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/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 #ifdef USE_IPSECMOD 628 if(cfg->ipsecmod_enabled && strstr(cfg->module_conf, "ipsecmod")) { 629 /* only check hook if enabled */ 630 check_chroot_string("ipsecmod-hook", &cfg->ipsecmod_hook, 631 cfg->chrootdir, cfg); 632 } 633 #endif 634 /* remove chroot setting so that modules are not stripping pathnames*/ 635 free(cfg->chrootdir); 636 cfg->chrootdir = NULL; 637 638 /* check that the modules listed in module_conf exist */ 639 check_modules_exist(cfg->module_conf); 640 641 /* Respip is known to *not* work with dns64. */ 642 if(strcmp(cfg->module_conf, "iterator") != 0 643 && strcmp(cfg->module_conf, "validator iterator") != 0 644 && strcmp(cfg->module_conf, "dns64 validator iterator") != 0 645 && strcmp(cfg->module_conf, "dns64 iterator") != 0 646 && strcmp(cfg->module_conf, "respip iterator") != 0 647 && strcmp(cfg->module_conf, "respip validator iterator") != 0 648 #ifdef WITH_PYTHONMODULE 649 && strcmp(cfg->module_conf, "python iterator") != 0 650 && strcmp(cfg->module_conf, "python respip iterator") != 0 651 && strcmp(cfg->module_conf, "python validator iterator") != 0 652 && strcmp(cfg->module_conf, "python respip validator iterator") != 0 653 && strcmp(cfg->module_conf, "validator python iterator") != 0 654 && strcmp(cfg->module_conf, "dns64 python iterator") != 0 655 && strcmp(cfg->module_conf, "dns64 python validator iterator") != 0 656 && strcmp(cfg->module_conf, "dns64 validator python iterator") != 0 657 && strcmp(cfg->module_conf, "python dns64 iterator") != 0 658 && strcmp(cfg->module_conf, "python dns64 validator iterator") != 0 659 #endif 660 #ifdef WITH_DYNLIBMODULE 661 && strcmp(cfg->module_conf, "dynlib iterator") != 0 662 && strcmp(cfg->module_conf, "dynlib dynlib iterator") != 0 663 && strcmp(cfg->module_conf, "dynlib dynlib dynlib iterator") != 0 664 && strcmp(cfg->module_conf, "python dynlib iterator") != 0 665 && strcmp(cfg->module_conf, "python dynlib dynlib iterator") != 0 666 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib iterator") != 0 667 && strcmp(cfg->module_conf, "dynlib respip iterator") != 0 668 && strcmp(cfg->module_conf, "dynlib validator iterator") != 0 669 && strcmp(cfg->module_conf, "dynlib dynlib validator iterator") != 0 670 && strcmp(cfg->module_conf, "dynlib dynlib dynlib validator iterator") != 0 671 && strcmp(cfg->module_conf, "python dynlib validator iterator") != 0 672 && strcmp(cfg->module_conf, "python dynlib dynlib validator iterator") != 0 673 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib validator iterator") != 0 674 && strcmp(cfg->module_conf, "dynlib respip validator iterator") != 0 675 && strcmp(cfg->module_conf, "validator dynlib iterator") != 0 676 && strcmp(cfg->module_conf, "dns64 dynlib iterator") != 0 677 && strcmp(cfg->module_conf, "dns64 dynlib validator iterator") != 0 678 && strcmp(cfg->module_conf, "dns64 validator dynlib iterator") != 0 679 && strcmp(cfg->module_conf, "dynlib dns64 iterator") != 0 680 && strcmp(cfg->module_conf, "dynlib dns64 validator iterator") != 0 681 && strcmp(cfg->module_conf, "dynlib dns64 cachedb iterator") != 0 682 && strcmp(cfg->module_conf, "dynlib dns64 validator cachedb iterator") != 0 683 && strcmp(cfg->module_conf, "dns64 dynlib cachedb iterator") != 0 684 && strcmp(cfg->module_conf, "dns64 dynlib validator cachedb iterator") != 0 685 && strcmp(cfg->module_conf, "dynlib cachedb iterator") != 0 686 && strcmp(cfg->module_conf, "dynlib respip cachedb iterator") != 0 687 && strcmp(cfg->module_conf, "dynlib validator cachedb iterator") != 0 688 && strcmp(cfg->module_conf, "dynlib respip validator cachedb iterator") != 0 689 && strcmp(cfg->module_conf, "cachedb dynlib iterator") != 0 690 && strcmp(cfg->module_conf, "respip cachedb dynlib iterator") != 0 691 && strcmp(cfg->module_conf, "validator cachedb dynlib iterator") != 0 692 && strcmp(cfg->module_conf, "respip validator cachedb dynlib iterator") != 0 693 && strcmp(cfg->module_conf, "validator dynlib cachedb iterator") != 0 694 && strcmp(cfg->module_conf, "respip validator dynlib cachedb iterator") != 0 695 && strcmp(cfg->module_conf, "dynlib subnetcache iterator") != 0 696 && strcmp(cfg->module_conf, "dynlib respip subnetcache iterator") != 0 697 && strcmp(cfg->module_conf, "subnetcache dynlib iterator") != 0 698 && strcmp(cfg->module_conf, "respip subnetcache dynlib iterator") != 0 699 && strcmp(cfg->module_conf, "dynlib subnetcache validator iterator") != 0 700 && strcmp(cfg->module_conf, "dynlib respip subnetcache validator iterator") != 0 701 && strcmp(cfg->module_conf, "subnetcache dynlib validator iterator") != 0 702 && strcmp(cfg->module_conf, "respip subnetcache dynlib validator iterator") != 0 703 && strcmp(cfg->module_conf, "subnetcache validator dynlib iterator") != 0 704 && strcmp(cfg->module_conf, "respip subnetcache validator dynlib iterator") != 0 705 && strcmp(cfg->module_conf, "dynlib ipsecmod iterator") != 0 706 && strcmp(cfg->module_conf, "dynlib ipsecmod respip iterator") != 0 707 && strcmp(cfg->module_conf, "ipsecmod dynlib iterator") != 0 708 && strcmp(cfg->module_conf, "ipsecmod dynlib respip iterator") != 0 709 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 710 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 711 && strcmp(cfg->module_conf, "dynlib ipsecmod validator iterator") != 0 712 && strcmp(cfg->module_conf, "dynlib ipsecmod respip validator iterator") != 0 713 && strcmp(cfg->module_conf, "ipsecmod dynlib validator iterator") != 0 714 && strcmp(cfg->module_conf, "ipsecmod dynlib respip validator iterator") != 0 715 && strcmp(cfg->module_conf, "ipsecmod validator dynlib iterator") != 0 716 && strcmp(cfg->module_conf, "ipsecmod respip validator dynlib iterator") != 0 717 #endif 718 #ifdef USE_CACHEDB 719 && strcmp(cfg->module_conf, "validator cachedb iterator") != 0 720 && strcmp(cfg->module_conf, "respip validator cachedb iterator") != 0 721 && strcmp(cfg->module_conf, "cachedb iterator") != 0 722 && strcmp(cfg->module_conf, "respip cachedb iterator") != 0 723 && strcmp(cfg->module_conf, "dns64 validator cachedb iterator") != 0 724 && strcmp(cfg->module_conf, "dns64 cachedb iterator") != 0 725 #endif 726 #if defined(WITH_PYTHONMODULE) && defined(USE_CACHEDB) 727 && strcmp(cfg->module_conf, "python dns64 cachedb iterator") != 0 728 && strcmp(cfg->module_conf, "python dns64 validator cachedb iterator") != 0 729 && strcmp(cfg->module_conf, "dns64 python cachedb iterator") != 0 730 && strcmp(cfg->module_conf, "dns64 python validator cachedb iterator") != 0 731 && strcmp(cfg->module_conf, "python cachedb iterator") != 0 732 && strcmp(cfg->module_conf, "python respip cachedb iterator") != 0 733 && strcmp(cfg->module_conf, "python validator cachedb iterator") != 0 734 && strcmp(cfg->module_conf, "python respip validator cachedb iterator") != 0 735 && strcmp(cfg->module_conf, "cachedb python iterator") != 0 736 && strcmp(cfg->module_conf, "respip cachedb python iterator") != 0 737 && strcmp(cfg->module_conf, "validator cachedb python iterator") != 0 738 && strcmp(cfg->module_conf, "respip validator cachedb python iterator") != 0 739 && strcmp(cfg->module_conf, "validator python cachedb iterator") != 0 740 && strcmp(cfg->module_conf, "respip validator python cachedb iterator") != 0 741 #endif 742 #ifdef CLIENT_SUBNET 743 && strcmp(cfg->module_conf, "subnetcache iterator") != 0 744 && strcmp(cfg->module_conf, "respip subnetcache iterator") != 0 745 && strcmp(cfg->module_conf, "subnetcache validator iterator") != 0 746 && strcmp(cfg->module_conf, "respip subnetcache validator iterator") != 0 747 && strcmp(cfg->module_conf, "dns64 subnetcache iterator") != 0 748 && strcmp(cfg->module_conf, "dns64 subnetcache validator iterator") != 0 749 && strcmp(cfg->module_conf, "dns64 subnetcache respip iterator") != 0 750 && strcmp(cfg->module_conf, "dns64 subnetcache respip validator iterator") != 0 751 #endif 752 #if defined(WITH_PYTHONMODULE) && defined(CLIENT_SUBNET) 753 && strcmp(cfg->module_conf, "python subnetcache iterator") != 0 754 && strcmp(cfg->module_conf, "python respip subnetcache iterator") != 0 755 && strcmp(cfg->module_conf, "subnetcache python iterator") != 0 756 && strcmp(cfg->module_conf, "respip subnetcache python iterator") != 0 757 && strcmp(cfg->module_conf, "python subnetcache validator iterator") != 0 758 && strcmp(cfg->module_conf, "python respip subnetcache validator iterator") != 0 759 && strcmp(cfg->module_conf, "subnetcache python validator iterator") != 0 760 && strcmp(cfg->module_conf, "respip subnetcache python validator iterator") != 0 761 && strcmp(cfg->module_conf, "subnetcache validator python iterator") != 0 762 && strcmp(cfg->module_conf, "respip subnetcache validator python iterator") != 0 763 #endif 764 #ifdef USE_IPSECMOD 765 && strcmp(cfg->module_conf, "ipsecmod iterator") != 0 766 && strcmp(cfg->module_conf, "ipsecmod respip iterator") != 0 767 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 768 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 769 #endif 770 #if defined(WITH_PYTHONMODULE) && defined(USE_IPSECMOD) 771 && strcmp(cfg->module_conf, "python ipsecmod iterator") != 0 772 && strcmp(cfg->module_conf, "python ipsecmod respip iterator") != 0 773 && strcmp(cfg->module_conf, "ipsecmod python iterator") != 0 774 && strcmp(cfg->module_conf, "ipsecmod python respip iterator") != 0 775 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 776 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 777 && strcmp(cfg->module_conf, "python ipsecmod validator iterator") != 0 778 && strcmp(cfg->module_conf, "python ipsecmod respip validator iterator") != 0 779 && strcmp(cfg->module_conf, "ipsecmod python validator iterator") != 0 780 && strcmp(cfg->module_conf, "ipsecmod python respip validator iterator") != 0 781 && strcmp(cfg->module_conf, "ipsecmod validator python iterator") != 0 782 && strcmp(cfg->module_conf, "ipsecmod respip validator python iterator") != 0 783 #endif 784 #ifdef USE_IPSET 785 && strcmp(cfg->module_conf, "validator ipset iterator") != 0 786 && strcmp(cfg->module_conf, "validator ipset respip iterator") != 0 787 && strcmp(cfg->module_conf, "ipset iterator") != 0 788 && strcmp(cfg->module_conf, "ipset respip iterator") != 0 789 #endif 790 ) { 791 fatal_exit("module conf '%s' is not known to work", 792 cfg->module_conf); 793 } 794 795 #ifdef HAVE_GETPWNAM 796 if(cfg->username && cfg->username[0]) { 797 if(getpwnam(cfg->username) == NULL) 798 fatal_exit("user '%s' does not exist.", cfg->username); 799 # ifdef HAVE_ENDPWENT 800 endpwent(); 801 # endif 802 } 803 #endif 804 if(cfg->remote_control_enable && options_remote_is_address(cfg) 805 && cfg->control_use_cert) { 806 check_chroot_string("server-key-file", &cfg->server_key_file, 807 cfg->chrootdir, cfg); 808 check_chroot_string("server-cert-file", &cfg->server_cert_file, 809 cfg->chrootdir, cfg); 810 if(!is_file(cfg->control_key_file)) 811 fatal_exit("control-key-file: \"%s\" does not exist", 812 cfg->control_key_file); 813 if(!is_file(cfg->control_cert_file)) 814 fatal_exit("control-cert-file: \"%s\" does not exist", 815 cfg->control_cert_file); 816 } 817 818 donotquerylocalhostcheck(cfg); 819 localzonechecks(cfg); 820 view_and_respipchecks(cfg); 821 #ifdef CLIENT_SUBNET 822 ecs_conf_checks(cfg); 823 #endif 824 } 825 826 /** check forwards */ 827 static void 828 check_fwd(struct config_file* cfg) 829 { 830 struct iter_forwards* fwd = forwards_create(); 831 if(!fwd || !forwards_apply_cfg(fwd, cfg)) { 832 fatal_exit("Could not set forward zones"); 833 } 834 forwards_delete(fwd); 835 } 836 837 /** check hints */ 838 static void 839 check_hints(struct config_file* cfg) 840 { 841 struct iter_hints* hints = hints_create(); 842 if(!hints || !hints_apply_cfg(hints, cfg)) { 843 fatal_exit("Could not set root or stub hints"); 844 } 845 hints_delete(hints); 846 } 847 848 /** check auth zones */ 849 static void 850 check_auth(struct config_file* cfg) 851 { 852 int is_rpz = 0; 853 struct auth_zones* az = auth_zones_create(); 854 if(!az || !auth_zones_apply_cfg(az, cfg, 0, &is_rpz, NULL, NULL)) { 855 fatal_exit("Could not setup authority zones"); 856 } 857 auth_zones_delete(az); 858 } 859 860 /** check config file */ 861 static void 862 checkconf(const char* cfgfile, const char* opt, int final) 863 { 864 char oldwd[4096]; 865 struct config_file* cfg = config_create(); 866 if(!cfg) 867 fatal_exit("out of memory"); 868 oldwd[0] = 0; 869 if(!getcwd(oldwd, sizeof(oldwd))) { 870 log_err("cannot getcwd: %s", strerror(errno)); 871 oldwd[0] = 0; 872 } 873 if(!config_read(cfg, cfgfile, NULL)) { 874 /* config_read prints messages to stderr */ 875 config_delete(cfg); 876 exit(1); 877 } 878 if(oldwd[0] && chdir(oldwd) == -1) 879 log_err("cannot chdir(%s): %s", oldwd, strerror(errno)); 880 if(opt) { 881 print_option(cfg, opt, final); 882 config_delete(cfg); 883 return; 884 } 885 morechecks(cfg); 886 check_mod(cfg, iter_get_funcblock()); 887 check_mod(cfg, val_get_funcblock()); 888 #ifdef WITH_PYTHONMODULE 889 if(strstr(cfg->module_conf, "python")) 890 check_mod(cfg, pythonmod_get_funcblock()); 891 #endif 892 check_fwd(cfg); 893 check_hints(cfg); 894 check_auth(cfg); 895 printf("unbound-checkconf: no errors in %s\n", cfgfile); 896 config_delete(cfg); 897 } 898 899 /** getopt global, in case header files fail to declare it. */ 900 extern int optind; 901 /** getopt global, in case header files fail to declare it. */ 902 extern char* optarg; 903 904 /** Main routine for checkconf */ 905 int main(int argc, char* argv[]) 906 { 907 int c; 908 int final = 0; 909 const char* f; 910 const char* opt = NULL; 911 const char* cfgfile = CONFIGFILE; 912 log_ident_set("unbound-checkconf"); 913 log_init(NULL, 0, NULL); 914 checklock_start(); 915 #ifdef USE_WINSOCK 916 /* use registry config file in preference to compiletime location */ 917 if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile"))) 918 cfgfile = CONFIGFILE; 919 #endif /* USE_WINSOCK */ 920 /* parse the options */ 921 while( (c=getopt(argc, argv, "fho:")) != -1) { 922 switch(c) { 923 case 'f': 924 final = 1; 925 break; 926 case 'o': 927 opt = optarg; 928 break; 929 case '?': 930 case 'h': 931 default: 932 usage(); 933 } 934 } 935 argc -= optind; 936 argv += optind; 937 if(argc != 0 && argc != 1) 938 usage(); 939 if(argc == 1) 940 f = argv[0]; 941 else f = cfgfile; 942 checkconf(f, opt, final); 943 checklock_stop(); 944 return 0; 945 } 946