diff options
Diffstat (limited to 'lib/dns/master.c')
| -rw-r--r-- | lib/dns/master.c | 3200 |
1 files changed, 3200 insertions, 0 deletions
diff --git a/lib/dns/master.c b/lib/dns/master.c new file mode 100644 index 0000000..97b9343 --- /dev/null +++ b/lib/dns/master.c @@ -0,0 +1,3200 @@ +/* + * 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 <isc/atomic.h> +#include <isc/event.h> +#include <isc/lex.h> +#include <isc/magic.h> +#include <isc/mem.h> +#include <isc/print.h> +#include <isc/refcount.h> +#include <isc/result.h> +#include <isc/serial.h> +#include <isc/stdio.h> +#include <isc/stdtime.h> +#include <isc/string.h> +#include <isc/task.h> +#include <isc/util.h> + +#include <dns/callbacks.h> +#include <dns/events.h> +#include <dns/fixedname.h> +#include <dns/master.h> +#include <dns/name.h> +#include <dns/rdata.h> +#include <dns/rdataclass.h> +#include <dns/rdatalist.h> +#include <dns/rdataset.h> +#include <dns/rdatastruct.h> +#include <dns/rdatatype.h> +#include <dns/soa.h> +#include <dns/time.h> +#include <dns/ttl.h> + +/*! + * Grow the number of dns_rdatalist_t (#RDLSZ) and dns_rdata_t (#RDSZ) + * structures by these sizes when we need to. + * + */ +/*% RDLSZ reflects the number of different types with the same name expected. */ +#define RDLSZ 32 +/*% + * RDSZ reflects the number of rdata expected at a give name that can fit into + * 64k. + */ +#define RDSZ 512 + +#define NBUFS 4 +#define MAXWIRESZ 255 + +/*% + * Target buffer size and minimum target size. + * MINTSIZ must be big enough to hold the largest rdata record. + * \brief + * TSIZ >= MINTSIZ + */ +#define TSIZ (128 * 1024) +/*% + * max message size - header - root - type - class - ttl - rdlen + */ +#define MINTSIZ DNS_RDATA_MAXLENGTH +/*% + * Size for tokens in the presentation format, + * The largest tokens are the base64 blocks in KEY and CERT records, + * Largest key allowed is about 1372 bytes but + * there is no fixed upper bound on CERT records. + * 2K is too small for some X.509s, 8K is overkill. + */ +#define TOKENSIZ (8 * 1024) + +/*% + * Buffers sizes for $GENERATE. + */ +#define DNS_MASTER_LHS 2048 +#define DNS_MASTER_RHS MINTSIZ + +#define CHECKNAMESFAIL(x) (((x)&DNS_MASTER_CHECKNAMESFAIL) != 0) + +typedef ISC_LIST(dns_rdatalist_t) rdatalist_head_t; + +typedef struct dns_incctx dns_incctx_t; + +/*% + * Master file load state. + */ + +struct dns_loadctx { + unsigned int magic; + isc_mem_t *mctx; + dns_masterformat_t format; + + dns_rdatacallbacks_t *callbacks; + isc_task_t *task; + dns_loaddonefunc_t done; + void *done_arg; + + /* Common methods */ + isc_result_t (*openfile)(dns_loadctx_t *lctx, const char *filename); + isc_result_t (*load)(dns_loadctx_t *lctx); + + /* Members used by all formats */ + uint32_t maxttl; + + /* Members specific to the text format: */ + isc_lex_t *lex; + bool keep_lex; + unsigned int options; + bool ttl_known; + bool default_ttl_known; + bool warn_1035; + bool warn_tcr; + bool warn_sigexpired; + bool seen_include; + uint32_t ttl; + uint32_t default_ttl; + dns_rdataclass_t zclass; + dns_fixedname_t fixed_top; + dns_name_t *top; /*%< top of zone */ + + /* Members specific to the raw format: */ + FILE *f; + bool first; + dns_masterrawheader_t header; + + /* Which fixed buffers we are using? */ + unsigned int loop_cnt; /*% records per quantum, + * 0 => all. */ + isc_result_t result; + + /* Atomic */ + isc_refcount_t references; + atomic_bool canceled; + + /* locked by lock */ + dns_incctx_t *inc; + uint32_t resign; + isc_stdtime_t now; + + dns_masterincludecb_t include_cb; + void *include_arg; +}; + +struct dns_incctx { + dns_incctx_t *parent; + dns_name_t *origin; + dns_name_t *current; + dns_name_t *glue; + dns_fixedname_t fixed[NBUFS]; /* working buffers */ + unsigned int in_use[NBUFS]; /* covert to bitmap? */ + int glue_in_use; + int current_in_use; + int origin_in_use; + bool origin_changed; + bool drop; + unsigned int glue_line; + unsigned int current_line; +}; + +#define DNS_LCTX_MAGIC ISC_MAGIC('L', 'c', 't', 'x') +#define DNS_LCTX_VALID(lctx) ISC_MAGIC_VALID(lctx, DNS_LCTX_MAGIC) + +#define DNS_AS_STR(t) ((t).value.as_textregion.base) + +static isc_result_t +openfile_text(dns_loadctx_t *lctx, const char *master_file); + +static isc_result_t +load_text(dns_loadctx_t *lctx); + +static isc_result_t +openfile_raw(dns_loadctx_t *lctx, const char *master_file); + +static isc_result_t +load_raw(dns_loadctx_t *lctx); + +static isc_result_t +pushfile(const char *master_file, dns_name_t *origin, dns_loadctx_t *lctx); + +static isc_result_t +commit(dns_rdatacallbacks_t *, dns_loadctx_t *, rdatalist_head_t *, + dns_name_t *, const char *, unsigned int); + +static bool +is_glue(rdatalist_head_t *, dns_name_t *); + +static dns_rdatalist_t * +grow_rdatalist(int, dns_rdatalist_t *, int, rdatalist_head_t *, + rdatalist_head_t *, isc_mem_t *mctx); + +static dns_rdata_t * +grow_rdata(int, dns_rdata_t *, int, rdatalist_head_t *, rdatalist_head_t *, + isc_mem_t *); + +static void +load_quantum(isc_task_t *task, isc_event_t *event); + +static isc_result_t +task_send(dns_loadctx_t *lctx); + +static void +loadctx_destroy(dns_loadctx_t *lctx); + +#define GETTOKENERR(lexer, options, token, eol, err) \ + do { \ + result = gettoken(lexer, options, token, eol, callbacks); \ + switch (result) { \ + case ISC_R_SUCCESS: \ + break; \ + case ISC_R_UNEXPECTED: \ + goto insist_and_cleanup; \ + default: \ + if (MANYERRS(lctx, result)) { \ + SETRESULT(lctx, result); \ + LOGIT(result); \ + read_till_eol = true; \ + err goto next_line; \ + } else \ + goto log_and_cleanup; \ + } \ + if ((token)->type == isc_tokentype_special) { \ + result = DNS_R_SYNTAX; \ + if (MANYERRS(lctx, result)) { \ + SETRESULT(lctx, result); \ + LOGIT(result); \ + read_till_eol = true; \ + goto next_line; \ + } else \ + goto log_and_cleanup; \ + } \ + } while (0) +#define GETTOKEN(lexer, options, token, eol) \ + GETTOKENERR(lexer, options, token, eol, {}) + +#define COMMITALL \ + do { \ + result = commit(callbacks, lctx, ¤t_list, ictx->current, \ + source, ictx->current_line); \ + if (MANYERRS(lctx, result)) { \ + SETRESULT(lctx, result); \ + } else if (result != ISC_R_SUCCESS) \ + goto insist_and_cleanup; \ + result = commit(callbacks, lctx, &glue_list, ictx->glue, \ + source, ictx->glue_line); \ + if (MANYERRS(lctx, result)) { \ + SETRESULT(lctx, result); \ + } else if (result != ISC_R_SUCCESS) \ + goto insist_and_cleanup; \ + rdcount = 0; \ + rdlcount = 0; \ + isc_buffer_init(&target, target_mem, target_size); \ + rdcount_save = rdcount; \ + rdlcount_save = rdlcount; \ + } while (0) + +#define WARNUNEXPECTEDEOF(lexer) \ + do { \ + if (isc_lex_isfile(lexer)) \ + (*callbacks->warn)(callbacks, \ + "%s: file does not end with " \ + "newline", \ + source); \ + } while (0) + +#define EXPECTEOL \ + do { \ + GETTOKEN(lctx->lex, 0, &token, true); \ + if (token.type != isc_tokentype_eol) { \ + isc_lex_ungettoken(lctx->lex, &token); \ + result = DNS_R_EXTRATOKEN; \ + if (MANYERRS(lctx, result)) { \ + SETRESULT(lctx, result); \ + LOGIT(result); \ + read_till_eol = true; \ + break; \ + } else if (result != ISC_R_SUCCESS) \ + goto log_and_cleanup; \ + } \ + } while (0) + +#define MANYERRS(lctx, result) \ + ((result != ISC_R_SUCCESS) && (result != ISC_R_IOERROR) && \ + ((lctx)->options & DNS_MASTER_MANYERRORS) != 0) + +#define SETRESULT(lctx, r) \ + do { \ + if ((lctx)->result == ISC_R_SUCCESS) \ + (lctx)->result = r; \ + } while (0) + +#define LOGITFILE(result, filename) \ + if (result == ISC_R_INVALIDFILE || result == ISC_R_FILENOTFOUND || \ + result == ISC_R_IOERROR || result == ISC_R_TOOMANYOPENFILES || \ + result == ISC_R_NOPERM) \ + (*callbacks->error)(callbacks, "%s: %s:%lu: %s: %s", \ + "dns_master_load", source, line, filename, \ + isc_result_totext(result)); \ + else \ + LOGIT(result) + +#define LOGIT(result) \ + if (result == ISC_R_NOMEMORY) \ + (*callbacks->error)(callbacks, "dns_master_load: %s", \ + isc_result_totext(result)); \ + else \ + (*callbacks->error)(callbacks, "%s: %s:%lu: %s", \ + "dns_master_load", source, line, \ + isc_result_totext(result)) + +static unsigned char in_addr_arpa_data[] = "\007IN-ADDR\004ARPA"; +static unsigned char in_addr_arpa_offsets[] = { 0, 8, 13 }; +static dns_name_t const in_addr_arpa = + DNS_NAME_INITABSOLUTE(in_addr_arpa_data, in_addr_arpa_offsets); + +static unsigned char ip6_int_data[] = "\003IP6\003INT"; +static unsigned char ip6_int_offsets[] = { 0, 4, 8 }; +static dns_name_t const ip6_int = DNS_NAME_INITABSOLUTE(ip6_int_data, + ip6_int_offsets); + +static unsigned char ip6_arpa_data[] = "\003IP6\004ARPA"; +static unsigned char ip6_arpa_offsets[] = { 0, 4, 9 }; +static dns_name_t const ip6_arpa = DNS_NAME_INITABSOLUTE(ip6_arpa_data, + ip6_arpa_offsets); + +static bool +dns_master_isprimary(dns_loadctx_t *lctx) { + return ((lctx->options & DNS_MASTER_ZONE) != 0 && + (lctx->options & DNS_MASTER_SECONDARY) == 0 && + (lctx->options & DNS_MASTER_KEY) == 0); +} + +static isc_result_t +gettoken(isc_lex_t *lex, unsigned int options, isc_token_t *token, bool eol, + dns_rdatacallbacks_t *callbacks) { + isc_result_t result; + + options |= ISC_LEXOPT_EOL | ISC_LEXOPT_EOF | ISC_LEXOPT_DNSMULTILINE | + ISC_LEXOPT_ESCAPE; + result = isc_lex_gettoken(lex, options, token); + if (result != ISC_R_SUCCESS) { + switch (result) { + case ISC_R_NOMEMORY: + return (ISC_R_NOMEMORY); + default: + (*callbacks->error)(callbacks, + "dns_master_load: %s:%lu:" + " isc_lex_gettoken() failed: %s", + isc_lex_getsourcename(lex), + isc_lex_getsourceline(lex), + isc_result_totext(result)); + return (result); + } + /*NOTREACHED*/ + } + if (eol != true) { + if (token->type == isc_tokentype_eol || + token->type == isc_tokentype_eof) + { + { + unsigned long int line; + const char *what; + const char *file; + file = isc_lex_getsourcename(lex); + line = isc_lex_getsourceline(lex); + if (token->type == isc_tokentype_eol) { + line--; + what = "line"; + } else { + what = "file"; + } + (*callbacks->error)(callbacks, + "dns_master_load: %s:%lu: " + "unexpected end of %s", + file, line, what); + return (ISC_R_UNEXPECTEDEND); + } + } + } + return (ISC_R_SUCCESS); +} + +void +dns_loadctx_attach(dns_loadctx_t *source, dns_loadctx_t **target) { + REQUIRE(target != NULL && *target == NULL); + REQUIRE(DNS_LCTX_VALID(source)); + + isc_refcount_increment(&source->references); + + *target = source; +} + +void +dns_loadctx_detach(dns_loadctx_t **lctxp) { + dns_loadctx_t *lctx; + + REQUIRE(lctxp != NULL); + lctx = *lctxp; + *lctxp = NULL; + REQUIRE(DNS_LCTX_VALID(lctx)); + + if (isc_refcount_decrement(&lctx->references) == 1) { + loadctx_destroy(lctx); + } +} + +static void +incctx_destroy(isc_mem_t *mctx, dns_incctx_t *ictx) { + dns_incctx_t *parent; + +again: + parent = ictx->parent; + ictx->parent = NULL; + + isc_mem_put(mctx, ictx, sizeof(*ictx)); + + if (parent != NULL) { + ictx = parent; + goto again; + } +} + +static void +loadctx_destroy(dns_loadctx_t *lctx) { + REQUIRE(DNS_LCTX_VALID(lctx)); + + isc_refcount_destroy(&lctx->references); + + lctx->magic = 0; + if (lctx->inc != NULL) { + incctx_destroy(lctx->mctx, lctx->inc); + } + + if (lctx->f != NULL) { + isc_result_t result = isc_stdio_close(lctx->f); + if (result != ISC_R_SUCCESS) { + UNEXPECTED_ERROR("isc_stdio_close() failed: %s", + isc_result_totext(result)); + } + } + + /* isc_lex_destroy() will close all open streams */ + if (lctx->lex != NULL && !lctx->keep_lex) { + isc_lex_destroy(&lctx->lex); + } + + if (lctx->task != NULL) { + isc_task_detach(&lctx->task); + } + + isc_mem_putanddetach(&lctx->mctx, lctx, sizeof(*lctx)); +} + +static isc_result_t +incctx_create(isc_mem_t *mctx, dns_name_t *origin, dns_incctx_t **ictxp) { + dns_incctx_t *ictx; + isc_region_t r; + int i; + + ictx = isc_mem_get(mctx, sizeof(*ictx)); + + for (i = 0; i < NBUFS; i++) { + dns_fixedname_init(&ictx->fixed[i]); + ictx->in_use[i] = false; + } + + ictx->origin_in_use = 0; + ictx->origin = dns_fixedname_name(&ictx->fixed[ictx->origin_in_use]); + ictx->in_use[ictx->origin_in_use] = true; + dns_name_toregion(origin, &r); + dns_name_fromregion(ictx->origin, &r); + + ictx->glue = NULL; + ictx->current = NULL; + ictx->glue_in_use = -1; + ictx->current_in_use = -1; + ictx->parent = NULL; + ictx->drop = false; + ictx->glue_line = 0; + ictx->current_line = 0; + ictx->origin_changed = true; + + *ictxp = ictx; + return (ISC_R_SUCCESS); +} + +static isc_result_t +loadctx_create(dns_masterformat_t format, isc_mem_t *mctx, unsigned int options, + uint32_t resign, dns_name_t *top, dns_rdataclass_t zclass, + dns_name_t *origin, dns_rdatacallbacks_t *callbacks, + isc_task_t *task, dns_loaddonefunc_t done, void *done_arg, + dns_masterincludecb_t include_cb, void *include_arg, + isc_lex_t *lex, dns_loadctx_t **lctxp) { + dns_loadctx_t *lctx; + isc_result_t result; + isc_region_t r; + isc_lexspecials_t specials; + + REQUIRE(lctxp != NULL && *lctxp == NULL); + REQUIRE(callbacks != NULL); + REQUIRE(callbacks->add != NULL); + REQUIRE(callbacks->error != NULL); + REQUIRE(callbacks->warn != NULL); + REQUIRE(mctx != NULL); + REQUIRE(dns_name_isabsolute(top)); + REQUIRE(dns_name_isabsolute(origin)); + REQUIRE((task == NULL && done == NULL) || + (task != NULL && done != NULL)); + + lctx = isc_mem_get(mctx, sizeof(*lctx)); + + lctx->inc = NULL; + result = incctx_create(mctx, origin, &lctx->inc); + if (result != ISC_R_SUCCESS) { + goto cleanup_ctx; + } + + lctx->maxttl = 0; + + lctx->format = format; + switch (format) { + case dns_masterformat_text: + lctx->openfile = openfile_text; + lctx->load = load_text; + break; + case dns_masterformat_raw: + lctx->openfile = openfile_raw; + lctx->load = load_raw; + break; + default: + UNREACHABLE(); + } + + if (lex != NULL) { + lctx->lex = lex; + lctx->keep_lex = true; + } else { + lctx->lex = NULL; + result = isc_lex_create(mctx, TOKENSIZ, &lctx->lex); + if (result != ISC_R_SUCCESS) { + goto cleanup_inc; + } + lctx->keep_lex = false; + /* + * If specials change update dns_test_rdatafromstring() + * in lib/dns/tests/dnstest.c. + */ + memset(specials, 0, sizeof(specials)); + specials[0] = 1; + specials['('] = 1; + specials[')'] = 1; + specials['"'] = 1; + isc_lex_setspecials(lctx->lex, specials); + isc_lex_setcomments(lctx->lex, ISC_LEXCOMMENT_DNSMASTERFILE); + } + + lctx->ttl_known = ((options & DNS_MASTER_NOTTL) != 0); + lctx->ttl = 0; + lctx->default_ttl_known = lctx->ttl_known; + lctx->default_ttl = 0; + lctx->warn_1035 = true; /* XXX Argument? */ + lctx->warn_tcr = true; /* XXX Argument? */ + lctx->warn_sigexpired = true; /* XXX Argument? */ + lctx->options = options; + lctx->seen_include = false; + lctx->zclass = zclass; + lctx->resign = resign; + lctx->result = ISC_R_SUCCESS; + lctx->include_cb = include_cb; + lctx->include_arg = include_arg; + isc_stdtime_get(&lctx->now); + + lctx->top = dns_fixedname_initname(&lctx->fixed_top); + dns_name_toregion(top, &r); + dns_name_fromregion(lctx->top, &r); + + lctx->f = NULL; + lctx->first = true; + dns_master_initrawheader(&lctx->header); + + lctx->loop_cnt = (done != NULL) ? 100 : 0; + lctx->callbacks = callbacks; + lctx->task = NULL; + if (task != NULL) { + isc_task_attach(task, &lctx->task); + } + lctx->done = done; + lctx->done_arg = done_arg; + atomic_init(&lctx->canceled, false); + lctx->mctx = NULL; + isc_mem_attach(mctx, &lctx->mctx); + + isc_refcount_init(&lctx->references, 1); /* Implicit attach. */ + + lctx->magic = DNS_LCTX_MAGIC; + *lctxp = lctx; + return (ISC_R_SUCCESS); + +cleanup_inc: + incctx_destroy(mctx, lctx->inc); +cleanup_ctx: + isc_mem_put(mctx, lctx, sizeof(*lctx)); + return (result); +} + +static const char *hex = "0123456789abcdef0123456789ABCDEF"; + +/*% + * Convert value into a nibble sequence from least significant to most + * significant nibble. Zero fill upper most significant nibbles if + * required to make the width. + * + * Returns the number of characters that should have been written without + * counting the terminating NUL. + */ +static unsigned int +nibbles(char *numbuf, size_t length, unsigned int width, char mode, int value) { + unsigned int count = 0; + + /* + * This reserve space for the NUL string terminator. + */ + if (length > 0U) { + *numbuf = '\0'; + length--; + } + do { + char val = hex[(value & 0x0f) + ((mode == 'n') ? 0 : 16)]; + value >>= 4; + if (length > 0U) { + *numbuf++ = val; + *numbuf = '\0'; + length--; + } + if (width > 0) { + width--; + } + count++; + /* + * If width is non zero then we need to add a label separator. + * If value is non zero then we need to add another label and + * that requires a label separator. + */ + if (width > 0 || value != 0) { + if (length > 0U) { + *numbuf++ = '.'; + *numbuf = '\0'; + length--; + } + if (width > 0) { + width--; + } + count++; + } + } while (value != 0 || width > 0); + return (count); +} + +static isc_result_t +genname(char *name, int it, char *buffer, size_t length) { + char fmt[sizeof("%04000000000d")]; + char numbuf[128]; + char *cp; + char mode[2] = { 0 }; + char brace[2] = { 0 }; + char comma1[2] = { 0 }; + char comma2[2] = { 0 }; + int delta = 0; + isc_textregion_t r; + unsigned int n; + unsigned int width; + bool nibblemode; + + r.base = buffer; + r.length = (unsigned int)length; + + while (*name != '\0') { + if (*name == '$') { + name++; + if (*name == '$') { + if (r.length == 0) { + return (ISC_R_NOSPACE); + } + r.base[0] = *name++; + isc_textregion_consume(&r, 1); + continue; + } + nibblemode = false; + strlcpy(fmt, "%d", sizeof(fmt)); + /* Get format specifier. */ + if (*name == '{') { + n = sscanf(name, + "{%d%1[,}]%u%1[,}]%1[doxXnN]%1[}]", + &delta, comma1, &width, comma2, mode, + brace); + if (n < 2 || n > 6) { + return (DNS_R_SYNTAX); + } + if (comma1[0] == '}') { + /* %{delta} */ + } else if (comma1[0] == ',' && comma2[0] == '}') + { + /* %{delta,width} */ + n = snprintf(fmt, sizeof(fmt), "%%0%ud", + width); + } else if (comma1[0] == ',' && + comma2[0] == ',' && mode[0] != 0 && + brace[0] == '}') + { + /* %{delta,width,format} */ + if (mode[0] == 'n' || mode[0] == 'N') { + nibblemode = true; + } + n = snprintf(fmt, sizeof(fmt), + "%%0%u%c", width, mode[0]); + } else { + return (DNS_R_SYNTAX); + } + if (n >= sizeof(fmt)) { + return (ISC_R_NOSPACE); + } + /* Skip past closing brace. */ + while (*name != '\0' && *name++ != '}') { + continue; + } + } + /* + * 'it' is >= 0 so we don't need to check for + * underflow. + */ + if ((it > 0 && delta > INT_MAX - it)) { + return (ISC_R_RANGE); + } + if (nibblemode) { + n = nibbles(numbuf, sizeof(numbuf), width, + mode[0], it + delta); + } else { + n = snprintf(numbuf, sizeof(numbuf), fmt, + it + delta); + } + if (n >= sizeof(numbuf)) { + return (ISC_R_NOSPACE); + } + cp = numbuf; + while (*cp != '\0') { + if (r.length == 0) { + return (ISC_R_NOSPACE); + } + r.base[0] = *cp++; + isc_textregion_consume(&r, 1); + } + } else if (*name == '\\') { + if (r.length == 0) { + return (ISC_R_NOSPACE); + } + r.base[0] = *name++; + isc_textregion_consume(&r, 1); + if (*name == '\0') { + continue; + } + if (r.length == 0) { + return (ISC_R_NOSPACE); + } + r.base[0] = *name++; + isc_textregion_consume(&r, 1); + } else { + if (r.length == 0) { + return (ISC_R_NOSPACE); + } + r.base[0] = *name++; + isc_textregion_consume(&r, 1); + } + } + if (r.length == 0) { + return (ISC_R_NOSPACE); + } + r.base[0] = '\0'; + return (ISC_R_SUCCESS); +} + +static isc_result_t +generate(dns_loadctx_t *lctx, char *range, char *lhs, char *gtype, char *rhs, + const char *source, unsigned int line) { + char *target_mem = NULL; + char *lhsbuf = NULL; + char *rhsbuf = NULL; + dns_fixedname_t ownerfixed; + dns_name_t *owner; + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdatacallbacks_t *callbacks; + dns_rdatalist_t rdatalist; + dns_rdatatype_t type; + rdatalist_head_t head; + int target_size = MINTSIZ; /* only one rdata at a time */ + isc_buffer_t buffer; + isc_buffer_t target; + isc_result_t result; + isc_textregion_t r; + int n, start, stop, step = 0; + unsigned int i; + dns_incctx_t *ictx; + char dummy[2]; + + ictx = lctx->inc; + callbacks = lctx->callbacks; + owner = dns_fixedname_initname(&ownerfixed); + ISC_LIST_INIT(head); + + target_mem = isc_mem_get(lctx->mctx, target_size); + rhsbuf = isc_mem_get(lctx->mctx, DNS_MASTER_RHS); + lhsbuf = isc_mem_get(lctx->mctx, DNS_MASTER_LHS); + if (target_mem == NULL || rhsbuf == NULL || lhsbuf == NULL) { + result = ISC_R_NOMEMORY; + goto error_cleanup; + } + isc_buffer_init(&target, target_mem, target_size); + + n = sscanf(range, "%d-%d%1[/]%d", &start, &stop, dummy, &step); + if ((n != 2 && n != 4) || (start < 0) || (stop < 0) || + (n == 4 && step < 1) || (stop < start)) + { + (*callbacks->error)(callbacks, "%s: %s:%lu: invalid range '%s'", + "$GENERATE", source, line, range); + result = DNS_R_SYNTAX; + goto insist_cleanup; + } + if (n == 2) { + step = 1; + } + + /* + * Get type. + */ + r.base = gtype; + r.length = strlen(gtype); + result = dns_rdatatype_fromtext(&type, &r); + if (result != ISC_R_SUCCESS) { + (*callbacks->error)(callbacks, + "%s: %s:%lu: unknown RR type '%s'", + "$GENERATE", source, line, gtype); + goto insist_cleanup; + } + + /* + * RFC2930: TKEY and TSIG are not allowed to be loaded + * from master files. + */ + if (dns_master_isprimary(lctx) && dns_rdatatype_ismeta(type)) { + (*callbacks->error)(callbacks, "%s: %s:%lu: meta RR type '%s'", + "$GENERATE", source, line, gtype); + result = DNS_R_METATYPE; + goto insist_cleanup; + } + + for (i = start; i <= (unsigned int)stop; i += step) { + result = genname(lhs, i, lhsbuf, DNS_MASTER_LHS); + if (result != ISC_R_SUCCESS) { + goto error_cleanup; + } + result = genname(rhs, i, rhsbuf, DNS_MASTER_RHS); + if (result != ISC_R_SUCCESS) { + goto error_cleanup; + } + + isc_buffer_init(&buffer, lhsbuf, strlen(lhsbuf)); + isc_buffer_add(&buffer, strlen(lhsbuf)); + isc_buffer_setactive(&buffer, strlen(lhsbuf)); + result = dns_name_fromtext(owner, &buffer, ictx->origin, 0, + NULL); + if (result != ISC_R_SUCCESS) { + goto error_cleanup; + } + + if (dns_master_isprimary(lctx) && + !dns_name_issubdomain(owner, lctx->top)) + { + char namebuf[DNS_NAME_FORMATSIZE]; + dns_name_format(owner, namebuf, sizeof(namebuf)); + /* + * Ignore out-of-zone data. + */ + (*callbacks->warn)(callbacks, + "%s:%lu: " + "ignoring out-of-zone data (%s)", + source, line, namebuf); + continue; + } + + isc_buffer_init(&buffer, rhsbuf, strlen(rhsbuf)); + isc_buffer_add(&buffer, strlen(rhsbuf)); + isc_buffer_setactive(&buffer, strlen(rhsbuf)); + + result = isc_lex_openbuffer(lctx->lex, &buffer); + if (result != ISC_R_SUCCESS) { + goto error_cleanup; + } + + isc_buffer_init(&target, target_mem, target_size); + result = dns_rdata_fromtext(&rdata, lctx->zclass, type, + lctx->lex, ictx->origin, 0, + lctx->mctx, &target, callbacks); + RUNTIME_CHECK(isc_lex_close(lctx->lex) == ISC_R_SUCCESS); + if (result != ISC_R_SUCCESS) { + goto error_cleanup; + } + + dns_rdatalist_init(&rdatalist); + rdatalist.type = type; + rdatalist.rdclass = lctx->zclass; + rdatalist.ttl = lctx->ttl; + ISC_LIST_PREPEND(head, &rdatalist, link); + ISC_LIST_APPEND(rdatalist.rdata, &rdata, link); + result = commit(callbacks, lctx, &head, owner, source, line); + ISC_LIST_UNLINK(rdatalist.rdata, &rdata, link); + if (result != ISC_R_SUCCESS) { + goto error_cleanup; + } + dns_rdata_reset(&rdata); + } + result = ISC_R_SUCCESS; + goto cleanup; + +error_cleanup: + if (result == ISC_R_NOMEMORY) { + (*callbacks->error)(callbacks, "$GENERATE: %s", + isc_result_totext(result)); + } else { + (*callbacks->error)(callbacks, "$GENERATE: %s:%lu: %s", source, + line, isc_result_totext(result)); + } + +insist_cleanup: + INSIST(result != ISC_R_SUCCESS); + +cleanup: + if (target_mem != NULL) { + isc_mem_put(lctx->mctx, target_mem, target_size); + } + if (lhsbuf != NULL) { + isc_mem_put(lctx->mctx, lhsbuf, DNS_MASTER_LHS); + } + if (rhsbuf != NULL) { + isc_mem_put(lctx->mctx, rhsbuf, DNS_MASTER_RHS); + } + return (result); +} + +static void +limit_ttl(dns_rdatacallbacks_t *callbacks, const char *source, + unsigned int line, uint32_t *ttlp) { + if (*ttlp > 0x7fffffffUL) { + (callbacks->warn)(callbacks, + "%s: %s:%lu: " + "$TTL %lu > MAXTTL, " + "setting $TTL to 0", + "dns_master_load", source, line, *ttlp); + *ttlp = 0; + } +} + +static isc_result_t +check_ns(dns_loadctx_t *lctx, isc_token_t *token, const char *source, + unsigned long line) { + char *tmp = NULL; + isc_result_t result = ISC_R_SUCCESS; + void (*callback)(struct dns_rdatacallbacks *, const char *, ...); + + if ((lctx->options & DNS_MASTER_FATALNS) != 0) { + callback = lctx->callbacks->error; + } else { + callback = lctx->callbacks->warn; + } + + if (token->type == isc_tokentype_string) { + struct in_addr addr; + struct in6_addr addr6; + + tmp = isc_mem_strdup(lctx->mctx, DNS_AS_STR(*token)); + /* + * Catch both "1.2.3.4" and "1.2.3.4." + */ + if (tmp[strlen(tmp) - 1] == '.') { + tmp[strlen(tmp) - 1] = '\0'; + } + if (inet_pton(AF_INET, tmp, &addr) == 1 || + inet_pton(AF_INET6, tmp, &addr6) == 1) + { + result = DNS_R_NSISADDRESS; + } + } + if (result != ISC_R_SUCCESS) { + (*callback)(lctx->callbacks, + "%s:%lu: NS record '%s' " + "appears to be an address", + source, line, DNS_AS_STR(*token)); + } + if (tmp != NULL) { + isc_mem_free(lctx->mctx, tmp); + } + return (result); +} + +static void +check_wildcard(dns_incctx_t *ictx, const char *source, unsigned long line, + dns_rdatacallbacks_t *callbacks) { + dns_name_t *name; + + name = (ictx->glue != NULL) ? ictx->glue : ictx->current; + if (dns_name_internalwildcard(name)) { + char namebuf[DNS_NAME_FORMATSIZE]; + + dns_name_format(name, namebuf, sizeof(namebuf)); + (*callbacks->warn)(callbacks, + "%s:%lu: warning: ownername " + "'%s' contains an non-terminal wildcard", + source, line, namebuf); + } +} + +static isc_result_t +openfile_text(dns_loadctx_t *lctx, const char *master_file) { + return (isc_lex_openfile(lctx->lex, master_file)); +} + +static int +find_free_name(dns_incctx_t *incctx) { + int i; + + for (i = 0; i < (NBUFS - 1); i++) { + if (!incctx->in_use[i]) { + break; + } + } + INSIST(!incctx->in_use[i]); + return (i); +} + +static isc_result_t +load_text(dns_loadctx_t *lctx) { + dns_rdataclass_t rdclass; + dns_rdatatype_t type, covers; + uint32_t ttl_offset = 0; + dns_name_t *new_name; + bool current_has_delegation = false; + bool done = false; + bool finish_origin = false; + bool finish_include = false; + bool read_till_eol = false; + bool initialws; + char *include_file = NULL; + isc_token_t token; + isc_result_t result = ISC_R_UNEXPECTED; + rdatalist_head_t glue_list; + rdatalist_head_t current_list; + dns_rdatalist_t *this; + dns_rdatalist_t *rdatalist = NULL; + dns_rdatalist_t *new_rdatalist; + int rdlcount = 0; + int rdlcount_save = 0; + int rdatalist_size = 0; + isc_buffer_t buffer; + isc_buffer_t target; + isc_buffer_t target_ft; + isc_buffer_t target_save; + dns_rdata_t *rdata = NULL; + dns_rdata_t *new_rdata; + int rdcount = 0; + int rdcount_save = 0; + int rdata_size = 0; + unsigned char *target_mem = NULL; + int target_size = TSIZ; + int new_in_use; + unsigned int loop_cnt = 0; + isc_mem_t *mctx; + dns_rdatacallbacks_t *callbacks; + dns_incctx_t *ictx; + char *range = NULL; + char *lhs = NULL; + char *gtype = NULL; + char *rhs = NULL; + const char *source; + unsigned long line = 0; + bool explicit_ttl; + char classname1[DNS_RDATACLASS_FORMATSIZE]; + char classname2[DNS_RDATACLASS_FORMATSIZE]; + unsigned int options = 0; + + REQUIRE(DNS_LCTX_VALID(lctx)); + callbacks = lctx->callbacks; + mctx = lctx->mctx; + ictx = lctx->inc; + + ISC_LIST_INIT(glue_list); + ISC_LIST_INIT(current_list); + + /* + * Allocate target_size of buffer space. This is greater than twice + * the maximum individual RR data size. + */ + target_mem = isc_mem_get(mctx, target_size); + isc_buffer_init(&target, target_mem, target_size); + target_save = target; + + if ((lctx->options & DNS_MASTER_CHECKNAMES) != 0) { + options |= DNS_RDATA_CHECKNAMES; + } + if ((lctx->options & DNS_MASTER_CHECKNAMESFAIL) != 0) { + options |= DNS_RDATA_CHECKNAMESFAIL; + } + if ((lctx->options & DNS_MASTER_CHECKMX) != 0) { + options |= DNS_RDATA_CHECKMX; + } + if ((lctx->options & DNS_MASTER_CHECKMXFAIL) != 0) { + options |= DNS_RDATA_CHECKMXFAIL; + } + source = isc_lex_getsourcename(lctx->lex); + do { + initialws = false; + line = isc_lex_getsourceline(lctx->lex); + GETTOKEN(lctx->lex, ISC_LEXOPT_INITIALWS | ISC_LEXOPT_QSTRING, + &token, true); + line = isc_lex_getsourceline(lctx->lex); + + if (token.type == isc_tokentype_eof) { + if (read_till_eol) { + WARNUNEXPECTEDEOF(lctx->lex); + } + /* Pop the include stack? */ + if (ictx->parent != NULL) { + COMMITALL; + lctx->inc = ictx->parent; + ictx->parent = NULL; + incctx_destroy(lctx->mctx, ictx); + RUNTIME_CHECK(isc_lex_close(lctx->lex) == + ISC_R_SUCCESS); + line = isc_lex_getsourceline(lctx->lex); + POST(line); + source = isc_lex_getsourcename(lctx->lex); + ictx = lctx->inc; + continue; + } + done = true; + continue; + } + + if (token.type == isc_tokentype_eol) { + read_till_eol = false; + continue; /* blank line */ + } + + if (read_till_eol) { + continue; + } + + if (token.type == isc_tokentype_initialws) { + /* + * Still working on the same name. + */ + initialws = true; + } else if (token.type == isc_tokentype_string || + token.type == isc_tokentype_qstring) + { + /* + * "$" Support. + * + * "$ORIGIN" and "$INCLUDE" can both take domain names. + * The processing of "$ORIGIN" and "$INCLUDE" extends + * across the normal domain name processing. + */ + + if (strcasecmp(DNS_AS_STR(token), "$ORIGIN") == 0) { + GETTOKEN(lctx->lex, 0, &token, false); + finish_origin = true; + } else if (strcasecmp(DNS_AS_STR(token), "$TTL") == 0) { + GETTOKENERR(lctx->lex, 0, &token, false, + lctx->ttl = 0; + lctx->default_ttl_known = true;); + result = dns_ttl_fromtext( + &token.value.as_textregion, &lctx->ttl); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + lctx->ttl = 0; + } else if (result != ISC_R_SUCCESS) { + goto insist_and_cleanup; + } + limit_ttl(callbacks, source, line, &lctx->ttl); + lctx->default_ttl = lctx->ttl; + lctx->default_ttl_known = true; + EXPECTEOL; + continue; + } else if (strcasecmp(DNS_AS_STR(token), "$INCLUDE") == + 0) + { + COMMITALL; + if ((lctx->options & DNS_MASTER_NOINCLUDE) != 0) + { + (callbacks->error)(callbacks, + "%s: %s:%lu: " + "$INCLUDE not " + "allowed", + "dns_master_load", + source, line); + result = DNS_R_REFUSED; + goto insist_and_cleanup; + } + if (ttl_offset != 0) { + (callbacks->error)(callbacks, + "%s: %s:%lu: " + "$INCLUDE " + "may not be used " + "with $DATE", + "dns_master_load", + source, line); + result = DNS_R_SYNTAX; + goto insist_and_cleanup; + } + GETTOKEN(lctx->lex, ISC_LEXOPT_QSTRING, &token, + false); + if (include_file != NULL) { + isc_mem_free(mctx, include_file); + } + include_file = + isc_mem_strdup(mctx, DNS_AS_STR(token)); + GETTOKEN(lctx->lex, 0, &token, true); + + if (token.type == isc_tokentype_eol || + token.type == isc_tokentype_eof) + { + if (token.type == isc_tokentype_eof) { + WARNUNEXPECTEDEOF(lctx->lex); + } + /* + * No origin field. + */ + result = pushfile(include_file, + ictx->origin, lctx); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + LOGITFILE(result, include_file); + continue; + } else if (result != ISC_R_SUCCESS) { + LOGITFILE(result, include_file); + goto insist_and_cleanup; + } + ictx = lctx->inc; + source = isc_lex_getsourcename( + lctx->lex); + line = isc_lex_getsourceline(lctx->lex); + POST(line); + continue; + } + /* + * There is an origin field. Fall through + * to domain name processing code and do + * the actual inclusion later. + */ + finish_include = true; + } else if (strcasecmp(DNS_AS_STR(token), "$DATE") == 0) + { + int64_t dump_time64; + isc_stdtime_t dump_time, current_time; + GETTOKEN(lctx->lex, 0, &token, false); + isc_stdtime_get(¤t_time); + result = dns_time64_fromtext(DNS_AS_STR(token), + &dump_time64); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + LOGIT(result); + dump_time64 = 0; + } else if (result != ISC_R_SUCCESS) { + goto log_and_cleanup; + } + dump_time = (isc_stdtime_t)dump_time64; + if (dump_time != dump_time64) { + UNEXPECTED_ERROR("%s: %s:%lu: $DATE " + "outside epoch", + "dns_master_load", + source, line); + result = ISC_R_UNEXPECTED; + goto insist_and_cleanup; + } + if (dump_time > current_time) { + UNEXPECTED_ERROR("%s: %s:%lu: " + "$DATE in future, " + "using current date", + "dns_master_load", + source, line); + dump_time = current_time; + } + ttl_offset = current_time - dump_time; + EXPECTEOL; + continue; + } else if (strcasecmp(DNS_AS_STR(token), "$GENERATE") == + 0) + { + /* + * Lazy cleanup. + */ + if (range != NULL) { + isc_mem_free(mctx, range); + } + if (lhs != NULL) { + isc_mem_free(mctx, lhs); + } + if (gtype != NULL) { + isc_mem_free(mctx, gtype); + } + if (rhs != NULL) { + isc_mem_free(mctx, rhs); + } + range = lhs = gtype = rhs = NULL; + /* RANGE */ + GETTOKEN(lctx->lex, 0, &token, false); + range = isc_mem_strdup(mctx, DNS_AS_STR(token)); + /* LHS */ + GETTOKEN(lctx->lex, 0, &token, false); + lhs = isc_mem_strdup(mctx, DNS_AS_STR(token)); + rdclass = 0; + explicit_ttl = false; + /* CLASS? */ + GETTOKEN(lctx->lex, 0, &token, false); + if (dns_rdataclass_fromtext( + &rdclass, + &token.value.as_textregion) == + ISC_R_SUCCESS) + { + GETTOKEN(lctx->lex, 0, &token, false); + } + /* TTL? */ + if (dns_ttl_fromtext(&token.value.as_textregion, + &lctx->ttl) == + ISC_R_SUCCESS) + { + limit_ttl(callbacks, source, line, + &lctx->ttl); + lctx->ttl_known = true; + explicit_ttl = true; + GETTOKEN(lctx->lex, 0, &token, false); + } + /* CLASS? */ + if (rdclass == 0 && + dns_rdataclass_fromtext( + &rdclass, + &token.value.as_textregion) == + ISC_R_SUCCESS) + { + GETTOKEN(lctx->lex, 0, &token, false); + } + /* TYPE */ + gtype = isc_mem_strdup(mctx, DNS_AS_STR(token)); + /* RHS */ + GETTOKEN(lctx->lex, ISC_LEXOPT_QSTRING, &token, + false); + rhs = isc_mem_strdup(mctx, DNS_AS_STR(token)); + if (!lctx->ttl_known && + !lctx->default_ttl_known) + { + (*callbacks->error)(callbacks, + "%s: %s:%lu: no " + "TTL specified", + "dns_master_load", + source, line); + result = DNS_R_NOTTL; + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + lctx->ttl = 0; + } else { + goto insist_and_cleanup; + } + } else if (!explicit_ttl && + lctx->default_ttl_known) + { + lctx->ttl = lctx->default_ttl; + } + /* + * If the class specified does not match the + * zone's class print out a error message and + * exit. + */ + if (rdclass != 0 && rdclass != lctx->zclass) { + goto bad_class; + } + result = generate(lctx, range, lhs, gtype, rhs, + source, line); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + } else if (result != ISC_R_SUCCESS) { + goto insist_and_cleanup; + } + EXPECTEOL; + continue; + } else if (strncasecmp(DNS_AS_STR(token), "$", 1) == 0) + { + (callbacks->error)(callbacks, + "%s: %s:%lu: " + "unknown $ directive '%s'", + "dns_master_load", source, + line, DNS_AS_STR(token)); + result = DNS_R_SYNTAX; + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + } else { + goto insist_and_cleanup; + } + } + + /* + * Normal processing resumes. + */ + new_in_use = find_free_name(ictx); + new_name = dns_fixedname_initname( + &ictx->fixed[new_in_use]); + isc_buffer_init(&buffer, token.value.as_region.base, + token.value.as_region.length); + isc_buffer_add(&buffer, token.value.as_region.length); + isc_buffer_setactive(&buffer, + token.value.as_region.length); + result = dns_name_fromtext(new_name, &buffer, + ictx->origin, 0, NULL); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + LOGIT(result); + read_till_eol = true; + continue; + } else if (result != ISC_R_SUCCESS) { + goto log_and_cleanup; + } + + /* + * Finish $ORIGIN / $INCLUDE processing if required. + */ + if (finish_origin) { + if (ictx->origin_in_use != -1) { + ictx->in_use[ictx->origin_in_use] = + false; + } + ictx->origin_in_use = new_in_use; + ictx->in_use[ictx->origin_in_use] = true; + ictx->origin = new_name; + ictx->origin_changed = true; + finish_origin = false; + EXPECTEOL; + continue; + } + if (finish_include) { + finish_include = false; + EXPECTEOL; + result = pushfile(include_file, new_name, lctx); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + LOGITFILE(result, include_file); + continue; + } else if (result != ISC_R_SUCCESS) { + LOGITFILE(result, include_file); + goto insist_and_cleanup; + } + ictx = lctx->inc; + ictx->origin_changed = true; + source = isc_lex_getsourcename(lctx->lex); + line = isc_lex_getsourceline(lctx->lex); + POST(line); + continue; + } + + /* + * "$" Processing Finished + */ + + /* + * If we are processing glue and the new name does + * not match the current glue name, commit the glue + * and pop stacks leaving us in 'normal' processing + * state. Linked lists are undone by commit(). + */ + if (ictx->glue != NULL && + !dns_name_caseequal(ictx->glue, new_name)) + { + result = commit(callbacks, lctx, &glue_list, + ictx->glue, source, + ictx->glue_line); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + } else if (result != ISC_R_SUCCESS) { + goto insist_and_cleanup; + } + if (ictx->glue_in_use != -1) { + ictx->in_use[ictx->glue_in_use] = false; + } + ictx->glue_in_use = -1; + ictx->glue = NULL; + rdcount = rdcount_save; + rdlcount = rdlcount_save; + target = target_save; + } + + /* + * If we are in 'normal' processing state and the new + * name does not match the current name, see if the + * new name is for glue and treat it as such, + * otherwise we have a new name so commit what we + * have. + */ + if ((ictx->glue == NULL) && + (ictx->current == NULL || + !dns_name_caseequal(ictx->current, new_name))) + { + if (current_has_delegation && + is_glue(¤t_list, new_name)) + { + rdcount_save = rdcount; + rdlcount_save = rdlcount; + target_save = target; + ictx->glue = new_name; + ictx->glue_in_use = new_in_use; + ictx->in_use[ictx->glue_in_use] = true; + } else { + result = commit(callbacks, lctx, + ¤t_list, + ictx->current, source, + ictx->current_line); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + } else if (result != ISC_R_SUCCESS) { + goto insist_and_cleanup; + } + rdcount = 0; + rdlcount = 0; + if (ictx->current_in_use != -1) { + ictx->in_use + [ictx->current_in_use] = + false; + } + ictx->current_in_use = new_in_use; + ictx->in_use[ictx->current_in_use] = + true; + ictx->current = new_name; + current_has_delegation = false; + isc_buffer_init(&target, target_mem, + target_size); + } + /* + * Check for internal wildcards. + */ + if ((lctx->options & + DNS_MASTER_CHECKWILDCARD) != 0) + { + check_wildcard(ictx, source, line, + callbacks); + } + } + if (dns_master_isprimary(lctx) && + !dns_name_issubdomain(new_name, lctx->top)) + { + char namebuf[DNS_NAME_FORMATSIZE]; + dns_name_format(new_name, namebuf, + sizeof(namebuf)); + /* + * Ignore out-of-zone data. + */ + (*callbacks->warn)(callbacks, + "%s:%lu: " + "ignoring out-of-zone data " + "(%s)", + source, line, namebuf); + ictx->drop = true; + } else { + ictx->drop = false; + } + } else { + UNEXPECTED_ERROR("%s:%lu: isc_lex_gettoken() returned " + "unexpected token type (%d)", + source, line, token.type); + result = ISC_R_UNEXPECTED; + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + LOGIT(result); + continue; + } else { + goto insist_and_cleanup; + } + } + + /* + * Find TTL, class and type. Both TTL and class are optional + * and may occur in any order if they exist. TTL and class + * come before type which must exist. + * + * [<TTL>] [<class>] <type> <RDATA> + * [<class>] [<TTL>] <type> <RDATA> + */ + + type = 0; + rdclass = 0; + + GETTOKEN(lctx->lex, 0, &token, initialws); + + if (initialws) { + if (token.type == isc_tokentype_eol) { + read_till_eol = false; + continue; /* blank line */ + } + + if (token.type == isc_tokentype_eof) { + WARNUNEXPECTEDEOF(lctx->lex); + read_till_eol = false; + isc_lex_ungettoken(lctx->lex, &token); + continue; + } + + if (ictx->current == NULL) { + (*callbacks->error)(callbacks, + "%s:%lu: no current owner " + "name", + source, line); + result = DNS_R_NOOWNER; + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + read_till_eol = true; + continue; + } else { + goto insist_and_cleanup; + } + } + + if (ictx->origin_changed) { + char cbuf[DNS_NAME_FORMATSIZE]; + char obuf[DNS_NAME_FORMATSIZE]; + dns_name_format(ictx->current, cbuf, + sizeof(cbuf)); + dns_name_format(ictx->origin, obuf, + sizeof(obuf)); + (*callbacks->warn)(callbacks, + "%s:%lu: record with " + "inherited " + "owner (%s) immediately " + "after " + "$ORIGIN (%s)", + source, line, cbuf, obuf); + } + } + + ictx->origin_changed = false; + + if (dns_rdataclass_fromtext(&rdclass, + &token.value.as_textregion) == + ISC_R_SUCCESS) + { + GETTOKEN(lctx->lex, 0, &token, false); + } + + explicit_ttl = false; + result = dns_ttl_fromtext(&token.value.as_textregion, + &lctx->ttl); + if (result == ISC_R_SUCCESS) { + limit_ttl(callbacks, source, line, &lctx->ttl); + explicit_ttl = true; + lctx->ttl_known = true; + GETTOKEN(lctx->lex, 0, &token, false); + } + + if (token.type != isc_tokentype_string) { + UNEXPECTED_ERROR("isc_lex_gettoken() returned " + "unexpected token type"); + result = ISC_R_UNEXPECTED; + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + read_till_eol = true; + continue; + } else { + goto insist_and_cleanup; + } + } + + if (rdclass == 0 && + dns_rdataclass_fromtext(&rdclass, + &token.value.as_textregion) == + ISC_R_SUCCESS) + { + GETTOKEN(lctx->lex, 0, &token, false); + } + + if (token.type != isc_tokentype_string) { + UNEXPECTED_ERROR("isc_lex_gettoken() returned " + "unexpected token type"); + result = ISC_R_UNEXPECTED; + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + read_till_eol = true; + continue; + } else { + goto insist_and_cleanup; + } + } + + result = dns_rdatatype_fromtext(&type, + &token.value.as_textregion); + if (result != ISC_R_SUCCESS) { + (*callbacks->warn)( + callbacks, "%s:%lu: unknown RR type '%.*s'", + source, line, token.value.as_textregion.length, + token.value.as_textregion.base); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + read_till_eol = true; + continue; + } else if (result != ISC_R_SUCCESS) { + goto insist_and_cleanup; + } + } + + /* + * If the class specified does not match the zone's class + * print out a error message and exit. + */ + if (rdclass != 0 && rdclass != lctx->zclass) { + bad_class: + + dns_rdataclass_format(rdclass, classname1, + sizeof(classname1)); + dns_rdataclass_format(lctx->zclass, classname2, + sizeof(classname2)); + (*callbacks->error)(callbacks, + "%s:%lu: class '%s' != " + "zone class '%s'", + source, line, classname1, + classname2); + result = DNS_R_BADCLASS; + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + read_till_eol = true; + continue; + } else { + goto insist_and_cleanup; + } + } + + if (type == dns_rdatatype_ns && ictx->glue == NULL) { + current_has_delegation = true; + } + + /* + * RFC1123: MD and MF are not allowed to be loaded from + * master files. + */ + if (dns_master_isprimary(lctx) && + (type == dns_rdatatype_md || type == dns_rdatatype_mf)) + { + char typebuf[DNS_RDATATYPE_FORMATSIZE]; + + result = DNS_R_OBSOLETE; + + dns_rdatatype_format(type, typebuf, sizeof(typebuf)); + (*callbacks->error)(callbacks, "%s:%lu: %s '%s': %s", + source, line, "type", typebuf, + isc_result_totext(result)); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + } else { + goto insist_and_cleanup; + } + } + + /* + * RFC2930: TKEY and TSIG are not allowed to be loaded + * from master files. + */ + if (dns_master_isprimary(lctx) && dns_rdatatype_ismeta(type)) { + char typebuf[DNS_RDATATYPE_FORMATSIZE]; + + result = DNS_R_METATYPE; + + dns_rdatatype_format(type, typebuf, sizeof(typebuf)); + (*callbacks->error)(callbacks, "%s:%lu: %s '%s': %s", + source, line, "type", typebuf, + isc_result_totext(result)); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + } else { + goto insist_and_cleanup; + } + } + + /* + * Find a rdata structure. + */ + if (rdcount == rdata_size) { + new_rdata = grow_rdata(rdata_size + RDSZ, rdata, + rdata_size, ¤t_list, + &glue_list, mctx); + if (new_rdata == NULL) { + result = ISC_R_NOMEMORY; + goto log_and_cleanup; + } + rdata_size += RDSZ; + rdata = new_rdata; + } + + /* + * Peek at the NS record. + */ + if (type == dns_rdatatype_ns && + lctx->zclass == dns_rdataclass_in && + (lctx->options & DNS_MASTER_CHECKNS) != 0) + { + GETTOKEN(lctx->lex, 0, &token, false); + result = check_ns(lctx, &token, source, line); + isc_lex_ungettoken(lctx->lex, &token); + if ((lctx->options & DNS_MASTER_FATALNS) != 0) { + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + } else if (result != ISC_R_SUCCESS) { + goto insist_and_cleanup; + } + } + } + + /* + * Check owner name. + */ + options &= ~DNS_RDATA_CHECKREVERSE; + if ((lctx->options & DNS_MASTER_CHECKNAMES) != 0) { + bool ok; + dns_name_t *name; + + name = (ictx->glue != NULL) ? ictx->glue + : ictx->current; + ok = dns_rdata_checkowner(name, lctx->zclass, type, + true); + if (!ok) { + char namebuf[DNS_NAME_FORMATSIZE]; + const char *desc; + dns_name_format(name, namebuf, sizeof(namebuf)); + result = DNS_R_BADOWNERNAME; + desc = isc_result_totext(result); + if (CHECKNAMESFAIL(lctx->options) || + type == dns_rdatatype_nsec3) + { + (*callbacks->error)( + callbacks, "%s:%lu: %s: %s", + source, line, namebuf, desc); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + } else { + goto cleanup; + } + } else { + (*callbacks->warn)( + callbacks, "%s:%lu: %s: %s", + source, line, namebuf, desc); + } + } + if (type == dns_rdatatype_ptr && + !dns_name_isdnssd(name) && + (dns_name_issubdomain(name, &in_addr_arpa) || + dns_name_issubdomain(name, &ip6_arpa) || + dns_name_issubdomain(name, &ip6_int))) + { + options |= DNS_RDATA_CHECKREVERSE; + } + } + + /* + * Read rdata contents. + */ + dns_rdata_init(&rdata[rdcount]); + target_ft = target; + result = dns_rdata_fromtext(&rdata[rdcount], lctx->zclass, type, + lctx->lex, ictx->origin, options, + lctx->mctx, &target, callbacks); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + continue; + } else if (result != ISC_R_SUCCESS) { + goto insist_and_cleanup; + } + + if (ictx->drop) { + target = target_ft; + continue; + } + + if (type == dns_rdatatype_soa && + (lctx->options & DNS_MASTER_ZONE) != 0 && + !dns_name_equal(ictx->current, lctx->top)) + { + char namebuf[DNS_NAME_FORMATSIZE]; + dns_name_format(ictx->current, namebuf, + sizeof(namebuf)); + (*callbacks->error)(callbacks, + "%s:%lu: SOA " + "record not at top of zone (%s)", + source, line, namebuf); + result = DNS_R_NOTZONETOP; + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + read_till_eol = true; + target = target_ft; + continue; + } else { + goto insist_and_cleanup; + } + } + + if (dns_rdatatype_atparent(type) && + dns_master_isprimary(lctx) && + dns_name_equal(ictx->current, lctx->top)) + { + char namebuf[DNS_NAME_FORMATSIZE]; + char typebuf[DNS_RDATATYPE_FORMATSIZE]; + + dns_name_format(ictx->current, namebuf, + sizeof(namebuf)); + dns_rdatatype_format(type, typebuf, sizeof(typebuf)); + (*callbacks->error)( + callbacks, + "%s:%lu: %s record at top of zone (%s)", source, + line, typebuf, namebuf); + result = DNS_R_ATZONETOP; + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + target = target_ft; + continue; + } else { + goto insist_and_cleanup; + } + } + + if (type == dns_rdatatype_rrsig || type == dns_rdatatype_sig) { + covers = dns_rdata_covers(&rdata[rdcount]); + } else { + covers = 0; + } + + if (!lctx->ttl_known && !lctx->default_ttl_known) { + if (type == dns_rdatatype_soa) { + (*callbacks->warn)(callbacks, + "%s:%lu: no TTL specified; " + "using SOA MINTTL instead", + source, line); + lctx->ttl = dns_soa_getminimum(&rdata[rdcount]); + limit_ttl(callbacks, source, line, &lctx->ttl); + lctx->default_ttl = lctx->ttl; + lctx->default_ttl_known = true; + } else if ((lctx->options & DNS_MASTER_HINT) != 0) { + /* + * Zero TTL's are fine for hints. + */ + lctx->ttl = 0; + lctx->default_ttl = lctx->ttl; + lctx->default_ttl_known = true; + } else { + (*callbacks->warn)(callbacks, + "%s:%lu: no TTL specified; " + "zone rejected", + source, line); + result = DNS_R_NOTTL; + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + lctx->ttl = 0; + } else { + goto insist_and_cleanup; + } + } + } else if (!explicit_ttl && lctx->default_ttl_known) { + lctx->ttl = lctx->default_ttl; + } else if (!explicit_ttl && lctx->warn_1035) { + (*callbacks->warn)(callbacks, + "%s:%lu: " + "using RFC1035 TTL semantics", + source, line); + lctx->warn_1035 = false; + } + + if (type == dns_rdatatype_rrsig && lctx->warn_sigexpired) { + dns_rdata_rrsig_t sig; + result = dns_rdata_tostruct(&rdata[rdcount], &sig, + NULL); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + if (isc_serial_lt(sig.timeexpire, lctx->now)) { + (*callbacks->warn)(callbacks, + "%s:%lu: " + "signature has expired", + source, line); + lctx->warn_sigexpired = false; + } + } + + if ((type == dns_rdatatype_sig || type == dns_rdatatype_nxt) && + lctx->warn_tcr && dns_master_isprimary(lctx)) + { + (*callbacks->warn)(callbacks, + "%s:%lu: old style DNSSEC " + " zone detected", + source, line); + lctx->warn_tcr = false; + } + + if ((lctx->options & DNS_MASTER_AGETTL) != 0) { + /* + * Adjust the TTL for $DATE. If the RR has + * already expired, set its TTL to 0. This + * should be okay even if the TTL stretching + * feature is not in effect, because it will + * just be quickly expired by the cache, and the + * way this was written before the patch it + * could potentially add 0 TTLs anyway. + */ + if (lctx->ttl < ttl_offset) { + lctx->ttl = 0; + } else { + lctx->ttl -= ttl_offset; + } + } + + /* + * Find type in rdatalist. + * If it does not exist create new one and prepend to list + * as this will minimise list traversal. + */ + if (ictx->glue != NULL) { + this = ISC_LIST_HEAD(glue_list); + } else { + this = ISC_LIST_HEAD(current_list); + } + + while (this != NULL) { + if (this->type == type && this->covers == covers) { + break; + } + this = ISC_LIST_NEXT(this, link); + } + + if (this == NULL) { + if (rdlcount == rdatalist_size) { + new_rdatalist = grow_rdatalist( + rdatalist_size + RDLSZ, rdatalist, + rdatalist_size, ¤t_list, + &glue_list, mctx); + if (new_rdatalist == NULL) { + result = ISC_R_NOMEMORY; + goto log_and_cleanup; + } + rdatalist = new_rdatalist; + rdatalist_size += RDLSZ; + } + this = &rdatalist[rdlcount++]; + dns_rdatalist_init(this); + this->type = type; + this->covers = covers; + this->rdclass = lctx->zclass; + this->ttl = lctx->ttl; + if (ictx->glue != NULL) { + ISC_LIST_INITANDPREPEND(glue_list, this, link); + } else { + ISC_LIST_INITANDPREPEND(current_list, this, + link); + } + } else if (this->ttl != lctx->ttl) { + (*callbacks->warn)(callbacks, + "%s:%lu: " + "TTL set to prior TTL (%lu)", + source, line, this->ttl); + lctx->ttl = this->ttl; + } + + if ((lctx->options & DNS_MASTER_CHECKTTL) != 0 && + lctx->ttl > lctx->maxttl) + { + (callbacks->error)(callbacks, + "dns_master_load: %s:%lu: " + "TTL %d exceeds configured " + "max-zone-ttl %d", + source, line, lctx->ttl, + lctx->maxttl); + result = ISC_R_RANGE; + goto log_and_cleanup; + } + + ISC_LIST_APPEND(this->rdata, &rdata[rdcount], link); + if (ictx->glue != NULL) { + ictx->glue_line = line; + } else { + ictx->current_line = line; + } + rdcount++; + + /* + * We must have at least 64k as rdlen is 16 bits. + * If we don't commit everything we have so far. + */ + if ((target.length - target.used) < MINTSIZ) { + COMMITALL; + } + next_line:; + } while (!done && (lctx->loop_cnt == 0 || loop_cnt++ < lctx->loop_cnt)); + + /* + * Commit what has not yet been committed. + */ + result = commit(callbacks, lctx, ¤t_list, ictx->current, source, + ictx->current_line); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + } else if (result != ISC_R_SUCCESS) { + goto insist_and_cleanup; + } + result = commit(callbacks, lctx, &glue_list, ictx->glue, source, + ictx->glue_line); + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + } else if (result != ISC_R_SUCCESS) { + goto insist_and_cleanup; + } + + if (!done) { + INSIST(lctx->done != NULL && lctx->task != NULL); + result = DNS_R_CONTINUE; + } else if (result == ISC_R_SUCCESS && lctx->result != ISC_R_SUCCESS) { + result = lctx->result; + } else if (result == ISC_R_SUCCESS && lctx->seen_include) { + result = DNS_R_SEENINCLUDE; + } + goto cleanup; + +log_and_cleanup: + LOGIT(result); + +insist_and_cleanup: + INSIST(result != ISC_R_SUCCESS); + +cleanup: + while ((this = ISC_LIST_HEAD(current_list)) != NULL) { + ISC_LIST_UNLINK(current_list, this, link); + } + while ((this = ISC_LIST_HEAD(glue_list)) != NULL) { + ISC_LIST_UNLINK(glue_list, this, link); + } + if (rdatalist != NULL) { + isc_mem_put(mctx, rdatalist, + rdatalist_size * sizeof(*rdatalist)); + } + if (rdata != NULL) { + isc_mem_put(mctx, rdata, rdata_size * sizeof(*rdata)); + } + if (target_mem != NULL) { + isc_mem_put(mctx, target_mem, target_size); + } + if (include_file != NULL) { + isc_mem_free(mctx, include_file); + } + if (range != NULL) { + isc_mem_free(mctx, range); + } + if (lhs != NULL) { + isc_mem_free(mctx, lhs); + } + if (gtype != NULL) { + isc_mem_free(mctx, gtype); + } + if (rhs != NULL) { + isc_mem_free(mctx, rhs); + } + return (result); +} + +static isc_result_t +pushfile(const char *master_file, dns_name_t *origin, dns_loadctx_t *lctx) { + isc_result_t result; + dns_incctx_t *ictx; + dns_incctx_t *newctx = NULL; + isc_region_t r; + + REQUIRE(master_file != NULL); + REQUIRE(DNS_LCTX_VALID(lctx)); + + ictx = lctx->inc; + lctx->seen_include = true; + + result = incctx_create(lctx->mctx, origin, &newctx); + if (result != ISC_R_SUCCESS) { + return (result); + } + + /* + * Push origin_changed. + */ + newctx->origin_changed = ictx->origin_changed; + + /* Set current domain. */ + if (ictx->glue != NULL || ictx->current != NULL) { + newctx->current_in_use = find_free_name(newctx); + newctx->current = dns_fixedname_name( + &newctx->fixed[newctx->current_in_use]); + newctx->in_use[newctx->current_in_use] = true; + dns_name_toregion( + (ictx->glue != NULL) ? ictx->glue : ictx->current, &r); + dns_name_fromregion(newctx->current, &r); + newctx->drop = ictx->drop; + } + + result = (lctx->openfile)(lctx, master_file); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + newctx->parent = ictx; + lctx->inc = newctx; + + if (lctx->include_cb != NULL) { + lctx->include_cb(master_file, lctx->include_arg); + } + return (ISC_R_SUCCESS); + +cleanup: + incctx_destroy(lctx->mctx, newctx); + return (result); +} + +/* + * Fill/check exists buffer with 'len' bytes. Track remaining bytes to be + * read when incrementally filling the buffer. + */ +static isc_result_t +read_and_check(bool do_read, isc_buffer_t *buffer, size_t len, FILE *f, + uint32_t *totallen) { + isc_result_t result; + + REQUIRE(totallen != NULL); + + if (do_read) { + INSIST(isc_buffer_availablelength(buffer) >= len); + result = isc_stdio_read(isc_buffer_used(buffer), 1, len, f, + NULL); + if (result != ISC_R_SUCCESS) { + return (result); + } + isc_buffer_add(buffer, (unsigned int)len); + if (*totallen < len) { + return (ISC_R_RANGE); + } + *totallen -= (uint32_t)len; + } else if (isc_buffer_remaininglength(buffer) < len) { + return (ISC_R_RANGE); + } + + return (ISC_R_SUCCESS); +} + +static isc_result_t +load_header(dns_loadctx_t *lctx) { + isc_result_t result = ISC_R_SUCCESS; + dns_masterrawheader_t header; + dns_rdatacallbacks_t *callbacks; + size_t commonlen = sizeof(header.format) + sizeof(header.version); + size_t remainder; + unsigned char data[sizeof(header)]; + isc_buffer_t target; + + REQUIRE(DNS_LCTX_VALID(lctx)); + + if (lctx->format != dns_masterformat_raw) { + return (ISC_R_NOTIMPLEMENTED); + } + + callbacks = lctx->callbacks; + dns_master_initrawheader(&header); + + INSIST(commonlen <= sizeof(header)); + isc_buffer_init(&target, data, sizeof(data)); + + result = isc_stdio_read(data, 1, commonlen, lctx->f, NULL); + if (result != ISC_R_SUCCESS) { + UNEXPECTED_ERROR("isc_stdio_read failed: %s", + isc_result_totext(result)); + return (result); + } + + isc_buffer_add(&target, (unsigned int)commonlen); + header.format = isc_buffer_getuint32(&target); + if (header.format != lctx->format) { + (*callbacks->error)(callbacks, + "dns_master_load: " + "file format mismatch (not raw)"); + return (ISC_R_NOTIMPLEMENTED); + } + + header.version = isc_buffer_getuint32(&target); + + switch (header.version) { + case 0: + remainder = sizeof(header.dumptime); + break; + case DNS_RAWFORMAT_VERSION: + remainder = sizeof(header) - commonlen; + break; + default: + (*callbacks->error)(callbacks, "dns_master_load: " + "unsupported file format " + "version"); + return (ISC_R_NOTIMPLEMENTED); + } + + result = isc_stdio_read(data + commonlen, 1, remainder, lctx->f, NULL); + if (result != ISC_R_SUCCESS) { + UNEXPECTED_ERROR("isc_stdio_read failed: %s", + isc_result_totext(result)); + return (result); + } + + isc_buffer_add(&target, (unsigned int)remainder); + header.dumptime = isc_buffer_getuint32(&target); + if (header.version == DNS_RAWFORMAT_VERSION) { + header.flags = isc_buffer_getuint32(&target); + header.sourceserial = isc_buffer_getuint32(&target); + header.lastxfrin = isc_buffer_getuint32(&target); + } + + lctx->first = false; + lctx->header = header; + + return (ISC_R_SUCCESS); +} + +static isc_result_t +openfile_raw(dns_loadctx_t *lctx, const char *master_file) { + isc_result_t result; + + result = isc_stdio_open(master_file, "rb", &lctx->f); + if (result != ISC_R_SUCCESS && result != ISC_R_FILENOTFOUND) { + UNEXPECTED_ERROR("isc_stdio_open() failed: %s", + isc_result_totext(result)); + } + + return (result); +} + +static isc_result_t +load_raw(dns_loadctx_t *lctx) { + isc_result_t result = ISC_R_SUCCESS; + bool done = false; + unsigned int loop_cnt = 0; + dns_rdatacallbacks_t *callbacks; + unsigned char namebuf[DNS_NAME_MAXWIRE]; + dns_fixedname_t fixed; + dns_name_t *name; + rdatalist_head_t head, dummy; + dns_rdatalist_t rdatalist; + isc_mem_t *mctx = lctx->mctx; + dns_rdata_t *rdata = NULL; + unsigned int rdata_size = 0; + int target_size = TSIZ; + isc_buffer_t target, buf; + unsigned char *target_mem = NULL; + dns_decompress_t dctx; + + callbacks = lctx->callbacks; + dns_decompress_init(&dctx, -1, DNS_DECOMPRESS_NONE); + + if (lctx->first) { + result = load_header(lctx); + if (result != ISC_R_SUCCESS) { + return (result); + } + } + + ISC_LIST_INIT(head); + ISC_LIST_INIT(dummy); + + /* + * Allocate target_size of buffer space. This is greater than twice + * the maximum individual RR data size. + */ + target_mem = isc_mem_get(mctx, target_size); + isc_buffer_init(&target, target_mem, target_size); + + name = dns_fixedname_initname(&fixed); + + /* + * In the following loop, we regard any error fatal regardless of + * whether "MANYERRORS" is set in the context option. This is because + * normal errors should already have been checked at creation time. + * Besides, it is very unlikely that we can recover from an error + * in this format, and so trying to continue parsing erroneous data + * does not really make sense. + */ + for (loop_cnt = 0; (lctx->loop_cnt == 0 || loop_cnt < lctx->loop_cnt); + loop_cnt++) + { + unsigned int i, rdcount; + uint16_t namelen; + uint32_t totallen; + size_t minlen, readlen; + bool sequential_read = false; + + /* Read the data length */ + isc_buffer_clear(&target); + INSIST(isc_buffer_availablelength(&target) >= sizeof(totallen)); + result = isc_stdio_read(target.base, 1, sizeof(totallen), + lctx->f, NULL); + if (result == ISC_R_EOF) { + result = ISC_R_SUCCESS; + done = true; + break; + } + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + isc_buffer_add(&target, sizeof(totallen)); + totallen = isc_buffer_getuint32(&target); + + /* + * Validation: the input data must at least contain the common + * header. + */ + minlen = sizeof(totallen) + sizeof(uint16_t) + + sizeof(uint16_t) + sizeof(uint16_t) + + sizeof(uint32_t) + sizeof(uint32_t); + if (totallen < minlen) { + result = ISC_R_RANGE; + goto cleanup; + } + totallen -= sizeof(totallen); + + isc_buffer_clear(&target); + if (totallen > isc_buffer_availablelength(&target)) { + /* + * The default buffer size should typically be large + * enough to store the entire RRset. We could try to + * allocate enough space if this is not the case, but + * it might cause a hazardous result when "totallen" + * is forged. Thus, we'd rather take an inefficient + * but robust approach in this atypical case: read + * data step by step, and commit partial data when + * necessary. Note that the buffer must be large + * enough to store the "header part", owner name, and + * at least one rdata (however large it is). + */ + sequential_read = true; + readlen = minlen - sizeof(totallen); + } else { + /* + * Typical case. We can read the whole RRset at once + * with the default buffer. + */ + readlen = totallen; + } + result = isc_stdio_read(target.base, 1, readlen, lctx->f, NULL); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + isc_buffer_add(&target, (unsigned int)readlen); + totallen -= (uint32_t)readlen; + + /* Construct RRset headers */ + dns_rdatalist_init(&rdatalist); + rdatalist.rdclass = isc_buffer_getuint16(&target); + if (lctx->zclass != rdatalist.rdclass) { + result = DNS_R_BADCLASS; + goto cleanup; + } + rdatalist.type = isc_buffer_getuint16(&target); + rdatalist.covers = isc_buffer_getuint16(&target); + rdatalist.ttl = isc_buffer_getuint32(&target); + rdcount = isc_buffer_getuint32(&target); + if (rdcount == 0 || rdcount > 0xffff) { + result = ISC_R_RANGE; + goto cleanup; + } + INSIST(isc_buffer_consumedlength(&target) <= readlen); + + /* Owner name: length followed by name */ + result = read_and_check(sequential_read, &target, + sizeof(namelen), lctx->f, &totallen); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + namelen = isc_buffer_getuint16(&target); + if (namelen > sizeof(namebuf)) { + result = ISC_R_RANGE; + goto cleanup; + } + + result = read_and_check(sequential_read, &target, namelen, + lctx->f, &totallen); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + + isc_buffer_setactive(&target, (unsigned int)namelen); + result = dns_name_fromwire(name, &target, &dctx, 0, NULL); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + + if ((lctx->options & DNS_MASTER_CHECKTTL) != 0 && + rdatalist.ttl > lctx->maxttl) + { + (callbacks->error)(callbacks, + "dns_master_load: " + "TTL %d exceeds configured " + "max-zone-ttl %d", + rdatalist.ttl, lctx->maxttl); + result = ISC_R_RANGE; + goto cleanup; + } + + /* Rdata contents. */ + if (rdcount > rdata_size) { + dns_rdata_t *new_rdata = NULL; + + new_rdata = grow_rdata(rdcount + RDSZ, rdata, + rdata_size, &head, &dummy, mctx); + if (new_rdata == NULL) { + result = ISC_R_NOMEMORY; + goto cleanup; + } + rdata_size = rdcount + RDSZ; + rdata = new_rdata; + } + + continue_read: + for (i = 0; i < rdcount; i++) { + uint16_t rdlen; + + dns_rdata_init(&rdata[i]); + + if (sequential_read && + isc_buffer_availablelength(&target) < MINTSIZ) + { + unsigned int j; + + INSIST(i > 0); /* detect an infinite loop */ + + /* Partial Commit. */ + ISC_LIST_APPEND(head, &rdatalist, link); + result = commit(callbacks, lctx, &head, name, + NULL, 0); + for (j = 0; j < i; j++) { + ISC_LIST_UNLINK(rdatalist.rdata, + &rdata[j], link); + dns_rdata_reset(&rdata[j]); + } + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + + /* Rewind the buffer and continue */ + isc_buffer_clear(&target); + + rdcount -= i; + + goto continue_read; + } + + /* rdata length */ + result = read_and_check(sequential_read, &target, + sizeof(rdlen), lctx->f, + &totallen); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + rdlen = isc_buffer_getuint16(&target); + + /* rdata */ + result = read_and_check(sequential_read, &target, rdlen, + lctx->f, &totallen); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + isc_buffer_setactive(&target, (unsigned int)rdlen); + /* + * It is safe to have the source active region and + * the target available region be the same if + * decompression is disabled (see dctx above) and we + * are not downcasing names (options == 0). + */ + isc_buffer_init(&buf, isc_buffer_current(&target), + (unsigned int)rdlen); + result = dns_rdata_fromwire( + &rdata[i], rdatalist.rdclass, rdatalist.type, + &target, &dctx, 0, &buf); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + ISC_LIST_APPEND(rdatalist.rdata, &rdata[i], link); + } + + /* + * Sanity check. Still having remaining space is not + * necessarily critical, but it very likely indicates broken + * or malformed data. + */ + if (isc_buffer_remaininglength(&target) != 0 || totallen != 0) { + result = ISC_R_RANGE; + goto cleanup; + } + + ISC_LIST_APPEND(head, &rdatalist, link); + + /* Commit this RRset. rdatalist will be unlinked. */ + result = commit(callbacks, lctx, &head, name, NULL, 0); + + for (i = 0; i < rdcount; i++) { + ISC_LIST_UNLINK(rdatalist.rdata, &rdata[i], link); + dns_rdata_reset(&rdata[i]); + } + + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + } + + if (!done) { + INSIST(lctx->done != NULL && lctx->task != NULL); + result = DNS_R_CONTINUE; + } else if (result == ISC_R_SUCCESS && lctx->result != ISC_R_SUCCESS) { + result = lctx->result; + } + + if (result == ISC_R_SUCCESS && callbacks->rawdata != NULL) { + (*callbacks->rawdata)(callbacks->zone, &lctx->header); + } + +cleanup: + if (rdata != NULL) { + isc_mem_put(mctx, rdata, rdata_size * sizeof(*rdata)); + } + if (target_mem != NULL) { + isc_mem_put(mctx, target_mem, target_size); + } + if (result != ISC_R_SUCCESS && result != DNS_R_CONTINUE) { + (*callbacks->error)(callbacks, "dns_master_load: %s", + isc_result_totext(result)); + } + + return (result); +} + +isc_result_t +dns_master_loadfile(const char *master_file, dns_name_t *top, + dns_name_t *origin, dns_rdataclass_t zclass, + unsigned int options, uint32_t resign, + dns_rdatacallbacks_t *callbacks, + dns_masterincludecb_t include_cb, void *include_arg, + isc_mem_t *mctx, dns_masterformat_t format, + dns_ttl_t maxttl) { + dns_loadctx_t *lctx = NULL; + isc_result_t result; + + result = loadctx_create(format, mctx, options, resign, top, zclass, + origin, callbacks, NULL, NULL, NULL, include_cb, + include_arg, NULL, &lctx); + if (result != ISC_R_SUCCESS) { + return (result); + } + + lctx->maxttl = maxttl; + + result = (lctx->openfile)(lctx, master_file); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + + result = (lctx->load)(lctx); + INSIST(result != DNS_R_CONTINUE); + +cleanup: + dns_loadctx_detach(&lctx); + return (result); +} + +isc_result_t +dns_master_loadfileinc(const char *master_file, dns_name_t *top, + dns_name_t *origin, dns_rdataclass_t zclass, + unsigned int options, uint32_t resign, + dns_rdatacallbacks_t *callbacks, isc_task_t *task, + dns_loaddonefunc_t done, void *done_arg, + dns_loadctx_t **lctxp, dns_masterincludecb_t include_cb, + void *include_arg, isc_mem_t *mctx, + dns_masterformat_t format, uint32_t maxttl) { + dns_loadctx_t *lctx = NULL; + isc_result_t result; + + REQUIRE(task != NULL); + REQUIRE(done != NULL); + + result = loadctx_create(format, mctx, options, resign, top, zclass, + origin, callbacks, task, done, done_arg, + include_cb, include_arg, NULL, &lctx); + if (result != ISC_R_SUCCESS) { + return (result); + } + + lctx->maxttl = maxttl; + + result = (lctx->openfile)(lctx, master_file); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + + result = task_send(lctx); + if (result == ISC_R_SUCCESS) { + dns_loadctx_attach(lctx, lctxp); + return (DNS_R_CONTINUE); + } + +cleanup: + dns_loadctx_detach(&lctx); + return (result); +} + +isc_result_t +dns_master_loadstream(FILE *stream, dns_name_t *top, dns_name_t *origin, + dns_rdataclass_t zclass, unsigned int options, + dns_rdatacallbacks_t *callbacks, isc_mem_t *mctx) { + isc_result_t result; + dns_loadctx_t *lctx = NULL; + + REQUIRE(stream != NULL); + + result = loadctx_create(dns_masterformat_text, mctx, options, 0, top, + zclass, origin, callbacks, NULL, NULL, NULL, + NULL, NULL, NULL, &lctx); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + + result = isc_lex_openstream(lctx->lex, stream); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + + result = (lctx->load)(lctx); + INSIST(result != DNS_R_CONTINUE); + +cleanup: + if (lctx != NULL) { + dns_loadctx_detach(&lctx); + } + return (result); +} + +isc_result_t +dns_master_loadstreaminc(FILE *stream, dns_name_t *top, dns_name_t *origin, + dns_rdataclass_t zclass, unsigned int options, + dns_rdatacallbacks_t *callbacks, isc_task_t *task, + dns_loaddonefunc_t done, void *done_arg, + dns_loadctx_t **lctxp, isc_mem_t *mctx) { + isc_result_t result; + dns_loadctx_t *lctx = NULL; + + REQUIRE(stream != NULL); + REQUIRE(task != NULL); + REQUIRE(done != NULL); + + result = loadctx_create(dns_masterformat_text, mctx, options, 0, top, + zclass, origin, callbacks, task, done, done_arg, + NULL, NULL, NULL, &lctx); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + + result = isc_lex_openstream(lctx->lex, stream); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + + result = task_send(lctx); + if (result == ISC_R_SUCCESS) { + dns_loadctx_attach(lctx, lctxp); + return (DNS_R_CONTINUE); + } + +cleanup: + if (lctx != NULL) { + dns_loadctx_detach(&lctx); + } + return (result); +} + +isc_result_t +dns_master_loadbuffer(isc_buffer_t *buffer, dns_name_t *top, dns_name_t *origin, + dns_rdataclass_t zclass, unsigned int options, + dns_rdatacallbacks_t *callbacks, isc_mem_t *mctx) { + isc_result_t result; + dns_loadctx_t *lctx = NULL; + + REQUIRE(buffer != NULL); + + result = loadctx_create(dns_masterformat_text, mctx, options, 0, top, + zclass, origin, callbacks, NULL, NULL, NULL, + NULL, NULL, NULL, &lctx); + if (result != ISC_R_SUCCESS) { + return (result); + } + + result = isc_lex_openbuffer(lctx->lex, buffer); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + + result = (lctx->load)(lctx); + INSIST(result != DNS_R_CONTINUE); + +cleanup: + dns_loadctx_detach(&lctx); + return (result); +} + +isc_result_t +dns_master_loadbufferinc(isc_buffer_t *buffer, dns_name_t *top, + dns_name_t *origin, dns_rdataclass_t zclass, + unsigned int options, dns_rdatacallbacks_t *callbacks, + isc_task_t *task, dns_loaddonefunc_t done, + void *done_arg, dns_loadctx_t **lctxp, + isc_mem_t *mctx) { + isc_result_t result; + dns_loadctx_t *lctx = NULL; + + REQUIRE(buffer != NULL); + REQUIRE(task != NULL); + REQUIRE(done != NULL); + + result = loadctx_create(dns_masterformat_text, mctx, options, 0, top, + zclass, origin, callbacks, task, done, done_arg, + NULL, NULL, NULL, &lctx); + if (result != ISC_R_SUCCESS) { + return (result); + } + + result = isc_lex_openbuffer(lctx->lex, buffer); + if (result != ISC_R_SUCCESS) { + goto cleanup; + } + + result = task_send(lctx); + if (result == ISC_R_SUCCESS) { + dns_loadctx_attach(lctx, lctxp); + return (DNS_R_CONTINUE); + } + +cleanup: + dns_loadctx_detach(&lctx); + return (result); +} + +isc_result_t +dns_master_loadlexer(isc_lex_t *lex, dns_name_t *top, dns_name_t *origin, + dns_rdataclass_t zclass, unsigned int options, + dns_rdatacallbacks_t *callbacks, isc_mem_t *mctx) { + isc_result_t result; + dns_loadctx_t *lctx = NULL; + + REQUIRE(lex != NULL); + + result = loadctx_create(dns_masterformat_text, mctx, options, 0, top, + zclass, origin, callbacks, NULL, NULL, NULL, + NULL, NULL, lex, &lctx); + if (result != ISC_R_SUCCESS) { + return (result); + } + + result = (lctx->load)(lctx); + INSIST(result != DNS_R_CONTINUE); + + dns_loadctx_detach(&lctx); + return (result); +} + +isc_result_t +dns_master_loadlexerinc(isc_lex_t *lex, dns_name_t *top, dns_name_t *origin, + dns_rdataclass_t zclass, unsigned int options, + dns_rdatacallbacks_t *callbacks, isc_task_t *task, + dns_loaddonefunc_t done, void *done_arg, + dns_loadctx_t **lctxp, isc_mem_t *mctx) { + isc_result_t result; + dns_loadctx_t *lctx = NULL; + + REQUIRE(lex != NULL); + REQUIRE(task != NULL); + REQUIRE(done != NULL); + + result = loadctx_create(dns_masterformat_text, mctx, options, 0, top, + zclass, origin, callbacks, task, done, done_arg, + NULL, NULL, lex, &lctx); + if (result != ISC_R_SUCCESS) { + return (result); + } + + result = task_send(lctx); + if (result == ISC_R_SUCCESS) { + dns_loadctx_attach(lctx, lctxp); + return (DNS_R_CONTINUE); + } + + dns_loadctx_detach(&lctx); + return (result); +} + +/* + * Grow the slab of dns_rdatalist_t structures. + * Re-link glue and current list. + */ +static dns_rdatalist_t * +grow_rdatalist(int new_len, dns_rdatalist_t *oldlist, int old_len, + rdatalist_head_t *current, rdatalist_head_t *glue, + isc_mem_t *mctx) { + dns_rdatalist_t *newlist; + int rdlcount = 0; + ISC_LIST(dns_rdatalist_t) save; + dns_rdatalist_t *this; + + newlist = isc_mem_get(mctx, new_len * sizeof(*newlist)); + if (newlist == NULL) { + return (NULL); + } + + ISC_LIST_INIT(save); + while ((this = ISC_LIST_HEAD(*current)) != NULL) { + ISC_LIST_UNLINK(*current, this, link); + ISC_LIST_APPEND(save, this, link); + } + while ((this = ISC_LIST_HEAD(save)) != NULL) { + ISC_LIST_UNLINK(save, this, link); + INSIST(rdlcount < new_len); + newlist[rdlcount] = *this; + ISC_LIST_APPEND(*current, &newlist[rdlcount], link); + rdlcount++; + } + + ISC_LIST_INIT(save); + while ((this = ISC_LIST_HEAD(*glue)) != NULL) { + ISC_LIST_UNLINK(*glue, this, link); + ISC_LIST_APPEND(save, this, link); + } + while ((this = ISC_LIST_HEAD(save)) != NULL) { + ISC_LIST_UNLINK(save, this, link); + INSIST(rdlcount < new_len); + newlist[rdlcount] = *this; + ISC_LIST_APPEND(*glue, &newlist[rdlcount], link); + rdlcount++; + } + + INSIST(rdlcount == old_len); + if (oldlist != NULL) { + isc_mem_put(mctx, oldlist, old_len * sizeof(*oldlist)); + } + return (newlist); +} + +/* + * Grow the slab of rdata structs. + * Re-link the current and glue chains. + */ +static dns_rdata_t * +grow_rdata(int new_len, dns_rdata_t *oldlist, int old_len, + rdatalist_head_t *current, rdatalist_head_t *glue, isc_mem_t *mctx) { + dns_rdata_t *newlist; + int rdcount = 0; + ISC_LIST(dns_rdata_t) save; + dns_rdatalist_t *this; + dns_rdata_t *rdata; + + newlist = isc_mem_get(mctx, new_len * sizeof(*newlist)); + if (newlist == NULL) { + return (NULL); + } + memset(newlist, 0, new_len * sizeof(*newlist)); + + /* + * Copy current relinking. + */ + this = ISC_LIST_HEAD(*current); + while (this != NULL) { + ISC_LIST_INIT(save); + while ((rdata = ISC_LIST_HEAD(this->rdata)) != NULL) { + ISC_LIST_UNLINK(this->rdata, rdata, link); + ISC_LIST_APPEND(save, rdata, link); + } + while ((rdata = ISC_LIST_HEAD(save)) != NULL) { + ISC_LIST_UNLINK(save, rdata, link); + INSIST(rdcount < new_len); + newlist[rdcount] = *rdata; + ISC_LIST_APPEND(this->rdata, &newlist[rdcount], link); + rdcount++; + } + this = ISC_LIST_NEXT(this, link); + } + + /* + * Copy glue relinking. + */ + this = ISC_LIST_HEAD(*glue); + while (this != NULL) { + ISC_LIST_INIT(save); + while ((rdata = ISC_LIST_HEAD(this->rdata)) != NULL) { + ISC_LIST_UNLINK(this->rdata, rdata, link); + ISC_LIST_APPEND(save, rdata, link); + } + while ((rdata = ISC_LIST_HEAD(save)) != NULL) { + ISC_LIST_UNLINK(save, rdata, link); + INSIST(rdcount < new_len); + newlist[rdcount] = *rdata; + ISC_LIST_APPEND(this->rdata, &newlist[rdcount], link); + rdcount++; + } + this = ISC_LIST_NEXT(this, link); + } + INSIST(rdcount == old_len || rdcount == 0); + if (oldlist != NULL) { + isc_mem_put(mctx, oldlist, old_len * sizeof(*oldlist)); + } + return (newlist); +} + +static uint32_t +resign_fromlist(dns_rdatalist_t *this, dns_loadctx_t *lctx) { + dns_rdata_t *rdata; + dns_rdata_rrsig_t sig; + uint32_t when; + + rdata = ISC_LIST_HEAD(this->rdata); + INSIST(rdata != NULL); + (void)dns_rdata_tostruct(rdata, &sig, NULL); + if (isc_serial_gt(sig.timesigned, lctx->now)) { + when = lctx->now; + } else { + when = sig.timeexpire - lctx->resign; + } + + rdata = ISC_LIST_NEXT(rdata, link); + while (rdata != NULL) { + (void)dns_rdata_tostruct(rdata, &sig, NULL); + if (isc_serial_gt(sig.timesigned, lctx->now)) { + when = lctx->now; + } else if (sig.timeexpire - lctx->resign < when) { + when = sig.timeexpire - lctx->resign; + } + rdata = ISC_LIST_NEXT(rdata, link); + } + return (when); +} + +/* + * Convert each element from a rdatalist_t to rdataset then call commit. + * Unlink each element as we go. + */ + +static isc_result_t +commit(dns_rdatacallbacks_t *callbacks, dns_loadctx_t *lctx, + rdatalist_head_t *head, dns_name_t *owner, const char *source, + unsigned int line) { + dns_rdatalist_t *this; + dns_rdataset_t dataset; + isc_result_t result; + char namebuf[DNS_NAME_FORMATSIZE]; + void (*error)(struct dns_rdatacallbacks *, const char *, ...); + + this = ISC_LIST_HEAD(*head); + error = callbacks->error; + + if (this == NULL) { + return (ISC_R_SUCCESS); + } + do { + dns_rdataset_init(&dataset); + RUNTIME_CHECK(dns_rdatalist_tordataset(this, &dataset) == + ISC_R_SUCCESS); + dataset.trust = dns_trust_ultimate; + /* + * If this is a secure dynamic zone set the re-signing time. + */ + if (dataset.type == dns_rdatatype_rrsig && + (lctx->options & DNS_MASTER_RESIGN) != 0) + { + dataset.attributes |= DNS_RDATASETATTR_RESIGN; + dataset.resign = resign_fromlist(this, lctx); + } + result = ((*callbacks->add)(callbacks->add_private, owner, + &dataset)); + if (result == ISC_R_NOMEMORY) { + (*error)(callbacks, "dns_master_load: %s", + isc_result_totext(result)); + } else if (result != ISC_R_SUCCESS) { + dns_name_format(owner, namebuf, sizeof(namebuf)); + if (source != NULL) { + (*error)(callbacks, "%s: %s:%lu: %s: %s", + "dns_master_load", source, line, + namebuf, isc_result_totext(result)); + } else { + (*error)(callbacks, "%s: %s: %s", + "dns_master_load", namebuf, + isc_result_totext(result)); + } + } + if (MANYERRS(lctx, result)) { + SETRESULT(lctx, result); + } else if (result != ISC_R_SUCCESS) { + return (result); + } + ISC_LIST_UNLINK(*head, this, link); + this = ISC_LIST_HEAD(*head); + } while (this != NULL); + return (ISC_R_SUCCESS); +} + +/* + * Returns true if one of the NS rdata's contains 'owner'. + */ + +static bool +is_glue(rdatalist_head_t *head, dns_name_t *owner) { + dns_rdatalist_t *this; + dns_rdata_t *rdata; + isc_region_t region; + dns_name_t name; + + /* + * Find NS rrset. + */ + this = ISC_LIST_HEAD(*head); + while (this != NULL) { + if (this->type == dns_rdatatype_ns) { + break; + } + this = ISC_LIST_NEXT(this, link); + } + if (this == NULL) { + return (false); + } + + rdata = ISC_LIST_HEAD(this->rdata); + while (rdata != NULL) { + dns_name_init(&name, NULL); + dns_rdata_toregion(rdata, ®ion); + dns_name_fromregion(&name, ®ion); + if (dns_name_equal(&name, owner)) { + return (true); + } + rdata = ISC_LIST_NEXT(rdata, link); + } + return (false); +} + +static void +load_quantum(isc_task_t *task, isc_event_t *event) { + isc_result_t result; + dns_loadctx_t *lctx; + + REQUIRE(event != NULL); + lctx = event->ev_arg; + REQUIRE(DNS_LCTX_VALID(lctx)); + + if (atomic_load_acquire(&lctx->canceled)) { + result = ISC_R_CANCELED; + } else { + result = (lctx->load)(lctx); + } + if (result == DNS_R_CONTINUE) { + event->ev_arg = lctx; + isc_task_send(task, &event); + } else { + (lctx->done)(lctx->done_arg, result); + isc_event_free(&event); + dns_loadctx_detach(&lctx); + } +} + +static isc_result_t +task_send(dns_loadctx_t *lctx) { + isc_event_t *event; + + event = isc_event_allocate(lctx->mctx, NULL, DNS_EVENT_MASTERQUANTUM, + load_quantum, lctx, sizeof(*event)); + isc_task_send(lctx->task, &event); + return (ISC_R_SUCCESS); +} + +void +dns_loadctx_cancel(dns_loadctx_t *lctx) { + REQUIRE(DNS_LCTX_VALID(lctx)); + + atomic_store_release(&lctx->canceled, true); +} + +void +dns_master_initrawheader(dns_masterrawheader_t *header) { + memset(header, 0, sizeof(dns_masterrawheader_t)); +} |