contrib/bind9/bin/named/server.c

   1 /*
   2  * Copyright (C) 2004-2012  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1999-2003  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15  * PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* $Id: server.c,v 1.599.8.19 2012/02/22 00:33:32 each Exp $ */
  19
  20 /*! \file */
  21
  22 #include <config.h>
  23
  24 #include <stdlib.h>
  25 #include <unistd.h>
  26 #include <limits.h>
  27 #include <ctype.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30
  31 #include <isc/app.h>
  32 #include <isc/base64.h>
  33 #include <isc/dir.h>
  34 #include <isc/entropy.h>
  35 #include <isc/file.h>
  36 #include <isc/hash.h>
  37 #include <isc/httpd.h>
  38 #include <isc/lex.h>
  39 #include <isc/parseint.h>
  40 #include <isc/portset.h>
  41 #include <isc/print.h>
  42 #include <isc/resource.h>
  43 #include <isc/sha2.h>
  44 #include <isc/socket.h>
  45 #include <isc/stat.h>
  46 #include <isc/stats.h>
  47 #include <isc/stdio.h>
  48 #include <isc/string.h>
  49 #include <isc/task.h>
  50 #include <isc/timer.h>
  51 #include <isc/util.h>
  52 #include <isc/xml.h>
  53
  54 #include <isccfg/namedconf.h>
  55
  56 #include <bind9/check.h>
  57
  58 #include <dns/acache.h>
  59 #include <dns/adb.h>
  60 #include <dns/cache.h>
  61 #include <dns/db.h>
  62 #include <dns/dispatch.h>
  63 #include <dns/dlz.h>
  64 #include <dns/dns64.h>
  65 #include <dns/forward.h>
  66 #include <dns/journal.h>
  67 #include <dns/keytable.h>
  68 #include <dns/keyvalues.h>
  69 #include <dns/lib.h>
  70 #include <dns/master.h>
  71 #include <dns/masterdump.h>
  72 #include <dns/order.h>
  73 #include <dns/peer.h>
  74 #include <dns/portlist.h>
  75 #include <dns/rbt.h>
  76 #include <dns/rdataclass.h>
  77 #include <dns/rdataset.h>
  78 #include <dns/rdatastruct.h>
  79 #include <dns/resolver.h>
  80 #include <dns/rootns.h>
  81 #include <dns/secalg.h>
  82 #include <dns/stats.h>
  83 #include <dns/tkey.h>
  84 #include <dns/tsig.h>
  85 #include <dns/view.h>
  86 #include <dns/zone.h>
  87 #include <dns/zt.h>
  88
  89 #include <dst/dst.h>
  90 #include <dst/result.h>
  91
  92 #include <named/client.h>
  93 #include <named/config.h>
  94 #include <named/control.h>
  95 #include <named/interfacemgr.h>
  96 #include <named/log.h>
  97 #include <named/logconf.h>
  98 #include <named/lwresd.h>
  99 #include <named/main.h>
 100 #include <named/os.h>
 101 #include <named/server.h>
 102 #include <named/statschannel.h>
 103 #include <named/tkeyconf.h>
 104 #include <named/tsigconf.h>
 105 #include <named/zoneconf.h>
 106 #ifdef HAVE_LIBSCF
 107 #include <named/ns_smf_globals.h>
 108 #include <stdlib.h>
 109 #endif
 110
 111 #ifndef PATH_MAX
 112 #define PATH_MAX 1024
 113 #endif
 114
 115 /*%
 116  * Check an operation for failure.  Assumes that the function
 117  * using it has a 'result' variable and a 'cleanup' label.
 118  */
 119 #define CHECK(op) \
 120         do { result = (op);                                      \
 121                if (result != ISC_R_SUCCESS) goto cleanup;        \
 122         } while (0)
 123
 124 #define CHECKM(op, msg) \
 125         do { result = (op);                                       \
 126                if (result != ISC_R_SUCCESS) {                     \
 127                         isc_log_write(ns_g_lctx,                  \
 128                                       NS_LOGCATEGORY_GENERAL,     \
 129                                       NS_LOGMODULE_SERVER,        \
 130                                       ISC_LOG_ERROR,              \
 131                                       "%s: %s", msg,              \
 132                                       isc_result_totext(result)); \
 133                         goto cleanup;                             \
 134                 }                                                 \
 135         } while (0)                                               \
 136
 137 #define CHECKMF(op, msg, file) \
 138         do { result = (op);                                       \
 139                if (result != ISC_R_SUCCESS) {                     \
 140                         isc_log_write(ns_g_lctx,                  \
 141                                       NS_LOGCATEGORY_GENERAL,     \
 142                                       NS_LOGMODULE_SERVER,        \
 143                                       ISC_LOG_ERROR,              \
 144                                       "%s '%s': %s", msg, file,   \
 145                                       isc_result_totext(result)); \
 146                         goto cleanup;                             \
 147                 }                                                 \
 148         } while (0)                                               \
 149
 150 #define CHECKFATAL(op, msg) \
 151         do { result = (op);                                       \
 152                if (result != ISC_R_SUCCESS)                       \
 153                         fatal(msg, result);                       \
 154         } while (0)                                               \
 155
 156 /*%
 157  * Maximum ADB size for views that share a cache.  Use this limit to suppress
 158  * the total of memory footprint, which should be the main reason for sharing
 159  * a cache.  Only effective when a finite max-cache-size is specified.
 160  * This is currently defined to be 8MB.
 161  */
 162 #define MAX_ADB_SIZE_FOR_CACHESHARE     8388608
 163
 164 struct ns_dispatch {
 165         isc_sockaddr_t                  addr;
 166         unsigned int                    dispatchgen;
 167         dns_dispatch_t                  *dispatch;
 168         ISC_LINK(struct ns_dispatch)    link;
 169 };
 170
 171 struct ns_cache {
 172         dns_cache_t                     *cache;
 173         dns_view_t                      *primaryview;
 174         isc_boolean_t                   needflush;
 175         isc_boolean_t                   adbsizeadjusted;
 176         ISC_LINK(ns_cache_t)            link;
 177 };
 178
 179 struct dumpcontext {
 180         isc_mem_t                       *mctx;
 181         isc_boolean_t                   dumpcache;
 182         isc_boolean_t                   dumpzones;
 183         FILE                            *fp;
 184         ISC_LIST(struct viewlistentry)  viewlist;
 185         struct viewlistentry            *view;
 186         struct zonelistentry            *zone;
 187         dns_dumpctx_t                   *mdctx;
 188         dns_db_t                        *db;
 189         dns_db_t                        *cache;
 190         isc_task_t                      *task;
 191         dns_dbversion_t                 *version;
 192 };
 193
 194 struct viewlistentry {
 195         dns_view_t                      *view;
 196         ISC_LINK(struct viewlistentry)  link;
 197         ISC_LIST(struct zonelistentry)  zonelist;
 198 };
 199
 200 struct zonelistentry {
 201         dns_zone_t                      *zone;
 202         ISC_LINK(struct zonelistentry)  link;
 203 };
 204
 205 /*%
 206  * Configuration context to retain for each view that allows
 207  * new zones to be added at runtime.
 208  */
 209 struct cfg_context {
 210         isc_mem_t *                     mctx;
 211         cfg_parser_t *                  parser;
 212         cfg_obj_t *                     config;
 213         cfg_parser_t *                  nzparser;
 214         cfg_obj_t *                     nzconfig;
 215         cfg_aclconfctx_t *              actx;
 216 };
 217
 218 /*
 219  * These zones should not leak onto the Internet.
 220  */
 221 static const struct {
 222         const char      *zone;
 223         isc_boolean_t   rfc1918;
 224 } empty_zones[] = {
 225         /* RFC 1918 */
 226         { "10.IN-ADDR.ARPA", ISC_TRUE },
 227         { "16.172.IN-ADDR.ARPA", ISC_TRUE },
 228         { "17.172.IN-ADDR.ARPA", ISC_TRUE },
 229         { "18.172.IN-ADDR.ARPA", ISC_TRUE },
 230         { "19.172.IN-ADDR.ARPA", ISC_TRUE },
 231         { "20.172.IN-ADDR.ARPA", ISC_TRUE },
 232         { "21.172.IN-ADDR.ARPA", ISC_TRUE },
 233         { "22.172.IN-ADDR.ARPA", ISC_TRUE },
 234         { "23.172.IN-ADDR.ARPA", ISC_TRUE },
 235         { "24.172.IN-ADDR.ARPA", ISC_TRUE },
 236         { "25.172.IN-ADDR.ARPA", ISC_TRUE },
 237         { "26.172.IN-ADDR.ARPA", ISC_TRUE },
 238         { "27.172.IN-ADDR.ARPA", ISC_TRUE },
 239         { "28.172.IN-ADDR.ARPA", ISC_TRUE },
 240         { "29.172.IN-ADDR.ARPA", ISC_TRUE },
 241         { "30.172.IN-ADDR.ARPA", ISC_TRUE },
 242         { "31.172.IN-ADDR.ARPA", ISC_TRUE },
 243         { "168.192.IN-ADDR.ARPA", ISC_TRUE },
 244
 245         /* RFC 5735 and RFC 5737 */
 246         { "0.IN-ADDR.ARPA", ISC_FALSE },        /* THIS NETWORK */
 247         { "127.IN-ADDR.ARPA", ISC_FALSE },      /* LOOPBACK */
 248         { "254.169.IN-ADDR.ARPA", ISC_FALSE },  /* LINK LOCAL */
 249         { "2.0.192.IN-ADDR.ARPA", ISC_FALSE },  /* TEST NET */
 250         { "100.51.198.IN-ADDR.ARPA", ISC_FALSE },       /* TEST NET 2 */
 251         { "113.0.203.IN-ADDR.ARPA", ISC_FALSE },        /* TEST NET 3 */
 252         { "255.255.255.255.IN-ADDR.ARPA", ISC_FALSE },  /* BROADCAST */
 253
 254         /* Local IPv6 Unicast Addresses */
 255         { "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.IP6.ARPA", ISC_FALSE },
 256         { "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.IP6.ARPA", ISC_FALSE },
 257         /* LOCALLY ASSIGNED LOCAL ADDRESS SCOPE */
 258         { "D.F.IP6.ARPA", ISC_FALSE },
 259         { "8.E.F.IP6.ARPA", ISC_FALSE },        /* LINK LOCAL */
 260         { "9.E.F.IP6.ARPA", ISC_FALSE },        /* LINK LOCAL */
 261         { "A.E.F.IP6.ARPA", ISC_FALSE },        /* LINK LOCAL */
 262         { "B.E.F.IP6.ARPA", ISC_FALSE },        /* LINK LOCAL */
 263
 264         /* Example Prefix, RFC 3849. */
 265         { "8.B.D.0.1.0.0.2.IP6.ARPA", ISC_FALSE },
 266
 267         { NULL, ISC_FALSE }
 268 };
 269
 270 ISC_PLATFORM_NORETURN_PRE static void
 271 fatal(const char *msg, isc_result_t result) ISC_PLATFORM_NORETURN_POST;
 272
 273 static void
 274 ns_server_reload(isc_task_t *task, isc_event_t *event);
 275
 276 static isc_result_t
 277 ns_listenelt_fromconfig(const cfg_obj_t *listener, const cfg_obj_t *config,
 278                         cfg_aclconfctx_t *actx,
 279                         isc_mem_t *mctx, ns_listenelt_t **target);
 280 static isc_result_t
 281 ns_listenlist_fromconfig(const cfg_obj_t *listenlist, const cfg_obj_t *config,
 282                          cfg_aclconfctx_t *actx,
 283                          isc_mem_t *mctx, ns_listenlist_t **target);
 284
 285 static isc_result_t
 286 configure_forward(const cfg_obj_t *config, dns_view_t *view, dns_name_t *origin,
 287                   const cfg_obj_t *forwarders, const cfg_obj_t *forwardtype);
 288
 289 static isc_result_t
 290 configure_alternates(const cfg_obj_t *config, dns_view_t *view,
 291                      const cfg_obj_t *alternates);
 292
 293 static isc_result_t
 294 configure_zone(const cfg_obj_t *config, const cfg_obj_t *zconfig,
 295                const cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
 296                cfg_aclconfctx_t *aclconf, isc_boolean_t added);
 297
 298 static isc_result_t
 299 add_keydata_zone(dns_view_t *view, const char *directory, isc_mem_t *mctx);
 300
 301 static void
 302 end_reserved_dispatches(ns_server_t *server, isc_boolean_t all);
 303
 304 static void
 305 newzone_cfgctx_destroy(void **cfgp);
 306
 307 /*%
 308  * Configure a single view ACL at '*aclp'.  Get its configuration from
 309  * 'vconfig' (for per-view configuration) and maybe from 'config'
 310  */
 311 static isc_result_t
 312 configure_view_acl(const cfg_obj_t *vconfig, const cfg_obj_t *config,
 313                    const char *aclname, const char *acltuplename,
 314                    cfg_aclconfctx_t *actx, isc_mem_t *mctx, dns_acl_t **aclp)
 315 {
 316         isc_result_t result;
 317         const cfg_obj_t *maps[3];
 318         const cfg_obj_t *aclobj = NULL;
 319         int i = 0;
 320
 321         if (*aclp != NULL)
 322                 dns_acl_detach(aclp);
 323         if (vconfig != NULL)
 324                 maps[i++] = cfg_tuple_get(vconfig, "options");
 325         if (config != NULL) {
 326                 const cfg_obj_t *options = NULL;
 327                 (void)cfg_map_get(config, "options", &options);
 328                 if (options != NULL)
 329                         maps[i++] = options;
 330         }
 331         maps[i] = NULL;
 332
 333         (void)ns_config_get(maps, aclname, &aclobj);
 334         if (aclobj == NULL)
 335                 /*
 336                  * No value available.  *aclp == NULL.
 337                  */
 338                 return (ISC_R_SUCCESS);
 339
 340         if (acltuplename != NULL) {
 341                 /*
 342                  * If the ACL is given in an optional tuple, retrieve it.
 343                  * The parser should have ensured that a valid object be
 344                  * returned.
 345                  */
 346                 aclobj = cfg_tuple_get(aclobj, acltuplename);
 347         }
 348
 349         result = cfg_acl_fromconfig(aclobj, config, ns_g_lctx,
 350                                     actx, mctx, 0, aclp);
 351
 352         return (result);
 353 }
 354
 355 /*%
 356  * Configure a sortlist at '*aclp'.  Essentially the same as
 357  * configure_view_acl() except it calls cfg_acl_fromconfig with a
 358  * nest_level value of 2.
 359  */
 360 static isc_result_t
 361 configure_view_sortlist(const cfg_obj_t *vconfig, const cfg_obj_t *config,
 362                         cfg_aclconfctx_t *actx, isc_mem_t *mctx,
 363                         dns_acl_t **aclp)
 364 {
 365         isc_result_t result;
 366         const cfg_obj_t *maps[3];
 367         const cfg_obj_t *aclobj = NULL;
 368         int i = 0;
 369
 370         if (*aclp != NULL)
 371                 dns_acl_detach(aclp);
 372         if (vconfig != NULL)
 373                 maps[i++] = cfg_tuple_get(vconfig, "options");
 374         if (config != NULL) {
 375                 const cfg_obj_t *options = NULL;
 376                 (void)cfg_map_get(config, "options", &options);
 377                 if (options != NULL)
 378                         maps[i++] = options;
 379         }
 380         maps[i] = NULL;
 381
 382         (void)ns_config_get(maps, "sortlist", &aclobj);
 383         if (aclobj == NULL)
 384                 return (ISC_R_SUCCESS);
 385
 386         /*
 387          * Use a nest level of 3 for the "top level" of the sortlist;
 388          * this means each entry in the top three levels will be stored
 389          * as lists of separate, nested ACLs, rather than merged together
 390          * into IP tables as is usually done with ACLs.
 391          */
 392         result = cfg_acl_fromconfig(aclobj, config, ns_g_lctx,
 393                                     actx, mctx, 3, aclp);
 394
 395         return (result);
 396 }
 397
 398 static isc_result_t
 399 configure_view_nametable(const cfg_obj_t *vconfig, const cfg_obj_t *config,
 400                          const char *confname, const char *conftuplename,
 401                          isc_mem_t *mctx, dns_rbt_t **rbtp)
 402 {
 403         isc_result_t result;
 404         const cfg_obj_t *maps[3];
 405         const cfg_obj_t *obj = NULL;
 406         const cfg_listelt_t *element;
 407         int i = 0;
 408         dns_fixedname_t fixed;
 409         dns_name_t *name;
 410         isc_buffer_t b;
 411         const char *str;
 412         const cfg_obj_t *nameobj;
 413
 414         if (*rbtp != NULL)
 415                 dns_rbt_destroy(rbtp);
 416         if (vconfig != NULL)
 417                 maps[i++] = cfg_tuple_get(vconfig, "options");
 418         if (config != NULL) {
 419                 const cfg_obj_t *options = NULL;
 420                 (void)cfg_map_get(config, "options", &options);
 421                 if (options != NULL)
 422                         maps[i++] = options;
 423         }
 424         maps[i] = NULL;
 425
 426         (void)ns_config_get(maps, confname, &obj);
 427         if (obj == NULL)
 428                 /*
 429                  * No value available.  *rbtp == NULL.
 430                  */
 431                 return (ISC_R_SUCCESS);
 432
 433         if (conftuplename != NULL) {
 434                 obj = cfg_tuple_get(obj, conftuplename);
 435                 if (cfg_obj_isvoid(obj))
 436                         return (ISC_R_SUCCESS);
 437         }
 438
 439         result = dns_rbt_create(mctx, NULL, NULL, rbtp);
 440         if (result != ISC_R_SUCCESS)
 441                 return (result);
 442
 443         dns_fixedname_init(&fixed);
 444         name = dns_fixedname_name(&fixed);
 445         for (element = cfg_list_first(obj);
 446              element != NULL;
 447              element = cfg_list_next(element)) {
 448                 nameobj = cfg_listelt_value(element);
 449                 str = cfg_obj_asstring(nameobj);
 450                 isc_buffer_init(&b, str, strlen(str));
 451                 isc_buffer_add(&b, strlen(str));
 452                 CHECK(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
 453                 /*
 454                  * We don't need the node data, but need to set dummy data to
 455                  * avoid a partial match with an empty node.  For example, if
 456                  * we have foo.example.com and bar.example.com, we'd get a match
 457                  * for baz.example.com, which is not the expected result.
 458                  * We simply use (void *)1 as the dummy data.
 459                  */
 460                 result = dns_rbt_addname(*rbtp, name, (void *)1);
 461                 if (result != ISC_R_SUCCESS) {
 462                         cfg_obj_log(nameobj, ns_g_lctx, ISC_LOG_ERROR,
 463                                     "failed to add %s for %s: %s",
 464                                     str, confname, isc_result_totext(result));
 465                         goto cleanup;
 466                 }
 467
 468         }
 469
 470         return (result);
 471
 472   cleanup:
 473         dns_rbt_destroy(rbtp);
 474         return (result);
 475
 476 }
 477
 478 static isc_result_t
 479 dstkey_fromconfig(const cfg_obj_t *vconfig, const cfg_obj_t *key,
 480                   isc_boolean_t managed, dst_key_t **target, isc_mem_t *mctx)
 481 {
 482         dns_rdataclass_t viewclass;
 483         dns_rdata_dnskey_t keystruct;
 484         isc_uint32_t flags, proto, alg;
 485         const char *keystr, *keynamestr;
 486         unsigned char keydata[4096];
 487         isc_buffer_t keydatabuf;
 488         unsigned char rrdata[4096];
 489         isc_buffer_t rrdatabuf;
 490         isc_region_t r;
 491         dns_fixedname_t fkeyname;
 492         dns_name_t *keyname;
 493         isc_buffer_t namebuf;
 494         isc_result_t result;
 495         dst_key_t *dstkey = NULL;
 496
 497         INSIST(target != NULL && *target == NULL);
 498
 499         flags = cfg_obj_asuint32(cfg_tuple_get(key, "flags"));
 500         proto = cfg_obj_asuint32(cfg_tuple_get(key, "protocol"));
 501         alg = cfg_obj_asuint32(cfg_tuple_get(key, "algorithm"));
 502         keyname = dns_fixedname_name(&fkeyname);
 503         keynamestr = cfg_obj_asstring(cfg_tuple_get(key, "name"));
 504
 505         if (managed) {
 506                 const char *initmethod;
 507                 initmethod = cfg_obj_asstring(cfg_tuple_get(key, "init"));
 508
 509                 if (strcasecmp(initmethod, "initial-key") != 0) {
 510                         cfg_obj_log(key, ns_g_lctx, ISC_LOG_ERROR,
 511                                     "managed key '%s': "
 512                                     "invalid initialization method '%s'",
 513                                     keynamestr, initmethod);
 514                         result = ISC_R_FAILURE;
 515                         goto cleanup;
 516                 }
 517         }
 518
 519         if (vconfig == NULL)
 520                 viewclass = dns_rdataclass_in;
 521         else {
 522                 const cfg_obj_t *classobj = cfg_tuple_get(vconfig, "class");
 523                 CHECK(ns_config_getclass(classobj, dns_rdataclass_in,
 524                                          &viewclass));
 525         }
 526         keystruct.common.rdclass = viewclass;
 527         keystruct.common.rdtype = dns_rdatatype_dnskey;
 528         /*
 529          * The key data in keystruct is not dynamically allocated.
 530          */
 531         keystruct.mctx = NULL;
 532
 533         ISC_LINK_INIT(&keystruct.common, link);
 534
 535         if (flags > 0xffff)
 536                 CHECKM(ISC_R_RANGE, "key flags");
 537         if (proto > 0xff)
 538                 CHECKM(ISC_R_RANGE, "key protocol");
 539         if (alg > 0xff)
 540                 CHECKM(ISC_R_RANGE, "key algorithm");
 541         keystruct.flags = (isc_uint16_t)flags;
 542         keystruct.protocol = (isc_uint8_t)proto;
 543         keystruct.algorithm = (isc_uint8_t)alg;
 544
 545         isc_buffer_init(&keydatabuf, keydata, sizeof(keydata));
 546         isc_buffer_init(&rrdatabuf, rrdata, sizeof(rrdata));
 547
 548         keystr = cfg_obj_asstring(cfg_tuple_get(key, "key"));
 549         CHECK(isc_base64_decodestring(keystr, &keydatabuf));
 550         isc_buffer_usedregion(&keydatabuf, &r);
 551         keystruct.datalen = r.length;
 552         keystruct.data = r.base;
 553
 554         if ((keystruct.algorithm == DST_ALG_RSASHA1 ||
 555              keystruct.algorithm == DST_ALG_RSAMD5) &&
 556             r.length > 1 && r.base[0] == 1 && r.base[1] == 3)
 557                 cfg_obj_log(key, ns_g_lctx, ISC_LOG_WARNING,
 558                             "%s key '%s' has a weak exponent",
 559                             managed ? "managed" : "trusted",
 560                             keynamestr);
 561
 562         CHECK(dns_rdata_fromstruct(NULL,
 563                                    keystruct.common.rdclass,
 564                                    keystruct.common.rdtype,
 565                                    &keystruct, &rrdatabuf));
 566         dns_fixedname_init(&fkeyname);
 567         isc_buffer_init(&namebuf, keynamestr, strlen(keynamestr));
 568         isc_buffer_add(&namebuf, strlen(keynamestr));
 569         CHECK(dns_name_fromtext(keyname, &namebuf, dns_rootname, 0, NULL));
 570         CHECK(dst_key_fromdns(keyname, viewclass, &rrdatabuf,
 571                               mctx, &dstkey));
 572
 573         *target = dstkey;
 574         return (ISC_R_SUCCESS);
 575
 576  cleanup:
 577         if (result == DST_R_NOCRYPTO) {
 578                 cfg_obj_log(key, ns_g_lctx, ISC_LOG_ERROR,
 579                             "ignoring %s key for '%s': no crypto support",
 580                             managed ? "managed" : "trusted",
 581                             keynamestr);
 582         } else if (result == DST_R_UNSUPPORTEDALG) {
 583                 cfg_obj_log(key, ns_g_lctx, ISC_LOG_WARNING,
 584                             "skipping %s key for '%s': %s",
 585                             managed ? "managed" : "trusted",
 586                             keynamestr, isc_result_totext(result));
 587         } else {
 588                 cfg_obj_log(key, ns_g_lctx, ISC_LOG_ERROR,
 589                             "configuring %s key for '%s': %s",
 590                             managed ? "managed" : "trusted",
 591                             keynamestr, isc_result_totext(result));
 592                 result = ISC_R_FAILURE;
 593         }
 594
 595         if (dstkey != NULL)
 596                 dst_key_free(&dstkey);
 597
 598         return (result);
 599 }
 600
 601 static isc_result_t
 602 load_view_keys(const cfg_obj_t *keys, const cfg_obj_t *vconfig,
 603                dns_view_t *view, isc_boolean_t managed,
 604                dns_name_t *keyname, isc_mem_t *mctx)
 605 {
 606         const cfg_listelt_t *elt, *elt2;
 607         const cfg_obj_t *key, *keylist;
 608         dst_key_t *dstkey = NULL;
 609         isc_result_t result;
 610         dns_keytable_t *secroots = NULL;
 611
 612         CHECK(dns_view_getsecroots(view, &secroots));
 613
 614         for (elt = cfg_list_first(keys);
 615              elt != NULL;
 616              elt = cfg_list_next(elt)) {
 617                 keylist = cfg_listelt_value(elt);
 618
 619                 for (elt2 = cfg_list_first(keylist);
 620                      elt2 != NULL;
 621                      elt2 = cfg_list_next(elt2)) {
 622                         key = cfg_listelt_value(elt2);
 623                         result = dstkey_fromconfig(vconfig, key, managed,
 624                                                    &dstkey, mctx);
 625                         if (result ==  DST_R_UNSUPPORTEDALG) {
 626                                 result = ISC_R_SUCCESS;
 627                                 continue;
 628                         }
 629                         if (result != ISC_R_SUCCESS)
 630                                 goto cleanup;
 631
 632                         /*
 633                          * If keyname was specified, we only add that key.
 634                          */
 635                         if (keyname != NULL &&
 636                             !dns_name_equal(keyname, dst_key_name(dstkey)))
 637                         {
 638                                 dst_key_free(&dstkey);
 639                                 continue;
 640                         }
 641
 642                         CHECK(dns_keytable_add(secroots, managed, &dstkey));
 643                 }
 644         }
 645
 646  cleanup:
 647         if (dstkey != NULL)
 648                 dst_key_free(&dstkey);
 649         if (secroots != NULL)
 650                 dns_keytable_detach(&secroots);
 651         if (result == DST_R_NOCRYPTO)
 652                 result = ISC_R_SUCCESS;
 653         return (result);
 654 }
 655
 656 /*%
 657  * Configure DNSSEC keys for a view.
 658  *
 659  * The per-view configuration values and the server-global defaults are read
 660  * from 'vconfig' and 'config'.
 661  */
 662 static isc_result_t
 663 configure_view_dnsseckeys(dns_view_t *view, const cfg_obj_t *vconfig,
 664                           const cfg_obj_t *config, const cfg_obj_t *bindkeys,
 665                           isc_boolean_t auto_dlv, isc_boolean_t auto_root,
 666                           isc_mem_t *mctx)
 667 {
 668         isc_result_t result = ISC_R_SUCCESS;
 669         const cfg_obj_t *view_keys = NULL;
 670         const cfg_obj_t *global_keys = NULL;
 671         const cfg_obj_t *view_managed_keys = NULL;
 672         const cfg_obj_t *global_managed_keys = NULL;
 673         const cfg_obj_t *maps[4];
 674         const cfg_obj_t *voptions = NULL;
 675         const cfg_obj_t *options = NULL;
 676         const cfg_obj_t *obj = NULL;
 677         const char *directory;
 678         int i = 0;
 679
 680         /* We don't need trust anchors for the _bind view */
 681         if (strcmp(view->name, "_bind") == 0 &&
 682             view->rdclass == dns_rdataclass_chaos) {
 683                 return (ISC_R_SUCCESS);
 684         }
 685
 686         if (vconfig != NULL) {
 687                 voptions = cfg_tuple_get(vconfig, "options");
 688                 if (voptions != NULL) {
 689                         (void) cfg_map_get(voptions, "trusted-keys",
 690                                            &view_keys);
 691                         (void) cfg_map_get(voptions, "managed-keys",
 692                                            &view_managed_keys);
 693                         maps[i++] = voptions;
 694                 }
 695         }
 696
 697         if (config != NULL) {
 698                 (void)cfg_map_get(config, "trusted-keys", &global_keys);
 699                 (void)cfg_map_get(config, "managed-keys", &global_managed_keys);
 700                 (void)cfg_map_get(config, "options", &options);
 701                 if (options != NULL) {
 702                         maps[i++] = options;
 703                 }
 704         }
 705
 706         maps[i++] = ns_g_defaults;
 707         maps[i] = NULL;
 708
 709         result = dns_view_initsecroots(view, mctx);
 710         if (result != ISC_R_SUCCESS) {
 711                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 712                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
 713                               "couldn't create keytable");
 714                 return (ISC_R_UNEXPECTED);
 715         }
 716
 717         if (auto_dlv && view->rdclass == dns_rdataclass_in) {
 718                 const cfg_obj_t *builtin_keys = NULL;
 719                 const cfg_obj_t *builtin_managed_keys = NULL;
 720
 721                 isc_log_write(ns_g_lctx, DNS_LOGCATEGORY_SECURITY,
 722                               NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
 723                               "using built-in DLV key for view %s",
 724                               view->name);
 725
 726                 /*
 727                  * If bind.keys exists, it overrides the managed-keys
 728                  * clause hard-coded in ns_g_config.
 729                  */
 730                 if (bindkeys != NULL) {
 731                         (void)cfg_map_get(bindkeys, "trusted-keys",
 732                                           &builtin_keys);
 733                         (void)cfg_map_get(bindkeys, "managed-keys",
 734                                           &builtin_managed_keys);
 735                 } else {
 736                         (void)cfg_map_get(ns_g_config, "trusted-keys",
 737                                           &builtin_keys);
 738                         (void)cfg_map_get(ns_g_config, "managed-keys",
 739                                           &builtin_managed_keys);
 740                 }
 741
 742                 if (builtin_keys != NULL)
 743                         CHECK(load_view_keys(builtin_keys, vconfig, view,
 744                                              ISC_FALSE, view->dlv, mctx));
 745                 if (builtin_managed_keys != NULL)
 746                         CHECK(load_view_keys(builtin_managed_keys, vconfig,
 747                                              view, ISC_TRUE, view->dlv, mctx));
 748         }
 749
 750         if (auto_root && view->rdclass == dns_rdataclass_in) {
 751                 const cfg_obj_t *builtin_keys = NULL;
 752                 const cfg_obj_t *builtin_managed_keys = NULL;
 753
 754                 isc_log_write(ns_g_lctx, DNS_LOGCATEGORY_SECURITY,
 755                               NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
 756                               "using built-in root key for view %s",
 757                               view->name);
 758
 759                 /*
 760                  * If bind.keys exists, it overrides the managed-keys
 761                  * clause hard-coded in ns_g_config.
 762                  */
 763                 if (bindkeys != NULL) {
 764                         (void)cfg_map_get(bindkeys, "trusted-keys",
 765                                           &builtin_keys);
 766                         (void)cfg_map_get(bindkeys, "managed-keys",
 767                                           &builtin_managed_keys);
 768                 } else {
 769                         (void)cfg_map_get(ns_g_config, "trusted-keys",
 770                                           &builtin_keys);
 771                         (void)cfg_map_get(ns_g_config, "managed-keys",
 772                                           &builtin_managed_keys);
 773                 }
 774
 775                 if (builtin_keys != NULL)
 776                         CHECK(load_view_keys(builtin_keys, vconfig, view,
 777                                              ISC_FALSE, dns_rootname, mctx));
 778                 if (builtin_managed_keys != NULL)
 779                         CHECK(load_view_keys(builtin_managed_keys, vconfig,
 780                                              view, ISC_TRUE, dns_rootname,
 781                                              mctx));
 782         }
 783
 784         CHECK(load_view_keys(view_keys, vconfig, view, ISC_FALSE,
 785                              NULL, mctx));
 786         CHECK(load_view_keys(view_managed_keys, vconfig, view, ISC_TRUE,
 787                              NULL, mctx));
 788
 789         if (view->rdclass == dns_rdataclass_in) {
 790                 CHECK(load_view_keys(global_keys, vconfig, view, ISC_FALSE,
 791                                      NULL, mctx));
 792                 CHECK(load_view_keys(global_managed_keys, vconfig, view,
 793                                      ISC_TRUE, NULL, mctx));
 794         }
 795
 796         /*
 797          * Add key zone for managed-keys.
 798          */
 799         obj = NULL;
 800         (void)ns_config_get(maps, "managed-keys-directory", &obj);
 801         directory = obj != NULL ? cfg_obj_asstring(obj) : NULL;
 802         CHECK(add_keydata_zone(view, directory, ns_g_mctx));
 803
 804   cleanup:
 805         return (result);
 806 }
 807
 808 static isc_result_t
 809 mustbesecure(const cfg_obj_t *mbs, dns_resolver_t *resolver) {
 810         const cfg_listelt_t *element;
 811         const cfg_obj_t *obj;
 812         const char *str;
 813         dns_fixedname_t fixed;
 814         dns_name_t *name;
 815         isc_boolean_t value;
 816         isc_result_t result;
 817         isc_buffer_t b;
 818
 819         dns_fixedname_init(&fixed);
 820         name = dns_fixedname_name(&fixed);
 821         for (element = cfg_list_first(mbs);
 822              element != NULL;
 823              element = cfg_list_next(element))
 824         {
 825                 obj = cfg_listelt_value(element);
 826                 str = cfg_obj_asstring(cfg_tuple_get(obj, "name"));
 827                 isc_buffer_init(&b, str, strlen(str));
 828                 isc_buffer_add(&b, strlen(str));
 829                 CHECK(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
 830                 value = cfg_obj_asboolean(cfg_tuple_get(obj, "value"));
 831                 CHECK(dns_resolver_setmustbesecure(resolver, name, value));
 832         }
 833
 834         result = ISC_R_SUCCESS;
 835
 836  cleanup:
 837         return (result);
 838 }
 839
 840 /*%
 841  * Get a dispatch appropriate for the resolver of a given view.
 842  */
 843 static isc_result_t
 844 get_view_querysource_dispatch(const cfg_obj_t **maps,
 845                               int af, dns_dispatch_t **dispatchp,
 846                               isc_boolean_t is_firstview)
 847 {
 848         isc_result_t result = ISC_R_FAILURE;
 849         dns_dispatch_t *disp;
 850         isc_sockaddr_t sa;
 851         unsigned int attrs, attrmask;
 852         const cfg_obj_t *obj = NULL;
 853         unsigned int maxdispatchbuffers;
 854
 855         switch (af) {
 856         case AF_INET:
 857                 result = ns_config_get(maps, "query-source", &obj);
 858                 INSIST(result == ISC_R_SUCCESS);
 859                 break;
 860         case AF_INET6:
 861                 result = ns_config_get(maps, "query-source-v6", &obj);
 862                 INSIST(result == ISC_R_SUCCESS);
 863                 break;
 864         default:
 865                 INSIST(0);
 866         }
 867
 868         sa = *(cfg_obj_assockaddr(obj));
 869         INSIST(isc_sockaddr_pf(&sa) == af);
 870
 871         /*
 872          * If we don't support this address family, we're done!
 873          */
 874         switch (af) {
 875         case AF_INET:
 876                 result = isc_net_probeipv4();
 877                 break;
 878         case AF_INET6:
 879                 result = isc_net_probeipv6();
 880                 break;
 881         default:
 882                 INSIST(0);
 883         }
 884         if (result != ISC_R_SUCCESS)
 885                 return (ISC_R_SUCCESS);
 886
 887         /*
 888          * Try to find a dispatcher that we can share.
 889          */
 890         attrs = 0;
 891         attrs |= DNS_DISPATCHATTR_UDP;
 892         switch (af) {
 893         case AF_INET:
 894                 attrs |= DNS_DISPATCHATTR_IPV4;
 895                 break;
 896         case AF_INET6:
 897                 attrs |= DNS_DISPATCHATTR_IPV6;
 898                 break;
 899         }
 900         if (isc_sockaddr_getport(&sa) == 0) {
 901                 attrs |= DNS_DISPATCHATTR_EXCLUSIVE;
 902                 maxdispatchbuffers = 4096;
 903         } else {
 904                 INSIST(obj != NULL);
 905                 if (is_firstview) {
 906                         cfg_obj_log(obj, ns_g_lctx, ISC_LOG_INFO,
 907                                     "using specific query-source port "
 908                                     "suppresses port randomization and can be "
 909                                     "insecure.");
 910                 }
 911                 maxdispatchbuffers = 1000;
 912         }
 913
 914         attrmask = 0;
 915         attrmask |= DNS_DISPATCHATTR_UDP;
 916         attrmask |= DNS_DISPATCHATTR_TCP;
 917         attrmask |= DNS_DISPATCHATTR_IPV4;
 918         attrmask |= DNS_DISPATCHATTR_IPV6;
 919
 920         disp = NULL;
 921         result = dns_dispatch_getudp(ns_g_dispatchmgr, ns_g_socketmgr,
 922                                      ns_g_taskmgr, &sa, 4096,
 923                                      maxdispatchbuffers, 32768, 16411, 16433,
 924                                      attrs, attrmask, &disp);
 925         if (result != ISC_R_SUCCESS) {
 926                 isc_sockaddr_t any;
 927                 char buf[ISC_SOCKADDR_FORMATSIZE];
 928
 929                 switch (af) {
 930                 case AF_INET:
 931                         isc_sockaddr_any(&any);
 932                         break;
 933                 case AF_INET6:
 934                         isc_sockaddr_any6(&any);
 935                         break;
 936                 }
 937                 if (isc_sockaddr_equal(&sa, &any))
 938                         return (ISC_R_SUCCESS);
 939                 isc_sockaddr_format(&sa, buf, sizeof(buf));
 940                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 941                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
 942                               "could not get query source dispatcher (%s)",
 943                               buf);
 944                 return (result);
 945         }
 946
 947         *dispatchp = disp;
 948
 949         return (ISC_R_SUCCESS);
 950 }
 951
 952 static isc_result_t
 953 configure_order(dns_order_t *order, const cfg_obj_t *ent) {
 954         dns_rdataclass_t rdclass;
 955         dns_rdatatype_t rdtype;
 956         const cfg_obj_t *obj;
 957         dns_fixedname_t fixed;
 958         unsigned int mode = 0;
 959         const char *str;
 960         isc_buffer_t b;
 961         isc_result_t result;
 962         isc_boolean_t addroot;
 963
 964         result = ns_config_getclass(cfg_tuple_get(ent, "class"),
 965                                     dns_rdataclass_any, &rdclass);
 966         if (result != ISC_R_SUCCESS)
 967                 return (result);
 968
 969         result = ns_config_gettype(cfg_tuple_get(ent, "type"),
 970                                    dns_rdatatype_any, &rdtype);
 971         if (result != ISC_R_SUCCESS)
 972                 return (result);
 973
 974         obj = cfg_tuple_get(ent, "name");
 975         if (cfg_obj_isstring(obj))
 976                 str = cfg_obj_asstring(obj);
 977         else
 978                 str = "*";
 979         addroot = ISC_TF(strcmp(str, "*") == 0);
 980         isc_buffer_init(&b, str, strlen(str));
 981         isc_buffer_add(&b, strlen(str));
 982         dns_fixedname_init(&fixed);
 983         result = dns_name_fromtext(dns_fixedname_name(&fixed), &b,
 984                                    dns_rootname, 0, NULL);
 985         if (result != ISC_R_SUCCESS)
 986                 return (result);
 987
 988         obj = cfg_tuple_get(ent, "ordering");
 989         INSIST(cfg_obj_isstring(obj));
 990         str = cfg_obj_asstring(obj);
 991         if (!strcasecmp(str, "fixed"))
 992                 mode = DNS_RDATASETATTR_FIXEDORDER;
 993         else if (!strcasecmp(str, "random"))
 994                 mode = DNS_RDATASETATTR_RANDOMIZE;
 995         else if (!strcasecmp(str, "cyclic"))
 996                 mode = 0;
 997         else
 998                 INSIST(0);
 999
1000         /*
1001          * "*" should match everything including the root (BIND 8 compat).
1002          * As dns_name_matcheswildcard(".", "*.") returns FALSE add a
1003          * explicit entry for "." when the name is "*".
1004          */
1005         if (addroot) {
1006                 result = dns_order_add(order, dns_rootname,
1007                                        rdtype, rdclass, mode);
1008                 if (result != ISC_R_SUCCESS)
1009                         return (result);
1010         }
1011
1012         return (dns_order_add(order, dns_fixedname_name(&fixed),
1013                               rdtype, rdclass, mode));
1014 }
1015
1016 static isc_result_t
1017 configure_peer(const cfg_obj_t *cpeer, isc_mem_t *mctx, dns_peer_t **peerp) {
1018         isc_netaddr_t na;
1019         dns_peer_t *peer;
1020         const cfg_obj_t *obj;
1021         const char *str;
1022         isc_result_t result;
1023         unsigned int prefixlen;
1024
1025         cfg_obj_asnetprefix(cfg_map_getname(cpeer), &na, &prefixlen);
1026
1027         peer = NULL;
1028         result = dns_peer_newprefix(mctx, &na, prefixlen, &peer);
1029         if (result != ISC_R_SUCCESS)
1030                 return (result);
1031
1032         obj = NULL;
1033         (void)cfg_map_get(cpeer, "bogus", &obj);
1034         if (obj != NULL)
1035                 CHECK(dns_peer_setbogus(peer, cfg_obj_asboolean(obj)));
1036
1037         obj = NULL;
1038         (void)cfg_map_get(cpeer, "provide-ixfr", &obj);
1039         if (obj != NULL)
1040                 CHECK(dns_peer_setprovideixfr(peer, cfg_obj_asboolean(obj)));
1041
1042         obj = NULL;
1043         (void)cfg_map_get(cpeer, "request-ixfr", &obj);
1044         if (obj != NULL)
1045                 CHECK(dns_peer_setrequestixfr(peer, cfg_obj_asboolean(obj)));
1046
1047         obj = NULL;
1048         (void)cfg_map_get(cpeer, "request-nsid", &obj);
1049         if (obj != NULL)
1050                 CHECK(dns_peer_setrequestnsid(peer, cfg_obj_asboolean(obj)));
1051
1052         obj = NULL;
1053         (void)cfg_map_get(cpeer, "edns", &obj);
1054         if (obj != NULL)
1055                 CHECK(dns_peer_setsupportedns(peer, cfg_obj_asboolean(obj)));
1056
1057         obj = NULL;
1058         (void)cfg_map_get(cpeer, "edns-udp-size", &obj);
1059         if (obj != NULL) {
1060                 isc_uint32_t udpsize = cfg_obj_asuint32(obj);
1061                 if (udpsize < 512)
1062                         udpsize = 512;
1063                 if (udpsize > 4096)
1064                         udpsize = 4096;
1065                 CHECK(dns_peer_setudpsize(peer, (isc_uint16_t)udpsize));
1066         }
1067
1068         obj = NULL;
1069         (void)cfg_map_get(cpeer, "max-udp-size", &obj);
1070         if (obj != NULL) {
1071                 isc_uint32_t udpsize = cfg_obj_asuint32(obj);
1072                 if (udpsize < 512)
1073                         udpsize = 512;
1074                 if (udpsize > 4096)
1075                         udpsize = 4096;
1076                 CHECK(dns_peer_setmaxudp(peer, (isc_uint16_t)udpsize));
1077         }
1078
1079         obj = NULL;
1080         (void)cfg_map_get(cpeer, "transfers", &obj);
1081         if (obj != NULL)
1082                 CHECK(dns_peer_settransfers(peer, cfg_obj_asuint32(obj)));
1083
1084         obj = NULL;
1085         (void)cfg_map_get(cpeer, "transfer-format", &obj);
1086         if (obj != NULL) {
1087                 str = cfg_obj_asstring(obj);
1088                 if (strcasecmp(str, "many-answers") == 0)
1089                         CHECK(dns_peer_settransferformat(peer,
1090                                                          dns_many_answers));
1091                 else if (strcasecmp(str, "one-answer") == 0)
1092                         CHECK(dns_peer_settransferformat(peer,
1093                                                          dns_one_answer));
1094                 else
1095                         INSIST(0);
1096         }
1097
1098         obj = NULL;
1099         (void)cfg_map_get(cpeer, "keys", &obj);
1100         if (obj != NULL) {
1101                 result = dns_peer_setkeybycharp(peer, cfg_obj_asstring(obj));
1102                 if (result != ISC_R_SUCCESS)
1103                         goto cleanup;
1104         }
1105
1106         obj = NULL;
1107         if (na.family == AF_INET)
1108                 (void)cfg_map_get(cpeer, "transfer-source", &obj);
1109         else
1110                 (void)cfg_map_get(cpeer, "transfer-source-v6", &obj);
1111         if (obj != NULL) {
1112                 result = dns_peer_settransfersource(peer,
1113                                                     cfg_obj_assockaddr(obj));
1114                 if (result != ISC_R_SUCCESS)
1115                         goto cleanup;
1116                 ns_add_reserved_dispatch(ns_g_server, cfg_obj_assockaddr(obj));
1117         }
1118
1119         obj = NULL;
1120         if (na.family == AF_INET)
1121                 (void)cfg_map_get(cpeer, "notify-source", &obj);
1122         else
1123                 (void)cfg_map_get(cpeer, "notify-source-v6", &obj);
1124         if (obj != NULL) {
1125                 result = dns_peer_setnotifysource(peer,
1126                                                   cfg_obj_assockaddr(obj));
1127                 if (result != ISC_R_SUCCESS)
1128                         goto cleanup;
1129                 ns_add_reserved_dispatch(ns_g_server, cfg_obj_assockaddr(obj));
1130         }
1131
1132         obj = NULL;
1133         if (na.family == AF_INET)
1134                 (void)cfg_map_get(cpeer, "query-source", &obj);
1135         else
1136                 (void)cfg_map_get(cpeer, "query-source-v6", &obj);
1137         if (obj != NULL) {
1138                 result = dns_peer_setquerysource(peer,
1139                                                  cfg_obj_assockaddr(obj));
1140                 if (result != ISC_R_SUCCESS)
1141                         goto cleanup;
1142                 ns_add_reserved_dispatch(ns_g_server, cfg_obj_assockaddr(obj));
1143         }
1144
1145         *peerp = peer;
1146         return (ISC_R_SUCCESS);
1147
1148  cleanup:
1149         dns_peer_detach(&peer);
1150         return (result);
1151 }
1152
1153 static isc_result_t
1154 disable_algorithms(const cfg_obj_t *disabled, dns_resolver_t *resolver) {
1155         isc_result_t result;
1156         const cfg_obj_t *algorithms;
1157         const cfg_listelt_t *element;
1158         const char *str;
1159         dns_fixedname_t fixed;
1160         dns_name_t *name;
1161         isc_buffer_t b;
1162
1163         dns_fixedname_init(&fixed);
1164         name = dns_fixedname_name(&fixed);
1165         str = cfg_obj_asstring(cfg_tuple_get(disabled, "name"));
1166         isc_buffer_init(&b, str, strlen(str));
1167         isc_buffer_add(&b, strlen(str));
1168         CHECK(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
1169
1170         algorithms = cfg_tuple_get(disabled, "algorithms");
1171         for (element = cfg_list_first(algorithms);
1172              element != NULL;
1173              element = cfg_list_next(element))
1174         {
1175                 isc_textregion_t r;
1176                 dns_secalg_t alg;
1177
1178                 DE_CONST(cfg_obj_asstring(cfg_listelt_value(element)), r.base);
1179                 r.length = strlen(r.base);
1180
1181                 result = dns_secalg_fromtext(&alg, &r);
1182                 if (result != ISC_R_SUCCESS) {
1183                         isc_uint8_t ui;
1184                         result = isc_parse_uint8(&ui, r.base, 10);
1185                         alg = ui;
1186                 }
1187                 if (result != ISC_R_SUCCESS) {
1188                         cfg_obj_log(cfg_listelt_value(element),
1189                                     ns_g_lctx, ISC_LOG_ERROR,
1190                                     "invalid algorithm");
1191                         CHECK(result);
1192                 }
1193                 CHECK(dns_resolver_disable_algorithm(resolver, name, alg));
1194         }
1195  cleanup:
1196         return (result);
1197 }
1198
1199 static isc_boolean_t
1200 on_disable_list(const cfg_obj_t *disablelist, dns_name_t *zonename) {
1201         const cfg_listelt_t *element;
1202         dns_fixedname_t fixed;
1203         dns_name_t *name;
1204         isc_result_t result;
1205         const cfg_obj_t *value;
1206         const char *str;
1207         isc_buffer_t b;
1208
1209         dns_fixedname_init(&fixed);
1210         name = dns_fixedname_name(&fixed);
1211
1212         for (element = cfg_list_first(disablelist);
1213              element != NULL;
1214              element = cfg_list_next(element))
1215         {
1216                 value = cfg_listelt_value(element);
1217                 str = cfg_obj_asstring(value);
1218                 isc_buffer_init(&b, str, strlen(str));
1219                 isc_buffer_add(&b, strlen(str));
1220                 result = dns_name_fromtext(name, &b, dns_rootname,
1221                                            0, NULL);
1222                 RUNTIME_CHECK(result == ISC_R_SUCCESS);
1223                 if (dns_name_equal(name, zonename))
1224                         return (ISC_TRUE);
1225         }
1226         return (ISC_FALSE);
1227 }
1228
1229 static void
1230 check_dbtype(dns_zone_t **zonep, unsigned int dbtypec, const char **dbargv,
1231              isc_mem_t *mctx)
1232 {
1233         char **argv = NULL;
1234         unsigned int i;
1235         isc_result_t result;
1236
1237         result = dns_zone_getdbtype(*zonep, &argv, mctx);
1238         if (result != ISC_R_SUCCESS) {
1239                 dns_zone_detach(zonep);
1240                 return;
1241         }
1242
1243         /*
1244          * Check that all the arguments match.
1245          */
1246         for (i = 0; i < dbtypec; i++)
1247                 if (argv[i] == NULL || strcmp(argv[i], dbargv[i]) != 0) {
1248                         dns_zone_detach(zonep);
1249                         break;
1250                 }
1251
1252         /*
1253          * Check that there are not extra arguments.
1254          */
1255         if (i == dbtypec && argv[i] != NULL)
1256                 dns_zone_detach(zonep);
1257         isc_mem_free(mctx, argv);
1258 }
1259
1260 static isc_result_t
1261 setquerystats(dns_zone_t *zone, isc_mem_t *mctx, isc_boolean_t on) {
1262         isc_result_t result;
1263         isc_stats_t *zoneqrystats;
1264
1265         zoneqrystats = NULL;
1266         if (on) {
1267                 result = isc_stats_create(mctx, &zoneqrystats,
1268                                           dns_nsstatscounter_max);
1269                 if (result != ISC_R_SUCCESS)
1270                         return (result);
1271         }
1272         dns_zone_setrequeststats(zone, zoneqrystats);
1273         if (zoneqrystats != NULL)
1274                 isc_stats_detach(&zoneqrystats);
1275
1276         return (ISC_R_SUCCESS);
1277 }
1278
1279 static ns_cache_t *
1280 cachelist_find(ns_cachelist_t *cachelist, const char *cachename) {
1281         ns_cache_t *nsc;
1282
1283         for (nsc = ISC_LIST_HEAD(*cachelist);
1284              nsc != NULL;
1285              nsc = ISC_LIST_NEXT(nsc, link)) {
1286                 if (strcmp(dns_cache_getname(nsc->cache), cachename) == 0)
1287                         return (nsc);
1288         }
1289
1290         return (NULL);
1291 }
1292
1293 static isc_boolean_t
1294 cache_reusable(dns_view_t *originview, dns_view_t *view,
1295                isc_boolean_t new_zero_no_soattl)
1296 {
1297         if (originview->checknames != view->checknames ||
1298             dns_resolver_getzeronosoattl(originview->resolver) !=
1299             new_zero_no_soattl ||
1300             originview->acceptexpired != view->acceptexpired ||
1301             originview->enablevalidation != view->enablevalidation ||
1302             originview->maxcachettl != view->maxcachettl ||
1303             originview->maxncachettl != view->maxncachettl) {
1304                 return (ISC_FALSE);
1305         }
1306
1307         return (ISC_TRUE);
1308 }
1309
1310 static isc_boolean_t
1311 cache_sharable(dns_view_t *originview, dns_view_t *view,
1312                isc_boolean_t new_zero_no_soattl,
1313                unsigned int new_cleaning_interval,
1314                isc_uint32_t new_max_cache_size)
1315 {
1316         /*
1317          * If the cache cannot even reused for the same view, it cannot be
1318          * shared with other views.
1319          */
1320         if (!cache_reusable(originview, view, new_zero_no_soattl))
1321                 return (ISC_FALSE);
1322
1323         /*
1324          * Check other cache related parameters that must be consistent among
1325          * the sharing views.
1326          */
1327         if (dns_cache_getcleaninginterval(originview->cache) !=
1328             new_cleaning_interval ||
1329             dns_cache_getcachesize(originview->cache) != new_max_cache_size) {
1330                 return (ISC_FALSE);
1331         }
1332
1333         return (ISC_TRUE);
1334 }
1335
1336 /*
1337  * Callback from DLZ configure when the driver sets up a writeable zone
1338  */
1339 static isc_result_t
1340 dlzconfigure_callback(dns_view_t *view, dns_zone_t *zone) {
1341         dns_name_t *origin = dns_zone_getorigin(zone);
1342         dns_rdataclass_t zclass = view->rdclass;
1343         isc_result_t result;
1344
1345         result = dns_zonemgr_managezone(ns_g_server->zonemgr, zone);
1346         if (result != ISC_R_SUCCESS)
1347                 return result;
1348         dns_zone_setstats(zone, ns_g_server->zonestats);
1349
1350         return ns_zone_configure_writeable_dlz(view->dlzdatabase,
1351                                                zone, zclass, origin);
1352 }
1353
1354 static isc_result_t
1355 dns64_reverse(dns_view_t *view, isc_mem_t *mctx, isc_netaddr_t *na,
1356               unsigned int prefixlen, const char *server,
1357               const char *contact)
1358 {
1359         char *cp;
1360         char reverse[48+sizeof("ip6.arpa.")];
1361         const char *dns64_dbtype[4] = { "_dns64", "dns64", ".", "." };
1362         const char *sep = ": view ";
1363         const char *viewname = view->name;
1364         const unsigned char *s6;
1365         dns_fixedname_t fixed;
1366         dns_name_t *name;
1367         dns_zone_t *zone = NULL;
1368         int dns64_dbtypec = 4;
1369         isc_buffer_t b;
1370         isc_result_t result;
1371
1372         REQUIRE(prefixlen == 32 || prefixlen == 40 || prefixlen == 48 ||
1373                 prefixlen == 56 || prefixlen == 64 || prefixlen == 96);
1374
1375         if (!strcmp(viewname, "_default")) {
1376                 sep = "";
1377                 viewname = "";
1378         }
1379
1380         /*
1381          * Construct the reverse name of the zone.
1382          */
1383         cp = reverse;
1384         s6 = na->type.in6.s6_addr;
1385         while (prefixlen > 0) {
1386                 prefixlen -= 8;
1387                 sprintf(cp, "%x.%x.", s6[prefixlen/8] & 0xf,
1388                         (s6[prefixlen/8] >> 4) & 0xf);
1389                 cp += 4;
1390         }
1391         strcat(cp, "ip6.arpa.");
1392
1393         /*
1394          * Create the actual zone.
1395          */
1396         if (server != NULL)
1397                 dns64_dbtype[2] = server;
1398         if (contact != NULL)
1399                 dns64_dbtype[3] = contact;
1400         dns_fixedname_init(&fixed);
1401         name = dns_fixedname_name(&fixed);
1402         isc_buffer_init(&b, reverse, strlen(reverse));
1403         isc_buffer_add(&b, strlen(reverse));
1404         CHECK(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
1405         CHECK(dns_zone_create(&zone, mctx));
1406         CHECK(dns_zone_setorigin(zone, name));
1407         dns_zone_setview(zone, view);
1408         CHECK(dns_zonemgr_managezone(ns_g_server->zonemgr, zone));
1409         dns_zone_setclass(zone, view->rdclass);
1410         dns_zone_settype(zone, dns_zone_master);
1411         dns_zone_setstats(zone, ns_g_server->zonestats);
1412         CHECK(dns_zone_setdbtype(zone, dns64_dbtypec, dns64_dbtype));
1413         if (view->queryacl != NULL)
1414                 dns_zone_setqueryacl(zone, view->queryacl);
1415         if (view->queryonacl != NULL)
1416                 dns_zone_setqueryonacl(zone, view->queryonacl);
1417         dns_zone_setdialup(zone, dns_dialuptype_no);
1418         dns_zone_setnotifytype(zone, dns_notifytype_no);
1419         dns_zone_setoption(zone, DNS_ZONEOPT_NOCHECKNS, ISC_TRUE);
1420         CHECK(setquerystats(zone, mctx, ISC_FALSE));    /* XXXMPA */
1421         CHECK(dns_view_addzone(view, zone));
1422         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
1423                       ISC_LOG_INFO, "dns64 reverse zone%s%s: %s", sep,
1424                       viewname, reverse);
1425
1426 cleanup:
1427         if (zone != NULL)
1428                 dns_zone_detach(&zone);
1429         return (result);
1430 }
1431
1432 static isc_result_t
1433 configure_rpz(dns_view_t *view, const cfg_listelt_t *element) {
1434         const cfg_obj_t *rpz_obj, *policy_obj;
1435         const char *str;
1436         dns_fixedname_t fixed;
1437         dns_name_t *origin;
1438         dns_rpz_zone_t *old, *new;
1439         dns_zone_t *zone = NULL;
1440         isc_result_t result;
1441         unsigned int l1, l2;
1442
1443         new = isc_mem_get(view->mctx, sizeof(*new));
1444         if (new == NULL) {
1445                 result = ISC_R_NOMEMORY;
1446                 goto cleanup;
1447         }
1448
1449         memset(new, 0, sizeof(*new));
1450         dns_name_init(&new->nsdname, NULL);
1451         dns_name_init(&new->origin, NULL);
1452         dns_name_init(&new->cname, NULL);
1453         ISC_LIST_INITANDAPPEND(view->rpz_zones, new, link);
1454
1455         rpz_obj = cfg_listelt_value(element);
1456         policy_obj = cfg_tuple_get(rpz_obj, "policy");
1457         if (cfg_obj_isvoid(policy_obj)) {
1458                 new->policy = DNS_RPZ_POLICY_GIVEN;
1459         } else {
1460                 str = cfg_obj_asstring(policy_obj);
1461                 new->policy = dns_rpz_str2policy(str);
1462                 INSIST(new->policy != DNS_RPZ_POLICY_ERROR);
1463         }
1464
1465         dns_fixedname_init(&fixed);
1466         origin = dns_fixedname_name(&fixed);
1467         str = cfg_obj_asstring(cfg_tuple_get(rpz_obj, "name"));
1468         result = dns_name_fromstring(origin, str, DNS_NAME_DOWNCASE, NULL);
1469         if (result != ISC_R_SUCCESS) {
1470                 cfg_obj_log(rpz_obj, ns_g_lctx, DNS_RPZ_ERROR_LEVEL,
1471                             "invalid zone '%s'", str);
1472                 goto cleanup;
1473         }
1474
1475         result = dns_name_fromstring2(&new->nsdname, DNS_RPZ_NSDNAME_ZONE,
1476                                       origin, DNS_NAME_DOWNCASE, view->mctx);
1477         if (result != ISC_R_SUCCESS) {
1478                 cfg_obj_log(rpz_obj, ns_g_lctx, DNS_RPZ_ERROR_LEVEL,
1479                             "invalid zone '%s'", str);
1480                 goto cleanup;
1481         }
1482
1483         /*
1484          * The origin is part of 'nsdname' so we don't need to keep it
1485          * seperately.
1486          */
1487         l1 = dns_name_countlabels(&new->nsdname);
1488         l2 = dns_name_countlabels(origin);
1489         dns_name_getlabelsequence(&new->nsdname, l1 - l2, l2, &new->origin);
1490
1491         /*
1492          * Are we configured to with the reponse policy zone?
1493          */
1494         result = dns_view_findzone(view, &new->origin, &zone);
1495         if (result != ISC_R_SUCCESS) {
1496                 cfg_obj_log(rpz_obj, ns_g_lctx, DNS_RPZ_ERROR_LEVEL,
1497                             "unknown zone '%s'", str);
1498                 goto cleanup;
1499         }
1500
1501         if (dns_zone_gettype(zone) != dns_zone_master &&
1502             dns_zone_gettype(zone) != dns_zone_slave) {
1503                 cfg_obj_log(rpz_obj, ns_g_lctx, DNS_RPZ_ERROR_LEVEL,
1504                              "zone '%s' is neither master nor slave", str);
1505                 dns_zone_detach(&zone);
1506                 result = DNS_R_NOTMASTER;
1507                 goto cleanup;
1508         }
1509         dns_zone_detach(&zone);
1510
1511         for (old = ISC_LIST_HEAD(view->rpz_zones);
1512              old != new;
1513              old = ISC_LIST_NEXT(old, link)) {
1514                 ++new->num;
1515                 if (dns_name_equal(&old->origin, &new->origin)) {
1516                         cfg_obj_log(rpz_obj, ns_g_lctx, DNS_RPZ_ERROR_LEVEL,
1517                                     "duplicate '%s'", str);
1518                         result = DNS_R_DUPLICATE;
1519                         goto cleanup;
1520                 }
1521         }
1522
1523         if (new->policy == DNS_RPZ_POLICY_CNAME) {
1524                 str = cfg_obj_asstring(cfg_tuple_get(rpz_obj, "cname"));
1525                 result = dns_name_fromstring(&new->cname, str, 0, view->mctx);
1526                 if (result != ISC_R_SUCCESS) {
1527                         cfg_obj_log(rpz_obj, ns_g_lctx, DNS_RPZ_ERROR_LEVEL,
1528                                     "invalid cname '%s'", str);
1529                         goto cleanup;
1530                 }
1531         }
1532
1533         return (ISC_R_SUCCESS);
1534
1535  cleanup:
1536         dns_rpz_view_destroy(view);
1537         return (result);
1538 }
1539
1540 /*
1541  * Configure 'view' according to 'vconfig', taking defaults from 'config'
1542  * where values are missing in 'vconfig'.
1543  *
1544  * When configuring the default view, 'vconfig' will be NULL and the
1545  * global defaults in 'config' used exclusively.
1546  */
1547 static isc_result_t
1548 configure_view(dns_view_t *view, cfg_obj_t *config, cfg_obj_t *vconfig,
1549                ns_cachelist_t *cachelist, const cfg_obj_t *bindkeys,
1550                isc_mem_t *mctx, cfg_aclconfctx_t *actx,
1551                isc_boolean_t need_hints)
1552 {
1553         const cfg_obj_t *maps[4];
1554         const cfg_obj_t *cfgmaps[3];
1555         const cfg_obj_t *optionmaps[3];
1556         const cfg_obj_t *options = NULL;
1557         const cfg_obj_t *voptions = NULL;
1558         const cfg_obj_t *forwardtype;
1559         const cfg_obj_t *forwarders;
1560         const cfg_obj_t *alternates;
1561         const cfg_obj_t *zonelist;
1562         const cfg_obj_t *dlz;
1563         unsigned int dlzargc;
1564         char **dlzargv;
1565         const cfg_obj_t *disabled;
1566         const cfg_obj_t *obj;
1567         const cfg_listelt_t *element;
1568         in_port_t port;
1569         dns_cache_t *cache = NULL;
1570         isc_result_t result;
1571         isc_uint32_t max_adb_size;
1572         unsigned int cleaning_interval;
1573         isc_uint32_t max_cache_size;
1574         isc_uint32_t max_acache_size;
1575         isc_uint32_t lame_ttl;
1576         dns_tsig_keyring_t *ring = NULL;
1577         dns_view_t *pview = NULL;       /* Production view */
1578         isc_mem_t *cmctx = NULL, *hmctx = NULL;
1579         dns_dispatch_t *dispatch4 = NULL;
1580         dns_dispatch_t *dispatch6 = NULL;
1581         isc_boolean_t reused_cache = ISC_FALSE;
1582         isc_boolean_t shared_cache = ISC_FALSE;
1583         int i = 0, j = 0, k = 0;
1584         const char *str;
1585         const char *cachename = NULL;
1586         dns_order_t *order = NULL;
1587         isc_uint32_t udpsize;
1588         unsigned int resopts = 0;
1589         dns_zone_t *zone = NULL;
1590         isc_uint32_t max_clients_per_query;
1591         const char *sep = ": view ";
1592         const char *viewname = view->name;
1593         const char *forview = " for view ";
1594         isc_boolean_t rfc1918;
1595         isc_boolean_t empty_zones_enable;
1596         const cfg_obj_t *disablelist = NULL;
1597         isc_stats_t *resstats = NULL;
1598         dns_stats_t *resquerystats = NULL;
1599         isc_boolean_t auto_dlv = ISC_FALSE;
1600         isc_boolean_t auto_root = ISC_FALSE;
1601         ns_cache_t *nsc;
1602         isc_boolean_t zero_no_soattl;
1603         dns_acl_t *clients = NULL, *mapped = NULL, *excluded = NULL;
1604         unsigned int query_timeout;
1605         struct cfg_context *nzctx;
1606
1607         REQUIRE(DNS_VIEW_VALID(view));
1608
1609         if (config != NULL)
1610                 (void)cfg_map_get(config, "options", &options);
1611
1612         /*
1613          * maps: view options, options, defaults
1614          * cfgmaps: view options, config
1615          * optionmaps: view options, options
1616          */
1617         if (vconfig != NULL) {
1618                 voptions = cfg_tuple_get(vconfig, "options");
1619                 maps[i++] = voptions;
1620                 optionmaps[j++] = voptions;
1621                 cfgmaps[k++] = voptions;
1622         }
1623         if (options != NULL) {
1624                 maps[i++] = options;
1625                 optionmaps[j++] = options;
1626         }
1627
1628         maps[i++] = ns_g_defaults;
1629         maps[i] = NULL;
1630         optionmaps[j] = NULL;
1631         if (config != NULL)
1632                 cfgmaps[k++] = config;
1633         cfgmaps[k] = NULL;
1634
1635         if (!strcmp(viewname, "_default")) {
1636                 sep = "";
1637                 viewname = "";
1638                 forview = "";
1639                 POST(forview);
1640         }
1641
1642         /*
1643          * Set the view's port number for outgoing queries.
1644          */
1645         CHECKM(ns_config_getport(config, &port), "port");
1646         dns_view_setdstport(view, port);
1647
1648         /*
1649          * Create additional cache for this view and zones under the view
1650          * if explicitly enabled.
1651          * XXX950 default to on.
1652          */
1653         obj = NULL;
1654         (void)ns_config_get(maps, "acache-enable", &obj);
1655         if (obj != NULL && cfg_obj_asboolean(obj)) {
1656                 cmctx = NULL;
1657                 CHECK(isc_mem_create(0, 0, &cmctx));
1658                 CHECK(dns_acache_create(&view->acache, cmctx, ns_g_taskmgr,
1659                                         ns_g_timermgr));
1660                 isc_mem_setname(cmctx, "acache", NULL);
1661                 isc_mem_detach(&cmctx);
1662         }
1663         if (view->acache != NULL) {
1664                 obj = NULL;
1665                 result = ns_config_get(maps, "acache-cleaning-interval", &obj);
1666                 INSIST(result == ISC_R_SUCCESS);
1667                 dns_acache_setcleaninginterval(view->acache,
1668                                                cfg_obj_asuint32(obj) * 60);
1669
1670                 obj = NULL;
1671                 result = ns_config_get(maps, "max-acache-size", &obj);
1672                 INSIST(result == ISC_R_SUCCESS);
1673                 if (cfg_obj_isstring(obj)) {
1674                         str = cfg_obj_asstring(obj);
1675                         INSIST(strcasecmp(str, "unlimited") == 0);
1676                         max_acache_size = ISC_UINT32_MAX;
1677                 } else {
1678                         isc_resourcevalue_t value;
1679
1680                         value = cfg_obj_asuint64(obj);
1681                         if (value > ISC_UINT32_MAX) {
1682                                 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR,
1683                                             "'max-acache-size "
1684                                             "%" ISC_PRINT_QUADFORMAT
1685                                             "d' is too large",
1686                                             value);
1687                                 result = ISC_R_RANGE;
1688                                 goto cleanup;
1689                         }
1690                         max_acache_size = (isc_uint32_t)value;
1691                 }
1692                 dns_acache_setcachesize(view->acache, max_acache_size);
1693         }
1694
1695         CHECK(configure_view_acl(vconfig, config, "allow-query", NULL, actx,
1696                                  ns_g_mctx, &view->queryacl));
1697         if (view->queryacl == NULL) {
1698                 CHECK(configure_view_acl(NULL, ns_g_config, "allow-query",
1699                                          NULL, actx, ns_g_mctx,
1700                                          &view->queryacl));
1701         }
1702
1703         /*
1704          * Configure the zones.
1705          */
1706         zonelist = NULL;
1707         if (voptions != NULL)
1708                 (void)cfg_map_get(voptions, "zone", &zonelist);
1709         else
1710                 (void)cfg_map_get(config, "zone", &zonelist);
1711
1712         /*
1713          * Load zone configuration
1714          */
1715         for (element = cfg_list_first(zonelist);
1716              element != NULL;
1717              element = cfg_list_next(element))
1718         {
1719                 const cfg_obj_t *zconfig = cfg_listelt_value(element);
1720                 CHECK(configure_zone(config, zconfig, vconfig, mctx, view,
1721                                      actx, ISC_FALSE));
1722         }
1723
1724         /*
1725          * If we're allowing added zones, then load zone configuration
1726          * from the newzone file for zones that were added during previous
1727          * runs.
1728          */
1729         nzctx = view->new_zone_config;
1730         if (nzctx != NULL && nzctx->nzconfig != NULL) {
1731                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
1732                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
1733                               "loading additional zones for view '%s'",
1734                               view->name);
1735
1736                 zonelist = NULL;
1737                 cfg_map_get(nzctx->nzconfig, "zone", &zonelist);
1738
1739                 for (element = cfg_list_first(zonelist);
1740                      element != NULL;
1741                      element = cfg_list_next(element))
1742                 {
1743                         const cfg_obj_t *zconfig = cfg_listelt_value(element);
1744                         CHECK(configure_zone(config, zconfig, vconfig,
1745                                              mctx, view, actx,
1746                                              ISC_TRUE));
1747                 }
1748         }
1749
1750         /*
1751          * Create Dynamically Loadable Zone driver.
1752          */
1753         dlz = NULL;
1754         if (voptions != NULL)
1755                 (void)cfg_map_get(voptions, "dlz", &dlz);
1756         else
1757                 (void)cfg_map_get(config, "dlz", &dlz);
1758
1759         obj = NULL;
1760         if (dlz != NULL) {
1761                 (void)cfg_map_get(cfg_tuple_get(dlz, "options"),
1762                                   "database", &obj);
1763                 if (obj != NULL) {
1764                         char *s = isc_mem_strdup(mctx, cfg_obj_asstring(obj));
1765                         if (s == NULL) {
1766                                 result = ISC_R_NOMEMORY;
1767                                 goto cleanup;
1768                         }
1769
1770                         result = dns_dlzstrtoargv(mctx, s, &dlzargc, &dlzargv);
1771                         if (result != ISC_R_SUCCESS) {
1772                                 isc_mem_free(mctx, s);
1773                                 goto cleanup;
1774                         }
1775
1776                         obj = cfg_tuple_get(dlz, "name");
1777                         result = dns_dlzcreate(mctx, cfg_obj_asstring(obj),
1778                                                dlzargv[0], dlzargc, dlzargv,
1779                                                &view->dlzdatabase);
1780                         isc_mem_free(mctx, s);
1781                         isc_mem_put(mctx, dlzargv, dlzargc * sizeof(*dlzargv));
1782                         if (result != ISC_R_SUCCESS)
1783                                 goto cleanup;
1784
1785                         /*
1786                          * If the dlz backend supports configuration,
1787                          * then call its configure method now.
1788                          */
1789                         result = dns_dlzconfigure(view, dlzconfigure_callback);
1790                         if (result != ISC_R_SUCCESS)
1791                                 goto cleanup;
1792                 }
1793         }
1794
1795         /*
1796          * Obtain configuration parameters that affect the decision of whether
1797          * we can reuse/share an existing cache.
1798          */
1799         obj = NULL;
1800         result = ns_config_get(maps, "cleaning-interval", &obj);
1801         INSIST(result == ISC_R_SUCCESS);
1802         cleaning_interval = cfg_obj_asuint32(obj) * 60;
1803
1804         obj = NULL;
1805         result = ns_config_get(maps, "max-cache-size", &obj);
1806         INSIST(result == ISC_R_SUCCESS);
1807         if (cfg_obj_isstring(obj)) {
1808                 str = cfg_obj_asstring(obj);
1809                 INSIST(strcasecmp(str, "unlimited") == 0);
1810                 max_cache_size = ISC_UINT32_MAX;
1811         } else {
1812                 isc_resourcevalue_t value;
1813                 value = cfg_obj_asuint64(obj);
1814                 if (value > ISC_UINT32_MAX) {
1815                         cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR,
1816                                     "'max-cache-size "
1817                                     "%" ISC_PRINT_QUADFORMAT "d' is too large",
1818                                     value);
1819                         result = ISC_R_RANGE;
1820                         goto cleanup;
1821                 }
1822                 max_cache_size = (isc_uint32_t)value;
1823         }
1824
1825         /* Check-names. */
1826         obj = NULL;
1827         result = ns_checknames_get(maps, "response", &obj);
1828         INSIST(result == ISC_R_SUCCESS);
1829
1830         str = cfg_obj_asstring(obj);
1831         if (strcasecmp(str, "fail") == 0) {
1832                 resopts |= DNS_RESOLVER_CHECKNAMES |
1833                         DNS_RESOLVER_CHECKNAMESFAIL;
1834                 view->checknames = ISC_TRUE;
1835         } else if (strcasecmp(str, "warn") == 0) {
1836                 resopts |= DNS_RESOLVER_CHECKNAMES;
1837                 view->checknames = ISC_FALSE;
1838         } else if (strcasecmp(str, "ignore") == 0) {
1839                 view->checknames = ISC_FALSE;
1840         } else
1841                 INSIST(0);
1842
1843         obj = NULL;
1844         result = ns_config_get(maps, "zero-no-soa-ttl-cache", &obj);
1845         INSIST(result == ISC_R_SUCCESS);
1846         zero_no_soattl = cfg_obj_asboolean(obj);
1847
1848         obj = NULL;
1849         result = ns_config_get(maps, "dns64", &obj);
1850         if (result == ISC_R_SUCCESS && strcmp(view->name, "_bind") &&
1851             strcmp(view->name, "_meta")) {
1852                 const cfg_listelt_t *element;
1853                 isc_netaddr_t na, suffix, *sp;
1854                 unsigned int prefixlen;
1855                 const char *server, *contact;
1856                 const cfg_obj_t *myobj;
1857
1858                 myobj = NULL;
1859                 result = ns_config_get(maps, "dns64-server", &myobj);
1860                 if (result == ISC_R_SUCCESS)
1861                         server = cfg_obj_asstring(myobj);
1862                 else
1863                         server = NULL;
1864
1865                 myobj = NULL;
1866                 result = ns_config_get(maps, "dns64-contact", &myobj);
1867                 if (result == ISC_R_SUCCESS)
1868                         contact = cfg_obj_asstring(myobj);
1869                 else
1870                         contact = NULL;
1871
1872                 for (element = cfg_list_first(obj);
1873                      element != NULL;
1874                      element = cfg_list_next(element))
1875                 {
1876                         const cfg_obj_t *map = cfg_listelt_value(element);
1877                         dns_dns64_t *dns64 = NULL;
1878                         unsigned int dns64options = 0;
1879
1880                         cfg_obj_asnetprefix(cfg_map_getname(map), &na,
1881                                             &prefixlen);
1882
1883                         obj = NULL;
1884                         (void)cfg_map_get(map, "suffix", &obj);
1885                         if (obj != NULL) {
1886                                 sp = &suffix;
1887                                 isc_netaddr_fromsockaddr(sp,
1888                                                       cfg_obj_assockaddr(obj));
1889                         } else
1890                                 sp = NULL;
1891
1892                         clients = mapped = excluded = NULL;
1893                         obj = NULL;
1894                         (void)cfg_map_get(map, "clients", &obj);
1895                         if (obj != NULL) {
1896                                 result = cfg_acl_fromconfig(obj, config,
1897                                                             ns_g_lctx, actx,
1898                                                             mctx, 0, &clients);
1899                                 if (result != ISC_R_SUCCESS)
1900                                         goto cleanup;
1901                         }
1902                         obj = NULL;
1903                         (void)cfg_map_get(map, "mapped", &obj);
1904                         if (obj != NULL) {
1905                                 result = cfg_acl_fromconfig(obj, config,
1906                                                             ns_g_lctx, actx,
1907                                                             mctx, 0, &mapped);
1908                                 if (result != ISC_R_SUCCESS)
1909                                         goto cleanup;
1910                         }
1911                         obj = NULL;
1912                         (void)cfg_map_get(map, "exclude", &obj);
1913                         if (obj != NULL) {
1914                                 result = cfg_acl_fromconfig(obj, config,
1915                                                             ns_g_lctx, actx,
1916                                                             mctx, 0, &excluded);
1917                                 if (result != ISC_R_SUCCESS)
1918                                         goto cleanup;
1919                         }
1920
1921                         obj = NULL;
1922                         (void)cfg_map_get(map, "recursive-only", &obj);
1923                         if (obj != NULL && cfg_obj_asboolean(obj))
1924                                 dns64options |= DNS_DNS64_RECURSIVE_ONLY;
1925
1926                         obj = NULL;
1927                         (void)cfg_map_get(map, "break-dnssec", &obj);
1928                         if (obj != NULL && cfg_obj_asboolean(obj))
1929                                 dns64options |= DNS_DNS64_BREAK_DNSSEC;
1930
1931                         result = dns_dns64_create(mctx, &na, prefixlen, sp,
1932                                                   clients, mapped, excluded,
1933                                                   dns64options, &dns64);
1934                         if (result != ISC_R_SUCCESS)
1935                                 goto cleanup;
1936                         dns_dns64_append(&view->dns64, dns64);
1937                         view->dns64cnt++;
1938                         result = dns64_reverse(view, mctx, &na, prefixlen,
1939                                                server, contact);
1940                         if (result != ISC_R_SUCCESS)
1941                                 goto cleanup;
1942                         if (clients != NULL)
1943                                 dns_acl_detach(&clients);
1944                         if (mapped != NULL)
1945                                 dns_acl_detach(&mapped);
1946                         if (excluded != NULL)
1947                                 dns_acl_detach(&excluded);
1948                 }
1949         }
1950
1951         obj = NULL;
1952         result = ns_config_get(maps, "dnssec-accept-expired", &obj);
1953         INSIST(result == ISC_R_SUCCESS);
1954         view->acceptexpired = cfg_obj_asboolean(obj);
1955
1956         obj = NULL;
1957         result = ns_config_get(maps, "dnssec-validation", &obj);
1958         INSIST(result == ISC_R_SUCCESS);
1959         if (cfg_obj_isboolean(obj)) {
1960                 view->enablevalidation = cfg_obj_asboolean(obj);
1961         } else {
1962                 /* If dnssec-validation is not boolean, it must be "auto" */
1963                 view->enablevalidation = ISC_TRUE;
1964                 auto_root = ISC_TRUE;
1965         }
1966
1967         obj = NULL;
1968         result = ns_config_get(maps, "max-cache-ttl", &obj);
1969         INSIST(result == ISC_R_SUCCESS);
1970         view->maxcachettl = cfg_obj_asuint32(obj);
1971
1972         obj = NULL;
1973         result = ns_config_get(maps, "max-ncache-ttl", &obj);
1974         INSIST(result == ISC_R_SUCCESS);
1975         view->maxncachettl = cfg_obj_asuint32(obj);
1976         if (view->maxncachettl > 7 * 24 * 3600)
1977                 view->maxncachettl = 7 * 24 * 3600;
1978
1979         /*
1980          * Configure the view's cache.
1981          *
1982          * First, check to see if there are any attach-cache options.  If yes,
1983          * attempt to lookup an existing cache at attach it to the view.  If
1984          * there is not one, then try to reuse an existing cache if possible;
1985          * otherwise create a new cache.
1986          *
1987          * Note that the ADB is not preserved or shared in either case.
1988          *
1989          * When a matching view is found, the associated statistics are also
1990          * retrieved and reused.
1991          *
1992          * XXX Determining when it is safe to reuse or share a cache is tricky.
1993          * When the view's configuration changes, the cached data may become
1994          * invalid because it reflects our old view of the world.  We check
1995          * some of the configuration parameters that could invalidate the cache
1996          * or otherwise make it unsharable, but there are other configuration
1997          * options that should be checked.  For example, if a view uses a
1998          * forwarder, changes in the forwarder configuration may invalidate
1999          * the cache.  At the moment, it's the administrator's responsibility to
2000          * ensure these configuration options don't invalidate reusing/sharing.
2001          */
2002         obj = NULL;
2003         result = ns_config_get(maps, "attach-cache", &obj);
2004         if (result == ISC_R_SUCCESS)
2005                 cachename = cfg_obj_asstring(obj);
2006         else
2007                 cachename = view->name;
2008         cache = NULL;
2009         nsc = cachelist_find(cachelist, cachename);
2010         if (nsc != NULL) {
2011                 if (!cache_sharable(nsc->primaryview, view, zero_no_soattl,
2012                                     cleaning_interval, max_cache_size)) {
2013                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
2014                                       NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
2015                                       "views %s and %s can't share the cache "
2016                                       "due to configuration parameter mismatch",
2017                                       nsc->primaryview->name, view->name);
2018                         result = ISC_R_FAILURE;
2019                         goto cleanup;
2020                 }
2021                 dns_cache_attach(nsc->cache, &cache);
2022                 shared_cache = ISC_TRUE;
2023         } else {
2024                 if (strcmp(cachename, view->name) == 0) {
2025                         result = dns_viewlist_find(&ns_g_server->viewlist,
2026                                                    cachename, view->rdclass,
2027                                                    &pview);
2028                         if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
2029                                 goto cleanup;
2030                         if (pview != NULL) {
2031                                 if (!cache_reusable(pview, view,
2032                                                     zero_no_soattl)) {
2033                                         isc_log_write(ns_g_lctx,
2034                                                       NS_LOGCATEGORY_GENERAL,
2035                                                       NS_LOGMODULE_SERVER,
2036                                                       ISC_LOG_DEBUG(1),
2037                                                       "cache cannot be reused "
2038                                                       "for view %s due to "
2039                                                       "configuration parameter "
2040                                                       "mismatch", view->name);
2041                                 } else {
2042                                         INSIST(pview->cache != NULL);
2043                                         isc_log_write(ns_g_lctx,
2044                                                       NS_LOGCATEGORY_GENERAL,
2045                                                       NS_LOGMODULE_SERVER,
2046                                                       ISC_LOG_DEBUG(3),
2047                                                       "reusing existing cache");
2048                                         reused_cache = ISC_TRUE;
2049                                         dns_cache_attach(pview->cache, &cache);
2050                                 }
2051                                 dns_view_getresstats(pview, &resstats);
2052                                 dns_view_getresquerystats(pview,
2053                                                           &resquerystats);
2054                                 dns_view_detach(&pview);
2055                         }
2056                 }
2057                 if (cache == NULL) {
2058                         /*
2059                          * Create a cache with the desired name.  This normally
2060                          * equals the view name, but may also be a forward
2061                          * reference to a view that share the cache with this
2062                          * view but is not yet configured.  If it is not the
2063                          * view name but not a forward reference either, then it
2064                          * is simply a named cache that is not shared.
2065                          *
2066                          * We use two separate memory contexts for the
2067                          * cache, for the main cache memory and the heap
2068                          * memory.
2069                          */
2070                         CHECK(isc_mem_create(0, 0, &cmctx));
2071                         isc_mem_setname(cmctx, "cache", NULL);
2072                         CHECK(isc_mem_create(0, 0, &hmctx));
2073                         isc_mem_setname(hmctx, "cache_heap", NULL);
2074                         CHECK(dns_cache_create3(cmctx, hmctx, ns_g_taskmgr,
2075                                                 ns_g_timermgr, view->rdclass,
2076                                                 cachename, "rbt", 0, NULL,
2077                                                 &cache));
2078                         isc_mem_detach(&cmctx);
2079                         isc_mem_detach(&hmctx);
2080                 }
2081                 nsc = isc_mem_get(mctx, sizeof(*nsc));
2082                 if (nsc == NULL) {
2083                         result = ISC_R_NOMEMORY;
2084                         goto cleanup;
2085                 }
2086                 nsc->cache = NULL;
2087                 dns_cache_attach(cache, &nsc->cache);
2088                 nsc->primaryview = view;
2089                 nsc->needflush = ISC_FALSE;
2090                 nsc->adbsizeadjusted = ISC_FALSE;
2091                 ISC_LINK_INIT(nsc, link);
2092                 ISC_LIST_APPEND(*cachelist, nsc, link);
2093         }
2094         dns_view_setcache2(view, cache, shared_cache);
2095
2096         /*
2097          * cache-file cannot be inherited if views are present, but this
2098          * should be caught by the configuration checking stage.
2099          */
2100         obj = NULL;
2101         result = ns_config_get(maps, "cache-file", &obj);
2102         if (result == ISC_R_SUCCESS && strcmp(view->name, "_bind") != 0) {
2103                 CHECK(dns_cache_setfilename(cache, cfg_obj_asstring(obj)));
2104                 if (!reused_cache && !shared_cache)
2105                         CHECK(dns_cache_load(cache));
2106         }
2107
2108         dns_cache_setcleaninginterval(cache, cleaning_interval);
2109         dns_cache_setcachesize(cache, max_cache_size);
2110
2111         dns_cache_detach(&cache);
2112
2113         /*
2114          * Resolver.
2115          *
2116          * XXXRTH  Hardwired number of tasks.
2117          */
2118         CHECK(get_view_querysource_dispatch(maps, AF_INET, &dispatch4,
2119                                             ISC_TF(ISC_LIST_PREV(view, link)
2120                                                    == NULL)));
2121         CHECK(get_view_querysource_dispatch(maps, AF_INET6, &dispatch6,
2122                                             ISC_TF(ISC_LIST_PREV(view, link)
2123                                                    == NULL)));
2124         if (dispatch4 == NULL && dispatch6 == NULL) {
2125                 UNEXPECTED_ERROR(__FILE__, __LINE__,
2126                                  "unable to obtain neither an IPv4 nor"
2127                                  " an IPv6 dispatch");
2128                 result = ISC_R_UNEXPECTED;
2129                 goto cleanup;
2130         }
2131         CHECK(dns_view_createresolver(view, ns_g_taskmgr, 31,
2132                                       ns_g_socketmgr, ns_g_timermgr,
2133                                       resopts, ns_g_dispatchmgr,
2134                                       dispatch4, dispatch6));
2135
2136         if (resstats == NULL) {
2137                 CHECK(isc_stats_create(mctx, &resstats,
2138                                        dns_resstatscounter_max));
2139         }
2140         dns_view_setresstats(view, resstats);
2141         if (resquerystats == NULL)
2142                 CHECK(dns_rdatatypestats_create(mctx, &resquerystats));
2143         dns_view_setresquerystats(view, resquerystats);
2144
2145         /*
2146          * Set the ADB cache size to 1/8th of the max-cache-size or
2147          * MAX_ADB_SIZE_FOR_CACHESHARE when the cache is shared.
2148          */
2149         max_adb_size = 0;
2150         if (max_cache_size != 0) {
2151                 max_adb_size = max_cache_size / 8;
2152                 if (max_adb_size == 0)
2153                         max_adb_size = 1;       /* Force minimum. */
2154                 if (view != nsc->primaryview &&
2155                     max_adb_size > MAX_ADB_SIZE_FOR_CACHESHARE) {
2156                         max_adb_size = MAX_ADB_SIZE_FOR_CACHESHARE;
2157                         if (!nsc->adbsizeadjusted) {
2158                                 dns_adb_setadbsize(nsc->primaryview->adb,
2159                                                    MAX_ADB_SIZE_FOR_CACHESHARE);
2160                                 nsc->adbsizeadjusted = ISC_TRUE;
2161                         }
2162                 }
2163         }
2164         dns_adb_setadbsize(view->adb, max_adb_size);
2165
2166         /*
2167          * Set resolver's lame-ttl.
2168          */
2169         obj = NULL;
2170         result = ns_config_get(maps, "lame-ttl", &obj);
2171         INSIST(result == ISC_R_SUCCESS);
2172         lame_ttl = cfg_obj_asuint32(obj);
2173         if (lame_ttl > 1800)
2174                 lame_ttl = 1800;
2175         dns_resolver_setlamettl(view->resolver, lame_ttl);
2176
2177         /*
2178          * Set the resolver's query timeout.
2179          */
2180         obj = NULL;
2181         result = ns_config_get(maps, "resolver-query-timeout", &obj);
2182         INSIST(result == ISC_R_SUCCESS);
2183         query_timeout = cfg_obj_asuint32(obj);
2184         dns_resolver_settimeout(view->resolver, query_timeout);
2185
2186         /* Specify whether to use 0-TTL for negative response for SOA query */
2187         dns_resolver_setzeronosoattl(view->resolver, zero_no_soattl);
2188
2189         /*
2190          * Set the resolver's EDNS UDP size.
2191          */
2192         obj = NULL;
2193         result = ns_config_get(maps, "edns-udp-size", &obj);
2194         INSIST(result == ISC_R_SUCCESS);
2195         udpsize = cfg_obj_asuint32(obj);
2196         if (udpsize < 512)
2197                 udpsize = 512;
2198         if (udpsize > 4096)
2199                 udpsize = 4096;
2200         dns_resolver_setudpsize(view->resolver, (isc_uint16_t)udpsize);
2201
2202         /*
2203          * Set the maximum UDP response size.
2204          */
2205         obj = NULL;
2206         result = ns_config_get(maps, "max-udp-size", &obj);
2207         INSIST(result == ISC_R_SUCCESS);
2208         udpsize = cfg_obj_asuint32(obj);
2209         if (udpsize < 512)
2210                 udpsize = 512;
2211         if (udpsize > 4096)
2212                 udpsize = 4096;
2213         view->maxudp = udpsize;
2214
2215         /*
2216          * Set supported DNSSEC algorithms.
2217          */
2218         dns_resolver_reset_algorithms(view->resolver);
2219         disabled = NULL;
2220         (void)ns_config_get(maps, "disable-algorithms", &disabled);
2221         if (disabled != NULL) {
2222                 for (element = cfg_list_first(disabled);
2223                      element != NULL;
2224                      element = cfg_list_next(element))
2225                         CHECK(disable_algorithms(cfg_listelt_value(element),
2226                                                  view->resolver));
2227         }
2228
2229         /*
2230          * A global or view "forwarders" option, if present,
2231          * creates an entry for "." in the forwarding table.
2232          */
2233         forwardtype = NULL;
2234         forwarders = NULL;
2235         (void)ns_config_get(maps, "forward", &forwardtype);
2236         (void)ns_config_get(maps, "forwarders", &forwarders);
2237         if (forwarders != NULL)
2238                 CHECK(configure_forward(config, view, dns_rootname,
2239                                         forwarders, forwardtype));
2240
2241         /*
2242          * Dual Stack Servers.
2243          */
2244         alternates = NULL;
2245         (void)ns_config_get(maps, "dual-stack-servers", &alternates);
2246         if (alternates != NULL)
2247                 CHECK(configure_alternates(config, view, alternates));
2248
2249         /*
2250          * We have default hints for class IN if we need them.
2251          */
2252         if (view->rdclass == dns_rdataclass_in && view->hints == NULL)
2253                 dns_view_sethints(view, ns_g_server->in_roothints);
2254
2255         /*
2256          * If we still have no hints, this is a non-IN view with no
2257          * "hints zone" configured.  Issue a warning, except if this
2258          * is a root server.  Root servers never need to consult
2259          * their hints, so it's no point requiring users to configure
2260          * them.
2261          */
2262         if (view->hints == NULL) {
2263                 dns_zone_t *rootzone = NULL;
2264                 (void)dns_view_findzone(view, dns_rootname, &rootzone);
2265                 if (rootzone != NULL) {
2266                         dns_zone_detach(&rootzone);
2267                         need_hints = ISC_FALSE;
2268                 }
2269                 if (need_hints)
2270                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
2271                                       NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
2272                                       "no root hints for view '%s'",
2273                                       view->name);
2274         }
2275
2276         /*
2277          * Configure the view's TSIG keys.
2278          */
2279         CHECK(ns_tsigkeyring_fromconfig(config, vconfig, view->mctx, &ring));
2280         if (ns_g_server->sessionkey != NULL) {
2281                 CHECK(dns_tsigkeyring_add(ring, ns_g_server->session_keyname,
2282                                           ns_g_server->sessionkey));
2283         }
2284         dns_view_setkeyring(view, ring);
2285         dns_tsigkeyring_detach(&ring);
2286
2287         /*
2288          * See if we can re-use a dynamic key ring.
2289          */
2290         result = dns_viewlist_find(&ns_g_server->viewlist, view->name,
2291                                    view->rdclass, &pview);
2292         if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
2293                 goto cleanup;
2294         if (pview != NULL) {
2295                 dns_view_getdynamickeyring(pview, &ring);
2296                 if (ring != NULL)
2297                         dns_view_setdynamickeyring(view, ring);
2298                 dns_tsigkeyring_detach(&ring);
2299                 dns_view_detach(&pview);
2300         } else
2301                 dns_view_restorekeyring(view);
2302
2303         /*
2304          * Configure the view's peer list.
2305          */
2306         {
2307                 const cfg_obj_t *peers = NULL;
2308                 const cfg_listelt_t *element;
2309                 dns_peerlist_t *newpeers = NULL;
2310
2311                 (void)ns_config_get(cfgmaps, "server", &peers);
2312                 CHECK(dns_peerlist_new(mctx, &newpeers));
2313                 for (element = cfg_list_first(peers);
2314                      element != NULL;
2315                      element = cfg_list_next(element))
2316                 {
2317                         const cfg_obj_t *cpeer = cfg_listelt_value(element);
2318                         dns_peer_t *peer;
2319
2320                         CHECK(configure_peer(cpeer, mctx, &peer));
2321                         dns_peerlist_addpeer(newpeers, peer);
2322                         dns_peer_detach(&peer);
2323                 }
2324                 dns_peerlist_detach(&view->peers);
2325                 view->peers = newpeers; /* Transfer ownership. */
2326         }
2327
2328         /*
2329          *      Configure the views rrset-order.
2330          */
2331         {
2332                 const cfg_obj_t *rrsetorder = NULL;
2333                 const cfg_listelt_t *element;
2334
2335                 (void)ns_config_get(maps, "rrset-order", &rrsetorder);
2336                 CHECK(dns_order_create(mctx, &order));
2337                 for (element = cfg_list_first(rrsetorder);
2338                      element != NULL;
2339                      element = cfg_list_next(element))
2340                 {
2341                         const cfg_obj_t *ent = cfg_listelt_value(element);
2342
2343                         CHECK(configure_order(order, ent));
2344                 }
2345                 if (view->order != NULL)
2346                         dns_order_detach(&view->order);
2347                 dns_order_attach(order, &view->order);
2348                 dns_order_detach(&order);
2349         }
2350         /*
2351          * Copy the aclenv object.
2352          */
2353         dns_aclenv_copy(&view->aclenv, &ns_g_server->aclenv);
2354
2355         /*
2356          * Configure the "match-clients" and "match-destinations" ACL.
2357          */
2358         CHECK(configure_view_acl(vconfig, config, "match-clients", NULL, actx,
2359                                  ns_g_mctx, &view->matchclients));
2360         CHECK(configure_view_acl(vconfig, config, "match-destinations", NULL,
2361                                  actx, ns_g_mctx, &view->matchdestinations));
2362
2363         /*
2364          * Configure the "match-recursive-only" option.
2365          */
2366         obj = NULL;
2367         (void)ns_config_get(maps, "match-recursive-only", &obj);
2368         if (obj != NULL && cfg_obj_asboolean(obj))
2369                 view->matchrecursiveonly = ISC_TRUE;
2370         else
2371                 view->matchrecursiveonly = ISC_FALSE;
2372
2373         /*
2374          * Configure other configurable data.
2375          */
2376         obj = NULL;
2377         result = ns_config_get(maps, "recursion", &obj);
2378         INSIST(result == ISC_R_SUCCESS);
2379         view->recursion = cfg_obj_asboolean(obj);
2380
2381         obj = NULL;
2382         result = ns_config_get(maps, "auth-nxdomain", &obj);
2383         INSIST(result == ISC_R_SUCCESS);
2384         view->auth_nxdomain = cfg_obj_asboolean(obj);
2385
2386         obj = NULL;
2387         result = ns_config_get(maps, "minimal-responses", &obj);
2388         INSIST(result == ISC_R_SUCCESS);
2389         view->minimalresponses = cfg_obj_asboolean(obj);
2390
2391         obj = NULL;
2392         result = ns_config_get(maps, "transfer-format", &obj);
2393         INSIST(result == ISC_R_SUCCESS);
2394         str = cfg_obj_asstring(obj);
2395         if (strcasecmp(str, "many-answers") == 0)
2396                 view->transfer_format = dns_many_answers;
2397         else if (strcasecmp(str, "one-answer") == 0)
2398                 view->transfer_format = dns_one_answer;
2399         else
2400                 INSIST(0);
2401
2402         /*
2403          * Set sources where additional data and CNAME/DNAME
2404          * targets for authoritative answers may be found.
2405          */
2406         obj = NULL;
2407         result = ns_config_get(maps, "additional-from-auth", &obj);
2408         INSIST(result == ISC_R_SUCCESS);
2409         view->additionalfromauth = cfg_obj_asboolean(obj);
2410         if (view->recursion && ! view->additionalfromauth) {
2411                 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_WARNING,
2412                             "'additional-from-auth no' is only supported "
2413                             "with 'recursion no'");
2414                 view->additionalfromauth = ISC_TRUE;
2415         }
2416
2417         obj = NULL;
2418         result = ns_config_get(maps, "additional-from-cache", &obj);
2419         INSIST(result == ISC_R_SUCCESS);
2420         view->additionalfromcache = cfg_obj_asboolean(obj);
2421         if (view->recursion && ! view->additionalfromcache) {
2422                 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_WARNING,
2423                             "'additional-from-cache no' is only supported "
2424                             "with 'recursion no'");
2425                 view->additionalfromcache = ISC_TRUE;
2426         }
2427
2428         /*
2429          * Set "allow-query-cache", "allow-query-cache-on",
2430          * "allow-recursion", and "allow-recursion-on" acls if
2431          * configured in named.conf.
2432          */
2433         CHECK(configure_view_acl(vconfig, config, "allow-query-cache", NULL,
2434                                  actx, ns_g_mctx, &view->cacheacl));
2435         CHECK(configure_view_acl(vconfig, config, "allow-query-cache-on", NULL,
2436                                  actx, ns_g_mctx, &view->cacheonacl));
2437         if (view->cacheonacl == NULL)
2438                 CHECK(configure_view_acl(NULL, ns_g_config,
2439                                          "allow-query-cache-on", NULL, actx,
2440                                          ns_g_mctx, &view->cacheonacl));
2441         if (strcmp(view->name, "_bind") != 0) {
2442                 CHECK(configure_view_acl(vconfig, config, "allow-recursion",
2443                                          NULL, actx, ns_g_mctx,
2444                                          &view->recursionacl));
2445                 CHECK(configure_view_acl(vconfig, config, "allow-recursion-on",
2446                                          NULL, actx, ns_g_mctx,
2447                                          &view->recursiononacl));
2448         }
2449
2450         /*
2451          * "allow-query-cache" inherits from "allow-recursion" if set,
2452          * otherwise from "allow-query" if set.
2453          * "allow-recursion" inherits from "allow-query-cache" if set,
2454          * otherwise from "allow-query" if set.
2455          */
2456         if (view->cacheacl == NULL && view->recursionacl != NULL)
2457                 dns_acl_attach(view->recursionacl, &view->cacheacl);
2458         /*
2459          * XXXEACH: This call to configure_view_acl() is redundant.  We
2460          * are leaving it as it is because we are making a minimal change
2461          * for a patch release.  In the future this should be changed to
2462          * dns_acl_attach(view->queryacl, &view->cacheacl).
2463          */
2464         if (view->cacheacl == NULL && view->recursion)
2465                 CHECK(configure_view_acl(vconfig, config, "allow-query", NULL,
2466                                          actx, ns_g_mctx, &view->cacheacl));
2467         if (view->recursion &&
2468             view->recursionacl == NULL && view->cacheacl != NULL)
2469                 dns_acl_attach(view->cacheacl, &view->recursionacl);
2470
2471         /*
2472          * Set default "allow-recursion", "allow-recursion-on" and
2473          * "allow-query-cache" acls.
2474          */
2475         if (view->recursionacl == NULL && view->recursion)
2476                 CHECK(configure_view_acl(NULL, ns_g_config,
2477                                          "allow-recursion", NULL,
2478                                          actx, ns_g_mctx,
2479                                          &view->recursionacl));
2480         if (view->recursiononacl == NULL && view->recursion)
2481                 CHECK(configure_view_acl(NULL, ns_g_config,
2482                                          "allow-recursion-on", NULL,
2483                                          actx, ns_g_mctx,
2484                                          &view->recursiononacl));
2485         if (view->cacheacl == NULL) {
2486                 if (view->recursion)
2487                         CHECK(configure_view_acl(NULL, ns_g_config,
2488                                                  "allow-query-cache", NULL,
2489                                                  actx, ns_g_mctx,
2490                                                  &view->cacheacl));
2491                 else
2492                         CHECK(dns_acl_none(mctx, &view->cacheacl));
2493         }
2494
2495         /*
2496          * Filter setting on addresses in the answer section.
2497          */
2498         CHECK(configure_view_acl(vconfig, config, "deny-answer-addresses",
2499                                  "acl", actx, ns_g_mctx, &view->denyansweracl));
2500         CHECK(configure_view_nametable(vconfig, config, "deny-answer-addresses",
2501                                        "except-from", ns_g_mctx,
2502                                        &view->answeracl_exclude));
2503
2504         /*
2505          * Filter setting on names (CNAME/DNAME targets) in the answer section.
2506          */
2507         CHECK(configure_view_nametable(vconfig, config, "deny-answer-aliases",
2508                                        "name", ns_g_mctx,
2509                                        &view->denyanswernames));
2510         CHECK(configure_view_nametable(vconfig, config, "deny-answer-aliases",
2511                                        "except-from", ns_g_mctx,
2512                                        &view->answernames_exclude));
2513
2514         /*
2515          * Configure sortlist, if set
2516          */
2517         CHECK(configure_view_sortlist(vconfig, config, actx, ns_g_mctx,
2518                                       &view->sortlist));
2519
2520         /*
2521          * Configure default allow-transfer, allow-notify, allow-update
2522          * and allow-update-forwarding ACLs, if set, so they can be
2523          * inherited by zones.
2524          */
2525         if (view->notifyacl == NULL)
2526                 CHECK(configure_view_acl(NULL, ns_g_config,
2527                                          "allow-notify", NULL, actx,
2528                                          ns_g_mctx, &view->notifyacl));
2529         if (view->transferacl == NULL)
2530                 CHECK(configure_view_acl(NULL, ns_g_config,
2531                                          "allow-transfer", NULL, actx,
2532                                          ns_g_mctx, &view->transferacl));
2533         if (view->updateacl == NULL)
2534                 CHECK(configure_view_acl(NULL, ns_g_config,
2535                                          "allow-update", NULL, actx,
2536                                          ns_g_mctx, &view->updateacl));
2537         if (view->upfwdacl == NULL)
2538                 CHECK(configure_view_acl(NULL, ns_g_config,
2539                                          "allow-update-forwarding", NULL, actx,
2540                                          ns_g_mctx, &view->upfwdacl));
2541
2542         obj = NULL;
2543         result = ns_config_get(maps, "request-ixfr", &obj);
2544         INSIST(result == ISC_R_SUCCESS);
2545         view->requestixfr = cfg_obj_asboolean(obj);
2546
2547         obj = NULL;
2548         result = ns_config_get(maps, "provide-ixfr", &obj);
2549         INSIST(result == ISC_R_SUCCESS);
2550         view->provideixfr = cfg_obj_asboolean(obj);
2551
2552         obj = NULL;
2553         result = ns_config_get(maps, "request-nsid", &obj);
2554         INSIST(result == ISC_R_SUCCESS);
2555         view->requestnsid = cfg_obj_asboolean(obj);
2556
2557         obj = NULL;
2558         result = ns_config_get(maps, "max-clients-per-query", &obj);
2559         INSIST(result == ISC_R_SUCCESS);
2560         max_clients_per_query = cfg_obj_asuint32(obj);
2561
2562         obj = NULL;
2563         result = ns_config_get(maps, "clients-per-query", &obj);
2564         INSIST(result == ISC_R_SUCCESS);
2565         dns_resolver_setclientsperquery(view->resolver,
2566                                         cfg_obj_asuint32(obj),
2567                                         max_clients_per_query);
2568
2569 #ifdef ALLOW_FILTER_AAAA_ON_V4
2570         obj = NULL;
2571         result = ns_config_get(maps, "filter-aaaa-on-v4", &obj);
2572         INSIST(result == ISC_R_SUCCESS);
2573         if (cfg_obj_isboolean(obj)) {
2574                 if (cfg_obj_asboolean(obj))
2575                         view->v4_aaaa = dns_v4_aaaa_filter;
2576                 else
2577                         view->v4_aaaa = dns_v4_aaaa_ok;
2578         } else {
2579                 const char *v4_aaaastr = cfg_obj_asstring(obj);
2580                 if (strcasecmp(v4_aaaastr, "break-dnssec") == 0)
2581                         view->v4_aaaa = dns_v4_aaaa_break_dnssec;
2582                 else
2583                         INSIST(0);
2584         }
2585         CHECK(configure_view_acl(vconfig, config, "filter-aaaa", NULL,
2586                                  actx, ns_g_mctx, &view->v4_aaaa_acl));
2587 #endif
2588
2589         obj = NULL;
2590         result = ns_config_get(maps, "dnssec-enable", &obj);
2591         INSIST(result == ISC_R_SUCCESS);
2592         view->enablednssec = cfg_obj_asboolean(obj);
2593
2594         obj = NULL;
2595         result = ns_config_get(optionmaps, "dnssec-lookaside", &obj);
2596         if (result == ISC_R_SUCCESS) {
2597                 /* If set to "auto", use the version from the defaults */
2598                 const cfg_obj_t *dlvobj;
2599                 const char *dom;
2600                 dlvobj = cfg_listelt_value(cfg_list_first(obj));
2601                 dom = cfg_obj_asstring(cfg_tuple_get(dlvobj, "domain"));
2602                 if (cfg_obj_isvoid(cfg_tuple_get(dlvobj, "trust-anchor"))) {
2603                         /* If "no", skip; if "auto", use global default */
2604                         if (!strcasecmp(dom, "no"))
2605                                 result = ISC_R_NOTFOUND;
2606                         else if (!strcasecmp(dom, "auto")) {
2607                                 auto_dlv = ISC_TRUE;
2608                                 obj = NULL;
2609                                 result = cfg_map_get(ns_g_defaults,
2610                                                      "dnssec-lookaside", &obj);
2611                         }
2612                 }
2613         }
2614
2615         if (result == ISC_R_SUCCESS) {
2616                 for (element = cfg_list_first(obj);
2617                      element != NULL;
2618                      element = cfg_list_next(element))
2619                 {
2620                         const char *str;
2621                         isc_buffer_t b;
2622                         dns_name_t *dlv;
2623
2624                         obj = cfg_listelt_value(element);
2625                         str = cfg_obj_asstring(cfg_tuple_get(obj,
2626                                                              "trust-anchor"));
2627                         isc_buffer_init(&b, str, strlen(str));
2628                         isc_buffer_add(&b, strlen(str));
2629                         dlv = dns_fixedname_name(&view->dlv_fixed);
2630                         CHECK(dns_name_fromtext(dlv, &b, dns_rootname,
2631                                                 DNS_NAME_DOWNCASE, NULL));
2632                         view->dlv = dns_fixedname_name(&view->dlv_fixed);
2633                 }
2634         } else
2635                 view->dlv = NULL;
2636
2637         /*
2638          * For now, there is only one kind of trusted keys, the
2639          * "security roots".
2640          */
2641         CHECK(configure_view_dnsseckeys(view, vconfig, config, bindkeys,
2642                                         auto_dlv, auto_root, mctx));
2643         dns_resolver_resetmustbesecure(view->resolver);
2644         obj = NULL;
2645         result = ns_config_get(maps, "dnssec-must-be-secure", &obj);
2646         if (result == ISC_R_SUCCESS)
2647                 CHECK(mustbesecure(obj, view->resolver));
2648
2649         obj = NULL;
2650         result = ns_config_get(maps, "preferred-glue", &obj);
2651         if (result == ISC_R_SUCCESS) {
2652                 str = cfg_obj_asstring(obj);
2653                 if (strcasecmp(str, "a") == 0)
2654                         view->preferred_glue = dns_rdatatype_a;
2655                 else if (strcasecmp(str, "aaaa") == 0)
2656                         view->preferred_glue = dns_rdatatype_aaaa;
2657                 else
2658                         view->preferred_glue = 0;
2659         } else
2660                 view->preferred_glue = 0;
2661
2662         obj = NULL;
2663         result = ns_config_get(maps, "root-delegation-only", &obj);
2664         if (result == ISC_R_SUCCESS) {
2665                 dns_view_setrootdelonly(view, ISC_TRUE);
2666                 if (!cfg_obj_isvoid(obj)) {
2667                         dns_fixedname_t fixed;
2668                         dns_name_t *name;
2669                         isc_buffer_t b;
2670                         const char *str;
2671                         const cfg_obj_t *exclude;
2672
2673                         dns_fixedname_init(&fixed);
2674                         name = dns_fixedname_name(&fixed);
2675                         for (element = cfg_list_first(obj);
2676                              element != NULL;
2677                              element = cfg_list_next(element)) {
2678                                 exclude = cfg_listelt_value(element);
2679                                 str = cfg_obj_asstring(exclude);
2680                                 isc_buffer_init(&b, str, strlen(str));
2681                                 isc_buffer_add(&b, strlen(str));
2682                                 CHECK(dns_name_fromtext(name, &b, dns_rootname,
2683                                                         0, NULL));
2684                                 CHECK(dns_view_excludedelegationonly(view,
2685                                                                      name));
2686                         }
2687                 }
2688         } else
2689                 dns_view_setrootdelonly(view, ISC_FALSE);
2690
2691         /*
2692          * Setup automatic empty zones.  If recursion is off then
2693          * they are disabled by default.
2694          */
2695         obj = NULL;
2696         (void)ns_config_get(maps, "empty-zones-enable", &obj);
2697         (void)ns_config_get(maps, "disable-empty-zone", &disablelist);
2698         if (obj == NULL && disablelist == NULL &&
2699             view->rdclass == dns_rdataclass_in) {
2700                 rfc1918 = ISC_FALSE;
2701                 empty_zones_enable = view->recursion;
2702         } else if (view->rdclass == dns_rdataclass_in) {
2703                 rfc1918 = ISC_TRUE;
2704                 if (obj != NULL)
2705                         empty_zones_enable = cfg_obj_asboolean(obj);
2706                 else
2707                         empty_zones_enable = view->recursion;
2708         } else {
2709                 rfc1918 = ISC_FALSE;
2710                 empty_zones_enable = ISC_FALSE;
2711         }
2712         if (empty_zones_enable && !lwresd_g_useresolvconf) {
2713                 const char *empty;
2714                 int empty_zone = 0;
2715                 dns_fixedname_t fixed;
2716                 dns_name_t *name;
2717                 isc_buffer_t buffer;
2718                 const char *str;
2719                 char server[DNS_NAME_FORMATSIZE + 1];
2720                 char contact[DNS_NAME_FORMATSIZE + 1];
2721                 isc_boolean_t logit;
2722                 const char *empty_dbtype[4] =
2723                                     { "_builtin", "empty", NULL, NULL };
2724                 int empty_dbtypec = 4;
2725                 isc_boolean_t zonestats_on;
2726
2727                 dns_fixedname_init(&fixed);
2728                 name = dns_fixedname_name(&fixed);
2729
2730                 obj = NULL;
2731                 result = ns_config_get(maps, "empty-server", &obj);
2732                 if (result == ISC_R_SUCCESS) {
2733                         str = cfg_obj_asstring(obj);
2734                         isc_buffer_init(&buffer, str, strlen(str));
2735                         isc_buffer_add(&buffer, strlen(str));
2736                         CHECK(dns_name_fromtext(name, &buffer, dns_rootname, 0,
2737                                                 NULL));
2738                         isc_buffer_init(&buffer, server, sizeof(server) - 1);
2739                         CHECK(dns_name_totext(name, ISC_FALSE, &buffer));
2740                         server[isc_buffer_usedlength(&buffer)] = 0;
2741                         empty_dbtype[2] = server;
2742                 } else
2743                         empty_dbtype[2] = "@";
2744
2745                 obj = NULL;
2746                 result = ns_config_get(maps, "empty-contact", &obj);
2747                 if (result == ISC_R_SUCCESS) {
2748                         str = cfg_obj_asstring(obj);
2749                         isc_buffer_init(&buffer, str, strlen(str));
2750                         isc_buffer_add(&buffer, strlen(str));
2751                         CHECK(dns_name_fromtext(name, &buffer, dns_rootname, 0,
2752                                                 NULL));
2753                         isc_buffer_init(&buffer, contact, sizeof(contact) - 1);
2754                         CHECK(dns_name_totext(name, ISC_FALSE, &buffer));
2755                         contact[isc_buffer_usedlength(&buffer)] = 0;
2756                         empty_dbtype[3] = contact;
2757                 } else
2758                         empty_dbtype[3] = ".";
2759
2760                 obj = NULL;
2761                 result = ns_config_get(maps, "zone-statistics", &obj);
2762                 INSIST(result == ISC_R_SUCCESS);
2763                 zonestats_on = cfg_obj_asboolean(obj);
2764
2765                 logit = ISC_TRUE;
2766                 for (empty = empty_zones[empty_zone].zone;
2767                      empty != NULL;
2768                      empty = empty_zones[++empty_zone].zone)
2769                 {
2770                         dns_forwarders_t *forwarders = NULL;
2771                         dns_view_t *pview = NULL;
2772
2773                         isc_buffer_init(&buffer, empty, strlen(empty));
2774                         isc_buffer_add(&buffer, strlen(empty));
2775                         /*
2776                          * Look for zone on drop list.
2777                          */
2778                         CHECK(dns_name_fromtext(name, &buffer, dns_rootname, 0,
2779                                                 NULL));
2780                         if (disablelist != NULL &&
2781                             on_disable_list(disablelist, name))
2782                                 continue;
2783
2784                         /*
2785                          * This zone already exists.
2786                          */
2787                         (void)dns_view_findzone(view, name, &zone);
2788                         if (zone != NULL) {
2789                                 CHECK(setquerystats(zone, mctx, zonestats_on));
2790                                 dns_zone_detach(&zone);
2791                                 continue;
2792                         }
2793
2794                         /*
2795                          * If we would forward this name don't add a
2796                          * empty zone for it.
2797                          */
2798                         result = dns_fwdtable_find(view->fwdtable, name,
2799                                                    &forwarders);
2800                         if (result == ISC_R_SUCCESS &&
2801                             forwarders->fwdpolicy == dns_fwdpolicy_only)
2802                                 continue;
2803
2804                         if (!rfc1918 && empty_zones[empty_zone].rfc1918) {
2805                                 if (logit) {
2806                                         isc_log_write(ns_g_lctx,
2807                                                       NS_LOGCATEGORY_GENERAL,
2808                                                       NS_LOGMODULE_SERVER,
2809                                                       ISC_LOG_WARNING,
2810                                                       "Warning%s%s: "
2811                                                       "'empty-zones-enable/"
2812                                                       "disable-empty-zone' "
2813                                                       "not set: disabling "
2814                                                       "RFC 1918 empty zones",
2815                                                       sep, viewname);
2816                                         logit = ISC_FALSE;
2817                                 }
2818                                 continue;
2819                         }
2820
2821                         /*
2822                          * See if we can re-use a existing zone.
2823                          */
2824                         result = dns_viewlist_find(&ns_g_server->viewlist,
2825                                                    view->name, view->rdclass,
2826                                                    &pview);
2827                         if (result != ISC_R_NOTFOUND &&
2828                             result != ISC_R_SUCCESS)
2829                                 goto cleanup;
2830
2831                         if (pview != NULL) {
2832                                 (void)dns_view_findzone(pview, name, &zone);
2833                                 dns_view_detach(&pview);
2834                                 if (zone != NULL)
2835                                         check_dbtype(&zone, empty_dbtypec,
2836                                                      empty_dbtype, mctx);
2837                                 if (zone != NULL) {
2838                                         dns_zone_setview(zone, view);
2839                                         CHECK(dns_view_addzone(view, zone));
2840                                         CHECK(setquerystats(zone, mctx,
2841                                                             zonestats_on));
2842                                         dns_zone_detach(&zone);
2843                                         continue;
2844                                 }
2845                         }
2846
2847                         CHECK(dns_zone_create(&zone, mctx));
2848                         CHECK(dns_zone_setorigin(zone, name));
2849                         dns_zone_setview(zone, view);
2850                         CHECK(dns_zonemgr_managezone(ns_g_server->zonemgr,
2851                                                      zone));
2852                         dns_zone_setclass(zone, view->rdclass);
2853                         dns_zone_settype(zone, dns_zone_master);
2854                         dns_zone_setstats(zone, ns_g_server->zonestats);
2855                         CHECK(dns_zone_setdbtype(zone, empty_dbtypec,
2856                                                  empty_dbtype));
2857                         if (view->queryacl != NULL)
2858                                 dns_zone_setqueryacl(zone, view->queryacl);
2859                         if (view->queryonacl != NULL)
2860                                 dns_zone_setqueryonacl(zone, view->queryonacl);
2861                         dns_zone_setdialup(zone, dns_dialuptype_no);
2862                         dns_zone_setnotifytype(zone, dns_notifytype_no);
2863                         dns_zone_setoption(zone, DNS_ZONEOPT_NOCHECKNS,
2864                                            ISC_TRUE);
2865                         CHECK(setquerystats(zone, mctx, zonestats_on));
2866                         CHECK(dns_view_addzone(view, zone));
2867                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
2868                                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
2869                                       "automatic empty zone%s%s: %s",
2870                                       sep, viewname,  empty);
2871                         dns_zone_detach(&zone);
2872                 }
2873         }
2874
2875         /*
2876          * Make the list of response policy zone names for views that
2877          * are used for real lookups and so care about hints.
2878          */
2879         zonelist = NULL;
2880         if (view->rdclass == dns_rdataclass_in && need_hints) {
2881                 obj = NULL;
2882                 result = ns_config_get(maps, "response-policy", &obj);
2883                 if (result == ISC_R_SUCCESS)
2884                         cfg_map_get(obj, "zone", &zonelist);
2885         }
2886
2887         if (zonelist != NULL) {
2888                 for (element = cfg_list_first(zonelist);
2889                      element != NULL;
2890                      element = cfg_list_next(element)) {
2891                         result = configure_rpz(view, element);
2892                         if (result != ISC_R_SUCCESS)
2893                                 goto cleanup;
2894                         dns_rpz_set_need(ISC_TRUE);
2895                 }
2896         }
2897
2898         result = ISC_R_SUCCESS;
2899
2900  cleanup:
2901         if (clients != NULL)
2902                 dns_acl_detach(&clients);
2903         if (mapped != NULL)
2904                 dns_acl_detach(&mapped);
2905         if (excluded != NULL)
2906                 dns_acl_detach(&excluded);
2907         if (ring != NULL)
2908                 dns_tsigkeyring_detach(&ring);
2909         if (zone != NULL)
2910                 dns_zone_detach(&zone);
2911         if (dispatch4 != NULL)
2912                 dns_dispatch_detach(&dispatch4);
2913         if (dispatch6 != NULL)
2914                 dns_dispatch_detach(&dispatch6);
2915         if (resstats != NULL)
2916                 isc_stats_detach(&resstats);
2917         if (resquerystats != NULL)
2918                 dns_stats_detach(&resquerystats);
2919         if (order != NULL)
2920                 dns_order_detach(&order);
2921         if (cmctx != NULL)
2922                 isc_mem_detach(&cmctx);
2923         if (hmctx != NULL)
2924                 isc_mem_detach(&hmctx);
2925
2926         if (cache != NULL)
2927                 dns_cache_detach(&cache);
2928
2929         return (result);
2930 }
2931
2932 static isc_result_t
2933 configure_hints(dns_view_t *view, const char *filename) {
2934         isc_result_t result;
2935         dns_db_t *db;
2936
2937         db = NULL;
2938         result = dns_rootns_create(view->mctx, view->rdclass, filename, &db);
2939         if (result == ISC_R_SUCCESS) {
2940                 dns_view_sethints(view, db);
2941                 dns_db_detach(&db);
2942         }
2943
2944         return (result);
2945 }
2946
2947 static isc_result_t
2948 configure_alternates(const cfg_obj_t *config, dns_view_t *view,
2949                      const cfg_obj_t *alternates)
2950 {
2951         const cfg_obj_t *portobj;
2952         const cfg_obj_t *addresses;
2953         const cfg_listelt_t *element;
2954         isc_result_t result = ISC_R_SUCCESS;
2955         in_port_t port;
2956
2957         /*
2958          * Determine which port to send requests to.
2959          */
2960         if (ns_g_lwresdonly && ns_g_port != 0)
2961                 port = ns_g_port;
2962         else
2963                 CHECKM(ns_config_getport(config, &port), "port");
2964
2965         if (alternates != NULL) {
2966                 portobj = cfg_tuple_get(alternates, "port");
2967                 if (cfg_obj_isuint32(portobj)) {
2968                         isc_uint32_t val = cfg_obj_asuint32(portobj);
2969                         if (val > ISC_UINT16_MAX) {
2970                                 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
2971                                             "port '%u' out of range", val);
2972                                 return (ISC_R_RANGE);
2973                         }
2974                         port = (in_port_t) val;
2975                 }
2976         }
2977
2978         addresses = NULL;
2979         if (alternates != NULL)
2980                 addresses = cfg_tuple_get(alternates, "addresses");
2981
2982         for (element = cfg_list_first(addresses);
2983              element != NULL;
2984              element = cfg_list_next(element))
2985         {
2986                 const cfg_obj_t *alternate = cfg_listelt_value(element);
2987                 isc_sockaddr_t sa;
2988
2989                 if (!cfg_obj_issockaddr(alternate)) {
2990                         dns_fixedname_t fixed;
2991                         dns_name_t *name;
2992                         const char *str = cfg_obj_asstring(cfg_tuple_get(
2993                                                            alternate, "name"));
2994                         isc_buffer_t buffer;
2995                         in_port_t myport = port;
2996
2997                         isc_buffer_init(&buffer, str, strlen(str));
2998                         isc_buffer_add(&buffer, strlen(str));
2999                         dns_fixedname_init(&fixed);
3000                         name = dns_fixedname_name(&fixed);
3001                         CHECK(dns_name_fromtext(name, &buffer, dns_rootname, 0,
3002                                                 NULL));
3003
3004                         portobj = cfg_tuple_get(alternate, "port");
3005                         if (cfg_obj_isuint32(portobj)) {
3006                                 isc_uint32_t val = cfg_obj_asuint32(portobj);
3007                                 if (val > ISC_UINT16_MAX) {
3008                                         cfg_obj_log(portobj, ns_g_lctx,
3009                                                     ISC_LOG_ERROR,
3010                                                     "port '%u' out of range",
3011                                                      val);
3012                                         return (ISC_R_RANGE);
3013                                 }
3014                                 myport = (in_port_t) val;
3015                         }
3016                         CHECK(dns_resolver_addalternate(view->resolver, NULL,
3017                                                         name, myport));
3018                         continue;
3019                 }
3020
3021                 sa = *cfg_obj_assockaddr(alternate);
3022                 if (isc_sockaddr_getport(&sa) == 0)
3023                         isc_sockaddr_setport(&sa, port);
3024                 CHECK(dns_resolver_addalternate(view->resolver, &sa,
3025                                                 NULL, 0));
3026         }
3027
3028  cleanup:
3029         return (result);
3030 }
3031
3032 static isc_result_t
3033 configure_forward(const cfg_obj_t *config, dns_view_t *view, dns_name_t *origin,
3034                   const cfg_obj_t *forwarders, const cfg_obj_t *forwardtype)
3035 {
3036         const cfg_obj_t *portobj;
3037         const cfg_obj_t *faddresses;
3038         const cfg_listelt_t *element;
3039         dns_fwdpolicy_t fwdpolicy = dns_fwdpolicy_none;
3040         isc_sockaddrlist_t addresses;
3041         isc_sockaddr_t *sa;
3042         isc_result_t result;
3043         in_port_t port;
3044
3045         ISC_LIST_INIT(addresses);
3046
3047         /*
3048          * Determine which port to send forwarded requests to.
3049          */
3050         if (ns_g_lwresdonly && ns_g_port != 0)
3051                 port = ns_g_port;
3052         else
3053                 CHECKM(ns_config_getport(config, &port), "port");
3054
3055         if (forwarders != NULL) {
3056                 portobj = cfg_tuple_get(forwarders, "port");
3057                 if (cfg_obj_isuint32(portobj)) {
3058                         isc_uint32_t val = cfg_obj_asuint32(portobj);
3059                         if (val > ISC_UINT16_MAX) {
3060                                 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
3061                                             "port '%u' out of range", val);
3062                                 return (ISC_R_RANGE);
3063                         }
3064                         port = (in_port_t) val;
3065                 }
3066         }
3067
3068         faddresses = NULL;
3069         if (forwarders != NULL)
3070                 faddresses = cfg_tuple_get(forwarders, "addresses");
3071
3072         for (element = cfg_list_first(faddresses);
3073              element != NULL;
3074              element = cfg_list_next(element))
3075         {
3076                 const cfg_obj_t *forwarder = cfg_listelt_value(element);
3077                 sa = isc_mem_get(view->mctx, sizeof(isc_sockaddr_t));
3078                 if (sa == NULL) {
3079                         result = ISC_R_NOMEMORY;
3080                         goto cleanup;
3081                 }
3082                 *sa = *cfg_obj_assockaddr(forwarder);
3083                 if (isc_sockaddr_getport(sa) == 0)
3084                         isc_sockaddr_setport(sa, port);
3085                 ISC_LINK_INIT(sa, link);
3086                 ISC_LIST_APPEND(addresses, sa, link);
3087         }
3088
3089         if (ISC_LIST_EMPTY(addresses)) {
3090                 if (forwardtype != NULL)
3091                         cfg_obj_log(forwarders, ns_g_lctx, ISC_LOG_WARNING,
3092                                     "no forwarders seen; disabling "
3093                                     "forwarding");
3094                 fwdpolicy = dns_fwdpolicy_none;
3095         } else {
3096                 if (forwardtype == NULL)
3097                         fwdpolicy = dns_fwdpolicy_first;
3098                 else {
3099                         const char *forwardstr = cfg_obj_asstring(forwardtype);
3100                         if (strcasecmp(forwardstr, "first") == 0)
3101                                 fwdpolicy = dns_fwdpolicy_first;
3102                         else if (strcasecmp(forwardstr, "only") == 0)
3103                                 fwdpolicy = dns_fwdpolicy_only;
3104                         else
3105                                 INSIST(0);
3106                 }
3107         }
3108
3109         result = dns_fwdtable_add(view->fwdtable, origin, &addresses,
3110                                   fwdpolicy);
3111         if (result != ISC_R_SUCCESS) {
3112                 char namebuf[DNS_NAME_FORMATSIZE];
3113                 dns_name_format(origin, namebuf, sizeof(namebuf));
3114                 cfg_obj_log(forwarders, ns_g_lctx, ISC_LOG_WARNING,
3115                             "could not set up forwarding for domain '%s': %s",
3116                             namebuf, isc_result_totext(result));
3117                 goto cleanup;
3118         }
3119
3120         result = ISC_R_SUCCESS;
3121
3122  cleanup:
3123
3124         while (!ISC_LIST_EMPTY(addresses)) {
3125                 sa = ISC_LIST_HEAD(addresses);
3126                 ISC_LIST_UNLINK(addresses, sa, link);
3127                 isc_mem_put(view->mctx, sa, sizeof(isc_sockaddr_t));
3128         }
3129
3130         return (result);
3131 }
3132
3133 static isc_result_t
3134 get_viewinfo(const cfg_obj_t *vconfig, const char **namep,
3135              dns_rdataclass_t *classp)
3136 {
3137         isc_result_t result = ISC_R_SUCCESS;
3138         const char *viewname;
3139         dns_rdataclass_t viewclass;
3140
3141         REQUIRE(namep != NULL && *namep == NULL);
3142         REQUIRE(classp != NULL);
3143
3144         if (vconfig != NULL) {
3145                 const cfg_obj_t *classobj = NULL;
3146
3147                 viewname = cfg_obj_asstring(cfg_tuple_get(vconfig, "name"));
3148                 classobj = cfg_tuple_get(vconfig, "class");
3149                 result = ns_config_getclass(classobj, dns_rdataclass_in,
3150                                             &viewclass);
3151         } else {
3152                 viewname = "_default";
3153                 viewclass = dns_rdataclass_in;
3154         }
3155
3156         *namep = viewname;
3157         *classp = viewclass;
3158
3159         return (result);
3160 }
3161
3162 /*
3163  * Find a view based on its configuration info and attach to it.
3164  *
3165  * If 'vconfig' is NULL, attach to the default view.
3166  */
3167 static isc_result_t
3168 find_view(const cfg_obj_t *vconfig, dns_viewlist_t *viewlist,
3169           dns_view_t **viewp)
3170 {
3171         isc_result_t result;
3172         const char *viewname = NULL;
3173         dns_rdataclass_t viewclass;
3174         dns_view_t *view = NULL;
3175
3176         result = get_viewinfo(vconfig, &viewname, &viewclass);
3177         if (result != ISC_R_SUCCESS)
3178                 return (result);
3179
3180         result = dns_viewlist_find(viewlist, viewname, viewclass, &view);
3181         if (result != ISC_R_SUCCESS)
3182                 return (result);
3183
3184         *viewp = view;
3185         return (ISC_R_SUCCESS);
3186 }
3187
3188 /*
3189  * Create a new view and add it to the list.
3190  *
3191  * If 'vconfig' is NULL, create the default view.
3192  *
3193  * The view created is attached to '*viewp'.
3194  */
3195 static isc_result_t
3196 create_view(const cfg_obj_t *vconfig, dns_viewlist_t *viewlist,
3197             dns_view_t **viewp)
3198 {
3199         isc_result_t result;
3200         const char *viewname = NULL;
3201         dns_rdataclass_t viewclass;
3202         dns_view_t *view = NULL;
3203
3204         result = get_viewinfo(vconfig, &viewname, &viewclass);
3205         if (result != ISC_R_SUCCESS)
3206                 return (result);
3207
3208         result = dns_viewlist_find(viewlist, viewname, viewclass, &view);
3209         if (result == ISC_R_SUCCESS)
3210                 return (ISC_R_EXISTS);
3211         if (result != ISC_R_NOTFOUND)
3212                 return (result);
3213         INSIST(view == NULL);
3214
3215         result = dns_view_create(ns_g_mctx, viewclass, viewname, &view);
3216         if (result != ISC_R_SUCCESS)
3217                 return (result);
3218
3219         ISC_LIST_APPEND(*viewlist, view, link);
3220         dns_view_attach(view, viewp);
3221         return (ISC_R_SUCCESS);
3222 }
3223
3224 /*
3225  * Configure or reconfigure a zone.
3226  */
3227 static isc_result_t
3228 configure_zone(const cfg_obj_t *config, const cfg_obj_t *zconfig,
3229                const cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
3230                cfg_aclconfctx_t *aclconf, isc_boolean_t added)
3231 {
3232         dns_view_t *pview = NULL;       /* Production view */
3233         dns_zone_t *zone = NULL;        /* New or reused zone */
3234         dns_zone_t *dupzone = NULL;
3235         const cfg_obj_t *options = NULL;
3236         const cfg_obj_t *zoptions = NULL;
3237         const cfg_obj_t *typeobj = NULL;
3238         const cfg_obj_t *forwarders = NULL;
3239         const cfg_obj_t *forwardtype = NULL;
3240         const cfg_obj_t *only = NULL;
3241         isc_result_t result;
3242         isc_result_t tresult;
3243         isc_buffer_t buffer;
3244         dns_fixedname_t fixorigin;
3245         dns_name_t *origin;
3246         const char *zname;
3247         dns_rdataclass_t zclass;
3248         const char *ztypestr;
3249
3250         options = NULL;
3251         (void)cfg_map_get(config, "options", &options);
3252
3253         zoptions = cfg_tuple_get(zconfig, "options");
3254
3255         /*
3256          * Get the zone origin as a dns_name_t.
3257          */
3258         zname = cfg_obj_asstring(cfg_tuple_get(zconfig, "name"));
3259         isc_buffer_init(&buffer, zname, strlen(zname));
3260         isc_buffer_add(&buffer, strlen(zname));
3261         dns_fixedname_init(&fixorigin);
3262         CHECK(dns_name_fromtext(dns_fixedname_name(&fixorigin),
3263                                 &buffer, dns_rootname, 0, NULL));
3264         origin = dns_fixedname_name(&fixorigin);
3265
3266         CHECK(ns_config_getclass(cfg_tuple_get(zconfig, "class"),
3267                                  view->rdclass, &zclass));
3268         if (zclass != view->rdclass) {
3269                 const char *vname = NULL;
3270                 if (vconfig != NULL)
3271                         vname = cfg_obj_asstring(cfg_tuple_get(vconfig,
3272                                                                "name"));
3273                 else
3274                         vname = "<default view>";
3275
3276                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3277                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
3278                               "zone '%s': wrong class for view '%s'",
3279                               zname, vname);
3280                 result = ISC_R_FAILURE;
3281                 goto cleanup;
3282         }
3283
3284         (void)cfg_map_get(zoptions, "type", &typeobj);
3285         if (typeobj == NULL) {
3286                 cfg_obj_log(zconfig, ns_g_lctx, ISC_LOG_ERROR,
3287                             "zone '%s' 'type' not specified", zname);
3288                 return (ISC_R_FAILURE);
3289         }
3290         ztypestr = cfg_obj_asstring(typeobj);
3291
3292         /*
3293          * "hints zones" aren't zones.  If we've got one,
3294          * configure it and return.
3295          */
3296         if (strcasecmp(ztypestr, "hint") == 0) {
3297                 const cfg_obj_t *fileobj = NULL;
3298                 if (cfg_map_get(zoptions, "file", &fileobj) != ISC_R_SUCCESS) {
3299                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3300                                       NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
3301                                       "zone '%s': 'file' not specified",
3302                                       zname);
3303                         result = ISC_R_FAILURE;
3304                         goto cleanup;
3305                 }
3306                 if (dns_name_equal(origin, dns_rootname)) {
3307                         const char *hintsfile = cfg_obj_asstring(fileobj);
3308
3309                         result = configure_hints(view, hintsfile);
3310                         if (result != ISC_R_SUCCESS) {
3311                                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3312                                               NS_LOGMODULE_SERVER,
3313                                               ISC_LOG_ERROR,
3314                                               "could not configure root hints "
3315                                               "from '%s': %s", hintsfile,
3316                                               isc_result_totext(result));
3317                                 goto cleanup;
3318                         }
3319                         /*
3320                          * Hint zones may also refer to delegation only points.
3321                          */
3322                         only = NULL;
3323                         tresult = cfg_map_get(zoptions, "delegation-only",
3324                                               &only);
3325                         if (tresult == ISC_R_SUCCESS && cfg_obj_asboolean(only))
3326                                 CHECK(dns_view_adddelegationonly(view, origin));
3327                 } else {
3328                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3329                                       NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
3330                                       "ignoring non-root hint zone '%s'",
3331                                       zname);
3332                         result = ISC_R_SUCCESS;
3333                 }
3334                 /* Skip ordinary zone processing. */
3335                 goto cleanup;
3336         }
3337
3338         /*
3339          * "forward zones" aren't zones either.  Translate this syntax into
3340          * the appropriate selective forwarding configuration and return.
3341          */
3342         if (strcasecmp(ztypestr, "forward") == 0) {
3343                 forwardtype = NULL;
3344                 forwarders = NULL;
3345
3346                 (void)cfg_map_get(zoptions, "forward", &forwardtype);
3347                 (void)cfg_map_get(zoptions, "forwarders", &forwarders);
3348                 result = configure_forward(config, view, origin, forwarders,
3349                                            forwardtype);
3350                 goto cleanup;
3351         }
3352
3353         /*
3354          * "delegation-only zones" aren't zones either.
3355          */
3356         if (strcasecmp(ztypestr, "delegation-only") == 0) {
3357                 result = dns_view_adddelegationonly(view, origin);
3358                 goto cleanup;
3359         }
3360
3361         /*
3362          * Check for duplicates in the new zone table.
3363          */
3364         result = dns_view_findzone(view, origin, &dupzone);
3365         if (result == ISC_R_SUCCESS) {
3366                 /*
3367                  * We already have this zone!
3368                  */
3369                 cfg_obj_log(zconfig, ns_g_lctx, ISC_LOG_ERROR,
3370                             "zone '%s' already exists", zname);
3371                 dns_zone_detach(&dupzone);
3372                 result = ISC_R_EXISTS;
3373                 goto cleanup;
3374         }
3375         INSIST(dupzone == NULL);
3376
3377         /*
3378          * See if we can reuse an existing zone.  This is
3379          * only possible if all of these are true:
3380          *   - The zone's view exists
3381          *   - A zone with the right name exists in the view
3382          *   - The zone is compatible with the config
3383          *     options (e.g., an existing master zone cannot
3384          *     be reused if the options specify a slave zone)
3385          */
3386         result = dns_viewlist_find(&ns_g_server->viewlist,
3387                                    view->name, view->rdclass,
3388                                    &pview);
3389         if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
3390                 goto cleanup;
3391         if (pview != NULL)
3392                 result = dns_view_findzone(pview, origin, &zone);
3393         if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
3394                 goto cleanup;
3395         if (zone != NULL && !ns_zone_reusable(zone, zconfig))
3396                 dns_zone_detach(&zone);
3397
3398         if (zone != NULL) {
3399                 /*
3400                  * We found a reusable zone.  Make it use the
3401                  * new view.
3402                  */
3403                 dns_zone_setview(zone, view);
3404                 if (view->acache != NULL)
3405                         dns_zone_setacache(zone, view->acache);
3406         } else {
3407                 /*
3408                  * We cannot reuse an existing zone, we have
3409                  * to create a new one.
3410                  */
3411                 CHECK(dns_zone_create(&zone, mctx));
3412                 CHECK(dns_zone_setorigin(zone, origin));
3413                 dns_zone_setview(zone, view);
3414                 if (view->acache != NULL)
3415                         dns_zone_setacache(zone, view->acache);
3416                 CHECK(dns_zonemgr_managezone(ns_g_server->zonemgr, zone));
3417                 dns_zone_setstats(zone, ns_g_server->zonestats);
3418         }
3419
3420         /*
3421          * If the zone contains a 'forwarders' statement, configure
3422          * selective forwarding.
3423          */
3424         forwarders = NULL;
3425         if (cfg_map_get(zoptions, "forwarders", &forwarders) == ISC_R_SUCCESS)
3426         {
3427                 forwardtype = NULL;
3428                 (void)cfg_map_get(zoptions, "forward", &forwardtype);
3429                 CHECK(configure_forward(config, view, origin, forwarders,
3430                                         forwardtype));
3431         }
3432
3433         /*
3434          * Stub and forward zones may also refer to delegation only points.
3435          */
3436         only = NULL;
3437         if (cfg_map_get(zoptions, "delegation-only", &only) == ISC_R_SUCCESS)
3438         {
3439                 if (cfg_obj_asboolean(only))
3440                         CHECK(dns_view_adddelegationonly(view, origin));
3441         }
3442
3443         /*
3444          * Mark whether the zone was originally added at runtime or not
3445          */
3446         dns_zone_setadded(zone, added);
3447
3448         /*
3449          * Configure the zone.
3450          */
3451         CHECK(ns_zone_configure(config, vconfig, zconfig, aclconf, zone));
3452
3453         /*
3454          * Add the zone to its view in the new view list.
3455          */
3456         CHECK(dns_view_addzone(view, zone));
3457
3458         /*
3459          * Ensure that zone keys are reloaded on reconfig
3460          */
3461         if ((dns_zone_getkeyopts(zone) & DNS_ZONEKEY_MAINTAIN) != 0)
3462                 dns_zone_rekey(zone, ISC_FALSE);
3463
3464  cleanup:
3465         if (zone != NULL)
3466                 dns_zone_detach(&zone);
3467         if (pview != NULL)
3468                 dns_view_detach(&pview);
3469
3470         return (result);
3471 }
3472
3473 /*
3474  * Configure built-in zone for storing managed-key data.
3475  */
3476
3477 #define KEYZONE "managed-keys.bind"
3478 #define MKEYS ".mkeys"
3479
3480 static isc_result_t
3481 add_keydata_zone(dns_view_t *view, const char *directory, isc_mem_t *mctx) {
3482         isc_result_t result;
3483         dns_view_t *pview = NULL;
3484         dns_zone_t *zone = NULL;
3485         dns_acl_t *none = NULL;
3486         char filename[PATH_MAX];
3487         char buffer[ISC_SHA256_DIGESTSTRINGLENGTH + sizeof(MKEYS)];
3488         int n;
3489
3490         REQUIRE(view != NULL);
3491
3492         /* See if we can re-use an existing keydata zone. */
3493         result = dns_viewlist_find(&ns_g_server->viewlist,
3494                                    view->name, view->rdclass,
3495                                    &pview);
3496         if (result != ISC_R_NOTFOUND &&
3497             result != ISC_R_SUCCESS)
3498                 return (result);
3499
3500         if (pview != NULL && pview->managed_keys != NULL) {
3501                 dns_zone_attach(pview->managed_keys, &view->managed_keys);
3502                 dns_zone_setview(pview->managed_keys, view);
3503                 dns_view_detach(&pview);
3504                 dns_zone_synckeyzone(view->managed_keys);
3505                 return (ISC_R_SUCCESS);
3506         }
3507
3508         /* No existing keydata zone was found; create one */
3509         CHECK(dns_zone_create(&zone, mctx));
3510         CHECK(dns_zone_setorigin(zone, dns_rootname));
3511
3512         isc_sha256_data((void *)view->name, strlen(view->name), buffer);
3513         strcat(buffer, MKEYS);
3514         n = snprintf(filename, sizeof(filename), "%s%s%s",
3515                      directory ? directory : "", directory ? "/" : "",
3516                      strcmp(view->name, "_default") == 0 ? KEYZONE : buffer);
3517         if (n < 0 || (size_t)n >= sizeof(filename)) {
3518                 result = (n < 0) ? ISC_R_FAILURE : ISC_R_NOSPACE;
3519                 goto cleanup;
3520         }
3521         CHECK(dns_zone_setfile(zone, filename));
3522
3523         dns_zone_setview(zone, view);
3524         dns_zone_settype(zone, dns_zone_key);
3525         dns_zone_setclass(zone, view->rdclass);
3526
3527         CHECK(dns_zonemgr_managezone(ns_g_server->zonemgr, zone));
3528
3529         if (view->acache != NULL)
3530                 dns_zone_setacache(zone, view->acache);
3531
3532         CHECK(dns_acl_none(mctx, &none));
3533         dns_zone_setqueryacl(zone, none);
3534         dns_zone_setqueryonacl(zone, none);
3535         dns_acl_detach(&none);
3536
3537         dns_zone_setdialup(zone, dns_dialuptype_no);
3538         dns_zone_setnotifytype(zone, dns_notifytype_no);
3539         dns_zone_setoption(zone, DNS_ZONEOPT_NOCHECKNS, ISC_TRUE);
3540         dns_zone_setjournalsize(zone, 0);
3541
3542         dns_zone_setstats(zone, ns_g_server->zonestats);
3543         CHECK(setquerystats(zone, mctx, ISC_FALSE));
3544
3545         if (view->managed_keys != NULL)
3546                 dns_zone_detach(&view->managed_keys);
3547         dns_zone_attach(zone, &view->managed_keys);
3548
3549         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3550                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
3551                       "set up managed keys zone for view %s, file '%s'",
3552                       view->name, filename);
3553
3554 cleanup:
3555         if (zone != NULL)
3556                 dns_zone_detach(&zone);
3557         if (none != NULL)
3558                 dns_acl_detach(&none);
3559
3560         return (result);
3561 }
3562
3563 /*
3564  * Configure a single server quota.
3565  */
3566 static void
3567 configure_server_quota(const cfg_obj_t **maps, const char *name,
3568                        isc_quota_t *quota)
3569 {
3570         const cfg_obj_t *obj = NULL;
3571         isc_result_t result;
3572
3573         result = ns_config_get(maps, name, &obj);
3574         INSIST(result == ISC_R_SUCCESS);
3575         isc_quota_max(quota, cfg_obj_asuint32(obj));
3576 }
3577
3578 /*
3579  * This function is called as soon as the 'directory' statement has been
3580  * parsed.  This can be extended to support other options if necessary.
3581  */
3582 static isc_result_t
3583 directory_callback(const char *clausename, const cfg_obj_t *obj, void *arg) {
3584         isc_result_t result;
3585         const char *directory;
3586
3587         REQUIRE(strcasecmp("directory", clausename) == 0);
3588
3589         UNUSED(arg);
3590         UNUSED(clausename);
3591
3592         /*
3593          * Change directory.
3594          */
3595         directory = cfg_obj_asstring(obj);
3596
3597         if (! isc_file_ischdiridempotent(directory))
3598                 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_WARNING,
3599                             "option 'directory' contains relative path '%s'",
3600                             directory);
3601
3602         result = isc_dir_chdir(directory);
3603         if (result != ISC_R_SUCCESS) {
3604                 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR,
3605                             "change directory to '%s' failed: %s",
3606                             directory, isc_result_totext(result));
3607                 return (result);
3608         }
3609
3610         return (ISC_R_SUCCESS);
3611 }
3612
3613 static void
3614 scan_interfaces(ns_server_t *server, isc_boolean_t verbose) {
3615         isc_boolean_t match_mapped = server->aclenv.match_mapped;
3616
3617         ns_interfacemgr_scan(server->interfacemgr, verbose);
3618         /*
3619          * Update the "localhost" and "localnets" ACLs to match the
3620          * current set of network interfaces.
3621          */
3622         dns_aclenv_copy(&server->aclenv,
3623                         ns_interfacemgr_getaclenv(server->interfacemgr));
3624
3625         server->aclenv.match_mapped = match_mapped;
3626 }
3627
3628 static isc_result_t
3629 add_listenelt(isc_mem_t *mctx, ns_listenlist_t *list, isc_sockaddr_t *addr,
3630               isc_boolean_t wcardport_ok)
3631 {
3632         ns_listenelt_t *lelt = NULL;
3633         dns_acl_t *src_acl = NULL;
3634         isc_result_t result;
3635         isc_sockaddr_t any_sa6;
3636         isc_netaddr_t netaddr;
3637
3638         REQUIRE(isc_sockaddr_pf(addr) == AF_INET6);
3639
3640         isc_sockaddr_any6(&any_sa6);
3641         if (!isc_sockaddr_equal(&any_sa6, addr) &&
3642             (wcardport_ok || isc_sockaddr_getport(addr) != 0)) {
3643                 isc_netaddr_fromin6(&netaddr, &addr->type.sin6.sin6_addr);
3644
3645                 result = dns_acl_create(mctx, 0, &src_acl);
3646                 if (result != ISC_R_SUCCESS)
3647                         return (result);
3648
3649                 result = dns_iptable_addprefix(src_acl->iptable,
3650                                                &netaddr, 128, ISC_TRUE);
3651                 if (result != ISC_R_SUCCESS)
3652                         goto clean;
3653
3654                 result = ns_listenelt_create(mctx, isc_sockaddr_getport(addr),
3655                                              src_acl, &lelt);
3656                 if (result != ISC_R_SUCCESS)
3657                         goto clean;
3658                 ISC_LIST_APPEND(list->elts, lelt, link);
3659         }
3660
3661         return (ISC_R_SUCCESS);
3662
3663  clean:
3664         INSIST(lelt == NULL);
3665         dns_acl_detach(&src_acl);
3666
3667         return (result);
3668 }
3669
3670 /*
3671  * Make a list of xxx-source addresses and call ns_interfacemgr_adjust()
3672  * to update the listening interfaces accordingly.
3673  * We currently only consider IPv6, because this only affects IPv6 wildcard
3674  * sockets.
3675  */
3676 static void
3677 adjust_interfaces(ns_server_t *server, isc_mem_t *mctx) {
3678         isc_result_t result;
3679         ns_listenlist_t *list = NULL;
3680         dns_view_t *view;
3681         dns_zone_t *zone, *next;
3682         isc_sockaddr_t addr, *addrp;
3683
3684         result = ns_listenlist_create(mctx, &list);
3685         if (result != ISC_R_SUCCESS)
3686                 return;
3687
3688         for (view = ISC_LIST_HEAD(server->viewlist);
3689              view != NULL;
3690              view = ISC_LIST_NEXT(view, link)) {
3691                 dns_dispatch_t *dispatch6;
3692
3693                 dispatch6 = dns_resolver_dispatchv6(view->resolver);
3694                 if (dispatch6 == NULL)
3695                         continue;
3696                 result = dns_dispatch_getlocaladdress(dispatch6, &addr);
3697                 if (result != ISC_R_SUCCESS)
3698                         goto fail;
3699
3700                 /*
3701                  * We always add non-wildcard address regardless of whether
3702                  * the port is 'any' (the fourth arg is TRUE): if the port is
3703                  * specific, we need to add it since it may conflict with a
3704                  * listening interface; if it's zero, we'll dynamically open
3705                  * query ports, and some of them may override an existing
3706                  * wildcard IPv6 port.
3707                  */
3708                 result = add_listenelt(mctx, list, &addr, ISC_TRUE);
3709                 if (result != ISC_R_SUCCESS)
3710                         goto fail;
3711         }
3712
3713         zone = NULL;
3714         for (result = dns_zone_first(server->zonemgr, &zone);
3715              result == ISC_R_SUCCESS;
3716              next = NULL, result = dns_zone_next(zone, &next), zone = next) {
3717                 dns_view_t *zoneview;
3718
3719                 /*
3720                  * At this point the zone list may contain a stale zone
3721                  * just removed from the configuration.  To see the validity,
3722                  * check if the corresponding view is in our current view list.
3723                  * There may also be old zones that are still in the process
3724                  * of shutting down and have detached from their old view
3725                  * (zoneview == NULL).
3726                  */
3727                 zoneview = dns_zone_getview(zone);
3728                 if (zoneview == NULL)
3729                         continue;
3730                 for (view = ISC_LIST_HEAD(server->viewlist);
3731                      view != NULL && view != zoneview;
3732                      view = ISC_LIST_NEXT(view, link))
3733                         ;
3734                 if (view == NULL)
3735                         continue;
3736
3737                 addrp = dns_zone_getnotifysrc6(zone);
3738                 result = add_listenelt(mctx, list, addrp, ISC_FALSE);
3739                 if (result != ISC_R_SUCCESS)
3740                         goto fail;
3741
3742                 addrp = dns_zone_getxfrsource6(zone);
3743                 result = add_listenelt(mctx, list, addrp, ISC_FALSE);
3744                 if (result != ISC_R_SUCCESS)
3745                         goto fail;
3746         }
3747
3748         ns_interfacemgr_adjust(server->interfacemgr, list, ISC_TRUE);
3749
3750  clean:
3751         ns_listenlist_detach(&list);
3752         return;
3753
3754  fail:
3755         /*
3756          * Even when we failed the procedure, most of other interfaces
3757          * should work correctly.  We therefore just warn it.
3758          */
3759         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3760                       NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
3761                       "could not adjust the listen-on list; "
3762                       "some interfaces may not work");
3763         goto clean;
3764 }
3765
3766 /*
3767  * This event callback is invoked to do periodic network
3768  * interface scanning.
3769  */
3770 static void
3771 interface_timer_tick(isc_task_t *task, isc_event_t *event) {
3772         isc_result_t result;
3773         ns_server_t *server = (ns_server_t *) event->ev_arg;
3774         INSIST(task == server->task);
3775         UNUSED(task);
3776         isc_event_free(&event);
3777         /*
3778          * XXX should scan interfaces unlocked and get exclusive access
3779          * only to replace ACLs.
3780          */
3781         result = isc_task_beginexclusive(server->task);
3782         RUNTIME_CHECK(result == ISC_R_SUCCESS);
3783         scan_interfaces(server, ISC_FALSE);
3784         isc_task_endexclusive(server->task);
3785 }
3786
3787 static void
3788 heartbeat_timer_tick(isc_task_t *task, isc_event_t *event) {
3789         ns_server_t *server = (ns_server_t *) event->ev_arg;
3790         dns_view_t *view;
3791
3792         UNUSED(task);
3793         isc_event_free(&event);
3794         view = ISC_LIST_HEAD(server->viewlist);
3795         while (view != NULL) {
3796                 dns_view_dialup(view);
3797                 view = ISC_LIST_NEXT(view, link);
3798         }
3799 }
3800
3801 static void
3802 pps_timer_tick(isc_task_t *task, isc_event_t *event) {
3803         static unsigned int oldrequests = 0;
3804         unsigned int requests = ns_client_requests;
3805
3806         UNUSED(task);
3807         isc_event_free(&event);
3808
3809         /*
3810          * Don't worry about wrapping as the overflow result will be right.
3811          */
3812         dns_pps = (requests - oldrequests) / 1200;
3813         oldrequests = requests;
3814 }
3815
3816 /*
3817  * Replace the current value of '*field', a dynamically allocated
3818  * string or NULL, with a dynamically allocated copy of the
3819  * null-terminated string pointed to by 'value', or NULL.
3820  */
3821 static isc_result_t
3822 setstring(ns_server_t *server, char **field, const char *value) {
3823         char *copy;
3824
3825         if (value != NULL) {
3826                 copy = isc_mem_strdup(server->mctx, value);
3827                 if (copy == NULL)
3828                         return (ISC_R_NOMEMORY);
3829         } else {
3830                 copy = NULL;
3831         }
3832
3833         if (*field != NULL)
3834                 isc_mem_free(server->mctx, *field);
3835
3836         *field = copy;
3837         return (ISC_R_SUCCESS);
3838 }
3839
3840 /*
3841  * Replace the current value of '*field', a dynamically allocated
3842  * string or NULL, with another dynamically allocated string
3843  * or NULL if whether 'obj' is a string or void value, respectively.
3844  */
3845 static isc_result_t
3846 setoptstring(ns_server_t *server, char **field, const cfg_obj_t *obj) {
3847         if (cfg_obj_isvoid(obj))
3848                 return (setstring(server, field, NULL));
3849         else
3850                 return (setstring(server, field, cfg_obj_asstring(obj)));
3851 }
3852
3853 static void
3854 set_limit(const cfg_obj_t **maps, const char *configname,
3855           const char *description, isc_resource_t resourceid,
3856           isc_resourcevalue_t defaultvalue)
3857 {
3858         const cfg_obj_t *obj = NULL;
3859         const char *resource;
3860         isc_resourcevalue_t value;
3861         isc_result_t result;
3862
3863         if (ns_config_get(maps, configname, &obj) != ISC_R_SUCCESS)
3864                 return;
3865
3866         if (cfg_obj_isstring(obj)) {
3867                 resource = cfg_obj_asstring(obj);
3868                 if (strcasecmp(resource, "unlimited") == 0)
3869                         value = ISC_RESOURCE_UNLIMITED;
3870                 else {
3871                         INSIST(strcasecmp(resource, "default") == 0);
3872                         value = defaultvalue;
3873                 }
3874         } else
3875                 value = cfg_obj_asuint64(obj);
3876
3877         result = isc_resource_setlimit(resourceid, value);
3878         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
3879                       result == ISC_R_SUCCESS ?
3880                         ISC_LOG_DEBUG(3) : ISC_LOG_WARNING,
3881                       "set maximum %s to %" ISC_PRINT_QUADFORMAT "u: %s",
3882                       description, value, isc_result_totext(result));
3883 }
3884
3885 #define SETLIMIT(cfgvar, resource, description) \
3886         set_limit(maps, cfgvar, description, isc_resource_ ## resource, \
3887                   ns_g_init ## resource)
3888
3889 static void
3890 set_limits(const cfg_obj_t **maps) {
3891         SETLIMIT("stacksize", stacksize, "stack size");
3892         SETLIMIT("datasize", datasize, "data size");
3893         SETLIMIT("coresize", coresize, "core size");
3894         SETLIMIT("files", openfiles, "open files");
3895 }
3896
3897 static void
3898 portset_fromconf(isc_portset_t *portset, const cfg_obj_t *ports,
3899                  isc_boolean_t positive)
3900 {
3901         const cfg_listelt_t *element;
3902
3903         for (element = cfg_list_first(ports);
3904              element != NULL;
3905              element = cfg_list_next(element)) {
3906                 const cfg_obj_t *obj = cfg_listelt_value(element);
3907
3908                 if (cfg_obj_isuint32(obj)) {
3909                         in_port_t port = (in_port_t)cfg_obj_asuint32(obj);
3910
3911                         if (positive)
3912                                 isc_portset_add(portset, port);
3913                         else
3914                                 isc_portset_remove(portset, port);
3915                 } else {
3916                         const cfg_obj_t *obj_loport, *obj_hiport;
3917                         in_port_t loport, hiport;
3918
3919                         obj_loport = cfg_tuple_get(obj, "loport");
3920                         loport = (in_port_t)cfg_obj_asuint32(obj_loport);
3921                         obj_hiport = cfg_tuple_get(obj, "hiport");
3922                         hiport = (in_port_t)cfg_obj_asuint32(obj_hiport);
3923
3924                         if (positive)
3925                                 isc_portset_addrange(portset, loport, hiport);
3926                         else {
3927                                 isc_portset_removerange(portset, loport,
3928                                                         hiport);
3929                         }
3930                 }
3931         }
3932 }
3933
3934 static isc_result_t
3935 removed(dns_zone_t *zone, void *uap) {
3936         const char *type;
3937
3938         if (dns_zone_getview(zone) != uap)
3939                 return (ISC_R_SUCCESS);
3940
3941         switch (dns_zone_gettype(zone)) {
3942         case dns_zone_master:
3943                 type = "master";
3944                 break;
3945         case dns_zone_slave:
3946                 type = "slave";
3947                 break;
3948         case dns_zone_stub:
3949                 type = "stub";
3950                 break;
3951         default:
3952                 type = "other";
3953                 break;
3954         }
3955         dns_zone_log(zone, ISC_LOG_INFO, "(%s) removed", type);
3956         return (ISC_R_SUCCESS);
3957 }
3958
3959 static void
3960 cleanup_session_key(ns_server_t *server, isc_mem_t *mctx) {
3961         if (server->session_keyfile != NULL) {
3962                 isc_file_remove(server->session_keyfile);
3963                 isc_mem_free(mctx, server->session_keyfile);
3964                 server->session_keyfile = NULL;
3965         }
3966
3967         if (server->session_keyname != NULL) {
3968                 if (dns_name_dynamic(server->session_keyname))
3969                         dns_name_free(server->session_keyname, mctx);
3970                 isc_mem_put(mctx, server->session_keyname, sizeof(dns_name_t));
3971                 server->session_keyname = NULL;
3972         }
3973
3974         if (server->sessionkey != NULL)
3975                 dns_tsigkey_detach(&server->sessionkey);
3976
3977         server->session_keyalg = DST_ALG_UNKNOWN;
3978         server->session_keybits = 0;
3979 }
3980
3981 static isc_result_t
3982 generate_session_key(const char *filename, const char *keynamestr,
3983                      dns_name_t *keyname, const char *algstr,
3984                      dns_name_t *algname, unsigned int algtype,
3985                      isc_uint16_t bits, isc_mem_t *mctx,
3986                      dns_tsigkey_t **tsigkeyp)
3987 {
3988         isc_result_t result = ISC_R_SUCCESS;
3989         dst_key_t *key = NULL;
3990         isc_buffer_t key_txtbuffer;
3991         isc_buffer_t key_rawbuffer;
3992         char key_txtsecret[256];
3993         char key_rawsecret[64];
3994         isc_region_t key_rawregion;
3995         isc_stdtime_t now;
3996         dns_tsigkey_t *tsigkey = NULL;
3997         FILE *fp = NULL;
3998
3999         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4000                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4001                       "generating session key for dynamic DNS");
4002
4003         /* generate key */
4004         result = dst_key_generate(keyname, algtype, bits, 1, 0,
4005                                   DNS_KEYPROTO_ANY, dns_rdataclass_in,
4006                                   mctx, &key);
4007         if (result != ISC_R_SUCCESS)
4008                 return (result);
4009
4010         /*
4011          * Dump the key to the buffer for later use.  Should be done before
4012          * we transfer the ownership of key to tsigkey.
4013          */
4014         isc_buffer_init(&key_rawbuffer, &key_rawsecret, sizeof(key_rawsecret));
4015         CHECK(dst_key_tobuffer(key, &key_rawbuffer));
4016
4017         isc_buffer_usedregion(&key_rawbuffer, &key_rawregion);
4018         isc_buffer_init(&key_txtbuffer, &key_txtsecret, sizeof(key_txtsecret));
4019         CHECK(isc_base64_totext(&key_rawregion, -1, "", &key_txtbuffer));
4020
4021         /* Store the key in tsigkey. */
4022         isc_stdtime_get(&now);
4023         CHECK(dns_tsigkey_createfromkey(dst_key_name(key), algname, key,
4024                                         ISC_FALSE, NULL, now, now, mctx, NULL,
4025                                         &tsigkey));
4026
4027         /* Dump the key to the key file. */
4028         fp = ns_os_openfile(filename, S_IRUSR|S_IWUSR, ISC_TRUE);
4029         if (fp == NULL) {
4030                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4031                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
4032                               "could not create %s", filename);
4033                 result = ISC_R_NOPERM;
4034                 goto cleanup;
4035         }
4036
4037         fprintf(fp, "key \"%s\" {\n"
4038                 "\talgorithm %s;\n"
4039                 "\tsecret \"%.*s\";\n};\n", keynamestr, algstr,
4040                 (int) isc_buffer_usedlength(&key_txtbuffer),
4041                 (char*) isc_buffer_base(&key_txtbuffer));
4042
4043         RUNTIME_CHECK(isc_stdio_flush(fp) == ISC_R_SUCCESS);
4044         RUNTIME_CHECK(isc_stdio_close(fp) == ISC_R_SUCCESS);
4045
4046         dst_key_free(&key);
4047
4048         *tsigkeyp = tsigkey;
4049
4050         return (ISC_R_SUCCESS);
4051
4052   cleanup:
4053         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4054                       NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
4055                       "failed to generate session key "
4056                       "for dynamic DNS: %s", isc_result_totext(result));
4057         if (tsigkey != NULL)
4058                 dns_tsigkey_detach(&tsigkey);
4059         if (key != NULL)
4060                 dst_key_free(&key);
4061
4062         return (result);
4063 }
4064
4065 static isc_result_t
4066 configure_session_key(const cfg_obj_t **maps, ns_server_t *server,
4067                       isc_mem_t *mctx)
4068 {
4069         const char *keyfile, *keynamestr, *algstr;
4070         unsigned int algtype;
4071         dns_fixedname_t fname;
4072         dns_name_t *keyname, *algname;
4073         isc_buffer_t buffer;
4074         isc_uint16_t bits;
4075         const cfg_obj_t *obj;
4076         isc_boolean_t need_deleteold = ISC_FALSE;
4077         isc_boolean_t need_createnew = ISC_FALSE;
4078         isc_result_t result;
4079
4080         obj = NULL;
4081         result = ns_config_get(maps, "session-keyfile", &obj);
4082         if (result == ISC_R_SUCCESS) {
4083                 if (cfg_obj_isvoid(obj))
4084                         keyfile = NULL; /* disable it */
4085                 else
4086                         keyfile = cfg_obj_asstring(obj);
4087         } else
4088                 keyfile = ns_g_defaultsessionkeyfile;
4089
4090         obj = NULL;
4091         result = ns_config_get(maps, "session-keyname", &obj);
4092         INSIST(result == ISC_R_SUCCESS);
4093         keynamestr = cfg_obj_asstring(obj);
4094         dns_fixedname_init(&fname);
4095         isc_buffer_init(&buffer, keynamestr, strlen(keynamestr));
4096         isc_buffer_add(&buffer, strlen(keynamestr));
4097         keyname = dns_fixedname_name(&fname);
4098         result = dns_name_fromtext(keyname, &buffer, dns_rootname, 0, NULL);
4099         if (result != ISC_R_SUCCESS)
4100                 return (result);
4101
4102         obj = NULL;
4103         result = ns_config_get(maps, "session-keyalg", &obj);
4104         INSIST(result == ISC_R_SUCCESS);
4105         algstr = cfg_obj_asstring(obj);
4106         algname = NULL;
4107         result = ns_config_getkeyalgorithm2(algstr, &algname, &algtype, &bits);
4108         if (result != ISC_R_SUCCESS) {
4109                 const char *s = " (keeping current key)";
4110
4111                 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR, "session-keyalg: "
4112                             "unsupported or unknown algorithm '%s'%s",
4113                             algstr,
4114                             server->session_keyfile != NULL ? s : "");
4115                 return (result);
4116         }
4117
4118         /* See if we need to (re)generate a new key. */
4119         if (keyfile == NULL) {
4120                 if (server->session_keyfile != NULL)
4121                         need_deleteold = ISC_TRUE;
4122         } else if (server->session_keyfile == NULL)
4123                 need_createnew = ISC_TRUE;
4124         else if (strcmp(keyfile, server->session_keyfile) != 0 ||
4125                  !dns_name_equal(server->session_keyname, keyname) ||
4126                  server->session_keyalg != algtype ||
4127                  server->session_keybits != bits) {
4128                 need_deleteold = ISC_TRUE;
4129                 need_createnew = ISC_TRUE;
4130         }
4131
4132         if (need_deleteold) {
4133                 INSIST(server->session_keyfile != NULL);
4134                 INSIST(server->session_keyname != NULL);
4135                 INSIST(server->sessionkey != NULL);
4136
4137                 cleanup_session_key(server, mctx);
4138         }
4139
4140         if (need_createnew) {
4141                 INSIST(server->sessionkey == NULL);
4142                 INSIST(server->session_keyfile == NULL);
4143                 INSIST(server->session_keyname == NULL);
4144                 INSIST(server->session_keyalg == DST_ALG_UNKNOWN);
4145                 INSIST(server->session_keybits == 0);
4146
4147                 server->session_keyname = isc_mem_get(mctx, sizeof(dns_name_t));
4148                 if (server->session_keyname == NULL)
4149                         goto cleanup;
4150                 dns_name_init(server->session_keyname, NULL);
4151                 CHECK(dns_name_dup(keyname, mctx, server->session_keyname));
4152
4153                 server->session_keyfile = isc_mem_strdup(mctx, keyfile);
4154                 if (server->session_keyfile == NULL)
4155                         goto cleanup;
4156
4157                 server->session_keyalg = algtype;
4158                 server->session_keybits = bits;
4159
4160                 CHECK(generate_session_key(keyfile, keynamestr, keyname, algstr,
4161                                            algname, algtype, bits, mctx,
4162                                            &server->sessionkey));
4163         }
4164
4165         return (result);
4166
4167   cleanup:
4168         cleanup_session_key(server, mctx);
4169         return (result);
4170 }
4171
4172 static isc_result_t
4173 setup_newzones(dns_view_t *view, cfg_obj_t *config, cfg_obj_t *vconfig,
4174                cfg_parser_t *parser, cfg_aclconfctx_t *actx)
4175 {
4176         isc_result_t result = ISC_R_SUCCESS;
4177         isc_boolean_t allow = ISC_FALSE;
4178         struct cfg_context *nzcfg = NULL;
4179         cfg_parser_t *nzparser = NULL;
4180         cfg_obj_t *nzconfig = NULL;
4181         const cfg_obj_t *maps[4];
4182         const cfg_obj_t *options = NULL, *voptions = NULL;
4183         const cfg_obj_t *nz = NULL;
4184         int i = 0;
4185
4186         REQUIRE (config != NULL);
4187
4188         if (vconfig != NULL)
4189                 voptions = cfg_tuple_get(vconfig, "options");
4190         if (voptions != NULL)
4191                 maps[i++] = voptions;
4192         result = cfg_map_get(config, "options", &options);
4193         if (result == ISC_R_SUCCESS)
4194                 maps[i++] = options;
4195         maps[i++] = ns_g_defaults;
4196         maps[i] = NULL;
4197
4198         result = ns_config_get(maps, "allow-new-zones", &nz);
4199         if (result == ISC_R_SUCCESS)
4200                 allow = cfg_obj_asboolean(nz);
4201
4202         if (!allow) {
4203                 dns_view_setnewzones(view, ISC_FALSE, NULL, NULL);
4204                 return (ISC_R_SUCCESS);
4205         }
4206
4207         nzcfg = isc_mem_get(view->mctx, sizeof(*nzcfg));
4208         if (nzcfg == NULL) {
4209                 dns_view_setnewzones(view, ISC_FALSE, NULL, NULL);
4210                 return (ISC_R_NOMEMORY);
4211         }
4212
4213         dns_view_setnewzones(view, allow, nzcfg, newzone_cfgctx_destroy);
4214
4215         memset(nzcfg, 0, sizeof(*nzcfg));
4216         isc_mem_attach(view->mctx, &nzcfg->mctx);
4217         cfg_obj_attach(config, &nzcfg->config);
4218         cfg_parser_attach(parser, &nzcfg->parser);
4219         cfg_aclconfctx_attach(actx, &nzcfg->actx);
4220
4221         /*
4222          * Attempt to create a parser and parse the newzones
4223          * file.  If successful, preserve both; otherwise leave
4224          * them NULL.
4225          */
4226         result = cfg_parser_create(view->mctx, ns_g_lctx, &nzparser);
4227         if (result == ISC_R_SUCCESS)
4228                 result = cfg_parse_file(nzparser, view->new_zone_file,
4229                                         &cfg_type_newzones, &nzconfig);
4230         if (result == ISC_R_SUCCESS) {
4231                 cfg_parser_attach(nzparser, &nzcfg->nzparser);
4232                 cfg_obj_attach(nzconfig, &nzcfg->nzconfig);
4233         }
4234
4235         if (nzparser != NULL) {
4236                 if (nzconfig != NULL)
4237                         cfg_obj_destroy(nzparser, &nzconfig);
4238                 cfg_parser_destroy(&nzparser);
4239         }
4240
4241         return (ISC_R_SUCCESS);
4242 }
4243
4244 static int
4245 count_zones(const cfg_obj_t *conf) {
4246         const cfg_obj_t *zonelist = NULL;
4247         const cfg_listelt_t *element;
4248         int n = 0;
4249
4250         REQUIRE(conf != NULL);
4251
4252         cfg_map_get(conf, "zone", &zonelist);
4253         for (element = cfg_list_first(zonelist);
4254              element != NULL;
4255              element = cfg_list_next(element))
4256                 n++;
4257
4258         return (n);
4259 }
4260
4261 static isc_result_t
4262 load_configuration(const char *filename, ns_server_t *server,
4263                    isc_boolean_t first_time)
4264 {
4265         cfg_obj_t *config = NULL, *bindkeys = NULL;
4266         cfg_parser_t *conf_parser = NULL, *bindkeys_parser = NULL;
4267         const cfg_listelt_t *element;
4268         const cfg_obj_t *builtin_views;
4269         const cfg_obj_t *maps[3];
4270         const cfg_obj_t *obj;
4271         const cfg_obj_t *options;
4272         const cfg_obj_t *usev4ports, *avoidv4ports, *usev6ports, *avoidv6ports;
4273         const cfg_obj_t *views;
4274         dns_view_t *view = NULL;
4275         dns_view_t *view_next;
4276         dns_viewlist_t tmpviewlist;
4277         dns_viewlist_t viewlist, builtin_viewlist;
4278         in_port_t listen_port, udpport_low, udpport_high;
4279         int i;
4280         isc_interval_t interval;
4281         isc_portset_t *v4portset = NULL;
4282         isc_portset_t *v6portset = NULL;
4283         isc_resourcevalue_t nfiles;
4284         isc_result_t result;
4285         isc_uint32_t heartbeat_interval;
4286         isc_uint32_t interface_interval;
4287         isc_uint32_t reserved;
4288         isc_uint32_t udpsize;
4289         ns_cachelist_t cachelist, tmpcachelist;
4290         unsigned int maxsocks;
4291         ns_cache_t *nsc;
4292         struct cfg_context *nzctx;
4293         int num_zones = 0;
4294         isc_boolean_t exclusive = ISC_FALSE;
4295
4296         ISC_LIST_INIT(viewlist);
4297         ISC_LIST_INIT(builtin_viewlist);
4298         ISC_LIST_INIT(cachelist);
4299
4300         /* Create the ACL configuration context */
4301         if (ns_g_aclconfctx != NULL)
4302                 cfg_aclconfctx_detach(&ns_g_aclconfctx);
4303         CHECK(cfg_aclconfctx_create(ns_g_mctx, &ns_g_aclconfctx));
4304
4305         /*
4306          * Parse the global default pseudo-config file.
4307          */
4308         if (first_time) {
4309                 CHECK(ns_config_parsedefaults(ns_g_parser, &ns_g_config));
4310                 RUNTIME_CHECK(cfg_map_get(ns_g_config, "options",
4311                                           &ns_g_defaults) == ISC_R_SUCCESS);
4312         }
4313
4314         /*
4315          * Parse the configuration file using the new config code.
4316          */
4317         result = ISC_R_FAILURE;
4318         config = NULL;
4319
4320         /*
4321          * Unless this is lwresd with the -C option, parse the config file.
4322          */
4323         if (!(ns_g_lwresdonly && lwresd_g_useresolvconf)) {
4324                 isc_log_write(ns_g_lctx,
4325                               NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
4326                               ISC_LOG_INFO, "loading configuration from '%s'",
4327                               filename);
4328                 CHECK(cfg_parser_create(ns_g_mctx, ns_g_lctx, &conf_parser));
4329                 cfg_parser_setcallback(conf_parser, directory_callback, NULL);
4330                 result = cfg_parse_file(conf_parser, filename,
4331                                         &cfg_type_namedconf, &config);
4332         }
4333
4334         /*
4335          * If this is lwresd with the -C option, or lwresd with no -C or -c
4336          * option where the above parsing failed, parse resolv.conf.
4337          */
4338         if (ns_g_lwresdonly &&
4339             (lwresd_g_useresolvconf ||
4340              (!ns_g_conffileset && result == ISC_R_FILENOTFOUND)))
4341         {
4342                 isc_log_write(ns_g_lctx,
4343                               NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
4344                               ISC_LOG_INFO, "loading configuration from '%s'",
4345                               lwresd_g_resolvconffile);
4346                 if (conf_parser != NULL)
4347                         cfg_parser_destroy(&conf_parser);
4348                 CHECK(cfg_parser_create(ns_g_mctx, ns_g_lctx, &conf_parser));
4349                 result = ns_lwresd_parseeresolvconf(ns_g_mctx, conf_parser,
4350                                                     &config);
4351         }
4352         CHECK(result);
4353
4354         /*
4355          * Check the validity of the configuration.
4356          */
4357         CHECK(bind9_check_namedconf(config, ns_g_lctx, ns_g_mctx));
4358
4359         /*
4360          * Fill in the maps array, used for resolving defaults.
4361          */
4362         i = 0;
4363         options = NULL;
4364         result = cfg_map_get(config, "options", &options);
4365         if (result == ISC_R_SUCCESS)
4366                 maps[i++] = options;
4367         maps[i++] = ns_g_defaults;
4368         maps[i] = NULL;
4369
4370         /*
4371          * If bind.keys exists, load it.  If "dnssec-lookaside auto"
4372          * is turned on, the keys found there will be used as default
4373          * trust anchors.
4374          */
4375         obj = NULL;
4376         result = ns_config_get(maps, "bindkeys-file", &obj);
4377         INSIST(result == ISC_R_SUCCESS);
4378         CHECKM(setstring(server, &server->bindkeysfile,
4379                cfg_obj_asstring(obj)), "strdup");
4380
4381         if (access(server->bindkeysfile, R_OK) == 0) {
4382                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4383                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4384                               "reading built-in trusted "
4385                               "keys from file '%s'", server->bindkeysfile);
4386
4387                 CHECK(cfg_parser_create(ns_g_mctx, ns_g_lctx,
4388                                         &bindkeys_parser));
4389
4390                 result = cfg_parse_file(bindkeys_parser, server->bindkeysfile,
4391                                         &cfg_type_bindkeys, &bindkeys);
4392                 CHECK(result);
4393         }
4394
4395         /* Ensure exclusive access to configuration data. */
4396         if (!exclusive) {
4397                 result = isc_task_beginexclusive(server->task);
4398                 RUNTIME_CHECK(result == ISC_R_SUCCESS);
4399                 exclusive = ISC_TRUE;
4400         }
4401
4402         /*
4403          * Set process limits, which (usually) needs to be done as root.
4404          */
4405         set_limits(maps);
4406
4407         /*
4408          * Check if max number of open sockets that the system allows is
4409          * sufficiently large.  Failing this condition is not necessarily fatal,
4410          * but may cause subsequent runtime failures for a busy recursive
4411          * server.
4412          */
4413         result = isc_socketmgr_getmaxsockets(ns_g_socketmgr, &maxsocks);
4414         if (result != ISC_R_SUCCESS)
4415                 maxsocks = 0;
4416         result = isc_resource_getcurlimit(isc_resource_openfiles, &nfiles);
4417         if (result == ISC_R_SUCCESS && (isc_resourcevalue_t)maxsocks > nfiles) {
4418                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4419                               NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
4420                               "max open files (%" ISC_PRINT_QUADFORMAT "u)"
4421                               " is smaller than max sockets (%u)",
4422                               nfiles, maxsocks);
4423         }
4424
4425         /*
4426          * Set the number of socket reserved for TCP, stdio etc.
4427          */
4428         obj = NULL;
4429         result = ns_config_get(maps, "reserved-sockets", &obj);
4430         INSIST(result == ISC_R_SUCCESS);
4431         reserved = cfg_obj_asuint32(obj);
4432         if (maxsocks != 0) {
4433                 if (maxsocks < 128U)                    /* Prevent underflow. */
4434                         reserved = 0;
4435                 else if (reserved > maxsocks - 128U)    /* Minimum UDP space. */
4436                         reserved = maxsocks - 128;
4437         }
4438         /* Minimum TCP/stdio space. */
4439         if (reserved < 128U)
4440                 reserved = 128;
4441         if (reserved + 128U > maxsocks && maxsocks != 0) {
4442                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4443                               NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
4444                               "less than 128 UDP sockets available after "
4445                               "applying 'reserved-sockets' and 'maxsockets'");
4446         }
4447         isc__socketmgr_setreserved(ns_g_socketmgr, reserved);
4448
4449         /*
4450          * Configure various server options.
4451          */
4452         configure_server_quota(maps, "transfers-out", &server->xfroutquota);
4453         configure_server_quota(maps, "tcp-clients", &server->tcpquota);
4454         configure_server_quota(maps, "recursive-clients",
4455                                &server->recursionquota);
4456         if (server->recursionquota.max > 1000)
4457                 isc_quota_soft(&server->recursionquota,
4458                                server->recursionquota.max - 100);
4459         else
4460                 isc_quota_soft(&server->recursionquota, 0);
4461
4462         CHECK(configure_view_acl(NULL, config, "blackhole", NULL,
4463                                  ns_g_aclconfctx, ns_g_mctx,
4464                                  &server->blackholeacl));
4465         if (server->blackholeacl != NULL)
4466                 dns_dispatchmgr_setblackhole(ns_g_dispatchmgr,
4467                                              server->blackholeacl);
4468
4469         obj = NULL;
4470         result = ns_config_get(maps, "match-mapped-addresses", &obj);
4471         INSIST(result == ISC_R_SUCCESS);
4472         server->aclenv.match_mapped = cfg_obj_asboolean(obj);
4473
4474         CHECKM(ns_statschannels_configure(ns_g_server, config, ns_g_aclconfctx),
4475                "configuring statistics server(s)");
4476
4477         /*
4478          * Configure sets of UDP query source ports.
4479          */
4480         CHECKM(isc_portset_create(ns_g_mctx, &v4portset),
4481                "creating UDP port set");
4482         CHECKM(isc_portset_create(ns_g_mctx, &v6portset),
4483                "creating UDP port set");
4484
4485         usev4ports = NULL;
4486         usev6ports = NULL;
4487         avoidv4ports = NULL;
4488         avoidv6ports = NULL;
4489
4490         (void)ns_config_get(maps, "use-v4-udp-ports", &usev4ports);
4491         if (usev4ports != NULL)
4492                 portset_fromconf(v4portset, usev4ports, ISC_TRUE);
4493         else {
4494                 CHECKM(isc_net_getudpportrange(AF_INET, &udpport_low,
4495                                                &udpport_high),
4496                        "get the default UDP/IPv4 port range");
4497                 if (udpport_low == udpport_high)
4498                         isc_portset_add(v4portset, udpport_low);
4499                 else {
4500                         isc_portset_addrange(v4portset, udpport_low,
4501                                              udpport_high);
4502                 }
4503                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4504                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4505                               "using default UDP/IPv4 port range: [%d, %d]",
4506                               udpport_low, udpport_high);
4507         }
4508         (void)ns_config_get(maps, "avoid-v4-udp-ports", &avoidv4ports);
4509         if (avoidv4ports != NULL)
4510                 portset_fromconf(v4portset, avoidv4ports, ISC_FALSE);
4511
4512         (void)ns_config_get(maps, "use-v6-udp-ports", &usev6ports);
4513         if (usev6ports != NULL)
4514                 portset_fromconf(v6portset, usev6ports, ISC_TRUE);
4515         else {
4516                 CHECKM(isc_net_getudpportrange(AF_INET6, &udpport_low,
4517                                                &udpport_high),
4518                        "get the default UDP/IPv6 port range");
4519                 if (udpport_low == udpport_high)
4520                         isc_portset_add(v6portset, udpport_low);
4521                 else {
4522                         isc_portset_addrange(v6portset, udpport_low,
4523                                              udpport_high);
4524                 }
4525                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4526                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4527                               "using default UDP/IPv6 port range: [%d, %d]",
4528                               udpport_low, udpport_high);
4529         }
4530         (void)ns_config_get(maps, "avoid-v6-udp-ports", &avoidv6ports);
4531         if (avoidv6ports != NULL)
4532                 portset_fromconf(v6portset, avoidv6ports, ISC_FALSE);
4533
4534         dns_dispatchmgr_setavailports(ns_g_dispatchmgr, v4portset, v6portset);
4535
4536         /*
4537          * Set the EDNS UDP size when we don't match a view.
4538          */
4539         obj = NULL;
4540         result = ns_config_get(maps, "edns-udp-size", &obj);
4541         INSIST(result == ISC_R_SUCCESS);
4542         udpsize = cfg_obj_asuint32(obj);
4543         if (udpsize < 512)
4544                 udpsize = 512;
4545         if (udpsize > 4096)
4546                 udpsize = 4096;
4547         ns_g_udpsize = (isc_uint16_t)udpsize;
4548
4549         /*
4550          * Configure the zone manager.
4551          */
4552         obj = NULL;
4553         result = ns_config_get(maps, "transfers-in", &obj);
4554         INSIST(result == ISC_R_SUCCESS);
4555         dns_zonemgr_settransfersin(server->zonemgr, cfg_obj_asuint32(obj));
4556
4557         obj = NULL;
4558         result = ns_config_get(maps, "transfers-per-ns", &obj);
4559         INSIST(result == ISC_R_SUCCESS);
4560         dns_zonemgr_settransfersperns(server->zonemgr, cfg_obj_asuint32(obj));
4561
4562         obj = NULL;
4563         result = ns_config_get(maps, "serial-query-rate", &obj);
4564         INSIST(result == ISC_R_SUCCESS);
4565         dns_zonemgr_setserialqueryrate(server->zonemgr, cfg_obj_asuint32(obj));
4566
4567         /*
4568          * Determine which port to use for listening for incoming connections.
4569          */
4570         if (ns_g_port != 0)
4571                 listen_port = ns_g_port;
4572         else
4573                 CHECKM(ns_config_getport(config, &listen_port), "port");
4574
4575         /*
4576          * Find the listen queue depth.
4577          */
4578         obj = NULL;
4579         result = ns_config_get(maps, "tcp-listen-queue", &obj);
4580         INSIST(result == ISC_R_SUCCESS);
4581         ns_g_listen = cfg_obj_asuint32(obj);
4582         if (ns_g_listen < 3)
4583                 ns_g_listen = 3;
4584
4585         /*
4586          * Configure the interface manager according to the "listen-on"
4587          * statement.
4588          */
4589         {
4590                 const cfg_obj_t *clistenon = NULL;
4591                 ns_listenlist_t *listenon = NULL;
4592
4593                 clistenon = NULL;
4594                 /*
4595                  * Even though listen-on is present in the default
4596                  * configuration, we can't use it here, since it isn't
4597                  * used if we're in lwresd mode.  This way is easier.
4598                  */
4599                 if (options != NULL)
4600                         (void)cfg_map_get(options, "listen-on", &clistenon);
4601                 if (clistenon != NULL) {
4602                         /* check return code? */
4603                         (void)ns_listenlist_fromconfig(clistenon, config,
4604                                                        ns_g_aclconfctx,
4605                                                        ns_g_mctx, &listenon);
4606                 } else if (!ns_g_lwresdonly) {
4607                         /*
4608                          * Not specified, use default.
4609                          */
4610                         CHECK(ns_listenlist_default(ns_g_mctx, listen_port,
4611                                                     ISC_TRUE, &listenon));
4612                 }
4613                 if (listenon != NULL) {
4614                         ns_interfacemgr_setlistenon4(server->interfacemgr,
4615                                                      listenon);
4616                         ns_listenlist_detach(&listenon);
4617                 }
4618         }
4619         /*
4620          * Ditto for IPv6.
4621          */
4622         {
4623                 const cfg_obj_t *clistenon = NULL;
4624                 ns_listenlist_t *listenon = NULL;
4625
4626                 if (options != NULL)
4627                         (void)cfg_map_get(options, "listen-on-v6", &clistenon);
4628                 if (clistenon != NULL) {
4629                         /* check return code? */
4630                         (void)ns_listenlist_fromconfig(clistenon, config,
4631                                                        ns_g_aclconfctx,
4632                                                        ns_g_mctx, &listenon);
4633                 } else if (!ns_g_lwresdonly) {
4634                         isc_boolean_t enable;
4635                         /*
4636                          * Not specified, use default.
4637                          */
4638                         enable = ISC_TF(isc_net_probeipv4() != ISC_R_SUCCESS);
4639                         CHECK(ns_listenlist_default(ns_g_mctx, listen_port,
4640                                                     enable, &listenon));
4641                 }
4642                 if (listenon != NULL) {
4643                         ns_interfacemgr_setlistenon6(server->interfacemgr,
4644                                                      listenon);
4645                         ns_listenlist_detach(&listenon);
4646                 }
4647         }
4648
4649         /*
4650          * Rescan the interface list to pick up changes in the
4651          * listen-on option.  It's important that we do this before we try
4652          * to configure the query source, since the dispatcher we use might
4653          * be shared with an interface.
4654          */
4655         scan_interfaces(server, ISC_TRUE);
4656
4657         /*
4658          * Arrange for further interface scanning to occur periodically
4659          * as specified by the "interface-interval" option.
4660          */
4661         obj = NULL;
4662         result = ns_config_get(maps, "interface-interval", &obj);
4663         INSIST(result == ISC_R_SUCCESS);
4664         interface_interval = cfg_obj_asuint32(obj) * 60;
4665         if (interface_interval == 0) {
4666                 CHECK(isc_timer_reset(server->interface_timer,
4667                                       isc_timertype_inactive,
4668                                       NULL, NULL, ISC_TRUE));
4669         } else if (server->interface_interval != interface_interval) {
4670                 isc_interval_set(&interval, interface_interval, 0);
4671                 CHECK(isc_timer_reset(server->interface_timer,
4672                                       isc_timertype_ticker,
4673                                       NULL, &interval, ISC_FALSE));
4674         }
4675         server->interface_interval = interface_interval;
4676
4677         /*
4678          * Configure the dialup heartbeat timer.
4679          */
4680         obj = NULL;
4681         result = ns_config_get(maps, "heartbeat-interval", &obj);
4682         INSIST(result == ISC_R_SUCCESS);
4683         heartbeat_interval = cfg_obj_asuint32(obj) * 60;
4684         if (heartbeat_interval == 0) {
4685                 CHECK(isc_timer_reset(server->heartbeat_timer,
4686                                       isc_timertype_inactive,
4687                                       NULL, NULL, ISC_TRUE));
4688         } else if (server->heartbeat_interval != heartbeat_interval) {
4689                 isc_interval_set(&interval, heartbeat_interval, 0);
4690                 CHECK(isc_timer_reset(server->heartbeat_timer,
4691                                       isc_timertype_ticker,
4692                                       NULL, &interval, ISC_FALSE));
4693         }
4694         server->heartbeat_interval = heartbeat_interval;
4695
4696         isc_interval_set(&interval, 1200, 0);
4697         CHECK(isc_timer_reset(server->pps_timer, isc_timertype_ticker, NULL,
4698                               &interval, ISC_FALSE));
4699
4700         /*
4701          * Write the PID file.
4702          */
4703         obj = NULL;
4704         if (ns_config_get(maps, "pid-file", &obj) == ISC_R_SUCCESS)
4705                 if (cfg_obj_isvoid(obj))
4706                         ns_os_writepidfile(NULL, first_time);
4707                 else
4708                         ns_os_writepidfile(cfg_obj_asstring(obj), first_time);
4709         else if (ns_g_lwresdonly)
4710                 ns_os_writepidfile(lwresd_g_defaultpidfile, first_time);
4711         else
4712                 ns_os_writepidfile(ns_g_defaultpidfile, first_time);
4713
4714         /*
4715          * Configure the server-wide session key.  This must be done before
4716          * configure views because zone configuration may need to know
4717          * session-keyname.
4718          *
4719          * Failure of session key generation isn't fatal at this time; if it
4720          * turns out that a session key is really needed but doesn't exist,
4721          * we'll treat it as a fatal error then.
4722          */
4723         (void)configure_session_key(maps, server, ns_g_mctx);
4724
4725         views = NULL;
4726         (void)cfg_map_get(config, "view", &views);
4727
4728         /*
4729          * Create the views and count all the configured zones in
4730          * order to correctly size the zone manager's task table.
4731          * (We only count zones for configured views; the built-in
4732          * "bind" view can be ignored as it only adds a negligible
4733          * number of zones.)
4734          *
4735          * If we're allowing new zones, we need to be able to find the
4736          * new zone file and count those as well.  So we setup the new
4737          * zone configuration context, but otherwise view configuration
4738          * waits until after the zone manager's task list has been sized.
4739          */
4740         for (element = cfg_list_first(views);
4741              element != NULL;
4742              element = cfg_list_next(element))
4743         {
4744                 cfg_obj_t *vconfig = cfg_listelt_value(element);
4745                 const cfg_obj_t *voptions = cfg_tuple_get(vconfig, "options");
4746                 view = NULL;
4747
4748                 CHECK(create_view(vconfig, &viewlist, &view));
4749                 INSIST(view != NULL);
4750
4751                 num_zones += count_zones(voptions);
4752                 CHECK(setup_newzones(view, config, vconfig, conf_parser,
4753                                      ns_g_aclconfctx));
4754
4755                 nzctx = view->new_zone_config;
4756                 if (nzctx != NULL && nzctx->nzconfig != NULL)
4757                         num_zones += count_zones(nzctx->nzconfig);
4758
4759                 dns_view_detach(&view);
4760         }
4761
4762         /*
4763          * If there were no explicit views then we do the default
4764          * view here.
4765          */
4766         if (views == NULL) {
4767                 CHECK(create_view(NULL, &viewlist, &view));
4768                 INSIST(view != NULL);
4769
4770                 num_zones = count_zones(config);
4771
4772                 CHECK(setup_newzones(view, config, NULL,  conf_parser,
4773                                      ns_g_aclconfctx));
4774
4775                 nzctx = view->new_zone_config;
4776                 if (nzctx != NULL && nzctx->nzconfig != NULL)
4777                         num_zones += count_zones(nzctx->nzconfig);
4778
4779                 dns_view_detach(&view);
4780         }
4781
4782         /*
4783          * Zones have been counted; set the zone manager task pool size.
4784          */
4785         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4786                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4787                       "sizing zone task pool based on %d zones", num_zones);
4788         CHECK(dns_zonemgr_setsize(ns_g_server->zonemgr, num_zones));
4789
4790         /*
4791          * Configure and freeze all explicit views.  Explicit
4792          * views that have zones were already created at parsing
4793          * time, but views with no zones must be created here.
4794          */
4795         for (element = cfg_list_first(views);
4796              element != NULL;
4797              element = cfg_list_next(element))
4798         {
4799                 cfg_obj_t *vconfig = cfg_listelt_value(element);
4800
4801                 view = NULL;
4802                 CHECK(find_view(vconfig, &viewlist, &view));
4803                 CHECK(configure_view(view, config, vconfig,
4804                                      &cachelist, bindkeys, ns_g_mctx,
4805                                      ns_g_aclconfctx, ISC_TRUE));
4806                 dns_view_freeze(view);
4807                 dns_view_detach(&view);
4808         }
4809
4810         /*
4811          * Make sure we have a default view if and only if there
4812          * were no explicit views.
4813          */
4814         if (views == NULL) {
4815                 view = NULL;
4816                 CHECK(find_view(NULL, &viewlist, &view));
4817                 CHECK(configure_view(view, config, NULL,
4818                                      &cachelist, bindkeys,
4819                                      ns_g_mctx, ns_g_aclconfctx, ISC_TRUE));
4820                 dns_view_freeze(view);
4821                 dns_view_detach(&view);
4822         }
4823
4824         /*
4825          * Create (or recreate) the built-in views.
4826          */
4827         builtin_views = NULL;
4828         RUNTIME_CHECK(cfg_map_get(ns_g_config, "view",
4829                                   &builtin_views) == ISC_R_SUCCESS);
4830         for (element = cfg_list_first(builtin_views);
4831              element != NULL;
4832              element = cfg_list_next(element))
4833         {
4834                 cfg_obj_t *vconfig = cfg_listelt_value(element);
4835
4836                 CHECK(create_view(vconfig, &builtin_viewlist, &view));
4837                 CHECK(configure_view(view, config, vconfig,
4838                                      &cachelist, bindkeys,
4839                                      ns_g_mctx, ns_g_aclconfctx, ISC_FALSE));
4840                 dns_view_freeze(view);
4841                 dns_view_detach(&view);
4842                 view = NULL;
4843         }
4844
4845         /* Now combine the two viewlists into one */
4846         ISC_LIST_APPENDLIST(viewlist, builtin_viewlist, link);
4847
4848         /* Swap our new view list with the production one. */
4849         tmpviewlist = server->viewlist;
4850         server->viewlist = viewlist;
4851         viewlist = tmpviewlist;
4852
4853         /* Make the view list available to each of the views */
4854         view = ISC_LIST_HEAD(server->viewlist);
4855         while (view != NULL) {
4856                 view->viewlist = &server->viewlist;
4857                 view = ISC_LIST_NEXT(view, link);
4858         }
4859
4860         /* Swap our new cache list with the production one. */
4861         tmpcachelist = server->cachelist;
4862         server->cachelist = cachelist;
4863         cachelist = tmpcachelist;
4864
4865         /* Load the TKEY information from the configuration. */
4866         if (options != NULL) {
4867                 dns_tkeyctx_t *t = NULL;
4868                 CHECKM(ns_tkeyctx_fromconfig(options, ns_g_mctx, ns_g_entropy,
4869                                              &t),
4870                        "configuring TKEY");
4871                 if (server->tkeyctx != NULL)
4872                         dns_tkeyctx_destroy(&server->tkeyctx);
4873                 server->tkeyctx = t;
4874         }
4875
4876         /*
4877          * Bind the control port(s).
4878          */
4879         CHECKM(ns_controls_configure(ns_g_server->controls, config,
4880                                      ns_g_aclconfctx),
4881                "binding control channel(s)");
4882
4883         /*
4884          * Bind the lwresd port(s).
4885          */
4886         CHECKM(ns_lwresd_configure(ns_g_mctx, config),
4887                "binding lightweight resolver ports");
4888
4889         /*
4890          * Open the source of entropy.
4891          */
4892         if (first_time) {
4893                 obj = NULL;
4894                 result = ns_config_get(maps, "random-device", &obj);
4895                 if (result != ISC_R_SUCCESS) {
4896                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4897                                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4898                                       "no source of entropy found");
4899                 } else {
4900                         const char *randomdev = cfg_obj_asstring(obj);
4901                         result = isc_entropy_createfilesource(ns_g_entropy,
4902                                                               randomdev);
4903                         if (result != ISC_R_SUCCESS)
4904                                 isc_log_write(ns_g_lctx,
4905                                               NS_LOGCATEGORY_GENERAL,
4906                                               NS_LOGMODULE_SERVER,
4907                                               ISC_LOG_INFO,
4908                                               "could not open entropy source "
4909                                               "%s: %s",
4910                                               randomdev,
4911                                               isc_result_totext(result));
4912 #ifdef PATH_RANDOMDEV
4913                         if (ns_g_fallbackentropy != NULL) {
4914                                 if (result != ISC_R_SUCCESS) {
4915                                         isc_log_write(ns_g_lctx,
4916                                                       NS_LOGCATEGORY_GENERAL,
4917                                                       NS_LOGMODULE_SERVER,
4918                                                       ISC_LOG_INFO,
4919                                                       "using pre-chroot entropy source "
4920                                                       "%s",
4921                                                       PATH_RANDOMDEV);
4922                                         isc_entropy_detach(&ns_g_entropy);
4923                                         isc_entropy_attach(ns_g_fallbackentropy,
4924                                                            &ns_g_entropy);
4925                                 }
4926                                 isc_entropy_detach(&ns_g_fallbackentropy);
4927                         }
4928 #endif
4929                 }
4930         }
4931
4932         /*
4933          * Relinquish root privileges.
4934          */
4935         if (first_time)
4936                 ns_os_changeuser();
4937
4938         /*
4939          * Check that the working directory is writable.
4940          */
4941         if (access(".", W_OK) != 0) {
4942                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4943                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
4944                               "the working directory is not writable");
4945         }
4946
4947         /*
4948          * Configure the logging system.
4949          *
4950          * Do this after changing UID to make sure that any log
4951          * files specified in named.conf get created by the
4952          * unprivileged user, not root.
4953          */
4954         if (ns_g_logstderr) {
4955                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4956                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4957                               "ignoring config file logging "
4958                               "statement due to -g option");
4959         } else {
4960                 const cfg_obj_t *logobj = NULL;
4961                 isc_logconfig_t *logc = NULL;
4962
4963                 CHECKM(isc_logconfig_create(ns_g_lctx, &logc),
4964                        "creating new logging configuration");
4965
4966                 logobj = NULL;
4967                 (void)cfg_map_get(config, "logging", &logobj);
4968                 if (logobj != NULL) {
4969                         CHECKM(ns_log_configure(logc, logobj),
4970                                "configuring logging");
4971                 } else {
4972                         CHECKM(ns_log_setdefaultchannels(logc),
4973                                "setting up default logging channels");
4974                         CHECKM(ns_log_setunmatchedcategory(logc),
4975                                "setting up default 'category unmatched'");
4976                         CHECKM(ns_log_setdefaultcategory(logc),
4977                                "setting up default 'category default'");
4978                 }
4979
4980                 result = isc_logconfig_use(ns_g_lctx, logc);
4981                 if (result != ISC_R_SUCCESS) {
4982                         isc_logconfig_destroy(&logc);
4983                         CHECKM(result, "installing logging configuration");
4984                 }
4985
4986                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4987                               NS_LOGMODULE_SERVER, ISC_LOG_DEBUG(1),
4988                               "now using logging configuration from "
4989                               "config file");
4990         }
4991
4992         /*
4993          * Set the default value of the query logging flag depending
4994          * whether a "queries" category has been defined.  This is
4995          * a disgusting hack, but we need to do this for BIND 8
4996          * compatibility.
4997          */
4998         if (first_time) {
4999                 const cfg_obj_t *logobj = NULL;
5000                 const cfg_obj_t *categories = NULL;
5001
5002                 obj = NULL;
5003                 if (ns_config_get(maps, "querylog", &obj) == ISC_R_SUCCESS) {
5004                         server->log_queries = cfg_obj_asboolean(obj);
5005                 } else {
5006
5007                         (void)cfg_map_get(config, "logging", &logobj);
5008                         if (logobj != NULL)
5009                                 (void)cfg_map_get(logobj, "category",
5010                                                   &categories);
5011                         if (categories != NULL) {
5012                                 const cfg_listelt_t *element;
5013                                 for (element = cfg_list_first(categories);
5014                                      element != NULL;
5015                                      element = cfg_list_next(element))
5016                                 {
5017                                         const cfg_obj_t *catobj;
5018                                         const char *str;
5019
5020                                         obj = cfg_listelt_value(element);
5021                                         catobj = cfg_tuple_get(obj, "name");
5022                                         str = cfg_obj_asstring(catobj);
5023                                         if (strcasecmp(str, "queries") == 0)
5024                                                 server->log_queries = ISC_TRUE;
5025                                 }
5026                         }
5027                 }
5028         }
5029
5030
5031         obj = NULL;
5032         if (options != NULL &&
5033             cfg_map_get(options, "memstatistics", &obj) == ISC_R_SUCCESS)
5034                 ns_g_memstatistics = cfg_obj_asboolean(obj);
5035         else
5036                 ns_g_memstatistics =
5037                         ISC_TF((isc_mem_debugging & ISC_MEM_DEBUGRECORD) != 0);
5038
5039         obj = NULL;
5040         if (ns_config_get(maps, "memstatistics-file", &obj) == ISC_R_SUCCESS)
5041                 ns_main_setmemstats(cfg_obj_asstring(obj));
5042         else if (ns_g_memstatistics)
5043                 ns_main_setmemstats("named.memstats");
5044         else
5045                 ns_main_setmemstats(NULL);
5046
5047         obj = NULL;
5048         result = ns_config_get(maps, "statistics-file", &obj);
5049         INSIST(result == ISC_R_SUCCESS);
5050         CHECKM(setstring(server, &server->statsfile, cfg_obj_asstring(obj)),
5051                "strdup");
5052
5053         obj = NULL;
5054         result = ns_config_get(maps, "dump-file", &obj);
5055         INSIST(result == ISC_R_SUCCESS);
5056         CHECKM(setstring(server, &server->dumpfile, cfg_obj_asstring(obj)),
5057                "strdup");
5058
5059         obj = NULL;
5060         result = ns_config_get(maps, "secroots-file", &obj);
5061         INSIST(result == ISC_R_SUCCESS);
5062         CHECKM(setstring(server, &server->secrootsfile, cfg_obj_asstring(obj)),
5063                "strdup");
5064
5065         obj = NULL;
5066         result = ns_config_get(maps, "recursing-file", &obj);
5067         INSIST(result == ISC_R_SUCCESS);
5068         CHECKM(setstring(server, &server->recfile, cfg_obj_asstring(obj)),
5069                "strdup");
5070
5071         obj = NULL;
5072         result = ns_config_get(maps, "version", &obj);
5073         if (result == ISC_R_SUCCESS) {
5074                 CHECKM(setoptstring(server, &server->version, obj), "strdup");
5075                 server->version_set = ISC_TRUE;
5076         } else {
5077                 server->version_set = ISC_FALSE;
5078         }
5079
5080         obj = NULL;
5081         result = ns_config_get(maps, "hostname", &obj);
5082         if (result == ISC_R_SUCCESS) {
5083                 CHECKM(setoptstring(server, &server->hostname, obj), "strdup");
5084                 server->hostname_set = ISC_TRUE;
5085         } else {
5086                 server->hostname_set = ISC_FALSE;
5087         }
5088
5089         obj = NULL;
5090         result = ns_config_get(maps, "server-id", &obj);
5091         server->server_usehostname = ISC_FALSE;
5092         if (result == ISC_R_SUCCESS && cfg_obj_isboolean(obj)) {
5093                 /* The parser translates "hostname" to ISC_TRUE */
5094                 server->server_usehostname = cfg_obj_asboolean(obj);
5095                 result = setstring(server, &server->server_id, NULL);
5096                 RUNTIME_CHECK(result == ISC_R_SUCCESS);
5097         } else if (result == ISC_R_SUCCESS) {
5098                 /* Found a quoted string */
5099                 CHECKM(setoptstring(server, &server->server_id, obj), "strdup");
5100         } else {
5101                 result = setstring(server, &server->server_id, NULL);
5102                 RUNTIME_CHECK(result == ISC_R_SUCCESS);
5103         }
5104
5105         obj = NULL;
5106         result = ns_config_get(maps, "flush-zones-on-shutdown", &obj);
5107         if (result == ISC_R_SUCCESS) {
5108                 server->flushonshutdown = cfg_obj_asboolean(obj);
5109         } else {
5110                 server->flushonshutdown = ISC_FALSE;
5111         }
5112
5113         result = ISC_R_SUCCESS;
5114
5115  cleanup:
5116         if (v4portset != NULL)
5117                 isc_portset_destroy(ns_g_mctx, &v4portset);
5118
5119         if (v6portset != NULL)
5120                 isc_portset_destroy(ns_g_mctx, &v6portset);
5121
5122         if (conf_parser != NULL) {
5123                 if (config != NULL)
5124                         cfg_obj_destroy(conf_parser, &config);
5125                 cfg_parser_destroy(&conf_parser);
5126         }
5127
5128         if (bindkeys_parser != NULL) {
5129                 if (bindkeys  != NULL)
5130                         cfg_obj_destroy(bindkeys_parser, &bindkeys);
5131                 cfg_parser_destroy(&bindkeys_parser);
5132         }
5133
5134         if (view != NULL)
5135                 dns_view_detach(&view);
5136
5137         /*
5138          * This cleans up either the old production view list
5139          * or our temporary list depending on whether they
5140          * were swapped above or not.
5141          */
5142         for (view = ISC_LIST_HEAD(viewlist);
5143              view != NULL;
5144              view = view_next) {
5145                 view_next = ISC_LIST_NEXT(view, link);
5146                 ISC_LIST_UNLINK(viewlist, view, link);
5147                 if (result == ISC_R_SUCCESS &&
5148                     strcmp(view->name, "_bind") != 0)
5149                         (void)dns_zt_apply(view->zonetable, ISC_FALSE,
5150                                            removed, view);
5151                 dns_view_detach(&view);
5152         }
5153
5154         /* Same cleanup for cache list. */
5155         while ((nsc = ISC_LIST_HEAD(cachelist)) != NULL) {
5156                 ISC_LIST_UNLINK(cachelist, nsc, link);
5157                 dns_cache_detach(&nsc->cache);
5158                 isc_mem_put(server->mctx, nsc, sizeof(*nsc));
5159         }
5160
5161         /*
5162          * Adjust the listening interfaces in accordance with the source
5163          * addresses specified in views and zones.
5164          */
5165         if (isc_net_probeipv6() == ISC_R_SUCCESS)
5166                 adjust_interfaces(server, ns_g_mctx);
5167
5168         /* Relinquish exclusive access to configuration data. */
5169         if (exclusive)
5170                 isc_task_endexclusive(server->task);
5171
5172         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
5173                       ISC_LOG_DEBUG(1), "load_configuration: %s",
5174                       isc_result_totext(result));
5175
5176         return (result);
5177 }
5178
5179 static isc_result_t
5180 load_zones(ns_server_t *server, isc_boolean_t stop) {
5181         isc_result_t result;
5182         dns_view_t *view;
5183
5184         result = isc_task_beginexclusive(server->task);
5185         RUNTIME_CHECK(result == ISC_R_SUCCESS);
5186
5187         /*
5188          * Load zone data from disk.
5189          */
5190         for (view = ISC_LIST_HEAD(server->viewlist);
5191              view != NULL;
5192              view = ISC_LIST_NEXT(view, link))
5193         {
5194                 CHECK(dns_view_load(view, stop));
5195                 if (view->managed_keys != NULL)
5196                         CHECK(dns_zone_load(view->managed_keys));
5197         }
5198
5199         /*
5200          * Force zone maintenance.  Do this after loading
5201          * so that we know when we need to force AXFR of
5202          * slave zones whose master files are missing.
5203          */
5204         CHECK(dns_zonemgr_forcemaint(server->zonemgr));
5205  cleanup:
5206         isc_task_endexclusive(server->task);
5207         return (result);
5208 }
5209
5210 static isc_result_t
5211 load_new_zones(ns_server_t *server, isc_boolean_t stop) {
5212         isc_result_t result;
5213         dns_view_t *view;
5214
5215         result = isc_task_beginexclusive(server->task);
5216         RUNTIME_CHECK(result == ISC_R_SUCCESS);
5217
5218         /*
5219          * Load zone data from disk.
5220          */
5221         for (view = ISC_LIST_HEAD(server->viewlist);
5222              view != NULL;
5223              view = ISC_LIST_NEXT(view, link))
5224         {
5225                 CHECK(dns_view_loadnew(view, stop));
5226
5227                 /* Load managed-keys data */
5228                 if (view->managed_keys != NULL)
5229                         CHECK(dns_zone_loadnew(view->managed_keys));
5230         }
5231
5232         /*
5233          * Resume zone XFRs.
5234          */
5235         dns_zonemgr_resumexfrs(server->zonemgr);
5236  cleanup:
5237         isc_task_endexclusive(server->task);
5238         return (result);
5239 }
5240
5241 static void
5242 run_server(isc_task_t *task, isc_event_t *event) {
5243         isc_result_t result;
5244         ns_server_t *server = (ns_server_t *)event->ev_arg;
5245
5246         INSIST(task == server->task);
5247
5248         isc_event_free(&event);
5249
5250         CHECKFATAL(dns_dispatchmgr_create(ns_g_mctx, ns_g_entropy,
5251                                           &ns_g_dispatchmgr),
5252                    "creating dispatch manager");
5253
5254         dns_dispatchmgr_setstats(ns_g_dispatchmgr, server->resolverstats);
5255
5256         CHECKFATAL(ns_interfacemgr_create(ns_g_mctx, ns_g_taskmgr,
5257                                           ns_g_socketmgr, ns_g_dispatchmgr,
5258                                           &server->interfacemgr),
5259                    "creating interface manager");
5260
5261         CHECKFATAL(isc_timer_create(ns_g_timermgr, isc_timertype_inactive,
5262                                     NULL, NULL, server->task,
5263                                     interface_timer_tick,
5264                                     server, &server->interface_timer),
5265                    "creating interface timer");
5266
5267         CHECKFATAL(isc_timer_create(ns_g_timermgr, isc_timertype_inactive,
5268                                     NULL, NULL, server->task,
5269                                     heartbeat_timer_tick,
5270                                     server, &server->heartbeat_timer),
5271                    "creating heartbeat timer");
5272
5273         CHECKFATAL(isc_timer_create(ns_g_timermgr, isc_timertype_inactive,
5274                                     NULL, NULL, server->task, pps_timer_tick,
5275                                     server, &server->pps_timer),
5276                    "creating pps timer");
5277
5278         CHECKFATAL(cfg_parser_create(ns_g_mctx, NULL, &ns_g_parser),
5279                    "creating default configuration parser");
5280
5281         if (ns_g_lwresdonly)
5282                 CHECKFATAL(load_configuration(lwresd_g_conffile, server,
5283                                               ISC_TRUE),
5284                            "loading configuration");
5285         else
5286                 CHECKFATAL(load_configuration(ns_g_conffile, server, ISC_TRUE),
5287                            "loading configuration");
5288
5289         isc_hash_init();
5290
5291         CHECKFATAL(load_zones(server, ISC_FALSE), "loading zones");
5292
5293         ns_os_started();
5294         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
5295                       ISC_LOG_NOTICE, "running");
5296 }
5297
5298 void
5299 ns_server_flushonshutdown(ns_server_t *server, isc_boolean_t flush) {
5300
5301         REQUIRE(NS_SERVER_VALID(server));
5302
5303         server->flushonshutdown = flush;
5304 }
5305
5306 static void
5307 shutdown_server(isc_task_t *task, isc_event_t *event) {
5308         isc_result_t result;
5309         dns_view_t *view, *view_next;
5310         ns_server_t *server = (ns_server_t *)event->ev_arg;
5311         isc_boolean_t flush = server->flushonshutdown;
5312         ns_cache_t *nsc;
5313
5314         UNUSED(task);
5315         INSIST(task == server->task);
5316
5317         result = isc_task_beginexclusive(server->task);
5318         RUNTIME_CHECK(result == ISC_R_SUCCESS);
5319
5320         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
5321                       ISC_LOG_INFO, "shutting down%s",
5322                       flush ? ": flushing changes" : "");
5323
5324         ns_statschannels_shutdown(server);
5325         ns_controls_shutdown(server->controls);
5326         end_reserved_dispatches(server, ISC_TRUE);
5327         cleanup_session_key(server, server->mctx);
5328
5329         if (ns_g_aclconfctx != NULL)
5330                 cfg_aclconfctx_detach(&ns_g_aclconfctx);
5331
5332         cfg_obj_destroy(ns_g_parser, &ns_g_config);
5333         cfg_parser_destroy(&ns_g_parser);
5334
5335         for (view = ISC_LIST_HEAD(server->viewlist);
5336              view != NULL;
5337              view = view_next) {
5338                 view_next = ISC_LIST_NEXT(view, link);
5339                 ISC_LIST_UNLINK(server->viewlist, view, link);
5340                 if (flush)
5341                         dns_view_flushanddetach(&view);
5342                 else
5343                         dns_view_detach(&view);
5344         }
5345
5346         while ((nsc = ISC_LIST_HEAD(server->cachelist)) != NULL) {
5347                 ISC_LIST_UNLINK(server->cachelist, nsc, link);
5348                 dns_cache_detach(&nsc->cache);
5349                 isc_mem_put(server->mctx, nsc, sizeof(*nsc));
5350         }
5351
5352         isc_timer_detach(&server->interface_timer);
5353         isc_timer_detach(&server->heartbeat_timer);
5354         isc_timer_detach(&server->pps_timer);
5355
5356         ns_interfacemgr_shutdown(server->interfacemgr);
5357         ns_interfacemgr_detach(&server->interfacemgr);
5358
5359         dns_dispatchmgr_destroy(&ns_g_dispatchmgr);
5360
5361         dns_zonemgr_shutdown(server->zonemgr);
5362
5363         if (ns_g_sessionkey != NULL) {
5364                 dns_tsigkey_detach(&ns_g_sessionkey);
5365                 dns_name_free(&ns_g_sessionkeyname, server->mctx);
5366         }
5367
5368         if (server->blackholeacl != NULL)
5369                 dns_acl_detach(&server->blackholeacl);
5370
5371         dns_db_detach(&server->in_roothints);
5372
5373         isc_task_endexclusive(server->task);
5374
5375         isc_task_detach(&server->task);
5376
5377         isc_event_free(&event);
5378 }
5379
5380 void
5381 ns_server_create(isc_mem_t *mctx, ns_server_t **serverp) {
5382         isc_result_t result;
5383         ns_server_t *server = isc_mem_get(mctx, sizeof(*server));
5384
5385         if (server == NULL)
5386                 fatal("allocating server object", ISC_R_NOMEMORY);
5387
5388         server->mctx = mctx;
5389         server->task = NULL;
5390
5391         /* Initialize configuration data with default values. */
5392
5393         result = isc_quota_init(&server->xfroutquota, 10);
5394         RUNTIME_CHECK(result == ISC_R_SUCCESS);
5395         result = isc_quota_init(&server->tcpquota, 10);
5396         RUNTIME_CHECK(result == ISC_R_SUCCESS);
5397         result = isc_quota_init(&server->recursionquota, 100);
5398         RUNTIME_CHECK(result == ISC_R_SUCCESS);
5399
5400         result = dns_aclenv_init(mctx, &server->aclenv);
5401         RUNTIME_CHECK(result == ISC_R_SUCCESS);
5402
5403         /* Initialize server data structures. */
5404         server->zonemgr = NULL;
5405         server->interfacemgr = NULL;
5406         ISC_LIST_INIT(server->viewlist);
5407         server->in_roothints = NULL;
5408         server->blackholeacl = NULL;
5409
5410         CHECKFATAL(dns_rootns_create(mctx, dns_rdataclass_in, NULL,
5411                                      &server->in_roothints),
5412                    "setting up root hints");
5413
5414         CHECKFATAL(isc_mutex_init(&server->reload_event_lock),
5415                    "initializing reload event lock");
5416         server->reload_event =
5417                 isc_event_allocate(ns_g_mctx, server,
5418                                    NS_EVENT_RELOAD,
5419                                    ns_server_reload,
5420                                    server,
5421                                    sizeof(isc_event_t));
5422         CHECKFATAL(server->reload_event == NULL ?
5423                    ISC_R_NOMEMORY : ISC_R_SUCCESS,
5424                    "allocating reload event");
5425
5426         CHECKFATAL(dst_lib_init2(ns_g_mctx, ns_g_entropy,
5427                                  ns_g_engine, ISC_ENTROPY_GOODONLY),
5428                    "initializing DST");
5429
5430         server->tkeyctx = NULL;
5431         CHECKFATAL(dns_tkeyctx_create(ns_g_mctx, ns_g_entropy,
5432                                       &server->tkeyctx),
5433                    "creating TKEY context");
5434
5435         /*
5436          * Setup the server task, which is responsible for coordinating
5437          * startup and shutdown of the server.
5438          */
5439         CHECKFATAL(isc_task_create(ns_g_taskmgr, 0, &server->task),
5440                    "creating server task");
5441         isc_task_setname(server->task, "server", server);
5442         CHECKFATAL(isc_task_onshutdown(server->task, shutdown_server, server),
5443                    "isc_task_onshutdown");
5444         CHECKFATAL(isc_app_onrun(ns_g_mctx, server->task, run_server, server),
5445                    "isc_app_onrun");
5446
5447         server->interface_timer = NULL;
5448         server->heartbeat_timer = NULL;
5449         server->pps_timer = NULL;
5450
5451         server->interface_interval = 0;
5452         server->heartbeat_interval = 0;
5453
5454         CHECKFATAL(dns_zonemgr_create(ns_g_mctx, ns_g_taskmgr, ns_g_timermgr,
5455                                       ns_g_socketmgr, &server->zonemgr),
5456                    "dns_zonemgr_create");
5457         CHECKFATAL(dns_zonemgr_setsize(server->zonemgr, 1000),
5458                    "dns_zonemgr_setsize");
5459
5460         server->statsfile = isc_mem_strdup(server->mctx, "named.stats");
5461         CHECKFATAL(server->statsfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
5462                    "isc_mem_strdup");
5463         server->nsstats = NULL;
5464         server->rcvquerystats = NULL;
5465         server->opcodestats = NULL;
5466         server->zonestats = NULL;
5467         server->resolverstats = NULL;
5468         server->sockstats = NULL;
5469         CHECKFATAL(isc_stats_create(server->mctx, &server->sockstats,
5470                                     isc_sockstatscounter_max),
5471                    "isc_stats_create");
5472         isc_socketmgr_setstats(ns_g_socketmgr, server->sockstats);
5473
5474         server->bindkeysfile = isc_mem_strdup(server->mctx, "bind.keys");
5475         CHECKFATAL(server->bindkeysfile == NULL ? ISC_R_NOMEMORY :
5476                                                   ISC_R_SUCCESS,
5477                    "isc_mem_strdup");
5478
5479         server->dumpfile = isc_mem_strdup(server->mctx, "named_dump.db");
5480         CHECKFATAL(server->dumpfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
5481                    "isc_mem_strdup");
5482
5483         server->secrootsfile = isc_mem_strdup(server->mctx, "named.secroots");
5484         CHECKFATAL(server->secrootsfile == NULL ? ISC_R_NOMEMORY :
5485                                                   ISC_R_SUCCESS,
5486                    "isc_mem_strdup");
5487
5488         server->recfile = isc_mem_strdup(server->mctx, "named.recursing");
5489         CHECKFATAL(server->recfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
5490                    "isc_mem_strdup");
5491
5492         server->hostname_set = ISC_FALSE;
5493         server->hostname = NULL;
5494         server->version_set = ISC_FALSE;
5495         server->version = NULL;
5496         server->server_usehostname = ISC_FALSE;
5497         server->server_id = NULL;
5498
5499         CHECKFATAL(isc_stats_create(ns_g_mctx, &server->nsstats,
5500                                     dns_nsstatscounter_max),
5501                    "dns_stats_create (server)");
5502
5503         CHECKFATAL(dns_rdatatypestats_create(ns_g_mctx,
5504                                              &server->rcvquerystats),
5505                    "dns_stats_create (rcvquery)");
5506
5507         CHECKFATAL(dns_opcodestats_create(ns_g_mctx, &server->opcodestats),
5508                    "dns_stats_create (opcode)");
5509
5510         CHECKFATAL(isc_stats_create(ns_g_mctx, &server->zonestats,
5511                                     dns_zonestatscounter_max),
5512                    "dns_stats_create (zone)");
5513
5514         CHECKFATAL(isc_stats_create(ns_g_mctx, &server->resolverstats,
5515                                     dns_resstatscounter_max),
5516                    "dns_stats_create (resolver)");
5517
5518         server->flushonshutdown = ISC_FALSE;
5519         server->log_queries = ISC_FALSE;
5520
5521         server->controls = NULL;
5522         CHECKFATAL(ns_controls_create(server, &server->controls),
5523                    "ns_controls_create");
5524         server->dispatchgen = 0;
5525         ISC_LIST_INIT(server->dispatches);
5526
5527         ISC_LIST_INIT(server->statschannels);
5528
5529         ISC_LIST_INIT(server->cachelist);
5530
5531         server->sessionkey = NULL;
5532         server->session_keyfile = NULL;
5533         server->session_keyname = NULL;
5534         server->session_keyalg = DST_ALG_UNKNOWN;
5535         server->session_keybits = 0;
5536
5537         server->magic = NS_SERVER_MAGIC;
5538         *serverp = server;
5539 }
5540
5541 void
5542 ns_server_destroy(ns_server_t **serverp) {
5543         ns_server_t *server = *serverp;
5544         REQUIRE(NS_SERVER_VALID(server));
5545
5546         ns_controls_destroy(&server->controls);
5547
5548         isc_stats_detach(&server->nsstats);
5549         dns_stats_detach(&server->rcvquerystats);
5550         dns_stats_detach(&server->opcodestats);
5551         isc_stats_detach(&server->zonestats);
5552         isc_stats_detach(&server->resolverstats);
5553         isc_stats_detach(&server->sockstats);
5554
5555         isc_mem_free(server->mctx, server->statsfile);
5556         isc_mem_free(server->mctx, server->bindkeysfile);
5557         isc_mem_free(server->mctx, server->dumpfile);
5558         isc_mem_free(server->mctx, server->secrootsfile);
5559         isc_mem_free(server->mctx, server->recfile);
5560
5561         if (server->version != NULL)
5562                 isc_mem_free(server->mctx, server->version);
5563         if (server->hostname != NULL)
5564                 isc_mem_free(server->mctx, server->hostname);
5565         if (server->server_id != NULL)
5566                 isc_mem_free(server->mctx, server->server_id);
5567
5568         if (server->zonemgr != NULL)
5569                 dns_zonemgr_detach(&server->zonemgr);
5570
5571         if (server->tkeyctx != NULL)
5572                 dns_tkeyctx_destroy(&server->tkeyctx);
5573
5574         dst_lib_destroy();
5575
5576         isc_event_free(&server->reload_event);
5577
5578         INSIST(ISC_LIST_EMPTY(server->viewlist));
5579         INSIST(ISC_LIST_EMPTY(server->cachelist));
5580
5581         dns_aclenv_destroy(&server->aclenv);
5582
5583         isc_quota_destroy(&server->recursionquota);
5584         isc_quota_destroy(&server->tcpquota);
5585         isc_quota_destroy(&server->xfroutquota);
5586
5587         server->magic = 0;
5588         isc_mem_put(server->mctx, server, sizeof(*server));
5589         *serverp = NULL;
5590 }
5591
5592 static void
5593 fatal(const char *msg, isc_result_t result) {
5594         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
5595                       ISC_LOG_CRITICAL, "%s: %s", msg,
5596                       isc_result_totext(result));
5597         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
5598                       ISC_LOG_CRITICAL, "exiting (due to fatal error)");
5599         exit(1);
5600 }
5601
5602 static void
5603 start_reserved_dispatches(ns_server_t *server) {
5604
5605         REQUIRE(NS_SERVER_VALID(server));
5606
5607         server->dispatchgen++;
5608 }
5609
5610 static void
5611 end_reserved_dispatches(ns_server_t *server, isc_boolean_t all) {
5612         ns_dispatch_t *dispatch, *nextdispatch;
5613
5614         REQUIRE(NS_SERVER_VALID(server));
5615
5616         for (dispatch = ISC_LIST_HEAD(server->dispatches);
5617              dispatch != NULL;
5618              dispatch = nextdispatch) {
5619                 nextdispatch = ISC_LIST_NEXT(dispatch, link);
5620                 if (!all && server->dispatchgen == dispatch-> dispatchgen)
5621                         continue;
5622                 ISC_LIST_UNLINK(server->dispatches, dispatch, link);
5623                 dns_dispatch_detach(&dispatch->dispatch);
5624                 isc_mem_put(server->mctx, dispatch, sizeof(*dispatch));
5625         }
5626 }
5627
5628 void
5629 ns_add_reserved_dispatch(ns_server_t *server, const isc_sockaddr_t *addr) {
5630         ns_dispatch_t *dispatch;
5631         in_port_t port;
5632         char addrbuf[ISC_SOCKADDR_FORMATSIZE];
5633         isc_result_t result;
5634         unsigned int attrs, attrmask;
5635
5636         REQUIRE(NS_SERVER_VALID(server));
5637
5638         port = isc_sockaddr_getport(addr);
5639         if (port == 0 || port >= 1024)
5640                 return;
5641
5642         for (dispatch = ISC_LIST_HEAD(server->dispatches);
5643              dispatch != NULL;
5644              dispatch = ISC_LIST_NEXT(dispatch, link)) {
5645                 if (isc_sockaddr_equal(&dispatch->addr, addr))
5646                         break;
5647         }
5648         if (dispatch != NULL) {
5649                 dispatch->dispatchgen = server->dispatchgen;
5650                 return;
5651         }
5652
5653         dispatch = isc_mem_get(server->mctx, sizeof(*dispatch));
5654         if (dispatch == NULL) {
5655                 result = ISC_R_NOMEMORY;
5656                 goto cleanup;
5657         }
5658
5659         dispatch->addr = *addr;
5660         dispatch->dispatchgen = server->dispatchgen;
5661         dispatch->dispatch = NULL;
5662
5663         attrs = 0;
5664         attrs |= DNS_DISPATCHATTR_UDP;
5665         switch (isc_sockaddr_pf(addr)) {
5666         case AF_INET:
5667                 attrs |= DNS_DISPATCHATTR_IPV4;
5668                 break;
5669         case AF_INET6:
5670                 attrs |= DNS_DISPATCHATTR_IPV6;
5671                 break;
5672         default:
5673                 result = ISC_R_NOTIMPLEMENTED;
5674                 goto cleanup;
5675         }
5676         attrmask = 0;
5677         attrmask |= DNS_DISPATCHATTR_UDP;
5678         attrmask |= DNS_DISPATCHATTR_TCP;
5679         attrmask |= DNS_DISPATCHATTR_IPV4;
5680         attrmask |= DNS_DISPATCHATTR_IPV6;
5681
5682         result = dns_dispatch_getudp(ns_g_dispatchmgr, ns_g_socketmgr,
5683                                      ns_g_taskmgr, &dispatch->addr, 4096,
5684                                      1000, 32768, 16411, 16433,
5685                                      attrs, attrmask, &dispatch->dispatch);
5686         if (result != ISC_R_SUCCESS)
5687                 goto cleanup;
5688
5689         ISC_LIST_INITANDPREPEND(server->dispatches, dispatch, link);
5690
5691         return;
5692
5693  cleanup:
5694         if (dispatch != NULL)
5695                 isc_mem_put(server->mctx, dispatch, sizeof(*dispatch));
5696         isc_sockaddr_format(addr, addrbuf, sizeof(addrbuf));
5697         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5698                       NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
5699                       "unable to create dispatch for reserved port %s: %s",
5700                       addrbuf, isc_result_totext(result));
5701 }
5702
5703
5704 static isc_result_t
5705 loadconfig(ns_server_t *server) {
5706         isc_result_t result;
5707         start_reserved_dispatches(server);
5708         result = load_configuration(ns_g_lwresdonly ?
5709                                     lwresd_g_conffile : ns_g_conffile,
5710                                     server, ISC_FALSE);
5711         if (result == ISC_R_SUCCESS) {
5712                 end_reserved_dispatches(server, ISC_FALSE);
5713                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5714                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
5715                               "reloading configuration succeeded");
5716         } else {
5717                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5718                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
5719                               "reloading configuration failed: %s",
5720                               isc_result_totext(result));
5721         }
5722         return (result);
5723 }
5724
5725 static isc_result_t
5726 reload(ns_server_t *server) {
5727         isc_result_t result;
5728         CHECK(loadconfig(server));
5729
5730         result = load_zones(server, ISC_FALSE);
5731         if (result == ISC_R_SUCCESS)
5732                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5733                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
5734                               "reloading zones succeeded");
5735         else
5736                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5737                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
5738                               "reloading zones failed: %s",
5739                               isc_result_totext(result));
5740
5741  cleanup:
5742         return (result);
5743 }
5744
5745 static void
5746 reconfig(ns_server_t *server) {
5747         isc_result_t result;
5748         CHECK(loadconfig(server));
5749
5750         result = load_new_zones(server, ISC_FALSE);
5751         if (result == ISC_R_SUCCESS)
5752                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5753                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
5754                               "any newly configured zones are now loaded");
5755         else
5756                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5757                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
5758                               "loading new zones failed: %s",
5759                               isc_result_totext(result));
5760
5761  cleanup: ;
5762 }
5763
5764 /*
5765  * Handle a reload event (from SIGHUP).
5766  */
5767 static void
5768 ns_server_reload(isc_task_t *task, isc_event_t *event) {
5769         ns_server_t *server = (ns_server_t *)event->ev_arg;
5770
5771         INSIST(task = server->task);
5772         UNUSED(task);
5773
5774         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5775                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
5776                       "received SIGHUP signal to reload zones");
5777         (void)reload(server);
5778
5779         LOCK(&server->reload_event_lock);
5780         INSIST(server->reload_event == NULL);
5781         server->reload_event = event;
5782         UNLOCK(&server->reload_event_lock);
5783 }
5784
5785 void
5786 ns_server_reloadwanted(ns_server_t *server) {
5787         LOCK(&server->reload_event_lock);
5788         if (server->reload_event != NULL)
5789                 isc_task_send(server->task, &server->reload_event);
5790         UNLOCK(&server->reload_event_lock);
5791 }
5792
5793 static char *
5794 next_token(char **stringp, const char *delim) {
5795         char *res;
5796
5797         do {
5798                 res = strsep(stringp, delim);
5799                 if (res == NULL)
5800                         break;
5801         } while (*res == '\0');
5802         return (res);
5803 }
5804
5805 /*
5806  * Find the zone specified in the control channel command 'args',
5807  * if any.  If a zone is specified, point '*zonep' at it, otherwise
5808  * set '*zonep' to NULL.
5809  */
5810 static isc_result_t
5811 zone_from_args(ns_server_t *server, char *args, dns_zone_t **zonep,
5812                const char **zonename)
5813 {
5814         char *input, *ptr;
5815         const char *zonetxt;
5816         char *classtxt;
5817         const char *viewtxt = NULL;
5818         dns_fixedname_t name;
5819         isc_result_t result;
5820         isc_buffer_t buf;
5821         dns_view_t *view = NULL;
5822         dns_rdataclass_t rdclass;
5823
5824         REQUIRE(zonep != NULL && *zonep == NULL);
5825
5826         input = args;
5827
5828         /* Skip the command name. */
5829         ptr = next_token(&input, " \t");
5830         if (ptr == NULL)
5831                 return (ISC_R_UNEXPECTEDEND);
5832
5833         /* Look for the zone name. */
5834         zonetxt = next_token(&input, " \t");
5835         if (zonetxt == NULL)
5836                 return (ISC_R_SUCCESS);
5837         if (zonename)
5838                 *zonename = zonetxt;
5839
5840         /* Look for the optional class name. */
5841         classtxt = next_token(&input, " \t");
5842         if (classtxt != NULL) {
5843                 /* Look for the optional view name. */
5844                 viewtxt = next_token(&input, " \t");
5845         }
5846
5847         isc_buffer_init(&buf, zonetxt, strlen(zonetxt));
5848         isc_buffer_add(&buf, strlen(zonetxt));
5849         dns_fixedname_init(&name);
5850         result = dns_name_fromtext(dns_fixedname_name(&name),
5851                                    &buf, dns_rootname, 0, NULL);
5852         if (result != ISC_R_SUCCESS)
5853                 goto fail1;
5854
5855         if (classtxt != NULL) {
5856                 isc_textregion_t r;
5857                 r.base = classtxt;
5858                 r.length = strlen(classtxt);
5859                 result = dns_rdataclass_fromtext(&rdclass, &r);
5860                 if (result != ISC_R_SUCCESS)
5861                         goto fail1;
5862         } else
5863                 rdclass = dns_rdataclass_in;
5864
5865         if (viewtxt == NULL) {
5866                 result = dns_viewlist_findzone(&server->viewlist,
5867                                                dns_fixedname_name(&name),
5868                                                ISC_TF(classtxt == NULL),
5869                                                rdclass, zonep);
5870         } else {
5871                 result = dns_viewlist_find(&server->viewlist, viewtxt,
5872                                            rdclass, &view);
5873                 if (result != ISC_R_SUCCESS)
5874                         goto fail1;
5875
5876                 result = dns_zt_find(view->zonetable, dns_fixedname_name(&name),
5877                                      0, NULL, zonep);
5878                 dns_view_detach(&view);
5879         }
5880
5881         /* Partial match? */
5882         if (result != ISC_R_SUCCESS && *zonep != NULL)
5883                 dns_zone_detach(zonep);
5884         if (result == DNS_R_PARTIALMATCH)
5885                 result = ISC_R_NOTFOUND;
5886  fail1:
5887         return (result);
5888 }
5889
5890 /*
5891  * Act on a "retransfer" command from the command channel.
5892  */
5893 isc_result_t
5894 ns_server_retransfercommand(ns_server_t *server, char *args) {
5895         isc_result_t result;
5896         dns_zone_t *zone = NULL;
5897         dns_zonetype_t type;
5898
5899         result = zone_from_args(server, args, &zone, NULL);
5900         if (result != ISC_R_SUCCESS)
5901                 return (result);
5902         if (zone == NULL)
5903                 return (ISC_R_UNEXPECTEDEND);
5904         type = dns_zone_gettype(zone);
5905         if (type == dns_zone_slave || type == dns_zone_stub)
5906                 dns_zone_forcereload(zone);
5907         else
5908                 result = ISC_R_NOTFOUND;
5909         dns_zone_detach(&zone);
5910         return (result);
5911 }
5912
5913 /*
5914  * Act on a "reload" command from the command channel.
5915  */
5916 isc_result_t
5917 ns_server_reloadcommand(ns_server_t *server, char *args, isc_buffer_t *text) {
5918         isc_result_t result;
5919         dns_zone_t *zone = NULL;
5920         dns_zonetype_t type;
5921         const char *msg = NULL;
5922
5923         result = zone_from_args(server, args, &zone, NULL);
5924         if (result != ISC_R_SUCCESS)
5925                 return (result);
5926         if (zone == NULL) {
5927                 result = reload(server);
5928                 if (result == ISC_R_SUCCESS)
5929                         msg = "server reload successful";
5930         } else {
5931                 type = dns_zone_gettype(zone);
5932                 if (type == dns_zone_slave || type == dns_zone_stub) {
5933                         dns_zone_refresh(zone);
5934                         dns_zone_detach(&zone);
5935                         msg = "zone refresh queued";
5936                 } else {
5937                         result = dns_zone_load(zone);
5938                         dns_zone_detach(&zone);
5939                         switch (result) {
5940                         case ISC_R_SUCCESS:
5941                                  msg = "zone reload successful";
5942                                  break;
5943                         case DNS_R_CONTINUE:
5944                                 msg = "zone reload queued";
5945                                 result = ISC_R_SUCCESS;
5946                                 break;
5947                         case DNS_R_UPTODATE:
5948                                 msg = "zone reload up-to-date";
5949                                 result = ISC_R_SUCCESS;
5950                                 break;
5951                         default:
5952                                 /* failure message will be generated by rndc */
5953                                 break;
5954                         }
5955                 }
5956         }
5957         if (msg != NULL && strlen(msg) < isc_buffer_availablelength(text))
5958                 isc_buffer_putmem(text, (const unsigned char *)msg,
5959                                   strlen(msg) + 1);
5960         return (result);
5961 }
5962
5963 /*
5964  * Act on a "reconfig" command from the command channel.
5965  */
5966 isc_result_t
5967 ns_server_reconfigcommand(ns_server_t *server, char *args) {
5968         UNUSED(args);
5969
5970         reconfig(server);
5971         return (ISC_R_SUCCESS);
5972 }
5973
5974 /*
5975  * Act on a "notify" command from the command channel.
5976  */
5977 isc_result_t
5978 ns_server_notifycommand(ns_server_t *server, char *args, isc_buffer_t *text) {
5979         isc_result_t result;
5980         dns_zone_t *zone = NULL;
5981         const unsigned char msg[] = "zone notify queued";
5982
5983         result = zone_from_args(server, args, &zone, NULL);
5984         if (result != ISC_R_SUCCESS)
5985                 return (result);
5986         if (zone == NULL)
5987                 return (ISC_R_UNEXPECTEDEND);
5988
5989         dns_zone_notify(zone);
5990         dns_zone_detach(&zone);
5991         if (sizeof(msg) <= isc_buffer_availablelength(text))
5992                 isc_buffer_putmem(text, msg, sizeof(msg));
5993
5994         return (ISC_R_SUCCESS);
5995 }
5996
5997 /*
5998  * Act on a "refresh" command from the command channel.
5999  */
6000 isc_result_t
6001 ns_server_refreshcommand(ns_server_t *server, char *args, isc_buffer_t *text) {
6002         isc_result_t result;
6003         dns_zone_t *zone = NULL;
6004         const unsigned char msg1[] = "zone refresh queued";
6005         const unsigned char msg2[] = "not a slave or stub zone";
6006         dns_zonetype_t type;
6007
6008         result = zone_from_args(server, args, &zone, NULL);
6009         if (result != ISC_R_SUCCESS)
6010                 return (result);
6011         if (zone == NULL)
6012                 return (ISC_R_UNEXPECTEDEND);
6013
6014         type = dns_zone_gettype(zone);
6015         if (type == dns_zone_slave || type == dns_zone_stub) {
6016                 dns_zone_refresh(zone);
6017                 dns_zone_detach(&zone);
6018                 if (sizeof(msg1) <= isc_buffer_availablelength(text))
6019                         isc_buffer_putmem(text, msg1, sizeof(msg1));
6020                 return (ISC_R_SUCCESS);
6021         }
6022
6023         dns_zone_detach(&zone);
6024         if (sizeof(msg2) <= isc_buffer_availablelength(text))
6025                 isc_buffer_putmem(text, msg2, sizeof(msg2));
6026         return (ISC_R_FAILURE);
6027 }
6028
6029 isc_result_t
6030 ns_server_togglequerylog(ns_server_t *server) {
6031         server->log_queries = server->log_queries ? ISC_FALSE : ISC_TRUE;
6032
6033         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6034                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6035                       "query logging is now %s",
6036                       server->log_queries ? "on" : "off");
6037         return (ISC_R_SUCCESS);
6038 }
6039
6040 static isc_result_t
6041 ns_listenlist_fromconfig(const cfg_obj_t *listenlist, const cfg_obj_t *config,
6042                          cfg_aclconfctx_t *actx,
6043                          isc_mem_t *mctx, ns_listenlist_t **target)
6044 {
6045         isc_result_t result;
6046         const cfg_listelt_t *element;
6047         ns_listenlist_t *dlist = NULL;
6048
6049         REQUIRE(target != NULL && *target == NULL);
6050
6051         result = ns_listenlist_create(mctx, &dlist);
6052         if (result != ISC_R_SUCCESS)
6053                 return (result);
6054
6055         for (element = cfg_list_first(listenlist);
6056              element != NULL;
6057              element = cfg_list_next(element))
6058         {
6059                 ns_listenelt_t *delt = NULL;
6060                 const cfg_obj_t *listener = cfg_listelt_value(element);
6061                 result = ns_listenelt_fromconfig(listener, config, actx,
6062                                                  mctx, &delt);
6063                 if (result != ISC_R_SUCCESS)
6064                         goto cleanup;
6065                 ISC_LIST_APPEND(dlist->elts, delt, link);
6066         }
6067         *target = dlist;
6068         return (ISC_R_SUCCESS);
6069
6070  cleanup:
6071         ns_listenlist_detach(&dlist);
6072         return (result);
6073 }
6074
6075 /*
6076  * Create a listen list from the corresponding configuration
6077  * data structure.
6078  */
6079 static isc_result_t
6080 ns_listenelt_fromconfig(const cfg_obj_t *listener, const cfg_obj_t *config,
6081                         cfg_aclconfctx_t *actx,
6082                         isc_mem_t *mctx, ns_listenelt_t **target)
6083 {
6084         isc_result_t result;
6085         const cfg_obj_t *portobj;
6086         in_port_t port;
6087         ns_listenelt_t *delt = NULL;
6088         REQUIRE(target != NULL && *target == NULL);
6089
6090         portobj = cfg_tuple_get(listener, "port");
6091         if (!cfg_obj_isuint32(portobj)) {
6092                 if (ns_g_port != 0) {
6093                         port = ns_g_port;
6094                 } else {
6095                         result = ns_config_getport(config, &port);
6096                         if (result != ISC_R_SUCCESS)
6097                                 return (result);
6098                 }
6099         } else {
6100                 if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
6101                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
6102                                     "port value '%u' is out of range",
6103                                     cfg_obj_asuint32(portobj));
6104                         return (ISC_R_RANGE);
6105                 }
6106                 port = (in_port_t)cfg_obj_asuint32(portobj);
6107         }
6108
6109         result = ns_listenelt_create(mctx, port, NULL, &delt);
6110         if (result != ISC_R_SUCCESS)
6111                 return (result);
6112
6113         result = cfg_acl_fromconfig(cfg_tuple_get(listener, "acl"),
6114                                    config, ns_g_lctx, actx, mctx, 0,
6115                                    &delt->acl);
6116         if (result != ISC_R_SUCCESS) {
6117                 ns_listenelt_destroy(delt);
6118                 return (result);
6119         }
6120         *target = delt;
6121         return (ISC_R_SUCCESS);
6122 }
6123
6124 isc_result_t
6125 ns_server_dumpstats(ns_server_t *server) {
6126         isc_result_t result;
6127         FILE *fp = NULL;
6128
6129         CHECKMF(isc_stdio_open(server->statsfile, "a", &fp),
6130                 "could not open statistics dump file", server->statsfile);
6131
6132         result = ns_stats_dump(server, fp);
6133
6134  cleanup:
6135         if (fp != NULL)
6136                 (void)isc_stdio_close(fp);
6137         if (result == ISC_R_SUCCESS)
6138                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6139                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6140                               "dumpstats complete");
6141         else
6142                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6143                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6144                               "dumpstats failed: %s",
6145                               dns_result_totext(result));
6146         return (result);
6147 }
6148
6149 static isc_result_t
6150 add_zone_tolist(dns_zone_t *zone, void *uap) {
6151         struct dumpcontext *dctx = uap;
6152         struct zonelistentry *zle;
6153
6154         zle = isc_mem_get(dctx->mctx, sizeof *zle);
6155         if (zle ==  NULL)
6156                 return (ISC_R_NOMEMORY);
6157         zle->zone = NULL;
6158         dns_zone_attach(zone, &zle->zone);
6159         ISC_LINK_INIT(zle, link);
6160         ISC_LIST_APPEND(ISC_LIST_TAIL(dctx->viewlist)->zonelist, zle, link);
6161         return (ISC_R_SUCCESS);
6162 }
6163
6164 static isc_result_t
6165 add_view_tolist(struct dumpcontext *dctx, dns_view_t *view) {
6166         struct viewlistentry *vle;
6167         isc_result_t result = ISC_R_SUCCESS;
6168
6169         /*
6170          * Prevent duplicate views.
6171          */
6172         for (vle = ISC_LIST_HEAD(dctx->viewlist);
6173              vle != NULL;
6174              vle = ISC_LIST_NEXT(vle, link))
6175                 if (vle->view == view)
6176                         return (ISC_R_SUCCESS);
6177
6178         vle = isc_mem_get(dctx->mctx, sizeof *vle);
6179         if (vle == NULL)
6180                 return (ISC_R_NOMEMORY);
6181         vle->view = NULL;
6182         dns_view_attach(view, &vle->view);
6183         ISC_LINK_INIT(vle, link);
6184         ISC_LIST_INIT(vle->zonelist);
6185         ISC_LIST_APPEND(dctx->viewlist, vle, link);
6186         if (dctx->dumpzones)
6187                 result = dns_zt_apply(view->zonetable, ISC_TRUE,
6188                                       add_zone_tolist, dctx);
6189         return (result);
6190 }
6191
6192 static void
6193 dumpcontext_destroy(struct dumpcontext *dctx) {
6194         struct viewlistentry *vle;
6195         struct zonelistentry *zle;
6196
6197         vle = ISC_LIST_HEAD(dctx->viewlist);
6198         while (vle != NULL) {
6199                 ISC_LIST_UNLINK(dctx->viewlist, vle, link);
6200                 zle = ISC_LIST_HEAD(vle->zonelist);
6201                 while (zle != NULL) {
6202                         ISC_LIST_UNLINK(vle->zonelist, zle, link);
6203                         dns_zone_detach(&zle->zone);
6204                         isc_mem_put(dctx->mctx, zle, sizeof *zle);
6205                         zle = ISC_LIST_HEAD(vle->zonelist);
6206                 }
6207                 dns_view_detach(&vle->view);
6208                 isc_mem_put(dctx->mctx, vle, sizeof *vle);
6209                 vle = ISC_LIST_HEAD(dctx->viewlist);
6210         }
6211         if (dctx->version != NULL)
6212                 dns_db_closeversion(dctx->db, &dctx->version, ISC_FALSE);
6213         if (dctx->db != NULL)
6214                 dns_db_detach(&dctx->db);
6215         if (dctx->cache != NULL)
6216                 dns_db_detach(&dctx->cache);
6217         if (dctx->task != NULL)
6218                 isc_task_detach(&dctx->task);
6219         if (dctx->fp != NULL)
6220                 (void)isc_stdio_close(dctx->fp);
6221         if (dctx->mdctx != NULL)
6222                 dns_dumpctx_detach(&dctx->mdctx);
6223         isc_mem_put(dctx->mctx, dctx, sizeof *dctx);
6224 }
6225
6226 static void
6227 dumpdone(void *arg, isc_result_t result) {
6228         struct dumpcontext *dctx = arg;
6229         char buf[1024+32];
6230         const dns_master_style_t *style;
6231
6232         if (result != ISC_R_SUCCESS)
6233                 goto cleanup;
6234         if (dctx->mdctx != NULL)
6235                 dns_dumpctx_detach(&dctx->mdctx);
6236         if (dctx->view == NULL) {
6237                 dctx->view = ISC_LIST_HEAD(dctx->viewlist);
6238                 if (dctx->view == NULL)
6239                         goto done;
6240                 INSIST(dctx->zone == NULL);
6241         } else
6242                 goto resume;
6243  nextview:
6244         fprintf(dctx->fp, ";\n; Start view %s\n;\n", dctx->view->view->name);
6245  resume:
6246         if (dctx->dumpcache && dns_view_iscacheshared(dctx->view->view)) {
6247                 fprintf(dctx->fp,
6248                         ";\n; Cache of view '%s' is shared as '%s'\n",
6249                         dctx->view->view->name,
6250                         dns_cache_getname(dctx->view->view->cache));
6251         } else if (dctx->zone == NULL && dctx->cache == NULL &&
6252                    dctx->dumpcache)
6253         {
6254                 style = &dns_master_style_cache;
6255                 /* start cache dump */
6256                 if (dctx->view->view->cachedb != NULL)
6257                         dns_db_attach(dctx->view->view->cachedb, &dctx->cache);
6258                 if (dctx->cache != NULL) {
6259                         fprintf(dctx->fp,
6260                                 ";\n; Cache dump of view '%s' (cache %s)\n;\n",
6261                                 dctx->view->view->name,
6262                                 dns_cache_getname(dctx->view->view->cache));
6263                         result = dns_master_dumptostreaminc(dctx->mctx,
6264                                                             dctx->cache, NULL,
6265                                                             style, dctx->fp,
6266                                                             dctx->task,
6267                                                             dumpdone, dctx,
6268                                                             &dctx->mdctx);
6269                         if (result == DNS_R_CONTINUE)
6270                                 return;
6271                         if (result == ISC_R_NOTIMPLEMENTED)
6272                                 fprintf(dctx->fp, "; %s\n",
6273                                         dns_result_totext(result));
6274                         else if (result != ISC_R_SUCCESS)
6275                                 goto cleanup;
6276                 }
6277         }
6278         if (dctx->cache != NULL) {
6279                 dns_adb_dump(dctx->view->view->adb, dctx->fp);
6280                 dns_resolver_printbadcache(dctx->view->view->resolver,
6281                                            dctx->fp);
6282                 dns_db_detach(&dctx->cache);
6283         }
6284         if (dctx->dumpzones) {
6285                 style = &dns_master_style_full;
6286  nextzone:
6287                 if (dctx->version != NULL)
6288                         dns_db_closeversion(dctx->db, &dctx->version,
6289                                             ISC_FALSE);
6290                 if (dctx->db != NULL)
6291                         dns_db_detach(&dctx->db);
6292                 if (dctx->zone == NULL)
6293                         dctx->zone = ISC_LIST_HEAD(dctx->view->zonelist);
6294                 else
6295                         dctx->zone = ISC_LIST_NEXT(dctx->zone, link);
6296                 if (dctx->zone != NULL) {
6297                         /* start zone dump */
6298                         dns_zone_name(dctx->zone->zone, buf, sizeof(buf));
6299                         fprintf(dctx->fp, ";\n; Zone dump of '%s'\n;\n", buf);
6300                         result = dns_zone_getdb(dctx->zone->zone, &dctx->db);
6301                         if (result != ISC_R_SUCCESS) {
6302                                 fprintf(dctx->fp, "; %s\n",
6303                                         dns_result_totext(result));
6304                                 goto nextzone;
6305                         }
6306                         dns_db_currentversion(dctx->db, &dctx->version);
6307                         result = dns_master_dumptostreaminc(dctx->mctx,
6308                                                             dctx->db,
6309                                                             dctx->version,
6310                                                             style, dctx->fp,
6311                                                             dctx->task,
6312                                                             dumpdone, dctx,
6313                                                             &dctx->mdctx);
6314                         if (result == DNS_R_CONTINUE)
6315                                 return;
6316                         if (result == ISC_R_NOTIMPLEMENTED) {
6317                                 fprintf(dctx->fp, "; %s\n",
6318                                         dns_result_totext(result));
6319                                 result = ISC_R_SUCCESS;
6320                                 POST(result);
6321                                 goto nextzone;
6322                         }
6323                         if (result != ISC_R_SUCCESS)
6324                                 goto cleanup;
6325                 }
6326         }
6327         if (dctx->view != NULL)
6328                 dctx->view = ISC_LIST_NEXT(dctx->view, link);
6329         if (dctx->view != NULL)
6330                 goto nextview;
6331  done:
6332         fprintf(dctx->fp, "; Dump complete\n");
6333         result = isc_stdio_flush(dctx->fp);
6334         if (result == ISC_R_SUCCESS)
6335                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6336                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6337                               "dumpdb complete");
6338  cleanup:
6339         if (result != ISC_R_SUCCESS)
6340                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6341                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6342                               "dumpdb failed: %s", dns_result_totext(result));
6343         dumpcontext_destroy(dctx);
6344 }
6345
6346 isc_result_t
6347 ns_server_dumpdb(ns_server_t *server, char *args) {
6348         struct dumpcontext *dctx = NULL;
6349         dns_view_t *view;
6350         isc_result_t result;
6351         char *ptr;
6352         const char *sep;
6353
6354         /* Skip the command name. */
6355         ptr = next_token(&args, " \t");
6356         if (ptr == NULL)
6357                 return (ISC_R_UNEXPECTEDEND);
6358
6359         dctx = isc_mem_get(server->mctx, sizeof(*dctx));
6360         if (dctx == NULL)
6361                 return (ISC_R_NOMEMORY);
6362
6363         dctx->mctx = server->mctx;
6364         dctx->dumpcache = ISC_TRUE;
6365         dctx->dumpzones = ISC_FALSE;
6366         dctx->fp = NULL;
6367         ISC_LIST_INIT(dctx->viewlist);
6368         dctx->view = NULL;
6369         dctx->zone = NULL;
6370         dctx->cache = NULL;
6371         dctx->mdctx = NULL;
6372         dctx->db = NULL;
6373         dctx->cache = NULL;
6374         dctx->task = NULL;
6375         dctx->version = NULL;
6376         isc_task_attach(server->task, &dctx->task);
6377
6378         CHECKMF(isc_stdio_open(server->dumpfile, "w", &dctx->fp),
6379                 "could not open dump file", server->dumpfile);
6380
6381         sep = (args == NULL) ? "" : ": ";
6382         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6383                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6384                       "dumpdb started%s%s", sep, (args != NULL) ? args : "");
6385
6386         ptr = next_token(&args, " \t");
6387         if (ptr != NULL && strcmp(ptr, "-all") == 0) {
6388                 dctx->dumpzones = ISC_TRUE;
6389                 dctx->dumpcache = ISC_TRUE;
6390                 ptr = next_token(&args, " \t");
6391         } else if (ptr != NULL && strcmp(ptr, "-cache") == 0) {
6392                 dctx->dumpzones = ISC_FALSE;
6393                 dctx->dumpcache = ISC_TRUE;
6394                 ptr = next_token(&args, " \t");
6395         } else if (ptr != NULL && strcmp(ptr, "-zones") == 0) {
6396                 dctx->dumpzones = ISC_TRUE;
6397                 dctx->dumpcache = ISC_FALSE;
6398                 ptr = next_token(&args, " \t");
6399         }
6400
6401  nextview:
6402         for (view = ISC_LIST_HEAD(server->viewlist);
6403              view != NULL;
6404              view = ISC_LIST_NEXT(view, link))
6405         {
6406                 if (ptr != NULL && strcmp(view->name, ptr) != 0)
6407                         continue;
6408                 CHECK(add_view_tolist(dctx, view));
6409         }
6410         if (ptr != NULL) {
6411                 ptr = next_token(&args, " \t");
6412                 if (ptr != NULL)
6413                         goto nextview;
6414         }
6415         dumpdone(dctx, ISC_R_SUCCESS);
6416         return (ISC_R_SUCCESS);
6417
6418  cleanup:
6419         if (dctx != NULL)
6420                 dumpcontext_destroy(dctx);
6421         return (result);
6422 }
6423
6424 isc_result_t
6425 ns_server_dumpsecroots(ns_server_t *server, char *args) {
6426         dns_view_t *view;
6427         dns_keytable_t *secroots = NULL;
6428         isc_result_t result;
6429         char *ptr;
6430         FILE *fp = NULL;
6431         isc_time_t now;
6432         char tbuf[64];
6433
6434         /* Skip the command name. */
6435         ptr = next_token(&args, " \t");
6436         if (ptr == NULL)
6437                 return (ISC_R_UNEXPECTEDEND);
6438         ptr = next_token(&args, " \t");
6439
6440         CHECKMF(isc_stdio_open(server->secrootsfile, "w", &fp),
6441                 "could not open secroots dump file", server->secrootsfile);
6442         TIME_NOW(&now);
6443         isc_time_formattimestamp(&now, tbuf, sizeof(tbuf));
6444         fprintf(fp, "%s\n", tbuf);
6445
6446         do {
6447                 for (view = ISC_LIST_HEAD(server->viewlist);
6448                      view != NULL;
6449                      view = ISC_LIST_NEXT(view, link))
6450                 {
6451                         if (ptr != NULL && strcmp(view->name, ptr) != 0)
6452                                 continue;
6453                         if (secroots != NULL)
6454                                 dns_keytable_detach(&secroots);
6455                         result = dns_view_getsecroots(view, &secroots);
6456                         if (result == ISC_R_NOTFOUND) {
6457                                 result = ISC_R_SUCCESS;
6458                                 continue;
6459                         }
6460                         fprintf(fp, "\n Start view %s\n\n", view->name);
6461                         result = dns_keytable_dump(secroots, fp);
6462                         if (result != ISC_R_SUCCESS)
6463                                 fprintf(fp, " dumpsecroots failed: %s\n",
6464                                         isc_result_totext(result));
6465                 }
6466                 if (ptr != NULL)
6467                         ptr = next_token(&args, " \t");
6468         } while (ptr != NULL);
6469
6470  cleanup:
6471         if (secroots != NULL)
6472                 dns_keytable_detach(&secroots);
6473         if (fp != NULL)
6474                 (void)isc_stdio_close(fp);
6475         if (result == ISC_R_SUCCESS)
6476                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6477                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6478                               "dumpsecroots complete");
6479         else
6480                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6481                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6482                               "dumpsecroots failed: %s",
6483                               dns_result_totext(result));
6484         return (result);
6485 }
6486
6487 isc_result_t
6488 ns_server_dumprecursing(ns_server_t *server) {
6489         FILE *fp = NULL;
6490         isc_result_t result;
6491
6492         CHECKMF(isc_stdio_open(server->recfile, "w", &fp),
6493                 "could not open dump file", server->recfile);
6494         fprintf(fp,";\n; Recursing Queries\n;\n");
6495         ns_interfacemgr_dumprecursing(fp, server->interfacemgr);
6496         fprintf(fp, "; Dump complete\n");
6497
6498  cleanup:
6499         if (fp != NULL)
6500                 result = isc_stdio_close(fp);
6501         if (result == ISC_R_SUCCESS)
6502                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6503                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6504                               "dumprecursing complete");
6505         else
6506                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6507                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6508                               "dumprecursing failed: %s",
6509                               dns_result_totext(result));
6510         return (result);
6511 }
6512
6513 isc_result_t
6514 ns_server_setdebuglevel(ns_server_t *server, char *args) {
6515         char *ptr;
6516         char *levelstr;
6517         char *endp;
6518         long newlevel;
6519
6520         UNUSED(server);
6521
6522         /* Skip the command name. */
6523         ptr = next_token(&args, " \t");
6524         if (ptr == NULL)
6525                 return (ISC_R_UNEXPECTEDEND);
6526
6527         /* Look for the new level name. */
6528         levelstr = next_token(&args, " \t");
6529         if (levelstr == NULL) {
6530                 if (ns_g_debuglevel < 99)
6531                         ns_g_debuglevel++;
6532         } else {
6533                 newlevel = strtol(levelstr, &endp, 10);
6534                 if (*endp != '\0' || newlevel < 0 || newlevel > 99)
6535                         return (ISC_R_RANGE);
6536                 ns_g_debuglevel = (unsigned int)newlevel;
6537         }
6538         isc_log_setdebuglevel(ns_g_lctx, ns_g_debuglevel);
6539         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6540                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6541                       "debug level is now %d", ns_g_debuglevel);
6542         return (ISC_R_SUCCESS);
6543 }
6544
6545 isc_result_t
6546 ns_server_validation(ns_server_t *server, char *args) {
6547         char *ptr, *viewname;
6548         dns_view_t *view;
6549         isc_boolean_t changed = ISC_FALSE;
6550         isc_result_t result;
6551         isc_boolean_t enable;
6552
6553         /* Skip the command name. */
6554         ptr = next_token(&args, " \t");
6555         if (ptr == NULL)
6556                 return (ISC_R_UNEXPECTEDEND);
6557
6558         /* Find out what we are to do. */
6559         ptr = next_token(&args, " \t");
6560         if (ptr == NULL)
6561                 return (ISC_R_UNEXPECTEDEND);
6562
6563         if (!strcasecmp(ptr, "on") || !strcasecmp(ptr, "yes") ||
6564             !strcasecmp(ptr, "enable") || !strcasecmp(ptr, "true"))
6565                 enable = ISC_TRUE;
6566         else if (!strcasecmp(ptr, "off") || !strcasecmp(ptr, "no") ||
6567                  !strcasecmp(ptr, "disable") || !strcasecmp(ptr, "false"))
6568                 enable = ISC_FALSE;
6569         else
6570                 return (DNS_R_SYNTAX);
6571
6572         /* Look for the view name. */
6573         viewname = next_token(&args, " \t");
6574
6575         result = isc_task_beginexclusive(server->task);
6576         RUNTIME_CHECK(result == ISC_R_SUCCESS);
6577         for (view = ISC_LIST_HEAD(server->viewlist);
6578              view != NULL;
6579              view = ISC_LIST_NEXT(view, link))
6580         {
6581                 if (viewname != NULL && strcasecmp(viewname, view->name) != 0)
6582                         continue;
6583                 result = dns_view_flushcache(view);
6584                 if (result != ISC_R_SUCCESS)
6585                         goto out;
6586                 view->enablevalidation = enable;
6587                 changed = ISC_TRUE;
6588         }
6589         if (changed)
6590                 result = ISC_R_SUCCESS;
6591         else
6592                 result = ISC_R_FAILURE;
6593  out:
6594         isc_task_endexclusive(server->task);
6595         return (result);
6596 }
6597
6598 isc_result_t
6599 ns_server_flushcache(ns_server_t *server, char *args) {
6600         char *ptr, *viewname;
6601         dns_view_t *view;
6602         isc_boolean_t flushed;
6603         isc_boolean_t found;
6604         isc_result_t result;
6605         ns_cache_t *nsc;
6606
6607         /* Skip the command name. */
6608         ptr = next_token(&args, " \t");
6609         if (ptr == NULL)
6610                 return (ISC_R_UNEXPECTEDEND);
6611
6612         /* Look for the view name. */
6613         viewname = next_token(&args, " \t");
6614
6615         result = isc_task_beginexclusive(server->task);
6616         RUNTIME_CHECK(result == ISC_R_SUCCESS);
6617         flushed = ISC_TRUE;
6618         found = ISC_FALSE;
6619
6620         /*
6621          * Flushing a cache is tricky when caches are shared by multiple views.
6622          * We first identify which caches should be flushed in the local cache
6623          * list, flush these caches, and then update other views that refer to
6624          * the flushed cache DB.
6625          */
6626         if (viewname != NULL) {
6627                 /*
6628                  * Mark caches that need to be flushed.  This is an O(#view^2)
6629                  * operation in the very worst case, but should be normally
6630                  * much more lightweight because only a few (most typically just
6631                  * one) views will match.
6632                  */
6633                 for (view = ISC_LIST_HEAD(server->viewlist);
6634                      view != NULL;
6635                      view = ISC_LIST_NEXT(view, link))
6636                 {
6637                         if (strcasecmp(viewname, view->name) != 0)
6638                                 continue;
6639                         found = ISC_TRUE;
6640                         for (nsc = ISC_LIST_HEAD(server->cachelist);
6641                              nsc != NULL;
6642                              nsc = ISC_LIST_NEXT(nsc, link)) {
6643                                 if (nsc->cache == view->cache)
6644                                         break;
6645                         }
6646                         INSIST(nsc != NULL);
6647                         nsc->needflush = ISC_TRUE;
6648                 }
6649         } else
6650                 found = ISC_TRUE;
6651
6652         /* Perform flush */
6653         for (nsc = ISC_LIST_HEAD(server->cachelist);
6654              nsc != NULL;
6655              nsc = ISC_LIST_NEXT(nsc, link)) {
6656                 if (viewname != NULL && !nsc->needflush)
6657                         continue;
6658                 nsc->needflush = ISC_TRUE;
6659                 result = dns_view_flushcache2(nsc->primaryview, ISC_FALSE);
6660                 if (result != ISC_R_SUCCESS) {
6661                         flushed = ISC_FALSE;
6662                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6663                                       NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6664                                       "flushing cache in view '%s' failed: %s",
6665                                       nsc->primaryview->name,
6666                                       isc_result_totext(result));
6667                 }
6668         }
6669
6670         /*
6671          * Fix up views that share a flushed cache: let the views update the
6672          * cache DB they're referring to.  This could also be an expensive
6673          * operation, but should typically be marginal: the inner loop is only
6674          * necessary for views that share a cache, and if there are many such
6675          * views the number of shared cache should normally be small.
6676          * A worst case is that we have n views and n/2 caches, each shared by
6677          * two views.  Then this will be a O(n^2/4) operation.
6678          */
6679         for (view = ISC_LIST_HEAD(server->viewlist);
6680              view != NULL;
6681              view = ISC_LIST_NEXT(view, link))
6682         {
6683                 if (!dns_view_iscacheshared(view))
6684                         continue;
6685                 for (nsc = ISC_LIST_HEAD(server->cachelist);
6686                      nsc != NULL;
6687                      nsc = ISC_LIST_NEXT(nsc, link)) {
6688                         if (!nsc->needflush || nsc->cache != view->cache)
6689                                 continue;
6690                         result = dns_view_flushcache2(view, ISC_TRUE);
6691                         if (result != ISC_R_SUCCESS) {
6692                                 flushed = ISC_FALSE;
6693                                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6694                                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6695                                               "fixing cache in view '%s' "
6696                                               "failed: %s", view->name,
6697                                               isc_result_totext(result));
6698                         }
6699                 }
6700         }
6701
6702         /* Cleanup the cache list. */
6703         for (nsc = ISC_LIST_HEAD(server->cachelist);
6704              nsc != NULL;
6705              nsc = ISC_LIST_NEXT(nsc, link)) {
6706                 nsc->needflush = ISC_FALSE;
6707         }
6708
6709         if (flushed && found) {
6710                 if (viewname != NULL)
6711                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6712                                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6713                                       "flushing cache in view '%s' succeeded",
6714                                       viewname);
6715                 else
6716                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6717                                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6718                                       "flushing caches in all views succeeded");
6719                 result = ISC_R_SUCCESS;
6720         } else {
6721                 if (!found) {
6722                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6723                                       NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6724                                       "flushing cache in view '%s' failed: "
6725                                       "view not found", viewname);
6726                         result = ISC_R_NOTFOUND;
6727                 } else
6728                         result = ISC_R_FAILURE;
6729         }
6730         isc_task_endexclusive(server->task);
6731         return (result);
6732 }
6733
6734 isc_result_t
6735 ns_server_flushname(ns_server_t *server, char *args) {
6736         char *ptr, *target, *viewname;
6737         dns_view_t *view;
6738         isc_boolean_t flushed;
6739         isc_boolean_t found;
6740         isc_result_t result;
6741         isc_buffer_t b;
6742         dns_fixedname_t fixed;
6743         dns_name_t *name;
6744
6745         /* Skip the command name. */
6746         ptr = next_token(&args, " \t");
6747         if (ptr == NULL)
6748                 return (ISC_R_UNEXPECTEDEND);
6749
6750         /* Find the domain name to flush. */
6751         target = next_token(&args, " \t");
6752         if (target == NULL)
6753                 return (ISC_R_UNEXPECTEDEND);
6754
6755         isc_buffer_init(&b, target, strlen(target));
6756         isc_buffer_add(&b, strlen(target));
6757         dns_fixedname_init(&fixed);
6758         name = dns_fixedname_name(&fixed);
6759         result = dns_name_fromtext(name, &b, dns_rootname, 0, NULL);
6760         if (result != ISC_R_SUCCESS)
6761                 return (result);
6762
6763         /* Look for the view name. */
6764         viewname = next_token(&args, " \t");
6765
6766         result = isc_task_beginexclusive(server->task);
6767         RUNTIME_CHECK(result == ISC_R_SUCCESS);
6768         flushed = ISC_TRUE;
6769         found = ISC_FALSE;
6770         for (view = ISC_LIST_HEAD(server->viewlist);
6771              view != NULL;
6772              view = ISC_LIST_NEXT(view, link))
6773         {
6774                 if (viewname != NULL && strcasecmp(viewname, view->name) != 0)
6775                         continue;
6776                 found = ISC_TRUE;
6777                 /*
6778                  * It's a little inefficient to try flushing name for all views
6779                  * if some of the views share a single cache.  But since the
6780                  * operation is lightweight we prefer simplicity here.
6781                  */
6782                 result = dns_view_flushname(view, name);
6783                 if (result != ISC_R_SUCCESS) {
6784                         flushed = ISC_FALSE;
6785                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6786                                       NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6787                                       "flushing name '%s' in cache view '%s' "
6788                                       "failed: %s", target, view->name,
6789                                       isc_result_totext(result));
6790                 }
6791         }
6792         if (flushed && found) {
6793                 if (viewname != NULL)
6794                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6795                                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6796                                       "flushing name '%s' in cache view '%s' "
6797                                       "succeeded", target, viewname);
6798                 else
6799                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6800                                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6801                                       "flushing name '%s' in all cache views "
6802                                       "succeeded", target);
6803                 result = ISC_R_SUCCESS;
6804         } else {
6805                 if (!found)
6806                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6807                                       NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6808                                       "flushing name '%s' in cache view '%s' "
6809                                       "failed: view not found", target,
6810                                       viewname);
6811                 result = ISC_R_FAILURE;
6812         }
6813         isc_task_endexclusive(server->task);
6814         return (result);
6815 }
6816
6817 isc_result_t
6818 ns_server_status(ns_server_t *server, isc_buffer_t *text) {
6819         int zonecount, xferrunning, xferdeferred, soaqueries;
6820         unsigned int n;
6821         const char *ob = "", *cb = "", *alt = "";
6822
6823         if (ns_g_server->version_set) {
6824                 ob = " (";
6825                 cb = ")";
6826                 if (ns_g_server->version == NULL)
6827                         alt = "version.bind/txt/ch disabled";
6828                 else
6829                         alt = ns_g_server->version;
6830         }
6831         zonecount = dns_zonemgr_getcount(server->zonemgr, DNS_ZONESTATE_ANY);
6832         xferrunning = dns_zonemgr_getcount(server->zonemgr,
6833                                            DNS_ZONESTATE_XFERRUNNING);
6834         xferdeferred = dns_zonemgr_getcount(server->zonemgr,
6835                                             DNS_ZONESTATE_XFERDEFERRED);
6836         soaqueries = dns_zonemgr_getcount(server->zonemgr,
6837                                           DNS_ZONESTATE_SOAQUERY);
6838
6839         n = snprintf((char *)isc_buffer_used(text),
6840                      isc_buffer_availablelength(text),
6841                      "version: %s%s%s%s\n"
6842 #ifdef ISC_PLATFORM_USETHREADS
6843                      "CPUs found: %u\n"
6844                      "worker threads: %u\n"
6845 #endif
6846                      "number of zones: %u\n"
6847                      "debug level: %d\n"
6848                      "xfers running: %u\n"
6849                      "xfers deferred: %u\n"
6850                      "soa queries in progress: %u\n"
6851                      "query logging is %s\n"
6852                      "recursive clients: %d/%d/%d\n"
6853                      "tcp clients: %d/%d\n"
6854                      "server is up and running",
6855                      ns_g_version, ob, alt, cb,
6856 #ifdef ISC_PLATFORM_USETHREADS
6857                      ns_g_cpus_detected, ns_g_cpus,
6858 #endif
6859                      zonecount, ns_g_debuglevel, xferrunning, xferdeferred,
6860                      soaqueries, server->log_queries ? "ON" : "OFF",
6861                      server->recursionquota.used, server->recursionquota.soft,
6862                      server->recursionquota.max,
6863                      server->tcpquota.used, server->tcpquota.max);
6864         if (n >= isc_buffer_availablelength(text))
6865                 return (ISC_R_NOSPACE);
6866         isc_buffer_add(text, n);
6867         return (ISC_R_SUCCESS);
6868 }
6869
6870 static isc_result_t
6871 delete_keynames(dns_tsig_keyring_t *ring, char *target,
6872                 unsigned int *foundkeys)
6873 {
6874         char namestr[DNS_NAME_FORMATSIZE];
6875         isc_result_t result;
6876         dns_rbtnodechain_t chain;
6877         dns_name_t foundname;
6878         dns_fixedname_t fixedorigin;
6879         dns_name_t *origin;
6880         dns_rbtnode_t *node;
6881         dns_tsigkey_t *tkey;
6882
6883         dns_name_init(&foundname, NULL);
6884         dns_fixedname_init(&fixedorigin);
6885         origin = dns_fixedname_name(&fixedorigin);
6886
6887  again:
6888         dns_rbtnodechain_init(&chain, ring->mctx);
6889         result = dns_rbtnodechain_first(&chain, ring->keys, &foundname,
6890                                         origin);
6891         if (result == ISC_R_NOTFOUND) {
6892                 dns_rbtnodechain_invalidate(&chain);
6893                 return (ISC_R_SUCCESS);
6894         }
6895         if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
6896                 dns_rbtnodechain_invalidate(&chain);
6897                 return (result);
6898         }
6899
6900         for (;;) {
6901                 node = NULL;
6902                 dns_rbtnodechain_current(&chain, &foundname, origin, &node);
6903                 tkey = node->data;
6904
6905                 if (tkey != NULL) {
6906                         if (!tkey->generated)
6907                                 goto nextkey;
6908
6909                         dns_name_format(&tkey->name, namestr, sizeof(namestr));
6910                         if (strcmp(namestr, target) == 0) {
6911                                 (*foundkeys)++;
6912                                 dns_rbtnodechain_invalidate(&chain);
6913                                 (void)dns_rbt_deletename(ring->keys,
6914                                                          &tkey->name,
6915                                                          ISC_FALSE);
6916                                 goto again;
6917                         }
6918                 }
6919
6920         nextkey:
6921                 result = dns_rbtnodechain_next(&chain, &foundname, origin);
6922                 if (result == ISC_R_NOMORE)
6923                         break;
6924                 if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
6925                         dns_rbtnodechain_invalidate(&chain);
6926                         return (result);
6927                 }
6928         }
6929
6930         return (ISC_R_SUCCESS);
6931 }
6932
6933 isc_result_t
6934 ns_server_tsigdelete(ns_server_t *server, char *command, isc_buffer_t *text) {
6935         isc_result_t result;
6936         unsigned int n;
6937         dns_view_t *view;
6938         unsigned int foundkeys = 0;
6939         char *target;
6940         char *viewname;
6941
6942         (void)next_token(&command, " \t");  /* skip command name */
6943         target = next_token(&command, " \t");
6944         if (target == NULL)
6945                 return (ISC_R_UNEXPECTEDEND);
6946         viewname = next_token(&command, " \t");
6947
6948         result = isc_task_beginexclusive(server->task);
6949         RUNTIME_CHECK(result == ISC_R_SUCCESS);
6950         for (view = ISC_LIST_HEAD(server->viewlist);
6951              view != NULL;
6952              view = ISC_LIST_NEXT(view, link)) {
6953                 if (viewname == NULL || strcmp(view->name, viewname) == 0) {
6954                         RWLOCK(&view->dynamickeys->lock, isc_rwlocktype_write);
6955                         result = delete_keynames(view->dynamickeys, target,
6956                                                  &foundkeys);
6957                         RWUNLOCK(&view->dynamickeys->lock,
6958                                  isc_rwlocktype_write);
6959                         if (result != ISC_R_SUCCESS) {
6960                                 isc_task_endexclusive(server->task);
6961                                 return (result);
6962                         }
6963                 }
6964         }
6965         isc_task_endexclusive(server->task);
6966
6967         n = snprintf((char *)isc_buffer_used(text),
6968                      isc_buffer_availablelength(text),
6969                      "%d tsig keys deleted.\n", foundkeys);
6970         if (n >= isc_buffer_availablelength(text))
6971                 return (ISC_R_NOSPACE);
6972         isc_buffer_add(text, n);
6973
6974         return (ISC_R_SUCCESS);
6975 }
6976
6977 static isc_result_t
6978 list_keynames(dns_view_t *view, dns_tsig_keyring_t *ring, isc_buffer_t *text,
6979              unsigned int *foundkeys)
6980 {
6981         char namestr[DNS_NAME_FORMATSIZE];
6982         char creatorstr[DNS_NAME_FORMATSIZE];
6983         isc_result_t result;
6984         dns_rbtnodechain_t chain;
6985         dns_name_t foundname;
6986         dns_fixedname_t fixedorigin;
6987         dns_name_t *origin;
6988         dns_rbtnode_t *node;
6989         dns_tsigkey_t *tkey;
6990         unsigned int n;
6991         const char *viewname;
6992
6993         if (view != NULL)
6994                 viewname = view->name;
6995         else
6996                 viewname = "(global)";
6997
6998         dns_name_init(&foundname, NULL);
6999         dns_fixedname_init(&fixedorigin);
7000         origin = dns_fixedname_name(&fixedorigin);
7001         dns_rbtnodechain_init(&chain, ring->mctx);
7002         result = dns_rbtnodechain_first(&chain, ring->keys, &foundname,
7003                                         origin);
7004         if (result == ISC_R_NOTFOUND) {
7005                 dns_rbtnodechain_invalidate(&chain);
7006                 return (ISC_R_SUCCESS);
7007         }
7008         if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
7009                 dns_rbtnodechain_invalidate(&chain);
7010                 return (result);
7011         }
7012
7013         for (;;) {
7014                 node = NULL;
7015                 dns_rbtnodechain_current(&chain, &foundname, origin, &node);
7016                 tkey = node->data;
7017
7018                 if (tkey != NULL) {
7019                         (*foundkeys)++;
7020                         dns_name_format(&tkey->name, namestr, sizeof(namestr));
7021                         if (tkey->generated) {
7022                                 dns_name_format(tkey->creator, creatorstr,
7023                                                 sizeof(creatorstr));
7024                                 n = snprintf((char *)isc_buffer_used(text),
7025                                              isc_buffer_availablelength(text),
7026                                              "view \"%s\"; type \"dynamic\"; key \"%s\"; creator \"%s\";\n",
7027                                              viewname, namestr, creatorstr);
7028                         } else {
7029                                 n = snprintf((char *)isc_buffer_used(text),
7030                                              isc_buffer_availablelength(text),
7031                                              "view \"%s\"; type \"static\"; key \"%s\";\n",
7032                                              viewname, namestr);
7033                         }
7034                         if (n >= isc_buffer_availablelength(text)) {
7035                                 dns_rbtnodechain_invalidate(&chain);
7036                                 return (ISC_R_NOSPACE);
7037                         }
7038                         isc_buffer_add(text, n);
7039                 }
7040                 result = dns_rbtnodechain_next(&chain, &foundname, origin);
7041                 if (result == ISC_R_NOMORE)
7042                         break;
7043                 if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
7044                         dns_rbtnodechain_invalidate(&chain);
7045                         return (result);
7046                 }
7047         }
7048
7049         return (ISC_R_SUCCESS);
7050 }
7051
7052 isc_result_t
7053 ns_server_tsiglist(ns_server_t *server, isc_buffer_t *text) {
7054         isc_result_t result;
7055         unsigned int n;
7056         dns_view_t *view;
7057         unsigned int foundkeys = 0;
7058
7059         result = isc_task_beginexclusive(server->task);
7060         RUNTIME_CHECK(result == ISC_R_SUCCESS);
7061         for (view = ISC_LIST_HEAD(server->viewlist);
7062              view != NULL;
7063              view = ISC_LIST_NEXT(view, link)) {
7064                 RWLOCK(&view->statickeys->lock, isc_rwlocktype_read);
7065                 result = list_keynames(view, view->statickeys, text,
7066                                        &foundkeys);
7067                 RWUNLOCK(&view->statickeys->lock, isc_rwlocktype_read);
7068                 if (result != ISC_R_SUCCESS) {
7069                         isc_task_endexclusive(server->task);
7070                         return (result);
7071                 }
7072                 RWLOCK(&view->dynamickeys->lock, isc_rwlocktype_read);
7073                 result = list_keynames(view, view->dynamickeys, text,
7074                                        &foundkeys);
7075                 RWUNLOCK(&view->dynamickeys->lock, isc_rwlocktype_read);
7076                 if (result != ISC_R_SUCCESS) {
7077                         isc_task_endexclusive(server->task);
7078                         return (result);
7079                 }
7080         }
7081         isc_task_endexclusive(server->task);
7082
7083         if (foundkeys == 0) {
7084                 n = snprintf((char *)isc_buffer_used(text),
7085                              isc_buffer_availablelength(text),
7086                              "no tsig keys found.\n");
7087                 if (n >= isc_buffer_availablelength(text))
7088                         return (ISC_R_NOSPACE);
7089                 isc_buffer_add(text, n);
7090         }
7091
7092         return (ISC_R_SUCCESS);
7093 }
7094
7095 /*
7096  * Act on a "sign" or "loadkeys" command from the command channel.
7097  */
7098 isc_result_t
7099 ns_server_rekey(ns_server_t *server, char *args) {
7100         isc_result_t result;
7101         dns_zone_t *zone = NULL;
7102         dns_zonetype_t type;
7103         isc_uint16_t keyopts;
7104         isc_boolean_t fullsign = ISC_FALSE;
7105
7106         if (strncasecmp(args, NS_COMMAND_SIGN, strlen(NS_COMMAND_SIGN)) == 0)
7107             fullsign = ISC_TRUE;
7108
7109         result = zone_from_args(server, args, &zone, NULL);
7110         if (result != ISC_R_SUCCESS)
7111                 return (result);
7112         if (zone == NULL)
7113                 return (ISC_R_UNEXPECTEDEND);   /* XXX: or do all zones? */
7114
7115         type = dns_zone_gettype(zone);
7116         if (type != dns_zone_master) {
7117                 dns_zone_detach(&zone);
7118                 return (DNS_R_NOTMASTER);
7119         }
7120
7121         keyopts = dns_zone_getkeyopts(zone);
7122
7123         /* "rndc loadkeys" requires "auto-dnssec maintain". */
7124         if ((keyopts & DNS_ZONEKEY_ALLOW) == 0)
7125                 result = ISC_R_NOPERM;
7126         else if ((keyopts & DNS_ZONEKEY_MAINTAIN) == 0 && !fullsign)
7127                 result = ISC_R_NOPERM;
7128         else
7129                 dns_zone_rekey(zone, fullsign);
7130
7131         dns_zone_detach(&zone);
7132         return (result);
7133 }
7134
7135 /*
7136  * Act on a "freeze" or "thaw" command from the command channel.
7137  */
7138 isc_result_t
7139 ns_server_freeze(ns_server_t *server, isc_boolean_t freeze, char *args,
7140                  isc_buffer_t *text)
7141 {
7142         isc_result_t result, tresult;
7143         dns_zone_t *zone = NULL;
7144         dns_zonetype_t type;
7145         char classstr[DNS_RDATACLASS_FORMATSIZE];
7146         char zonename[DNS_NAME_FORMATSIZE];
7147         dns_view_t *view;
7148         char *journal;
7149         const char *vname, *sep;
7150         isc_boolean_t frozen;
7151         const char *msg = NULL;
7152
7153         result = zone_from_args(server, args, &zone, NULL);
7154         if (result != ISC_R_SUCCESS)
7155                 return (result);
7156         if (zone == NULL) {
7157                 result = isc_task_beginexclusive(server->task);
7158                 RUNTIME_CHECK(result == ISC_R_SUCCESS);
7159                 tresult = ISC_R_SUCCESS;
7160                 for (view = ISC_LIST_HEAD(server->viewlist);
7161                      view != NULL;
7162                      view = ISC_LIST_NEXT(view, link)) {
7163                         result = dns_view_freezezones(view, freeze);
7164                         if (result != ISC_R_SUCCESS &&
7165                             tresult == ISC_R_SUCCESS)
7166                                 tresult = result;
7167                 }
7168                 isc_task_endexclusive(server->task);
7169                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
7170                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
7171                               "%s all zones: %s",
7172                               freeze ? "freezing" : "thawing",
7173                               isc_result_totext(tresult));
7174                 return (tresult);
7175         }
7176         type = dns_zone_gettype(zone);
7177         if (type != dns_zone_master) {
7178                 dns_zone_detach(&zone);
7179                 return (DNS_R_NOTMASTER);
7180         }
7181
7182         result = isc_task_beginexclusive(server->task);
7183         RUNTIME_CHECK(result == ISC_R_SUCCESS);
7184         frozen = dns_zone_getupdatedisabled(zone);
7185         if (freeze) {
7186                 if (frozen) {
7187                         msg = "WARNING: The zone was already frozen.\n"
7188                               "Someone else may be editing it or "
7189                               "it may still be re-loading.";
7190                         result = DNS_R_FROZEN;
7191                 }
7192                 if (result == ISC_R_SUCCESS) {
7193                         result = dns_zone_flush(zone);
7194                         if (result != ISC_R_SUCCESS)
7195                                 msg = "Flushing the zone updates to "
7196                                       "disk failed.";
7197                 }
7198                 if (result == ISC_R_SUCCESS) {
7199                         journal = dns_zone_getjournal(zone);
7200                         if (journal != NULL)
7201                                 (void)isc_file_remove(journal);
7202                 }
7203                 if (result == ISC_R_SUCCESS)
7204                         dns_zone_setupdatedisabled(zone, freeze);
7205         } else {
7206                 if (frozen) {
7207                         result = dns_zone_loadandthaw(zone);
7208                         switch (result) {
7209                         case ISC_R_SUCCESS:
7210                         case DNS_R_UPTODATE:
7211                                 msg = "The zone reload and thaw was "
7212                                       "successful.";
7213                                 result = ISC_R_SUCCESS;
7214                                 break;
7215                         case DNS_R_CONTINUE:
7216                                 msg = "A zone reload and thaw was started.\n"
7217                                       "Check the logs to see the result.";
7218                                 result = ISC_R_SUCCESS;
7219                                 break;
7220                         }
7221                 }
7222         }
7223         isc_task_endexclusive(server->task);
7224
7225         if (msg != NULL && strlen(msg) < isc_buffer_availablelength(text))
7226                 isc_buffer_putmem(text, (const unsigned char *)msg,
7227                                   strlen(msg) + 1);
7228
7229         view = dns_zone_getview(zone);
7230         if (strcmp(view->name, "_default") == 0 ||
7231             strcmp(view->name, "_bind") == 0)
7232         {
7233                 vname = "";
7234                 sep = "";
7235         } else {
7236                 vname = view->name;
7237                 sep = " ";
7238         }
7239         dns_rdataclass_format(dns_zone_getclass(zone), classstr,
7240                               sizeof(classstr));
7241         dns_name_format(dns_zone_getorigin(zone),
7242                         zonename, sizeof(zonename));
7243         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
7244                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
7245                       "%s zone '%s/%s'%s%s: %s",
7246                       freeze ? "freezing" : "thawing",
7247                       zonename, classstr, sep, vname,
7248                       isc_result_totext(result));
7249         dns_zone_detach(&zone);
7250         return (result);
7251 }
7252
7253 #ifdef HAVE_LIBSCF
7254 /*
7255  * This function adds a message for rndc to echo if named
7256  * is managed by smf and is also running chroot.
7257  */
7258 isc_result_t
7259 ns_smf_add_message(isc_buffer_t *text) {
7260         unsigned int n;
7261
7262         n = snprintf((char *)isc_buffer_used(text),
7263                 isc_buffer_availablelength(text),
7264                 "use svcadm(1M) to manage named");
7265         if (n >= isc_buffer_availablelength(text))
7266                 return (ISC_R_NOSPACE);
7267         isc_buffer_add(text, n);
7268         return (ISC_R_SUCCESS);
7269 }
7270 #endif /* HAVE_LIBSCF */
7271
7272 /*
7273  * Act on an "addzone" command from the command channel.
7274  */
7275 isc_result_t
7276 ns_server_add_zone(ns_server_t *server, char *args) {
7277         isc_result_t         result;
7278         isc_buffer_t         argbuf;
7279         size_t               arglen;
7280         cfg_parser_t        *parser = NULL;
7281         cfg_obj_t           *config = NULL;
7282         const cfg_obj_t     *vconfig = NULL;
7283         const cfg_obj_t     *views = NULL;
7284         const cfg_obj_t     *parms = NULL;
7285         const cfg_obj_t     *obj = NULL;
7286         const cfg_listelt_t *element;
7287         const char          *zonename;
7288         const char          *classname = NULL;
7289         const char          *argp;
7290         const char          *viewname = NULL;
7291         dns_rdataclass_t     rdclass;
7292         dns_view_t          *view = 0;
7293         isc_buffer_t         buf, *nbuf = NULL;
7294         dns_name_t           dnsname;
7295         dns_zone_t          *zone = NULL;
7296         FILE                *fp = NULL;
7297         struct cfg_context  *cfg = NULL;
7298
7299         /* Try to parse the argument string */
7300         arglen = strlen(args);
7301         isc_buffer_init(&argbuf, args, arglen);
7302         isc_buffer_add(&argbuf, strlen(args));
7303         CHECK(cfg_parser_create(server->mctx, ns_g_lctx, &parser));
7304         CHECK(cfg_parse_buffer(parser, &argbuf, &cfg_type_addzoneconf,
7305                                &config));
7306         CHECK(cfg_map_get(config, "addzone", &parms));
7307
7308         zonename = cfg_obj_asstring(cfg_tuple_get(parms, "name"));
7309         isc_buffer_init(&buf, zonename, strlen(zonename));
7310         isc_buffer_add(&buf, strlen(zonename));
7311         dns_name_init(&dnsname, NULL);
7312         isc_buffer_allocate(server->mctx, &nbuf, 256);
7313         dns_name_setbuffer(&dnsname, nbuf);
7314         CHECK(dns_name_fromtext(&dnsname, &buf, dns_rootname, ISC_FALSE, NULL));
7315
7316         /* Make sense of optional class argument */
7317         obj = cfg_tuple_get(parms, "class");
7318         CHECK(ns_config_getclass(obj, dns_rdataclass_in, &rdclass));
7319         if (rdclass != dns_rdataclass_in && obj)
7320                 classname = cfg_obj_asstring(obj);
7321
7322         /* Make sense of optional view argument */
7323         obj = cfg_tuple_get(parms, "view");
7324         if (obj && cfg_obj_isstring(obj))
7325                 viewname = cfg_obj_asstring(obj);
7326         if (viewname == NULL || *viewname == '\0')
7327                 viewname = "_default";
7328         CHECK(dns_viewlist_find(&server->viewlist, viewname, rdclass, &view));
7329
7330         /* Are we accepting new zones? */
7331         if (view->new_zone_file == NULL) {
7332                 result = ISC_R_NOPERM;
7333                 goto cleanup;
7334         }
7335
7336         cfg = (struct cfg_context *) view->new_zone_config;
7337         if (cfg == NULL) {
7338                 result = ISC_R_FAILURE;
7339                 goto cleanup;
7340         }
7341
7342         /* Zone shouldn't already exist */
7343         result = dns_zt_find(view->zonetable, &dnsname, 0, NULL, &zone);
7344         if (result == ISC_R_SUCCESS) {
7345                 result = ISC_R_EXISTS;
7346                 goto cleanup;
7347         } else if (result == DNS_R_PARTIALMATCH) {
7348                 /* Create our sub-zone anyway */
7349                 dns_zone_detach(&zone);
7350                 zone = NULL;
7351         }
7352         else if (result != ISC_R_NOTFOUND)
7353                 goto cleanup;
7354
7355         /* Find the view statement */
7356         cfg_map_get(cfg->config, "view", &views);
7357         for (element = cfg_list_first(views);
7358              element != NULL;
7359              element = cfg_list_next(element))
7360         {
7361                 const char *vname;
7362                 vconfig = cfg_listelt_value(element);
7363                 vname = cfg_obj_asstring(cfg_tuple_get(vconfig, "name"));
7364                 if (vname && !strcasecmp(vname, viewname))
7365                         break;
7366                 vconfig = NULL;
7367         }
7368
7369         /* Open save file for write configuration */
7370         CHECK(isc_stdio_open(view->new_zone_file, "a", &fp));
7371
7372         /* Mark view unfrozen so that zone can be added */
7373         isc_task_beginexclusive(server->task);
7374         dns_view_thaw(view);
7375         result = configure_zone(cfg->config, parms, vconfig,
7376                                 server->mctx, view, cfg->actx, ISC_FALSE);
7377         dns_view_freeze(view);
7378         isc_task_endexclusive(server->task);
7379         if (result != ISC_R_SUCCESS)
7380                 goto cleanup;
7381
7382         /* Is it there yet? */
7383         CHECK(dns_zt_find(view->zonetable, &dnsname, 0, NULL, &zone));
7384
7385         /*
7386          * Load the zone from the master file.  If this fails, we'll
7387          * need to undo the configuration we've done already.
7388          */
7389         result = dns_zone_loadnew(zone);
7390         if (result != ISC_R_SUCCESS) {
7391                 dns_db_t *dbp = NULL;
7392
7393                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
7394                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
7395                               "addzone failed; reverting.");
7396
7397                 /* If the zone loaded partially, unload it */
7398                 if (dns_zone_getdb(zone, &dbp) == ISC_R_SUCCESS) {
7399                         dns_db_detach(&dbp);
7400                         dns_zone_unload(zone);
7401                 }
7402
7403                 /* Remove the zone from the zone table */
7404                 dns_zt_unmount(view->zonetable, zone);
7405                 goto cleanup;
7406         }
7407
7408         /* Flag the zone as having been added at runtime */
7409         dns_zone_setadded(zone, ISC_TRUE);
7410
7411         /* Emit just the zone name from args */
7412         CHECK(isc_stdio_write("zone ", 5, 1, fp, NULL));
7413         CHECK(isc_stdio_write(zonename, strlen(zonename), 1, fp, NULL));
7414         CHECK(isc_stdio_write(" ", 1, 1, fp, NULL));
7415
7416         /* Classname, if not default */
7417         if (classname != NULL && *classname != '\0') {
7418                 CHECK(isc_stdio_write(classname, strlen(classname), 1, fp,
7419                                       NULL));
7420                 CHECK(isc_stdio_write(" ", 1, 1, fp, NULL));
7421         }
7422
7423         /* Find beginning of option block from args */
7424         for (argp = args; *argp; argp++, arglen--) {
7425                 if (*argp == '{') {     /* Assume matching '}' */
7426                         /* Add that to our file */
7427                         CHECK(isc_stdio_write(argp, arglen, 1, fp, NULL));
7428
7429                         /* Make sure we end with a LF */
7430                         if (argp[arglen-1] != '\n') {
7431                                 CHECK(isc_stdio_write("\n", 1, 1, fp, NULL));
7432                         }
7433                         break;
7434                 }
7435         }
7436
7437         CHECK(isc_stdio_close(fp));
7438         fp = NULL;
7439         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
7440                                   NS_LOGMODULE_SERVER, ISC_LOG_INFO,
7441                                   "zone %s added to view %s via addzone",
7442                                   zonename, viewname);
7443
7444         result = ISC_R_SUCCESS;
7445
7446  cleanup:
7447         if (fp != NULL)
7448                 isc_stdio_close(fp);
7449         if (parser != NULL) {
7450                 if (config != NULL)
7451                         cfg_obj_destroy(parser, &config);
7452                 cfg_parser_destroy(&parser);
7453         }
7454         if (zone != NULL)
7455                 dns_zone_detach(&zone);
7456         if (view != NULL)
7457                 dns_view_detach(&view);
7458         if (nbuf != NULL)
7459                 isc_buffer_free(&nbuf);
7460
7461         return (result);
7462 }
7463
7464 /*
7465  * Act on a "delzone" command from the command channel.
7466  */
7467 isc_result_t
7468 ns_server_del_zone(ns_server_t *server, char *args) {
7469         isc_result_t           result;
7470         dns_zone_t            *zone = NULL;
7471         dns_view_t            *view = NULL;
7472         dns_db_t              *dbp = NULL;
7473         const char            *filename = NULL;
7474         char                  *tmpname = NULL;
7475         char                   buf[1024];
7476         const char            *zonename = NULL;
7477         size_t                 znamelen = 0;
7478         FILE                  *ifp = NULL, *ofp = NULL;
7479
7480         /* Parse parameters */
7481         CHECK(zone_from_args(server, args, &zone, &zonename));
7482         if (result != ISC_R_SUCCESS)
7483                 return (result);
7484         if (zone == NULL) {
7485                 result = ISC_R_UNEXPECTEDEND;
7486                 goto cleanup;
7487         }
7488
7489         /*
7490          * Was this zone originally added at runtime?
7491          * If not, we can't delete it now.
7492          */
7493         if (!dns_zone_getadded(zone)) {
7494                 result = ISC_R_NOPERM;
7495                 goto cleanup;
7496         }
7497
7498         if (zonename != NULL)
7499                 znamelen = strlen(zonename);
7500
7501         /* Dig out configuration for this zone */
7502         view = dns_zone_getview(zone);
7503         filename = view->new_zone_file;
7504         if (filename == NULL) {
7505                 /* No adding zones in this view */
7506                 result = ISC_R_FAILURE;
7507                 goto cleanup;
7508         }
7509
7510         /* Rewrite zone list */
7511         result = isc_stdio_open(filename, "r", &ifp);
7512         if (ifp != NULL && result == ISC_R_SUCCESS) {
7513                 char *found = NULL, *p = NULL;
7514                 size_t n;
7515
7516                 /* Create a temporary file */
7517                 CHECK(isc_string_printf(buf, 1023, "%s.%ld", filename,
7518                                         (long)getpid()));
7519                 if (!(tmpname = isc_mem_strdup(server->mctx, buf))) {
7520                         result = ISC_R_NOMEMORY;
7521                         goto cleanup;
7522                 }
7523                 CHECK(isc_stdio_open(tmpname, "w", &ofp));
7524
7525                 /* Look for the entry for that zone */
7526                 while (fgets(buf, 1024, ifp)) {
7527                         /* A 'zone' line */
7528                         if (strncasecmp(buf, "zone", 4)) {
7529                                 fputs(buf, ofp);
7530                                 continue;
7531                         }
7532                         p = buf+4;
7533
7534                         /* Locate a name */
7535                         while (*p &&
7536                                ((*p == '"') || isspace((unsigned char)*p)))
7537                                 p++;
7538
7539                         /* Is that the zone we're looking for */
7540                         if (strncasecmp(p, zonename, znamelen)) {
7541                                 fputs(buf, ofp);
7542                                 continue;
7543                         }
7544
7545                         /* And nothing else? */
7546                         p += znamelen;
7547                         if (isspace((unsigned char)*p) ||
7548                             *p == '"' || *p == '{') {
7549                                 /* This must be the entry */
7550                                 found = p;
7551                                 break;
7552                         }
7553
7554                         /* Spit it out, keep looking */
7555                         fputs(buf, ofp);
7556                 }
7557
7558                 /* Skip over an option block (matching # of braces) */
7559                 if (found) {
7560                         int obrace = 0, cbrace = 0;
7561                         for (;;) {
7562                                 while (*p) {
7563                                         if (*p == '{') obrace++;
7564                                         if (*p == '}') cbrace++;
7565                                         p++;
7566                                 }
7567                                 if (obrace && (obrace == cbrace))
7568                                         break;
7569                                 if (!fgets(buf, 1024, ifp))
7570                                         break;
7571                                 p = buf;
7572                         }
7573
7574                         /* Just spool the remainder of the file out */
7575                         result = isc_stdio_read(buf, 1, 1024, ifp, &n);
7576                         while (n > 0U) {
7577                                 if (result == ISC_R_EOF)
7578                                         result = ISC_R_SUCCESS;
7579                                 CHECK(result);
7580                                 isc_stdio_write(buf, 1, n, ofp, NULL);
7581                                 result = isc_stdio_read(buf, 1, 1024, ifp, &n);
7582                         }
7583
7584                         /* Move temporary into place */
7585                         CHECK(isc_file_rename(tmpname, view->new_zone_file));
7586                 } else {
7587                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
7588                                       NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
7589                                       "deleted zone %s was missing from "
7590                                       "new zone file", zonename);
7591                         goto cleanup;
7592                 }
7593         }
7594
7595         /* Stop answering for this zone */
7596         if (dns_zone_getdb(zone, &dbp) == ISC_R_SUCCESS) {
7597                 dns_db_detach(&dbp);
7598                 dns_zone_unload(zone);
7599         }
7600
7601         CHECK(dns_zt_unmount(view->zonetable, zone));
7602
7603         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
7604                                   NS_LOGMODULE_SERVER, ISC_LOG_INFO,
7605                                   "zone %s removed via delzone", zonename);
7606
7607         result = ISC_R_SUCCESS;
7608
7609  cleanup:
7610         if (ifp != NULL)
7611                 isc_stdio_close(ifp);
7612         if (ofp != NULL) {
7613                 isc_stdio_close(ofp);
7614                 isc_file_remove(tmpname);
7615         }
7616         if (tmpname != NULL)
7617                 isc_mem_free(server->mctx, tmpname);
7618         if (zone != NULL)
7619                 dns_zone_detach(&zone);
7620
7621         return (result);
7622 }
7623
7624 static void
7625 newzone_cfgctx_destroy(void **cfgp) {
7626         struct cfg_context *cfg;
7627
7628         REQUIRE(cfgp != NULL && *cfgp != NULL);
7629
7630         cfg = *cfgp;
7631
7632         if (cfg->actx != NULL)
7633                 cfg_aclconfctx_detach(&cfg->actx);
7634
7635         if (cfg->parser != NULL) {
7636                 if (cfg->config != NULL)
7637                         cfg_obj_destroy(cfg->parser, &cfg->config);
7638                 cfg_parser_destroy(&cfg->parser);
7639         }
7640         if (cfg->nzparser != NULL) {
7641                 if (cfg->nzconfig != NULL)
7642                         cfg_obj_destroy(cfg->nzparser, &cfg->nzconfig);
7643                 cfg_parser_destroy(&cfg->nzparser);
7644         }
7645
7646         isc_mem_putanddetach(&cfg->mctx, cfg, sizeof(*cfg));
7647         *cfgp = NULL;
7648 }