contrib/unbound/smallapp/unbound-checkconf.c

   1 /*
   2  * checkconf/unbound-checkconf.c - config file checker for unbound.conf file.
   3  *
   4  * Copyright (c) 2007, NLnet Labs. All rights reserved.
   5  *
   6  * This software is open source.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * Redistributions in binary form must reproduce the above copyright notice,
  16  * this list of conditions and the following disclaimer in the documentation
  17  * and/or other materials provided with the distribution.
  18  *
  19  * Neither the name of the NLNET LABS nor the names of its contributors may
  20  * be used to endorse or promote products derived from this software without
  21  * specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  30  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /**
  37  * \file
  38  *
  39  * The config checker checks for syntax and other errors in the unbound.conf
  40  * file, and can be used to check for errors before the server is started
  41  * or sigHUPped.
  42  * Exit status 1 means an error.
  43  */
  44
  45 #include "config.h"
  46 #include <ctype.h>
  47 #include "util/log.h"
  48 #include "util/config_file.h"
  49 #include "util/module.h"
  50 #include "util/net_help.h"
  51 #include "util/regional.h"
  52 #include "iterator/iterator.h"
  53 #include "iterator/iter_fwd.h"
  54 #include "iterator/iter_hints.h"
  55 #include "validator/validator.h"
  56 #include "services/localzone.h"
  57 #include "services/view.h"
  58 #include "services/authzone.h"
  59 #include "respip/respip.h"
  60 #include "sldns/sbuffer.h"
  61 #include "sldns/str2wire.h"
  62 #ifdef HAVE_GETOPT_H
  63 #include <getopt.h>
  64 #endif
  65 #ifdef HAVE_PWD_H
  66 #include <pwd.h>
  67 #endif
  68 #ifdef HAVE_SYS_STAT_H
  69 #include <sys/stat.h>
  70 #endif
  71 #ifdef HAVE_GLOB_H
  72 #include <glob.h>
  73 #endif
  74 #ifdef WITH_PYTHONMODULE
  75 #include "pythonmod/pythonmod.h"
  76 #endif
  77 #ifdef CLIENT_SUBNET
  78 #include "edns-subnet/subnet-whitelist.h"
  79 #endif
  80
  81 /** Give checkconf usage, and exit (1). */
  82 static void
  83 usage(void)
  84 {
  85         printf("Usage:  local-unbound-checkconf [file]\n");
  86         printf("        Checks unbound configuration file for errors.\n");
  87         printf("file    if omitted %s is used.\n", CONFIGFILE);
  88         printf("-o option       print value of option to stdout.\n");
  89         printf("-f              output full pathname with chroot applied, eg. with -o pidfile.\n");
  90         printf("-h              show this usage help.\n");
  91         printf("Version %s\n", PACKAGE_VERSION);
  92         printf("BSD licensed, see LICENSE in source package for details.\n");
  93         printf("Report bugs to %s\n", PACKAGE_BUGREPORT);
  94         exit(1);
  95 }
  96
  97 /**
  98  * Print given option to stdout
  99  * @param cfg: config
 100  * @param opt: option name without trailing :.
 101  *      This is different from config_set_option.
 102  * @param final: if final pathname with chroot applied has to be printed.
 103  */
 104 static void
 105 print_option(struct config_file* cfg, const char* opt, int final)
 106 {
 107         if(strcmp(opt, "pidfile") == 0 && final) {
 108                 char *p = fname_after_chroot(cfg->pidfile, cfg, 1);
 109                 if(!p) fatal_exit("out of memory");
 110                 printf("%s\n", p);
 111                 free(p);
 112                 return;
 113         }
 114         if(strcmp(opt, "auto-trust-anchor-file") == 0 && final) {
 115                 struct config_strlist* s = cfg->auto_trust_anchor_file_list;
 116                 for(; s; s=s->next) {
 117                         char *p = fname_after_chroot(s->str, cfg, 1);
 118                         if(!p) fatal_exit("out of memory");
 119                         printf("%s\n", p);
 120                         free(p);
 121                 }
 122                 return;
 123         }
 124         if(!config_get_option(cfg, opt, config_print_func, stdout))
 125                 fatal_exit("cannot print option '%s'", opt);
 126 }
 127
 128 /** check if module works with config */
 129 static void
 130 check_mod(struct config_file* cfg, struct module_func_block* fb)
 131 {
 132         struct module_env env;
 133         memset(&env, 0, sizeof(env));
 134         env.cfg = cfg;
 135         env.scratch = regional_create();
 136         env.scratch_buffer = sldns_buffer_new(BUFSIZ);
 137         if(!env.scratch || !env.scratch_buffer)
 138                 fatal_exit("out of memory");
 139         if(!edns_known_options_init(&env))
 140                 fatal_exit("out of memory");
 141         if(!(*fb->init)(&env, 0)) {
 142                 fatal_exit("bad config for %s module", fb->name);
 143         }
 144         (*fb->deinit)(&env, 0);
 145         sldns_buffer_free(env.scratch_buffer);
 146         regional_destroy(env.scratch);
 147         edns_known_options_delete(&env);
 148 }
 149
 150 /** true if addr is a localhost address, 127.0.0.1 or ::1 (with maybe "@port"
 151  * after it) */
 152 static int
 153 str_addr_is_localhost(const char* a)
 154 {
 155         if(strncmp(a, "127.", 4) == 0) return 1;
 156         if(strncmp(a, "::1", 3) == 0) return 1;
 157         return 0;
 158 }
 159
 160 /** check do-not-query-localhost */
 161 static void
 162 donotquerylocalhostcheck(struct config_file* cfg)
 163 {
 164         if(cfg->donotquery_localhost) {
 165                 struct config_stub* p;
 166                 struct config_strlist* s;
 167                 for(p=cfg->forwards; p; p=p->next) {
 168                         for(s=p->addrs; s; s=s->next) {
 169                                 if(str_addr_is_localhost(s->str)) {
 170                                         fprintf(stderr, "unbound-checkconf: warning: forward-addr: '%s' is specified for forward-zone: '%s', but do-not-query-localhost: yes means that the address will not be used for lookups.\n",
 171                                                 s->str, p->name);
 172                                 }
 173                         }
 174                 }
 175                 for(p=cfg->stubs; p; p=p->next) {
 176                         for(s=p->addrs; s; s=s->next) {
 177                                 if(str_addr_is_localhost(s->str)) {
 178                                         fprintf(stderr, "unbound-checkconf: warning: stub-addr: '%s' is specified for stub-zone: '%s', but do-not-query-localhost: yes means that the address will not be used for lookups.\n",
 179                                                 s->str, p->name);
 180                                 }
 181                         }
 182                 }
 183         }
 184 }
 185
 186 /** check localzones */
 187 static void
 188 localzonechecks(struct config_file* cfg)
 189 {
 190         struct local_zones* zs;
 191         if(!(zs = local_zones_create()))
 192                 fatal_exit("out of memory");
 193         if(!local_zones_apply_cfg(zs, cfg))
 194                 fatal_exit("failed local-zone, local-data configuration");
 195         local_zones_delete(zs);
 196 }
 197
 198 /** checks for acl and views */
 199 static void
 200 acl_view_tag_checks(struct config_file* cfg, struct views* views)
 201 {
 202         int d;
 203         struct sockaddr_storage a;
 204         socklen_t alen;
 205         struct config_str2list* acl;
 206         struct config_str3list* s3;
 207         struct config_strbytelist* sb;
 208
 209         /* acl_view */
 210         for(acl=cfg->acl_view; acl; acl = acl->next) {
 211                 struct view* v;
 212                 if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen,
 213                         &d)) {
 214                         fatal_exit("cannot parse access-control-view "
 215                                 "address %s %s", acl->str, acl->str2);
 216                 }
 217                 v = views_find_view(views, acl->str2, 0);
 218                 if(!v) {
 219                         fatal_exit("cannot find view for "
 220                                 "access-control-view: %s %s",
 221                                 acl->str, acl->str2);
 222                 }
 223                 lock_rw_unlock(&v->lock);
 224         }
 225
 226         /* acl_tags */
 227         for(sb=cfg->acl_tags; sb; sb = sb->next) {
 228                 if(!netblockstrtoaddr(sb->str, UNBOUND_DNS_PORT, &a, &alen,
 229                         &d)) {
 230                         fatal_exit("cannot parse access-control-tags "
 231                                 "address %s", sb->str);
 232                 }
 233         }
 234
 235         /* acl_tag_actions */
 236         for(s3=cfg->acl_tag_actions; s3; s3 = s3->next) {
 237                 enum localzone_type t;
 238                 if(!netblockstrtoaddr(s3->str, UNBOUND_DNS_PORT, &a, &alen,
 239                         &d)) {
 240                         fatal_exit("cannot parse access-control-tag-actions "
 241                                 "address %s %s %s",
 242                                 s3->str, s3->str2, s3->str3);
 243                 }
 244                 if(find_tag_id(cfg, s3->str2) == -1) {
 245                         fatal_exit("cannot parse tag %s (define-tag it), "
 246                                 "for access-control-tag-actions: %s %s %s",
 247                                 s3->str2, s3->str, s3->str2, s3->str3);
 248                 }
 249                 if(!local_zone_str2type(s3->str3, &t)) {
 250                         fatal_exit("cannot parse access control action type %s"
 251                                 " for access-control-tag-actions: %s %s %s",
 252                                 s3->str3, s3->str, s3->str2, s3->str3);
 253                 }
 254         }
 255
 256         /* acl_tag_datas */
 257         for(s3=cfg->acl_tag_datas; s3; s3 = s3->next) {
 258                 char buf[65536];
 259                 uint8_t rr[LDNS_RR_BUF_SIZE];
 260                 size_t len = sizeof(rr);
 261                 int res;
 262                 if(!netblockstrtoaddr(s3->str, UNBOUND_DNS_PORT, &a, &alen,
 263                         &d)) {
 264                         fatal_exit("cannot parse access-control-tag-datas address %s %s '%s'",
 265                                 s3->str, s3->str2, s3->str3);
 266                 }
 267                 if(find_tag_id(cfg, s3->str2) == -1) {
 268                         fatal_exit("cannot parse tag %s (define-tag it), "
 269                                 "for access-control-tag-datas: %s %s '%s'",
 270                                 s3->str2, s3->str, s3->str2, s3->str3);
 271                 }
 272                 /* '.' is sufficient for validation, and it makes the call to
 273                  * sldns_wirerr_get_type() simpler below. */
 274                 snprintf(buf, sizeof(buf), "%s %s", ".", s3->str3);
 275                 res = sldns_str2wire_rr_buf(buf, rr, &len, NULL, 3600, NULL,
 276                         0, NULL, 0);
 277                 if(res != 0) {
 278                         fatal_exit("cannot parse rr data [char %d] parse error %s, for access-control-tag-datas: %s %s '%s'",
 279                                 (int)LDNS_WIREPARSE_OFFSET(res)-2,
 280                                 sldns_get_errorstr_parse(res),
 281                                 s3->str, s3->str2, s3->str3);
 282                 }
 283         }
 284 }
 285
 286 /** check view and response-ip configuration */
 287 static void
 288 view_and_respipchecks(struct config_file* cfg)
 289 {
 290         struct views* views = NULL;
 291         struct respip_set* respip = NULL;
 292         int ignored = 0;
 293         if(!(views = views_create()))
 294                 fatal_exit("Could not create views: out of memory");
 295         if(!(respip = respip_set_create()))
 296                 fatal_exit("Could not create respip set: out of memory");
 297         if(!views_apply_cfg(views, cfg))
 298                 fatal_exit("Could not set up views");
 299         if(!respip_global_apply_cfg(respip, cfg))
 300                 fatal_exit("Could not setup respip set");
 301         if(!respip_views_apply_cfg(views, cfg, &ignored))
 302                 fatal_exit("Could not setup per-view respip sets");
 303         acl_view_tag_checks(cfg, views);
 304         views_delete(views);
 305         respip_set_delete(respip);
 306 }
 307
 308 /** emit warnings for IP in hosts */
 309 static void
 310 warn_hosts(const char* typ, struct config_stub* list)
 311 {
 312         struct sockaddr_storage a;
 313         socklen_t alen;
 314         struct config_stub* s;
 315         struct config_strlist* h;
 316         for(s=list; s; s=s->next) {
 317                 for(h=s->hosts; h; h=h->next) {
 318                         if(extstrtoaddr(h->str, &a, &alen)) {
 319                                 fprintf(stderr, "unbound-checkconf: warning:"
 320                                   " %s %s: \"%s\" is an IP%s address, "
 321                                   "and when looked up as a host name "
 322                                   "during use may not resolve.\n",
 323                                   s->name, typ, h->str,
 324                                   addr_is_ip6(&a, alen)?"6":"4");
 325                         }
 326                 }
 327         }
 328 }
 329
 330 /** check interface strings */
 331 static void
 332 interfacechecks(struct config_file* cfg)
 333 {
 334         int d;
 335         struct sockaddr_storage a;
 336         socklen_t alen;
 337         int i, j;
 338         for(i=0; i<cfg->num_ifs; i++) {
 339                 if(!extstrtoaddr(cfg->ifs[i], &a, &alen)) {
 340                         fatal_exit("cannot parse interface specified as '%s'",
 341                                 cfg->ifs[i]);
 342                 }
 343                 for(j=0; j<cfg->num_ifs; j++) {
 344                         if(i!=j && strcmp(cfg->ifs[i], cfg->ifs[j])==0)
 345                                 fatal_exit("interface: %s present twice, "
 346                                         "cannot bind same ports twice.",
 347                                         cfg->ifs[i]);
 348                 }
 349         }
 350         for(i=0; i<cfg->num_out_ifs; i++) {
 351                 if(!ipstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen) &&
 352                    !netblockstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen, &d)) {
 353                         fatal_exit("cannot parse outgoing-interface "
 354                                 "specified as '%s'", cfg->out_ifs[i]);
 355                 }
 356                 for(j=0; j<cfg->num_out_ifs; j++) {
 357                         if(i!=j && strcmp(cfg->out_ifs[i], cfg->out_ifs[j])==0)
 358                                 fatal_exit("outgoing-interface: %s present "
 359                                         "twice, cannot bind same ports twice.",
 360                                         cfg->out_ifs[i]);
 361                 }
 362         }
 363 }
 364
 365 /** check acl ips */
 366 static void
 367 aclchecks(struct config_file* cfg)
 368 {
 369         int d;
 370         struct sockaddr_storage a;
 371         socklen_t alen;
 372         struct config_str2list* acl;
 373         for(acl=cfg->acls; acl; acl = acl->next) {
 374                 if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen,
 375                         &d)) {
 376                         fatal_exit("cannot parse access control address %s %s",
 377                                 acl->str, acl->str2);
 378                 }
 379         }
 380 }
 381
 382 /** check tcp connection limit ips */
 383 static void
 384 tcpconnlimitchecks(struct config_file* cfg)
 385 {
 386         int d;
 387         struct sockaddr_storage a;
 388         socklen_t alen;
 389         struct config_str2list* tcl;
 390         for(tcl=cfg->tcp_connection_limits; tcl; tcl = tcl->next) {
 391                 if(!netblockstrtoaddr(tcl->str, UNBOUND_DNS_PORT, &a, &alen,
 392                         &d)) {
 393                         fatal_exit("cannot parse tcp connection limit address %s %s",
 394                                 tcl->str, tcl->str2);
 395                 }
 396         }
 397 }
 398
 399 /** true if fname is a file */
 400 static int
 401 is_file(const char* fname)
 402 {
 403         struct stat buf;
 404         if(stat(fname, &buf) < 0) {
 405                 if(errno==EACCES) {
 406                         printf("warning: no search permission for one of the directories in path: %s\n", fname);
 407                         return 1;
 408                 }
 409                 perror(fname);
 410                 return 0;
 411         }
 412         if(S_ISDIR(buf.st_mode)) {
 413                 printf("%s is not a file\n", fname);
 414                 return 0;
 415         }
 416         return 1;
 417 }
 418
 419 /** true if fname is a directory */
 420 static int
 421 is_dir(const char* fname)
 422 {
 423         struct stat buf;
 424         if(stat(fname, &buf) < 0) {
 425                 if(errno==EACCES) {
 426                         printf("warning: no search permission for one of the directories in path: %s\n", fname);
 427                         return 1;
 428                 }
 429                 perror(fname);
 430                 return 0;
 431         }
 432         if(!(S_ISDIR(buf.st_mode))) {
 433                 printf("%s is not a directory\n", fname);
 434                 return 0;
 435         }
 436         return 1;
 437 }
 438
 439 /** get base dir of a fname */
 440 static char*
 441 basedir(char* fname)
 442 {
 443         char* rev;
 444         if(!fname) fatal_exit("out of memory");
 445         rev = strrchr(fname, '/');
 446         if(!rev) return NULL;
 447         if(fname == rev) return NULL;
 448         rev[0] = 0;
 449         return fname;
 450 }
 451
 452 /** check chroot for a file string */
 453 static void
 454 check_chroot_string(const char* desc, char** ss,
 455         const char* chrootdir, struct config_file* cfg)
 456 {
 457         char* str = *ss;
 458         if(str && str[0]) {
 459                 *ss = fname_after_chroot(str, cfg, 1);
 460                 if(!*ss) fatal_exit("out of memory");
 461                 if(!is_file(*ss)) {
 462                         if(chrootdir && chrootdir[0])
 463                                 fatal_exit("%s: \"%s\" does not exist in "
 464                                         "chrootdir %s", desc, str, chrootdir);
 465                         else
 466                                 fatal_exit("%s: \"%s\" does not exist",
 467                                         desc, str);
 468                 }
 469                 /* put in a new full path for continued checking */
 470                 free(str);
 471         }
 472 }
 473
 474 /** check file list, every file must be inside the chroot location */
 475 static void
 476 check_chroot_filelist(const char* desc, struct config_strlist* list,
 477         const char* chrootdir, struct config_file* cfg)
 478 {
 479         struct config_strlist* p;
 480         for(p=list; p; p=p->next) {
 481                 check_chroot_string(desc, &p->str, chrootdir, cfg);
 482         }
 483 }
 484
 485 /** check file list, with wildcard processing */
 486 static void
 487 check_chroot_filelist_wild(const char* desc, struct config_strlist* list,
 488         const char* chrootdir, struct config_file* cfg)
 489 {
 490         struct config_strlist* p;
 491         for(p=list; p; p=p->next) {
 492 #ifdef HAVE_GLOB
 493                 if(strchr(p->str, '*') || strchr(p->str, '[') ||
 494                         strchr(p->str, '?') || strchr(p->str, '{') ||
 495                         strchr(p->str, '~')) {
 496                         char* s = p->str;
 497                         /* adjust whole pattern for chroot and check later */
 498                         p->str = fname_after_chroot(p->str, cfg, 1);
 499                         free(s);
 500                 } else
 501 #endif /* HAVE_GLOB */
 502                         check_chroot_string(desc, &p->str, chrootdir, cfg);
 503         }
 504 }
 505
 506 #ifdef CLIENT_SUBNET
 507 /** check ECS configuration */
 508 static void
 509 ecs_conf_checks(struct config_file* cfg)
 510 {
 511         struct ecs_whitelist* whitelist = NULL;
 512         if(!(whitelist = ecs_whitelist_create()))
 513                 fatal_exit("Could not create ednssubnet whitelist: out of memory");
 514         if(!ecs_whitelist_apply_cfg(whitelist, cfg))
 515                 fatal_exit("Could not setup ednssubnet whitelist");
 516         ecs_whitelist_delete(whitelist);
 517 }
 518 #endif /* CLIENT_SUBNET */
 519
 520 /** check that the modules exist, are compiled in */
 521 static void
 522 check_modules_exist(const char* module_conf)
 523 {
 524         const char** names = module_list_avail();
 525         const char* s = module_conf;
 526         while(*s) {
 527                 int i = 0;
 528                 int is_ok = 0;
 529                 while(*s && isspace((unsigned char)*s))
 530                         s++;
 531                 if(!*s) break;
 532                 while(names[i]) {
 533                         if(strncmp(names[i], s, strlen(names[i])) == 0) {
 534                                 is_ok = 1;
 535                                 break;
 536                         }
 537                         i++;
 538                 }
 539                 if(is_ok == 0) {
 540                         char n[64];
 541                         size_t j;
 542                         n[0]=0;
 543                         n[sizeof(n)-1]=0;
 544                         for(j=0; j<sizeof(n)-1; j++) {
 545                                 if(!s[j] || isspace((unsigned char)s[j])) {
 546                                         n[j] = 0;
 547                                         break;
 548                                 }
 549                                 n[j] = s[j];
 550                         }
 551                         fatal_exit("module_conf lists module '%s' but that "
 552                                 "module is not available.", n);
 553                 }
 554                 s += strlen(names[i]);
 555         }
 556 }
 557
 558 /** check configuration for errors */
 559 static void
 560 morechecks(struct config_file* cfg)
 561 {
 562         warn_hosts("stub-host", cfg->stubs);
 563         warn_hosts("forward-host", cfg->forwards);
 564         interfacechecks(cfg);
 565         aclchecks(cfg);
 566         tcpconnlimitchecks(cfg);
 567
 568         if(cfg->verbosity < 0)
 569                 fatal_exit("verbosity value < 0");
 570         if(cfg->num_threads <= 0 || cfg->num_threads > 10000)
 571                 fatal_exit("num_threads value weird");
 572         if(!cfg->do_ip4 && !cfg->do_ip6)
 573                 fatal_exit("ip4 and ip6 are both disabled, pointless");
 574         if(!cfg->do_ip4 && cfg->prefer_ip4)
 575                 fatal_exit("cannot prefer and disable ip4, pointless");
 576         if(!cfg->do_ip6 && cfg->prefer_ip6)
 577                 fatal_exit("cannot prefer and disable ip6, pointless");
 578         if(!cfg->do_udp && !cfg->do_tcp)
 579                 fatal_exit("udp and tcp are both disabled, pointless");
 580         if(cfg->edns_buffer_size > cfg->msg_buffer_size)
 581                 fatal_exit("edns-buffer-size larger than msg-buffer-size, "
 582                         "answers will not fit in processing buffer");
 583 #ifdef UB_ON_WINDOWS
 584         w_config_adjust_directory(cfg);
 585 #endif
 586         if(cfg->chrootdir && cfg->chrootdir[0] &&
 587                 cfg->chrootdir[strlen(cfg->chrootdir)-1] == '/')
 588                 fatal_exit("chootdir %s has trailing slash '/' please remove.",
 589                         cfg->chrootdir);
 590         if(cfg->chrootdir && cfg->chrootdir[0] &&
 591                 !is_dir(cfg->chrootdir)) {
 592                 fatal_exit("bad chroot directory");
 593         }
 594         if(cfg->directory && cfg->directory[0]) {
 595                 char* ad = fname_after_chroot(cfg->directory, cfg, 0);
 596                 if(!ad) fatal_exit("out of memory");
 597                 if(!is_dir(ad)) fatal_exit("bad chdir directory");
 598                 free(ad);
 599         }
 600         if( (cfg->chrootdir && cfg->chrootdir[0]) ||
 601             (cfg->directory && cfg->directory[0])) {
 602                 if(cfg->pidfile && cfg->pidfile[0]) {
 603                         char* ad = (cfg->pidfile[0]=='/')?strdup(cfg->pidfile):
 604                                 fname_after_chroot(cfg->pidfile, cfg, 1);
 605                         char* bd = basedir(ad);
 606                         if(bd && !is_dir(bd))
 607                                 fatal_exit("pidfile directory does not exist");
 608                         free(ad);
 609                 }
 610                 if(cfg->logfile && cfg->logfile[0]) {
 611                         char* ad = fname_after_chroot(cfg->logfile, cfg, 1);
 612                         char* bd = basedir(ad);
 613                         if(bd && !is_dir(bd))
 614                                 fatal_exit("logfile directory does not exist");
 615                         free(ad);
 616                 }
 617         }
 618
 619         check_chroot_filelist("file with root-hints",
 620                 cfg->root_hints, cfg->chrootdir, cfg);
 621         check_chroot_filelist("trust-anchor-file",
 622                 cfg->trust_anchor_file_list, cfg->chrootdir, cfg);
 623         check_chroot_filelist("auto-trust-anchor-file",
 624                 cfg->auto_trust_anchor_file_list, cfg->chrootdir, cfg);
 625         check_chroot_filelist_wild("trusted-keys-file",
 626                 cfg->trusted_keys_file_list, cfg->chrootdir, cfg);
 627         check_chroot_string("dlv-anchor-file", &cfg->dlv_anchor_file,
 628                 cfg->chrootdir, cfg);
 629 #ifdef USE_IPSECMOD
 630         if(cfg->ipsecmod_enabled && strstr(cfg->module_conf, "ipsecmod")) {
 631                 /* only check hook if enabled */
 632                 check_chroot_string("ipsecmod-hook", &cfg->ipsecmod_hook,
 633                         cfg->chrootdir, cfg);
 634         }
 635 #endif
 636         /* remove chroot setting so that modules are not stripping pathnames*/
 637         free(cfg->chrootdir);
 638         cfg->chrootdir = NULL;
 639
 640         /* check that the modules listed in module_conf exist */
 641         check_modules_exist(cfg->module_conf);
 642
 643         /* Respip is known to *not* work with dns64. */
 644         if(strcmp(cfg->module_conf, "iterator") != 0
 645                 && strcmp(cfg->module_conf, "validator iterator") != 0
 646                 && strcmp(cfg->module_conf, "dns64 validator iterator") != 0
 647                 && strcmp(cfg->module_conf, "dns64 iterator") != 0
 648                 && strcmp(cfg->module_conf, "respip iterator") != 0
 649                 && strcmp(cfg->module_conf, "respip validator iterator") != 0
 650 #ifdef WITH_PYTHONMODULE
 651                 && strcmp(cfg->module_conf, "python iterator") != 0
 652                 && strcmp(cfg->module_conf, "python respip iterator") != 0
 653                 && strcmp(cfg->module_conf, "python validator iterator") != 0
 654                 && strcmp(cfg->module_conf, "python respip validator iterator") != 0
 655                 && strcmp(cfg->module_conf, "validator python iterator") != 0
 656                 && strcmp(cfg->module_conf, "dns64 python iterator") != 0
 657                 && strcmp(cfg->module_conf, "dns64 python validator iterator") != 0
 658                 && strcmp(cfg->module_conf, "dns64 validator python iterator") != 0
 659                 && strcmp(cfg->module_conf, "python dns64 iterator") != 0
 660                 && strcmp(cfg->module_conf, "python dns64 validator iterator") != 0
 661 #endif
 662 #ifdef WITH_DYNLIBMODULE
 663                 && strcmp(cfg->module_conf, "dynlib iterator") != 0
 664                 && strcmp(cfg->module_conf, "dynlib dynlib iterator") != 0
 665                 && strcmp(cfg->module_conf, "dynlib dynlib dynlib iterator") != 0
 666                 && strcmp(cfg->module_conf, "python dynlib iterator") != 0
 667                 && strcmp(cfg->module_conf, "python dynlib dynlib iterator") != 0
 668                 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib iterator") != 0
 669                 && strcmp(cfg->module_conf, "dynlib respip iterator") != 0
 670                 && strcmp(cfg->module_conf, "dynlib validator iterator") != 0
 671                 && strcmp(cfg->module_conf, "dynlib dynlib validator iterator") != 0
 672                 && strcmp(cfg->module_conf, "dynlib dynlib dynlib validator iterator") != 0
 673                 && strcmp(cfg->module_conf, "python dynlib validator iterator") != 0
 674                 && strcmp(cfg->module_conf, "python dynlib dynlib validator iterator") != 0
 675                 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib validator iterator") != 0
 676                 && strcmp(cfg->module_conf, "dynlib respip validator iterator") != 0
 677                 && strcmp(cfg->module_conf, "validator dynlib iterator") != 0
 678                 && strcmp(cfg->module_conf, "dns64 dynlib iterator") != 0
 679                 && strcmp(cfg->module_conf, "dns64 dynlib validator iterator") != 0
 680                 && strcmp(cfg->module_conf, "dns64 validator dynlib iterator") != 0
 681                 && strcmp(cfg->module_conf, "dynlib dns64 iterator") != 0
 682                 && strcmp(cfg->module_conf, "dynlib dns64 validator iterator") != 0
 683                 && strcmp(cfg->module_conf, "dynlib dns64 cachedb iterator") != 0
 684                 && strcmp(cfg->module_conf, "dynlib dns64 validator cachedb iterator") != 0
 685                 && strcmp(cfg->module_conf, "dns64 dynlib cachedb iterator") != 0
 686                 && strcmp(cfg->module_conf, "dns64 dynlib validator cachedb iterator") != 0
 687                 && strcmp(cfg->module_conf, "dynlib cachedb iterator") != 0
 688                 && strcmp(cfg->module_conf, "dynlib respip cachedb iterator") != 0
 689                 && strcmp(cfg->module_conf, "dynlib validator cachedb iterator") != 0
 690                 && strcmp(cfg->module_conf, "dynlib respip validator cachedb iterator") != 0
 691                 && strcmp(cfg->module_conf, "cachedb dynlib iterator") != 0
 692                 && strcmp(cfg->module_conf, "respip cachedb dynlib iterator") != 0
 693                 && strcmp(cfg->module_conf, "validator cachedb dynlib iterator") != 0
 694                 && strcmp(cfg->module_conf, "respip validator cachedb dynlib iterator") != 0
 695                 && strcmp(cfg->module_conf, "validator dynlib cachedb iterator") != 0
 696                 && strcmp(cfg->module_conf, "respip validator dynlib cachedb iterator") != 0
 697                 && strcmp(cfg->module_conf, "dynlib subnetcache iterator") != 0
 698                 && strcmp(cfg->module_conf, "dynlib respip subnetcache iterator") != 0
 699                 && strcmp(cfg->module_conf, "subnetcache dynlib iterator") != 0
 700                 && strcmp(cfg->module_conf, "respip subnetcache dynlib iterator") != 0
 701                 && strcmp(cfg->module_conf, "dynlib subnetcache validator iterator") != 0
 702                 && strcmp(cfg->module_conf, "dynlib respip subnetcache validator iterator") != 0
 703                 && strcmp(cfg->module_conf, "subnetcache dynlib validator iterator") != 0
 704                 && strcmp(cfg->module_conf, "respip subnetcache dynlib validator iterator") != 0
 705                 && strcmp(cfg->module_conf, "subnetcache validator dynlib iterator") != 0
 706                 && strcmp(cfg->module_conf, "respip subnetcache validator dynlib iterator") != 0
 707                 && strcmp(cfg->module_conf, "dynlib ipsecmod iterator") != 0
 708                 && strcmp(cfg->module_conf, "dynlib ipsecmod respip iterator") != 0
 709                 && strcmp(cfg->module_conf, "ipsecmod dynlib iterator") != 0
 710                 && strcmp(cfg->module_conf, "ipsecmod dynlib respip iterator") != 0
 711                 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0
 712                 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0
 713                 && strcmp(cfg->module_conf, "dynlib ipsecmod validator iterator") != 0
 714                 && strcmp(cfg->module_conf, "dynlib ipsecmod respip validator iterator") != 0
 715                 && strcmp(cfg->module_conf, "ipsecmod dynlib validator iterator") != 0
 716                 && strcmp(cfg->module_conf, "ipsecmod dynlib respip validator iterator") != 0
 717                 && strcmp(cfg->module_conf, "ipsecmod validator dynlib iterator") != 0
 718                 && strcmp(cfg->module_conf, "ipsecmod respip validator dynlib iterator") != 0
 719 #endif
 720 #ifdef USE_CACHEDB
 721                 && strcmp(cfg->module_conf, "validator cachedb iterator") != 0
 722                 && strcmp(cfg->module_conf, "respip validator cachedb iterator") != 0
 723                 && strcmp(cfg->module_conf, "cachedb iterator") != 0
 724                 && strcmp(cfg->module_conf, "respip cachedb iterator") != 0
 725                 && strcmp(cfg->module_conf, "dns64 validator cachedb iterator") != 0
 726                 && strcmp(cfg->module_conf, "dns64 cachedb iterator") != 0
 727 #endif
 728 #if defined(WITH_PYTHONMODULE) && defined(USE_CACHEDB)
 729                 && strcmp(cfg->module_conf, "python dns64 cachedb iterator") != 0
 730                 && strcmp(cfg->module_conf, "python dns64 validator cachedb iterator") != 0
 731                 && strcmp(cfg->module_conf, "dns64 python cachedb iterator") != 0
 732                 && strcmp(cfg->module_conf, "dns64 python validator cachedb iterator") != 0
 733                 && strcmp(cfg->module_conf, "python cachedb iterator") != 0
 734                 && strcmp(cfg->module_conf, "python respip cachedb iterator") != 0
 735                 && strcmp(cfg->module_conf, "python validator cachedb iterator") != 0
 736                 && strcmp(cfg->module_conf, "python respip validator cachedb iterator") != 0
 737                 && strcmp(cfg->module_conf, "cachedb python iterator") != 0
 738                 && strcmp(cfg->module_conf, "respip cachedb python iterator") != 0
 739                 && strcmp(cfg->module_conf, "validator cachedb python iterator") != 0
 740                 && strcmp(cfg->module_conf, "respip validator cachedb python iterator") != 0
 741                 && strcmp(cfg->module_conf, "validator python cachedb iterator") != 0
 742                 && strcmp(cfg->module_conf, "respip validator python cachedb iterator") != 0
 743 #endif
 744 #ifdef CLIENT_SUBNET
 745                 && strcmp(cfg->module_conf, "subnetcache iterator") != 0
 746                 && strcmp(cfg->module_conf, "respip subnetcache iterator") != 0
 747                 && strcmp(cfg->module_conf, "subnetcache validator iterator") != 0
 748                 && strcmp(cfg->module_conf, "respip subnetcache validator iterator") != 0
 749                 && strcmp(cfg->module_conf, "dns64 subnetcache iterator") != 0
 750                 && strcmp(cfg->module_conf, "dns64 subnetcache validator iterator") != 0
 751                 && strcmp(cfg->module_conf, "dns64 subnetcache respip iterator") != 0
 752                 && strcmp(cfg->module_conf, "dns64 subnetcache respip validator iterator") != 0
 753 #endif
 754 #if defined(WITH_PYTHONMODULE) && defined(CLIENT_SUBNET)
 755                 && strcmp(cfg->module_conf, "python subnetcache iterator") != 0
 756                 && strcmp(cfg->module_conf, "python respip subnetcache iterator") != 0
 757                 && strcmp(cfg->module_conf, "subnetcache python iterator") != 0
 758                 && strcmp(cfg->module_conf, "respip subnetcache python iterator") != 0
 759                 && strcmp(cfg->module_conf, "python subnetcache validator iterator") != 0
 760                 && strcmp(cfg->module_conf, "python respip subnetcache validator iterator") != 0
 761                 && strcmp(cfg->module_conf, "subnetcache python validator iterator") != 0
 762                 && strcmp(cfg->module_conf, "respip subnetcache python validator iterator") != 0
 763                 && strcmp(cfg->module_conf, "subnetcache validator python iterator") != 0
 764                 && strcmp(cfg->module_conf, "respip subnetcache validator python iterator") != 0
 765 #endif
 766 #ifdef USE_IPSECMOD
 767                 && strcmp(cfg->module_conf, "ipsecmod iterator") != 0
 768                 && strcmp(cfg->module_conf, "ipsecmod respip iterator") != 0
 769                 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0
 770                 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0
 771 #endif
 772 #if defined(WITH_PYTHONMODULE) && defined(USE_IPSECMOD)
 773                 && strcmp(cfg->module_conf, "python ipsecmod iterator") != 0
 774                 && strcmp(cfg->module_conf, "python ipsecmod respip iterator") != 0
 775                 && strcmp(cfg->module_conf, "ipsecmod python iterator") != 0
 776                 && strcmp(cfg->module_conf, "ipsecmod python respip iterator") != 0
 777                 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0
 778                 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0
 779                 && strcmp(cfg->module_conf, "python ipsecmod validator iterator") != 0
 780                 && strcmp(cfg->module_conf, "python ipsecmod respip validator iterator") != 0
 781                 && strcmp(cfg->module_conf, "ipsecmod python validator iterator") != 0
 782                 && strcmp(cfg->module_conf, "ipsecmod python respip validator iterator") != 0
 783                 && strcmp(cfg->module_conf, "ipsecmod validator python iterator") != 0
 784                 && strcmp(cfg->module_conf, "ipsecmod respip validator python iterator") != 0
 785 #endif
 786 #ifdef USE_IPSET
 787                 && strcmp(cfg->module_conf, "validator ipset iterator") != 0
 788                 && strcmp(cfg->module_conf, "validator ipset respip iterator") != 0
 789                 && strcmp(cfg->module_conf, "ipset iterator") != 0
 790                 && strcmp(cfg->module_conf, "ipset respip iterator") != 0
 791 #endif
 792                 ) {
 793                 fatal_exit("module conf '%s' is not known to work",
 794                         cfg->module_conf);
 795         }
 796
 797 #ifdef HAVE_GETPWNAM
 798         if(cfg->username && cfg->username[0]) {
 799                 if(getpwnam(cfg->username) == NULL)
 800                         fatal_exit("user '%s' does not exist.", cfg->username);
 801 #  ifdef HAVE_ENDPWENT
 802                 endpwent();
 803 #  endif
 804         }
 805 #endif
 806         if(cfg->remote_control_enable && options_remote_is_address(cfg)
 807                 && cfg->control_use_cert) {
 808                 check_chroot_string("server-key-file", &cfg->server_key_file,
 809                         cfg->chrootdir, cfg);
 810                 check_chroot_string("server-cert-file", &cfg->server_cert_file,
 811                         cfg->chrootdir, cfg);
 812                 if(!is_file(cfg->control_key_file))
 813                         fatal_exit("control-key-file: \"%s\" does not exist",
 814                                 cfg->control_key_file);
 815                 if(!is_file(cfg->control_cert_file))
 816                         fatal_exit("control-cert-file: \"%s\" does not exist",
 817                                 cfg->control_cert_file);
 818         }
 819
 820         donotquerylocalhostcheck(cfg);
 821         localzonechecks(cfg);
 822         view_and_respipchecks(cfg);
 823 #ifdef CLIENT_SUBNET
 824         ecs_conf_checks(cfg);
 825 #endif
 826 }
 827
 828 /** check forwards */
 829 static void
 830 check_fwd(struct config_file* cfg)
 831 {
 832         struct iter_forwards* fwd = forwards_create();
 833         if(!fwd || !forwards_apply_cfg(fwd, cfg)) {
 834                 fatal_exit("Could not set forward zones");
 835         }
 836         forwards_delete(fwd);
 837 }
 838
 839 /** check hints */
 840 static void
 841 check_hints(struct config_file* cfg)
 842 {
 843         struct iter_hints* hints = hints_create();
 844         if(!hints || !hints_apply_cfg(hints, cfg)) {
 845                 fatal_exit("Could not set root or stub hints");
 846         }
 847         hints_delete(hints);
 848 }
 849
 850 /** check auth zones */
 851 static void
 852 check_auth(struct config_file* cfg)
 853 {
 854         int is_rpz = 0;
 855         struct auth_zones* az = auth_zones_create();
 856         if(!az || !auth_zones_apply_cfg(az, cfg, 0, &is_rpz)) {
 857                 fatal_exit("Could not setup authority zones");
 858         }
 859         auth_zones_delete(az);
 860 }
 861
 862 /** check config file */
 863 static void
 864 checkconf(const char* cfgfile, const char* opt, int final)
 865 {
 866         char oldwd[4096];
 867         struct config_file* cfg = config_create();
 868         if(!cfg)
 869                 fatal_exit("out of memory");
 870         oldwd[0] = 0;
 871         if(!getcwd(oldwd, sizeof(oldwd))) {
 872                 log_err("cannot getcwd: %s", strerror(errno));
 873                 oldwd[0] = 0;
 874         }
 875         if(!config_read(cfg, cfgfile, NULL)) {
 876                 /* config_read prints messages to stderr */
 877                 config_delete(cfg);
 878                 exit(1);
 879         }
 880         if(oldwd[0] && chdir(oldwd) == -1)
 881                 log_err("cannot chdir(%s): %s", oldwd, strerror(errno));
 882         if(opt) {
 883                 print_option(cfg, opt, final);
 884                 config_delete(cfg);
 885                 return;
 886         }
 887         morechecks(cfg);
 888         check_mod(cfg, iter_get_funcblock());
 889         check_mod(cfg, val_get_funcblock());
 890 #ifdef WITH_PYTHONMODULE
 891         if(strstr(cfg->module_conf, "python"))
 892                 check_mod(cfg, pythonmod_get_funcblock());
 893 #endif
 894         check_fwd(cfg);
 895         check_hints(cfg);
 896         check_auth(cfg);
 897         printf("unbound-checkconf: no errors in %s\n", cfgfile);
 898         config_delete(cfg);
 899 }
 900
 901 /** getopt global, in case header files fail to declare it. */
 902 extern int optind;
 903 /** getopt global, in case header files fail to declare it. */
 904 extern char* optarg;
 905
 906 /** Main routine for checkconf */
 907 int main(int argc, char* argv[])
 908 {
 909         int c;
 910         int final = 0;
 911         const char* f;
 912         const char* opt = NULL;
 913         const char* cfgfile = CONFIGFILE;
 914         log_ident_set("unbound-checkconf");
 915         log_init(NULL, 0, NULL);
 916         checklock_start();
 917 #ifdef USE_WINSOCK
 918         /* use registry config file in preference to compiletime location */
 919         if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile")))
 920                 cfgfile = CONFIGFILE;
 921 #endif /* USE_WINSOCK */
 922         /* parse the options */
 923         while( (c=getopt(argc, argv, "fho:")) != -1) {
 924                 switch(c) {
 925                 case 'f':
 926                         final = 1;
 927                         break;
 928                 case 'o':
 929                         opt = optarg;
 930                         break;
 931                 case '?':
 932                 case 'h':
 933                 default:
 934                         usage();
 935                 }
 936         }
 937         argc -= optind;
 938         argv += optind;
 939         if(argc != 0 && argc != 1)
 940                 usage();
 941         if(argc == 1)
 942                 f = argv[0];
 943         else    f = cfgfile;
 944         checkconf(f, opt, final);
 945         checklock_stop();
 946         return 0;
 947 }