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