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 interface-automatic-ports */ 412 static void 413 ifautomaticportschecks(char* ifautomaticports) 414 { 415 char* now = ifautomaticports; 416 while(now && *now) { 417 char* after; 418 int extraport; 419 while(isspace((unsigned char)*now)) 420 now++; 421 if(!*now) 422 break; 423 after = now; 424 extraport = (int)strtol(now, &after, 10); 425 if(extraport < 0 || extraport > 65535) 426 fatal_exit("interface-automatic-ports: port out of range at position %d in '%s'", (int)(now-ifautomaticports)+1, ifautomaticports); 427 if(extraport == 0 && now == after) 428 fatal_exit("interface-automatic-ports: parse error at position %d in '%s'", (int)(now-ifautomaticports)+1, ifautomaticports); 429 now = after; 430 } 431 } 432 433 /** check acl ips */ 434 static void 435 aclchecks(struct config_file* cfg) 436 { 437 int d; 438 struct sockaddr_storage a; 439 socklen_t alen; 440 struct config_str2list* acl; 441 for(acl=cfg->acls; acl; acl = acl->next) { 442 if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen, 443 &d)) { 444 fatal_exit("cannot parse access control address %s %s", 445 acl->str, acl->str2); 446 } 447 } 448 } 449 450 /** check tcp connection limit ips */ 451 static void 452 tcpconnlimitchecks(struct config_file* cfg) 453 { 454 int d; 455 struct sockaddr_storage a; 456 socklen_t alen; 457 struct config_str2list* tcl; 458 for(tcl=cfg->tcp_connection_limits; tcl; tcl = tcl->next) { 459 if(!netblockstrtoaddr(tcl->str, UNBOUND_DNS_PORT, &a, &alen, 460 &d)) { 461 fatal_exit("cannot parse tcp connection limit address %s %s", 462 tcl->str, tcl->str2); 463 } 464 } 465 } 466 467 /** true if fname is a file */ 468 static int 469 is_file(const char* fname) 470 { 471 struct stat buf; 472 if(stat(fname, &buf) < 0) { 473 if(errno==EACCES) { 474 printf("warning: no search permission for one of the directories in path: %s\n", fname); 475 return 1; 476 } 477 perror(fname); 478 return 0; 479 } 480 if(S_ISDIR(buf.st_mode)) { 481 printf("%s is not a file\n", fname); 482 return 0; 483 } 484 return 1; 485 } 486 487 /** true if fname is a directory */ 488 static int 489 is_dir(const char* fname) 490 { 491 struct stat buf; 492 if(stat(fname, &buf) < 0) { 493 if(errno==EACCES) { 494 printf("warning: no search permission for one of the directories in path: %s\n", fname); 495 return 1; 496 } 497 perror(fname); 498 return 0; 499 } 500 if(!(S_ISDIR(buf.st_mode))) { 501 printf("%s is not a directory\n", fname); 502 return 0; 503 } 504 return 1; 505 } 506 507 /** get base dir of a fname */ 508 static char* 509 basedir(char* fname) 510 { 511 char* rev; 512 if(!fname) fatal_exit("out of memory"); 513 rev = strrchr(fname, '/'); 514 if(!rev) return NULL; 515 if(fname == rev) return NULL; 516 rev[0] = 0; 517 return fname; 518 } 519 520 /** check chroot for a file string */ 521 static void 522 check_chroot_string(const char* desc, char** ss, 523 const char* chrootdir, struct config_file* cfg) 524 { 525 char* str = *ss; 526 if(str && str[0]) { 527 *ss = fname_after_chroot(str, cfg, 1); 528 if(!*ss) fatal_exit("out of memory"); 529 if(!is_file(*ss)) { 530 if(chrootdir && chrootdir[0]) 531 fatal_exit("%s: \"%s\" does not exist in " 532 "chrootdir %s", desc, str, chrootdir); 533 else 534 fatal_exit("%s: \"%s\" does not exist", 535 desc, str); 536 } 537 /* put in a new full path for continued checking */ 538 free(str); 539 } 540 } 541 542 /** check file list, every file must be inside the chroot location */ 543 static void 544 check_chroot_filelist(const char* desc, struct config_strlist* list, 545 const char* chrootdir, struct config_file* cfg) 546 { 547 struct config_strlist* p; 548 for(p=list; p; p=p->next) { 549 check_chroot_string(desc, &p->str, chrootdir, cfg); 550 } 551 } 552 553 /** check file list, with wildcard processing */ 554 static void 555 check_chroot_filelist_wild(const char* desc, struct config_strlist* list, 556 const char* chrootdir, struct config_file* cfg) 557 { 558 struct config_strlist* p; 559 for(p=list; p; p=p->next) { 560 #ifdef HAVE_GLOB 561 if(strchr(p->str, '*') || strchr(p->str, '[') || 562 strchr(p->str, '?') || strchr(p->str, '{') || 563 strchr(p->str, '~')) { 564 char* s = p->str; 565 /* adjust whole pattern for chroot and check later */ 566 p->str = fname_after_chroot(p->str, cfg, 1); 567 free(s); 568 } else 569 #endif /* HAVE_GLOB */ 570 check_chroot_string(desc, &p->str, chrootdir, cfg); 571 } 572 } 573 574 #ifdef CLIENT_SUBNET 575 /** check ECS configuration */ 576 static void 577 ecs_conf_checks(struct config_file* cfg) 578 { 579 struct ecs_whitelist* whitelist = NULL; 580 if(!(whitelist = ecs_whitelist_create())) 581 fatal_exit("Could not create ednssubnet whitelist: out of memory"); 582 if(!ecs_whitelist_apply_cfg(whitelist, cfg)) 583 fatal_exit("Could not setup ednssubnet whitelist"); 584 ecs_whitelist_delete(whitelist); 585 } 586 #endif /* CLIENT_SUBNET */ 587 588 /** check that the modules exist, are compiled in */ 589 static void 590 check_modules_exist(const char* module_conf) 591 { 592 const char** names = module_list_avail(); 593 const char* s = module_conf; 594 while(*s) { 595 int i = 0; 596 int is_ok = 0; 597 while(*s && isspace((unsigned char)*s)) 598 s++; 599 if(!*s) break; 600 while(names[i]) { 601 if(strncmp(names[i], s, strlen(names[i])) == 0) { 602 is_ok = 1; 603 break; 604 } 605 i++; 606 } 607 if(is_ok == 0) { 608 char n[64]; 609 size_t j; 610 n[0]=0; 611 n[sizeof(n)-1]=0; 612 for(j=0; j<sizeof(n)-1; j++) { 613 if(!s[j] || isspace((unsigned char)s[j])) { 614 n[j] = 0; 615 break; 616 } 617 n[j] = s[j]; 618 } 619 fatal_exit("module_conf lists module '%s' but that " 620 "module is not available.", n); 621 } 622 s += strlen(names[i]); 623 } 624 } 625 626 /** check configuration for errors */ 627 static void 628 morechecks(struct config_file* cfg) 629 { 630 warn_hosts("stub-host", cfg->stubs); 631 warn_hosts("forward-host", cfg->forwards); 632 interfacechecks(cfg); 633 ifautomaticportschecks(cfg->if_automatic_ports); 634 aclchecks(cfg); 635 tcpconnlimitchecks(cfg); 636 637 if(cfg->verbosity < 0) 638 fatal_exit("verbosity value < 0"); 639 if(cfg->num_threads <= 0 || cfg->num_threads > 10000) 640 fatal_exit("num_threads value weird"); 641 if(!cfg->do_ip4 && !cfg->do_ip6) 642 fatal_exit("ip4 and ip6 are both disabled, pointless"); 643 if(!cfg->do_ip4 && cfg->prefer_ip4) 644 fatal_exit("cannot prefer and disable ip4, pointless"); 645 if(!cfg->do_ip6 && cfg->prefer_ip6) 646 fatal_exit("cannot prefer and disable ip6, pointless"); 647 if(!cfg->do_udp && !cfg->do_tcp) 648 fatal_exit("udp and tcp are both disabled, pointless"); 649 if(cfg->edns_buffer_size > cfg->msg_buffer_size) 650 fatal_exit("edns-buffer-size larger than msg-buffer-size, " 651 "answers will not fit in processing buffer"); 652 #ifdef UB_ON_WINDOWS 653 w_config_adjust_directory(cfg); 654 #endif 655 if(cfg->chrootdir && cfg->chrootdir[0] && 656 cfg->chrootdir[strlen(cfg->chrootdir)-1] == '/') 657 fatal_exit("chootdir %s has trailing slash '/' please remove.", 658 cfg->chrootdir); 659 if(cfg->chrootdir && cfg->chrootdir[0] && 660 !is_dir(cfg->chrootdir)) { 661 fatal_exit("bad chroot directory"); 662 } 663 if(cfg->directory && cfg->directory[0]) { 664 char* ad = fname_after_chroot(cfg->directory, cfg, 0); 665 if(!ad) fatal_exit("out of memory"); 666 if(!is_dir(ad)) fatal_exit("bad chdir directory"); 667 free(ad); 668 } 669 if( (cfg->chrootdir && cfg->chrootdir[0]) || 670 (cfg->directory && cfg->directory[0])) { 671 if(cfg->pidfile && cfg->pidfile[0]) { 672 char* ad = (cfg->pidfile[0]=='/')?strdup(cfg->pidfile): 673 fname_after_chroot(cfg->pidfile, cfg, 1); 674 char* bd = basedir(ad); 675 if(bd && !is_dir(bd)) 676 fatal_exit("pidfile directory does not exist"); 677 free(ad); 678 } 679 if(cfg->logfile && cfg->logfile[0]) { 680 char* ad = fname_after_chroot(cfg->logfile, cfg, 1); 681 char* bd = basedir(ad); 682 if(bd && !is_dir(bd)) 683 fatal_exit("logfile directory does not exist"); 684 free(ad); 685 } 686 } 687 688 check_chroot_filelist("file with root-hints", 689 cfg->root_hints, cfg->chrootdir, cfg); 690 check_chroot_filelist("trust-anchor-file", 691 cfg->trust_anchor_file_list, cfg->chrootdir, cfg); 692 check_chroot_filelist("auto-trust-anchor-file", 693 cfg->auto_trust_anchor_file_list, cfg->chrootdir, cfg); 694 check_chroot_filelist_wild("trusted-keys-file", 695 cfg->trusted_keys_file_list, cfg->chrootdir, cfg); 696 #ifdef USE_IPSECMOD 697 if(cfg->ipsecmod_enabled && strstr(cfg->module_conf, "ipsecmod")) { 698 /* only check hook if enabled */ 699 check_chroot_string("ipsecmod-hook", &cfg->ipsecmod_hook, 700 cfg->chrootdir, cfg); 701 } 702 #endif 703 /* remove chroot setting so that modules are not stripping pathnames*/ 704 free(cfg->chrootdir); 705 cfg->chrootdir = NULL; 706 707 /* check that the modules listed in module_conf exist */ 708 check_modules_exist(cfg->module_conf); 709 710 /* Respip is known to *not* work with dns64. */ 711 if(strcmp(cfg->module_conf, "iterator") != 0 712 && strcmp(cfg->module_conf, "validator iterator") != 0 713 && strcmp(cfg->module_conf, "dns64 validator iterator") != 0 714 && strcmp(cfg->module_conf, "dns64 iterator") != 0 715 && strcmp(cfg->module_conf, "respip iterator") != 0 716 && strcmp(cfg->module_conf, "respip validator iterator") != 0 717 && strcmp(cfg->module_conf, "respip dns64 validator iterator") != 0 718 && strcmp(cfg->module_conf, "respip dns64 iterator") != 0 719 #ifdef WITH_PYTHONMODULE 720 && strcmp(cfg->module_conf, "python iterator") != 0 721 && strcmp(cfg->module_conf, "python respip iterator") != 0 722 && strcmp(cfg->module_conf, "python validator iterator") != 0 723 && strcmp(cfg->module_conf, "python respip validator iterator") != 0 724 && strcmp(cfg->module_conf, "validator python iterator") != 0 725 && strcmp(cfg->module_conf, "dns64 python iterator") != 0 726 && strcmp(cfg->module_conf, "dns64 python validator iterator") != 0 727 && strcmp(cfg->module_conf, "dns64 validator python iterator") != 0 728 && strcmp(cfg->module_conf, "python dns64 iterator") != 0 729 && strcmp(cfg->module_conf, "python dns64 validator iterator") != 0 730 #endif 731 #ifdef WITH_DYNLIBMODULE 732 && strcmp(cfg->module_conf, "dynlib iterator") != 0 733 && strcmp(cfg->module_conf, "dynlib dynlib iterator") != 0 734 && strcmp(cfg->module_conf, "dynlib dynlib dynlib iterator") != 0 735 && strcmp(cfg->module_conf, "python dynlib iterator") != 0 736 && strcmp(cfg->module_conf, "python dynlib dynlib iterator") != 0 737 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib iterator") != 0 738 && strcmp(cfg->module_conf, "dynlib respip iterator") != 0 739 && strcmp(cfg->module_conf, "dynlib validator iterator") != 0 740 && strcmp(cfg->module_conf, "dynlib dynlib validator iterator") != 0 741 && strcmp(cfg->module_conf, "dynlib dynlib dynlib validator iterator") != 0 742 && strcmp(cfg->module_conf, "python dynlib validator iterator") != 0 743 && strcmp(cfg->module_conf, "python dynlib dynlib validator iterator") != 0 744 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib validator iterator") != 0 745 && strcmp(cfg->module_conf, "dynlib respip validator iterator") != 0 746 && strcmp(cfg->module_conf, "validator dynlib iterator") != 0 747 && strcmp(cfg->module_conf, "dns64 dynlib iterator") != 0 748 && strcmp(cfg->module_conf, "dns64 dynlib validator iterator") != 0 749 && strcmp(cfg->module_conf, "dns64 validator dynlib iterator") != 0 750 && strcmp(cfg->module_conf, "dynlib dns64 iterator") != 0 751 && strcmp(cfg->module_conf, "dynlib dns64 validator iterator") != 0 752 && strcmp(cfg->module_conf, "dynlib dns64 cachedb iterator") != 0 753 && strcmp(cfg->module_conf, "dynlib dns64 validator cachedb iterator") != 0 754 && strcmp(cfg->module_conf, "dns64 dynlib cachedb iterator") != 0 755 && strcmp(cfg->module_conf, "dns64 dynlib validator cachedb iterator") != 0 756 && strcmp(cfg->module_conf, "dynlib cachedb iterator") != 0 757 && strcmp(cfg->module_conf, "dynlib respip cachedb iterator") != 0 758 && strcmp(cfg->module_conf, "dynlib validator cachedb iterator") != 0 759 && strcmp(cfg->module_conf, "dynlib respip validator cachedb iterator") != 0 760 && strcmp(cfg->module_conf, "cachedb dynlib iterator") != 0 761 && strcmp(cfg->module_conf, "respip cachedb dynlib iterator") != 0 762 && strcmp(cfg->module_conf, "validator cachedb dynlib iterator") != 0 763 && strcmp(cfg->module_conf, "respip validator cachedb dynlib iterator") != 0 764 && strcmp(cfg->module_conf, "validator dynlib cachedb iterator") != 0 765 && strcmp(cfg->module_conf, "respip validator dynlib cachedb iterator") != 0 766 && strcmp(cfg->module_conf, "dynlib subnetcache iterator") != 0 767 && strcmp(cfg->module_conf, "dynlib respip subnetcache iterator") != 0 768 && strcmp(cfg->module_conf, "subnetcache dynlib iterator") != 0 769 && strcmp(cfg->module_conf, "respip subnetcache dynlib iterator") != 0 770 && strcmp(cfg->module_conf, "dynlib subnetcache validator iterator") != 0 771 && strcmp(cfg->module_conf, "dynlib respip subnetcache validator iterator") != 0 772 && strcmp(cfg->module_conf, "subnetcache dynlib validator iterator") != 0 773 && strcmp(cfg->module_conf, "respip subnetcache dynlib validator iterator") != 0 774 && strcmp(cfg->module_conf, "subnetcache validator dynlib iterator") != 0 775 && strcmp(cfg->module_conf, "respip subnetcache validator dynlib iterator") != 0 776 && strcmp(cfg->module_conf, "dynlib ipsecmod iterator") != 0 777 && strcmp(cfg->module_conf, "dynlib ipsecmod respip iterator") != 0 778 && strcmp(cfg->module_conf, "ipsecmod dynlib iterator") != 0 779 && strcmp(cfg->module_conf, "ipsecmod dynlib respip iterator") != 0 780 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 781 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 782 && strcmp(cfg->module_conf, "dynlib ipsecmod validator iterator") != 0 783 && strcmp(cfg->module_conf, "dynlib ipsecmod respip validator iterator") != 0 784 && strcmp(cfg->module_conf, "ipsecmod dynlib validator iterator") != 0 785 && strcmp(cfg->module_conf, "ipsecmod dynlib respip validator iterator") != 0 786 && strcmp(cfg->module_conf, "ipsecmod validator dynlib iterator") != 0 787 && strcmp(cfg->module_conf, "ipsecmod respip validator dynlib iterator") != 0 788 #endif 789 #ifdef USE_CACHEDB 790 && strcmp(cfg->module_conf, "validator cachedb iterator") != 0 791 && strcmp(cfg->module_conf, "respip validator cachedb iterator") != 0 792 && strcmp(cfg->module_conf, "cachedb iterator") != 0 793 && strcmp(cfg->module_conf, "respip cachedb iterator") != 0 794 && strcmp(cfg->module_conf, "dns64 validator cachedb iterator") != 0 795 && strcmp(cfg->module_conf, "dns64 cachedb iterator") != 0 796 #endif 797 #if defined(WITH_PYTHONMODULE) && defined(USE_CACHEDB) 798 && strcmp(cfg->module_conf, "python dns64 cachedb iterator") != 0 799 && strcmp(cfg->module_conf, "python dns64 validator cachedb iterator") != 0 800 && strcmp(cfg->module_conf, "dns64 python cachedb iterator") != 0 801 && strcmp(cfg->module_conf, "dns64 python validator cachedb iterator") != 0 802 && strcmp(cfg->module_conf, "python cachedb iterator") != 0 803 && strcmp(cfg->module_conf, "python respip cachedb iterator") != 0 804 && strcmp(cfg->module_conf, "python validator cachedb iterator") != 0 805 && strcmp(cfg->module_conf, "python respip validator cachedb iterator") != 0 806 && strcmp(cfg->module_conf, "cachedb python iterator") != 0 807 && strcmp(cfg->module_conf, "respip cachedb python iterator") != 0 808 && strcmp(cfg->module_conf, "validator cachedb python iterator") != 0 809 && strcmp(cfg->module_conf, "respip validator cachedb python iterator") != 0 810 && strcmp(cfg->module_conf, "validator python cachedb iterator") != 0 811 && strcmp(cfg->module_conf, "respip validator python cachedb iterator") != 0 812 #endif 813 #if defined(CLIENT_SUBNET) && defined(USE_CACHEDB) 814 && strcmp(cfg->module_conf, "respip subnetcache validator cachedb iterator") != 0 815 && strcmp(cfg->module_conf, "subnetcache validator cachedb iterator") != 0 816 #endif 817 #ifdef CLIENT_SUBNET 818 && strcmp(cfg->module_conf, "subnetcache iterator") != 0 819 && strcmp(cfg->module_conf, "respip subnetcache iterator") != 0 820 && strcmp(cfg->module_conf, "subnetcache validator iterator") != 0 821 && strcmp(cfg->module_conf, "respip subnetcache validator iterator") != 0 822 && strcmp(cfg->module_conf, "dns64 subnetcache iterator") != 0 823 && strcmp(cfg->module_conf, "dns64 subnetcache validator iterator") != 0 824 && strcmp(cfg->module_conf, "dns64 subnetcache respip iterator") != 0 825 && strcmp(cfg->module_conf, "dns64 subnetcache respip validator iterator") != 0 826 #endif 827 #if defined(WITH_PYTHONMODULE) && defined(CLIENT_SUBNET) 828 && strcmp(cfg->module_conf, "python subnetcache iterator") != 0 829 && strcmp(cfg->module_conf, "python respip subnetcache iterator") != 0 830 && strcmp(cfg->module_conf, "subnetcache python iterator") != 0 831 && strcmp(cfg->module_conf, "respip subnetcache python iterator") != 0 832 && strcmp(cfg->module_conf, "python subnetcache validator iterator") != 0 833 && strcmp(cfg->module_conf, "python respip subnetcache validator iterator") != 0 834 && strcmp(cfg->module_conf, "subnetcache python validator iterator") != 0 835 && strcmp(cfg->module_conf, "respip subnetcache python validator iterator") != 0 836 && strcmp(cfg->module_conf, "subnetcache validator python iterator") != 0 837 && strcmp(cfg->module_conf, "respip subnetcache validator python iterator") != 0 838 #endif 839 #ifdef USE_IPSECMOD 840 && strcmp(cfg->module_conf, "ipsecmod iterator") != 0 841 && strcmp(cfg->module_conf, "ipsecmod respip iterator") != 0 842 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 843 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 844 #endif 845 #if defined(WITH_PYTHONMODULE) && defined(USE_IPSECMOD) 846 && strcmp(cfg->module_conf, "python ipsecmod iterator") != 0 847 && strcmp(cfg->module_conf, "python ipsecmod respip iterator") != 0 848 && strcmp(cfg->module_conf, "ipsecmod python iterator") != 0 849 && strcmp(cfg->module_conf, "ipsecmod python respip iterator") != 0 850 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 851 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 852 && strcmp(cfg->module_conf, "python ipsecmod validator iterator") != 0 853 && strcmp(cfg->module_conf, "python ipsecmod respip validator iterator") != 0 854 && strcmp(cfg->module_conf, "ipsecmod python validator iterator") != 0 855 && strcmp(cfg->module_conf, "ipsecmod python respip validator iterator") != 0 856 && strcmp(cfg->module_conf, "ipsecmod validator python iterator") != 0 857 && strcmp(cfg->module_conf, "ipsecmod respip validator python iterator") != 0 858 #endif 859 #ifdef USE_IPSET 860 && strcmp(cfg->module_conf, "validator ipset iterator") != 0 861 && strcmp(cfg->module_conf, "validator ipset respip iterator") != 0 862 && strcmp(cfg->module_conf, "ipset iterator") != 0 863 && strcmp(cfg->module_conf, "ipset respip iterator") != 0 864 #endif 865 ) { 866 fatal_exit("module conf '%s' is not known to work", 867 cfg->module_conf); 868 } 869 870 #ifdef HAVE_GETPWNAM 871 if(cfg->username && cfg->username[0]) { 872 if(getpwnam(cfg->username) == NULL) 873 fatal_exit("user '%s' does not exist.", cfg->username); 874 # ifdef HAVE_ENDPWENT 875 endpwent(); 876 # endif 877 } 878 #endif 879 if(cfg->remote_control_enable && options_remote_is_address(cfg) 880 && cfg->control_use_cert) { 881 check_chroot_string("server-key-file", &cfg->server_key_file, 882 cfg->chrootdir, cfg); 883 check_chroot_string("server-cert-file", &cfg->server_cert_file, 884 cfg->chrootdir, cfg); 885 if(!is_file(cfg->control_key_file)) 886 fatal_exit("control-key-file: \"%s\" does not exist", 887 cfg->control_key_file); 888 if(!is_file(cfg->control_cert_file)) 889 fatal_exit("control-cert-file: \"%s\" does not exist", 890 cfg->control_cert_file); 891 } 892 893 donotquerylocalhostcheck(cfg); 894 localzonechecks(cfg); 895 view_and_respipchecks(cfg); 896 #ifdef CLIENT_SUBNET 897 ecs_conf_checks(cfg); 898 #endif 899 } 900 901 /** check forwards */ 902 static void 903 check_fwd(struct config_file* cfg) 904 { 905 struct iter_forwards* fwd = forwards_create(); 906 if(!fwd || !forwards_apply_cfg(fwd, cfg)) { 907 fatal_exit("Could not set forward zones"); 908 } 909 forwards_delete(fwd); 910 } 911 912 /** check hints */ 913 static void 914 check_hints(struct config_file* cfg) 915 { 916 struct iter_hints* hints = hints_create(); 917 if(!hints || !hints_apply_cfg(hints, cfg)) { 918 fatal_exit("Could not set root or stub hints"); 919 } 920 hints_delete(hints); 921 } 922 923 /** check auth zones */ 924 static void 925 check_auth(struct config_file* cfg) 926 { 927 int is_rpz = 0; 928 struct auth_zones* az = auth_zones_create(); 929 if(!az || !auth_zones_apply_cfg(az, cfg, 0, &is_rpz, NULL, NULL)) { 930 fatal_exit("Could not setup authority zones"); 931 } 932 auth_zones_delete(az); 933 } 934 935 /** check config file */ 936 static void 937 checkconf(const char* cfgfile, const char* opt, int final) 938 { 939 char oldwd[4096]; 940 struct config_file* cfg = config_create(); 941 if(!cfg) 942 fatal_exit("out of memory"); 943 oldwd[0] = 0; 944 if(!getcwd(oldwd, sizeof(oldwd))) { 945 log_err("cannot getcwd: %s", strerror(errno)); 946 oldwd[0] = 0; 947 } 948 if(!config_read(cfg, cfgfile, NULL)) { 949 /* config_read prints messages to stderr */ 950 config_delete(cfg); 951 exit(1); 952 } 953 if(oldwd[0] && chdir(oldwd) == -1) 954 log_err("cannot chdir(%s): %s", oldwd, strerror(errno)); 955 if(opt) { 956 print_option(cfg, opt, final); 957 config_delete(cfg); 958 return; 959 } 960 morechecks(cfg); 961 check_mod(cfg, iter_get_funcblock()); 962 check_mod(cfg, val_get_funcblock()); 963 #ifdef WITH_PYTHONMODULE 964 if(strstr(cfg->module_conf, "python")) 965 check_mod(cfg, pythonmod_get_funcblock()); 966 #endif 967 check_fwd(cfg); 968 check_hints(cfg); 969 check_auth(cfg); 970 printf("unbound-checkconf: no errors in %s\n", cfgfile); 971 config_delete(cfg); 972 } 973 974 /** getopt global, in case header files fail to declare it. */ 975 extern int optind; 976 /** getopt global, in case header files fail to declare it. */ 977 extern char* optarg; 978 979 /** Main routine for checkconf */ 980 int main(int argc, char* argv[]) 981 { 982 int c; 983 int final = 0; 984 const char* f; 985 const char* opt = NULL; 986 const char* cfgfile = CONFIGFILE; 987 checklock_start(); 988 log_ident_set("unbound-checkconf"); 989 log_init(NULL, 0, NULL); 990 #ifdef USE_WINSOCK 991 /* use registry config file in preference to compiletime location */ 992 if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile"))) 993 cfgfile = CONFIGFILE; 994 #endif /* USE_WINSOCK */ 995 /* parse the options */ 996 while( (c=getopt(argc, argv, "fho:")) != -1) { 997 switch(c) { 998 case 'f': 999 final = 1; 1000 break; 1001 case 'o': 1002 opt = optarg; 1003 break; 1004 case '?': 1005 case 'h': 1006 default: 1007 usage(); 1008 } 1009 } 1010 argc -= optind; 1011 argv += optind; 1012 if(argc != 0 && argc != 1) 1013 usage(); 1014 if(argc == 1) 1015 f = argv[0]; 1016 else f = cfgfile; 1017 checkconf(f, opt, final); 1018 checklock_stop(); 1019 return 0; 1020 } 1021