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 /* $Id: config.c,v 1.123 2012/01/06 23:46:41 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 <dst/dst.h>
  46
  47 #include <named/config.h>
  48 #include <named/globals.h>
  49
  50 #include "bind.keys.h"
  51
  52 /*% default configuration */
  53 static char defaultconf[] = "\
  54 options {\n\
  55 #       blackhole {none;};\n"
  56 #ifndef WIN32
  57 "       coresize default;\n\
  58         datasize default;\n\
  59         files unlimited;\n\
  60         stacksize default;\n"
  61 #endif
  62 "#      session-keyfile \"" NS_LOCALSTATEDIR "/run/named/session.key\";\n\
  63         session-keyname local-ddns;\n\
  64         session-keyalg hmac-sha256;\n\
  65         deallocate-on-exit true;\n\
  66 #       directory <none>\n\
  67         dump-file \"named_dump.db\";\n\
  68         fake-iquery no;\n\
  69         has-old-clients false;\n\
  70         heartbeat-interval 60;\n\
  71         host-statistics no;\n\
  72         interface-interval 60;\n\
  73         listen-on {any;};\n\
  74         listen-on-v6 {none;};\n\
  75         match-mapped-addresses no;\n\
  76         max-rsa-exponent-size 0; /* no limit */\n\
  77         memstatistics-file \"named.memstats\";\n\
  78         multiple-cnames no;\n\
  79 #       named-xfer <obsolete>;\n\
  80 #       pid-file \"" NS_LOCALSTATEDIR "/run/named/named.pid\"; /* or /lwresd.pid */\n\
  81         bindkeys-file \"" NS_SYSCONFDIR "/bind.keys\";\n\
  82         port 53;\n\
  83         recursing-file \"named.recursing\";\n\
  84         secroots-file \"named.secroots\";\n\
  85 "
  86 #ifdef PATH_RANDOMDEV
  87 "\
  88         random-device \"" PATH_RANDOMDEV "\";\n\
  89 "
  90 #endif
  91 "\
  92         recursive-clients 1000;\n\
  93         resolver-query-timeout 10;\n\
  94         rrset-order { order random; };\n\
  95         serial-queries 20;\n\
  96         serial-query-rate 20;\n\
  97         server-id none;\n\
  98         statistics-file \"named.stats\";\n\
  99         statistics-interval 60;\n\
 100         tcp-clients 100;\n\
 101         tcp-listen-queue 10;\n\
 102 #       tkey-dhkey <none>\n\
 103 #       tkey-gssapi-credential <none>\n\
 104 #       tkey-domain <none>\n\
 105         transfers-per-ns 2;\n\
 106         transfers-in 10;\n\
 107         transfers-out 10;\n\
 108         treat-cr-as-space true;\n\
 109         use-id-pool true;\n\
 110         use-ixfr true;\n\
 111         edns-udp-size 4096;\n\
 112         max-udp-size 4096;\n\
 113         request-nsid false;\n\
 114         reserved-sockets 512;\n\
 115 \n\
 116         /* DLV */\n\
 117         dnssec-lookaside . trust-anchor dlv.isc.org;\n\
 118 \n\
 119         /* view */\n\
 120         allow-notify {none;};\n\
 121         allow-update-forwarding {none;};\n\
 122         allow-query-cache { localnets; localhost; };\n\
 123         allow-query-cache-on { any; };\n\
 124         allow-recursion { localnets; localhost; };\n\
 125         allow-recursion-on { any; };\n\
 126 #       allow-v6-synthesis <obsolete>;\n\
 127 #       sortlist <none>\n\
 128 #       topology <none>\n\
 129         auth-nxdomain false;\n\
 130         minimal-responses false;\n\
 131         recursion true;\n\
 132         provide-ixfr true;\n\
 133         request-ixfr true;\n\
 134         fetch-glue no;\n\
 135         rfc2308-type1 no;\n\
 136         additional-from-auth true;\n\
 137         additional-from-cache true;\n\
 138         query-source address *;\n\
 139         query-source-v6 address *;\n\
 140         notify-source *;\n\
 141         notify-source-v6 *;\n\
 142         cleaning-interval 0;  /* now meaningless */\n\
 143         min-roots 2;\n\
 144         lame-ttl 600;\n\
 145         max-ncache-ttl 10800; /* 3 hours */\n\
 146         max-cache-ttl 604800; /* 1 week */\n\
 147         transfer-format many-answers;\n\
 148         max-cache-size 0;\n\
 149         check-names master fail;\n\
 150         check-names slave warn;\n\
 151         check-names response ignore;\n\
 152         check-dup-records warn;\n\
 153         check-mx warn;\n\
 154         check-spf warn;\n\
 155         acache-enable no;\n\
 156         acache-cleaning-interval 60;\n\
 157         max-acache-size 16M;\n\
 158         dnssec-enable yes;\n\
 159         dnssec-validation yes; \n\
 160         dnssec-accept-expired no;\n\
 161         clients-per-query 10;\n\
 162         max-clients-per-query 100;\n\
 163         zero-no-soa-ttl-cache no;\n\
 164         nsec3-test-zone no;\n\
 165         allow-new-zones no;\n\
 166 "
 167 #ifdef ALLOW_FILTER_AAAA_ON_V4
 168 "       filter-aaaa-on-v4 no;\n\
 169         filter-aaaa { any; };\n\
 170 "
 171 #endif
 172
 173 "       /* zone */\n\
 174         allow-query {any;};\n\
 175         allow-query-on {any;};\n\
 176         allow-transfer {any;};\n\
 177         notify yes;\n\
 178 #       also-notify <none>\n\
 179         notify-delay 5;\n\
 180         notify-to-soa no;\n\
 181         dialup no;\n\
 182 #       forward <none>\n\
 183 #       forwarders <none>\n\
 184         maintain-ixfr-base no;\n\
 185 #       max-ixfr-log-size <obsolete>\n\
 186         transfer-source *;\n\
 187         transfer-source-v6 *;\n\
 188         alt-transfer-source *;\n\
 189         alt-transfer-source-v6 *;\n\
 190         max-transfer-time-in 120;\n\
 191         max-transfer-time-out 120;\n\
 192         max-transfer-idle-in 60;\n\
 193         max-transfer-idle-out 60;\n\
 194         max-retry-time 1209600; /* 2 weeks */\n\
 195         min-retry-time 500;\n\
 196         max-refresh-time 2419200; /* 4 weeks */\n\
 197         min-refresh-time 300;\n\
 198         multi-master no;\n\
 199         dnssec-secure-to-insecure no;\n\
 200         sig-validity-interval 30; /* days */\n\
 201         sig-signing-nodes 100;\n\
 202         sig-signing-signatures 10;\n\
 203         sig-signing-type 65534;\n\
 204         inline-signing no;\n\
 205         zone-statistics terse;\n\
 206         max-journal-size unlimited;\n\
 207         ixfr-from-differences false;\n\
 208         check-wildcard yes;\n\
 209         check-sibling yes;\n\
 210         check-integrity yes;\n\
 211         check-mx-cname warn;\n\
 212         check-srv-cname warn;\n\
 213         zero-no-soa-ttl yes;\n\
 214         update-check-ksk yes;\n\
 215         serial-update-method increment;\n\
 216         dnssec-update-mode maintain;\n\
 217         dnssec-dnskey-kskonly no;\n\
 218         dnssec-loadkeys-interval 60;\n\
 219         try-tcp-refresh yes; /* BIND 8 compat */\n\
 220 };\n\
 221 "
 222
 223 "#\n\
 224 #  Zones in the \"_bind\" view are NOT counted in the count of zones.\n\
 225 #\n\
 226 view \"_bind\" chaos {\n\
 227         recursion no;\n\
 228         notify no;\n\
 229         allow-new-zones no;\n\
 230 "
 231 #ifdef USE_RRL
 232 "       # Prevent use of this zone in DNS amplified reflection DoS attacks\n\
 233         rate-limit {\n\
 234                 responses-per-second 3;\n\
 235                 slip 0;\n\
 236                 min-table-size 10;\n\
 237         };\n\
 238 "
 239 #endif /* USE_RRL */
 240 "       zone \"version.bind\" chaos {\n\
 241                 type master;\n\
 242                 database \"_builtin version\";\n\
 243         };\n\
 244 \n\
 245         zone \"hostname.bind\" chaos {\n\
 246                 type master;\n\
 247                 database \"_builtin hostname\";\n\
 248         };\n\
 249 \n\
 250         zone \"authors.bind\" chaos {\n\
 251                 type master;\n\
 252                 database \"_builtin authors\";\n\
 253         };\n\
 254 \n\
 255         zone \"id.server\" chaos {\n\
 256                 type master;\n\
 257                 database \"_builtin id\";\n\
 258         };\n\
 259 };\n\
 260 "
 261 "#\n\
 262 #  Default trusted key(s) for builtin DLV support\n\
 263 #  (used if \"dnssec-lookaside auto;\" is set and\n\
 264 #  sysconfdir/bind.keys doesn't exist).\n\
 265 #\n\
 266 # BEGIN MANAGED KEYS\n"
 267
 268 /* Imported from bind.keys.h: */
 269 MANAGED_KEYS
 270
 271 "# END MANAGED KEYS\n\
 272 ";
 273
 274 isc_result_t
 275 ns_config_parsedefaults(cfg_parser_t *parser, cfg_obj_t **conf) {
 276         isc_buffer_t b;
 277
 278         isc_buffer_init(&b, defaultconf, sizeof(defaultconf) - 1);
 279         isc_buffer_add(&b, sizeof(defaultconf) - 1);
 280         return (cfg_parse_buffer(parser, &b, &cfg_type_namedconf, conf));
 281 }
 282
 283 isc_result_t
 284 ns_config_get(const cfg_obj_t **maps, const char *name, const cfg_obj_t **obj) {
 285         int i;
 286
 287         for (i = 0;; i++) {
 288                 if (maps[i] == NULL)
 289                         return (ISC_R_NOTFOUND);
 290                 if (cfg_map_get(maps[i], name, obj) == ISC_R_SUCCESS)
 291                         return (ISC_R_SUCCESS);
 292         }
 293 }
 294
 295 isc_result_t
 296 ns_checknames_get(const cfg_obj_t **maps, const char *which,
 297                   const cfg_obj_t **obj)
 298 {
 299         const cfg_listelt_t *element;
 300         const cfg_obj_t *checknames;
 301         const cfg_obj_t *type;
 302         const cfg_obj_t *value;
 303         int i;
 304
 305         for (i = 0;; i++) {
 306                 if (maps[i] == NULL)
 307                         return (ISC_R_NOTFOUND);
 308                 checknames = NULL;
 309                 if (cfg_map_get(maps[i], "check-names",
 310                                 &checknames) == ISC_R_SUCCESS) {
 311                         /*
 312                          * Zone map entry is not a list.
 313                          */
 314                         if (checknames != NULL && !cfg_obj_islist(checknames)) {
 315                                 *obj = checknames;
 316                                 return (ISC_R_SUCCESS);
 317                         }
 318                         for (element = cfg_list_first(checknames);
 319                              element != NULL;
 320                              element = cfg_list_next(element)) {
 321                                 value = cfg_listelt_value(element);
 322                                 type = cfg_tuple_get(value, "type");
 323                                 if (strcasecmp(cfg_obj_asstring(type),
 324                                                which) == 0) {
 325                                         *obj = cfg_tuple_get(value, "mode");
 326                                         return (ISC_R_SUCCESS);
 327                                 }
 328                         }
 329
 330                 }
 331         }
 332 }
 333
 334 int
 335 ns_config_listcount(const cfg_obj_t *list) {
 336         const cfg_listelt_t *e;
 337         int i = 0;
 338
 339         for (e = cfg_list_first(list); e != NULL; e = cfg_list_next(e))
 340                 i++;
 341
 342         return (i);
 343 }
 344
 345 isc_result_t
 346 ns_config_getclass(const cfg_obj_t *classobj, dns_rdataclass_t defclass,
 347                    dns_rdataclass_t *classp) {
 348         isc_textregion_t r;
 349         isc_result_t result;
 350
 351         if (!cfg_obj_isstring(classobj)) {
 352                 *classp = defclass;
 353                 return (ISC_R_SUCCESS);
 354         }
 355         DE_CONST(cfg_obj_asstring(classobj), r.base);
 356         r.length = strlen(r.base);
 357         result = dns_rdataclass_fromtext(classp, &r);
 358         if (result != ISC_R_SUCCESS)
 359                 cfg_obj_log(classobj, ns_g_lctx, ISC_LOG_ERROR,
 360                             "unknown class '%s'", r.base);
 361         return (result);
 362 }
 363
 364 isc_result_t
 365 ns_config_gettype(const cfg_obj_t *typeobj, dns_rdatatype_t deftype,
 366                    dns_rdatatype_t *typep) {
 367         isc_textregion_t r;
 368         isc_result_t result;
 369
 370         if (!cfg_obj_isstring(typeobj)) {
 371                 *typep = deftype;
 372                 return (ISC_R_SUCCESS);
 373         }
 374         DE_CONST(cfg_obj_asstring(typeobj), r.base);
 375         r.length = strlen(r.base);
 376         result = dns_rdatatype_fromtext(typep, &r);
 377         if (result != ISC_R_SUCCESS)
 378                 cfg_obj_log(typeobj, ns_g_lctx, ISC_LOG_ERROR,
 379                             "unknown type '%s'", r.base);
 380         return (result);
 381 }
 382
 383 dns_zonetype_t
 384 ns_config_getzonetype(const cfg_obj_t *zonetypeobj) {
 385         dns_zonetype_t ztype = dns_zone_none;
 386         const char *str;
 387
 388         str = cfg_obj_asstring(zonetypeobj);
 389         if (strcasecmp(str, "master") == 0)
 390                 ztype = dns_zone_master;
 391         else if (strcasecmp(str, "slave") == 0)
 392                 ztype = dns_zone_slave;
 393         else if (strcasecmp(str, "stub") == 0)
 394                 ztype = dns_zone_stub;
 395         else if (strcasecmp(str, "static-stub") == 0)
 396                 ztype = dns_zone_staticstub;
 397         else if (strcasecmp(str, "redirect") == 0)
 398                 ztype = dns_zone_redirect;
 399         else
 400                 INSIST(0);
 401         return (ztype);
 402 }
 403
 404 isc_result_t
 405 ns_config_getiplist(const cfg_obj_t *config, const cfg_obj_t *list,
 406                     in_port_t defport, isc_mem_t *mctx,
 407                     isc_sockaddr_t **addrsp, isc_uint32_t *countp)
 408 {
 409         int count, i = 0;
 410         const cfg_obj_t *addrlist;
 411         const cfg_obj_t *portobj;
 412         const cfg_listelt_t *element;
 413         isc_sockaddr_t *addrs;
 414         in_port_t port;
 415         isc_result_t result;
 416
 417         INSIST(addrsp != NULL && *addrsp == NULL);
 418         INSIST(countp != NULL);
 419
 420         addrlist = cfg_tuple_get(list, "addresses");
 421         count = ns_config_listcount(addrlist);
 422
 423         portobj = cfg_tuple_get(list, "port");
 424         if (cfg_obj_isuint32(portobj)) {
 425                 isc_uint32_t val = cfg_obj_asuint32(portobj);
 426                 if (val > ISC_UINT16_MAX) {
 427                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 428                                     "port '%u' out of range", val);
 429                         return (ISC_R_RANGE);
 430                 }
 431                 port = (in_port_t) val;
 432         } else if (defport != 0)
 433                 port = defport;
 434         else {
 435                 result = ns_config_getport(config, &port);
 436                 if (result != ISC_R_SUCCESS)
 437                         return (result);
 438         }
 439
 440         addrs = isc_mem_get(mctx, count * sizeof(isc_sockaddr_t));
 441         if (addrs == NULL)
 442                 return (ISC_R_NOMEMORY);
 443
 444         for (element = cfg_list_first(addrlist);
 445              element != NULL;
 446              element = cfg_list_next(element), i++)
 447         {
 448                 INSIST(i < count);
 449                 addrs[i] = *cfg_obj_assockaddr(cfg_listelt_value(element));
 450                 if (isc_sockaddr_getport(&addrs[i]) == 0)
 451                         isc_sockaddr_setport(&addrs[i], port);
 452         }
 453         INSIST(i == count);
 454
 455         *addrsp = addrs;
 456         *countp = count;
 457
 458         return (ISC_R_SUCCESS);
 459 }
 460
 461 void
 462 ns_config_putiplist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 463                     isc_uint32_t count)
 464 {
 465         INSIST(addrsp != NULL && *addrsp != NULL);
 466
 467         isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
 468         *addrsp = NULL;
 469 }
 470
 471 static isc_result_t
 472 get_masters_def(const cfg_obj_t *cctx, const char *name,
 473                 const cfg_obj_t **ret)
 474 {
 475         isc_result_t result;
 476         const cfg_obj_t *masters = NULL;
 477         const cfg_listelt_t *elt;
 478
 479         result = cfg_map_get(cctx, "masters", &masters);
 480         if (result != ISC_R_SUCCESS)
 481                 return (result);
 482         for (elt = cfg_list_first(masters);
 483              elt != NULL;
 484              elt = cfg_list_next(elt)) {
 485                 const cfg_obj_t *list;
 486                 const char *listname;
 487
 488                 list = cfg_listelt_value(elt);
 489                 listname = cfg_obj_asstring(cfg_tuple_get(list, "name"));
 490
 491                 if (strcasecmp(listname, name) == 0) {
 492                         *ret = list;
 493                         return (ISC_R_SUCCESS);
 494                 }
 495         }
 496         return (ISC_R_NOTFOUND);
 497 }
 498
 499 isc_result_t
 500 ns_config_getipandkeylist(const cfg_obj_t *config, const cfg_obj_t *list,
 501                           isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 502                           dns_name_t ***keysp, isc_uint32_t *countp)
 503 {
 504         isc_uint32_t addrcount = 0, keycount = 0, i = 0;
 505         isc_uint32_t listcount = 0, l = 0, j;
 506         isc_uint32_t stackcount = 0, pushed = 0;
 507         isc_result_t result;
 508         const cfg_listelt_t *element;
 509         const cfg_obj_t *addrlist;
 510         const cfg_obj_t *portobj;
 511         in_port_t port;
 512         dns_fixedname_t fname;
 513         isc_sockaddr_t *addrs = NULL;
 514         dns_name_t **keys = NULL;
 515         struct { const char *name; } *lists = NULL;
 516         struct {
 517                 const cfg_listelt_t *element;
 518                 in_port_t port;
 519         } *stack = NULL;
 520
 521         REQUIRE(addrsp != NULL && *addrsp == NULL);
 522         REQUIRE(keysp != NULL && *keysp == NULL);
 523         REQUIRE(countp != NULL);
 524
 525  newlist:
 526         addrlist = cfg_tuple_get(list, "addresses");
 527         portobj = cfg_tuple_get(list, "port");
 528         if (cfg_obj_isuint32(portobj)) {
 529                 isc_uint32_t val = cfg_obj_asuint32(portobj);
 530                 if (val > ISC_UINT16_MAX) {
 531                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 532                                     "port '%u' out of range", val);
 533                         result = ISC_R_RANGE;
 534                         goto cleanup;
 535                 }
 536                 port = (in_port_t) val;
 537         } else {
 538                 result = ns_config_getport(config, &port);
 539                 if (result != ISC_R_SUCCESS)
 540                         goto cleanup;
 541         }
 542
 543         result = ISC_R_NOMEMORY;
 544
 545         element = cfg_list_first(addrlist);
 546  resume:
 547         for ( ;
 548              element != NULL;
 549              element = cfg_list_next(element))
 550         {
 551                 const cfg_obj_t *addr;
 552                 const cfg_obj_t *key;
 553                 const char *keystr;
 554                 isc_buffer_t b;
 555
 556                 addr = cfg_tuple_get(cfg_listelt_value(element),
 557                                      "masterselement");
 558                 key = cfg_tuple_get(cfg_listelt_value(element), "key");
 559
 560                 if (!cfg_obj_issockaddr(addr)) {
 561                         const char *listname = cfg_obj_asstring(addr);
 562                         isc_result_t tresult;
 563
 564                         /* Grow lists? */
 565                         if (listcount == l) {
 566                                 void * new;
 567                                 isc_uint32_t newlen = listcount + 16;
 568                                 size_t newsize, oldsize;
 569
 570                                 newsize = newlen * sizeof(*lists);
 571                                 oldsize = listcount * sizeof(*lists);
 572                                 new = isc_mem_get(mctx, newsize);
 573                                 if (new == NULL)
 574                                         goto cleanup;
 575                                 if (listcount != 0) {
 576                                         memmove(new, lists, oldsize);
 577                                         isc_mem_put(mctx, lists, oldsize);
 578                                 }
 579                                 lists = new;
 580                                 listcount = newlen;
 581                         }
 582                         /* Seen? */
 583                         for (j = 0; j < l; j++)
 584                                 if (strcasecmp(lists[j].name, listname) == 0)
 585                                         break;
 586                         if (j < l)
 587                                 continue;
 588                         tresult = get_masters_def(config, listname, &list);
 589                         if (tresult == ISC_R_NOTFOUND) {
 590                                 cfg_obj_log(addr, ns_g_lctx, ISC_LOG_ERROR,
 591                                     "masters \"%s\" not found", listname);
 592
 593                                 result = tresult;
 594                                 goto cleanup;
 595                         }
 596                         if (tresult != ISC_R_SUCCESS)
 597                                 goto cleanup;
 598                         lists[l++].name = listname;
 599                         /* Grow stack? */
 600                         if (stackcount == pushed) {
 601                                 void * new;
 602                                 isc_uint32_t newlen = stackcount + 16;
 603                                 size_t newsize, oldsize;
 604
 605                                 newsize = newlen * sizeof(*stack);
 606                                 oldsize = stackcount * sizeof(*stack);
 607                                 new = isc_mem_get(mctx, newsize);
 608                                 if (new == NULL)
 609                                         goto cleanup;
 610                                 if (stackcount != 0) {
 611                                         memmove(new, stack, oldsize);
 612                                         isc_mem_put(mctx, stack, oldsize);
 613                                 }
 614                                 stack = new;
 615                                 stackcount = newlen;
 616                         }
 617                         /*
 618                          * We want to resume processing this list on the
 619                          * next element.
 620                          */
 621                         stack[pushed].element = cfg_list_next(element);
 622                         stack[pushed].port = port;
 623                         pushed++;
 624                         goto newlist;
 625                 }
 626
 627                 if (i == addrcount) {
 628                         void * new;
 629                         isc_uint32_t newlen = addrcount + 16;
 630                         size_t newsize, oldsize;
 631
 632                         newsize = newlen * sizeof(isc_sockaddr_t);
 633                         oldsize = addrcount * sizeof(isc_sockaddr_t);
 634                         new = isc_mem_get(mctx, newsize);
 635                         if (new == NULL)
 636                                 goto cleanup;
 637                         if (addrcount != 0) {
 638                                 memmove(new, addrs, oldsize);
 639                                 isc_mem_put(mctx, addrs, oldsize);
 640                         }
 641                         addrs = new;
 642                         addrcount = newlen;
 643
 644                         newsize = newlen * sizeof(dns_name_t *);
 645                         oldsize = keycount * sizeof(dns_name_t *);
 646                         new = isc_mem_get(mctx, newsize);
 647                         if (new == NULL)
 648                                 goto cleanup;
 649                         if (keycount != 0) {
 650                                 memmove(new, keys, oldsize);
 651                                 isc_mem_put(mctx, keys, oldsize);
 652                         }
 653                         keys = new;
 654                         keycount = newlen;
 655                 }
 656
 657                 addrs[i] = *cfg_obj_assockaddr(addr);
 658                 if (isc_sockaddr_getport(&addrs[i]) == 0)
 659                         isc_sockaddr_setport(&addrs[i], port);
 660                 keys[i] = NULL;
 661                 i++;    /* Increment here so that cleanup on error works. */
 662                 if (!cfg_obj_isstring(key))
 663                         continue;
 664                 keys[i - 1] = isc_mem_get(mctx, sizeof(dns_name_t));
 665                 if (keys[i - 1] == NULL)
 666                         goto cleanup;
 667                 dns_name_init(keys[i - 1], NULL);
 668
 669                 keystr = cfg_obj_asstring(key);
 670                 isc_buffer_constinit(&b, keystr, strlen(keystr));
 671                 isc_buffer_add(&b, strlen(keystr));
 672                 dns_fixedname_init(&fname);
 673                 result = dns_name_fromtext(dns_fixedname_name(&fname), &b,
 674                                            dns_rootname, 0, NULL);
 675                 if (result != ISC_R_SUCCESS)
 676                         goto cleanup;
 677                 result = dns_name_dup(dns_fixedname_name(&fname), mctx,
 678                                       keys[i - 1]);
 679                 if (result != ISC_R_SUCCESS)
 680                         goto cleanup;
 681         }
 682         if (pushed != 0) {
 683                 pushed--;
 684                 element = stack[pushed].element;
 685                 port = stack[pushed].port;
 686                 goto resume;
 687         }
 688         if (i < addrcount) {
 689                 void * new;
 690                 size_t newsize, oldsize;
 691
 692                 newsize = i * sizeof(isc_sockaddr_t);
 693                 oldsize = addrcount * sizeof(isc_sockaddr_t);
 694                 if (i != 0) {
 695                         new = isc_mem_get(mctx, newsize);
 696                         if (new == NULL)
 697                                 goto cleanup;
 698                         memmove(new, addrs, newsize);
 699                 } else
 700                         new = NULL;
 701                 isc_mem_put(mctx, addrs, oldsize);
 702                 addrs = new;
 703                 addrcount = i;
 704
 705                 newsize = i * sizeof(dns_name_t *);
 706                 oldsize = keycount * sizeof(dns_name_t *);
 707                 if (i != 0) {
 708                         new = isc_mem_get(mctx, newsize);
 709                         if (new == NULL)
 710                                 goto cleanup;
 711                         memmove(new, keys,  newsize);
 712                 } else
 713                         new = NULL;
 714                 isc_mem_put(mctx, keys, oldsize);
 715                 keys = new;
 716                 keycount = i;
 717         }
 718
 719         if (lists != NULL)
 720                 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
 721         if (stack != NULL)
 722                 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
 723
 724         INSIST(keycount == addrcount);
 725
 726         *addrsp = addrs;
 727         *keysp = keys;
 728         *countp = addrcount;
 729
 730         return (ISC_R_SUCCESS);
 731
 732  cleanup:
 733         if (addrs != NULL)
 734                 isc_mem_put(mctx, addrs, addrcount * sizeof(isc_sockaddr_t));
 735         if (keys != NULL) {
 736                 for (j = 0; j < i; j++) {
 737                         if (keys[j] == NULL)
 738                                 continue;
 739                         if (dns_name_dynamic(keys[j]))
 740                                 dns_name_free(keys[j], mctx);
 741                         isc_mem_put(mctx, keys[j], sizeof(dns_name_t));
 742                 }
 743                 isc_mem_put(mctx, keys, keycount * sizeof(dns_name_t *));
 744         }
 745         if (lists != NULL)
 746                 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
 747         if (stack != NULL)
 748                 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
 749         return (result);
 750 }
 751
 752 void
 753 ns_config_putipandkeylist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 754                           dns_name_t ***keysp, isc_uint32_t count)
 755 {
 756         unsigned int i;
 757         dns_name_t **keys = *keysp;
 758
 759         INSIST(addrsp != NULL && *addrsp != NULL);
 760
 761         isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
 762         for (i = 0; i < count; i++) {
 763                 if (keys[i] == NULL)
 764                         continue;
 765                 if (dns_name_dynamic(keys[i]))
 766                         dns_name_free(keys[i], mctx);
 767                 isc_mem_put(mctx, keys[i], sizeof(dns_name_t));
 768         }
 769         isc_mem_put(mctx, *keysp, count * sizeof(dns_name_t *));
 770         *addrsp = NULL;
 771         *keysp = NULL;
 772 }
 773
 774 isc_result_t
 775 ns_config_getport(const cfg_obj_t *config, in_port_t *portp) {
 776         const cfg_obj_t *maps[3];
 777         const cfg_obj_t *options = NULL;
 778         const cfg_obj_t *portobj = NULL;
 779         isc_result_t result;
 780         int i;
 781
 782         (void)cfg_map_get(config, "options", &options);
 783         i = 0;
 784         if (options != NULL)
 785                 maps[i++] = options;
 786         maps[i++] = ns_g_defaults;
 787         maps[i] = NULL;
 788
 789         result = ns_config_get(maps, "port", &portobj);
 790         INSIST(result == ISC_R_SUCCESS);
 791         if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
 792                 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 793                             "port '%u' out of range",
 794                             cfg_obj_asuint32(portobj));
 795                 return (ISC_R_RANGE);
 796         }
 797         *portp = (in_port_t)cfg_obj_asuint32(portobj);
 798         return (ISC_R_SUCCESS);
 799 }
 800
 801 struct keyalgorithms {
 802         const char *str;
 803         enum { hmacnone, hmacmd5, hmacsha1, hmacsha224,
 804                hmacsha256, hmacsha384, hmacsha512 } hmac;
 805         unsigned int type;
 806         isc_uint16_t size;
 807 } algorithms[] = {
 808         { "hmac-md5", hmacmd5, DST_ALG_HMACMD5, 128 },
 809         { "hmac-md5.sig-alg.reg.int", hmacmd5, DST_ALG_HMACMD5, 0 },
 810         { "hmac-md5.sig-alg.reg.int.", hmacmd5, DST_ALG_HMACMD5, 0 },
 811         { "hmac-sha1", hmacsha1, DST_ALG_HMACSHA1, 160 },
 812         { "hmac-sha224", hmacsha224, DST_ALG_HMACSHA224, 224 },
 813         { "hmac-sha256", hmacsha256, DST_ALG_HMACSHA256, 256 },
 814         { "hmac-sha384", hmacsha384, DST_ALG_HMACSHA384, 384 },
 815         { "hmac-sha512", hmacsha512, DST_ALG_HMACSHA512, 512 },
 816         {  NULL, hmacnone, DST_ALG_UNKNOWN, 0 }
 817 };
 818
 819 isc_result_t
 820 ns_config_getkeyalgorithm(const char *str, dns_name_t **name,
 821                           isc_uint16_t *digestbits)
 822 {
 823         return (ns_config_getkeyalgorithm2(str, name, NULL, digestbits));
 824 }
 825
 826 isc_result_t
 827 ns_config_getkeyalgorithm2(const char *str, dns_name_t **name,
 828                            unsigned int *typep, isc_uint16_t *digestbits)
 829 {
 830         int i;
 831         size_t len = 0;
 832         isc_uint16_t bits;
 833         isc_result_t result;
 834
 835         for (i = 0; algorithms[i].str != NULL; i++) {
 836                 len = strlen(algorithms[i].str);
 837                 if (strncasecmp(algorithms[i].str, str, len) == 0 &&
 838                     (str[len] == '\0' ||
 839                      (algorithms[i].size != 0 && str[len] == '-')))
 840                         break;
 841         }
 842         if (algorithms[i].str == NULL)
 843                 return (ISC_R_NOTFOUND);
 844         if (str[len] == '-') {
 845                 result = isc_parse_uint16(&bits, str + len + 1, 10);
 846                 if (result != ISC_R_SUCCESS)
 847                         return (result);
 848                 if (bits > algorithms[i].size)
 849                         return (ISC_R_RANGE);
 850         } else if (algorithms[i].size == 0)
 851                 bits = 128;
 852         else
 853                 bits = algorithms[i].size;
 854
 855         if (name != NULL) {
 856                 switch (algorithms[i].hmac) {
 857                 case hmacmd5: *name = dns_tsig_hmacmd5_name; break;
 858                 case hmacsha1: *name = dns_tsig_hmacsha1_name; break;
 859                 case hmacsha224: *name = dns_tsig_hmacsha224_name; break;
 860                 case hmacsha256: *name = dns_tsig_hmacsha256_name; break;
 861                 case hmacsha384: *name = dns_tsig_hmacsha384_name; break;
 862                 case hmacsha512: *name = dns_tsig_hmacsha512_name; break;
 863                 default:
 864                         INSIST(0);
 865                 }
 866         }
 867         if (typep != NULL)
 868                 *typep = algorithms[i].type;
 869         if (digestbits != NULL)
 870                 *digestbits = bits;
 871         return (ISC_R_SUCCESS);
 872 }