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)) { 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; 341 342 if(cfg->num_ifs != 0) { 343 resif = (char***)calloc(cfg->num_ifs, sizeof(char**)); 344 if(!resif) fatal_exit("malloc failure"); 345 num_resif = (int*)calloc(cfg->num_ifs, sizeof(int)); 346 if(!num_resif) fatal_exit("malloc failure"); 347 } 348 for(i=0; i<cfg->num_ifs; i++) { 349 /* search for duplicates in IP or ifname arguments */ 350 for(i2=0; i2<i; i2++) { 351 if(strcmp(cfg->ifs[i], cfg->ifs[i2]) == 0) { 352 fatal_exit("interface: %s present twice, " 353 "cannot bind same ports twice.", 354 cfg->ifs[i]); 355 } 356 } 357 if(!resolve_interface_names(&cfg->ifs[i], 1, NULL, &resif[i], 358 &num_resif[i])) { 359 fatal_exit("could not resolve interface names, for %s", 360 cfg->ifs[i]); 361 } 362 /* search for duplicates in the returned addresses */ 363 for(j=0; j<num_resif[i]; j++) { 364 if(!extstrtoaddr(resif[i][j], &a, &alen)) { 365 if(strcmp(cfg->ifs[i], resif[i][j]) != 0) 366 fatal_exit("cannot parse interface address '%s' from the interface specified as '%s'", 367 resif[i][j], cfg->ifs[i]); 368 else 369 fatal_exit("cannot parse interface specified as '%s'", 370 cfg->ifs[i]); 371 } 372 for(i2=0; i2<i; i2++) { 373 for(j2=0; j2<num_resif[i2]; j2++) { 374 if(strcmp(resif[i][j], resif[i2][j2]) 375 == 0) { 376 char info1[1024], info2[1024]; 377 if(strcmp(cfg->ifs[i], resif[i][j]) != 0) 378 snprintf(info1, sizeof(info1), "address %s from interface: %s", resif[i][j], cfg->ifs[i]); 379 else snprintf(info1, sizeof(info1), "interface: %s", cfg->ifs[i]); 380 if(strcmp(cfg->ifs[i2], resif[i2][j2]) != 0) 381 snprintf(info2, sizeof(info2), "address %s from interface: %s", resif[i2][j2], cfg->ifs[i2]); 382 else snprintf(info2, sizeof(info2), "interface: %s", cfg->ifs[i2]); 383 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); 384 } 385 } 386 } 387 } 388 } 389 390 for(i=0; i<cfg->num_ifs; i++) { 391 config_del_strarray(resif[i], num_resif[i]); 392 } 393 free(resif); 394 free(num_resif); 395 396 for(i=0; i<cfg->num_out_ifs; i++) { 397 if(!ipstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen) && 398 !netblockstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen, &d)) { 399 fatal_exit("cannot parse outgoing-interface " 400 "specified as '%s'", cfg->out_ifs[i]); 401 } 402 for(j=0; j<cfg->num_out_ifs; j++) { 403 if(i!=j && strcmp(cfg->out_ifs[i], cfg->out_ifs[j])==0) 404 fatal_exit("outgoing-interface: %s present " 405 "twice, cannot bind same ports twice.", 406 cfg->out_ifs[i]); 407 } 408 } 409 } 410 411 /** check acl ips */ 412 static void 413 aclchecks(struct config_file* cfg) 414 { 415 int d; 416 struct sockaddr_storage a; 417 socklen_t alen; 418 struct config_str2list* acl; 419 for(acl=cfg->acls; acl; acl = acl->next) { 420 if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen, 421 &d)) { 422 fatal_exit("cannot parse access control address %s %s", 423 acl->str, acl->str2); 424 } 425 } 426 } 427 428 /** check tcp connection limit ips */ 429 static void 430 tcpconnlimitchecks(struct config_file* cfg) 431 { 432 int d; 433 struct sockaddr_storage a; 434 socklen_t alen; 435 struct config_str2list* tcl; 436 for(tcl=cfg->tcp_connection_limits; tcl; tcl = tcl->next) { 437 if(!netblockstrtoaddr(tcl->str, UNBOUND_DNS_PORT, &a, &alen, 438 &d)) { 439 fatal_exit("cannot parse tcp connection limit address %s %s", 440 tcl->str, tcl->str2); 441 } 442 } 443 } 444 445 /** true if fname is a file */ 446 static int 447 is_file(const char* fname) 448 { 449 struct stat buf; 450 if(stat(fname, &buf) < 0) { 451 if(errno==EACCES) { 452 printf("warning: no search permission for one of the directories in path: %s\n", fname); 453 return 1; 454 } 455 perror(fname); 456 return 0; 457 } 458 if(S_ISDIR(buf.st_mode)) { 459 printf("%s is not a file\n", fname); 460 return 0; 461 } 462 return 1; 463 } 464 465 /** true if fname is a directory */ 466 static int 467 is_dir(const char* fname) 468 { 469 struct stat buf; 470 if(stat(fname, &buf) < 0) { 471 if(errno==EACCES) { 472 printf("warning: no search permission for one of the directories in path: %s\n", fname); 473 return 1; 474 } 475 perror(fname); 476 return 0; 477 } 478 if(!(S_ISDIR(buf.st_mode))) { 479 printf("%s is not a directory\n", fname); 480 return 0; 481 } 482 return 1; 483 } 484 485 /** get base dir of a fname */ 486 static char* 487 basedir(char* fname) 488 { 489 char* rev; 490 if(!fname) fatal_exit("out of memory"); 491 rev = strrchr(fname, '/'); 492 if(!rev) return NULL; 493 if(fname == rev) return NULL; 494 rev[0] = 0; 495 return fname; 496 } 497 498 /** check chroot for a file string */ 499 static void 500 check_chroot_string(const char* desc, char** ss, 501 const char* chrootdir, struct config_file* cfg) 502 { 503 char* str = *ss; 504 if(str && str[0]) { 505 *ss = fname_after_chroot(str, cfg, 1); 506 if(!*ss) fatal_exit("out of memory"); 507 if(!is_file(*ss)) { 508 if(chrootdir && chrootdir[0]) 509 fatal_exit("%s: \"%s\" does not exist in " 510 "chrootdir %s", desc, str, chrootdir); 511 else 512 fatal_exit("%s: \"%s\" does not exist", 513 desc, str); 514 } 515 /* put in a new full path for continued checking */ 516 free(str); 517 } 518 } 519 520 /** check file list, every file must be inside the chroot location */ 521 static void 522 check_chroot_filelist(const char* desc, struct config_strlist* list, 523 const char* chrootdir, struct config_file* cfg) 524 { 525 struct config_strlist* p; 526 for(p=list; p; p=p->next) { 527 check_chroot_string(desc, &p->str, chrootdir, cfg); 528 } 529 } 530 531 /** check file list, with wildcard processing */ 532 static void 533 check_chroot_filelist_wild(const char* desc, struct config_strlist* list, 534 const char* chrootdir, struct config_file* cfg) 535 { 536 struct config_strlist* p; 537 for(p=list; p; p=p->next) { 538 #ifdef HAVE_GLOB 539 if(strchr(p->str, '*') || strchr(p->str, '[') || 540 strchr(p->str, '?') || strchr(p->str, '{') || 541 strchr(p->str, '~')) { 542 char* s = p->str; 543 /* adjust whole pattern for chroot and check later */ 544 p->str = fname_after_chroot(p->str, cfg, 1); 545 free(s); 546 } else 547 #endif /* HAVE_GLOB */ 548 check_chroot_string(desc, &p->str, chrootdir, cfg); 549 } 550 } 551 552 #ifdef CLIENT_SUBNET 553 /** check ECS configuration */ 554 static void 555 ecs_conf_checks(struct config_file* cfg) 556 { 557 struct ecs_whitelist* whitelist = NULL; 558 if(!(whitelist = ecs_whitelist_create())) 559 fatal_exit("Could not create ednssubnet whitelist: out of memory"); 560 if(!ecs_whitelist_apply_cfg(whitelist, cfg)) 561 fatal_exit("Could not setup ednssubnet whitelist"); 562 ecs_whitelist_delete(whitelist); 563 } 564 #endif /* CLIENT_SUBNET */ 565 566 /** check that the modules exist, are compiled in */ 567 static void 568 check_modules_exist(const char* module_conf) 569 { 570 const char** names = module_list_avail(); 571 const char* s = module_conf; 572 while(*s) { 573 int i = 0; 574 int is_ok = 0; 575 while(*s && isspace((unsigned char)*s)) 576 s++; 577 if(!*s) break; 578 while(names[i]) { 579 if(strncmp(names[i], s, strlen(names[i])) == 0) { 580 is_ok = 1; 581 break; 582 } 583 i++; 584 } 585 if(is_ok == 0) { 586 char n[64]; 587 size_t j; 588 n[0]=0; 589 n[sizeof(n)-1]=0; 590 for(j=0; j<sizeof(n)-1; j++) { 591 if(!s[j] || isspace((unsigned char)s[j])) { 592 n[j] = 0; 593 break; 594 } 595 n[j] = s[j]; 596 } 597 fatal_exit("module_conf lists module '%s' but that " 598 "module is not available.", n); 599 } 600 s += strlen(names[i]); 601 } 602 } 603 604 /** check configuration for errors */ 605 static void 606 morechecks(struct config_file* cfg) 607 { 608 warn_hosts("stub-host", cfg->stubs); 609 warn_hosts("forward-host", cfg->forwards); 610 interfacechecks(cfg); 611 aclchecks(cfg); 612 tcpconnlimitchecks(cfg); 613 614 if(cfg->verbosity < 0) 615 fatal_exit("verbosity value < 0"); 616 if(cfg->num_threads <= 0 || cfg->num_threads > 10000) 617 fatal_exit("num_threads value weird"); 618 if(!cfg->do_ip4 && !cfg->do_ip6) 619 fatal_exit("ip4 and ip6 are both disabled, pointless"); 620 if(!cfg->do_ip4 && cfg->prefer_ip4) 621 fatal_exit("cannot prefer and disable ip4, pointless"); 622 if(!cfg->do_ip6 && cfg->prefer_ip6) 623 fatal_exit("cannot prefer and disable ip6, pointless"); 624 if(!cfg->do_udp && !cfg->do_tcp) 625 fatal_exit("udp and tcp are both disabled, pointless"); 626 if(cfg->edns_buffer_size > cfg->msg_buffer_size) 627 fatal_exit("edns-buffer-size larger than msg-buffer-size, " 628 "answers will not fit in processing buffer"); 629 #ifdef UB_ON_WINDOWS 630 w_config_adjust_directory(cfg); 631 #endif 632 if(cfg->chrootdir && cfg->chrootdir[0] && 633 cfg->chrootdir[strlen(cfg->chrootdir)-1] == '/') 634 fatal_exit("chootdir %s has trailing slash '/' please remove.", 635 cfg->chrootdir); 636 if(cfg->chrootdir && cfg->chrootdir[0] && 637 !is_dir(cfg->chrootdir)) { 638 fatal_exit("bad chroot directory"); 639 } 640 if(cfg->directory && cfg->directory[0]) { 641 char* ad = fname_after_chroot(cfg->directory, cfg, 0); 642 if(!ad) fatal_exit("out of memory"); 643 if(!is_dir(ad)) fatal_exit("bad chdir directory"); 644 free(ad); 645 } 646 if( (cfg->chrootdir && cfg->chrootdir[0]) || 647 (cfg->directory && cfg->directory[0])) { 648 if(cfg->pidfile && cfg->pidfile[0]) { 649 char* ad = (cfg->pidfile[0]=='/')?strdup(cfg->pidfile): 650 fname_after_chroot(cfg->pidfile, cfg, 1); 651 char* bd = basedir(ad); 652 if(bd && !is_dir(bd)) 653 fatal_exit("pidfile directory does not exist"); 654 free(ad); 655 } 656 if(cfg->logfile && cfg->logfile[0]) { 657 char* ad = fname_after_chroot(cfg->logfile, cfg, 1); 658 char* bd = basedir(ad); 659 if(bd && !is_dir(bd)) 660 fatal_exit("logfile directory does not exist"); 661 free(ad); 662 } 663 } 664 665 check_chroot_filelist("file with root-hints", 666 cfg->root_hints, cfg->chrootdir, cfg); 667 check_chroot_filelist("trust-anchor-file", 668 cfg->trust_anchor_file_list, cfg->chrootdir, cfg); 669 check_chroot_filelist("auto-trust-anchor-file", 670 cfg->auto_trust_anchor_file_list, cfg->chrootdir, cfg); 671 check_chroot_filelist_wild("trusted-keys-file", 672 cfg->trusted_keys_file_list, cfg->chrootdir, cfg); 673 #ifdef USE_IPSECMOD 674 if(cfg->ipsecmod_enabled && strstr(cfg->module_conf, "ipsecmod")) { 675 /* only check hook if enabled */ 676 check_chroot_string("ipsecmod-hook", &cfg->ipsecmod_hook, 677 cfg->chrootdir, cfg); 678 } 679 #endif 680 /* remove chroot setting so that modules are not stripping pathnames*/ 681 free(cfg->chrootdir); 682 cfg->chrootdir = NULL; 683 684 /* check that the modules listed in module_conf exist */ 685 check_modules_exist(cfg->module_conf); 686 687 /* Respip is known to *not* work with dns64. */ 688 if(strcmp(cfg->module_conf, "iterator") != 0 689 && strcmp(cfg->module_conf, "validator iterator") != 0 690 && strcmp(cfg->module_conf, "dns64 validator iterator") != 0 691 && strcmp(cfg->module_conf, "dns64 iterator") != 0 692 && strcmp(cfg->module_conf, "respip iterator") != 0 693 && strcmp(cfg->module_conf, "respip validator iterator") != 0 694 #ifdef WITH_PYTHONMODULE 695 && strcmp(cfg->module_conf, "python iterator") != 0 696 && strcmp(cfg->module_conf, "python respip iterator") != 0 697 && strcmp(cfg->module_conf, "python validator iterator") != 0 698 && strcmp(cfg->module_conf, "python respip validator iterator") != 0 699 && strcmp(cfg->module_conf, "validator python iterator") != 0 700 && strcmp(cfg->module_conf, "dns64 python iterator") != 0 701 && strcmp(cfg->module_conf, "dns64 python validator iterator") != 0 702 && strcmp(cfg->module_conf, "dns64 validator python iterator") != 0 703 && strcmp(cfg->module_conf, "python dns64 iterator") != 0 704 && strcmp(cfg->module_conf, "python dns64 validator iterator") != 0 705 #endif 706 #ifdef WITH_DYNLIBMODULE 707 && strcmp(cfg->module_conf, "dynlib iterator") != 0 708 && strcmp(cfg->module_conf, "dynlib dynlib iterator") != 0 709 && strcmp(cfg->module_conf, "dynlib dynlib dynlib iterator") != 0 710 && strcmp(cfg->module_conf, "python dynlib iterator") != 0 711 && strcmp(cfg->module_conf, "python dynlib dynlib iterator") != 0 712 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib iterator") != 0 713 && strcmp(cfg->module_conf, "dynlib respip iterator") != 0 714 && strcmp(cfg->module_conf, "dynlib validator iterator") != 0 715 && strcmp(cfg->module_conf, "dynlib dynlib validator iterator") != 0 716 && strcmp(cfg->module_conf, "dynlib dynlib dynlib validator iterator") != 0 717 && strcmp(cfg->module_conf, "python dynlib validator iterator") != 0 718 && strcmp(cfg->module_conf, "python dynlib dynlib validator iterator") != 0 719 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib validator iterator") != 0 720 && strcmp(cfg->module_conf, "dynlib respip validator iterator") != 0 721 && strcmp(cfg->module_conf, "validator dynlib iterator") != 0 722 && strcmp(cfg->module_conf, "dns64 dynlib iterator") != 0 723 && strcmp(cfg->module_conf, "dns64 dynlib validator iterator") != 0 724 && strcmp(cfg->module_conf, "dns64 validator dynlib iterator") != 0 725 && strcmp(cfg->module_conf, "dynlib dns64 iterator") != 0 726 && strcmp(cfg->module_conf, "dynlib dns64 validator iterator") != 0 727 && strcmp(cfg->module_conf, "dynlib dns64 cachedb iterator") != 0 728 && strcmp(cfg->module_conf, "dynlib dns64 validator cachedb iterator") != 0 729 && strcmp(cfg->module_conf, "dns64 dynlib cachedb iterator") != 0 730 && strcmp(cfg->module_conf, "dns64 dynlib validator cachedb iterator") != 0 731 && strcmp(cfg->module_conf, "dynlib cachedb iterator") != 0 732 && strcmp(cfg->module_conf, "dynlib respip cachedb iterator") != 0 733 && strcmp(cfg->module_conf, "dynlib validator cachedb iterator") != 0 734 && strcmp(cfg->module_conf, "dynlib respip validator cachedb iterator") != 0 735 && strcmp(cfg->module_conf, "cachedb dynlib iterator") != 0 736 && strcmp(cfg->module_conf, "respip cachedb dynlib iterator") != 0 737 && strcmp(cfg->module_conf, "validator cachedb dynlib iterator") != 0 738 && strcmp(cfg->module_conf, "respip validator cachedb dynlib iterator") != 0 739 && strcmp(cfg->module_conf, "validator dynlib cachedb iterator") != 0 740 && strcmp(cfg->module_conf, "respip validator dynlib cachedb iterator") != 0 741 && strcmp(cfg->module_conf, "dynlib subnetcache iterator") != 0 742 && strcmp(cfg->module_conf, "dynlib respip subnetcache iterator") != 0 743 && strcmp(cfg->module_conf, "subnetcache dynlib iterator") != 0 744 && strcmp(cfg->module_conf, "respip subnetcache dynlib iterator") != 0 745 && strcmp(cfg->module_conf, "dynlib subnetcache validator iterator") != 0 746 && strcmp(cfg->module_conf, "dynlib respip subnetcache validator iterator") != 0 747 && strcmp(cfg->module_conf, "subnetcache dynlib validator iterator") != 0 748 && strcmp(cfg->module_conf, "respip subnetcache dynlib validator iterator") != 0 749 && strcmp(cfg->module_conf, "subnetcache validator dynlib iterator") != 0 750 && strcmp(cfg->module_conf, "respip subnetcache validator dynlib iterator") != 0 751 && strcmp(cfg->module_conf, "dynlib ipsecmod iterator") != 0 752 && strcmp(cfg->module_conf, "dynlib ipsecmod respip iterator") != 0 753 && strcmp(cfg->module_conf, "ipsecmod dynlib iterator") != 0 754 && strcmp(cfg->module_conf, "ipsecmod dynlib respip iterator") != 0 755 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 756 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 757 && strcmp(cfg->module_conf, "dynlib ipsecmod validator iterator") != 0 758 && strcmp(cfg->module_conf, "dynlib ipsecmod respip validator iterator") != 0 759 && strcmp(cfg->module_conf, "ipsecmod dynlib validator iterator") != 0 760 && strcmp(cfg->module_conf, "ipsecmod dynlib respip validator iterator") != 0 761 && strcmp(cfg->module_conf, "ipsecmod validator dynlib iterator") != 0 762 && strcmp(cfg->module_conf, "ipsecmod respip validator dynlib iterator") != 0 763 #endif 764 #ifdef USE_CACHEDB 765 && strcmp(cfg->module_conf, "validator cachedb iterator") != 0 766 && strcmp(cfg->module_conf, "respip validator cachedb iterator") != 0 767 && strcmp(cfg->module_conf, "cachedb iterator") != 0 768 && strcmp(cfg->module_conf, "respip cachedb iterator") != 0 769 && strcmp(cfg->module_conf, "dns64 validator cachedb iterator") != 0 770 && strcmp(cfg->module_conf, "dns64 cachedb iterator") != 0 771 #endif 772 #if defined(WITH_PYTHONMODULE) && defined(USE_CACHEDB) 773 && strcmp(cfg->module_conf, "python dns64 cachedb iterator") != 0 774 && strcmp(cfg->module_conf, "python dns64 validator cachedb iterator") != 0 775 && strcmp(cfg->module_conf, "dns64 python cachedb iterator") != 0 776 && strcmp(cfg->module_conf, "dns64 python validator cachedb iterator") != 0 777 && strcmp(cfg->module_conf, "python cachedb iterator") != 0 778 && strcmp(cfg->module_conf, "python respip cachedb iterator") != 0 779 && strcmp(cfg->module_conf, "python validator cachedb iterator") != 0 780 && strcmp(cfg->module_conf, "python respip validator cachedb iterator") != 0 781 && strcmp(cfg->module_conf, "cachedb python iterator") != 0 782 && strcmp(cfg->module_conf, "respip cachedb python iterator") != 0 783 && strcmp(cfg->module_conf, "validator cachedb python iterator") != 0 784 && strcmp(cfg->module_conf, "respip validator cachedb python iterator") != 0 785 && strcmp(cfg->module_conf, "validator python cachedb iterator") != 0 786 && strcmp(cfg->module_conf, "respip validator python cachedb iterator") != 0 787 #endif 788 #ifdef CLIENT_SUBNET 789 && strcmp(cfg->module_conf, "subnetcache iterator") != 0 790 && strcmp(cfg->module_conf, "respip subnetcache iterator") != 0 791 && strcmp(cfg->module_conf, "subnetcache validator iterator") != 0 792 && strcmp(cfg->module_conf, "respip subnetcache validator iterator") != 0 793 && strcmp(cfg->module_conf, "dns64 subnetcache iterator") != 0 794 && strcmp(cfg->module_conf, "dns64 subnetcache validator iterator") != 0 795 && strcmp(cfg->module_conf, "dns64 subnetcache respip iterator") != 0 796 && strcmp(cfg->module_conf, "dns64 subnetcache respip validator iterator") != 0 797 #endif 798 #if defined(WITH_PYTHONMODULE) && defined(CLIENT_SUBNET) 799 && strcmp(cfg->module_conf, "python subnetcache iterator") != 0 800 && strcmp(cfg->module_conf, "python respip subnetcache iterator") != 0 801 && strcmp(cfg->module_conf, "subnetcache python iterator") != 0 802 && strcmp(cfg->module_conf, "respip subnetcache python iterator") != 0 803 && strcmp(cfg->module_conf, "python subnetcache validator iterator") != 0 804 && strcmp(cfg->module_conf, "python respip subnetcache validator iterator") != 0 805 && strcmp(cfg->module_conf, "subnetcache python validator iterator") != 0 806 && strcmp(cfg->module_conf, "respip subnetcache python validator iterator") != 0 807 && strcmp(cfg->module_conf, "subnetcache validator python iterator") != 0 808 && strcmp(cfg->module_conf, "respip subnetcache validator python iterator") != 0 809 #endif 810 #ifdef USE_IPSECMOD 811 && strcmp(cfg->module_conf, "ipsecmod iterator") != 0 812 && strcmp(cfg->module_conf, "ipsecmod respip iterator") != 0 813 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 814 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 815 #endif 816 #if defined(WITH_PYTHONMODULE) && defined(USE_IPSECMOD) 817 && strcmp(cfg->module_conf, "python ipsecmod iterator") != 0 818 && strcmp(cfg->module_conf, "python ipsecmod respip iterator") != 0 819 && strcmp(cfg->module_conf, "ipsecmod python iterator") != 0 820 && strcmp(cfg->module_conf, "ipsecmod python respip iterator") != 0 821 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 822 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 823 && strcmp(cfg->module_conf, "python ipsecmod validator iterator") != 0 824 && strcmp(cfg->module_conf, "python ipsecmod respip validator iterator") != 0 825 && strcmp(cfg->module_conf, "ipsecmod python validator iterator") != 0 826 && strcmp(cfg->module_conf, "ipsecmod python respip validator iterator") != 0 827 && strcmp(cfg->module_conf, "ipsecmod validator python iterator") != 0 828 && strcmp(cfg->module_conf, "ipsecmod respip validator python iterator") != 0 829 #endif 830 #ifdef USE_IPSET 831 && strcmp(cfg->module_conf, "validator ipset iterator") != 0 832 && strcmp(cfg->module_conf, "validator ipset respip iterator") != 0 833 && strcmp(cfg->module_conf, "ipset iterator") != 0 834 && strcmp(cfg->module_conf, "ipset respip iterator") != 0 835 #endif 836 ) { 837 fatal_exit("module conf '%s' is not known to work", 838 cfg->module_conf); 839 } 840 841 #ifdef HAVE_GETPWNAM 842 if(cfg->username && cfg->username[0]) { 843 if(getpwnam(cfg->username) == NULL) 844 fatal_exit("user '%s' does not exist.", cfg->username); 845 # ifdef HAVE_ENDPWENT 846 endpwent(); 847 # endif 848 } 849 #endif 850 if(cfg->remote_control_enable && options_remote_is_address(cfg) 851 && cfg->control_use_cert) { 852 check_chroot_string("server-key-file", &cfg->server_key_file, 853 cfg->chrootdir, cfg); 854 check_chroot_string("server-cert-file", &cfg->server_cert_file, 855 cfg->chrootdir, cfg); 856 if(!is_file(cfg->control_key_file)) 857 fatal_exit("control-key-file: \"%s\" does not exist", 858 cfg->control_key_file); 859 if(!is_file(cfg->control_cert_file)) 860 fatal_exit("control-cert-file: \"%s\" does not exist", 861 cfg->control_cert_file); 862 } 863 864 donotquerylocalhostcheck(cfg); 865 localzonechecks(cfg); 866 view_and_respipchecks(cfg); 867 #ifdef CLIENT_SUBNET 868 ecs_conf_checks(cfg); 869 #endif 870 } 871 872 /** check forwards */ 873 static void 874 check_fwd(struct config_file* cfg) 875 { 876 struct iter_forwards* fwd = forwards_create(); 877 if(!fwd || !forwards_apply_cfg(fwd, cfg)) { 878 fatal_exit("Could not set forward zones"); 879 } 880 forwards_delete(fwd); 881 } 882 883 /** check hints */ 884 static void 885 check_hints(struct config_file* cfg) 886 { 887 struct iter_hints* hints = hints_create(); 888 if(!hints || !hints_apply_cfg(hints, cfg)) { 889 fatal_exit("Could not set root or stub hints"); 890 } 891 hints_delete(hints); 892 } 893 894 /** check auth zones */ 895 static void 896 check_auth(struct config_file* cfg) 897 { 898 int is_rpz = 0; 899 struct auth_zones* az = auth_zones_create(); 900 if(!az || !auth_zones_apply_cfg(az, cfg, 0, &is_rpz, NULL, NULL)) { 901 fatal_exit("Could not setup authority zones"); 902 } 903 auth_zones_delete(az); 904 } 905 906 /** check config file */ 907 static void 908 checkconf(const char* cfgfile, const char* opt, int final) 909 { 910 char oldwd[4096]; 911 struct config_file* cfg = config_create(); 912 if(!cfg) 913 fatal_exit("out of memory"); 914 oldwd[0] = 0; 915 if(!getcwd(oldwd, sizeof(oldwd))) { 916 log_err("cannot getcwd: %s", strerror(errno)); 917 oldwd[0] = 0; 918 } 919 if(!config_read(cfg, cfgfile, NULL)) { 920 /* config_read prints messages to stderr */ 921 config_delete(cfg); 922 exit(1); 923 } 924 if(oldwd[0] && chdir(oldwd) == -1) 925 log_err("cannot chdir(%s): %s", oldwd, strerror(errno)); 926 if(opt) { 927 print_option(cfg, opt, final); 928 config_delete(cfg); 929 return; 930 } 931 morechecks(cfg); 932 check_mod(cfg, iter_get_funcblock()); 933 check_mod(cfg, val_get_funcblock()); 934 #ifdef WITH_PYTHONMODULE 935 if(strstr(cfg->module_conf, "python")) 936 check_mod(cfg, pythonmod_get_funcblock()); 937 #endif 938 check_fwd(cfg); 939 check_hints(cfg); 940 check_auth(cfg); 941 printf("unbound-checkconf: no errors in %s\n", cfgfile); 942 config_delete(cfg); 943 } 944 945 /** getopt global, in case header files fail to declare it. */ 946 extern int optind; 947 /** getopt global, in case header files fail to declare it. */ 948 extern char* optarg; 949 950 /** Main routine for checkconf */ 951 int main(int argc, char* argv[]) 952 { 953 int c; 954 int final = 0; 955 const char* f; 956 const char* opt = NULL; 957 const char* cfgfile = CONFIGFILE; 958 checklock_start(); 959 log_ident_set("unbound-checkconf"); 960 log_init(NULL, 0, NULL); 961 #ifdef USE_WINSOCK 962 /* use registry config file in preference to compiletime location */ 963 if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile"))) 964 cfgfile = CONFIGFILE; 965 #endif /* USE_WINSOCK */ 966 /* parse the options */ 967 while( (c=getopt(argc, argv, "fho:")) != -1) { 968 switch(c) { 969 case 'f': 970 final = 1; 971 break; 972 case 'o': 973 opt = optarg; 974 break; 975 case '?': 976 case 'h': 977 default: 978 usage(); 979 } 980 } 981 argc -= optind; 982 argv += optind; 983 if(argc != 0 && argc != 1) 984 usage(); 985 if(argc == 1) 986 f = argv[0]; 987 else f = cfgfile; 988 checkconf(f, opt, final); 989 checklock_stop(); 990 return 0; 991 } 992