/* * Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC") * Copyright (C) 1999-2003 Internet Software Consortium. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ /* $Id: master.c,v 1.166 2007/08/27 03:32:26 marka Exp $ */ /*! \file */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /*! * 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 (65535 - 12 - 1 - 2 - 2 - 4 - 2) /*% * 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) #define DNS_MASTER_BUFSZ 2048 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 specific to the text format: */ isc_lex_t *lex; isc_boolean_t keep_lex; unsigned int options; isc_boolean_t ttl_known; isc_boolean_t default_ttl_known; isc_boolean_t warn_1035; isc_boolean_t warn_tcr; isc_boolean_t warn_sigexpired; isc_boolean_t seen_include; isc_uint32_t ttl; isc_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; isc_boolean_t first; /* Which fixed buffers we are using? */ unsigned int loop_cnt; /*% records per quantum, * 0 => all. */ isc_boolean_t canceled; isc_mutex_t lock; isc_result_t result; /* locked by lock */ isc_uint32_t references; dns_incctx_t *inc; }; 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; isc_boolean_t 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 openfile_raw(dns_loadctx_t *lctx, const char *master_file); static isc_result_t load_text(dns_loadctx_t *lctx); 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 isc_boolean_t 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 GETTOKEN(lexer, options, token, eol) \ 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 = ISC_TRUE; \ 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 = ISC_TRUE; \ goto next_line; \ } else \ goto log_and_cleanup; \ } \ } while (0) #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, ISC_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 = ISC_TRUE; \ continue; \ } 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, dns_result_totext(result)); \ else LOGIT(result) #define LOGIT(result) \ if (result == ISC_R_NOMEMORY) \ (*callbacks->error)(callbacks, "dns_master_load: %s", \ dns_result_totext(result)); \ else \ (*callbacks->error)(callbacks, "%s: %s:%lu: %s", \ "dns_master_load", \ source, line, dns_result_totext(result)) static unsigned char in_addr_arpa_data[] = "\007IN-ADDR\004ARPA"; static unsigned char in_addr_arpa_offsets[] = { 0, 8, 13 }; static const dns_name_t in_addr_arpa = { DNS_NAME_MAGIC, in_addr_arpa_data, 14, 3, DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE, in_addr_arpa_offsets, NULL, {(void *)-1, (void *)-1}, {NULL, NULL} }; static unsigned char ip6_int_data[] = "\003IP6\003INT"; static unsigned char ip6_int_offsets[] = { 0, 4, 8 }; static const dns_name_t ip6_int = { DNS_NAME_MAGIC, ip6_int_data, 9, 3, DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE, ip6_int_offsets, NULL, {(void *)-1, (void *)-1}, {NULL, NULL} }; static unsigned char ip6_arpa_data[] = "\003IP6\004ARPA"; static unsigned char ip6_arpa_offsets[] = { 0, 4, 9 }; static const dns_name_t ip6_arpa = { DNS_NAME_MAGIC, ip6_arpa_data, 10, 3, DNS_NAMEATTR_READONLY | DNS_NAMEATTR_ABSOLUTE, ip6_arpa_offsets, NULL, {(void *)-1, (void *)-1}, {NULL, NULL} }; static inline isc_result_t gettoken(isc_lex_t *lex, unsigned int options, isc_token_t *token, isc_boolean_t 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 != ISC_TRUE) if (token->type == isc_tokentype_eol || token->type == isc_tokentype_eof) { (*callbacks->error)(callbacks, "dns_master_load: %s:%lu: unexpected end of %s", isc_lex_getsourcename(lex), isc_lex_getsourceline(lex), (token->type == isc_tokentype_eol) ? "line" : "file"); 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)); LOCK(&source->lock); INSIST(source->references > 0); source->references++; INSIST(source->references != 0); /* Overflow? */ UNLOCK(&source->lock); *target = source; } void dns_loadctx_detach(dns_loadctx_t **lctxp) { dns_loadctx_t *lctx; isc_boolean_t need_destroy = ISC_FALSE; REQUIRE(lctxp != NULL); lctx = *lctxp; REQUIRE(DNS_LCTX_VALID(lctx)); LOCK(&lctx->lock); INSIST(lctx->references > 0); lctx->references--; if (lctx->references == 0) need_destroy = ISC_TRUE; UNLOCK(&lctx->lock); if (need_destroy) loadctx_destroy(lctx); *lctxp = NULL; } 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) { isc_mem_t *mctx; isc_result_t result; REQUIRE(DNS_LCTX_VALID(lctx)); lctx->magic = 0; if (lctx->inc != NULL) incctx_destroy(lctx->mctx, lctx->inc); if (lctx->f != NULL) { result = isc_stdio_close(lctx->f); if (result != ISC_R_SUCCESS) { UNEXPECTED_ERROR(__FILE__, __LINE__, "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); DESTROYLOCK(&lctx->lock); mctx = NULL; isc_mem_attach(lctx->mctx, &mctx); isc_mem_detach(&lctx->mctx); isc_mem_put(mctx, lctx, sizeof(*lctx)); isc_mem_detach(&mctx); } 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)); if (ictx == NULL) return (ISC_R_NOMEMORY); for (i = 0; i < NBUFS; i++) { dns_fixedname_init(&ictx->fixed[i]); ictx->in_use[i] = ISC_FALSE; } ictx->origin_in_use = 0; ictx->origin = dns_fixedname_name(&ictx->fixed[ictx->origin_in_use]); ictx->in_use[ictx->origin_in_use] = ISC_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 = ISC_FALSE; ictx->glue_line = 0; ictx->current_line = 0; *ictxp = ictx; return (ISC_R_SUCCESS); } static isc_result_t loadctx_create(dns_masterformat_t format, isc_mem_t *mctx, unsigned int options, 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, 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)); if (lctx == NULL) return (ISC_R_NOMEMORY); result = isc_mutex_init(&lctx->lock); if (result != ISC_R_SUCCESS) { isc_mem_put(mctx, lctx, sizeof(*lctx)); return (result); } lctx->inc = NULL; result = incctx_create(mctx, origin, &lctx->inc); if (result != ISC_R_SUCCESS) goto cleanup_ctx; lctx->format = format; switch (format) { default: INSIST(0); 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; } if (lex != NULL) { lctx->lex = lex; lctx->keep_lex = ISC_TRUE; } else { lctx->lex = NULL; result = isc_lex_create(mctx, TOKENSIZ, &lctx->lex); if (result != ISC_R_SUCCESS) goto cleanup_inc; lctx->keep_lex = ISC_FALSE; memset(specials, 0, sizeof(specials)); specials['('] = 1; specials[')'] = 1; specials['"'] = 1; isc_lex_setspecials(lctx->lex, specials); isc_lex_setcomments(lctx->lex, ISC_LEXCOMMENT_DNSMASTERFILE); } lctx->ttl_known = ISC_FALSE; lctx->ttl = 0; lctx->default_ttl_known = ISC_FALSE; lctx->default_ttl = 0; lctx->warn_1035 = ISC_TRUE; /* XXX Argument? */ lctx->warn_tcr = ISC_TRUE; /* XXX Argument? */ lctx->warn_sigexpired = ISC_TRUE; /* XXX Argument? */ lctx->options = options; lctx->seen_include = ISC_FALSE; lctx->zclass = zclass; lctx->result = ISC_R_SUCCESS; dns_fixedname_init(&lctx->fixed_top); lctx->top = dns_fixedname_name(&lctx->fixed_top); dns_name_toregion(top, &r); dns_name_fromregion(lctx->top, &r); lctx->f = NULL; lctx->first = ISC_TRUE; 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; lctx->canceled = ISC_FALSE; lctx->mctx = NULL; isc_mem_attach(mctx, &lctx->mctx); 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 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]; int delta = 0; isc_textregion_t r; unsigned int n; unsigned int width; r.base = buffer; r.length = 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; } strcpy(fmt, "%d"); /* Get format specifier. */ if (*name == '{' ) { n = sscanf(name, "{%d,%u,%1[doxX]}", &delta, &width, mode); switch (n) { case 1: break; case 2: n = snprintf(fmt, sizeof(fmt), "%%0%ud", width); break; case 3: n = snprintf(fmt, sizeof(fmt), "%%0%u%c", width, mode[0]); break; default: return (DNS_R_SYNTAX); } if (n >= sizeof(fmt)) return (ISC_R_NOSPACE); /* Skip past closing brace. */ while (*name != '\0' && *name++ != '}') continue; } 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 openfile_text(dns_loadctx_t *lctx, const char *master_file) { return (isc_lex_openfile(lctx->lex, master_file)); } static isc_result_t openfile_raw(dns_loadctx_t *lctx, const char *master_file) { isc_result_t result; result = isc_stdio_open(master_file, "r", &lctx->f); if (result != ISC_R_SUCCESS && result != ISC_R_FILENOTFOUND) { UNEXPECTED_ERROR(__FILE__, __LINE__, "isc_stdio_open() failed: %s", isc_result_totext(result)); } return (result); } 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 n; 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; unsigned int start, stop, step, i; dns_incctx_t *ictx; ictx = lctx->inc; callbacks = lctx->callbacks; dns_fixedname_init(&ownerfixed); owner = dns_fixedname_name(&ownerfixed); ISC_LIST_INIT(head); target_mem = isc_mem_get(lctx->mctx, target_size); rhsbuf = isc_mem_get(lctx->mctx, DNS_MASTER_BUFSZ); lhsbuf = isc_mem_get(lctx->mctx, DNS_MASTER_BUFSZ); 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, "%u-%u/%u", &start, &stop, &step); if (n < 2 || 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; } switch (type) { case dns_rdatatype_ns: case dns_rdatatype_ptr: case dns_rdatatype_cname: case dns_rdatatype_dname: break; case dns_rdatatype_a: case dns_rdatatype_aaaa: if (lctx->zclass == dns_rdataclass_in || lctx->zclass == dns_rdataclass_ch || lctx->zclass == dns_rdataclass_hs) break; /* FALLTHROUGH */ default: (*callbacks->error)(callbacks, "%s: %s:%lu: unsupported type '%s'", "$GENERATE", source, line, gtype); result = ISC_R_NOTIMPLEMENTED; goto error_cleanup; } ISC_LIST_INIT(rdatalist.rdata); ISC_LINK_INIT(&rdatalist, link); for (i = start; i <= stop; i += step) { result = genname(lhs, i, lhsbuf, DNS_MASTER_BUFSZ); if (result != ISC_R_SUCCESS) goto error_cleanup; result = genname(rhs, i, rhsbuf, DNS_MASTER_BUFSZ); 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 ((lctx->options & DNS_MASTER_ZONE) != 0 && (lctx->options & DNS_MASTER_SLAVE) == 0 && !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; rdatalist.type = type; rdatalist.covers = 0; 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", dns_result_totext(result)); else (*callbacks->error)(callbacks, "$GENERATE: %s:%lu: %s", source, line, dns_result_totext(result)); insist_cleanup: INSIST(result != ISC_R_SUCCESS); cleanup: if (target_mem != NULL) isc_mem_put(lctx->mctx, target_mem, target_size); if (lhsbuf != NULL) isc_mem_put(lctx->mctx, lhsbuf, DNS_MASTER_BUFSZ); if (rhsbuf != NULL) isc_mem_put(lctx->mctx, rhsbuf, DNS_MASTER_BUFSZ); return (result); } static void limit_ttl(dns_rdatacallbacks_t *callbacks, const char *source, unsigned int line, isc_uint32_t *ttlp) { if (*ttlp > 0x7fffffffUL) { (callbacks->warn)(callbacks, "%s: %s:%lu: " "$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)); if (tmp == NULL) return (ISC_R_NOMEMORY); /* * Catch both "1.2.3.4" and "1.2.3.4." */ if (tmp[strlen(tmp) - 1] == '.') tmp[strlen(tmp) - 1] = '\0'; if (inet_aton(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 load_text(dns_loadctx_t *lctx) { dns_rdataclass_t rdclass; dns_rdatatype_t type, covers; isc_uint32_t ttl_offset = 0; dns_name_t *new_name; isc_boolean_t current_has_delegation = ISC_FALSE; isc_boolean_t done = ISC_FALSE; isc_boolean_t finish_origin = ISC_FALSE; isc_boolean_t finish_include = ISC_FALSE; isc_boolean_t read_till_eol = ISC_FALSE; isc_boolean_t 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; isc_boolean_t explicit_ttl; isc_stdtime_t now; 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); isc_stdtime_get(&now); /* * 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); if (target_mem == NULL) { result = ISC_R_NOMEMORY; goto log_and_cleanup; } 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 = ISC_FALSE; line = isc_lex_getsourceline(lctx->lex); GETTOKEN(lctx->lex, ISC_LEXOPT_INITIALWS | ISC_LEXOPT_QSTRING, &token, ISC_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); source = isc_lex_getsourcename(lctx->lex); ictx = lctx->inc; EXPECTEOL; continue; } done = ISC_TRUE; continue; } if (token.type == isc_tokentype_eol) { read_till_eol = ISC_FALSE; continue; /* blank line */ } if (read_till_eol) continue; if (token.type == isc_tokentype_initialws) { /* * Still working on the same name. */ initialws = ISC_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), "$ORIGIN") == 0) { GETTOKEN(lctx->lex, 0, &token, ISC_FALSE); finish_origin = ISC_TRUE; } else if (strcasecmp(DNS_AS_STR(token), "$TTL") == 0) { GETTOKEN(lctx->lex, 0, &token, ISC_FALSE); 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 = ISC_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 $DATE", "dns_master_load", source, line); result = DNS_R_SYNTAX; goto insist_and_cleanup; } GETTOKEN(lctx->lex, ISC_LEXOPT_QSTRING, &token, ISC_FALSE); if (include_file != NULL) isc_mem_free(mctx, include_file); include_file = isc_mem_strdup(mctx, DNS_AS_STR(token)); if (include_file == NULL) { result = ISC_R_NOMEMORY; goto log_and_cleanup; } GETTOKEN(lctx->lex, 0, &token, ISC_TRUE); if (token.type == isc_tokentype_eol || token.type == isc_tokentype_eof) { if (token.type == isc_tokentype_eof) WARNUNEXPECTEDEOF(lctx->lex); isc_lex_ungettoken(lctx->lex, &token); /* * No origin field. */ result = pushfile(include_file, ictx->origin, lctx); if (MANYERRS(lctx, result)) { SETRESULT(lctx, result); LOGITFILE(result, include_file); continue; } else if (result != ISC_R_SUCCESS) { LOGITFILE(result, include_file); goto insist_and_cleanup; } ictx = lctx->inc; line = isc_lex_getsourceline(lctx->lex); source = isc_lex_getsourcename(lctx->lex); continue; } /* * There is an origin field. Fall through * to domain name processing code and do * the actual inclusion later. */ finish_include = ISC_TRUE; } else if (strcasecmp(DNS_AS_STR(token), "$DATE") == 0) { isc_int64_t dump_time64; isc_stdtime_t dump_time, current_time; GETTOKEN(lctx->lex, 0, &token, ISC_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(__FILE__, __LINE__, "%s: %s:%lu: $DATE outside epoch", "dns_master_load", source, line); result = ISC_R_UNEXPECTED; goto insist_and_cleanup; } if (dump_time > current_time) { UNEXPECTED_ERROR(__FILE__, __LINE__, "%s: %s:%lu: " "$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, ISC_FALSE); range = isc_mem_strdup(mctx, DNS_AS_STR(token)); if (range == NULL) { result = ISC_R_NOMEMORY; goto log_and_cleanup; } /* LHS */ GETTOKEN(lctx->lex, 0, &token, ISC_FALSE); lhs = isc_mem_strdup(mctx, DNS_AS_STR(token)); if (lhs == NULL) { result = ISC_R_NOMEMORY; goto log_and_cleanup; } rdclass = 0; explicit_ttl = ISC_FALSE; /* CLASS? */ GETTOKEN(lctx->lex, 0, &token, ISC_FALSE); if (dns_rdataclass_fromtext(&rdclass, &token.value.as_textregion) == ISC_R_SUCCESS) { GETTOKEN(lctx->lex, 0, &token, ISC_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 = ISC_TRUE; explicit_ttl = ISC_TRUE; GETTOKEN(lctx->lex, 0, &token, ISC_FALSE); } /* CLASS? */ if (rdclass == 0 && dns_rdataclass_fromtext(&rdclass, &token.value.as_textregion) == ISC_R_SUCCESS) GETTOKEN(lctx->lex, 0, &token, ISC_FALSE); /* TYPE */ gtype = isc_mem_strdup(mctx, DNS_AS_STR(token)); if (gtype == NULL) { result = ISC_R_NOMEMORY; goto log_and_cleanup; } /* RHS */ GETTOKEN(lctx->lex, 0, &token, ISC_FALSE); rhs = isc_mem_strdup(mctx, DNS_AS_STR(token)); if (rhs == NULL) { result = ISC_R_NOMEMORY; goto log_and_cleanup; } 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 if (result != ISC_R_SUCCESS) 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 if (result != ISC_R_SUCCESS) goto insist_and_cleanup; } /* * Normal processing resumes. * * Find a free name buffer. */ for (new_in_use = 0; new_in_use < NBUFS; new_in_use++) if (!ictx->in_use[new_in_use]) break; INSIST(new_in_use < NBUFS); dns_fixedname_init(&ictx->fixed[new_in_use]); new_name = dns_fixedname_name(&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, ISC_FALSE, NULL); if (MANYERRS(lctx, result)) { SETRESULT(lctx, result); LOGIT(result); read_till_eol = ISC_TRUE; continue; } else if (result != ISC_R_SUCCESS) goto log_and_cleanup; /* * Finish $ORIGIN / $INCLUDE processing if required. */ if (finish_origin) { if (ictx->origin_in_use != -1) ictx->in_use[ictx->origin_in_use] = ISC_FALSE; ictx->origin_in_use = new_in_use; ictx->in_use[ictx->origin_in_use] = ISC_TRUE; ictx->origin = new_name; finish_origin = ISC_FALSE; EXPECTEOL; continue; } if (finish_include) { finish_include = ISC_FALSE; result = pushfile(include_file, new_name, lctx); if (MANYERRS(lctx, result)) { SETRESULT(lctx, result); LOGITFILE(result, include_file); continue; } else if (result != ISC_R_SUCCESS) { LOGITFILE(result, include_file); goto insist_and_cleanup; } ictx = lctx->inc; line = isc_lex_getsourceline(lctx->lex); source = isc_lex_getsourcename(lctx->lex); continue; } /* * "$" 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_compare(ictx->glue, new_name) != 0) { 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] = ISC_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_compare(ictx->current, new_name) != 0)) { 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] = ISC_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] = ISC_FALSE; ictx->current_in_use = new_in_use; ictx->in_use[ictx->current_in_use] = ISC_TRUE; ictx->current = new_name; current_has_delegation = ISC_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 ((lctx->options & DNS_MASTER_ZONE) != 0 && (lctx->options & DNS_MASTER_SLAVE) == 0 && !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 = ISC_TRUE; } else ictx->drop = ISC_FALSE; } else { UNEXPECTED_ERROR(__FILE__, __LINE__, "%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 if (result != ISC_R_SUCCESS) 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. * * [] [] * [] [] */ type = 0; rdclass = 0; GETTOKEN(lctx->lex, 0, &token, initialws); if (initialws) { if (token.type == isc_tokentype_eol) { read_till_eol = ISC_FALSE; continue; /* blank line */ } if (token.type == isc_tokentype_eof) { WARNUNEXPECTEDEOF(lctx->lex); read_till_eol = ISC_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 = ISC_TRUE; continue; } else if (result != ISC_R_SUCCESS) goto insist_and_cleanup; } } if (dns_rdataclass_fromtext(&rdclass, &token.value.as_textregion) == ISC_R_SUCCESS) GETTOKEN(lctx->lex, 0, &token, ISC_FALSE); explicit_ttl = ISC_FALSE; if (dns_ttl_fromtext(&token.value.as_textregion, &lctx->ttl) == ISC_R_SUCCESS) { limit_ttl(callbacks, source, line, &lctx->ttl); explicit_ttl = ISC_TRUE; lctx->ttl_known = ISC_TRUE; GETTOKEN(lctx->lex, 0, &token, ISC_FALSE); } if (token.type != isc_tokentype_string) { UNEXPECTED_ERROR(__FILE__, __LINE__, "isc_lex_gettoken() returned unexpected token type"); result = ISC_R_UNEXPECTED; if (MANYERRS(lctx, result)) { SETRESULT(lctx, result); read_till_eol = ISC_TRUE; continue; } else if (result != ISC_R_SUCCESS) goto insist_and_cleanup; } if (rdclass == 0 && dns_rdataclass_fromtext(&rdclass, &token.value.as_textregion) == ISC_R_SUCCESS) GETTOKEN(lctx->lex, 0, &token, ISC_FALSE); if (token.type != isc_tokentype_string) { UNEXPECTED_ERROR(__FILE__, __LINE__, "isc_lex_gettoken() returned unexpected token type"); result = ISC_R_UNEXPECTED; if (MANYERRS(lctx, result)) { SETRESULT(lctx, result); read_till_eol = ISC_TRUE; continue; } else if (result != ISC_R_SUCCESS) 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 = ISC_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 = ISC_TRUE; continue; } else if (result != ISC_R_SUCCESS) goto insist_and_cleanup; } if (type == dns_rdatatype_ns && ictx->glue == NULL) current_has_delegation = ISC_TRUE; /* * RFC1123: MD and MF are not allowed to be loaded from * master files. */ if ((lctx->options & DNS_MASTER_ZONE) != 0 && (lctx->options & DNS_MASTER_SLAVE) == 0 && (type == dns_rdatatype_md || type == dns_rdatatype_mf)) { char typename[DNS_RDATATYPE_FORMATSIZE]; result = DNS_R_OBSOLETE; dns_rdatatype_format(type, typename, sizeof(typename)); (*callbacks->error)(callbacks, "%s:%lu: %s '%s': %s", source, line, "type", typename, dns_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, ISC_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) { isc_boolean_t ok; dns_name_t *name; name = (ictx->glue != NULL) ? ictx->glue : ictx->current; ok = dns_rdata_checkowner(name, lctx->zclass, type, ISC_TRUE); if (!ok) { char namebuf[DNS_NAME_FORMATSIZE]; const char *desc; dns_name_format(name, namebuf, sizeof(namebuf)); result = DNS_R_BADOWNERNAME; desc = dns_result_totext(result); if ((lctx->options & DNS_MASTER_CHECKNAMESFAIL) != 0) { (*callbacks->error)(callbacks, "%s:%lu: %s: %s", source, line, namebuf, desc); if (MANYERRS(lctx, result)) { SETRESULT(lctx, result); } else if (result != ISC_R_SUCCESS) goto cleanup; } else { (*callbacks->warn)(callbacks, "%s:%lu: %s: %s", source, line, namebuf, desc); } } if (type == dns_rdatatype_ptr && (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_compare(ictx->current, lctx->top) != 0) { 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 = ISC_TRUE; target = target_ft; continue; } else if (result != ISC_R_SUCCESS) 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 = ISC_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 = ISC_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 = ISC_FALSE; } if (type == dns_rdatatype_rrsig && lctx->warn_sigexpired) { dns_rdata_rrsig_t sig; (void)dns_rdata_tostruct(&rdata[rdcount], &sig, NULL); if (isc_serial_lt(sig.timeexpire, now)) { (*callbacks->warn)(callbacks, "%s:%lu: " "signature has expired", source, line); lctx->warn_sigexpired = ISC_FALSE; } } if ((type == dns_rdatatype_sig || type == dns_rdatatype_nxt) && lctx->warn_tcr && (lctx->options & DNS_MASTER_ZONE) != 0 && (lctx->options & DNS_MASTER_SLAVE) == 0) { (*callbacks->warn)(callbacks, "%s:%lu: old style DNSSEC " " zone detected", source, line); lctx->warn_tcr = ISC_FALSE; } if ((lctx->options & DNS_MASTER_AGETTL) != 0) { /* * Adjust the TTL for $DATE. If the RR has already * expired, ignore it. */ if (lctx->ttl < ttl_offset) continue; lctx->ttl -= ttl_offset; } /* * Find type in rdatalist. * If it does not exist create new one and prepend to list * as this will mimimise 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++]; this->type = type; this->covers = covers; this->rdclass = lctx->zclass; this->ttl = lctx->ttl; ISC_LIST_INIT(this->rdata); 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; } 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 *new = NULL; isc_region_t r; int new_in_use; REQUIRE(master_file != NULL); REQUIRE(DNS_LCTX_VALID(lctx)); ictx = lctx->inc; lctx->seen_include = ISC_TRUE; result = incctx_create(lctx->mctx, origin, &new); if (result != ISC_R_SUCCESS) return (result); /* Set current domain. */ if (ictx->glue != NULL || ictx->current != NULL) { for (new_in_use = 0; new_in_use < NBUFS; new_in_use++) if (!new->in_use[new_in_use]) break; INSIST(new_in_use < NBUFS); new->current_in_use = new_in_use; new->current = dns_fixedname_name(&new->fixed[new->current_in_use]); new->in_use[new->current_in_use] = ISC_TRUE; dns_name_toregion((ictx->glue != NULL) ? ictx->glue : ictx->current, &r); dns_name_fromregion(new->current, &r); new->drop = ictx->drop; } result = (lctx->openfile)(lctx, master_file); if (result != ISC_R_SUCCESS) goto cleanup; new->parent = ictx; lctx->inc = new; return (ISC_R_SUCCESS); cleanup: if (new != NULL) incctx_destroy(lctx->mctx, new); return (result); } static inline isc_result_t read_and_check(isc_boolean_t do_read, isc_buffer_t *buffer, size_t len, FILE *f) { isc_result_t result; 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, len); } else if (isc_buffer_remaininglength(buffer) < len) return (ISC_R_RANGE); return (ISC_R_SUCCESS); } static isc_result_t load_raw(dns_loadctx_t *lctx) { isc_result_t result = ISC_R_SUCCESS; isc_boolean_t done = ISC_FALSE; unsigned int loop_cnt = 0; dns_rdatacallbacks_t *callbacks; unsigned char namebuf[DNS_NAME_MAXWIRE]; isc_region_t r; 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; unsigned char *target_mem = NULL; REQUIRE(DNS_LCTX_VALID(lctx)); callbacks = lctx->callbacks; if (lctx->first) { dns_masterrawheader_t header; isc_uint32_t format, version, dumptime; size_t hdrlen = sizeof(format) + sizeof(version) + sizeof(dumptime); INSIST(hdrlen <= sizeof(header)); isc_buffer_init(&target, &header, sizeof(header)); result = isc_stdio_read(&header, 1, hdrlen, lctx->f, NULL); if (result != ISC_R_SUCCESS) { UNEXPECTED_ERROR(__FILE__, __LINE__, "isc_stdio_read failed: %s", isc_result_totext(result)); return (result); } isc_buffer_add(&target, hdrlen); format = isc_buffer_getuint32(&target); if (format != dns_masterformat_raw) { (*callbacks->error)(callbacks, "dns_master_load: " "file format mismatch"); return (ISC_R_NOTIMPLEMENTED); } version = isc_buffer_getuint32(&target); if (version > DNS_RAWFORMAT_VERSION) { (*callbacks->error)(callbacks, "dns_master_load: " "unsupported file format version"); return (ISC_R_NOTIMPLEMENTED); } /* Empty read: currently, we do not use dumptime */ dumptime = isc_buffer_getuint32(&target); lctx->first = ISC_FALSE; } ISC_LIST_INIT(head); ISC_LIST_INIT(dummy); dns_rdatalist_init(&rdatalist); /* * 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); if (target_mem == NULL) { result = ISC_R_NOMEMORY; goto cleanup; } isc_buffer_init(&target, target_mem, target_size); /* * 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, consumed_name; isc_uint16_t namelen; isc_uint32_t totallen; size_t minlen, readlen; isc_boolean_t sequential_read = ISC_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 = ISC_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(isc_uint16_t) + sizeof(isc_uint16_t) + sizeof(isc_uint16_t) + sizeof(isc_uint32_t) + sizeof(isc_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 = ISC_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, readlen); /* Construct RRset headers */ rdatalist.rdclass = isc_buffer_getuint16(&target); 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) { 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); 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); if (result != ISC_R_SUCCESS) goto cleanup; isc_buffer_setactive(&target, (unsigned int)namelen); isc_buffer_activeregion(&target, &r); dns_name_init(&name, NULL); dns_name_fromregion(&name, &r); isc_buffer_forward(&target, (unsigned int)namelen); consumed_name = isc_buffer_consumedlength(&target); /* Rdata contents. */ if (rdcount > rdata_size) { dns_rdata_t *new_rdata = NULL; new_rdata = grow_rdata(rdata_size + RDSZ, rdata, rdata_size, &head, &dummy, mctx); if (new_rdata == NULL) { result = ISC_R_NOMEMORY; goto cleanup; } rdata_size += RDSZ; rdata = new_rdata; } continue_read: for (i = 0; i < rdcount; i++) { isc_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); isc_buffer_add(&target, consumed_name); isc_buffer_forward(&target, consumed_name); rdcount -= i; i = 0; goto continue_read; } /* rdata length */ result = read_and_check(sequential_read, &target, sizeof(rdlen), lctx->f); if (result != ISC_R_SUCCESS) goto cleanup; rdlen = isc_buffer_getuint16(&target); /* rdata */ result = read_and_check(sequential_read, &target, rdlen, lctx->f); if (result != ISC_R_SUCCESS) goto cleanup; isc_buffer_setactive(&target, (unsigned int)rdlen); isc_buffer_activeregion(&target, &r); isc_buffer_forward(&target, (unsigned int)rdlen); dns_rdata_fromregion(&rdata[i], rdatalist.rdclass, rdatalist.type, &r); 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) { 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; 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", dns_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, dns_rdatacallbacks_t *callbacks, isc_mem_t *mctx) { return (dns_master_loadfile2(master_file, top, origin, zclass, options, callbacks, mctx, dns_masterformat_text)); } isc_result_t dns_master_loadfile2(const char *master_file, dns_name_t *top, dns_name_t *origin, dns_rdataclass_t zclass, unsigned int options, dns_rdatacallbacks_t *callbacks, isc_mem_t *mctx, dns_masterformat_t format) { dns_loadctx_t *lctx = NULL; isc_result_t result; result = loadctx_create(format, mctx, options, top, zclass, origin, callbacks, NULL, NULL, NULL, NULL, &lctx); if (result != ISC_R_SUCCESS) return (result); 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, dns_rdatacallbacks_t *callbacks, isc_task_t *task, dns_loaddonefunc_t done, void *done_arg, dns_loadctx_t **lctxp, isc_mem_t *mctx) { return (dns_master_loadfileinc2(master_file, top, origin, zclass, options, callbacks, task, done, done_arg, lctxp, mctx, dns_masterformat_text)); } isc_result_t dns_master_loadfileinc2(const char *master_file, 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, dns_masterformat_t format) { dns_loadctx_t *lctx = NULL; isc_result_t result; REQUIRE(task != NULL); REQUIRE(done != NULL); result = loadctx_create(format, mctx, options, top, zclass, origin, callbacks, task, done, done_arg, NULL, &lctx); if (result != ISC_R_SUCCESS) return (result); 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, top, zclass, origin, callbacks, 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, top, zclass, origin, callbacks, task, done, done_arg, 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, top, zclass, origin, callbacks, 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, top, zclass, origin, callbacks, task, done, done_arg, 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, top, zclass, origin, callbacks, 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, top, zclass, origin, callbacks, task, done, done_arg, 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 *old, int old_len, rdatalist_head_t *current, rdatalist_head_t *glue, isc_mem_t *mctx) { dns_rdatalist_t *new; int rdlcount = 0; ISC_LIST(dns_rdatalist_t) save; dns_rdatalist_t *this; new = isc_mem_get(mctx, new_len * sizeof(*new)); if (new == NULL) return (NULL); ISC_LIST_INIT(save); this = ISC_LIST_HEAD(*current); 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); new[rdlcount] = *this; ISC_LIST_APPEND(*current, &new[rdlcount], link); rdlcount++; } ISC_LIST_INIT(save); this = ISC_LIST_HEAD(*glue); 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); new[rdlcount] = *this; ISC_LIST_APPEND(*glue, &new[rdlcount], link); rdlcount++; } INSIST(rdlcount == old_len); if (old != NULL) isc_mem_put(mctx, old, old_len * sizeof(*old)); return (new); } /* * 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 *old, int old_len, rdatalist_head_t *current, rdatalist_head_t *glue, isc_mem_t *mctx) { dns_rdata_t *new; int rdcount = 0; ISC_LIST(dns_rdata_t) save; dns_rdatalist_t *this; dns_rdata_t *rdata; new = isc_mem_get(mctx, new_len * sizeof(*new)); if (new == NULL) return (NULL); memset(new, 0, new_len * sizeof(*new)); /* * 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); new[rdcount] = *rdata; ISC_LIST_APPEND(this->rdata, &new[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); new[rdcount] = *rdata; ISC_LIST_APPEND(this->rdata, &new[rdcount], link); rdcount++; } this = ISC_LIST_NEXT(this, link); } INSIST(rdcount == old_len); if (old != NULL) isc_mem_put(mctx, old, old_len * sizeof(*old)); return (new); } /* * 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; result = ((*callbacks->add)(callbacks->add_private, owner, &dataset)); if (result == ISC_R_NOMEMORY) { (*error)(callbacks, "dns_master_load: %s", dns_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, dns_result_totext(result)); } else { (*error)(callbacks, "%s: %s: %s", "dns_master_load", namebuf, dns_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 ISC_TRUE if one of the NS rdata's contains 'owner'. */ static isc_boolean_t 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 (ISC_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_compare(&name, owner) == 0) return (ISC_TRUE); rdata = ISC_LIST_NEXT(rdata, link); } return (ISC_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 (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)); if (event == NULL) return (ISC_R_NOMEMORY); isc_task_send(lctx->task, &event); return (ISC_R_SUCCESS); } void dns_loadctx_cancel(dns_loadctx_t *lctx) { REQUIRE(DNS_LCTX_VALID(lctx)); LOCK(&lctx->lock); lctx->canceled = ISC_TRUE; UNLOCK(&lctx->lock); }