contrib/bind9/bin/named/config.c

   1 /*
   2  * Copyright (C) 2004-2009  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 1.93.14.2 2009/03/17 23:47:28 tbox 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 "/run/named/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         nsec3-test-zone no;\n\
 149 "
 150
 151 "       /* zone */\n\
 152         allow-query {any;};\n\
 153         allow-query-on {any;};\n\
 154         allow-transfer {any;};\n\
 155         notify yes;\n\
 156 #       also-notify <none>\n\
 157         notify-delay 5;\n\
 158         notify-to-soa no;\n\
 159         dialup no;\n\
 160 #       forward <none>\n\
 161 #       forwarders <none>\n\
 162         maintain-ixfr-base no;\n\
 163 #       max-ixfr-log-size <obsolete>\n\
 164         transfer-source *;\n\
 165         transfer-source-v6 *;\n\
 166         alt-transfer-source *;\n\
 167         alt-transfer-source-v6 *;\n\
 168         max-transfer-time-in 120;\n\
 169         max-transfer-time-out 120;\n\
 170         max-transfer-idle-in 60;\n\
 171         max-transfer-idle-out 60;\n\
 172         max-retry-time 1209600; /* 2 weeks */\n\
 173         min-retry-time 500;\n\
 174         max-refresh-time 2419200; /* 4 weeks */\n\
 175         min-refresh-time 300;\n\
 176         multi-master no;\n\
 177         sig-validity-interval 30; /* days */\n\
 178         sig-signing-nodes 100;\n\
 179         sig-signing-signatures 10;\n\
 180         sig-signing-type 65534;\n\
 181         zone-statistics false;\n\
 182         max-journal-size unlimited;\n\
 183         ixfr-from-differences false;\n\
 184         check-wildcard yes;\n\
 185         check-sibling yes;\n\
 186         check-integrity yes;\n\
 187         check-mx-cname warn;\n\
 188         check-srv-cname warn;\n\
 189         zero-no-soa-ttl yes;\n\
 190         update-check-ksk yes;\n\
 191         try-tcp-refresh yes; /* BIND 8 compat */\n\
 192 };\n\
 193 "
 194
 195 "#\n\
 196 #  Zones in the \"_bind\" view are NOT counted in the count of zones.\n\
 197 #\n\
 198 view \"_bind\" chaos {\n\
 199         recursion no;\n\
 200         notify no;\n\
 201 \n\
 202         zone \"version.bind\" chaos {\n\
 203                 type master;\n\
 204                 database \"_builtin version\";\n\
 205         };\n\
 206 \n\
 207         zone \"hostname.bind\" chaos {\n\
 208                 type master;\n\
 209                 database \"_builtin hostname\";\n\
 210         };\n\
 211 \n\
 212         zone \"authors.bind\" chaos {\n\
 213                 type master;\n\
 214                 database \"_builtin authors\";\n\
 215         };\n\
 216         zone \"id.server\" chaos {\n\
 217                 type master;\n\
 218                 database \"_builtin id\";\n\
 219         };\n\
 220 };\n\
 221 ";
 222
 223 isc_result_t
 224 ns_config_parsedefaults(cfg_parser_t *parser, cfg_obj_t **conf) {
 225         isc_buffer_t b;
 226
 227         isc_buffer_init(&b, defaultconf, sizeof(defaultconf) - 1);
 228         isc_buffer_add(&b, sizeof(defaultconf) - 1);
 229         return (cfg_parse_buffer(parser, &b, &cfg_type_namedconf, conf));
 230 }
 231
 232 isc_result_t
 233 ns_config_get(const cfg_obj_t **maps, const char *name, const cfg_obj_t **obj) {
 234         int i;
 235
 236         for (i = 0;; i++) {
 237                 if (maps[i] == NULL)
 238                         return (ISC_R_NOTFOUND);
 239                 if (cfg_map_get(maps[i], name, obj) == ISC_R_SUCCESS)
 240                         return (ISC_R_SUCCESS);
 241         }
 242 }
 243
 244 isc_result_t
 245 ns_checknames_get(const cfg_obj_t **maps, const char *which,
 246                   const cfg_obj_t **obj)
 247 {
 248         const cfg_listelt_t *element;
 249         const cfg_obj_t *checknames;
 250         const cfg_obj_t *type;
 251         const cfg_obj_t *value;
 252         int i;
 253
 254         for (i = 0;; i++) {
 255                 if (maps[i] == NULL)
 256                         return (ISC_R_NOTFOUND);
 257                 checknames = NULL;
 258                 if (cfg_map_get(maps[i], "check-names", &checknames) == ISC_R_SUCCESS) {
 259                         /*
 260                          * Zone map entry is not a list.
 261                          */
 262                         if (checknames != NULL && !cfg_obj_islist(checknames)) {
 263                                 *obj = checknames;
 264                                 return (ISC_R_SUCCESS);
 265                         }
 266                         for (element = cfg_list_first(checknames);
 267                              element != NULL;
 268                              element = cfg_list_next(element)) {
 269                                 value = cfg_listelt_value(element);
 270                                 type = cfg_tuple_get(value, "type");
 271                                 if (strcasecmp(cfg_obj_asstring(type), which) == 0) {
 272                                         *obj = cfg_tuple_get(value, "mode");
 273                                         return (ISC_R_SUCCESS);
 274                                 }
 275                         }
 276
 277                 }
 278         }
 279 }
 280
 281 int
 282 ns_config_listcount(const cfg_obj_t *list) {
 283         const cfg_listelt_t *e;
 284         int i = 0;
 285
 286         for (e = cfg_list_first(list); e != NULL; e = cfg_list_next(e))
 287                 i++;
 288
 289         return (i);
 290 }
 291
 292 isc_result_t
 293 ns_config_getclass(const cfg_obj_t *classobj, dns_rdataclass_t defclass,
 294                    dns_rdataclass_t *classp) {
 295         isc_textregion_t r;
 296         isc_result_t result;
 297
 298         if (!cfg_obj_isstring(classobj)) {
 299                 *classp = defclass;
 300                 return (ISC_R_SUCCESS);
 301         }
 302         DE_CONST(cfg_obj_asstring(classobj), r.base);
 303         r.length = strlen(r.base);
 304         result = dns_rdataclass_fromtext(classp, &r);
 305         if (result != ISC_R_SUCCESS)
 306                 cfg_obj_log(classobj, ns_g_lctx, ISC_LOG_ERROR,
 307                             "unknown class '%s'", r.base);
 308         return (result);
 309 }
 310
 311 isc_result_t
 312 ns_config_gettype(const cfg_obj_t *typeobj, dns_rdatatype_t deftype,
 313                    dns_rdatatype_t *typep) {
 314         isc_textregion_t r;
 315         isc_result_t result;
 316
 317         if (!cfg_obj_isstring(typeobj)) {
 318                 *typep = deftype;
 319                 return (ISC_R_SUCCESS);
 320         }
 321         DE_CONST(cfg_obj_asstring(typeobj), r.base);
 322         r.length = strlen(r.base);
 323         result = dns_rdatatype_fromtext(typep, &r);
 324         if (result != ISC_R_SUCCESS)
 325                 cfg_obj_log(typeobj, ns_g_lctx, ISC_LOG_ERROR,
 326                             "unknown type '%s'", r.base);
 327         return (result);
 328 }
 329
 330 dns_zonetype_t
 331 ns_config_getzonetype(const cfg_obj_t *zonetypeobj) {
 332         dns_zonetype_t ztype = dns_zone_none;
 333         const char *str;
 334
 335         str = cfg_obj_asstring(zonetypeobj);
 336         if (strcasecmp(str, "master") == 0)
 337                 ztype = dns_zone_master;
 338         else if (strcasecmp(str, "slave") == 0)
 339                 ztype = dns_zone_slave;
 340         else if (strcasecmp(str, "stub") == 0)
 341                 ztype = dns_zone_stub;
 342         else
 343                 INSIST(0);
 344         return (ztype);
 345 }
 346
 347 isc_result_t
 348 ns_config_getiplist(const cfg_obj_t *config, const cfg_obj_t *list,
 349                     in_port_t defport, isc_mem_t *mctx,
 350                     isc_sockaddr_t **addrsp, isc_uint32_t *countp)
 351 {
 352         int count, i = 0;
 353         const cfg_obj_t *addrlist;
 354         const cfg_obj_t *portobj;
 355         const cfg_listelt_t *element;
 356         isc_sockaddr_t *addrs;
 357         in_port_t port;
 358         isc_result_t result;
 359
 360         INSIST(addrsp != NULL && *addrsp == NULL);
 361         INSIST(countp != NULL);
 362
 363         addrlist = cfg_tuple_get(list, "addresses");
 364         count = ns_config_listcount(addrlist);
 365
 366         portobj = cfg_tuple_get(list, "port");
 367         if (cfg_obj_isuint32(portobj)) {
 368                 isc_uint32_t val = cfg_obj_asuint32(portobj);
 369                 if (val > ISC_UINT16_MAX) {
 370                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 371                                     "port '%u' out of range", val);
 372                         return (ISC_R_RANGE);
 373                 }
 374                 port = (in_port_t) val;
 375         } else if (defport != 0)
 376                 port = defport;
 377         else {
 378                 result = ns_config_getport(config, &port);
 379                 if (result != ISC_R_SUCCESS)
 380                         return (result);
 381         }
 382
 383         addrs = isc_mem_get(mctx, count * sizeof(isc_sockaddr_t));
 384         if (addrs == NULL)
 385                 return (ISC_R_NOMEMORY);
 386
 387         for (element = cfg_list_first(addrlist);
 388              element != NULL;
 389              element = cfg_list_next(element), i++)
 390         {
 391                 INSIST(i < count);
 392                 addrs[i] = *cfg_obj_assockaddr(cfg_listelt_value(element));
 393                 if (isc_sockaddr_getport(&addrs[i]) == 0)
 394                         isc_sockaddr_setport(&addrs[i], port);
 395         }
 396         INSIST(i == count);
 397
 398         *addrsp = addrs;
 399         *countp = count;
 400
 401         return (ISC_R_SUCCESS);
 402 }
 403
 404 void
 405 ns_config_putiplist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 406                     isc_uint32_t count)
 407 {
 408         INSIST(addrsp != NULL && *addrsp != NULL);
 409
 410         isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
 411         *addrsp = NULL;
 412 }
 413
 414 static isc_result_t
 415 get_masters_def(const cfg_obj_t *cctx, const char *name,
 416                 const cfg_obj_t **ret)
 417 {
 418         isc_result_t result;
 419         const cfg_obj_t *masters = NULL;
 420         const cfg_listelt_t *elt;
 421
 422         result = cfg_map_get(cctx, "masters", &masters);
 423         if (result != ISC_R_SUCCESS)
 424                 return (result);
 425         for (elt = cfg_list_first(masters);
 426              elt != NULL;
 427              elt = cfg_list_next(elt)) {
 428                 const cfg_obj_t *list;
 429                 const char *listname;
 430
 431                 list = cfg_listelt_value(elt);
 432                 listname = cfg_obj_asstring(cfg_tuple_get(list, "name"));
 433
 434                 if (strcasecmp(listname, name) == 0) {
 435                         *ret = list;
 436                         return (ISC_R_SUCCESS);
 437                 }
 438         }
 439         return (ISC_R_NOTFOUND);
 440 }
 441
 442 isc_result_t
 443 ns_config_getipandkeylist(const cfg_obj_t *config, const cfg_obj_t *list,
 444                           isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 445                           dns_name_t ***keysp, isc_uint32_t *countp)
 446 {
 447         isc_uint32_t addrcount = 0, keycount = 0, i = 0;
 448         isc_uint32_t listcount = 0, l = 0, j;
 449         isc_uint32_t stackcount = 0, pushed = 0;
 450         isc_result_t result;
 451         const cfg_listelt_t *element;
 452         const cfg_obj_t *addrlist;
 453         const cfg_obj_t *portobj;
 454         in_port_t port;
 455         dns_fixedname_t fname;
 456         isc_sockaddr_t *addrs = NULL;
 457         dns_name_t **keys = NULL;
 458         struct { const char *name; } *lists = NULL;
 459         struct {
 460                 const cfg_listelt_t *element;
 461                 in_port_t port;
 462         } *stack = NULL;
 463
 464         REQUIRE(addrsp != NULL && *addrsp == NULL);
 465         REQUIRE(keysp != NULL && *keysp == NULL);
 466         REQUIRE(countp != NULL);
 467
 468  newlist:
 469         addrlist = cfg_tuple_get(list, "addresses");
 470         portobj = cfg_tuple_get(list, "port");
 471         if (cfg_obj_isuint32(portobj)) {
 472                 isc_uint32_t val = cfg_obj_asuint32(portobj);
 473                 if (val > ISC_UINT16_MAX) {
 474                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 475                                     "port '%u' out of range", val);
 476                         result = ISC_R_RANGE;
 477                         goto cleanup;
 478                 }
 479                 port = (in_port_t) val;
 480         } else {
 481                 result = ns_config_getport(config, &port);
 482                 if (result != ISC_R_SUCCESS)
 483                         goto cleanup;
 484         }
 485
 486         result = ISC_R_NOMEMORY;
 487
 488         element = cfg_list_first(addrlist);
 489  resume:
 490         for ( ;
 491              element != NULL;
 492              element = cfg_list_next(element))
 493         {
 494                 const cfg_obj_t *addr;
 495                 const cfg_obj_t *key;
 496                 const char *keystr;
 497                 isc_buffer_t b;
 498
 499                 addr = cfg_tuple_get(cfg_listelt_value(element),
 500                                      "masterselement");
 501                 key = cfg_tuple_get(cfg_listelt_value(element), "key");
 502
 503                 if (!cfg_obj_issockaddr(addr)) {
 504                         const char *listname = cfg_obj_asstring(addr);
 505                         isc_result_t tresult;
 506
 507                         /* Grow lists? */
 508                         if (listcount == l) {
 509                                 void * new;
 510                                 isc_uint32_t newlen = listcount + 16;
 511                                 size_t newsize, oldsize;
 512
 513                                 newsize = newlen * sizeof(*lists);
 514                                 oldsize = listcount * sizeof(*lists);
 515                                 new = isc_mem_get(mctx, newsize);
 516                                 if (new == NULL)
 517                                         goto cleanup;
 518                                 if (listcount != 0) {
 519                                         memcpy(new, lists, oldsize);
 520                                         isc_mem_put(mctx, lists, oldsize);
 521                                 }
 522                                 lists = new;
 523                                 listcount = newlen;
 524                         }
 525                         /* Seen? */
 526                         for (j = 0; j < l; j++)
 527                                 if (strcasecmp(lists[j].name, listname) == 0)
 528                                         break;
 529                         if (j < l)
 530                                 continue;
 531                         tresult = get_masters_def(config, listname, &list);
 532                         if (tresult == ISC_R_NOTFOUND) {
 533                                 cfg_obj_log(addr, ns_g_lctx, ISC_LOG_ERROR,
 534                                     "masters \"%s\" not found", listname);
 535
 536                                 result = tresult;
 537                                 goto cleanup;
 538                         }
 539                         if (tresult != ISC_R_SUCCESS)
 540                                 goto cleanup;
 541                         lists[l++].name = listname;
 542                         /* Grow stack? */
 543                         if (stackcount == pushed) {
 544                                 void * new;
 545                                 isc_uint32_t newlen = stackcount + 16;
 546                                 size_t newsize, oldsize;
 547
 548                                 newsize = newlen * sizeof(*stack);
 549                                 oldsize = stackcount * sizeof(*stack);
 550                                 new = isc_mem_get(mctx, newsize);
 551                                 if (new == NULL)
 552                                         goto cleanup;
 553                                 if (stackcount != 0) {
 554                                         memcpy(new, stack, oldsize);
 555                                         isc_mem_put(mctx, stack, oldsize);
 556                                 }
 557                                 stack = new;
 558                                 stackcount = newlen;
 559                         }
 560                         /*
 561                          * We want to resume processing this list on the
 562                          * next element.
 563                          */
 564                         stack[pushed].element = cfg_list_next(element);
 565                         stack[pushed].port = port;
 566                         pushed++;
 567                         goto newlist;
 568                 }
 569
 570                 if (i == addrcount) {
 571                         void * new;
 572                         isc_uint32_t newlen = addrcount + 16;
 573                         size_t newsize, oldsize;
 574
 575                         newsize = newlen * sizeof(isc_sockaddr_t);
 576                         oldsize = addrcount * sizeof(isc_sockaddr_t);
 577                         new = isc_mem_get(mctx, newsize);
 578                         if (new == NULL)
 579                                 goto cleanup;
 580                         if (addrcount != 0) {
 581                                 memcpy(new, addrs, oldsize);
 582                                 isc_mem_put(mctx, addrs, oldsize);
 583                         }
 584                         addrs = new;
 585                         addrcount = newlen;
 586
 587                         newsize = newlen * sizeof(dns_name_t *);
 588                         oldsize = keycount * sizeof(dns_name_t *);
 589                         new = isc_mem_get(mctx, newsize);
 590                         if (new == NULL)
 591                                 goto cleanup;
 592                         if (keycount != 0) {
 593                                 memcpy(new, keys, oldsize);
 594                                 isc_mem_put(mctx, keys, oldsize);
 595                         }
 596                         keys = new;
 597                         keycount = newlen;
 598                 }
 599
 600                 addrs[i] = *cfg_obj_assockaddr(addr);
 601                 if (isc_sockaddr_getport(&addrs[i]) == 0)
 602                         isc_sockaddr_setport(&addrs[i], port);
 603                 keys[i] = NULL;
 604                 if (!cfg_obj_isstring(key)) {
 605                         i++;
 606                         continue;
 607                 }
 608                 keys[i] = isc_mem_get(mctx, sizeof(dns_name_t));
 609                 if (keys[i] == NULL)
 610                         goto cleanup;
 611                 dns_name_init(keys[i], NULL);
 612
 613                 keystr = cfg_obj_asstring(key);
 614                 isc_buffer_init(&b, keystr, strlen(keystr));
 615                 isc_buffer_add(&b, strlen(keystr));
 616                 dns_fixedname_init(&fname);
 617                 result = dns_name_fromtext(dns_fixedname_name(&fname), &b,
 618                                            dns_rootname, ISC_FALSE, NULL);
 619                 if (result != ISC_R_SUCCESS)
 620                         goto cleanup;
 621                 result = dns_name_dup(dns_fixedname_name(&fname), mctx,
 622                                       keys[i]);
 623                 if (result != ISC_R_SUCCESS)
 624                         goto cleanup;
 625                 i++;
 626         }
 627         if (pushed != 0) {
 628                 pushed--;
 629                 element = stack[pushed].element;
 630                 port = stack[pushed].port;
 631                 goto resume;
 632         }
 633         if (i < addrcount) {
 634                 void * new;
 635                 size_t newsize, oldsize;
 636
 637                 newsize = i * sizeof(isc_sockaddr_t);
 638                 oldsize = addrcount * sizeof(isc_sockaddr_t);
 639                 if (i != 0) {
 640                         new = isc_mem_get(mctx, newsize);
 641                         if (new == NULL)
 642                                 goto cleanup;
 643                         memcpy(new, addrs, newsize);
 644                 } else
 645                         new = NULL;
 646                 isc_mem_put(mctx, addrs, oldsize);
 647                 addrs = new;
 648                 addrcount = i;
 649
 650                 newsize = i * sizeof(dns_name_t *);
 651                 oldsize = keycount * sizeof(dns_name_t *);
 652                 if (i != 0) {
 653                         new = isc_mem_get(mctx, newsize);
 654                         if (new == NULL)
 655                                 goto cleanup;
 656                         memcpy(new, keys,  newsize);
 657                 } else
 658                         new = NULL;
 659                 isc_mem_put(mctx, keys, oldsize);
 660                 keys = new;
 661                 keycount = i;
 662         }
 663
 664         if (lists != NULL)
 665                 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
 666         if (stack != NULL)
 667                 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
 668
 669         INSIST(keycount == addrcount);
 670
 671         *addrsp = addrs;
 672         *keysp = keys;
 673         *countp = addrcount;
 674
 675         return (ISC_R_SUCCESS);
 676
 677  cleanup:
 678         if (addrs != NULL)
 679                 isc_mem_put(mctx, addrs, addrcount * sizeof(isc_sockaddr_t));
 680         if (keys != NULL) {
 681                 for (j = 0; j <= i; j++) {
 682                         if (keys[j] == NULL)
 683                                 continue;
 684                         if (dns_name_dynamic(keys[j]))
 685                                 dns_name_free(keys[j], mctx);
 686                         isc_mem_put(mctx, keys[j], sizeof(dns_name_t));
 687                 }
 688                 isc_mem_put(mctx, keys, keycount * sizeof(dns_name_t *));
 689         }
 690         if (lists != NULL)
 691                 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
 692         if (stack != NULL)
 693                 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
 694         return (result);
 695 }
 696
 697 void
 698 ns_config_putipandkeylist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 699                           dns_name_t ***keysp, isc_uint32_t count)
 700 {
 701         unsigned int i;
 702         dns_name_t **keys = *keysp;
 703
 704         INSIST(addrsp != NULL && *addrsp != NULL);
 705
 706         isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
 707         for (i = 0; i < count; i++) {
 708                 if (keys[i] == NULL)
 709                         continue;
 710                 if (dns_name_dynamic(keys[i]))
 711                         dns_name_free(keys[i], mctx);
 712                 isc_mem_put(mctx, keys[i], sizeof(dns_name_t));
 713         }
 714         isc_mem_put(mctx, *keysp, count * sizeof(dns_name_t *));
 715         *addrsp = NULL;
 716         *keysp = NULL;
 717 }
 718
 719 isc_result_t
 720 ns_config_getport(const cfg_obj_t *config, in_port_t *portp) {
 721         const cfg_obj_t *maps[3];
 722         const cfg_obj_t *options = NULL;
 723         const cfg_obj_t *portobj = NULL;
 724         isc_result_t result;
 725         int i;
 726
 727         (void)cfg_map_get(config, "options", &options);
 728         i = 0;
 729         if (options != NULL)
 730                 maps[i++] = options;
 731         maps[i++] = ns_g_defaults;
 732         maps[i] = NULL;
 733
 734         result = ns_config_get(maps, "port", &portobj);
 735         INSIST(result == ISC_R_SUCCESS);
 736         if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
 737                 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 738                             "port '%u' out of range",
 739                             cfg_obj_asuint32(portobj));
 740                 return (ISC_R_RANGE);
 741         }
 742         *portp = (in_port_t)cfg_obj_asuint32(portobj);
 743         return (ISC_R_SUCCESS);
 744 }
 745
 746 struct keyalgorithms {
 747         const char *str;
 748         enum { hmacnone, hmacmd5, hmacsha1, hmacsha224,
 749                hmacsha256, hmacsha384, hmacsha512 } hmac;
 750         isc_uint16_t size;
 751 } algorithms[] = {
 752         { "hmac-md5", hmacmd5, 128 },
 753         { "hmac-md5.sig-alg.reg.int", hmacmd5, 0 },
 754         { "hmac-md5.sig-alg.reg.int.", hmacmd5, 0 },
 755         { "hmac-sha1", hmacsha1, 160 },
 756         { "hmac-sha224", hmacsha224, 224 },
 757         { "hmac-sha256", hmacsha256, 256 },
 758         { "hmac-sha384", hmacsha384, 384 },
 759         { "hmac-sha512", hmacsha512, 512 },
 760         {  NULL, hmacnone, 0 }
 761 };
 762
 763 isc_result_t
 764 ns_config_getkeyalgorithm(const char *str, dns_name_t **name,
 765                           isc_uint16_t *digestbits)
 766 {
 767         int i;
 768         size_t len = 0;
 769         isc_uint16_t bits;
 770         isc_result_t result;
 771
 772         for (i = 0; algorithms[i].str != NULL; i++) {
 773                 len = strlen(algorithms[i].str);
 774                 if (strncasecmp(algorithms[i].str, str, len) == 0 &&
 775                     (str[len] == '\0' ||
 776                      (algorithms[i].size != 0 && str[len] == '-')))
 777                         break;
 778         }
 779         if (algorithms[i].str == NULL)
 780                 return (ISC_R_NOTFOUND);
 781         if (str[len] == '-') {
 782                 result = isc_parse_uint16(&bits, str + len + 1, 10);
 783                 if (result != ISC_R_SUCCESS)
 784                         return (result);
 785                 if (bits > algorithms[i].size)
 786                         return (ISC_R_RANGE);
 787         } else if (algorithms[i].size == 0)
 788                 bits = 128;
 789         else
 790                 bits = algorithms[i].size;
 791
 792         if (name != NULL) {
 793                 switch (algorithms[i].hmac) {
 794                 case hmacmd5: *name = dns_tsig_hmacmd5_name; break;
 795                 case hmacsha1: *name = dns_tsig_hmacsha1_name; break;
 796                 case hmacsha224: *name = dns_tsig_hmacsha224_name; break;
 797                 case hmacsha256: *name = dns_tsig_hmacsha256_name; break;
 798                 case hmacsha384: *name = dns_tsig_hmacsha384_name; break;
 799                 case hmacsha512: *name = dns_tsig_hmacsha512_name; break;
 800                 default:
 801                         INSIST(0);
 802                 }
 803         }
 804         if (digestbits != NULL)
 805                 *digestbits = bits;
 806         return (ISC_R_SUCCESS);
 807 }