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