1 /* 2 * smallapp/unbound-checkconf.c - config file checker for unbound.conf file. 3 * 4 * Copyright (c) 2007, NLnet Labs. All rights reserved. 5 * 6 * This software is open source. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * Redistributions of source code must retain the above copyright notice, 13 * this list of conditions and the following disclaimer. 14 * 15 * Redistributions in binary form must reproduce the above copyright notice, 16 * this list of conditions and the following disclaimer in the documentation 17 * and/or other materials provided with the distribution. 18 * 19 * Neither the name of the NLNET LABS nor the names of its contributors may 20 * be used to endorse or promote products derived from this software without 21 * specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /** 37 * \file 38 * 39 * The config checker checks for syntax and other errors in the unbound.conf 40 * file, and can be used to check for errors before the server is started 41 * or sigHUPped. 42 * Exit status 1 means an error. 43 */ 44 45 #include "config.h" 46 #include <ctype.h> 47 #include "util/log.h" 48 #include "util/config_file.h" 49 #include "util/module.h" 50 #include "util/net_help.h" 51 #include "util/regional.h" 52 #include "iterator/iterator.h" 53 #include "iterator/iter_fwd.h" 54 #include "iterator/iter_hints.h" 55 #include "validator/validator.h" 56 #include "services/localzone.h" 57 #include "services/listen_dnsport.h" 58 #include "services/view.h" 59 #include "services/authzone.h" 60 #include "respip/respip.h" 61 #include "sldns/sbuffer.h" 62 #include "sldns/str2wire.h" 63 #ifdef HAVE_GETOPT_H 64 #include <getopt.h> 65 #endif 66 #ifdef HAVE_PWD_H 67 #include <pwd.h> 68 #endif 69 #ifdef HAVE_SYS_STAT_H 70 #include <sys/stat.h> 71 #endif 72 #ifdef HAVE_GLOB_H 73 #include <glob.h> 74 #endif 75 #ifdef WITH_PYTHONMODULE 76 #include "pythonmod/pythonmod.h" 77 #endif 78 #ifdef CLIENT_SUBNET 79 #include "edns-subnet/subnet-whitelist.h" 80 #endif 81 82 /** Give checkconf usage, and exit (1). */ 83 static void 84 usage(void) 85 { 86 printf("Usage: local-unbound-checkconf [file]\n"); 87 printf(" Checks unbound configuration file for errors.\n"); 88 printf("file if omitted %s is used.\n", CONFIGFILE); 89 printf("-o option print value of option to stdout.\n"); 90 printf("-f output full pathname with chroot applied, eg. with -o pidfile.\n"); 91 printf("-h show this usage help.\n"); 92 printf("Version %s\n", PACKAGE_VERSION); 93 printf("BSD licensed, see LICENSE in source package for details.\n"); 94 printf("Report bugs to %s\n", PACKAGE_BUGREPORT); 95 exit(1); 96 } 97 98 /** 99 * Print given option to stdout 100 * @param cfg: config 101 * @param opt: option name without trailing :. 102 * This is different from config_set_option. 103 * @param final: if final pathname with chroot applied has to be printed. 104 */ 105 static void 106 print_option(struct config_file* cfg, const char* opt, int final) 107 { 108 if(strcmp(opt, "pidfile") == 0 && final) { 109 char *p = fname_after_chroot(cfg->pidfile, cfg, 1); 110 if(!p) fatal_exit("out of memory"); 111 printf("%s\n", p); 112 free(p); 113 return; 114 } 115 if(strcmp(opt, "auto-trust-anchor-file") == 0 && final) { 116 struct config_strlist* s = cfg->auto_trust_anchor_file_list; 117 for(; s; s=s->next) { 118 char *p = fname_after_chroot(s->str, cfg, 1); 119 if(!p) fatal_exit("out of memory"); 120 printf("%s\n", p); 121 free(p); 122 } 123 return; 124 } 125 if(!config_get_option(cfg, opt, config_print_func, stdout)) 126 fatal_exit("cannot print option '%s'", opt); 127 } 128 129 /** check if module works with config */ 130 static void 131 check_mod(struct config_file* cfg, struct module_func_block* fb) 132 { 133 struct module_env env; 134 memset(&env, 0, sizeof(env)); 135 env.cfg = cfg; 136 env.scratch = regional_create(); 137 env.scratch_buffer = sldns_buffer_new(BUFSIZ); 138 if(!env.scratch || !env.scratch_buffer) 139 fatal_exit("out of memory"); 140 if(!edns_known_options_init(&env)) 141 fatal_exit("out of memory"); 142 if(!(*fb->init)(&env, 0)) { 143 fatal_exit("bad config for %s module", fb->name); 144 } 145 (*fb->deinit)(&env, 0); 146 sldns_buffer_free(env.scratch_buffer); 147 regional_destroy(env.scratch); 148 edns_known_options_delete(&env); 149 } 150 151 /** true if addr is a localhost address, 127.0.0.1 or ::1 (with maybe "@port" 152 * after it) */ 153 static int 154 str_addr_is_localhost(const char* a) 155 { 156 if(strncmp(a, "127.", 4) == 0) return 1; 157 if(strncmp(a, "::1", 3) == 0) return 1; 158 return 0; 159 } 160 161 /** check do-not-query-localhost */ 162 static void 163 donotquerylocalhostcheck(struct config_file* cfg) 164 { 165 if(cfg->donotquery_localhost) { 166 struct config_stub* p; 167 struct config_strlist* s; 168 for(p=cfg->forwards; p; p=p->next) { 169 for(s=p->addrs; s; s=s->next) { 170 if(str_addr_is_localhost(s->str)) { 171 fprintf(stderr, "unbound-checkconf: warning: forward-addr: '%s' is specified for forward-zone: '%s', but do-not-query-localhost: yes means that the address will not be used for lookups.\n", 172 s->str, p->name); 173 } 174 } 175 } 176 for(p=cfg->stubs; p; p=p->next) { 177 for(s=p->addrs; s; s=s->next) { 178 if(str_addr_is_localhost(s->str)) { 179 fprintf(stderr, "unbound-checkconf: warning: stub-addr: '%s' is specified for stub-zone: '%s', but do-not-query-localhost: yes means that the address will not be used for lookups.\n", 180 s->str, p->name); 181 } 182 } 183 } 184 } 185 } 186 187 /** check localzones */ 188 static void 189 localzonechecks(struct config_file* cfg) 190 { 191 struct local_zones* zs; 192 if(!(zs = local_zones_create())) 193 fatal_exit("out of memory"); 194 if(!local_zones_apply_cfg(zs, cfg)) 195 fatal_exit("failed local-zone, local-data configuration"); 196 local_zones_delete(zs); 197 } 198 199 /** checks for acl and views */ 200 static void 201 acl_view_tag_checks(struct config_file* cfg, struct views* views) 202 { 203 int d; 204 struct sockaddr_storage a; 205 socklen_t alen; 206 struct config_str2list* acl; 207 struct config_str3list* s3; 208 struct config_strbytelist* sb; 209 210 /* acl_view */ 211 for(acl=cfg->acl_view; acl; acl = acl->next) { 212 struct view* v; 213 if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen, 214 &d)) { 215 fatal_exit("cannot parse access-control-view " 216 "address %s %s", acl->str, acl->str2); 217 } 218 v = views_find_view(views, acl->str2, 0); 219 if(!v) { 220 fatal_exit("cannot find view for " 221 "access-control-view: %s %s", 222 acl->str, acl->str2); 223 } 224 lock_rw_unlock(&v->lock); 225 } 226 227 /* acl_tags */ 228 for(sb=cfg->acl_tags; sb; sb = sb->next) { 229 if(!netblockstrtoaddr(sb->str, UNBOUND_DNS_PORT, &a, &alen, 230 &d)) { 231 fatal_exit("cannot parse access-control-tags " 232 "address %s", sb->str); 233 } 234 } 235 236 /* acl_tag_actions */ 237 for(s3=cfg->acl_tag_actions; s3; s3 = s3->next) { 238 enum localzone_type t; 239 if(!netblockstrtoaddr(s3->str, UNBOUND_DNS_PORT, &a, &alen, 240 &d)) { 241 fatal_exit("cannot parse access-control-tag-actions " 242 "address %s %s %s", 243 s3->str, s3->str2, s3->str3); 244 } 245 if(find_tag_id(cfg, s3->str2) == -1) { 246 fatal_exit("cannot parse tag %s (define-tag it), " 247 "for access-control-tag-actions: %s %s %s", 248 s3->str2, s3->str, s3->str2, s3->str3); 249 } 250 if(!local_zone_str2type(s3->str3, &t)) { 251 fatal_exit("cannot parse access control action type %s" 252 " for access-control-tag-actions: %s %s %s", 253 s3->str3, s3->str, s3->str2, s3->str3); 254 } 255 } 256 257 /* acl_tag_datas */ 258 for(s3=cfg->acl_tag_datas; s3; s3 = s3->next) { 259 char buf[65536]; 260 uint8_t rr[LDNS_RR_BUF_SIZE]; 261 size_t len = sizeof(rr); 262 int res; 263 if(!netblockstrtoaddr(s3->str, UNBOUND_DNS_PORT, &a, &alen, 264 &d)) { 265 fatal_exit("cannot parse access-control-tag-datas address %s %s '%s'", 266 s3->str, s3->str2, s3->str3); 267 } 268 if(find_tag_id(cfg, s3->str2) == -1) { 269 fatal_exit("cannot parse tag %s (define-tag it), " 270 "for access-control-tag-datas: %s %s '%s'", 271 s3->str2, s3->str, s3->str2, s3->str3); 272 } 273 /* '.' is sufficient for validation, and it makes the call to 274 * sldns_wirerr_get_type() simpler below. */ 275 snprintf(buf, sizeof(buf), "%s %s", ".", s3->str3); 276 res = sldns_str2wire_rr_buf(buf, rr, &len, NULL, 3600, NULL, 277 0, NULL, 0); 278 if(res != 0) { 279 fatal_exit("cannot parse rr data [char %d] parse error %s, for access-control-tag-datas: %s %s '%s'", 280 (int)LDNS_WIREPARSE_OFFSET(res)-2, 281 sldns_get_errorstr_parse(res), 282 s3->str, s3->str2, s3->str3); 283 } 284 } 285 } 286 287 /** check view and response-ip configuration */ 288 static void 289 view_and_respipchecks(struct config_file* cfg) 290 { 291 struct views* views = NULL; 292 struct respip_set* respip = NULL; 293 int ignored = 0; 294 if(!(views = views_create())) 295 fatal_exit("Could not create views: out of memory"); 296 if(!(respip = respip_set_create())) 297 fatal_exit("Could not create respip set: out of memory"); 298 if(!views_apply_cfg(views, cfg)) 299 fatal_exit("Could not set up views"); 300 if(!respip_global_apply_cfg(respip, cfg)) 301 fatal_exit("Could not setup respip set"); 302 if(!respip_views_apply_cfg(views, cfg, &ignored)) 303 fatal_exit("Could not setup per-view respip sets"); 304 acl_view_tag_checks(cfg, views); 305 views_delete(views); 306 respip_set_delete(respip); 307 } 308 309 /** emit warnings for IP in hosts */ 310 static void 311 warn_hosts(const char* typ, struct config_stub* list) 312 { 313 struct sockaddr_storage a; 314 socklen_t alen; 315 struct config_stub* s; 316 struct config_strlist* h; 317 for(s=list; s; s=s->next) { 318 for(h=s->hosts; h; h=h->next) { 319 if(extstrtoaddr(h->str, &a, &alen, UNBOUND_DNS_PORT)) { 320 fprintf(stderr, "unbound-checkconf: warning:" 321 " %s %s: \"%s\" is an IP%s address, " 322 "and when looked up as a host name " 323 "during use may not resolve.\n", 324 s->name, typ, h->str, 325 addr_is_ip6(&a, alen)?"6":"4"); 326 } 327 } 328 } 329 } 330 331 /** check interface strings */ 332 static void 333 interfacechecks(struct config_file* cfg) 334 { 335 int d; 336 struct sockaddr_storage a; 337 socklen_t alen; 338 int i, j, i2, j2; 339 char*** resif = NULL; 340 int* num_resif = NULL; 341 char portbuf[32]; 342 snprintf(portbuf, sizeof(portbuf), "%d", cfg->port); 343 344 if(cfg->num_ifs != 0) { 345 resif = (char***)calloc(cfg->num_ifs, sizeof(char**)); 346 if(!resif) fatal_exit("malloc failure"); 347 num_resif = (int*)calloc(cfg->num_ifs, sizeof(int)); 348 if(!num_resif) fatal_exit("malloc failure"); 349 } 350 for(i=0; i<cfg->num_ifs; i++) { 351 /* search for duplicates in IP or ifname arguments */ 352 for(i2=0; i2<i; i2++) { 353 if(strcmp(cfg->ifs[i], cfg->ifs[i2]) == 0) { 354 fatal_exit("interface: %s present twice, " 355 "cannot bind same ports twice.", 356 cfg->ifs[i]); 357 } 358 } 359 if(!resolve_interface_names(&cfg->ifs[i], 1, NULL, &resif[i], 360 &num_resif[i])) { 361 fatal_exit("could not resolve interface names, for %s", 362 cfg->ifs[i]); 363 } 364 /* check for port combinations that are not supported */ 365 if(if_is_pp2(resif[i][0], portbuf, cfg->proxy_protocol_port)) { 366 if(if_is_dnscrypt(resif[i][0], portbuf, 367 cfg->dnscrypt_port)) { 368 fatal_exit("PROXYv2 and DNSCrypt combination not " 369 "supported!"); 370 } else if(if_is_https(resif[i][0], portbuf, 371 cfg->https_port)) { 372 fatal_exit("PROXYv2 and DoH combination not " 373 "supported!"); 374 } 375 } 376 /* search for duplicates in the returned addresses */ 377 for(j=0; j<num_resif[i]; j++) { 378 if(!extstrtoaddr(resif[i][j], &a, &alen, cfg->port)) { 379 if(strcmp(cfg->ifs[i], resif[i][j]) != 0) 380 fatal_exit("cannot parse interface address '%s' from the interface specified as '%s'", 381 resif[i][j], cfg->ifs[i]); 382 else 383 fatal_exit("cannot parse interface specified as '%s'", 384 cfg->ifs[i]); 385 } 386 for(i2=0; i2<i; i2++) { 387 for(j2=0; j2<num_resif[i2]; j2++) { 388 if(strcmp(resif[i][j], resif[i2][j2]) 389 == 0) { 390 char info1[1024], info2[1024]; 391 if(strcmp(cfg->ifs[i], resif[i][j]) != 0) 392 snprintf(info1, sizeof(info1), "address %s from interface: %s", resif[i][j], cfg->ifs[i]); 393 else snprintf(info1, sizeof(info1), "interface: %s", cfg->ifs[i]); 394 if(strcmp(cfg->ifs[i2], resif[i2][j2]) != 0) 395 snprintf(info2, sizeof(info2), "address %s from interface: %s", resif[i2][j2], cfg->ifs[i2]); 396 else snprintf(info2, sizeof(info2), "interface: %s", cfg->ifs[i2]); 397 fatal_exit("%s present twice, cannot bind the same ports twice. The first entry is %s and the second is %s", resif[i][j], info2, info1); 398 } 399 } 400 } 401 } 402 } 403 404 for(i=0; i<cfg->num_ifs; i++) { 405 config_del_strarray(resif[i], num_resif[i]); 406 } 407 free(resif); 408 free(num_resif); 409 410 for(i=0; i<cfg->num_out_ifs; i++) { 411 if(!ipstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen) && 412 !netblockstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen, &d)) { 413 fatal_exit("cannot parse outgoing-interface " 414 "specified as '%s'", cfg->out_ifs[i]); 415 } 416 for(j=0; j<cfg->num_out_ifs; j++) { 417 if(i!=j && strcmp(cfg->out_ifs[i], cfg->out_ifs[j])==0) 418 fatal_exit("outgoing-interface: %s present " 419 "twice, cannot bind same ports twice.", 420 cfg->out_ifs[i]); 421 } 422 } 423 } 424 425 /** check interface-automatic-ports */ 426 static void 427 ifautomaticportschecks(char* ifautomaticports) 428 { 429 char* now = ifautomaticports; 430 while(now && *now) { 431 char* after; 432 int extraport; 433 while(isspace((unsigned char)*now)) 434 now++; 435 if(!*now) 436 break; 437 after = now; 438 extraport = (int)strtol(now, &after, 10); 439 if(extraport < 0 || extraport > 65535) 440 fatal_exit("interface-automatic-ports: port out of range at position %d in '%s'", (int)(now-ifautomaticports)+1, ifautomaticports); 441 if(extraport == 0 && now == after) 442 fatal_exit("interface-automatic-ports: parse error at position %d in '%s'", (int)(now-ifautomaticports)+1, ifautomaticports); 443 now = after; 444 } 445 } 446 447 /** check acl ips */ 448 static void 449 aclchecks(struct config_file* cfg) 450 { 451 int d; 452 struct sockaddr_storage a; 453 socklen_t alen; 454 struct config_str2list* acl; 455 for(acl=cfg->acls; acl; acl = acl->next) { 456 if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen, 457 &d)) { 458 fatal_exit("cannot parse access control address %s %s", 459 acl->str, acl->str2); 460 } 461 } 462 } 463 464 /** check tcp connection limit ips */ 465 static void 466 tcpconnlimitchecks(struct config_file* cfg) 467 { 468 int d; 469 struct sockaddr_storage a; 470 socklen_t alen; 471 struct config_str2list* tcl; 472 for(tcl=cfg->tcp_connection_limits; tcl; tcl = tcl->next) { 473 if(!netblockstrtoaddr(tcl->str, UNBOUND_DNS_PORT, &a, &alen, 474 &d)) { 475 fatal_exit("cannot parse tcp connection limit address %s %s", 476 tcl->str, tcl->str2); 477 } 478 } 479 } 480 481 /** true if fname is a file */ 482 static int 483 is_file(const char* fname) 484 { 485 struct stat buf; 486 if(stat(fname, &buf) < 0) { 487 if(errno==EACCES) { 488 printf("warning: no search permission for one of the directories in path: %s\n", fname); 489 return 1; 490 } 491 perror(fname); 492 return 0; 493 } 494 if(S_ISDIR(buf.st_mode)) { 495 printf("%s is not a file\n", fname); 496 return 0; 497 } 498 return 1; 499 } 500 501 /** true if fname is a directory */ 502 static int 503 is_dir(const char* fname) 504 { 505 struct stat buf; 506 if(stat(fname, &buf) < 0) { 507 if(errno==EACCES) { 508 printf("warning: no search permission for one of the directories in path: %s\n", fname); 509 return 1; 510 } 511 perror(fname); 512 return 0; 513 } 514 if(!(S_ISDIR(buf.st_mode))) { 515 printf("%s is not a directory\n", fname); 516 return 0; 517 } 518 return 1; 519 } 520 521 /** get base dir of a fname */ 522 static char* 523 basedir(char* fname) 524 { 525 char* rev; 526 if(!fname) fatal_exit("out of memory"); 527 rev = strrchr(fname, '/'); 528 if(!rev) return NULL; 529 if(fname == rev) return NULL; 530 rev[0] = 0; 531 return fname; 532 } 533 534 /** check chroot for a file string */ 535 static void 536 check_chroot_string(const char* desc, char** ss, 537 const char* chrootdir, struct config_file* cfg) 538 { 539 char* str = *ss; 540 if(str && str[0]) { 541 *ss = fname_after_chroot(str, cfg, 1); 542 if(!*ss) fatal_exit("out of memory"); 543 if(!is_file(*ss)) { 544 if(chrootdir && chrootdir[0]) 545 fatal_exit("%s: \"%s\" does not exist in " 546 "chrootdir %s", desc, str, chrootdir); 547 else 548 fatal_exit("%s: \"%s\" does not exist", 549 desc, str); 550 } 551 /* put in a new full path for continued checking */ 552 free(str); 553 } 554 } 555 556 /** check file list, every file must be inside the chroot location */ 557 static void 558 check_chroot_filelist(const char* desc, struct config_strlist* list, 559 const char* chrootdir, struct config_file* cfg) 560 { 561 struct config_strlist* p; 562 for(p=list; p; p=p->next) { 563 check_chroot_string(desc, &p->str, chrootdir, cfg); 564 } 565 } 566 567 /** check file list, with wildcard processing */ 568 static void 569 check_chroot_filelist_wild(const char* desc, struct config_strlist* list, 570 const char* chrootdir, struct config_file* cfg) 571 { 572 struct config_strlist* p; 573 for(p=list; p; p=p->next) { 574 #ifdef HAVE_GLOB 575 if(strchr(p->str, '*') || strchr(p->str, '[') || 576 strchr(p->str, '?') || strchr(p->str, '{') || 577 strchr(p->str, '~')) { 578 char* s = p->str; 579 /* adjust whole pattern for chroot and check later */ 580 p->str = fname_after_chroot(p->str, cfg, 1); 581 free(s); 582 } else 583 #endif /* HAVE_GLOB */ 584 check_chroot_string(desc, &p->str, chrootdir, cfg); 585 } 586 } 587 588 #ifdef CLIENT_SUBNET 589 /** check ECS configuration */ 590 static void 591 ecs_conf_checks(struct config_file* cfg) 592 { 593 struct ecs_whitelist* whitelist = NULL; 594 if(!(whitelist = ecs_whitelist_create())) 595 fatal_exit("Could not create ednssubnet whitelist: out of memory"); 596 if(!ecs_whitelist_apply_cfg(whitelist, cfg)) 597 fatal_exit("Could not setup ednssubnet whitelist"); 598 ecs_whitelist_delete(whitelist); 599 } 600 #endif /* CLIENT_SUBNET */ 601 602 /** check that the modules exist, are compiled in */ 603 static void 604 check_modules_exist(const char* module_conf) 605 { 606 const char** names = module_list_avail(); 607 const char* s = module_conf; 608 while(*s) { 609 int i = 0; 610 int is_ok = 0; 611 while(*s && isspace((unsigned char)*s)) 612 s++; 613 if(!*s) break; 614 while(names[i]) { 615 if(strncmp(names[i], s, strlen(names[i])) == 0) { 616 is_ok = 1; 617 break; 618 } 619 i++; 620 } 621 if(is_ok == 0) { 622 char n[64]; 623 size_t j; 624 n[0]=0; 625 n[sizeof(n)-1]=0; 626 for(j=0; j<sizeof(n)-1; j++) { 627 if(!s[j] || isspace((unsigned char)s[j])) { 628 n[j] = 0; 629 break; 630 } 631 n[j] = s[j]; 632 } 633 fatal_exit("module_conf lists module '%s' but that " 634 "module is not available.", n); 635 } 636 s += strlen(names[i]); 637 } 638 } 639 640 /** check configuration for errors */ 641 static void 642 morechecks(struct config_file* cfg) 643 { 644 warn_hosts("stub-host", cfg->stubs); 645 warn_hosts("forward-host", cfg->forwards); 646 interfacechecks(cfg); 647 ifautomaticportschecks(cfg->if_automatic_ports); 648 aclchecks(cfg); 649 tcpconnlimitchecks(cfg); 650 651 if(cfg->verbosity < 0) 652 fatal_exit("verbosity value < 0"); 653 if(cfg->num_threads <= 0 || cfg->num_threads > 10000) 654 fatal_exit("num_threads value weird"); 655 if(!cfg->do_ip4 && !cfg->do_ip6) 656 fatal_exit("ip4 and ip6 are both disabled, pointless"); 657 if(!cfg->do_ip4 && cfg->prefer_ip4) 658 fatal_exit("cannot prefer and disable ip4, pointless"); 659 if(!cfg->do_ip6 && cfg->prefer_ip6) 660 fatal_exit("cannot prefer and disable ip6, pointless"); 661 if(!cfg->do_udp && !cfg->do_tcp) 662 fatal_exit("udp and tcp are both disabled, pointless"); 663 if(cfg->edns_buffer_size > cfg->msg_buffer_size) 664 fatal_exit("edns-buffer-size larger than msg-buffer-size, " 665 "answers will not fit in processing buffer"); 666 #ifdef UB_ON_WINDOWS 667 w_config_adjust_directory(cfg); 668 #endif 669 if(cfg->chrootdir && cfg->chrootdir[0] && 670 cfg->chrootdir[strlen(cfg->chrootdir)-1] == '/') 671 fatal_exit("chootdir %s has trailing slash '/' please remove.", 672 cfg->chrootdir); 673 if(cfg->chrootdir && cfg->chrootdir[0] && 674 !is_dir(cfg->chrootdir)) { 675 fatal_exit("bad chroot directory"); 676 } 677 if(cfg->directory && cfg->directory[0]) { 678 char* ad = fname_after_chroot(cfg->directory, cfg, 0); 679 if(!ad) fatal_exit("out of memory"); 680 if(!is_dir(ad)) fatal_exit("bad chdir directory"); 681 free(ad); 682 } 683 if( (cfg->chrootdir && cfg->chrootdir[0]) || 684 (cfg->directory && cfg->directory[0])) { 685 if(cfg->pidfile && cfg->pidfile[0]) { 686 char* ad = (cfg->pidfile[0]=='/')?strdup(cfg->pidfile): 687 fname_after_chroot(cfg->pidfile, cfg, 1); 688 char* bd = basedir(ad); 689 if(bd && !is_dir(bd)) 690 fatal_exit("pidfile directory does not exist"); 691 free(ad); 692 } 693 if(cfg->logfile && cfg->logfile[0]) { 694 char* ad = fname_after_chroot(cfg->logfile, cfg, 1); 695 char* bd = basedir(ad); 696 if(bd && !is_dir(bd)) 697 fatal_exit("logfile directory does not exist"); 698 free(ad); 699 } 700 } 701 702 check_chroot_filelist("file with root-hints", 703 cfg->root_hints, cfg->chrootdir, cfg); 704 check_chroot_filelist("trust-anchor-file", 705 cfg->trust_anchor_file_list, cfg->chrootdir, cfg); 706 check_chroot_filelist("auto-trust-anchor-file", 707 cfg->auto_trust_anchor_file_list, cfg->chrootdir, cfg); 708 check_chroot_filelist_wild("trusted-keys-file", 709 cfg->trusted_keys_file_list, cfg->chrootdir, cfg); 710 #ifdef USE_IPSECMOD 711 if(cfg->ipsecmod_enabled && strstr(cfg->module_conf, "ipsecmod")) { 712 /* only check hook if enabled */ 713 check_chroot_string("ipsecmod-hook", &cfg->ipsecmod_hook, 714 cfg->chrootdir, cfg); 715 } 716 #endif 717 /* remove chroot setting so that modules are not stripping pathnames */ 718 free(cfg->chrootdir); 719 cfg->chrootdir = NULL; 720 721 /* check that the modules listed in module_conf exist */ 722 check_modules_exist(cfg->module_conf); 723 724 /* Respip is known to *not* work with dns64. */ 725 if(strcmp(cfg->module_conf, "iterator") != 0 726 && strcmp(cfg->module_conf, "validator iterator") != 0 727 && strcmp(cfg->module_conf, "dns64 validator iterator") != 0 728 && strcmp(cfg->module_conf, "dns64 iterator") != 0 729 && strcmp(cfg->module_conf, "respip iterator") != 0 730 && strcmp(cfg->module_conf, "respip validator iterator") != 0 731 && strcmp(cfg->module_conf, "respip dns64 validator iterator") != 0 732 && strcmp(cfg->module_conf, "respip dns64 iterator") != 0 733 #ifdef WITH_PYTHONMODULE 734 && strcmp(cfg->module_conf, "python iterator") != 0 735 && strcmp(cfg->module_conf, "python respip iterator") != 0 736 && strcmp(cfg->module_conf, "python validator iterator") != 0 737 && strcmp(cfg->module_conf, "python respip validator iterator") != 0 738 && strcmp(cfg->module_conf, "validator python iterator") != 0 739 && strcmp(cfg->module_conf, "dns64 python iterator") != 0 740 && strcmp(cfg->module_conf, "dns64 python validator iterator") != 0 741 && strcmp(cfg->module_conf, "dns64 validator python iterator") != 0 742 && strcmp(cfg->module_conf, "python dns64 iterator") != 0 743 && strcmp(cfg->module_conf, "python dns64 validator iterator") != 0 744 #endif 745 #ifdef WITH_DYNLIBMODULE 746 && strcmp(cfg->module_conf, "dynlib iterator") != 0 747 && strcmp(cfg->module_conf, "dynlib dynlib iterator") != 0 748 && strcmp(cfg->module_conf, "dynlib dynlib dynlib iterator") != 0 749 && strcmp(cfg->module_conf, "python dynlib iterator") != 0 750 && strcmp(cfg->module_conf, "python dynlib dynlib iterator") != 0 751 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib iterator") != 0 752 && strcmp(cfg->module_conf, "dynlib respip iterator") != 0 753 && strcmp(cfg->module_conf, "dynlib validator iterator") != 0 754 && strcmp(cfg->module_conf, "dynlib dynlib validator iterator") != 0 755 && strcmp(cfg->module_conf, "dynlib dynlib dynlib validator iterator") != 0 756 && strcmp(cfg->module_conf, "python dynlib validator iterator") != 0 757 && strcmp(cfg->module_conf, "python dynlib dynlib validator iterator") != 0 758 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib validator iterator") != 0 759 && strcmp(cfg->module_conf, "dynlib respip validator iterator") != 0 760 && strcmp(cfg->module_conf, "validator dynlib iterator") != 0 761 && strcmp(cfg->module_conf, "dns64 dynlib iterator") != 0 762 && strcmp(cfg->module_conf, "dns64 dynlib validator iterator") != 0 763 && strcmp(cfg->module_conf, "dns64 validator dynlib iterator") != 0 764 && strcmp(cfg->module_conf, "dynlib dns64 iterator") != 0 765 && strcmp(cfg->module_conf, "dynlib dns64 validator iterator") != 0 766 && strcmp(cfg->module_conf, "dynlib dns64 cachedb iterator") != 0 767 && strcmp(cfg->module_conf, "dynlib dns64 validator cachedb iterator") != 0 768 && strcmp(cfg->module_conf, "dns64 dynlib cachedb iterator") != 0 769 && strcmp(cfg->module_conf, "dns64 dynlib validator cachedb iterator") != 0 770 && strcmp(cfg->module_conf, "dynlib cachedb iterator") != 0 771 && strcmp(cfg->module_conf, "dynlib respip cachedb iterator") != 0 772 && strcmp(cfg->module_conf, "dynlib validator cachedb iterator") != 0 773 && strcmp(cfg->module_conf, "dynlib respip validator cachedb iterator") != 0 774 && strcmp(cfg->module_conf, "cachedb dynlib iterator") != 0 775 && strcmp(cfg->module_conf, "respip cachedb dynlib iterator") != 0 776 && strcmp(cfg->module_conf, "validator cachedb dynlib iterator") != 0 777 && strcmp(cfg->module_conf, "respip validator cachedb dynlib iterator") != 0 778 && strcmp(cfg->module_conf, "validator dynlib cachedb iterator") != 0 779 && strcmp(cfg->module_conf, "respip validator dynlib cachedb iterator") != 0 780 && strcmp(cfg->module_conf, "dynlib subnetcache iterator") != 0 781 && strcmp(cfg->module_conf, "dynlib respip subnetcache iterator") != 0 782 && strcmp(cfg->module_conf, "subnetcache dynlib iterator") != 0 783 && strcmp(cfg->module_conf, "respip subnetcache dynlib iterator") != 0 784 && strcmp(cfg->module_conf, "dynlib subnetcache validator iterator") != 0 785 && strcmp(cfg->module_conf, "dynlib respip subnetcache validator iterator") != 0 786 && strcmp(cfg->module_conf, "subnetcache dynlib validator iterator") != 0 787 && strcmp(cfg->module_conf, "respip subnetcache dynlib validator iterator") != 0 788 && strcmp(cfg->module_conf, "subnetcache validator dynlib iterator") != 0 789 && strcmp(cfg->module_conf, "respip subnetcache validator dynlib iterator") != 0 790 && strcmp(cfg->module_conf, "dynlib ipsecmod iterator") != 0 791 && strcmp(cfg->module_conf, "dynlib ipsecmod respip iterator") != 0 792 && strcmp(cfg->module_conf, "ipsecmod dynlib iterator") != 0 793 && strcmp(cfg->module_conf, "ipsecmod dynlib respip iterator") != 0 794 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 795 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 796 && strcmp(cfg->module_conf, "dynlib ipsecmod validator iterator") != 0 797 && strcmp(cfg->module_conf, "dynlib ipsecmod respip validator iterator") != 0 798 && strcmp(cfg->module_conf, "ipsecmod dynlib validator iterator") != 0 799 && strcmp(cfg->module_conf, "ipsecmod dynlib respip validator iterator") != 0 800 && strcmp(cfg->module_conf, "ipsecmod validator dynlib iterator") != 0 801 && strcmp(cfg->module_conf, "ipsecmod respip validator dynlib iterator") != 0 802 #endif 803 #ifdef USE_CACHEDB 804 && strcmp(cfg->module_conf, "validator cachedb iterator") != 0 805 && strcmp(cfg->module_conf, "respip validator cachedb iterator") != 0 806 && strcmp(cfg->module_conf, "cachedb iterator") != 0 807 && strcmp(cfg->module_conf, "respip cachedb iterator") != 0 808 && strcmp(cfg->module_conf, "dns64 validator cachedb iterator") != 0 809 && strcmp(cfg->module_conf, "dns64 cachedb iterator") != 0 810 #endif 811 #if defined(WITH_PYTHONMODULE) && defined(USE_CACHEDB) 812 && strcmp(cfg->module_conf, "python dns64 cachedb iterator") != 0 813 && strcmp(cfg->module_conf, "python dns64 validator cachedb iterator") != 0 814 && strcmp(cfg->module_conf, "dns64 python cachedb iterator") != 0 815 && strcmp(cfg->module_conf, "dns64 python validator cachedb iterator") != 0 816 && strcmp(cfg->module_conf, "python cachedb iterator") != 0 817 && strcmp(cfg->module_conf, "python respip cachedb iterator") != 0 818 && strcmp(cfg->module_conf, "python validator cachedb iterator") != 0 819 && strcmp(cfg->module_conf, "python respip validator cachedb iterator") != 0 820 && strcmp(cfg->module_conf, "cachedb python iterator") != 0 821 && strcmp(cfg->module_conf, "respip cachedb python iterator") != 0 822 && strcmp(cfg->module_conf, "validator cachedb python iterator") != 0 823 && strcmp(cfg->module_conf, "respip validator cachedb python iterator") != 0 824 && strcmp(cfg->module_conf, "validator python cachedb iterator") != 0 825 && strcmp(cfg->module_conf, "respip validator python cachedb iterator") != 0 826 #endif 827 #if defined(CLIENT_SUBNET) && defined(USE_CACHEDB) 828 && strcmp(cfg->module_conf, "respip subnetcache validator cachedb iterator") != 0 829 && strcmp(cfg->module_conf, "subnetcache validator cachedb iterator") != 0 830 #endif 831 #ifdef CLIENT_SUBNET 832 && strcmp(cfg->module_conf, "subnetcache iterator") != 0 833 && strcmp(cfg->module_conf, "respip subnetcache iterator") != 0 834 && strcmp(cfg->module_conf, "subnetcache validator iterator") != 0 835 && strcmp(cfg->module_conf, "respip subnetcache validator iterator") != 0 836 && strcmp(cfg->module_conf, "dns64 subnetcache iterator") != 0 837 && strcmp(cfg->module_conf, "dns64 subnetcache validator iterator") != 0 838 && strcmp(cfg->module_conf, "dns64 subnetcache respip iterator") != 0 839 && strcmp(cfg->module_conf, "dns64 subnetcache respip validator iterator") != 0 840 #endif 841 #if defined(WITH_PYTHONMODULE) && defined(CLIENT_SUBNET) 842 && strcmp(cfg->module_conf, "python subnetcache iterator") != 0 843 && strcmp(cfg->module_conf, "python respip subnetcache iterator") != 0 844 && strcmp(cfg->module_conf, "subnetcache python iterator") != 0 845 && strcmp(cfg->module_conf, "respip subnetcache python iterator") != 0 846 && strcmp(cfg->module_conf, "python subnetcache validator iterator") != 0 847 && strcmp(cfg->module_conf, "python respip subnetcache validator iterator") != 0 848 && strcmp(cfg->module_conf, "subnetcache python validator iterator") != 0 849 && strcmp(cfg->module_conf, "respip subnetcache python validator iterator") != 0 850 && strcmp(cfg->module_conf, "subnetcache validator python iterator") != 0 851 && strcmp(cfg->module_conf, "respip subnetcache validator python iterator") != 0 852 #endif 853 #ifdef USE_IPSECMOD 854 && strcmp(cfg->module_conf, "ipsecmod iterator") != 0 855 && strcmp(cfg->module_conf, "ipsecmod respip iterator") != 0 856 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 857 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 858 #endif 859 #if defined(WITH_PYTHONMODULE) && defined(USE_IPSECMOD) 860 && strcmp(cfg->module_conf, "python ipsecmod iterator") != 0 861 && strcmp(cfg->module_conf, "python ipsecmod respip iterator") != 0 862 && strcmp(cfg->module_conf, "ipsecmod python iterator") != 0 863 && strcmp(cfg->module_conf, "ipsecmod python respip iterator") != 0 864 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 865 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 866 && strcmp(cfg->module_conf, "python ipsecmod validator iterator") != 0 867 && strcmp(cfg->module_conf, "python ipsecmod respip validator iterator") != 0 868 && strcmp(cfg->module_conf, "ipsecmod python validator iterator") != 0 869 && strcmp(cfg->module_conf, "ipsecmod python respip validator iterator") != 0 870 && strcmp(cfg->module_conf, "ipsecmod validator python iterator") != 0 871 && strcmp(cfg->module_conf, "ipsecmod respip validator python iterator") != 0 872 #endif 873 #ifdef USE_IPSET 874 && strcmp(cfg->module_conf, "validator ipset iterator") != 0 875 && strcmp(cfg->module_conf, "validator ipset respip iterator") != 0 876 && strcmp(cfg->module_conf, "ipset iterator") != 0 877 && strcmp(cfg->module_conf, "ipset respip iterator") != 0 878 #endif 879 ) { 880 fatal_exit("module conf '%s' is not known to work", 881 cfg->module_conf); 882 } 883 884 #ifdef HAVE_GETPWNAM 885 if(cfg->username && cfg->username[0]) { 886 if(getpwnam(cfg->username) == NULL) 887 fatal_exit("user '%s' does not exist.", cfg->username); 888 # ifdef HAVE_ENDPWENT 889 endpwent(); 890 # endif 891 } 892 #endif 893 if(cfg->remote_control_enable && options_remote_is_address(cfg) 894 && cfg->control_use_cert) { 895 check_chroot_string("server-key-file", &cfg->server_key_file, 896 cfg->chrootdir, cfg); 897 check_chroot_string("server-cert-file", &cfg->server_cert_file, 898 cfg->chrootdir, cfg); 899 if(!is_file(cfg->control_key_file)) 900 fatal_exit("control-key-file: \"%s\" does not exist", 901 cfg->control_key_file); 902 if(!is_file(cfg->control_cert_file)) 903 fatal_exit("control-cert-file: \"%s\" does not exist", 904 cfg->control_cert_file); 905 } 906 907 donotquerylocalhostcheck(cfg); 908 localzonechecks(cfg); 909 view_and_respipchecks(cfg); 910 #ifdef CLIENT_SUBNET 911 ecs_conf_checks(cfg); 912 #endif 913 } 914 915 /** check forwards */ 916 static void 917 check_fwd(struct config_file* cfg) 918 { 919 struct iter_forwards* fwd = forwards_create(); 920 if(!fwd || !forwards_apply_cfg(fwd, cfg)) { 921 fatal_exit("Could not set forward zones"); 922 } 923 forwards_delete(fwd); 924 } 925 926 /** check hints */ 927 static void 928 check_hints(struct config_file* cfg) 929 { 930 struct iter_hints* hints = hints_create(); 931 if(!hints || !hints_apply_cfg(hints, cfg)) { 932 fatal_exit("Could not set root or stub hints"); 933 } 934 hints_delete(hints); 935 } 936 937 /** check auth zones */ 938 static void 939 check_auth(struct config_file* cfg) 940 { 941 int is_rpz = 0; 942 struct auth_zones* az = auth_zones_create(); 943 if(!az || !auth_zones_apply_cfg(az, cfg, 0, &is_rpz, NULL, NULL)) { 944 fatal_exit("Could not setup authority zones"); 945 } 946 auth_zones_delete(az); 947 } 948 949 /** check config file */ 950 static void 951 checkconf(const char* cfgfile, const char* opt, int final) 952 { 953 char oldwd[4096]; 954 struct config_file* cfg = config_create(); 955 if(!cfg) 956 fatal_exit("out of memory"); 957 oldwd[0] = 0; 958 if(!getcwd(oldwd, sizeof(oldwd))) { 959 log_err("cannot getcwd: %s", strerror(errno)); 960 oldwd[0] = 0; 961 } 962 if(!config_read(cfg, cfgfile, NULL)) { 963 /* config_read prints messages to stderr */ 964 config_delete(cfg); 965 exit(1); 966 } 967 if(oldwd[0] && chdir(oldwd) == -1) 968 log_err("cannot chdir(%s): %s", oldwd, strerror(errno)); 969 if(opt) { 970 print_option(cfg, opt, final); 971 config_delete(cfg); 972 return; 973 } 974 morechecks(cfg); 975 check_mod(cfg, iter_get_funcblock()); 976 check_mod(cfg, val_get_funcblock()); 977 #ifdef WITH_PYTHONMODULE 978 if(strstr(cfg->module_conf, "python")) 979 check_mod(cfg, pythonmod_get_funcblock()); 980 #endif 981 check_fwd(cfg); 982 check_hints(cfg); 983 check_auth(cfg); 984 printf("unbound-checkconf: no errors in %s\n", cfgfile); 985 config_delete(cfg); 986 } 987 988 /** getopt global, in case header files fail to declare it. */ 989 extern int optind; 990 /** getopt global, in case header files fail to declare it. */ 991 extern char* optarg; 992 993 /** Main routine for checkconf */ 994 int main(int argc, char* argv[]) 995 { 996 int c; 997 int final = 0; 998 const char* f; 999 const char* opt = NULL; 1000 const char* cfgfile = CONFIGFILE; 1001 checklock_start(); 1002 log_ident_set("unbound-checkconf"); 1003 log_init(NULL, 0, NULL); 1004 #ifdef USE_WINSOCK 1005 /* use registry config file in preference to compiletime location */ 1006 if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile"))) 1007 cfgfile = CONFIGFILE; 1008 #endif /* USE_WINSOCK */ 1009 /* parse the options */ 1010 while( (c=getopt(argc, argv, "fho:")) != -1) { 1011 switch(c) { 1012 case 'f': 1013 final = 1; 1014 break; 1015 case 'o': 1016 opt = optarg; 1017 break; 1018 case '?': 1019 case 'h': 1020 default: 1021 usage(); 1022 } 1023 } 1024 argc -= optind; 1025 argv += optind; 1026 if(argc != 0 && argc != 1) 1027 usage(); 1028 if(argc == 1) 1029 f = argv[0]; 1030 else f = cfgfile; 1031 checkconf(f, opt, final); 1032 checklock_stop(); 1033 return 0; 1034 } 1035