);
+
+ imp->dbimp = NULL;
+ result = dns_db_register(drivername, dns_sdb_create, imp, mctx,
+ &imp->dbimp);
+ if (result != ISC_R_SUCCESS) {
+ goto cleanup_mutex;
+ }
+ *sdbimp = imp;
+
+ return (ISC_R_SUCCESS);
+
+cleanup_mutex:
+ isc_mutex_destroy(&imp->driverlock);
+ isc_mem_put(mctx, imp, sizeof(dns_sdbimplementation_t));
+ return (result);
+}
+
+void
+dns_sdb_unregister(dns_sdbimplementation_t **sdbimp) {
+ dns_sdbimplementation_t *imp;
+
+ REQUIRE(sdbimp != NULL && *sdbimp != NULL);
+
+ imp = *sdbimp;
+ *sdbimp = NULL;
+ dns_db_unregister(&imp->dbimp);
+ isc_mutex_destroy(&imp->driverlock);
+
+ isc_mem_putanddetach(&imp->mctx, imp, sizeof(dns_sdbimplementation_t));
+}
+
+static unsigned int
+initial_size(unsigned int len) {
+ unsigned int size;
+
+ for (size = 1024; size < (64 * 1024); size *= 2) {
+ if (len < size) {
+ return (size);
+ }
+ }
+ return (65535);
+}
+
+isc_result_t
+dns_sdb_putrdata(dns_sdblookup_t *lookup, dns_rdatatype_t typeval,
+ dns_ttl_t ttl, const unsigned char *rdatap,
+ unsigned int rdlen) {
+ dns_rdatalist_t *rdatalist;
+ dns_rdata_t *rdata;
+ isc_buffer_t *rdatabuf = NULL;
+ isc_mem_t *mctx;
+ isc_region_t region;
+
+ mctx = lookup->sdb->common.mctx;
+
+ rdatalist = ISC_LIST_HEAD(lookup->lists);
+ while (rdatalist != NULL) {
+ if (rdatalist->type == typeval) {
+ break;
+ }
+ rdatalist = ISC_LIST_NEXT(rdatalist, link);
+ }
+
+ if (rdatalist == NULL) {
+ rdatalist = isc_mem_get(mctx, sizeof(dns_rdatalist_t));
+ dns_rdatalist_init(rdatalist);
+ rdatalist->rdclass = lookup->sdb->common.rdclass;
+ rdatalist->type = typeval;
+ rdatalist->ttl = ttl;
+ ISC_LIST_APPEND(lookup->lists, rdatalist, link);
+ } else if (rdatalist->ttl != ttl) {
+ return (DNS_R_BADTTL);
+ }
+
+ rdata = isc_mem_get(mctx, sizeof(dns_rdata_t));
+
+ isc_buffer_allocate(mctx, &rdatabuf, rdlen);
+ DE_CONST(rdatap, region.base);
+ region.length = rdlen;
+ isc_buffer_copyregion(rdatabuf, &region);
+ isc_buffer_usedregion(rdatabuf, &region);
+ dns_rdata_init(rdata);
+ dns_rdata_fromregion(rdata, rdatalist->rdclass, rdatalist->type,
+ &region);
+ ISC_LIST_APPEND(rdatalist->rdata, rdata, link);
+ ISC_LIST_APPEND(lookup->buffers, rdatabuf, link);
+
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+dns_sdb_putrr(dns_sdblookup_t *lookup, const char *type, dns_ttl_t ttl,
+ const char *data) {
+ unsigned int datalen;
+ dns_rdatatype_t typeval;
+ isc_textregion_t r;
+ isc_lex_t *lex = NULL;
+ isc_result_t result;
+ unsigned char *p = NULL;
+ unsigned int size = 0; /* Init to suppress compiler warning */
+ isc_mem_t *mctx;
+ dns_sdbimplementation_t *imp;
+ const dns_name_t *origin;
+ isc_buffer_t b;
+ isc_buffer_t rb;
+
+ REQUIRE(VALID_SDBLOOKUP(lookup));
+ REQUIRE(type != NULL);
+ REQUIRE(data != NULL);
+
+ mctx = lookup->sdb->common.mctx;
+
+ DE_CONST(type, r.base);
+ r.length = strlen(type);
+ result = dns_rdatatype_fromtext(&typeval, &r);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ imp = lookup->sdb->implementation;
+ if ((imp->flags & DNS_SDBFLAG_RELATIVERDATA) != 0) {
+ origin = &lookup->sdb->common.origin;
+ } else {
+ origin = dns_rootname;
+ }
+
+ result = isc_lex_create(mctx, 64, &lex);
+ if (result != ISC_R_SUCCESS) {
+ goto failure;
+ }
+
+ datalen = strlen(data);
+ size = initial_size(datalen);
+ do {
+ isc_buffer_constinit(&b, data, datalen);
+ isc_buffer_add(&b, datalen);
+ result = isc_lex_openbuffer(lex, &b);
+ if (result != ISC_R_SUCCESS) {
+ goto failure;
+ }
+
+ if (size >= 65535) {
+ size = 65535;
+ }
+ p = isc_mem_get(mctx, size);
+ isc_buffer_init(&rb, p, size);
+ result = dns_rdata_fromtext(NULL, lookup->sdb->common.rdclass,
+ typeval, lex, origin, 0, mctx, &rb,
+ &lookup->callbacks);
+ if (result != ISC_R_NOSPACE) {
+ break;
+ }
+
+ /*
+ * Is the RR too big?
+ */
+ if (size >= 65535) {
+ break;
+ }
+ isc_mem_put(mctx, p, size);
+ p = NULL;
+ size *= 2;
+ } while (result == ISC_R_NOSPACE);
+
+ if (result != ISC_R_SUCCESS) {
+ goto failure;
+ }
+
+ result = dns_sdb_putrdata(lookup, typeval, ttl, isc_buffer_base(&rb),
+ isc_buffer_usedlength(&rb));
+failure:
+ if (p != NULL) {
+ isc_mem_put(mctx, p, size);
+ }
+ if (lex != NULL) {
+ isc_lex_destroy(&lex);
+ }
+
+ return (result);
+}
+
+static isc_result_t
+getnode(dns_sdballnodes_t *allnodes, const char *name, dns_sdbnode_t **nodep) {
+ dns_name_t *newname;
+ const dns_name_t *origin;
+ dns_fixedname_t fnewname;
+ dns_sdb_t *sdb = (dns_sdb_t *)allnodes->common.db;
+ dns_sdbimplementation_t *imp = sdb->implementation;
+ dns_sdbnode_t *sdbnode;
+ isc_mem_t *mctx = sdb->common.mctx;
+ isc_buffer_t b;
+ isc_result_t result;
+
+ newname = dns_fixedname_initname(&fnewname);
+
+ if ((imp->flags & DNS_SDBFLAG_RELATIVERDATA) != 0) {
+ origin = &sdb->common.origin;
+ } else {
+ origin = dns_rootname;
+ }
+ isc_buffer_constinit(&b, name, strlen(name));
+ isc_buffer_add(&b, strlen(name));
+
+ result = dns_name_fromtext(newname, &b, origin, 0, NULL);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ if (allnodes->common.relative_names) {
+ /* All names are relative to the root */
+ unsigned int nlabels = dns_name_countlabels(newname);
+ dns_name_getlabelsequence(newname, 0, nlabels - 1, newname);
+ }
+
+ sdbnode = ISC_LIST_HEAD(allnodes->nodelist);
+ if (sdbnode == NULL || !dns_name_equal(sdbnode->name, newname)) {
+ sdbnode = NULL;
+ result = createnode(sdb, &sdbnode);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ sdbnode->name = isc_mem_get(mctx, sizeof(dns_name_t));
+ dns_name_init(sdbnode->name, NULL);
+ dns_name_dup(newname, mctx, sdbnode->name);
+ ISC_LIST_PREPEND(allnodes->nodelist, sdbnode, link);
+ if (allnodes->origin == NULL &&
+ dns_name_equal(newname, &sdb->common.origin))
+ {
+ allnodes->origin = sdbnode;
+ }
+ }
+ *nodep = sdbnode;
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+dns_sdb_putnamedrr(dns_sdballnodes_t *allnodes, const char *name,
+ const char *type, dns_ttl_t ttl, const char *data) {
+ isc_result_t result;
+ dns_sdbnode_t *sdbnode = NULL;
+ result = getnode(allnodes, name, &sdbnode);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ return (dns_sdb_putrr(sdbnode, type, ttl, data));
+}
+
+isc_result_t
+dns_sdb_putnamedrdata(dns_sdballnodes_t *allnodes, const char *name,
+ dns_rdatatype_t type, dns_ttl_t ttl, const void *rdata,
+ unsigned int rdlen) {
+ isc_result_t result;
+ dns_sdbnode_t *sdbnode = NULL;
+ result = getnode(allnodes, name, &sdbnode);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ return (dns_sdb_putrdata(sdbnode, type, ttl, rdata, rdlen));
+}
+
+isc_result_t
+dns_sdb_putsoa(dns_sdblookup_t *lookup, const char *mname, const char *rname,
+ uint32_t serial) {
+ char str[2 * DNS_NAME_MAXTEXT + 5 * (sizeof("2147483647")) + 7];
+ int n;
+
+ REQUIRE(mname != NULL);
+ REQUIRE(rname != NULL);
+
+ n = snprintf(str, sizeof(str), "%s %s %u %u %u %u %u", mname, rname,
+ serial, SDB_DEFAULT_REFRESH, SDB_DEFAULT_RETRY,
+ SDB_DEFAULT_EXPIRE, SDB_DEFAULT_MINIMUM);
+ if (n >= (int)sizeof(str) || n < 0) {
+ return (ISC_R_NOSPACE);
+ }
+ return (dns_sdb_putrr(lookup, "SOA", SDB_DEFAULT_TTL, str));
+}
+
+/*
+ * DB routines
+ */
+
+static void
+attach(dns_db_t *source, dns_db_t **targetp) {
+ dns_sdb_t *sdb = (dns_sdb_t *)source;
+
+ REQUIRE(VALID_SDB(sdb));
+
+ isc_refcount_increment(&sdb->references);
+
+ *targetp = source;
+}
+
+static void
+destroy(dns_sdb_t *sdb) {
+ dns_sdbimplementation_t *imp = sdb->implementation;
+
+ isc_refcount_destroy(&sdb->references);
+
+ if (imp->methods->destroy != NULL) {
+ MAYBE_LOCK(sdb);
+ imp->methods->destroy(sdb->zone, imp->driverdata, &sdb->dbdata);
+ MAYBE_UNLOCK(sdb);
+ }
+
+ isc_mem_free(sdb->common.mctx, sdb->zone);
+
+ sdb->common.magic = 0;
+ sdb->common.impmagic = 0;
+
+ dns_name_free(&sdb->common.origin, sdb->common.mctx);
+
+ isc_mem_putanddetach(&sdb->common.mctx, sdb, sizeof(dns_sdb_t));
+}
+
+static void
+detach(dns_db_t **dbp) {
+ dns_sdb_t *sdb = (dns_sdb_t *)(*dbp);
+
+ REQUIRE(VALID_SDB(sdb));
+
+ *dbp = NULL;
+
+ if (isc_refcount_decrement(&sdb->references) == 1) {
+ destroy(sdb);
+ }
+}
+
+static isc_result_t
+beginload(dns_db_t *db, dns_rdatacallbacks_t *callbacks) {
+ UNUSED(db);
+ UNUSED(callbacks);
+ return (ISC_R_NOTIMPLEMENTED);
+}
+
+static isc_result_t
+endload(dns_db_t *db, dns_rdatacallbacks_t *callbacks) {
+ UNUSED(db);
+ UNUSED(callbacks);
+ return (ISC_R_NOTIMPLEMENTED);
+}
+
+static isc_result_t
+dump(dns_db_t *db, dns_dbversion_t *version, const char *filename,
+ dns_masterformat_t masterformat) {
+ UNUSED(db);
+ UNUSED(version);
+ UNUSED(filename);
+ UNUSED(masterformat);
+ return (ISC_R_NOTIMPLEMENTED);
+}
+
+static void
+currentversion(dns_db_t *db, dns_dbversion_t **versionp) {
+ REQUIRE(versionp != NULL && *versionp == NULL);
+
+ UNUSED(db);
+
+ *versionp = (void *)&dummy;
+ return;
+}
+
+static isc_result_t
+newversion(dns_db_t *db, dns_dbversion_t **versionp) {
+ UNUSED(db);
+ UNUSED(versionp);
+
+ return (ISC_R_NOTIMPLEMENTED);
+}
+
+static void
+attachversion(dns_db_t *db, dns_dbversion_t *source,
+ dns_dbversion_t **targetp) {
+ REQUIRE(source != NULL && source == (void *)&dummy);
+ REQUIRE(targetp != NULL && *targetp == NULL);
+
+ UNUSED(db);
+ *targetp = source;
+ return;
+}
+
+static void
+closeversion(dns_db_t *db, dns_dbversion_t **versionp, bool commit) {
+ REQUIRE(versionp != NULL && *versionp == (void *)&dummy);
+ REQUIRE(!commit);
+
+ UNUSED(db);
+ UNUSED(commit);
+
+ *versionp = NULL;
+}
+
+static isc_result_t
+createnode(dns_sdb_t *sdb, dns_sdbnode_t **nodep) {
+ dns_sdbnode_t *node;
+
+ node = isc_mem_get(sdb->common.mctx, sizeof(dns_sdbnode_t));
+
+ node->sdb = NULL;
+ attach((dns_db_t *)sdb, (dns_db_t **)&node->sdb);
+ ISC_LIST_INIT(node->lists);
+ ISC_LIST_INIT(node->buffers);
+ ISC_LINK_INIT(node, link);
+ node->name = NULL;
+ dns_rdatacallbacks_init(&node->callbacks);
+
+ isc_refcount_init(&node->references, 1);
+
+ node->magic = SDBLOOKUP_MAGIC;
+
+ *nodep = node;
+ return (ISC_R_SUCCESS);
+}
+
+static void
+destroynode(dns_sdbnode_t *node) {
+ dns_rdatalist_t *list;
+ dns_rdata_t *rdata;
+ isc_buffer_t *b;
+ dns_sdb_t *sdb;
+ isc_mem_t *mctx;
+
+ sdb = node->sdb;
+ mctx = sdb->common.mctx;
+
+ while (!ISC_LIST_EMPTY(node->lists)) {
+ list = ISC_LIST_HEAD(node->lists);
+ while (!ISC_LIST_EMPTY(list->rdata)) {
+ rdata = ISC_LIST_HEAD(list->rdata);
+ ISC_LIST_UNLINK(list->rdata, rdata, link);
+ isc_mem_put(mctx, rdata, sizeof(dns_rdata_t));
+ }
+ ISC_LIST_UNLINK(node->lists, list, link);
+ isc_mem_put(mctx, list, sizeof(dns_rdatalist_t));
+ }
+
+ while (!ISC_LIST_EMPTY(node->buffers)) {
+ b = ISC_LIST_HEAD(node->buffers);
+ ISC_LIST_UNLINK(node->buffers, b, link);
+ isc_buffer_free(&b);
+ }
+
+ if (node->name != NULL) {
+ dns_name_free(node->name, mctx);
+ isc_mem_put(mctx, node->name, sizeof(dns_name_t));
+ }
+
+ node->magic = 0;
+ isc_mem_put(mctx, node, sizeof(dns_sdbnode_t));
+ detach((dns_db_t **)(void *)&sdb);
+}
+
+static isc_result_t
+getoriginnode(dns_db_t *db, dns_dbnode_t **nodep) {
+ dns_sdb_t *sdb = (dns_sdb_t *)db;
+ dns_sdbnode_t *node = NULL;
+ isc_result_t result;
+ isc_buffer_t b;
+ char namestr[DNS_NAME_MAXTEXT + 1];
+ dns_sdbimplementation_t *imp;
+ dns_name_t relname;
+ dns_name_t *name;
+
+ REQUIRE(VALID_SDB(sdb));
+ REQUIRE(nodep != NULL && *nodep == NULL);
+
+ imp = sdb->implementation;
+ name = &sdb->common.origin;
+
+ if (imp->methods->lookup2 != NULL) {
+ if ((imp->flags & DNS_SDBFLAG_RELATIVEOWNER) != 0) {
+ dns_name_init(&relname, NULL);
+ name = &relname;
+ }
+ } else {
+ isc_buffer_init(&b, namestr, sizeof(namestr));
+ if ((imp->flags & DNS_SDBFLAG_RELATIVEOWNER) != 0) {
+ dns_name_init(&relname, NULL);
+ result = dns_name_totext(&relname, true, &b);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ } else {
+ result = dns_name_totext(name, true, &b);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ }
+ isc_buffer_putuint8(&b, 0);
+ }
+
+ result = createnode(sdb, &node);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ MAYBE_LOCK(sdb);
+ if (imp->methods->lookup2 != NULL) {
+ result = imp->methods->lookup2(&sdb->common.origin, name,
+ sdb->dbdata, node, NULL, NULL);
+ } else {
+ result = imp->methods->lookup(sdb->zone, namestr, sdb->dbdata,
+ node, NULL, NULL);
+ }
+ MAYBE_UNLOCK(sdb);
+ if (result != ISC_R_SUCCESS &&
+ !(result == ISC_R_NOTFOUND && imp->methods->authority != NULL))
+ {
+ destroynode(node);
+ return (result);
+ }
+
+ if (imp->methods->authority != NULL) {
+ MAYBE_LOCK(sdb);
+ result = imp->methods->authority(sdb->zone, sdb->dbdata, node);
+ MAYBE_UNLOCK(sdb);
+ if (result != ISC_R_SUCCESS) {
+ destroynode(node);
+ return (result);
+ }
+ }
+
+ *nodep = node;
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+findnodeext(dns_db_t *db, const dns_name_t *name, bool create,
+ dns_clientinfomethods_t *methods, dns_clientinfo_t *clientinfo,
+ dns_dbnode_t **nodep) {
+ dns_sdb_t *sdb = (dns_sdb_t *)db;
+ dns_sdbnode_t *node = NULL;
+ isc_result_t result;
+ isc_buffer_t b;
+ char namestr[DNS_NAME_MAXTEXT + 1];
+ bool isorigin;
+ dns_sdbimplementation_t *imp;
+ dns_name_t relname;
+ unsigned int labels;
+
+ REQUIRE(VALID_SDB(sdb));
+ REQUIRE(nodep != NULL && *nodep == NULL);
+
+ UNUSED(name);
+ UNUSED(create);
+
+ imp = sdb->implementation;
+
+ isorigin = dns_name_equal(name, &sdb->common.origin);
+
+ if (imp->methods->lookup2 != NULL) {
+ if ((imp->flags & DNS_SDBFLAG_RELATIVEOWNER) != 0) {
+ labels = dns_name_countlabels(name) -
+ dns_name_countlabels(&db->origin);
+ dns_name_init(&relname, NULL);
+ dns_name_getlabelsequence(name, 0, labels, &relname);
+ name = &relname;
+ }
+ } else {
+ isc_buffer_init(&b, namestr, sizeof(namestr));
+ if ((imp->flags & DNS_SDBFLAG_RELATIVEOWNER) != 0) {
+ labels = dns_name_countlabels(name) -
+ dns_name_countlabels(&db->origin);
+ dns_name_init(&relname, NULL);
+ dns_name_getlabelsequence(name, 0, labels, &relname);
+ result = dns_name_totext(&relname, true, &b);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ } else {
+ result = dns_name_totext(name, true, &b);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+ }
+ isc_buffer_putuint8(&b, 0);
+ }
+
+ result = createnode(sdb, &node);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ MAYBE_LOCK(sdb);
+ if (imp->methods->lookup2 != NULL) {
+ result = imp->methods->lookup2(&sdb->common.origin, name,
+ sdb->dbdata, node, methods,
+ clientinfo);
+ } else {
+ result = imp->methods->lookup(sdb->zone, namestr, sdb->dbdata,
+ node, methods, clientinfo);
+ }
+ MAYBE_UNLOCK(sdb);
+ if (result != ISC_R_SUCCESS && !(result == ISC_R_NOTFOUND && isorigin &&
+ imp->methods->authority != NULL))
+ {
+ destroynode(node);
+ return (result);
+ }
+
+ if (isorigin && imp->methods->authority != NULL) {
+ MAYBE_LOCK(sdb);
+ result = imp->methods->authority(sdb->zone, sdb->dbdata, node);
+ MAYBE_UNLOCK(sdb);
+ if (result != ISC_R_SUCCESS) {
+ destroynode(node);
+ return (result);
+ }
+ }
+
+ *nodep = node;
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+findext(dns_db_t *db, const dns_name_t *name, dns_dbversion_t *version,
+ dns_rdatatype_t type, unsigned int options, isc_stdtime_t now,
+ dns_dbnode_t **nodep, dns_name_t *foundname,
+ dns_clientinfomethods_t *methods, dns_clientinfo_t *clientinfo,
+ dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset) {
+ dns_sdb_t *sdb = (dns_sdb_t *)db;
+ dns_dbnode_t *node = NULL;
+ dns_fixedname_t fname;
+ dns_rdataset_t xrdataset;
+ dns_name_t *xname;
+ unsigned int nlabels, olabels;
+ isc_result_t result;
+ unsigned int i;
+ unsigned int flags;
+
+ REQUIRE(VALID_SDB(sdb));
+ REQUIRE(nodep == NULL || *nodep == NULL);
+ REQUIRE(version == NULL || version == (void *)&dummy);
+
+ UNUSED(options);
+
+ if (!dns_name_issubdomain(name, &db->origin)) {
+ return (DNS_R_NXDOMAIN);
+ }
+
+ olabels = dns_name_countlabels(&db->origin);
+ nlabels = dns_name_countlabels(name);
+
+ xname = dns_fixedname_initname(&fname);
+
+ if (rdataset == NULL) {
+ dns_rdataset_init(&xrdataset);
+ rdataset = &xrdataset;
+ }
+
+ result = DNS_R_NXDOMAIN;
+ flags = sdb->implementation->flags;
+ i = (flags & DNS_SDBFLAG_DNS64) != 0 ? nlabels : olabels;
+ for (; i <= nlabels; i++) {
+ /*
+ * Look up the next label.
+ */
+ dns_name_getlabelsequence(name, nlabels - i, i, xname);
+ result = findnodeext(db, xname, false, methods, clientinfo,
+ &node);
+ if (result == ISC_R_NOTFOUND) {
+ /*
+ * No data at zone apex?
+ */
+ if (i == olabels) {
+ return (DNS_R_BADDB);
+ }
+ result = DNS_R_NXDOMAIN;
+ continue;
+ }
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ /*
+ * DNS64 zone's don't have DNAME or NS records.
+ */
+ if ((flags & DNS_SDBFLAG_DNS64) != 0) {
+ goto skip;
+ }
+
+ /*
+ * DNS64 zone's don't have DNAME or NS records.
+ */
+ if ((flags & DNS_SDBFLAG_DNS64) != 0) {
+ goto skip;
+ }
+
+ /*
+ * Look for a DNAME at the current label, unless this is
+ * the qname.
+ */
+ if (i < nlabels) {
+ result = findrdataset(db, node, version,
+ dns_rdatatype_dname, 0, now,
+ rdataset, sigrdataset);
+ if (result == ISC_R_SUCCESS) {
+ result = DNS_R_DNAME;
+ break;
+ }
+ }
+
+ /*
+ * Look for an NS at the current label, unless this is the
+ * origin or glue is ok.
+ */
+ if (i != olabels && (options & DNS_DBFIND_GLUEOK) == 0) {
+ result = findrdataset(db, node, version,
+ dns_rdatatype_ns, 0, now,
+ rdataset, sigrdataset);
+ if (result == ISC_R_SUCCESS) {
+ if (i == nlabels && type == dns_rdatatype_any) {
+ result = DNS_R_ZONECUT;
+ dns_rdataset_disassociate(rdataset);
+ if (sigrdataset != NULL &&
+ dns_rdataset_isassociated(
+ sigrdataset))
+ {
+ dns_rdataset_disassociate(
+ sigrdataset);
+ }
+ } else {
+ result = DNS_R_DELEGATION;
+ }
+ break;
+ }
+ }
+
+ /*
+ * If the current name is not the qname, add another label
+ * and try again.
+ */
+ if (i < nlabels) {
+ destroynode(node);
+ node = NULL;
+ continue;
+ }
+
+ skip:
+ /*
+ * If we're looking for ANY, we're done.
+ */
+ if (type == dns_rdatatype_any) {
+ result = ISC_R_SUCCESS;
+ break;
+ }
+
+ /*
+ * Look for the qtype.
+ */
+ result = findrdataset(db, node, version, type, 0, now, rdataset,
+ sigrdataset);
+ if (result == ISC_R_SUCCESS) {
+ break;
+ }
+
+ /*
+ * Look for a CNAME
+ */
+ if (type != dns_rdatatype_cname) {
+ result = findrdataset(db, node, version,
+ dns_rdatatype_cname, 0, now,
+ rdataset, sigrdataset);
+ if (result == ISC_R_SUCCESS) {
+ result = DNS_R_CNAME;
+ break;
+ }
+ }
+
+ result = DNS_R_NXRRSET;
+ break;
+ }
+
+ if (rdataset == &xrdataset && dns_rdataset_isassociated(rdataset)) {
+ dns_rdataset_disassociate(rdataset);
+ }
+
+ if (foundname != NULL) {
+ dns_name_copy(xname, foundname);
+ }
+
+ if (nodep != NULL) {
+ *nodep = node;
+ } else if (node != NULL) {
+ detachnode(db, &node);
+ }
+
+ return (result);
+}
+
+static isc_result_t
+findzonecut(dns_db_t *db, const dns_name_t *name, unsigned int options,
+ isc_stdtime_t now, dns_dbnode_t **nodep, dns_name_t *foundname,
+ dns_name_t *dcname, dns_rdataset_t *rdataset,
+ dns_rdataset_t *sigrdataset) {
+ UNUSED(db);
+ UNUSED(name);
+ UNUSED(options);
+ UNUSED(now);
+ UNUSED(nodep);
+ UNUSED(foundname);
+ UNUSED(dcname);
+ UNUSED(rdataset);
+ UNUSED(sigrdataset);
+
+ return (ISC_R_NOTIMPLEMENTED);
+}
+
+static void
+attachnode(dns_db_t *db, dns_dbnode_t *source, dns_dbnode_t **targetp) {
+ dns_sdb_t *sdb = (dns_sdb_t *)db;
+ dns_sdbnode_t *node = (dns_sdbnode_t *)source;
+
+ REQUIRE(VALID_SDB(sdb));
+
+ UNUSED(sdb);
+
+ isc_refcount_increment(&node->references);
+
+ *targetp = source;
+}
+
+static void
+detachnode(dns_db_t *db, dns_dbnode_t **targetp) {
+ dns_sdb_t *sdb = (dns_sdb_t *)db;
+ dns_sdbnode_t *node;
+
+ REQUIRE(VALID_SDB(sdb));
+ REQUIRE(targetp != NULL && *targetp != NULL);
+
+ UNUSED(sdb);
+
+ node = (dns_sdbnode_t *)(*targetp);
+
+ *targetp = NULL;
+
+ if (isc_refcount_decrement(&node->references) == 1) {
+ destroynode(node);
+ }
+}
+
+static isc_result_t
+expirenode(dns_db_t *db, dns_dbnode_t *node, isc_stdtime_t now) {
+ UNUSED(db);
+ UNUSED(node);
+ UNUSED(now);
+ UNREACHABLE();
+}
+
+static void
+printnode(dns_db_t *db, dns_dbnode_t *node, FILE *out) {
+ UNUSED(db);
+ UNUSED(node);
+ UNUSED(out);
+ return;
+}
+
+static isc_result_t
+createiterator(dns_db_t *db, unsigned int options,
+ dns_dbiterator_t **iteratorp) {
+ dns_sdb_t *sdb = (dns_sdb_t *)db;
+ REQUIRE(VALID_SDB(sdb));
+
+ sdb_dbiterator_t *sdbiter;
+ isc_result_t result;
+ dns_sdbimplementation_t *imp = sdb->implementation;
+
+ if (imp->methods->allnodes == NULL) {
+ return (ISC_R_NOTIMPLEMENTED);
+ }
+
+ if ((options & DNS_DB_NSEC3ONLY) != 0 ||
+ (options & DNS_DB_NONSEC3) != 0)
+ {
+ return (ISC_R_NOTIMPLEMENTED);
+ }
+
+ sdbiter = isc_mem_get(sdb->common.mctx, sizeof(sdb_dbiterator_t));
+
+ sdbiter->common.methods = &dbiterator_methods;
+ sdbiter->common.db = NULL;
+ dns_db_attach(db, &sdbiter->common.db);
+ sdbiter->common.relative_names = ((options & DNS_DB_RELATIVENAMES) !=
+ 0);
+ sdbiter->common.magic = DNS_DBITERATOR_MAGIC;
+ ISC_LIST_INIT(sdbiter->nodelist);
+ sdbiter->current = NULL;
+ sdbiter->origin = NULL;
+
+ MAYBE_LOCK(sdb);
+ result = imp->methods->allnodes(sdb->zone, sdb->dbdata, sdbiter);
+ MAYBE_UNLOCK(sdb);
+ if (result != ISC_R_SUCCESS) {
+ dbiterator_destroy((dns_dbiterator_t **)(void *)&sdbiter);
+ return (result);
+ }
+
+ if (sdbiter->origin != NULL) {
+ ISC_LIST_UNLINK(sdbiter->nodelist, sdbiter->origin, link);
+ ISC_LIST_PREPEND(sdbiter->nodelist, sdbiter->origin, link);
+ }
+
+ *iteratorp = (dns_dbiterator_t *)sdbiter;
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+findrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
+ dns_rdatatype_t type, dns_rdatatype_t covers, isc_stdtime_t now,
+ dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset) {
+ REQUIRE(VALID_SDBNODE(node));
+
+ dns_rdatalist_t *list;
+ dns_sdbnode_t *sdbnode = (dns_sdbnode_t *)node;
+
+ UNUSED(db);
+ UNUSED(version);
+ UNUSED(covers);
+ UNUSED(now);
+ UNUSED(sigrdataset);
+
+ if (type == dns_rdatatype_rrsig) {
+ return (ISC_R_NOTIMPLEMENTED);
+ }
+
+ list = ISC_LIST_HEAD(sdbnode->lists);
+ while (list != NULL) {
+ if (list->type == type) {
+ break;
+ }
+ list = ISC_LIST_NEXT(list, link);
+ }
+ if (list == NULL) {
+ return (ISC_R_NOTFOUND);
+ }
+
+ list_tordataset(list, db, node, rdataset);
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+allrdatasets(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
+ unsigned int options, isc_stdtime_t now,
+ dns_rdatasetiter_t **iteratorp) {
+ sdb_rdatasetiter_t *iterator;
+
+ REQUIRE(version == NULL || version == &dummy);
+
+ UNUSED(version);
+ UNUSED(now);
+
+ iterator = isc_mem_get(db->mctx, sizeof(sdb_rdatasetiter_t));
+
+ iterator->common.magic = DNS_RDATASETITER_MAGIC;
+ iterator->common.methods = &rdatasetiter_methods;
+ iterator->common.db = db;
+ iterator->common.node = NULL;
+ attachnode(db, node, &iterator->common.node);
+ iterator->common.version = version;
+ iterator->common.options = options;
+ iterator->common.now = now;
+
+ *iteratorp = (dns_rdatasetiter_t *)iterator;
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+addrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
+ isc_stdtime_t now, dns_rdataset_t *rdataset, unsigned int options,
+ dns_rdataset_t *addedrdataset) {
+ UNUSED(db);
+ UNUSED(node);
+ UNUSED(version);
+ UNUSED(now);
+ UNUSED(rdataset);
+ UNUSED(options);
+ UNUSED(addedrdataset);
+
+ return (ISC_R_NOTIMPLEMENTED);
+}
+
+static isc_result_t
+subtractrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
+ dns_rdataset_t *rdataset, unsigned int options,
+ dns_rdataset_t *newrdataset) {
+ UNUSED(db);
+ UNUSED(node);
+ UNUSED(version);
+ UNUSED(rdataset);
+ UNUSED(options);
+ UNUSED(newrdataset);
+
+ return (ISC_R_NOTIMPLEMENTED);
+}
+
+static isc_result_t
+deleterdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
+ dns_rdatatype_t type, dns_rdatatype_t covers) {
+ UNUSED(db);
+ UNUSED(node);
+ UNUSED(version);
+ UNUSED(type);
+ UNUSED(covers);
+
+ return (ISC_R_NOTIMPLEMENTED);
+}
+
+static bool
+issecure(dns_db_t *db) {
+ UNUSED(db);
+
+ return (false);
+}
+
+static unsigned int
+nodecount(dns_db_t *db, dns_dbtree_t tree) {
+ UNUSED(db);
+ UNUSED(tree);
+
+ return (0);
+}
+
+static bool
+ispersistent(dns_db_t *db) {
+ UNUSED(db);
+ return (true);
+}
+
+static void
+overmem(dns_db_t *db, bool over) {
+ UNUSED(db);
+ UNUSED(over);
+}
+
+static void
+settask(dns_db_t *db, isc_task_t *task) {
+ UNUSED(db);
+ UNUSED(task);
+}
+
+static dns_dbmethods_t sdb_methods = {
+ attach, detach,
+ beginload, endload,
+ dump, currentversion,
+ newversion, attachversion,
+ closeversion, NULL, /* findnode */
+ NULL, /* find */
+ findzonecut, attachnode,
+ detachnode, expirenode,
+ printnode, createiterator,
+ findrdataset, allrdatasets,
+ addrdataset, subtractrdataset,
+ deleterdataset, issecure,
+ nodecount, ispersistent,
+ overmem, settask,
+ getoriginnode, /* getoriginnode */
+ NULL, /* transfernode */
+ NULL, /* getnsec3parameters */
+ NULL, /* findnsec3node */
+ NULL, /* setsigningtime */
+ NULL, /* getsigningtime */
+ NULL, /* resigned */
+ NULL, /* isdnssec */
+ NULL, /* getrrsetstats */
+ NULL, /* rpz_attach */
+ NULL, /* rpz_ready */
+ findnodeext, findext,
+ NULL, /* setcachestats */
+ NULL, /* hashsize */
+ NULL, /* nodefullname */
+ NULL, /* getsize */
+ NULL, /* setservestalettl */
+ NULL, /* getservestalettl */
+ NULL, /* setservestalerefresh */
+ NULL, /* getservestalerefresh */
+ NULL, /* setgluecachestats */
+};
+
+static isc_result_t
+dns_sdb_create(isc_mem_t *mctx, const dns_name_t *origin, dns_dbtype_t type,
+ dns_rdataclass_t rdclass, unsigned int argc, char *argv[],
+ void *driverarg, dns_db_t **dbp) {
+ dns_sdb_t *sdb;
+ isc_result_t result;
+ char zonestr[DNS_NAME_MAXTEXT + 1];
+ isc_buffer_t b;
+ dns_sdbimplementation_t *imp;
+
+ REQUIRE(driverarg != NULL);
+
+ imp = driverarg;
+
+ if (type != dns_dbtype_zone) {
+ return (ISC_R_NOTIMPLEMENTED);
+ }
+
+ sdb = isc_mem_get(mctx, sizeof(dns_sdb_t));
+ memset(sdb, 0, sizeof(dns_sdb_t));
+
+ dns_name_init(&sdb->common.origin, NULL);
+ sdb->common.attributes = 0;
+ sdb->common.methods = &sdb_methods;
+ sdb->common.rdclass = rdclass;
+ sdb->common.mctx = NULL;
+ sdb->implementation = imp;
+
+ isc_mem_attach(mctx, &sdb->common.mctx);
+
+ result = dns_name_dupwithoffsets(origin, mctx, &sdb->common.origin);
+ if (result != ISC_R_SUCCESS) {
+ goto cleanup_lock;
+ }
+
+ isc_buffer_init(&b, zonestr, sizeof(zonestr));
+ result = dns_name_totext(origin, true, &b);
+ if (result != ISC_R_SUCCESS) {
+ goto cleanup_origin;
+ }
+ isc_buffer_putuint8(&b, 0);
+
+ sdb->zone = isc_mem_strdup(mctx, zonestr);
+
+ sdb->dbdata = NULL;
+ if (imp->methods->create != NULL) {
+ MAYBE_LOCK(sdb);
+ result = imp->methods->create(sdb->zone, argc, argv,
+ imp->driverdata, &sdb->dbdata);
+ MAYBE_UNLOCK(sdb);
+ if (result != ISC_R_SUCCESS) {
+ goto cleanup_zonestr;
+ }
+ }
+
+ isc_refcount_init(&sdb->references, 1);
+
+ sdb->common.magic = DNS_DB_MAGIC;
+ sdb->common.impmagic = SDB_MAGIC;
+
+ *dbp = (dns_db_t *)sdb;
+
+ return (ISC_R_SUCCESS);
+
+cleanup_zonestr:
+ isc_mem_free(mctx, sdb->zone);
+cleanup_origin:
+ dns_name_free(&sdb->common.origin, mctx);
+cleanup_lock:
+ isc_mem_putanddetach(&mctx, sdb, sizeof(dns_sdb_t));
+
+ return (result);
+}
+
+/*
+ * Rdataset Methods
+ */
+
+static void
+disassociate(dns_rdataset_t *rdataset) {
+ dns_dbnode_t *node = rdataset->private5;
+ dns_sdbnode_t *sdbnode = (dns_sdbnode_t *)node;
+ dns_db_t *db = (dns_db_t *)sdbnode->sdb;
+
+ detachnode(db, &node);
+ isc__rdatalist_disassociate(rdataset);
+}
+
+static void
+rdataset_clone(dns_rdataset_t *source, dns_rdataset_t *target) {
+ dns_dbnode_t *node = source->private5;
+ dns_sdbnode_t *sdbnode = (dns_sdbnode_t *)node;
+ dns_db_t *db = (dns_db_t *)sdbnode->sdb;
+ dns_dbnode_t *tempdb = NULL;
+
+ isc__rdatalist_clone(source, target);
+ attachnode(db, node, &tempdb);
+ source->private5 = tempdb;
+}
+
+static dns_rdatasetmethods_t sdb_rdataset_methods = {
+ disassociate,
+ isc__rdatalist_first,
+ isc__rdatalist_next,
+ isc__rdatalist_current,
+ rdataset_clone,
+ isc__rdatalist_count,
+ isc__rdatalist_addnoqname,
+ isc__rdatalist_getnoqname,
+ NULL, /* addclosest */
+ NULL, /* getclosest */
+ NULL, /* settrust */
+ NULL, /* expire */
+ NULL, /* clearprefetch */
+ NULL, /* setownercase */
+ NULL, /* getownercase */
+ NULL /* addglue */
+};
+
+static void
+list_tordataset(dns_rdatalist_t *rdatalist, dns_db_t *db, dns_dbnode_t *node,
+ dns_rdataset_t *rdataset) {
+ /*
+ * The sdb rdataset is an rdatalist with some additions.
+ * - private1 & private2 are used by the rdatalist.
+ * - private3 & private 4 are unused.
+ * - private5 is the node.
+ */
+
+ /* This should never fail. */
+ RUNTIME_CHECK(dns_rdatalist_tordataset(rdatalist, rdataset) ==
+ ISC_R_SUCCESS);
+
+ rdataset->methods = &sdb_rdataset_methods;
+ dns_db_attachnode(db, node, &rdataset->private5);
+}
+
+/*
+ * Database Iterator Methods
+ */
+static void
+dbiterator_destroy(dns_dbiterator_t **iteratorp) {
+ sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)(*iteratorp);
+ dns_sdb_t *sdb = (dns_sdb_t *)sdbiter->common.db;
+
+ while (!ISC_LIST_EMPTY(sdbiter->nodelist)) {
+ dns_sdbnode_t *node;
+ node = ISC_LIST_HEAD(sdbiter->nodelist);
+ ISC_LIST_UNLINK(sdbiter->nodelist, node, link);
+ destroynode(node);
+ }
+
+ dns_db_detach(&sdbiter->common.db);
+ isc_mem_put(sdb->common.mctx, sdbiter, sizeof(sdb_dbiterator_t));
+
+ *iteratorp = NULL;
+}
+
+static isc_result_t
+dbiterator_first(dns_dbiterator_t *iterator) {
+ sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
+
+ sdbiter->current = ISC_LIST_HEAD(sdbiter->nodelist);
+ if (sdbiter->current == NULL) {
+ return (ISC_R_NOMORE);
+ } else {
+ return (ISC_R_SUCCESS);
+ }
+}
+
+static isc_result_t
+dbiterator_last(dns_dbiterator_t *iterator) {
+ sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
+
+ sdbiter->current = ISC_LIST_TAIL(sdbiter->nodelist);
+ if (sdbiter->current == NULL) {
+ return (ISC_R_NOMORE);
+ } else {
+ return (ISC_R_SUCCESS);
+ }
+}
+
+static isc_result_t
+dbiterator_seek(dns_dbiterator_t *iterator, const dns_name_t *name) {
+ sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
+
+ sdbiter->current = ISC_LIST_HEAD(sdbiter->nodelist);
+ while (sdbiter->current != NULL) {
+ if (dns_name_equal(sdbiter->current->name, name)) {
+ return (ISC_R_SUCCESS);
+ }
+ sdbiter->current = ISC_LIST_NEXT(sdbiter->current, link);
+ }
+ return (ISC_R_NOTFOUND);
+}
+
+static isc_result_t
+dbiterator_prev(dns_dbiterator_t *iterator) {
+ sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
+
+ sdbiter->current = ISC_LIST_PREV(sdbiter->current, link);
+ if (sdbiter->current == NULL) {
+ return (ISC_R_NOMORE);
+ } else {
+ return (ISC_R_SUCCESS);
+ }
+}
+
+static isc_result_t
+dbiterator_next(dns_dbiterator_t *iterator) {
+ sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
+
+ sdbiter->current = ISC_LIST_NEXT(sdbiter->current, link);
+ if (sdbiter->current == NULL) {
+ return (ISC_R_NOMORE);
+ } else {
+ return (ISC_R_SUCCESS);
+ }
+}
+
+static isc_result_t
+dbiterator_current(dns_dbiterator_t *iterator, dns_dbnode_t **nodep,
+ dns_name_t *name) {
+ sdb_dbiterator_t *sdbiter = (sdb_dbiterator_t *)iterator;
+
+ attachnode(iterator->db, sdbiter->current, nodep);
+ if (name != NULL) {
+ dns_name_copy(sdbiter->current->name, name);
+ return (ISC_R_SUCCESS);
+ }
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+dbiterator_pause(dns_dbiterator_t *iterator) {
+ UNUSED(iterator);
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+dbiterator_origin(dns_dbiterator_t *iterator, dns_name_t *name) {
+ UNUSED(iterator);
+ dns_name_copy(dns_rootname, name);
+ return (ISC_R_SUCCESS);
+}
+
+/*
+ * Rdataset Iterator Methods
+ */
+
+static void
+rdatasetiter_destroy(dns_rdatasetiter_t **iteratorp) {
+ sdb_rdatasetiter_t *sdbiterator = (sdb_rdatasetiter_t *)(*iteratorp);
+ detachnode(sdbiterator->common.db, &sdbiterator->common.node);
+ isc_mem_put(sdbiterator->common.db->mctx, sdbiterator,
+ sizeof(sdb_rdatasetiter_t));
+ *iteratorp = NULL;
+}
+
+static isc_result_t
+rdatasetiter_first(dns_rdatasetiter_t *iterator) {
+ sdb_rdatasetiter_t *sdbiterator = (sdb_rdatasetiter_t *)iterator;
+ dns_sdbnode_t *sdbnode = (dns_sdbnode_t *)iterator->node;
+
+ if (ISC_LIST_EMPTY(sdbnode->lists)) {
+ return (ISC_R_NOMORE);
+ }
+ sdbiterator->current = ISC_LIST_HEAD(sdbnode->lists);
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+rdatasetiter_next(dns_rdatasetiter_t *iterator) {
+ sdb_rdatasetiter_t *sdbiterator = (sdb_rdatasetiter_t *)iterator;
+
+ sdbiterator->current = ISC_LIST_NEXT(sdbiterator->current, link);
+ if (sdbiterator->current == NULL) {
+ return (ISC_R_NOMORE);
+ } else {
+ return (ISC_R_SUCCESS);
+ }
+}
+
+static void
+rdatasetiter_current(dns_rdatasetiter_t *iterator, dns_rdataset_t *rdataset) {
+ sdb_rdatasetiter_t *sdbiterator = (sdb_rdatasetiter_t *)iterator;
+
+ list_tordataset(sdbiterator->current, iterator->db, iterator->node,
+ rdataset);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-04 02:44:07 +0000