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("-q quiet (suppress output on success).\n"); 92 printf("-h show this usage help.\n"); 93 printf("Version %s\n", PACKAGE_VERSION); 94 printf("BSD licensed, see LICENSE in source package for details.\n"); 95 printf("Report bugs to %s\n", PACKAGE_BUGREPORT); 96 exit(1); 97 } 98 99 /** 100 * Print given option to stdout 101 * @param cfg: config 102 * @param opt: option name without trailing :. 103 * This is different from config_set_option. 104 * @param final: if final pathname with chroot applied has to be printed. 105 */ 106 static void 107 print_option(struct config_file* cfg, const char* opt, int final) 108 { 109 if(strcmp(opt, "pidfile") == 0 && final) { 110 char *p = fname_after_chroot(cfg->pidfile, cfg, 1); 111 if(!p) fatal_exit("out of memory"); 112 printf("%s\n", p); 113 free(p); 114 return; 115 } 116 if(strcmp(opt, "auto-trust-anchor-file") == 0 && final) { 117 struct config_strlist* s = cfg->auto_trust_anchor_file_list; 118 for(; s; s=s->next) { 119 char *p = fname_after_chroot(s->str, cfg, 1); 120 if(!p) fatal_exit("out of memory"); 121 printf("%s\n", p); 122 free(p); 123 } 124 return; 125 } 126 if(!config_get_option(cfg, opt, config_print_func, stdout)) 127 fatal_exit("cannot print option '%s'", opt); 128 } 129 130 /** check if module works with config */ 131 static void 132 check_mod(struct config_file* cfg, struct module_func_block* fb) 133 { 134 struct module_env env; 135 memset(&env, 0, sizeof(env)); 136 env.cfg = cfg; 137 env.scratch = regional_create(); 138 env.scratch_buffer = sldns_buffer_new(BUFSIZ); 139 if(!env.scratch || !env.scratch_buffer) 140 fatal_exit("out of memory"); 141 if(!edns_known_options_init(&env)) 142 fatal_exit("out of memory"); 143 if(fb->startup && !(*fb->startup)(&env, 0)) 144 fatal_exit("bad config during startup for %s module", fb->name); 145 if(!(*fb->init)(&env, 0)) 146 fatal_exit("bad config during init for %s module", fb->name); 147 (*fb->deinit)(&env, 0); 148 if(fb->destartup) 149 (*fb->destartup)(&env, 0); 150 sldns_buffer_free(env.scratch_buffer); 151 regional_destroy(env.scratch); 152 edns_known_options_delete(&env); 153 } 154 155 /** true if addr is a localhost address, 127.0.0.1 or ::1 (with maybe "@port" 156 * after it) */ 157 static int 158 str_addr_is_localhost(const char* a) 159 { 160 if(strncmp(a, "127.", 4) == 0) return 1; 161 if(strncmp(a, "::1", 3) == 0) return 1; 162 return 0; 163 } 164 165 /** check do-not-query-localhost */ 166 static void 167 donotquerylocalhostcheck(struct config_file* cfg) 168 { 169 if(cfg->donotquery_localhost) { 170 struct config_stub* p; 171 struct config_strlist* s; 172 for(p=cfg->forwards; p; p=p->next) { 173 for(s=p->addrs; s; s=s->next) { 174 if(str_addr_is_localhost(s->str)) { 175 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", 176 s->str, p->name); 177 } 178 } 179 } 180 for(p=cfg->stubs; p; p=p->next) { 181 for(s=p->addrs; s; s=s->next) { 182 if(str_addr_is_localhost(s->str)) { 183 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", 184 s->str, p->name); 185 } 186 } 187 } 188 } 189 } 190 191 /** check localzones */ 192 static void 193 localzonechecks(struct config_file* cfg) 194 { 195 struct local_zones* zs; 196 if(!(zs = local_zones_create())) 197 fatal_exit("out of memory"); 198 if(!local_zones_apply_cfg(zs, cfg)) 199 fatal_exit("failed local-zone, local-data configuration"); 200 local_zones_delete(zs); 201 } 202 203 /** checks for acl and views */ 204 static void 205 acl_view_tag_checks(struct config_file* cfg, struct views* views) 206 { 207 int d; 208 struct sockaddr_storage a; 209 socklen_t alen; 210 struct config_str2list* acl; 211 struct config_str3list* s3; 212 struct config_strbytelist* sb; 213 214 /* acl_view */ 215 for(acl=cfg->acl_view; acl; acl = acl->next) { 216 struct view* v; 217 if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen, 218 &d)) { 219 fatal_exit("cannot parse access-control-view " 220 "address %s %s", acl->str, acl->str2); 221 } 222 v = views_find_view(views, acl->str2, 0); 223 if(!v) { 224 fatal_exit("cannot find view for " 225 "access-control-view: %s %s", 226 acl->str, acl->str2); 227 } 228 lock_rw_unlock(&v->lock); 229 } 230 231 /* acl_tags */ 232 for(sb=cfg->acl_tags; sb; sb = sb->next) { 233 if(!netblockstrtoaddr(sb->str, UNBOUND_DNS_PORT, &a, &alen, 234 &d)) { 235 fatal_exit("cannot parse access-control-tags " 236 "address %s", sb->str); 237 } 238 } 239 240 /* acl_tag_actions */ 241 for(s3=cfg->acl_tag_actions; s3; s3 = s3->next) { 242 enum localzone_type t; 243 if(!netblockstrtoaddr(s3->str, UNBOUND_DNS_PORT, &a, &alen, 244 &d)) { 245 fatal_exit("cannot parse access-control-tag-actions " 246 "address %s %s %s", 247 s3->str, s3->str2, s3->str3); 248 } 249 if(find_tag_id(cfg, s3->str2) == -1) { 250 fatal_exit("cannot parse tag %s (define-tag it), " 251 "for access-control-tag-actions: %s %s %s", 252 s3->str2, s3->str, s3->str2, s3->str3); 253 } 254 if(!local_zone_str2type(s3->str3, &t)) { 255 fatal_exit("cannot parse access control action type %s" 256 " for access-control-tag-actions: %s %s %s", 257 s3->str3, s3->str, s3->str2, s3->str3); 258 } 259 } 260 261 /* acl_tag_datas */ 262 for(s3=cfg->acl_tag_datas; s3; s3 = s3->next) { 263 char buf[65536]; 264 uint8_t rr[LDNS_RR_BUF_SIZE]; 265 size_t len = sizeof(rr); 266 int res; 267 if(!netblockstrtoaddr(s3->str, UNBOUND_DNS_PORT, &a, &alen, 268 &d)) { 269 fatal_exit("cannot parse access-control-tag-datas address %s %s '%s'", 270 s3->str, s3->str2, s3->str3); 271 } 272 if(find_tag_id(cfg, s3->str2) == -1) { 273 fatal_exit("cannot parse tag %s (define-tag it), " 274 "for access-control-tag-datas: %s %s '%s'", 275 s3->str2, s3->str, s3->str2, s3->str3); 276 } 277 /* '.' is sufficient for validation, and it makes the call to 278 * sldns_wirerr_get_type() simpler below. */ 279 snprintf(buf, sizeof(buf), "%s %s", ".", s3->str3); 280 res = sldns_str2wire_rr_buf(buf, rr, &len, NULL, 3600, NULL, 281 0, NULL, 0); 282 if(res != 0) { 283 fatal_exit("cannot parse rr data [char %d] parse error %s, for access-control-tag-datas: %s %s '%s'", 284 (int)LDNS_WIREPARSE_OFFSET(res)-2, 285 sldns_get_errorstr_parse(res), 286 s3->str, s3->str2, s3->str3); 287 } 288 } 289 } 290 291 /** check view and response-ip configuration */ 292 static void 293 view_and_respipchecks(struct config_file* cfg) 294 { 295 struct views* views = NULL; 296 struct respip_set* respip = NULL; 297 int ignored = 0; 298 if(!(views = views_create())) 299 fatal_exit("Could not create views: out of memory"); 300 if(!(respip = respip_set_create())) 301 fatal_exit("Could not create respip set: out of memory"); 302 if(!views_apply_cfg(views, cfg)) 303 fatal_exit("Could not set up views"); 304 if(!respip_global_apply_cfg(respip, cfg)) 305 fatal_exit("Could not setup respip set"); 306 if(!respip_views_apply_cfg(views, cfg, &ignored)) 307 fatal_exit("Could not setup per-view respip sets"); 308 acl_view_tag_checks(cfg, views); 309 views_delete(views); 310 respip_set_delete(respip); 311 } 312 313 /** emit warnings for IP in hosts */ 314 static void 315 warn_hosts(const char* typ, struct config_stub* list) 316 { 317 struct sockaddr_storage a; 318 socklen_t alen; 319 struct config_stub* s; 320 struct config_strlist* h; 321 for(s=list; s; s=s->next) { 322 for(h=s->hosts; h; h=h->next) { 323 if(extstrtoaddr(h->str, &a, &alen, UNBOUND_DNS_PORT)) { 324 fprintf(stderr, "unbound-checkconf: warning:" 325 " %s %s: \"%s\" is an IP%s address, " 326 "and when looked up as a host name " 327 "during use may not resolve.\n", 328 s->name, typ, h->str, 329 addr_is_ip6(&a, alen)?"6":"4"); 330 } 331 } 332 } 333 } 334 335 /** check interface strings */ 336 static void 337 interfacechecks(struct config_file* cfg) 338 { 339 int d; 340 struct sockaddr_storage a; 341 socklen_t alen; 342 int i, j, i2, j2; 343 char*** resif = NULL; 344 int* num_resif = NULL; 345 char portbuf[32]; 346 snprintf(portbuf, sizeof(portbuf), "%d", cfg->port); 347 348 if(cfg->num_ifs != 0) { 349 resif = (char***)calloc(cfg->num_ifs, sizeof(char**)); 350 if(!resif) fatal_exit("malloc failure"); 351 num_resif = (int*)calloc(cfg->num_ifs, sizeof(int)); 352 if(!num_resif) fatal_exit("malloc failure"); 353 } 354 for(i=0; i<cfg->num_ifs; i++) { 355 /* search for duplicates in IP or ifname arguments */ 356 for(i2=0; i2<i; i2++) { 357 if(strcmp(cfg->ifs[i], cfg->ifs[i2]) == 0) { 358 fatal_exit("interface: %s present twice, " 359 "cannot bind same ports twice.", 360 cfg->ifs[i]); 361 } 362 } 363 if(!resolve_interface_names(&cfg->ifs[i], 1, NULL, &resif[i], 364 &num_resif[i])) { 365 fatal_exit("could not resolve interface names, for %s", 366 cfg->ifs[i]); 367 } 368 /* check for port combinations that are not supported */ 369 if(if_is_pp2(resif[i][0], portbuf, cfg->proxy_protocol_port)) { 370 if(if_is_dnscrypt(resif[i][0], portbuf, 371 cfg->dnscrypt_port)) { 372 fatal_exit("PROXYv2 and DNSCrypt combination not " 373 "supported!"); 374 } else if(if_is_https(resif[i][0], portbuf, 375 cfg->https_port)) { 376 fatal_exit("PROXYv2 and DoH combination not " 377 "supported!"); 378 } 379 } 380 /* search for duplicates in the returned addresses */ 381 for(j=0; j<num_resif[i]; j++) { 382 if(!extstrtoaddr(resif[i][j], &a, &alen, cfg->port)) { 383 if(strcmp(cfg->ifs[i], resif[i][j]) != 0) 384 fatal_exit("cannot parse interface address '%s' from the interface specified as '%s'", 385 resif[i][j], cfg->ifs[i]); 386 else 387 fatal_exit("cannot parse interface specified as '%s'", 388 cfg->ifs[i]); 389 } 390 for(i2=0; i2<i; i2++) { 391 for(j2=0; j2<num_resif[i2]; j2++) { 392 if(strcmp(resif[i][j], resif[i2][j2]) 393 == 0) { 394 char info1[1024], info2[1024]; 395 if(strcmp(cfg->ifs[i], resif[i][j]) != 0) 396 snprintf(info1, sizeof(info1), "address %s from interface: %s", resif[i][j], cfg->ifs[i]); 397 else snprintf(info1, sizeof(info1), "interface: %s", cfg->ifs[i]); 398 if(strcmp(cfg->ifs[i2], resif[i2][j2]) != 0) 399 snprintf(info2, sizeof(info2), "address %s from interface: %s", resif[i2][j2], cfg->ifs[i2]); 400 else snprintf(info2, sizeof(info2), "interface: %s", cfg->ifs[i2]); 401 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); 402 } 403 } 404 } 405 } 406 } 407 408 for(i=0; i<cfg->num_ifs; i++) { 409 config_del_strarray(resif[i], num_resif[i]); 410 } 411 free(resif); 412 free(num_resif); 413 414 for(i=0; i<cfg->num_out_ifs; i++) { 415 if(!ipstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen) && 416 !netblockstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen, &d)) { 417 fatal_exit("cannot parse outgoing-interface " 418 "specified as '%s'", cfg->out_ifs[i]); 419 } 420 for(j=0; j<cfg->num_out_ifs; j++) { 421 if(i!=j && strcmp(cfg->out_ifs[i], cfg->out_ifs[j])==0) 422 fatal_exit("outgoing-interface: %s present " 423 "twice, cannot bind same ports twice.", 424 cfg->out_ifs[i]); 425 } 426 } 427 } 428 429 /** check interface-automatic-ports */ 430 static void 431 ifautomaticportschecks(char* ifautomaticports) 432 { 433 char* now = ifautomaticports; 434 while(now && *now) { 435 char* after; 436 int extraport; 437 while(isspace((unsigned char)*now)) 438 now++; 439 if(!*now) 440 break; 441 after = now; 442 extraport = (int)strtol(now, &after, 10); 443 if(extraport < 0 || extraport > 65535) 444 fatal_exit("interface-automatic-ports: port out of range at position %d in '%s'", (int)(now-ifautomaticports)+1, ifautomaticports); 445 if(extraport == 0 && now == after) 446 fatal_exit("interface-automatic-ports: parse error at position %d in '%s'", (int)(now-ifautomaticports)+1, ifautomaticports); 447 now = after; 448 } 449 } 450 451 /** check acl ips */ 452 static void 453 aclchecks(struct config_file* cfg) 454 { 455 int d; 456 struct sockaddr_storage a; 457 socklen_t alen; 458 struct config_str2list* acl; 459 for(acl=cfg->acls; acl; acl = acl->next) { 460 if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen, 461 &d)) { 462 fatal_exit("cannot parse access control address %s %s", 463 acl->str, acl->str2); 464 } 465 } 466 } 467 468 /** check tcp connection limit ips */ 469 static void 470 tcpconnlimitchecks(struct config_file* cfg) 471 { 472 int d; 473 struct sockaddr_storage a; 474 socklen_t alen; 475 struct config_str2list* tcl; 476 for(tcl=cfg->tcp_connection_limits; tcl; tcl = tcl->next) { 477 if(!netblockstrtoaddr(tcl->str, UNBOUND_DNS_PORT, &a, &alen, 478 &d)) { 479 fatal_exit("cannot parse tcp connection limit address %s %s", 480 tcl->str, tcl->str2); 481 } 482 } 483 } 484 485 /** true if fname is a file */ 486 static int 487 is_file(const char* fname) 488 { 489 struct stat buf; 490 if(stat(fname, &buf) < 0) { 491 if(errno==EACCES) { 492 printf("warning: no search permission for one of the directories in path: %s\n", fname); 493 return 1; 494 } 495 perror(fname); 496 return 0; 497 } 498 if(S_ISDIR(buf.st_mode)) { 499 printf("%s is not a file\n", fname); 500 return 0; 501 } 502 return 1; 503 } 504 505 /** true if fname is a directory */ 506 static int 507 is_dir(const char* fname) 508 { 509 struct stat buf; 510 if(stat(fname, &buf) < 0) { 511 if(errno==EACCES) { 512 printf("warning: no search permission for one of the directories in path: %s\n", fname); 513 return 1; 514 } 515 perror(fname); 516 return 0; 517 } 518 if(!(S_ISDIR(buf.st_mode))) { 519 printf("%s is not a directory\n", fname); 520 return 0; 521 } 522 return 1; 523 } 524 525 /** get base dir of a fname */ 526 static char* 527 basedir(char* fname) 528 { 529 char* rev; 530 if(!fname) fatal_exit("out of memory"); 531 rev = strrchr(fname, '/'); 532 if(!rev) return NULL; 533 if(fname == rev) return NULL; 534 rev[0] = 0; 535 return fname; 536 } 537 538 /** check chroot for a file string */ 539 static void 540 check_chroot_string(const char* desc, char** ss, 541 const char* chrootdir, struct config_file* cfg) 542 { 543 char* str = *ss; 544 if(str && str[0]) { 545 *ss = fname_after_chroot(str, cfg, 1); 546 if(!*ss) fatal_exit("out of memory"); 547 if(!is_file(*ss)) { 548 if(chrootdir && chrootdir[0]) 549 fatal_exit("%s: \"%s\" does not exist in " 550 "chrootdir %s", desc, str, chrootdir); 551 else 552 fatal_exit("%s: \"%s\" does not exist", 553 desc, str); 554 } 555 /* put in a new full path for continued checking */ 556 free(str); 557 } 558 } 559 560 /** check file list, every file must be inside the chroot location */ 561 static void 562 check_chroot_filelist(const char* desc, struct config_strlist* list, 563 const char* chrootdir, struct config_file* cfg) 564 { 565 struct config_strlist* p; 566 for(p=list; p; p=p->next) { 567 check_chroot_string(desc, &p->str, chrootdir, cfg); 568 } 569 } 570 571 /** check file list, with wildcard processing */ 572 static void 573 check_chroot_filelist_wild(const char* desc, struct config_strlist* list, 574 const char* chrootdir, struct config_file* cfg) 575 { 576 struct config_strlist* p; 577 for(p=list; p; p=p->next) { 578 #ifdef HAVE_GLOB 579 if(strchr(p->str, '*') || strchr(p->str, '[') || 580 strchr(p->str, '?') || strchr(p->str, '{') || 581 strchr(p->str, '~')) { 582 char* s = p->str; 583 /* adjust whole pattern for chroot and check later */ 584 p->str = fname_after_chroot(p->str, cfg, 1); 585 free(s); 586 } else 587 #endif /* HAVE_GLOB */ 588 check_chroot_string(desc, &p->str, chrootdir, cfg); 589 } 590 } 591 592 #ifdef CLIENT_SUBNET 593 /** check ECS configuration */ 594 static void 595 ecs_conf_checks(struct config_file* cfg) 596 { 597 struct ecs_whitelist* whitelist = NULL; 598 if(!(whitelist = ecs_whitelist_create())) 599 fatal_exit("Could not create ednssubnet whitelist: out of memory"); 600 if(!ecs_whitelist_apply_cfg(whitelist, cfg)) 601 fatal_exit("Could not setup ednssubnet whitelist"); 602 ecs_whitelist_delete(whitelist); 603 } 604 #endif /* CLIENT_SUBNET */ 605 606 /** check that the modules exist, are compiled in */ 607 static void 608 check_modules_exist(const char* module_conf) 609 { 610 const char** names = module_list_avail(); 611 const char* s = module_conf; 612 while(*s) { 613 int i = 0; 614 int is_ok = 0; 615 while(*s && isspace((unsigned char)*s)) 616 s++; 617 if(!*s) break; 618 while(names[i]) { 619 if(strncmp(names[i], s, strlen(names[i])) == 0) { 620 is_ok = 1; 621 break; 622 } 623 i++; 624 } 625 if(is_ok == 0) { 626 char n[64]; 627 size_t j; 628 n[0]=0; 629 n[sizeof(n)-1]=0; 630 for(j=0; j<sizeof(n)-1; j++) { 631 if(!s[j] || isspace((unsigned char)s[j])) { 632 n[j] = 0; 633 break; 634 } 635 n[j] = s[j]; 636 } 637 fatal_exit("module_conf lists module '%s' but that " 638 "module is not available.", n); 639 } 640 s += strlen(names[i]); 641 } 642 } 643 644 /** check configuration for errors */ 645 static void 646 morechecks(struct config_file* cfg) 647 { 648 warn_hosts("stub-host", cfg->stubs); 649 warn_hosts("forward-host", cfg->forwards); 650 interfacechecks(cfg); 651 ifautomaticportschecks(cfg->if_automatic_ports); 652 aclchecks(cfg); 653 tcpconnlimitchecks(cfg); 654 655 if(cfg->verbosity < 0) 656 fatal_exit("verbosity value < 0"); 657 if(cfg->num_threads <= 0 || cfg->num_threads > 10000) 658 fatal_exit("num_threads value weird"); 659 if(!cfg->do_ip4 && !cfg->do_ip6) 660 fatal_exit("ip4 and ip6 are both disabled, pointless"); 661 if(!cfg->do_ip4 && cfg->prefer_ip4) 662 fatal_exit("cannot prefer and disable ip4, pointless"); 663 if(!cfg->do_ip6 && cfg->prefer_ip6) 664 fatal_exit("cannot prefer and disable ip6, pointless"); 665 if(!cfg->do_udp && !cfg->do_tcp) 666 fatal_exit("udp and tcp are both disabled, pointless"); 667 if(cfg->edns_buffer_size > cfg->msg_buffer_size) 668 fatal_exit("edns-buffer-size larger than msg-buffer-size, " 669 "answers will not fit in processing buffer"); 670 #ifdef UB_ON_WINDOWS 671 w_config_adjust_directory(cfg); 672 #endif 673 if(cfg->chrootdir && cfg->chrootdir[0] && 674 cfg->chrootdir[strlen(cfg->chrootdir)-1] == '/') 675 fatal_exit("chootdir %s has trailing slash '/' please remove.", 676 cfg->chrootdir); 677 if(cfg->chrootdir && cfg->chrootdir[0] && 678 !is_dir(cfg->chrootdir)) { 679 fatal_exit("bad chroot directory"); 680 } 681 if(cfg->directory && cfg->directory[0]) { 682 char* ad = fname_after_chroot(cfg->directory, cfg, 0); 683 if(!ad) fatal_exit("out of memory"); 684 if(!is_dir(ad)) fatal_exit("bad chdir directory"); 685 free(ad); 686 } 687 if( (cfg->chrootdir && cfg->chrootdir[0]) || 688 (cfg->directory && cfg->directory[0])) { 689 if(cfg->pidfile && cfg->pidfile[0]) { 690 char* ad = (cfg->pidfile[0]=='/')?strdup(cfg->pidfile): 691 fname_after_chroot(cfg->pidfile, cfg, 1); 692 char* bd = basedir(ad); 693 if(bd && !is_dir(bd)) 694 fatal_exit("pidfile directory does not exist"); 695 free(ad); 696 } 697 if(cfg->logfile && cfg->logfile[0]) { 698 char* ad = fname_after_chroot(cfg->logfile, cfg, 1); 699 char* bd = basedir(ad); 700 if(bd && !is_dir(bd)) 701 fatal_exit("logfile directory does not exist"); 702 free(ad); 703 } 704 } 705 706 check_chroot_filelist("file with root-hints", 707 cfg->root_hints, cfg->chrootdir, cfg); 708 check_chroot_filelist("trust-anchor-file", 709 cfg->trust_anchor_file_list, cfg->chrootdir, cfg); 710 check_chroot_filelist("auto-trust-anchor-file", 711 cfg->auto_trust_anchor_file_list, cfg->chrootdir, cfg); 712 check_chroot_filelist_wild("trusted-keys-file", 713 cfg->trusted_keys_file_list, cfg->chrootdir, cfg); 714 if(cfg->disable_edns_do && strstr(cfg->module_conf, "validator") 715 && (cfg->trust_anchor_file_list 716 || cfg->trust_anchor_list 717 || cfg->auto_trust_anchor_file_list 718 || cfg->trusted_keys_file_list)) { 719 char* key = NULL; 720 if(cfg->auto_trust_anchor_file_list) 721 key = cfg->auto_trust_anchor_file_list->str; 722 if(!key && cfg->trust_anchor_file_list) 723 key = cfg->trust_anchor_file_list->str; 724 if(!key && cfg->trust_anchor_list) 725 key = cfg->trust_anchor_list->str; 726 if(!key && cfg->trusted_keys_file_list) 727 key = cfg->trusted_keys_file_list->str; 728 if(!key) key = ""; 729 fatal_exit("disable-edns-do does not allow DNSSEC to work, but the validator module uses a trust anchor %s, turn off disable-edns-do or disable validation", key); 730 } 731 #ifdef USE_IPSECMOD 732 if(cfg->ipsecmod_enabled && strstr(cfg->module_conf, "ipsecmod")) { 733 /* only check hook if enabled */ 734 check_chroot_string("ipsecmod-hook", &cfg->ipsecmod_hook, 735 cfg->chrootdir, cfg); 736 } 737 #endif 738 /* remove chroot setting so that modules are not stripping pathnames */ 739 free(cfg->chrootdir); 740 cfg->chrootdir = NULL; 741 742 /* check that the modules listed in module_conf exist */ 743 check_modules_exist(cfg->module_conf); 744 745 /* Respip is known to *not* work with dns64. */ 746 if(strcmp(cfg->module_conf, "iterator") != 0 747 && strcmp(cfg->module_conf, "validator iterator") != 0 748 && strcmp(cfg->module_conf, "dns64 validator iterator") != 0 749 && strcmp(cfg->module_conf, "dns64 iterator") != 0 750 && strcmp(cfg->module_conf, "respip iterator") != 0 751 && strcmp(cfg->module_conf, "respip validator iterator") != 0 752 && strcmp(cfg->module_conf, "respip dns64 validator iterator") != 0 753 && strcmp(cfg->module_conf, "respip dns64 iterator") != 0 754 #ifdef WITH_PYTHONMODULE 755 && strcmp(cfg->module_conf, "python iterator") != 0 756 && strcmp(cfg->module_conf, "python respip iterator") != 0 757 && strcmp(cfg->module_conf, "python validator iterator") != 0 758 && strcmp(cfg->module_conf, "python respip validator iterator") != 0 759 && strcmp(cfg->module_conf, "validator python iterator") != 0 760 && strcmp(cfg->module_conf, "dns64 python iterator") != 0 761 && strcmp(cfg->module_conf, "dns64 python validator iterator") != 0 762 && strcmp(cfg->module_conf, "dns64 validator python iterator") != 0 763 && strcmp(cfg->module_conf, "python dns64 iterator") != 0 764 && strcmp(cfg->module_conf, "python dns64 validator iterator") != 0 765 #endif 766 #ifdef WITH_DYNLIBMODULE 767 && strcmp(cfg->module_conf, "dynlib iterator") != 0 768 && strcmp(cfg->module_conf, "dynlib dynlib iterator") != 0 769 && strcmp(cfg->module_conf, "dynlib dynlib dynlib iterator") != 0 770 && strcmp(cfg->module_conf, "python dynlib iterator") != 0 771 && strcmp(cfg->module_conf, "python dynlib dynlib iterator") != 0 772 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib iterator") != 0 773 && strcmp(cfg->module_conf, "dynlib respip iterator") != 0 774 && strcmp(cfg->module_conf, "dynlib validator iterator") != 0 775 && strcmp(cfg->module_conf, "dynlib dynlib validator iterator") != 0 776 && strcmp(cfg->module_conf, "dynlib dynlib dynlib validator iterator") != 0 777 && strcmp(cfg->module_conf, "python dynlib validator iterator") != 0 778 && strcmp(cfg->module_conf, "python dynlib dynlib validator iterator") != 0 779 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib validator iterator") != 0 780 && strcmp(cfg->module_conf, "dynlib respip validator iterator") != 0 781 && strcmp(cfg->module_conf, "validator dynlib iterator") != 0 782 && strcmp(cfg->module_conf, "dns64 dynlib iterator") != 0 783 && strcmp(cfg->module_conf, "dns64 dynlib validator iterator") != 0 784 && strcmp(cfg->module_conf, "dns64 validator dynlib iterator") != 0 785 && strcmp(cfg->module_conf, "dynlib dns64 iterator") != 0 786 && strcmp(cfg->module_conf, "dynlib dns64 validator iterator") != 0 787 && strcmp(cfg->module_conf, "dynlib dns64 cachedb iterator") != 0 788 && strcmp(cfg->module_conf, "dynlib dns64 validator cachedb iterator") != 0 789 && strcmp(cfg->module_conf, "dns64 dynlib cachedb iterator") != 0 790 && strcmp(cfg->module_conf, "dns64 dynlib validator cachedb iterator") != 0 791 && strcmp(cfg->module_conf, "dynlib cachedb iterator") != 0 792 && strcmp(cfg->module_conf, "dynlib respip cachedb iterator") != 0 793 && strcmp(cfg->module_conf, "dynlib validator cachedb iterator") != 0 794 && strcmp(cfg->module_conf, "dynlib respip validator cachedb iterator") != 0 795 && strcmp(cfg->module_conf, "cachedb dynlib iterator") != 0 796 && strcmp(cfg->module_conf, "respip cachedb dynlib iterator") != 0 797 && strcmp(cfg->module_conf, "validator cachedb dynlib iterator") != 0 798 && strcmp(cfg->module_conf, "respip validator cachedb dynlib iterator") != 0 799 && strcmp(cfg->module_conf, "validator dynlib cachedb iterator") != 0 800 && strcmp(cfg->module_conf, "respip validator dynlib cachedb iterator") != 0 801 && strcmp(cfg->module_conf, "dynlib subnetcache iterator") != 0 802 && strcmp(cfg->module_conf, "dynlib respip subnetcache iterator") != 0 803 && strcmp(cfg->module_conf, "subnetcache dynlib iterator") != 0 804 && strcmp(cfg->module_conf, "respip subnetcache dynlib iterator") != 0 805 && strcmp(cfg->module_conf, "dynlib subnetcache validator iterator") != 0 806 && strcmp(cfg->module_conf, "dynlib respip subnetcache validator iterator") != 0 807 && strcmp(cfg->module_conf, "subnetcache dynlib validator iterator") != 0 808 && strcmp(cfg->module_conf, "respip subnetcache dynlib validator iterator") != 0 809 && strcmp(cfg->module_conf, "subnetcache validator dynlib iterator") != 0 810 && strcmp(cfg->module_conf, "respip subnetcache validator dynlib iterator") != 0 811 && strcmp(cfg->module_conf, "dynlib ipsecmod iterator") != 0 812 && strcmp(cfg->module_conf, "dynlib ipsecmod respip iterator") != 0 813 && strcmp(cfg->module_conf, "ipsecmod dynlib iterator") != 0 814 && strcmp(cfg->module_conf, "ipsecmod dynlib respip iterator") != 0 815 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 816 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 817 && strcmp(cfg->module_conf, "dynlib ipsecmod validator iterator") != 0 818 && strcmp(cfg->module_conf, "dynlib ipsecmod respip validator iterator") != 0 819 && strcmp(cfg->module_conf, "ipsecmod dynlib validator iterator") != 0 820 && strcmp(cfg->module_conf, "ipsecmod dynlib respip validator iterator") != 0 821 && strcmp(cfg->module_conf, "ipsecmod validator dynlib iterator") != 0 822 && strcmp(cfg->module_conf, "ipsecmod respip validator dynlib iterator") != 0 823 #endif 824 #ifdef USE_CACHEDB 825 && strcmp(cfg->module_conf, "validator cachedb iterator") != 0 826 && strcmp(cfg->module_conf, "respip validator cachedb iterator") != 0 827 && strcmp(cfg->module_conf, "cachedb iterator") != 0 828 && strcmp(cfg->module_conf, "respip cachedb iterator") != 0 829 && strcmp(cfg->module_conf, "dns64 validator cachedb iterator") != 0 830 && strcmp(cfg->module_conf, "dns64 cachedb iterator") != 0 831 #endif 832 #if defined(WITH_PYTHONMODULE) && defined(USE_CACHEDB) 833 && strcmp(cfg->module_conf, "python dns64 cachedb iterator") != 0 834 && strcmp(cfg->module_conf, "python dns64 validator cachedb iterator") != 0 835 && strcmp(cfg->module_conf, "dns64 python cachedb iterator") != 0 836 && strcmp(cfg->module_conf, "dns64 python validator cachedb iterator") != 0 837 && strcmp(cfg->module_conf, "python cachedb iterator") != 0 838 && strcmp(cfg->module_conf, "python respip cachedb iterator") != 0 839 && strcmp(cfg->module_conf, "python validator cachedb iterator") != 0 840 && strcmp(cfg->module_conf, "python respip validator cachedb iterator") != 0 841 && strcmp(cfg->module_conf, "cachedb python iterator") != 0 842 && strcmp(cfg->module_conf, "respip cachedb python iterator") != 0 843 && strcmp(cfg->module_conf, "validator cachedb python iterator") != 0 844 && strcmp(cfg->module_conf, "respip validator cachedb python iterator") != 0 845 && strcmp(cfg->module_conf, "validator python cachedb iterator") != 0 846 && strcmp(cfg->module_conf, "respip validator python cachedb iterator") != 0 847 #endif 848 #if defined(CLIENT_SUBNET) && defined(USE_CACHEDB) 849 && strcmp(cfg->module_conf, "respip subnetcache validator cachedb iterator") != 0 850 && strcmp(cfg->module_conf, "subnetcache validator cachedb iterator") != 0 851 #endif 852 #ifdef CLIENT_SUBNET 853 && strcmp(cfg->module_conf, "subnetcache iterator") != 0 854 && strcmp(cfg->module_conf, "respip subnetcache iterator") != 0 855 && strcmp(cfg->module_conf, "subnetcache validator iterator") != 0 856 && strcmp(cfg->module_conf, "respip subnetcache validator iterator") != 0 857 && strcmp(cfg->module_conf, "dns64 subnetcache iterator") != 0 858 && strcmp(cfg->module_conf, "dns64 subnetcache validator iterator") != 0 859 && strcmp(cfg->module_conf, "dns64 subnetcache respip iterator") != 0 860 && strcmp(cfg->module_conf, "dns64 subnetcache respip validator iterator") != 0 861 #endif 862 #if defined(WITH_PYTHONMODULE) && defined(CLIENT_SUBNET) 863 && strcmp(cfg->module_conf, "python subnetcache iterator") != 0 864 && strcmp(cfg->module_conf, "python respip subnetcache iterator") != 0 865 && strcmp(cfg->module_conf, "subnetcache python iterator") != 0 866 && strcmp(cfg->module_conf, "respip subnetcache python iterator") != 0 867 && strcmp(cfg->module_conf, "python subnetcache validator iterator") != 0 868 && strcmp(cfg->module_conf, "python respip subnetcache validator iterator") != 0 869 && strcmp(cfg->module_conf, "subnetcache python validator iterator") != 0 870 && strcmp(cfg->module_conf, "respip subnetcache python validator iterator") != 0 871 && strcmp(cfg->module_conf, "subnetcache validator python iterator") != 0 872 && strcmp(cfg->module_conf, "respip subnetcache validator python iterator") != 0 873 #endif 874 #ifdef USE_IPSECMOD 875 && strcmp(cfg->module_conf, "ipsecmod iterator") != 0 876 && strcmp(cfg->module_conf, "ipsecmod respip iterator") != 0 877 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 878 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 879 #endif 880 #if defined(WITH_PYTHONMODULE) && defined(USE_IPSECMOD) 881 && strcmp(cfg->module_conf, "python ipsecmod iterator") != 0 882 && strcmp(cfg->module_conf, "python ipsecmod respip iterator") != 0 883 && strcmp(cfg->module_conf, "ipsecmod python iterator") != 0 884 && strcmp(cfg->module_conf, "ipsecmod python respip iterator") != 0 885 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 886 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 887 && strcmp(cfg->module_conf, "python ipsecmod validator iterator") != 0 888 && strcmp(cfg->module_conf, "python ipsecmod respip validator iterator") != 0 889 && strcmp(cfg->module_conf, "ipsecmod python validator iterator") != 0 890 && strcmp(cfg->module_conf, "ipsecmod python respip validator iterator") != 0 891 && strcmp(cfg->module_conf, "ipsecmod validator python iterator") != 0 892 && strcmp(cfg->module_conf, "ipsecmod respip validator python iterator") != 0 893 #endif 894 #ifdef USE_IPSET 895 && strcmp(cfg->module_conf, "validator ipset iterator") != 0 896 && strcmp(cfg->module_conf, "validator ipset respip iterator") != 0 897 && strcmp(cfg->module_conf, "ipset iterator") != 0 898 && strcmp(cfg->module_conf, "ipset respip iterator") != 0 899 #endif 900 ) { 901 fatal_exit("module conf '%s' is not known to work", 902 cfg->module_conf); 903 } 904 905 #ifdef HAVE_GETPWNAM 906 if(cfg->username && cfg->username[0]) { 907 if(getpwnam(cfg->username) == NULL) 908 fatal_exit("user '%s' does not exist.", cfg->username); 909 # ifdef HAVE_ENDPWENT 910 endpwent(); 911 # endif 912 } 913 #endif 914 if(cfg->remote_control_enable && options_remote_is_address(cfg) 915 && cfg->control_use_cert) { 916 check_chroot_string("server-key-file", &cfg->server_key_file, 917 cfg->chrootdir, cfg); 918 check_chroot_string("server-cert-file", &cfg->server_cert_file, 919 cfg->chrootdir, cfg); 920 if(!is_file(cfg->control_key_file)) 921 fatal_exit("control-key-file: \"%s\" does not exist", 922 cfg->control_key_file); 923 if(!is_file(cfg->control_cert_file)) 924 fatal_exit("control-cert-file: \"%s\" does not exist", 925 cfg->control_cert_file); 926 } 927 928 donotquerylocalhostcheck(cfg); 929 localzonechecks(cfg); 930 view_and_respipchecks(cfg); 931 #ifdef CLIENT_SUBNET 932 ecs_conf_checks(cfg); 933 #endif 934 } 935 936 /** check forwards */ 937 static void 938 check_fwd(struct config_file* cfg) 939 { 940 struct iter_forwards* fwd = forwards_create(); 941 if(!fwd || !forwards_apply_cfg(fwd, cfg)) { 942 fatal_exit("Could not set forward zones"); 943 } 944 forwards_delete(fwd); 945 } 946 947 /** check hints */ 948 static void 949 check_hints(struct config_file* cfg) 950 { 951 struct iter_hints* hints = hints_create(); 952 if(!hints || !hints_apply_cfg(hints, cfg)) { 953 fatal_exit("Could not set root or stub hints"); 954 } 955 hints_delete(hints); 956 } 957 958 /** check auth zones */ 959 static void 960 check_auth(struct config_file* cfg) 961 { 962 int is_rpz = 0; 963 struct auth_zones* az = auth_zones_create(); 964 if(!az || !auth_zones_apply_cfg(az, cfg, 0, &is_rpz, NULL, NULL)) { 965 fatal_exit("Could not setup authority zones"); 966 } 967 auth_zones_delete(az); 968 } 969 970 /** check config file */ 971 static void 972 checkconf(const char* cfgfile, const char* opt, int final, int quiet) 973 { 974 char oldwd[4096]; 975 struct config_file* cfg = config_create(); 976 if(!cfg) 977 fatal_exit("out of memory"); 978 oldwd[0] = 0; 979 if(!getcwd(oldwd, sizeof(oldwd))) { 980 log_err("cannot getcwd: %s", strerror(errno)); 981 oldwd[0] = 0; 982 } 983 if(!config_read(cfg, cfgfile, NULL)) { 984 /* config_read prints messages to stderr */ 985 config_delete(cfg); 986 exit(1); 987 } 988 if(oldwd[0] && chdir(oldwd) == -1) 989 log_err("cannot chdir(%s): %s", oldwd, strerror(errno)); 990 if(opt) { 991 print_option(cfg, opt, final); 992 config_delete(cfg); 993 return; 994 } 995 morechecks(cfg); 996 check_mod(cfg, iter_get_funcblock()); 997 check_mod(cfg, val_get_funcblock()); 998 #ifdef WITH_PYTHONMODULE 999 if(strstr(cfg->module_conf, "python")) 1000 check_mod(cfg, pythonmod_get_funcblock()); 1001 #endif 1002 check_fwd(cfg); 1003 check_hints(cfg); 1004 check_auth(cfg); 1005 if(!quiet) { printf("unbound-checkconf: no errors in %s\n", cfgfile); } 1006 config_delete(cfg); 1007 } 1008 1009 /** getopt global, in case header files fail to declare it. */ 1010 extern int optind; 1011 /** getopt global, in case header files fail to declare it. */ 1012 extern char* optarg; 1013 1014 /** Main routine for checkconf */ 1015 int main(int argc, char* argv[]) 1016 { 1017 int c; 1018 int final = 0; 1019 int quiet = 0; 1020 const char* f; 1021 const char* opt = NULL; 1022 const char* cfgfile = CONFIGFILE; 1023 checklock_start(); 1024 log_ident_set("unbound-checkconf"); 1025 log_init(NULL, 0, NULL); 1026 #ifdef USE_WINSOCK 1027 /* use registry config file in preference to compiletime location */ 1028 if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile"))) 1029 cfgfile = CONFIGFILE; 1030 #endif /* USE_WINSOCK */ 1031 /* parse the options */ 1032 while( (c=getopt(argc, argv, "fhqo:")) != -1) { 1033 switch(c) { 1034 case 'f': 1035 final = 1; 1036 break; 1037 case 'o': 1038 opt = optarg; 1039 break; 1040 case 'q': 1041 quiet = 1; 1042 break; 1043 case '?': 1044 case 'h': 1045 default: 1046 usage(); 1047 } 1048 } 1049 argc -= optind; 1050 argv += optind; 1051 if(argc != 0 && argc != 1) 1052 usage(); 1053 if(argc == 1) 1054 f = argv[0]; 1055 else f = cfgfile; 1056 checkconf(f, opt, final, quiet); 1057 checklock_stop(); 1058 return 0; 1059 } 1060