2 * Copyright (C) 2004-2007 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 1.47.18.32 2007/09/13 05:04:01 each 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\
104 allow-notify {none;};\n\
105 allow-update-forwarding {none;};\n\
106 allow-query-cache { localnets; localhost; };\n\
107 allow-recursion { localnets; localhost; };\n\
108 # allow-v6-synthesis <obsolete>;\n\
111 auth-nxdomain false;\n\
112 minimal-responses false;\n\
114 provide-ixfr true;\n\
115 request-ixfr true;\n\
118 additional-from-auth true;\n\
119 additional-from-cache true;\n\
120 query-source address *;\n\
121 query-source-v6 address *;\n\
123 notify-source-v6 *;\n\
124 cleaning-interval 60;\n\
127 max-ncache-ttl 10800; /* 3 hours */\n\
128 max-cache-ttl 604800; /* 1 week */\n\
129 transfer-format many-answers;\n\
131 check-names master fail;\n\
132 check-names slave warn;\n\
133 check-names response ignore;\n\
136 acache-cleaning-interval 60;\n\
137 max-acache-size 0;\n\
138 dnssec-enable yes;\n\
139 dnssec-validation no; /* Make yes for 9.5. */ \n\
140 dnssec-accept-expired no;\n\
141 clients-per-query 10;\n\
142 max-clients-per-query 100;\n\
143 zero-no-soa-ttl-cache no;\n\
147 allow-query {any;};\n\
148 allow-transfer {any;};\n\
150 # also-notify <none>\n\
154 # forwarders <none>\n\
155 maintain-ixfr-base no;\n\
156 # max-ixfr-log-size <obsolete>\n\
157 transfer-source *;\n\
158 transfer-source-v6 *;\n\
159 alt-transfer-source *;\n\
160 alt-transfer-source-v6 *;\n\
161 max-transfer-time-in 120;\n\
162 max-transfer-time-out 120;\n\
163 max-transfer-idle-in 60;\n\
164 max-transfer-idle-out 60;\n\
165 max-retry-time 1209600; /* 2 weeks */\n\
166 min-retry-time 500;\n\
167 max-refresh-time 2419200; /* 4 weeks */\n\
168 min-refresh-time 300;\n\
170 sig-validity-interval 30; /* days */\n\
171 zone-statistics false;\n\
172 max-journal-size unlimited;\n\
173 ixfr-from-differences false;\n\
174 check-wildcard yes;\n\
175 check-sibling yes;\n\
176 check-integrity yes;\n\
177 check-mx-cname warn;\n\
178 check-srv-cname warn;\n\
179 zero-no-soa-ttl yes;\n\
180 update-check-ksk yes;\n\
185 # Zones in the \"_bind\" view are NOT counted in the count of zones.\n\
187 view \"_bind\" chaos {\n\
191 zone \"version.bind\" chaos {\n\
193 database \"_builtin version\";\n\
196 zone \"hostname.bind\" chaos {\n\
198 database \"_builtin hostname\";\n\
201 zone \"authors.bind\" chaos {\n\
203 database \"_builtin authors\";\n\
205 zone \"id.server\" chaos {\n\
207 database \"_builtin id\";\n\
213 ns_config_parsedefaults(cfg_parser_t *parser, cfg_obj_t **conf) {
216 isc_buffer_init(&b, defaultconf, sizeof(defaultconf) - 1);
217 isc_buffer_add(&b, sizeof(defaultconf) - 1);
218 return (cfg_parse_buffer(parser, &b, &cfg_type_namedconf, conf));
222 ns_config_get(const cfg_obj_t **maps, const char *name, const cfg_obj_t **obj) {
227 return (ISC_R_NOTFOUND);
228 if (cfg_map_get(maps[i], name, obj) == ISC_R_SUCCESS)
229 return (ISC_R_SUCCESS);
234 ns_checknames_get(const cfg_obj_t **maps, const char *which,
235 const cfg_obj_t **obj)
237 const cfg_listelt_t *element;
238 const cfg_obj_t *checknames;
239 const cfg_obj_t *type;
240 const cfg_obj_t *value;
245 return (ISC_R_NOTFOUND);
247 if (cfg_map_get(maps[i], "check-names", &checknames) == ISC_R_SUCCESS) {
249 * Zone map entry is not a list.
251 if (checknames != NULL && !cfg_obj_islist(checknames)) {
253 return (ISC_R_SUCCESS);
255 for (element = cfg_list_first(checknames);
257 element = cfg_list_next(element)) {
258 value = cfg_listelt_value(element);
259 type = cfg_tuple_get(value, "type");
260 if (strcasecmp(cfg_obj_asstring(type), which) == 0) {
261 *obj = cfg_tuple_get(value, "mode");
262 return (ISC_R_SUCCESS);
271 ns_config_listcount(const cfg_obj_t *list) {
272 const cfg_listelt_t *e;
275 for (e = cfg_list_first(list); e != NULL; e = cfg_list_next(e))
282 ns_config_getclass(const cfg_obj_t *classobj, dns_rdataclass_t defclass,
283 dns_rdataclass_t *classp) {
287 if (!cfg_obj_isstring(classobj)) {
289 return (ISC_R_SUCCESS);
291 DE_CONST(cfg_obj_asstring(classobj), r.base);
292 r.length = strlen(r.base);
293 result = dns_rdataclass_fromtext(classp, &r);
294 if (result != ISC_R_SUCCESS)
295 cfg_obj_log(classobj, ns_g_lctx, ISC_LOG_ERROR,
296 "unknown class '%s'", r.base);
301 ns_config_gettype(const cfg_obj_t *typeobj, dns_rdatatype_t deftype,
302 dns_rdatatype_t *typep) {
306 if (!cfg_obj_isstring(typeobj)) {
308 return (ISC_R_SUCCESS);
310 DE_CONST(cfg_obj_asstring(typeobj), r.base);
311 r.length = strlen(r.base);
312 result = dns_rdatatype_fromtext(typep, &r);
313 if (result != ISC_R_SUCCESS)
314 cfg_obj_log(typeobj, ns_g_lctx, ISC_LOG_ERROR,
315 "unknown type '%s'", r.base);
320 ns_config_getzonetype(const cfg_obj_t *zonetypeobj) {
321 dns_zonetype_t ztype = dns_zone_none;
324 str = cfg_obj_asstring(zonetypeobj);
325 if (strcasecmp(str, "master") == 0)
326 ztype = dns_zone_master;
327 else if (strcasecmp(str, "slave") == 0)
328 ztype = dns_zone_slave;
329 else if (strcasecmp(str, "stub") == 0)
330 ztype = dns_zone_stub;
337 ns_config_getiplist(const cfg_obj_t *config, const cfg_obj_t *list,
338 in_port_t defport, isc_mem_t *mctx,
339 isc_sockaddr_t **addrsp, isc_uint32_t *countp)
342 const cfg_obj_t *addrlist;
343 const cfg_obj_t *portobj;
344 const cfg_listelt_t *element;
345 isc_sockaddr_t *addrs;
349 INSIST(addrsp != NULL && *addrsp == NULL);
350 INSIST(countp != NULL);
352 addrlist = cfg_tuple_get(list, "addresses");
353 count = ns_config_listcount(addrlist);
355 portobj = cfg_tuple_get(list, "port");
356 if (cfg_obj_isuint32(portobj)) {
357 isc_uint32_t val = cfg_obj_asuint32(portobj);
358 if (val > ISC_UINT16_MAX) {
359 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
360 "port '%u' out of range", val);
361 return (ISC_R_RANGE);
363 port = (in_port_t) val;
364 } else if (defport != 0)
367 result = ns_config_getport(config, &port);
368 if (result != ISC_R_SUCCESS)
372 addrs = isc_mem_get(mctx, count * sizeof(isc_sockaddr_t));
374 return (ISC_R_NOMEMORY);
376 for (element = cfg_list_first(addrlist);
378 element = cfg_list_next(element), i++)
381 addrs[i] = *cfg_obj_assockaddr(cfg_listelt_value(element));
382 if (isc_sockaddr_getport(&addrs[i]) == 0)
383 isc_sockaddr_setport(&addrs[i], port);
390 return (ISC_R_SUCCESS);
394 ns_config_putiplist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
397 INSIST(addrsp != NULL && *addrsp != NULL);
399 isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
404 get_masters_def(const cfg_obj_t *cctx, const char *name,
405 const cfg_obj_t **ret)
408 const cfg_obj_t *masters = NULL;
409 const cfg_listelt_t *elt;
411 result = cfg_map_get(cctx, "masters", &masters);
412 if (result != ISC_R_SUCCESS)
414 for (elt = cfg_list_first(masters);
416 elt = cfg_list_next(elt)) {
417 const cfg_obj_t *list;
418 const char *listname;
420 list = cfg_listelt_value(elt);
421 listname = cfg_obj_asstring(cfg_tuple_get(list, "name"));
423 if (strcasecmp(listname, name) == 0) {
425 return (ISC_R_SUCCESS);
428 return (ISC_R_NOTFOUND);
432 ns_config_getipandkeylist(const cfg_obj_t *config, const cfg_obj_t *list,
433 isc_mem_t *mctx, isc_sockaddr_t **addrsp,
434 dns_name_t ***keysp, isc_uint32_t *countp)
436 isc_uint32_t addrcount = 0, keycount = 0, i = 0;
437 isc_uint32_t listcount = 0, l = 0, j;
438 isc_uint32_t stackcount = 0, pushed = 0;
440 const cfg_listelt_t *element;
441 const cfg_obj_t *addrlist;
442 const cfg_obj_t *portobj;
444 dns_fixedname_t fname;
445 isc_sockaddr_t *addrs = NULL;
446 dns_name_t **keys = NULL;
447 struct { const char *name; } *lists = NULL;
449 const cfg_listelt_t *element;
453 REQUIRE(addrsp != NULL && *addrsp == NULL);
454 REQUIRE(keysp != NULL && *keysp == NULL);
455 REQUIRE(countp != NULL);
458 addrlist = cfg_tuple_get(list, "addresses");
459 portobj = cfg_tuple_get(list, "port");
460 if (cfg_obj_isuint32(portobj)) {
461 isc_uint32_t val = cfg_obj_asuint32(portobj);
462 if (val > ISC_UINT16_MAX) {
463 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
464 "port '%u' out of range", val);
465 result = ISC_R_RANGE;
468 port = (in_port_t) val;
470 result = ns_config_getport(config, &port);
471 if (result != ISC_R_SUCCESS)
475 result = ISC_R_NOMEMORY;
477 element = cfg_list_first(addrlist);
481 element = cfg_list_next(element))
483 const cfg_obj_t *addr;
484 const cfg_obj_t *key;
488 addr = cfg_tuple_get(cfg_listelt_value(element),
490 key = cfg_tuple_get(cfg_listelt_value(element), "key");
492 if (!cfg_obj_issockaddr(addr)) {
493 const char *listname = cfg_obj_asstring(addr);
494 isc_result_t tresult;
497 if (listcount == l) {
499 isc_uint32_t newlen = listcount + 16;
500 size_t newsize, oldsize;
502 newsize = newlen * sizeof(*lists);
503 oldsize = listcount * sizeof(*lists);
504 new = isc_mem_get(mctx, newsize);
507 if (listcount != 0) {
508 memcpy(new, lists, oldsize);
509 isc_mem_put(mctx, lists, oldsize);
515 for (j = 0; j < l; j++)
516 if (strcasecmp(lists[j].name, listname) == 0)
520 tresult = get_masters_def(config, listname, &list);
521 if (tresult == ISC_R_NOTFOUND) {
522 cfg_obj_log(addr, ns_g_lctx, ISC_LOG_ERROR,
523 "masters \"%s\" not found", listname);
528 if (tresult != ISC_R_SUCCESS)
530 lists[l++].name = listname;
532 if (stackcount == pushed) {
534 isc_uint32_t newlen = stackcount + 16;
535 size_t newsize, oldsize;
537 newsize = newlen * sizeof(*stack);
538 oldsize = stackcount * sizeof(*stack);
539 new = isc_mem_get(mctx, newsize);
542 if (stackcount != 0) {
543 memcpy(new, stack, oldsize);
544 isc_mem_put(mctx, stack, oldsize);
550 * We want to resume processing this list on the
553 stack[pushed].element = cfg_list_next(element);
554 stack[pushed].port = port;
559 if (i == addrcount) {
561 isc_uint32_t newlen = addrcount + 16;
562 size_t newsize, oldsize;
564 newsize = newlen * sizeof(isc_sockaddr_t);
565 oldsize = addrcount * sizeof(isc_sockaddr_t);
566 new = isc_mem_get(mctx, newsize);
569 if (addrcount != 0) {
570 memcpy(new, addrs, oldsize);
571 isc_mem_put(mctx, addrs, oldsize);
576 newsize = newlen * sizeof(dns_name_t *);
577 oldsize = keycount * sizeof(dns_name_t *);
578 new = isc_mem_get(mctx, newsize);
582 memcpy(new, keys, oldsize);
583 isc_mem_put(mctx, keys, oldsize);
589 addrs[i] = *cfg_obj_assockaddr(addr);
590 if (isc_sockaddr_getport(&addrs[i]) == 0)
591 isc_sockaddr_setport(&addrs[i], port);
593 if (!cfg_obj_isstring(key)) {
597 keys[i] = isc_mem_get(mctx, sizeof(dns_name_t));
600 dns_name_init(keys[i], NULL);
602 keystr = cfg_obj_asstring(key);
603 isc_buffer_init(&b, keystr, strlen(keystr));
604 isc_buffer_add(&b, strlen(keystr));
605 dns_fixedname_init(&fname);
606 result = dns_name_fromtext(dns_fixedname_name(&fname), &b,
607 dns_rootname, ISC_FALSE, NULL);
608 if (result != ISC_R_SUCCESS)
610 result = dns_name_dup(dns_fixedname_name(&fname), mctx,
612 if (result != ISC_R_SUCCESS)
618 element = stack[pushed].element;
619 port = stack[pushed].port;
624 size_t newsize, oldsize;
626 newsize = i * sizeof(isc_sockaddr_t);
627 oldsize = addrcount * sizeof(isc_sockaddr_t);
629 new = isc_mem_get(mctx, newsize);
632 memcpy(new, addrs, newsize);
635 isc_mem_put(mctx, addrs, oldsize);
639 newsize = i * sizeof(dns_name_t *);
640 oldsize = keycount * sizeof(dns_name_t *);
642 new = isc_mem_get(mctx, newsize);
645 memcpy(new, keys, newsize);
648 isc_mem_put(mctx, keys, oldsize);
654 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
656 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
658 INSIST(keycount == addrcount);
664 return (ISC_R_SUCCESS);
668 isc_mem_put(mctx, addrs, addrcount * sizeof(isc_sockaddr_t));
670 for (j = 0; j <= i; j++) {
673 if (dns_name_dynamic(keys[j]))
674 dns_name_free(keys[j], mctx);
675 isc_mem_put(mctx, keys[j], sizeof(dns_name_t));
677 isc_mem_put(mctx, keys, keycount * sizeof(dns_name_t *));
680 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
682 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
687 ns_config_putipandkeylist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
688 dns_name_t ***keysp, isc_uint32_t count)
691 dns_name_t **keys = *keysp;
693 INSIST(addrsp != NULL && *addrsp != NULL);
695 isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
696 for (i = 0; i < count; i++) {
699 if (dns_name_dynamic(keys[i]))
700 dns_name_free(keys[i], mctx);
701 isc_mem_put(mctx, keys[i], sizeof(dns_name_t));
703 isc_mem_put(mctx, *keysp, count * sizeof(dns_name_t *));
709 ns_config_getport(const cfg_obj_t *config, in_port_t *portp) {
710 const cfg_obj_t *maps[3];
711 const cfg_obj_t *options = NULL;
712 const cfg_obj_t *portobj = NULL;
716 (void)cfg_map_get(config, "options", &options);
720 maps[i++] = ns_g_defaults;
723 result = ns_config_get(maps, "port", &portobj);
724 INSIST(result == ISC_R_SUCCESS);
725 if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
726 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
727 "port '%u' out of range",
728 cfg_obj_asuint32(portobj));
729 return (ISC_R_RANGE);
731 *portp = (in_port_t)cfg_obj_asuint32(portobj);
732 return (ISC_R_SUCCESS);
735 struct keyalgorithms {
737 enum { hmacnone, hmacmd5, hmacsha1, hmacsha224,
738 hmacsha256, hmacsha384, hmacsha512 } hmac;
741 { "hmac-md5", hmacmd5, 128 },
742 { "hmac-md5.sig-alg.reg.int", hmacmd5, 0 },
743 { "hmac-md5.sig-alg.reg.int.", hmacmd5, 0 },
744 { "hmac-sha1", hmacsha1, 160 },
745 { "hmac-sha224", hmacsha224, 224 },
746 { "hmac-sha256", hmacsha256, 256 },
747 { "hmac-sha384", hmacsha384, 384 },
748 { "hmac-sha512", hmacsha512, 512 },
749 { NULL, hmacnone, 0 }
753 ns_config_getkeyalgorithm(const char *str, dns_name_t **name,
754 isc_uint16_t *digestbits)
761 for (i = 0; algorithms[i].str != NULL; i++) {
762 len = strlen(algorithms[i].str);
763 if (strncasecmp(algorithms[i].str, str, len) == 0 &&
765 (algorithms[i].size != 0 && str[len] == '-')))
768 if (algorithms[i].str == NULL)
769 return (ISC_R_NOTFOUND);
770 if (str[len] == '-') {
771 result = isc_parse_uint16(&bits, str + len + 1, 10);
772 if (result != ISC_R_SUCCESS)
774 if (bits > algorithms[i].size)
775 return (ISC_R_RANGE);
776 } else if (algorithms[i].size == 0)
779 bits = algorithms[i].size;
782 switch (algorithms[i].hmac) {
783 case hmacmd5: *name = dns_tsig_hmacmd5_name; break;
784 case hmacsha1: *name = dns_tsig_hmacsha1_name; break;
785 case hmacsha224: *name = dns_tsig_hmacsha224_name; break;
786 case hmacsha256: *name = dns_tsig_hmacsha256_name; break;
787 case hmacsha384: *name = dns_tsig_hmacsha384_name; break;
788 case hmacsha512: *name = dns_tsig_hmacsha512_name; break;
793 if (digestbits != NULL)
795 return (ISC_R_SUCCESS);