2 * Copyright (C) 2004-2011 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.
24 #include <isc/buffer.h>
27 #include <isc/parseint.h>
28 #include <isc/region.h>
29 #include <isc/result.h>
30 #include <isc/sockaddr.h>
31 #include <isc/string.h>
34 #include <isccfg/namedconf.h>
36 #include <dns/fixedname.h>
38 #include <dns/rdataclass.h>
39 #include <dns/rdatatype.h>
45 #include <named/config.h>
46 #include <named/globals.h>
48 #include "bind.keys.h"
50 /*% default configuration */
51 static char defaultconf[] = "\
53 # blackhole {none;};\n"
55 " coresize default;\n\
60 "# session-keyfile \"" NS_LOCALSTATEDIR "/run/named/session.key\";\n\
61 session-keyname local-ddns;\n\
62 session-keyalg hmac-sha256;\n\
63 deallocate-on-exit true;\n\
65 dump-file \"named_dump.db\";\n\
67 has-old-clients false;\n\
68 heartbeat-interval 60;\n\
69 host-statistics no;\n\
70 interface-interval 60;\n\
72 listen-on-v6 {none;};\n\
73 match-mapped-addresses no;\n\
74 memstatistics-file \"named.memstats\";\n\
75 multiple-cnames no;\n\
76 # named-xfer <obsolete>;\n\
77 # pid-file \"" NS_LOCALSTATEDIR "/run/named/named.pid\"; /* or /lwresd.pid */\n\
78 bindkeys-file \"" NS_SYSCONFDIR "/bind.keys\";\n\
80 recursing-file \"named.recursing\";\n\
81 secroots-file \"named.secroots\";\n\
85 random-device \"" PATH_RANDOMDEV "\";\n\
89 recursive-clients 1000;\n\
90 resolver-query-timeout 30;\n\
91 rrset-order {type NS order random; order cyclic; };\n\
93 serial-query-rate 20;\n\
95 statistics-file \"named.stats\";\n\
96 statistics-interval 60;\n\
98 tcp-listen-queue 3;\n\
99 # tkey-dhkey <none>\n\
100 # tkey-gssapi-credential <none>\n\
101 # tkey-domain <none>\n\
102 transfers-per-ns 2;\n\
105 treat-cr-as-space true;\n\
108 edns-udp-size 4096;\n\
109 max-udp-size 4096;\n\
110 request-nsid false;\n\
111 reserved-sockets 512;\n\
114 dnssec-lookaside . trust-anchor dlv.isc.org;\n\
117 allow-notify {none;};\n\
118 allow-update-forwarding {none;};\n\
119 allow-query-cache { localnets; localhost; };\n\
120 allow-query-cache-on { any; };\n\
121 allow-recursion { localnets; localhost; };\n\
122 allow-recursion-on { any; };\n\
123 # allow-v6-synthesis <obsolete>;\n\
126 auth-nxdomain false;\n\
127 minimal-responses false;\n\
129 provide-ixfr true;\n\
130 request-ixfr true;\n\
133 additional-from-auth true;\n\
134 additional-from-cache true;\n\
135 query-source address *;\n\
136 query-source-v6 address *;\n\
138 notify-source-v6 *;\n\
139 cleaning-interval 0; /* now meaningless */\n\
142 max-ncache-ttl 10800; /* 3 hours */\n\
143 max-cache-ttl 604800; /* 1 week */\n\
144 transfer-format many-answers;\n\
146 check-names master fail;\n\
147 check-names slave warn;\n\
148 check-names response ignore;\n\
149 check-dup-records warn;\n\
152 acache-cleaning-interval 60;\n\
153 max-acache-size 16M;\n\
154 dnssec-enable yes;\n\
155 dnssec-validation yes; \n\
156 dnssec-accept-expired no;\n\
157 clients-per-query 10;\n\
158 max-clients-per-query 100;\n\
159 max-recursion-depth 7;\n\
160 max-recursion-queries 50;\n\
161 zero-no-soa-ttl-cache no;\n\
162 nsec3-test-zone no;\n\
163 allow-new-zones no;\n\
165 #ifdef ALLOW_FILTER_AAAA_ON_V4
166 " filter-aaaa-on-v4 no;\n\
167 filter-aaaa { any; };\n\
172 allow-query {any;};\n\
173 allow-query-on {any;};\n\
174 allow-transfer {any;};\n\
176 # also-notify <none>\n\
181 # forwarders <none>\n\
182 maintain-ixfr-base no;\n\
183 # max-ixfr-log-size <obsolete>\n\
184 transfer-source *;\n\
185 transfer-source-v6 *;\n\
186 alt-transfer-source *;\n\
187 alt-transfer-source-v6 *;\n\
188 max-transfer-time-in 120;\n\
189 max-transfer-time-out 120;\n\
190 max-transfer-idle-in 60;\n\
191 max-transfer-idle-out 60;\n\
192 max-retry-time 1209600; /* 2 weeks */\n\
193 min-retry-time 500;\n\
194 max-refresh-time 2419200; /* 4 weeks */\n\
195 min-refresh-time 300;\n\
197 dnssec-secure-to-insecure no;\n\
198 sig-validity-interval 30; /* days */\n\
199 sig-signing-nodes 100;\n\
200 sig-signing-signatures 10;\n\
201 sig-signing-type 65534;\n\
202 zone-statistics false;\n\
203 max-journal-size unlimited;\n\
204 ixfr-from-differences false;\n\
205 check-wildcard yes;\n\
206 check-sibling yes;\n\
207 check-integrity yes;\n\
208 check-mx-cname warn;\n\
209 check-srv-cname warn;\n\
210 zero-no-soa-ttl yes;\n\
211 update-check-ksk yes;\n\
212 dnssec-dnskey-kskonly no;\n\
213 try-tcp-refresh yes; /* BIND 8 compat */\n\
218 # Zones in the \"_bind\" view are NOT counted in the count of zones.\n\
220 view \"_bind\" chaos {\n\
223 allow-new-zones no;\n\
225 zone \"version.bind\" chaos {\n\
227 database \"_builtin version\";\n\
230 zone \"hostname.bind\" chaos {\n\
232 database \"_builtin hostname\";\n\
235 zone \"authors.bind\" chaos {\n\
237 database \"_builtin authors\";\n\
240 zone \"id.server\" chaos {\n\
242 database \"_builtin id\";\n\
247 # Default trusted key(s) for builtin DLV support\n\
248 # (used if \"dnssec-lookaside auto;\" is set and\n\
249 # sysconfdir/bind.keys doesn't exist).\n\
251 # BEGIN MANAGED KEYS\n"
253 /* Imported from bind.keys.h: */
256 "# END MANAGED KEYS\n\
260 ns_config_parsedefaults(cfg_parser_t *parser, cfg_obj_t **conf) {
263 isc_buffer_init(&b, defaultconf, sizeof(defaultconf) - 1);
264 isc_buffer_add(&b, sizeof(defaultconf) - 1);
265 return (cfg_parse_buffer(parser, &b, &cfg_type_namedconf, conf));
269 ns_config_get(const cfg_obj_t **maps, const char *name, const cfg_obj_t **obj) {
274 return (ISC_R_NOTFOUND);
275 if (cfg_map_get(maps[i], name, obj) == ISC_R_SUCCESS)
276 return (ISC_R_SUCCESS);
281 ns_checknames_get(const cfg_obj_t **maps, const char *which,
282 const cfg_obj_t **obj)
284 const cfg_listelt_t *element;
285 const cfg_obj_t *checknames;
286 const cfg_obj_t *type;
287 const cfg_obj_t *value;
292 return (ISC_R_NOTFOUND);
294 if (cfg_map_get(maps[i], "check-names", &checknames) == ISC_R_SUCCESS) {
296 * Zone map entry is not a list.
298 if (checknames != NULL && !cfg_obj_islist(checknames)) {
300 return (ISC_R_SUCCESS);
302 for (element = cfg_list_first(checknames);
304 element = cfg_list_next(element)) {
305 value = cfg_listelt_value(element);
306 type = cfg_tuple_get(value, "type");
307 if (strcasecmp(cfg_obj_asstring(type), which) == 0) {
308 *obj = cfg_tuple_get(value, "mode");
309 return (ISC_R_SUCCESS);
318 ns_config_listcount(const cfg_obj_t *list) {
319 const cfg_listelt_t *e;
322 for (e = cfg_list_first(list); e != NULL; e = cfg_list_next(e))
329 ns_config_getclass(const cfg_obj_t *classobj, dns_rdataclass_t defclass,
330 dns_rdataclass_t *classp) {
334 if (!cfg_obj_isstring(classobj)) {
336 return (ISC_R_SUCCESS);
338 DE_CONST(cfg_obj_asstring(classobj), r.base);
339 r.length = strlen(r.base);
340 result = dns_rdataclass_fromtext(classp, &r);
341 if (result != ISC_R_SUCCESS)
342 cfg_obj_log(classobj, ns_g_lctx, ISC_LOG_ERROR,
343 "unknown class '%s'", r.base);
348 ns_config_gettype(const cfg_obj_t *typeobj, dns_rdatatype_t deftype,
349 dns_rdatatype_t *typep) {
353 if (!cfg_obj_isstring(typeobj)) {
355 return (ISC_R_SUCCESS);
357 DE_CONST(cfg_obj_asstring(typeobj), r.base);
358 r.length = strlen(r.base);
359 result = dns_rdatatype_fromtext(typep, &r);
360 if (result != ISC_R_SUCCESS)
361 cfg_obj_log(typeobj, ns_g_lctx, ISC_LOG_ERROR,
362 "unknown type '%s'", r.base);
367 ns_config_getzonetype(const cfg_obj_t *zonetypeobj) {
368 dns_zonetype_t ztype = dns_zone_none;
371 str = cfg_obj_asstring(zonetypeobj);
372 if (strcasecmp(str, "master") == 0)
373 ztype = dns_zone_master;
374 else if (strcasecmp(str, "slave") == 0)
375 ztype = dns_zone_slave;
376 else if (strcasecmp(str, "stub") == 0)
377 ztype = dns_zone_stub;
378 else if (strcasecmp(str, "static-stub") == 0)
379 ztype = dns_zone_staticstub;
386 ns_config_getiplist(const cfg_obj_t *config, const cfg_obj_t *list,
387 in_port_t defport, isc_mem_t *mctx,
388 isc_sockaddr_t **addrsp, isc_uint32_t *countp)
391 const cfg_obj_t *addrlist;
392 const cfg_obj_t *portobj;
393 const cfg_listelt_t *element;
394 isc_sockaddr_t *addrs;
398 INSIST(addrsp != NULL && *addrsp == NULL);
399 INSIST(countp != NULL);
401 addrlist = cfg_tuple_get(list, "addresses");
402 count = ns_config_listcount(addrlist);
404 portobj = cfg_tuple_get(list, "port");
405 if (cfg_obj_isuint32(portobj)) {
406 isc_uint32_t val = cfg_obj_asuint32(portobj);
407 if (val > ISC_UINT16_MAX) {
408 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
409 "port '%u' out of range", val);
410 return (ISC_R_RANGE);
412 port = (in_port_t) val;
413 } else if (defport != 0)
416 result = ns_config_getport(config, &port);
417 if (result != ISC_R_SUCCESS)
421 addrs = isc_mem_get(mctx, count * sizeof(isc_sockaddr_t));
423 return (ISC_R_NOMEMORY);
425 for (element = cfg_list_first(addrlist);
427 element = cfg_list_next(element), i++)
430 addrs[i] = *cfg_obj_assockaddr(cfg_listelt_value(element));
431 if (isc_sockaddr_getport(&addrs[i]) == 0)
432 isc_sockaddr_setport(&addrs[i], port);
439 return (ISC_R_SUCCESS);
443 ns_config_putiplist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
446 INSIST(addrsp != NULL && *addrsp != NULL);
448 isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
453 get_masters_def(const cfg_obj_t *cctx, const char *name,
454 const cfg_obj_t **ret)
457 const cfg_obj_t *masters = NULL;
458 const cfg_listelt_t *elt;
460 result = cfg_map_get(cctx, "masters", &masters);
461 if (result != ISC_R_SUCCESS)
463 for (elt = cfg_list_first(masters);
465 elt = cfg_list_next(elt)) {
466 const cfg_obj_t *list;
467 const char *listname;
469 list = cfg_listelt_value(elt);
470 listname = cfg_obj_asstring(cfg_tuple_get(list, "name"));
472 if (strcasecmp(listname, name) == 0) {
474 return (ISC_R_SUCCESS);
477 return (ISC_R_NOTFOUND);
481 ns_config_getipandkeylist(const cfg_obj_t *config, const cfg_obj_t *list,
482 isc_mem_t *mctx, isc_sockaddr_t **addrsp,
483 dns_name_t ***keysp, isc_uint32_t *countp)
485 isc_uint32_t addrcount = 0, keycount = 0, i = 0;
486 isc_uint32_t listcount = 0, l = 0, j;
487 isc_uint32_t stackcount = 0, pushed = 0;
489 const cfg_listelt_t *element;
490 const cfg_obj_t *addrlist;
491 const cfg_obj_t *portobj;
493 dns_fixedname_t fname;
494 isc_sockaddr_t *addrs = NULL;
495 dns_name_t **keys = NULL;
496 struct { const char *name; } *lists = NULL;
498 const cfg_listelt_t *element;
502 REQUIRE(addrsp != NULL && *addrsp == NULL);
503 REQUIRE(keysp != NULL && *keysp == NULL);
504 REQUIRE(countp != NULL);
507 addrlist = cfg_tuple_get(list, "addresses");
508 portobj = cfg_tuple_get(list, "port");
509 if (cfg_obj_isuint32(portobj)) {
510 isc_uint32_t val = cfg_obj_asuint32(portobj);
511 if (val > ISC_UINT16_MAX) {
512 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
513 "port '%u' out of range", val);
514 result = ISC_R_RANGE;
517 port = (in_port_t) val;
519 result = ns_config_getport(config, &port);
520 if (result != ISC_R_SUCCESS)
524 result = ISC_R_NOMEMORY;
526 element = cfg_list_first(addrlist);
530 element = cfg_list_next(element))
532 const cfg_obj_t *addr;
533 const cfg_obj_t *key;
537 addr = cfg_tuple_get(cfg_listelt_value(element),
539 key = cfg_tuple_get(cfg_listelt_value(element), "key");
541 if (!cfg_obj_issockaddr(addr)) {
542 const char *listname = cfg_obj_asstring(addr);
543 isc_result_t tresult;
546 if (listcount == l) {
548 isc_uint32_t newlen = listcount + 16;
549 size_t newsize, oldsize;
551 newsize = newlen * sizeof(*lists);
552 oldsize = listcount * sizeof(*lists);
553 new = isc_mem_get(mctx, newsize);
556 if (listcount != 0) {
557 memcpy(new, lists, oldsize);
558 isc_mem_put(mctx, lists, oldsize);
564 for (j = 0; j < l; j++)
565 if (strcasecmp(lists[j].name, listname) == 0)
569 tresult = get_masters_def(config, listname, &list);
570 if (tresult == ISC_R_NOTFOUND) {
571 cfg_obj_log(addr, ns_g_lctx, ISC_LOG_ERROR,
572 "masters \"%s\" not found", listname);
577 if (tresult != ISC_R_SUCCESS)
579 lists[l++].name = listname;
581 if (stackcount == pushed) {
583 isc_uint32_t newlen = stackcount + 16;
584 size_t newsize, oldsize;
586 newsize = newlen * sizeof(*stack);
587 oldsize = stackcount * sizeof(*stack);
588 new = isc_mem_get(mctx, newsize);
591 if (stackcount != 0) {
592 memcpy(new, stack, oldsize);
593 isc_mem_put(mctx, stack, oldsize);
599 * We want to resume processing this list on the
602 stack[pushed].element = cfg_list_next(element);
603 stack[pushed].port = port;
608 if (i == addrcount) {
610 isc_uint32_t newlen = addrcount + 16;
611 size_t newsize, oldsize;
613 newsize = newlen * sizeof(isc_sockaddr_t);
614 oldsize = addrcount * sizeof(isc_sockaddr_t);
615 new = isc_mem_get(mctx, newsize);
618 if (addrcount != 0) {
619 memcpy(new, addrs, oldsize);
620 isc_mem_put(mctx, addrs, oldsize);
625 newsize = newlen * sizeof(dns_name_t *);
626 oldsize = keycount * sizeof(dns_name_t *);
627 new = isc_mem_get(mctx, newsize);
631 memcpy(new, keys, oldsize);
632 isc_mem_put(mctx, keys, oldsize);
638 addrs[i] = *cfg_obj_assockaddr(addr);
639 if (isc_sockaddr_getport(&addrs[i]) == 0)
640 isc_sockaddr_setport(&addrs[i], port);
642 if (!cfg_obj_isstring(key)) {
646 keys[i] = isc_mem_get(mctx, sizeof(dns_name_t));
649 dns_name_init(keys[i], NULL);
651 keystr = cfg_obj_asstring(key);
652 isc_buffer_init(&b, keystr, strlen(keystr));
653 isc_buffer_add(&b, strlen(keystr));
654 dns_fixedname_init(&fname);
655 result = dns_name_fromtext(dns_fixedname_name(&fname), &b,
656 dns_rootname, 0, NULL);
657 if (result != ISC_R_SUCCESS)
659 result = dns_name_dup(dns_fixedname_name(&fname), mctx,
661 if (result != ISC_R_SUCCESS)
667 element = stack[pushed].element;
668 port = stack[pushed].port;
673 size_t newsize, oldsize;
675 newsize = i * sizeof(isc_sockaddr_t);
676 oldsize = addrcount * sizeof(isc_sockaddr_t);
678 new = isc_mem_get(mctx, newsize);
681 memcpy(new, addrs, newsize);
684 isc_mem_put(mctx, addrs, oldsize);
688 newsize = i * sizeof(dns_name_t *);
689 oldsize = keycount * sizeof(dns_name_t *);
691 new = isc_mem_get(mctx, newsize);
694 memcpy(new, keys, newsize);
697 isc_mem_put(mctx, keys, oldsize);
703 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
705 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
707 INSIST(keycount == addrcount);
713 return (ISC_R_SUCCESS);
717 isc_mem_put(mctx, addrs, addrcount * sizeof(isc_sockaddr_t));
719 for (j = 0; j <= i; j++) {
722 if (dns_name_dynamic(keys[j]))
723 dns_name_free(keys[j], mctx);
724 isc_mem_put(mctx, keys[j], sizeof(dns_name_t));
726 isc_mem_put(mctx, keys, keycount * sizeof(dns_name_t *));
729 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
731 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
736 ns_config_putipandkeylist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
737 dns_name_t ***keysp, isc_uint32_t count)
740 dns_name_t **keys = *keysp;
742 INSIST(addrsp != NULL && *addrsp != NULL);
744 isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
745 for (i = 0; i < count; i++) {
748 if (dns_name_dynamic(keys[i]))
749 dns_name_free(keys[i], mctx);
750 isc_mem_put(mctx, keys[i], sizeof(dns_name_t));
752 isc_mem_put(mctx, *keysp, count * sizeof(dns_name_t *));
758 ns_config_getport(const cfg_obj_t *config, in_port_t *portp) {
759 const cfg_obj_t *maps[3];
760 const cfg_obj_t *options = NULL;
761 const cfg_obj_t *portobj = NULL;
765 (void)cfg_map_get(config, "options", &options);
769 maps[i++] = ns_g_defaults;
772 result = ns_config_get(maps, "port", &portobj);
773 INSIST(result == ISC_R_SUCCESS);
774 if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
775 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
776 "port '%u' out of range",
777 cfg_obj_asuint32(portobj));
778 return (ISC_R_RANGE);
780 *portp = (in_port_t)cfg_obj_asuint32(portobj);
781 return (ISC_R_SUCCESS);
784 struct keyalgorithms {
786 enum { hmacnone, hmacmd5, hmacsha1, hmacsha224,
787 hmacsha256, hmacsha384, hmacsha512 } hmac;
791 { "hmac-md5", hmacmd5, DST_ALG_HMACMD5, 128 },
792 { "hmac-md5.sig-alg.reg.int", hmacmd5, DST_ALG_HMACMD5, 0 },
793 { "hmac-md5.sig-alg.reg.int.", hmacmd5, DST_ALG_HMACMD5, 0 },
794 { "hmac-sha1", hmacsha1, DST_ALG_HMACSHA1, 160 },
795 { "hmac-sha224", hmacsha224, DST_ALG_HMACSHA224, 224 },
796 { "hmac-sha256", hmacsha256, DST_ALG_HMACSHA256, 256 },
797 { "hmac-sha384", hmacsha384, DST_ALG_HMACSHA384, 384 },
798 { "hmac-sha512", hmacsha512, DST_ALG_HMACSHA512, 512 },
799 { NULL, hmacnone, DST_ALG_UNKNOWN, 0 }
803 ns_config_getkeyalgorithm(const char *str, dns_name_t **name,
804 isc_uint16_t *digestbits)
806 return (ns_config_getkeyalgorithm2(str, name, NULL, digestbits));
810 ns_config_getkeyalgorithm2(const char *str, dns_name_t **name,
811 unsigned int *typep, isc_uint16_t *digestbits)
818 for (i = 0; algorithms[i].str != NULL; i++) {
819 len = strlen(algorithms[i].str);
820 if (strncasecmp(algorithms[i].str, str, len) == 0 &&
822 (algorithms[i].size != 0 && str[len] == '-')))
825 if (algorithms[i].str == NULL)
826 return (ISC_R_NOTFOUND);
827 if (str[len] == '-') {
828 result = isc_parse_uint16(&bits, str + len + 1, 10);
829 if (result != ISC_R_SUCCESS)
831 if (bits > algorithms[i].size)
832 return (ISC_R_RANGE);
833 } else if (algorithms[i].size == 0)
836 bits = algorithms[i].size;
839 switch (algorithms[i].hmac) {
840 case hmacmd5: *name = dns_tsig_hmacmd5_name; break;
841 case hmacsha1: *name = dns_tsig_hmacsha1_name; break;
842 case hmacsha224: *name = dns_tsig_hmacsha224_name; break;
843 case hmacsha256: *name = dns_tsig_hmacsha256_name; break;
844 case hmacsha384: *name = dns_tsig_hmacsha384_name; break;
845 case hmacsha512: *name = dns_tsig_hmacsha512_name; break;
851 *typep = algorithms[i].type;
852 if (digestbits != NULL)
854 return (ISC_R_SUCCESS);