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). */ 83static void 84usage(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 */ 106static void 107print_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 */ 131static void 132check_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->init)(&env, 0)) { 144 fatal_exit("bad config for %s module", fb->name); 145 } 146 (*fb->deinit)(&env, 0); 147 sldns_buffer_free(env.scratch_buffer); 148 regional_destroy(env.scratch); 149 edns_known_options_delete(&env); 150} 151 152/** true if addr is a localhost address, 127.0.0.1 or ::1 (with maybe "@port" 153 * after it) */ 154static int 155str_addr_is_localhost(const char* a) 156{ 157 if(strncmp(a, "127.", 4) == 0) return 1; 158 if(strncmp(a, "::1", 3) == 0) return 1; 159 return 0; 160} 161 162/** check do-not-query-localhost */ 163static void 164donotquerylocalhostcheck(struct config_file* cfg) 165{ 166 if(cfg->donotquery_localhost) { 167 struct config_stub* p; 168 struct config_strlist* s; 169 for(p=cfg->forwards; p; p=p->next) { 170 for(s=p->addrs; s; s=s->next) { 171 if(str_addr_is_localhost(s->str)) { 172 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", 173 s->str, p->name); 174 } 175 } 176 } 177 for(p=cfg->stubs; p; p=p->next) { 178 for(s=p->addrs; s; s=s->next) { 179 if(str_addr_is_localhost(s->str)) { 180 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", 181 s->str, p->name); 182 } 183 } 184 } 185 } 186} 187 188/** check localzones */ 189static void 190localzonechecks(struct config_file* cfg) 191{ 192 struct local_zones* zs; 193 if(!(zs = local_zones_create())) 194 fatal_exit("out of memory"); 195 if(!local_zones_apply_cfg(zs, cfg)) 196 fatal_exit("failed local-zone, local-data configuration"); 197 local_zones_delete(zs); 198} 199 200/** checks for acl and views */ 201static void 202acl_view_tag_checks(struct config_file* cfg, struct views* views) 203{ 204 int d; 205 struct sockaddr_storage a; 206 socklen_t alen; 207 struct config_str2list* acl; 208 struct config_str3list* s3; 209 struct config_strbytelist* sb; 210 211 /* acl_view */ 212 for(acl=cfg->acl_view; acl; acl = acl->next) { 213 struct view* v; 214 if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen, 215 &d)) { 216 fatal_exit("cannot parse access-control-view " 217 "address %s %s", acl->str, acl->str2); 218 } 219 v = views_find_view(views, acl->str2, 0); 220 if(!v) { 221 fatal_exit("cannot find view for " 222 "access-control-view: %s %s", 223 acl->str, acl->str2); 224 } 225 lock_rw_unlock(&v->lock); 226 } 227 228 /* acl_tags */ 229 for(sb=cfg->acl_tags; sb; sb = sb->next) { 230 if(!netblockstrtoaddr(sb->str, UNBOUND_DNS_PORT, &a, &alen, 231 &d)) { 232 fatal_exit("cannot parse access-control-tags " 233 "address %s", sb->str); 234 } 235 } 236 237 /* acl_tag_actions */ 238 for(s3=cfg->acl_tag_actions; s3; s3 = s3->next) { 239 enum localzone_type t; 240 if(!netblockstrtoaddr(s3->str, UNBOUND_DNS_PORT, &a, &alen, 241 &d)) { 242 fatal_exit("cannot parse access-control-tag-actions " 243 "address %s %s %s", 244 s3->str, s3->str2, s3->str3); 245 } 246 if(find_tag_id(cfg, s3->str2) == -1) { 247 fatal_exit("cannot parse tag %s (define-tag it), " 248 "for access-control-tag-actions: %s %s %s", 249 s3->str2, s3->str, s3->str2, s3->str3); 250 } 251 if(!local_zone_str2type(s3->str3, &t)) { 252 fatal_exit("cannot parse access control action type %s" 253 " for access-control-tag-actions: %s %s %s", 254 s3->str3, s3->str, s3->str2, s3->str3); 255 } 256 } 257 258 /* acl_tag_datas */ 259 for(s3=cfg->acl_tag_datas; s3; s3 = s3->next) { 260 char buf[65536]; 261 uint8_t rr[LDNS_RR_BUF_SIZE]; 262 size_t len = sizeof(rr); 263 int res; 264 if(!netblockstrtoaddr(s3->str, UNBOUND_DNS_PORT, &a, &alen, 265 &d)) { 266 fatal_exit("cannot parse access-control-tag-datas address %s %s '%s'", 267 s3->str, s3->str2, s3->str3); 268 } 269 if(find_tag_id(cfg, s3->str2) == -1) { 270 fatal_exit("cannot parse tag %s (define-tag it), " 271 "for access-control-tag-datas: %s %s '%s'", 272 s3->str2, s3->str, s3->str2, s3->str3); 273 } 274 /* '.' is sufficient for validation, and it makes the call to 275 * sldns_wirerr_get_type() simpler below. */ 276 snprintf(buf, sizeof(buf), "%s %s", ".", s3->str3); 277 res = sldns_str2wire_rr_buf(buf, rr, &len, NULL, 3600, NULL, 278 0, NULL, 0); 279 if(res != 0) { 280 fatal_exit("cannot parse rr data [char %d] parse error %s, for access-control-tag-datas: %s %s '%s'", 281 (int)LDNS_WIREPARSE_OFFSET(res)-2, 282 sldns_get_errorstr_parse(res), 283 s3->str, s3->str2, s3->str3); 284 } 285 } 286} 287 288/** check view and response-ip configuration */ 289static void 290view_and_respipchecks(struct config_file* cfg) 291{ 292 struct views* views = NULL; 293 struct respip_set* respip = NULL; 294 int ignored = 0; 295 if(!(views = views_create())) 296 fatal_exit("Could not create views: out of memory"); 297 if(!(respip = respip_set_create())) 298 fatal_exit("Could not create respip set: out of memory"); 299 if(!views_apply_cfg(views, cfg)) 300 fatal_exit("Could not set up views"); 301 if(!respip_global_apply_cfg(respip, cfg)) 302 fatal_exit("Could not setup respip set"); 303 if(!respip_views_apply_cfg(views, cfg, &ignored)) 304 fatal_exit("Could not setup per-view respip sets"); 305 acl_view_tag_checks(cfg, views); 306 views_delete(views); 307 respip_set_delete(respip); 308} 309 310/** emit warnings for IP in hosts */ 311static void 312warn_hosts(const char* typ, struct config_stub* list) 313{ 314 struct sockaddr_storage a; 315 socklen_t alen; 316 struct config_stub* s; 317 struct config_strlist* h; 318 for(s=list; s; s=s->next) { 319 for(h=s->hosts; h; h=h->next) { 320 if(extstrtoaddr(h->str, &a, &alen, UNBOUND_DNS_PORT)) { 321 fprintf(stderr, "unbound-checkconf: warning:" 322 " %s %s: \"%s\" is an IP%s address, " 323 "and when looked up as a host name " 324 "during use may not resolve.\n", 325 s->name, typ, h->str, 326 addr_is_ip6(&a, alen)?"6":"4"); 327 } 328 } 329 } 330} 331 332/** check interface strings */ 333static void 334interfacechecks(struct config_file* cfg) 335{ 336 int d; 337 struct sockaddr_storage a; 338 socklen_t alen; 339 int i, j, i2, j2; 340 char*** resif = NULL; 341 int* num_resif = NULL; 342 char portbuf[32]; 343 snprintf(portbuf, sizeof(portbuf), "%d", cfg->port); 344 345 if(cfg->num_ifs != 0) { 346 resif = (char***)calloc(cfg->num_ifs, sizeof(char**)); 347 if(!resif) fatal_exit("malloc failure"); 348 num_resif = (int*)calloc(cfg->num_ifs, sizeof(int)); 349 if(!num_resif) fatal_exit("malloc failure"); 350 } 351 for(i=0; i<cfg->num_ifs; i++) { 352 /* search for duplicates in IP or ifname arguments */ 353 for(i2=0; i2<i; i2++) { 354 if(strcmp(cfg->ifs[i], cfg->ifs[i2]) == 0) { 355 fatal_exit("interface: %s present twice, " 356 "cannot bind same ports twice.", 357 cfg->ifs[i]); 358 } 359 } 360 if(!resolve_interface_names(&cfg->ifs[i], 1, NULL, &resif[i], 361 &num_resif[i])) { 362 fatal_exit("could not resolve interface names, for %s", 363 cfg->ifs[i]); 364 } 365 /* check for port combinations that are not supported */ 366 if(if_is_pp2(resif[i][0], portbuf, cfg->proxy_protocol_port)) { 367 if(if_is_dnscrypt(resif[i][0], portbuf, 368 cfg->dnscrypt_port)) { 369 fatal_exit("PROXYv2 and DNSCrypt combination not " 370 "supported!"); 371 } else if(if_is_https(resif[i][0], portbuf, 372 cfg->https_port)) { 373 fatal_exit("PROXYv2 and DoH combination not " 374 "supported!"); 375 } 376 } 377 /* search for duplicates in the returned addresses */ 378 for(j=0; j<num_resif[i]; j++) { 379 if(!extstrtoaddr(resif[i][j], &a, &alen, cfg->port)) { 380 if(strcmp(cfg->ifs[i], resif[i][j]) != 0) 381 fatal_exit("cannot parse interface address '%s' from the interface specified as '%s'", 382 resif[i][j], cfg->ifs[i]); 383 else 384 fatal_exit("cannot parse interface specified as '%s'", 385 cfg->ifs[i]); 386 } 387 for(i2=0; i2<i; i2++) { 388 for(j2=0; j2<num_resif[i2]; j2++) { 389 if(strcmp(resif[i][j], resif[i2][j2]) 390 == 0) { 391 char info1[1024], info2[1024]; 392 if(strcmp(cfg->ifs[i], resif[i][j]) != 0) 393 snprintf(info1, sizeof(info1), "address %s from interface: %s", resif[i][j], cfg->ifs[i]); 394 else snprintf(info1, sizeof(info1), "interface: %s", cfg->ifs[i]); 395 if(strcmp(cfg->ifs[i2], resif[i2][j2]) != 0) 396 snprintf(info2, sizeof(info2), "address %s from interface: %s", resif[i2][j2], cfg->ifs[i2]); 397 else snprintf(info2, sizeof(info2), "interface: %s", cfg->ifs[i2]); 398 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); 399 } 400 } 401 } 402 } 403 } 404 405 for(i=0; i<cfg->num_ifs; i++) { 406 config_del_strarray(resif[i], num_resif[i]); 407 } 408 free(resif); 409 free(num_resif); 410 411 for(i=0; i<cfg->num_out_ifs; i++) { 412 if(!ipstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen) && 413 !netblockstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen, &d)) { 414 fatal_exit("cannot parse outgoing-interface " 415 "specified as '%s'", cfg->out_ifs[i]); 416 } 417 for(j=0; j<cfg->num_out_ifs; j++) { 418 if(i!=j && strcmp(cfg->out_ifs[i], cfg->out_ifs[j])==0) 419 fatal_exit("outgoing-interface: %s present " 420 "twice, cannot bind same ports twice.", 421 cfg->out_ifs[i]); 422 } 423 } 424} 425 426/** check interface-automatic-ports */ 427static void 428ifautomaticportschecks(char* ifautomaticports) 429{ 430 char* now = ifautomaticports; 431 while(now && *now) { 432 char* after; 433 int extraport; 434 while(isspace((unsigned char)*now)) 435 now++; 436 if(!*now) 437 break; 438 after = now; 439 extraport = (int)strtol(now, &after, 10); 440 if(extraport < 0 || extraport > 65535) 441 fatal_exit("interface-automatic-ports: port out of range at position %d in '%s'", (int)(now-ifautomaticports)+1, ifautomaticports); 442 if(extraport == 0 && now == after) 443 fatal_exit("interface-automatic-ports: parse error at position %d in '%s'", (int)(now-ifautomaticports)+1, ifautomaticports); 444 now = after; 445 } 446} 447 448/** check acl ips */ 449static void 450aclchecks(struct config_file* cfg) 451{ 452 int d; 453 struct sockaddr_storage a; 454 socklen_t alen; 455 struct config_str2list* acl; 456 for(acl=cfg->acls; acl; acl = acl->next) { 457 if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen, 458 &d)) { 459 fatal_exit("cannot parse access control address %s %s", 460 acl->str, acl->str2); 461 } 462 } 463} 464 465/** check tcp connection limit ips */ 466static void 467tcpconnlimitchecks(struct config_file* cfg) 468{ 469 int d; 470 struct sockaddr_storage a; 471 socklen_t alen; 472 struct config_str2list* tcl; 473 for(tcl=cfg->tcp_connection_limits; tcl; tcl = tcl->next) { 474 if(!netblockstrtoaddr(tcl->str, UNBOUND_DNS_PORT, &a, &alen, 475 &d)) { 476 fatal_exit("cannot parse tcp connection limit address %s %s", 477 tcl->str, tcl->str2); 478 } 479 } 480} 481 482/** true if fname is a file */ 483static int 484is_file(const char* fname) 485{ 486 struct stat buf; 487 if(stat(fname, &buf) < 0) { 488 if(errno==EACCES) { 489 printf("warning: no search permission for one of the directories in path: %s\n", fname); 490 return 1; 491 } 492 perror(fname); 493 return 0; 494 } 495 if(S_ISDIR(buf.st_mode)) { 496 printf("%s is not a file\n", fname); 497 return 0; 498 } 499 return 1; 500} 501 502/** true if fname is a directory */ 503static int 504is_dir(const char* fname) 505{ 506 struct stat buf; 507 if(stat(fname, &buf) < 0) { 508 if(errno==EACCES) { 509 printf("warning: no search permission for one of the directories in path: %s\n", fname); 510 return 1; 511 } 512 perror(fname); 513 return 0; 514 } 515 if(!(S_ISDIR(buf.st_mode))) { 516 printf("%s is not a directory\n", fname); 517 return 0; 518 } 519 return 1; 520} 521 522/** get base dir of a fname */ 523static char* 524basedir(char* fname) 525{ 526 char* rev; 527 if(!fname) fatal_exit("out of memory"); 528 rev = strrchr(fname, '/'); 529 if(!rev) return NULL; 530 if(fname == rev) return NULL; 531 rev[0] = 0; 532 return fname; 533} 534 535/** check chroot for a file string */ 536static void 537check_chroot_string(const char* desc, char** ss, 538 const char* chrootdir, struct config_file* cfg) 539{ 540 char* str = *ss; 541 if(str && str[0]) { 542 *ss = fname_after_chroot(str, cfg, 1); 543 if(!*ss) fatal_exit("out of memory"); 544 if(!is_file(*ss)) { 545 if(chrootdir && chrootdir[0]) 546 fatal_exit("%s: \"%s\" does not exist in " 547 "chrootdir %s", desc, str, chrootdir); 548 else 549 fatal_exit("%s: \"%s\" does not exist", 550 desc, str); 551 } 552 /* put in a new full path for continued checking */ 553 free(str); 554 } 555} 556 557/** check file list, every file must be inside the chroot location */ 558static void 559check_chroot_filelist(const char* desc, struct config_strlist* list, 560 const char* chrootdir, struct config_file* cfg) 561{ 562 struct config_strlist* p; 563 for(p=list; p; p=p->next) { 564 check_chroot_string(desc, &p->str, chrootdir, cfg); 565 } 566} 567 568/** check file list, with wildcard processing */ 569static void 570check_chroot_filelist_wild(const char* desc, struct config_strlist* list, 571 const char* chrootdir, struct config_file* cfg) 572{ 573 struct config_strlist* p; 574 for(p=list; p; p=p->next) { 575#ifdef HAVE_GLOB 576 if(strchr(p->str, '*') || strchr(p->str, '[') || 577 strchr(p->str, '?') || strchr(p->str, '{') || 578 strchr(p->str, '~')) { 579 char* s = p->str; 580 /* adjust whole pattern for chroot and check later */ 581 p->str = fname_after_chroot(p->str, cfg, 1); 582 free(s); 583 } else 584#endif /* HAVE_GLOB */ 585 check_chroot_string(desc, &p->str, chrootdir, cfg); 586 } 587} 588 589#ifdef CLIENT_SUBNET 590/** check ECS configuration */ 591static void 592ecs_conf_checks(struct config_file* cfg) 593{ 594 struct ecs_whitelist* whitelist = NULL; 595 if(!(whitelist = ecs_whitelist_create())) 596 fatal_exit("Could not create ednssubnet whitelist: out of memory"); 597 if(!ecs_whitelist_apply_cfg(whitelist, cfg)) 598 fatal_exit("Could not setup ednssubnet whitelist"); 599 ecs_whitelist_delete(whitelist); 600} 601#endif /* CLIENT_SUBNET */ 602 603/** check that the modules exist, are compiled in */ 604static void 605check_modules_exist(const char* module_conf) 606{ 607 const char** names = module_list_avail(); 608 const char* s = module_conf; 609 while(*s) { 610 int i = 0; 611 int is_ok = 0; 612 while(*s && isspace((unsigned char)*s)) 613 s++; 614 if(!*s) break; 615 while(names[i]) { 616 if(strncmp(names[i], s, strlen(names[i])) == 0) { 617 is_ok = 1; 618 break; 619 } 620 i++; 621 } 622 if(is_ok == 0) { 623 char n[64]; 624 size_t j; 625 n[0]=0; 626 n[sizeof(n)-1]=0; 627 for(j=0; j<sizeof(n)-1; j++) { 628 if(!s[j] || isspace((unsigned char)s[j])) { 629 n[j] = 0; 630 break; 631 } 632 n[j] = s[j]; 633 } 634 fatal_exit("module_conf lists module '%s' but that " 635 "module is not available.", n); 636 } 637 s += strlen(names[i]); 638 } 639} 640 641/** check configuration for errors */ 642static void 643morechecks(struct config_file* cfg) 644{ 645 warn_hosts("stub-host", cfg->stubs); 646 warn_hosts("forward-host", cfg->forwards); 647 interfacechecks(cfg); 648 ifautomaticportschecks(cfg->if_automatic_ports); 649 aclchecks(cfg); 650 tcpconnlimitchecks(cfg); 651 652 if(cfg->verbosity < 0) 653 fatal_exit("verbosity value < 0"); 654 if(cfg->num_threads <= 0 || cfg->num_threads > 10000) 655 fatal_exit("num_threads value weird"); 656 if(!cfg->do_ip4 && !cfg->do_ip6) 657 fatal_exit("ip4 and ip6 are both disabled, pointless"); 658 if(!cfg->do_ip4 && cfg->prefer_ip4) 659 fatal_exit("cannot prefer and disable ip4, pointless"); 660 if(!cfg->do_ip6 && cfg->prefer_ip6) 661 fatal_exit("cannot prefer and disable ip6, pointless"); 662 if(!cfg->do_udp && !cfg->do_tcp) 663 fatal_exit("udp and tcp are both disabled, pointless"); 664 if(cfg->edns_buffer_size > cfg->msg_buffer_size) 665 fatal_exit("edns-buffer-size larger than msg-buffer-size, " 666 "answers will not fit in processing buffer"); 667#ifdef UB_ON_WINDOWS 668 w_config_adjust_directory(cfg); 669#endif 670 if(cfg->chrootdir && cfg->chrootdir[0] && 671 cfg->chrootdir[strlen(cfg->chrootdir)-1] == '/') 672 fatal_exit("chootdir %s has trailing slash '/' please remove.", 673 cfg->chrootdir); 674 if(cfg->chrootdir && cfg->chrootdir[0] && 675 !is_dir(cfg->chrootdir)) { 676 fatal_exit("bad chroot directory"); 677 } 678 if(cfg->directory && cfg->directory[0]) { 679 char* ad = fname_after_chroot(cfg->directory, cfg, 0); 680 if(!ad) fatal_exit("out of memory"); 681 if(!is_dir(ad)) fatal_exit("bad chdir directory"); 682 free(ad); 683 } 684 if( (cfg->chrootdir && cfg->chrootdir[0]) || 685 (cfg->directory && cfg->directory[0])) { 686 if(cfg->pidfile && cfg->pidfile[0]) { 687 char* ad = (cfg->pidfile[0]=='/')?strdup(cfg->pidfile): 688 fname_after_chroot(cfg->pidfile, cfg, 1); 689 char* bd = basedir(ad); 690 if(bd && !is_dir(bd)) 691 fatal_exit("pidfile directory does not exist"); 692 free(ad); 693 } 694 if(cfg->logfile && cfg->logfile[0]) { 695 char* ad = fname_after_chroot(cfg->logfile, cfg, 1); 696 char* bd = basedir(ad); 697 if(bd && !is_dir(bd)) 698 fatal_exit("logfile directory does not exist"); 699 free(ad); 700 } 701 } 702 703 check_chroot_filelist("file with root-hints", 704 cfg->root_hints, cfg->chrootdir, cfg); 705 check_chroot_filelist("trust-anchor-file", 706 cfg->trust_anchor_file_list, cfg->chrootdir, cfg); 707 check_chroot_filelist("auto-trust-anchor-file", 708 cfg->auto_trust_anchor_file_list, cfg->chrootdir, cfg); 709 check_chroot_filelist_wild("trusted-keys-file", 710 cfg->trusted_keys_file_list, cfg->chrootdir, cfg); 711 if(cfg->disable_edns_do && strstr(cfg->module_conf, "validator") 712 && (cfg->trust_anchor_file_list 713 || cfg->trust_anchor_list 714 || cfg->auto_trust_anchor_file_list 715 || cfg->trusted_keys_file_list)) { 716 char* key = NULL; 717 if(cfg->auto_trust_anchor_file_list) 718 key = cfg->auto_trust_anchor_file_list->str; 719 if(!key && cfg->trust_anchor_file_list) 720 key = cfg->trust_anchor_file_list->str; 721 if(!key && cfg->trust_anchor_list) 722 key = cfg->trust_anchor_list->str; 723 if(!key && cfg->trusted_keys_file_list) 724 key = cfg->trusted_keys_file_list->str; 725 if(!key) key = ""; 726 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); 727 } 728#ifdef USE_IPSECMOD 729 if(cfg->ipsecmod_enabled && strstr(cfg->module_conf, "ipsecmod")) { 730 /* only check hook if enabled */ 731 check_chroot_string("ipsecmod-hook", &cfg->ipsecmod_hook, 732 cfg->chrootdir, cfg); 733 } 734#endif 735 /* remove chroot setting so that modules are not stripping pathnames */ 736 free(cfg->chrootdir); 737 cfg->chrootdir = NULL; 738 739 /* check that the modules listed in module_conf exist */ 740 check_modules_exist(cfg->module_conf); 741 742 /* Respip is known to *not* work with dns64. */ 743 if(strcmp(cfg->module_conf, "iterator") != 0 744 && strcmp(cfg->module_conf, "validator iterator") != 0 745 && strcmp(cfg->module_conf, "dns64 validator iterator") != 0 746 && strcmp(cfg->module_conf, "dns64 iterator") != 0 747 && strcmp(cfg->module_conf, "respip iterator") != 0 748 && strcmp(cfg->module_conf, "respip validator iterator") != 0 749 && strcmp(cfg->module_conf, "respip dns64 validator iterator") != 0 750 && strcmp(cfg->module_conf, "respip dns64 iterator") != 0 751#ifdef WITH_PYTHONMODULE 752 && strcmp(cfg->module_conf, "python iterator") != 0 753 && strcmp(cfg->module_conf, "python respip iterator") != 0 754 && strcmp(cfg->module_conf, "python validator iterator") != 0 755 && strcmp(cfg->module_conf, "python respip validator iterator") != 0 756 && strcmp(cfg->module_conf, "validator python iterator") != 0 757 && strcmp(cfg->module_conf, "dns64 python iterator") != 0 758 && strcmp(cfg->module_conf, "dns64 python validator iterator") != 0 759 && strcmp(cfg->module_conf, "dns64 validator python iterator") != 0 760 && strcmp(cfg->module_conf, "python dns64 iterator") != 0 761 && strcmp(cfg->module_conf, "python dns64 validator iterator") != 0 762#endif 763#ifdef WITH_DYNLIBMODULE 764 && strcmp(cfg->module_conf, "dynlib iterator") != 0 765 && strcmp(cfg->module_conf, "dynlib dynlib iterator") != 0 766 && strcmp(cfg->module_conf, "dynlib dynlib dynlib iterator") != 0 767 && strcmp(cfg->module_conf, "python dynlib iterator") != 0 768 && strcmp(cfg->module_conf, "python dynlib dynlib iterator") != 0 769 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib iterator") != 0 770 && strcmp(cfg->module_conf, "dynlib respip iterator") != 0 771 && strcmp(cfg->module_conf, "dynlib validator iterator") != 0 772 && strcmp(cfg->module_conf, "dynlib dynlib validator iterator") != 0 773 && strcmp(cfg->module_conf, "dynlib dynlib dynlib validator iterator") != 0 774 && strcmp(cfg->module_conf, "python dynlib validator iterator") != 0 775 && strcmp(cfg->module_conf, "python dynlib dynlib validator iterator") != 0 776 && strcmp(cfg->module_conf, "python dynlib dynlib dynlib validator iterator") != 0 777 && strcmp(cfg->module_conf, "dynlib respip validator iterator") != 0 778 && strcmp(cfg->module_conf, "validator dynlib iterator") != 0 779 && strcmp(cfg->module_conf, "dns64 dynlib iterator") != 0 780 && strcmp(cfg->module_conf, "dns64 dynlib validator iterator") != 0 781 && strcmp(cfg->module_conf, "dns64 validator dynlib iterator") != 0 782 && strcmp(cfg->module_conf, "dynlib dns64 iterator") != 0 783 && strcmp(cfg->module_conf, "dynlib dns64 validator iterator") != 0 784 && strcmp(cfg->module_conf, "dynlib dns64 cachedb iterator") != 0 785 && strcmp(cfg->module_conf, "dynlib dns64 validator cachedb iterator") != 0 786 && strcmp(cfg->module_conf, "dns64 dynlib cachedb iterator") != 0 787 && strcmp(cfg->module_conf, "dns64 dynlib validator cachedb iterator") != 0 788 && strcmp(cfg->module_conf, "dynlib cachedb iterator") != 0 789 && strcmp(cfg->module_conf, "dynlib respip cachedb iterator") != 0 790 && strcmp(cfg->module_conf, "dynlib validator cachedb iterator") != 0 791 && strcmp(cfg->module_conf, "dynlib respip validator cachedb iterator") != 0 792 && strcmp(cfg->module_conf, "cachedb dynlib iterator") != 0 793 && strcmp(cfg->module_conf, "respip cachedb dynlib iterator") != 0 794 && strcmp(cfg->module_conf, "validator cachedb dynlib iterator") != 0 795 && strcmp(cfg->module_conf, "respip validator cachedb dynlib iterator") != 0 796 && strcmp(cfg->module_conf, "validator dynlib cachedb iterator") != 0 797 && strcmp(cfg->module_conf, "respip validator dynlib cachedb iterator") != 0 798 && strcmp(cfg->module_conf, "dynlib subnetcache iterator") != 0 799 && strcmp(cfg->module_conf, "dynlib respip subnetcache iterator") != 0 800 && strcmp(cfg->module_conf, "subnetcache dynlib iterator") != 0 801 && strcmp(cfg->module_conf, "respip subnetcache dynlib iterator") != 0 802 && strcmp(cfg->module_conf, "dynlib subnetcache validator iterator") != 0 803 && strcmp(cfg->module_conf, "dynlib respip subnetcache validator iterator") != 0 804 && strcmp(cfg->module_conf, "subnetcache dynlib validator iterator") != 0 805 && strcmp(cfg->module_conf, "respip subnetcache dynlib validator iterator") != 0 806 && strcmp(cfg->module_conf, "subnetcache validator dynlib iterator") != 0 807 && strcmp(cfg->module_conf, "respip subnetcache validator dynlib iterator") != 0 808 && strcmp(cfg->module_conf, "dynlib ipsecmod iterator") != 0 809 && strcmp(cfg->module_conf, "dynlib ipsecmod respip iterator") != 0 810 && strcmp(cfg->module_conf, "ipsecmod dynlib iterator") != 0 811 && strcmp(cfg->module_conf, "ipsecmod dynlib respip iterator") != 0 812 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 813 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 814 && strcmp(cfg->module_conf, "dynlib ipsecmod validator iterator") != 0 815 && strcmp(cfg->module_conf, "dynlib ipsecmod respip validator iterator") != 0 816 && strcmp(cfg->module_conf, "ipsecmod dynlib validator iterator") != 0 817 && strcmp(cfg->module_conf, "ipsecmod dynlib respip validator iterator") != 0 818 && strcmp(cfg->module_conf, "ipsecmod validator dynlib iterator") != 0 819 && strcmp(cfg->module_conf, "ipsecmod respip validator dynlib iterator") != 0 820#endif 821#ifdef USE_CACHEDB 822 && strcmp(cfg->module_conf, "validator cachedb iterator") != 0 823 && strcmp(cfg->module_conf, "respip validator cachedb iterator") != 0 824 && strcmp(cfg->module_conf, "cachedb iterator") != 0 825 && strcmp(cfg->module_conf, "respip cachedb iterator") != 0 826 && strcmp(cfg->module_conf, "dns64 validator cachedb iterator") != 0 827 && strcmp(cfg->module_conf, "dns64 cachedb iterator") != 0 828#endif 829#if defined(WITH_PYTHONMODULE) && defined(USE_CACHEDB) 830 && strcmp(cfg->module_conf, "python dns64 cachedb iterator") != 0 831 && strcmp(cfg->module_conf, "python dns64 validator cachedb iterator") != 0 832 && strcmp(cfg->module_conf, "dns64 python cachedb iterator") != 0 833 && strcmp(cfg->module_conf, "dns64 python validator cachedb iterator") != 0 834 && strcmp(cfg->module_conf, "python cachedb iterator") != 0 835 && strcmp(cfg->module_conf, "python respip cachedb iterator") != 0 836 && strcmp(cfg->module_conf, "python validator cachedb iterator") != 0 837 && strcmp(cfg->module_conf, "python respip validator cachedb iterator") != 0 838 && strcmp(cfg->module_conf, "cachedb python iterator") != 0 839 && strcmp(cfg->module_conf, "respip cachedb python iterator") != 0 840 && strcmp(cfg->module_conf, "validator cachedb python iterator") != 0 841 && strcmp(cfg->module_conf, "respip validator cachedb python iterator") != 0 842 && strcmp(cfg->module_conf, "validator python cachedb iterator") != 0 843 && strcmp(cfg->module_conf, "respip validator python cachedb iterator") != 0 844#endif 845#if defined(CLIENT_SUBNET) && defined(USE_CACHEDB) 846 && strcmp(cfg->module_conf, "respip subnetcache validator cachedb iterator") != 0 847 && strcmp(cfg->module_conf, "subnetcache validator cachedb iterator") != 0 848#endif 849#ifdef CLIENT_SUBNET 850 && strcmp(cfg->module_conf, "subnetcache iterator") != 0 851 && strcmp(cfg->module_conf, "respip subnetcache iterator") != 0 852 && strcmp(cfg->module_conf, "subnetcache validator iterator") != 0 853 && strcmp(cfg->module_conf, "respip subnetcache validator iterator") != 0 854 && strcmp(cfg->module_conf, "dns64 subnetcache iterator") != 0 855 && strcmp(cfg->module_conf, "dns64 subnetcache validator iterator") != 0 856 && strcmp(cfg->module_conf, "dns64 subnetcache respip iterator") != 0 857 && strcmp(cfg->module_conf, "dns64 subnetcache respip validator iterator") != 0 858#endif 859#if defined(WITH_PYTHONMODULE) && defined(CLIENT_SUBNET) 860 && strcmp(cfg->module_conf, "python subnetcache iterator") != 0 861 && strcmp(cfg->module_conf, "python respip subnetcache iterator") != 0 862 && strcmp(cfg->module_conf, "subnetcache python iterator") != 0 863 && strcmp(cfg->module_conf, "respip subnetcache python iterator") != 0 864 && strcmp(cfg->module_conf, "python subnetcache validator iterator") != 0 865 && strcmp(cfg->module_conf, "python respip subnetcache validator iterator") != 0 866 && strcmp(cfg->module_conf, "subnetcache python validator iterator") != 0 867 && strcmp(cfg->module_conf, "respip subnetcache python validator iterator") != 0 868 && strcmp(cfg->module_conf, "subnetcache validator python iterator") != 0 869 && strcmp(cfg->module_conf, "respip subnetcache validator python iterator") != 0 870#endif 871#ifdef USE_IPSECMOD 872 && strcmp(cfg->module_conf, "ipsecmod iterator") != 0 873 && strcmp(cfg->module_conf, "ipsecmod respip iterator") != 0 874 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 875 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 876#endif 877#if defined(WITH_PYTHONMODULE) && defined(USE_IPSECMOD) 878 && strcmp(cfg->module_conf, "python ipsecmod iterator") != 0 879 && strcmp(cfg->module_conf, "python ipsecmod respip iterator") != 0 880 && strcmp(cfg->module_conf, "ipsecmod python iterator") != 0 881 && strcmp(cfg->module_conf, "ipsecmod python respip iterator") != 0 882 && strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0 883 && strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0 884 && strcmp(cfg->module_conf, "python ipsecmod validator iterator") != 0 885 && strcmp(cfg->module_conf, "python ipsecmod respip validator iterator") != 0 886 && strcmp(cfg->module_conf, "ipsecmod python validator iterator") != 0 887 && strcmp(cfg->module_conf, "ipsecmod python respip validator iterator") != 0 888 && strcmp(cfg->module_conf, "ipsecmod validator python iterator") != 0 889 && strcmp(cfg->module_conf, "ipsecmod respip validator python iterator") != 0 890#endif 891#ifdef USE_IPSET 892 && strcmp(cfg->module_conf, "validator ipset iterator") != 0 893 && strcmp(cfg->module_conf, "validator ipset respip iterator") != 0 894 && strcmp(cfg->module_conf, "ipset iterator") != 0 895 && strcmp(cfg->module_conf, "ipset respip iterator") != 0 896#endif 897 ) { 898 fatal_exit("module conf '%s' is not known to work", 899 cfg->module_conf); 900 } 901 902#ifdef HAVE_GETPWNAM 903 if(cfg->username && cfg->username[0]) { 904 if(getpwnam(cfg->username) == NULL) 905 fatal_exit("user '%s' does not exist.", cfg->username); 906# ifdef HAVE_ENDPWENT 907 endpwent(); 908# endif 909 } 910#endif 911 if(cfg->remote_control_enable && options_remote_is_address(cfg) 912 && cfg->control_use_cert) { 913 check_chroot_string("server-key-file", &cfg->server_key_file, 914 cfg->chrootdir, cfg); 915 check_chroot_string("server-cert-file", &cfg->server_cert_file, 916 cfg->chrootdir, cfg); 917 if(!is_file(cfg->control_key_file)) 918 fatal_exit("control-key-file: \"%s\" does not exist", 919 cfg->control_key_file); 920 if(!is_file(cfg->control_cert_file)) 921 fatal_exit("control-cert-file: \"%s\" does not exist", 922 cfg->control_cert_file); 923 } 924 925 donotquerylocalhostcheck(cfg); 926 localzonechecks(cfg); 927 view_and_respipchecks(cfg); 928#ifdef CLIENT_SUBNET 929 ecs_conf_checks(cfg); 930#endif 931} 932 933/** check forwards */ 934static void 935check_fwd(struct config_file* cfg) 936{ 937 struct iter_forwards* fwd = forwards_create(); 938 if(!fwd || !forwards_apply_cfg(fwd, cfg)) { 939 fatal_exit("Could not set forward zones"); 940 } 941 forwards_delete(fwd); 942} 943 944/** check hints */ 945static void 946check_hints(struct config_file* cfg) 947{ 948 struct iter_hints* hints = hints_create(); 949 if(!hints || !hints_apply_cfg(hints, cfg)) { 950 fatal_exit("Could not set root or stub hints"); 951 } 952 hints_delete(hints); 953} 954 955/** check auth zones */ 956static void 957check_auth(struct config_file* cfg) 958{ 959 int is_rpz = 0; 960 struct auth_zones* az = auth_zones_create(); 961 if(!az || !auth_zones_apply_cfg(az, cfg, 0, &is_rpz, NULL, NULL)) { 962 fatal_exit("Could not setup authority zones"); 963 } 964 auth_zones_delete(az); 965} 966 967/** check config file */ 968static void 969checkconf(const char* cfgfile, const char* opt, int final, int quiet) 970{ 971 char oldwd[4096]; 972 struct config_file* cfg = config_create(); 973 if(!cfg) 974 fatal_exit("out of memory"); 975 oldwd[0] = 0; 976 if(!getcwd(oldwd, sizeof(oldwd))) { 977 log_err("cannot getcwd: %s", strerror(errno)); 978 oldwd[0] = 0; 979 } 980 if(!config_read(cfg, cfgfile, NULL)) { 981 /* config_read prints messages to stderr */ 982 config_delete(cfg); 983 exit(1); 984 } 985 if(oldwd[0] && chdir(oldwd) == -1) 986 log_err("cannot chdir(%s): %s", oldwd, strerror(errno)); 987 if(opt) { 988 print_option(cfg, opt, final); 989 config_delete(cfg); 990 return; 991 } 992 morechecks(cfg); 993 check_mod(cfg, iter_get_funcblock()); 994 check_mod(cfg, val_get_funcblock()); 995#ifdef WITH_PYTHONMODULE 996 if(strstr(cfg->module_conf, "python")) 997 check_mod(cfg, pythonmod_get_funcblock()); 998#endif 999 check_fwd(cfg); 1000 check_hints(cfg); 1001 check_auth(cfg); 1002 if(!quiet) { printf("unbound-checkconf: no errors in %s\n", cfgfile); } 1003 config_delete(cfg); 1004} 1005 1006/** getopt global, in case header files fail to declare it. */ 1007extern int optind; 1008/** getopt global, in case header files fail to declare it. */ 1009extern char* optarg; 1010 1011/** Main routine for checkconf */ 1012int main(int argc, char* argv[]) 1013{ 1014 int c; 1015 int final = 0; 1016 int quiet = 0; 1017 const char* f; 1018 const char* opt = NULL; 1019 const char* cfgfile = CONFIGFILE; 1020 checklock_start(); 1021 log_ident_set("unbound-checkconf"); 1022 log_init(NULL, 0, NULL); 1023#ifdef USE_WINSOCK 1024 /* use registry config file in preference to compiletime location */ 1025 if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile"))) 1026 cfgfile = CONFIGFILE; 1027#endif /* USE_WINSOCK */ 1028 /* parse the options */ 1029 while( (c=getopt(argc, argv, "fhqo:")) != -1) { 1030 switch(c) { 1031 case 'f': 1032 final = 1; 1033 break; 1034 case 'o': 1035 opt = optarg; 1036 break; 1037 case 'q': 1038 quiet = 1; 1039 break; 1040 case '?': 1041 case 'h': 1042 default: 1043 usage(); 1044 } 1045 } 1046 argc -= optind; 1047 argv += optind; 1048 if(argc != 0 && argc != 1) 1049 usage(); 1050 if(argc == 1) 1051 f = argv[0]; 1052 else f = cfgfile; 1053 checkconf(f, opt, final, quiet); 1054 checklock_stop(); 1055 return 0; 1056} 1057