2 * Copyright (C) 2004-2008 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2001-2003 Internet Software Consortium.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
18 /* $Id: config.c,v 1.47.18.35 2008/09/04 08:03:07 marka Exp $ */
26 #include <isc/buffer.h>
29 #include <isc/parseint.h>
30 #include <isc/region.h>
31 #include <isc/result.h>
32 #include <isc/sockaddr.h>
33 #include <isc/string.h>
36 #include <isccfg/namedconf.h>
38 #include <dns/fixedname.h>
40 #include <dns/rdataclass.h>
41 #include <dns/rdatatype.h>
45 #include <named/config.h>
46 #include <named/globals.h>
48 /*% default configuration */
49 static char defaultconf[] = "\
51 # blackhole {none;};\n"
53 " coresize default;\n\
58 " deallocate-on-exit true;\n\
60 dump-file \"named_dump.db\";\n\
62 has-old-clients false;\n\
63 heartbeat-interval 60;\n\
64 host-statistics no;\n\
65 interface-interval 60;\n\
67 listen-on-v6 {none;};\n\
68 match-mapped-addresses no;\n\
69 memstatistics-file \"named.memstats\";\n\
70 multiple-cnames no;\n\
71 # named-xfer <obsolete>;\n\
72 # pid-file \"" NS_LOCALSTATEDIR "/named.pid\"; /* or /lwresd.pid */\n\
74 recursing-file \"named.recursing\";\n\
78 random-device \"" PATH_RANDOMDEV "\";\n\
82 recursive-clients 1000;\n\
83 rrset-order {type NS order random; order cyclic; };\n\
85 serial-query-rate 20;\n\
87 statistics-file \"named.stats\";\n\
88 statistics-interval 60;\n\
90 tcp-listen-queue 3;\n\
91 # tkey-dhkey <none>\n\
92 # tkey-gssapi-credential <none>\n\
93 # tkey-domain <none>\n\
94 transfers-per-ns 2;\n\
97 treat-cr-as-space true;\n\
100 edns-udp-size 4096;\n\
101 max-udp-size 4096;\n\
102 reserved-sockets 512;\n\
105 allow-notify {none;};\n\
106 allow-update-forwarding {none;};\n\
107 allow-query-cache { localnets; localhost; };\n\
108 allow-recursion { localnets; localhost; };\n\
109 # allow-v6-synthesis <obsolete>;\n\
112 auth-nxdomain false;\n\
113 minimal-responses false;\n\
115 provide-ixfr true;\n\
116 request-ixfr true;\n\
119 additional-from-auth true;\n\
120 additional-from-cache true;\n\
121 query-source address *;\n\
122 query-source-v6 address *;\n\
124 notify-source-v6 *;\n\
125 cleaning-interval 60;\n\
128 max-ncache-ttl 10800; /* 3 hours */\n\
129 max-cache-ttl 604800; /* 1 week */\n\
130 transfer-format many-answers;\n\
132 check-names master fail;\n\
133 check-names slave warn;\n\
134 check-names response ignore;\n\
137 acache-cleaning-interval 60;\n\
138 max-acache-size 0;\n\
139 dnssec-enable yes;\n\
140 dnssec-validation no; /* Make yes for 9.5. */ \n\
141 dnssec-accept-expired no;\n\
142 clients-per-query 10;\n\
143 max-clients-per-query 100;\n\
144 zero-no-soa-ttl-cache no;\n\
148 allow-query {any;};\n\
149 allow-transfer {any;};\n\
151 # also-notify <none>\n\
155 # forwarders <none>\n\
156 maintain-ixfr-base no;\n\
157 # max-ixfr-log-size <obsolete>\n\
158 transfer-source *;\n\
159 transfer-source-v6 *;\n\
160 alt-transfer-source *;\n\
161 alt-transfer-source-v6 *;\n\
162 max-transfer-time-in 120;\n\
163 max-transfer-time-out 120;\n\
164 max-transfer-idle-in 60;\n\
165 max-transfer-idle-out 60;\n\
166 max-retry-time 1209600; /* 2 weeks */\n\
167 min-retry-time 500;\n\
168 max-refresh-time 2419200; /* 4 weeks */\n\
169 min-refresh-time 300;\n\
171 sig-validity-interval 30; /* days */\n\
172 zone-statistics false;\n\
173 max-journal-size unlimited;\n\
174 ixfr-from-differences false;\n\
175 check-wildcard yes;\n\
176 check-sibling yes;\n\
177 check-integrity yes;\n\
178 check-mx-cname warn;\n\
179 check-srv-cname warn;\n\
180 zero-no-soa-ttl yes;\n\
181 update-check-ksk yes;\n\
186 # Zones in the \"_bind\" view are NOT counted in the count of zones.\n\
188 view \"_bind\" chaos {\n\
192 zone \"version.bind\" chaos {\n\
194 database \"_builtin version\";\n\
197 zone \"hostname.bind\" chaos {\n\
199 database \"_builtin hostname\";\n\
202 zone \"authors.bind\" chaos {\n\
204 database \"_builtin authors\";\n\
206 zone \"id.server\" chaos {\n\
208 database \"_builtin id\";\n\
214 ns_config_parsedefaults(cfg_parser_t *parser, cfg_obj_t **conf) {
217 isc_buffer_init(&b, defaultconf, sizeof(defaultconf) - 1);
218 isc_buffer_add(&b, sizeof(defaultconf) - 1);
219 return (cfg_parse_buffer(parser, &b, &cfg_type_namedconf, conf));
223 ns_config_get(const cfg_obj_t **maps, const char *name, const cfg_obj_t **obj) {
228 return (ISC_R_NOTFOUND);
229 if (cfg_map_get(maps[i], name, obj) == ISC_R_SUCCESS)
230 return (ISC_R_SUCCESS);
235 ns_checknames_get(const cfg_obj_t **maps, const char *which,
236 const cfg_obj_t **obj)
238 const cfg_listelt_t *element;
239 const cfg_obj_t *checknames;
240 const cfg_obj_t *type;
241 const cfg_obj_t *value;
246 return (ISC_R_NOTFOUND);
248 if (cfg_map_get(maps[i], "check-names", &checknames) == ISC_R_SUCCESS) {
250 * Zone map entry is not a list.
252 if (checknames != NULL && !cfg_obj_islist(checknames)) {
254 return (ISC_R_SUCCESS);
256 for (element = cfg_list_first(checknames);
258 element = cfg_list_next(element)) {
259 value = cfg_listelt_value(element);
260 type = cfg_tuple_get(value, "type");
261 if (strcasecmp(cfg_obj_asstring(type), which) == 0) {
262 *obj = cfg_tuple_get(value, "mode");
263 return (ISC_R_SUCCESS);
272 ns_config_listcount(const cfg_obj_t *list) {
273 const cfg_listelt_t *e;
276 for (e = cfg_list_first(list); e != NULL; e = cfg_list_next(e))
283 ns_config_getclass(const cfg_obj_t *classobj, dns_rdataclass_t defclass,
284 dns_rdataclass_t *classp) {
288 if (!cfg_obj_isstring(classobj)) {
290 return (ISC_R_SUCCESS);
292 DE_CONST(cfg_obj_asstring(classobj), r.base);
293 r.length = strlen(r.base);
294 result = dns_rdataclass_fromtext(classp, &r);
295 if (result != ISC_R_SUCCESS)
296 cfg_obj_log(classobj, ns_g_lctx, ISC_LOG_ERROR,
297 "unknown class '%s'", r.base);
302 ns_config_gettype(const cfg_obj_t *typeobj, dns_rdatatype_t deftype,
303 dns_rdatatype_t *typep) {
307 if (!cfg_obj_isstring(typeobj)) {
309 return (ISC_R_SUCCESS);
311 DE_CONST(cfg_obj_asstring(typeobj), r.base);
312 r.length = strlen(r.base);
313 result = dns_rdatatype_fromtext(typep, &r);
314 if (result != ISC_R_SUCCESS)
315 cfg_obj_log(typeobj, ns_g_lctx, ISC_LOG_ERROR,
316 "unknown type '%s'", r.base);
321 ns_config_getzonetype(const cfg_obj_t *zonetypeobj) {
322 dns_zonetype_t ztype = dns_zone_none;
325 str = cfg_obj_asstring(zonetypeobj);
326 if (strcasecmp(str, "master") == 0)
327 ztype = dns_zone_master;
328 else if (strcasecmp(str, "slave") == 0)
329 ztype = dns_zone_slave;
330 else if (strcasecmp(str, "stub") == 0)
331 ztype = dns_zone_stub;
338 ns_config_getiplist(const cfg_obj_t *config, const cfg_obj_t *list,
339 in_port_t defport, isc_mem_t *mctx,
340 isc_sockaddr_t **addrsp, isc_uint32_t *countp)
343 const cfg_obj_t *addrlist;
344 const cfg_obj_t *portobj;
345 const cfg_listelt_t *element;
346 isc_sockaddr_t *addrs;
350 INSIST(addrsp != NULL && *addrsp == NULL);
351 INSIST(countp != NULL);
353 addrlist = cfg_tuple_get(list, "addresses");
354 count = ns_config_listcount(addrlist);
356 portobj = cfg_tuple_get(list, "port");
357 if (cfg_obj_isuint32(portobj)) {
358 isc_uint32_t val = cfg_obj_asuint32(portobj);
359 if (val > ISC_UINT16_MAX) {
360 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
361 "port '%u' out of range", val);
362 return (ISC_R_RANGE);
364 port = (in_port_t) val;
365 } else if (defport != 0)
368 result = ns_config_getport(config, &port);
369 if (result != ISC_R_SUCCESS)
373 addrs = isc_mem_get(mctx, count * sizeof(isc_sockaddr_t));
375 return (ISC_R_NOMEMORY);
377 for (element = cfg_list_first(addrlist);
379 element = cfg_list_next(element), i++)
382 addrs[i] = *cfg_obj_assockaddr(cfg_listelt_value(element));
383 if (isc_sockaddr_getport(&addrs[i]) == 0)
384 isc_sockaddr_setport(&addrs[i], port);
391 return (ISC_R_SUCCESS);
395 ns_config_putiplist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
398 INSIST(addrsp != NULL && *addrsp != NULL);
400 isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
405 get_masters_def(const cfg_obj_t *cctx, const char *name,
406 const cfg_obj_t **ret)
409 const cfg_obj_t *masters = NULL;
410 const cfg_listelt_t *elt;
412 result = cfg_map_get(cctx, "masters", &masters);
413 if (result != ISC_R_SUCCESS)
415 for (elt = cfg_list_first(masters);
417 elt = cfg_list_next(elt)) {
418 const cfg_obj_t *list;
419 const char *listname;
421 list = cfg_listelt_value(elt);
422 listname = cfg_obj_asstring(cfg_tuple_get(list, "name"));
424 if (strcasecmp(listname, name) == 0) {
426 return (ISC_R_SUCCESS);
429 return (ISC_R_NOTFOUND);
433 ns_config_getipandkeylist(const cfg_obj_t *config, const cfg_obj_t *list,
434 isc_mem_t *mctx, isc_sockaddr_t **addrsp,
435 dns_name_t ***keysp, isc_uint32_t *countp)
437 isc_uint32_t addrcount = 0, keycount = 0, i = 0;
438 isc_uint32_t listcount = 0, l = 0, j;
439 isc_uint32_t stackcount = 0, pushed = 0;
441 const cfg_listelt_t *element;
442 const cfg_obj_t *addrlist;
443 const cfg_obj_t *portobj;
445 dns_fixedname_t fname;
446 isc_sockaddr_t *addrs = NULL;
447 dns_name_t **keys = NULL;
448 struct { const char *name; } *lists = NULL;
450 const cfg_listelt_t *element;
454 REQUIRE(addrsp != NULL && *addrsp == NULL);
455 REQUIRE(keysp != NULL && *keysp == NULL);
456 REQUIRE(countp != NULL);
459 addrlist = cfg_tuple_get(list, "addresses");
460 portobj = cfg_tuple_get(list, "port");
461 if (cfg_obj_isuint32(portobj)) {
462 isc_uint32_t val = cfg_obj_asuint32(portobj);
463 if (val > ISC_UINT16_MAX) {
464 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
465 "port '%u' out of range", val);
466 result = ISC_R_RANGE;
469 port = (in_port_t) val;
471 result = ns_config_getport(config, &port);
472 if (result != ISC_R_SUCCESS)
476 result = ISC_R_NOMEMORY;
478 element = cfg_list_first(addrlist);
482 element = cfg_list_next(element))
484 const cfg_obj_t *addr;
485 const cfg_obj_t *key;
489 addr = cfg_tuple_get(cfg_listelt_value(element),
491 key = cfg_tuple_get(cfg_listelt_value(element), "key");
493 if (!cfg_obj_issockaddr(addr)) {
494 const char *listname = cfg_obj_asstring(addr);
495 isc_result_t tresult;
498 if (listcount == l) {
500 isc_uint32_t newlen = listcount + 16;
501 size_t newsize, oldsize;
503 newsize = newlen * sizeof(*lists);
504 oldsize = listcount * sizeof(*lists);
505 new = isc_mem_get(mctx, newsize);
508 if (listcount != 0) {
509 memcpy(new, lists, oldsize);
510 isc_mem_put(mctx, lists, oldsize);
516 for (j = 0; j < l; j++)
517 if (strcasecmp(lists[j].name, listname) == 0)
521 tresult = get_masters_def(config, listname, &list);
522 if (tresult == ISC_R_NOTFOUND) {
523 cfg_obj_log(addr, ns_g_lctx, ISC_LOG_ERROR,
524 "masters \"%s\" not found", listname);
529 if (tresult != ISC_R_SUCCESS)
531 lists[l++].name = listname;
533 if (stackcount == pushed) {
535 isc_uint32_t newlen = stackcount + 16;
536 size_t newsize, oldsize;
538 newsize = newlen * sizeof(*stack);
539 oldsize = stackcount * sizeof(*stack);
540 new = isc_mem_get(mctx, newsize);
543 if (stackcount != 0) {
544 memcpy(new, stack, oldsize);
545 isc_mem_put(mctx, stack, oldsize);
551 * We want to resume processing this list on the
554 stack[pushed].element = cfg_list_next(element);
555 stack[pushed].port = port;
560 if (i == addrcount) {
562 isc_uint32_t newlen = addrcount + 16;
563 size_t newsize, oldsize;
565 newsize = newlen * sizeof(isc_sockaddr_t);
566 oldsize = addrcount * sizeof(isc_sockaddr_t);
567 new = isc_mem_get(mctx, newsize);
570 if (addrcount != 0) {
571 memcpy(new, addrs, oldsize);
572 isc_mem_put(mctx, addrs, oldsize);
577 newsize = newlen * sizeof(dns_name_t *);
578 oldsize = keycount * sizeof(dns_name_t *);
579 new = isc_mem_get(mctx, newsize);
583 memcpy(new, keys, oldsize);
584 isc_mem_put(mctx, keys, oldsize);
590 addrs[i] = *cfg_obj_assockaddr(addr);
591 if (isc_sockaddr_getport(&addrs[i]) == 0)
592 isc_sockaddr_setport(&addrs[i], port);
594 if (!cfg_obj_isstring(key)) {
598 keys[i] = isc_mem_get(mctx, sizeof(dns_name_t));
601 dns_name_init(keys[i], NULL);
603 keystr = cfg_obj_asstring(key);
604 isc_buffer_init(&b, keystr, strlen(keystr));
605 isc_buffer_add(&b, strlen(keystr));
606 dns_fixedname_init(&fname);
607 result = dns_name_fromtext(dns_fixedname_name(&fname), &b,
608 dns_rootname, ISC_FALSE, NULL);
609 if (result != ISC_R_SUCCESS)
611 result = dns_name_dup(dns_fixedname_name(&fname), mctx,
613 if (result != ISC_R_SUCCESS)
619 element = stack[pushed].element;
620 port = stack[pushed].port;
625 size_t newsize, oldsize;
627 newsize = i * sizeof(isc_sockaddr_t);
628 oldsize = addrcount * sizeof(isc_sockaddr_t);
630 new = isc_mem_get(mctx, newsize);
633 memcpy(new, addrs, newsize);
636 isc_mem_put(mctx, addrs, oldsize);
640 newsize = i * sizeof(dns_name_t *);
641 oldsize = keycount * sizeof(dns_name_t *);
643 new = isc_mem_get(mctx, newsize);
646 memcpy(new, keys, newsize);
649 isc_mem_put(mctx, keys, oldsize);
655 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
657 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
659 INSIST(keycount == addrcount);
665 return (ISC_R_SUCCESS);
669 isc_mem_put(mctx, addrs, addrcount * sizeof(isc_sockaddr_t));
671 for (j = 0; j <= i; j++) {
674 if (dns_name_dynamic(keys[j]))
675 dns_name_free(keys[j], mctx);
676 isc_mem_put(mctx, keys[j], sizeof(dns_name_t));
678 isc_mem_put(mctx, keys, keycount * sizeof(dns_name_t *));
681 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
683 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
688 ns_config_putipandkeylist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
689 dns_name_t ***keysp, isc_uint32_t count)
692 dns_name_t **keys = *keysp;
694 INSIST(addrsp != NULL && *addrsp != NULL);
696 isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
697 for (i = 0; i < count; i++) {
700 if (dns_name_dynamic(keys[i]))
701 dns_name_free(keys[i], mctx);
702 isc_mem_put(mctx, keys[i], sizeof(dns_name_t));
704 isc_mem_put(mctx, *keysp, count * sizeof(dns_name_t *));
710 ns_config_getport(const cfg_obj_t *config, in_port_t *portp) {
711 const cfg_obj_t *maps[3];
712 const cfg_obj_t *options = NULL;
713 const cfg_obj_t *portobj = NULL;
717 (void)cfg_map_get(config, "options", &options);
721 maps[i++] = ns_g_defaults;
724 result = ns_config_get(maps, "port", &portobj);
725 INSIST(result == ISC_R_SUCCESS);
726 if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
727 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
728 "port '%u' out of range",
729 cfg_obj_asuint32(portobj));
730 return (ISC_R_RANGE);
732 *portp = (in_port_t)cfg_obj_asuint32(portobj);
733 return (ISC_R_SUCCESS);
736 struct keyalgorithms {
738 enum { hmacnone, hmacmd5, hmacsha1, hmacsha224,
739 hmacsha256, hmacsha384, hmacsha512 } hmac;
742 { "hmac-md5", hmacmd5, 128 },
743 { "hmac-md5.sig-alg.reg.int", hmacmd5, 0 },
744 { "hmac-md5.sig-alg.reg.int.", hmacmd5, 0 },
745 { "hmac-sha1", hmacsha1, 160 },
746 { "hmac-sha224", hmacsha224, 224 },
747 { "hmac-sha256", hmacsha256, 256 },
748 { "hmac-sha384", hmacsha384, 384 },
749 { "hmac-sha512", hmacsha512, 512 },
750 { NULL, hmacnone, 0 }
754 ns_config_getkeyalgorithm(const char *str, dns_name_t **name,
755 isc_uint16_t *digestbits)
762 for (i = 0; algorithms[i].str != NULL; i++) {
763 len = strlen(algorithms[i].str);
764 if (strncasecmp(algorithms[i].str, str, len) == 0 &&
766 (algorithms[i].size != 0 && str[len] == '-')))
769 if (algorithms[i].str == NULL)
770 return (ISC_R_NOTFOUND);
771 if (str[len] == '-') {
772 result = isc_parse_uint16(&bits, str + len + 1, 10);
773 if (result != ISC_R_SUCCESS)
775 if (bits > algorithms[i].size)
776 return (ISC_R_RANGE);
777 } else if (algorithms[i].size == 0)
780 bits = algorithms[i].size;
783 switch (algorithms[i].hmac) {
784 case hmacmd5: *name = dns_tsig_hmacmd5_name; break;
785 case hmacsha1: *name = dns_tsig_hmacsha1_name; break;
786 case hmacsha224: *name = dns_tsig_hmacsha224_name; break;
787 case hmacsha256: *name = dns_tsig_hmacsha256_name; break;
788 case hmacsha384: *name = dns_tsig_hmacsha384_name; break;
789 case hmacsha512: *name = dns_tsig_hmacsha512_name; break;
794 if (digestbits != NULL)
796 return (ISC_R_SUCCESS);