contrib/bind-9.2.4rc7/bin/named/config.c

   1 /*
   2  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 2001, 2002  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and 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 1.11.2.6 2004/04/19 23:15:38 marka Exp $ */
  19
  20 #include <config.h>
  21
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include <isc/buffer.h>
  26 #include <isc/log.h>
  27 #include <isc/mem.h>
  28 #include <isc/region.h>
  29 #include <isc/result.h>
  30 #include <isc/sockaddr.h>
  31 #include <isc/util.h>
  32
  33 #include <isccfg/cfg.h>
  34
  35 #include <dns/fixedname.h>
  36 #include <dns/name.h>
  37 #include <dns/rdataclass.h>
  38 #include <dns/tsig.h>
  39 #include <dns/zone.h>
  40
  41 #include <named/config.h>
  42 #include <named/globals.h>
  43
  44 static char defaultconf[] = "\
  45 options {\n\
  46 #       blackhole {none;};\n"
  47 #ifndef WIN32
  48 "       coresize default;\n\
  49         datasize default;\n\
  50         files default;\n\
  51         stacksize default;\n"
  52 #endif
  53 "       deallocate-on-exit true;\n\
  54 #       directory <none>\n\
  55         dump-file \"named_dump.db\";\n\
  56         fake-iquery no;\n\
  57         has-old-clients false;\n\
  58         heartbeat-interval 60;\n\
  59         host-statistics no;\n\
  60         interface-interval 60;\n\
  61         listen-on {any;};\n\
  62         listen-on-v6 {none;};\n\
  63         match-mapped-addresses no;\n\
  64         memstatistics-file \"named.memstats\";\n\
  65         multiple-cnames no;\n\
  66 #       named-xfer <obsolete>;\n\
  67 #       pid-file \"" NS_LOCALSTATEDIR "/named.pid\"; /* or /lwresd.pid */\n\
  68         port 53;\n\
  69 "
  70 #ifdef PATH_RANDOMDEV
  71 "\
  72         random-device \"" PATH_RANDOMDEV "\";\n\
  73 "
  74 #endif
  75 "\
  76         recursive-clients 1000;\n\
  77         rrset-order {order cyclic;};\n\
  78         serial-queries 20;\n\
  79         serial-query-rate 20;\n\
  80         statistics-file \"named.stats\";\n\
  81         statistics-interval 60;\n\
  82         tcp-clients 100;\n\
  83 #       tkey-dhkey <none>\n\
  84 #       tkey-gssapi-credential <none>\n\
  85 #       tkey-domain <none>\n\
  86         transfers-per-ns 2;\n\
  87         transfers-in 10;\n\
  88         transfers-out 10;\n\
  89         treat-cr-as-space true;\n\
  90         use-id-pool true;\n\
  91         use-ixfr true;\n\
  92         version \""VERSION"\";\n\
  93 \n\
  94         /* view */\n\
  95         allow-notify {none;};\n\
  96         allow-update-forwarding {none;};\n\
  97         allow-recursion {any;};\n\
  98         allow-v6-synthesis {none;};\n\
  99 #       sortlist <none>\n\
 100 #       topology <none>\n\
 101         auth-nxdomain false;\n\
 102         minimal-responses false;\n\
 103         recursion true;\n\
 104         provide-ixfr true;\n\
 105         request-ixfr true;\n\
 106         fetch-glue no;\n\
 107         rfc2308-type1 no;\n\
 108         additional-from-auth true;\n\
 109         additional-from-cache true;\n\
 110         query-source address *;\n\
 111         query-source-v6 address *;\n\
 112         notify-source *;\n\
 113         notify-source-v6 *;\n\
 114         cleaning-interval 60;\n\
 115         min-roots 2;\n\
 116         lame-ttl 600;\n\
 117         max-ncache-ttl 10800; /* 3 hours */\n\
 118         max-cache-ttl 604800; /* 1 week */\n\
 119         transfer-format many-answers;\n\
 120         max-cache-size 0;\n\
 121         check-names master ignore;\n\
 122         check-names slave ignore;\n\
 123         check-names response ignore;\n\
 124 \n\
 125         /* zone */\n\
 126         allow-query {any;};\n\
 127         allow-transfer {any;};\n\
 128         notify yes;\n\
 129 #       also-notify <none>\n\
 130         dialup no;\n\
 131 #       forward <none>\n\
 132 #       forwarders <none>\n\
 133         maintain-ixfr-base no;\n\
 134 #       max-ixfr-log-size <obsolete>\n\
 135         transfer-source *;\n\
 136         transfer-source-v6 *;\n\
 137         max-transfer-time-in 120;\n\
 138         max-transfer-time-out 120;\n\
 139         max-transfer-idle-in 60;\n\
 140         max-transfer-idle-out 60;\n\
 141         max-retry-time 1209600; /* 2 weeks */\n\
 142         min-retry-time 500;\n\
 143         max-refresh-time 2419200; /* 4 weeks */\n\
 144         min-refresh-time 300;\n\
 145         sig-validity-interval 30; /* days */\n\
 146         zone-statistics false;\n\
 147 };";
 148
 149 isc_result_t
 150 ns_config_parsedefaults(cfg_parser_t *parser, cfg_obj_t **conf) {
 151         isc_buffer_t b;
 152
 153         isc_buffer_init(&b, defaultconf, sizeof(defaultconf) - 1);
 154         isc_buffer_add(&b, sizeof(defaultconf) - 1);
 155         return (cfg_parse_buffer(parser, &b, &cfg_type_namedconf, conf));
 156 }
 157
 158 isc_result_t
 159 ns_config_get(cfg_obj_t **maps, const char* name, cfg_obj_t **obj) {
 160         int i;
 161
 162         for (i = 0; ; i++) {
 163                 if (maps[i] == NULL)
 164                         return (ISC_R_NOTFOUND);
 165                 if (cfg_map_get(maps[i], name, obj) == ISC_R_SUCCESS)
 166                         return (ISC_R_SUCCESS);
 167         }
 168 }
 169
 170 int
 171 ns_config_listcount(cfg_obj_t *list) {
 172         cfg_listelt_t *e;
 173         int i = 0;
 174
 175         for (e = cfg_list_first(list); e != NULL; e = cfg_list_next(e))
 176                 i++;
 177
 178         return (i);
 179 }
 180
 181 isc_result_t
 182 ns_config_getclass(cfg_obj_t *classobj, dns_rdataclass_t defclass,
 183                    dns_rdataclass_t *classp) {
 184         char *str;
 185         isc_textregion_t r;
 186         isc_result_t result;
 187
 188         if (!cfg_obj_isstring(classobj)) {
 189                 *classp = defclass;
 190                 return (ISC_R_SUCCESS);
 191         }
 192         str = cfg_obj_asstring(classobj);
 193         r.base = str;
 194         r.length = strlen(str);
 195         result = dns_rdataclass_fromtext(classp, &r);
 196         if (result != ISC_R_SUCCESS)
 197                 cfg_obj_log(classobj, ns_g_lctx, ISC_LOG_ERROR,
 198                             "unknown class '%s'", str);
 199         return (result);
 200 }
 201
 202 dns_zonetype_t
 203 ns_config_getzonetype(cfg_obj_t *zonetypeobj) {
 204         dns_zonetype_t ztype = dns_zone_none;
 205         char *str;
 206
 207         str = cfg_obj_asstring(zonetypeobj);
 208         if (strcasecmp(str, "master") == 0)
 209                 ztype = dns_zone_master;
 210         else if (strcasecmp(str, "slave") == 0)
 211                 ztype = dns_zone_slave;
 212         else if (strcasecmp(str, "stub") == 0)
 213                 ztype = dns_zone_stub;
 214         else
 215                 INSIST(0);
 216         return (ztype);
 217 }
 218
 219 isc_result_t
 220 ns_config_getiplist(cfg_obj_t *config, cfg_obj_t *list,
 221                     in_port_t defport, isc_mem_t *mctx,
 222                     isc_sockaddr_t **addrsp, isc_uint32_t *countp)
 223 {
 224         int count, i = 0;
 225         cfg_obj_t *addrlist;
 226         cfg_obj_t *portobj;
 227         cfg_listelt_t *element;
 228         isc_sockaddr_t *addrs;
 229         in_port_t port;
 230         isc_result_t result;
 231
 232         INSIST(addrsp != NULL && *addrsp == NULL);
 233
 234         addrlist = cfg_tuple_get(list, "addresses");
 235         count = ns_config_listcount(addrlist);
 236
 237         portobj = cfg_tuple_get(list, "port");
 238         if (cfg_obj_isuint32(portobj)) {
 239                 isc_uint32_t val = cfg_obj_asuint32(portobj);
 240                 if (val > ISC_UINT16_MAX) {
 241                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 242                                     "port '%u' out of range", val);
 243                         return (ISC_R_RANGE);
 244                 }
 245                 port = (in_port_t) val;
 246         } else if (defport != 0)
 247                 port = defport;
 248         else {
 249                 result = ns_config_getport(config, &port);
 250                 if (result != ISC_R_SUCCESS)
 251                         return (result);
 252         }
 253
 254         addrs = isc_mem_get(mctx, count * sizeof(isc_sockaddr_t));
 255         if (addrs == NULL)
 256                 return (ISC_R_NOMEMORY);
 257
 258         for (element = cfg_list_first(addrlist);
 259              element != NULL;
 260              element = cfg_list_next(element), i++)
 261         {
 262                 INSIST(i < count);
 263                 addrs[i] = *cfg_obj_assockaddr(cfg_listelt_value(element));
 264                 if (isc_sockaddr_getport(&addrs[i]) == 0)
 265                         isc_sockaddr_setport(&addrs[i], port);
 266         }
 267         INSIST(i == count);
 268
 269         *addrsp = addrs;
 270         *countp = count;
 271
 272         return (ISC_R_SUCCESS);
 273 }
 274
 275 void
 276 ns_config_putiplist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 277                     isc_uint32_t count)
 278 {
 279         INSIST(addrsp != NULL && *addrsp != NULL);
 280
 281         isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
 282         *addrsp = NULL;
 283 }
 284
 285 isc_result_t
 286 ns_config_getipandkeylist(cfg_obj_t *config, cfg_obj_t *list, isc_mem_t *mctx,
 287                           isc_sockaddr_t **addrsp, dns_name_t ***keysp,
 288                           isc_uint32_t *countp)
 289 {
 290         isc_uint32_t count, i = 0;
 291         isc_result_t result;
 292         cfg_listelt_t *element;
 293         cfg_obj_t *addrlist;
 294         cfg_obj_t *portobj;
 295         in_port_t port;
 296         dns_fixedname_t fname;
 297         isc_sockaddr_t *addrs = NULL;
 298         dns_name_t **keys = NULL;
 299
 300         INSIST(addrsp != NULL && *addrsp == NULL);
 301
 302         addrlist = cfg_tuple_get(list, "addresses");
 303         count = ns_config_listcount(addrlist);
 304
 305         portobj = cfg_tuple_get(list, "port");
 306         if (cfg_obj_isuint32(portobj)) {
 307                 isc_uint32_t val = cfg_obj_asuint32(portobj);
 308                 if (val > ISC_UINT16_MAX) {
 309                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 310                                     "port '%u' out of range", val);
 311                         return (ISC_R_RANGE);
 312                 }
 313                 port = (in_port_t) val;
 314         } else {
 315                 result = ns_config_getport(config, &port);
 316                 if (result != ISC_R_SUCCESS)
 317                         return (result);
 318         }
 319
 320         result = ISC_R_NOMEMORY;
 321
 322         addrs = isc_mem_get(mctx, count * sizeof(isc_sockaddr_t));
 323         if (addrs == NULL)
 324                 goto cleanup;
 325
 326         keys = isc_mem_get(mctx, count * sizeof(dns_name_t *));
 327         if (keys == NULL)
 328                 goto cleanup;
 329
 330         for (element = cfg_list_first(addrlist);
 331              element != NULL;
 332              element = cfg_list_next(element), i++)
 333         {
 334                 cfg_obj_t *addr;
 335                 cfg_obj_t *key;
 336                 char *keystr;
 337                 isc_buffer_t b;
 338
 339                 INSIST(i < count);
 340
 341                 addr = cfg_tuple_get(cfg_listelt_value(element), "sockaddr");
 342                 key = cfg_tuple_get(cfg_listelt_value(element), "key");
 343
 344                 addrs[i] = *cfg_obj_assockaddr(addr);
 345                 if (isc_sockaddr_getport(&addrs[i]) == 0)
 346                         isc_sockaddr_setport(&addrs[i], port);
 347
 348                 keys[i] = NULL;
 349                 if (!cfg_obj_isstring(key))
 350                         continue;
 351                 keys[i] = isc_mem_get(mctx, sizeof(dns_name_t));
 352                 if (keys[i] == NULL)
 353                         goto cleanup;
 354                 dns_name_init(keys[i], NULL);
 355
 356                 keystr = cfg_obj_asstring(key);
 357                 isc_buffer_init(&b, keystr, strlen(keystr));
 358                 isc_buffer_add(&b, strlen(keystr));
 359                 dns_fixedname_init(&fname);
 360                 result = dns_name_fromtext(dns_fixedname_name(&fname), &b,
 361                                            dns_rootname, ISC_FALSE, NULL);
 362                 if (result != ISC_R_SUCCESS)
 363                         goto cleanup;
 364                 result = dns_name_dup(dns_fixedname_name(&fname), mctx,
 365                                       keys[i]);
 366                 if (result != ISC_R_SUCCESS)
 367                         goto cleanup;
 368         }
 369         INSIST(i == count);
 370
 371         *addrsp = addrs;
 372         *keysp = keys;
 373         *countp = count;
 374
 375         return (ISC_R_SUCCESS);
 376
 377  cleanup:
 378         if (addrs != NULL)
 379                 isc_mem_put(mctx, addrs, count * sizeof(isc_sockaddr_t));
 380         if (keys != NULL) {
 381                 unsigned int j;
 382                 for (j = 0 ; j <= i; j++) {
 383                         if (keys[j] == NULL)
 384                                 continue;
 385                         if (dns_name_dynamic(keys[j]))
 386                                 dns_name_free(keys[j], mctx);
 387                         isc_mem_put(mctx, keys[j], sizeof(dns_name_t));
 388                 }
 389                 isc_mem_put(mctx, keys, count * sizeof(dns_name_t *));
 390         }
 391         return (result);
 392 }
 393
 394 void
 395 ns_config_putipandkeylist(isc_mem_t *mctx, isc_sockaddr_t **addrsp,
 396                           dns_name_t ***keysp, isc_uint32_t count)
 397 {
 398         unsigned int i;
 399         dns_name_t **keys = *keysp;
 400
 401         INSIST(addrsp != NULL && *addrsp != NULL);
 402
 403         isc_mem_put(mctx, *addrsp, count * sizeof(isc_sockaddr_t));
 404         for (i = 0; i < count; i++) {
 405                 if (keys[i] == NULL)
 406                         continue;
 407                 if (dns_name_dynamic(keys[i]))
 408                         dns_name_free(keys[i], mctx);
 409                 isc_mem_put(mctx, keys[i], sizeof(dns_name_t));
 410         }
 411         isc_mem_put(mctx, *keysp, count * sizeof(dns_name_t *));
 412         *addrsp = NULL;
 413         *keysp = NULL;
 414 }
 415
 416 isc_result_t
 417 ns_config_getport(cfg_obj_t *config, in_port_t *portp) {
 418         cfg_obj_t *maps[3];
 419         cfg_obj_t *options = NULL;
 420         cfg_obj_t *portobj = NULL;
 421         isc_result_t result;
 422         int i;
 423
 424         cfg_map_get(config, "options", &options);
 425         i = 0;
 426         if (options != NULL)
 427                 maps[i++] = options;
 428         maps[i++] = ns_g_defaults;
 429         maps[i] = NULL;
 430
 431         result = ns_config_get(maps, "port", &portobj);
 432         INSIST(result == ISC_R_SUCCESS);
 433         if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
 434                 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
 435                             "port '%u' out of range",
 436                             cfg_obj_asuint32(portobj));
 437                 return (ISC_R_RANGE);
 438         }
 439         *portp = (in_port_t)cfg_obj_asuint32(portobj);
 440         return (ISC_R_SUCCESS);
 441 }
 442
 443 isc_result_t
 444 ns_config_getkeyalgorithm(const char *str, dns_name_t **name)
 445 {
 446         if (strcasecmp(str, "hmac-md5") == 0 ||
 447             strcasecmp(str, "hmac-md5.sig-alg.reg.int") == 0 ||
 448             strcasecmp(str, "hmac-md5.sig-alg.reg.int.") == 0)
 449         {
 450                 if (name != NULL)
 451                         *name = dns_tsig_hmacmd5_name;
 452                 return (ISC_R_SUCCESS);
 453         }
 454         return (ISC_R_NOTFOUND);
 455 }