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; 345 346 if(cfg->num_ifs != 0) { 347 resif = (char***)calloc(cfg->num_ifs, sizeof(char**)); 348 if(!resif) fatal_exit("malloc failure"); 349 num_resif = (int*)calloc(cfg->num_ifs, sizeof(int)); 350 if(!num_resif) fatal_exit("malloc failure"); 351 } 352 for(i=0; i<cfg->num_ifs; i++) { 353 /* search for duplicates in IP or ifname arguments */ 354 for(i2=0; i2<i; i2++) { 355 if(strcmp(cfg->ifs[i], cfg->ifs[i2]) == 0) { 356 fatal_exit("interface: %s present twice, " 357 "cannot bind same ports twice.", 358 cfg->ifs[i]); 359 } 360 } 361 if(!resolve_interface_names(&cfg->ifs[i], 1, NULL, &resif[i], 362 &num_resif[i])) { 363 fatal_exit("could not resolve interface names, for %s", 364 cfg->ifs[i]); 365 } 366 /* check for port combinations that are not supported */ 367 if(if_is_pp2(resif[i][0], cfg->port, cfg->proxy_protocol_port)) { 368 if(if_is_dnscrypt(resif[i][0], cfg->port, 369 cfg->dnscrypt_port)) { 370 fatal_exit("PROXYv2 and DNSCrypt combination not " 371 "supported!"); 372 } else if(if_is_https(resif[i][0], cfg->port, 373 cfg->https_port)) { 374 fatal_exit("PROXYv2 and DoH combination not " 375 "supported!"); 376 } else if(if_is_quic(resif[i][0], cfg->port, 377 cfg->quic_port)) { 378 fatal_exit("PROXYv2 and DoQ combination not " 379 "supported!"); 380 } 381 } 382 /* search for duplicates in the returned addresses */ 383 for(j=0; j<num_resif[i]; j++) { 384 if(!extstrtoaddr(resif[i][j], &a, &alen, cfg->port)) { 385 if(strcmp(cfg->ifs[i], resif[i][j]) != 0) 386 fatal_exit("cannot parse interface address '%s' from the interface specified as '%s'", 387 resif[i][j], cfg->ifs[i]); 388 else 389 fatal_exit("cannot parse interface specified as '%s'", 390 cfg->ifs[i]); 391 } 392 for(i2=0; i2<i; i2++) { 393 for(j2=0; j2<num_resif[i2]; j2++) { 394 if(strcmp(resif[i][j], resif[i2][j2]) 395 == 0) { 396 char info1[1024], info2[1024]; 397 if(strcmp(cfg->ifs[i], resif[i][j]) != 0) 398 snprintf(info1, sizeof(info1), "address %s from interface: %s", resif[i][j], cfg->ifs[i]); 399 else snprintf(info1, sizeof(info1), "interface: %s", cfg->ifs[i]); 400 if(strcmp(cfg->ifs[i2], resif[i2][j2]) != 0) 401 snprintf(info2, sizeof(info2), "address %s from interface: %s", resif[i2][j2], cfg->ifs[i2]); 402 else snprintf(info2, sizeof(info2), "interface: %s", cfg->ifs[i2]); 403 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); 404 } 405 } 406 } 407 } 408 } 409 410 for(i=0; i<cfg->num_ifs; i++) { 411 config_del_strarray(resif[i], num_resif[i]); 412 } 413 free(resif); 414 free(num_resif); 415 416 for(i=0; i<cfg->num_out_ifs; i++) { 417 if(!ipstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen) && 418 !netblockstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen, &d)) { 419 fatal_exit("cannot parse outgoing-interface " 420 "specified as '%s'", cfg->out_ifs[i]); 421 } 422 for(j=0; j<cfg->num_out_ifs; j++) { 423 if(i!=j && strcmp(cfg->out_ifs[i], cfg->out_ifs[j])==0) 424 fatal_exit("outgoing-interface: %s present " 425 "twice, cannot bind same ports twice.", 426 cfg->out_ifs[i]); 427 } 428 } 429 } 430 431 /** check interface-automatic-ports */ 432 static void 433 ifautomaticportschecks(char* ifautomaticports) 434 { 435 char* now = ifautomaticports; 436 while(now && *now) { 437 char* after; 438 int extraport; 439 while(isspace((unsigned char)*now)) 440 now++; 441 if(!*now) 442 break; 443 after = now; 444 extraport = (int)strtol(now, &after, 10); 445 if(extraport < 0 || extraport > 65535) 446 fatal_exit("interface-automatic-ports: port out of range at position %d in '%s'", (int)(now-ifautomaticports)+1, ifautomaticports); 447 if(extraport == 0 && now == after) 448 fatal_exit("interface-automatic-ports: parse error at position %d in '%s'", (int)(now-ifautomaticports)+1, ifautomaticports); 449 now = after; 450 } 451 } 452 453 /** check acl ips */ 454 static void 455 aclchecks(struct config_file* cfg) 456 { 457 int d; 458 struct sockaddr_storage a; 459 socklen_t alen; 460 struct config_str2list* acl; 461 for(acl=cfg->acls; acl; acl = acl->next) { 462 if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen, 463 &d)) { 464 fatal_exit("cannot parse access control address %s %s", 465 acl->str, acl->str2); 466 } 467 } 468 } 469 470 /** check tcp connection limit ips */ 471 static void 472 tcpconnlimitchecks(struct config_file* cfg) 473 { 474 int d; 475 struct sockaddr_storage a; 476 socklen_t alen; 477 struct config_str2list* tcl; 478 for(tcl=cfg->tcp_connection_limits; tcl; tcl = tcl->next) { 479 if(!netblockstrtoaddr(tcl->str, UNBOUND_DNS_PORT, &a, &alen, 480 &d)) { 481 fatal_exit("cannot parse tcp connection limit address %s %s", 482 tcl->str, tcl->str2); 483 } 484 } 485 } 486 487 /** true if fname is a file */ 488 static int 489 is_file(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 file\n", fname); 502 return 0; 503 } 504 return 1; 505 } 506 507 /** true if fname is a directory */ 508 static int 509 is_dir(const char* fname) 510 { 511 struct stat buf; 512 if(stat(fname, &buf) < 0) { 513 if(errno==EACCES) { 514 printf("warning: no search permission for one of the directories in path: %s\n", fname); 515 return 1; 516 } 517 perror(fname); 518 return 0; 519 } 520 if(!(S_ISDIR(buf.st_mode))) { 521 printf("%s is not a directory\n", fname); 522 return 0; 523 } 524 return 1; 525 } 526 527 /** get base dir of a fname */ 528 static char* 529 basedir(char* fname) 530 { 531 char* rev; 532 if(!fname) fatal_exit("out of memory"); 533 rev = strrchr(fname, '/'); 534 if(!rev) return NULL; 535 if(fname == rev) return NULL; 536 rev[0] = 0; 537 return fname; 538 } 539 540 /** check chroot for a file string */ 541 static void 542 check_chroot_string(const char* desc, char** ss, 543 const char* chrootdir, struct config_file* cfg) 544 { 545 char* str = *ss; 546 if(str && str[0]) { 547 *ss = fname_after_chroot(str, cfg, 1); 548 if(!*ss) fatal_exit("out of memory"); 549 if(!is_file(*ss)) { 550 if(chrootdir && chrootdir[0]) 551 fatal_exit("%s: \"%s\" does not exist in " 552 "chrootdir %s", desc, str, chrootdir); 553 else 554 fatal_exit("%s: \"%s\" does not exist", 555 desc, str); 556 } 557 /* put in a new full path for continued checking */ 558 free(str); 559 } 560 } 561 562 /** check file list, every file must be inside the chroot location */ 563 static void 564 check_chroot_filelist(const char* desc, struct config_strlist* list, 565 const char* chrootdir, struct config_file* cfg) 566 { 567 struct config_strlist* p; 568 for(p=list; p; p=p->next) { 569 check_chroot_string(desc, &p->str, chrootdir, cfg); 570 } 571 } 572 573 /** check file list, with wildcard processing */ 574 static void 575 check_chroot_filelist_wild(const char* desc, struct config_strlist* list, 576 const char* chrootdir, struct config_file* cfg) 577 { 578 struct config_strlist* p; 579 for(p=list; p; p=p->next) { 580 #ifdef HAVE_GLOB 581 if(strchr(p->str, '*') || strchr(p->str, '[') || 582 strchr(p->str, '?') || strchr(p->str, '{') || 583 strchr(p->str, '~')) { 584 char* s = p->str; 585 /* adjust whole pattern for chroot and check later */ 586 p->str = fname_after_chroot(p->str, cfg, 1); 587 free(s); 588 } else 589 #endif /* HAVE_GLOB */ 590 check_chroot_string(desc, &p->str, chrootdir, cfg); 591 } 592 } 593 594 #ifdef CLIENT_SUBNET 595 /** check ECS configuration */ 596 static void 597 ecs_conf_checks(struct config_file* cfg) 598 { 599 struct ecs_whitelist* whitelist = NULL; 600 if(!(whitelist = ecs_whitelist_create())) 601 fatal_exit("Could not create ednssubnet whitelist: out of memory"); 602 if(!ecs_whitelist_apply_cfg(whitelist, cfg)) 603 fatal_exit("Could not setup ednssubnet whitelist"); 604 ecs_whitelist_delete(whitelist); 605 } 606 #endif /* CLIENT_SUBNET */ 607 608 /** check that the modules exist, are compiled in */ 609 static void 610 check_modules_exist(const char* module_conf) 611 { 612 const char** names = module_list_avail(); 613 const char* s = module_conf; 614 while(*s) { 615 int i = 0; 616 int is_ok = 0; 617 while(*s && isspace((unsigned char)*s)) 618 s++; 619 if(!*s) break; 620 while(names[i]) { 621 if(strncmp(names[i], s, strlen(names[i])) == 0) { 622 is_ok = 1; 623 break; 624 } 625 i++; 626 } 627 if(is_ok == 0) { 628 char n[64]; 629 size_t j; 630 n[0]=0; 631 n[sizeof(n)-1]=0; 632 for(j=0; j<sizeof(n)-1; j++) { 633 if(!s[j] || isspace((unsigned char)s[j])) { 634 n[j] = 0; 635 break; 636 } 637 n[j] = s[j]; 638 } 639 fatal_exit("module_conf lists module '%s' but that " 640 "module is not available.", n); 641 } 642 s += strlen(names[i]); 643 } 644 } 645 646 /** check configuration for errors */ 647 static void 648 morechecks(struct config_file* cfg) 649 { 650 warn_hosts("stub-host", cfg->stubs); 651 warn_hosts("forward-host", cfg->forwards); 652 interfacechecks(cfg); 653 ifautomaticportschecks(cfg->if_automatic_ports); 654 aclchecks(cfg); 655 tcpconnlimitchecks(cfg); 656 657 if(cfg->verbosity < 0) 658 fatal_exit("verbosity value < 0"); 659 if(cfg->num_threads <= 0 || cfg->num_threads > 10000) 660 fatal_exit("num_threads value weird"); 661 if(!cfg->do_ip4 && !cfg->do_ip6) 662 fatal_exit("ip4 and ip6 are both disabled, pointless"); 663 if(!cfg->do_ip4 && cfg->prefer_ip4) 664 fatal_exit("cannot prefer and disable ip4, pointless"); 665 if(!cfg->do_ip6 && cfg->prefer_ip6) 666 fatal_exit("cannot prefer and disable ip6, pointless"); 667 if(!cfg->do_udp && !cfg->do_tcp) 668 fatal_exit("udp and tcp are both disabled, pointless"); 669 if(cfg->edns_buffer_size > cfg->msg_buffer_size) 670 fatal_exit("edns-buffer-size larger than msg-buffer-size, " 671 "answers will not fit in processing buffer"); 672 #ifdef UB_ON_WINDOWS 673 w_config_adjust_directory(cfg); 674 #endif 675 if(cfg->chrootdir && cfg->chrootdir[0] && 676 cfg->chrootdir[strlen(cfg->chrootdir)-1] == '/') 677 fatal_exit("chootdir %s has trailing slash '/' please remove.", 678 cfg->chrootdir); 679 if(cfg->chrootdir && cfg->chrootdir[0] && 680 !is_dir(cfg->chrootdir)) { 681 fatal_exit("bad chroot directory"); 682 } 683 if(cfg->directory && cfg->directory[0]) { 684 char* ad = fname_after_chroot(cfg->directory, cfg, 0); 685 if(!ad) fatal_exit("out of memory"); 686 if(!is_dir(ad)) fatal_exit("bad chdir directory"); 687 free(ad); 688 } 689 if( (cfg->chrootdir && cfg->chrootdir[0]) || 690 (cfg->directory && cfg->directory[0])) { 691 if(cfg->pidfile && cfg->pidfile[0]) { 692 char* ad = (cfg->pidfile[0]=='/')?strdup(cfg->pidfile): 693 fname_after_chroot(cfg->pidfile, cfg, 1); 694 char* bd = basedir(ad); 695 if(bd && !is_dir(bd)) 696 fatal_exit("pidfile directory does not exist"); 697 free(ad); 698 } 699 if(cfg->logfile && cfg->logfile[0]) { 700 char* ad = fname_after_chroot(cfg->logfile, cfg, 1); 701 char* bd = basedir(ad); 702 if(bd && !is_dir(bd)) 703 fatal_exit("logfile directory does not exist"); 704 free(ad); 705 } 706 } 707 708 check_chroot_filelist("file with root-hints", 709 cfg->root_hints, cfg->chrootdir, cfg); 710 check_chroot_filelist("trust-anchor-file", 711 cfg->trust_anchor_file_list, cfg->chrootdir, cfg); 712 check_chroot_filelist("auto-trust-anchor-file", 713 cfg->auto_trust_anchor_file_list, cfg->chrootdir, cfg); 714 check_chroot_filelist_wild("trusted-keys-file", 715 cfg->trusted_keys_file_list, cfg->chrootdir, cfg); 716 if(cfg->disable_edns_do && strstr(cfg->module_conf, "validator") 717 && (cfg->trust_anchor_file_list 718 || cfg->trust_anchor_list 719 || cfg->auto_trust_anchor_file_list 720 || cfg->trusted_keys_file_list)) { 721 char* key = NULL; 722 if(cfg->auto_trust_anchor_file_list) 723 key = cfg->auto_trust_anchor_file_list->str; 724 if(!key && cfg->trust_anchor_file_list) 725 key = cfg->trust_anchor_file_list->str; 726 if(!key && cfg->trust_anchor_list) 727 key = cfg->trust_anchor_list->str; 728 if(!key && cfg->trusted_keys_file_list) 729 key = cfg->trusted_keys_file_list->str; 730 if(!key) key = ""; 731 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); 732 } 733 #ifdef USE_IPSECMOD 734 if(cfg->ipsecmod_enabled && strstr(cfg->module_conf, "ipsecmod")) { 735 /* only check hook if enabled */ 736 check_chroot_string("ipsecmod-hook", &cfg->ipsecmod_hook, 737 cfg->chrootdir, cfg); 738 } 739 #endif 740 /* remove chroot setting so that modules are not stripping pathnames */ 741 free(cfg->chrootdir); 742 cfg->chrootdir = NULL; 743 744 /* check that the modules listed in module_conf exist */ 745 check_modules_exist(cfg->module_conf); 746 747 /* Respip is known to *not* work with dns64. */ 748 if(strcmp(cfg->module_conf, "iterator") != 0 749 && strcmp(cfg->module_conf, "validator iterator") != 0 750 && strcmp(cfg->module_conf, "dns64 validator iterator") != 0 751 && strcmp(cfg->module_conf, "dns64 iterator") != 0 752 && strcmp(cfg->module_conf, "respip iterator") != 0 753 && strcmp(cfg->module_conf, "respip validator iterator") != 0 754 && strcmp(cfg->module_conf, "respip dns64 validator iterator") != 0 755 && strcmp(cfg->module_conf, "respip dns64 iterator") != 0 756 #ifdef WITH_PYTHONMODULE 757 && strcmp(cfg->module_conf, "python iterator") != 0 758 && strcmp(cfg->module_conf, "python respip iterator") != 0 759 && strcmp(cfg->module_conf, "python validator iterator") != 0 760 && strcmp(cfg->module_conf, "python respip validator iterator") != 0 761 && strcmp(cfg->module_conf, "validator python iterator") != 0 762 && strcmp(cfg->module_conf, "dns64 python iterator") != 0 763 && strcmp(cfg->module_conf, "dns64 python validator iterator") != 0 764 && strcmp(cfg->module_conf, "dns64 validator python iterator") != 0 765 && strcmp(cfg->module_conf, "python dns64 iterator") != 0 766 && strcmp(cfg->module_conf, "python dns64 validator iterator") != 0 767 #endif 768 #ifdef WITH_DYNLIBMODULE 769 && strcmp(cfg->module_conf, "dynlib iterator") != 0 770 && strcmp(cfg->module_conf, "dynlib dynlib iterator") != 0 771 && strcmp(cfg->module_conf, "dynlib dynlib dynlib iterator") != 0 772 && strcmp(cfg->module_conf, "python dynlib iterator") != 0 773 && strcmp(cfg->module_conf, "python dynlib dynlib iterator") != 0 774 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib iterator") != 0 775 && strcmp(cfg->module_conf, "dynlib respip iterator") != 0 776 && strcmp(cfg->module_conf, "dynlib validator iterator") != 0 777 && strcmp(cfg->module_conf, "dynlib dynlib validator iterator") != 0 778 && strcmp(cfg->module_conf, "dynlib dynlib dynlib validator iterator") != 0 779 && strcmp(cfg->module_conf, "python dynlib validator iterator") != 0 780 && strcmp(cfg->module_conf, "python dynlib dynlib validator iterator") != 0 781 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib validator iterator") != 0 782 && strcmp(cfg->module_conf, "dynlib respip validator iterator") != 0 783 && strcmp(cfg->module_conf, "validator dynlib iterator") != 0 784 && strcmp(cfg->module_conf, "dns64 dynlib iterator") != 0 785 && strcmp(cfg->module_conf, "dns64 dynlib validator iterator") != 0 786 && strcmp(cfg->module_conf, "dns64 validator dynlib iterator") != 0 787 && strcmp(cfg->module_conf, "dynlib dns64 iterator") != 0 788 && strcmp(cfg->module_conf, "dynlib dns64 validator iterator") != 0 789 && strcmp(cfg->module_conf, "dynlib dns64 cachedb iterator") != 0 790 && strcmp(cfg->module_conf, "dynlib dns64 validator cachedb iterator") != 0 791 && strcmp(cfg->module_conf, "dns64 dynlib cachedb iterator") != 0 792 && strcmp(cfg->module_conf, "dns64 dynlib validator cachedb iterator") != 0 793 && strcmp(cfg->module_conf, "dynlib cachedb iterator") != 0 794 && strcmp(cfg->module_conf, "dynlib respip cachedb iterator") != 0 795 && strcmp(cfg->module_conf, "dynlib validator cachedb iterator") != 0 796 && strcmp(cfg->module_conf, "dynlib respip validator cachedb iterator") != 0 797 && strcmp(cfg->module_conf, "cachedb dynlib iterator") != 0 798 && strcmp(cfg->module_conf, "respip cachedb dynlib iterator") != 0 799 && strcmp(cfg->module_conf, "validator cachedb dynlib iterator") != 0 800 && strcmp(cfg->module_conf, "respip validator cachedb dynlib iterator") != 0 801 && strcmp(cfg->module_conf, "validator dynlib cachedb iterator") != 0 802 && strcmp(cfg->module_conf, "respip validator dynlib cachedb iterator") != 0 803 && strcmp(cfg->module_conf, "dynlib subnetcache iterator") != 0 804 && strcmp(cfg->module_conf, "dynlib respip subnetcache iterator") != 0 805 && strcmp(cfg->module_conf, "subnetcache dynlib iterator") != 0 806 && strcmp(cfg->module_conf, "respip subnetcache dynlib iterator") != 0 807 && strcmp(cfg->module_conf, "dynlib subnetcache validator iterator") != 0 808 && strcmp(cfg->module_conf, "dynlib respip subnetcache validator iterator") != 0 809 && strcmp(cfg->module_conf, "subnetcache dynlib validator iterator") != 0 810 && strcmp(cfg->module_conf, "respip subnetcache dynlib validator iterator") != 0 811 && strcmp(cfg->module_conf, "subnetcache validator dynlib iterator") != 0 812 && strcmp(cfg->module_conf, "respip subnetcache validator dynlib iterator") != 0 813 && strcmp(cfg->module_conf, "dynlib ipsecmod iterator") != 0 814 && strcmp(cfg->module_conf, "dynlib ipsecmod respip iterator") != 0 815 && strcmp(cfg->module_conf, "ipsecmod dynlib iterator") != 0 816 && strcmp(cfg->module_conf, "ipsecmod dynlib respip iterator") != 0 817 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 818 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 819 && strcmp(cfg->module_conf, "dynlib ipsecmod validator iterator") != 0 820 && strcmp(cfg->module_conf, "dynlib ipsecmod respip validator iterator") != 0 821 && strcmp(cfg->module_conf, "ipsecmod dynlib validator iterator") != 0 822 && strcmp(cfg->module_conf, "ipsecmod dynlib respip validator iterator") != 0 823 && strcmp(cfg->module_conf, "ipsecmod validator dynlib iterator") != 0 824 && strcmp(cfg->module_conf, "ipsecmod respip validator dynlib iterator") != 0 825 #endif 826 #ifdef USE_CACHEDB 827 && strcmp(cfg->module_conf, "validator cachedb iterator") != 0 828 && strcmp(cfg->module_conf, "respip validator cachedb iterator") != 0 829 && strcmp(cfg->module_conf, "cachedb iterator") != 0 830 && strcmp(cfg->module_conf, "respip cachedb iterator") != 0 831 && strcmp(cfg->module_conf, "dns64 validator cachedb iterator") != 0 832 && strcmp(cfg->module_conf, "dns64 cachedb iterator") != 0 833 #endif 834 #if defined(WITH_PYTHONMODULE) && defined(USE_CACHEDB) 835 && strcmp(cfg->module_conf, "python dns64 cachedb iterator") != 0 836 && strcmp(cfg->module_conf, "python dns64 validator cachedb iterator") != 0 837 && strcmp(cfg->module_conf, "dns64 python cachedb iterator") != 0 838 && strcmp(cfg->module_conf, "dns64 python validator cachedb iterator") != 0 839 && strcmp(cfg->module_conf, "python cachedb iterator") != 0 840 && strcmp(cfg->module_conf, "python respip cachedb iterator") != 0 841 && strcmp(cfg->module_conf, "python validator cachedb iterator") != 0 842 && strcmp(cfg->module_conf, "python respip validator cachedb iterator") != 0 843 && strcmp(cfg->module_conf, "cachedb python iterator") != 0 844 && strcmp(cfg->module_conf, "respip cachedb python iterator") != 0 845 && strcmp(cfg->module_conf, "validator cachedb python iterator") != 0 846 && strcmp(cfg->module_conf, "respip validator cachedb python iterator") != 0 847 && strcmp(cfg->module_conf, "validator python cachedb iterator") != 0 848 && strcmp(cfg->module_conf, "respip validator python cachedb iterator") != 0 849 #endif 850 #if defined(CLIENT_SUBNET) && defined(USE_CACHEDB) 851 && strcmp(cfg->module_conf, "respip subnetcache validator cachedb iterator") != 0 852 && strcmp(cfg->module_conf, "subnetcache validator cachedb iterator") != 0 853 #endif 854 #ifdef CLIENT_SUBNET 855 && strcmp(cfg->module_conf, "subnetcache iterator") != 0 856 && strcmp(cfg->module_conf, "respip subnetcache iterator") != 0 857 && strcmp(cfg->module_conf, "subnetcache validator iterator") != 0 858 && strcmp(cfg->module_conf, "respip subnetcache validator iterator") != 0 859 && strcmp(cfg->module_conf, "dns64 subnetcache iterator") != 0 860 && strcmp(cfg->module_conf, "dns64 subnetcache validator iterator") != 0 861 && strcmp(cfg->module_conf, "dns64 subnetcache respip iterator") != 0 862 && strcmp(cfg->module_conf, "dns64 subnetcache respip validator iterator") != 0 863 #endif 864 #if defined(WITH_PYTHONMODULE) && defined(CLIENT_SUBNET) 865 && strcmp(cfg->module_conf, "python subnetcache iterator") != 0 866 && strcmp(cfg->module_conf, "python respip subnetcache iterator") != 0 867 && strcmp(cfg->module_conf, "subnetcache python iterator") != 0 868 && strcmp(cfg->module_conf, "respip subnetcache python iterator") != 0 869 && strcmp(cfg->module_conf, "python subnetcache validator iterator") != 0 870 && strcmp(cfg->module_conf, "python respip subnetcache validator iterator") != 0 871 && strcmp(cfg->module_conf, "subnetcache python validator iterator") != 0 872 && strcmp(cfg->module_conf, "respip subnetcache python validator iterator") != 0 873 && strcmp(cfg->module_conf, "subnetcache validator python iterator") != 0 874 && strcmp(cfg->module_conf, "respip subnetcache validator python iterator") != 0 875 #endif 876 #ifdef USE_IPSECMOD 877 && strcmp(cfg->module_conf, "ipsecmod iterator") != 0 878 && strcmp(cfg->module_conf, "ipsecmod respip iterator") != 0 879 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 880 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 881 #endif 882 #if defined(WITH_PYTHONMODULE) && defined(USE_IPSECMOD) 883 && strcmp(cfg->module_conf, "python ipsecmod iterator") != 0 884 && strcmp(cfg->module_conf, "python ipsecmod respip iterator") != 0 885 && strcmp(cfg->module_conf, "ipsecmod python iterator") != 0 886 && strcmp(cfg->module_conf, "ipsecmod python respip iterator") != 0 887 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 888 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 889 && strcmp(cfg->module_conf, "python ipsecmod validator iterator") != 0 890 && strcmp(cfg->module_conf, "python ipsecmod respip validator iterator") != 0 891 && strcmp(cfg->module_conf, "ipsecmod python validator iterator") != 0 892 && strcmp(cfg->module_conf, "ipsecmod python respip validator iterator") != 0 893 && strcmp(cfg->module_conf, "ipsecmod validator python iterator") != 0 894 && strcmp(cfg->module_conf, "ipsecmod respip validator python iterator") != 0 895 #endif 896 #ifdef USE_IPSET 897 && strcmp(cfg->module_conf, "validator ipset iterator") != 0 898 && strcmp(cfg->module_conf, "validator ipset respip iterator") != 0 899 && strcmp(cfg->module_conf, "ipset iterator") != 0 900 && strcmp(cfg->module_conf, "ipset respip iterator") != 0 901 #endif 902 ) { 903 fatal_exit("module conf '%s' is not known to work", 904 cfg->module_conf); 905 } 906 907 #ifdef HAVE_GETPWNAM 908 if(cfg->username && cfg->username[0]) { 909 if(getpwnam(cfg->username) == NULL) 910 fatal_exit("user '%s' does not exist.", cfg->username); 911 # ifdef HAVE_ENDPWENT 912 endpwent(); 913 # endif 914 } 915 #endif 916 if(cfg->remote_control_enable && options_remote_is_address(cfg) 917 && cfg->control_use_cert) { 918 check_chroot_string("server-key-file", &cfg->server_key_file, 919 cfg->chrootdir, cfg); 920 check_chroot_string("server-cert-file", &cfg->server_cert_file, 921 cfg->chrootdir, cfg); 922 if(!is_file(cfg->control_key_file)) 923 fatal_exit("control-key-file: \"%s\" does not exist", 924 cfg->control_key_file); 925 if(!is_file(cfg->control_cert_file)) 926 fatal_exit("control-cert-file: \"%s\" does not exist", 927 cfg->control_cert_file); 928 } 929 930 donotquerylocalhostcheck(cfg); 931 localzonechecks(cfg); 932 view_and_respipchecks(cfg); 933 #ifdef CLIENT_SUBNET 934 ecs_conf_checks(cfg); 935 #endif 936 } 937 938 /** check forwards */ 939 static void 940 check_fwd(struct config_file* cfg) 941 { 942 struct iter_forwards* fwd = forwards_create(); 943 if(!fwd || !forwards_apply_cfg(fwd, cfg)) { 944 fatal_exit("Could not set forward zones"); 945 } 946 forwards_delete(fwd); 947 } 948 949 /** check hints */ 950 static void 951 check_hints(struct config_file* cfg) 952 { 953 struct iter_hints* hints = hints_create(); 954 if(!hints || !hints_apply_cfg(hints, cfg)) { 955 fatal_exit("Could not set root or stub hints"); 956 } 957 hints_delete(hints); 958 } 959 960 /** check auth zones */ 961 static void 962 check_auth(struct config_file* cfg) 963 { 964 int is_rpz = 0; 965 struct auth_zones* az = auth_zones_create(); 966 if(!az || !auth_zones_apply_cfg(az, cfg, 0, &is_rpz, NULL, NULL)) { 967 fatal_exit("Could not setup authority zones"); 968 } 969 auth_zones_delete(az); 970 } 971 972 /** check config file */ 973 static void 974 checkconf(const char* cfgfile, const char* opt, int final, int quiet) 975 { 976 char oldwd[4096]; 977 struct config_file* cfg = config_create(); 978 if(!cfg) 979 fatal_exit("out of memory"); 980 oldwd[0] = 0; 981 if(!getcwd(oldwd, sizeof(oldwd))) { 982 log_err("cannot getcwd: %s", strerror(errno)); 983 oldwd[0] = 0; 984 } 985 if(!config_read(cfg, cfgfile, NULL)) { 986 /* config_read prints messages to stderr */ 987 config_delete(cfg); 988 exit(1); 989 } 990 if(oldwd[0] && chdir(oldwd) == -1) 991 log_err("cannot chdir(%s): %s", oldwd, strerror(errno)); 992 if(opt) { 993 print_option(cfg, opt, final); 994 config_delete(cfg); 995 return; 996 } 997 morechecks(cfg); 998 check_mod(cfg, iter_get_funcblock()); 999 check_mod(cfg, val_get_funcblock()); 1000 #ifdef WITH_PYTHONMODULE 1001 if(strstr(cfg->module_conf, "python")) 1002 check_mod(cfg, pythonmod_get_funcblock()); 1003 #endif 1004 check_fwd(cfg); 1005 check_hints(cfg); 1006 check_auth(cfg); 1007 if(!quiet) { printf("unbound-checkconf: no errors in %s\n", cfgfile); } 1008 config_delete(cfg); 1009 } 1010 1011 /** getopt global, in case header files fail to declare it. */ 1012 extern int optind; 1013 /** getopt global, in case header files fail to declare it. */ 1014 extern char* optarg; 1015 1016 /** Main routine for checkconf */ 1017 int main(int argc, char* argv[]) 1018 { 1019 int c; 1020 int final = 0; 1021 int quiet = 0; 1022 const char* f; 1023 const char* opt = NULL; 1024 const char* cfgfile = CONFIGFILE; 1025 checklock_start(); 1026 log_ident_set("unbound-checkconf"); 1027 log_init(NULL, 0, NULL); 1028 #ifdef USE_WINSOCK 1029 /* use registry config file in preference to compiletime location */ 1030 if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile"))) 1031 cfgfile = CONFIGFILE; 1032 #endif /* USE_WINSOCK */ 1033 /* parse the options */ 1034 while( (c=getopt(argc, argv, "fhqo:")) != -1) { 1035 switch(c) { 1036 case 'f': 1037 final = 1; 1038 break; 1039 case 'o': 1040 opt = optarg; 1041 break; 1042 case 'q': 1043 quiet = 1; 1044 break; 1045 case '?': 1046 case 'h': 1047 default: 1048 usage(); 1049 } 1050 } 1051 argc -= optind; 1052 argv += optind; 1053 if(argc != 0 && argc != 1) 1054 usage(); 1055 if(argc == 1) 1056 f = argv[0]; 1057 else f = cfgfile; 1058 checkconf(f, opt, final, quiet); 1059 checklock_stop(); 1060 return 0; 1061 } 1062