contrib/bind9/bin/named/config.c

   1 /*
   2  * Copyright (C) 2004-2014  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         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\
  79         port 53;\n\
  80         recursing-file \"named.recursing\";\n\
  81         secroots-file \"named.secroots\";\n\
  82 "
  83 #ifdef PATH_RANDOMDEV
  84 "\
  85         random-device \"" PATH_RANDOMDEV "\";\n\
  86 "
  87 #endif
  88 "\
  89         recursive-clients 1000;\n\
  90         resolver-query-timeout 10;\n\
  91         rrset-order {type NS order random; order cyclic; };\n\
  92         serial-queries 20;\n\
  93         serial-query-rate 20;\n\
  94         server-id none;\n\
  95         statistics-file \"named.stats\";\n\
  96         statistics-interval 60;\n\
  97         tcp-clients 100;\n\
  98         tcp-listen-queue 10;\n\
  99 #       tkey-dhkey <none>\n\
 100 #       tkey-gssapi-credential <none>\n\
 101 #       tkey-domain <none>\n\
 102         transfers-per-ns 2;\n\
 103         transfers-in 10;\n\
 104         transfers-out 10;\n\
 105         treat-cr-as-space true;\n\
 106         use-id-pool true;\n\
 107         use-ixfr true;\n\
 108         edns-udp-size 4096;\n\
 109         max-udp-size 4096;\n\
 110         request-nsid false;\n\
 111         reserved-sockets 512;\n\
 112 \n\
 113         /* DLV */\n\
 114         dnssec-lookaside . trust-anchor dlv.isc.org;\n\
 115 \n\
 116         /* view */\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\
 124 #       sortlist <none>\n\
 125 #       topology <none>\n\
 126         auth-nxdomain false;\n\
 127         minimal-responses false;\n\
 128         recursion true;\n\
 129         provide-ixfr true;\n\
 130         request-ixfr true;\n\
 131         fetch-glue no;\n\
 132         rfc2308-type1 no;\n\
 133         additional-from-auth true;\n\
 134         additional-from-cache true;\n\
 135         query-source address *;\n\
 136         query-source-v6 address *;\n\
 137         notify-source *;\n\
 138         notify-source-v6 *;\n\
 139         cleaning-interval 0;  /* now meaningless */\n\
 140         min-roots 2;\n\
 141         lame-ttl 600;\n\
 142         max-ncache-ttl 10800; /* 3 hours */\n\
 143         max-cache-ttl 604800; /* 1 week */\n\
 144         transfer-format many-answers;\n\
 145         max-cache-size 0;\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\
 150         check-mx warn;\n\
 151         check-spf warn;\n\
 152         acache-enable no;\n\
 153         acache-cleaning-interval 60;\n\
 154         max-acache-size 16M;\n\
 155         dnssec-enable yes;\n\
 156         dnssec-validation yes; \n\
 157         dnssec-accept-expired no;\n\
 158         clients-per-query 10;\n\
 159         max-clients-per-query 100;\n\
 160         max-recursion-depth 7;\n\
 161         max-recursion-queries 50;\n\
 162         zero-no-soa-ttl-cache no;\n\
 163         nsec3-test-zone no;\n\
 164         allow-new-zones no;\n\
 165 "
 166 #ifdef ALLOW_FILTER_AAAA_ON_V4
 167 "       filter-aaaa-on-v4 no;\n\
 168         filter-aaaa { any; };\n\
 169 "
 170 #endif
 171
 172 "       /* zone */\n\
 173         allow-query {any;};\n\
 174         allow-query-on {any;};\n\
 175         allow-transfer {any;};\n\
 176         notify yes;\n\
 177 #       also-notify <none>\n\
 178         notify-delay 5;\n\
 179         notify-to-soa no;\n\
 180         dialup no;\n\
 181 #       forward <none>\n\
 182 #       forwarders <none>\n\
 183         maintain-ixfr-base no;\n\
 184 #       max-ixfr-log-size <obsolete>\n\
 185         transfer-source *;\n\
 186         transfer-source-v6 *;\n\
 187         alt-transfer-source *;\n\
 188         alt-transfer-source-v6 *;\n\
 189         max-transfer-time-in 120;\n\
 190         max-transfer-time-out 120;\n\
 191         max-transfer-idle-in 60;\n\
 192         max-transfer-idle-out 60;\n\
 193         max-retry-time 1209600; /* 2 weeks */\n\
 194         min-retry-time 500;\n\
 195         max-refresh-time 2419200; /* 4 weeks */\n\
 196         min-refresh-time 300;\n\
 197         multi-master no;\n\
 198         dnssec-secure-to-insecure no;\n\
 199         sig-validity-interval 30; /* days */\n\
 200         sig-signing-nodes 100;\n\
 201         sig-signing-signatures 10;\n\
 202         sig-signing-type 65534;\n\
 203         zone-statistics false;\n\
 204         max-journal-size unlimited;\n\
 205         ixfr-from-differences false;\n\
 206         check-wildcard yes;\n\
 207         check-sibling yes;\n\
 208         check-integrity yes;\n\
 209         check-mx-cname warn;\n\
 210         check-srv-cname warn;\n\
 211         zero-no-soa-ttl yes;\n\
 212         update-check-ksk yes;\n\
 213         dnssec-dnskey-kskonly no;\n\
 214         try-tcp-refresh yes; /* BIND 8 compat */\n\
 215 };\n\
 216 "
 217
 218 "#\n\
 219 #  Zones in the \"_bind\" view are NOT counted in the count of zones.\n\
 220 #\n\
 221 view \"_bind\" chaos {\n\
 222         recursion no;\n\
 223         notify no;\n\
 224         allow-new-zones no;\n\
 225 \n\
 226         zone \"version.bind\" chaos {\n\
 227                 type master;\n\
 228                 database \"_builtin version\";\n\
 229         };\n\
 230 \n\
 231         zone \"hostname.bind\" chaos {\n\
 232                 type master;\n\
 233                 database \"_builtin hostname\";\n\
 234         };\n\
 235 \n\
 236         zone \"authors.bind\" chaos {\n\
 237                 type master;\n\
 238                 database \"_builtin authors\";\n\
 239         };\n\
 240 \n\
 241         zone \"id.server\" chaos {\n\
 242                 type master;\n\
 243                 database \"_builtin id\";\n\
 244         };\n\
 245 };\n\
 246 "
 247 "#\n\
 248 #  Default trusted key(s) for builtin DLV support\n\
 249 #  (used if \"dnssec-lookaside auto;\" is set and\n\
 250 #  sysconfdir/bind.keys doesn't exist).\n\
 251 #\n\
 252 # BEGIN MANAGED KEYS\n"
 253
 254 /* Imported from bind.keys.h: */
 255 MANAGED_KEYS
 256
 257 "# END MANAGED KEYS\n\
 258 ";
 259
 260 isc_result_t
 261 ns_config_parsedefaults(cfg_parser_t *parser, cfg_obj_t **conf) {
 262         isc_buffer_t b;
 263
 264         isc_buffer_init(&b, defaultconf, sizeof(defaultconf) - 1);
 265         isc_buffer_add(&b, sizeof(defaultconf) - 1);
 266         return (cfg_parse_buffer(parser, &b, &cfg_type_namedconf, conf));
 267 }
 268
 269 isc_result_t
 270 ns_config_get(const cfg_obj_t **maps, const char *name, const cfg_obj_t **obj) {
 271         int i;
 272
 273         for (i = 0;; i++) {
 274                 if (maps[i] == NULL)
 275                         return (ISC_R_NOTFOUND);
 276                 if (cfg_map_get(maps[i], name, obj) == ISC_R_SUCCESS)
 277                         return (ISC_R_SUCCESS);
 278         }
 279 }
 280
 281 isc_result_t
 282 ns_checknames_get(const cfg_obj_t **maps, const char *which,
 283                   const cfg_obj_t **obj)
 284 {
 285         const cfg_listelt_t *element;
 286         const cfg_obj_t *checknames;
 287         const cfg_obj_t *type;
 288         const cfg_obj_t *value;
 289         int i;
 290
 291         for (i = 0;; i++) {
 292                 if (maps[i] == NULL)
 293                         return (ISC_R_NOTFOUND);
 294                 checknames = NULL;
 295                 if (cfg_map_get(maps[i], "check-names", &checknames) == ISC_R_SUCCESS) {
 296                         /*
 297                          * Zone map entry is not a list.
 298                          */
 299                         if (checknames != NULL && !cfg_obj_islist(checknames)) {
 300                                 *obj = checknames;
 301                                 return (ISC_R_SUCCESS);
 302                         }
 303                         for (element = cfg_list_first(checknames);
 304                              element != NULL;
 305                              element = cfg_list_next(element)) {
 306                                 value = cfg_listelt_value(element);
 307                                 type = cfg_tuple_get(value, "type");
 308                                 if (strcasecmp(cfg_obj_asstring(type), which) == 0) {
 309                                         *obj = cfg_tuple_get(value, "mode");
 310                                         return (ISC_R_SUCCESS);
 311                                 }
 312                         }
 313
 314                 }
 315         }
 316 }
 317
 318 int
 319 ns_config_listcount(const cfg_obj_t *list) {
 320         const cfg_listelt_t *e;
 321         int i = 0;
 322
 323         for (e = cfg_list_first(list); e != NULL; e = cfg_list_next(e))
 324                 i++;
 325
 326         return (i);
 327 }
 328
 329 isc_result_t
 330 ns_config_getclass(const cfg_obj_t *classobj, dns_rdataclass_t defclass,
 331                    dns_rdataclass_t *classp) {
 332         isc_textregion_t r;
 333         isc_result_t result;
 334
 335         if (!cfg_obj_isstring(classobj)) {
 336                 *classp = defclass;
 337                 return (ISC_R_SUCCESS);
 338         }
 339         DE_CONST(cfg_obj_asstring(classobj), r.base);
 340         r.length = strlen(r.base);
 341         result = dns_rdataclass_fromtext(classp, &r);
 342         if (result != ISC_R_SUCCESS)
 343                 cfg_obj_log(classobj, ns_g_lctx, ISC_LOG_ERROR,
 344                             "unknown class '%s'", r.base);
 345         return (result);
 346 }
 347
 348 isc_result_t
 349 ns_config_gettype(const cfg_obj_t *typeobj, dns_rdatatype_t deftype,
 350                    dns_rdatatype_t *typep) {
 351         isc_textregion_t r;
 352         isc_result_t result;
 353
 354         if (!cfg_obj_isstring(typeobj)) {
 355                 *typep = deftype;
 356                 return (ISC_R_SUCCESS);
 357         }
 358         DE_CONST(cfg_obj_asstring(typeobj), r.base);
 359         r.length = strlen(r.base);
 360         result = dns_rdatatype_fromtext(typep, &r);
 361         if (result != ISC_R_SUCCESS)
 362                 cfg_obj_log(typeobj, ns_g_lctx, ISC_LOG_ERROR,
 363                             "unknown type '%s'", r.base);
 364         return (result);
 365 }
 366
 367 dns_zonetype_t
 368 ns_config_getzonetype(const cfg_obj_t *zonetypeobj) {
 369         dns_zonetype_t ztype = dns_zone_none;
 370         const char *str;
 371
 372         str = cfg_obj_asstring(zonetypeobj);
 373         if (strcasecmp(str, "master") == 0)
 374                 ztype = dns_zone_master;
 375         else if (strcasecmp(str, "slave") == 0)
 376                 ztype = dns_zone_slave;
 377         else if (strcasecmp(str, "stub") == 0)
 378                 ztype = dns_zone_stub;
 379         else if (strcasecmp(str, "static-stub") == 0)
 380                 ztype = dns_zone_staticstub;
 381         else
 382                 INSIST(0);
 383         return (ztype);
 384 }
 385
 386 isc_result_t
 387 ns_config_getiplist(const cfg_obj_t *config, const cfg_obj_t *list,
 388                     in_port_t defport, isc_mem_t *mctx,
 389                     isc_sockaddr_t **addrsp, isc_uint32_t *countp)
 390 {
 391         int count, i = 0;
 392         const cfg_obj_t *addrlist;
 393         const cfg_obj_t *portobj;
 394         const cfg_listelt_t *element;
 395         isc_sockaddr_t *addrs;
 396         in_port_t port;
 397         isc_result_t result;
 398
 399         INSIST(addrsp != NULL && *addrsp == NULL);
 400         INSIST(countp != NULL);
 401
 402         addrlist = cfg_tuple_get(list, "addresses");
 403         count = ns_config_listcount(addrlist);
 404
 405         portobj = cfg_tuple_get(list, "port");
 406         if (cfg_obj_isuint32(portobj)) {
 407                 isc_uint32_t val = cfg_obj_asuint32(portobj);
 408                 if (val > ISC_UINT16_MAX) {
 409                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 410                                     "port '%u' out of range", val);
 411                         return (ISC_R_RANGE);
 412                 }
 413                 port = (in_port_t) val;
 414         } else if (defport != 0)
 415                 port = defport;
 416         else {
 417                 result = ns_config_getport(config, &port);
 418                 if (result != ISC_R_SUCCESS)
 419                         return (result);
 420         }
 421
 422         addrs = isc_mem_get(mctx, count * sizeof(isc_sockaddr_t));
 423         if (addrs == NULL)
 424                 return (ISC_R_NOMEMORY);
 425
 426         for (element = cfg_list_first(addrlist);
 427              element != NULL;
 428              element = cfg_list_next(element), i++)
 429         {
 430                 INSIST(i < count);
 431                 addrs[i] = *cfg_obj_assockaddr(cfg_listelt_value(element));
 432                 if (isc_sockaddr_getport(&addrs[i]) == 0)
 433                         isc_sockaddr_setport(&addrs[i], port);
 434         }
 435         INSIST(i == count);
 436
 437         *addrsp = addrs;
 438         *countp = count;
 439
 440         return (ISC_R_SUCCESS);
 441 }
 442
 443 void
 444 ns_config_putiplist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 445                     isc_uint32_t count)
 446 {
 447         INSIST(addrsp != NULL && *addrsp != NULL);
 448
 449         isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
 450         *addrsp = NULL;
 451 }
 452
 453 static isc_result_t
 454 get_masters_def(const cfg_obj_t *cctx, const char *name,
 455                 const cfg_obj_t **ret)
 456 {
 457         isc_result_t result;
 458         const cfg_obj_t *masters = NULL;
 459         const cfg_listelt_t *elt;
 460
 461         result = cfg_map_get(cctx, "masters", &masters);
 462         if (result != ISC_R_SUCCESS)
 463                 return (result);
 464         for (elt = cfg_list_first(masters);
 465              elt != NULL;
 466              elt = cfg_list_next(elt)) {
 467                 const cfg_obj_t *list;
 468                 const char *listname;
 469
 470                 list = cfg_listelt_value(elt);
 471                 listname = cfg_obj_asstring(cfg_tuple_get(list, "name"));
 472
 473                 if (strcasecmp(listname, name) == 0) {
 474                         *ret = list;
 475                         return (ISC_R_SUCCESS);
 476                 }
 477         }
 478         return (ISC_R_NOTFOUND);
 479 }
 480
 481 isc_result_t
 482 ns_config_getipandkeylist(const cfg_obj_t *config, const cfg_obj_t *list,
 483                           isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 484                           dns_name_t ***keysp, isc_uint32_t *countp)
 485 {
 486         isc_uint32_t addrcount = 0, keycount = 0, i = 0;
 487         isc_uint32_t listcount = 0, l = 0, j;
 488         isc_uint32_t stackcount = 0, pushed = 0;
 489         isc_result_t result;
 490         const cfg_listelt_t *element;
 491         const cfg_obj_t *addrlist;
 492         const cfg_obj_t *portobj;
 493         in_port_t port;
 494         dns_fixedname_t fname;
 495         isc_sockaddr_t *addrs = NULL;
 496         dns_name_t **keys = NULL;
 497         struct { const char *name; } *lists = NULL;
 498         struct {
 499                 const cfg_listelt_t *element;
 500                 in_port_t port;
 501         } *stack = NULL;
 502
 503         REQUIRE(addrsp != NULL && *addrsp == NULL);
 504         REQUIRE(keysp != NULL && *keysp == NULL);
 505         REQUIRE(countp != NULL);
 506
 507  newlist:
 508         addrlist = cfg_tuple_get(list, "addresses");
 509         portobj = cfg_tuple_get(list, "port");
 510         if (cfg_obj_isuint32(portobj)) {
 511                 isc_uint32_t val = cfg_obj_asuint32(portobj);
 512                 if (val > ISC_UINT16_MAX) {
 513                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 514                                     "port '%u' out of range", val);
 515                         result = ISC_R_RANGE;
 516                         goto cleanup;
 517                 }
 518                 port = (in_port_t) val;
 519         } else {
 520                 result = ns_config_getport(config, &port);
 521                 if (result != ISC_R_SUCCESS)
 522                         goto cleanup;
 523         }
 524
 525         result = ISC_R_NOMEMORY;
 526
 527         element = cfg_list_first(addrlist);
 528  resume:
 529         for ( ;
 530              element != NULL;
 531              element = cfg_list_next(element))
 532         {
 533                 const cfg_obj_t *addr;
 534                 const cfg_obj_t *key;
 535                 const char *keystr;
 536                 isc_buffer_t b;
 537
 538                 addr = cfg_tuple_get(cfg_listelt_value(element),
 539                                      "masterselement");
 540                 key = cfg_tuple_get(cfg_listelt_value(element), "key");
 541
 542                 if (!cfg_obj_issockaddr(addr)) {
 543                         const char *listname = cfg_obj_asstring(addr);
 544                         isc_result_t tresult;
 545
 546                         /* Grow lists? */
 547                         if (listcount == l) {
 548                                 void * new;
 549                                 isc_uint32_t newlen = listcount + 16;
 550                                 size_t newsize, oldsize;
 551
 552                                 newsize = newlen * sizeof(*lists);
 553                                 oldsize = listcount * sizeof(*lists);
 554                                 new = isc_mem_get(mctx, newsize);
 555                                 if (new == NULL)
 556                                         goto cleanup;
 557                                 if (listcount != 0) {
 558                                         memmove(new, lists, oldsize);
 559                                         isc_mem_put(mctx, lists, oldsize);
 560                                 }
 561                                 lists = new;
 562                                 listcount = newlen;
 563                         }
 564                         /* Seen? */
 565                         for (j = 0; j < l; j++)
 566                                 if (strcasecmp(lists[j].name, listname) == 0)
 567                                         break;
 568                         if (j < l)
 569                                 continue;
 570                         tresult = get_masters_def(config, listname, &list);
 571                         if (tresult == ISC_R_NOTFOUND) {
 572                                 cfg_obj_log(addr, ns_g_lctx, ISC_LOG_ERROR,
 573                                     "masters \"%s\" not found", listname);
 574
 575                                 result = tresult;
 576                                 goto cleanup;
 577                         }
 578                         if (tresult != ISC_R_SUCCESS)
 579                                 goto cleanup;
 580                         lists[l++].name = listname;
 581                         /* Grow stack? */
 582                         if (stackcount == pushed) {
 583                                 void * new;
 584                                 isc_uint32_t newlen = stackcount + 16;
 585                                 size_t newsize, oldsize;
 586
 587                                 newsize = newlen * sizeof(*stack);
 588                                 oldsize = stackcount * sizeof(*stack);
 589                                 new = isc_mem_get(mctx, newsize);
 590                                 if (new == NULL)
 591                                         goto cleanup;
 592                                 if (stackcount != 0) {
 593                                         memmove(new, stack, oldsize);
 594                                         isc_mem_put(mctx, stack, oldsize);
 595                                 }
 596                                 stack = new;
 597                                 stackcount = newlen;
 598                         }
 599                         /*
 600                          * We want to resume processing this list on the
 601                          * next element.
 602                          */
 603                         stack[pushed].element = cfg_list_next(element);
 604                         stack[pushed].port = port;
 605                         pushed++;
 606                         goto newlist;
 607                 }
 608
 609                 if (i == addrcount) {
 610                         void * new;
 611                         isc_uint32_t newlen = addrcount + 16;
 612                         size_t newsize, oldsize;
 613
 614                         newsize = newlen * sizeof(isc_sockaddr_t);
 615                         oldsize = addrcount * sizeof(isc_sockaddr_t);
 616                         new = isc_mem_get(mctx, newsize);
 617                         if (new == NULL)
 618                                 goto cleanup;
 619                         if (addrcount != 0) {
 620                                 memmove(new, addrs, oldsize);
 621                                 isc_mem_put(mctx, addrs, oldsize);
 622                         }
 623                         addrs = new;
 624                         addrcount = newlen;
 625
 626                         newsize = newlen * sizeof(dns_name_t *);
 627                         oldsize = keycount * sizeof(dns_name_t *);
 628                         new = isc_mem_get(mctx, newsize);
 629                         if (new == NULL)
 630                                 goto cleanup;
 631                         if (keycount != 0) {
 632                                 memmove(new, keys, oldsize);
 633                                 isc_mem_put(mctx, keys, oldsize);
 634                         }
 635                         keys = new;
 636                         keycount = newlen;
 637                 }
 638
 639                 addrs[i] = *cfg_obj_assockaddr(addr);
 640                 if (isc_sockaddr_getport(&addrs[i]) == 0)
 641                         isc_sockaddr_setport(&addrs[i], port);
 642                 keys[i] = NULL;
 643                 i++;    /* Increment here so that cleanup on error works. */
 644                 if (!cfg_obj_isstring(key))
 645                         continue;
 646                 keys[i - 1] = isc_mem_get(mctx, sizeof(dns_name_t));
 647                 if (keys[i - 1] == NULL)
 648                         goto cleanup;
 649                 dns_name_init(keys[i - 1], NULL);
 650
 651                 keystr = cfg_obj_asstring(key);
 652                 isc_buffer_constinit(&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)
 658                         goto cleanup;
 659                 result = dns_name_dup(dns_fixedname_name(&fname), mctx,
 660                                       keys[i - 1]);
 661                 if (result != ISC_R_SUCCESS)
 662                         goto cleanup;
 663         }
 664         if (pushed != 0) {
 665                 pushed--;
 666                 element = stack[pushed].element;
 667                 port = stack[pushed].port;
 668                 goto resume;
 669         }
 670         if (i < addrcount) {
 671                 void * new;
 672                 size_t newsize, oldsize;
 673
 674                 newsize = i * sizeof(isc_sockaddr_t);
 675                 oldsize = addrcount * sizeof(isc_sockaddr_t);
 676                 if (i != 0) {
 677                         new = isc_mem_get(mctx, newsize);
 678                         if (new == NULL)
 679                                 goto cleanup;
 680                         memmove(new, addrs, newsize);
 681                 } else
 682                         new = NULL;
 683                 isc_mem_put(mctx, addrs, oldsize);
 684                 addrs = new;
 685                 addrcount = i;
 686
 687                 newsize = i * sizeof(dns_name_t *);
 688                 oldsize = keycount * sizeof(dns_name_t *);
 689                 if (i != 0) {
 690                         new = isc_mem_get(mctx, newsize);
 691                         if (new == NULL)
 692                                 goto cleanup;
 693                         memmove(new, keys,  newsize);
 694                 } else
 695                         new = NULL;
 696                 isc_mem_put(mctx, keys, oldsize);
 697                 keys = new;
 698                 keycount = i;
 699         }
 700
 701         if (lists != NULL)
 702                 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
 703         if (stack != NULL)
 704                 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
 705
 706         INSIST(keycount == addrcount);
 707
 708         *addrsp = addrs;
 709         *keysp = keys;
 710         *countp = addrcount;
 711
 712         return (ISC_R_SUCCESS);
 713
 714  cleanup:
 715         if (addrs != NULL)
 716                 isc_mem_put(mctx, addrs, addrcount * sizeof(isc_sockaddr_t));
 717         if (keys != NULL) {
 718                 for (j = 0; j < i; j++) {
 719                         if (keys[j] == NULL)
 720                                 continue;
 721                         if (dns_name_dynamic(keys[j]))
 722                                 dns_name_free(keys[j], mctx);
 723                         isc_mem_put(mctx, keys[j], sizeof(dns_name_t));
 724                 }
 725                 isc_mem_put(mctx, keys, keycount * sizeof(dns_name_t *));
 726         }
 727         if (lists != NULL)
 728                 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
 729         if (stack != NULL)
 730                 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
 731         return (result);
 732 }
 733
 734 void
 735 ns_config_putipandkeylist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 736                           dns_name_t ***keysp, isc_uint32_t count)
 737 {
 738         unsigned int i;
 739         dns_name_t **keys = *keysp;
 740
 741         INSIST(addrsp != NULL && *addrsp != NULL);
 742
 743         isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
 744         for (i = 0; i < count; i++) {
 745                 if (keys[i] == NULL)
 746                         continue;
 747                 if (dns_name_dynamic(keys[i]))
 748                         dns_name_free(keys[i], mctx);
 749                 isc_mem_put(mctx, keys[i], sizeof(dns_name_t));
 750         }
 751         isc_mem_put(mctx, *keysp, count * sizeof(dns_name_t *));
 752         *addrsp = NULL;
 753         *keysp = NULL;
 754 }
 755
 756 isc_result_t
 757 ns_config_getport(const cfg_obj_t *config, in_port_t *portp) {
 758         const cfg_obj_t *maps[3];
 759         const cfg_obj_t *options = NULL;
 760         const cfg_obj_t *portobj = NULL;
 761         isc_result_t result;
 762         int i;
 763
 764         (void)cfg_map_get(config, "options", &options);
 765         i = 0;
 766         if (options != NULL)
 767                 maps[i++] = options;
 768         maps[i++] = ns_g_defaults;
 769         maps[i] = NULL;
 770
 771         result = ns_config_get(maps, "port", &portobj);
 772         INSIST(result == ISC_R_SUCCESS);
 773         if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
 774                 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 775                             "port '%u' out of range",
 776                             cfg_obj_asuint32(portobj));
 777                 return (ISC_R_RANGE);
 778         }
 779         *portp = (in_port_t)cfg_obj_asuint32(portobj);
 780         return (ISC_R_SUCCESS);
 781 }
 782
 783 struct keyalgorithms {
 784         const char *str;
 785         enum { hmacnone, hmacmd5, hmacsha1, hmacsha224,
 786                hmacsha256, hmacsha384, hmacsha512 } hmac;
 787         unsigned int type;
 788         isc_uint16_t size;
 789 } algorithms[] = {
 790         { "hmac-md5", hmacmd5, DST_ALG_HMACMD5, 128 },
 791         { "hmac-md5.sig-alg.reg.int", hmacmd5, DST_ALG_HMACMD5, 0 },
 792         { "hmac-md5.sig-alg.reg.int.", hmacmd5, DST_ALG_HMACMD5, 0 },
 793         { "hmac-sha1", hmacsha1, DST_ALG_HMACSHA1, 160 },
 794         { "hmac-sha224", hmacsha224, DST_ALG_HMACSHA224, 224 },
 795         { "hmac-sha256", hmacsha256, DST_ALG_HMACSHA256, 256 },
 796         { "hmac-sha384", hmacsha384, DST_ALG_HMACSHA384, 384 },
 797         { "hmac-sha512", hmacsha512, DST_ALG_HMACSHA512, 512 },
 798         {  NULL, hmacnone, DST_ALG_UNKNOWN, 0 }
 799 };
 800
 801 isc_result_t
 802 ns_config_getkeyalgorithm(const char *str, dns_name_t **name,
 803                           isc_uint16_t *digestbits)
 804 {
 805         return (ns_config_getkeyalgorithm2(str, name, NULL, digestbits));
 806 }
 807
 808 isc_result_t
 809 ns_config_getkeyalgorithm2(const char *str, dns_name_t **name,
 810                            unsigned int *typep, isc_uint16_t *digestbits)
 811 {
 812         int i;
 813         size_t len = 0;
 814         isc_uint16_t bits;
 815         isc_result_t result;
 816
 817         for (i = 0; algorithms[i].str != NULL; i++) {
 818                 len = strlen(algorithms[i].str);
 819                 if (strncasecmp(algorithms[i].str, str, len) == 0 &&
 820                     (str[len] == '\0' ||
 821                      (algorithms[i].size != 0 && str[len] == '-')))
 822                         break;
 823         }
 824         if (algorithms[i].str == NULL)
 825                 return (ISC_R_NOTFOUND);
 826         if (str[len] == '-') {
 827                 result = isc_parse_uint16(&bits, str + len + 1, 10);
 828                 if (result != ISC_R_SUCCESS)
 829                         return (result);
 830                 if (bits > algorithms[i].size)
 831                         return (ISC_R_RANGE);
 832         } else if (algorithms[i].size == 0)
 833                 bits = 128;
 834         else
 835                 bits = algorithms[i].size;
 836
 837         if (name != NULL) {
 838                 switch (algorithms[i].hmac) {
 839                 case hmacmd5: *name = dns_tsig_hmacmd5_name; break;
 840                 case hmacsha1: *name = dns_tsig_hmacsha1_name; break;
 841                 case hmacsha224: *name = dns_tsig_hmacsha224_name; break;
 842                 case hmacsha256: *name = dns_tsig_hmacsha256_name; break;
 843                 case hmacsha384: *name = dns_tsig_hmacsha384_name; break;
 844                 case hmacsha512: *name = dns_tsig_hmacsha512_name; break;
 845                 default:
 846                         INSIST(0);
 847                 }
 848         }
 849         if (typep != NULL)
 850                 *typep = algorithms[i].type;
 851         if (digestbits != NULL)
 852                 *digestbits = bits;
 853         return (ISC_R_SUCCESS);
 854 }