contrib/bind/bin/named/config.c

   1 /*
   2  * Copyright (C) 2004-2008  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 /* $Id: config.c,v 1.82.38.8 2008/09/27 23:39:42 jinmei Exp $ */
  19
  20 /*! \file */
  21
  22 #include <config.h>
  23
  24 #include <stdlib.h>
  25
  26 #include <isc/buffer.h>
  27 #include <isc/log.h>
  28 #include <isc/mem.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>
  34 #include <isc/util.h>
  35
  36 #include <isccfg/namedconf.h>
  37
  38 #include <dns/fixedname.h>
  39 #include <dns/name.h>
  40 #include <dns/rdataclass.h>
  41 #include <dns/rdatatype.h>
  42 #include <dns/tsig.h>
  43 #include <dns/zone.h>
  44
  45 #include <named/config.h>
  46 #include <named/globals.h>
  47
  48 /*% default configuration */
  49 static char defaultconf[] = "\
  50 options {\n\
  51 #       blackhole {none;};\n"
  52 #ifndef WIN32
  53 "       coresize default;\n\
  54         datasize default;\n\
  55         files unlimited;\n\
  56         stacksize default;\n"
  57 #endif
  58 "       deallocate-on-exit true;\n\
  59 #       directory <none>\n\
  60         dump-file \"named_dump.db\";\n\
  61         fake-iquery no;\n\
  62         has-old-clients false;\n\
  63         heartbeat-interval 60;\n\
  64         host-statistics no;\n\
  65         interface-interval 60;\n\
  66         listen-on {any;};\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\
  73         port 53;\n\
  74         recursing-file \"named.recursing\";\n\
  75 "
  76 #ifdef PATH_RANDOMDEV
  77 "\
  78         random-device \"" PATH_RANDOMDEV "\";\n\
  79 "
  80 #endif
  81 "\
  82         recursive-clients 1000;\n\
  83         rrset-order {type NS order random; order cyclic; };\n\
  84         serial-queries 20;\n\
  85         serial-query-rate 20;\n\
  86         server-id none;\n\
  87         statistics-file \"named.stats\";\n\
  88         statistics-interval 60;\n\
  89         tcp-clients 100;\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\
  95         transfers-in 10;\n\
  96         transfers-out 10;\n\
  97         treat-cr-as-space true;\n\
  98         use-id-pool true;\n\
  99         use-ixfr true;\n\
 100         edns-udp-size 4096;\n\
 101         max-udp-size 4096;\n\
 102         request-nsid false;\n\
 103         reserved-sockets 512;\n\
 104 \n\
 105         /* view */\n\
 106         allow-notify {none;};\n\
 107         allow-update-forwarding {none;};\n\
 108         allow-query-cache { localnets; localhost; };\n\
 109         allow-query-cache-on { any; };\n\
 110         allow-recursion { localnets; localhost; };\n\
 111         allow-recursion-on { any; };\n\
 112 #       allow-v6-synthesis <obsolete>;\n\
 113 #       sortlist <none>\n\
 114 #       topology <none>\n\
 115         auth-nxdomain false;\n\
 116         minimal-responses false;\n\
 117         recursion true;\n\
 118         provide-ixfr true;\n\
 119         request-ixfr true;\n\
 120         fetch-glue no;\n\
 121         rfc2308-type1 no;\n\
 122         additional-from-auth true;\n\
 123         additional-from-cache true;\n\
 124         query-source address *;\n\
 125         query-source-v6 address *;\n\
 126         notify-source *;\n\
 127         notify-source-v6 *;\n\
 128         cleaning-interval 0;  /* now meaningless */\n\
 129         min-roots 2;\n\
 130         lame-ttl 600;\n\
 131         max-ncache-ttl 10800; /* 3 hours */\n\
 132         max-cache-ttl 604800; /* 1 week */\n\
 133         transfer-format many-answers;\n\
 134         max-cache-size 0;\n\
 135         check-names master fail;\n\
 136         check-names slave warn;\n\
 137         check-names response ignore;\n\
 138         check-mx warn;\n\
 139         acache-enable no;\n\
 140         acache-cleaning-interval 60;\n\
 141         max-acache-size 16M;\n\
 142         dnssec-enable yes;\n\
 143         dnssec-validation yes; \n\
 144         dnssec-accept-expired no;\n\
 145         clients-per-query 10;\n\
 146         max-clients-per-query 100;\n\
 147         zero-no-soa-ttl-cache no;\n\
 148 "
 149
 150 "       /* zone */\n\
 151         allow-query {any;};\n\
 152         allow-query-on {any;};\n\
 153         allow-transfer {any;};\n\
 154         notify yes;\n\
 155 #       also-notify <none>\n\
 156         notify-delay 5;\n\
 157         notify-to-soa no;\n\
 158         dialup no;\n\
 159 #       forward <none>\n\
 160 #       forwarders <none>\n\
 161         maintain-ixfr-base no;\n\
 162 #       max-ixfr-log-size <obsolete>\n\
 163         transfer-source *;\n\
 164         transfer-source-v6 *;\n\
 165         alt-transfer-source *;\n\
 166         alt-transfer-source-v6 *;\n\
 167         max-transfer-time-in 120;\n\
 168         max-transfer-time-out 120;\n\
 169         max-transfer-idle-in 60;\n\
 170         max-transfer-idle-out 60;\n\
 171         max-retry-time 1209600; /* 2 weeks */\n\
 172         min-retry-time 500;\n\
 173         max-refresh-time 2419200; /* 4 weeks */\n\
 174         min-refresh-time 300;\n\
 175         multi-master no;\n\
 176         sig-validity-interval 30; /* days */\n\
 177         zone-statistics false;\n\
 178         max-journal-size unlimited;\n\
 179         ixfr-from-differences false;\n\
 180         check-wildcard yes;\n\
 181         check-sibling yes;\n\
 182         check-integrity yes;\n\
 183         check-mx-cname warn;\n\
 184         check-srv-cname warn;\n\
 185         zero-no-soa-ttl yes;\n\
 186         update-check-ksk yes;\n\
 187         try-tcp-refresh yes; /* BIND 8 compat */\n\
 188 };\n\
 189 "
 190
 191 "#\n\
 192 #  Zones in the \"_bind\" view are NOT counted in the count of zones.\n\
 193 #\n\
 194 view \"_bind\" chaos {\n\
 195         recursion no;\n\
 196         notify no;\n\
 197 \n\
 198         zone \"version.bind\" chaos {\n\
 199                 type master;\n\
 200                 database \"_builtin version\";\n\
 201         };\n\
 202 \n\
 203         zone \"hostname.bind\" chaos {\n\
 204                 type master;\n\
 205                 database \"_builtin hostname\";\n\
 206         };\n\
 207 \n\
 208         zone \"authors.bind\" chaos {\n\
 209                 type master;\n\
 210                 database \"_builtin authors\";\n\
 211         };\n\
 212         zone \"id.server\" chaos {\n\
 213                 type master;\n\
 214                 database \"_builtin id\";\n\
 215         };\n\
 216 };\n\
 217 ";
 218
 219 isc_result_t
 220 ns_config_parsedefaults(cfg_parser_t *parser, cfg_obj_t **conf) {
 221         isc_buffer_t b;
 222
 223         isc_buffer_init(&b, defaultconf, sizeof(defaultconf) - 1);
 224         isc_buffer_add(&b, sizeof(defaultconf) - 1);
 225         return (cfg_parse_buffer(parser, &b, &cfg_type_namedconf, conf));
 226 }
 227
 228 isc_result_t
 229 ns_config_get(const cfg_obj_t **maps, const char *name, const cfg_obj_t **obj) {
 230         int i;
 231
 232         for (i = 0;; i++) {
 233                 if (maps[i] == NULL)
 234                         return (ISC_R_NOTFOUND);
 235                 if (cfg_map_get(maps[i], name, obj) == ISC_R_SUCCESS)
 236                         return (ISC_R_SUCCESS);
 237         }
 238 }
 239
 240 isc_result_t
 241 ns_checknames_get(const cfg_obj_t **maps, const char *which,
 242                   const cfg_obj_t **obj)
 243 {
 244         const cfg_listelt_t *element;
 245         const cfg_obj_t *checknames;
 246         const cfg_obj_t *type;
 247         const cfg_obj_t *value;
 248         int i;
 249
 250         for (i = 0;; i++) {
 251                 if (maps[i] == NULL)
 252                         return (ISC_R_NOTFOUND);
 253                 checknames = NULL;
 254                 if (cfg_map_get(maps[i], "check-names", &checknames) == ISC_R_SUCCESS) {
 255                         /*
 256                          * Zone map entry is not a list.
 257                          */
 258                         if (checknames != NULL && !cfg_obj_islist(checknames)) {
 259                                 *obj = checknames;
 260                                 return (ISC_R_SUCCESS);
 261                         }
 262                         for (element = cfg_list_first(checknames);
 263                              element != NULL;
 264                              element = cfg_list_next(element)) {
 265                                 value = cfg_listelt_value(element);
 266                                 type = cfg_tuple_get(value, "type");
 267                                 if (strcasecmp(cfg_obj_asstring(type), which) == 0) {
 268                                         *obj = cfg_tuple_get(value, "mode");
 269                                         return (ISC_R_SUCCESS);
 270                                 }
 271                         }
 272
 273                 }
 274         }
 275 }
 276
 277 int
 278 ns_config_listcount(const cfg_obj_t *list) {
 279         const cfg_listelt_t *e;
 280         int i = 0;
 281
 282         for (e = cfg_list_first(list); e != NULL; e = cfg_list_next(e))
 283                 i++;
 284
 285         return (i);
 286 }
 287
 288 isc_result_t
 289 ns_config_getclass(const cfg_obj_t *classobj, dns_rdataclass_t defclass,
 290                    dns_rdataclass_t *classp) {
 291         isc_textregion_t r;
 292         isc_result_t result;
 293
 294         if (!cfg_obj_isstring(classobj)) {
 295                 *classp = defclass;
 296                 return (ISC_R_SUCCESS);
 297         }
 298         DE_CONST(cfg_obj_asstring(classobj), r.base);
 299         r.length = strlen(r.base);
 300         result = dns_rdataclass_fromtext(classp, &r);
 301         if (result != ISC_R_SUCCESS)
 302                 cfg_obj_log(classobj, ns_g_lctx, ISC_LOG_ERROR,
 303                             "unknown class '%s'", r.base);
 304         return (result);
 305 }
 306
 307 isc_result_t
 308 ns_config_gettype(const cfg_obj_t *typeobj, dns_rdatatype_t deftype,
 309                    dns_rdatatype_t *typep) {
 310         isc_textregion_t r;
 311         isc_result_t result;
 312
 313         if (!cfg_obj_isstring(typeobj)) {
 314                 *typep = deftype;
 315                 return (ISC_R_SUCCESS);
 316         }
 317         DE_CONST(cfg_obj_asstring(typeobj), r.base);
 318         r.length = strlen(r.base);
 319         result = dns_rdatatype_fromtext(typep, &r);
 320         if (result != ISC_R_SUCCESS)
 321                 cfg_obj_log(typeobj, ns_g_lctx, ISC_LOG_ERROR,
 322                             "unknown type '%s'", r.base);
 323         return (result);
 324 }
 325
 326 dns_zonetype_t
 327 ns_config_getzonetype(const cfg_obj_t *zonetypeobj) {
 328         dns_zonetype_t ztype = dns_zone_none;
 329         const char *str;
 330
 331         str = cfg_obj_asstring(zonetypeobj);
 332         if (strcasecmp(str, "master") == 0)
 333                 ztype = dns_zone_master;
 334         else if (strcasecmp(str, "slave") == 0)
 335                 ztype = dns_zone_slave;
 336         else if (strcasecmp(str, "stub") == 0)
 337                 ztype = dns_zone_stub;
 338         else
 339                 INSIST(0);
 340         return (ztype);
 341 }
 342
 343 isc_result_t
 344 ns_config_getiplist(const cfg_obj_t *config, const cfg_obj_t *list,
 345                     in_port_t defport, isc_mem_t *mctx,
 346                     isc_sockaddr_t **addrsp, isc_uint32_t *countp)
 347 {
 348         int count, i = 0;
 349         const cfg_obj_t *addrlist;
 350         const cfg_obj_t *portobj;
 351         const cfg_listelt_t *element;
 352         isc_sockaddr_t *addrs;
 353         in_port_t port;
 354         isc_result_t result;
 355
 356         INSIST(addrsp != NULL && *addrsp == NULL);
 357         INSIST(countp != NULL);
 358
 359         addrlist = cfg_tuple_get(list, "addresses");
 360         count = ns_config_listcount(addrlist);
 361
 362         portobj = cfg_tuple_get(list, "port");
 363         if (cfg_obj_isuint32(portobj)) {
 364                 isc_uint32_t val = cfg_obj_asuint32(portobj);
 365                 if (val > ISC_UINT16_MAX) {
 366                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 367                                     "port '%u' out of range", val);
 368                         return (ISC_R_RANGE);
 369                 }
 370                 port = (in_port_t) val;
 371         } else if (defport != 0)
 372                 port = defport;
 373         else {
 374                 result = ns_config_getport(config, &port);
 375                 if (result != ISC_R_SUCCESS)
 376                         return (result);
 377         }
 378
 379         addrs = isc_mem_get(mctx, count * sizeof(isc_sockaddr_t));
 380         if (addrs == NULL)
 381                 return (ISC_R_NOMEMORY);
 382
 383         for (element = cfg_list_first(addrlist);
 384              element != NULL;
 385              element = cfg_list_next(element), i++)
 386         {
 387                 INSIST(i < count);
 388                 addrs[i] = *cfg_obj_assockaddr(cfg_listelt_value(element));
 389                 if (isc_sockaddr_getport(&addrs[i]) == 0)
 390                         isc_sockaddr_setport(&addrs[i], port);
 391         }
 392         INSIST(i == count);
 393
 394         *addrsp = addrs;
 395         *countp = count;
 396
 397         return (ISC_R_SUCCESS);
 398 }
 399
 400 void
 401 ns_config_putiplist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 402                     isc_uint32_t count)
 403 {
 404         INSIST(addrsp != NULL && *addrsp != NULL);
 405
 406         isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
 407         *addrsp = NULL;
 408 }
 409
 410 static isc_result_t
 411 get_masters_def(const cfg_obj_t *cctx, const char *name,
 412                 const cfg_obj_t **ret)
 413 {
 414         isc_result_t result;
 415         const cfg_obj_t *masters = NULL;
 416         const cfg_listelt_t *elt;
 417
 418         result = cfg_map_get(cctx, "masters", &masters);
 419         if (result != ISC_R_SUCCESS)
 420                 return (result);
 421         for (elt = cfg_list_first(masters);
 422              elt != NULL;
 423              elt = cfg_list_next(elt)) {
 424                 const cfg_obj_t *list;
 425                 const char *listname;
 426
 427                 list = cfg_listelt_value(elt);
 428                 listname = cfg_obj_asstring(cfg_tuple_get(list, "name"));
 429
 430                 if (strcasecmp(listname, name) == 0) {
 431                         *ret = list;
 432                         return (ISC_R_SUCCESS);
 433                 }
 434         }
 435         return (ISC_R_NOTFOUND);
 436 }
 437
 438 isc_result_t
 439 ns_config_getipandkeylist(const cfg_obj_t *config, const cfg_obj_t *list,
 440                           isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 441                           dns_name_t ***keysp, isc_uint32_t *countp)
 442 {
 443         isc_uint32_t addrcount = 0, keycount = 0, i = 0;
 444         isc_uint32_t listcount = 0, l = 0, j;
 445         isc_uint32_t stackcount = 0, pushed = 0;
 446         isc_result_t result;
 447         const cfg_listelt_t *element;
 448         const cfg_obj_t *addrlist;
 449         const cfg_obj_t *portobj;
 450         in_port_t port;
 451         dns_fixedname_t fname;
 452         isc_sockaddr_t *addrs = NULL;
 453         dns_name_t **keys = NULL;
 454         struct { const char *name; } *lists = NULL;
 455         struct {
 456                 const cfg_listelt_t *element;
 457                 in_port_t port;
 458         } *stack = NULL;
 459
 460         REQUIRE(addrsp != NULL && *addrsp == NULL);
 461         REQUIRE(keysp != NULL && *keysp == NULL);
 462         REQUIRE(countp != NULL);
 463
 464  newlist:
 465         addrlist = cfg_tuple_get(list, "addresses");
 466         portobj = cfg_tuple_get(list, "port");
 467         if (cfg_obj_isuint32(portobj)) {
 468                 isc_uint32_t val = cfg_obj_asuint32(portobj);
 469                 if (val > ISC_UINT16_MAX) {
 470                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 471                                     "port '%u' out of range", val);
 472                         result = ISC_R_RANGE;
 473                         goto cleanup;
 474                 }
 475                 port = (in_port_t) val;
 476         } else {
 477                 result = ns_config_getport(config, &port);
 478                 if (result != ISC_R_SUCCESS)
 479                         goto cleanup;
 480         }
 481
 482         result = ISC_R_NOMEMORY;
 483
 484         element = cfg_list_first(addrlist);
 485  resume:
 486         for ( ;
 487              element != NULL;
 488              element = cfg_list_next(element))
 489         {
 490                 const cfg_obj_t *addr;
 491                 const cfg_obj_t *key;
 492                 const char *keystr;
 493                 isc_buffer_t b;
 494
 495                 addr = cfg_tuple_get(cfg_listelt_value(element),
 496                                      "masterselement");
 497                 key = cfg_tuple_get(cfg_listelt_value(element), "key");
 498
 499                 if (!cfg_obj_issockaddr(addr)) {
 500                         const char *listname = cfg_obj_asstring(addr);
 501                         isc_result_t tresult;
 502
 503                         /* Grow lists? */
 504                         if (listcount == l) {
 505                                 void * new;
 506                                 isc_uint32_t newlen = listcount + 16;
 507                                 size_t newsize, oldsize;
 508
 509                                 newsize = newlen * sizeof(*lists);
 510                                 oldsize = listcount * sizeof(*lists);
 511                                 new = isc_mem_get(mctx, newsize);
 512                                 if (new == NULL)
 513                                         goto cleanup;
 514                                 if (listcount != 0) {
 515                                         memcpy(new, lists, oldsize);
 516                                         isc_mem_put(mctx, lists, oldsize);
 517                                 }
 518                                 lists = new;
 519                                 listcount = newlen;
 520                         }
 521                         /* Seen? */
 522                         for (j = 0; j < l; j++)
 523                                 if (strcasecmp(lists[j].name, listname) == 0)
 524                                         break;
 525                         if (j < l)
 526                                 continue;
 527                         tresult = get_masters_def(config, listname, &list);
 528                         if (tresult == ISC_R_NOTFOUND) {
 529                                 cfg_obj_log(addr, ns_g_lctx, ISC_LOG_ERROR,
 530                                     "masters \"%s\" not found", listname);
 531
 532                                 result = tresult;
 533                                 goto cleanup;
 534                         }
 535                         if (tresult != ISC_R_SUCCESS)
 536                                 goto cleanup;
 537                         lists[l++].name = listname;
 538                         /* Grow stack? */
 539                         if (stackcount == pushed) {
 540                                 void * new;
 541                                 isc_uint32_t newlen = stackcount + 16;
 542                                 size_t newsize, oldsize;
 543
 544                                 newsize = newlen * sizeof(*stack);
 545                                 oldsize = stackcount * sizeof(*stack);
 546                                 new = isc_mem_get(mctx, newsize);
 547                                 if (new == NULL)
 548                                         goto cleanup;
 549                                 if (stackcount != 0) {
 550                                         memcpy(new, stack, oldsize);
 551                                         isc_mem_put(mctx, stack, oldsize);
 552                                 }
 553                                 stack = new;
 554                                 stackcount = newlen;
 555                         }
 556                         /*
 557                          * We want to resume processing this list on the
 558                          * next element.
 559                          */
 560                         stack[pushed].element = cfg_list_next(element);
 561                         stack[pushed].port = port;
 562                         pushed++;
 563                         goto newlist;
 564                 }
 565
 566                 if (i == addrcount) {
 567                         void * new;
 568                         isc_uint32_t newlen = addrcount + 16;
 569                         size_t newsize, oldsize;
 570
 571                         newsize = newlen * sizeof(isc_sockaddr_t);
 572                         oldsize = addrcount * sizeof(isc_sockaddr_t);
 573                         new = isc_mem_get(mctx, newsize);
 574                         if (new == NULL)
 575                                 goto cleanup;
 576                         if (addrcount != 0) {
 577                                 memcpy(new, addrs, oldsize);
 578                                 isc_mem_put(mctx, addrs, oldsize);
 579                         }
 580                         addrs = new;
 581                         addrcount = newlen;
 582
 583                         newsize = newlen * sizeof(dns_name_t *);
 584                         oldsize = keycount * sizeof(dns_name_t *);
 585                         new = isc_mem_get(mctx, newsize);
 586                         if (new == NULL)
 587                                 goto cleanup;
 588                         if (keycount != 0) {
 589                                 memcpy(new, keys, oldsize);
 590                                 isc_mem_put(mctx, keys, oldsize);
 591                         }
 592                         keys = new;
 593                         keycount = newlen;
 594                 }
 595
 596                 addrs[i] = *cfg_obj_assockaddr(addr);
 597                 if (isc_sockaddr_getport(&addrs[i]) == 0)
 598                         isc_sockaddr_setport(&addrs[i], port);
 599                 keys[i] = NULL;
 600                 if (!cfg_obj_isstring(key)) {
 601                         i++;
 602                         continue;
 603                 }
 604                 keys[i] = isc_mem_get(mctx, sizeof(dns_name_t));
 605                 if (keys[i] == NULL)
 606                         goto cleanup;
 607                 dns_name_init(keys[i], NULL);
 608
 609                 keystr = cfg_obj_asstring(key);
 610                 isc_buffer_init(&b, keystr, strlen(keystr));
 611                 isc_buffer_add(&b, strlen(keystr));
 612                 dns_fixedname_init(&fname);
 613                 result = dns_name_fromtext(dns_fixedname_name(&fname), &b,
 614                                            dns_rootname, ISC_FALSE, NULL);
 615                 if (result != ISC_R_SUCCESS)
 616                         goto cleanup;
 617                 result = dns_name_dup(dns_fixedname_name(&fname), mctx,
 618                                       keys[i]);
 619                 if (result != ISC_R_SUCCESS)
 620                         goto cleanup;
 621                 i++;
 622         }
 623         if (pushed != 0) {
 624                 pushed--;
 625                 element = stack[pushed].element;
 626                 port = stack[pushed].port;
 627                 goto resume;
 628         }
 629         if (i < addrcount) {
 630                 void * new;
 631                 size_t newsize, oldsize;
 632
 633                 newsize = i * sizeof(isc_sockaddr_t);
 634                 oldsize = addrcount * sizeof(isc_sockaddr_t);
 635                 if (i != 0) {
 636                         new = isc_mem_get(mctx, newsize);
 637                         if (new == NULL)
 638                                 goto cleanup;
 639                         memcpy(new, addrs, newsize);
 640                 } else
 641                         new = NULL;
 642                 isc_mem_put(mctx, addrs, oldsize);
 643                 addrs = new;
 644                 addrcount = i;
 645
 646                 newsize = i * sizeof(dns_name_t *);
 647                 oldsize = keycount * sizeof(dns_name_t *);
 648                 if (i != 0) {
 649                         new = isc_mem_get(mctx, newsize);
 650                         if (new == NULL)
 651                                 goto cleanup;
 652                         memcpy(new, keys,  newsize);
 653                 } else
 654                         new = NULL;
 655                 isc_mem_put(mctx, keys, oldsize);
 656                 keys = new;
 657                 keycount = i;
 658         }
 659
 660         if (lists != NULL)
 661                 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
 662         if (stack != NULL)
 663                 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
 664
 665         INSIST(keycount == addrcount);
 666
 667         *addrsp = addrs;
 668         *keysp = keys;
 669         *countp = addrcount;
 670
 671         return (ISC_R_SUCCESS);
 672
 673  cleanup:
 674         if (addrs != NULL)
 675                 isc_mem_put(mctx, addrs, addrcount * sizeof(isc_sockaddr_t));
 676         if (keys != NULL) {
 677                 for (j = 0; j <= i; j++) {
 678                         if (keys[j] == NULL)
 679                                 continue;
 680                         if (dns_name_dynamic(keys[j]))
 681                                 dns_name_free(keys[j], mctx);
 682                         isc_mem_put(mctx, keys[j], sizeof(dns_name_t));
 683                 }
 684                 isc_mem_put(mctx, keys, keycount * sizeof(dns_name_t *));
 685         }
 686         if (lists != NULL)
 687                 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
 688         if (stack != NULL)
 689                 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
 690         return (result);
 691 }
 692
 693 void
 694 ns_config_putipandkeylist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 695                           dns_name_t ***keysp, isc_uint32_t count)
 696 {
 697         unsigned int i;
 698         dns_name_t **keys = *keysp;
 699
 700         INSIST(addrsp != NULL && *addrsp != NULL);
 701
 702         isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
 703         for (i = 0; i < count; i++) {
 704                 if (keys[i] == NULL)
 705                         continue;
 706                 if (dns_name_dynamic(keys[i]))
 707                         dns_name_free(keys[i], mctx);
 708                 isc_mem_put(mctx, keys[i], sizeof(dns_name_t));
 709         }
 710         isc_mem_put(mctx, *keysp, count * sizeof(dns_name_t *));
 711         *addrsp = NULL;
 712         *keysp = NULL;
 713 }
 714
 715 isc_result_t
 716 ns_config_getport(const cfg_obj_t *config, in_port_t *portp) {
 717         const cfg_obj_t *maps[3];
 718         const cfg_obj_t *options = NULL;
 719         const cfg_obj_t *portobj = NULL;
 720         isc_result_t result;
 721         int i;
 722
 723         (void)cfg_map_get(config, "options", &options);
 724         i = 0;
 725         if (options != NULL)
 726                 maps[i++] = options;
 727         maps[i++] = ns_g_defaults;
 728         maps[i] = NULL;
 729
 730         result = ns_config_get(maps, "port", &portobj);
 731         INSIST(result == ISC_R_SUCCESS);
 732         if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
 733                 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 734                             "port '%u' out of range",
 735                             cfg_obj_asuint32(portobj));
 736                 return (ISC_R_RANGE);
 737         }
 738         *portp = (in_port_t)cfg_obj_asuint32(portobj);
 739         return (ISC_R_SUCCESS);
 740 }
 741
 742 struct keyalgorithms {
 743         const char *str;
 744         enum { hmacnone, hmacmd5, hmacsha1, hmacsha224,
 745                hmacsha256, hmacsha384, hmacsha512 } hmac;
 746         isc_uint16_t size;
 747 } algorithms[] = {
 748         { "hmac-md5", hmacmd5, 128 },
 749         { "hmac-md5.sig-alg.reg.int", hmacmd5, 0 },
 750         { "hmac-md5.sig-alg.reg.int.", hmacmd5, 0 },
 751         { "hmac-sha1", hmacsha1, 160 },
 752         { "hmac-sha224", hmacsha224, 224 },
 753         { "hmac-sha256", hmacsha256, 256 },
 754         { "hmac-sha384", hmacsha384, 384 },
 755         { "hmac-sha512", hmacsha512, 512 },
 756         {  NULL, hmacnone, 0 }
 757 };
 758
 759 isc_result_t
 760 ns_config_getkeyalgorithm(const char *str, dns_name_t **name,
 761                           isc_uint16_t *digestbits)
 762 {
 763         int i;
 764         size_t len = 0;
 765         isc_uint16_t bits;
 766         isc_result_t result;
 767
 768         for (i = 0; algorithms[i].str != NULL; i++) {
 769                 len = strlen(algorithms[i].str);
 770                 if (strncasecmp(algorithms[i].str, str, len) == 0 &&
 771                     (str[len] == '\0' ||
 772                      (algorithms[i].size != 0 && str[len] == '-')))
 773                         break;
 774         }
 775         if (algorithms[i].str == NULL)
 776                 return (ISC_R_NOTFOUND);
 777         if (str[len] == '-') {
 778                 result = isc_parse_uint16(&bits, str + len + 1, 10);
 779                 if (result != ISC_R_SUCCESS)
 780                         return (result);
 781                 if (bits > algorithms[i].size)
 782                         return (ISC_R_RANGE);
 783         } else if (algorithms[i].size == 0)
 784                 bits = 128;
 785         else
 786                 bits = algorithms[i].size;
 787
 788         if (name != NULL) {
 789                 switch (algorithms[i].hmac) {
 790                 case hmacmd5: *name = dns_tsig_hmacmd5_name; break;
 791                 case hmacsha1: *name = dns_tsig_hmacsha1_name; break;
 792                 case hmacsha224: *name = dns_tsig_hmacsha224_name; break;
 793                 case hmacsha256: *name = dns_tsig_hmacsha256_name; break;
 794                 case hmacsha384: *name = dns_tsig_hmacsha384_name; break;
 795                 case hmacsha512: *name = dns_tsig_hmacsha512_name; break;
 796                 default:
 797                         INSIST(0);
 798                 }
 799         }
 800         if (digestbits != NULL)
 801                 *digestbits = bits;
 802         return (ISC_R_SUCCESS);
 803 }