external/bsd/bind/dist/bin/named/config.c

   1 /*      $NetBSD: config.c,v 1.11 2015/07/08 17:28:55 christos Exp $     */
   2
   3 /*
   4  * Copyright (C) 2004-2014  Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (C) 2001-2003  Internet Software Consortium.
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  12  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  13  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  14  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  15  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  16  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  17  * PERFORMANCE OF THIS SOFTWARE.
  18  */
  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         automatic-interface-scan yes;\n\
  56 #       blackhole {none;};\n"
  57 #ifndef WIN32
  58 "       coresize default;\n\
  59         datasize default;\n\
  60         files unlimited;\n\
  61         stacksize default;\n"
  62 #endif
  63 "#      session-keyfile \"" NS_LOCALSTATEDIR "/run/named/session.key\";\n\
  64         session-keyname local-ddns;\n\
  65         session-keyalg hmac-sha256;\n\
  66         deallocate-on-exit true;\n\
  67 #       directory <none>\n\
  68         dump-file \"named_dump.db\";\n\
  69         fake-iquery no;\n\
  70         has-old-clients false;\n\
  71         heartbeat-interval 60;\n\
  72         host-statistics no;\n\
  73         interface-interval 60;\n\
  74         listen-on {any;};\n\
  75         listen-on-v6 {any;};\n\
  76         match-mapped-addresses no;\n\
  77         max-rsa-exponent-size 0; /* no limit */\n\
  78         memstatistics-file \"named.memstats\";\n\
  79         multiple-cnames no;\n\
  80 #       named-xfer <obsolete>;\n\
  81 #       pid-file \"" NS_LOCALSTATEDIR "/run/named/named.pid\"; /* or /lwresd.pid */\n\
  82         bindkeys-file \"" NS_SYSCONFDIR "/bind.keys\";\n\
  83         port 53;\n\
  84         prefetch 2 9;\n\
  85         recursing-file \"named.recursing\";\n\
  86         secroots-file \"named.secroots\";\n\
  87 "
  88 #ifdef PATH_RANDOMDEV
  89 "\
  90         random-device \"" PATH_RANDOMDEV "\";\n\
  91 "
  92 #endif
  93 "\
  94         recursive-clients 1000;\n\
  95         resolver-query-timeout 10;\n\
  96         rrset-order { order random; };\n\
  97         serial-queries 20;\n\
  98         serial-query-rate 20;\n\
  99         server-id none;\n\
 100         statistics-file \"named.stats\";\n\
 101         statistics-interval 60;\n\
 102         tcp-clients 100;\n\
 103         tcp-listen-queue 10;\n\
 104 #       tkey-dhkey <none>\n\
 105 #       tkey-gssapi-credential <none>\n\
 106 #       tkey-domain <none>\n\
 107         transfers-per-ns 2;\n\
 108         transfers-in 10;\n\
 109         transfers-out 10;\n\
 110         treat-cr-as-space true;\n\
 111         use-id-pool true;\n\
 112         use-ixfr true;\n\
 113         edns-udp-size 4096;\n\
 114         max-udp-size 4096;\n\
 115 "
 116 #ifdef ISC_PLATFORM_USESIT
 117 "\
 118         nosit-udp-size 4096;\n\
 119         request-sit true;\n\
 120 "
 121 #endif
 122 "\
 123         request-nsid false;\n\
 124         reserved-sockets 512;\n\
 125 \n\
 126         /* DLV */\n\
 127         dnssec-lookaside . trust-anchor dlv.isc.org;\n\
 128 \n\
 129         /* view */\n\
 130         allow-notify {none;};\n\
 131         allow-update-forwarding {none;};\n\
 132         allow-query-cache { localnets; localhost; };\n\
 133         allow-query-cache-on { any; };\n\
 134         allow-recursion { localnets; localhost; };\n\
 135         allow-recursion-on { any; };\n\
 136 #       allow-v6-synthesis <obsolete>;\n\
 137 #       sortlist <none>\n\
 138 #       topology <none>\n\
 139         auth-nxdomain false;\n\
 140         minimal-responses false;\n\
 141         recursion true;\n\
 142         provide-ixfr true;\n\
 143         request-ixfr true;\n\
 144         fetch-glue no;\n\
 145         rfc2308-type1 no;\n\
 146         additional-from-auth true;\n\
 147         additional-from-cache true;\n\
 148         query-source address *;\n\
 149         query-source-v6 address *;\n\
 150         notify-source *;\n\
 151         notify-source-v6 *;\n\
 152         cleaning-interval 0;  /* now meaningless */\n\
 153         min-roots 2;\n\
 154         lame-ttl 600;\n\
 155         max-ncache-ttl 10800; /* 3 hours */\n\
 156         max-cache-ttl 604800; /* 1 week */\n\
 157         transfer-format many-answers;\n\
 158         max-cache-size 0;\n\
 159         check-names master fail;\n\
 160         check-names slave warn;\n\
 161         check-names response ignore;\n\
 162         check-dup-records warn;\n\
 163         check-mx warn;\n\
 164         check-spf warn;\n\
 165         acache-enable no;\n\
 166         acache-cleaning-interval 60;\n\
 167         max-acache-size 16M;\n\
 168         dnssec-enable yes;\n\
 169         dnssec-validation yes; \n\
 170         dnssec-accept-expired no;\n\
 171         clients-per-query 10;\n\
 172         max-clients-per-query 100;\n\
 173         max-recursion-depth 7;\n\
 174         max-recursion-queries 75;\n\
 175         zero-no-soa-ttl-cache no;\n\
 176         nsec3-test-zone no;\n\
 177         allow-new-zones no;\n\
 178 "
 179 #ifdef ALLOW_FILTER_AAAA
 180 "       filter-aaaa-on-v4 no;\n\
 181         filter-aaaa-on-v6 no;\n\
 182         filter-aaaa { any; };\n\
 183 "
 184 #endif
 185
 186 "       /* zone */\n\
 187         allow-query {any;};\n\
 188         allow-query-on {any;};\n\
 189         allow-transfer {any;};\n\
 190         notify yes;\n\
 191 #       also-notify <none>\n\
 192         notify-delay 5;\n\
 193         notify-to-soa no;\n\
 194         dialup no;\n\
 195 #       forward <none>\n\
 196 #       forwarders <none>\n\
 197         maintain-ixfr-base no;\n\
 198 #       max-ixfr-log-size <obsolete>\n\
 199         transfer-source *;\n\
 200         transfer-source-v6 *;\n\
 201         alt-transfer-source *;\n\
 202         alt-transfer-source-v6 *;\n\
 203         max-transfer-time-in 120;\n\
 204         max-transfer-time-out 120;\n\
 205         max-transfer-idle-in 60;\n\
 206         max-transfer-idle-out 60;\n\
 207         max-retry-time 1209600; /* 2 weeks */\n\
 208         min-retry-time 500;\n\
 209         max-refresh-time 2419200; /* 4 weeks */\n\
 210         min-refresh-time 300;\n\
 211         multi-master no;\n\
 212         dnssec-secure-to-insecure no;\n\
 213         sig-validity-interval 30; /* days */\n\
 214         sig-signing-nodes 100;\n\
 215         sig-signing-signatures 10;\n\
 216         sig-signing-type 65534;\n\
 217         inline-signing no;\n\
 218         zone-statistics terse;\n\
 219         max-journal-size unlimited;\n\
 220         ixfr-from-differences false;\n\
 221         check-wildcard yes;\n\
 222         check-sibling yes;\n\
 223         check-integrity yes;\n\
 224         check-mx-cname warn;\n\
 225         check-srv-cname warn;\n\
 226         zero-no-soa-ttl yes;\n\
 227         update-check-ksk yes;\n\
 228         serial-update-method increment;\n\
 229         dnssec-update-mode maintain;\n\
 230         dnssec-dnskey-kskonly no;\n\
 231         dnssec-loadkeys-interval 60;\n\
 232         try-tcp-refresh yes; /* BIND 8 compat */\n\
 233 };\n\
 234 "
 235
 236 "#\n\
 237 #  Zones in the \"_bind\" view are NOT counted in the count of zones.\n\
 238 #\n\
 239 view \"_bind\" chaos {\n\
 240         recursion no;\n\
 241         notify no;\n\
 242         allow-new-zones no;\n\
 243 \n\
 244         # Prevent use of this zone in DNS amplified reflection DoS attacks\n\
 245         rate-limit {\n\
 246                 responses-per-second 3;\n\
 247                 slip 0;\n\
 248                 min-table-size 10;\n\
 249         };\n\
 250 \n\
 251         zone \"version.bind\" chaos {\n\
 252                 type master;\n\
 253                 database \"_builtin version\";\n\
 254         };\n\
 255 \n\
 256         zone \"hostname.bind\" chaos {\n\
 257                 type master;\n\
 258                 database \"_builtin hostname\";\n\
 259         };\n\
 260 \n\
 261         zone \"authors.bind\" chaos {\n\
 262                 type master;\n\
 263                 database \"_builtin authors\";\n\
 264         };\n\
 265 \n\
 266         zone \"id.server\" chaos {\n\
 267                 type master;\n\
 268                 database \"_builtin id\";\n\
 269         };\n\
 270 };\n\
 271 "
 272 "#\n\
 273 #  Default trusted key(s) for builtin DLV support\n\
 274 #  (used if \"dnssec-lookaside auto;\" is set and\n\
 275 #  sysconfdir/bind.keys doesn't exist).\n\
 276 #\n\
 277 # BEGIN MANAGED KEYS\n"
 278
 279 /* Imported from bind.keys.h: */
 280 MANAGED_KEYS
 281
 282 "# END MANAGED KEYS\n\
 283 ";
 284
 285 isc_result_t
 286 ns_config_parsedefaults(cfg_parser_t *parser, cfg_obj_t **conf) {
 287         isc_buffer_t b;
 288
 289         isc_buffer_init(&b, defaultconf, sizeof(defaultconf) - 1);
 290         isc_buffer_add(&b, sizeof(defaultconf) - 1);
 291         return (cfg_parse_buffer(parser, &b, &cfg_type_namedconf, conf));
 292 }
 293
 294 isc_result_t
 295 ns_config_get(cfg_obj_t const * const *maps, const char *name,
 296               const cfg_obj_t **obj)
 297 {
 298         int i;
 299
 300         for (i = 0;; i++) {
 301                 if (maps[i] == NULL)
 302                         return (ISC_R_NOTFOUND);
 303                 if (cfg_map_get(maps[i], name, obj) == ISC_R_SUCCESS)
 304                         return (ISC_R_SUCCESS);
 305         }
 306 }
 307
 308 isc_result_t
 309 ns_checknames_get(const cfg_obj_t **maps, const char *which,
 310                   const cfg_obj_t **obj)
 311 {
 312         const cfg_listelt_t *element;
 313         const cfg_obj_t *checknames;
 314         const cfg_obj_t *type;
 315         const cfg_obj_t *value;
 316         int i;
 317
 318         for (i = 0;; i++) {
 319                 if (maps[i] == NULL)
 320                         return (ISC_R_NOTFOUND);
 321                 checknames = NULL;
 322                 if (cfg_map_get(maps[i], "check-names",
 323                                 &checknames) == ISC_R_SUCCESS) {
 324                         /*
 325                          * Zone map entry is not a list.
 326                          */
 327                         if (checknames != NULL && !cfg_obj_islist(checknames)) {
 328                                 *obj = checknames;
 329                                 return (ISC_R_SUCCESS);
 330                         }
 331                         for (element = cfg_list_first(checknames);
 332                              element != NULL;
 333                              element = cfg_list_next(element)) {
 334                                 value = cfg_listelt_value(element);
 335                                 type = cfg_tuple_get(value, "type");
 336                                 if (strcasecmp(cfg_obj_asstring(type),
 337                                                which) == 0) {
 338                                         *obj = cfg_tuple_get(value, "mode");
 339                                         return (ISC_R_SUCCESS);
 340                                 }
 341                         }
 342
 343                 }
 344         }
 345 }
 346
 347 int
 348 ns_config_listcount(const cfg_obj_t *list) {
 349         const cfg_listelt_t *e;
 350         int i = 0;
 351
 352         for (e = cfg_list_first(list); e != NULL; e = cfg_list_next(e))
 353                 i++;
 354
 355         return (i);
 356 }
 357
 358 isc_result_t
 359 ns_config_getclass(const cfg_obj_t *classobj, dns_rdataclass_t defclass,
 360                    dns_rdataclass_t *classp) {
 361         isc_textregion_t r;
 362         isc_result_t result;
 363
 364         if (!cfg_obj_isstring(classobj)) {
 365                 *classp = defclass;
 366                 return (ISC_R_SUCCESS);
 367         }
 368         DE_CONST(cfg_obj_asstring(classobj), r.base);
 369         r.length = strlen(r.base);
 370         result = dns_rdataclass_fromtext(classp, &r);
 371         if (result != ISC_R_SUCCESS)
 372                 cfg_obj_log(classobj, ns_g_lctx, ISC_LOG_ERROR,
 373                             "unknown class '%s'", r.base);
 374         return (result);
 375 }
 376
 377 isc_result_t
 378 ns_config_gettype(const cfg_obj_t *typeobj, dns_rdatatype_t deftype,
 379                    dns_rdatatype_t *typep) {
 380         isc_textregion_t r;
 381         isc_result_t result;
 382
 383         if (!cfg_obj_isstring(typeobj)) {
 384                 *typep = deftype;
 385                 return (ISC_R_SUCCESS);
 386         }
 387         DE_CONST(cfg_obj_asstring(typeobj), r.base);
 388         r.length = strlen(r.base);
 389         result = dns_rdatatype_fromtext(typep, &r);
 390         if (result != ISC_R_SUCCESS)
 391                 cfg_obj_log(typeobj, ns_g_lctx, ISC_LOG_ERROR,
 392                             "unknown type '%s'", r.base);
 393         return (result);
 394 }
 395
 396 dns_zonetype_t
 397 ns_config_getzonetype(const cfg_obj_t *zonetypeobj) {
 398         dns_zonetype_t ztype = dns_zone_none;
 399         const char *str;
 400
 401         str = cfg_obj_asstring(zonetypeobj);
 402         if (strcasecmp(str, "master") == 0)
 403                 ztype = dns_zone_master;
 404         else if (strcasecmp(str, "slave") == 0)
 405                 ztype = dns_zone_slave;
 406         else if (strcasecmp(str, "stub") == 0)
 407                 ztype = dns_zone_stub;
 408         else if (strcasecmp(str, "static-stub") == 0)
 409                 ztype = dns_zone_staticstub;
 410         else if (strcasecmp(str, "redirect") == 0)
 411                 ztype = dns_zone_redirect;
 412         else
 413                 INSIST(0);
 414         return (ztype);
 415 }
 416
 417 isc_result_t
 418 ns_config_getiplist(const cfg_obj_t *config, const cfg_obj_t *list,
 419                     in_port_t defport, isc_mem_t *mctx,
 420                     isc_sockaddr_t **addrsp, isc_dscp_t **dscpsp,
 421                     isc_uint32_t *countp)
 422 {
 423         int count, i = 0;
 424         const cfg_obj_t *addrlist;
 425         const cfg_obj_t *portobj, *dscpobj;
 426         const cfg_listelt_t *element;
 427         isc_sockaddr_t *addrs;
 428         in_port_t port;
 429         isc_dscp_t dscp = -1, *dscps = NULL;
 430         isc_result_t result;
 431
 432         INSIST(addrsp != NULL && *addrsp == NULL);
 433         INSIST(dscpsp == NULL || *dscpsp == NULL);
 434         INSIST(countp != NULL);
 435
 436         addrlist = cfg_tuple_get(list, "addresses");
 437         count = ns_config_listcount(addrlist);
 438
 439         portobj = cfg_tuple_get(list, "port");
 440         if (cfg_obj_isuint32(portobj)) {
 441                 isc_uint32_t val = cfg_obj_asuint32(portobj);
 442                 if (val > ISC_UINT16_MAX) {
 443                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 444                                     "port '%u' out of range", val);
 445                         return (ISC_R_RANGE);
 446                 }
 447                 port = (in_port_t) val;
 448         } else if (defport != 0)
 449                 port = defport;
 450         else {
 451                 result = ns_config_getport(config, &port);
 452                 if (result != ISC_R_SUCCESS)
 453                         return (result);
 454         }
 455
 456         if (dscpsp != NULL) {
 457                 dscps = isc_mem_get(mctx, count * sizeof(isc_dscp_t));
 458                 if (dscps == NULL)
 459                         return (ISC_R_NOMEMORY);
 460
 461                 dscpobj = cfg_tuple_get(list, "dscp");
 462                 if (dscpobj != NULL && cfg_obj_isuint32(dscpobj)) {
 463                         if (cfg_obj_asuint32(dscpobj) > 63) {
 464                                 cfg_obj_log(dscpobj, ns_g_lctx, ISC_LOG_ERROR,
 465                                             "dscp value '%u' is out of range",
 466                                             cfg_obj_asuint32(dscpobj));
 467                                 return (ISC_R_RANGE);
 468                         }
 469                         dscp = (isc_dscp_t)cfg_obj_asuint32(dscpobj);
 470                 }
 471         }
 472
 473         addrs = isc_mem_get(mctx, count * sizeof(isc_sockaddr_t));
 474         if (addrs == NULL)
 475                 return (ISC_R_NOMEMORY);
 476
 477         for (element = cfg_list_first(addrlist);
 478              element != NULL;
 479              element = cfg_list_next(element), i++)
 480         {
 481                 const cfg_obj_t *addr;
 482                 INSIST(i < count);
 483                 addr = cfg_listelt_value(element);
 484                 addrs[i] = *cfg_obj_assockaddr(addr);
 485                 if (dscpsp != NULL) {
 486                         isc_dscp_t innerdscp;
 487                         innerdscp = cfg_obj_getdscp(addr);
 488                         if (innerdscp == -1)
 489                                 innerdscp = dscp;
 490                         dscps[i] = innerdscp;
 491                 }
 492                 if (isc_sockaddr_getport(&addrs[i]) == 0)
 493                         isc_sockaddr_setport(&addrs[i], port);
 494         }
 495         INSIST(i == count);
 496
 497         *addrsp = addrs;
 498         *countp = count;
 499
 500         if (dscpsp != NULL)
 501                 *dscpsp = dscps;
 502
 503         return (ISC_R_SUCCESS);
 504 }
 505
 506 void
 507 ns_config_putiplist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 508                     isc_dscp_t **dscpsp, isc_uint32_t count)
 509 {
 510         INSIST(addrsp != NULL && *addrsp != NULL);
 511         INSIST(dscpsp == NULL || *dscpsp != NULL);
 512
 513         isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
 514         *addrsp = NULL;
 515
 516         if (dscpsp != NULL) {
 517                 isc_mem_put(mctx, *dscpsp, count * sizeof(isc_dscp_t));
 518                 *dscpsp = NULL;
 519         }
 520 }
 521
 522 static isc_result_t
 523 get_masters_def(const cfg_obj_t *cctx, const char *name,
 524                 const cfg_obj_t **ret)
 525 {
 526         isc_result_t result;
 527         const cfg_obj_t *masters = NULL;
 528         const cfg_listelt_t *elt;
 529
 530         result = cfg_map_get(cctx, "masters", &masters);
 531         if (result != ISC_R_SUCCESS)
 532                 return (result);
 533         for (elt = cfg_list_first(masters);
 534              elt != NULL;
 535              elt = cfg_list_next(elt)) {
 536                 const cfg_obj_t *list;
 537                 const char *listname;
 538
 539                 list = cfg_listelt_value(elt);
 540                 listname = cfg_obj_asstring(cfg_tuple_get(list, "name"));
 541
 542                 if (strcasecmp(listname, name) == 0) {
 543                         *ret = list;
 544                         return (ISC_R_SUCCESS);
 545                 }
 546         }
 547         return (ISC_R_NOTFOUND);
 548 }
 549
 550 isc_result_t
 551 ns_config_getipandkeylist(const cfg_obj_t *config, const cfg_obj_t *list,
 552                           isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 553                           isc_dscp_t **dscpsp, dns_name_t ***keysp,
 554                           isc_uint32_t *countp)
 555 {
 556         isc_uint32_t addrcount = 0, dscpcount = 0, keycount = 0, i = 0;
 557         isc_uint32_t listcount = 0, l = 0, j;
 558         isc_uint32_t stackcount = 0, pushed = 0;
 559         isc_result_t result;
 560         const cfg_listelt_t *element;
 561         const cfg_obj_t *addrlist;
 562         const cfg_obj_t *portobj;
 563         const cfg_obj_t *dscpobj;
 564         in_port_t port;
 565         isc_dscp_t dscp;
 566         dns_fixedname_t fname;
 567         isc_sockaddr_t *addrs = NULL;
 568         isc_dscp_t *dscps = NULL;
 569         dns_name_t **keys = NULL;
 570         struct { const char *name; } *lists = NULL;
 571         struct {
 572                 const cfg_listelt_t *element;
 573                 in_port_t port;
 574                 isc_dscp_t dscp;
 575         } *stack = NULL;
 576
 577         REQUIRE(addrsp != NULL && *addrsp == NULL);
 578         REQUIRE(dscpsp != NULL && *dscpsp == NULL);
 579         REQUIRE(keysp != NULL && *keysp == NULL);
 580         REQUIRE(countp != NULL);
 581
 582         /*
 583          * Get system defaults.
 584          */
 585         result = ns_config_getport(config, &port);
 586         if (result != ISC_R_SUCCESS)
 587                 goto cleanup;
 588
 589         result = ns_config_getdscp(config, &dscp);
 590         if (result != ISC_R_SUCCESS)
 591                 goto cleanup;
 592
 593  newlist:
 594         addrlist = cfg_tuple_get(list, "addresses");
 595         portobj = cfg_tuple_get(list, "port");
 596         dscpobj = cfg_tuple_get(list, "dscp");
 597
 598         if (cfg_obj_isuint32(portobj)) {
 599                 isc_uint32_t val = cfg_obj_asuint32(portobj);
 600                 if (val > ISC_UINT16_MAX) {
 601                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 602                                     "port '%u' out of range", val);
 603                         result = ISC_R_RANGE;
 604                         goto cleanup;
 605                 }
 606                 port = (in_port_t) val;
 607         }
 608
 609         if (dscpobj != NULL && cfg_obj_isuint32(dscpobj)) {
 610                 if (cfg_obj_asuint32(dscpobj) > 63) {
 611                         cfg_obj_log(dscpobj, ns_g_lctx, ISC_LOG_ERROR,
 612                                     "dscp value '%u' is out of range",
 613                                     cfg_obj_asuint32(dscpobj));
 614                         return (ISC_R_RANGE);
 615                 }
 616                 dscp = (isc_dscp_t)cfg_obj_asuint32(dscpobj);
 617         }
 618
 619         result = ISC_R_NOMEMORY;
 620
 621         element = cfg_list_first(addrlist);
 622  resume:
 623         for ( ;
 624              element != NULL;
 625              element = cfg_list_next(element))
 626         {
 627                 const cfg_obj_t *addr;
 628                 const cfg_obj_t *key;
 629                 const char *keystr;
 630                 isc_buffer_t b;
 631
 632                 addr = cfg_tuple_get(cfg_listelt_value(element),
 633                                      "masterselement");
 634                 key = cfg_tuple_get(cfg_listelt_value(element), "key");
 635
 636                 if (!cfg_obj_issockaddr(addr)) {
 637                         const char *listname = cfg_obj_asstring(addr);
 638                         isc_result_t tresult;
 639
 640                         /* Grow lists? */
 641                         if (listcount == l) {
 642                                 void * new;
 643                                 isc_uint32_t newlen = listcount + 16;
 644                                 size_t newsize, oldsize;
 645
 646                                 newsize = newlen * sizeof(*lists);
 647                                 oldsize = listcount * sizeof(*lists);
 648                                 new = isc_mem_get(mctx, newsize);
 649                                 if (new == NULL)
 650                                         goto cleanup;
 651                                 if (listcount != 0) {
 652                                         memmove(new, lists, oldsize);
 653                                         isc_mem_put(mctx, lists, oldsize);
 654                                 }
 655                                 lists = new;
 656                                 listcount = newlen;
 657                         }
 658                         /* Seen? */
 659                         for (j = 0; j < l; j++)
 660                                 if (strcasecmp(lists[j].name, listname) == 0)
 661                                         break;
 662                         if (j < l)
 663                                 continue;
 664                         tresult = get_masters_def(config, listname, &list);
 665                         if (tresult == ISC_R_NOTFOUND) {
 666                                 cfg_obj_log(addr, ns_g_lctx, ISC_LOG_ERROR,
 667                                     "masters \"%s\" not found", listname);
 668
 669                                 result = tresult;
 670                                 goto cleanup;
 671                         }
 672                         if (tresult != ISC_R_SUCCESS)
 673                                 goto cleanup;
 674                         lists[l++].name = listname;
 675                         /* Grow stack? */
 676                         if (stackcount == pushed) {
 677                                 void * new;
 678                                 isc_uint32_t newlen = stackcount + 16;
 679                                 size_t newsize, oldsize;
 680
 681                                 newsize = newlen * sizeof(*stack);
 682                                 oldsize = stackcount * sizeof(*stack);
 683                                 new = isc_mem_get(mctx, newsize);
 684                                 if (new == NULL)
 685                                         goto cleanup;
 686                                 if (stackcount != 0) {
 687                                         memmove(new, stack, oldsize);
 688                                         isc_mem_put(mctx, stack, oldsize);
 689                                 }
 690                                 stack = new;
 691                                 stackcount = newlen;
 692                         }
 693                         /*
 694                          * We want to resume processing this list on the
 695                          * next element.
 696                          */
 697                         stack[pushed].element = cfg_list_next(element);
 698                         stack[pushed].port = port;
 699                         stack[pushed].dscp = dscp;
 700                         pushed++;
 701                         goto newlist;
 702                 }
 703
 704                 if (i == addrcount) {
 705                         void * new;
 706                         isc_uint32_t newlen = addrcount + 16;
 707                         size_t newsize, oldsize;
 708
 709                         newsize = newlen * sizeof(isc_sockaddr_t);
 710                         oldsize = addrcount * sizeof(isc_sockaddr_t);
 711                         new = isc_mem_get(mctx, newsize);
 712                         if (new == NULL)
 713                                 goto cleanup;
 714                         if (addrcount != 0) {
 715                                 memmove(new, addrs, oldsize);
 716                                 isc_mem_put(mctx, addrs, oldsize);
 717                         }
 718                         addrs = new;
 719                         addrcount = newlen;
 720
 721                         newsize = newlen * sizeof(isc_dscp_t);
 722                         oldsize = dscpcount * sizeof(isc_dscp_t);
 723                         new = isc_mem_get(mctx, newsize);
 724                         if (new == NULL)
 725                                 goto cleanup;
 726                         if (dscpcount != 0) {
 727                                 memmove(new, dscps, oldsize);
 728                                 isc_mem_put(mctx, dscps, oldsize);
 729                         }
 730                         dscps = new;
 731                         dscpcount = newlen;
 732
 733                         newsize = newlen * sizeof(dns_name_t *);
 734                         oldsize = keycount * sizeof(dns_name_t *);
 735                         new = isc_mem_get(mctx, newsize);
 736                         if (new == NULL)
 737                                 goto cleanup;
 738                         if (keycount != 0) {
 739                                 memmove(new, keys, oldsize);
 740                                 isc_mem_put(mctx, keys, oldsize);
 741                         }
 742                         keys = new;
 743                         keycount = newlen;
 744                 }
 745
 746                 addrs[i] = *cfg_obj_assockaddr(addr);
 747                 if (isc_sockaddr_getport(&addrs[i]) == 0)
 748                         isc_sockaddr_setport(&addrs[i], port);
 749                 dscps[i] = cfg_obj_getdscp(addr);
 750                 if (dscps[i] == -1)
 751                         dscps[i] = dscp;
 752                 keys[i] = NULL;
 753                 i++;    /* Increment here so that cleanup on error works. */
 754                 if (!cfg_obj_isstring(key))
 755                         continue;
 756                 keys[i - 1] = isc_mem_get(mctx, sizeof(dns_name_t));
 757                 if (keys[i - 1] == NULL)
 758                         goto cleanup;
 759                 dns_name_init(keys[i - 1], NULL);
 760
 761                 keystr = cfg_obj_asstring(key);
 762                 isc_buffer_constinit(&b, keystr, strlen(keystr));
 763                 isc_buffer_add(&b, strlen(keystr));
 764                 dns_fixedname_init(&fname);
 765                 result = dns_name_fromtext(dns_fixedname_name(&fname), &b,
 766                                            dns_rootname, 0, NULL);
 767                 if (result != ISC_R_SUCCESS)
 768                         goto cleanup;
 769                 result = dns_name_dup(dns_fixedname_name(&fname), mctx,
 770                                       keys[i - 1]);
 771                 if (result != ISC_R_SUCCESS)
 772                         goto cleanup;
 773         }
 774         if (pushed != 0) {
 775                 pushed--;
 776                 element = stack[pushed].element;
 777                 port = stack[pushed].port;
 778                 dscp = stack[pushed].dscp;
 779                 goto resume;
 780         }
 781         if (i < addrcount) {
 782                 void * new;
 783                 size_t newsize, oldsize;
 784
 785                 newsize = i * sizeof(isc_sockaddr_t);
 786                 oldsize = addrcount * sizeof(isc_sockaddr_t);
 787                 if (i != 0) {
 788                         new = isc_mem_get(mctx, newsize);
 789                         if (new == NULL)
 790                                 goto cleanup;
 791                         memmove(new, addrs, newsize);
 792                 } else
 793                         new = NULL;
 794                 isc_mem_put(mctx, addrs, oldsize);
 795                 addrs = new;
 796                 addrcount = i;
 797
 798                 newsize = i * sizeof(isc_dscp_t);
 799                 oldsize = dscpcount * sizeof(isc_dscp_t);
 800                 if (i != 0) {
 801                         new = isc_mem_get(mctx, newsize);
 802                         if (new == NULL)
 803                                 goto cleanup;
 804                         memmove(new, dscps, newsize);
 805                 } else
 806                         new = NULL;
 807                 isc_mem_put(mctx, dscps, oldsize);
 808                 dscps = new;
 809                 dscpcount = i;
 810
 811                 newsize = i * sizeof(dns_name_t *);
 812                 oldsize = keycount * sizeof(dns_name_t *);
 813                 if (i != 0) {
 814                         new = isc_mem_get(mctx, newsize);
 815                         if (new == NULL)
 816                                 goto cleanup;
 817                         memmove(new, keys,  newsize);
 818                 } else
 819                         new = NULL;
 820                 isc_mem_put(mctx, keys, oldsize);
 821                 keys = new;
 822                 keycount = i;
 823         }
 824
 825         if (lists != NULL)
 826                 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
 827         if (stack != NULL)
 828                 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
 829
 830         INSIST(keycount == addrcount);
 831
 832         *addrsp = addrs;
 833         *dscpsp = dscps;
 834         *keysp = keys;
 835         *countp = addrcount;
 836
 837         return (ISC_R_SUCCESS);
 838
 839  cleanup:
 840         if (addrs != NULL)
 841                 isc_mem_put(mctx, addrs, addrcount * sizeof(isc_sockaddr_t));
 842         if (dscps != NULL)
 843                 isc_mem_put(mctx, dscps, dscpcount * sizeof(isc_dscp_t));
 844         if (keys != NULL) {
 845                 for (j = 0; j < i; j++) {
 846                         if (keys[j] == NULL)
 847                                 continue;
 848                         if (dns_name_dynamic(keys[j]))
 849                                 dns_name_free(keys[j], mctx);
 850                         isc_mem_put(mctx, keys[j], sizeof(dns_name_t));
 851                 }
 852                 isc_mem_put(mctx, keys, keycount * sizeof(dns_name_t *));
 853         }
 854         if (lists != NULL)
 855                 isc_mem_put(mctx, lists, listcount * sizeof(*lists));
 856         if (stack != NULL)
 857                 isc_mem_put(mctx, stack, stackcount * sizeof(*stack));
 858         return (result);
 859 }
 860
 861 void
 862 ns_config_putipandkeylist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 863                           isc_dscp_t **dscpsp, dns_name_t ***keysp,
 864                           isc_uint32_t count)
 865 {
 866         unsigned int i;
 867         dns_name_t **keys;
 868
 869         REQUIRE(addrsp != NULL && *addrsp != NULL);
 870         REQUIRE(dscpsp == NULL || *dscpsp != NULL);
 871         REQUIRE(keysp != NULL && *keysp != NULL);
 872
 873         keys = *keysp;
 874
 875         isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
 876         if (dscpsp != NULL)
 877                 isc_mem_put(mctx, *dscpsp, count * sizeof(isc_dscp_t));
 878         for (i = 0; i < count; i++) {
 879                 if (keys[i] == NULL)
 880                         continue;
 881                 if (dns_name_dynamic(keys[i]))
 882                         dns_name_free(keys[i], mctx);
 883                 isc_mem_put(mctx, keys[i], sizeof(dns_name_t));
 884         }
 885         isc_mem_put(mctx, *keysp, count * sizeof(dns_name_t *));
 886         *addrsp = NULL;
 887         if (dscpsp != NULL)
 888                 *dscpsp = NULL;
 889         *keysp = NULL;
 890 }
 891
 892 isc_result_t
 893 ns_config_getport(const cfg_obj_t *config, in_port_t *portp) {
 894         const cfg_obj_t *maps[3];
 895         const cfg_obj_t *options = NULL;
 896         const cfg_obj_t *portobj = NULL;
 897         isc_result_t result;
 898         int i;
 899
 900         (void)cfg_map_get(config, "options", &options);
 901         i = 0;
 902         if (options != NULL)
 903                 maps[i++] = options;
 904         maps[i++] = ns_g_defaults;
 905         maps[i] = NULL;
 906
 907         result = ns_config_get(maps, "port", &portobj);
 908         INSIST(result == ISC_R_SUCCESS);
 909         if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
 910                 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 911                             "port '%u' out of range",
 912                             cfg_obj_asuint32(portobj));
 913                 return (ISC_R_RANGE);
 914         }
 915         *portp = (in_port_t)cfg_obj_asuint32(portobj);
 916         return (ISC_R_SUCCESS);
 917 }
 918
 919 isc_result_t
 920 ns_config_getdscp(const cfg_obj_t *config, isc_dscp_t *dscpp) {
 921         const cfg_obj_t *options = NULL;
 922         const cfg_obj_t *dscpobj = NULL;
 923         isc_result_t result;
 924
 925         (void)cfg_map_get(config, "options", &options);
 926         if (options == NULL)
 927                 return (ISC_R_SUCCESS);
 928
 929         result = cfg_map_get(options, "dscp", &dscpobj);
 930         if (result != ISC_R_SUCCESS || dscpobj == NULL) {
 931                 *dscpp = -1;
 932                 return (ISC_R_SUCCESS);
 933         }
 934         if (cfg_obj_asuint32(dscpobj) >= 64) {
 935                 cfg_obj_log(dscpobj, ns_g_lctx, ISC_LOG_ERROR,
 936                             "dscp '%u' out of range",
 937                             cfg_obj_asuint32(dscpobj));
 938                 return (ISC_R_RANGE);
 939         }
 940         *dscpp = (isc_dscp_t)cfg_obj_asuint32(dscpobj);
 941         return (ISC_R_SUCCESS);
 942 }
 943
 944 struct keyalgorithms {
 945         const char *str;
 946         enum { hmacnone, hmacmd5, hmacsha1, hmacsha224,
 947                hmacsha256, hmacsha384, hmacsha512 } hmac;
 948         unsigned int type;
 949         isc_uint16_t size;
 950 } algorithms[] = {
 951         { "hmac-md5", hmacmd5, DST_ALG_HMACMD5, 128 },
 952         { "hmac-md5.sig-alg.reg.int", hmacmd5, DST_ALG_HMACMD5, 0 },
 953         { "hmac-md5.sig-alg.reg.int.", hmacmd5, DST_ALG_HMACMD5, 0 },
 954         { "hmac-sha1", hmacsha1, DST_ALG_HMACSHA1, 160 },
 955         { "hmac-sha224", hmacsha224, DST_ALG_HMACSHA224, 224 },
 956         { "hmac-sha256", hmacsha256, DST_ALG_HMACSHA256, 256 },
 957         { "hmac-sha384", hmacsha384, DST_ALG_HMACSHA384, 384 },
 958         { "hmac-sha512", hmacsha512, DST_ALG_HMACSHA512, 512 },
 959         {  NULL, hmacnone, DST_ALG_UNKNOWN, 0 }
 960 };
 961
 962 isc_result_t
 963 ns_config_getkeyalgorithm(const char *str, dns_name_t **name,
 964                           isc_uint16_t *digestbits)
 965 {
 966         return (ns_config_getkeyalgorithm2(str, name, NULL, digestbits));
 967 }
 968
 969 isc_result_t
 970 ns_config_getkeyalgorithm2(const char *str, dns_name_t **name,
 971                            unsigned int *typep, isc_uint16_t *digestbits)
 972 {
 973         int i;
 974         size_t len = 0;
 975         isc_uint16_t bits;
 976         isc_result_t result;
 977
 978         for (i = 0; algorithms[i].str != NULL; i++) {
 979                 len = strlen(algorithms[i].str);
 980                 if (strncasecmp(algorithms[i].str, str, len) == 0 &&
 981                     (str[len] == '\0' ||
 982                      (algorithms[i].size != 0 && str[len] == '-')))
 983                         break;
 984         }
 985         if (algorithms[i].str == NULL)
 986                 return (ISC_R_NOTFOUND);
 987         if (str[len] == '-') {
 988                 result = isc_parse_uint16(&bits, str + len + 1, 10);
 989                 if (result != ISC_R_SUCCESS)
 990                         return (result);
 991                 if (bits > algorithms[i].size)
 992                         return (ISC_R_RANGE);
 993         } else if (algorithms[i].size == 0)
 994                 bits = 128;
 995         else
 996                 bits = algorithms[i].size;
 997
 998         if (name != NULL) {
 999                 switch (algorithms[i].hmac) {
1000                 case hmacmd5: *name = dns_tsig_hmacmd5_name; break;
1001                 case hmacsha1: *name = dns_tsig_hmacsha1_name; break;
1002                 case hmacsha224: *name = dns_tsig_hmacsha224_name; break;
1003                 case hmacsha256: *name = dns_tsig_hmacsha256_name; break;
1004                 case hmacsha384: *name = dns_tsig_hmacsha384_name; break;
1005                 case hmacsha512: *name = dns_tsig_hmacsha512_name; break;
1006                 default:
1007                         INSIST(0);
1008                 }
1009         }
1010         if (typep != NULL)
1011                 *typep = algorithms[i].type;
1012         if (digestbits != NULL)
1013                 *digestbits = bits;
1014         return (ISC_R_SUCCESS);
1015 }