contrib/bind-9.3/bin/named/server.c

   1 /*
   2  * Copyright (C) 2004-2006  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1999-2003  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: server.c,v 1.339.2.15.2.70 2006/05/24 04:30:24 marka Exp $ */
  19
  20 #include <config.h>
  21
  22 #include <stdlib.h>
  23
  24 #include <isc/app.h>
  25 #include <isc/base64.h>
  26 #include <isc/dir.h>
  27 #include <isc/entropy.h>
  28 #include <isc/file.h>
  29 #include <isc/hash.h>
  30 #include <isc/lex.h>
  31 #include <isc/parseint.h>
  32 #include <isc/print.h>
  33 #include <isc/resource.h>
  34 #include <isc/stdio.h>
  35 #include <isc/string.h>
  36 #include <isc/task.h>
  37 #include <isc/timer.h>
  38 #include <isc/util.h>
  39
  40 #include <isccfg/namedconf.h>
  41
  42 #include <bind9/check.h>
  43
  44 #include <dns/adb.h>
  45 #include <dns/cache.h>
  46 #include <dns/db.h>
  47 #include <dns/dispatch.h>
  48 #include <dns/forward.h>
  49 #include <dns/journal.h>
  50 #include <dns/keytable.h>
  51 #include <dns/master.h>
  52 #include <dns/masterdump.h>
  53 #include <dns/order.h>
  54 #include <dns/peer.h>
  55 #include <dns/portlist.h>
  56 #include <dns/rdataclass.h>
  57 #include <dns/rdataset.h>
  58 #include <dns/rdatastruct.h>
  59 #include <dns/resolver.h>
  60 #include <dns/rootns.h>
  61 #include <dns/secalg.h>
  62 #include <dns/stats.h>
  63 #include <dns/tkey.h>
  64 #include <dns/view.h>
  65 #include <dns/zone.h>
  66 #include <dns/zt.h>
  67
  68 #include <dst/dst.h>
  69 #include <dst/result.h>
  70
  71 #include <named/client.h>
  72 #include <named/config.h>
  73 #include <named/control.h>
  74 #include <named/interfacemgr.h>
  75 #include <named/log.h>
  76 #include <named/logconf.h>
  77 #include <named/lwresd.h>
  78 #include <named/main.h>
  79 #include <named/os.h>
  80 #include <named/server.h>
  81 #include <named/tkeyconf.h>
  82 #include <named/tsigconf.h>
  83 #include <named/zoneconf.h>
  84 #ifdef HAVE_LIBSCF
  85 #include <named/ns_smf_globals.h>
  86 #include <stdlib.h>
  87 #endif
  88
  89 /*
  90  * Check an operation for failure.  Assumes that the function
  91  * using it has a 'result' variable and a 'cleanup' label.
  92  */
  93 #define CHECK(op) \
  94         do { result = (op);                                      \
  95                if (result != ISC_R_SUCCESS) goto cleanup;        \
  96         } while (0)
  97
  98 #define CHECKM(op, msg) \
  99         do { result = (op);                                       \
 100                if (result != ISC_R_SUCCESS) {                     \
 101                         isc_log_write(ns_g_lctx,                  \
 102                                       NS_LOGCATEGORY_GENERAL,     \
 103                                       NS_LOGMODULE_SERVER,        \
 104                                       ISC_LOG_ERROR,              \
 105                                       "%s: %s", msg,              \
 106                                       isc_result_totext(result)); \
 107                         goto cleanup;                             \
 108                 }                                                 \
 109         } while (0)                                               \
 110
 111 #define CHECKMF(op, msg, file) \
 112         do { result = (op);                                       \
 113                if (result != ISC_R_SUCCESS) {                     \
 114                         isc_log_write(ns_g_lctx,                  \
 115                                       NS_LOGCATEGORY_GENERAL,     \
 116                                       NS_LOGMODULE_SERVER,        \
 117                                       ISC_LOG_ERROR,              \
 118                                       "%s '%s': %s", msg, file,   \
 119                                       isc_result_totext(result)); \
 120                         goto cleanup;                             \
 121                 }                                                 \
 122         } while (0)                                               \
 123
 124 #define CHECKFATAL(op, msg) \
 125         do { result = (op);                                       \
 126                if (result != ISC_R_SUCCESS)                       \
 127                         fatal(msg, result);                       \
 128         } while (0)                                               \
 129
 130 struct ns_dispatch {
 131         isc_sockaddr_t                  addr;
 132         unsigned int                    dispatchgen;
 133         dns_dispatch_t                  *dispatch;
 134         ISC_LINK(struct ns_dispatch)    link;
 135 };
 136
 137 struct dumpcontext {
 138         isc_mem_t                       *mctx;
 139         isc_boolean_t                   dumpcache;
 140         isc_boolean_t                   dumpzones;
 141         FILE                            *fp;
 142         ISC_LIST(struct viewlistentry)  viewlist;
 143         struct viewlistentry            *view;
 144         struct zonelistentry            *zone;
 145         dns_dumpctx_t                   *mdctx;
 146         dns_db_t                        *db;
 147         dns_db_t                        *cache;
 148         isc_task_t                      *task;
 149         dns_dbversion_t                 *version;
 150 };
 151
 152 struct viewlistentry {
 153         dns_view_t                      *view;
 154         ISC_LINK(struct viewlistentry)  link;
 155         ISC_LIST(struct zonelistentry)  zonelist;
 156 };
 157
 158 struct zonelistentry {
 159         dns_zone_t                      *zone;
 160         ISC_LINK(struct zonelistentry)  link;
 161 };
 162
 163 static void
 164 fatal(const char *msg, isc_result_t result);
 165
 166 static void
 167 ns_server_reload(isc_task_t *task, isc_event_t *event);
 168
 169 static isc_result_t
 170 ns_listenelt_fromconfig(const cfg_obj_t *listener, const cfg_obj_t *config,
 171                         ns_aclconfctx_t *actx,
 172                         isc_mem_t *mctx, ns_listenelt_t **target);
 173 static isc_result_t
 174 ns_listenlist_fromconfig(const cfg_obj_t *listenlist, const cfg_obj_t *config,
 175                          ns_aclconfctx_t *actx,
 176                          isc_mem_t *mctx, ns_listenlist_t **target);
 177
 178 static isc_result_t
 179 configure_forward(const cfg_obj_t *config, dns_view_t *view, dns_name_t *origin,
 180                   const cfg_obj_t *forwarders, const cfg_obj_t *forwardtype);
 181
 182 static isc_result_t
 183 configure_alternates(const cfg_obj_t *config, dns_view_t *view,
 184                      const cfg_obj_t *alternates);
 185
 186 static isc_result_t
 187 configure_zone(const cfg_obj_t *config, const cfg_obj_t *zconfig,
 188                const cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
 189                ns_aclconfctx_t *aclconf);
 190
 191 static void
 192 end_reserved_dispatches(ns_server_t *server, isc_boolean_t all);
 193
 194 /*
 195  * Configure a single view ACL at '*aclp'.  Get its configuration by
 196  * calling 'getvcacl' (for per-view configuration) and maybe 'getscacl'
 197  * (for a global default).
 198  */
 199 static isc_result_t
 200 configure_view_acl(const cfg_obj_t *vconfig, const cfg_obj_t *config,
 201                    const char *aclname, ns_aclconfctx_t *actx,
 202                    isc_mem_t *mctx, dns_acl_t **aclp)
 203 {
 204         isc_result_t result;
 205         const cfg_obj_t *maps[3];
 206         const cfg_obj_t *aclobj = NULL;
 207         int i = 0;
 208
 209         if (*aclp != NULL)
 210                 dns_acl_detach(aclp);
 211         if (vconfig != NULL)
 212                 maps[i++] = cfg_tuple_get(vconfig, "options");
 213         if (config != NULL) {
 214                 const cfg_obj_t *options = NULL;
 215                 (void)cfg_map_get(config, "options", &options);
 216                 if (options != NULL)
 217                         maps[i++] = options;
 218         }
 219         maps[i] = NULL;
 220
 221         (void)ns_config_get(maps, aclname, &aclobj);
 222         if (aclobj == NULL)
 223                 /*
 224                  * No value available.  *aclp == NULL.
 225                  */
 226                 return (ISC_R_SUCCESS);
 227
 228         result = ns_acl_fromconfig(aclobj, config, actx, mctx, aclp);
 229
 230         return (result);
 231 }
 232
 233 static isc_result_t
 234 configure_view_dnsseckey(const cfg_obj_t *vconfig, const cfg_obj_t *key,
 235                          dns_keytable_t *keytable, isc_mem_t *mctx)
 236 {
 237         dns_rdataclass_t viewclass;
 238         dns_rdata_dnskey_t keystruct;
 239         isc_uint32_t flags, proto, alg;
 240         const char *keystr, *keynamestr;
 241         unsigned char keydata[4096];
 242         isc_buffer_t keydatabuf;
 243         unsigned char rrdata[4096];
 244         isc_buffer_t rrdatabuf;
 245         isc_region_t r;
 246         dns_fixedname_t fkeyname;
 247         dns_name_t *keyname;
 248         isc_buffer_t namebuf;
 249         isc_result_t result;
 250         dst_key_t *dstkey = NULL;
 251
 252         flags = cfg_obj_asuint32(cfg_tuple_get(key, "flags"));
 253         proto = cfg_obj_asuint32(cfg_tuple_get(key, "protocol"));
 254         alg = cfg_obj_asuint32(cfg_tuple_get(key, "algorithm"));
 255         keyname = dns_fixedname_name(&fkeyname);
 256         keynamestr = cfg_obj_asstring(cfg_tuple_get(key, "name"));
 257
 258         if (vconfig == NULL)
 259                 viewclass = dns_rdataclass_in;
 260         else {
 261                 const cfg_obj_t *classobj = cfg_tuple_get(vconfig, "class");
 262                 CHECK(ns_config_getclass(classobj, dns_rdataclass_in,
 263                                          &viewclass));
 264         }
 265         keystruct.common.rdclass = viewclass;
 266         keystruct.common.rdtype = dns_rdatatype_dnskey;
 267         /*
 268          * The key data in keystruct is not dynamically allocated.
 269          */
 270         keystruct.mctx = NULL;
 271
 272         ISC_LINK_INIT(&keystruct.common, link);
 273
 274         if (flags > 0xffff)
 275                 CHECKM(ISC_R_RANGE, "key flags");
 276         if (proto > 0xff)
 277                 CHECKM(ISC_R_RANGE, "key protocol");
 278         if (alg > 0xff)
 279                 CHECKM(ISC_R_RANGE, "key algorithm");
 280         keystruct.flags = (isc_uint16_t)flags;
 281         keystruct.protocol = (isc_uint8_t)proto;
 282         keystruct.algorithm = (isc_uint8_t)alg;
 283
 284         isc_buffer_init(&keydatabuf, keydata, sizeof(keydata));
 285         isc_buffer_init(&rrdatabuf, rrdata, sizeof(rrdata));
 286
 287         keystr = cfg_obj_asstring(cfg_tuple_get(key, "key"));
 288         CHECK(isc_base64_decodestring(keystr, &keydatabuf));
 289         isc_buffer_usedregion(&keydatabuf, &r);
 290         keystruct.datalen = r.length;
 291         keystruct.data = r.base;
 292
 293         CHECK(dns_rdata_fromstruct(NULL,
 294                                    keystruct.common.rdclass,
 295                                    keystruct.common.rdtype,
 296                                    &keystruct, &rrdatabuf));
 297         dns_fixedname_init(&fkeyname);
 298         isc_buffer_init(&namebuf, keynamestr, strlen(keynamestr));
 299         isc_buffer_add(&namebuf, strlen(keynamestr));
 300         CHECK(dns_name_fromtext(keyname, &namebuf,
 301                                 dns_rootname, ISC_FALSE,
 302                                 NULL));
 303         CHECK(dst_key_fromdns(keyname, viewclass, &rrdatabuf,
 304                               mctx, &dstkey));
 305
 306         CHECK(dns_keytable_add(keytable, &dstkey));
 307         INSIST(dstkey == NULL);
 308         return (ISC_R_SUCCESS);
 309
 310  cleanup:
 311         if (result == DST_R_NOCRYPTO) {
 312                 cfg_obj_log(key, ns_g_lctx, ISC_LOG_ERROR,
 313                             "ignoring trusted key for '%s': no crypto support",
 314                             keynamestr);
 315                 result = ISC_R_SUCCESS;
 316         } else {
 317                 cfg_obj_log(key, ns_g_lctx, ISC_LOG_ERROR,
 318                             "configuring trusted key for '%s': %s",
 319                             keynamestr, isc_result_totext(result));
 320                 result = ISC_R_FAILURE;
 321         }
 322
 323         if (dstkey != NULL)
 324                 dst_key_free(&dstkey);
 325
 326         return (result);
 327 }
 328
 329 /*
 330  * Configure DNSSEC keys for a view.  Currently used only for
 331  * the security roots.
 332  *
 333  * The per-view configuration values and the server-global defaults are read
 334  * from 'vconfig' and 'config'.  The variable to be configured is '*target'.
 335  */
 336 static isc_result_t
 337 configure_view_dnsseckeys(const cfg_obj_t *vconfig, const cfg_obj_t *config,
 338                           isc_mem_t *mctx, dns_keytable_t **target)
 339 {
 340         isc_result_t result;
 341         const cfg_obj_t *keys = NULL;
 342         const cfg_obj_t *voptions = NULL;
 343         const cfg_listelt_t *element, *element2;
 344         const cfg_obj_t *keylist;
 345         const cfg_obj_t *key;
 346         dns_keytable_t *keytable = NULL;
 347
 348         CHECK(dns_keytable_create(mctx, &keytable));
 349
 350         if (vconfig != NULL)
 351                 voptions = cfg_tuple_get(vconfig, "options");
 352
 353         keys = NULL;
 354         if (voptions != NULL)
 355                 (void)cfg_map_get(voptions, "trusted-keys", &keys);
 356         if (keys == NULL)
 357                 (void)cfg_map_get(config, "trusted-keys", &keys);
 358
 359         for (element = cfg_list_first(keys);
 360              element != NULL;
 361              element = cfg_list_next(element))
 362         {
 363                 keylist = cfg_listelt_value(element);
 364                 for (element2 = cfg_list_first(keylist);
 365                      element2 != NULL;
 366                      element2 = cfg_list_next(element2))
 367                 {
 368                         key = cfg_listelt_value(element2);
 369                         CHECK(configure_view_dnsseckey(vconfig, key,
 370                                                        keytable, mctx));
 371                 }
 372         }
 373
 374         dns_keytable_detach(target);
 375         *target = keytable; /* Transfer ownership. */
 376         keytable = NULL;
 377         result = ISC_R_SUCCESS;
 378
 379  cleanup:
 380         return (result);
 381 }
 382
 383 static isc_result_t
 384 mustbesecure(const cfg_obj_t *mbs, dns_resolver_t *resolver)
 385 {
 386         const cfg_listelt_t *element;
 387         const cfg_obj_t *obj;
 388         const char *str;
 389         dns_fixedname_t fixed;
 390         dns_name_t *name;
 391         isc_boolean_t value;
 392         isc_result_t result;
 393         isc_buffer_t b;
 394
 395         dns_fixedname_init(&fixed);
 396         name = dns_fixedname_name(&fixed);
 397         for (element = cfg_list_first(mbs);
 398              element != NULL;
 399              element = cfg_list_next(element))
 400         {
 401                 obj = cfg_listelt_value(element);
 402                 str = cfg_obj_asstring(cfg_tuple_get(obj, "name"));
 403                 isc_buffer_init(&b, str, strlen(str));
 404                 isc_buffer_add(&b, strlen(str));
 405                 CHECK(dns_name_fromtext(name, &b, dns_rootname,
 406                                         ISC_FALSE, NULL));
 407                 value = cfg_obj_asboolean(cfg_tuple_get(obj, "value"));
 408                 CHECK(dns_resolver_setmustbesecure(resolver, name, value));
 409         }
 410
 411         result = ISC_R_SUCCESS;
 412
 413  cleanup:
 414         return (result);
 415 }
 416
 417 /*
 418  * Get a dispatch appropriate for the resolver of a given view.
 419  */
 420 static isc_result_t
 421 get_view_querysource_dispatch(const cfg_obj_t **maps,
 422                               int af, dns_dispatch_t **dispatchp)
 423 {
 424         isc_result_t result;
 425         dns_dispatch_t *disp;
 426         isc_sockaddr_t sa;
 427         unsigned int attrs, attrmask;
 428         const cfg_obj_t *obj = NULL;
 429
 430         /*
 431          * Make compiler happy.
 432          */
 433         result = ISC_R_FAILURE;
 434
 435         switch (af) {
 436         case AF_INET:
 437                 result = ns_config_get(maps, "query-source", &obj);
 438                 INSIST(result == ISC_R_SUCCESS);
 439                 break;
 440         case AF_INET6:
 441                 result = ns_config_get(maps, "query-source-v6", &obj);
 442                 INSIST(result == ISC_R_SUCCESS);
 443                 break;
 444         default:
 445                 INSIST(0);
 446         }
 447
 448         sa = *(cfg_obj_assockaddr(obj));
 449         INSIST(isc_sockaddr_pf(&sa) == af);
 450
 451         /*
 452          * If we don't support this address family, we're done!
 453          */
 454         switch (af) {
 455         case AF_INET:
 456                 result = isc_net_probeipv4();
 457                 break;
 458         case AF_INET6:
 459                 result = isc_net_probeipv6();
 460                 break;
 461         default:
 462                 INSIST(0);
 463         }
 464         if (result != ISC_R_SUCCESS)
 465                 return (ISC_R_SUCCESS);
 466
 467         /*
 468          * Try to find a dispatcher that we can share.
 469          */
 470         attrs = 0;
 471         attrs |= DNS_DISPATCHATTR_UDP;
 472         switch (af) {
 473         case AF_INET:
 474                 attrs |= DNS_DISPATCHATTR_IPV4;
 475                 break;
 476         case AF_INET6:
 477                 attrs |= DNS_DISPATCHATTR_IPV6;
 478                 break;
 479         }
 480         attrmask = 0;
 481         attrmask |= DNS_DISPATCHATTR_UDP;
 482         attrmask |= DNS_DISPATCHATTR_TCP;
 483         attrmask |= DNS_DISPATCHATTR_IPV4;
 484         attrmask |= DNS_DISPATCHATTR_IPV6;
 485
 486         disp = NULL;
 487         result = dns_dispatch_getudp(ns_g_dispatchmgr, ns_g_socketmgr,
 488                                      ns_g_taskmgr, &sa, 4096,
 489                                      1000, 32768, 16411, 16433,
 490                                      attrs, attrmask, &disp);
 491         if (result != ISC_R_SUCCESS) {
 492                 isc_sockaddr_t any;
 493                 char buf[ISC_SOCKADDR_FORMATSIZE];
 494
 495                 switch (af) {
 496                 case AF_INET:
 497                         isc_sockaddr_any(&any);
 498                         break;
 499                 case AF_INET6:
 500                         isc_sockaddr_any6(&any);
 501                         break;
 502                 }
 503                 if (isc_sockaddr_equal(&sa, &any))
 504                         return (ISC_R_SUCCESS);
 505                 isc_sockaddr_format(&sa, buf, sizeof(buf));
 506                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 507                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
 508                               "could not get query source dispatcher (%s)",
 509                               buf);
 510                 return (result);
 511         }
 512
 513         *dispatchp = disp;
 514
 515         return (ISC_R_SUCCESS);
 516 }
 517
 518 static isc_result_t
 519 configure_order(dns_order_t *order, const cfg_obj_t *ent) {
 520         dns_rdataclass_t rdclass;
 521         dns_rdatatype_t rdtype;
 522         const cfg_obj_t *obj;
 523         dns_fixedname_t fixed;
 524         unsigned int mode = 0;
 525         const char *str;
 526         isc_buffer_t b;
 527         isc_result_t result;
 528         isc_boolean_t addroot;
 529
 530         result = ns_config_getclass(cfg_tuple_get(ent, "class"),
 531                                     dns_rdataclass_any, &rdclass);
 532         if (result != ISC_R_SUCCESS)
 533                 return (result);
 534
 535         result = ns_config_gettype(cfg_tuple_get(ent, "type"),
 536                                    dns_rdatatype_any, &rdtype);
 537         if (result != ISC_R_SUCCESS)
 538                 return (result);
 539
 540         obj = cfg_tuple_get(ent, "name");
 541         if (cfg_obj_isstring(obj))
 542                 str = cfg_obj_asstring(obj);
 543         else
 544                 str = "*";
 545         addroot = ISC_TF(strcmp(str, "*") == 0);
 546         isc_buffer_init(&b, str, strlen(str));
 547         isc_buffer_add(&b, strlen(str));
 548         dns_fixedname_init(&fixed);
 549         result = dns_name_fromtext(dns_fixedname_name(&fixed), &b,
 550                                    dns_rootname, ISC_FALSE, NULL);
 551         if (result != ISC_R_SUCCESS)
 552                 return (result);
 553
 554         obj = cfg_tuple_get(ent, "ordering");
 555         INSIST(cfg_obj_isstring(obj));
 556         str = cfg_obj_asstring(obj);
 557         if (!strcasecmp(str, "fixed"))
 558                 mode = DNS_RDATASETATTR_FIXEDORDER;
 559         else if (!strcasecmp(str, "random"))
 560                 mode = DNS_RDATASETATTR_RANDOMIZE;
 561         else if (!strcasecmp(str, "cyclic"))
 562                 mode = 0;
 563         else
 564                 INSIST(0);
 565
 566         /*
 567          * "*" should match everything including the root (BIND 8 compat).
 568          * As dns_name_matcheswildcard(".", "*.") returns FALSE add a
 569          * explicit entry for "." when the name is "*".
 570          */
 571         if (addroot) {
 572                 result = dns_order_add(order, dns_rootname,
 573                                        rdtype, rdclass, mode);
 574                 if (result != ISC_R_SUCCESS)
 575                         return (result);
 576         }
 577
 578         return (dns_order_add(order, dns_fixedname_name(&fixed),
 579                               rdtype, rdclass, mode));
 580 }
 581
 582 static isc_result_t
 583 configure_peer(const cfg_obj_t *cpeer, isc_mem_t *mctx, dns_peer_t **peerp) {
 584         const isc_sockaddr_t *sa;
 585         isc_netaddr_t na;
 586         dns_peer_t *peer;
 587         const cfg_obj_t *obj;
 588         const char *str;
 589         isc_result_t result;
 590
 591         sa = cfg_obj_assockaddr(cfg_map_getname(cpeer));
 592         isc_netaddr_fromsockaddr(&na, sa);
 593
 594         peer = NULL;
 595         result = dns_peer_new(mctx, &na, &peer);
 596         if (result != ISC_R_SUCCESS)
 597                 return (result);
 598
 599         obj = NULL;
 600         (void)cfg_map_get(cpeer, "bogus", &obj);
 601         if (obj != NULL)
 602                 CHECK(dns_peer_setbogus(peer, cfg_obj_asboolean(obj)));
 603
 604         obj = NULL;
 605         (void)cfg_map_get(cpeer, "provide-ixfr", &obj);
 606         if (obj != NULL)
 607                 CHECK(dns_peer_setprovideixfr(peer, cfg_obj_asboolean(obj)));
 608
 609         obj = NULL;
 610         (void)cfg_map_get(cpeer, "request-ixfr", &obj);
 611         if (obj != NULL)
 612                 CHECK(dns_peer_setrequestixfr(peer, cfg_obj_asboolean(obj)));
 613
 614         obj = NULL;
 615         (void)cfg_map_get(cpeer, "edns", &obj);
 616         if (obj != NULL)
 617                 CHECK(dns_peer_setsupportedns(peer, cfg_obj_asboolean(obj)));
 618
 619         obj = NULL;
 620         (void)cfg_map_get(cpeer, "transfers", &obj);
 621         if (obj != NULL)
 622                 CHECK(dns_peer_settransfers(peer, cfg_obj_asuint32(obj)));
 623
 624         obj = NULL;
 625         (void)cfg_map_get(cpeer, "transfer-format", &obj);
 626         if (obj != NULL) {
 627                 str = cfg_obj_asstring(obj);
 628                 if (strcasecmp(str, "many-answers") == 0)
 629                         CHECK(dns_peer_settransferformat(peer,
 630                                                          dns_many_answers));
 631                 else if (strcasecmp(str, "one-answer") == 0)
 632                         CHECK(dns_peer_settransferformat(peer,
 633                                                          dns_one_answer));
 634                 else
 635                         INSIST(0);
 636         }
 637
 638         obj = NULL;
 639         (void)cfg_map_get(cpeer, "keys", &obj);
 640         if (obj != NULL) {
 641                 result = dns_peer_setkeybycharp(peer, cfg_obj_asstring(obj));
 642                 if (result != ISC_R_SUCCESS)
 643                         goto cleanup;
 644         }
 645
 646         obj = NULL;
 647         if (isc_sockaddr_pf(sa) == AF_INET)
 648                 (void)cfg_map_get(cpeer, "transfer-source", &obj);
 649         else
 650                 (void)cfg_map_get(cpeer, "transfer-source-v6", &obj);
 651         if (obj != NULL) {
 652                 result = dns_peer_settransfersource(peer,
 653                                                     cfg_obj_assockaddr(obj));
 654                 if (result != ISC_R_SUCCESS)
 655                         goto cleanup;
 656         }
 657         *peerp = peer;
 658         return (ISC_R_SUCCESS);
 659
 660  cleanup:
 661         dns_peer_detach(&peer);
 662         return (result);
 663 }
 664
 665 static isc_result_t
 666 disable_algorithms(const cfg_obj_t *disabled, dns_resolver_t *resolver) {
 667         isc_result_t result;
 668         const cfg_obj_t *algorithms;
 669         const cfg_listelt_t *element;
 670         const char *str;
 671         dns_fixedname_t fixed;
 672         dns_name_t *name;
 673         isc_buffer_t b;
 674
 675         dns_fixedname_init(&fixed);
 676         name = dns_fixedname_name(&fixed);
 677         str = cfg_obj_asstring(cfg_tuple_get(disabled, "name"));
 678         isc_buffer_init(&b, str, strlen(str));
 679         isc_buffer_add(&b, strlen(str));
 680         CHECK(dns_name_fromtext(name, &b, dns_rootname, ISC_FALSE, NULL));
 681
 682         algorithms = cfg_tuple_get(disabled, "algorithms");
 683         for (element = cfg_list_first(algorithms);
 684              element != NULL;
 685              element = cfg_list_next(element))
 686         {
 687                 isc_textregion_t r;
 688                 dns_secalg_t alg;
 689
 690                 DE_CONST(cfg_obj_asstring(cfg_listelt_value(element)), r.base);
 691                 r.length = strlen(r.base);
 692
 693                 result = dns_secalg_fromtext(&alg, &r);
 694                 if (result != ISC_R_SUCCESS) {
 695                         isc_uint8_t ui;
 696                         result = isc_parse_uint8(&ui, r.base, 10);
 697                         alg = ui;
 698                 }
 699                 if (result != ISC_R_SUCCESS) {
 700                         cfg_obj_log(cfg_listelt_value(element),
 701                                     ns_g_lctx, ISC_LOG_ERROR,
 702                                     "invalid algorithm");
 703                         CHECK(result);
 704                 }
 705                 CHECK(dns_resolver_disable_algorithm(resolver, name, alg));
 706         }
 707  cleanup:
 708         return (result);
 709 }
 710
 711 /*
 712  * Configure 'view' according to 'vconfig', taking defaults from 'config'
 713  * where values are missing in 'vconfig'.
 714  *
 715  * When configuring the default view, 'vconfig' will be NULL and the
 716  * global defaults in 'config' used exclusively.
 717  */
 718 static isc_result_t
 719 configure_view(dns_view_t *view, const cfg_obj_t *config,
 720                const cfg_obj_t *vconfig, isc_mem_t *mctx, ns_aclconfctx_t *actx,
 721                isc_boolean_t need_hints)
 722 {
 723         const cfg_obj_t *maps[4];
 724         const cfg_obj_t *cfgmaps[3];
 725         const cfg_obj_t *options = NULL;
 726         const cfg_obj_t *voptions = NULL;
 727         const cfg_obj_t *forwardtype;
 728         const cfg_obj_t *forwarders;
 729         const cfg_obj_t *alternates;
 730         const cfg_obj_t *zonelist;
 731         const cfg_obj_t *disabled;
 732         const cfg_obj_t *obj;
 733         const cfg_listelt_t *element;
 734         in_port_t port;
 735         dns_cache_t *cache = NULL;
 736         isc_result_t result;
 737         isc_uint32_t max_adb_size;
 738         isc_uint32_t max_cache_size;
 739         isc_uint32_t lame_ttl;
 740         dns_tsig_keyring_t *ring;
 741         dns_view_t *pview = NULL;       /* Production view */
 742         isc_mem_t *cmctx;
 743         dns_dispatch_t *dispatch4 = NULL;
 744         dns_dispatch_t *dispatch6 = NULL;
 745         isc_boolean_t reused_cache = ISC_FALSE;
 746         int i;
 747         const char *str;
 748         dns_order_t *order = NULL;
 749         isc_uint32_t udpsize;
 750         unsigned int check = 0;
 751
 752         REQUIRE(DNS_VIEW_VALID(view));
 753
 754         cmctx = NULL;
 755
 756         if (config != NULL)
 757                 (void)cfg_map_get(config, "options", &options);
 758
 759         i = 0;
 760         if (vconfig != NULL) {
 761                 voptions = cfg_tuple_get(vconfig, "options");
 762                 maps[i++] = voptions;
 763         }
 764         if (options != NULL)
 765                 maps[i++] = options;
 766         maps[i++] = ns_g_defaults;
 767         maps[i] = NULL;
 768
 769         i = 0;
 770         if (voptions != NULL)
 771                 cfgmaps[i++] = voptions;
 772         if (config != NULL)
 773                 cfgmaps[i++] = config;
 774         cfgmaps[i] = NULL;
 775
 776         /*
 777          * Set the view's port number for outgoing queries.
 778          */
 779         CHECKM(ns_config_getport(config, &port), "port");
 780         dns_view_setdstport(view, port);
 781
 782         /*
 783          * Configure the zones.
 784          */
 785         zonelist = NULL;
 786         if (voptions != NULL)
 787                 (void)cfg_map_get(voptions, "zone", &zonelist);
 788         else
 789                 (void)cfg_map_get(config, "zone", &zonelist);
 790         for (element = cfg_list_first(zonelist);
 791              element != NULL;
 792              element = cfg_list_next(element))
 793         {
 794                 const cfg_obj_t *zconfig = cfg_listelt_value(element);
 795                 CHECK(configure_zone(config, zconfig, vconfig, mctx, view,
 796                                      actx));
 797         }
 798
 799         /*
 800          * Configure the view's cache.  Try to reuse an existing
 801          * cache if possible, otherwise create a new cache.
 802          * Note that the ADB is not preserved in either case.
 803          *
 804          * XXX Determining when it is safe to reuse a cache is
 805          * tricky.  When the view's configuration changes, the cached
 806          * data may become invalid because it reflects our old
 807          * view of the world.  As more view attributes become
 808          * configurable, we will have to add code here to check
 809          * whether they have changed in ways that could
 810          * invalidate the cache.
 811          */
 812         result = dns_viewlist_find(&ns_g_server->viewlist,
 813                                    view->name, view->rdclass,
 814                                    &pview);
 815         if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
 816                 goto cleanup;
 817         if (pview != NULL) {
 818                 INSIST(pview->cache != NULL);
 819                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 820                               NS_LOGMODULE_SERVER, ISC_LOG_DEBUG(3),
 821                               "reusing existing cache");
 822                 reused_cache = ISC_TRUE;
 823                 dns_cache_attach(pview->cache, &cache);
 824                 dns_view_detach(&pview);
 825         } else {
 826                 CHECK(isc_mem_create(0, 0, &cmctx));
 827                 CHECK(dns_cache_create(cmctx, ns_g_taskmgr, ns_g_timermgr,
 828                                        view->rdclass, "rbt", 0, NULL, &cache));
 829         }
 830         dns_view_setcache(view, cache);
 831
 832         /*
 833          * cache-file cannot be inherited if views are present, but this
 834          * should be caught by the configuration checking stage.
 835          */
 836         obj = NULL;
 837         result = ns_config_get(maps, "cache-file", &obj);
 838         if (result == ISC_R_SUCCESS && strcmp(view->name, "_bind") != 0) {
 839                 CHECK(dns_cache_setfilename(cache, cfg_obj_asstring(obj)));
 840                 if (!reused_cache)
 841                         CHECK(dns_cache_load(cache));
 842         }
 843
 844         obj = NULL;
 845         result = ns_config_get(maps, "cleaning-interval", &obj);
 846         INSIST(result == ISC_R_SUCCESS);
 847         dns_cache_setcleaninginterval(cache, cfg_obj_asuint32(obj) * 60);
 848
 849         obj = NULL;
 850         result = ns_config_get(maps, "max-cache-size", &obj);
 851         INSIST(result == ISC_R_SUCCESS);
 852         if (cfg_obj_isstring(obj)) {
 853                 str = cfg_obj_asstring(obj);
 854                 INSIST(strcasecmp(str, "unlimited") == 0);
 855                 max_cache_size = ISC_UINT32_MAX;
 856         } else {
 857                 isc_resourcevalue_t value;
 858                 value = cfg_obj_asuint64(obj);
 859                 if (value > ISC_UINT32_MAX) {
 860                         cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR,
 861                                     "'max-cache-size "
 862                                     "%" ISC_PRINT_QUADFORMAT "d' is too large",
 863                                     value);
 864                         result = ISC_R_RANGE;
 865                         goto cleanup;
 866                 }
 867                 max_cache_size = (isc_uint32_t)value;
 868         }
 869         dns_cache_setcachesize(cache, max_cache_size);
 870
 871         dns_cache_detach(&cache);
 872
 873         /*
 874          * Check-names.
 875          */
 876         obj = NULL;
 877         result = ns_checknames_get(maps, "response", &obj);
 878         INSIST(result == ISC_R_SUCCESS);
 879
 880         str = cfg_obj_asstring(obj);
 881         if (strcasecmp(str, "fail") == 0) {
 882                 check = DNS_RESOLVER_CHECKNAMES |
 883                         DNS_RESOLVER_CHECKNAMESFAIL;
 884                 view->checknames = ISC_TRUE;
 885         } else if (strcasecmp(str, "warn") == 0) {
 886                 check = DNS_RESOLVER_CHECKNAMES;
 887                 view->checknames = ISC_FALSE;
 888         } else if (strcasecmp(str, "ignore") == 0) {
 889                 check = 0;
 890                 view->checknames = ISC_FALSE;
 891         } else
 892                 INSIST(0);
 893
 894         /*
 895          * Resolver.
 896          *
 897          * XXXRTH  Hardwired number of tasks.
 898          */
 899         CHECK(get_view_querysource_dispatch(maps, AF_INET, &dispatch4));
 900         CHECK(get_view_querysource_dispatch(maps, AF_INET6, &dispatch6));
 901         if (dispatch4 == NULL && dispatch6 == NULL) {
 902                 UNEXPECTED_ERROR(__FILE__, __LINE__,
 903                                  "unable to obtain neither an IPv4 nor"
 904                                  " an IPv6 dispatch");
 905                 result = ISC_R_UNEXPECTED;
 906                 goto cleanup;
 907         }
 908         CHECK(dns_view_createresolver(view, ns_g_taskmgr, 31,
 909                                       ns_g_socketmgr, ns_g_timermgr,
 910                                       check, ns_g_dispatchmgr,
 911                                       dispatch4, dispatch6));
 912
 913         /*
 914          * Set the ADB cache size to 1/8th of the max-cache-size.
 915          */
 916         max_adb_size = 0;
 917         if (max_cache_size != 0) {
 918                 max_adb_size = max_cache_size / 8;
 919                 if (max_adb_size == 0)
 920                         max_adb_size = 1;       /* Force minimum. */
 921         }
 922         dns_adb_setadbsize(view->adb, max_adb_size);
 923
 924         /*
 925          * Set resolver's lame-ttl.
 926          */
 927         obj = NULL;
 928         result = ns_config_get(maps, "lame-ttl", &obj);
 929         INSIST(result == ISC_R_SUCCESS);
 930         lame_ttl = cfg_obj_asuint32(obj);
 931         if (lame_ttl > 1800)
 932                 lame_ttl = 1800;
 933         dns_resolver_setlamettl(view->resolver, lame_ttl);
 934
 935         /*
 936          * Set the resolver's EDNS UDP size.
 937          */
 938         obj = NULL;
 939         result = ns_config_get(maps, "edns-udp-size", &obj);
 940         INSIST(result == ISC_R_SUCCESS);
 941         udpsize = cfg_obj_asuint32(obj);
 942         if (udpsize < 512)
 943                 udpsize = 512;
 944         if (udpsize > 4096)
 945                 udpsize = 4096;
 946         dns_resolver_setudpsize(view->resolver, (isc_uint16_t)udpsize);
 947
 948         /*
 949          * Set supported DNSSEC algorithms.
 950          */
 951         dns_resolver_reset_algorithms(view->resolver);
 952         disabled = NULL;
 953         (void)ns_config_get(maps, "disable-algorithms", &disabled);
 954         if (disabled != NULL) {
 955                 for (element = cfg_list_first(disabled);
 956                      element != NULL;
 957                      element = cfg_list_next(element))
 958                         CHECK(disable_algorithms(cfg_listelt_value(element),
 959                                                  view->resolver));
 960         }
 961
 962         /*
 963          * A global or view "forwarders" option, if present,
 964          * creates an entry for "." in the forwarding table.
 965          */
 966         forwardtype = NULL;
 967         forwarders = NULL;
 968         (void)ns_config_get(maps, "forward", &forwardtype);
 969         (void)ns_config_get(maps, "forwarders", &forwarders);
 970         if (forwarders != NULL)
 971                 CHECK(configure_forward(config, view, dns_rootname,
 972                                         forwarders, forwardtype));
 973
 974         /*
 975          * Dual Stack Servers.
 976          */
 977         alternates = NULL;
 978         (void)ns_config_get(maps, "dual-stack-servers", &alternates);
 979         if (alternates != NULL)
 980                 CHECK(configure_alternates(config, view, alternates));
 981
 982         /*
 983          * We have default hints for class IN if we need them.
 984          */
 985         if (view->rdclass == dns_rdataclass_in && view->hints == NULL)
 986                 dns_view_sethints(view, ns_g_server->in_roothints);
 987
 988         /*
 989          * If we still have no hints, this is a non-IN view with no
 990          * "hints zone" configured.  Issue a warning, except if this
 991          * is a root server.  Root servers never need to consult
 992          * their hints, so it's no point requiring users to configure
 993          * them.
 994          */
 995         if (view->hints == NULL) {
 996                 dns_zone_t *rootzone = NULL;
 997                 (void)dns_view_findzone(view, dns_rootname, &rootzone);
 998                 if (rootzone != NULL) {
 999                         dns_zone_detach(&rootzone);
1000                         need_hints = ISC_FALSE;
1001                 }
1002                 if (need_hints)
1003                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1004                                       NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
1005                                       "no root hints for view '%s'",
1006                                       view->name);
1007         }
1008
1009         /*
1010          * Configure the view's TSIG keys.
1011          */
1012         ring = NULL;
1013         CHECK(ns_tsigkeyring_fromconfig(config, vconfig, view->mctx, &ring));
1014         dns_view_setkeyring(view, ring);
1015
1016         /*
1017          * Configure the view's peer list.
1018          */
1019         {
1020                 const cfg_obj_t *peers = NULL;
1021                 const cfg_listelt_t *element;
1022                 dns_peerlist_t *newpeers = NULL;
1023
1024                 (void)ns_config_get(cfgmaps, "server", &peers);
1025                 CHECK(dns_peerlist_new(mctx, &newpeers));
1026                 for (element = cfg_list_first(peers);
1027                      element != NULL;
1028                      element = cfg_list_next(element))
1029                 {
1030                         const cfg_obj_t *cpeer = cfg_listelt_value(element);
1031                         dns_peer_t *peer;
1032
1033                         CHECK(configure_peer(cpeer, mctx, &peer));
1034                         dns_peerlist_addpeer(newpeers, peer);
1035                         dns_peer_detach(&peer);
1036                 }
1037                 dns_peerlist_detach(&view->peers);
1038                 view->peers = newpeers; /* Transfer ownership. */
1039         }
1040
1041         /*
1042          *      Configure the views rrset-order.
1043          */
1044         {
1045                 const cfg_obj_t *rrsetorder = NULL;
1046                 const cfg_listelt_t *element;
1047
1048                 (void)ns_config_get(maps, "rrset-order", &rrsetorder);
1049                 CHECK(dns_order_create(mctx, &order));
1050                 for (element = cfg_list_first(rrsetorder);
1051                      element != NULL;
1052                      element = cfg_list_next(element))
1053                 {
1054                         const cfg_obj_t *ent = cfg_listelt_value(element);
1055
1056                         CHECK(configure_order(order, ent));
1057                 }
1058                 if (view->order != NULL)
1059                         dns_order_detach(&view->order);
1060                 dns_order_attach(order, &view->order);
1061                 dns_order_detach(&order);
1062         }
1063         /*
1064          * Copy the aclenv object.
1065          */
1066         dns_aclenv_copy(&view->aclenv, &ns_g_server->aclenv);
1067
1068         /*
1069          * Configure the "match-clients" and "match-destinations" ACL.
1070          */
1071         CHECK(configure_view_acl(vconfig, config, "match-clients", actx,
1072                                  ns_g_mctx, &view->matchclients));
1073         CHECK(configure_view_acl(vconfig, config, "match-destinations", actx,
1074                                  ns_g_mctx, &view->matchdestinations));
1075
1076         /*
1077          * Configure the "match-recursive-only" option.
1078          */
1079         obj = NULL;
1080         (void)ns_config_get(maps, "match-recursive-only", &obj);
1081         if (obj != NULL && cfg_obj_asboolean(obj))
1082                 view->matchrecursiveonly = ISC_TRUE;
1083         else
1084                 view->matchrecursiveonly = ISC_FALSE;
1085
1086         /*
1087          * Configure other configurable data.
1088          */
1089         obj = NULL;
1090         result = ns_config_get(maps, "recursion", &obj);
1091         INSIST(result == ISC_R_SUCCESS);
1092         view->recursion = cfg_obj_asboolean(obj);
1093
1094         obj = NULL;
1095         result = ns_config_get(maps, "auth-nxdomain", &obj);
1096         INSIST(result == ISC_R_SUCCESS);
1097         view->auth_nxdomain = cfg_obj_asboolean(obj);
1098
1099         obj = NULL;
1100         result = ns_config_get(maps, "minimal-responses", &obj);
1101         INSIST(result == ISC_R_SUCCESS);
1102         view->minimalresponses = cfg_obj_asboolean(obj);
1103
1104         obj = NULL;
1105         result = ns_config_get(maps, "transfer-format", &obj);
1106         INSIST(result == ISC_R_SUCCESS);
1107         str = cfg_obj_asstring(obj);
1108         if (strcasecmp(str, "many-answers") == 0)
1109                 view->transfer_format = dns_many_answers;
1110         else if (strcasecmp(str, "one-answer") == 0)
1111                 view->transfer_format = dns_one_answer;
1112         else
1113                 INSIST(0);
1114
1115         /*
1116          * Set sources where additional data and CNAME/DNAME
1117          * targets for authoritative answers may be found.
1118          */
1119         obj = NULL;
1120         result = ns_config_get(maps, "additional-from-auth", &obj);
1121         INSIST(result == ISC_R_SUCCESS);
1122         view->additionalfromauth = cfg_obj_asboolean(obj);
1123         if (view->recursion && ! view->additionalfromauth) {
1124                 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_WARNING,
1125                             "'additional-from-auth no' is only supported "
1126                             "with 'recursion no'");
1127                 view->additionalfromauth = ISC_TRUE;
1128         }
1129
1130         obj = NULL;
1131         result = ns_config_get(maps, "additional-from-cache", &obj);
1132         INSIST(result == ISC_R_SUCCESS);
1133         view->additionalfromcache = cfg_obj_asboolean(obj);
1134         if (view->recursion && ! view->additionalfromcache) {
1135                 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_WARNING,
1136                             "'additional-from-cache no' is only supported "
1137                             "with 'recursion no'");
1138                 view->additionalfromcache = ISC_TRUE;
1139         }
1140
1141         CHECK(configure_view_acl(vconfig, config, "allow-query",
1142                                  actx, ns_g_mctx, &view->queryacl));
1143
1144         if (strcmp(view->name, "_bind") != 0)
1145                 CHECK(configure_view_acl(vconfig, config, "allow-recursion",
1146                                          actx, ns_g_mctx, &view->recursionacl));
1147
1148         /*
1149          * Warning if both "recursion no;" and allow-recursion are active
1150          * except for "allow-recursion { none; };".
1151          */
1152         if (!view->recursion && view->recursionacl != NULL &&
1153             (view->recursionacl->length != 1 ||
1154              view->recursionacl->elements[0].type != dns_aclelementtype_any ||
1155              view->recursionacl->elements[0].negative != ISC_TRUE)) {
1156                 const char *forview = " for view ";
1157                 const char *viewname = view->name;
1158
1159                 if (!strcmp(view->name, "_bind") ||
1160                     !strcmp(view->name, "_default")) {
1161                         forview = "";
1162                         viewname = "";
1163                 }
1164                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1165                               NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
1166                               "both \"recursion no;\" and \"allow-recursion\" "
1167                               "active%s%s", forview, viewname);
1168         }
1169
1170         CHECK(configure_view_acl(vconfig, config, "sortlist",
1171                                  actx, ns_g_mctx, &view->sortlist));
1172
1173         obj = NULL;
1174         result = ns_config_get(maps, "request-ixfr", &obj);
1175         INSIST(result == ISC_R_SUCCESS);
1176         view->requestixfr = cfg_obj_asboolean(obj);
1177
1178         obj = NULL;
1179         result = ns_config_get(maps, "provide-ixfr", &obj);
1180         INSIST(result == ISC_R_SUCCESS);
1181         view->provideixfr = cfg_obj_asboolean(obj);
1182
1183         obj = NULL;
1184         result = ns_config_get(maps, "dnssec-enable", &obj);
1185         INSIST(result == ISC_R_SUCCESS);
1186         view->enablednssec = cfg_obj_asboolean(obj);
1187
1188         obj = NULL;
1189         result = ns_config_get(maps, "dnssec-lookaside", &obj);
1190         if (result == ISC_R_SUCCESS) {
1191                 for (element = cfg_list_first(obj);
1192                      element != NULL;
1193                      element = cfg_list_next(element))
1194                 {
1195                         const char *str;
1196                         isc_buffer_t b;
1197                         dns_name_t *dlv;
1198
1199                         obj = cfg_listelt_value(element);
1200 #if 0
1201                         dns_fixedname_t fixed;
1202                         dns_name_t *name;
1203
1204                         /*
1205                          * When we support multiple dnssec-lookaside
1206                          * entries this is how to find the domain to be
1207                          * checked. XXXMPA
1208                          */
1209                         dns_fixedname_init(&fixed);
1210                         name = dns_fixedname_name(&fixed);
1211                         str = cfg_obj_asstring(cfg_tuple_get(obj,
1212                                                              "domain"));
1213                         isc_buffer_init(&b, str, strlen(str));
1214                         isc_buffer_add(&b, strlen(str));
1215                         CHECK(dns_name_fromtext(name, &b, dns_rootname,
1216                                                 ISC_TRUE, NULL));
1217 #endif
1218                         str = cfg_obj_asstring(cfg_tuple_get(obj,
1219                                                              "trust-anchor"));
1220                         isc_buffer_init(&b, str, strlen(str));
1221                         isc_buffer_add(&b, strlen(str));
1222                         dlv = dns_fixedname_name(&view->dlv_fixed);
1223                         CHECK(dns_name_fromtext(dlv, &b, dns_rootname,
1224                                                 ISC_TRUE, NULL));
1225                         view->dlv = dns_fixedname_name(&view->dlv_fixed);
1226                 }
1227         } else
1228                 view->dlv = NULL;
1229
1230         /*
1231          * For now, there is only one kind of trusted keys, the
1232          * "security roots".
1233          */
1234         if (view->enablednssec) {
1235                 CHECK(configure_view_dnsseckeys(vconfig, config, mctx,
1236                                                 &view->secroots));
1237                 dns_resolver_resetmustbesecure(view->resolver);
1238                 obj = NULL;
1239                 result = ns_config_get(maps, "dnssec-must-be-secure", &obj);
1240                 if (result == ISC_R_SUCCESS)
1241                         CHECK(mustbesecure(obj, view->resolver));
1242         }
1243
1244         obj = NULL;
1245         result = ns_config_get(maps, "max-cache-ttl", &obj);
1246         INSIST(result == ISC_R_SUCCESS);
1247         view->maxcachettl = cfg_obj_asuint32(obj);
1248
1249         obj = NULL;
1250         result = ns_config_get(maps, "max-ncache-ttl", &obj);
1251         INSIST(result == ISC_R_SUCCESS);
1252         view->maxncachettl = cfg_obj_asuint32(obj);
1253         if (view->maxncachettl > 7 * 24 * 3600)
1254                 view->maxncachettl = 7 * 24 * 3600;
1255
1256         obj = NULL;
1257         result = ns_config_get(maps, "preferred-glue", &obj);
1258         if (result == ISC_R_SUCCESS) {
1259                 str = cfg_obj_asstring(obj);
1260                 if (strcasecmp(str, "a") == 0)
1261                         view->preferred_glue = dns_rdatatype_a;
1262                 else if (strcasecmp(str, "aaaa") == 0)
1263                         view->preferred_glue = dns_rdatatype_aaaa;
1264                 else
1265                         view->preferred_glue = 0;
1266         } else
1267                 view->preferred_glue = 0;
1268
1269         obj = NULL;
1270         result = ns_config_get(maps, "root-delegation-only", &obj);
1271         if (result == ISC_R_SUCCESS) {
1272                 dns_view_setrootdelonly(view, ISC_TRUE);
1273                 if (!cfg_obj_isvoid(obj)) {
1274                         dns_fixedname_t fixed;
1275                         dns_name_t *name;
1276                         isc_buffer_t b;
1277                         const char *str;
1278                         const cfg_obj_t *exclude;
1279
1280                         dns_fixedname_init(&fixed);
1281                         name = dns_fixedname_name(&fixed);
1282                         for (element = cfg_list_first(obj);
1283                              element != NULL;
1284                              element = cfg_list_next(element)) {
1285                                 exclude = cfg_listelt_value(element);
1286                                 str = cfg_obj_asstring(exclude);
1287                                 isc_buffer_init(&b, str, strlen(str));
1288                                 isc_buffer_add(&b, strlen(str));
1289                                 CHECK(dns_name_fromtext(name, &b, dns_rootname,
1290                                                         ISC_FALSE, NULL));
1291                                 CHECK(dns_view_excludedelegationonly(view,
1292                                                                      name));
1293                         }
1294                 }
1295         } else
1296                 dns_view_setrootdelonly(view, ISC_FALSE);
1297
1298         result = ISC_R_SUCCESS;
1299
1300  cleanup:
1301         if (dispatch4 != NULL)
1302                 dns_dispatch_detach(&dispatch4);
1303         if (dispatch6 != NULL)
1304                 dns_dispatch_detach(&dispatch6);
1305         if (order != NULL)
1306                 dns_order_detach(&order);
1307         if (cmctx != NULL)
1308                 isc_mem_detach(&cmctx);
1309
1310         if (cache != NULL)
1311                 dns_cache_detach(&cache);
1312
1313         return (result);
1314 }
1315
1316 static isc_result_t
1317 configure_hints(dns_view_t *view, const char *filename) {
1318         isc_result_t result;
1319         dns_db_t *db;
1320
1321         db = NULL;
1322         result = dns_rootns_create(view->mctx, view->rdclass, filename, &db);
1323         if (result == ISC_R_SUCCESS) {
1324                 dns_view_sethints(view, db);
1325                 dns_db_detach(&db);
1326         }
1327
1328         return (result);
1329 }
1330
1331 static isc_result_t
1332 configure_alternates(const cfg_obj_t *config, dns_view_t *view,
1333                      const cfg_obj_t *alternates)
1334 {
1335         const cfg_obj_t *portobj;
1336         const cfg_obj_t *addresses;
1337         const cfg_listelt_t *element;
1338         isc_result_t result = ISC_R_SUCCESS;
1339         in_port_t port;
1340
1341         /*
1342          * Determine which port to send requests to.
1343          */
1344         if (ns_g_lwresdonly && ns_g_port != 0)
1345                 port = ns_g_port;
1346         else
1347                 CHECKM(ns_config_getport(config, &port), "port");
1348
1349         if (alternates != NULL) {
1350                 portobj = cfg_tuple_get(alternates, "port");
1351                 if (cfg_obj_isuint32(portobj)) {
1352                         isc_uint32_t val = cfg_obj_asuint32(portobj);
1353                         if (val > ISC_UINT16_MAX) {
1354                                 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
1355                                             "port '%u' out of range", val);
1356                                 return (ISC_R_RANGE);
1357                         }
1358                         port = (in_port_t) val;
1359                 }
1360         }
1361
1362         addresses = NULL;
1363         if (alternates != NULL)
1364                 addresses = cfg_tuple_get(alternates, "addresses");
1365
1366         for (element = cfg_list_first(addresses);
1367              element != NULL;
1368              element = cfg_list_next(element))
1369         {
1370                 const cfg_obj_t *alternate = cfg_listelt_value(element);
1371                 isc_sockaddr_t sa;
1372
1373                 if (!cfg_obj_issockaddr(alternate)) {
1374                         dns_fixedname_t fixed;
1375                         dns_name_t *name;
1376                         const char *str = cfg_obj_asstring(cfg_tuple_get(
1377                                                            alternate, "name"));
1378                         isc_buffer_t buffer;
1379                         in_port_t myport = port;
1380
1381                         isc_buffer_init(&buffer, str, strlen(str));
1382                         isc_buffer_add(&buffer, strlen(str));
1383                         dns_fixedname_init(&fixed);
1384                         name = dns_fixedname_name(&fixed);
1385                         CHECK(dns_name_fromtext(name, &buffer, dns_rootname,
1386                                                 ISC_FALSE, NULL));
1387
1388                         portobj = cfg_tuple_get(alternate, "port");
1389                         if (cfg_obj_isuint32(portobj)) {
1390                                 isc_uint32_t val = cfg_obj_asuint32(portobj);
1391                                 if (val > ISC_UINT16_MAX) {
1392                                         cfg_obj_log(portobj, ns_g_lctx,
1393                                                     ISC_LOG_ERROR,
1394                                                     "port '%u' out of range",
1395                                                      val);
1396                                         return (ISC_R_RANGE);
1397                                 }
1398                                 myport = (in_port_t) val;
1399                         }
1400                         CHECK(dns_resolver_addalternate(view->resolver, NULL,
1401                                                         name, myport));
1402                         continue;
1403                 }
1404
1405                 sa = *cfg_obj_assockaddr(alternate);
1406                 if (isc_sockaddr_getport(&sa) == 0)
1407                         isc_sockaddr_setport(&sa, port);
1408                 CHECK(dns_resolver_addalternate(view->resolver, &sa,
1409                                                 NULL, 0));
1410         }
1411
1412  cleanup:
1413         return (result);
1414 }
1415
1416 static isc_result_t
1417 configure_forward(const cfg_obj_t *config, dns_view_t *view, dns_name_t *origin,
1418                   const cfg_obj_t *forwarders, const cfg_obj_t *forwardtype)
1419 {
1420         const cfg_obj_t *portobj;
1421         const cfg_obj_t *faddresses;
1422         const cfg_listelt_t *element;
1423         dns_fwdpolicy_t fwdpolicy = dns_fwdpolicy_none;
1424         isc_sockaddrlist_t addresses;
1425         isc_sockaddr_t *sa;
1426         isc_result_t result;
1427         in_port_t port;
1428
1429         /*
1430          * Determine which port to send forwarded requests to.
1431          */
1432         if (ns_g_lwresdonly && ns_g_port != 0)
1433                 port = ns_g_port;
1434         else
1435                 CHECKM(ns_config_getport(config, &port), "port");
1436
1437         if (forwarders != NULL) {
1438                 portobj = cfg_tuple_get(forwarders, "port");
1439                 if (cfg_obj_isuint32(portobj)) {
1440                         isc_uint32_t val = cfg_obj_asuint32(portobj);
1441                         if (val > ISC_UINT16_MAX) {
1442                                 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
1443                                             "port '%u' out of range", val);
1444                                 return (ISC_R_RANGE);
1445                         }
1446                         port = (in_port_t) val;
1447                 }
1448         }
1449
1450         faddresses = NULL;
1451         if (forwarders != NULL)
1452                 faddresses = cfg_tuple_get(forwarders, "addresses");
1453
1454         ISC_LIST_INIT(addresses);
1455
1456         for (element = cfg_list_first(faddresses);
1457              element != NULL;
1458              element = cfg_list_next(element))
1459         {
1460                 const cfg_obj_t *forwarder = cfg_listelt_value(element);
1461                 sa = isc_mem_get(view->mctx, sizeof(isc_sockaddr_t));
1462                 if (sa == NULL) {
1463                         result = ISC_R_NOMEMORY;
1464                         goto cleanup;
1465                 }
1466                 *sa = *cfg_obj_assockaddr(forwarder);
1467                 if (isc_sockaddr_getport(sa) == 0)
1468                         isc_sockaddr_setport(sa, port);
1469                 ISC_LINK_INIT(sa, link);
1470                 ISC_LIST_APPEND(addresses, sa, link);
1471         }
1472
1473         if (ISC_LIST_EMPTY(addresses)) {
1474                 if (forwardtype != NULL)
1475                         cfg_obj_log(forwarders, ns_g_lctx, ISC_LOG_WARNING,
1476                                     "no forwarders seen; disabling "
1477                                     "forwarding");
1478                 fwdpolicy = dns_fwdpolicy_none;
1479         } else {
1480                 if (forwardtype == NULL)
1481                         fwdpolicy = dns_fwdpolicy_first;
1482                 else {
1483                         const char *forwardstr = cfg_obj_asstring(forwardtype);
1484                         if (strcasecmp(forwardstr, "first") == 0)
1485                                 fwdpolicy = dns_fwdpolicy_first;
1486                         else if (strcasecmp(forwardstr, "only") == 0)
1487                                 fwdpolicy = dns_fwdpolicy_only;
1488                         else
1489                                 INSIST(0);
1490                 }
1491         }
1492
1493         result = dns_fwdtable_add(view->fwdtable, origin, &addresses,
1494                                   fwdpolicy);
1495         if (result != ISC_R_SUCCESS) {
1496                 char namebuf[DNS_NAME_FORMATSIZE];
1497                 dns_name_format(origin, namebuf, sizeof(namebuf));
1498                 cfg_obj_log(forwarders, ns_g_lctx, ISC_LOG_WARNING,
1499                             "could not set up forwarding for domain '%s': %s",
1500                             namebuf, isc_result_totext(result));
1501                 goto cleanup;
1502         }
1503
1504         result = ISC_R_SUCCESS;
1505
1506  cleanup:
1507
1508         while (!ISC_LIST_EMPTY(addresses)) {
1509                 sa = ISC_LIST_HEAD(addresses);
1510                 ISC_LIST_UNLINK(addresses, sa, link);
1511                 isc_mem_put(view->mctx, sa, sizeof(isc_sockaddr_t));
1512         }
1513
1514         return (result);
1515 }
1516
1517 /*
1518  * Create a new view and add it to the list.
1519  *
1520  * If 'vconfig' is NULL, create the default view.
1521  *
1522  * The view created is attached to '*viewp'.
1523  */
1524 static isc_result_t
1525 create_view(const cfg_obj_t *vconfig, dns_viewlist_t *viewlist,
1526             dns_view_t **viewp)
1527 {
1528         isc_result_t result;
1529         const char *viewname;
1530         dns_rdataclass_t viewclass;
1531         dns_view_t *view = NULL;
1532
1533         if (vconfig != NULL) {
1534                 const cfg_obj_t *classobj = NULL;
1535
1536                 viewname = cfg_obj_asstring(cfg_tuple_get(vconfig, "name"));
1537                 classobj = cfg_tuple_get(vconfig, "class");
1538                 result = ns_config_getclass(classobj, dns_rdataclass_in,
1539                                             &viewclass);
1540         } else {
1541                 viewname = "_default";
1542                 viewclass = dns_rdataclass_in;
1543         }
1544         result = dns_viewlist_find(viewlist, viewname, viewclass, &view);
1545         if (result == ISC_R_SUCCESS)
1546                 return (ISC_R_EXISTS);
1547         if (result != ISC_R_NOTFOUND)
1548                 return (result);
1549         INSIST(view == NULL);
1550
1551         result = dns_view_create(ns_g_mctx, viewclass, viewname, &view);
1552         if (result != ISC_R_SUCCESS)
1553                 return (result);
1554
1555         ISC_LIST_APPEND(*viewlist, view, link);
1556         dns_view_attach(view, viewp);
1557         return (ISC_R_SUCCESS);
1558 }
1559
1560 /*
1561  * Configure or reconfigure a zone.
1562  */
1563 static isc_result_t
1564 configure_zone(const cfg_obj_t *config, const cfg_obj_t *zconfig,
1565                const cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
1566                ns_aclconfctx_t *aclconf)
1567 {
1568         dns_view_t *pview = NULL;       /* Production view */
1569         dns_zone_t *zone = NULL;        /* New or reused zone */
1570         dns_zone_t *dupzone = NULL;
1571         const cfg_obj_t *options = NULL;
1572         const cfg_obj_t *zoptions = NULL;
1573         const cfg_obj_t *typeobj = NULL;
1574         const cfg_obj_t *forwarders = NULL;
1575         const cfg_obj_t *forwardtype = NULL;
1576         const cfg_obj_t *only = NULL;
1577         isc_result_t result;
1578         isc_result_t tresult;
1579         isc_buffer_t buffer;
1580         dns_fixedname_t fixorigin;
1581         dns_name_t *origin;
1582         const char *zname;
1583         dns_rdataclass_t zclass;
1584         const char *ztypestr;
1585
1586         options = NULL;
1587         (void)cfg_map_get(config, "options", &options);
1588
1589         zoptions = cfg_tuple_get(zconfig, "options");
1590
1591         /*
1592          * Get the zone origin as a dns_name_t.
1593          */
1594         zname = cfg_obj_asstring(cfg_tuple_get(zconfig, "name"));
1595         isc_buffer_init(&buffer, zname, strlen(zname));
1596         isc_buffer_add(&buffer, strlen(zname));
1597         dns_fixedname_init(&fixorigin);
1598         CHECK(dns_name_fromtext(dns_fixedname_name(&fixorigin),
1599                                 &buffer, dns_rootname, ISC_FALSE, NULL));
1600         origin = dns_fixedname_name(&fixorigin);
1601
1602         CHECK(ns_config_getclass(cfg_tuple_get(zconfig, "class"),
1603                                  view->rdclass, &zclass));
1604         if (zclass != view->rdclass) {
1605                 const char *vname = NULL;
1606                 if (vconfig != NULL)
1607                         vname = cfg_obj_asstring(cfg_tuple_get(vconfig,
1608                                                                "name"));
1609                 else
1610                         vname = "<default view>";
1611
1612                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1613                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
1614                               "zone '%s': wrong class for view '%s'",
1615                               zname, vname);
1616                 result = ISC_R_FAILURE;
1617                 goto cleanup;
1618         }
1619
1620         (void)cfg_map_get(zoptions, "type", &typeobj);
1621         if (typeobj == NULL) {
1622                 cfg_obj_log(zconfig, ns_g_lctx, ISC_LOG_ERROR,
1623                             "zone '%s' 'type' not specified", zname);
1624                 return (ISC_R_FAILURE);
1625         }
1626         ztypestr = cfg_obj_asstring(typeobj);
1627
1628         /*
1629          * "hints zones" aren't zones.  If we've got one,
1630          * configure it and return.
1631          */
1632         if (strcasecmp(ztypestr, "hint") == 0) {
1633                 const cfg_obj_t *fileobj = NULL;
1634                 if (cfg_map_get(zoptions, "file", &fileobj) != ISC_R_SUCCESS) {
1635                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1636                                       NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
1637                                       "zone '%s': 'file' not specified",
1638                                       zname);
1639                         result = ISC_R_FAILURE;
1640                         goto cleanup;
1641                 }
1642                 if (dns_name_equal(origin, dns_rootname)) {
1643                         const char *hintsfile = cfg_obj_asstring(fileobj);
1644
1645                         result = configure_hints(view, hintsfile);
1646                         if (result != ISC_R_SUCCESS) {
1647                                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1648                                               NS_LOGMODULE_SERVER,
1649                                               ISC_LOG_ERROR,
1650                                               "could not configure root hints "
1651                                               "from '%s': %s", hintsfile,
1652                                               isc_result_totext(result));
1653                                 goto cleanup;
1654                         }
1655                         /*
1656                          * Hint zones may also refer to delegation only points.
1657                          */
1658                         only = NULL;
1659                         tresult = cfg_map_get(zoptions, "delegation-only",
1660                                               &only);
1661                         if (tresult == ISC_R_SUCCESS && cfg_obj_asboolean(only))
1662                                 CHECK(dns_view_adddelegationonly(view, origin));
1663                 } else {
1664                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1665                                       NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
1666                                       "ignoring non-root hint zone '%s'",
1667                                       zname);
1668                         result = ISC_R_SUCCESS;
1669                 }
1670                 /* Skip ordinary zone processing. */
1671                 goto cleanup;
1672         }
1673
1674         /*
1675          * "forward zones" aren't zones either.  Translate this syntax into
1676          * the appropriate selective forwarding configuration and return.
1677          */
1678         if (strcasecmp(ztypestr, "forward") == 0) {
1679                 forwardtype = NULL;
1680                 forwarders = NULL;
1681
1682                 (void)cfg_map_get(zoptions, "forward", &forwardtype);
1683                 (void)cfg_map_get(zoptions, "forwarders", &forwarders);
1684                 result = configure_forward(config, view, origin, forwarders,
1685                                            forwardtype);
1686                 goto cleanup;
1687         }
1688
1689         /*
1690          * "delegation-only zones" aren't zones either.
1691          */
1692         if (strcasecmp(ztypestr, "delegation-only") == 0) {
1693                 result = dns_view_adddelegationonly(view, origin);
1694                 goto cleanup;
1695         }
1696
1697         /*
1698          * Check for duplicates in the new zone table.
1699          */
1700         result = dns_view_findzone(view, origin, &dupzone);
1701         if (result == ISC_R_SUCCESS) {
1702                 /*
1703                  * We already have this zone!
1704                  */
1705                 cfg_obj_log(zconfig, ns_g_lctx, ISC_LOG_ERROR,
1706                             "zone '%s' already exists", zname);
1707                 dns_zone_detach(&dupzone);
1708                 result = ISC_R_EXISTS;
1709                 goto cleanup;
1710         }
1711         INSIST(dupzone == NULL);
1712
1713         /*
1714          * See if we can reuse an existing zone.  This is
1715          * only possible if all of these are true:
1716          *   - The zone's view exists
1717          *   - A zone with the right name exists in the view
1718          *   - The zone is compatible with the config
1719          *     options (e.g., an existing master zone cannot
1720          *     be reused if the options specify a slave zone)
1721          */
1722         result = dns_viewlist_find(&ns_g_server->viewlist,
1723                                    view->name, view->rdclass,
1724                                    &pview);
1725         if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
1726                 goto cleanup;
1727         if (pview != NULL)
1728                 result = dns_view_findzone(pview, origin, &zone);
1729         if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
1730                 goto cleanup;
1731         if (zone != NULL) {
1732                 if (! ns_zone_reusable(zone, zconfig))
1733                         dns_zone_detach(&zone);
1734         }
1735
1736         if (zone != NULL) {
1737                 /*
1738                  * We found a reusable zone.  Make it use the
1739                  * new view.
1740                  */
1741                 dns_zone_setview(zone, view);
1742         } else {
1743                 /*
1744                  * We cannot reuse an existing zone, we have
1745                  * to create a new one.
1746                  */
1747                 CHECK(dns_zone_create(&zone, mctx));
1748                 CHECK(dns_zone_setorigin(zone, origin));
1749                 dns_zone_setview(zone, view);
1750                 CHECK(dns_zonemgr_managezone(ns_g_server->zonemgr, zone));
1751         }
1752
1753         /*
1754          * If the zone contains a 'forwarders' statement, configure
1755          * selective forwarding.
1756          */
1757         forwarders = NULL;
1758         if (cfg_map_get(zoptions, "forwarders", &forwarders) == ISC_R_SUCCESS)
1759         {
1760                 forwardtype = NULL;
1761                 (void)cfg_map_get(zoptions, "forward", &forwardtype);
1762                 CHECK(configure_forward(config, view, origin, forwarders,
1763                                         forwardtype));
1764         }
1765
1766         /*
1767          * Stub and forward zones may also refer to delegation only points.
1768          */
1769         only = NULL;
1770         if (cfg_map_get(zoptions, "delegation-only", &only) == ISC_R_SUCCESS)
1771         {
1772                 if (cfg_obj_asboolean(only))
1773                         CHECK(dns_view_adddelegationonly(view, origin));
1774         }
1775
1776         /*
1777          * Configure the zone.
1778          */
1779         CHECK(ns_zone_configure(config, vconfig, zconfig, aclconf, zone));
1780
1781         /*
1782          * Add the zone to its view in the new view list.
1783          */
1784         CHECK(dns_view_addzone(view, zone));
1785
1786  cleanup:
1787         if (zone != NULL)
1788                 dns_zone_detach(&zone);
1789         if (pview != NULL)
1790                 dns_view_detach(&pview);
1791
1792         return (result);
1793 }
1794
1795 /*
1796  * Configure a single server quota.
1797  */
1798 static void
1799 configure_server_quota(const cfg_obj_t **maps, const char *name,
1800                        isc_quota_t *quota)
1801 {
1802         const cfg_obj_t *obj = NULL;
1803         isc_result_t result;
1804
1805         result = ns_config_get(maps, name, &obj);
1806         INSIST(result == ISC_R_SUCCESS);
1807         isc_quota_max(quota, cfg_obj_asuint32(obj));
1808 }
1809
1810 /*
1811  * This function is called as soon as the 'directory' statement has been
1812  * parsed.  This can be extended to support other options if necessary.
1813  */
1814 static isc_result_t
1815 directory_callback(const char *clausename, const cfg_obj_t *obj, void *arg) {
1816         isc_result_t result;
1817         const char *directory;
1818
1819         REQUIRE(strcasecmp("directory", clausename) == 0);
1820
1821         UNUSED(arg);
1822         UNUSED(clausename);
1823
1824         /*
1825          * Change directory.
1826          */
1827         directory = cfg_obj_asstring(obj);
1828
1829         if (! isc_file_ischdiridempotent(directory))
1830                 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_WARNING,
1831                             "option 'directory' contains relative path '%s'",
1832                             directory);
1833
1834         result = isc_dir_chdir(directory);
1835         if (result != ISC_R_SUCCESS) {
1836                 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR,
1837                             "change directory to '%s' failed: %s",
1838                             directory, isc_result_totext(result));
1839                 return (result);
1840         }
1841
1842         return (ISC_R_SUCCESS);
1843 }
1844
1845 static void
1846 scan_interfaces(ns_server_t *server, isc_boolean_t verbose) {
1847         isc_boolean_t match_mapped = server->aclenv.match_mapped;
1848
1849         ns_interfacemgr_scan(server->interfacemgr, verbose);
1850         /*
1851          * Update the "localhost" and "localnets" ACLs to match the
1852          * current set of network interfaces.
1853          */
1854         dns_aclenv_copy(&server->aclenv,
1855                         ns_interfacemgr_getaclenv(server->interfacemgr));
1856
1857         server->aclenv.match_mapped = match_mapped;
1858 }
1859
1860 static isc_result_t
1861 add_listenelt(isc_mem_t *mctx, ns_listenlist_t *list, isc_sockaddr_t *addr) {
1862         ns_listenelt_t *lelt = NULL;
1863         dns_acl_t *src_acl = NULL;
1864         dns_aclelement_t aelt;
1865         isc_result_t result;
1866         isc_sockaddr_t any_sa6;
1867
1868         REQUIRE(isc_sockaddr_pf(addr) == AF_INET6);
1869
1870         isc_sockaddr_any6(&any_sa6);
1871         if (!isc_sockaddr_equal(&any_sa6, addr)) {
1872                 aelt.type = dns_aclelementtype_ipprefix;
1873                 aelt.negative = ISC_FALSE;
1874                 aelt.u.ip_prefix.prefixlen = 128;
1875                 isc_netaddr_fromin6(&aelt.u.ip_prefix.address,
1876                                     &addr->type.sin6.sin6_addr);
1877
1878                 result = dns_acl_create(mctx, 1, &src_acl);
1879                 if (result != ISC_R_SUCCESS)
1880                         return (result);
1881                 result = dns_acl_appendelement(src_acl, &aelt);
1882                 if (result != ISC_R_SUCCESS)
1883                         goto clean;
1884
1885                 result = ns_listenelt_create(mctx, isc_sockaddr_getport(addr),
1886                                              src_acl, &lelt);
1887                 if (result != ISC_R_SUCCESS)
1888                         goto clean;
1889                 ISC_LIST_APPEND(list->elts, lelt, link);
1890         }
1891
1892         return (ISC_R_SUCCESS);
1893
1894  clean:
1895         INSIST(lelt == NULL);
1896         dns_acl_detach(&src_acl);
1897
1898         return (result);
1899 }
1900
1901 /*
1902  * Make a list of xxx-source addresses and call ns_interfacemgr_adjust()
1903  * to update the listening interfaces accordingly.
1904  * We currently only consider IPv6, because this only affects IPv6 wildcard
1905  * sockets.
1906  */
1907 static void
1908 adjust_interfaces(ns_server_t *server, isc_mem_t *mctx) {
1909         isc_result_t result;
1910         ns_listenlist_t *list = NULL;
1911         dns_view_t *view;
1912         dns_zone_t *zone, *next;
1913         isc_sockaddr_t addr, *addrp;
1914
1915         result = ns_listenlist_create(mctx, &list);
1916         if (result != ISC_R_SUCCESS)
1917                 return;
1918
1919         for (view = ISC_LIST_HEAD(server->viewlist);
1920              view != NULL;
1921              view = ISC_LIST_NEXT(view, link)) {
1922                 dns_dispatch_t *dispatch6;
1923
1924                 dispatch6 = dns_resolver_dispatchv6(view->resolver);
1925                 if (dispatch6 == NULL)
1926                         continue;
1927                 result = dns_dispatch_getlocaladdress(dispatch6, &addr);
1928                 if (result != ISC_R_SUCCESS)
1929                         goto fail;
1930                 result = add_listenelt(mctx, list, &addr);
1931                 if (result != ISC_R_SUCCESS)
1932                         goto fail;
1933         }
1934
1935         zone = NULL;
1936         for (result = dns_zone_first(server->zonemgr, &zone);
1937              result == ISC_R_SUCCESS;
1938              next = NULL, result = dns_zone_next(zone, &next), zone = next) {
1939                 dns_view_t *zoneview;
1940
1941                 /*
1942                  * At this point the zone list may contain a stale zone
1943                  * just removed from the configuration.  To see the validity,
1944                  * check if the corresponding view is in our current view list.
1945                  * There may also be old zones that are still in the process
1946                  * of shutting down and have detached from their old view
1947                  * (zoneview == NULL).
1948                  */
1949                 zoneview = dns_zone_getview(zone);
1950                 if (zoneview == NULL)
1951                         continue;
1952                 for (view = ISC_LIST_HEAD(server->viewlist);
1953                      view != NULL && view != zoneview;
1954                      view = ISC_LIST_NEXT(view, link))
1955                         ;
1956                 if (view == NULL)
1957                         continue;
1958
1959                 addrp = dns_zone_getnotifysrc6(zone);
1960                 result = add_listenelt(mctx, list, addrp);
1961                 if (result != ISC_R_SUCCESS)
1962                         goto fail;
1963
1964                 addrp = dns_zone_getxfrsource6(zone);
1965                 result = add_listenelt(mctx, list, addrp);
1966                 if (result != ISC_R_SUCCESS)
1967                         goto fail;
1968         }
1969
1970         ns_interfacemgr_adjust(server->interfacemgr, list, ISC_TRUE);
1971
1972  clean:
1973         ns_listenlist_detach(&list);
1974         return;
1975
1976  fail:
1977         /*
1978          * Even when we failed the procedure, most of other interfaces
1979          * should work correctly.  We therefore just warn it.
1980          */
1981         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1982                       NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
1983                       "could not adjust the listen-on list; "
1984                       "some interfaces may not work");
1985         goto clean;
1986 }
1987
1988 /*
1989  * This event callback is invoked to do periodic network
1990  * interface scanning.
1991  */
1992 static void
1993 interface_timer_tick(isc_task_t *task, isc_event_t *event) {
1994         isc_result_t result;
1995         ns_server_t *server = (ns_server_t *) event->ev_arg;
1996         INSIST(task == server->task);
1997         UNUSED(task);
1998         isc_event_free(&event);
1999         /*
2000          * XXX should scan interfaces unlocked and get exclusive access
2001          * only to replace ACLs.
2002          */
2003         result = isc_task_beginexclusive(server->task);
2004         RUNTIME_CHECK(result == ISC_R_SUCCESS);
2005         scan_interfaces(server, ISC_FALSE);
2006         isc_task_endexclusive(server->task);
2007 }
2008
2009 static void
2010 heartbeat_timer_tick(isc_task_t *task, isc_event_t *event) {
2011         ns_server_t *server = (ns_server_t *) event->ev_arg;
2012         dns_view_t *view;
2013
2014         UNUSED(task);
2015         isc_event_free(&event);
2016         view = ISC_LIST_HEAD(server->viewlist);
2017         while (view != NULL) {
2018                 dns_view_dialup(view);
2019                 view = ISC_LIST_NEXT(view, link);
2020         }
2021 }
2022
2023 /*
2024  * Replace the current value of '*field', a dynamically allocated
2025  * string or NULL, with a dynamically allocated copy of the
2026  * null-terminated string pointed to by 'value', or NULL.
2027  */
2028 static isc_result_t
2029 setstring(ns_server_t *server, char **field, const char *value) {
2030         char *copy;
2031
2032         if (value != NULL) {
2033                 copy = isc_mem_strdup(server->mctx, value);
2034                 if (copy == NULL)
2035                         return (ISC_R_NOMEMORY);
2036         } else {
2037                 copy = NULL;
2038         }
2039
2040         if (*field != NULL)
2041                 isc_mem_free(server->mctx, *field);
2042
2043         *field = copy;
2044         return (ISC_R_SUCCESS);
2045 }
2046
2047 /*
2048  * Replace the current value of '*field', a dynamically allocated
2049  * string or NULL, with another dynamically allocated string
2050  * or NULL if whether 'obj' is a string or void value, respectively.
2051  */
2052 static isc_result_t
2053 setoptstring(ns_server_t *server, char **field, const cfg_obj_t *obj) {
2054         if (cfg_obj_isvoid(obj))
2055                 return (setstring(server, field, NULL));
2056         else
2057                 return (setstring(server, field, cfg_obj_asstring(obj)));
2058 }
2059
2060 static void
2061 set_limit(const cfg_obj_t **maps, const char *configname,
2062           const char *description, isc_resource_t resourceid,
2063           isc_resourcevalue_t defaultvalue)
2064 {
2065         const cfg_obj_t *obj = NULL;
2066         const char *resource;
2067         isc_resourcevalue_t value;
2068         isc_result_t result;
2069
2070         if (ns_config_get(maps, configname, &obj) != ISC_R_SUCCESS)
2071                 return;
2072
2073         if (cfg_obj_isstring(obj)) {
2074                 resource = cfg_obj_asstring(obj);
2075                 if (strcasecmp(resource, "unlimited") == 0)
2076                         value = ISC_RESOURCE_UNLIMITED;
2077                 else {
2078                         INSIST(strcasecmp(resource, "default") == 0);
2079                         value = defaultvalue;
2080                 }
2081         } else
2082                 value = cfg_obj_asuint64(obj);
2083
2084         result = isc_resource_setlimit(resourceid, value);
2085         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
2086                       result == ISC_R_SUCCESS ?
2087                         ISC_LOG_DEBUG(3) : ISC_LOG_WARNING,
2088                       "set maximum %s to %" ISC_PRINT_QUADFORMAT "d: %s",
2089                       description, value, isc_result_totext(result));
2090 }
2091
2092 #define SETLIMIT(cfgvar, resource, description) \
2093         set_limit(maps, cfgvar, description, isc_resource_ ## resource, \
2094                   ns_g_init ## resource)
2095
2096 static void
2097 set_limits(const cfg_obj_t **maps) {
2098         SETLIMIT("stacksize", stacksize, "stack size");
2099         SETLIMIT("datasize", datasize, "data size");
2100         SETLIMIT("coresize", coresize, "core size");
2101         SETLIMIT("files", openfiles, "open files");
2102 }
2103
2104 static isc_result_t
2105 portlist_fromconf(dns_portlist_t *portlist, unsigned int family,
2106                   const cfg_obj_t *ports)
2107 {
2108         const cfg_listelt_t *element;
2109         isc_result_t result = ISC_R_SUCCESS;
2110
2111         for (element = cfg_list_first(ports);
2112              element != NULL;
2113              element = cfg_list_next(element)) {
2114                 const cfg_obj_t *obj = cfg_listelt_value(element);
2115                 in_port_t port = (in_port_t)cfg_obj_asuint32(obj);
2116
2117                 result = dns_portlist_add(portlist, family, port);
2118                 if (result != ISC_R_SUCCESS)
2119                         break;
2120         }
2121         return (result);
2122 }
2123
2124 static isc_result_t
2125 load_configuration(const char *filename, ns_server_t *server,
2126                    isc_boolean_t first_time)
2127 {
2128         isc_result_t result;
2129         cfg_parser_t *parser = NULL;
2130         cfg_obj_t *config;
2131         const cfg_obj_t *options;
2132         const cfg_obj_t *views;
2133         const cfg_obj_t *obj;
2134         const cfg_obj_t *v4ports, *v6ports;
2135         const cfg_obj_t *maps[3];
2136         const cfg_obj_t *builtin_views;
2137         const cfg_listelt_t *element;
2138         dns_view_t *view = NULL;
2139         dns_view_t *view_next;
2140         dns_viewlist_t viewlist;
2141         dns_viewlist_t tmpviewlist;
2142         ns_aclconfctx_t aclconfctx;
2143         isc_uint32_t interface_interval;
2144         isc_uint32_t heartbeat_interval;
2145         isc_uint32_t udpsize;
2146         in_port_t listen_port;
2147         int i;
2148
2149         ns_aclconfctx_init(&aclconfctx);
2150         ISC_LIST_INIT(viewlist);
2151
2152         /* Ensure exclusive access to configuration data. */
2153         result = isc_task_beginexclusive(server->task);
2154         RUNTIME_CHECK(result == ISC_R_SUCCESS);
2155
2156         /*
2157          * Parse the global default pseudo-config file.
2158          */
2159         if (first_time) {
2160                 CHECK(ns_config_parsedefaults(ns_g_parser, &ns_g_config));
2161                 RUNTIME_CHECK(cfg_map_get(ns_g_config, "options",
2162                                           &ns_g_defaults) ==
2163                               ISC_R_SUCCESS);
2164         }
2165
2166         /*
2167          * Parse the configuration file using the new config code.
2168          */
2169         result = ISC_R_FAILURE;
2170         config = NULL;
2171
2172         /*
2173          * Unless this is lwresd with the -C option, parse the config file.
2174          */
2175         if (!(ns_g_lwresdonly && lwresd_g_useresolvconf)) {
2176                 isc_log_write(ns_g_lctx,
2177                               NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
2178                               ISC_LOG_INFO, "loading configuration from '%s'",
2179                               filename);
2180                 CHECK(cfg_parser_create(ns_g_mctx, ns_g_lctx, &parser));
2181                 cfg_parser_setcallback(parser, directory_callback, NULL);
2182                 result = cfg_parse_file(parser, filename, &cfg_type_namedconf,
2183                                         &config);
2184         }
2185
2186         /*
2187          * If this is lwresd with the -C option, or lwresd with no -C or -c
2188          * option where the above parsing failed, parse resolv.conf.
2189          */
2190         if (ns_g_lwresdonly &&
2191             (lwresd_g_useresolvconf ||
2192              (!ns_g_conffileset && result == ISC_R_FILENOTFOUND)))
2193         {
2194                 isc_log_write(ns_g_lctx,
2195                               NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
2196                               ISC_LOG_INFO, "loading configuration from '%s'",
2197                               lwresd_g_resolvconffile);
2198                 if (parser != NULL)
2199                         cfg_parser_destroy(&parser);
2200                 CHECK(cfg_parser_create(ns_g_mctx, ns_g_lctx, &parser));
2201                 result = ns_lwresd_parseeresolvconf(ns_g_mctx, parser,
2202                                                     &config);
2203         }
2204         CHECK(result);
2205
2206         /*
2207          * Check the validity of the configuration.
2208          */
2209         CHECK(bind9_check_namedconf(config, ns_g_lctx, ns_g_mctx));
2210
2211         /*
2212          * Fill in the maps array, used for resolving defaults.
2213          */
2214         i = 0;
2215         options = NULL;
2216         result = cfg_map_get(config, "options", &options);
2217         if (result == ISC_R_SUCCESS)
2218                 maps[i++] = options;
2219         maps[i++] = ns_g_defaults;
2220         maps[i++] = NULL;
2221
2222         /*
2223          * Set process limits, which (usually) needs to be done as root.
2224          */
2225         set_limits(maps);
2226
2227         /*
2228          * Configure various server options.
2229          */
2230         configure_server_quota(maps, "transfers-out", &server->xfroutquota);
2231         configure_server_quota(maps, "tcp-clients", &server->tcpquota);
2232         configure_server_quota(maps, "recursive-clients",
2233                                &server->recursionquota);
2234         if (server->recursionquota.max > 1000)
2235                 isc_quota_soft(&server->recursionquota,
2236                                server->recursionquota.max - 100);
2237         else
2238                 isc_quota_soft(&server->recursionquota, 0);
2239
2240         CHECK(configure_view_acl(NULL, config, "blackhole", &aclconfctx,
2241                                  ns_g_mctx, &server->blackholeacl));
2242         if (server->blackholeacl != NULL)
2243                 dns_dispatchmgr_setblackhole(ns_g_dispatchmgr,
2244                                              server->blackholeacl);
2245
2246         obj = NULL;
2247         result = ns_config_get(maps, "match-mapped-addresses", &obj);
2248         INSIST(result == ISC_R_SUCCESS);
2249         server->aclenv.match_mapped = cfg_obj_asboolean(obj);
2250
2251         v4ports = NULL;
2252         v6ports = NULL;
2253         (void)ns_config_get(maps, "avoid-v4-udp-ports", &v4ports);
2254         (void)ns_config_get(maps, "avoid-v6-udp-ports", &v6ports);
2255         if (v4ports != NULL || v6ports != NULL) {
2256                 dns_portlist_t *portlist = NULL;
2257                 result = dns_portlist_create(ns_g_mctx, &portlist);
2258                 if (result == ISC_R_SUCCESS && v4ports != NULL)
2259                         result = portlist_fromconf(portlist, AF_INET, v4ports);
2260                 if (result == ISC_R_SUCCESS && v6ports != NULL)
2261                         portlist_fromconf(portlist, AF_INET6, v6ports);
2262                 if (result == ISC_R_SUCCESS)
2263                         dns_dispatchmgr_setblackportlist(ns_g_dispatchmgr, portlist);
2264                 if (portlist != NULL)
2265                         dns_portlist_detach(&portlist);
2266                 CHECK(result);
2267         } else
2268                 dns_dispatchmgr_setblackportlist(ns_g_dispatchmgr, NULL);
2269
2270         /*
2271          * Set the EDNS UDP size when we don't match a view.
2272          */
2273         obj = NULL;
2274         result = ns_config_get(maps, "edns-udp-size", &obj);
2275         INSIST(result == ISC_R_SUCCESS);
2276         udpsize = cfg_obj_asuint32(obj);
2277         if (udpsize < 512)
2278                 udpsize = 512;
2279         if (udpsize > 4096)
2280                 udpsize = 4096;
2281         ns_g_udpsize = (isc_uint16_t)udpsize;
2282
2283         /*
2284          * Configure the zone manager.
2285          */
2286         obj = NULL;
2287         result = ns_config_get(maps, "transfers-in", &obj);
2288         INSIST(result == ISC_R_SUCCESS);
2289         dns_zonemgr_settransfersin(server->zonemgr, cfg_obj_asuint32(obj));
2290
2291         obj = NULL;
2292         result = ns_config_get(maps, "transfers-per-ns", &obj);
2293         INSIST(result == ISC_R_SUCCESS);
2294         dns_zonemgr_settransfersperns(server->zonemgr, cfg_obj_asuint32(obj));
2295
2296         obj = NULL;
2297         result = ns_config_get(maps, "serial-query-rate", &obj);
2298         INSIST(result == ISC_R_SUCCESS);
2299         dns_zonemgr_setserialqueryrate(server->zonemgr, cfg_obj_asuint32(obj));
2300
2301         /*
2302          * Determine which port to use for listening for incoming connections.
2303          */
2304         if (ns_g_port != 0)
2305                 listen_port = ns_g_port;
2306         else
2307                 CHECKM(ns_config_getport(config, &listen_port), "port");
2308
2309         /*
2310          * Find the listen queue depth.
2311          */
2312         obj = NULL;
2313         result = ns_config_get(maps, "tcp-listen-queue", &obj);
2314         INSIST(result == ISC_R_SUCCESS);
2315         ns_g_listen = cfg_obj_asuint32(obj);
2316         if (ns_g_listen < 3)
2317                 ns_g_listen = 3;
2318
2319         /*
2320          * Configure the interface manager according to the "listen-on"
2321          * statement.
2322          */
2323         {
2324                 const cfg_obj_t *clistenon = NULL;
2325                 ns_listenlist_t *listenon = NULL;
2326
2327                 clistenon = NULL;
2328                 /*
2329                  * Even though listen-on is present in the default
2330                  * configuration, we can't use it here, since it isn't
2331                  * used if we're in lwresd mode.  This way is easier.
2332                  */
2333                 if (options != NULL)
2334                         (void)cfg_map_get(options, "listen-on", &clistenon);
2335                 if (clistenon != NULL) {
2336                         result = ns_listenlist_fromconfig(clistenon,
2337                                                           config,
2338                                                           &aclconfctx,
2339                                                           ns_g_mctx,
2340                                                           &listenon);
2341                 } else if (!ns_g_lwresdonly) {
2342                         /*
2343                          * Not specified, use default.
2344                          */
2345                         CHECK(ns_listenlist_default(ns_g_mctx, listen_port,
2346                                                     ISC_TRUE, &listenon));
2347                 }
2348                 if (listenon != NULL) {
2349                         ns_interfacemgr_setlistenon4(server->interfacemgr,
2350                                                      listenon);
2351                         ns_listenlist_detach(&listenon);
2352                 }
2353         }
2354         /*
2355          * Ditto for IPv6.
2356          */
2357         {
2358                 const cfg_obj_t *clistenon = NULL;
2359                 ns_listenlist_t *listenon = NULL;
2360
2361                 if (options != NULL)
2362                         (void)cfg_map_get(options, "listen-on-v6", &clistenon);
2363                 if (clistenon != NULL) {
2364                         result = ns_listenlist_fromconfig(clistenon,
2365                                                           config,
2366                                                           &aclconfctx,
2367                                                           ns_g_mctx,
2368                                                           &listenon);
2369                 } else if (!ns_g_lwresdonly) {
2370                         /*
2371                          * Not specified, use default.
2372                          */
2373                         CHECK(ns_listenlist_default(ns_g_mctx, listen_port,
2374                                                     ISC_FALSE, &listenon));
2375                 }
2376                 if (listenon != NULL) {
2377                         ns_interfacemgr_setlistenon6(server->interfacemgr,
2378                                                      listenon);
2379                         ns_listenlist_detach(&listenon);
2380                 }
2381         }
2382
2383         /*
2384          * Rescan the interface list to pick up changes in the
2385          * listen-on option.  It's important that we do this before we try
2386          * to configure the query source, since the dispatcher we use might
2387          * be shared with an interface.
2388          */
2389         scan_interfaces(server, ISC_TRUE);
2390
2391         /*
2392          * Arrange for further interface scanning to occur periodically
2393          * as specified by the "interface-interval" option.
2394          */
2395         obj = NULL;
2396         result = ns_config_get(maps, "interface-interval", &obj);
2397         INSIST(result == ISC_R_SUCCESS);
2398         interface_interval = cfg_obj_asuint32(obj) * 60;
2399         if (interface_interval == 0) {
2400                 CHECK(isc_timer_reset(server->interface_timer,
2401                                       isc_timertype_inactive,
2402                                       NULL, NULL, ISC_TRUE));
2403         } else if (server->interface_interval != interface_interval) {
2404                 isc_interval_t interval;
2405                 isc_interval_set(&interval, interface_interval, 0);
2406                 CHECK(isc_timer_reset(server->interface_timer,
2407                                       isc_timertype_ticker,
2408                                       NULL, &interval, ISC_FALSE));
2409         }
2410         server->interface_interval = interface_interval;
2411
2412         /*
2413          * Configure the dialup heartbeat timer.
2414          */
2415         obj = NULL;
2416         result = ns_config_get(maps, "heartbeat-interval", &obj);
2417         INSIST(result == ISC_R_SUCCESS);
2418         heartbeat_interval = cfg_obj_asuint32(obj) * 60;
2419         if (heartbeat_interval == 0) {
2420                 CHECK(isc_timer_reset(server->heartbeat_timer,
2421                                       isc_timertype_inactive,
2422                                       NULL, NULL, ISC_TRUE));
2423         } else if (server->heartbeat_interval != heartbeat_interval) {
2424                 isc_interval_t interval;
2425                 isc_interval_set(&interval, heartbeat_interval, 0);
2426                 CHECK(isc_timer_reset(server->heartbeat_timer,
2427                                       isc_timertype_ticker,
2428                                       NULL, &interval, ISC_FALSE));
2429         }
2430         server->heartbeat_interval = heartbeat_interval;
2431
2432         /*
2433          * Configure and freeze all explicit views.  Explicit
2434          * views that have zones were already created at parsing
2435          * time, but views with no zones must be created here.
2436          */
2437         views = NULL;
2438         (void)cfg_map_get(config, "view", &views);
2439         for (element = cfg_list_first(views);
2440              element != NULL;
2441              element = cfg_list_next(element))
2442         {
2443                 const cfg_obj_t *vconfig = cfg_listelt_value(element);
2444                 view = NULL;
2445
2446                 CHECK(create_view(vconfig, &viewlist, &view));
2447                 INSIST(view != NULL);
2448                 CHECK(configure_view(view, config, vconfig,
2449                                      ns_g_mctx, &aclconfctx, ISC_TRUE));
2450                 dns_view_freeze(view);
2451                 dns_view_detach(&view);
2452         }
2453
2454         /*
2455          * Make sure we have a default view if and only if there
2456          * were no explicit views.
2457          */
2458         if (views == NULL) {
2459                 /*
2460                  * No explicit views; there ought to be a default view.
2461                  * There may already be one created as a side effect
2462                  * of zone statements, or we may have to create one.
2463                  * In either case, we need to configure and freeze it.
2464                  */
2465                 CHECK(create_view(NULL, &viewlist, &view));
2466                 CHECK(configure_view(view, config, NULL, ns_g_mctx,
2467                                      &aclconfctx, ISC_TRUE));
2468                 dns_view_freeze(view);
2469                 dns_view_detach(&view);
2470         }
2471
2472         /*
2473          * Create (or recreate) the built-in views.  Currently
2474          * there is only one, the _bind view.
2475          */
2476         builtin_views = NULL;
2477         RUNTIME_CHECK(cfg_map_get(ns_g_config, "view",
2478                                   &builtin_views) == ISC_R_SUCCESS);
2479         for (element = cfg_list_first(builtin_views);
2480              element != NULL;
2481              element = cfg_list_next(element))
2482         {
2483                 const cfg_obj_t *vconfig = cfg_listelt_value(element);
2484                 CHECK(create_view(vconfig, &viewlist, &view));
2485                 CHECK(configure_view(view, config, vconfig, ns_g_mctx,
2486                                      &aclconfctx, ISC_FALSE));
2487                 dns_view_freeze(view);
2488                 dns_view_detach(&view);
2489                 view = NULL;
2490         }
2491
2492         /*
2493          * Swap our new view list with the production one.
2494          */
2495         tmpviewlist = server->viewlist;
2496         server->viewlist = viewlist;
2497         viewlist = tmpviewlist;
2498
2499         /*
2500          * Load the TKEY information from the configuration.
2501          */
2502         if (options != NULL) {
2503                 dns_tkeyctx_t *t = NULL;
2504                 CHECKM(ns_tkeyctx_fromconfig(options, ns_g_mctx, ns_g_entropy,
2505                                              &t),
2506                        "configuring TKEY");
2507                 if (server->tkeyctx != NULL)
2508                         dns_tkeyctx_destroy(&server->tkeyctx);
2509                 server->tkeyctx = t;
2510         }
2511
2512         /*
2513          * Bind the control port(s).
2514          */
2515         CHECKM(ns_controls_configure(ns_g_server->controls, config,
2516                                      &aclconfctx),
2517                "binding control channel(s)");
2518
2519         /*
2520          * Bind the lwresd port(s).
2521          */
2522         CHECKM(ns_lwresd_configure(ns_g_mctx, config),
2523                "binding lightweight resolver ports");
2524
2525         /*
2526          * Open the source of entropy.
2527          */
2528         if (first_time) {
2529                 obj = NULL;
2530                 result = ns_config_get(maps, "random-device", &obj);
2531                 if (result != ISC_R_SUCCESS) {
2532                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
2533                                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
2534                                       "no source of entropy found");
2535                 } else {
2536                         const char *randomdev = cfg_obj_asstring(obj);
2537                         result = isc_entropy_createfilesource(ns_g_entropy,
2538                                                               randomdev);
2539                         if (result != ISC_R_SUCCESS)
2540                                 isc_log_write(ns_g_lctx,
2541                                               NS_LOGCATEGORY_GENERAL,
2542                                               NS_LOGMODULE_SERVER,
2543                                               ISC_LOG_INFO,
2544                                               "could not open entropy source "
2545                                               "%s: %s",
2546                                               randomdev,
2547                                               isc_result_totext(result));
2548 #ifdef PATH_RANDOMDEV
2549                         if (ns_g_fallbackentropy != NULL) {
2550                                 if (result != ISC_R_SUCCESS) {
2551                                         isc_log_write(ns_g_lctx,
2552                                                       NS_LOGCATEGORY_GENERAL,
2553                                                       NS_LOGMODULE_SERVER,
2554                                                       ISC_LOG_INFO,
2555                                                       "using pre-chroot entropy source "
2556                                                       "%s",
2557                                                       PATH_RANDOMDEV);
2558                                         isc_entropy_detach(&ns_g_entropy);
2559                                         isc_entropy_attach(ns_g_fallbackentropy,
2560                                                            &ns_g_entropy);
2561                                 }
2562                                 isc_entropy_detach(&ns_g_fallbackentropy);
2563                         }
2564 #endif
2565                 }
2566         }
2567
2568         /*
2569          * Relinquish root privileges.
2570          */
2571         if (first_time)
2572                 ns_os_changeuser();
2573
2574         /*
2575          * Configure the logging system.
2576          *
2577          * Do this after changing UID to make sure that any log
2578          * files specified in named.conf get created by the
2579          * unprivileged user, not root.
2580          */
2581         if (ns_g_logstderr) {
2582                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
2583                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
2584                               "ignoring config file logging "
2585                               "statement due to -g option");
2586         } else {
2587                 const cfg_obj_t *logobj = NULL;
2588                 isc_logconfig_t *logc = NULL;
2589
2590                 CHECKM(isc_logconfig_create(ns_g_lctx, &logc),
2591                        "creating new logging configuration");
2592
2593                 logobj = NULL;
2594                 (void)cfg_map_get(config, "logging", &logobj);
2595                 if (logobj != NULL) {
2596                         CHECKM(ns_log_configure(logc, logobj),
2597                                "configuring logging");
2598                 } else {
2599                         CHECKM(ns_log_setdefaultchannels(logc),
2600                                "setting up default logging channels");
2601                         CHECKM(ns_log_setunmatchedcategory(logc),
2602                                "setting up default 'category unmatched'");
2603                         CHECKM(ns_log_setdefaultcategory(logc),
2604                                "setting up default 'category default'");
2605                 }
2606
2607                 result = isc_logconfig_use(ns_g_lctx, logc);
2608                 if (result != ISC_R_SUCCESS) {
2609                         isc_logconfig_destroy(&logc);
2610                         CHECKM(result, "installing logging configuration");
2611                 }
2612
2613                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
2614                               NS_LOGMODULE_SERVER, ISC_LOG_DEBUG(1),
2615                               "now using logging configuration from "
2616                               "config file");
2617         }
2618
2619         /*
2620          * Set the default value of the query logging flag depending
2621          * whether a "queries" category has been defined.  This is
2622          * a disgusting hack, but we need to do this for BIND 8
2623          * compatibility.
2624          */
2625         if (first_time) {
2626                 const cfg_obj_t *logobj = NULL;
2627                 const cfg_obj_t *categories = NULL;
2628
2629                 obj = NULL;
2630                 if (ns_config_get(maps, "querylog", &obj) == ISC_R_SUCCESS) {
2631                         server->log_queries = cfg_obj_asboolean(obj);
2632                 } else {
2633
2634                         (void)cfg_map_get(config, "logging", &logobj);
2635                         if (logobj != NULL)
2636                                 (void)cfg_map_get(logobj, "category",
2637                                                   &categories);
2638                         if (categories != NULL) {
2639                                 const cfg_listelt_t *element;
2640                                 for (element = cfg_list_first(categories);
2641                                      element != NULL;
2642                                      element = cfg_list_next(element))
2643                                 {
2644                                         const cfg_obj_t *catobj;
2645                                         const char *str;
2646
2647                                         obj = cfg_listelt_value(element);
2648                                         catobj = cfg_tuple_get(obj, "name");
2649                                         str = cfg_obj_asstring(catobj);
2650                                         if (strcasecmp(str, "queries") == 0)
2651                                                 server->log_queries = ISC_TRUE;
2652                                 }
2653                         }
2654                 }
2655         }
2656
2657         obj = NULL;
2658         if (ns_config_get(maps, "pid-file", &obj) == ISC_R_SUCCESS)
2659                 if (cfg_obj_isvoid(obj))
2660                         ns_os_writepidfile(NULL, first_time);
2661                 else
2662                         ns_os_writepidfile(cfg_obj_asstring(obj), first_time);
2663         else if (ns_g_lwresdonly)
2664                 ns_os_writepidfile(lwresd_g_defaultpidfile, first_time);
2665         else
2666                 ns_os_writepidfile(ns_g_defaultpidfile, first_time);
2667
2668         obj = NULL;
2669         if (options != NULL &&
2670             cfg_map_get(options, "memstatistics-file", &obj) == ISC_R_SUCCESS)
2671                 ns_main_setmemstats(cfg_obj_asstring(obj));
2672         else
2673                 ns_main_setmemstats(NULL);
2674
2675         obj = NULL;
2676         result = ns_config_get(maps, "statistics-file", &obj);
2677         INSIST(result == ISC_R_SUCCESS);
2678         CHECKM(setstring(server, &server->statsfile, cfg_obj_asstring(obj)),
2679                "strdup");
2680
2681         obj = NULL;
2682         result = ns_config_get(maps, "dump-file", &obj);
2683         INSIST(result == ISC_R_SUCCESS);
2684         CHECKM(setstring(server, &server->dumpfile, cfg_obj_asstring(obj)),
2685                "strdup");
2686
2687         obj = NULL;
2688         result = ns_config_get(maps, "recursing-file", &obj);
2689         INSIST(result == ISC_R_SUCCESS);
2690         CHECKM(setstring(server, &server->recfile, cfg_obj_asstring(obj)),
2691                "strdup");
2692
2693         obj = NULL;
2694         result = ns_config_get(maps, "version", &obj);
2695         if (result == ISC_R_SUCCESS) {
2696                 CHECKM(setoptstring(server, &server->version, obj), "strdup");
2697                 server->version_set = ISC_TRUE;
2698         } else {
2699                 server->version_set = ISC_FALSE;
2700         }
2701
2702         obj = NULL;
2703         result = ns_config_get(maps, "hostname", &obj);
2704         if (result == ISC_R_SUCCESS) {
2705                 CHECKM(setoptstring(server, &server->hostname, obj), "strdup");
2706                 server->hostname_set = ISC_TRUE;
2707         } else {
2708                 server->hostname_set = ISC_FALSE;
2709         }
2710
2711         obj = NULL;
2712         result = ns_config_get(maps, "server-id", &obj);
2713         server->server_usehostname = ISC_FALSE;
2714         if (result == ISC_R_SUCCESS && cfg_obj_isboolean(obj)) {
2715                 server->server_usehostname = ISC_TRUE;
2716         } else if (result == ISC_R_SUCCESS) {
2717                 CHECKM(setoptstring(server, &server->server_id, obj), "strdup");
2718         } else {
2719                 result = setoptstring(server, &server->server_id, NULL);
2720                 RUNTIME_CHECK(result == ISC_R_SUCCESS);
2721         }
2722
2723         obj = NULL;
2724         result = ns_config_get(maps, "flush-zones-on-shutdown", &obj);
2725         if (result == ISC_R_SUCCESS) {
2726                 server->flushonshutdown = cfg_obj_asboolean(obj);
2727         } else {
2728                 server->flushonshutdown = ISC_FALSE;
2729         }
2730
2731         result = ISC_R_SUCCESS;
2732
2733  cleanup:
2734         ns_aclconfctx_destroy(&aclconfctx);
2735
2736         if (parser != NULL) {
2737                 if (config != NULL)
2738                         cfg_obj_destroy(parser, &config);
2739                 cfg_parser_destroy(&parser);
2740         }
2741
2742         if (view != NULL)
2743                 dns_view_detach(&view);
2744
2745         /*
2746          * This cleans up either the old production view list
2747          * or our temporary list depending on whether they
2748          * were swapped above or not.
2749          */
2750         for (view = ISC_LIST_HEAD(viewlist);
2751              view != NULL;
2752              view = view_next) {
2753                 view_next = ISC_LIST_NEXT(view, link);
2754                 ISC_LIST_UNLINK(viewlist, view, link);
2755                 dns_view_detach(&view);
2756
2757         }
2758
2759         /*
2760          * Adjust the listening interfaces in accordance with the source
2761          * addresses specified in views and zones.
2762          */
2763         if (isc_net_probeipv6() == ISC_R_SUCCESS)
2764                 adjust_interfaces(server, ns_g_mctx);
2765
2766         /* Relinquish exclusive access to configuration data. */
2767         isc_task_endexclusive(server->task);
2768
2769         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
2770                       ISC_LOG_DEBUG(1), "load_configuration: %s",
2771                       isc_result_totext(result));
2772
2773         return (result);
2774 }
2775
2776 static isc_result_t
2777 load_zones(ns_server_t *server, isc_boolean_t stop) {
2778         isc_result_t result;
2779         dns_view_t *view;
2780
2781         result = isc_task_beginexclusive(server->task);
2782         RUNTIME_CHECK(result == ISC_R_SUCCESS);
2783
2784         /*
2785          * Load zone data from disk.
2786          */
2787         for (view = ISC_LIST_HEAD(server->viewlist);
2788              view != NULL;
2789              view = ISC_LIST_NEXT(view, link))
2790         {
2791                 CHECK(dns_view_load(view, stop));
2792         }
2793
2794         /*
2795          * Force zone maintenance.  Do this after loading
2796          * so that we know when we need to force AXFR of
2797          * slave zones whose master files are missing.
2798          */
2799         CHECK(dns_zonemgr_forcemaint(server->zonemgr));
2800  cleanup:
2801         isc_task_endexclusive(server->task);
2802         return (result);
2803 }
2804
2805 static isc_result_t
2806 load_new_zones(ns_server_t *server, isc_boolean_t stop) {
2807         isc_result_t result;
2808         dns_view_t *view;
2809
2810         result = isc_task_beginexclusive(server->task);
2811         RUNTIME_CHECK(result == ISC_R_SUCCESS);
2812
2813         /*
2814          * Load zone data from disk.
2815          */
2816         for (view = ISC_LIST_HEAD(server->viewlist);
2817              view != NULL;
2818              view = ISC_LIST_NEXT(view, link))
2819         {
2820                 CHECK(dns_view_loadnew(view, stop));
2821         }
2822         /*
2823          * Force zone maintenance.  Do this after loading
2824          * so that we know when we need to force AXFR of
2825          * slave zones whose master files are missing.
2826          */
2827         dns_zonemgr_resumexfrs(server->zonemgr);
2828  cleanup:
2829         isc_task_endexclusive(server->task);
2830         return (result);
2831 }
2832
2833 static void
2834 run_server(isc_task_t *task, isc_event_t *event) {
2835         isc_result_t result;
2836         ns_server_t *server = (ns_server_t *)event->ev_arg;
2837
2838         INSIST(task == server->task);
2839
2840         isc_event_free(&event);
2841
2842         CHECKFATAL(dns_dispatchmgr_create(ns_g_mctx, ns_g_entropy,
2843                                           &ns_g_dispatchmgr),
2844                    "creating dispatch manager");
2845
2846         CHECKFATAL(ns_interfacemgr_create(ns_g_mctx, ns_g_taskmgr,
2847                                           ns_g_socketmgr, ns_g_dispatchmgr,
2848                                           &server->interfacemgr),
2849                    "creating interface manager");
2850
2851         CHECKFATAL(isc_timer_create(ns_g_timermgr, isc_timertype_inactive,
2852                                     NULL, NULL, server->task,
2853                                     interface_timer_tick,
2854                                     server, &server->interface_timer),
2855                    "creating interface timer");
2856
2857         CHECKFATAL(isc_timer_create(ns_g_timermgr, isc_timertype_inactive,
2858                                     NULL, NULL, server->task,
2859                                     heartbeat_timer_tick,
2860                                     server, &server->heartbeat_timer),
2861                    "creating heartbeat timer");
2862
2863         CHECKFATAL(cfg_parser_create(ns_g_mctx, NULL, &ns_g_parser),
2864                    "creating default configuration parser");
2865
2866         if (ns_g_lwresdonly)
2867                 CHECKFATAL(load_configuration(lwresd_g_conffile, server,
2868                                               ISC_TRUE),
2869                            "loading configuration");
2870         else
2871                 CHECKFATAL(load_configuration(ns_g_conffile, server, ISC_TRUE),
2872                            "loading configuration");
2873
2874         isc_hash_init();
2875
2876         CHECKFATAL(load_zones(server, ISC_FALSE), "loading zones");
2877
2878         ns_os_started();
2879         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
2880                       ISC_LOG_NOTICE, "running");
2881 }
2882
2883 void
2884 ns_server_flushonshutdown(ns_server_t *server, isc_boolean_t flush) {
2885
2886         REQUIRE(NS_SERVER_VALID(server));
2887
2888         server->flushonshutdown = flush;
2889 }
2890
2891 static void
2892 shutdown_server(isc_task_t *task, isc_event_t *event) {
2893         isc_result_t result;
2894         dns_view_t *view, *view_next;
2895         ns_server_t *server = (ns_server_t *)event->ev_arg;
2896         isc_boolean_t flush = server->flushonshutdown;
2897
2898         UNUSED(task);
2899         INSIST(task == server->task);
2900
2901         result = isc_task_beginexclusive(server->task);
2902         RUNTIME_CHECK(result == ISC_R_SUCCESS);
2903
2904         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
2905                       ISC_LOG_INFO, "shutting down%s",
2906                       flush ? ": flushing changes" : "");
2907
2908         ns_controls_shutdown(server->controls);
2909         end_reserved_dispatches(server, ISC_TRUE);
2910
2911         cfg_obj_destroy(ns_g_parser, &ns_g_config);
2912         cfg_parser_destroy(&ns_g_parser);
2913
2914         for (view = ISC_LIST_HEAD(server->viewlist);
2915              view != NULL;
2916              view = view_next) {
2917                 view_next = ISC_LIST_NEXT(view, link);
2918                 ISC_LIST_UNLINK(server->viewlist, view, link);
2919                 if (flush)
2920                         dns_view_flushanddetach(&view);
2921                 else
2922                         dns_view_detach(&view);
2923         }
2924
2925         isc_timer_detach(&server->interface_timer);
2926         isc_timer_detach(&server->heartbeat_timer);
2927
2928         ns_interfacemgr_shutdown(server->interfacemgr);
2929         ns_interfacemgr_detach(&server->interfacemgr);
2930
2931         dns_dispatchmgr_destroy(&ns_g_dispatchmgr);
2932
2933         dns_zonemgr_shutdown(server->zonemgr);
2934
2935         if (server->blackholeacl != NULL)
2936                 dns_acl_detach(&server->blackholeacl);
2937
2938         dns_db_detach(&server->in_roothints);
2939
2940         isc_task_endexclusive(server->task);
2941
2942         isc_task_detach(&server->task);
2943
2944         isc_event_free(&event);
2945 }
2946
2947 void
2948 ns_server_create(isc_mem_t *mctx, ns_server_t **serverp) {
2949         isc_result_t result;
2950
2951         ns_server_t *server = isc_mem_get(mctx, sizeof(*server));
2952         if (server == NULL)
2953                 fatal("allocating server object", ISC_R_NOMEMORY);
2954
2955         server->mctx = mctx;
2956         server->task = NULL;
2957
2958         /* Initialize configuration data with default values. */
2959
2960         result = isc_quota_init(&server->xfroutquota, 10);
2961         RUNTIME_CHECK(result == ISC_R_SUCCESS);
2962         result = isc_quota_init(&server->tcpquota, 10);
2963         RUNTIME_CHECK(result == ISC_R_SUCCESS);
2964         result = isc_quota_init(&server->recursionquota, 100);
2965         RUNTIME_CHECK(result == ISC_R_SUCCESS);
2966
2967         result = dns_aclenv_init(mctx, &server->aclenv);
2968         RUNTIME_CHECK(result == ISC_R_SUCCESS);
2969
2970         /* Initialize server data structures. */
2971         server->zonemgr = NULL;
2972         server->interfacemgr = NULL;
2973         ISC_LIST_INIT(server->viewlist);
2974         server->in_roothints = NULL;
2975         server->blackholeacl = NULL;
2976
2977         CHECKFATAL(dns_rootns_create(mctx, dns_rdataclass_in, NULL,
2978                                      &server->in_roothints),
2979                    "setting up root hints");
2980
2981         CHECKFATAL(isc_mutex_init(&server->reload_event_lock),
2982                    "initializing reload event lock");
2983         server->reload_event =
2984                 isc_event_allocate(ns_g_mctx, server,
2985                                    NS_EVENT_RELOAD,
2986                                    ns_server_reload,
2987                                    server,
2988                                    sizeof(isc_event_t));
2989         CHECKFATAL(server->reload_event == NULL ?
2990                    ISC_R_NOMEMORY : ISC_R_SUCCESS,
2991                    "allocating reload event");
2992
2993         CHECKFATAL(dst_lib_init(ns_g_mctx, ns_g_entropy, ISC_ENTROPY_GOODONLY),
2994                    "initializing DST");
2995
2996         server->tkeyctx = NULL;
2997         CHECKFATAL(dns_tkeyctx_create(ns_g_mctx, ns_g_entropy,
2998                                       &server->tkeyctx),
2999                    "creating TKEY context");
3000
3001         /*
3002          * Setup the server task, which is responsible for coordinating
3003          * startup and shutdown of the server.
3004          */
3005         CHECKFATAL(isc_task_create(ns_g_taskmgr, 0, &server->task),
3006                    "creating server task");
3007         isc_task_setname(server->task, "server", server);
3008         CHECKFATAL(isc_task_onshutdown(server->task, shutdown_server, server),
3009                    "isc_task_onshutdown");
3010         CHECKFATAL(isc_app_onrun(ns_g_mctx, server->task, run_server, server),
3011                    "isc_app_onrun");
3012
3013         server->interface_timer = NULL;
3014         server->heartbeat_timer = NULL;
3015
3016         server->interface_interval = 0;
3017         server->heartbeat_interval = 0;
3018
3019         CHECKFATAL(dns_zonemgr_create(ns_g_mctx, ns_g_taskmgr, ns_g_timermgr,
3020                                       ns_g_socketmgr, &server->zonemgr),
3021                    "dns_zonemgr_create");
3022
3023         server->statsfile = isc_mem_strdup(server->mctx, "named.stats");
3024         CHECKFATAL(server->statsfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
3025                    "isc_mem_strdup");
3026         server->querystats = NULL;
3027
3028         server->dumpfile = isc_mem_strdup(server->mctx, "named_dump.db");
3029         CHECKFATAL(server->dumpfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
3030                    "isc_mem_strdup");
3031
3032         server->recfile = isc_mem_strdup(server->mctx, "named.recursing");
3033         CHECKFATAL(server->recfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
3034                    "isc_mem_strdup");
3035
3036         server->hostname_set = ISC_FALSE;
3037         server->hostname = NULL;
3038         server->version_set = ISC_FALSE;
3039         server->version = NULL;
3040         server->server_usehostname = ISC_FALSE;
3041         server->server_id = NULL;
3042
3043         CHECKFATAL(dns_stats_alloccounters(ns_g_mctx, &server->querystats),
3044                    "dns_stats_alloccounters");
3045
3046         server->flushonshutdown = ISC_FALSE;
3047         server->log_queries = ISC_FALSE;
3048
3049         server->controls = NULL;
3050         CHECKFATAL(ns_controls_create(server, &server->controls),
3051                    "ns_controls_create");
3052         server->dispatchgen = 0;
3053         ISC_LIST_INIT(server->dispatches);
3054
3055         server->magic = NS_SERVER_MAGIC;
3056         *serverp = server;
3057 }
3058
3059 void
3060 ns_server_destroy(ns_server_t **serverp) {
3061         ns_server_t *server = *serverp;
3062         REQUIRE(NS_SERVER_VALID(server));
3063
3064         ns_controls_destroy(&server->controls);
3065
3066         dns_stats_freecounters(server->mctx, &server->querystats);
3067
3068         isc_mem_free(server->mctx, server->statsfile);
3069         isc_mem_free(server->mctx, server->dumpfile);
3070         isc_mem_free(server->mctx, server->recfile);
3071
3072         if (server->version != NULL)
3073                 isc_mem_free(server->mctx, server->version);
3074         if (server->hostname != NULL)
3075                 isc_mem_free(server->mctx, server->hostname);
3076         if (server->server_id != NULL)
3077                 isc_mem_free(server->mctx, server->server_id);
3078
3079         dns_zonemgr_detach(&server->zonemgr);
3080
3081         if (server->tkeyctx != NULL)
3082                 dns_tkeyctx_destroy(&server->tkeyctx);
3083
3084         dst_lib_destroy();
3085
3086         isc_event_free(&server->reload_event);
3087
3088         INSIST(ISC_LIST_EMPTY(server->viewlist));
3089
3090         dns_aclenv_destroy(&server->aclenv);
3091
3092         isc_quota_destroy(&server->recursionquota);
3093         isc_quota_destroy(&server->tcpquota);
3094         isc_quota_destroy(&server->xfroutquota);
3095
3096         server->magic = 0;
3097         isc_mem_put(server->mctx, server, sizeof(*server));
3098         *serverp = NULL;
3099 }
3100
3101 static void
3102 fatal(const char *msg, isc_result_t result) {
3103         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
3104                       ISC_LOG_CRITICAL, "%s: %s", msg,
3105                       isc_result_totext(result));
3106         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
3107                       ISC_LOG_CRITICAL, "exiting (due to fatal error)");
3108         exit(1);
3109 }
3110
3111 static void
3112 start_reserved_dispatches(ns_server_t *server) {
3113
3114         REQUIRE(NS_SERVER_VALID(server));
3115
3116         server->dispatchgen++;
3117 }
3118
3119 static void
3120 end_reserved_dispatches(ns_server_t *server, isc_boolean_t all) {
3121         ns_dispatch_t *dispatch, *nextdispatch;
3122
3123         REQUIRE(NS_SERVER_VALID(server));
3124
3125         for (dispatch = ISC_LIST_HEAD(server->dispatches);
3126              dispatch != NULL;
3127              dispatch = nextdispatch) {
3128                 nextdispatch = ISC_LIST_NEXT(dispatch, link);
3129                 if (!all && server->dispatchgen == dispatch-> dispatchgen)
3130                         continue;
3131                 ISC_LIST_UNLINK(server->dispatches, dispatch, link);
3132                 dns_dispatch_detach(&dispatch->dispatch);
3133                 isc_mem_put(server->mctx, dispatch, sizeof(*dispatch));
3134         }
3135 }
3136
3137 void
3138 ns_add_reserved_dispatch(ns_server_t *server, const isc_sockaddr_t *addr) {
3139         ns_dispatch_t *dispatch;
3140         in_port_t port;
3141         char addrbuf[ISC_SOCKADDR_FORMATSIZE];
3142         isc_result_t result;
3143         unsigned int attrs, attrmask;
3144
3145         REQUIRE(NS_SERVER_VALID(server));
3146
3147         port = isc_sockaddr_getport(addr);
3148         if (port == 0 || port >= 1024)
3149                 return;
3150
3151         for (dispatch = ISC_LIST_HEAD(server->dispatches);
3152              dispatch != NULL;
3153              dispatch = ISC_LIST_NEXT(dispatch, link)) {
3154                 if (isc_sockaddr_equal(&dispatch->addr, addr))
3155                         break;
3156         }
3157         if (dispatch != NULL) {
3158                 dispatch->dispatchgen = server->dispatchgen;
3159                 return;
3160         }
3161
3162         dispatch = isc_mem_get(server->mctx, sizeof(*dispatch));
3163         if (dispatch == NULL) {
3164                 result = ISC_R_NOMEMORY;
3165                 goto cleanup;
3166         }
3167
3168         dispatch->addr = *addr;
3169         dispatch->dispatchgen = server->dispatchgen;
3170         dispatch->dispatch = NULL;
3171
3172         attrs = 0;
3173         attrs |= DNS_DISPATCHATTR_UDP;
3174         switch (isc_sockaddr_pf(addr)) {
3175         case AF_INET:
3176                 attrs |= DNS_DISPATCHATTR_IPV4;
3177                 break;
3178         case AF_INET6:
3179                 attrs |= DNS_DISPATCHATTR_IPV6;
3180                 break;
3181         default:
3182                 result = ISC_R_NOTIMPLEMENTED;
3183                 goto cleanup;
3184         }
3185         attrmask = 0;
3186         attrmask |= DNS_DISPATCHATTR_UDP;
3187         attrmask |= DNS_DISPATCHATTR_TCP;
3188         attrmask |= DNS_DISPATCHATTR_IPV4;
3189         attrmask |= DNS_DISPATCHATTR_IPV6;
3190
3191         result = dns_dispatch_getudp(ns_g_dispatchmgr, ns_g_socketmgr,
3192                                      ns_g_taskmgr, &dispatch->addr, 4096,
3193                                      1000, 32768, 16411, 16433,
3194                                      attrs, attrmask, &dispatch->dispatch);
3195         if (result != ISC_R_SUCCESS)
3196                 goto cleanup;
3197
3198         ISC_LIST_INITANDPREPEND(server->dispatches, dispatch, link);
3199
3200         return;
3201
3202  cleanup:
3203         if (dispatch != NULL)
3204                 isc_mem_put(server->mctx, dispatch, sizeof(*dispatch));
3205         isc_sockaddr_format(addr, addrbuf, sizeof(addrbuf));
3206         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3207                       NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
3208                       "unable to create dispatch for reserved port %s: %s",
3209                       addrbuf, isc_result_totext(result));
3210 }
3211
3212
3213 static isc_result_t
3214 loadconfig(ns_server_t *server) {
3215         isc_result_t result;
3216         start_reserved_dispatches(server);
3217         result = load_configuration(ns_g_lwresdonly ?
3218                                     lwresd_g_conffile : ns_g_conffile,
3219                                     server, ISC_FALSE);
3220         if (result == ISC_R_SUCCESS)
3221                 end_reserved_dispatches(server, ISC_FALSE);
3222         else
3223                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3224                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
3225                               "reloading configuration failed: %s",
3226                               isc_result_totext(result));
3227         return (result);
3228 }
3229
3230 static isc_result_t
3231 reload(ns_server_t *server) {
3232         isc_result_t result;
3233         CHECK(loadconfig(server));
3234
3235         result = load_zones(server, ISC_FALSE);
3236         if (result != ISC_R_SUCCESS) {
3237                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3238                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
3239                               "reloading zones failed: %s",
3240                               isc_result_totext(result));
3241         }
3242  cleanup:
3243         return (result);
3244 }
3245
3246 static void
3247 reconfig(ns_server_t *server) {
3248         isc_result_t result;
3249         CHECK(loadconfig(server));
3250
3251         result = load_new_zones(server, ISC_FALSE);
3252         if (result != ISC_R_SUCCESS) {
3253                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3254                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
3255                               "loading new zones failed: %s",
3256                               isc_result_totext(result));
3257         }
3258  cleanup: ;
3259 }
3260
3261 /*
3262  * Handle a reload event (from SIGHUP).
3263  */
3264 static void
3265 ns_server_reload(isc_task_t *task, isc_event_t *event) {
3266         ns_server_t *server = (ns_server_t *)event->ev_arg;
3267
3268         INSIST(task = server->task);
3269         UNUSED(task);
3270
3271         (void)reload(server);
3272
3273         LOCK(&server->reload_event_lock);
3274         INSIST(server->reload_event == NULL);
3275         server->reload_event = event;
3276         UNLOCK(&server->reload_event_lock);
3277 }
3278
3279 void
3280 ns_server_reloadwanted(ns_server_t *server) {
3281         LOCK(&server->reload_event_lock);
3282         if (server->reload_event != NULL)
3283                 isc_task_send(server->task, &server->reload_event);
3284         UNLOCK(&server->reload_event_lock);
3285 }
3286
3287 static char *
3288 next_token(char **stringp, const char *delim) {
3289         char *res;
3290
3291         do {
3292                 res = strsep(stringp, delim);
3293                 if (res == NULL)
3294                         break;
3295         } while (*res == '\0');
3296         return (res);
3297 }
3298
3299 /*
3300  * Find the zone specified in the control channel command 'args',
3301  * if any.  If a zone is specified, point '*zonep' at it, otherwise
3302  * set '*zonep' to NULL.
3303  */
3304 static isc_result_t
3305 zone_from_args(ns_server_t *server, char *args, dns_zone_t **zonep) {
3306         char *input, *ptr;
3307         const char *zonetxt;
3308         char *classtxt;
3309         const char *viewtxt = NULL;
3310         dns_fixedname_t name;
3311         isc_result_t result;
3312         isc_buffer_t buf;
3313         dns_view_t *view = NULL;
3314         dns_rdataclass_t rdclass;
3315
3316         REQUIRE(zonep != NULL && *zonep == NULL);
3317
3318         input = args;
3319
3320         /* Skip the command name. */
3321         ptr = next_token(&input, " \t");
3322         if (ptr == NULL)
3323                 return (ISC_R_UNEXPECTEDEND);
3324
3325         /* Look for the zone name. */
3326         zonetxt = next_token(&input, " \t");
3327         if (zonetxt == NULL)
3328                 return (ISC_R_SUCCESS);
3329
3330         /* Look for the optional class name. */
3331         classtxt = next_token(&input, " \t");
3332         if (classtxt != NULL) {
3333                 /* Look for the optional view name. */
3334                 viewtxt = next_token(&input, " \t");
3335         }
3336
3337         isc_buffer_init(&buf, zonetxt, strlen(zonetxt));
3338         isc_buffer_add(&buf, strlen(zonetxt));
3339         dns_fixedname_init(&name);
3340         result = dns_name_fromtext(dns_fixedname_name(&name),
3341                                    &buf, dns_rootname, ISC_FALSE, NULL);
3342         if (result != ISC_R_SUCCESS)
3343                 goto fail1;
3344
3345         if (classtxt != NULL) {
3346                 isc_textregion_t r;
3347                 r.base = classtxt;
3348                 r.length = strlen(classtxt);
3349                 result = dns_rdataclass_fromtext(&rdclass, &r);
3350                 if (result != ISC_R_SUCCESS)
3351                         goto fail1;
3352         } else {
3353                 rdclass = dns_rdataclass_in;
3354         }
3355
3356         if (viewtxt == NULL)
3357                 viewtxt = "_default";
3358         result = dns_viewlist_find(&server->viewlist, viewtxt,
3359                                    rdclass, &view);
3360         if (result != ISC_R_SUCCESS)
3361                 goto fail1;
3362
3363         result = dns_zt_find(view->zonetable, dns_fixedname_name(&name),
3364                              0, NULL, zonep);
3365         /* Partial match? */
3366         if (result != ISC_R_SUCCESS && *zonep != NULL)
3367                 dns_zone_detach(zonep);
3368         dns_view_detach(&view);
3369  fail1:
3370         return (result);
3371 }
3372
3373 /*
3374  * Act on a "retransfer" command from the command channel.
3375  */
3376 isc_result_t
3377 ns_server_retransfercommand(ns_server_t *server, char *args) {
3378         isc_result_t result;
3379         dns_zone_t *zone = NULL;
3380         dns_zonetype_t type;
3381
3382         result = zone_from_args(server, args, &zone);
3383         if (result != ISC_R_SUCCESS)
3384                 return (result);
3385         if (zone == NULL)
3386                 return (ISC_R_UNEXPECTEDEND);
3387         type = dns_zone_gettype(zone);
3388         if (type == dns_zone_slave || type == dns_zone_stub)
3389                 dns_zone_forcereload(zone);
3390         else
3391                 result = ISC_R_NOTFOUND;
3392         dns_zone_detach(&zone);
3393         return (result);
3394 }
3395
3396 /*
3397  * Act on a "reload" command from the command channel.
3398  */
3399 isc_result_t
3400 ns_server_reloadcommand(ns_server_t *server, char *args, isc_buffer_t *text) {
3401         isc_result_t result;
3402         dns_zone_t *zone = NULL;
3403         dns_zonetype_t type;
3404         const char *msg = NULL;
3405
3406         result = zone_from_args(server, args, &zone);
3407         if (result != ISC_R_SUCCESS)
3408                 return (result);
3409         if (zone == NULL) {
3410                 result = reload(server);
3411                 if (result == ISC_R_SUCCESS)
3412                         msg = "server reload successful";
3413         } else {
3414                 type = dns_zone_gettype(zone);
3415                 if (type == dns_zone_slave || type == dns_zone_stub) {
3416                         dns_zone_refresh(zone);
3417                         msg = "zone refresh queued";
3418                 } else {
3419                         result = dns_zone_load(zone);
3420                         dns_zone_detach(&zone);
3421                         switch (result) {
3422                         case ISC_R_SUCCESS:
3423                                  msg = "zone reload successful";
3424                                  break;
3425                         case DNS_R_CONTINUE:
3426                                 msg = "zone reload queued";
3427                                 result = ISC_R_SUCCESS;
3428                                 break;
3429                         case DNS_R_UPTODATE:
3430                                 msg = "zone reload up-to-date";
3431                                 result = ISC_R_SUCCESS;
3432                                 break;
3433                         default:
3434                                 /* failure message will be generated by rndc */
3435                                 break;
3436                         }
3437                 }
3438         }
3439         if (msg != NULL && strlen(msg) < isc_buffer_availablelength(text))
3440                 isc_buffer_putmem(text, (const unsigned char *)msg,
3441                                   strlen(msg) + 1);
3442         return (result);
3443 }
3444
3445 /*
3446  * Act on a "reconfig" command from the command channel.
3447  */
3448 isc_result_t
3449 ns_server_reconfigcommand(ns_server_t *server, char *args) {
3450         UNUSED(args);
3451
3452         reconfig(server);
3453         return (ISC_R_SUCCESS);
3454 }
3455
3456 /*
3457  * Act on a "refresh" command from the command channel.
3458  */
3459 isc_result_t
3460 ns_server_refreshcommand(ns_server_t *server, char *args, isc_buffer_t *text) {
3461         isc_result_t result;
3462         dns_zone_t *zone = NULL;
3463         const unsigned char msg1[] = "zone refresh queued";
3464         const unsigned char msg2[] = "not a slave or stub zone";
3465         dns_zonetype_t type;
3466
3467         result = zone_from_args(server, args, &zone);
3468         if (result != ISC_R_SUCCESS)
3469                 return (result);
3470         if (zone == NULL)
3471                 return (ISC_R_UNEXPECTEDEND);
3472
3473         type = dns_zone_gettype(zone);
3474         if (type == dns_zone_slave || type == dns_zone_stub) {
3475                 dns_zone_refresh(zone);
3476                 dns_zone_detach(&zone);
3477                 if (sizeof(msg1) <= isc_buffer_availablelength(text))
3478                         isc_buffer_putmem(text, msg1, sizeof(msg1));
3479                 return (ISC_R_SUCCESS);
3480         }
3481
3482         dns_zone_detach(&zone);
3483         if (sizeof(msg2) <= isc_buffer_availablelength(text))
3484                 isc_buffer_putmem(text, msg2, sizeof(msg2));
3485         return (ISC_R_FAILURE);
3486 }
3487
3488 isc_result_t
3489 ns_server_togglequerylog(ns_server_t *server) {
3490         server->log_queries = server->log_queries ? ISC_FALSE : ISC_TRUE;
3491
3492         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3493                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
3494                       "query logging is now %s",
3495                       server->log_queries ? "on" : "off");
3496         return (ISC_R_SUCCESS);
3497 }
3498
3499 static isc_result_t
3500 ns_listenlist_fromconfig(const cfg_obj_t *listenlist, const cfg_obj_t *config,
3501                          ns_aclconfctx_t *actx,
3502                          isc_mem_t *mctx, ns_listenlist_t **target)
3503 {
3504         isc_result_t result;
3505         const cfg_listelt_t *element;
3506         ns_listenlist_t *dlist = NULL;
3507
3508         REQUIRE(target != NULL && *target == NULL);
3509
3510         result = ns_listenlist_create(mctx, &dlist);
3511         if (result != ISC_R_SUCCESS)
3512                 return (result);
3513
3514         for (element = cfg_list_first(listenlist);
3515              element != NULL;
3516              element = cfg_list_next(element))
3517         {
3518                 ns_listenelt_t *delt = NULL;
3519                 const cfg_obj_t *listener = cfg_listelt_value(element);
3520                 result = ns_listenelt_fromconfig(listener, config, actx,
3521                                                  mctx, &delt);
3522                 if (result != ISC_R_SUCCESS)
3523                         goto cleanup;
3524                 ISC_LIST_APPEND(dlist->elts, delt, link);
3525         }
3526         *target = dlist;
3527         return (ISC_R_SUCCESS);
3528
3529  cleanup:
3530         ns_listenlist_detach(&dlist);
3531         return (result);
3532 }
3533
3534 /*
3535  * Create a listen list from the corresponding configuration
3536  * data structure.
3537  */
3538 static isc_result_t
3539 ns_listenelt_fromconfig(const cfg_obj_t *listener, const cfg_obj_t *config,
3540                         ns_aclconfctx_t *actx,
3541                         isc_mem_t *mctx, ns_listenelt_t **target)
3542 {
3543         isc_result_t result;
3544         const cfg_obj_t *portobj;
3545         in_port_t port;
3546         ns_listenelt_t *delt = NULL;
3547         REQUIRE(target != NULL && *target == NULL);
3548
3549         portobj = cfg_tuple_get(listener, "port");
3550         if (!cfg_obj_isuint32(portobj)) {
3551                 if (ns_g_port != 0) {
3552                         port = ns_g_port;
3553                 } else {
3554                         result = ns_config_getport(config, &port);
3555                         if (result != ISC_R_SUCCESS)
3556                                 return (result);
3557                 }
3558         } else {
3559                 if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
3560                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
3561                                     "port value '%u' is out of range",
3562                                     cfg_obj_asuint32(portobj));
3563                         return (ISC_R_RANGE);
3564                 }
3565                 port = (in_port_t)cfg_obj_asuint32(portobj);
3566         }
3567
3568         result = ns_listenelt_create(mctx, port, NULL, &delt);
3569         if (result != ISC_R_SUCCESS)
3570                 return (result);
3571
3572         result = ns_acl_fromconfig(cfg_tuple_get(listener, "acl"),
3573                                    config, actx, mctx, &delt->acl);
3574         if (result != ISC_R_SUCCESS) {
3575                 ns_listenelt_destroy(delt);
3576                 return (result);
3577         }
3578         *target = delt;
3579         return (ISC_R_SUCCESS);
3580 }
3581
3582 isc_result_t
3583 ns_server_dumpstats(ns_server_t *server) {
3584         isc_result_t result;
3585         dns_zone_t *zone, *next;
3586         isc_stdtime_t now;
3587         FILE *fp = NULL;
3588         int i;
3589         int ncounters;
3590
3591         isc_stdtime_get(&now);
3592
3593         CHECKMF(isc_stdio_open(server->statsfile, "a", &fp),
3594                 "could not open statistics dump file", server->statsfile);
3595
3596         ncounters = DNS_STATS_NCOUNTERS;
3597         fprintf(fp, "+++ Statistics Dump +++ (%lu)\n", (unsigned long)now);
3598
3599         for (i = 0; i < ncounters; i++)
3600                 fprintf(fp, "%s %" ISC_PRINT_QUADFORMAT "u\n",
3601                         dns_statscounter_names[i],
3602                         server->querystats[i]);
3603
3604         zone = NULL;
3605         for (result = dns_zone_first(server->zonemgr, &zone);
3606              result == ISC_R_SUCCESS;
3607              next = NULL, result = dns_zone_next(zone, &next), zone = next)
3608         {
3609                 isc_uint64_t *zonestats = dns_zone_getstatscounters(zone);
3610                 if (zonestats != NULL) {
3611                         char zonename[DNS_NAME_FORMATSIZE];
3612                         dns_view_t *view;
3613                         char *viewname;
3614
3615                         dns_name_format(dns_zone_getorigin(zone),
3616                                         zonename, sizeof(zonename));
3617                         view = dns_zone_getview(zone);
3618                         viewname = view->name;
3619                         for (i = 0; i < ncounters; i++) {
3620                                 fprintf(fp, "%s %" ISC_PRINT_QUADFORMAT
3621                                         "u %s",
3622                                         dns_statscounter_names[i],
3623                                         zonestats[i],
3624                                         zonename);
3625                                 if (strcmp(viewname, "_default") != 0)
3626                                         fprintf(fp, " %s", viewname);
3627                                 fprintf(fp, "\n");
3628                         }
3629                 }
3630         }
3631         if (result == ISC_R_NOMORE)
3632                 result = ISC_R_SUCCESS;
3633         CHECK(result);
3634
3635         fprintf(fp, "--- Statistics Dump --- (%lu)\n", (unsigned long)now);
3636
3637  cleanup:
3638         if (fp != NULL)
3639                 (void)isc_stdio_close(fp);
3640         return (result);
3641 }
3642
3643 static isc_result_t
3644 add_zone_tolist(dns_zone_t *zone, void *uap) {
3645         struct dumpcontext *dctx = uap;
3646         struct zonelistentry *zle;
3647
3648         zle = isc_mem_get(dctx->mctx, sizeof *zle);
3649         if (zle ==  NULL)
3650                 return (ISC_R_NOMEMORY);
3651         zle->zone = NULL;
3652         dns_zone_attach(zone, &zle->zone);
3653         ISC_LINK_INIT(zle, link);
3654         ISC_LIST_APPEND(ISC_LIST_TAIL(dctx->viewlist)->zonelist, zle, link);
3655         return (ISC_R_SUCCESS);
3656 }
3657
3658 static isc_result_t
3659 add_view_tolist(struct dumpcontext *dctx, dns_view_t *view) {
3660         struct viewlistentry *vle;
3661         isc_result_t result = ISC_R_SUCCESS;
3662
3663         /*
3664          * Prevent duplicate views.
3665          */
3666         for (vle = ISC_LIST_HEAD(dctx->viewlist);
3667              vle != NULL;
3668              vle = ISC_LIST_NEXT(vle, link))
3669                 if (vle->view == view)
3670                         return (ISC_R_SUCCESS);
3671
3672         vle = isc_mem_get(dctx->mctx, sizeof *vle);
3673         if (vle == NULL)
3674                 return (ISC_R_NOMEMORY);
3675         vle->view = NULL;
3676         dns_view_attach(view, &vle->view);
3677         ISC_LINK_INIT(vle, link);
3678         ISC_LIST_INIT(vle->zonelist);
3679         ISC_LIST_APPEND(dctx->viewlist, vle, link);
3680         if (dctx->dumpzones)
3681                 result = dns_zt_apply(view->zonetable, ISC_TRUE,
3682                                       add_zone_tolist, dctx);
3683         return (result);
3684 }
3685
3686 static void
3687 dumpcontext_destroy(struct dumpcontext *dctx) {
3688         struct viewlistentry *vle;
3689         struct zonelistentry *zle;
3690
3691         vle = ISC_LIST_HEAD(dctx->viewlist);
3692         while (vle != NULL) {
3693                 ISC_LIST_UNLINK(dctx->viewlist, vle, link);
3694                 zle = ISC_LIST_HEAD(vle->zonelist);
3695                 while (zle != NULL) {
3696                         ISC_LIST_UNLINK(vle->zonelist, zle, link);
3697                         dns_zone_detach(&zle->zone);
3698                         isc_mem_put(dctx->mctx, zle, sizeof *zle);
3699                         zle = ISC_LIST_HEAD(vle->zonelist);
3700                 }
3701                 dns_view_detach(&vle->view);
3702                 isc_mem_put(dctx->mctx, vle, sizeof *vle);
3703                 vle = ISC_LIST_HEAD(dctx->viewlist);
3704         }
3705         if (dctx->version != NULL)
3706                 dns_db_closeversion(dctx->db, &dctx->version, ISC_FALSE);
3707         if (dctx->db != NULL)
3708                 dns_db_detach(&dctx->db);
3709         if (dctx->cache != NULL)
3710                 dns_db_detach(&dctx->cache);
3711         if (dctx->task != NULL)
3712                 isc_task_detach(&dctx->task);
3713         if (dctx->fp != NULL)
3714                 (void)isc_stdio_close(dctx->fp);
3715         if (dctx->mdctx != NULL)
3716                 dns_dumpctx_detach(&dctx->mdctx);
3717         isc_mem_put(dctx->mctx, dctx, sizeof *dctx);
3718 }
3719
3720 static void
3721 dumpdone(void *arg, isc_result_t result) {
3722         struct dumpcontext *dctx = arg;
3723         char buf[1024+32];
3724         const dns_master_style_t *style;
3725
3726         if (result != ISC_R_SUCCESS)
3727                 goto cleanup;
3728         if (dctx->mdctx != NULL)
3729                 dns_dumpctx_detach(&dctx->mdctx);
3730         if (dctx->view == NULL) {
3731                 dctx->view = ISC_LIST_HEAD(dctx->viewlist);
3732                 if (dctx->view == NULL)
3733                         goto done;
3734                 INSIST(dctx->zone == NULL);
3735         } else
3736                 goto resume;
3737  nextview:
3738         fprintf(dctx->fp, ";\n; Start view %s\n;\n", dctx->view->view->name);
3739  resume:
3740         if (dctx->zone == NULL && dctx->cache == NULL && dctx->dumpcache) {
3741                 style = &dns_master_style_cache;
3742                 /* start cache dump */
3743                 if (dctx->view->view->cachedb != NULL)
3744                         dns_db_attach(dctx->view->view->cachedb, &dctx->cache);
3745                 if (dctx->cache != NULL) {
3746
3747                         fprintf(dctx->fp, ";\n; Cache dump of view '%s'\n;\n",
3748                                 dctx->view->view->name);
3749                         result = dns_master_dumptostreaminc(dctx->mctx,
3750                                                             dctx->cache, NULL,
3751                                                             style, dctx->fp,
3752                                                             dctx->task,
3753                                                             dumpdone, dctx,
3754                                                             &dctx->mdctx);
3755                         if (result == DNS_R_CONTINUE)
3756                                 return;
3757                         if (result == ISC_R_NOTIMPLEMENTED)
3758                                 fprintf(dctx->fp, "; %s\n",
3759                                         dns_result_totext(result));
3760                         else if (result != ISC_R_SUCCESS)
3761                                 goto cleanup;
3762                 }
3763         }
3764         if (dctx->cache != NULL) {
3765                 dns_adb_dump(dctx->view->view->adb, dctx->fp);
3766                 dns_db_detach(&dctx->cache);
3767         }
3768         if (dctx->dumpzones) {
3769                 style = &dns_master_style_full;
3770  nextzone:
3771                 if (dctx->version != NULL)
3772                         dns_db_closeversion(dctx->db, &dctx->version,
3773                                             ISC_FALSE);
3774                 if (dctx->db != NULL)
3775                         dns_db_detach(&dctx->db);
3776                 if (dctx->zone == NULL)
3777                         dctx->zone = ISC_LIST_HEAD(dctx->view->zonelist);
3778                 else
3779                         dctx->zone = ISC_LIST_NEXT(dctx->zone, link);
3780                 if (dctx->zone != NULL) {
3781                         /* start zone dump */
3782                         dns_zone_name(dctx->zone->zone, buf, sizeof(buf));
3783                         fprintf(dctx->fp, ";\n; Zone dump of '%s'\n;\n", buf);
3784                         result = dns_zone_getdb(dctx->zone->zone, &dctx->db);
3785                         if (result != ISC_R_SUCCESS) {
3786                                 fprintf(dctx->fp, "; %s\n",
3787                                         dns_result_totext(result));
3788                                 goto nextzone;
3789                         }
3790                         dns_db_currentversion(dctx->db, &dctx->version);
3791                         result = dns_master_dumptostreaminc(dctx->mctx,
3792                                                             dctx->db,
3793                                                             dctx->version,
3794                                                             style, dctx->fp,
3795                                                             dctx->task,
3796                                                             dumpdone, dctx,
3797                                                             &dctx->mdctx);
3798                         if (result == DNS_R_CONTINUE)
3799                                 return;
3800                         if (result == ISC_R_NOTIMPLEMENTED) {
3801                                 fprintf(dctx->fp, "; %s\n",
3802                                         dns_result_totext(result));
3803                                 result = ISC_R_SUCCESS;
3804                                 goto nextzone;
3805                         }
3806                         if (result != ISC_R_SUCCESS)
3807                                 goto cleanup;
3808                 }
3809         }
3810         if (dctx->view != NULL)
3811                 dctx->view = ISC_LIST_NEXT(dctx->view, link);
3812         if (dctx->view != NULL)
3813                 goto nextview;
3814  done:
3815         fprintf(dctx->fp, "; Dump complete\n");
3816         result = isc_stdio_flush(dctx->fp);
3817         if (result == ISC_R_SUCCESS)
3818                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3819                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
3820                               "dumpdb complete");
3821  cleanup:
3822         if (result != ISC_R_SUCCESS)
3823                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3824                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
3825                               "dumpdb failed: %s", dns_result_totext(result));
3826         dumpcontext_destroy(dctx);
3827 }
3828
3829 isc_result_t
3830 ns_server_dumpdb(ns_server_t *server, char *args) {
3831         struct dumpcontext *dctx = NULL;
3832         dns_view_t *view;
3833         isc_result_t result;
3834         char *ptr;
3835         const char *sep;
3836
3837         /* Skip the command name. */
3838         ptr = next_token(&args, " \t");
3839         if (ptr == NULL)
3840                 return (ISC_R_UNEXPECTEDEND);
3841
3842         dctx = isc_mem_get(server->mctx, sizeof(*dctx));
3843         if (dctx == NULL)
3844                 return (ISC_R_NOMEMORY);
3845
3846         dctx->mctx = server->mctx;
3847         dctx->dumpcache = ISC_TRUE;
3848         dctx->dumpzones = ISC_FALSE;
3849         dctx->fp = NULL;
3850         ISC_LIST_INIT(dctx->viewlist);
3851         dctx->view = NULL;
3852         dctx->zone = NULL;
3853         dctx->cache = NULL;
3854         dctx->mdctx = NULL;
3855         dctx->db = NULL;
3856         dctx->cache = NULL;
3857         dctx->task = NULL;
3858         dctx->version = NULL;
3859         isc_task_attach(server->task, &dctx->task);
3860
3861         CHECKMF(isc_stdio_open(server->dumpfile, "w", &dctx->fp),
3862                 "could not open dump file", server->dumpfile);
3863
3864         sep = (args == NULL) ? "" : ": ";
3865         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3866                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
3867                       "dumpdb started%s%s", sep, (args != NULL) ? args : "");
3868
3869         ptr = next_token(&args, " \t");
3870         if (ptr != NULL && strcmp(ptr, "-all") == 0) {
3871                 dctx->dumpzones = ISC_TRUE;
3872                 dctx->dumpcache = ISC_TRUE;
3873                 ptr = next_token(&args, " \t");
3874         } else if (ptr != NULL && strcmp(ptr, "-cache") == 0) {
3875                 dctx->dumpzones = ISC_FALSE;
3876                 dctx->dumpcache = ISC_TRUE;
3877                 ptr = next_token(&args, " \t");
3878         } else if (ptr != NULL && strcmp(ptr, "-zones") == 0) {
3879                 dctx->dumpzones = ISC_TRUE;
3880                 dctx->dumpcache = ISC_FALSE;
3881                 ptr = next_token(&args, " \t");
3882         }
3883
3884  nextview:
3885         for (view = ISC_LIST_HEAD(server->viewlist);
3886              view != NULL;
3887              view = ISC_LIST_NEXT(view, link))
3888         {
3889                 if (ptr != NULL && strcmp(view->name, ptr) != 0)
3890                         continue;
3891                 CHECK(add_view_tolist(dctx, view));
3892         }
3893         if (ptr != NULL) {
3894                 ptr = next_token(&args, " \t");
3895                 if (ptr != NULL)
3896                         goto nextview;
3897         }
3898         dumpdone(dctx, ISC_R_SUCCESS);
3899         return (ISC_R_SUCCESS);
3900
3901  cleanup:
3902         if (dctx != NULL)
3903                 dumpcontext_destroy(dctx);
3904         return (result);
3905 }
3906
3907 isc_result_t
3908 ns_server_dumprecursing(ns_server_t *server) {
3909         FILE *fp = NULL;
3910         isc_result_t result;
3911
3912         CHECKMF(isc_stdio_open(server->recfile, "w", &fp),
3913                 "could not open dump file", server->recfile);
3914         fprintf(fp,";\n; Recursing Queries\n;\n");
3915         ns_interfacemgr_dumprecursing(fp, server->interfacemgr);
3916         fprintf(fp, "; Dump complete\n");
3917
3918  cleanup:
3919         if (fp != NULL)
3920                 result = isc_stdio_close(fp);
3921         return (result);
3922 }
3923
3924 isc_result_t
3925 ns_server_setdebuglevel(ns_server_t *server, char *args) {
3926         char *ptr;
3927         char *levelstr;
3928         char *endp;
3929         long newlevel;
3930
3931         UNUSED(server);
3932
3933         /* Skip the command name. */
3934         ptr = next_token(&args, " \t");
3935         if (ptr == NULL)
3936                 return (ISC_R_UNEXPECTEDEND);
3937
3938         /* Look for the new level name. */
3939         levelstr = next_token(&args, " \t");
3940         if (levelstr == NULL) {
3941                 if (ns_g_debuglevel < 99)
3942                         ns_g_debuglevel++;
3943         } else {
3944                 newlevel = strtol(levelstr, &endp, 10);
3945                 if (*endp != '\0' || newlevel < 0 || newlevel > 99)
3946                         return (ISC_R_RANGE);
3947                 ns_g_debuglevel = (unsigned int)newlevel;
3948         }
3949         isc_log_setdebuglevel(ns_g_lctx, ns_g_debuglevel);
3950         return (ISC_R_SUCCESS);
3951 }
3952
3953 isc_result_t
3954 ns_server_flushcache(ns_server_t *server, char *args) {
3955         char *ptr, *viewname;
3956         dns_view_t *view;
3957         isc_boolean_t flushed = ISC_FALSE;
3958         isc_result_t result;
3959
3960         /* Skip the command name. */
3961         ptr = next_token(&args, " \t");
3962         if (ptr == NULL)
3963                 return (ISC_R_UNEXPECTEDEND);
3964
3965         /* Look for the view name. */
3966         viewname = next_token(&args, " \t");
3967
3968         result = isc_task_beginexclusive(server->task);
3969         RUNTIME_CHECK(result == ISC_R_SUCCESS);
3970         for (view = ISC_LIST_HEAD(server->viewlist);
3971              view != NULL;
3972              view = ISC_LIST_NEXT(view, link))
3973         {
3974                 if (viewname != NULL && strcasecmp(viewname, view->name) != 0)
3975                         continue;
3976                 result = dns_view_flushcache(view);
3977                 if (result != ISC_R_SUCCESS)
3978                         goto out;
3979                 flushed = ISC_TRUE;
3980         }
3981         if (flushed)
3982                 result = ISC_R_SUCCESS;
3983         else
3984                 result = ISC_R_FAILURE;
3985  out:
3986         isc_task_endexclusive(server->task);
3987         return (result);
3988 }
3989
3990 isc_result_t
3991 ns_server_flushname(ns_server_t *server, char *args) {
3992         char *ptr, *target, *viewname;
3993         dns_view_t *view;
3994         isc_boolean_t flushed = ISC_FALSE;
3995         isc_result_t result;
3996         isc_buffer_t b;
3997         dns_fixedname_t fixed;
3998         dns_name_t *name;
3999
4000         /* Skip the command name. */
4001         ptr = next_token(&args, " \t");
4002         if (ptr == NULL)
4003                 return (ISC_R_UNEXPECTEDEND);
4004
4005         /* Find the domain name to flush. */
4006         target = next_token(&args, " \t");
4007         if (target == NULL)
4008                 return (ISC_R_UNEXPECTEDEND);
4009
4010         isc_buffer_init(&b, target, strlen(target));
4011         isc_buffer_add(&b, strlen(target));
4012         dns_fixedname_init(&fixed);
4013         name = dns_fixedname_name(&fixed);
4014         result = dns_name_fromtext(name, &b, dns_rootname, ISC_FALSE, NULL);
4015         if (result != ISC_R_SUCCESS)
4016                 return (result);
4017
4018         /* Look for the view name. */
4019         viewname = next_token(&args, " \t");
4020
4021         result = isc_task_beginexclusive(server->task);
4022         RUNTIME_CHECK(result == ISC_R_SUCCESS);
4023         flushed = ISC_TRUE;
4024         for (view = ISC_LIST_HEAD(server->viewlist);
4025              view != NULL;
4026              view = ISC_LIST_NEXT(view, link))
4027         {
4028                 if (viewname != NULL && strcasecmp(viewname, view->name) != 0)
4029                         continue;
4030                 result = dns_view_flushname(view, name);
4031                 if (result != ISC_R_SUCCESS)
4032                         flushed = ISC_FALSE;
4033         }
4034         if (flushed)
4035                 result = ISC_R_SUCCESS;
4036         else
4037                 result = ISC_R_FAILURE;
4038         isc_task_endexclusive(server->task);
4039         return (result);
4040 }
4041
4042 isc_result_t
4043 ns_server_status(ns_server_t *server, isc_buffer_t *text) {
4044         int zonecount, xferrunning, xferdeferred, soaqueries;
4045         unsigned int n;
4046
4047         zonecount = dns_zonemgr_getcount(server->zonemgr, DNS_ZONESTATE_ANY);
4048         xferrunning = dns_zonemgr_getcount(server->zonemgr,
4049                                            DNS_ZONESTATE_XFERRUNNING);
4050         xferdeferred = dns_zonemgr_getcount(server->zonemgr,
4051                                             DNS_ZONESTATE_XFERDEFERRED);
4052         soaqueries = dns_zonemgr_getcount(server->zonemgr,
4053                                           DNS_ZONESTATE_SOAQUERY);
4054         n = snprintf((char *)isc_buffer_used(text),
4055                      isc_buffer_availablelength(text),
4056                      "number of zones: %u\n"
4057                      "debug level: %d\n"
4058                      "xfers running: %u\n"
4059                      "xfers deferred: %u\n"
4060                      "soa queries in progress: %u\n"
4061                      "query logging is %s\n"
4062                      "recursive clients: %d/%d\n"
4063                      "tcp clients: %d/%d\n"
4064                      "server is up and running",
4065                      zonecount, ns_g_debuglevel, xferrunning, xferdeferred,
4066                      soaqueries, server->log_queries ? "ON" : "OFF",
4067                      server->recursionquota.used, server->recursionquota.max,
4068                      server->tcpquota.used, server->tcpquota.max);
4069         if (n >= isc_buffer_availablelength(text))
4070                 return (ISC_R_NOSPACE);
4071         isc_buffer_add(text, n);
4072         return (ISC_R_SUCCESS);
4073 }
4074
4075 /*
4076  * Act on a "freeze" or "unfreeze" command from the command channel.
4077  */
4078 isc_result_t
4079 ns_server_freeze(ns_server_t *server, isc_boolean_t freeze, char *args) {
4080         isc_result_t result;
4081         dns_zone_t *zone = NULL;
4082         dns_zonetype_t type;
4083         char classstr[DNS_RDATACLASS_FORMATSIZE];
4084         char zonename[DNS_NAME_FORMATSIZE];
4085         dns_view_t *view;
4086         char *journal;
4087         const char *vname, *sep;
4088         isc_boolean_t frozen;
4089
4090         result = zone_from_args(server, args, &zone);
4091         if (result != ISC_R_SUCCESS)
4092                 return (result);
4093         if (zone == NULL)
4094                 return (ISC_R_UNEXPECTEDEND);
4095         type = dns_zone_gettype(zone);
4096         if (type != dns_zone_master) {
4097                 dns_zone_detach(&zone);
4098                 return (ISC_R_NOTFOUND);
4099         }
4100
4101         frozen = dns_zone_getupdatedisabled(zone);
4102         if (freeze) {
4103                 if (frozen)
4104                         result = DNS_R_FROZEN;
4105                 if (result == ISC_R_SUCCESS)
4106                         result = dns_zone_flush(zone);
4107                 if (result == ISC_R_SUCCESS) {
4108                         journal = dns_zone_getjournal(zone);
4109                         if (journal != NULL)
4110                                 (void)isc_file_remove(journal);
4111                 }
4112         } else {
4113                 if (frozen) {
4114                         result = dns_zone_load(zone);
4115                         if (result == DNS_R_CONTINUE ||
4116                             result == DNS_R_UPTODATE)
4117                                 result = ISC_R_SUCCESS;
4118                 }
4119         }
4120         if (result == ISC_R_SUCCESS)
4121                 dns_zone_setupdatedisabled(zone, freeze);
4122
4123         view = dns_zone_getview(zone);
4124         if (strcmp(view->name, "_bind") == 0 ||
4125             strcmp(view->name, "_default") == 0)
4126         {
4127                 vname = "";
4128                 sep = "";
4129         } else {
4130                 vname = view->name;
4131                 sep = " ";
4132         }
4133         dns_rdataclass_format(dns_zone_getclass(zone), classstr,
4134                               sizeof(classstr));
4135         dns_name_format(dns_zone_getorigin(zone),
4136                         zonename, sizeof(zonename));
4137         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4138                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4139                       "%s zone '%s/%s'%s%s: %s",
4140                       freeze ? "freezing" : "unfreezing",
4141                       zonename, classstr, sep, vname,
4142                       isc_result_totext(result));
4143         dns_zone_detach(&zone);
4144         return (result);
4145 }
4146
4147 #ifdef HAVE_LIBSCF
4148 /*
4149  * This function adds a message for rndc to echo if named
4150  * is managed by smf and is also running chroot.
4151  */
4152 isc_result_t
4153 ns_smf_add_message(isc_buffer_t *text) {
4154         unsigned int n;
4155
4156         n = snprintf((char *)isc_buffer_used(text),
4157                 isc_buffer_availablelength(text),
4158                 "use svcadm(1M) to manage named");
4159         if (n >= isc_buffer_availablelength(text))
4160                 return (ISC_R_NOSPACE);
4161         isc_buffer_add(text, n);
4162         return (ISC_R_SUCCESS);
4163 }
4164 #endif /* HAVE_LIBSCF */