contrib/bind9/bin/named/server.c

   1 /*
   2  * Copyright (C) 2004-2011  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 1.599.8.12 2011-08-02 04:58:45 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] = { "_builtin", "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                 dlvobj = cfg_listelt_value(cfg_list_first(obj));
2600                 if (!strcmp(cfg_obj_asstring(cfg_tuple_get(dlvobj, "domain")),
2601                             "auto") &&
2602                     cfg_obj_isvoid(cfg_tuple_get(dlvobj, "trust-anchor"))) {
2603                         auto_dlv = ISC_TRUE;
2604                         obj = NULL;
2605                         result = cfg_map_get(ns_g_defaults,
2606                                              "dnssec-lookaside", &obj);
2607                 }
2608         }
2609
2610         if (result == ISC_R_SUCCESS) {
2611                 for (element = cfg_list_first(obj);
2612                      element != NULL;
2613                      element = cfg_list_next(element))
2614                 {
2615                         const char *str;
2616                         isc_buffer_t b;
2617                         dns_name_t *dlv;
2618
2619                         obj = cfg_listelt_value(element);
2620                         str = cfg_obj_asstring(cfg_tuple_get(obj,
2621                                                              "trust-anchor"));
2622                         isc_buffer_init(&b, str, strlen(str));
2623                         isc_buffer_add(&b, strlen(str));
2624                         dlv = dns_fixedname_name(&view->dlv_fixed);
2625                         CHECK(dns_name_fromtext(dlv, &b, dns_rootname,
2626                                                 DNS_NAME_DOWNCASE, NULL));
2627                         view->dlv = dns_fixedname_name(&view->dlv_fixed);
2628                 }
2629         } else
2630                 view->dlv = NULL;
2631
2632         /*
2633          * For now, there is only one kind of trusted keys, the
2634          * "security roots".
2635          */
2636         CHECK(configure_view_dnsseckeys(view, vconfig, config, bindkeys,
2637                                         auto_dlv, auto_root, mctx));
2638         dns_resolver_resetmustbesecure(view->resolver);
2639         obj = NULL;
2640         result = ns_config_get(maps, "dnssec-must-be-secure", &obj);
2641         if (result == ISC_R_SUCCESS)
2642                 CHECK(mustbesecure(obj, view->resolver));
2643
2644         obj = NULL;
2645         result = ns_config_get(maps, "preferred-glue", &obj);
2646         if (result == ISC_R_SUCCESS) {
2647                 str = cfg_obj_asstring(obj);
2648                 if (strcasecmp(str, "a") == 0)
2649                         view->preferred_glue = dns_rdatatype_a;
2650                 else if (strcasecmp(str, "aaaa") == 0)
2651                         view->preferred_glue = dns_rdatatype_aaaa;
2652                 else
2653                         view->preferred_glue = 0;
2654         } else
2655                 view->preferred_glue = 0;
2656
2657         obj = NULL;
2658         result = ns_config_get(maps, "root-delegation-only", &obj);
2659         if (result == ISC_R_SUCCESS) {
2660                 dns_view_setrootdelonly(view, ISC_TRUE);
2661                 if (!cfg_obj_isvoid(obj)) {
2662                         dns_fixedname_t fixed;
2663                         dns_name_t *name;
2664                         isc_buffer_t b;
2665                         const char *str;
2666                         const cfg_obj_t *exclude;
2667
2668                         dns_fixedname_init(&fixed);
2669                         name = dns_fixedname_name(&fixed);
2670                         for (element = cfg_list_first(obj);
2671                              element != NULL;
2672                              element = cfg_list_next(element)) {
2673                                 exclude = cfg_listelt_value(element);
2674                                 str = cfg_obj_asstring(exclude);
2675                                 isc_buffer_init(&b, str, strlen(str));
2676                                 isc_buffer_add(&b, strlen(str));
2677                                 CHECK(dns_name_fromtext(name, &b, dns_rootname,
2678                                                         0, NULL));
2679                                 CHECK(dns_view_excludedelegationonly(view,
2680                                                                      name));
2681                         }
2682                 }
2683         } else
2684                 dns_view_setrootdelonly(view, ISC_FALSE);
2685
2686         /*
2687          * Setup automatic empty zones.  If recursion is off then
2688          * they are disabled by default.
2689          */
2690         obj = NULL;
2691         (void)ns_config_get(maps, "empty-zones-enable", &obj);
2692         (void)ns_config_get(maps, "disable-empty-zone", &disablelist);
2693         if (obj == NULL && disablelist == NULL &&
2694             view->rdclass == dns_rdataclass_in) {
2695                 rfc1918 = ISC_FALSE;
2696                 empty_zones_enable = view->recursion;
2697         } else if (view->rdclass == dns_rdataclass_in) {
2698                 rfc1918 = ISC_TRUE;
2699                 if (obj != NULL)
2700                         empty_zones_enable = cfg_obj_asboolean(obj);
2701                 else
2702                         empty_zones_enable = view->recursion;
2703         } else {
2704                 rfc1918 = ISC_FALSE;
2705                 empty_zones_enable = ISC_FALSE;
2706         }
2707         if (empty_zones_enable) {
2708                 const char *empty;
2709                 int empty_zone = 0;
2710                 dns_fixedname_t fixed;
2711                 dns_name_t *name;
2712                 isc_buffer_t buffer;
2713                 const char *str;
2714                 char server[DNS_NAME_FORMATSIZE + 1];
2715                 char contact[DNS_NAME_FORMATSIZE + 1];
2716                 isc_boolean_t logit;
2717                 const char *empty_dbtype[4] =
2718                                     { "_builtin", "empty", NULL, NULL };
2719                 int empty_dbtypec = 4;
2720                 isc_boolean_t zonestats_on;
2721
2722                 dns_fixedname_init(&fixed);
2723                 name = dns_fixedname_name(&fixed);
2724
2725                 obj = NULL;
2726                 result = ns_config_get(maps, "empty-server", &obj);
2727                 if (result == ISC_R_SUCCESS) {
2728                         str = cfg_obj_asstring(obj);
2729                         isc_buffer_init(&buffer, str, strlen(str));
2730                         isc_buffer_add(&buffer, strlen(str));
2731                         CHECK(dns_name_fromtext(name, &buffer, dns_rootname, 0,
2732                                                 NULL));
2733                         isc_buffer_init(&buffer, server, sizeof(server) - 1);
2734                         CHECK(dns_name_totext(name, ISC_FALSE, &buffer));
2735                         server[isc_buffer_usedlength(&buffer)] = 0;
2736                         empty_dbtype[2] = server;
2737                 } else
2738                         empty_dbtype[2] = "@";
2739
2740                 obj = NULL;
2741                 result = ns_config_get(maps, "empty-contact", &obj);
2742                 if (result == ISC_R_SUCCESS) {
2743                         str = cfg_obj_asstring(obj);
2744                         isc_buffer_init(&buffer, str, strlen(str));
2745                         isc_buffer_add(&buffer, strlen(str));
2746                         CHECK(dns_name_fromtext(name, &buffer, dns_rootname, 0,
2747                                                 NULL));
2748                         isc_buffer_init(&buffer, contact, sizeof(contact) - 1);
2749                         CHECK(dns_name_totext(name, ISC_FALSE, &buffer));
2750                         contact[isc_buffer_usedlength(&buffer)] = 0;
2751                         empty_dbtype[3] = contact;
2752                 } else
2753                         empty_dbtype[3] = ".";
2754
2755                 obj = NULL;
2756                 result = ns_config_get(maps, "zone-statistics", &obj);
2757                 INSIST(result == ISC_R_SUCCESS);
2758                 zonestats_on = cfg_obj_asboolean(obj);
2759
2760                 logit = ISC_TRUE;
2761                 for (empty = empty_zones[empty_zone].zone;
2762                      empty != NULL;
2763                      empty = empty_zones[++empty_zone].zone)
2764                 {
2765                         dns_forwarders_t *forwarders = NULL;
2766                         dns_view_t *pview = NULL;
2767
2768                         isc_buffer_init(&buffer, empty, strlen(empty));
2769                         isc_buffer_add(&buffer, strlen(empty));
2770                         /*
2771                          * Look for zone on drop list.
2772                          */
2773                         CHECK(dns_name_fromtext(name, &buffer, dns_rootname, 0,
2774                                                 NULL));
2775                         if (disablelist != NULL &&
2776                             on_disable_list(disablelist, name))
2777                                 continue;
2778
2779                         /*
2780                          * This zone already exists.
2781                          */
2782                         (void)dns_view_findzone(view, name, &zone);
2783                         if (zone != NULL) {
2784                                 CHECK(setquerystats(zone, mctx, zonestats_on));
2785                                 dns_zone_detach(&zone);
2786                                 continue;
2787                         }
2788
2789                         /*
2790                          * If we would forward this name don't add a
2791                          * empty zone for it.
2792                          */
2793                         result = dns_fwdtable_find(view->fwdtable, name,
2794                                                    &forwarders);
2795                         if (result == ISC_R_SUCCESS &&
2796                             forwarders->fwdpolicy == dns_fwdpolicy_only)
2797                                 continue;
2798
2799                         if (!rfc1918 && empty_zones[empty_zone].rfc1918) {
2800                                 if (logit) {
2801                                         isc_log_write(ns_g_lctx,
2802                                                       NS_LOGCATEGORY_GENERAL,
2803                                                       NS_LOGMODULE_SERVER,
2804                                                       ISC_LOG_WARNING,
2805                                                       "Warning%s%s: "
2806                                                       "'empty-zones-enable/"
2807                                                       "disable-empty-zone' "
2808                                                       "not set: disabling "
2809                                                       "RFC 1918 empty zones",
2810                                                       sep, viewname);
2811                                         logit = ISC_FALSE;
2812                                 }
2813                                 continue;
2814                         }
2815
2816                         /*
2817                          * See if we can re-use a existing zone.
2818                          */
2819                         result = dns_viewlist_find(&ns_g_server->viewlist,
2820                                                    view->name, view->rdclass,
2821                                                    &pview);
2822                         if (result != ISC_R_NOTFOUND &&
2823                             result != ISC_R_SUCCESS)
2824                                 goto cleanup;
2825
2826                         if (pview != NULL) {
2827                                 (void)dns_view_findzone(pview, name, &zone);
2828                                 dns_view_detach(&pview);
2829                                 if (zone != NULL)
2830                                         check_dbtype(&zone, empty_dbtypec,
2831                                                      empty_dbtype, mctx);
2832                                 if (zone != NULL) {
2833                                         dns_zone_setview(zone, view);
2834                                         CHECK(dns_view_addzone(view, zone));
2835                                         CHECK(setquerystats(zone, mctx,
2836                                                             zonestats_on));
2837                                         dns_zone_detach(&zone);
2838                                         continue;
2839                                 }
2840                         }
2841
2842                         CHECK(dns_zone_create(&zone, mctx));
2843                         CHECK(dns_zone_setorigin(zone, name));
2844                         dns_zone_setview(zone, view);
2845                         CHECK(dns_zonemgr_managezone(ns_g_server->zonemgr, zone));
2846                         dns_zone_setclass(zone, view->rdclass);
2847                         dns_zone_settype(zone, dns_zone_master);
2848                         dns_zone_setstats(zone, ns_g_server->zonestats);
2849                         CHECK(dns_zone_setdbtype(zone, empty_dbtypec,
2850                                                  empty_dbtype));
2851                         if (view->queryacl != NULL)
2852                                 dns_zone_setqueryacl(zone, view->queryacl);
2853                         if (view->queryonacl != NULL)
2854                                 dns_zone_setqueryonacl(zone, view->queryonacl);
2855                         dns_zone_setdialup(zone, dns_dialuptype_no);
2856                         dns_zone_setnotifytype(zone, dns_notifytype_no);
2857                         dns_zone_setoption(zone, DNS_ZONEOPT_NOCHECKNS,
2858                                            ISC_TRUE);
2859                         CHECK(setquerystats(zone, mctx, zonestats_on));
2860                         CHECK(dns_view_addzone(view, zone));
2861                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
2862                                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
2863                                       "automatic empty zone%s%s: %s",
2864                                       sep, viewname,  empty);
2865                         dns_zone_detach(&zone);
2866                 }
2867         }
2868
2869         /*
2870          * Make the list of response policy zone names for views that
2871          * are used for real lookups and so care about hints.
2872          */
2873         zonelist = NULL;
2874         if (view->rdclass == dns_rdataclass_in && need_hints) {
2875                 obj = NULL;
2876                 result = ns_config_get(maps, "response-policy", &obj);
2877                 if (result == ISC_R_SUCCESS)
2878                         cfg_map_get(obj, "zone", &zonelist);
2879         }
2880
2881         if (zonelist != NULL) {
2882                 for (element = cfg_list_first(zonelist);
2883                      element != NULL;
2884                      element = cfg_list_next(element)) {
2885                         result = configure_rpz(view, element);
2886                         if (result != ISC_R_SUCCESS)
2887                                 goto cleanup;
2888                         dns_rpz_set_need(ISC_TRUE);
2889                 }
2890         }
2891
2892         result = ISC_R_SUCCESS;
2893
2894  cleanup:
2895         if (clients != NULL)
2896                 dns_acl_detach(&clients);
2897         if (mapped != NULL)
2898                 dns_acl_detach(&mapped);
2899         if (excluded != NULL)
2900                 dns_acl_detach(&excluded);
2901         if (ring != NULL)
2902                 dns_tsigkeyring_detach(&ring);
2903         if (zone != NULL)
2904                 dns_zone_detach(&zone);
2905         if (dispatch4 != NULL)
2906                 dns_dispatch_detach(&dispatch4);
2907         if (dispatch6 != NULL)
2908                 dns_dispatch_detach(&dispatch6);
2909         if (resstats != NULL)
2910                 isc_stats_detach(&resstats);
2911         if (resquerystats != NULL)
2912                 dns_stats_detach(&resquerystats);
2913         if (order != NULL)
2914                 dns_order_detach(&order);
2915         if (cmctx != NULL)
2916                 isc_mem_detach(&cmctx);
2917         if (hmctx != NULL)
2918                 isc_mem_detach(&hmctx);
2919
2920         if (cache != NULL)
2921                 dns_cache_detach(&cache);
2922
2923         return (result);
2924 }
2925
2926 static isc_result_t
2927 configure_hints(dns_view_t *view, const char *filename) {
2928         isc_result_t result;
2929         dns_db_t *db;
2930
2931         db = NULL;
2932         result = dns_rootns_create(view->mctx, view->rdclass, filename, &db);
2933         if (result == ISC_R_SUCCESS) {
2934                 dns_view_sethints(view, db);
2935                 dns_db_detach(&db);
2936         }
2937
2938         return (result);
2939 }
2940
2941 static isc_result_t
2942 configure_alternates(const cfg_obj_t *config, dns_view_t *view,
2943                      const cfg_obj_t *alternates)
2944 {
2945         const cfg_obj_t *portobj;
2946         const cfg_obj_t *addresses;
2947         const cfg_listelt_t *element;
2948         isc_result_t result = ISC_R_SUCCESS;
2949         in_port_t port;
2950
2951         /*
2952          * Determine which port to send requests to.
2953          */
2954         if (ns_g_lwresdonly && ns_g_port != 0)
2955                 port = ns_g_port;
2956         else
2957                 CHECKM(ns_config_getport(config, &port), "port");
2958
2959         if (alternates != NULL) {
2960                 portobj = cfg_tuple_get(alternates, "port");
2961                 if (cfg_obj_isuint32(portobj)) {
2962                         isc_uint32_t val = cfg_obj_asuint32(portobj);
2963                         if (val > ISC_UINT16_MAX) {
2964                                 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
2965                                             "port '%u' out of range", val);
2966                                 return (ISC_R_RANGE);
2967                         }
2968                         port = (in_port_t) val;
2969                 }
2970         }
2971
2972         addresses = NULL;
2973         if (alternates != NULL)
2974                 addresses = cfg_tuple_get(alternates, "addresses");
2975
2976         for (element = cfg_list_first(addresses);
2977              element != NULL;
2978              element = cfg_list_next(element))
2979         {
2980                 const cfg_obj_t *alternate = cfg_listelt_value(element);
2981                 isc_sockaddr_t sa;
2982
2983                 if (!cfg_obj_issockaddr(alternate)) {
2984                         dns_fixedname_t fixed;
2985                         dns_name_t *name;
2986                         const char *str = cfg_obj_asstring(cfg_tuple_get(
2987                                                            alternate, "name"));
2988                         isc_buffer_t buffer;
2989                         in_port_t myport = port;
2990
2991                         isc_buffer_init(&buffer, str, strlen(str));
2992                         isc_buffer_add(&buffer, strlen(str));
2993                         dns_fixedname_init(&fixed);
2994                         name = dns_fixedname_name(&fixed);
2995                         CHECK(dns_name_fromtext(name, &buffer, dns_rootname, 0,
2996                                                 NULL));
2997
2998                         portobj = cfg_tuple_get(alternate, "port");
2999                         if (cfg_obj_isuint32(portobj)) {
3000                                 isc_uint32_t val = cfg_obj_asuint32(portobj);
3001                                 if (val > ISC_UINT16_MAX) {
3002                                         cfg_obj_log(portobj, ns_g_lctx,
3003                                                     ISC_LOG_ERROR,
3004                                                     "port '%u' out of range",
3005                                                      val);
3006                                         return (ISC_R_RANGE);
3007                                 }
3008                                 myport = (in_port_t) val;
3009                         }
3010                         CHECK(dns_resolver_addalternate(view->resolver, NULL,
3011                                                         name, myport));
3012                         continue;
3013                 }
3014
3015                 sa = *cfg_obj_assockaddr(alternate);
3016                 if (isc_sockaddr_getport(&sa) == 0)
3017                         isc_sockaddr_setport(&sa, port);
3018                 CHECK(dns_resolver_addalternate(view->resolver, &sa,
3019                                                 NULL, 0));
3020         }
3021
3022  cleanup:
3023         return (result);
3024 }
3025
3026 static isc_result_t
3027 configure_forward(const cfg_obj_t *config, dns_view_t *view, dns_name_t *origin,
3028                   const cfg_obj_t *forwarders, const cfg_obj_t *forwardtype)
3029 {
3030         const cfg_obj_t *portobj;
3031         const cfg_obj_t *faddresses;
3032         const cfg_listelt_t *element;
3033         dns_fwdpolicy_t fwdpolicy = dns_fwdpolicy_none;
3034         isc_sockaddrlist_t addresses;
3035         isc_sockaddr_t *sa;
3036         isc_result_t result;
3037         in_port_t port;
3038
3039         ISC_LIST_INIT(addresses);
3040
3041         /*
3042          * Determine which port to send forwarded requests to.
3043          */
3044         if (ns_g_lwresdonly && ns_g_port != 0)
3045                 port = ns_g_port;
3046         else
3047                 CHECKM(ns_config_getport(config, &port), "port");
3048
3049         if (forwarders != NULL) {
3050                 portobj = cfg_tuple_get(forwarders, "port");
3051                 if (cfg_obj_isuint32(portobj)) {
3052                         isc_uint32_t val = cfg_obj_asuint32(portobj);
3053                         if (val > ISC_UINT16_MAX) {
3054                                 cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
3055                                             "port '%u' out of range", val);
3056                                 return (ISC_R_RANGE);
3057                         }
3058                         port = (in_port_t) val;
3059                 }
3060         }
3061
3062         faddresses = NULL;
3063         if (forwarders != NULL)
3064                 faddresses = cfg_tuple_get(forwarders, "addresses");
3065
3066         for (element = cfg_list_first(faddresses);
3067              element != NULL;
3068              element = cfg_list_next(element))
3069         {
3070                 const cfg_obj_t *forwarder = cfg_listelt_value(element);
3071                 sa = isc_mem_get(view->mctx, sizeof(isc_sockaddr_t));
3072                 if (sa == NULL) {
3073                         result = ISC_R_NOMEMORY;
3074                         goto cleanup;
3075                 }
3076                 *sa = *cfg_obj_assockaddr(forwarder);
3077                 if (isc_sockaddr_getport(sa) == 0)
3078                         isc_sockaddr_setport(sa, port);
3079                 ISC_LINK_INIT(sa, link);
3080                 ISC_LIST_APPEND(addresses, sa, link);
3081         }
3082
3083         if (ISC_LIST_EMPTY(addresses)) {
3084                 if (forwardtype != NULL)
3085                         cfg_obj_log(forwarders, ns_g_lctx, ISC_LOG_WARNING,
3086                                     "no forwarders seen; disabling "
3087                                     "forwarding");
3088                 fwdpolicy = dns_fwdpolicy_none;
3089         } else {
3090                 if (forwardtype == NULL)
3091                         fwdpolicy = dns_fwdpolicy_first;
3092                 else {
3093                         const char *forwardstr = cfg_obj_asstring(forwardtype);
3094                         if (strcasecmp(forwardstr, "first") == 0)
3095                                 fwdpolicy = dns_fwdpolicy_first;
3096                         else if (strcasecmp(forwardstr, "only") == 0)
3097                                 fwdpolicy = dns_fwdpolicy_only;
3098                         else
3099                                 INSIST(0);
3100                 }
3101         }
3102
3103         result = dns_fwdtable_add(view->fwdtable, origin, &addresses,
3104                                   fwdpolicy);
3105         if (result != ISC_R_SUCCESS) {
3106                 char namebuf[DNS_NAME_FORMATSIZE];
3107                 dns_name_format(origin, namebuf, sizeof(namebuf));
3108                 cfg_obj_log(forwarders, ns_g_lctx, ISC_LOG_WARNING,
3109                             "could not set up forwarding for domain '%s': %s",
3110                             namebuf, isc_result_totext(result));
3111                 goto cleanup;
3112         }
3113
3114         result = ISC_R_SUCCESS;
3115
3116  cleanup:
3117
3118         while (!ISC_LIST_EMPTY(addresses)) {
3119                 sa = ISC_LIST_HEAD(addresses);
3120                 ISC_LIST_UNLINK(addresses, sa, link);
3121                 isc_mem_put(view->mctx, sa, sizeof(isc_sockaddr_t));
3122         }
3123
3124         return (result);
3125 }
3126
3127 static isc_result_t
3128 get_viewinfo(const cfg_obj_t *vconfig, const char **namep,
3129              dns_rdataclass_t *classp)
3130 {
3131         isc_result_t result = ISC_R_SUCCESS;
3132         const char *viewname;
3133         dns_rdataclass_t viewclass;
3134
3135         REQUIRE(namep != NULL && *namep == NULL);
3136         REQUIRE(classp != NULL);
3137
3138         if (vconfig != NULL) {
3139                 const cfg_obj_t *classobj = NULL;
3140
3141                 viewname = cfg_obj_asstring(cfg_tuple_get(vconfig, "name"));
3142                 classobj = cfg_tuple_get(vconfig, "class");
3143                 result = ns_config_getclass(classobj, dns_rdataclass_in,
3144                                             &viewclass);
3145         } else {
3146                 viewname = "_default";
3147                 viewclass = dns_rdataclass_in;
3148         }
3149
3150         *namep = viewname;
3151         *classp = viewclass;
3152
3153         return (result);
3154 }
3155
3156 /*
3157  * Find a view based on its configuration info and attach to it.
3158  *
3159  * If 'vconfig' is NULL, attach to the default view.
3160  */
3161 static isc_result_t
3162 find_view(const cfg_obj_t *vconfig, dns_viewlist_t *viewlist,
3163           dns_view_t **viewp)
3164 {
3165         isc_result_t result;
3166         const char *viewname = NULL;
3167         dns_rdataclass_t viewclass;
3168         dns_view_t *view = NULL;
3169
3170         result = get_viewinfo(vconfig, &viewname, &viewclass);
3171         if (result != ISC_R_SUCCESS)
3172                 return (result);
3173
3174         result = dns_viewlist_find(viewlist, viewname, viewclass, &view);
3175         if (result != ISC_R_SUCCESS)
3176                 return (result);
3177
3178         *viewp = view;
3179         return (ISC_R_SUCCESS);
3180 }
3181
3182 /*
3183  * Create a new view and add it to the list.
3184  *
3185  * If 'vconfig' is NULL, create the default view.
3186  *
3187  * The view created is attached to '*viewp'.
3188  */
3189 static isc_result_t
3190 create_view(const cfg_obj_t *vconfig, dns_viewlist_t *viewlist,
3191             dns_view_t **viewp)
3192 {
3193         isc_result_t result;
3194         const char *viewname = NULL;
3195         dns_rdataclass_t viewclass;
3196         dns_view_t *view = NULL;
3197
3198         result = get_viewinfo(vconfig, &viewname, &viewclass);
3199         if (result != ISC_R_SUCCESS)
3200                 return (result);
3201
3202         result = dns_viewlist_find(viewlist, viewname, viewclass, &view);
3203         if (result == ISC_R_SUCCESS)
3204                 return (ISC_R_EXISTS);
3205         if (result != ISC_R_NOTFOUND)
3206                 return (result);
3207         INSIST(view == NULL);
3208
3209         result = dns_view_create(ns_g_mctx, viewclass, viewname, &view);
3210         if (result != ISC_R_SUCCESS)
3211                 return (result);
3212
3213         ISC_LIST_APPEND(*viewlist, view, link);
3214         dns_view_attach(view, viewp);
3215         return (ISC_R_SUCCESS);
3216 }
3217
3218 /*
3219  * Configure or reconfigure a zone.
3220  */
3221 static isc_result_t
3222 configure_zone(const cfg_obj_t *config, const cfg_obj_t *zconfig,
3223                const cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
3224                cfg_aclconfctx_t *aclconf, isc_boolean_t added)
3225 {
3226         dns_view_t *pview = NULL;       /* Production view */
3227         dns_zone_t *zone = NULL;        /* New or reused zone */
3228         dns_zone_t *dupzone = NULL;
3229         const cfg_obj_t *options = NULL;
3230         const cfg_obj_t *zoptions = NULL;
3231         const cfg_obj_t *typeobj = NULL;
3232         const cfg_obj_t *forwarders = NULL;
3233         const cfg_obj_t *forwardtype = NULL;
3234         const cfg_obj_t *only = NULL;
3235         isc_result_t result;
3236         isc_result_t tresult;
3237         isc_buffer_t buffer;
3238         dns_fixedname_t fixorigin;
3239         dns_name_t *origin;
3240         const char *zname;
3241         dns_rdataclass_t zclass;
3242         const char *ztypestr;
3243
3244         options = NULL;
3245         (void)cfg_map_get(config, "options", &options);
3246
3247         zoptions = cfg_tuple_get(zconfig, "options");
3248
3249         /*
3250          * Get the zone origin as a dns_name_t.
3251          */
3252         zname = cfg_obj_asstring(cfg_tuple_get(zconfig, "name"));
3253         isc_buffer_init(&buffer, zname, strlen(zname));
3254         isc_buffer_add(&buffer, strlen(zname));
3255         dns_fixedname_init(&fixorigin);
3256         CHECK(dns_name_fromtext(dns_fixedname_name(&fixorigin),
3257                                 &buffer, dns_rootname, 0, NULL));
3258         origin = dns_fixedname_name(&fixorigin);
3259
3260         CHECK(ns_config_getclass(cfg_tuple_get(zconfig, "class"),
3261                                  view->rdclass, &zclass));
3262         if (zclass != view->rdclass) {
3263                 const char *vname = NULL;
3264                 if (vconfig != NULL)
3265                         vname = cfg_obj_asstring(cfg_tuple_get(vconfig,
3266                                                                "name"));
3267                 else
3268                         vname = "<default view>";
3269
3270                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3271                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
3272                               "zone '%s': wrong class for view '%s'",
3273                               zname, vname);
3274                 result = ISC_R_FAILURE;
3275                 goto cleanup;
3276         }
3277
3278         (void)cfg_map_get(zoptions, "type", &typeobj);
3279         if (typeobj == NULL) {
3280                 cfg_obj_log(zconfig, ns_g_lctx, ISC_LOG_ERROR,
3281                             "zone '%s' 'type' not specified", zname);
3282                 return (ISC_R_FAILURE);
3283         }
3284         ztypestr = cfg_obj_asstring(typeobj);
3285
3286         /*
3287          * "hints zones" aren't zones.  If we've got one,
3288          * configure it and return.
3289          */
3290         if (strcasecmp(ztypestr, "hint") == 0) {
3291                 const cfg_obj_t *fileobj = NULL;
3292                 if (cfg_map_get(zoptions, "file", &fileobj) != ISC_R_SUCCESS) {
3293                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3294                                       NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
3295                                       "zone '%s': 'file' not specified",
3296                                       zname);
3297                         result = ISC_R_FAILURE;
3298                         goto cleanup;
3299                 }
3300                 if (dns_name_equal(origin, dns_rootname)) {
3301                         const char *hintsfile = cfg_obj_asstring(fileobj);
3302
3303                         result = configure_hints(view, hintsfile);
3304                         if (result != ISC_R_SUCCESS) {
3305                                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3306                                               NS_LOGMODULE_SERVER,
3307                                               ISC_LOG_ERROR,
3308                                               "could not configure root hints "
3309                                               "from '%s': %s", hintsfile,
3310                                               isc_result_totext(result));
3311                                 goto cleanup;
3312                         }
3313                         /*
3314                          * Hint zones may also refer to delegation only points.
3315                          */
3316                         only = NULL;
3317                         tresult = cfg_map_get(zoptions, "delegation-only",
3318                                               &only);
3319                         if (tresult == ISC_R_SUCCESS && cfg_obj_asboolean(only))
3320                                 CHECK(dns_view_adddelegationonly(view, origin));
3321                 } else {
3322                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3323                                       NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
3324                                       "ignoring non-root hint zone '%s'",
3325                                       zname);
3326                         result = ISC_R_SUCCESS;
3327                 }
3328                 /* Skip ordinary zone processing. */
3329                 goto cleanup;
3330         }
3331
3332         /*
3333          * "forward zones" aren't zones either.  Translate this syntax into
3334          * the appropriate selective forwarding configuration and return.
3335          */
3336         if (strcasecmp(ztypestr, "forward") == 0) {
3337                 forwardtype = NULL;
3338                 forwarders = NULL;
3339
3340                 (void)cfg_map_get(zoptions, "forward", &forwardtype);
3341                 (void)cfg_map_get(zoptions, "forwarders", &forwarders);
3342                 result = configure_forward(config, view, origin, forwarders,
3343                                            forwardtype);
3344                 goto cleanup;
3345         }
3346
3347         /*
3348          * "delegation-only zones" aren't zones either.
3349          */
3350         if (strcasecmp(ztypestr, "delegation-only") == 0) {
3351                 result = dns_view_adddelegationonly(view, origin);
3352                 goto cleanup;
3353         }
3354
3355         /*
3356          * Check for duplicates in the new zone table.
3357          */
3358         result = dns_view_findzone(view, origin, &dupzone);
3359         if (result == ISC_R_SUCCESS) {
3360                 /*
3361                  * We already have this zone!
3362                  */
3363                 cfg_obj_log(zconfig, ns_g_lctx, ISC_LOG_ERROR,
3364                             "zone '%s' already exists", zname);
3365                 dns_zone_detach(&dupzone);
3366                 result = ISC_R_EXISTS;
3367                 goto cleanup;
3368         }
3369         INSIST(dupzone == NULL);
3370
3371         /*
3372          * See if we can reuse an existing zone.  This is
3373          * only possible if all of these are true:
3374          *   - The zone's view exists
3375          *   - A zone with the right name exists in the view
3376          *   - The zone is compatible with the config
3377          *     options (e.g., an existing master zone cannot
3378          *     be reused if the options specify a slave zone)
3379          */
3380         result = dns_viewlist_find(&ns_g_server->viewlist,
3381                                    view->name, view->rdclass,
3382                                    &pview);
3383         if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
3384                 goto cleanup;
3385         if (pview != NULL)
3386                 result = dns_view_findzone(pview, origin, &zone);
3387         if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
3388                 goto cleanup;
3389         if (zone != NULL && !ns_zone_reusable(zone, zconfig))
3390                 dns_zone_detach(&zone);
3391
3392         if (zone != NULL) {
3393                 /*
3394                  * We found a reusable zone.  Make it use the
3395                  * new view.
3396                  */
3397                 dns_zone_setview(zone, view);
3398                 if (view->acache != NULL)
3399                         dns_zone_setacache(zone, view->acache);
3400         } else {
3401                 /*
3402                  * We cannot reuse an existing zone, we have
3403                  * to create a new one.
3404                  */
3405                 CHECK(dns_zone_create(&zone, mctx));
3406                 CHECK(dns_zone_setorigin(zone, origin));
3407                 dns_zone_setview(zone, view);
3408                 if (view->acache != NULL)
3409                         dns_zone_setacache(zone, view->acache);
3410                 CHECK(dns_zonemgr_managezone(ns_g_server->zonemgr, zone));
3411                 dns_zone_setstats(zone, ns_g_server->zonestats);
3412         }
3413
3414         /*
3415          * If the zone contains a 'forwarders' statement, configure
3416          * selective forwarding.
3417          */
3418         forwarders = NULL;
3419         if (cfg_map_get(zoptions, "forwarders", &forwarders) == ISC_R_SUCCESS)
3420         {
3421                 forwardtype = NULL;
3422                 (void)cfg_map_get(zoptions, "forward", &forwardtype);
3423                 CHECK(configure_forward(config, view, origin, forwarders,
3424                                         forwardtype));
3425         }
3426
3427         /*
3428          * Stub and forward zones may also refer to delegation only points.
3429          */
3430         only = NULL;
3431         if (cfg_map_get(zoptions, "delegation-only", &only) == ISC_R_SUCCESS)
3432         {
3433                 if (cfg_obj_asboolean(only))
3434                         CHECK(dns_view_adddelegationonly(view, origin));
3435         }
3436
3437         /*
3438          * Mark whether the zone was originally added at runtime or not
3439          */
3440         dns_zone_setadded(zone, added);
3441
3442         /*
3443          * Configure the zone.
3444          */
3445         CHECK(ns_zone_configure(config, vconfig, zconfig, aclconf, zone));
3446
3447         /*
3448          * Add the zone to its view in the new view list.
3449          */
3450         CHECK(dns_view_addzone(view, zone));
3451
3452  cleanup:
3453         if (zone != NULL)
3454                 dns_zone_detach(&zone);
3455         if (pview != NULL)
3456                 dns_view_detach(&pview);
3457
3458         return (result);
3459 }
3460
3461 /*
3462  * Configure built-in zone for storing managed-key data.
3463  */
3464
3465 #define KEYZONE "managed-keys.bind"
3466 #define MKEYS ".mkeys"
3467
3468 static isc_result_t
3469 add_keydata_zone(dns_view_t *view, const char *directory, isc_mem_t *mctx) {
3470         isc_result_t result;
3471         dns_view_t *pview = NULL;
3472         dns_zone_t *zone = NULL;
3473         dns_acl_t *none = NULL;
3474         char filename[PATH_MAX];
3475         char buffer[ISC_SHA256_DIGESTSTRINGLENGTH + sizeof(MKEYS)];
3476         int n;
3477
3478         REQUIRE(view != NULL);
3479
3480         /* See if we can re-use an existing keydata zone. */
3481         result = dns_viewlist_find(&ns_g_server->viewlist,
3482                                    view->name, view->rdclass,
3483                                    &pview);
3484         if (result != ISC_R_NOTFOUND &&
3485             result != ISC_R_SUCCESS)
3486                 return (result);
3487
3488         if (pview != NULL && pview->managed_keys != NULL) {
3489                 dns_zone_attach(pview->managed_keys, &view->managed_keys);
3490                 dns_zone_setview(pview->managed_keys, view);
3491                 dns_view_detach(&pview);
3492                 return (ISC_R_SUCCESS);
3493         }
3494
3495         /* No existing keydata zone was found; create one */
3496         CHECK(dns_zone_create(&zone, mctx));
3497         CHECK(dns_zone_setorigin(zone, dns_rootname));
3498
3499         isc_sha256_data((void *)view->name, strlen(view->name), buffer);
3500         strcat(buffer, MKEYS);
3501         n = snprintf(filename, sizeof(filename), "%s%s%s",
3502                      directory ? directory : "", directory ? "/" : "",
3503                      strcmp(view->name, "_default") == 0 ? KEYZONE : buffer);
3504         if (n < 0 || (size_t)n >= sizeof(filename)) {
3505                 result = (n < 0) ? ISC_R_FAILURE : ISC_R_NOSPACE;
3506                 goto cleanup;
3507         }
3508         CHECK(dns_zone_setfile(zone, filename));
3509
3510         dns_zone_setview(zone, view);
3511         dns_zone_settype(zone, dns_zone_key);
3512         dns_zone_setclass(zone, view->rdclass);
3513
3514         CHECK(dns_zonemgr_managezone(ns_g_server->zonemgr, zone));
3515
3516         if (view->acache != NULL)
3517                 dns_zone_setacache(zone, view->acache);
3518
3519         CHECK(dns_acl_none(mctx, &none));
3520         dns_zone_setqueryacl(zone, none);
3521         dns_zone_setqueryonacl(zone, none);
3522         dns_acl_detach(&none);
3523
3524         dns_zone_setdialup(zone, dns_dialuptype_no);
3525         dns_zone_setnotifytype(zone, dns_notifytype_no);
3526         dns_zone_setoption(zone, DNS_ZONEOPT_NOCHECKNS, ISC_TRUE);
3527         dns_zone_setjournalsize(zone, 0);
3528
3529         dns_zone_setstats(zone, ns_g_server->zonestats);
3530         CHECK(setquerystats(zone, mctx, ISC_FALSE));
3531
3532         if (view->managed_keys != NULL)
3533                 dns_zone_detach(&view->managed_keys);
3534         dns_zone_attach(zone, &view->managed_keys);
3535
3536         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3537                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
3538                       "set up managed keys zone for view %s, file '%s'",
3539                       view->name, filename);
3540
3541 cleanup:
3542         if (zone != NULL)
3543                 dns_zone_detach(&zone);
3544         if (none != NULL)
3545                 dns_acl_detach(&none);
3546
3547         return (result);
3548 }
3549
3550 /*
3551  * Configure a single server quota.
3552  */
3553 static void
3554 configure_server_quota(const cfg_obj_t **maps, const char *name,
3555                        isc_quota_t *quota)
3556 {
3557         const cfg_obj_t *obj = NULL;
3558         isc_result_t result;
3559
3560         result = ns_config_get(maps, name, &obj);
3561         INSIST(result == ISC_R_SUCCESS);
3562         isc_quota_max(quota, cfg_obj_asuint32(obj));
3563 }
3564
3565 /*
3566  * This function is called as soon as the 'directory' statement has been
3567  * parsed.  This can be extended to support other options if necessary.
3568  */
3569 static isc_result_t
3570 directory_callback(const char *clausename, const cfg_obj_t *obj, void *arg) {
3571         isc_result_t result;
3572         const char *directory;
3573
3574         REQUIRE(strcasecmp("directory", clausename) == 0);
3575
3576         UNUSED(arg);
3577         UNUSED(clausename);
3578
3579         /*
3580          * Change directory.
3581          */
3582         directory = cfg_obj_asstring(obj);
3583
3584         if (! isc_file_ischdiridempotent(directory))
3585                 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_WARNING,
3586                             "option 'directory' contains relative path '%s'",
3587                             directory);
3588
3589         result = isc_dir_chdir(directory);
3590         if (result != ISC_R_SUCCESS) {
3591                 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR,
3592                             "change directory to '%s' failed: %s",
3593                             directory, isc_result_totext(result));
3594                 return (result);
3595         }
3596
3597         return (ISC_R_SUCCESS);
3598 }
3599
3600 static void
3601 scan_interfaces(ns_server_t *server, isc_boolean_t verbose) {
3602         isc_boolean_t match_mapped = server->aclenv.match_mapped;
3603
3604         ns_interfacemgr_scan(server->interfacemgr, verbose);
3605         /*
3606          * Update the "localhost" and "localnets" ACLs to match the
3607          * current set of network interfaces.
3608          */
3609         dns_aclenv_copy(&server->aclenv,
3610                         ns_interfacemgr_getaclenv(server->interfacemgr));
3611
3612         server->aclenv.match_mapped = match_mapped;
3613 }
3614
3615 static isc_result_t
3616 add_listenelt(isc_mem_t *mctx, ns_listenlist_t *list, isc_sockaddr_t *addr,
3617               isc_boolean_t wcardport_ok)
3618 {
3619         ns_listenelt_t *lelt = NULL;
3620         dns_acl_t *src_acl = NULL;
3621         isc_result_t result;
3622         isc_sockaddr_t any_sa6;
3623         isc_netaddr_t netaddr;
3624
3625         REQUIRE(isc_sockaddr_pf(addr) == AF_INET6);
3626
3627         isc_sockaddr_any6(&any_sa6);
3628         if (!isc_sockaddr_equal(&any_sa6, addr) &&
3629             (wcardport_ok || isc_sockaddr_getport(addr) != 0)) {
3630                 isc_netaddr_fromin6(&netaddr, &addr->type.sin6.sin6_addr);
3631
3632                 result = dns_acl_create(mctx, 0, &src_acl);
3633                 if (result != ISC_R_SUCCESS)
3634                         return (result);
3635
3636                 result = dns_iptable_addprefix(src_acl->iptable,
3637                                                &netaddr, 128, ISC_TRUE);
3638                 if (result != ISC_R_SUCCESS)
3639                         goto clean;
3640
3641                 result = ns_listenelt_create(mctx, isc_sockaddr_getport(addr),
3642                                              src_acl, &lelt);
3643                 if (result != ISC_R_SUCCESS)
3644                         goto clean;
3645                 ISC_LIST_APPEND(list->elts, lelt, link);
3646         }
3647
3648         return (ISC_R_SUCCESS);
3649
3650  clean:
3651         INSIST(lelt == NULL);
3652         dns_acl_detach(&src_acl);
3653
3654         return (result);
3655 }
3656
3657 /*
3658  * Make a list of xxx-source addresses and call ns_interfacemgr_adjust()
3659  * to update the listening interfaces accordingly.
3660  * We currently only consider IPv6, because this only affects IPv6 wildcard
3661  * sockets.
3662  */
3663 static void
3664 adjust_interfaces(ns_server_t *server, isc_mem_t *mctx) {
3665         isc_result_t result;
3666         ns_listenlist_t *list = NULL;
3667         dns_view_t *view;
3668         dns_zone_t *zone, *next;
3669         isc_sockaddr_t addr, *addrp;
3670
3671         result = ns_listenlist_create(mctx, &list);
3672         if (result != ISC_R_SUCCESS)
3673                 return;
3674
3675         for (view = ISC_LIST_HEAD(server->viewlist);
3676              view != NULL;
3677              view = ISC_LIST_NEXT(view, link)) {
3678                 dns_dispatch_t *dispatch6;
3679
3680                 dispatch6 = dns_resolver_dispatchv6(view->resolver);
3681                 if (dispatch6 == NULL)
3682                         continue;
3683                 result = dns_dispatch_getlocaladdress(dispatch6, &addr);
3684                 if (result != ISC_R_SUCCESS)
3685                         goto fail;
3686
3687                 /*
3688                  * We always add non-wildcard address regardless of whether
3689                  * the port is 'any' (the fourth arg is TRUE): if the port is
3690                  * specific, we need to add it since it may conflict with a
3691                  * listening interface; if it's zero, we'll dynamically open
3692                  * query ports, and some of them may override an existing
3693                  * wildcard IPv6 port.
3694                  */
3695                 result = add_listenelt(mctx, list, &addr, ISC_TRUE);
3696                 if (result != ISC_R_SUCCESS)
3697                         goto fail;
3698         }
3699
3700         zone = NULL;
3701         for (result = dns_zone_first(server->zonemgr, &zone);
3702              result == ISC_R_SUCCESS;
3703              next = NULL, result = dns_zone_next(zone, &next), zone = next) {
3704                 dns_view_t *zoneview;
3705
3706                 /*
3707                  * At this point the zone list may contain a stale zone
3708                  * just removed from the configuration.  To see the validity,
3709                  * check if the corresponding view is in our current view list.
3710                  * There may also be old zones that are still in the process
3711                  * of shutting down and have detached from their old view
3712                  * (zoneview == NULL).
3713                  */
3714                 zoneview = dns_zone_getview(zone);
3715                 if (zoneview == NULL)
3716                         continue;
3717                 for (view = ISC_LIST_HEAD(server->viewlist);
3718                      view != NULL && view != zoneview;
3719                      view = ISC_LIST_NEXT(view, link))
3720                         ;
3721                 if (view == NULL)
3722                         continue;
3723
3724                 addrp = dns_zone_getnotifysrc6(zone);
3725                 result = add_listenelt(mctx, list, addrp, ISC_FALSE);
3726                 if (result != ISC_R_SUCCESS)
3727                         goto fail;
3728
3729                 addrp = dns_zone_getxfrsource6(zone);
3730                 result = add_listenelt(mctx, list, addrp, ISC_FALSE);
3731                 if (result != ISC_R_SUCCESS)
3732                         goto fail;
3733         }
3734
3735         ns_interfacemgr_adjust(server->interfacemgr, list, ISC_TRUE);
3736
3737  clean:
3738         ns_listenlist_detach(&list);
3739         return;
3740
3741  fail:
3742         /*
3743          * Even when we failed the procedure, most of other interfaces
3744          * should work correctly.  We therefore just warn it.
3745          */
3746         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3747                       NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
3748                       "could not adjust the listen-on list; "
3749                       "some interfaces may not work");
3750         goto clean;
3751 }
3752
3753 /*
3754  * This event callback is invoked to do periodic network
3755  * interface scanning.
3756  */
3757 static void
3758 interface_timer_tick(isc_task_t *task, isc_event_t *event) {
3759         isc_result_t result;
3760         ns_server_t *server = (ns_server_t *) event->ev_arg;
3761         INSIST(task == server->task);
3762         UNUSED(task);
3763         isc_event_free(&event);
3764         /*
3765          * XXX should scan interfaces unlocked and get exclusive access
3766          * only to replace ACLs.
3767          */
3768         result = isc_task_beginexclusive(server->task);
3769         RUNTIME_CHECK(result == ISC_R_SUCCESS);
3770         scan_interfaces(server, ISC_FALSE);
3771         isc_task_endexclusive(server->task);
3772 }
3773
3774 static void
3775 heartbeat_timer_tick(isc_task_t *task, isc_event_t *event) {
3776         ns_server_t *server = (ns_server_t *) event->ev_arg;
3777         dns_view_t *view;
3778
3779         UNUSED(task);
3780         isc_event_free(&event);
3781         view = ISC_LIST_HEAD(server->viewlist);
3782         while (view != NULL) {
3783                 dns_view_dialup(view);
3784                 view = ISC_LIST_NEXT(view, link);
3785         }
3786 }
3787
3788 static void
3789 pps_timer_tick(isc_task_t *task, isc_event_t *event) {
3790         static unsigned int oldrequests = 0;
3791         unsigned int requests = ns_client_requests;
3792
3793         UNUSED(task);
3794         isc_event_free(&event);
3795
3796         /*
3797          * Don't worry about wrapping as the overflow result will be right.
3798          */
3799         dns_pps = (requests - oldrequests) / 1200;
3800         oldrequests = requests;
3801 }
3802
3803 /*
3804  * Replace the current value of '*field', a dynamically allocated
3805  * string or NULL, with a dynamically allocated copy of the
3806  * null-terminated string pointed to by 'value', or NULL.
3807  */
3808 static isc_result_t
3809 setstring(ns_server_t *server, char **field, const char *value) {
3810         char *copy;
3811
3812         if (value != NULL) {
3813                 copy = isc_mem_strdup(server->mctx, value);
3814                 if (copy == NULL)
3815                         return (ISC_R_NOMEMORY);
3816         } else {
3817                 copy = NULL;
3818         }
3819
3820         if (*field != NULL)
3821                 isc_mem_free(server->mctx, *field);
3822
3823         *field = copy;
3824         return (ISC_R_SUCCESS);
3825 }
3826
3827 /*
3828  * Replace the current value of '*field', a dynamically allocated
3829  * string or NULL, with another dynamically allocated string
3830  * or NULL if whether 'obj' is a string or void value, respectively.
3831  */
3832 static isc_result_t
3833 setoptstring(ns_server_t *server, char **field, const cfg_obj_t *obj) {
3834         if (cfg_obj_isvoid(obj))
3835                 return (setstring(server, field, NULL));
3836         else
3837                 return (setstring(server, field, cfg_obj_asstring(obj)));
3838 }
3839
3840 static void
3841 set_limit(const cfg_obj_t **maps, const char *configname,
3842           const char *description, isc_resource_t resourceid,
3843           isc_resourcevalue_t defaultvalue)
3844 {
3845         const cfg_obj_t *obj = NULL;
3846         const char *resource;
3847         isc_resourcevalue_t value;
3848         isc_result_t result;
3849
3850         if (ns_config_get(maps, configname, &obj) != ISC_R_SUCCESS)
3851                 return;
3852
3853         if (cfg_obj_isstring(obj)) {
3854                 resource = cfg_obj_asstring(obj);
3855                 if (strcasecmp(resource, "unlimited") == 0)
3856                         value = ISC_RESOURCE_UNLIMITED;
3857                 else {
3858                         INSIST(strcasecmp(resource, "default") == 0);
3859                         value = defaultvalue;
3860                 }
3861         } else
3862                 value = cfg_obj_asuint64(obj);
3863
3864         result = isc_resource_setlimit(resourceid, value);
3865         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
3866                       result == ISC_R_SUCCESS ?
3867                         ISC_LOG_DEBUG(3) : ISC_LOG_WARNING,
3868                       "set maximum %s to %" ISC_PRINT_QUADFORMAT "u: %s",
3869                       description, value, isc_result_totext(result));
3870 }
3871
3872 #define SETLIMIT(cfgvar, resource, description) \
3873         set_limit(maps, cfgvar, description, isc_resource_ ## resource, \
3874                   ns_g_init ## resource)
3875
3876 static void
3877 set_limits(const cfg_obj_t **maps) {
3878         SETLIMIT("stacksize", stacksize, "stack size");
3879         SETLIMIT("datasize", datasize, "data size");
3880         SETLIMIT("coresize", coresize, "core size");
3881         SETLIMIT("files", openfiles, "open files");
3882 }
3883
3884 static void
3885 portset_fromconf(isc_portset_t *portset, const cfg_obj_t *ports,
3886                  isc_boolean_t positive)
3887 {
3888         const cfg_listelt_t *element;
3889
3890         for (element = cfg_list_first(ports);
3891              element != NULL;
3892              element = cfg_list_next(element)) {
3893                 const cfg_obj_t *obj = cfg_listelt_value(element);
3894
3895                 if (cfg_obj_isuint32(obj)) {
3896                         in_port_t port = (in_port_t)cfg_obj_asuint32(obj);
3897
3898                         if (positive)
3899                                 isc_portset_add(portset, port);
3900                         else
3901                                 isc_portset_remove(portset, port);
3902                 } else {
3903                         const cfg_obj_t *obj_loport, *obj_hiport;
3904                         in_port_t loport, hiport;
3905
3906                         obj_loport = cfg_tuple_get(obj, "loport");
3907                         loport = (in_port_t)cfg_obj_asuint32(obj_loport);
3908                         obj_hiport = cfg_tuple_get(obj, "hiport");
3909                         hiport = (in_port_t)cfg_obj_asuint32(obj_hiport);
3910
3911                         if (positive)
3912                                 isc_portset_addrange(portset, loport, hiport);
3913                         else {
3914                                 isc_portset_removerange(portset, loport,
3915                                                         hiport);
3916                         }
3917                 }
3918         }
3919 }
3920
3921 static isc_result_t
3922 removed(dns_zone_t *zone, void *uap) {
3923         const char *type;
3924
3925         if (dns_zone_getview(zone) != uap)
3926                 return (ISC_R_SUCCESS);
3927
3928         switch (dns_zone_gettype(zone)) {
3929         case dns_zone_master:
3930                 type = "master";
3931                 break;
3932         case dns_zone_slave:
3933                 type = "slave";
3934                 break;
3935         case dns_zone_stub:
3936                 type = "stub";
3937                 break;
3938         default:
3939                 type = "other";
3940                 break;
3941         }
3942         dns_zone_log(zone, ISC_LOG_INFO, "(%s) removed", type);
3943         return (ISC_R_SUCCESS);
3944 }
3945
3946 static void
3947 cleanup_session_key(ns_server_t *server, isc_mem_t *mctx) {
3948         if (server->session_keyfile != NULL) {
3949                 isc_file_remove(server->session_keyfile);
3950                 isc_mem_free(mctx, server->session_keyfile);
3951                 server->session_keyfile = NULL;
3952         }
3953
3954         if (server->session_keyname != NULL) {
3955                 if (dns_name_dynamic(server->session_keyname))
3956                         dns_name_free(server->session_keyname, mctx);
3957                 isc_mem_put(mctx, server->session_keyname, sizeof(dns_name_t));
3958                 server->session_keyname = NULL;
3959         }
3960
3961         if (server->sessionkey != NULL)
3962                 dns_tsigkey_detach(&server->sessionkey);
3963
3964         server->session_keyalg = DST_ALG_UNKNOWN;
3965         server->session_keybits = 0;
3966 }
3967
3968 static isc_result_t
3969 generate_session_key(const char *filename, const char *keynamestr,
3970                      dns_name_t *keyname, const char *algstr,
3971                      dns_name_t *algname, unsigned int algtype,
3972                      isc_uint16_t bits, isc_mem_t *mctx,
3973                      dns_tsigkey_t **tsigkeyp)
3974 {
3975         isc_result_t result = ISC_R_SUCCESS;
3976         dst_key_t *key = NULL;
3977         isc_buffer_t key_txtbuffer;
3978         isc_buffer_t key_rawbuffer;
3979         char key_txtsecret[256];
3980         char key_rawsecret[64];
3981         isc_region_t key_rawregion;
3982         isc_stdtime_t now;
3983         dns_tsigkey_t *tsigkey = NULL;
3984         FILE *fp = NULL;
3985
3986         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
3987                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
3988                       "generating session key for dynamic DNS");
3989
3990         /* generate key */
3991         result = dst_key_generate(keyname, algtype, bits, 1, 0,
3992                                   DNS_KEYPROTO_ANY, dns_rdataclass_in,
3993                                   mctx, &key);
3994         if (result != ISC_R_SUCCESS)
3995                 return (result);
3996
3997         /*
3998          * Dump the key to the buffer for later use.  Should be done before
3999          * we transfer the ownership of key to tsigkey.
4000          */
4001         isc_buffer_init(&key_rawbuffer, &key_rawsecret, sizeof(key_rawsecret));
4002         CHECK(dst_key_tobuffer(key, &key_rawbuffer));
4003
4004         isc_buffer_usedregion(&key_rawbuffer, &key_rawregion);
4005         isc_buffer_init(&key_txtbuffer, &key_txtsecret, sizeof(key_txtsecret));
4006         CHECK(isc_base64_totext(&key_rawregion, -1, "", &key_txtbuffer));
4007
4008         /* Store the key in tsigkey. */
4009         isc_stdtime_get(&now);
4010         CHECK(dns_tsigkey_createfromkey(dst_key_name(key), algname, key,
4011                                         ISC_FALSE, NULL, now, now, mctx, NULL,
4012                                         &tsigkey));
4013
4014         /* Dump the key to the key file. */
4015         fp = ns_os_openfile(filename, S_IRUSR|S_IWUSR, ISC_TRUE);
4016         if (fp == NULL) {
4017                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4018                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
4019                               "could not create %s", filename);
4020                 result = ISC_R_NOPERM;
4021                 goto cleanup;
4022         }
4023
4024         fprintf(fp, "key \"%s\" {\n"
4025                 "\talgorithm %s;\n"
4026                 "\tsecret \"%.*s\";\n};\n", keynamestr, algstr,
4027                 (int) isc_buffer_usedlength(&key_txtbuffer),
4028                 (char*) isc_buffer_base(&key_txtbuffer));
4029
4030         RUNTIME_CHECK(isc_stdio_flush(fp) == ISC_R_SUCCESS);
4031         RUNTIME_CHECK(isc_stdio_close(fp) == ISC_R_SUCCESS);
4032
4033         dst_key_free(&key);
4034
4035         *tsigkeyp = tsigkey;
4036
4037         return (ISC_R_SUCCESS);
4038
4039   cleanup:
4040         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4041                       NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
4042                       "failed to generate session key "
4043                       "for dynamic DNS: %s", isc_result_totext(result));
4044         if (tsigkey != NULL)
4045                 dns_tsigkey_detach(&tsigkey);
4046         if (key != NULL)
4047                 dst_key_free(&key);
4048
4049         return (result);
4050 }
4051
4052 static isc_result_t
4053 configure_session_key(const cfg_obj_t **maps, ns_server_t *server,
4054                       isc_mem_t *mctx)
4055 {
4056         const char *keyfile, *keynamestr, *algstr;
4057         unsigned int algtype;
4058         dns_fixedname_t fname;
4059         dns_name_t *keyname, *algname;
4060         isc_buffer_t buffer;
4061         isc_uint16_t bits;
4062         const cfg_obj_t *obj;
4063         isc_boolean_t need_deleteold = ISC_FALSE;
4064         isc_boolean_t need_createnew = ISC_FALSE;
4065         isc_result_t result;
4066
4067         obj = NULL;
4068         result = ns_config_get(maps, "session-keyfile", &obj);
4069         if (result == ISC_R_SUCCESS) {
4070                 if (cfg_obj_isvoid(obj))
4071                         keyfile = NULL; /* disable it */
4072                 else
4073                         keyfile = cfg_obj_asstring(obj);
4074         } else
4075                 keyfile = ns_g_defaultsessionkeyfile;
4076
4077         obj = NULL;
4078         result = ns_config_get(maps, "session-keyname", &obj);
4079         INSIST(result == ISC_R_SUCCESS);
4080         keynamestr = cfg_obj_asstring(obj);
4081         dns_fixedname_init(&fname);
4082         isc_buffer_init(&buffer, keynamestr, strlen(keynamestr));
4083         isc_buffer_add(&buffer, strlen(keynamestr));
4084         keyname = dns_fixedname_name(&fname);
4085         result = dns_name_fromtext(keyname, &buffer, dns_rootname, 0, NULL);
4086         if (result != ISC_R_SUCCESS)
4087                 return (result);
4088
4089         obj = NULL;
4090         result = ns_config_get(maps, "session-keyalg", &obj);
4091         INSIST(result == ISC_R_SUCCESS);
4092         algstr = cfg_obj_asstring(obj);
4093         algname = NULL;
4094         result = ns_config_getkeyalgorithm2(algstr, &algname, &algtype, &bits);
4095         if (result != ISC_R_SUCCESS) {
4096                 const char *s = " (keeping current key)";
4097
4098                 cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR, "session-keyalg: "
4099                             "unsupported or unknown algorithm '%s'%s",
4100                             algstr,
4101                             server->session_keyfile != NULL ? s : "");
4102                 return (result);
4103         }
4104
4105         /* See if we need to (re)generate a new key. */
4106         if (keyfile == NULL) {
4107                 if (server->session_keyfile != NULL)
4108                         need_deleteold = ISC_TRUE;
4109         } else if (server->session_keyfile == NULL)
4110                 need_createnew = ISC_TRUE;
4111         else if (strcmp(keyfile, server->session_keyfile) != 0 ||
4112                  !dns_name_equal(server->session_keyname, keyname) ||
4113                  server->session_keyalg != algtype ||
4114                  server->session_keybits != bits) {
4115                 need_deleteold = ISC_TRUE;
4116                 need_createnew = ISC_TRUE;
4117         }
4118
4119         if (need_deleteold) {
4120                 INSIST(server->session_keyfile != NULL);
4121                 INSIST(server->session_keyname != NULL);
4122                 INSIST(server->sessionkey != NULL);
4123
4124                 cleanup_session_key(server, mctx);
4125         }
4126
4127         if (need_createnew) {
4128                 INSIST(server->sessionkey == NULL);
4129                 INSIST(server->session_keyfile == NULL);
4130                 INSIST(server->session_keyname == NULL);
4131                 INSIST(server->session_keyalg == DST_ALG_UNKNOWN);
4132                 INSIST(server->session_keybits == 0);
4133
4134                 server->session_keyname = isc_mem_get(mctx, sizeof(dns_name_t));
4135                 if (server->session_keyname == NULL)
4136                         goto cleanup;
4137                 dns_name_init(server->session_keyname, NULL);
4138                 CHECK(dns_name_dup(keyname, mctx, server->session_keyname));
4139
4140                 server->session_keyfile = isc_mem_strdup(mctx, keyfile);
4141                 if (server->session_keyfile == NULL)
4142                         goto cleanup;
4143
4144                 server->session_keyalg = algtype;
4145                 server->session_keybits = bits;
4146
4147                 CHECK(generate_session_key(keyfile, keynamestr, keyname, algstr,
4148                                            algname, algtype, bits, mctx,
4149                                            &server->sessionkey));
4150         }
4151
4152         return (result);
4153
4154   cleanup:
4155         cleanup_session_key(server, mctx);
4156         return (result);
4157 }
4158
4159 static isc_result_t
4160 setup_newzones(dns_view_t *view, cfg_obj_t *config, cfg_obj_t *vconfig,
4161                cfg_parser_t *parser, cfg_aclconfctx_t *actx)
4162 {
4163         isc_result_t result = ISC_R_SUCCESS;
4164         isc_boolean_t allow = ISC_FALSE;
4165         struct cfg_context *nzcfg = NULL;
4166         cfg_parser_t *nzparser = NULL;
4167         cfg_obj_t *nzconfig = NULL;
4168         const cfg_obj_t *maps[4];
4169         const cfg_obj_t *options = NULL, *voptions = NULL;
4170         const cfg_obj_t *nz = NULL;
4171         int i = 0;
4172
4173         REQUIRE (config != NULL);
4174
4175         if (vconfig != NULL)
4176                 voptions = cfg_tuple_get(vconfig, "options");
4177         if (voptions != NULL)
4178                 maps[i++] = voptions;
4179         result = cfg_map_get(config, "options", &options);
4180         if (result == ISC_R_SUCCESS)
4181                 maps[i++] = options;
4182         maps[i++] = ns_g_defaults;
4183         maps[i] = NULL;
4184
4185         result = ns_config_get(maps, "allow-new-zones", &nz);
4186         if (result == ISC_R_SUCCESS)
4187                 allow = cfg_obj_asboolean(nz);
4188
4189         if (!allow) {
4190                 dns_view_setnewzones(view, ISC_FALSE, NULL, NULL);
4191                 return (ISC_R_SUCCESS);
4192         }
4193
4194         nzcfg = isc_mem_get(view->mctx, sizeof(*nzcfg));
4195         if (nzcfg == NULL) {
4196                 dns_view_setnewzones(view, ISC_FALSE, NULL, NULL);
4197                 return (ISC_R_NOMEMORY);
4198         }
4199
4200         dns_view_setnewzones(view, allow, nzcfg, newzone_cfgctx_destroy);
4201
4202         memset(nzcfg, 0, sizeof(*nzcfg));
4203         isc_mem_attach(view->mctx, &nzcfg->mctx);
4204         cfg_obj_attach(config, &nzcfg->config);
4205         cfg_parser_attach(parser, &nzcfg->parser);
4206         cfg_aclconfctx_attach(actx, &nzcfg->actx);
4207
4208         /*
4209          * Attempt to create a parser and parse the newzones
4210          * file.  If successful, preserve both; otherwise leave
4211          * them NULL.
4212          */
4213         result = cfg_parser_create(view->mctx, ns_g_lctx, &nzparser);
4214         if (result == ISC_R_SUCCESS)
4215                 result = cfg_parse_file(nzparser, view->new_zone_file,
4216                                         &cfg_type_newzones, &nzconfig);
4217         if (result == ISC_R_SUCCESS) {
4218                 cfg_parser_attach(nzparser, &nzcfg->nzparser);
4219                 cfg_obj_attach(nzconfig, &nzcfg->nzconfig);
4220         }
4221
4222         if (nzparser != NULL) {
4223                 if (nzconfig != NULL)
4224                         cfg_obj_destroy(nzparser, &nzconfig);
4225                 cfg_parser_destroy(&nzparser);
4226         }
4227
4228         return (ISC_R_SUCCESS);
4229 }
4230
4231 static int
4232 count_zones(const cfg_obj_t *conf) {
4233         const cfg_obj_t *zonelist = NULL;
4234         const cfg_listelt_t *element;
4235         int n = 0;
4236
4237         REQUIRE(conf != NULL);
4238
4239         cfg_map_get(conf, "zone", &zonelist);
4240         for (element = cfg_list_first(zonelist);
4241              element != NULL;
4242              element = cfg_list_next(element))
4243                 n++;
4244
4245         return (n);
4246 }
4247
4248 static isc_result_t
4249 load_configuration(const char *filename, ns_server_t *server,
4250                    isc_boolean_t first_time)
4251 {
4252         cfg_obj_t *config = NULL, *bindkeys = NULL;
4253         cfg_parser_t *conf_parser = NULL, *bindkeys_parser = NULL;
4254         const cfg_listelt_t *element;
4255         const cfg_obj_t *builtin_views;
4256         const cfg_obj_t *maps[3];
4257         const cfg_obj_t *obj;
4258         const cfg_obj_t *options;
4259         const cfg_obj_t *usev4ports, *avoidv4ports, *usev6ports, *avoidv6ports;
4260         const cfg_obj_t *views;
4261         dns_view_t *view = NULL;
4262         dns_view_t *view_next;
4263         dns_viewlist_t tmpviewlist;
4264         dns_viewlist_t viewlist, builtin_viewlist;
4265         in_port_t listen_port, udpport_low, udpport_high;
4266         int i;
4267         isc_interval_t interval;
4268         isc_portset_t *v4portset = NULL;
4269         isc_portset_t *v6portset = NULL;
4270         isc_resourcevalue_t nfiles;
4271         isc_result_t result;
4272         isc_uint32_t heartbeat_interval;
4273         isc_uint32_t interface_interval;
4274         isc_uint32_t reserved;
4275         isc_uint32_t udpsize;
4276         ns_cachelist_t cachelist, tmpcachelist;
4277         unsigned int maxsocks;
4278         ns_cache_t *nsc;
4279         struct cfg_context *nzctx;
4280         int num_zones = 0;
4281
4282         ISC_LIST_INIT(viewlist);
4283         ISC_LIST_INIT(builtin_viewlist);
4284         ISC_LIST_INIT(cachelist);
4285
4286         /* Ensure exclusive access to configuration data. */
4287         result = isc_task_beginexclusive(server->task);
4288         RUNTIME_CHECK(result == ISC_R_SUCCESS);
4289
4290         /* Create the ACL configuration context */
4291         if (ns_g_aclconfctx != NULL)
4292                 cfg_aclconfctx_detach(&ns_g_aclconfctx);
4293         CHECK(cfg_aclconfctx_create(ns_g_mctx, &ns_g_aclconfctx));
4294
4295         /*
4296          * Parse the global default pseudo-config file.
4297          */
4298         if (first_time) {
4299                 CHECK(ns_config_parsedefaults(ns_g_parser, &ns_g_config));
4300                 RUNTIME_CHECK(cfg_map_get(ns_g_config, "options",
4301                                           &ns_g_defaults) == ISC_R_SUCCESS);
4302         }
4303
4304         /*
4305          * Parse the configuration file using the new config code.
4306          */
4307         result = ISC_R_FAILURE;
4308         config = NULL;
4309
4310         /*
4311          * Unless this is lwresd with the -C option, parse the config file.
4312          */
4313         if (!(ns_g_lwresdonly && lwresd_g_useresolvconf)) {
4314                 isc_log_write(ns_g_lctx,
4315                               NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
4316                               ISC_LOG_INFO, "loading configuration from '%s'",
4317                               filename);
4318                 CHECK(cfg_parser_create(ns_g_mctx, ns_g_lctx, &conf_parser));
4319                 cfg_parser_setcallback(conf_parser, directory_callback, NULL);
4320                 result = cfg_parse_file(conf_parser, filename,
4321                                         &cfg_type_namedconf, &config);
4322         }
4323
4324         /*
4325          * If this is lwresd with the -C option, or lwresd with no -C or -c
4326          * option where the above parsing failed, parse resolv.conf.
4327          */
4328         if (ns_g_lwresdonly &&
4329             (lwresd_g_useresolvconf ||
4330              (!ns_g_conffileset && result == ISC_R_FILENOTFOUND)))
4331         {
4332                 isc_log_write(ns_g_lctx,
4333                               NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
4334                               ISC_LOG_INFO, "loading configuration from '%s'",
4335                               lwresd_g_resolvconffile);
4336                 if (conf_parser != NULL)
4337                         cfg_parser_destroy(&conf_parser);
4338                 CHECK(cfg_parser_create(ns_g_mctx, ns_g_lctx, &conf_parser));
4339                 result = ns_lwresd_parseeresolvconf(ns_g_mctx, conf_parser,
4340                                                     &config);
4341         }
4342         CHECK(result);
4343
4344         /*
4345          * Check the validity of the configuration.
4346          */
4347         CHECK(bind9_check_namedconf(config, ns_g_lctx, ns_g_mctx));
4348
4349         /*
4350          * Fill in the maps array, used for resolving defaults.
4351          */
4352         i = 0;
4353         options = NULL;
4354         result = cfg_map_get(config, "options", &options);
4355         if (result == ISC_R_SUCCESS)
4356                 maps[i++] = options;
4357         maps[i++] = ns_g_defaults;
4358         maps[i] = NULL;
4359
4360         /*
4361          * If bind.keys exists, load it.  If "dnssec-lookaside auto"
4362          * is turned on, the keys found there will be used as default
4363          * trust anchors.
4364          */
4365         obj = NULL;
4366         result = ns_config_get(maps, "bindkeys-file", &obj);
4367         INSIST(result == ISC_R_SUCCESS);
4368         CHECKM(setstring(server, &server->bindkeysfile,
4369                cfg_obj_asstring(obj)), "strdup");
4370
4371         if (access(server->bindkeysfile, R_OK) == 0) {
4372                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4373                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4374                               "reading built-in trusted "
4375                               "keys from file '%s'", server->bindkeysfile);
4376
4377                 CHECK(cfg_parser_create(ns_g_mctx, ns_g_lctx,
4378                                         &bindkeys_parser));
4379
4380                 result = cfg_parse_file(bindkeys_parser, server->bindkeysfile,
4381                                         &cfg_type_bindkeys, &bindkeys);
4382                 CHECK(result);
4383         }
4384
4385         /*
4386          * Set process limits, which (usually) needs to be done as root.
4387          */
4388         set_limits(maps);
4389
4390         /*
4391          * Check if max number of open sockets that the system allows is
4392          * sufficiently large.  Failing this condition is not necessarily fatal,
4393          * but may cause subsequent runtime failures for a busy recursive
4394          * server.
4395          */
4396         result = isc_socketmgr_getmaxsockets(ns_g_socketmgr, &maxsocks);
4397         if (result != ISC_R_SUCCESS)
4398                 maxsocks = 0;
4399         result = isc_resource_getcurlimit(isc_resource_openfiles, &nfiles);
4400         if (result == ISC_R_SUCCESS && (isc_resourcevalue_t)maxsocks > nfiles) {
4401                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4402                               NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
4403                               "max open files (%" ISC_PRINT_QUADFORMAT "u)"
4404                               " is smaller than max sockets (%u)",
4405                               nfiles, maxsocks);
4406         }
4407
4408         /*
4409          * Set the number of socket reserved for TCP, stdio etc.
4410          */
4411         obj = NULL;
4412         result = ns_config_get(maps, "reserved-sockets", &obj);
4413         INSIST(result == ISC_R_SUCCESS);
4414         reserved = cfg_obj_asuint32(obj);
4415         if (maxsocks != 0) {
4416                 if (maxsocks < 128U)                    /* Prevent underflow. */
4417                         reserved = 0;
4418                 else if (reserved > maxsocks - 128U)    /* Minimum UDP space. */
4419                         reserved = maxsocks - 128;
4420         }
4421         /* Minimum TCP/stdio space. */
4422         if (reserved < 128U)
4423                 reserved = 128;
4424         if (reserved + 128U > maxsocks && maxsocks != 0) {
4425                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4426                               NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
4427                               "less than 128 UDP sockets available after "
4428                               "applying 'reserved-sockets' and 'maxsockets'");
4429         }
4430         isc__socketmgr_setreserved(ns_g_socketmgr, reserved);
4431
4432         /*
4433          * Configure various server options.
4434          */
4435         configure_server_quota(maps, "transfers-out", &server->xfroutquota);
4436         configure_server_quota(maps, "tcp-clients", &server->tcpquota);
4437         configure_server_quota(maps, "recursive-clients",
4438                                &server->recursionquota);
4439         if (server->recursionquota.max > 1000)
4440                 isc_quota_soft(&server->recursionquota,
4441                                server->recursionquota.max - 100);
4442         else
4443                 isc_quota_soft(&server->recursionquota, 0);
4444
4445         CHECK(configure_view_acl(NULL, config, "blackhole", NULL,
4446                                  ns_g_aclconfctx, ns_g_mctx,
4447                                  &server->blackholeacl));
4448         if (server->blackholeacl != NULL)
4449                 dns_dispatchmgr_setblackhole(ns_g_dispatchmgr,
4450                                              server->blackholeacl);
4451
4452         obj = NULL;
4453         result = ns_config_get(maps, "match-mapped-addresses", &obj);
4454         INSIST(result == ISC_R_SUCCESS);
4455         server->aclenv.match_mapped = cfg_obj_asboolean(obj);
4456
4457         CHECKM(ns_statschannels_configure(ns_g_server, config, ns_g_aclconfctx),
4458                "configuring statistics server(s)");
4459
4460         /*
4461          * Configure sets of UDP query source ports.
4462          */
4463         CHECKM(isc_portset_create(ns_g_mctx, &v4portset),
4464                "creating UDP port set");
4465         CHECKM(isc_portset_create(ns_g_mctx, &v6portset),
4466                "creating UDP port set");
4467
4468         usev4ports = NULL;
4469         usev6ports = NULL;
4470         avoidv4ports = NULL;
4471         avoidv6ports = NULL;
4472
4473         (void)ns_config_get(maps, "use-v4-udp-ports", &usev4ports);
4474         if (usev4ports != NULL)
4475                 portset_fromconf(v4portset, usev4ports, ISC_TRUE);
4476         else {
4477                 CHECKM(isc_net_getudpportrange(AF_INET, &udpport_low,
4478                                                &udpport_high),
4479                        "get the default UDP/IPv4 port range");
4480                 if (udpport_low == udpport_high)
4481                         isc_portset_add(v4portset, udpport_low);
4482                 else {
4483                         isc_portset_addrange(v4portset, udpport_low,
4484                                              udpport_high);
4485                 }
4486                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4487                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4488                               "using default UDP/IPv4 port range: [%d, %d]",
4489                               udpport_low, udpport_high);
4490         }
4491         (void)ns_config_get(maps, "avoid-v4-udp-ports", &avoidv4ports);
4492         if (avoidv4ports != NULL)
4493                 portset_fromconf(v4portset, avoidv4ports, ISC_FALSE);
4494
4495         (void)ns_config_get(maps, "use-v6-udp-ports", &usev6ports);
4496         if (usev6ports != NULL)
4497                 portset_fromconf(v6portset, usev6ports, ISC_TRUE);
4498         else {
4499                 CHECKM(isc_net_getudpportrange(AF_INET6, &udpport_low,
4500                                                &udpport_high),
4501                        "get the default UDP/IPv6 port range");
4502                 if (udpport_low == udpport_high)
4503                         isc_portset_add(v6portset, udpport_low);
4504                 else {
4505                         isc_portset_addrange(v6portset, udpport_low,
4506                                              udpport_high);
4507                 }
4508                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4509                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4510                               "using default UDP/IPv6 port range: [%d, %d]",
4511                               udpport_low, udpport_high);
4512         }
4513         (void)ns_config_get(maps, "avoid-v6-udp-ports", &avoidv6ports);
4514         if (avoidv6ports != NULL)
4515                 portset_fromconf(v6portset, avoidv6ports, ISC_FALSE);
4516
4517         dns_dispatchmgr_setavailports(ns_g_dispatchmgr, v4portset, v6portset);
4518
4519         /*
4520          * Set the EDNS UDP size when we don't match a view.
4521          */
4522         obj = NULL;
4523         result = ns_config_get(maps, "edns-udp-size", &obj);
4524         INSIST(result == ISC_R_SUCCESS);
4525         udpsize = cfg_obj_asuint32(obj);
4526         if (udpsize < 512)
4527                 udpsize = 512;
4528         if (udpsize > 4096)
4529                 udpsize = 4096;
4530         ns_g_udpsize = (isc_uint16_t)udpsize;
4531
4532         /*
4533          * Configure the zone manager.
4534          */
4535         obj = NULL;
4536         result = ns_config_get(maps, "transfers-in", &obj);
4537         INSIST(result == ISC_R_SUCCESS);
4538         dns_zonemgr_settransfersin(server->zonemgr, cfg_obj_asuint32(obj));
4539
4540         obj = NULL;
4541         result = ns_config_get(maps, "transfers-per-ns", &obj);
4542         INSIST(result == ISC_R_SUCCESS);
4543         dns_zonemgr_settransfersperns(server->zonemgr, cfg_obj_asuint32(obj));
4544
4545         obj = NULL;
4546         result = ns_config_get(maps, "serial-query-rate", &obj);
4547         INSIST(result == ISC_R_SUCCESS);
4548         dns_zonemgr_setserialqueryrate(server->zonemgr, cfg_obj_asuint32(obj));
4549
4550         /*
4551          * Determine which port to use for listening for incoming connections.
4552          */
4553         if (ns_g_port != 0)
4554                 listen_port = ns_g_port;
4555         else
4556                 CHECKM(ns_config_getport(config, &listen_port), "port");
4557
4558         /*
4559          * Find the listen queue depth.
4560          */
4561         obj = NULL;
4562         result = ns_config_get(maps, "tcp-listen-queue", &obj);
4563         INSIST(result == ISC_R_SUCCESS);
4564         ns_g_listen = cfg_obj_asuint32(obj);
4565         if (ns_g_listen < 3)
4566                 ns_g_listen = 3;
4567
4568         /*
4569          * Configure the interface manager according to the "listen-on"
4570          * statement.
4571          */
4572         {
4573                 const cfg_obj_t *clistenon = NULL;
4574                 ns_listenlist_t *listenon = NULL;
4575
4576                 clistenon = NULL;
4577                 /*
4578                  * Even though listen-on is present in the default
4579                  * configuration, we can't use it here, since it isn't
4580                  * used if we're in lwresd mode.  This way is easier.
4581                  */
4582                 if (options != NULL)
4583                         (void)cfg_map_get(options, "listen-on", &clistenon);
4584                 if (clistenon != NULL) {
4585                         /* check return code? */
4586                         (void)ns_listenlist_fromconfig(clistenon, config,
4587                                                        ns_g_aclconfctx,
4588                                                        ns_g_mctx, &listenon);
4589                 } else if (!ns_g_lwresdonly) {
4590                         /*
4591                          * Not specified, use default.
4592                          */
4593                         CHECK(ns_listenlist_default(ns_g_mctx, listen_port,
4594                                                     ISC_TRUE, &listenon));
4595                 }
4596                 if (listenon != NULL) {
4597                         ns_interfacemgr_setlistenon4(server->interfacemgr,
4598                                                      listenon);
4599                         ns_listenlist_detach(&listenon);
4600                 }
4601         }
4602         /*
4603          * Ditto for IPv6.
4604          */
4605         {
4606                 const cfg_obj_t *clistenon = NULL;
4607                 ns_listenlist_t *listenon = NULL;
4608
4609                 if (options != NULL)
4610                         (void)cfg_map_get(options, "listen-on-v6", &clistenon);
4611                 if (clistenon != NULL) {
4612                         /* check return code? */
4613                         (void)ns_listenlist_fromconfig(clistenon, config,
4614                                                        ns_g_aclconfctx,
4615                                                        ns_g_mctx, &listenon);
4616                 } else if (!ns_g_lwresdonly) {
4617                         isc_boolean_t enable;
4618                         /*
4619                          * Not specified, use default.
4620                          */
4621                         enable = ISC_TF(isc_net_probeipv4() != ISC_R_SUCCESS);
4622                         CHECK(ns_listenlist_default(ns_g_mctx, listen_port,
4623                                                     enable, &listenon));
4624                 }
4625                 if (listenon != NULL) {
4626                         ns_interfacemgr_setlistenon6(server->interfacemgr,
4627                                                      listenon);
4628                         ns_listenlist_detach(&listenon);
4629                 }
4630         }
4631
4632         /*
4633          * Rescan the interface list to pick up changes in the
4634          * listen-on option.  It's important that we do this before we try
4635          * to configure the query source, since the dispatcher we use might
4636          * be shared with an interface.
4637          */
4638         scan_interfaces(server, ISC_TRUE);
4639
4640         /*
4641          * Arrange for further interface scanning to occur periodically
4642          * as specified by the "interface-interval" option.
4643          */
4644         obj = NULL;
4645         result = ns_config_get(maps, "interface-interval", &obj);
4646         INSIST(result == ISC_R_SUCCESS);
4647         interface_interval = cfg_obj_asuint32(obj) * 60;
4648         if (interface_interval == 0) {
4649                 CHECK(isc_timer_reset(server->interface_timer,
4650                                       isc_timertype_inactive,
4651                                       NULL, NULL, ISC_TRUE));
4652         } else if (server->interface_interval != interface_interval) {
4653                 isc_interval_set(&interval, interface_interval, 0);
4654                 CHECK(isc_timer_reset(server->interface_timer,
4655                                       isc_timertype_ticker,
4656                                       NULL, &interval, ISC_FALSE));
4657         }
4658         server->interface_interval = interface_interval;
4659
4660         /*
4661          * Configure the dialup heartbeat timer.
4662          */
4663         obj = NULL;
4664         result = ns_config_get(maps, "heartbeat-interval", &obj);
4665         INSIST(result == ISC_R_SUCCESS);
4666         heartbeat_interval = cfg_obj_asuint32(obj) * 60;
4667         if (heartbeat_interval == 0) {
4668                 CHECK(isc_timer_reset(server->heartbeat_timer,
4669                                       isc_timertype_inactive,
4670                                       NULL, NULL, ISC_TRUE));
4671         } else if (server->heartbeat_interval != heartbeat_interval) {
4672                 isc_interval_set(&interval, heartbeat_interval, 0);
4673                 CHECK(isc_timer_reset(server->heartbeat_timer,
4674                                       isc_timertype_ticker,
4675                                       NULL, &interval, ISC_FALSE));
4676         }
4677         server->heartbeat_interval = heartbeat_interval;
4678
4679         isc_interval_set(&interval, 1200, 0);
4680         CHECK(isc_timer_reset(server->pps_timer, isc_timertype_ticker, NULL,
4681                               &interval, ISC_FALSE));
4682
4683         /*
4684          * Write the PID file.
4685          */
4686         obj = NULL;
4687         if (ns_config_get(maps, "pid-file", &obj) == ISC_R_SUCCESS)
4688                 if (cfg_obj_isvoid(obj))
4689                         ns_os_writepidfile(NULL, first_time);
4690                 else
4691                         ns_os_writepidfile(cfg_obj_asstring(obj), first_time);
4692         else if (ns_g_lwresdonly)
4693                 ns_os_writepidfile(lwresd_g_defaultpidfile, first_time);
4694         else
4695                 ns_os_writepidfile(ns_g_defaultpidfile, first_time);
4696
4697         /*
4698          * Configure the server-wide session key.  This must be done before
4699          * configure views because zone configuration may need to know
4700          * session-keyname.
4701          *
4702          * Failure of session key generation isn't fatal at this time; if it
4703          * turns out that a session key is really needed but doesn't exist,
4704          * we'll treat it as a fatal error then.
4705          */
4706         (void)configure_session_key(maps, server, ns_g_mctx);
4707
4708         views = NULL;
4709         (void)cfg_map_get(config, "view", &views);
4710
4711         /*
4712          * Create the views and count all the configured zones in
4713          * order to correctly size the zone manager's task table.
4714          * (We only count zones for configured views; the built-in
4715          * "bind" view can be ignored as it only adds a negligible
4716          * number of zones.)
4717          *
4718          * If we're allowing new zones, we need to be able to find the
4719          * new zone file and count those as well.  So we setup the new
4720          * zone configuration context, but otherwise view configuration
4721          * waits until after the zone manager's task list has been sized.
4722          */
4723         for (element = cfg_list_first(views);
4724              element != NULL;
4725              element = cfg_list_next(element))
4726         {
4727                 cfg_obj_t *vconfig = cfg_listelt_value(element);
4728                 const cfg_obj_t *voptions = cfg_tuple_get(vconfig, "options");
4729                 view = NULL;
4730
4731                 CHECK(create_view(vconfig, &viewlist, &view));
4732                 INSIST(view != NULL);
4733
4734                 num_zones += count_zones(voptions);
4735                 CHECK(setup_newzones(view, config, vconfig, conf_parser,
4736                                      ns_g_aclconfctx));
4737
4738                 nzctx = view->new_zone_config;
4739                 if (nzctx != NULL && nzctx->nzconfig != NULL)
4740                         num_zones += count_zones(nzctx->nzconfig);
4741
4742                 dns_view_detach(&view);
4743         }
4744
4745         /*
4746          * If there were no explicit views then we do the default
4747          * view here.
4748          */
4749         if (views == NULL) {
4750                 CHECK(create_view(NULL, &viewlist, &view));
4751                 INSIST(view != NULL);
4752
4753                 num_zones = count_zones(config);
4754
4755                 CHECK(setup_newzones(view, config, NULL,  conf_parser,
4756                                      ns_g_aclconfctx));
4757
4758                 nzctx = view->new_zone_config;
4759                 if (nzctx != NULL && nzctx->nzconfig != NULL)
4760                         num_zones += count_zones(nzctx->nzconfig);
4761
4762                 dns_view_detach(&view);
4763         }
4764
4765         /*
4766          * Zones have been counted; set the zone manager task pool size.
4767          */
4768         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4769                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4770                       "sizing zone task pool based on %d zones", num_zones);
4771         CHECK(dns_zonemgr_setsize(ns_g_server->zonemgr, num_zones));
4772
4773         /*
4774          * Configure and freeze all explicit views.  Explicit
4775          * views that have zones were already created at parsing
4776          * time, but views with no zones must be created here.
4777          */
4778         for (element = cfg_list_first(views);
4779              element != NULL;
4780              element = cfg_list_next(element))
4781         {
4782                 cfg_obj_t *vconfig = cfg_listelt_value(element);
4783
4784                 view = NULL;
4785                 CHECK(find_view(vconfig, &viewlist, &view));
4786                 CHECK(configure_view(view, config, vconfig,
4787                                      &cachelist, bindkeys, ns_g_mctx,
4788                                      ns_g_aclconfctx, ISC_TRUE));
4789                 dns_view_freeze(view);
4790                 dns_view_detach(&view);
4791         }
4792
4793         /*
4794          * Make sure we have a default view if and only if there
4795          * were no explicit views.
4796          */
4797         if (views == NULL) {
4798                 view = NULL;
4799                 CHECK(find_view(NULL, &viewlist, &view));
4800                 CHECK(configure_view(view, config, NULL,
4801                                      &cachelist, bindkeys,
4802                                      ns_g_mctx, ns_g_aclconfctx, ISC_TRUE));
4803                 dns_view_freeze(view);
4804                 dns_view_detach(&view);
4805         }
4806
4807         /*
4808          * Create (or recreate) the built-in views.
4809          */
4810         builtin_views = NULL;
4811         RUNTIME_CHECK(cfg_map_get(ns_g_config, "view",
4812                                   &builtin_views) == ISC_R_SUCCESS);
4813         for (element = cfg_list_first(builtin_views);
4814              element != NULL;
4815              element = cfg_list_next(element))
4816         {
4817                 cfg_obj_t *vconfig = cfg_listelt_value(element);
4818
4819                 CHECK(create_view(vconfig, &builtin_viewlist, &view));
4820                 CHECK(configure_view(view, config, vconfig,
4821                                      &cachelist, bindkeys,
4822                                      ns_g_mctx, ns_g_aclconfctx, ISC_FALSE));
4823                 dns_view_freeze(view);
4824                 dns_view_detach(&view);
4825                 view = NULL;
4826         }
4827
4828         /* Now combine the two viewlists into one */
4829         ISC_LIST_APPENDLIST(viewlist, builtin_viewlist, link);
4830
4831         /* Swap our new view list with the production one. */
4832         tmpviewlist = server->viewlist;
4833         server->viewlist = viewlist;
4834         viewlist = tmpviewlist;
4835
4836         /* Make the view list available to each of the views */
4837         view = ISC_LIST_HEAD(server->viewlist);
4838         while (view != NULL) {
4839                 view->viewlist = &server->viewlist;
4840                 view = ISC_LIST_NEXT(view, link);
4841         }
4842
4843         /* Swap our new cache list with the production one. */
4844         tmpcachelist = server->cachelist;
4845         server->cachelist = cachelist;
4846         cachelist = tmpcachelist;
4847
4848         /* Load the TKEY information from the configuration. */
4849         if (options != NULL) {
4850                 dns_tkeyctx_t *t = NULL;
4851                 CHECKM(ns_tkeyctx_fromconfig(options, ns_g_mctx, ns_g_entropy,
4852                                              &t),
4853                        "configuring TKEY");
4854                 if (server->tkeyctx != NULL)
4855                         dns_tkeyctx_destroy(&server->tkeyctx);
4856                 server->tkeyctx = t;
4857         }
4858
4859         /*
4860          * Bind the control port(s).
4861          */
4862         CHECKM(ns_controls_configure(ns_g_server->controls, config,
4863                                      ns_g_aclconfctx),
4864                "binding control channel(s)");
4865
4866         /*
4867          * Bind the lwresd port(s).
4868          */
4869         CHECKM(ns_lwresd_configure(ns_g_mctx, config),
4870                "binding lightweight resolver ports");
4871
4872         /*
4873          * Open the source of entropy.
4874          */
4875         if (first_time) {
4876                 obj = NULL;
4877                 result = ns_config_get(maps, "random-device", &obj);
4878                 if (result != ISC_R_SUCCESS) {
4879                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4880                                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4881                                       "no source of entropy found");
4882                 } else {
4883                         const char *randomdev = cfg_obj_asstring(obj);
4884                         result = isc_entropy_createfilesource(ns_g_entropy,
4885                                                               randomdev);
4886                         if (result != ISC_R_SUCCESS)
4887                                 isc_log_write(ns_g_lctx,
4888                                               NS_LOGCATEGORY_GENERAL,
4889                                               NS_LOGMODULE_SERVER,
4890                                               ISC_LOG_INFO,
4891                                               "could not open entropy source "
4892                                               "%s: %s",
4893                                               randomdev,
4894                                               isc_result_totext(result));
4895 #ifdef PATH_RANDOMDEV
4896                         if (ns_g_fallbackentropy != NULL) {
4897                                 if (result != ISC_R_SUCCESS) {
4898                                         isc_log_write(ns_g_lctx,
4899                                                       NS_LOGCATEGORY_GENERAL,
4900                                                       NS_LOGMODULE_SERVER,
4901                                                       ISC_LOG_INFO,
4902                                                       "using pre-chroot entropy source "
4903                                                       "%s",
4904                                                       PATH_RANDOMDEV);
4905                                         isc_entropy_detach(&ns_g_entropy);
4906                                         isc_entropy_attach(ns_g_fallbackentropy,
4907                                                            &ns_g_entropy);
4908                                 }
4909                                 isc_entropy_detach(&ns_g_fallbackentropy);
4910                         }
4911 #endif
4912                 }
4913         }
4914
4915         /*
4916          * Relinquish root privileges.
4917          */
4918         if (first_time)
4919                 ns_os_changeuser();
4920
4921         /*
4922          * Check that the working directory is writable.
4923          */
4924         if (access(".", W_OK) != 0) {
4925                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4926                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
4927                               "the working directory is not writable");
4928         }
4929
4930         /*
4931          * Configure the logging system.
4932          *
4933          * Do this after changing UID to make sure that any log
4934          * files specified in named.conf get created by the
4935          * unprivileged user, not root.
4936          */
4937         if (ns_g_logstderr) {
4938                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4939                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
4940                               "ignoring config file logging "
4941                               "statement due to -g option");
4942         } else {
4943                 const cfg_obj_t *logobj = NULL;
4944                 isc_logconfig_t *logc = NULL;
4945
4946                 CHECKM(isc_logconfig_create(ns_g_lctx, &logc),
4947                        "creating new logging configuration");
4948
4949                 logobj = NULL;
4950                 (void)cfg_map_get(config, "logging", &logobj);
4951                 if (logobj != NULL) {
4952                         CHECKM(ns_log_configure(logc, logobj),
4953                                "configuring logging");
4954                 } else {
4955                         CHECKM(ns_log_setdefaultchannels(logc),
4956                                "setting up default logging channels");
4957                         CHECKM(ns_log_setunmatchedcategory(logc),
4958                                "setting up default 'category unmatched'");
4959                         CHECKM(ns_log_setdefaultcategory(logc),
4960                                "setting up default 'category default'");
4961                 }
4962
4963                 result = isc_logconfig_use(ns_g_lctx, logc);
4964                 if (result != ISC_R_SUCCESS) {
4965                         isc_logconfig_destroy(&logc);
4966                         CHECKM(result, "installing logging configuration");
4967                 }
4968
4969                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
4970                               NS_LOGMODULE_SERVER, ISC_LOG_DEBUG(1),
4971                               "now using logging configuration from "
4972                               "config file");
4973         }
4974
4975         /*
4976          * Set the default value of the query logging flag depending
4977          * whether a "queries" category has been defined.  This is
4978          * a disgusting hack, but we need to do this for BIND 8
4979          * compatibility.
4980          */
4981         if (first_time) {
4982                 const cfg_obj_t *logobj = NULL;
4983                 const cfg_obj_t *categories = NULL;
4984
4985                 obj = NULL;
4986                 if (ns_config_get(maps, "querylog", &obj) == ISC_R_SUCCESS) {
4987                         server->log_queries = cfg_obj_asboolean(obj);
4988                 } else {
4989
4990                         (void)cfg_map_get(config, "logging", &logobj);
4991                         if (logobj != NULL)
4992                                 (void)cfg_map_get(logobj, "category",
4993                                                   &categories);
4994                         if (categories != NULL) {
4995                                 const cfg_listelt_t *element;
4996                                 for (element = cfg_list_first(categories);
4997                                      element != NULL;
4998                                      element = cfg_list_next(element))
4999                                 {
5000                                         const cfg_obj_t *catobj;
5001                                         const char *str;
5002
5003                                         obj = cfg_listelt_value(element);
5004                                         catobj = cfg_tuple_get(obj, "name");
5005                                         str = cfg_obj_asstring(catobj);
5006                                         if (strcasecmp(str, "queries") == 0)
5007                                                 server->log_queries = ISC_TRUE;
5008                                 }
5009                         }
5010                 }
5011         }
5012
5013
5014         obj = NULL;
5015         if (options != NULL &&
5016             cfg_map_get(options, "memstatistics", &obj) == ISC_R_SUCCESS)
5017                 ns_g_memstatistics = cfg_obj_asboolean(obj);
5018         else
5019                 ns_g_memstatistics =
5020                         ISC_TF((isc_mem_debugging & ISC_MEM_DEBUGRECORD) != 0);
5021
5022         obj = NULL;
5023         if (ns_config_get(maps, "memstatistics-file", &obj) == ISC_R_SUCCESS)
5024                 ns_main_setmemstats(cfg_obj_asstring(obj));
5025         else if (ns_g_memstatistics)
5026                 ns_main_setmemstats("named.memstats");
5027         else
5028                 ns_main_setmemstats(NULL);
5029
5030         obj = NULL;
5031         result = ns_config_get(maps, "statistics-file", &obj);
5032         INSIST(result == ISC_R_SUCCESS);
5033         CHECKM(setstring(server, &server->statsfile, cfg_obj_asstring(obj)),
5034                "strdup");
5035
5036         obj = NULL;
5037         result = ns_config_get(maps, "dump-file", &obj);
5038         INSIST(result == ISC_R_SUCCESS);
5039         CHECKM(setstring(server, &server->dumpfile, cfg_obj_asstring(obj)),
5040                "strdup");
5041
5042         obj = NULL;
5043         result = ns_config_get(maps, "secroots-file", &obj);
5044         INSIST(result == ISC_R_SUCCESS);
5045         CHECKM(setstring(server, &server->secrootsfile, cfg_obj_asstring(obj)),
5046                "strdup");
5047
5048         obj = NULL;
5049         result = ns_config_get(maps, "recursing-file", &obj);
5050         INSIST(result == ISC_R_SUCCESS);
5051         CHECKM(setstring(server, &server->recfile, cfg_obj_asstring(obj)),
5052                "strdup");
5053
5054         obj = NULL;
5055         result = ns_config_get(maps, "version", &obj);
5056         if (result == ISC_R_SUCCESS) {
5057                 CHECKM(setoptstring(server, &server->version, obj), "strdup");
5058                 server->version_set = ISC_TRUE;
5059         } else {
5060                 server->version_set = ISC_FALSE;
5061         }
5062
5063         obj = NULL;
5064         result = ns_config_get(maps, "hostname", &obj);
5065         if (result == ISC_R_SUCCESS) {
5066                 CHECKM(setoptstring(server, &server->hostname, obj), "strdup");
5067                 server->hostname_set = ISC_TRUE;
5068         } else {
5069                 server->hostname_set = ISC_FALSE;
5070         }
5071
5072         obj = NULL;
5073         result = ns_config_get(maps, "server-id", &obj);
5074         server->server_usehostname = ISC_FALSE;
5075         if (result == ISC_R_SUCCESS && cfg_obj_isboolean(obj)) {
5076                 /* The parser translates "hostname" to ISC_TRUE */
5077                 server->server_usehostname = cfg_obj_asboolean(obj);
5078                 result = setstring(server, &server->server_id, NULL);
5079                 RUNTIME_CHECK(result == ISC_R_SUCCESS);
5080         } else if (result == ISC_R_SUCCESS) {
5081                 /* Found a quoted string */
5082                 CHECKM(setoptstring(server, &server->server_id, obj), "strdup");
5083         } else {
5084                 result = setstring(server, &server->server_id, NULL);
5085                 RUNTIME_CHECK(result == ISC_R_SUCCESS);
5086         }
5087
5088         obj = NULL;
5089         result = ns_config_get(maps, "flush-zones-on-shutdown", &obj);
5090         if (result == ISC_R_SUCCESS) {
5091                 server->flushonshutdown = cfg_obj_asboolean(obj);
5092         } else {
5093                 server->flushonshutdown = ISC_FALSE;
5094         }
5095
5096         result = ISC_R_SUCCESS;
5097
5098  cleanup:
5099         if (v4portset != NULL)
5100                 isc_portset_destroy(ns_g_mctx, &v4portset);
5101
5102         if (v6portset != NULL)
5103                 isc_portset_destroy(ns_g_mctx, &v6portset);
5104
5105         if (conf_parser != NULL) {
5106                 if (config != NULL)
5107                         cfg_obj_destroy(conf_parser, &config);
5108                 cfg_parser_destroy(&conf_parser);
5109         }
5110
5111         if (bindkeys_parser != NULL) {
5112                 if (bindkeys  != NULL)
5113                         cfg_obj_destroy(bindkeys_parser, &bindkeys);
5114                 cfg_parser_destroy(&bindkeys_parser);
5115         }
5116
5117         if (view != NULL)
5118                 dns_view_detach(&view);
5119
5120         /*
5121          * This cleans up either the old production view list
5122          * or our temporary list depending on whether they
5123          * were swapped above or not.
5124          */
5125         for (view = ISC_LIST_HEAD(viewlist);
5126              view != NULL;
5127              view = view_next) {
5128                 view_next = ISC_LIST_NEXT(view, link);
5129                 ISC_LIST_UNLINK(viewlist, view, link);
5130                 if (result == ISC_R_SUCCESS &&
5131                     strcmp(view->name, "_bind") != 0)
5132                         (void)dns_zt_apply(view->zonetable, ISC_FALSE,
5133                                            removed, view);
5134                 dns_view_detach(&view);
5135         }
5136
5137         /* Same cleanup for cache list. */
5138         while ((nsc = ISC_LIST_HEAD(cachelist)) != NULL) {
5139                 ISC_LIST_UNLINK(cachelist, nsc, link);
5140                 dns_cache_detach(&nsc->cache);
5141                 isc_mem_put(server->mctx, nsc, sizeof(*nsc));
5142         }
5143
5144         /*
5145          * Adjust the listening interfaces in accordance with the source
5146          * addresses specified in views and zones.
5147          */
5148         if (isc_net_probeipv6() == ISC_R_SUCCESS)
5149                 adjust_interfaces(server, ns_g_mctx);
5150
5151         /* Relinquish exclusive access to configuration data. */
5152         isc_task_endexclusive(server->task);
5153
5154         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
5155                       ISC_LOG_DEBUG(1), "load_configuration: %s",
5156                       isc_result_totext(result));
5157
5158         return (result);
5159 }
5160
5161 static isc_result_t
5162 load_zones(ns_server_t *server, isc_boolean_t stop) {
5163         isc_result_t result;
5164         dns_view_t *view;
5165
5166         result = isc_task_beginexclusive(server->task);
5167         RUNTIME_CHECK(result == ISC_R_SUCCESS);
5168
5169         /*
5170          * Load zone data from disk.
5171          */
5172         for (view = ISC_LIST_HEAD(server->viewlist);
5173              view != NULL;
5174              view = ISC_LIST_NEXT(view, link))
5175         {
5176                 CHECK(dns_view_load(view, stop));
5177                 if (view->managed_keys != NULL)
5178                         CHECK(dns_zone_load(view->managed_keys));
5179         }
5180
5181         /*
5182          * Force zone maintenance.  Do this after loading
5183          * so that we know when we need to force AXFR of
5184          * slave zones whose master files are missing.
5185          */
5186         CHECK(dns_zonemgr_forcemaint(server->zonemgr));
5187  cleanup:
5188         isc_task_endexclusive(server->task);
5189         return (result);
5190 }
5191
5192 static isc_result_t
5193 load_new_zones(ns_server_t *server, isc_boolean_t stop) {
5194         isc_result_t result;
5195         dns_view_t *view;
5196
5197         result = isc_task_beginexclusive(server->task);
5198         RUNTIME_CHECK(result == ISC_R_SUCCESS);
5199
5200         /*
5201          * Load zone data from disk.
5202          */
5203         for (view = ISC_LIST_HEAD(server->viewlist);
5204              view != NULL;
5205              view = ISC_LIST_NEXT(view, link))
5206         {
5207                 CHECK(dns_view_loadnew(view, stop));
5208
5209                 /* Load managed-keys data */
5210                 if (view->managed_keys != NULL)
5211                         CHECK(dns_zone_loadnew(view->managed_keys));
5212         }
5213
5214         /*
5215          * Resume zone XFRs.
5216          */
5217         dns_zonemgr_resumexfrs(server->zonemgr);
5218  cleanup:
5219         isc_task_endexclusive(server->task);
5220         return (result);
5221 }
5222
5223 static void
5224 run_server(isc_task_t *task, isc_event_t *event) {
5225         isc_result_t result;
5226         ns_server_t *server = (ns_server_t *)event->ev_arg;
5227
5228         INSIST(task == server->task);
5229
5230         isc_event_free(&event);
5231
5232         CHECKFATAL(dns_dispatchmgr_create(ns_g_mctx, ns_g_entropy,
5233                                           &ns_g_dispatchmgr),
5234                    "creating dispatch manager");
5235
5236         dns_dispatchmgr_setstats(ns_g_dispatchmgr, server->resolverstats);
5237
5238         CHECKFATAL(ns_interfacemgr_create(ns_g_mctx, ns_g_taskmgr,
5239                                           ns_g_socketmgr, ns_g_dispatchmgr,
5240                                           &server->interfacemgr),
5241                    "creating interface manager");
5242
5243         CHECKFATAL(isc_timer_create(ns_g_timermgr, isc_timertype_inactive,
5244                                     NULL, NULL, server->task,
5245                                     interface_timer_tick,
5246                                     server, &server->interface_timer),
5247                    "creating interface timer");
5248
5249         CHECKFATAL(isc_timer_create(ns_g_timermgr, isc_timertype_inactive,
5250                                     NULL, NULL, server->task,
5251                                     heartbeat_timer_tick,
5252                                     server, &server->heartbeat_timer),
5253                    "creating heartbeat timer");
5254
5255         CHECKFATAL(isc_timer_create(ns_g_timermgr, isc_timertype_inactive,
5256                                     NULL, NULL, server->task, pps_timer_tick,
5257                                     server, &server->pps_timer),
5258                    "creating pps timer");
5259
5260         CHECKFATAL(cfg_parser_create(ns_g_mctx, NULL, &ns_g_parser),
5261                    "creating default configuration parser");
5262
5263         if (ns_g_lwresdonly)
5264                 CHECKFATAL(load_configuration(lwresd_g_conffile, server,
5265                                               ISC_TRUE),
5266                            "loading configuration");
5267         else
5268                 CHECKFATAL(load_configuration(ns_g_conffile, server, ISC_TRUE),
5269                            "loading configuration");
5270
5271         isc_hash_init();
5272
5273         CHECKFATAL(load_zones(server, ISC_FALSE), "loading zones");
5274
5275         ns_os_started();
5276         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
5277                       ISC_LOG_NOTICE, "running");
5278 }
5279
5280 void
5281 ns_server_flushonshutdown(ns_server_t *server, isc_boolean_t flush) {
5282
5283         REQUIRE(NS_SERVER_VALID(server));
5284
5285         server->flushonshutdown = flush;
5286 }
5287
5288 static void
5289 shutdown_server(isc_task_t *task, isc_event_t *event) {
5290         isc_result_t result;
5291         dns_view_t *view, *view_next;
5292         ns_server_t *server = (ns_server_t *)event->ev_arg;
5293         isc_boolean_t flush = server->flushonshutdown;
5294         ns_cache_t *nsc;
5295
5296         UNUSED(task);
5297         INSIST(task == server->task);
5298
5299         result = isc_task_beginexclusive(server->task);
5300         RUNTIME_CHECK(result == ISC_R_SUCCESS);
5301
5302         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
5303                       ISC_LOG_INFO, "shutting down%s",
5304                       flush ? ": flushing changes" : "");
5305
5306         ns_statschannels_shutdown(server);
5307         ns_controls_shutdown(server->controls);
5308         end_reserved_dispatches(server, ISC_TRUE);
5309         cleanup_session_key(server, server->mctx);
5310
5311         if (ns_g_aclconfctx != NULL)
5312                 cfg_aclconfctx_detach(&ns_g_aclconfctx);
5313
5314         cfg_obj_destroy(ns_g_parser, &ns_g_config);
5315         cfg_parser_destroy(&ns_g_parser);
5316
5317         for (view = ISC_LIST_HEAD(server->viewlist);
5318              view != NULL;
5319              view = view_next) {
5320                 view_next = ISC_LIST_NEXT(view, link);
5321                 ISC_LIST_UNLINK(server->viewlist, view, link);
5322                 if (flush)
5323                         dns_view_flushanddetach(&view);
5324                 else
5325                         dns_view_detach(&view);
5326         }
5327
5328         while ((nsc = ISC_LIST_HEAD(server->cachelist)) != NULL) {
5329                 ISC_LIST_UNLINK(server->cachelist, nsc, link);
5330                 dns_cache_detach(&nsc->cache);
5331                 isc_mem_put(server->mctx, nsc, sizeof(*nsc));
5332         }
5333
5334         isc_timer_detach(&server->interface_timer);
5335         isc_timer_detach(&server->heartbeat_timer);
5336         isc_timer_detach(&server->pps_timer);
5337
5338         ns_interfacemgr_shutdown(server->interfacemgr);
5339         ns_interfacemgr_detach(&server->interfacemgr);
5340
5341         dns_dispatchmgr_destroy(&ns_g_dispatchmgr);
5342
5343         dns_zonemgr_shutdown(server->zonemgr);
5344
5345         if (ns_g_sessionkey != NULL) {
5346                 dns_tsigkey_detach(&ns_g_sessionkey);
5347                 dns_name_free(&ns_g_sessionkeyname, server->mctx);
5348         }
5349
5350         if (server->blackholeacl != NULL)
5351                 dns_acl_detach(&server->blackholeacl);
5352
5353         dns_db_detach(&server->in_roothints);
5354
5355         isc_task_endexclusive(server->task);
5356
5357         isc_task_detach(&server->task);
5358
5359         isc_event_free(&event);
5360 }
5361
5362 void
5363 ns_server_create(isc_mem_t *mctx, ns_server_t **serverp) {
5364         isc_result_t result;
5365         ns_server_t *server = isc_mem_get(mctx, sizeof(*server));
5366
5367         if (server == NULL)
5368                 fatal("allocating server object", ISC_R_NOMEMORY);
5369
5370         server->mctx = mctx;
5371         server->task = NULL;
5372
5373         /* Initialize configuration data with default values. */
5374
5375         result = isc_quota_init(&server->xfroutquota, 10);
5376         RUNTIME_CHECK(result == ISC_R_SUCCESS);
5377         result = isc_quota_init(&server->tcpquota, 10);
5378         RUNTIME_CHECK(result == ISC_R_SUCCESS);
5379         result = isc_quota_init(&server->recursionquota, 100);
5380         RUNTIME_CHECK(result == ISC_R_SUCCESS);
5381
5382         result = dns_aclenv_init(mctx, &server->aclenv);
5383         RUNTIME_CHECK(result == ISC_R_SUCCESS);
5384
5385         /* Initialize server data structures. */
5386         server->zonemgr = NULL;
5387         server->interfacemgr = NULL;
5388         ISC_LIST_INIT(server->viewlist);
5389         server->in_roothints = NULL;
5390         server->blackholeacl = NULL;
5391
5392         CHECKFATAL(dns_rootns_create(mctx, dns_rdataclass_in, NULL,
5393                                      &server->in_roothints),
5394                    "setting up root hints");
5395
5396         CHECKFATAL(isc_mutex_init(&server->reload_event_lock),
5397                    "initializing reload event lock");
5398         server->reload_event =
5399                 isc_event_allocate(ns_g_mctx, server,
5400                                    NS_EVENT_RELOAD,
5401                                    ns_server_reload,
5402                                    server,
5403                                    sizeof(isc_event_t));
5404         CHECKFATAL(server->reload_event == NULL ?
5405                    ISC_R_NOMEMORY : ISC_R_SUCCESS,
5406                    "allocating reload event");
5407
5408         CHECKFATAL(dst_lib_init2(ns_g_mctx, ns_g_entropy,
5409                                  ns_g_engine, ISC_ENTROPY_GOODONLY),
5410                    "initializing DST");
5411
5412         server->tkeyctx = NULL;
5413         CHECKFATAL(dns_tkeyctx_create(ns_g_mctx, ns_g_entropy,
5414                                       &server->tkeyctx),
5415                    "creating TKEY context");
5416
5417         /*
5418          * Setup the server task, which is responsible for coordinating
5419          * startup and shutdown of the server.
5420          */
5421         CHECKFATAL(isc_task_create(ns_g_taskmgr, 0, &server->task),
5422                    "creating server task");
5423         isc_task_setname(server->task, "server", server);
5424         CHECKFATAL(isc_task_onshutdown(server->task, shutdown_server, server),
5425                    "isc_task_onshutdown");
5426         CHECKFATAL(isc_app_onrun(ns_g_mctx, server->task, run_server, server),
5427                    "isc_app_onrun");
5428
5429         server->interface_timer = NULL;
5430         server->heartbeat_timer = NULL;
5431         server->pps_timer = NULL;
5432
5433         server->interface_interval = 0;
5434         server->heartbeat_interval = 0;
5435
5436         CHECKFATAL(dns_zonemgr_create(ns_g_mctx, ns_g_taskmgr, ns_g_timermgr,
5437                                       ns_g_socketmgr, &server->zonemgr),
5438                    "dns_zonemgr_create");
5439         CHECKFATAL(dns_zonemgr_setsize(server->zonemgr, 1000),
5440                    "dns_zonemgr_setsize");
5441
5442         server->statsfile = isc_mem_strdup(server->mctx, "named.stats");
5443         CHECKFATAL(server->statsfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
5444                    "isc_mem_strdup");
5445         server->nsstats = NULL;
5446         server->rcvquerystats = NULL;
5447         server->opcodestats = NULL;
5448         server->zonestats = NULL;
5449         server->resolverstats = NULL;
5450         server->sockstats = NULL;
5451         CHECKFATAL(isc_stats_create(server->mctx, &server->sockstats,
5452                                     isc_sockstatscounter_max),
5453                    "isc_stats_create");
5454         isc_socketmgr_setstats(ns_g_socketmgr, server->sockstats);
5455
5456         server->bindkeysfile = isc_mem_strdup(server->mctx, "bind.keys");
5457         CHECKFATAL(server->bindkeysfile == NULL ? ISC_R_NOMEMORY :
5458                                                   ISC_R_SUCCESS,
5459                    "isc_mem_strdup");
5460
5461         server->dumpfile = isc_mem_strdup(server->mctx, "named_dump.db");
5462         CHECKFATAL(server->dumpfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
5463                    "isc_mem_strdup");
5464
5465         server->secrootsfile = isc_mem_strdup(server->mctx, "named.secroots");
5466         CHECKFATAL(server->secrootsfile == NULL ? ISC_R_NOMEMORY :
5467                                                   ISC_R_SUCCESS,
5468                    "isc_mem_strdup");
5469
5470         server->recfile = isc_mem_strdup(server->mctx, "named.recursing");
5471         CHECKFATAL(server->recfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
5472                    "isc_mem_strdup");
5473
5474         server->hostname_set = ISC_FALSE;
5475         server->hostname = NULL;
5476         server->version_set = ISC_FALSE;
5477         server->version = NULL;
5478         server->server_usehostname = ISC_FALSE;
5479         server->server_id = NULL;
5480
5481         CHECKFATAL(isc_stats_create(ns_g_mctx, &server->nsstats,
5482                                     dns_nsstatscounter_max),
5483                    "dns_stats_create (server)");
5484
5485         CHECKFATAL(dns_rdatatypestats_create(ns_g_mctx,
5486                                              &server->rcvquerystats),
5487                    "dns_stats_create (rcvquery)");
5488
5489         CHECKFATAL(dns_opcodestats_create(ns_g_mctx, &server->opcodestats),
5490                    "dns_stats_create (opcode)");
5491
5492         CHECKFATAL(isc_stats_create(ns_g_mctx, &server->zonestats,
5493                                     dns_zonestatscounter_max),
5494                    "dns_stats_create (zone)");
5495
5496         CHECKFATAL(isc_stats_create(ns_g_mctx, &server->resolverstats,
5497                                     dns_resstatscounter_max),
5498                    "dns_stats_create (resolver)");
5499
5500         server->flushonshutdown = ISC_FALSE;
5501         server->log_queries = ISC_FALSE;
5502
5503         server->controls = NULL;
5504         CHECKFATAL(ns_controls_create(server, &server->controls),
5505                    "ns_controls_create");
5506         server->dispatchgen = 0;
5507         ISC_LIST_INIT(server->dispatches);
5508
5509         ISC_LIST_INIT(server->statschannels);
5510
5511         ISC_LIST_INIT(server->cachelist);
5512
5513         server->sessionkey = NULL;
5514         server->session_keyfile = NULL;
5515         server->session_keyname = NULL;
5516         server->session_keyalg = DST_ALG_UNKNOWN;
5517         server->session_keybits = 0;
5518
5519         server->magic = NS_SERVER_MAGIC;
5520         *serverp = server;
5521 }
5522
5523 void
5524 ns_server_destroy(ns_server_t **serverp) {
5525         ns_server_t *server = *serverp;
5526         REQUIRE(NS_SERVER_VALID(server));
5527
5528         ns_controls_destroy(&server->controls);
5529
5530         isc_stats_detach(&server->nsstats);
5531         dns_stats_detach(&server->rcvquerystats);
5532         dns_stats_detach(&server->opcodestats);
5533         isc_stats_detach(&server->zonestats);
5534         isc_stats_detach(&server->resolverstats);
5535         isc_stats_detach(&server->sockstats);
5536
5537         isc_mem_free(server->mctx, server->statsfile);
5538         isc_mem_free(server->mctx, server->bindkeysfile);
5539         isc_mem_free(server->mctx, server->dumpfile);
5540         isc_mem_free(server->mctx, server->secrootsfile);
5541         isc_mem_free(server->mctx, server->recfile);
5542
5543         if (server->version != NULL)
5544                 isc_mem_free(server->mctx, server->version);
5545         if (server->hostname != NULL)
5546                 isc_mem_free(server->mctx, server->hostname);
5547         if (server->server_id != NULL)
5548                 isc_mem_free(server->mctx, server->server_id);
5549
5550         if (server->zonemgr != NULL)
5551                 dns_zonemgr_detach(&server->zonemgr);
5552
5553         if (server->tkeyctx != NULL)
5554                 dns_tkeyctx_destroy(&server->tkeyctx);
5555
5556         dst_lib_destroy();
5557
5558         isc_event_free(&server->reload_event);
5559
5560         INSIST(ISC_LIST_EMPTY(server->viewlist));
5561         INSIST(ISC_LIST_EMPTY(server->cachelist));
5562
5563         dns_aclenv_destroy(&server->aclenv);
5564
5565         isc_quota_destroy(&server->recursionquota);
5566         isc_quota_destroy(&server->tcpquota);
5567         isc_quota_destroy(&server->xfroutquota);
5568
5569         server->magic = 0;
5570         isc_mem_put(server->mctx, server, sizeof(*server));
5571         *serverp = NULL;
5572 }
5573
5574 static void
5575 fatal(const char *msg, isc_result_t result) {
5576         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
5577                       ISC_LOG_CRITICAL, "%s: %s", msg,
5578                       isc_result_totext(result));
5579         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
5580                       ISC_LOG_CRITICAL, "exiting (due to fatal error)");
5581         exit(1);
5582 }
5583
5584 static void
5585 start_reserved_dispatches(ns_server_t *server) {
5586
5587         REQUIRE(NS_SERVER_VALID(server));
5588
5589         server->dispatchgen++;
5590 }
5591
5592 static void
5593 end_reserved_dispatches(ns_server_t *server, isc_boolean_t all) {
5594         ns_dispatch_t *dispatch, *nextdispatch;
5595
5596         REQUIRE(NS_SERVER_VALID(server));
5597
5598         for (dispatch = ISC_LIST_HEAD(server->dispatches);
5599              dispatch != NULL;
5600              dispatch = nextdispatch) {
5601                 nextdispatch = ISC_LIST_NEXT(dispatch, link);
5602                 if (!all && server->dispatchgen == dispatch-> dispatchgen)
5603                         continue;
5604                 ISC_LIST_UNLINK(server->dispatches, dispatch, link);
5605                 dns_dispatch_detach(&dispatch->dispatch);
5606                 isc_mem_put(server->mctx, dispatch, sizeof(*dispatch));
5607         }
5608 }
5609
5610 void
5611 ns_add_reserved_dispatch(ns_server_t *server, const isc_sockaddr_t *addr) {
5612         ns_dispatch_t *dispatch;
5613         in_port_t port;
5614         char addrbuf[ISC_SOCKADDR_FORMATSIZE];
5615         isc_result_t result;
5616         unsigned int attrs, attrmask;
5617
5618         REQUIRE(NS_SERVER_VALID(server));
5619
5620         port = isc_sockaddr_getport(addr);
5621         if (port == 0 || port >= 1024)
5622                 return;
5623
5624         for (dispatch = ISC_LIST_HEAD(server->dispatches);
5625              dispatch != NULL;
5626              dispatch = ISC_LIST_NEXT(dispatch, link)) {
5627                 if (isc_sockaddr_equal(&dispatch->addr, addr))
5628                         break;
5629         }
5630         if (dispatch != NULL) {
5631                 dispatch->dispatchgen = server->dispatchgen;
5632                 return;
5633         }
5634
5635         dispatch = isc_mem_get(server->mctx, sizeof(*dispatch));
5636         if (dispatch == NULL) {
5637                 result = ISC_R_NOMEMORY;
5638                 goto cleanup;
5639         }
5640
5641         dispatch->addr = *addr;
5642         dispatch->dispatchgen = server->dispatchgen;
5643         dispatch->dispatch = NULL;
5644
5645         attrs = 0;
5646         attrs |= DNS_DISPATCHATTR_UDP;
5647         switch (isc_sockaddr_pf(addr)) {
5648         case AF_INET:
5649                 attrs |= DNS_DISPATCHATTR_IPV4;
5650                 break;
5651         case AF_INET6:
5652                 attrs |= DNS_DISPATCHATTR_IPV6;
5653                 break;
5654         default:
5655                 result = ISC_R_NOTIMPLEMENTED;
5656                 goto cleanup;
5657         }
5658         attrmask = 0;
5659         attrmask |= DNS_DISPATCHATTR_UDP;
5660         attrmask |= DNS_DISPATCHATTR_TCP;
5661         attrmask |= DNS_DISPATCHATTR_IPV4;
5662         attrmask |= DNS_DISPATCHATTR_IPV6;
5663
5664         result = dns_dispatch_getudp(ns_g_dispatchmgr, ns_g_socketmgr,
5665                                      ns_g_taskmgr, &dispatch->addr, 4096,
5666                                      1000, 32768, 16411, 16433,
5667                                      attrs, attrmask, &dispatch->dispatch);
5668         if (result != ISC_R_SUCCESS)
5669                 goto cleanup;
5670
5671         ISC_LIST_INITANDPREPEND(server->dispatches, dispatch, link);
5672
5673         return;
5674
5675  cleanup:
5676         if (dispatch != NULL)
5677                 isc_mem_put(server->mctx, dispatch, sizeof(*dispatch));
5678         isc_sockaddr_format(addr, addrbuf, sizeof(addrbuf));
5679         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5680                       NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
5681                       "unable to create dispatch for reserved port %s: %s",
5682                       addrbuf, isc_result_totext(result));
5683 }
5684
5685
5686 static isc_result_t
5687 loadconfig(ns_server_t *server) {
5688         isc_result_t result;
5689         start_reserved_dispatches(server);
5690         result = load_configuration(ns_g_lwresdonly ?
5691                                     lwresd_g_conffile : ns_g_conffile,
5692                                     server, ISC_FALSE);
5693         if (result == ISC_R_SUCCESS) {
5694                 end_reserved_dispatches(server, ISC_FALSE);
5695                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5696                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
5697                               "reloading configuration succeeded");
5698         } else {
5699                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5700                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
5701                               "reloading configuration failed: %s",
5702                               isc_result_totext(result));
5703         }
5704         return (result);
5705 }
5706
5707 static isc_result_t
5708 reload(ns_server_t *server) {
5709         isc_result_t result;
5710         CHECK(loadconfig(server));
5711
5712         result = load_zones(server, ISC_FALSE);
5713         if (result == ISC_R_SUCCESS)
5714                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5715                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
5716                               "reloading zones succeeded");
5717         else
5718                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5719                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
5720                               "reloading zones failed: %s",
5721                               isc_result_totext(result));
5722
5723  cleanup:
5724         return (result);
5725 }
5726
5727 static void
5728 reconfig(ns_server_t *server) {
5729         isc_result_t result;
5730         CHECK(loadconfig(server));
5731
5732         result = load_new_zones(server, ISC_FALSE);
5733         if (result == ISC_R_SUCCESS)
5734                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5735                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
5736                               "any newly configured zones are now loaded");
5737         else
5738                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5739                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
5740                               "loading new zones failed: %s",
5741                               isc_result_totext(result));
5742
5743  cleanup: ;
5744 }
5745
5746 /*
5747  * Handle a reload event (from SIGHUP).
5748  */
5749 static void
5750 ns_server_reload(isc_task_t *task, isc_event_t *event) {
5751         ns_server_t *server = (ns_server_t *)event->ev_arg;
5752
5753         INSIST(task = server->task);
5754         UNUSED(task);
5755
5756         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
5757                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
5758                       "received SIGHUP signal to reload zones");
5759         (void)reload(server);
5760
5761         LOCK(&server->reload_event_lock);
5762         INSIST(server->reload_event == NULL);
5763         server->reload_event = event;
5764         UNLOCK(&server->reload_event_lock);
5765 }
5766
5767 void
5768 ns_server_reloadwanted(ns_server_t *server) {
5769         LOCK(&server->reload_event_lock);
5770         if (server->reload_event != NULL)
5771                 isc_task_send(server->task, &server->reload_event);
5772         UNLOCK(&server->reload_event_lock);
5773 }
5774
5775 static char *
5776 next_token(char **stringp, const char *delim) {
5777         char *res;
5778
5779         do {
5780                 res = strsep(stringp, delim);
5781                 if (res == NULL)
5782                         break;
5783         } while (*res == '\0');
5784         return (res);
5785 }
5786
5787 /*
5788  * Find the zone specified in the control channel command 'args',
5789  * if any.  If a zone is specified, point '*zonep' at it, otherwise
5790  * set '*zonep' to NULL.
5791  */
5792 static isc_result_t
5793 zone_from_args(ns_server_t *server, char *args, dns_zone_t **zonep,
5794                const char **zonename)
5795 {
5796         char *input, *ptr;
5797         const char *zonetxt;
5798         char *classtxt;
5799         const char *viewtxt = NULL;
5800         dns_fixedname_t name;
5801         isc_result_t result;
5802         isc_buffer_t buf;
5803         dns_view_t *view = NULL;
5804         dns_rdataclass_t rdclass;
5805
5806         REQUIRE(zonep != NULL && *zonep == NULL);
5807
5808         input = args;
5809
5810         /* Skip the command name. */
5811         ptr = next_token(&input, " \t");
5812         if (ptr == NULL)
5813                 return (ISC_R_UNEXPECTEDEND);
5814
5815         /* Look for the zone name. */
5816         zonetxt = next_token(&input, " \t");
5817         if (zonetxt == NULL)
5818                 return (ISC_R_SUCCESS);
5819         if (zonename)
5820                 *zonename = zonetxt;
5821
5822         /* Look for the optional class name. */
5823         classtxt = next_token(&input, " \t");
5824         if (classtxt != NULL) {
5825                 /* Look for the optional view name. */
5826                 viewtxt = next_token(&input, " \t");
5827         }
5828
5829         isc_buffer_init(&buf, zonetxt, strlen(zonetxt));
5830         isc_buffer_add(&buf, strlen(zonetxt));
5831         dns_fixedname_init(&name);
5832         result = dns_name_fromtext(dns_fixedname_name(&name),
5833                                    &buf, dns_rootname, 0, NULL);
5834         if (result != ISC_R_SUCCESS)
5835                 goto fail1;
5836
5837         if (classtxt != NULL) {
5838                 isc_textregion_t r;
5839                 r.base = classtxt;
5840                 r.length = strlen(classtxt);
5841                 result = dns_rdataclass_fromtext(&rdclass, &r);
5842                 if (result != ISC_R_SUCCESS)
5843                         goto fail1;
5844         } else
5845                 rdclass = dns_rdataclass_in;
5846
5847         if (viewtxt == NULL) {
5848                 result = dns_viewlist_findzone(&server->viewlist,
5849                                                dns_fixedname_name(&name),
5850                                                ISC_TF(classtxt == NULL),
5851                                                rdclass, zonep);
5852         } else {
5853                 result = dns_viewlist_find(&server->viewlist, viewtxt,
5854                                            rdclass, &view);
5855                 if (result != ISC_R_SUCCESS)
5856                         goto fail1;
5857
5858                 result = dns_zt_find(view->zonetable, dns_fixedname_name(&name),
5859                                      0, NULL, zonep);
5860                 dns_view_detach(&view);
5861         }
5862
5863         /* Partial match? */
5864         if (result != ISC_R_SUCCESS && *zonep != NULL)
5865                 dns_zone_detach(zonep);
5866         if (result == DNS_R_PARTIALMATCH)
5867                 result = ISC_R_NOTFOUND;
5868  fail1:
5869         return (result);
5870 }
5871
5872 /*
5873  * Act on a "retransfer" command from the command channel.
5874  */
5875 isc_result_t
5876 ns_server_retransfercommand(ns_server_t *server, char *args) {
5877         isc_result_t result;
5878         dns_zone_t *zone = NULL;
5879         dns_zonetype_t type;
5880
5881         result = zone_from_args(server, args, &zone, NULL);
5882         if (result != ISC_R_SUCCESS)
5883                 return (result);
5884         if (zone == NULL)
5885                 return (ISC_R_UNEXPECTEDEND);
5886         type = dns_zone_gettype(zone);
5887         if (type == dns_zone_slave || type == dns_zone_stub)
5888                 dns_zone_forcereload(zone);
5889         else
5890                 result = ISC_R_NOTFOUND;
5891         dns_zone_detach(&zone);
5892         return (result);
5893 }
5894
5895 /*
5896  * Act on a "reload" command from the command channel.
5897  */
5898 isc_result_t
5899 ns_server_reloadcommand(ns_server_t *server, char *args, isc_buffer_t *text) {
5900         isc_result_t result;
5901         dns_zone_t *zone = NULL;
5902         dns_zonetype_t type;
5903         const char *msg = NULL;
5904
5905         result = zone_from_args(server, args, &zone, NULL);
5906         if (result != ISC_R_SUCCESS)
5907                 return (result);
5908         if (zone == NULL) {
5909                 result = reload(server);
5910                 if (result == ISC_R_SUCCESS)
5911                         msg = "server reload successful";
5912         } else {
5913                 type = dns_zone_gettype(zone);
5914                 if (type == dns_zone_slave || type == dns_zone_stub) {
5915                         dns_zone_refresh(zone);
5916                         dns_zone_detach(&zone);
5917                         msg = "zone refresh queued";
5918                 } else {
5919                         result = dns_zone_load(zone);
5920                         dns_zone_detach(&zone);
5921                         switch (result) {
5922                         case ISC_R_SUCCESS:
5923                                  msg = "zone reload successful";
5924                                  break;
5925                         case DNS_R_CONTINUE:
5926                                 msg = "zone reload queued";
5927                                 result = ISC_R_SUCCESS;
5928                                 break;
5929                         case DNS_R_UPTODATE:
5930                                 msg = "zone reload up-to-date";
5931                                 result = ISC_R_SUCCESS;
5932                                 break;
5933                         default:
5934                                 /* failure message will be generated by rndc */
5935                                 break;
5936                         }
5937                 }
5938         }
5939         if (msg != NULL && strlen(msg) < isc_buffer_availablelength(text))
5940                 isc_buffer_putmem(text, (const unsigned char *)msg,
5941                                   strlen(msg) + 1);
5942         return (result);
5943 }
5944
5945 /*
5946  * Act on a "reconfig" command from the command channel.
5947  */
5948 isc_result_t
5949 ns_server_reconfigcommand(ns_server_t *server, char *args) {
5950         UNUSED(args);
5951
5952         reconfig(server);
5953         return (ISC_R_SUCCESS);
5954 }
5955
5956 /*
5957  * Act on a "notify" command from the command channel.
5958  */
5959 isc_result_t
5960 ns_server_notifycommand(ns_server_t *server, char *args, isc_buffer_t *text) {
5961         isc_result_t result;
5962         dns_zone_t *zone = NULL;
5963         const unsigned char msg[] = "zone notify queued";
5964
5965         result = zone_from_args(server, args, &zone, NULL);
5966         if (result != ISC_R_SUCCESS)
5967                 return (result);
5968         if (zone == NULL)
5969                 return (ISC_R_UNEXPECTEDEND);
5970
5971         dns_zone_notify(zone);
5972         dns_zone_detach(&zone);
5973         if (sizeof(msg) <= isc_buffer_availablelength(text))
5974                 isc_buffer_putmem(text, msg, sizeof(msg));
5975
5976         return (ISC_R_SUCCESS);
5977 }
5978
5979 /*
5980  * Act on a "refresh" command from the command channel.
5981  */
5982 isc_result_t
5983 ns_server_refreshcommand(ns_server_t *server, char *args, isc_buffer_t *text) {
5984         isc_result_t result;
5985         dns_zone_t *zone = NULL;
5986         const unsigned char msg1[] = "zone refresh queued";
5987         const unsigned char msg2[] = "not a slave or stub zone";
5988         dns_zonetype_t type;
5989
5990         result = zone_from_args(server, args, &zone, NULL);
5991         if (result != ISC_R_SUCCESS)
5992                 return (result);
5993         if (zone == NULL)
5994                 return (ISC_R_UNEXPECTEDEND);
5995
5996         type = dns_zone_gettype(zone);
5997         if (type == dns_zone_slave || type == dns_zone_stub) {
5998                 dns_zone_refresh(zone);
5999                 dns_zone_detach(&zone);
6000                 if (sizeof(msg1) <= isc_buffer_availablelength(text))
6001                         isc_buffer_putmem(text, msg1, sizeof(msg1));
6002                 return (ISC_R_SUCCESS);
6003         }
6004
6005         dns_zone_detach(&zone);
6006         if (sizeof(msg2) <= isc_buffer_availablelength(text))
6007                 isc_buffer_putmem(text, msg2, sizeof(msg2));
6008         return (ISC_R_FAILURE);
6009 }
6010
6011 isc_result_t
6012 ns_server_togglequerylog(ns_server_t *server) {
6013         server->log_queries = server->log_queries ? ISC_FALSE : ISC_TRUE;
6014
6015         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6016                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6017                       "query logging is now %s",
6018                       server->log_queries ? "on" : "off");
6019         return (ISC_R_SUCCESS);
6020 }
6021
6022 static isc_result_t
6023 ns_listenlist_fromconfig(const cfg_obj_t *listenlist, const cfg_obj_t *config,
6024                          cfg_aclconfctx_t *actx,
6025                          isc_mem_t *mctx, ns_listenlist_t **target)
6026 {
6027         isc_result_t result;
6028         const cfg_listelt_t *element;
6029         ns_listenlist_t *dlist = NULL;
6030
6031         REQUIRE(target != NULL && *target == NULL);
6032
6033         result = ns_listenlist_create(mctx, &dlist);
6034         if (result != ISC_R_SUCCESS)
6035                 return (result);
6036
6037         for (element = cfg_list_first(listenlist);
6038              element != NULL;
6039              element = cfg_list_next(element))
6040         {
6041                 ns_listenelt_t *delt = NULL;
6042                 const cfg_obj_t *listener = cfg_listelt_value(element);
6043                 result = ns_listenelt_fromconfig(listener, config, actx,
6044                                                  mctx, &delt);
6045                 if (result != ISC_R_SUCCESS)
6046                         goto cleanup;
6047                 ISC_LIST_APPEND(dlist->elts, delt, link);
6048         }
6049         *target = dlist;
6050         return (ISC_R_SUCCESS);
6051
6052  cleanup:
6053         ns_listenlist_detach(&dlist);
6054         return (result);
6055 }
6056
6057 /*
6058  * Create a listen list from the corresponding configuration
6059  * data structure.
6060  */
6061 static isc_result_t
6062 ns_listenelt_fromconfig(const cfg_obj_t *listener, const cfg_obj_t *config,
6063                         cfg_aclconfctx_t *actx,
6064                         isc_mem_t *mctx, ns_listenelt_t **target)
6065 {
6066         isc_result_t result;
6067         const cfg_obj_t *portobj;
6068         in_port_t port;
6069         ns_listenelt_t *delt = NULL;
6070         REQUIRE(target != NULL && *target == NULL);
6071
6072         portobj = cfg_tuple_get(listener, "port");
6073         if (!cfg_obj_isuint32(portobj)) {
6074                 if (ns_g_port != 0) {
6075                         port = ns_g_port;
6076                 } else {
6077                         result = ns_config_getport(config, &port);
6078                         if (result != ISC_R_SUCCESS)
6079                                 return (result);
6080                 }
6081         } else {
6082                 if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
6083                         cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
6084                                     "port value '%u' is out of range",
6085                                     cfg_obj_asuint32(portobj));
6086                         return (ISC_R_RANGE);
6087                 }
6088                 port = (in_port_t)cfg_obj_asuint32(portobj);
6089         }
6090
6091         result = ns_listenelt_create(mctx, port, NULL, &delt);
6092         if (result != ISC_R_SUCCESS)
6093                 return (result);
6094
6095         result = cfg_acl_fromconfig(cfg_tuple_get(listener, "acl"),
6096                                    config, ns_g_lctx, actx, mctx, 0,
6097                                    &delt->acl);
6098         if (result != ISC_R_SUCCESS) {
6099                 ns_listenelt_destroy(delt);
6100                 return (result);
6101         }
6102         *target = delt;
6103         return (ISC_R_SUCCESS);
6104 }
6105
6106 isc_result_t
6107 ns_server_dumpstats(ns_server_t *server) {
6108         isc_result_t result;
6109         FILE *fp = NULL;
6110
6111         CHECKMF(isc_stdio_open(server->statsfile, "a", &fp),
6112                 "could not open statistics dump file", server->statsfile);
6113
6114         result = ns_stats_dump(server, fp);
6115
6116  cleanup:
6117         if (fp != NULL)
6118                 (void)isc_stdio_close(fp);
6119         if (result == ISC_R_SUCCESS)
6120                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6121                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6122                               "dumpstats complete");
6123         else
6124                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6125                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6126                               "dumpstats failed: %s",
6127                               dns_result_totext(result));
6128         return (result);
6129 }
6130
6131 static isc_result_t
6132 add_zone_tolist(dns_zone_t *zone, void *uap) {
6133         struct dumpcontext *dctx = uap;
6134         struct zonelistentry *zle;
6135
6136         zle = isc_mem_get(dctx->mctx, sizeof *zle);
6137         if (zle ==  NULL)
6138                 return (ISC_R_NOMEMORY);
6139         zle->zone = NULL;
6140         dns_zone_attach(zone, &zle->zone);
6141         ISC_LINK_INIT(zle, link);
6142         ISC_LIST_APPEND(ISC_LIST_TAIL(dctx->viewlist)->zonelist, zle, link);
6143         return (ISC_R_SUCCESS);
6144 }
6145
6146 static isc_result_t
6147 add_view_tolist(struct dumpcontext *dctx, dns_view_t *view) {
6148         struct viewlistentry *vle;
6149         isc_result_t result = ISC_R_SUCCESS;
6150
6151         /*
6152          * Prevent duplicate views.
6153          */
6154         for (vle = ISC_LIST_HEAD(dctx->viewlist);
6155              vle != NULL;
6156              vle = ISC_LIST_NEXT(vle, link))
6157                 if (vle->view == view)
6158                         return (ISC_R_SUCCESS);
6159
6160         vle = isc_mem_get(dctx->mctx, sizeof *vle);
6161         if (vle == NULL)
6162                 return (ISC_R_NOMEMORY);
6163         vle->view = NULL;
6164         dns_view_attach(view, &vle->view);
6165         ISC_LINK_INIT(vle, link);
6166         ISC_LIST_INIT(vle->zonelist);
6167         ISC_LIST_APPEND(dctx->viewlist, vle, link);
6168         if (dctx->dumpzones)
6169                 result = dns_zt_apply(view->zonetable, ISC_TRUE,
6170                                       add_zone_tolist, dctx);
6171         return (result);
6172 }
6173
6174 static void
6175 dumpcontext_destroy(struct dumpcontext *dctx) {
6176         struct viewlistentry *vle;
6177         struct zonelistentry *zle;
6178
6179         vle = ISC_LIST_HEAD(dctx->viewlist);
6180         while (vle != NULL) {
6181                 ISC_LIST_UNLINK(dctx->viewlist, vle, link);
6182                 zle = ISC_LIST_HEAD(vle->zonelist);
6183                 while (zle != NULL) {
6184                         ISC_LIST_UNLINK(vle->zonelist, zle, link);
6185                         dns_zone_detach(&zle->zone);
6186                         isc_mem_put(dctx->mctx, zle, sizeof *zle);
6187                         zle = ISC_LIST_HEAD(vle->zonelist);
6188                 }
6189                 dns_view_detach(&vle->view);
6190                 isc_mem_put(dctx->mctx, vle, sizeof *vle);
6191                 vle = ISC_LIST_HEAD(dctx->viewlist);
6192         }
6193         if (dctx->version != NULL)
6194                 dns_db_closeversion(dctx->db, &dctx->version, ISC_FALSE);
6195         if (dctx->db != NULL)
6196                 dns_db_detach(&dctx->db);
6197         if (dctx->cache != NULL)
6198                 dns_db_detach(&dctx->cache);
6199         if (dctx->task != NULL)
6200                 isc_task_detach(&dctx->task);
6201         if (dctx->fp != NULL)
6202                 (void)isc_stdio_close(dctx->fp);
6203         if (dctx->mdctx != NULL)
6204                 dns_dumpctx_detach(&dctx->mdctx);
6205         isc_mem_put(dctx->mctx, dctx, sizeof *dctx);
6206 }
6207
6208 static void
6209 dumpdone(void *arg, isc_result_t result) {
6210         struct dumpcontext *dctx = arg;
6211         char buf[1024+32];
6212         const dns_master_style_t *style;
6213
6214         if (result != ISC_R_SUCCESS)
6215                 goto cleanup;
6216         if (dctx->mdctx != NULL)
6217                 dns_dumpctx_detach(&dctx->mdctx);
6218         if (dctx->view == NULL) {
6219                 dctx->view = ISC_LIST_HEAD(dctx->viewlist);
6220                 if (dctx->view == NULL)
6221                         goto done;
6222                 INSIST(dctx->zone == NULL);
6223         } else
6224                 goto resume;
6225  nextview:
6226         fprintf(dctx->fp, ";\n; Start view %s\n;\n", dctx->view->view->name);
6227  resume:
6228         if (dctx->dumpcache && dns_view_iscacheshared(dctx->view->view)) {
6229                 fprintf(dctx->fp,
6230                         ";\n; Cache of view '%s' is shared as '%s'\n",
6231                         dctx->view->view->name,
6232                         dns_cache_getname(dctx->view->view->cache));
6233         } else if (dctx->zone == NULL && dctx->cache == NULL &&
6234                    dctx->dumpcache)
6235         {
6236                 style = &dns_master_style_cache;
6237                 /* start cache dump */
6238                 if (dctx->view->view->cachedb != NULL)
6239                         dns_db_attach(dctx->view->view->cachedb, &dctx->cache);
6240                 if (dctx->cache != NULL) {
6241                         fprintf(dctx->fp,
6242                                 ";\n; Cache dump of view '%s' (cache %s)\n;\n",
6243                                 dctx->view->view->name,
6244                                 dns_cache_getname(dctx->view->view->cache));
6245                         result = dns_master_dumptostreaminc(dctx->mctx,
6246                                                             dctx->cache, NULL,
6247                                                             style, dctx->fp,
6248                                                             dctx->task,
6249                                                             dumpdone, dctx,
6250                                                             &dctx->mdctx);
6251                         if (result == DNS_R_CONTINUE)
6252                                 return;
6253                         if (result == ISC_R_NOTIMPLEMENTED)
6254                                 fprintf(dctx->fp, "; %s\n",
6255                                         dns_result_totext(result));
6256                         else if (result != ISC_R_SUCCESS)
6257                                 goto cleanup;
6258                 }
6259         }
6260         if (dctx->cache != NULL) {
6261                 dns_adb_dump(dctx->view->view->adb, dctx->fp);
6262                 dns_resolver_printbadcache(dctx->view->view->resolver,
6263                                            dctx->fp);
6264                 dns_db_detach(&dctx->cache);
6265         }
6266         if (dctx->dumpzones) {
6267                 style = &dns_master_style_full;
6268  nextzone:
6269                 if (dctx->version != NULL)
6270                         dns_db_closeversion(dctx->db, &dctx->version,
6271                                             ISC_FALSE);
6272                 if (dctx->db != NULL)
6273                         dns_db_detach(&dctx->db);
6274                 if (dctx->zone == NULL)
6275                         dctx->zone = ISC_LIST_HEAD(dctx->view->zonelist);
6276                 else
6277                         dctx->zone = ISC_LIST_NEXT(dctx->zone, link);
6278                 if (dctx->zone != NULL) {
6279                         /* start zone dump */
6280                         dns_zone_name(dctx->zone->zone, buf, sizeof(buf));
6281                         fprintf(dctx->fp, ";\n; Zone dump of '%s'\n;\n", buf);
6282                         result = dns_zone_getdb(dctx->zone->zone, &dctx->db);
6283                         if (result != ISC_R_SUCCESS) {
6284                                 fprintf(dctx->fp, "; %s\n",
6285                                         dns_result_totext(result));
6286                                 goto nextzone;
6287                         }
6288                         dns_db_currentversion(dctx->db, &dctx->version);
6289                         result = dns_master_dumptostreaminc(dctx->mctx,
6290                                                             dctx->db,
6291                                                             dctx->version,
6292                                                             style, dctx->fp,
6293                                                             dctx->task,
6294                                                             dumpdone, dctx,
6295                                                             &dctx->mdctx);
6296                         if (result == DNS_R_CONTINUE)
6297                                 return;
6298                         if (result == ISC_R_NOTIMPLEMENTED) {
6299                                 fprintf(dctx->fp, "; %s\n",
6300                                         dns_result_totext(result));
6301                                 result = ISC_R_SUCCESS;
6302                                 POST(result);
6303                                 goto nextzone;
6304                         }
6305                         if (result != ISC_R_SUCCESS)
6306                                 goto cleanup;
6307                 }
6308         }
6309         if (dctx->view != NULL)
6310                 dctx->view = ISC_LIST_NEXT(dctx->view, link);
6311         if (dctx->view != NULL)
6312                 goto nextview;
6313  done:
6314         fprintf(dctx->fp, "; Dump complete\n");
6315         result = isc_stdio_flush(dctx->fp);
6316         if (result == ISC_R_SUCCESS)
6317                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6318                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6319                               "dumpdb complete");
6320  cleanup:
6321         if (result != ISC_R_SUCCESS)
6322                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6323                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6324                               "dumpdb failed: %s", dns_result_totext(result));
6325         dumpcontext_destroy(dctx);
6326 }
6327
6328 isc_result_t
6329 ns_server_dumpdb(ns_server_t *server, char *args) {
6330         struct dumpcontext *dctx = NULL;
6331         dns_view_t *view;
6332         isc_result_t result;
6333         char *ptr;
6334         const char *sep;
6335
6336         /* Skip the command name. */
6337         ptr = next_token(&args, " \t");
6338         if (ptr == NULL)
6339                 return (ISC_R_UNEXPECTEDEND);
6340
6341         dctx = isc_mem_get(server->mctx, sizeof(*dctx));
6342         if (dctx == NULL)
6343                 return (ISC_R_NOMEMORY);
6344
6345         dctx->mctx = server->mctx;
6346         dctx->dumpcache = ISC_TRUE;
6347         dctx->dumpzones = ISC_FALSE;
6348         dctx->fp = NULL;
6349         ISC_LIST_INIT(dctx->viewlist);
6350         dctx->view = NULL;
6351         dctx->zone = NULL;
6352         dctx->cache = NULL;
6353         dctx->mdctx = NULL;
6354         dctx->db = NULL;
6355         dctx->cache = NULL;
6356         dctx->task = NULL;
6357         dctx->version = NULL;
6358         isc_task_attach(server->task, &dctx->task);
6359
6360         CHECKMF(isc_stdio_open(server->dumpfile, "w", &dctx->fp),
6361                 "could not open dump file", server->dumpfile);
6362
6363         sep = (args == NULL) ? "" : ": ";
6364         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6365                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6366                       "dumpdb started%s%s", sep, (args != NULL) ? args : "");
6367
6368         ptr = next_token(&args, " \t");
6369         if (ptr != NULL && strcmp(ptr, "-all") == 0) {
6370                 dctx->dumpzones = ISC_TRUE;
6371                 dctx->dumpcache = ISC_TRUE;
6372                 ptr = next_token(&args, " \t");
6373         } else if (ptr != NULL && strcmp(ptr, "-cache") == 0) {
6374                 dctx->dumpzones = ISC_FALSE;
6375                 dctx->dumpcache = ISC_TRUE;
6376                 ptr = next_token(&args, " \t");
6377         } else if (ptr != NULL && strcmp(ptr, "-zones") == 0) {
6378                 dctx->dumpzones = ISC_TRUE;
6379                 dctx->dumpcache = ISC_FALSE;
6380                 ptr = next_token(&args, " \t");
6381         }
6382
6383  nextview:
6384         for (view = ISC_LIST_HEAD(server->viewlist);
6385              view != NULL;
6386              view = ISC_LIST_NEXT(view, link))
6387         {
6388                 if (ptr != NULL && strcmp(view->name, ptr) != 0)
6389                         continue;
6390                 CHECK(add_view_tolist(dctx, view));
6391         }
6392         if (ptr != NULL) {
6393                 ptr = next_token(&args, " \t");
6394                 if (ptr != NULL)
6395                         goto nextview;
6396         }
6397         dumpdone(dctx, ISC_R_SUCCESS);
6398         return (ISC_R_SUCCESS);
6399
6400  cleanup:
6401         if (dctx != NULL)
6402                 dumpcontext_destroy(dctx);
6403         return (result);
6404 }
6405
6406 isc_result_t
6407 ns_server_dumpsecroots(ns_server_t *server, char *args) {
6408         dns_view_t *view;
6409         dns_keytable_t *secroots = NULL;
6410         isc_result_t result;
6411         char *ptr;
6412         FILE *fp = NULL;
6413         isc_time_t now;
6414         char tbuf[64];
6415
6416         /* Skip the command name. */
6417         ptr = next_token(&args, " \t");
6418         if (ptr == NULL)
6419                 return (ISC_R_UNEXPECTEDEND);
6420         ptr = next_token(&args, " \t");
6421
6422         CHECKMF(isc_stdio_open(server->secrootsfile, "w", &fp),
6423                 "could not open secroots dump file", server->secrootsfile);
6424         TIME_NOW(&now);
6425         isc_time_formattimestamp(&now, tbuf, sizeof(tbuf));
6426         fprintf(fp, "%s\n", tbuf);
6427
6428         do {
6429                 for (view = ISC_LIST_HEAD(server->viewlist);
6430                      view != NULL;
6431                      view = ISC_LIST_NEXT(view, link))
6432                 {
6433                         if (ptr != NULL && strcmp(view->name, ptr) != 0)
6434                                 continue;
6435                         if (secroots != NULL)
6436                                 dns_keytable_detach(&secroots);
6437                         result = dns_view_getsecroots(view, &secroots);
6438                         if (result == ISC_R_NOTFOUND) {
6439                                 result = ISC_R_SUCCESS;
6440                                 continue;
6441                         }
6442                         fprintf(fp, "\n Start view %s\n\n", view->name);
6443                         result = dns_keytable_dump(secroots, fp);
6444                         if (result != ISC_R_SUCCESS)
6445                                 fprintf(fp, " dumpsecroots failed: %s\n",
6446                                         isc_result_totext(result));
6447                 }
6448                 if (ptr != NULL)
6449                         ptr = next_token(&args, " \t");
6450         } while (ptr != NULL);
6451
6452  cleanup:
6453         if (secroots != NULL)
6454                 dns_keytable_detach(&secroots);
6455         if (fp != NULL)
6456                 (void)isc_stdio_close(fp);
6457         if (result == ISC_R_SUCCESS)
6458                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6459                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6460                               "dumpsecroots complete");
6461         else
6462                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6463                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6464                               "dumpsecroots failed: %s",
6465                               dns_result_totext(result));
6466         return (result);
6467 }
6468
6469 isc_result_t
6470 ns_server_dumprecursing(ns_server_t *server) {
6471         FILE *fp = NULL;
6472         isc_result_t result;
6473
6474         CHECKMF(isc_stdio_open(server->recfile, "w", &fp),
6475                 "could not open dump file", server->recfile);
6476         fprintf(fp,";\n; Recursing Queries\n;\n");
6477         ns_interfacemgr_dumprecursing(fp, server->interfacemgr);
6478         fprintf(fp, "; Dump complete\n");
6479
6480  cleanup:
6481         if (fp != NULL)
6482                 result = isc_stdio_close(fp);
6483         if (result == ISC_R_SUCCESS)
6484                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6485                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6486                               "dumprecursing complete");
6487         else
6488                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6489                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6490                               "dumprecursing failed: %s",
6491                               dns_result_totext(result));
6492         return (result);
6493 }
6494
6495 isc_result_t
6496 ns_server_setdebuglevel(ns_server_t *server, char *args) {
6497         char *ptr;
6498         char *levelstr;
6499         char *endp;
6500         long newlevel;
6501
6502         UNUSED(server);
6503
6504         /* Skip the command name. */
6505         ptr = next_token(&args, " \t");
6506         if (ptr == NULL)
6507                 return (ISC_R_UNEXPECTEDEND);
6508
6509         /* Look for the new level name. */
6510         levelstr = next_token(&args, " \t");
6511         if (levelstr == NULL) {
6512                 if (ns_g_debuglevel < 99)
6513                         ns_g_debuglevel++;
6514         } else {
6515                 newlevel = strtol(levelstr, &endp, 10);
6516                 if (*endp != '\0' || newlevel < 0 || newlevel > 99)
6517                         return (ISC_R_RANGE);
6518                 ns_g_debuglevel = (unsigned int)newlevel;
6519         }
6520         isc_log_setdebuglevel(ns_g_lctx, ns_g_debuglevel);
6521         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6522                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6523                       "debug level is now %d", ns_g_debuglevel);
6524         return (ISC_R_SUCCESS);
6525 }
6526
6527 isc_result_t
6528 ns_server_validation(ns_server_t *server, char *args) {
6529         char *ptr, *viewname;
6530         dns_view_t *view;
6531         isc_boolean_t changed = ISC_FALSE;
6532         isc_result_t result;
6533         isc_boolean_t enable;
6534
6535         /* Skip the command name. */
6536         ptr = next_token(&args, " \t");
6537         if (ptr == NULL)
6538                 return (ISC_R_UNEXPECTEDEND);
6539
6540         /* Find out what we are to do. */
6541         ptr = next_token(&args, " \t");
6542         if (ptr == NULL)
6543                 return (ISC_R_UNEXPECTEDEND);
6544
6545         if (!strcasecmp(ptr, "on") || !strcasecmp(ptr, "yes") ||
6546             !strcasecmp(ptr, "enable") || !strcasecmp(ptr, "true"))
6547                 enable = ISC_TRUE;
6548         else if (!strcasecmp(ptr, "off") || !strcasecmp(ptr, "no") ||
6549                  !strcasecmp(ptr, "disable") || !strcasecmp(ptr, "false"))
6550                 enable = ISC_FALSE;
6551         else
6552                 return (DNS_R_SYNTAX);
6553
6554         /* Look for the view name. */
6555         viewname = next_token(&args, " \t");
6556
6557         result = isc_task_beginexclusive(server->task);
6558         RUNTIME_CHECK(result == ISC_R_SUCCESS);
6559         for (view = ISC_LIST_HEAD(server->viewlist);
6560              view != NULL;
6561              view = ISC_LIST_NEXT(view, link))
6562         {
6563                 if (viewname != NULL && strcasecmp(viewname, view->name) != 0)
6564                         continue;
6565                 result = dns_view_flushcache(view);
6566                 if (result != ISC_R_SUCCESS)
6567                         goto out;
6568                 view->enablevalidation = enable;
6569                 changed = ISC_TRUE;
6570         }
6571         if (changed)
6572                 result = ISC_R_SUCCESS;
6573         else
6574                 result = ISC_R_FAILURE;
6575  out:
6576         isc_task_endexclusive(server->task);
6577         return (result);
6578 }
6579
6580 isc_result_t
6581 ns_server_flushcache(ns_server_t *server, char *args) {
6582         char *ptr, *viewname;
6583         dns_view_t *view;
6584         isc_boolean_t flushed;
6585         isc_boolean_t found;
6586         isc_result_t result;
6587         ns_cache_t *nsc;
6588
6589         /* Skip the command name. */
6590         ptr = next_token(&args, " \t");
6591         if (ptr == NULL)
6592                 return (ISC_R_UNEXPECTEDEND);
6593
6594         /* Look for the view name. */
6595         viewname = next_token(&args, " \t");
6596
6597         result = isc_task_beginexclusive(server->task);
6598         RUNTIME_CHECK(result == ISC_R_SUCCESS);
6599         flushed = ISC_TRUE;
6600         found = ISC_FALSE;
6601
6602         /*
6603          * Flushing a cache is tricky when caches are shared by multiple views.
6604          * We first identify which caches should be flushed in the local cache
6605          * list, flush these caches, and then update other views that refer to
6606          * the flushed cache DB.
6607          */
6608         if (viewname != NULL) {
6609                 /*
6610                  * Mark caches that need to be flushed.  This is an O(#view^2)
6611                  * operation in the very worst case, but should be normally
6612                  * much more lightweight because only a few (most typically just
6613                  * one) views will match.
6614                  */
6615                 for (view = ISC_LIST_HEAD(server->viewlist);
6616                      view != NULL;
6617                      view = ISC_LIST_NEXT(view, link))
6618                 {
6619                         if (strcasecmp(viewname, view->name) != 0)
6620                                 continue;
6621                         found = ISC_TRUE;
6622                         for (nsc = ISC_LIST_HEAD(server->cachelist);
6623                              nsc != NULL;
6624                              nsc = ISC_LIST_NEXT(nsc, link)) {
6625                                 if (nsc->cache == view->cache)
6626                                         break;
6627                         }
6628                         INSIST(nsc != NULL);
6629                         nsc->needflush = ISC_TRUE;
6630                 }
6631         } else
6632                 found = ISC_TRUE;
6633
6634         /* Perform flush */
6635         for (nsc = ISC_LIST_HEAD(server->cachelist);
6636              nsc != NULL;
6637              nsc = ISC_LIST_NEXT(nsc, link)) {
6638                 if (viewname != NULL && !nsc->needflush)
6639                         continue;
6640                 nsc->needflush = ISC_TRUE;
6641                 result = dns_view_flushcache2(nsc->primaryview, ISC_FALSE);
6642                 if (result != ISC_R_SUCCESS) {
6643                         flushed = ISC_FALSE;
6644                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6645                                       NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6646                                       "flushing cache in view '%s' failed: %s",
6647                                       nsc->primaryview->name,
6648                                       isc_result_totext(result));
6649                 }
6650         }
6651
6652         /*
6653          * Fix up views that share a flushed cache: let the views update the
6654          * cache DB they're referring to.  This could also be an expensive
6655          * operation, but should typically be marginal: the inner loop is only
6656          * necessary for views that share a cache, and if there are many such
6657          * views the number of shared cache should normally be small.
6658          * A worst case is that we have n views and n/2 caches, each shared by
6659          * two views.  Then this will be a O(n^2/4) operation.
6660          */
6661         for (view = ISC_LIST_HEAD(server->viewlist);
6662              view != NULL;
6663              view = ISC_LIST_NEXT(view, link))
6664         {
6665                 if (!dns_view_iscacheshared(view))
6666                         continue;
6667                 for (nsc = ISC_LIST_HEAD(server->cachelist);
6668                      nsc != NULL;
6669                      nsc = ISC_LIST_NEXT(nsc, link)) {
6670                         if (!nsc->needflush || nsc->cache != view->cache)
6671                                 continue;
6672                         result = dns_view_flushcache2(view, ISC_TRUE);
6673                         if (result != ISC_R_SUCCESS) {
6674                                 flushed = ISC_FALSE;
6675                                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6676                                               NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6677                                               "fixing cache in view '%s' "
6678                                               "failed: %s", view->name,
6679                                               isc_result_totext(result));
6680                         }
6681                 }
6682         }
6683
6684         /* Cleanup the cache list. */
6685         for (nsc = ISC_LIST_HEAD(server->cachelist);
6686              nsc != NULL;
6687              nsc = ISC_LIST_NEXT(nsc, link)) {
6688                 nsc->needflush = ISC_FALSE;
6689         }
6690
6691         if (flushed && found) {
6692                 if (viewname != NULL)
6693                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6694                                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6695                                       "flushing cache in view '%s' succeeded",
6696                                       viewname);
6697                 else
6698                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6699                                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6700                                       "flushing caches in all views succeeded");
6701                 result = ISC_R_SUCCESS;
6702         } else {
6703                 if (!found) {
6704                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6705                                       NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6706                                       "flushing cache in view '%s' failed: "
6707                                       "view not found", viewname);
6708                         result = ISC_R_NOTFOUND;
6709                 } else
6710                         result = ISC_R_FAILURE;
6711         }
6712         isc_task_endexclusive(server->task);
6713         return (result);
6714 }
6715
6716 isc_result_t
6717 ns_server_flushname(ns_server_t *server, char *args) {
6718         char *ptr, *target, *viewname;
6719         dns_view_t *view;
6720         isc_boolean_t flushed;
6721         isc_boolean_t found;
6722         isc_result_t result;
6723         isc_buffer_t b;
6724         dns_fixedname_t fixed;
6725         dns_name_t *name;
6726
6727         /* Skip the command name. */
6728         ptr = next_token(&args, " \t");
6729         if (ptr == NULL)
6730                 return (ISC_R_UNEXPECTEDEND);
6731
6732         /* Find the domain name to flush. */
6733         target = next_token(&args, " \t");
6734         if (target == NULL)
6735                 return (ISC_R_UNEXPECTEDEND);
6736
6737         isc_buffer_init(&b, target, strlen(target));
6738         isc_buffer_add(&b, strlen(target));
6739         dns_fixedname_init(&fixed);
6740         name = dns_fixedname_name(&fixed);
6741         result = dns_name_fromtext(name, &b, dns_rootname, 0, NULL);
6742         if (result != ISC_R_SUCCESS)
6743                 return (result);
6744
6745         /* Look for the view name. */
6746         viewname = next_token(&args, " \t");
6747
6748         result = isc_task_beginexclusive(server->task);
6749         RUNTIME_CHECK(result == ISC_R_SUCCESS);
6750         flushed = ISC_TRUE;
6751         found = ISC_FALSE;
6752         for (view = ISC_LIST_HEAD(server->viewlist);
6753              view != NULL;
6754              view = ISC_LIST_NEXT(view, link))
6755         {
6756                 if (viewname != NULL && strcasecmp(viewname, view->name) != 0)
6757                         continue;
6758                 found = ISC_TRUE;
6759                 /*
6760                  * It's a little inefficient to try flushing name for all views
6761                  * if some of the views share a single cache.  But since the
6762                  * operation is lightweight we prefer simplicity here.
6763                  */
6764                 result = dns_view_flushname(view, name);
6765                 if (result != ISC_R_SUCCESS) {
6766                         flushed = ISC_FALSE;
6767                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6768                                       NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6769                                       "flushing name '%s' in cache view '%s' "
6770                                       "failed: %s", target, view->name,
6771                                       isc_result_totext(result));
6772                 }
6773         }
6774         if (flushed && found) {
6775                 if (viewname != NULL)
6776                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6777                                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6778                                       "flushing name '%s' in cache view '%s' "
6779                                       "succeeded", target, viewname);
6780                 else
6781                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6782                                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
6783                                       "flushing name '%s' in all cache views "
6784                                       "succeeded", target);
6785                 result = ISC_R_SUCCESS;
6786         } else {
6787                 if (!found)
6788                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
6789                                       NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
6790                                       "flushing name '%s' in cache view '%s' "
6791                                       "failed: view not found", target,
6792                                       viewname);
6793                 result = ISC_R_FAILURE;
6794         }
6795         isc_task_endexclusive(server->task);
6796         return (result);
6797 }
6798
6799 isc_result_t
6800 ns_server_status(ns_server_t *server, isc_buffer_t *text) {
6801         int zonecount, xferrunning, xferdeferred, soaqueries;
6802         unsigned int n;
6803         const char *ob = "", *cb = "", *alt = "";
6804
6805         if (ns_g_server->version_set) {
6806                 ob = " (";
6807                 cb = ")";
6808                 if (ns_g_server->version == NULL)
6809                         alt = "version.bind/txt/ch disabled";
6810                 else
6811                         alt = ns_g_server->version;
6812         }
6813         zonecount = dns_zonemgr_getcount(server->zonemgr, DNS_ZONESTATE_ANY);
6814         xferrunning = dns_zonemgr_getcount(server->zonemgr,
6815                                            DNS_ZONESTATE_XFERRUNNING);
6816         xferdeferred = dns_zonemgr_getcount(server->zonemgr,
6817                                             DNS_ZONESTATE_XFERDEFERRED);
6818         soaqueries = dns_zonemgr_getcount(server->zonemgr,
6819                                           DNS_ZONESTATE_SOAQUERY);
6820
6821         n = snprintf((char *)isc_buffer_used(text),
6822                      isc_buffer_availablelength(text),
6823                      "version: %s%s%s%s\n"
6824 #ifdef ISC_PLATFORM_USETHREADS
6825                      "CPUs found: %u\n"
6826                      "worker threads: %u\n"
6827 #endif
6828                      "number of zones: %u\n"
6829                      "debug level: %d\n"
6830                      "xfers running: %u\n"
6831                      "xfers deferred: %u\n"
6832                      "soa queries in progress: %u\n"
6833                      "query logging is %s\n"
6834                      "recursive clients: %d/%d/%d\n"
6835                      "tcp clients: %d/%d\n"
6836                      "server is up and running",
6837                      ns_g_version, ob, alt, cb,
6838 #ifdef ISC_PLATFORM_USETHREADS
6839                      ns_g_cpus_detected, ns_g_cpus,
6840 #endif
6841                      zonecount, ns_g_debuglevel, xferrunning, xferdeferred,
6842                      soaqueries, server->log_queries ? "ON" : "OFF",
6843                      server->recursionquota.used, server->recursionquota.soft,
6844                      server->recursionquota.max,
6845                      server->tcpquota.used, server->tcpquota.max);
6846         if (n >= isc_buffer_availablelength(text))
6847                 return (ISC_R_NOSPACE);
6848         isc_buffer_add(text, n);
6849         return (ISC_R_SUCCESS);
6850 }
6851
6852 static isc_result_t
6853 delete_keynames(dns_tsig_keyring_t *ring, char *target,
6854                 unsigned int *foundkeys)
6855 {
6856         char namestr[DNS_NAME_FORMATSIZE];
6857         isc_result_t result;
6858         dns_rbtnodechain_t chain;
6859         dns_name_t foundname;
6860         dns_fixedname_t fixedorigin;
6861         dns_name_t *origin;
6862         dns_rbtnode_t *node;
6863         dns_tsigkey_t *tkey;
6864
6865         dns_name_init(&foundname, NULL);
6866         dns_fixedname_init(&fixedorigin);
6867         origin = dns_fixedname_name(&fixedorigin);
6868
6869  again:
6870         dns_rbtnodechain_init(&chain, ring->mctx);
6871         result = dns_rbtnodechain_first(&chain, ring->keys, &foundname,
6872                                         origin);
6873         if (result == ISC_R_NOTFOUND) {
6874                 dns_rbtnodechain_invalidate(&chain);
6875                 return (ISC_R_SUCCESS);
6876         }
6877         if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
6878                 dns_rbtnodechain_invalidate(&chain);
6879                 return (result);
6880         }
6881
6882         for (;;) {
6883                 node = NULL;
6884                 dns_rbtnodechain_current(&chain, &foundname, origin, &node);
6885                 tkey = node->data;
6886
6887                 if (tkey != NULL) {
6888                         if (!tkey->generated)
6889                                 goto nextkey;
6890
6891                         dns_name_format(&tkey->name, namestr, sizeof(namestr));
6892                         if (strcmp(namestr, target) == 0) {
6893                                 (*foundkeys)++;
6894                                 dns_rbtnodechain_invalidate(&chain);
6895                                 (void)dns_rbt_deletename(ring->keys,
6896                                                          &tkey->name,
6897                                                          ISC_FALSE);
6898                                 goto again;
6899                         }
6900                 }
6901
6902         nextkey:
6903                 result = dns_rbtnodechain_next(&chain, &foundname, origin);
6904                 if (result == ISC_R_NOMORE)
6905                         break;
6906                 if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
6907                         dns_rbtnodechain_invalidate(&chain);
6908                         return (result);
6909                 }
6910         }
6911
6912         return (ISC_R_SUCCESS);
6913 }
6914
6915 isc_result_t
6916 ns_server_tsigdelete(ns_server_t *server, char *command, isc_buffer_t *text) {
6917         isc_result_t result;
6918         unsigned int n;
6919         dns_view_t *view;
6920         unsigned int foundkeys = 0;
6921         char *target;
6922         char *viewname;
6923
6924         (void)next_token(&command, " \t");  /* skip command name */
6925         target = next_token(&command, " \t");
6926         if (target == NULL)
6927                 return (ISC_R_UNEXPECTEDEND);
6928         viewname = next_token(&command, " \t");
6929
6930         result = isc_task_beginexclusive(server->task);
6931         RUNTIME_CHECK(result == ISC_R_SUCCESS);
6932         for (view = ISC_LIST_HEAD(server->viewlist);
6933              view != NULL;
6934              view = ISC_LIST_NEXT(view, link)) {
6935                 if (viewname == NULL || strcmp(view->name, viewname) == 0) {
6936                         RWLOCK(&view->dynamickeys->lock, isc_rwlocktype_write);
6937                         result = delete_keynames(view->dynamickeys, target,
6938                                                  &foundkeys);
6939                         RWUNLOCK(&view->dynamickeys->lock,
6940                                  isc_rwlocktype_write);
6941                         if (result != ISC_R_SUCCESS) {
6942                                 isc_task_endexclusive(server->task);
6943                                 return (result);
6944                         }
6945                 }
6946         }
6947         isc_task_endexclusive(server->task);
6948
6949         n = snprintf((char *)isc_buffer_used(text),
6950                      isc_buffer_availablelength(text),
6951                      "%d tsig keys deleted.\n", foundkeys);
6952         if (n >= isc_buffer_availablelength(text))
6953                 return (ISC_R_NOSPACE);
6954         isc_buffer_add(text, n);
6955
6956         return (ISC_R_SUCCESS);
6957 }
6958
6959 static isc_result_t
6960 list_keynames(dns_view_t *view, dns_tsig_keyring_t *ring, isc_buffer_t *text,
6961              unsigned int *foundkeys)
6962 {
6963         char namestr[DNS_NAME_FORMATSIZE];
6964         char creatorstr[DNS_NAME_FORMATSIZE];
6965         isc_result_t result;
6966         dns_rbtnodechain_t chain;
6967         dns_name_t foundname;
6968         dns_fixedname_t fixedorigin;
6969         dns_name_t *origin;
6970         dns_rbtnode_t *node;
6971         dns_tsigkey_t *tkey;
6972         unsigned int n;
6973         const char *viewname;
6974
6975         if (view != NULL)
6976                 viewname = view->name;
6977         else
6978                 viewname = "(global)";
6979
6980         dns_name_init(&foundname, NULL);
6981         dns_fixedname_init(&fixedorigin);
6982         origin = dns_fixedname_name(&fixedorigin);
6983         dns_rbtnodechain_init(&chain, ring->mctx);
6984         result = dns_rbtnodechain_first(&chain, ring->keys, &foundname,
6985                                         origin);
6986         if (result == ISC_R_NOTFOUND) {
6987                 dns_rbtnodechain_invalidate(&chain);
6988                 return (ISC_R_SUCCESS);
6989         }
6990         if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
6991                 dns_rbtnodechain_invalidate(&chain);
6992                 return (result);
6993         }
6994
6995         for (;;) {
6996                 node = NULL;
6997                 dns_rbtnodechain_current(&chain, &foundname, origin, &node);
6998                 tkey = node->data;
6999
7000                 if (tkey != NULL) {
7001                         (*foundkeys)++;
7002                         dns_name_format(&tkey->name, namestr, sizeof(namestr));
7003                         if (tkey->generated) {
7004                                 dns_name_format(tkey->creator, creatorstr,
7005                                                 sizeof(creatorstr));
7006                                 n = snprintf((char *)isc_buffer_used(text),
7007                                              isc_buffer_availablelength(text),
7008                                              "view \"%s\"; type \"dynamic\"; key \"%s\"; creator \"%s\";\n",
7009                                              viewname, namestr, creatorstr);
7010                         } else {
7011                                 n = snprintf((char *)isc_buffer_used(text),
7012                                              isc_buffer_availablelength(text),
7013                                              "view \"%s\"; type \"static\"; key \"%s\";\n",
7014                                              viewname, namestr);
7015                         }
7016                         if (n >= isc_buffer_availablelength(text)) {
7017                                 dns_rbtnodechain_invalidate(&chain);
7018                                 return (ISC_R_NOSPACE);
7019                         }
7020                         isc_buffer_add(text, n);
7021                 }
7022                 result = dns_rbtnodechain_next(&chain, &foundname, origin);
7023                 if (result == ISC_R_NOMORE)
7024                         break;
7025                 if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
7026                         dns_rbtnodechain_invalidate(&chain);
7027                         return (result);
7028                 }
7029         }
7030
7031         return (ISC_R_SUCCESS);
7032 }
7033
7034 isc_result_t
7035 ns_server_tsiglist(ns_server_t *server, isc_buffer_t *text) {
7036         isc_result_t result;
7037         unsigned int n;
7038         dns_view_t *view;
7039         unsigned int foundkeys = 0;
7040
7041         result = isc_task_beginexclusive(server->task);
7042         RUNTIME_CHECK(result == ISC_R_SUCCESS);
7043         for (view = ISC_LIST_HEAD(server->viewlist);
7044              view != NULL;
7045              view = ISC_LIST_NEXT(view, link)) {
7046                 RWLOCK(&view->statickeys->lock, isc_rwlocktype_read);
7047                 result = list_keynames(view, view->statickeys, text,
7048                                        &foundkeys);
7049                 RWUNLOCK(&view->statickeys->lock, isc_rwlocktype_read);
7050                 if (result != ISC_R_SUCCESS) {
7051                         isc_task_endexclusive(server->task);
7052                         return (result);
7053                 }
7054                 RWLOCK(&view->dynamickeys->lock, isc_rwlocktype_read);
7055                 result = list_keynames(view, view->dynamickeys, text,
7056                                        &foundkeys);
7057                 RWUNLOCK(&view->dynamickeys->lock, isc_rwlocktype_read);
7058                 if (result != ISC_R_SUCCESS) {
7059                         isc_task_endexclusive(server->task);
7060                         return (result);
7061                 }
7062         }
7063         isc_task_endexclusive(server->task);
7064
7065         if (foundkeys == 0) {
7066                 n = snprintf((char *)isc_buffer_used(text),
7067                              isc_buffer_availablelength(text),
7068                              "no tsig keys found.\n");
7069                 if (n >= isc_buffer_availablelength(text))
7070                         return (ISC_R_NOSPACE);
7071                 isc_buffer_add(text, n);
7072         }
7073
7074         return (ISC_R_SUCCESS);
7075 }
7076
7077 /*
7078  * Act on a "sign" or "loadkeys" command from the command channel.
7079  */
7080 isc_result_t
7081 ns_server_rekey(ns_server_t *server, char *args) {
7082         isc_result_t result;
7083         dns_zone_t *zone = NULL;
7084         dns_zonetype_t type;
7085         isc_uint16_t keyopts;
7086         isc_boolean_t fullsign = ISC_FALSE;
7087
7088         if (strncasecmp(args, NS_COMMAND_SIGN, strlen(NS_COMMAND_SIGN)) == 0)
7089             fullsign = ISC_TRUE;
7090
7091         result = zone_from_args(server, args, &zone, NULL);
7092         if (result != ISC_R_SUCCESS)
7093                 return (result);
7094         if (zone == NULL)
7095                 return (ISC_R_UNEXPECTEDEND);   /* XXX: or do all zones? */
7096
7097         type = dns_zone_gettype(zone);
7098         if (type != dns_zone_master) {
7099                 dns_zone_detach(&zone);
7100                 return (DNS_R_NOTMASTER);
7101         }
7102
7103         keyopts = dns_zone_getkeyopts(zone);
7104
7105         /* "rndc loadkeys" requires "auto-dnssec maintain". */
7106         if ((keyopts & DNS_ZONEKEY_ALLOW) == 0)
7107                 result = ISC_R_NOPERM;
7108         else if ((keyopts & DNS_ZONEKEY_MAINTAIN) == 0 && !fullsign)
7109                 result = ISC_R_NOPERM;
7110         else
7111                 dns_zone_rekey(zone, fullsign);
7112
7113         dns_zone_detach(&zone);
7114         return (result);
7115 }
7116
7117 /*
7118  * Act on a "freeze" or "thaw" command from the command channel.
7119  */
7120 isc_result_t
7121 ns_server_freeze(ns_server_t *server, isc_boolean_t freeze, char *args,
7122                  isc_buffer_t *text)
7123 {
7124         isc_result_t result, tresult;
7125         dns_zone_t *zone = NULL;
7126         dns_zonetype_t type;
7127         char classstr[DNS_RDATACLASS_FORMATSIZE];
7128         char zonename[DNS_NAME_FORMATSIZE];
7129         dns_view_t *view;
7130         char *journal;
7131         const char *vname, *sep;
7132         isc_boolean_t frozen;
7133         const char *msg = NULL;
7134
7135         result = zone_from_args(server, args, &zone, NULL);
7136         if (result != ISC_R_SUCCESS)
7137                 return (result);
7138         if (zone == NULL) {
7139                 result = isc_task_beginexclusive(server->task);
7140                 RUNTIME_CHECK(result == ISC_R_SUCCESS);
7141                 tresult = ISC_R_SUCCESS;
7142                 for (view = ISC_LIST_HEAD(server->viewlist);
7143                      view != NULL;
7144                      view = ISC_LIST_NEXT(view, link)) {
7145                         result = dns_view_freezezones(view, freeze);
7146                         if (result != ISC_R_SUCCESS &&
7147                             tresult == ISC_R_SUCCESS)
7148                                 tresult = result;
7149                 }
7150                 isc_task_endexclusive(server->task);
7151                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
7152                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
7153                               "%s all zones: %s",
7154                               freeze ? "freezing" : "thawing",
7155                               isc_result_totext(tresult));
7156                 return (tresult);
7157         }
7158         type = dns_zone_gettype(zone);
7159         if (type != dns_zone_master) {
7160                 dns_zone_detach(&zone);
7161                 return (DNS_R_NOTMASTER);
7162         }
7163
7164         result = isc_task_beginexclusive(server->task);
7165         RUNTIME_CHECK(result == ISC_R_SUCCESS);
7166         frozen = dns_zone_getupdatedisabled(zone);
7167         if (freeze) {
7168                 if (frozen) {
7169                         msg = "WARNING: The zone was already frozen.\n"
7170                               "Someone else may be editing it or "
7171                               "it may still be re-loading.";
7172                         result = DNS_R_FROZEN;
7173                 }
7174                 if (result == ISC_R_SUCCESS) {
7175                         result = dns_zone_flush(zone);
7176                         if (result != ISC_R_SUCCESS)
7177                                 msg = "Flushing the zone updates to "
7178                                       "disk failed.";
7179                 }
7180                 if (result == ISC_R_SUCCESS) {
7181                         journal = dns_zone_getjournal(zone);
7182                         if (journal != NULL)
7183                                 (void)isc_file_remove(journal);
7184                 }
7185                 if (result == ISC_R_SUCCESS)
7186                         dns_zone_setupdatedisabled(zone, freeze);
7187         } else {
7188                 if (frozen) {
7189                         result = dns_zone_loadandthaw(zone);
7190                         switch (result) {
7191                         case ISC_R_SUCCESS:
7192                         case DNS_R_UPTODATE:
7193                                 msg = "The zone reload and thaw was "
7194                                       "successful.";
7195                                 result = ISC_R_SUCCESS;
7196                                 break;
7197                         case DNS_R_CONTINUE:
7198                                 msg = "A zone reload and thaw was started.\n"
7199                                       "Check the logs to see the result.";
7200                                 result = ISC_R_SUCCESS;
7201                                 break;
7202                         }
7203                 }
7204         }
7205         isc_task_endexclusive(server->task);
7206
7207         if (msg != NULL && strlen(msg) < isc_buffer_availablelength(text))
7208                 isc_buffer_putmem(text, (const unsigned char *)msg,
7209                                   strlen(msg) + 1);
7210
7211         view = dns_zone_getview(zone);
7212         if (strcmp(view->name, "_default") == 0 ||
7213             strcmp(view->name, "_bind") == 0)
7214         {
7215                 vname = "";
7216                 sep = "";
7217         } else {
7218                 vname = view->name;
7219                 sep = " ";
7220         }
7221         dns_rdataclass_format(dns_zone_getclass(zone), classstr,
7222                               sizeof(classstr));
7223         dns_name_format(dns_zone_getorigin(zone),
7224                         zonename, sizeof(zonename));
7225         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
7226                       NS_LOGMODULE_SERVER, ISC_LOG_INFO,
7227                       "%s zone '%s/%s'%s%s: %s",
7228                       freeze ? "freezing" : "thawing",
7229                       zonename, classstr, sep, vname,
7230                       isc_result_totext(result));
7231         dns_zone_detach(&zone);
7232         return (result);
7233 }
7234
7235 #ifdef HAVE_LIBSCF
7236 /*
7237  * This function adds a message for rndc to echo if named
7238  * is managed by smf and is also running chroot.
7239  */
7240 isc_result_t
7241 ns_smf_add_message(isc_buffer_t *text) {
7242         unsigned int n;
7243
7244         n = snprintf((char *)isc_buffer_used(text),
7245                 isc_buffer_availablelength(text),
7246                 "use svcadm(1M) to manage named");
7247         if (n >= isc_buffer_availablelength(text))
7248                 return (ISC_R_NOSPACE);
7249         isc_buffer_add(text, n);
7250         return (ISC_R_SUCCESS);
7251 }
7252 #endif /* HAVE_LIBSCF */
7253
7254 /*
7255  * Act on an "addzone" command from the command channel.
7256  */
7257 isc_result_t
7258 ns_server_add_zone(ns_server_t *server, char *args) {
7259         isc_result_t         result;
7260         isc_buffer_t         argbuf;
7261         size_t               arglen;
7262         cfg_parser_t        *parser = NULL;
7263         cfg_obj_t           *config = NULL;
7264         const cfg_obj_t     *vconfig = NULL;
7265         const cfg_obj_t     *views = NULL;
7266         const cfg_obj_t     *parms = NULL;
7267         const cfg_obj_t     *obj = NULL;
7268         const cfg_listelt_t *element;
7269         const char          *zonename;
7270         const char          *classname = NULL;
7271         const char          *argp;
7272         const char          *viewname = NULL;
7273         dns_rdataclass_t     rdclass;
7274         dns_view_t          *view = 0;
7275         isc_buffer_t         buf, *nbuf = NULL;
7276         dns_name_t           dnsname;
7277         dns_zone_t          *zone = NULL;
7278         FILE                *fp = NULL;
7279         struct cfg_context  *cfg = NULL;
7280
7281         /* Try to parse the argument string */
7282         arglen = strlen(args);
7283         isc_buffer_init(&argbuf, args, arglen);
7284         isc_buffer_add(&argbuf, strlen(args));
7285         CHECK(cfg_parser_create(server->mctx, ns_g_lctx, &parser));
7286         CHECK(cfg_parse_buffer(parser, &argbuf, &cfg_type_addzoneconf,
7287                                &config));
7288         CHECK(cfg_map_get(config, "addzone", &parms));
7289
7290         zonename = cfg_obj_asstring(cfg_tuple_get(parms, "name"));
7291         isc_buffer_init(&buf, zonename, strlen(zonename));
7292         isc_buffer_add(&buf, strlen(zonename));
7293         dns_name_init(&dnsname, NULL);
7294         isc_buffer_allocate(server->mctx, &nbuf, 256);
7295         dns_name_setbuffer(&dnsname, nbuf);
7296         CHECK(dns_name_fromtext(&dnsname, &buf, dns_rootname, ISC_FALSE, NULL));
7297
7298         /* Make sense of optional class argument */
7299         obj = cfg_tuple_get(parms, "class");
7300         CHECK(ns_config_getclass(obj, dns_rdataclass_in, &rdclass));
7301         if (rdclass != dns_rdataclass_in && obj)
7302                 classname = cfg_obj_asstring(obj);
7303
7304         /* Make sense of optional view argument */
7305         obj = cfg_tuple_get(parms, "view");
7306         if (obj && cfg_obj_isstring(obj))
7307                 viewname = cfg_obj_asstring(obj);
7308         if (viewname == NULL || *viewname == '\0')
7309                 viewname = "_default";
7310         CHECK(dns_viewlist_find(&server->viewlist, viewname, rdclass, &view));
7311
7312         /* Are we accepting new zones? */
7313         if (view->new_zone_file == NULL) {
7314                 result = ISC_R_NOPERM;
7315                 goto cleanup;
7316         }
7317
7318         cfg = (struct cfg_context *) view->new_zone_config;
7319         if (cfg == NULL) {
7320                 result = ISC_R_FAILURE;
7321                 goto cleanup;
7322         }
7323
7324         /* Zone shouldn't already exist */
7325         result = dns_zt_find(view->zonetable, &dnsname, 0, NULL, &zone);
7326         if (result == ISC_R_SUCCESS) {
7327                 result = ISC_R_EXISTS;
7328                 goto cleanup;
7329         } else if (result == DNS_R_PARTIALMATCH) {
7330                 /* Create our sub-zone anyway */
7331                 dns_zone_detach(&zone);
7332                 zone = NULL;
7333         }
7334         else if (result != ISC_R_NOTFOUND)
7335                 goto cleanup;
7336
7337         /* Find the view statement */
7338         cfg_map_get(cfg->config, "view", &views);
7339         for (element = cfg_list_first(views);
7340              element != NULL;
7341              element = cfg_list_next(element))
7342         {
7343                 const char *vname;
7344                 vconfig = cfg_listelt_value(element);
7345                 vname = cfg_obj_asstring(cfg_tuple_get(vconfig, "name"));
7346                 if (vname && !strcasecmp(vname, viewname))
7347                         break;
7348                 vconfig = NULL;
7349         }
7350
7351         /* Open save file for write configuration */
7352         CHECK(isc_stdio_open(view->new_zone_file, "a", &fp));
7353
7354         /* Mark view unfrozen so that zone can be added */
7355         dns_view_thaw(view);
7356         result = configure_zone(cfg->config, parms, vconfig,
7357                                 server->mctx, view, cfg->actx, ISC_FALSE);
7358         dns_view_freeze(view);
7359         if (result != ISC_R_SUCCESS) {
7360                 goto cleanup;
7361         }
7362
7363         /* Is it there yet? */
7364         CHECK(dns_zt_find(view->zonetable, &dnsname, 0, NULL, &zone));
7365
7366         /*
7367          * Load the zone from the master file.  If this fails, we'll
7368          * need to undo the configuration we've done already.
7369          */
7370         result = dns_zone_loadnew(zone);
7371         if (result != ISC_R_SUCCESS) {
7372                 dns_db_t *dbp = NULL;
7373
7374                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
7375                               NS_LOGMODULE_SERVER, ISC_LOG_INFO,
7376                               "addzone failed; reverting.");
7377
7378                 /* If the zone loaded partially, unload it */
7379                 if (dns_zone_getdb(zone, &dbp) == ISC_R_SUCCESS) {
7380                         dns_db_detach(&dbp);
7381                         dns_zone_unload(zone);
7382                 }
7383
7384                 /* Remove the zone from the zone table */
7385                 dns_zt_unmount(view->zonetable, zone);
7386                 goto cleanup;
7387         }
7388
7389         /* Flag the zone as having been added at runtime */
7390         dns_zone_setadded(zone, ISC_TRUE);
7391
7392         /* Emit just the zone name from args */
7393         CHECK(isc_stdio_write("zone ", 5, 1, fp, NULL));
7394         CHECK(isc_stdio_write(zonename, strlen(zonename), 1, fp, NULL));
7395         CHECK(isc_stdio_write(" ", 1, 1, fp, NULL));
7396
7397         /* Classname, if not default */
7398         if (classname != NULL && *classname != '\0') {
7399                 CHECK(isc_stdio_write(classname, strlen(classname), 1, fp,
7400                                       NULL));
7401                 CHECK(isc_stdio_write(" ", 1, 1, fp, NULL));
7402         }
7403
7404         /* Find beginning of option block from args */
7405         for (argp = args; *argp; argp++, arglen--) {
7406                 if (*argp == '{') {     /* Assume matching '}' */
7407                         /* Add that to our file */
7408                         CHECK(isc_stdio_write(argp, arglen, 1, fp, NULL));
7409
7410                         /* Make sure we end with a LF */
7411                         if (argp[arglen-1] != '\n') {
7412                                 CHECK(isc_stdio_write("\n", 1, 1, fp, NULL));
7413                         }
7414                         break;
7415                 }
7416         }
7417
7418         CHECK(isc_stdio_close(fp));
7419         fp = NULL;
7420         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
7421                                   NS_LOGMODULE_SERVER, ISC_LOG_INFO,
7422                                   "zone %s added to view %s via addzone",
7423                                   zonename, viewname);
7424
7425         result = ISC_R_SUCCESS;
7426
7427  cleanup:
7428         if (fp != NULL)
7429                 isc_stdio_close(fp);
7430         if (parser != NULL) {
7431                 if (config != NULL)
7432                         cfg_obj_destroy(parser, &config);
7433                 cfg_parser_destroy(&parser);
7434         }
7435         if (zone != NULL)
7436                 dns_zone_detach(&zone);
7437         if (view != NULL)
7438                 dns_view_detach(&view);
7439         if (nbuf != NULL)
7440                 isc_buffer_free(&nbuf);
7441
7442         return (result);
7443 }
7444
7445 /*
7446  * Act on a "delzone" command from the command channel.
7447  */
7448 isc_result_t
7449 ns_server_del_zone(ns_server_t *server, char *args) {
7450         isc_result_t           result;
7451         dns_zone_t            *zone = NULL;
7452         dns_view_t            *view = NULL;
7453         dns_db_t              *dbp = NULL;
7454         const char            *filename = NULL;
7455         char                  *tmpname = NULL;
7456         char                   buf[1024];
7457         const char            *zonename = NULL;
7458         size_t                 znamelen = 0;
7459         FILE                  *ifp = NULL, *ofp = NULL;
7460
7461         /* Parse parameters */
7462         CHECK(zone_from_args(server, args, &zone, &zonename));
7463         if (result != ISC_R_SUCCESS)
7464                 return (result);
7465         if (zone == NULL) {
7466                 result = ISC_R_UNEXPECTEDEND;
7467                 goto cleanup;
7468         }
7469
7470         /*
7471          * Was this zone originally added at runtime?
7472          * If not, we can't delete it now.
7473          */
7474         if (!dns_zone_getadded(zone)) {
7475                 result = ISC_R_NOPERM;
7476                 goto cleanup;
7477         }
7478
7479         if (zonename != NULL)
7480                 znamelen = strlen(zonename);
7481
7482         /* Dig out configuration for this zone */
7483         view = dns_zone_getview(zone);
7484         filename = view->new_zone_file;
7485         if (filename == NULL) {
7486                 /* No adding zones in this view */
7487                 result = ISC_R_FAILURE;
7488                 goto cleanup;
7489         }
7490
7491         /* Rewrite zone list */
7492         result = isc_stdio_open(filename, "r", &ifp);
7493         if (ifp != NULL && result == ISC_R_SUCCESS) {
7494                 char *found = NULL, *p = NULL;
7495                 size_t n;
7496
7497                 /* Create a temporary file */
7498                 CHECK(isc_string_printf(buf, 1023, "%s.%ld", filename,
7499                                         (long)getpid()));
7500                 if (!(tmpname = isc_mem_strdup(server->mctx, buf))) {
7501                         result = ISC_R_NOMEMORY;
7502                         goto cleanup;
7503                 }
7504                 CHECK(isc_stdio_open(tmpname, "w", &ofp));
7505
7506                 /* Look for the entry for that zone */
7507                 while (fgets(buf, 1024, ifp)) {
7508                         /* A 'zone' line */
7509                         if (strncasecmp(buf, "zone", 4)) {
7510                                 fputs(buf, ofp);
7511                                 continue;
7512                         }
7513                         p = buf+4;
7514
7515                         /* Locate a name */
7516                         while (*p &&
7517                                ((*p == '"') || isspace((unsigned char)*p)))
7518                                 p++;
7519
7520                         /* Is that the zone we're looking for */
7521                         if (strncasecmp(p, zonename, znamelen)) {
7522                                 fputs(buf, ofp);
7523                                 continue;
7524                         }
7525
7526                         /* And nothing else? */
7527                         p += znamelen;
7528                         if (isspace((unsigned char)*p) ||
7529                             *p == '"' || *p == '{') {
7530                                 /* This must be the entry */
7531                                 found = p;
7532                                 break;
7533                         }
7534
7535                         /* Spit it out, keep looking */
7536                         fputs(buf, ofp);
7537                 }
7538
7539                 /* Skip over an option block (matching # of braces) */
7540                 if (found) {
7541                         int obrace = 0, cbrace = 0;
7542                         for (;;) {
7543                                 while (*p) {
7544                                         if (*p == '{') obrace++;
7545                                         if (*p == '}') cbrace++;
7546                                         p++;
7547                                 }
7548                                 if (obrace && (obrace == cbrace))
7549                                         break;
7550                                 if (!fgets(buf, 1024, ifp))
7551                                         break;
7552                                 p = buf;
7553                         }
7554
7555                         /* Just spool the remainder of the file out */
7556                         result = isc_stdio_read(buf, 1, 1024, ifp, &n);
7557                         while (n > 0U) {
7558                                 if (result == ISC_R_EOF)
7559                                         result = ISC_R_SUCCESS;
7560                                 CHECK(result);
7561                                 isc_stdio_write(buf, 1, n, ofp, NULL);
7562                                 result = isc_stdio_read(buf, 1, 1024, ifp, &n);
7563                         }
7564
7565                         /* Move temporary into place */
7566                         CHECK(isc_file_rename(tmpname, view->new_zone_file));
7567                 } else {
7568                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
7569                                       NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
7570                                       "deleted zone %s was missing from "
7571                                       "new zone file", zonename);
7572                         goto cleanup;
7573                 }
7574         }
7575
7576         /* Stop answering for this zone */
7577         if (dns_zone_getdb(zone, &dbp) == ISC_R_SUCCESS) {
7578                 dns_db_detach(&dbp);
7579                 dns_zone_unload(zone);
7580         }
7581
7582         CHECK(dns_zt_unmount(view->zonetable, zone));
7583
7584         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
7585                                   NS_LOGMODULE_SERVER, ISC_LOG_INFO,
7586                                   "zone %s removed via delzone", zonename);
7587
7588         result = ISC_R_SUCCESS;
7589
7590  cleanup:
7591         if (ifp != NULL)
7592                 isc_stdio_close(ifp);
7593         if (ofp != NULL) {
7594                 isc_stdio_close(ofp);
7595                 isc_file_remove(tmpname);
7596         }
7597         if (tmpname != NULL)
7598                 isc_mem_free(server->mctx, tmpname);
7599         if (zone != NULL)
7600                 dns_zone_detach(&zone);
7601
7602         return (result);
7603 }
7604
7605 static void
7606 newzone_cfgctx_destroy(void **cfgp) {
7607         struct cfg_context *cfg;
7608
7609         REQUIRE(cfgp != NULL && *cfgp != NULL);
7610
7611         cfg = *cfgp;
7612
7613         if (cfg->actx != NULL)
7614                 cfg_aclconfctx_detach(&cfg->actx);
7615
7616         if (cfg->parser != NULL) {
7617                 if (cfg->config != NULL)
7618                         cfg_obj_destroy(cfg->parser, &cfg->config);
7619                 cfg_parser_destroy(&cfg->parser);
7620         }
7621         if (cfg->nzparser != NULL) {
7622                 if (cfg->nzconfig != NULL)
7623                         cfg_obj_destroy(cfg->nzparser, &cfg->nzconfig);
7624                 cfg_parser_destroy(&cfg->nzparser);
7625         }
7626
7627         isc_mem_putanddetach(&cfg->mctx, cfg, sizeof(*cfg));
7628         *cfgp = NULL;
7629 }