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1 /*
2  * Copyright (C) 2004-2015  Internet Systems Consortium, Inc. ("ISC")
3  * Copyright (C) 2001-2003  Internet Software Consortium.
4  *
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.
8  *
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.
16  */
17
18 /*! \file */
19
20 #include <config.h>
21
22 #include <stdlib.h>
23
24 #include <isc/buffer.h>
25 #include <isc/log.h>
26 #include <isc/mem.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>
32 #include <isc/util.h>
33
34 #include <isccfg/namedconf.h>
35
36 #include <dns/fixedname.h>
37 #include <dns/name.h>
38 #include <dns/rdataclass.h>
39 #include <dns/rdatatype.h>
40 #include <dns/tsig.h>
41 #include <dns/zone.h>
42
43 #include <dst/dst.h>
44
45 #include <named/config.h>
46 #include <named/globals.h>
47
48 #include "bind.keys.h"
49
50 /*% default configuration */
51 static char defaultconf[] = "\
52 options {\n\
53 #       blackhole {none;};\n"
54 #ifndef WIN32
55 "       coresize default;\n\
56         datasize default;\n\
57         files unlimited;\n\
58         stacksize default;\n"
59 #endif
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\
64 #       directory <none>\n\
65         dump-file \"named_dump.db\";\n\
66         fake-iquery no;\n\
67         has-old-clients false;\n\
68         heartbeat-interval 60;\n\
69         host-statistics no;\n\
70         interface-interval 60;\n\
71         listen-on {any;};\n\
72         listen-on-v6 {none;};\n\
73         match-mapped-addresses no;\n\
74         max-rsa-exponent-size 0; /* no limit */\n\
75         memstatistics-file \"named.memstats\";\n\
76         multiple-cnames no;\n\
77 #       named-xfer <obsolete>;\n\
78 #       pid-file \"" NS_LOCALSTATEDIR "/run/named/named.pid\"; /* or /lwresd.pid */\n\
79         bindkeys-file \"" NS_SYSCONFDIR "/bind.keys\";\n\
80         port 53;\n\
81         recursing-file \"named.recursing\";\n\
82         secroots-file \"named.secroots\";\n\
83 "
84 #ifdef PATH_RANDOMDEV
85 "\
86         random-device \"" PATH_RANDOMDEV "\";\n\
87 "
88 #endif
89 "\
90         recursive-clients 1000;\n\
91         resolver-query-timeout 10;\n\
92         rrset-order { order random; };\n\
93         serial-queries 20;\n\
94         serial-query-rate 20;\n\
95         server-id none;\n\
96         statistics-file \"named.stats\";\n\
97         statistics-interval 60;\n\
98         tcp-clients 100;\n\
99         tcp-listen-queue 10;\n\
100 #       tkey-dhkey <none>\n\
101 #       tkey-gssapi-credential <none>\n\
102 #       tkey-domain <none>\n\
103         transfers-per-ns 2;\n\
104         transfers-in 10;\n\
105         transfers-out 10;\n\
106         treat-cr-as-space true;\n\
107         use-id-pool true;\n\
108         use-ixfr true;\n\
109         edns-udp-size 4096;\n\
110         max-udp-size 4096;\n\
111         request-nsid false;\n\
112         reserved-sockets 512;\n\
113 \n\
114         /* DLV */\n\
115         dnssec-lookaside . trust-anchor dlv.isc.org;\n\
116 \n\
117         /* view */\n\
118         allow-notify {none;};\n\
119         allow-update-forwarding {none;};\n\
120         allow-query-cache { localnets; localhost; };\n\
121         allow-query-cache-on { any; };\n\
122         allow-recursion { localnets; localhost; };\n\
123         allow-recursion-on { any; };\n\
124 #       allow-v6-synthesis <obsolete>;\n\
125 #       sortlist <none>\n\
126 #       topology <none>\n\
127         auth-nxdomain false;\n\
128         minimal-responses false;\n\
129         recursion true;\n\
130         provide-ixfr true;\n\
131         request-ixfr true;\n\
132         fetch-glue no;\n\
133         rfc2308-type1 no;\n\
134         additional-from-auth true;\n\
135         additional-from-cache true;\n\
136         query-source address *;\n\
137         query-source-v6 address *;\n\
138         notify-source *;\n\
139         notify-source-v6 *;\n\
140         cleaning-interval 0;  /* now meaningless */\n\
141         min-roots 2;\n\
142         lame-ttl 600;\n\
143         max-ncache-ttl 10800; /* 3 hours */\n\
144         max-cache-ttl 604800; /* 1 week */\n\
145         transfer-format many-answers;\n\
146         max-cache-size 0;\n\
147         check-names master fail;\n\
148         check-names slave warn;\n\
149         check-names response ignore;\n\
150         check-dup-records warn;\n\
151         check-mx warn;\n\
152         check-spf warn;\n\
153         acache-enable no;\n\
154         acache-cleaning-interval 60;\n\
155         max-acache-size 16M;\n\
156         dnssec-enable yes;\n\
157         dnssec-validation yes; \n\
158         dnssec-accept-expired no;\n\
159 "
160 #ifdef ENABLE_FETCHLIMIT
161 "       fetches-per-server 0;\n\
162         fetches-per-zone 0;\n\
163         fetch-quota-params 100 0.1 0.3 0.7;\n\
164 "
165 #endif /* ENABLE_FETCHLIMIT */
166 "       clients-per-query 10;\n\
167         max-clients-per-query 100;\n\
168         max-recursion-depth 7;\n\
169         max-recursion-queries 50;\n\
170         zero-no-soa-ttl-cache no;\n\
171         nsec3-test-zone no;\n\
172         allow-new-zones no;\n\
173 "
174 #ifdef ALLOW_FILTER_AAAA_ON_V4
175 "       filter-aaaa-on-v4 no;\n\
176         filter-aaaa { any; };\n\
177 "
178 #endif
179
180 "       /* zone */\n\
181         allow-query {any;};\n\
182         allow-query-on {any;};\n\
183         allow-transfer {any;};\n\
184         notify yes;\n\
185 #       also-notify <none>\n\
186         notify-delay 5;\n\
187         notify-to-soa no;\n\
188         dialup no;\n\
189 #       forward <none>\n\
190 #       forwarders <none>\n\
191         maintain-ixfr-base no;\n\
192 #       max-ixfr-log-size <obsolete>\n\
193         transfer-source *;\n\
194         transfer-source-v6 *;\n\
195         alt-transfer-source *;\n\
196         alt-transfer-source-v6 *;\n\
197         max-transfer-time-in 120;\n\
198         max-transfer-time-out 120;\n\
199         max-transfer-idle-in 60;\n\
200         max-transfer-idle-out 60;\n\
201         max-retry-time 1209600; /* 2 weeks */\n\
202         min-retry-time 500;\n\
203         max-refresh-time 2419200; /* 4 weeks */\n\
204         min-refresh-time 300;\n\
205         multi-master no;\n\
206         dnssec-secure-to-insecure no;\n\
207         sig-validity-interval 30; /* days */\n\
208         sig-signing-nodes 100;\n\
209         sig-signing-signatures 10;\n\
210         sig-signing-type 65534;\n\
211         inline-signing no;\n\
212         zone-statistics terse;\n\
213         max-journal-size unlimited;\n\
214         ixfr-from-differences false;\n\
215         check-wildcard yes;\n\
216         check-sibling yes;\n\
217         check-integrity yes;\n\
218         check-mx-cname warn;\n\
219         check-srv-cname warn;\n\
220         zero-no-soa-ttl yes;\n\
221         update-check-ksk yes;\n\
222         serial-update-method increment;\n\
223         dnssec-update-mode maintain;\n\
224         dnssec-dnskey-kskonly no;\n\
225         dnssec-loadkeys-interval 60;\n\
226         try-tcp-refresh yes; /* BIND 8 compat */\n\
227 };\n\
228 "
229
230 "#\n\
231 #  Zones in the \"_bind\" view are NOT counted in the count of zones.\n\
232 #\n\
233 view \"_bind\" chaos {\n\
234         recursion no;\n\
235         notify no;\n\
236         allow-new-zones no;\n\
237 "
238 #ifdef USE_RRL
239 "       # Prevent use of this zone in DNS amplified reflection DoS attacks\n\
240         rate-limit {\n\
241                 responses-per-second 3;\n\
242                 slip 0;\n\
243                 min-table-size 10;\n\
244         };\n\
245 "
246 #endif /* USE_RRL */
247 "       zone \"version.bind\" chaos {\n\
248                 type master;\n\
249                 database \"_builtin version\";\n\
250         };\n\
251 \n\
252         zone \"hostname.bind\" chaos {\n\
253                 type master;\n\
254                 database \"_builtin hostname\";\n\
255         };\n\
256 \n\
257         zone \"authors.bind\" chaos {\n\
258                 type master;\n\
259                 database \"_builtin authors\";\n\
260         };\n\
261 \n\
262         zone \"id.server\" chaos {\n\
263                 type master;\n\
264                 database \"_builtin id\";\n\
265         };\n\
266 };\n\
267 "
268 "#\n\
269 #  Default trusted key(s) for builtin DLV support\n\
270 #  (used if \"dnssec-lookaside auto;\" is set and\n\
271 #  sysconfdir/bind.keys doesn't exist).\n\
272 #\n\
273 # BEGIN MANAGED KEYS\n"
274
275 /* Imported from bind.keys.h: */
276 MANAGED_KEYS
277
278 "# END MANAGED KEYS\n\
279 ";
280
281 isc_result_t
282 ns_config_parsedefaults(cfg_parser_t *parser, cfg_obj_t **conf) {
283         isc_buffer_t b;
284
285         isc_buffer_init(&b, defaultconf, sizeof(defaultconf) - 1);
286         isc_buffer_add(&b, sizeof(defaultconf) - 1);
287         return (cfg_parse_buffer(parser, &b, &cfg_type_namedconf, conf));
288 }
289
290 isc_result_t
291 ns_config_get(const cfg_obj_t **maps, const char *name, const cfg_obj_t **obj) {
292         int i;
293
294         for (i = 0;; i++) {
295                 if (maps[i] == NULL)
296                         return (ISC_R_NOTFOUND);
297                 if (cfg_map_get(maps[i], name, obj) == ISC_R_SUCCESS)
298                         return (ISC_R_SUCCESS);
299         }
300 }
301
302 isc_result_t
303 ns_checknames_get(const cfg_obj_t **maps, const char *which,
304                   const cfg_obj_t **obj)
305 {
306         const cfg_listelt_t *element;
307         const cfg_obj_t *checknames;
308         const cfg_obj_t *type;
309         const cfg_obj_t *value;
310         int i;
311
312         for (i = 0;; i++) {
313                 if (maps[i] == NULL)
314                         return (ISC_R_NOTFOUND);
315                 checknames = NULL;
316                 if (cfg_map_get(maps[i], "check-names",
317                                 &checknames) == ISC_R_SUCCESS) {
318                         /*
319                          * Zone map entry is not a list.
320                          */
321                         if (checknames != NULL && !cfg_obj_islist(checknames)) {
322                                 *obj = checknames;
323                                 return (ISC_R_SUCCESS);
324                         }
325                         for (element = cfg_list_first(checknames);
326                              element != NULL;
327                              element = cfg_list_next(element)) {
328                                 value = cfg_listelt_value(element);
329                                 type = cfg_tuple_get(value, "type");
330                                 if (strcasecmp(cfg_obj_asstring(type),
331                                                which) == 0) {
332                                         *obj = cfg_tuple_get(value, "mode");
333                                         return (ISC_R_SUCCESS);
334                                 }
335                         }
336
337                 }
338         }
339 }
340
341 int
342 ns_config_listcount(const cfg_obj_t *list) {
343         const cfg_listelt_t *e;
344         int i = 0;
345
346         for (e = cfg_list_first(list); e != NULL; e = cfg_list_next(e))
347                 i++;
348
349         return (i);
350 }
351
352 isc_result_t
353 ns_config_getclass(const cfg_obj_t *classobj, dns_rdataclass_t defclass,
354                    dns_rdataclass_t *classp) {
355         isc_textregion_t r;
356         isc_result_t result;
357
358         if (!cfg_obj_isstring(classobj)) {
359                 *classp = defclass;
360                 return (ISC_R_SUCCESS);
361         }
362         DE_CONST(cfg_obj_asstring(classobj), r.base);
363         r.length = strlen(r.base);
364         result = dns_rdataclass_fromtext(classp, &r);
365         if (result != ISC_R_SUCCESS)
366                 cfg_obj_log(classobj, ns_g_lctx, ISC_LOG_ERROR,
367                             "unknown class '%s'", r.base);
368         return (result);
369 }
370
371 isc_result_t
372 ns_config_gettype(const cfg_obj_t *typeobj, dns_rdatatype_t deftype,
373                    dns_rdatatype_t *typep) {
374         isc_textregion_t r;
375         isc_result_t result;
376
377         if (!cfg_obj_isstring(typeobj)) {
378                 *typep = deftype;
379                 return (ISC_R_SUCCESS);
380         }
381         DE_CONST(cfg_obj_asstring(typeobj), r.base);
382         r.length = strlen(r.base);
383         result = dns_rdatatype_fromtext(typep, &r);
384         if (result != ISC_R_SUCCESS)
385                 cfg_obj_log(typeobj, ns_g_lctx, ISC_LOG_ERROR,
386                             "unknown type '%s'", r.base);
387         return (result);
388 }
389
390 dns_zonetype_t
391 ns_config_getzonetype(const cfg_obj_t *zonetypeobj) {
392         dns_zonetype_t ztype = dns_zone_none;
393         const char *str;
394
395         str = cfg_obj_asstring(zonetypeobj);
396         if (strcasecmp(str, "master") == 0)
397                 ztype = dns_zone_master;
398         else if (strcasecmp(str, "slave") == 0)
399                 ztype = dns_zone_slave;
400         else if (strcasecmp(str, "stub") == 0)
401                 ztype = dns_zone_stub;
402         else if (strcasecmp(str, "static-stub") == 0)
403                 ztype = dns_zone_staticstub;
404         else if (strcasecmp(str, "redirect") == 0)
405                 ztype = dns_zone_redirect;
406         else
407                 INSIST(0);
408         return (ztype);
409 }
410
411 isc_result_t
412 ns_config_getiplist(const cfg_obj_t *config, const cfg_obj_t *list,
413                     in_port_t defport, isc_mem_t *mctx,
414                     isc_sockaddr_t **addrsp, isc_uint32_t *countp)
415 {
416         int count, i = 0;
417         const cfg_obj_t *addrlist;
418         const cfg_obj_t *portobj;
419         const cfg_listelt_t *element;
420         isc_sockaddr_t *addrs;
421         in_port_t port;
422         isc_result_t result;
423
424         INSIST(addrsp != NULL && *addrsp == NULL);
425         INSIST(countp != NULL);
426
427         addrlist = cfg_tuple_get(list, "addresses");
428         count = ns_config_listcount(addrlist);
429
430         portobj = cfg_tuple_get(list, "port");
431         if (cfg_obj_isuint32(portobj)) {
432                 isc_uint32_t val = cfg_obj_asuint32(portobj);
433                 if (val > ISC_UINT16_MAX) {
434                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
435                                     "port '%u' out of range", val);
436                         return (ISC_R_RANGE);
437                 }
438                 port = (in_port_t) val;
439         } else if (defport != 0)
440                 port = defport;
441         else {
442                 result = ns_config_getport(config, &port);
443                 if (result != ISC_R_SUCCESS)
444                         return (result);
445         }
446
447         addrs = isc_mem_get(mctx, count * sizeof(isc_sockaddr_t));
448         if (addrs == NULL)
449                 return (ISC_R_NOMEMORY);
450
451         for (element = cfg_list_first(addrlist);
452              element != NULL;
453              element = cfg_list_next(element), i++)
454         {
455                 INSIST(i < count);
456                 addrs[i] = *cfg_obj_assockaddr(cfg_listelt_value(element));
457                 if (isc_sockaddr_getport(&addrs[i]) == 0)
458                         isc_sockaddr_setport(&addrs[i], port);
459         }
460         INSIST(i == count);
461
462         *addrsp = addrs;
463         *countp = count;
464
465         return (ISC_R_SUCCESS);
466 }
467
468 void
469 ns_config_putiplist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
470                     isc_uint32_t count)
471 {
472         INSIST(addrsp != NULL && *addrsp != NULL);
473
474         isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
475         *addrsp = NULL;
476 }
477
478 static isc_result_t
479 get_masters_def(const cfg_obj_t *cctx, const char *name,
480                 const cfg_obj_t **ret)
481 {
482         isc_result_t result;
483         const cfg_obj_t *masters = NULL;
484         const cfg_listelt_t *elt;
485
486         result = cfg_map_get(cctx, "masters", &masters);
487         if (result != ISC_R_SUCCESS)
488                 return (result);
489         for (elt = cfg_list_first(masters);
490              elt != NULL;
491              elt = cfg_list_next(elt)) {
492                 const cfg_obj_t *list;
493                 const char *listname;
494
495                 list = cfg_listelt_value(elt);
496                 listname = cfg_obj_asstring(cfg_tuple_get(list, "name"));
497
498                 if (strcasecmp(listname, name) == 0) {
499                         *ret = list;
500                         return (ISC_R_SUCCESS);
501                 }
502         }
503         return (ISC_R_NOTFOUND);
504 }
505
506 isc_result_t
507 ns_config_getipandkeylist(const cfg_obj_t *config, const cfg_obj_t *list,
508                           isc_mem_t *mctx, isc_sockaddr_t **addrsp,
509                           dns_name_t ***keysp, isc_uint32_t *countp)
510 {
511         isc_uint32_t addrcount = 0, keycount = 0, i = 0;
512         isc_uint32_t listcount = 0, l = 0, j;
513         isc_uint32_t stackcount = 0, pushed = 0;
514         isc_result_t result;
515         const cfg_listelt_t *element;
516         const cfg_obj_t *addrlist;
517         const cfg_obj_t *portobj;
518         in_port_t port;
519         dns_fixedname_t fname;
520         isc_sockaddr_t *addrs = NULL;
521         dns_name_t **keys = NULL;
522         struct { const char *name; } *lists = NULL;
523         struct {
524                 const cfg_listelt_t *element;
525                 in_port_t port;
526         } *stack = NULL;
527
528         REQUIRE(addrsp != NULL && *addrsp == NULL);
529         REQUIRE(keysp != NULL && *keysp == NULL);
530         REQUIRE(countp != NULL);
531
532         /*
533          * Get system defaults.
534          */
535         result = ns_config_getport(config, &port);
536         if (result != ISC_R_SUCCESS)
537                 goto cleanup;
538
539  newlist:
540         addrlist = cfg_tuple_get(list, "addresses");
541         portobj = cfg_tuple_get(list, "port");
542         if (cfg_obj_isuint32(portobj)) {
543                 isc_uint32_t val = cfg_obj_asuint32(portobj);
544                 if (val > ISC_UINT16_MAX) {
545                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
546                                     "port '%u' out of range", val);
547                         result = ISC_R_RANGE;
548                         goto cleanup;
549                 }
550                 port = (in_port_t) val;
551         }
552
553         result = ISC_R_NOMEMORY;
554
555         element = cfg_list_first(addrlist);
556  resume:
557         for ( ;
558              element != NULL;
559              element = cfg_list_next(element))
560         {
561                 const cfg_obj_t *addr;
562                 const cfg_obj_t *key;
563                 const char *keystr;
564                 isc_buffer_t b;
565
566                 addr = cfg_tuple_get(cfg_listelt_value(element),
567                                      "masterselement");
568                 key = cfg_tuple_get(cfg_listelt_value(element), "key");
569
570                 if (!cfg_obj_issockaddr(addr)) {
571                         const char *listname = cfg_obj_asstring(addr);
572                         isc_result_t tresult;
573
574                         /* Grow lists? */
575                         if (listcount == l) {
576                                 void * new;
577                                 isc_uint32_t newlen = listcount + 16;
578                                 size_t newsize, oldsize;
579
580                                 newsize = newlen * sizeof(*lists);
581                                 oldsize = listcount * sizeof(*lists);
582                                 new = isc_mem_get(mctx, newsize);
583                                 if (new == NULL)
584                                         goto cleanup;
585                                 if (listcount != 0) {
586                                         memmove(new, lists, oldsize);
587                                         isc_mem_put(mctx, lists, oldsize);
588                                 }
589                                 lists = new;
590                                 listcount = newlen;
591                         }
592                         /* Seen? */
593                         for (j = 0; j < l; j++)
594                                 if (strcasecmp(lists[j].name, listname) == 0)
595                                         break;
596                         if (j < l)
597                                 continue;
598                         tresult = get_masters_def(config, listname, &list);
599                         if (tresult == ISC_R_NOTFOUND) {
600                                 cfg_obj_log(addr, ns_g_lctx, ISC_LOG_ERROR,
601                                     "masters \"%s\" not found", listname);
602
603                                 result = tresult;
604                                 goto cleanup;
605                         }
606                         if (tresult != ISC_R_SUCCESS)
607                                 goto cleanup;
608                         lists[l++].name = listname;
609                         /* Grow stack? */
610                         if (stackcount == pushed) {
611                                 void * new;
612                                 isc_uint32_t newlen = stackcount + 16;
613                                 size_t newsize, oldsize;
614
615                                 newsize = newlen * sizeof(*stack);
616                                 oldsize = stackcount * sizeof(*stack);
617                                 new = isc_mem_get(mctx, newsize);
618                                 if (new == NULL)
619                                         goto cleanup;
620                                 if (stackcount != 0) {
621                                         memmove(new, stack, oldsize);
622                                         isc_mem_put(mctx, stack, oldsize);
623                                 }
624                                 stack = new;
625                                 stackcount = newlen;
626                         }
627                         /*
628                          * We want to resume processing this list on the
629                          * next element.
630                          */
631                         stack[pushed].element = cfg_list_next(element);
632                         stack[pushed].port = port;
633                         pushed++;
634                         goto newlist;
635                 }
636
637                 if (i == addrcount) {
638                         void * new;
639                         isc_uint32_t newlen = addrcount + 16;
640                         size_t newsize, oldsize;
641
642                         newsize = newlen * sizeof(isc_sockaddr_t);
643                         oldsize = addrcount * sizeof(isc_sockaddr_t);
644                         new = isc_mem_get(mctx, newsize);
645                         if (new == NULL)
646                                 goto cleanup;
647                         if (addrcount != 0) {
648                                 memmove(new, addrs, oldsize);
649                                 isc_mem_put(mctx, addrs, oldsize);
650                         }
651                         addrs = new;
652                         addrcount = newlen;
653
654                         newsize = newlen * sizeof(dns_name_t *);
655                         oldsize = keycount * sizeof(dns_name_t *);
656                         new = isc_mem_get(mctx, newsize);
657                         if (new == NULL)
658                                 goto cleanup;
659                         if (keycount != 0) {
660                                 memmove(new, keys, oldsize);
661                                 isc_mem_put(mctx, keys, oldsize);
662                         }
663                         keys = new;
664                         keycount = newlen;
665                 }
666
667                 addrs[i] = *cfg_obj_assockaddr(addr);
668                 if (isc_sockaddr_getport(&addrs[i]) == 0)
669                         isc_sockaddr_setport(&addrs[i], port);
670                 keys[i] = NULL;
671                 i++;    /* Increment here so that cleanup on error works. */
672                 if (!cfg_obj_isstring(key))
673                         continue;
674                 keys[i - 1] = isc_mem_get(mctx, sizeof(dns_name_t));
675                 if (keys[i - 1] == NULL)
676                         goto cleanup;
677                 dns_name_init(keys[i - 1], NULL);
678
679                 keystr = cfg_obj_asstring(key);
680                 isc_buffer_constinit(&b, keystr, strlen(keystr));
681                 isc_buffer_add(&b, strlen(keystr));
682                 dns_fixedname_init(&fname);
683                 result = dns_name_fromtext(dns_fixedname_name(&fname), &b,
684                                            dns_rootname, 0, NULL);
685                 if (result != ISC_R_SUCCESS)
686                         goto cleanup;
687                 result = dns_name_dup(dns_fixedname_name(&fname), mctx,
688                                       keys[i - 1]);
689                 if (result != ISC_R_SUCCESS)
690                         goto cleanup;
691         }
692         if (pushed != 0) {
693                 pushed--;
694                 element = stack[pushed].element;
695                 port = stack[pushed].port;
696                 goto resume;
697         }
698         if (i < addrcount) {
699                 void * new;
700                 size_t newsize, oldsize;
701
702                 newsize = i * sizeof(isc_sockaddr_t);
703                 oldsize = addrcount * sizeof(isc_sockaddr_t);
704                 if (i != 0) {
705                         new = isc_mem_get(mctx, newsize);
706                         if (new == NULL)
707                                 goto cleanup;
708                         memmove(new, addrs, newsize);
709                 } else
710                         new = NULL;
711                 isc_mem_put(mctx, addrs, oldsize);
712                 addrs = new;
713                 addrcount = i;
714
715                 newsize = i * sizeof(dns_name_t *);
716                 oldsize = keycount * sizeof(dns_name_t *);
717                 if (i != 0) {
718                         new = isc_mem_get(mctx, newsize);
719                         if (new == NULL)
720                                 goto cleanup;
721                         memmove(new, keys,  newsize);
722                 } else
723                         new = NULL;
724                 isc_mem_put(mctx, keys, oldsize);
725                 keys = new;
726                 keycount = i;
727         }
728
729         if (lists != NULL)
730                 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
731         if (stack != NULL)
732                 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
733
734         INSIST(keycount == addrcount);
735
736         *addrsp = addrs;
737         *keysp = keys;
738         *countp = addrcount;
739
740         return (ISC_R_SUCCESS);
741
742  cleanup:
743         if (addrs != NULL)
744                 isc_mem_put(mctx, addrs, addrcount * sizeof(isc_sockaddr_t));
745         if (keys != NULL) {
746                 for (j = 0; j < i; j++) {
747                         if (keys[j] == NULL)
748                                 continue;
749                         if (dns_name_dynamic(keys[j]))
750                                 dns_name_free(keys[j], mctx);
751                         isc_mem_put(mctx, keys[j], sizeof(dns_name_t));
752                 }
753                 isc_mem_put(mctx, keys, keycount * sizeof(dns_name_t *));
754         }
755         if (lists != NULL)
756                 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
757         if (stack != NULL)
758                 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
759         return (result);
760 }
761
762 void
763 ns_config_putipandkeylist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
764                           dns_name_t ***keysp, isc_uint32_t count)
765 {
766         unsigned int i;
767         dns_name_t **keys = *keysp;
768
769         INSIST(addrsp != NULL && *addrsp != NULL);
770
771         isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
772         for (i = 0; i < count; i++) {
773                 if (keys[i] == NULL)
774                         continue;
775                 if (dns_name_dynamic(keys[i]))
776                         dns_name_free(keys[i], mctx);
777                 isc_mem_put(mctx, keys[i], sizeof(dns_name_t));
778         }
779         isc_mem_put(mctx, *keysp, count * sizeof(dns_name_t *));
780         *addrsp = NULL;
781         *keysp = NULL;
782 }
783
784 isc_result_t
785 ns_config_getport(const cfg_obj_t *config, in_port_t *portp) {
786         const cfg_obj_t *maps[3];
787         const cfg_obj_t *options = NULL;
788         const cfg_obj_t *portobj = NULL;
789         isc_result_t result;
790         int i;
791
792         (void)cfg_map_get(config, "options", &options);
793         i = 0;
794         if (options != NULL)
795                 maps[i++] = options;
796         maps[i++] = ns_g_defaults;
797         maps[i] = NULL;
798
799         result = ns_config_get(maps, "port", &portobj);
800         INSIST(result == ISC_R_SUCCESS);
801         if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
802                 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
803                             "port '%u' out of range",
804                             cfg_obj_asuint32(portobj));
805                 return (ISC_R_RANGE);
806         }
807         *portp = (in_port_t)cfg_obj_asuint32(portobj);
808         return (ISC_R_SUCCESS);
809 }
810
811 struct keyalgorithms {
812         const char *str;
813         enum { hmacnone, hmacmd5, hmacsha1, hmacsha224,
814                hmacsha256, hmacsha384, hmacsha512 } hmac;
815         unsigned int type;
816         isc_uint16_t size;
817 } algorithms[] = {
818         { "hmac-md5", hmacmd5, DST_ALG_HMACMD5, 128 },
819         { "hmac-md5.sig-alg.reg.int", hmacmd5, DST_ALG_HMACMD5, 0 },
820         { "hmac-md5.sig-alg.reg.int.", hmacmd5, DST_ALG_HMACMD5, 0 },
821         { "hmac-sha1", hmacsha1, DST_ALG_HMACSHA1, 160 },
822         { "hmac-sha224", hmacsha224, DST_ALG_HMACSHA224, 224 },
823         { "hmac-sha256", hmacsha256, DST_ALG_HMACSHA256, 256 },
824         { "hmac-sha384", hmacsha384, DST_ALG_HMACSHA384, 384 },
825         { "hmac-sha512", hmacsha512, DST_ALG_HMACSHA512, 512 },
826         {  NULL, hmacnone, DST_ALG_UNKNOWN, 0 }
827 };
828
829 isc_result_t
830 ns_config_getkeyalgorithm(const char *str, dns_name_t **name,
831                           isc_uint16_t *digestbits)
832 {
833         return (ns_config_getkeyalgorithm2(str, name, NULL, digestbits));
834 }
835
836 isc_result_t
837 ns_config_getkeyalgorithm2(const char *str, dns_name_t **name,
838                            unsigned int *typep, isc_uint16_t *digestbits)
839 {
840         int i;
841         size_t len = 0;
842         isc_uint16_t bits;
843         isc_result_t result;
844
845         for (i = 0; algorithms[i].str != NULL; i++) {
846                 len = strlen(algorithms[i].str);
847                 if (strncasecmp(algorithms[i].str, str, len) == 0 &&
848                     (str[len] == '\0' ||
849                      (algorithms[i].size != 0 && str[len] == '-')))
850                         break;
851         }
852         if (algorithms[i].str == NULL)
853                 return (ISC_R_NOTFOUND);
854         if (str[len] == '-') {
855                 result = isc_parse_uint16(&bits, str + len + 1, 10);
856                 if (result != ISC_R_SUCCESS)
857                         return (result);
858                 if (bits > algorithms[i].size)
859                         return (ISC_R_RANGE);
860         } else if (algorithms[i].size == 0)
861                 bits = 128;
862         else
863                 bits = algorithms[i].size;
864
865         if (name != NULL) {
866                 switch (algorithms[i].hmac) {
867                 case hmacmd5: *name = dns_tsig_hmacmd5_name; break;
868                 case hmacsha1: *name = dns_tsig_hmacsha1_name; break;
869                 case hmacsha224: *name = dns_tsig_hmacsha224_name; break;
870                 case hmacsha256: *name = dns_tsig_hmacsha256_name; break;
871                 case hmacsha384: *name = dns_tsig_hmacsha384_name; break;
872                 case hmacsha512: *name = dns_tsig_hmacsha512_name; break;
873                 default:
874                         INSIST(0);
875                 }
876         }
877         if (typep != NULL)
878                 *typep = algorithms[i].type;
879         if (digestbits != NULL)
880                 *digestbits = bits;
881         return (ISC_R_SUCCESS);
882 }