contrib/unbound/smallapp/unbound-checkconf.c

   1 /*
   2  * smallapp/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/listen_dnsport.h"
  58 #include "services/view.h"
  59 #include "services/authzone.h"
  60 #include "respip/respip.h"
  61 #include "sldns/sbuffer.h"
  62 #include "sldns/str2wire.h"
  63 #ifdef HAVE_GETOPT_H
  64 #include <getopt.h>
  65 #endif
  66 #ifdef HAVE_PWD_H
  67 #include <pwd.h>
  68 #endif
  69 #ifdef HAVE_SYS_STAT_H
  70 #include <sys/stat.h>
  71 #endif
  72 #ifdef HAVE_GLOB_H
  73 #include <glob.h>
  74 #endif
  75 #ifdef WITH_PYTHONMODULE
  76 #include "pythonmod/pythonmod.h"
  77 #endif
  78 #ifdef CLIENT_SUBNET
  79 #include "edns-subnet/subnet-whitelist.h"
  80 #endif
  81
  82 /** Give checkconf usage, and exit (1). */
  83 static void
  84 usage(void)
  85 {
  86         printf("Usage:  local-unbound-checkconf [file]\n");
  87         printf("        Checks unbound configuration file for errors.\n");
  88         printf("file    if omitted %s is used.\n", CONFIGFILE);
  89         printf("-o option       print value of option to stdout.\n");
  90         printf("-f              output full pathname with chroot applied, eg. with -o pidfile.\n");
  91         printf("-h              show this usage help.\n");
  92         printf("Version %s\n", PACKAGE_VERSION);
  93         printf("BSD licensed, see LICENSE in source package for details.\n");
  94         printf("Report bugs to %s\n", PACKAGE_BUGREPORT);
  95         exit(1);
  96 }
  97
  98 /**
  99  * Print given option to stdout
 100  * @param cfg: config
 101  * @param opt: option name without trailing :.
 102  *      This is different from config_set_option.
 103  * @param final: if final pathname with chroot applied has to be printed.
 104  */
 105 static void
 106 print_option(struct config_file* cfg, const char* opt, int final)
 107 {
 108         if(strcmp(opt, "pidfile") == 0 && final) {
 109                 char *p = fname_after_chroot(cfg->pidfile, cfg, 1);
 110                 if(!p) fatal_exit("out of memory");
 111                 printf("%s\n", p);
 112                 free(p);
 113                 return;
 114         }
 115         if(strcmp(opt, "auto-trust-anchor-file") == 0 && final) {
 116                 struct config_strlist* s = cfg->auto_trust_anchor_file_list;
 117                 for(; s; s=s->next) {
 118                         char *p = fname_after_chroot(s->str, cfg, 1);
 119                         if(!p) fatal_exit("out of memory");
 120                         printf("%s\n", p);
 121                         free(p);
 122                 }
 123                 return;
 124         }
 125         if(!config_get_option(cfg, opt, config_print_func, stdout))
 126                 fatal_exit("cannot print option '%s'", opt);
 127 }
 128
 129 /** check if module works with config */
 130 static void
 131 check_mod(struct config_file* cfg, struct module_func_block* fb)
 132 {
 133         struct module_env env;
 134         memset(&env, 0, sizeof(env));
 135         env.cfg = cfg;
 136         env.scratch = regional_create();
 137         env.scratch_buffer = sldns_buffer_new(BUFSIZ);
 138         if(!env.scratch || !env.scratch_buffer)
 139                 fatal_exit("out of memory");
 140         if(!edns_known_options_init(&env))
 141                 fatal_exit("out of memory");
 142         if(!(*fb->init)(&env, 0)) {
 143                 fatal_exit("bad config for %s module", fb->name);
 144         }
 145         (*fb->deinit)(&env, 0);
 146         sldns_buffer_free(env.scratch_buffer);
 147         regional_destroy(env.scratch);
 148         edns_known_options_delete(&env);
 149 }
 150
 151 /** true if addr is a localhost address, 127.0.0.1 or ::1 (with maybe "@port"
 152  * after it) */
 153 static int
 154 str_addr_is_localhost(const char* a)
 155 {
 156         if(strncmp(a, "127.", 4) == 0) return 1;
 157         if(strncmp(a, "::1", 3) == 0) return 1;
 158         return 0;
 159 }
 160
 161 /** check do-not-query-localhost */
 162 static void
 163 donotquerylocalhostcheck(struct config_file* cfg)
 164 {
 165         if(cfg->donotquery_localhost) {
 166                 struct config_stub* p;
 167                 struct config_strlist* s;
 168                 for(p=cfg->forwards; p; p=p->next) {
 169                         for(s=p->addrs; s; s=s->next) {
 170                                 if(str_addr_is_localhost(s->str)) {
 171                                         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",
 172                                                 s->str, p->name);
 173                                 }
 174                         }
 175                 }
 176                 for(p=cfg->stubs; p; p=p->next) {
 177                         for(s=p->addrs; s; s=s->next) {
 178                                 if(str_addr_is_localhost(s->str)) {
 179                                         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",
 180                                                 s->str, p->name);
 181                                 }
 182                         }
 183                 }
 184         }
 185 }
 186
 187 /** check localzones */
 188 static void
 189 localzonechecks(struct config_file* cfg)
 190 {
 191         struct local_zones* zs;
 192         if(!(zs = local_zones_create()))
 193                 fatal_exit("out of memory");
 194         if(!local_zones_apply_cfg(zs, cfg))
 195                 fatal_exit("failed local-zone, local-data configuration");
 196         local_zones_delete(zs);
 197 }
 198
 199 /** checks for acl and views */
 200 static void
 201 acl_view_tag_checks(struct config_file* cfg, struct views* views)
 202 {
 203         int d;
 204         struct sockaddr_storage a;
 205         socklen_t alen;
 206         struct config_str2list* acl;
 207         struct config_str3list* s3;
 208         struct config_strbytelist* sb;
 209
 210         /* acl_view */
 211         for(acl=cfg->acl_view; acl; acl = acl->next) {
 212                 struct view* v;
 213                 if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen,
 214                         &d)) {
 215                         fatal_exit("cannot parse access-control-view "
 216                                 "address %s %s", acl->str, acl->str2);
 217                 }
 218                 v = views_find_view(views, acl->str2, 0);
 219                 if(!v) {
 220                         fatal_exit("cannot find view for "
 221                                 "access-control-view: %s %s",
 222                                 acl->str, acl->str2);
 223                 }
 224                 lock_rw_unlock(&v->lock);
 225         }
 226
 227         /* acl_tags */
 228         for(sb=cfg->acl_tags; sb; sb = sb->next) {
 229                 if(!netblockstrtoaddr(sb->str, UNBOUND_DNS_PORT, &a, &alen,
 230                         &d)) {
 231                         fatal_exit("cannot parse access-control-tags "
 232                                 "address %s", sb->str);
 233                 }
 234         }
 235
 236         /* acl_tag_actions */
 237         for(s3=cfg->acl_tag_actions; s3; s3 = s3->next) {
 238                 enum localzone_type t;
 239                 if(!netblockstrtoaddr(s3->str, UNBOUND_DNS_PORT, &a, &alen,
 240                         &d)) {
 241                         fatal_exit("cannot parse access-control-tag-actions "
 242                                 "address %s %s %s",
 243                                 s3->str, s3->str2, s3->str3);
 244                 }
 245                 if(find_tag_id(cfg, s3->str2) == -1) {
 246                         fatal_exit("cannot parse tag %s (define-tag it), "
 247                                 "for access-control-tag-actions: %s %s %s",
 248                                 s3->str2, s3->str, s3->str2, s3->str3);
 249                 }
 250                 if(!local_zone_str2type(s3->str3, &t)) {
 251                         fatal_exit("cannot parse access control action type %s"
 252                                 " for access-control-tag-actions: %s %s %s",
 253                                 s3->str3, s3->str, s3->str2, s3->str3);
 254                 }
 255         }
 256
 257         /* acl_tag_datas */
 258         for(s3=cfg->acl_tag_datas; s3; s3 = s3->next) {
 259                 char buf[65536];
 260                 uint8_t rr[LDNS_RR_BUF_SIZE];
 261                 size_t len = sizeof(rr);
 262                 int res;
 263                 if(!netblockstrtoaddr(s3->str, UNBOUND_DNS_PORT, &a, &alen,
 264                         &d)) {
 265                         fatal_exit("cannot parse access-control-tag-datas address %s %s '%s'",
 266                                 s3->str, s3->str2, s3->str3);
 267                 }
 268                 if(find_tag_id(cfg, s3->str2) == -1) {
 269                         fatal_exit("cannot parse tag %s (define-tag it), "
 270                                 "for access-control-tag-datas: %s %s '%s'",
 271                                 s3->str2, s3->str, s3->str2, s3->str3);
 272                 }
 273                 /* '.' is sufficient for validation, and it makes the call to
 274                  * sldns_wirerr_get_type() simpler below. */
 275                 snprintf(buf, sizeof(buf), "%s %s", ".", s3->str3);
 276                 res = sldns_str2wire_rr_buf(buf, rr, &len, NULL, 3600, NULL,
 277                         0, NULL, 0);
 278                 if(res != 0) {
 279                         fatal_exit("cannot parse rr data [char %d] parse error %s, for access-control-tag-datas: %s %s '%s'",
 280                                 (int)LDNS_WIREPARSE_OFFSET(res)-2,
 281                                 sldns_get_errorstr_parse(res),
 282                                 s3->str, s3->str2, s3->str3);
 283                 }
 284         }
 285 }
 286
 287 /** check view and response-ip configuration */
 288 static void
 289 view_and_respipchecks(struct config_file* cfg)
 290 {
 291         struct views* views = NULL;
 292         struct respip_set* respip = NULL;
 293         int ignored = 0;
 294         if(!(views = views_create()))
 295                 fatal_exit("Could not create views: out of memory");
 296         if(!(respip = respip_set_create()))
 297                 fatal_exit("Could not create respip set: out of memory");
 298         if(!views_apply_cfg(views, cfg))
 299                 fatal_exit("Could not set up views");
 300         if(!respip_global_apply_cfg(respip, cfg))
 301                 fatal_exit("Could not setup respip set");
 302         if(!respip_views_apply_cfg(views, cfg, &ignored))
 303                 fatal_exit("Could not setup per-view respip sets");
 304         acl_view_tag_checks(cfg, views);
 305         views_delete(views);
 306         respip_set_delete(respip);
 307 }
 308
 309 /** emit warnings for IP in hosts */
 310 static void
 311 warn_hosts(const char* typ, struct config_stub* list)
 312 {
 313         struct sockaddr_storage a;
 314         socklen_t alen;
 315         struct config_stub* s;
 316         struct config_strlist* h;
 317         for(s=list; s; s=s->next) {
 318                 for(h=s->hosts; h; h=h->next) {
 319                         if(extstrtoaddr(h->str, &a, &alen, UNBOUND_DNS_PORT)) {
 320                                 fprintf(stderr, "unbound-checkconf: warning:"
 321                                   " %s %s: \"%s\" is an IP%s address, "
 322                                   "and when looked up as a host name "
 323                                   "during use may not resolve.\n",
 324                                   s->name, typ, h->str,
 325                                   addr_is_ip6(&a, alen)?"6":"4");
 326                         }
 327                 }
 328         }
 329 }
 330
 331 /** check interface strings */
 332 static void
 333 interfacechecks(struct config_file* cfg)
 334 {
 335         int d;
 336         struct sockaddr_storage a;
 337         socklen_t alen;
 338         int i, j, i2, j2;
 339         char*** resif = NULL;
 340         int* num_resif = NULL;
 341         char portbuf[32];
 342         snprintf(portbuf, sizeof(portbuf), "%d", cfg->port);
 343
 344         if(cfg->num_ifs != 0) {
 345                 resif = (char***)calloc(cfg->num_ifs, sizeof(char**));
 346                 if(!resif) fatal_exit("malloc failure");
 347                 num_resif = (int*)calloc(cfg->num_ifs, sizeof(int));
 348                 if(!num_resif) fatal_exit("malloc failure");
 349         }
 350         for(i=0; i<cfg->num_ifs; i++) {
 351                 /* search for duplicates in IP or ifname arguments */
 352                 for(i2=0; i2<i; i2++) {
 353                         if(strcmp(cfg->ifs[i], cfg->ifs[i2]) == 0) {
 354                                 fatal_exit("interface: %s present twice, "
 355                                         "cannot bind same ports twice.",
 356                                         cfg->ifs[i]);
 357                         }
 358                 }
 359                 if(!resolve_interface_names(&cfg->ifs[i], 1, NULL, &resif[i],
 360                         &num_resif[i])) {
 361                         fatal_exit("could not resolve interface names, for %s",
 362                                 cfg->ifs[i]);
 363                 }
 364                 /* check for port combinations that are not supported */
 365                 if(if_is_pp2(resif[i][0], portbuf, cfg->proxy_protocol_port)) {
 366                         if(if_is_dnscrypt(resif[i][0], portbuf,
 367                                 cfg->dnscrypt_port)) {
 368                                 fatal_exit("PROXYv2 and DNSCrypt combination not "
 369                                         "supported!");
 370                         } else if(if_is_https(resif[i][0], portbuf,
 371                                 cfg->https_port)) {
 372                                 fatal_exit("PROXYv2 and DoH combination not "
 373                                         "supported!");
 374                         }
 375                 }
 376                 /* search for duplicates in the returned addresses */
 377                 for(j=0; j<num_resif[i]; j++) {
 378                         if(!extstrtoaddr(resif[i][j], &a, &alen, cfg->port)) {
 379                                 if(strcmp(cfg->ifs[i], resif[i][j]) != 0)
 380                                         fatal_exit("cannot parse interface address '%s' from the interface specified as '%s'",
 381                                                 resif[i][j], cfg->ifs[i]);
 382                                 else
 383                                         fatal_exit("cannot parse interface specified as '%s'",
 384                                                 cfg->ifs[i]);
 385                         }
 386                         for(i2=0; i2<i; i2++) {
 387                                 for(j2=0; j2<num_resif[i2]; j2++) {
 388                                         if(strcmp(resif[i][j], resif[i2][j2])
 389                                                 == 0) {
 390                                                 char info1[1024], info2[1024];
 391                                                 if(strcmp(cfg->ifs[i], resif[i][j]) != 0)
 392                                                         snprintf(info1, sizeof(info1), "address %s from interface: %s", resif[i][j], cfg->ifs[i]);
 393                                                 else    snprintf(info1, sizeof(info1), "interface: %s", cfg->ifs[i]);
 394                                                 if(strcmp(cfg->ifs[i2], resif[i2][j2]) != 0)
 395                                                         snprintf(info2, sizeof(info2), "address %s from interface: %s", resif[i2][j2], cfg->ifs[i2]);
 396                                                 else    snprintf(info2, sizeof(info2), "interface: %s", cfg->ifs[i2]);
 397                                                 fatal_exit("%s present twice, cannot bind the same ports twice. The first entry is %s and the second is %s", resif[i][j], info2, info1);
 398                                         }
 399                                 }
 400                         }
 401                 }
 402         }
 403
 404         for(i=0; i<cfg->num_ifs; i++) {
 405                 config_del_strarray(resif[i], num_resif[i]);
 406         }
 407         free(resif);
 408         free(num_resif);
 409
 410         for(i=0; i<cfg->num_out_ifs; i++) {
 411                 if(!ipstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen) &&
 412                    !netblockstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen, &d)) {
 413                         fatal_exit("cannot parse outgoing-interface "
 414                                 "specified as '%s'", cfg->out_ifs[i]);
 415                 }
 416                 for(j=0; j<cfg->num_out_ifs; j++) {
 417                         if(i!=j && strcmp(cfg->out_ifs[i], cfg->out_ifs[j])==0)
 418                                 fatal_exit("outgoing-interface: %s present "
 419                                         "twice, cannot bind same ports twice.",
 420                                         cfg->out_ifs[i]);
 421                 }
 422         }
 423 }
 424
 425 /** check interface-automatic-ports */
 426 static void
 427 ifautomaticportschecks(char* ifautomaticports)
 428 {
 429         char* now = ifautomaticports;
 430         while(now && *now) {
 431                 char* after;
 432                 int extraport;
 433                 while(isspace((unsigned char)*now))
 434                         now++;
 435                 if(!*now)
 436                         break;
 437                 after = now;
 438                 extraport = (int)strtol(now, &after, 10);
 439                 if(extraport < 0 || extraport > 65535)
 440                         fatal_exit("interface-automatic-ports: port out of range at position %d in '%s'", (int)(now-ifautomaticports)+1, ifautomaticports);
 441                 if(extraport == 0 && now == after)
 442                         fatal_exit("interface-automatic-ports: parse error at position %d in '%s'", (int)(now-ifautomaticports)+1, ifautomaticports);
 443                 now = after;
 444         }
 445 }
 446
 447 /** check acl ips */
 448 static void
 449 aclchecks(struct config_file* cfg)
 450 {
 451         int d;
 452         struct sockaddr_storage a;
 453         socklen_t alen;
 454         struct config_str2list* acl;
 455         for(acl=cfg->acls; acl; acl = acl->next) {
 456                 if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen,
 457                         &d)) {
 458                         fatal_exit("cannot parse access control address %s %s",
 459                                 acl->str, acl->str2);
 460                 }
 461         }
 462 }
 463
 464 /** check tcp connection limit ips */
 465 static void
 466 tcpconnlimitchecks(struct config_file* cfg)
 467 {
 468         int d;
 469         struct sockaddr_storage a;
 470         socklen_t alen;
 471         struct config_str2list* tcl;
 472         for(tcl=cfg->tcp_connection_limits; tcl; tcl = tcl->next) {
 473                 if(!netblockstrtoaddr(tcl->str, UNBOUND_DNS_PORT, &a, &alen,
 474                         &d)) {
 475                         fatal_exit("cannot parse tcp connection limit address %s %s",
 476                                 tcl->str, tcl->str2);
 477                 }
 478         }
 479 }
 480
 481 /** true if fname is a file */
 482 static int
 483 is_file(const char* fname)
 484 {
 485         struct stat buf;
 486         if(stat(fname, &buf) < 0) {
 487                 if(errno==EACCES) {
 488                         printf("warning: no search permission for one of the directories in path: %s\n", fname);
 489                         return 1;
 490                 }
 491                 perror(fname);
 492                 return 0;
 493         }
 494         if(S_ISDIR(buf.st_mode)) {
 495                 printf("%s is not a file\n", fname);
 496                 return 0;
 497         }
 498         return 1;
 499 }
 500
 501 /** true if fname is a directory */
 502 static int
 503 is_dir(const char* fname)
 504 {
 505         struct stat buf;
 506         if(stat(fname, &buf) < 0) {
 507                 if(errno==EACCES) {
 508                         printf("warning: no search permission for one of the directories in path: %s\n", fname);
 509                         return 1;
 510                 }
 511                 perror(fname);
 512                 return 0;
 513         }
 514         if(!(S_ISDIR(buf.st_mode))) {
 515                 printf("%s is not a directory\n", fname);
 516                 return 0;
 517         }
 518         return 1;
 519 }
 520
 521 /** get base dir of a fname */
 522 static char*
 523 basedir(char* fname)
 524 {
 525         char* rev;
 526         if(!fname) fatal_exit("out of memory");
 527         rev = strrchr(fname, '/');
 528         if(!rev) return NULL;
 529         if(fname == rev) return NULL;
 530         rev[0] = 0;
 531         return fname;
 532 }
 533
 534 /** check chroot for a file string */
 535 static void
 536 check_chroot_string(const char* desc, char** ss,
 537         const char* chrootdir, struct config_file* cfg)
 538 {
 539         char* str = *ss;
 540         if(str && str[0]) {
 541                 *ss = fname_after_chroot(str, cfg, 1);
 542                 if(!*ss) fatal_exit("out of memory");
 543                 if(!is_file(*ss)) {
 544                         if(chrootdir && chrootdir[0])
 545                                 fatal_exit("%s: \"%s\" does not exist in "
 546                                         "chrootdir %s", desc, str, chrootdir);
 547                         else
 548                                 fatal_exit("%s: \"%s\" does not exist",
 549                                         desc, str);
 550                 }
 551                 /* put in a new full path for continued checking */
 552                 free(str);
 553         }
 554 }
 555
 556 /** check file list, every file must be inside the chroot location */
 557 static void
 558 check_chroot_filelist(const char* desc, struct config_strlist* list,
 559         const char* chrootdir, struct config_file* cfg)
 560 {
 561         struct config_strlist* p;
 562         for(p=list; p; p=p->next) {
 563                 check_chroot_string(desc, &p->str, chrootdir, cfg);
 564         }
 565 }
 566
 567 /** check file list, with wildcard processing */
 568 static void
 569 check_chroot_filelist_wild(const char* desc, struct config_strlist* list,
 570         const char* chrootdir, struct config_file* cfg)
 571 {
 572         struct config_strlist* p;
 573         for(p=list; p; p=p->next) {
 574 #ifdef HAVE_GLOB
 575                 if(strchr(p->str, '*') || strchr(p->str, '[') ||
 576                         strchr(p->str, '?') || strchr(p->str, '{') ||
 577                         strchr(p->str, '~')) {
 578                         char* s = p->str;
 579                         /* adjust whole pattern for chroot and check later */
 580                         p->str = fname_after_chroot(p->str, cfg, 1);
 581                         free(s);
 582                 } else
 583 #endif /* HAVE_GLOB */
 584                         check_chroot_string(desc, &p->str, chrootdir, cfg);
 585         }
 586 }
 587
 588 #ifdef CLIENT_SUBNET
 589 /** check ECS configuration */
 590 static void
 591 ecs_conf_checks(struct config_file* cfg)
 592 {
 593         struct ecs_whitelist* whitelist = NULL;
 594         if(!(whitelist = ecs_whitelist_create()))
 595                 fatal_exit("Could not create ednssubnet whitelist: out of memory");
 596         if(!ecs_whitelist_apply_cfg(whitelist, cfg))
 597                 fatal_exit("Could not setup ednssubnet whitelist");
 598         ecs_whitelist_delete(whitelist);
 599 }
 600 #endif /* CLIENT_SUBNET */
 601
 602 /** check that the modules exist, are compiled in */
 603 static void
 604 check_modules_exist(const char* module_conf)
 605 {
 606         const char** names = module_list_avail();
 607         const char* s = module_conf;
 608         while(*s) {
 609                 int i = 0;
 610                 int is_ok = 0;
 611                 while(*s && isspace((unsigned char)*s))
 612                         s++;
 613                 if(!*s) break;
 614                 while(names[i]) {
 615                         if(strncmp(names[i], s, strlen(names[i])) == 0) {
 616                                 is_ok = 1;
 617                                 break;
 618                         }
 619                         i++;
 620                 }
 621                 if(is_ok == 0) {
 622                         char n[64];
 623                         size_t j;
 624                         n[0]=0;
 625                         n[sizeof(n)-1]=0;
 626                         for(j=0; j<sizeof(n)-1; j++) {
 627                                 if(!s[j] || isspace((unsigned char)s[j])) {
 628                                         n[j] = 0;
 629                                         break;
 630                                 }
 631                                 n[j] = s[j];
 632                         }
 633                         fatal_exit("module_conf lists module '%s' but that "
 634                                 "module is not available.", n);
 635                 }
 636                 s += strlen(names[i]);
 637         }
 638 }
 639
 640 /** check configuration for errors */
 641 static void
 642 morechecks(struct config_file* cfg)
 643 {
 644         warn_hosts("stub-host", cfg->stubs);
 645         warn_hosts("forward-host", cfg->forwards);
 646         interfacechecks(cfg);
 647         ifautomaticportschecks(cfg->if_automatic_ports);
 648         aclchecks(cfg);
 649         tcpconnlimitchecks(cfg);
 650
 651         if(cfg->verbosity < 0)
 652                 fatal_exit("verbosity value < 0");
 653         if(cfg->num_threads <= 0 || cfg->num_threads > 10000)
 654                 fatal_exit("num_threads value weird");
 655         if(!cfg->do_ip4 && !cfg->do_ip6)
 656                 fatal_exit("ip4 and ip6 are both disabled, pointless");
 657         if(!cfg->do_ip4 && cfg->prefer_ip4)
 658                 fatal_exit("cannot prefer and disable ip4, pointless");
 659         if(!cfg->do_ip6 && cfg->prefer_ip6)
 660                 fatal_exit("cannot prefer and disable ip6, pointless");
 661         if(!cfg->do_udp && !cfg->do_tcp)
 662                 fatal_exit("udp and tcp are both disabled, pointless");
 663         if(cfg->edns_buffer_size > cfg->msg_buffer_size)
 664                 fatal_exit("edns-buffer-size larger than msg-buffer-size, "
 665                         "answers will not fit in processing buffer");
 666 #ifdef UB_ON_WINDOWS
 667         w_config_adjust_directory(cfg);
 668 #endif
 669         if(cfg->chrootdir && cfg->chrootdir[0] &&
 670                 cfg->chrootdir[strlen(cfg->chrootdir)-1] == '/')
 671                 fatal_exit("chootdir %s has trailing slash '/' please remove.",
 672                         cfg->chrootdir);
 673         if(cfg->chrootdir && cfg->chrootdir[0] &&
 674                 !is_dir(cfg->chrootdir)) {
 675                 fatal_exit("bad chroot directory");
 676         }
 677         if(cfg->directory && cfg->directory[0]) {
 678                 char* ad = fname_after_chroot(cfg->directory, cfg, 0);
 679                 if(!ad) fatal_exit("out of memory");
 680                 if(!is_dir(ad)) fatal_exit("bad chdir directory");
 681                 free(ad);
 682         }
 683         if( (cfg->chrootdir && cfg->chrootdir[0]) ||
 684             (cfg->directory && cfg->directory[0])) {
 685                 if(cfg->pidfile && cfg->pidfile[0]) {
 686                         char* ad = (cfg->pidfile[0]=='/')?strdup(cfg->pidfile):
 687                                 fname_after_chroot(cfg->pidfile, cfg, 1);
 688                         char* bd = basedir(ad);
 689                         if(bd && !is_dir(bd))
 690                                 fatal_exit("pidfile directory does not exist");
 691                         free(ad);
 692                 }
 693                 if(cfg->logfile && cfg->logfile[0]) {
 694                         char* ad = fname_after_chroot(cfg->logfile, cfg, 1);
 695                         char* bd = basedir(ad);
 696                         if(bd && !is_dir(bd))
 697                                 fatal_exit("logfile directory does not exist");
 698                         free(ad);
 699                 }
 700         }
 701
 702         check_chroot_filelist("file with root-hints",
 703                 cfg->root_hints, cfg->chrootdir, cfg);
 704         check_chroot_filelist("trust-anchor-file",
 705                 cfg->trust_anchor_file_list, cfg->chrootdir, cfg);
 706         check_chroot_filelist("auto-trust-anchor-file",
 707                 cfg->auto_trust_anchor_file_list, cfg->chrootdir, cfg);
 708         check_chroot_filelist_wild("trusted-keys-file",
 709                 cfg->trusted_keys_file_list, cfg->chrootdir, cfg);
 710         if(cfg->disable_edns_do && strstr(cfg->module_conf, "validator")
 711                 && (cfg->trust_anchor_file_list
 712                 || cfg->trust_anchor_list
 713                 || cfg->auto_trust_anchor_file_list
 714                 || cfg->trusted_keys_file_list)) {
 715                 char* key = NULL;
 716                 if(cfg->auto_trust_anchor_file_list)
 717                         key = cfg->auto_trust_anchor_file_list->str;
 718                 if(!key && cfg->trust_anchor_file_list)
 719                         key = cfg->trust_anchor_file_list->str;
 720                 if(!key && cfg->trust_anchor_list)
 721                         key = cfg->trust_anchor_list->str;
 722                 if(!key && cfg->trusted_keys_file_list)
 723                         key = cfg->trusted_keys_file_list->str;
 724                 if(!key) key = "";
 725                 fatal_exit("disable-edns-do does not allow DNSSEC to work, but the validator module uses a trust anchor %s, turn off disable-edns-do or disable validation", key);
 726         }
 727 #ifdef USE_IPSECMOD
 728         if(cfg->ipsecmod_enabled && strstr(cfg->module_conf, "ipsecmod")) {
 729                 /* only check hook if enabled */
 730                 check_chroot_string("ipsecmod-hook", &cfg->ipsecmod_hook,
 731                         cfg->chrootdir, cfg);
 732         }
 733 #endif
 734         /* remove chroot setting so that modules are not stripping pathnames */
 735         free(cfg->chrootdir);
 736         cfg->chrootdir = NULL;
 737
 738         /* check that the modules listed in module_conf exist */
 739         check_modules_exist(cfg->module_conf);
 740
 741         /* Respip is known to *not* work with dns64. */
 742         if(strcmp(cfg->module_conf, "iterator") != 0
 743                 && strcmp(cfg->module_conf, "validator iterator") != 0
 744                 && strcmp(cfg->module_conf, "dns64 validator iterator") != 0
 745                 && strcmp(cfg->module_conf, "dns64 iterator") != 0
 746                 && strcmp(cfg->module_conf, "respip iterator") != 0
 747                 && strcmp(cfg->module_conf, "respip validator iterator") != 0
 748                 && strcmp(cfg->module_conf, "respip dns64 validator iterator") != 0
 749                 && strcmp(cfg->module_conf, "respip dns64 iterator") != 0
 750 #ifdef WITH_PYTHONMODULE
 751                 && strcmp(cfg->module_conf, "python iterator") != 0
 752                 && strcmp(cfg->module_conf, "python respip iterator") != 0
 753                 && strcmp(cfg->module_conf, "python validator iterator") != 0
 754                 && strcmp(cfg->module_conf, "python respip validator iterator") != 0
 755                 && strcmp(cfg->module_conf, "validator python iterator") != 0
 756                 && strcmp(cfg->module_conf, "dns64 python iterator") != 0
 757                 && strcmp(cfg->module_conf, "dns64 python validator iterator") != 0
 758                 && strcmp(cfg->module_conf, "dns64 validator python iterator") != 0
 759                 && strcmp(cfg->module_conf, "python dns64 iterator") != 0
 760                 && strcmp(cfg->module_conf, "python dns64 validator iterator") != 0
 761 #endif
 762 #ifdef WITH_DYNLIBMODULE
 763                 && strcmp(cfg->module_conf, "dynlib iterator") != 0
 764                 && strcmp(cfg->module_conf, "dynlib dynlib iterator") != 0
 765                 && strcmp(cfg->module_conf, "dynlib dynlib dynlib iterator") != 0
 766                 && strcmp(cfg->module_conf, "python dynlib iterator") != 0
 767                 && strcmp(cfg->module_conf, "python dynlib dynlib iterator") != 0
 768                 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib iterator") != 0
 769                 && strcmp(cfg->module_conf, "dynlib respip iterator") != 0
 770                 && strcmp(cfg->module_conf, "dynlib validator iterator") != 0
 771                 && strcmp(cfg->module_conf, "dynlib dynlib validator iterator") != 0
 772                 && strcmp(cfg->module_conf, "dynlib dynlib dynlib validator iterator") != 0
 773                 && strcmp(cfg->module_conf, "python dynlib validator iterator") != 0
 774                 && strcmp(cfg->module_conf, "python dynlib dynlib validator iterator") != 0
 775                 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib validator iterator") != 0
 776                 && strcmp(cfg->module_conf, "dynlib respip validator iterator") != 0
 777                 && strcmp(cfg->module_conf, "validator dynlib iterator") != 0
 778                 && strcmp(cfg->module_conf, "dns64 dynlib iterator") != 0
 779                 && strcmp(cfg->module_conf, "dns64 dynlib validator iterator") != 0
 780                 && strcmp(cfg->module_conf, "dns64 validator dynlib iterator") != 0
 781                 && strcmp(cfg->module_conf, "dynlib dns64 iterator") != 0
 782                 && strcmp(cfg->module_conf, "dynlib dns64 validator iterator") != 0
 783                 && strcmp(cfg->module_conf, "dynlib dns64 cachedb iterator") != 0
 784                 && strcmp(cfg->module_conf, "dynlib dns64 validator cachedb iterator") != 0
 785                 && strcmp(cfg->module_conf, "dns64 dynlib cachedb iterator") != 0
 786                 && strcmp(cfg->module_conf, "dns64 dynlib validator cachedb iterator") != 0
 787                 && strcmp(cfg->module_conf, "dynlib cachedb iterator") != 0
 788                 && strcmp(cfg->module_conf, "dynlib respip cachedb iterator") != 0
 789                 && strcmp(cfg->module_conf, "dynlib validator cachedb iterator") != 0
 790                 && strcmp(cfg->module_conf, "dynlib respip validator cachedb iterator") != 0
 791                 && strcmp(cfg->module_conf, "cachedb dynlib iterator") != 0
 792                 && strcmp(cfg->module_conf, "respip cachedb dynlib iterator") != 0
 793                 && strcmp(cfg->module_conf, "validator cachedb dynlib iterator") != 0
 794                 && strcmp(cfg->module_conf, "respip validator cachedb dynlib iterator") != 0
 795                 && strcmp(cfg->module_conf, "validator dynlib cachedb iterator") != 0
 796                 && strcmp(cfg->module_conf, "respip validator dynlib cachedb iterator") != 0
 797                 && strcmp(cfg->module_conf, "dynlib subnetcache iterator") != 0
 798                 && strcmp(cfg->module_conf, "dynlib respip subnetcache iterator") != 0
 799                 && strcmp(cfg->module_conf, "subnetcache dynlib iterator") != 0
 800                 && strcmp(cfg->module_conf, "respip subnetcache dynlib iterator") != 0
 801                 && strcmp(cfg->module_conf, "dynlib subnetcache validator iterator") != 0
 802                 && strcmp(cfg->module_conf, "dynlib respip subnetcache validator iterator") != 0
 803                 && strcmp(cfg->module_conf, "subnetcache dynlib validator iterator") != 0
 804                 && strcmp(cfg->module_conf, "respip subnetcache dynlib validator iterator") != 0
 805                 && strcmp(cfg->module_conf, "subnetcache validator dynlib iterator") != 0
 806                 && strcmp(cfg->module_conf, "respip subnetcache validator dynlib iterator") != 0
 807                 && strcmp(cfg->module_conf, "dynlib ipsecmod iterator") != 0
 808                 && strcmp(cfg->module_conf, "dynlib ipsecmod respip iterator") != 0
 809                 && strcmp(cfg->module_conf, "ipsecmod dynlib iterator") != 0
 810                 && strcmp(cfg->module_conf, "ipsecmod dynlib respip iterator") != 0
 811                 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0
 812                 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0
 813                 && strcmp(cfg->module_conf, "dynlib ipsecmod validator iterator") != 0
 814                 && strcmp(cfg->module_conf, "dynlib ipsecmod respip validator iterator") != 0
 815                 && strcmp(cfg->module_conf, "ipsecmod dynlib validator iterator") != 0
 816                 && strcmp(cfg->module_conf, "ipsecmod dynlib respip validator iterator") != 0
 817                 && strcmp(cfg->module_conf, "ipsecmod validator dynlib iterator") != 0
 818                 && strcmp(cfg->module_conf, "ipsecmod respip validator dynlib iterator") != 0
 819 #endif
 820 #ifdef USE_CACHEDB
 821                 && strcmp(cfg->module_conf, "validator cachedb iterator") != 0
 822                 && strcmp(cfg->module_conf, "respip validator cachedb iterator") != 0
 823                 && strcmp(cfg->module_conf, "cachedb iterator") != 0
 824                 && strcmp(cfg->module_conf, "respip cachedb iterator") != 0
 825                 && strcmp(cfg->module_conf, "dns64 validator cachedb iterator") != 0
 826                 && strcmp(cfg->module_conf, "dns64 cachedb iterator") != 0
 827 #endif
 828 #if defined(WITH_PYTHONMODULE) && defined(USE_CACHEDB)
 829                 && strcmp(cfg->module_conf, "python dns64 cachedb iterator") != 0
 830                 && strcmp(cfg->module_conf, "python dns64 validator cachedb iterator") != 0
 831                 && strcmp(cfg->module_conf, "dns64 python cachedb iterator") != 0
 832                 && strcmp(cfg->module_conf, "dns64 python validator cachedb iterator") != 0
 833                 && strcmp(cfg->module_conf, "python cachedb iterator") != 0
 834                 && strcmp(cfg->module_conf, "python respip cachedb iterator") != 0
 835                 && strcmp(cfg->module_conf, "python validator cachedb iterator") != 0
 836                 && strcmp(cfg->module_conf, "python respip validator cachedb iterator") != 0
 837                 && strcmp(cfg->module_conf, "cachedb python iterator") != 0
 838                 && strcmp(cfg->module_conf, "respip cachedb python iterator") != 0
 839                 && strcmp(cfg->module_conf, "validator cachedb python iterator") != 0
 840                 && strcmp(cfg->module_conf, "respip validator cachedb python iterator") != 0
 841                 && strcmp(cfg->module_conf, "validator python cachedb iterator") != 0
 842                 && strcmp(cfg->module_conf, "respip validator python cachedb iterator") != 0
 843 #endif
 844 #if defined(CLIENT_SUBNET) && defined(USE_CACHEDB)
 845                 && strcmp(cfg->module_conf, "respip subnetcache validator cachedb iterator") != 0
 846                 && strcmp(cfg->module_conf, "subnetcache validator cachedb iterator") != 0
 847 #endif
 848 #ifdef CLIENT_SUBNET
 849                 && strcmp(cfg->module_conf, "subnetcache iterator") != 0
 850                 && strcmp(cfg->module_conf, "respip subnetcache iterator") != 0
 851                 && strcmp(cfg->module_conf, "subnetcache validator iterator") != 0
 852                 && strcmp(cfg->module_conf, "respip subnetcache validator iterator") != 0
 853                 && strcmp(cfg->module_conf, "dns64 subnetcache iterator") != 0
 854                 && strcmp(cfg->module_conf, "dns64 subnetcache validator iterator") != 0
 855                 && strcmp(cfg->module_conf, "dns64 subnetcache respip iterator") != 0
 856                 && strcmp(cfg->module_conf, "dns64 subnetcache respip validator iterator") != 0
 857 #endif
 858 #if defined(WITH_PYTHONMODULE) && defined(CLIENT_SUBNET)
 859                 && strcmp(cfg->module_conf, "python subnetcache iterator") != 0
 860                 && strcmp(cfg->module_conf, "python respip subnetcache iterator") != 0
 861                 && strcmp(cfg->module_conf, "subnetcache python iterator") != 0
 862                 && strcmp(cfg->module_conf, "respip subnetcache python iterator") != 0
 863                 && strcmp(cfg->module_conf, "python subnetcache validator iterator") != 0
 864                 && strcmp(cfg->module_conf, "python respip subnetcache validator iterator") != 0
 865                 && strcmp(cfg->module_conf, "subnetcache python validator iterator") != 0
 866                 && strcmp(cfg->module_conf, "respip subnetcache python validator iterator") != 0
 867                 && strcmp(cfg->module_conf, "subnetcache validator python iterator") != 0
 868                 && strcmp(cfg->module_conf, "respip subnetcache validator python iterator") != 0
 869 #endif
 870 #ifdef USE_IPSECMOD
 871                 && strcmp(cfg->module_conf, "ipsecmod iterator") != 0
 872                 && strcmp(cfg->module_conf, "ipsecmod respip iterator") != 0
 873                 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0
 874                 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0
 875 #endif
 876 #if defined(WITH_PYTHONMODULE) && defined(USE_IPSECMOD)
 877                 && strcmp(cfg->module_conf, "python ipsecmod iterator") != 0
 878                 && strcmp(cfg->module_conf, "python ipsecmod respip iterator") != 0
 879                 && strcmp(cfg->module_conf, "ipsecmod python iterator") != 0
 880                 && strcmp(cfg->module_conf, "ipsecmod python respip iterator") != 0
 881                 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0
 882                 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0
 883                 && strcmp(cfg->module_conf, "python ipsecmod validator iterator") != 0
 884                 && strcmp(cfg->module_conf, "python ipsecmod respip validator iterator") != 0
 885                 && strcmp(cfg->module_conf, "ipsecmod python validator iterator") != 0
 886                 && strcmp(cfg->module_conf, "ipsecmod python respip validator iterator") != 0
 887                 && strcmp(cfg->module_conf, "ipsecmod validator python iterator") != 0
 888                 && strcmp(cfg->module_conf, "ipsecmod respip validator python iterator") != 0
 889 #endif
 890 #ifdef USE_IPSET
 891                 && strcmp(cfg->module_conf, "validator ipset iterator") != 0
 892                 && strcmp(cfg->module_conf, "validator ipset respip iterator") != 0
 893                 && strcmp(cfg->module_conf, "ipset iterator") != 0
 894                 && strcmp(cfg->module_conf, "ipset respip iterator") != 0
 895 #endif
 896                 ) {
 897                 fatal_exit("module conf '%s' is not known to work",
 898                         cfg->module_conf);
 899         }
 900
 901 #ifdef HAVE_GETPWNAM
 902         if(cfg->username && cfg->username[0]) {
 903                 if(getpwnam(cfg->username) == NULL)
 904                         fatal_exit("user '%s' does not exist.", cfg->username);
 905 #  ifdef HAVE_ENDPWENT
 906                 endpwent();
 907 #  endif
 908         }
 909 #endif
 910         if(cfg->remote_control_enable && options_remote_is_address(cfg)
 911                 && cfg->control_use_cert) {
 912                 check_chroot_string("server-key-file", &cfg->server_key_file,
 913                         cfg->chrootdir, cfg);
 914                 check_chroot_string("server-cert-file", &cfg->server_cert_file,
 915                         cfg->chrootdir, cfg);
 916                 if(!is_file(cfg->control_key_file))
 917                         fatal_exit("control-key-file: \"%s\" does not exist",
 918                                 cfg->control_key_file);
 919                 if(!is_file(cfg->control_cert_file))
 920                         fatal_exit("control-cert-file: \"%s\" does not exist",
 921                                 cfg->control_cert_file);
 922         }
 923
 924         donotquerylocalhostcheck(cfg);
 925         localzonechecks(cfg);
 926         view_and_respipchecks(cfg);
 927 #ifdef CLIENT_SUBNET
 928         ecs_conf_checks(cfg);
 929 #endif
 930 }
 931
 932 /** check forwards */
 933 static void
 934 check_fwd(struct config_file* cfg)
 935 {
 936         struct iter_forwards* fwd = forwards_create();
 937         if(!fwd || !forwards_apply_cfg(fwd, cfg)) {
 938                 fatal_exit("Could not set forward zones");
 939         }
 940         forwards_delete(fwd);
 941 }
 942
 943 /** check hints */
 944 static void
 945 check_hints(struct config_file* cfg)
 946 {
 947         struct iter_hints* hints = hints_create();
 948         if(!hints || !hints_apply_cfg(hints, cfg)) {
 949                 fatal_exit("Could not set root or stub hints");
 950         }
 951         hints_delete(hints);
 952 }
 953
 954 /** check auth zones */
 955 static void
 956 check_auth(struct config_file* cfg)
 957 {
 958         int is_rpz = 0;
 959         struct auth_zones* az = auth_zones_create();
 960         if(!az || !auth_zones_apply_cfg(az, cfg, 0, &is_rpz, NULL, NULL)) {
 961                 fatal_exit("Could not setup authority zones");
 962         }
 963         auth_zones_delete(az);
 964 }
 965
 966 /** check config file */
 967 static void
 968 checkconf(const char* cfgfile, const char* opt, int final)
 969 {
 970         char oldwd[4096];
 971         struct config_file* cfg = config_create();
 972         if(!cfg)
 973                 fatal_exit("out of memory");
 974         oldwd[0] = 0;
 975         if(!getcwd(oldwd, sizeof(oldwd))) {
 976                 log_err("cannot getcwd: %s", strerror(errno));
 977                 oldwd[0] = 0;
 978         }
 979         if(!config_read(cfg, cfgfile, NULL)) {
 980                 /* config_read prints messages to stderr */
 981                 config_delete(cfg);
 982                 exit(1);
 983         }
 984         if(oldwd[0] && chdir(oldwd) == -1)
 985                 log_err("cannot chdir(%s): %s", oldwd, strerror(errno));
 986         if(opt) {
 987                 print_option(cfg, opt, final);
 988                 config_delete(cfg);
 989                 return;
 990         }
 991         morechecks(cfg);
 992         check_mod(cfg, iter_get_funcblock());
 993         check_mod(cfg, val_get_funcblock());
 994 #ifdef WITH_PYTHONMODULE
 995         if(strstr(cfg->module_conf, "python"))
 996                 check_mod(cfg, pythonmod_get_funcblock());
 997 #endif
 998         check_fwd(cfg);
 999         check_hints(cfg);
1000         check_auth(cfg);
1001         printf("unbound-checkconf: no errors in %s\n", cfgfile);
1002         config_delete(cfg);
1003 }
1004
1005 /** getopt global, in case header files fail to declare it. */
1006 extern int optind;
1007 /** getopt global, in case header files fail to declare it. */
1008 extern char* optarg;
1009
1010 /** Main routine for checkconf */
1011 int main(int argc, char* argv[])
1012 {
1013         int c;
1014         int final = 0;
1015         const char* f;
1016         const char* opt = NULL;
1017         const char* cfgfile = CONFIGFILE;
1018         checklock_start();
1019         log_ident_set("unbound-checkconf");
1020         log_init(NULL, 0, NULL);
1021 #ifdef USE_WINSOCK
1022         /* use registry config file in preference to compiletime location */
1023         if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile")))
1024                 cfgfile = CONFIGFILE;
1025 #endif /* USE_WINSOCK */
1026         /* parse the options */
1027         while( (c=getopt(argc, argv, "fho:")) != -1) {
1028                 switch(c) {
1029                 case 'f':
1030                         final = 1;
1031                         break;
1032                 case 'o':
1033                         opt = optarg;
1034                         break;
1035                 case '?':
1036                 case 'h':
1037                 default:
1038                         usage();
1039                 }
1040         }
1041         argc -= optind;
1042         argv += optind;
1043         if(argc != 0 && argc != 1)
1044                 usage();
1045         if(argc == 1)
1046                 f = argv[0];
1047         else    f = cfgfile;
1048         checkconf(f, opt, final);
1049         checklock_stop();
1050         return 0;
1051 }