1 /*
2 * util/config_file.c - reads and stores the config file for unbound.
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 * This file contains functions for the config file.
40 */
41
42 #include "config.h"
43 #include <ctype.h>
44 #include <stdarg.h>
45 #ifdef HAVE_TIME_H
46 #include <time.h>
47 #endif
48 #include "util/log.h"
49 #include "util/configyyrename.h"
50 #include "util/config_file.h"
51 #include "configparser.h"
52 #include "util/net_help.h"
53 #include "util/data/msgparse.h"
54 #include "util/module.h"
55 #include "util/regional.h"
56 #include "util/fptr_wlist.h"
57 #include "util/data/dname.h"
58 #include "util/random.h"
59 #include "util/rtt.h"
60 #include "services/cache/infra.h"
61 #include "sldns/wire2str.h"
62 #include "sldns/parseutil.h"
63 #include "iterator/iterator.h"
64 #ifdef HAVE_GLOB_H
65 # include <glob.h>
66 #endif
67 #ifdef CLIENT_SUBNET
68 #include "edns-subnet/edns-subnet.h"
69 #endif
70 #ifdef HAVE_PWD_H
71 #include <pwd.h>
72 #endif
73
74 /** from cfg username, after daemonize setup performed */
75 uid_t cfg_uid = (uid_t)-1;
76 /** from cfg username, after daemonize setup performed */
77 gid_t cfg_gid = (gid_t)-1;
78 /** for debug allow small timeout values for fast rollovers */
79 int autr_permit_small_holddown = 0;
80 /** size (in bytes) of stream wait buffers max */
81 size_t stream_wait_max = 4 * 1024 * 1024;
82 size_t http2_query_buffer_max = 4 * 1024 * 1024;
83 size_t http2_response_buffer_max = 4 * 1024 * 1024;
84
85 /** global config during parsing */
86 struct config_parser_state* cfg_parser = 0;
87
88 /** init ports possible for use */
89 static void init_outgoing_availports(int* array, int num);
90
91 /** init cookie with random data */
92 static void init_cookie_secret(uint8_t* cookie_secret, size_t cookie_secret_len);
93
94 struct config_file*
config_create(void)95 config_create(void)
96 {
97 struct config_file* cfg;
98 cfg = (struct config_file*)calloc(1, sizeof(struct config_file));
99 if(!cfg)
100 return NULL;
101 /* the defaults if no config is present */
102 cfg->verbosity = 1;
103 cfg->stat_interval = 0;
104 cfg->stat_cumulative = 0;
105 cfg->stat_extended = 0;
106 cfg->stat_inhibit_zero = 1;
107 cfg->num_threads = 1;
108 cfg->port = UNBOUND_DNS_PORT;
109 cfg->do_ip4 = 1;
110 cfg->do_ip6 = 1;
111 cfg->do_udp = 1;
112 cfg->do_tcp = 1;
113 cfg->tcp_reuse_timeout = 60 * 1000; /* 60s in milisecs */
114 cfg->max_reuse_tcp_queries = 200;
115 cfg->tcp_upstream = 0;
116 cfg->udp_upstream_without_downstream = 0;
117 cfg->tcp_mss = 0;
118 cfg->outgoing_tcp_mss = 0;
119 cfg->tcp_idle_timeout = 30 * 1000; /* 30s in millisecs */
120 cfg->tcp_auth_query_timeout = 3 * 1000; /* 3s in millisecs */
121 cfg->do_tcp_keepalive = 0;
122 cfg->tcp_keepalive_timeout = 120 * 1000; /* 120s in millisecs */
123 cfg->sock_queue_timeout = 0; /* do not check timeout */
124 cfg->ssl_service_key = NULL;
125 cfg->ssl_service_pem = NULL;
126 cfg->ssl_port = UNBOUND_DNS_OVER_TLS_PORT;
127 cfg->ssl_upstream = 0;
128 cfg->tls_cert_bundle = NULL;
129 cfg->tls_win_cert = 0;
130 cfg->tls_use_sni = 1;
131 cfg->https_port = UNBOUND_DNS_OVER_HTTPS_PORT;
132 if(!(cfg->http_endpoint = strdup("/dns-query"))) goto error_exit;
133 cfg->http_max_streams = 100;
134 cfg->http_query_buffer_size = 4*1024*1024;
135 cfg->http_response_buffer_size = 4*1024*1024;
136 cfg->http_nodelay = 1;
137 cfg->use_syslog = 1;
138 cfg->log_identity = NULL; /* changed later with argv[0] */
139 cfg->log_time_ascii = 0;
140 cfg->log_queries = 0;
141 cfg->log_replies = 0;
142 cfg->log_tag_queryreply = 0;
143 cfg->log_local_actions = 0;
144 cfg->log_servfail = 0;
145 cfg->log_destaddr = 0;
146 #ifndef USE_WINSOCK
147 # ifdef USE_MINI_EVENT
148 /* select max 1024 sockets */
149 cfg->outgoing_num_ports = 960;
150 cfg->num_queries_per_thread = 512;
151 # else
152 /* libevent can use many sockets */
153 cfg->outgoing_num_ports = 4096;
154 cfg->num_queries_per_thread = 1024;
155 # endif
156 cfg->outgoing_num_tcp = 10;
157 cfg->incoming_num_tcp = 10;
158 #else
159 cfg->outgoing_num_ports = 48; /* windows is limited in num fds */
160 cfg->num_queries_per_thread = 24;
161 cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */
162 cfg->incoming_num_tcp = 2;
163 #endif
164 cfg->stream_wait_size = 4 * 1024 * 1024;
165 cfg->edns_buffer_size = 1232; /* from DNS flagday recommendation */
166 cfg->msg_buffer_size = 65552; /* 64 k + a small margin */
167 cfg->msg_cache_size = 4 * 1024 * 1024;
168 cfg->msg_cache_slabs = 4;
169 cfg->jostle_time = 200;
170 cfg->rrset_cache_size = 4 * 1024 * 1024;
171 cfg->rrset_cache_slabs = 4;
172 cfg->host_ttl = 900;
173 cfg->bogus_ttl = 60;
174 cfg->min_ttl = 0;
175 cfg->max_ttl = 3600 * 24;
176 cfg->max_negative_ttl = 3600;
177 cfg->min_negative_ttl = 0;
178 cfg->prefetch = 0;
179 cfg->prefetch_key = 0;
180 cfg->deny_any = 0;
181 cfg->infra_cache_slabs = 4;
182 cfg->infra_cache_numhosts = 10000;
183 cfg->infra_cache_min_rtt = 50;
184 cfg->infra_cache_max_rtt = 120000;
185 cfg->infra_keep_probing = 0;
186 cfg->delay_close = 0;
187 cfg->udp_connect = 1;
188 if(!(cfg->outgoing_avail_ports = (int*)calloc(65536, sizeof(int))))
189 goto error_exit;
190 init_outgoing_availports(cfg->outgoing_avail_ports, 65536);
191 if(!(cfg->username = strdup(UB_USERNAME))) goto error_exit;
192 #ifdef HAVE_CHROOT
193 if(!(cfg->chrootdir = strdup(CHROOT_DIR))) goto error_exit;
194 #endif
195 if(!(cfg->directory = strdup(RUN_DIR))) goto error_exit;
196 if(!(cfg->logfile = strdup(""))) goto error_exit;
197 if(!(cfg->pidfile = strdup(PIDFILE))) goto error_exit;
198 if(!(cfg->target_fetch_policy = strdup("3 2 1 0 0"))) goto error_exit;
199 cfg->fast_server_permil = 0;
200 cfg->fast_server_num = 3;
201 cfg->donotqueryaddrs = NULL;
202 cfg->donotquery_localhost = 1;
203 cfg->root_hints = NULL;
204 cfg->use_systemd = 0;
205 cfg->do_daemonize = 1;
206 cfg->if_automatic = 0;
207 cfg->if_automatic_ports = NULL;
208 cfg->so_rcvbuf = 0;
209 cfg->so_sndbuf = 0;
210 cfg->so_reuseport = REUSEPORT_DEFAULT;
211 cfg->ip_transparent = 0;
212 cfg->ip_freebind = 0;
213 cfg->ip_dscp = 0;
214 cfg->num_ifs = 0;
215 cfg->ifs = NULL;
216 cfg->num_out_ifs = 0;
217 cfg->out_ifs = NULL;
218 cfg->stubs = NULL;
219 cfg->forwards = NULL;
220 cfg->auths = NULL;
221 #ifdef CLIENT_SUBNET
222 cfg->client_subnet = NULL;
223 cfg->client_subnet_zone = NULL;
224 cfg->client_subnet_opcode = LDNS_EDNS_CLIENT_SUBNET;
225 cfg->client_subnet_always_forward = 0;
226 cfg->max_client_subnet_ipv4 = 24;
227 cfg->max_client_subnet_ipv6 = 56;
228 cfg->min_client_subnet_ipv4 = 0;
229 cfg->min_client_subnet_ipv6 = 0;
230 cfg->max_ecs_tree_size_ipv4 = 100;
231 cfg->max_ecs_tree_size_ipv6 = 100;
232 #endif
233 cfg->views = NULL;
234 cfg->acls = NULL;
235 cfg->tcp_connection_limits = NULL;
236 cfg->harden_short_bufsize = 1;
237 cfg->harden_large_queries = 0;
238 cfg->harden_glue = 1;
239 cfg->harden_dnssec_stripped = 1;
240 cfg->harden_below_nxdomain = 1;
241 cfg->harden_referral_path = 0;
242 cfg->harden_algo_downgrade = 0;
243 cfg->harden_unknown_additional = 0;
244 cfg->use_caps_bits_for_id = 0;
245 cfg->caps_whitelist = NULL;
246 cfg->private_address = NULL;
247 cfg->private_domain = NULL;
248 cfg->unwanted_threshold = 0;
249 cfg->hide_identity = 0;
250 cfg->hide_version = 0;
251 cfg->hide_trustanchor = 0;
252 cfg->hide_http_user_agent = 0;
253 cfg->identity = NULL;
254 cfg->version = NULL;
255 cfg->http_user_agent = NULL;
256 cfg->nsid_cfg_str = NULL;
257 cfg->nsid = NULL;
258 cfg->nsid_len = 0;
259 cfg->auto_trust_anchor_file_list = NULL;
260 cfg->trust_anchor_file_list = NULL;
261 cfg->trust_anchor_list = NULL;
262 cfg->trusted_keys_file_list = NULL;
263 cfg->trust_anchor_signaling = 1;
264 cfg->root_key_sentinel = 1;
265 cfg->domain_insecure = NULL;
266 cfg->val_date_override = 0;
267 cfg->val_sig_skew_min = 3600; /* at least daylight savings trouble */
268 cfg->val_sig_skew_max = 86400; /* at most timezone settings trouble */
269 cfg->val_max_restart = 5;
270 cfg->val_clean_additional = 1;
271 cfg->val_log_level = 0;
272 cfg->val_log_squelch = 0;
273 cfg->val_permissive_mode = 0;
274 cfg->aggressive_nsec = 1;
275 cfg->ignore_cd = 0;
276 cfg->disable_edns_do = 0;
277 cfg->serve_expired = 0;
278 cfg->serve_expired_ttl = 0;
279 cfg->serve_expired_ttl_reset = 0;
280 cfg->serve_expired_reply_ttl = 30;
281 cfg->serve_expired_client_timeout = 0;
282 cfg->ede_serve_expired = 0;
283 cfg->serve_original_ttl = 0;
284 cfg->zonemd_permissive_mode = 0;
285 cfg->add_holddown = 30*24*3600;
286 cfg->del_holddown = 30*24*3600;
287 cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */
288 cfg->permit_small_holddown = 0;
289 cfg->key_cache_size = 4 * 1024 * 1024;
290 cfg->key_cache_slabs = 4;
291 cfg->neg_cache_size = 1 * 1024 * 1024;
292 cfg->local_zones = NULL;
293 cfg->local_zones_nodefault = NULL;
294 #ifdef USE_IPSET
295 cfg->local_zones_ipset = NULL;
296 #endif
297 cfg->local_zones_disable_default = 0;
298 cfg->local_data = NULL;
299 cfg->local_zone_overrides = NULL;
300 cfg->unblock_lan_zones = 0;
301 cfg->insecure_lan_zones = 0;
302 cfg->python_script = NULL;
303 cfg->dynlib_file = NULL;
304 cfg->remote_control_enable = 0;
305 cfg->control_ifs.first = NULL;
306 cfg->control_ifs.last = NULL;
307 cfg->control_port = UNBOUND_CONTROL_PORT;
308 cfg->control_use_cert = 1;
309 cfg->minimal_responses = 1;
310 cfg->rrset_roundrobin = 1;
311 cfg->unknown_server_time_limit = 376;
312 cfg->discard_timeout = 1900; /* msec */
313 cfg->wait_limit = 1000;
314 cfg->wait_limit_cookie = 10000;
315 cfg->wait_limit_netblock = NULL;
316 cfg->wait_limit_cookie_netblock = NULL;
317 cfg->max_udp_size = 1232; /* value taken from edns_buffer_size */
318 if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key")))
319 goto error_exit;
320 if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem")))
321 goto error_exit;
322 if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key")))
323 goto error_exit;
324 if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem")))
325 goto error_exit;
326
327 #ifdef CLIENT_SUBNET
328 if(!(cfg->module_conf = strdup("subnetcache validator iterator"))) goto error_exit;
329 #else
330 if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit;
331 #endif
332 if(!(cfg->val_nsec3_key_iterations =
333 strdup("1024 150 2048 150 4096 150"))) goto error_exit;
334 #if defined(DNSTAP_SOCKET_PATH)
335 if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH)))
336 goto error_exit;
337 #endif
338 cfg->dnstap_bidirectional = 1;
339 cfg->dnstap_tls = 1;
340 cfg->disable_dnssec_lame_check = 0;
341 cfg->ip_ratelimit_cookie = 0;
342 cfg->ip_ratelimit = 0;
343 cfg->ratelimit = 0;
344 cfg->ip_ratelimit_slabs = 4;
345 cfg->ratelimit_slabs = 4;
346 cfg->ip_ratelimit_size = 4*1024*1024;
347 cfg->ratelimit_size = 4*1024*1024;
348 cfg->ratelimit_for_domain = NULL;
349 cfg->ratelimit_below_domain = NULL;
350 cfg->ip_ratelimit_factor = 10;
351 cfg->ratelimit_factor = 10;
352 cfg->ip_ratelimit_backoff = 0;
353 cfg->ratelimit_backoff = 0;
354 cfg->outbound_msg_retry = 5;
355 cfg->max_sent_count = 32;
356 cfg->max_query_restarts = 11;
357 cfg->qname_minimisation = 1;
358 cfg->qname_minimisation_strict = 0;
359 cfg->shm_enable = 0;
360 cfg->shm_key = 11777;
361 cfg->edns_client_strings = NULL;
362 cfg->edns_client_string_opcode = 65001;
363 cfg->dnscrypt = 0;
364 cfg->dnscrypt_port = 0;
365 cfg->dnscrypt_provider = NULL;
366 cfg->dnscrypt_provider_cert = NULL;
367 cfg->dnscrypt_provider_cert_rotated = NULL;
368 cfg->dnscrypt_secret_key = NULL;
369 cfg->dnscrypt_shared_secret_cache_size = 4*1024*1024;
370 cfg->dnscrypt_shared_secret_cache_slabs = 4;
371 cfg->dnscrypt_nonce_cache_size = 4*1024*1024;
372 cfg->dnscrypt_nonce_cache_slabs = 4;
373 cfg->pad_responses = 1;
374 cfg->pad_responses_block_size = 468; /* from RFC8467 */
375 cfg->pad_queries = 1;
376 cfg->pad_queries_block_size = 128; /* from RFC8467 */
377 #ifdef USE_IPSECMOD
378 cfg->ipsecmod_enabled = 1;
379 cfg->ipsecmod_ignore_bogus = 0;
380 cfg->ipsecmod_hook = NULL;
381 cfg->ipsecmod_max_ttl = 3600;
382 cfg->ipsecmod_whitelist = NULL;
383 cfg->ipsecmod_strict = 0;
384 #endif
385 cfg->do_answer_cookie = 0;
386 memset(cfg->cookie_secret, 0, sizeof(cfg->cookie_secret));
387 cfg->cookie_secret_len = 16;
388 init_cookie_secret(cfg->cookie_secret, cfg->cookie_secret_len);
389 #ifdef USE_CACHEDB
390 if(!(cfg->cachedb_backend = strdup("testframe"))) goto error_exit;
391 if(!(cfg->cachedb_secret = strdup("default"))) goto error_exit;
392 cfg->cachedb_no_store = 0;
393 cfg->cachedb_check_when_serve_expired = 1;
394 #ifdef USE_REDIS
395 if(!(cfg->redis_server_host = strdup("127.0.0.1"))) goto error_exit;
396 cfg->redis_server_path = NULL;
397 cfg->redis_server_password = NULL;
398 cfg->redis_timeout = 100;
399 cfg->redis_server_port = 6379;
400 cfg->redis_expire_records = 0;
401 cfg->redis_logical_db = 0;
402 #endif /* USE_REDIS */
403 #endif /* USE_CACHEDB */
404 #ifdef USE_IPSET
405 cfg->ipset_name_v4 = NULL;
406 cfg->ipset_name_v6 = NULL;
407 #endif
408 cfg->ede = 0;
409 return cfg;
410 error_exit:
411 config_delete(cfg);
412 return NULL;
413 }
414
config_create_forlib(void)415 struct config_file* config_create_forlib(void)
416 {
417 struct config_file* cfg = config_create();
418 if(!cfg) return NULL;
419 /* modifications for library use, less verbose, less memory */
420 free(cfg->chrootdir);
421 cfg->chrootdir = NULL;
422 cfg->verbosity = 0;
423 cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable'
424 and probably within the ulimit(maxfds) of the user */
425 cfg->outgoing_num_tcp = 2;
426 cfg->msg_cache_size = 1024*1024;
427 cfg->msg_cache_slabs = 1;
428 cfg->rrset_cache_size = 1024*1024;
429 cfg->rrset_cache_slabs = 1;
430 cfg->infra_cache_slabs = 1;
431 cfg->use_syslog = 0;
432 cfg->key_cache_size = 1024*1024;
433 cfg->key_cache_slabs = 1;
434 cfg->neg_cache_size = 100 * 1024;
435 cfg->donotquery_localhost = 0; /* allow, so that you can ask a
436 forward nameserver running on localhost */
437 cfg->val_log_level = 2; /* to fill why_bogus with */
438 cfg->val_log_squelch = 1;
439 cfg->minimal_responses = 0;
440 cfg->harden_short_bufsize = 1;
441 return cfg;
442 }
443
444 /** check that the value passed is >= 0 */
445 #define IS_NUMBER_OR_ZERO \
446 if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0
447 /** check that the value passed is > 0 */
448 #define IS_NONZERO_NUMBER \
449 if(atoi(val) == 0) return 0
450 /** check that the value passed is not 0 and a power of 2 */
451 #define IS_POW2_NUMBER \
452 if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0
453 /** check that the value passed is yes or no */
454 #define IS_YES_OR_NO \
455 if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0
456 /** put integer_or_zero into variable */
457 #define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
458 { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); }
459 /** put integer_nonzero into variable */
460 #define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \
461 { IS_NONZERO_NUMBER; cfg->var = atoi(val); }
462 /** put integer_or_zero into unsigned */
463 #define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
464 { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); }
465 /** put integer_or_zero into size_t */
466 #define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
467 { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); }
468 /** put integer_nonzero into size_t */
469 #define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \
470 { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); }
471 /** put yesno into variable */
472 #define S_YNO(str, var) if(strcmp(opt, str) == 0) \
473 { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); }
474 /** put memsize into variable */
475 #define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \
476 { return cfg_parse_memsize(val, &cfg->var); }
477 /** put pow2 number into variable */
478 #define S_POW2(str, var) if(strcmp(opt, str)==0) \
479 { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); }
480 /** put string into variable */
481 #define S_STR(str, var) if(strcmp(opt, str)==0) \
482 { free(cfg->var); return (cfg->var = strdup(val)) != NULL; }
483 /** put string into strlist */
484 #define S_STRLIST(str, var) if(strcmp(opt, str)==0) \
485 { return cfg_strlist_insert(&cfg->var, strdup(val)); }
486 /** put string into strlist if not present yet*/
487 #define S_STRLIST_UNIQ(str, var) if(strcmp(opt, str)==0) \
488 { if(cfg_strlist_find(cfg->var, val)) { return 0;} \
489 return cfg_strlist_insert(&cfg->var, strdup(val)); }
490 /** append string to strlist */
491 #define S_STRLIST_APPEND(str, var) if(strcmp(opt, str)==0) \
492 { return cfg_strlist_append(&cfg->var, strdup(val)); }
493
config_set_option(struct config_file * cfg,const char * opt,const char * val)494 int config_set_option(struct config_file* cfg, const char* opt,
495 const char* val)
496 {
497 char buf[64];
498 if(!opt) return 0;
499 if(opt[strlen(opt)-1] != ':' && strlen(opt)+2<sizeof(buf)) {
500 snprintf(buf, sizeof(buf), "%s:", opt);
501 opt = buf;
502 }
503 S_NUMBER_OR_ZERO("verbosity:", verbosity)
504 else if(strcmp(opt, "statistics-interval:") == 0) {
505 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0)
506 cfg->stat_interval = 0;
507 else if(atoi(val) == 0)
508 return 0;
509 else cfg->stat_interval = atoi(val);
510 } else if(strcmp(opt, "num-threads:") == 0) {
511 /* not supported, library must have 1 thread in bgworker */
512 return 0;
513 } else if(strcmp(opt, "outgoing-port-permit:") == 0) {
514 return cfg_mark_ports(val, 1,
515 cfg->outgoing_avail_ports, 65536);
516 } else if(strcmp(opt, "outgoing-port-avoid:") == 0) {
517 return cfg_mark_ports(val, 0,
518 cfg->outgoing_avail_ports, 65536);
519 } else if(strcmp(opt, "local-zone:") == 0) {
520 return cfg_parse_local_zone(cfg, val);
521 } else if(strcmp(opt, "val-override-date:") == 0) {
522 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) {
523 cfg->val_date_override = 0;
524 } else if(strlen(val) == 14) {
525 cfg->val_date_override = cfg_convert_timeval(val);
526 return cfg->val_date_override != 0;
527 } else {
528 if(atoi(val) == 0) return 0;
529 cfg->val_date_override = (uint32_t)atoi(val);
530 }
531 } else if(strcmp(opt, "local-data-ptr:") == 0) {
532 char* ptr = cfg_ptr_reverse((char*)opt);
533 return cfg_strlist_insert(&cfg->local_data, ptr);
534 } else if(strcmp(opt, "logfile:") == 0) {
535 cfg->use_syslog = 0;
536 free(cfg->logfile);
537 return (cfg->logfile = strdup(val)) != NULL;
538 }
539 else if(strcmp(opt, "log-time-ascii:") == 0)
540 { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0);
541 log_set_time_asc(cfg->log_time_ascii); }
542 else S_SIZET_NONZERO("max-udp-size:", max_udp_size)
543 else S_YNO("use-syslog:", use_syslog)
544 else S_STR("log-identity:", log_identity)
545 else S_YNO("extended-statistics:", stat_extended)
546 else S_YNO("statistics-inhibit-zero:", stat_inhibit_zero)
547 else S_YNO("statistics-cumulative:", stat_cumulative)
548 else S_YNO("shm-enable:", shm_enable)
549 else S_NUMBER_OR_ZERO("shm-key:", shm_key)
550 else S_YNO("do-ip4:", do_ip4)
551 else S_YNO("do-ip6:", do_ip6)
552 else S_YNO("do-udp:", do_udp)
553 else S_YNO("do-tcp:", do_tcp)
554 else S_YNO("prefer-ip4:", prefer_ip4)
555 else S_YNO("prefer-ip6:", prefer_ip6)
556 else S_YNO("tcp-upstream:", tcp_upstream)
557 else S_YNO("udp-upstream-without-downstream:",
558 udp_upstream_without_downstream)
559 else S_NUMBER_NONZERO("tcp-mss:", tcp_mss)
560 else S_NUMBER_NONZERO("outgoing-tcp-mss:", outgoing_tcp_mss)
561 else S_NUMBER_NONZERO("tcp-auth-query-timeout:", tcp_auth_query_timeout)
562 else S_NUMBER_NONZERO("tcp-idle-timeout:", tcp_idle_timeout)
563 else S_NUMBER_NONZERO("max-reuse-tcp-queries:", max_reuse_tcp_queries)
564 else S_NUMBER_NONZERO("tcp-reuse-timeout:", tcp_reuse_timeout)
565 else S_YNO("edns-tcp-keepalive:", do_tcp_keepalive)
566 else S_NUMBER_NONZERO("edns-tcp-keepalive-timeout:", tcp_keepalive_timeout)
567 else S_NUMBER_OR_ZERO("sock-queue-timeout:", sock_queue_timeout)
568 else S_YNO("ssl-upstream:", ssl_upstream)
569 else S_YNO("tls-upstream:", ssl_upstream)
570 else S_STR("ssl-service-key:", ssl_service_key)
571 else S_STR("tls-service-key:", ssl_service_key)
572 else S_STR("ssl-service-pem:", ssl_service_pem)
573 else S_STR("tls-service-pem:", ssl_service_pem)
574 else S_NUMBER_NONZERO("ssl-port:", ssl_port)
575 else S_NUMBER_NONZERO("tls-port:", ssl_port)
576 else S_STR("ssl-cert-bundle:", tls_cert_bundle)
577 else S_STR("tls-cert-bundle:", tls_cert_bundle)
578 else S_YNO("tls-win-cert:", tls_win_cert)
579 else S_YNO("tls-system-cert:", tls_win_cert)
580 else S_STRLIST("additional-ssl-port:", tls_additional_port)
581 else S_STRLIST("additional-tls-port:", tls_additional_port)
582 else S_STRLIST("tls-additional-ports:", tls_additional_port)
583 else S_STRLIST("tls-additional-port:", tls_additional_port)
584 else S_STRLIST_APPEND("tls-session-ticket-keys:", tls_session_ticket_keys)
585 else S_STR("tls-ciphers:", tls_ciphers)
586 else S_STR("tls-ciphersuites:", tls_ciphersuites)
587 else S_YNO("tls-use-sni:", tls_use_sni)
588 else S_NUMBER_NONZERO("https-port:", https_port)
589 else S_STR("http-endpoint:", http_endpoint)
590 else S_NUMBER_NONZERO("http-max-streams:", http_max_streams)
591 else S_MEMSIZE("http-query-buffer-size:", http_query_buffer_size)
592 else S_MEMSIZE("http-response-buffer-size:", http_response_buffer_size)
593 else S_YNO("http-nodelay:", http_nodelay)
594 else S_YNO("http-notls-downstream:", http_notls_downstream)
595 else S_YNO("interface-automatic:", if_automatic)
596 else S_STR("interface-automatic-ports:", if_automatic_ports)
597 else S_YNO("use-systemd:", use_systemd)
598 else S_YNO("do-daemonize:", do_daemonize)
599 else S_NUMBER_NONZERO("port:", port)
600 else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports)
601 else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp)
602 else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp)
603 else S_MEMSIZE("stream-wait-size:", stream_wait_size)
604 else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size)
605 else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size)
606 else S_MEMSIZE("msg-cache-size:", msg_cache_size)
607 else S_POW2("msg-cache-slabs:", msg_cache_slabs)
608 else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread)
609 else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time)
610 else S_MEMSIZE("so-rcvbuf:", so_rcvbuf)
611 else S_MEMSIZE("so-sndbuf:", so_sndbuf)
612 else S_YNO("so-reuseport:", so_reuseport)
613 else S_YNO("ip-transparent:", ip_transparent)
614 else S_YNO("ip-freebind:", ip_freebind)
615 else S_NUMBER_OR_ZERO("ip-dscp:", ip_dscp)
616 else S_MEMSIZE("rrset-cache-size:", rrset_cache_size)
617 else S_POW2("rrset-cache-slabs:", rrset_cache_slabs)
618 else S_YNO("prefetch:", prefetch)
619 else S_YNO("prefetch-key:", prefetch_key)
620 else S_YNO("deny-any:", deny_any)
621 else if(strcmp(opt, "cache-max-ttl:") == 0)
622 { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;}
623 else if(strcmp(opt, "cache-max-negative-ttl:") == 0)
624 { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;}
625 else if(strcmp(opt, "cache-min-negative-ttl:") == 0)
626 { IS_NUMBER_OR_ZERO; cfg->min_negative_ttl = atoi(val); MIN_NEG_TTL=(time_t)cfg->min_negative_ttl;}
627 else if(strcmp(opt, "cache-min-ttl:") == 0)
628 { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;}
629 else if(strcmp(opt, "infra-cache-min-rtt:") == 0) {
630 IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val);
631 RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt;
632 }
633 else if(strcmp(opt, "infra-cache-max-rtt:") == 0) {
634 IS_NUMBER_OR_ZERO; cfg->infra_cache_max_rtt = atoi(val);
635 RTT_MAX_TIMEOUT=cfg->infra_cache_max_rtt;
636 USEFUL_SERVER_TOP_TIMEOUT = RTT_MAX_TIMEOUT;
637 BLACKLIST_PENALTY = USEFUL_SERVER_TOP_TIMEOUT*4;
638 }
639 else S_YNO("infra-keep-probing:", infra_keep_probing)
640 else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl)
641 else S_POW2("infra-cache-slabs:", infra_cache_slabs)
642 else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts)
643 else S_NUMBER_OR_ZERO("delay-close:", delay_close)
644 else S_YNO("udp-connect:", udp_connect)
645 else S_STR("chroot:", chrootdir)
646 else S_STR("username:", username)
647 else S_STR("directory:", directory)
648 else S_STR("pidfile:", pidfile)
649 else S_YNO("hide-identity:", hide_identity)
650 else S_YNO("hide-version:", hide_version)
651 else S_YNO("hide-trustanchor:", hide_trustanchor)
652 else S_YNO("hide-http-user-agent:", hide_http_user_agent)
653 else S_STR("identity:", identity)
654 else S_STR("version:", version)
655 else S_STR("http-user-agent:", http_user_agent)
656 else if(strcmp(opt, "nsid:") == 0) {
657 free(cfg->nsid_cfg_str);
658 if (!(cfg->nsid_cfg_str = strdup(val)))
659 return 0;
660 /* Empty string is just validly unsetting nsid */
661 if (*val == 0) {
662 free(cfg->nsid);
663 cfg->nsid = NULL;
664 cfg->nsid_len = 0;
665 return 1;
666 }
667 cfg->nsid = cfg_parse_nsid(val, &cfg->nsid_len);
668 return cfg->nsid != NULL;
669 }
670 else S_STRLIST("root-hints:", root_hints)
671 else S_STR("target-fetch-policy:", target_fetch_policy)
672 else S_YNO("harden-glue:", harden_glue)
673 else S_YNO("harden-short-bufsize:", harden_short_bufsize)
674 else S_YNO("harden-large-queries:", harden_large_queries)
675 else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped)
676 else S_YNO("harden-below-nxdomain:", harden_below_nxdomain)
677 else S_YNO("harden-referral-path:", harden_referral_path)
678 else S_YNO("harden-algo-downgrade:", harden_algo_downgrade)
679 else S_YNO("harden-unknown-additional:", harden_unknown_additional)
680 else S_YNO("use-caps-for-id:", use_caps_bits_for_id)
681 else S_STRLIST("caps-whitelist:", caps_whitelist)
682 else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold)
683 else S_STRLIST("private-address:", private_address)
684 else S_STRLIST("private-domain:", private_domain)
685 else S_YNO("do-not-query-localhost:", donotquery_localhost)
686 else S_STRLIST("do-not-query-address:", donotqueryaddrs)
687 else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list)
688 else S_STRLIST("trust-anchor-file:", trust_anchor_file_list)
689 else S_STRLIST("trust-anchor:", trust_anchor_list)
690 else S_STRLIST("trusted-keys-file:", trusted_keys_file_list)
691 else S_YNO("trust-anchor-signaling:", trust_anchor_signaling)
692 else S_YNO("root-key-sentinel:", root_key_sentinel)
693 else S_STRLIST("domain-insecure:", domain_insecure)
694 else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl)
695 else S_YNO("val-clean-additional:", val_clean_additional)
696 else S_NUMBER_OR_ZERO("val-log-level:", val_log_level)
697 else S_YNO("val-log-squelch:", val_log_squelch)
698 else S_YNO("log-queries:", log_queries)
699 else S_YNO("log-replies:", log_replies)
700 else S_YNO("log-tag-queryreply:", log_tag_queryreply)
701 else S_YNO("log-local-actions:", log_local_actions)
702 else S_YNO("log-servfail:", log_servfail)
703 else S_YNO("log-destaddr:", log_destaddr)
704 else S_YNO("val-permissive-mode:", val_permissive_mode)
705 else S_YNO("aggressive-nsec:", aggressive_nsec)
706 else S_YNO("ignore-cd-flag:", ignore_cd)
707 else S_YNO("disable-edns-do:", disable_edns_do)
708 else if(strcmp(opt, "serve-expired:") == 0)
709 { IS_YES_OR_NO; cfg->serve_expired = (strcmp(val, "yes") == 0);
710 SERVE_EXPIRED = cfg->serve_expired; }
711 else if(strcmp(opt, "serve-expired-ttl:") == 0)
712 { IS_NUMBER_OR_ZERO; cfg->serve_expired_ttl = atoi(val); SERVE_EXPIRED_TTL=(time_t)cfg->serve_expired_ttl;}
713 else S_YNO("serve-expired-ttl-reset:", serve_expired_ttl_reset)
714 else if(strcmp(opt, "serve-expired-reply-ttl:") == 0)
715 { IS_NUMBER_OR_ZERO; cfg->serve_expired_reply_ttl = atoi(val); SERVE_EXPIRED_REPLY_TTL=(time_t)cfg->serve_expired_reply_ttl;}
716 else S_NUMBER_OR_ZERO("serve-expired-client-timeout:", serve_expired_client_timeout)
717 else S_YNO("ede:", ede)
718 else S_YNO("ede-serve-expired:", ede_serve_expired)
719 else S_YNO("serve-original-ttl:", serve_original_ttl)
720 else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations)
721 else S_YNO("zonemd-permissive-mode:", zonemd_permissive_mode)
722 else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown)
723 else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown)
724 else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing)
725 else if(strcmp(opt, "permit-small-holddown:") == 0)
726 { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0);
727 autr_permit_small_holddown = cfg->permit_small_holddown; }
728 else S_MEMSIZE("key-cache-size:", key_cache_size)
729 else S_POW2("key-cache-slabs:", key_cache_slabs)
730 else S_MEMSIZE("neg-cache-size:", neg_cache_size)
731 else S_YNO("minimal-responses:", minimal_responses)
732 else S_YNO("rrset-roundrobin:", rrset_roundrobin)
733 else S_NUMBER_OR_ZERO("unknown-server-time-limit:", unknown_server_time_limit)
734 else S_NUMBER_OR_ZERO("discard-timeout:", discard_timeout)
735 else S_NUMBER_OR_ZERO("wait-limit:", wait_limit)
736 else S_NUMBER_OR_ZERO("wait-limit-cookie:", wait_limit_cookie)
737 else S_STRLIST("local-data:", local_data)
738 else S_YNO("unblock-lan-zones:", unblock_lan_zones)
739 else S_YNO("insecure-lan-zones:", insecure_lan_zones)
740 else S_YNO("control-enable:", remote_control_enable)
741 else S_STRLIST_APPEND("control-interface:", control_ifs)
742 else S_NUMBER_NONZERO("control-port:", control_port)
743 else S_STR("server-key-file:", server_key_file)
744 else S_STR("server-cert-file:", server_cert_file)
745 else S_STR("control-key-file:", control_key_file)
746 else S_STR("control-cert-file:", control_cert_file)
747 else S_STR("module-config:", module_conf)
748 else S_STRLIST("python-script:", python_script)
749 else S_STRLIST("dynlib-file:", dynlib_file)
750 else S_YNO("disable-dnssec-lame-check:", disable_dnssec_lame_check)
751 #ifdef CLIENT_SUBNET
752 /* Can't set max subnet prefix here, since that value is used when
753 * generating the address tree. */
754 /* No client-subnet-always-forward here, module registration depends on
755 * this option. */
756 #endif
757 #ifdef USE_DNSTAP
758 else S_YNO("dnstap-enable:", dnstap)
759 else S_YNO("dnstap-bidirectional:", dnstap_bidirectional)
760 else S_STR("dnstap-socket-path:", dnstap_socket_path)
761 else S_STR("dnstap-ip:", dnstap_ip)
762 else S_YNO("dnstap-tls:", dnstap_tls)
763 else S_STR("dnstap-tls-server-name:", dnstap_tls_server_name)
764 else S_STR("dnstap-tls-cert-bundle:", dnstap_tls_cert_bundle)
765 else S_STR("dnstap-tls-client-key-file:", dnstap_tls_client_key_file)
766 else S_STR("dnstap-tls-client-cert-file:",
767 dnstap_tls_client_cert_file)
768 else S_YNO("dnstap-send-identity:", dnstap_send_identity)
769 else S_YNO("dnstap-send-version:", dnstap_send_version)
770 else S_STR("dnstap-identity:", dnstap_identity)
771 else S_STR("dnstap-version:", dnstap_version)
772 else S_YNO("dnstap-log-resolver-query-messages:",
773 dnstap_log_resolver_query_messages)
774 else S_YNO("dnstap-log-resolver-response-messages:",
775 dnstap_log_resolver_response_messages)
776 else S_YNO("dnstap-log-client-query-messages:",
777 dnstap_log_client_query_messages)
778 else S_YNO("dnstap-log-client-response-messages:",
779 dnstap_log_client_response_messages)
780 else S_YNO("dnstap-log-forwarder-query-messages:",
781 dnstap_log_forwarder_query_messages)
782 else S_YNO("dnstap-log-forwarder-response-messages:",
783 dnstap_log_forwarder_response_messages)
784 #endif
785 #ifdef USE_DNSCRYPT
786 else S_YNO("dnscrypt-enable:", dnscrypt)
787 else S_NUMBER_NONZERO("dnscrypt-port:", dnscrypt_port)
788 else S_STR("dnscrypt-provider:", dnscrypt_provider)
789 else S_STRLIST_UNIQ("dnscrypt-provider-cert:", dnscrypt_provider_cert)
790 else S_STRLIST("dnscrypt-provider-cert-rotated:", dnscrypt_provider_cert_rotated)
791 else S_STRLIST_UNIQ("dnscrypt-secret-key:", dnscrypt_secret_key)
792 else S_MEMSIZE("dnscrypt-shared-secret-cache-size:",
793 dnscrypt_shared_secret_cache_size)
794 else S_POW2("dnscrypt-shared-secret-cache-slabs:",
795 dnscrypt_shared_secret_cache_slabs)
796 else S_MEMSIZE("dnscrypt-nonce-cache-size:",
797 dnscrypt_nonce_cache_size)
798 else S_POW2("dnscrypt-nonce-cache-slabs:",
799 dnscrypt_nonce_cache_slabs)
800 #endif
801 else if(strcmp(opt, "ip-ratelimit-cookie:") == 0) {
802 IS_NUMBER_OR_ZERO; cfg->ip_ratelimit_cookie = atoi(val);
803 infra_ip_ratelimit_cookie=cfg->ip_ratelimit_cookie;
804 }
805 else if(strcmp(opt, "ip-ratelimit:") == 0) {
806 IS_NUMBER_OR_ZERO; cfg->ip_ratelimit = atoi(val);
807 infra_ip_ratelimit=cfg->ip_ratelimit;
808 }
809 else if(strcmp(opt, "ratelimit:") == 0) {
810 IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val);
811 infra_dp_ratelimit=cfg->ratelimit;
812 }
813 else S_MEMSIZE("ip-ratelimit-size:", ip_ratelimit_size)
814 else S_MEMSIZE("ratelimit-size:", ratelimit_size)
815 else S_POW2("ip-ratelimit-slabs:", ip_ratelimit_slabs)
816 else S_POW2("ratelimit-slabs:", ratelimit_slabs)
817 else S_NUMBER_OR_ZERO("ip-ratelimit-factor:", ip_ratelimit_factor)
818 else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor)
819 else S_YNO("ip-ratelimit-backoff:", ip_ratelimit_backoff)
820 else S_YNO("ratelimit-backoff:", ratelimit_backoff)
821 else S_NUMBER_NONZERO("outbound-msg-retry:", outbound_msg_retry)
822 else S_NUMBER_NONZERO("max-sent-count:", max_sent_count)
823 else S_NUMBER_NONZERO("max-query-restarts:", max_query_restarts)
824 else S_SIZET_NONZERO("fast-server-num:", fast_server_num)
825 else S_NUMBER_OR_ZERO("fast-server-permil:", fast_server_permil)
826 else S_YNO("qname-minimisation:", qname_minimisation)
827 else S_YNO("qname-minimisation-strict:", qname_minimisation_strict)
828 else S_YNO("pad-responses:", pad_responses)
829 else S_SIZET_NONZERO("pad-responses-block-size:", pad_responses_block_size)
830 else S_YNO("pad-queries:", pad_queries)
831 else S_SIZET_NONZERO("pad-queries-block-size:", pad_queries_block_size)
832 else S_STRLIST("proxy-protocol-port:", proxy_protocol_port)
833 #ifdef USE_IPSECMOD
834 else S_YNO("ipsecmod-enabled:", ipsecmod_enabled)
835 else S_YNO("ipsecmod-ignore-bogus:", ipsecmod_ignore_bogus)
836 else if(strcmp(opt, "ipsecmod-max-ttl:") == 0)
837 { IS_NUMBER_OR_ZERO; cfg->ipsecmod_max_ttl = atoi(val); }
838 else S_YNO("ipsecmod-strict:", ipsecmod_strict)
839 #endif
840 #ifdef USE_CACHEDB
841 else S_YNO("cachedb-no-store:", cachedb_no_store)
842 else S_YNO("cachedb-check-when-serve-expired:", cachedb_check_when_serve_expired)
843 #endif /* USE_CACHEDB */
844 else if(strcmp(opt, "define-tag:") ==0) {
845 return config_add_tag(cfg, val);
846 /* val_sig_skew_min, max and val_max_restart are copied into val_env
847 * during init so this does not update val_env with set_option */
848 } else if(strcmp(opt, "val-sig-skew-min:") == 0)
849 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); }
850 else if(strcmp(opt, "val-sig-skew-max:") == 0)
851 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); }
852 else if(strcmp(opt, "val-max-restart:") == 0)
853 { IS_NUMBER_OR_ZERO; cfg->val_max_restart = (int32_t)atoi(val); }
854 else if (strcmp(opt, "outgoing-interface:") == 0) {
855 char* d = strdup(val);
856 char** oi =
857 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*));
858 if(!d || !oi) { free(d); free(oi); return -1; }
859 if(cfg->out_ifs && cfg->num_out_ifs) {
860 memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*));
861 free(cfg->out_ifs);
862 }
863 oi[cfg->num_out_ifs++] = d;
864 cfg->out_ifs = oi;
865 } else {
866 /* unknown or unsupported (from the set_option interface):
867 * interface, outgoing-interface, access-control,
868 * stub-zone, name, stub-addr, stub-host, stub-prime
869 * forward-first, stub-first, forward-ssl-upstream,
870 * stub-ssl-upstream, forward-zone, auth-zone
871 * name, forward-addr, forward-host,
872 * ratelimit-for-domain, ratelimit-below-domain,
873 * local-zone-tag, access-control-view, interface-*,
874 * send-client-subnet, client-subnet-always-forward,
875 * max-client-subnet-ipv4, max-client-subnet-ipv6,
876 * min-client-subnet-ipv4, min-client-subnet-ipv6,
877 * max-ecs-tree-size-ipv4, max-ecs-tree-size-ipv6, ipsecmod_hook,
878 * ipsecmod_whitelist. */
879 return 0;
880 }
881 return 1;
882 }
883
config_print_func(char * line,void * arg)884 void config_print_func(char* line, void* arg)
885 {
886 FILE* f = (FILE*)arg;
887 (void)fprintf(f, "%s\n", line);
888 }
889
890 /** collate func arg */
891 struct config_collate_arg {
892 /** list of result items */
893 struct config_strlist_head list;
894 /** if a malloc error occurred, 0 is OK */
895 int status;
896 };
897
config_collate_func(char * line,void * arg)898 void config_collate_func(char* line, void* arg)
899 {
900 struct config_collate_arg* m = (struct config_collate_arg*)arg;
901 if(m->status)
902 return;
903 if(!cfg_strlist_append(&m->list, strdup(line)))
904 m->status = 1;
905 }
906
config_get_option_list(struct config_file * cfg,const char * opt,struct config_strlist ** list)907 int config_get_option_list(struct config_file* cfg, const char* opt,
908 struct config_strlist** list)
909 {
910 struct config_collate_arg m;
911 memset(&m, 0, sizeof(m));
912 *list = NULL;
913 if(!config_get_option(cfg, opt, config_collate_func, &m))
914 return 1;
915 if(m.status) {
916 config_delstrlist(m.list.first);
917 return 2;
918 }
919 *list = m.list.first;
920 return 0;
921 }
922
923 int
config_get_option_collate(struct config_file * cfg,const char * opt,char ** str)924 config_get_option_collate(struct config_file* cfg, const char* opt, char** str)
925 {
926 struct config_strlist* list = NULL;
927 int r;
928 *str = NULL;
929 if((r = config_get_option_list(cfg, opt, &list)) != 0)
930 return r;
931 *str = config_collate_cat(list);
932 config_delstrlist(list);
933 if(!*str) return 2;
934 return 0;
935 }
936
937 char*
config_collate_cat(struct config_strlist * list)938 config_collate_cat(struct config_strlist* list)
939 {
940 size_t total = 0, left;
941 struct config_strlist* s;
942 char *r, *w;
943 if(!list) /* no elements */
944 return strdup("");
945 if(list->next == NULL) /* one element , no newline at end. */
946 return strdup(list->str);
947 /* count total length */
948 for(s=list; s; s=s->next)
949 total += strlen(s->str) + 1; /* len + newline */
950 left = total+1; /* one extra for nul at end */
951 r = malloc(left);
952 if(!r)
953 return NULL;
954 w = r;
955 for(s=list; s; s=s->next) {
956 size_t this = strlen(s->str);
957 if(this+2 > left) { /* sanity check */
958 free(r);
959 return NULL;
960 }
961 snprintf(w, left, "%s\n", s->str);
962 this = strlen(w);
963 w += this;
964 left -= this;
965 }
966 return r;
967 }
968
969 /** compare and print decimal option */
970 #define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \
971 {snprintf(buf, len, "%d", (int)cfg->var); \
972 func(buf, arg);}
973 /** compare and print unsigned option */
974 #define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \
975 {snprintf(buf, len, "%u", (unsigned)cfg->var); \
976 func(buf, arg);}
977 /** compare and print yesno option */
978 #define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \
979 {func(cfg->var?"yes":"no", arg);}
980 /** compare and print string option */
981 #define O_STR(opt, str, var) if(strcmp(opt, str)==0) \
982 {func(cfg->var?cfg->var:"", arg);}
983 /** compare and print array option */
984 #define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \
985 {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);}
986 /** compare and print memorysize option */
987 #define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \
988 if(cfg->var > 1024*1024*1024) { \
989 size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \
990 snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \
991 } else snprintf(buf, len, "%u", (unsigned)cfg->var); \
992 func(buf, arg);}
993 /** compare and print list option */
994 #define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \
995 struct config_strlist* p = cfg->lst; \
996 for(p = cfg->lst; p; p = p->next) \
997 func(p->str, arg); \
998 }
999 /** compare and print list option */
1000 #define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \
1001 struct config_str2list* p = cfg->lst; \
1002 for(p = cfg->lst; p; p = p->next) { \
1003 snprintf(buf, len, "%s %s", p->str, p->str2); \
1004 func(buf, arg); \
1005 } \
1006 }
1007 /** compare and print list option */
1008 #define O_LS3(opt, name, lst) if(strcmp(opt, name)==0) { \
1009 struct config_str3list* p = cfg->lst; \
1010 for(p = cfg->lst; p; p = p->next) { \
1011 snprintf(buf, len, "%s %s %s", p->str, p->str2, p->str3); \
1012 func(buf, arg); \
1013 } \
1014 }
1015 /** compare and print taglist option */
1016 #define O_LTG(opt, name, lst) if(strcmp(opt, name)==0) { \
1017 char* tmpstr = NULL; \
1018 struct config_strbytelist *p = cfg->lst; \
1019 for(p = cfg->lst; p; p = p->next) {\
1020 tmpstr = config_taglist2str(cfg, p->str2, p->str2len); \
1021 if(tmpstr) {\
1022 snprintf(buf, len, "%s %s", p->str, tmpstr); \
1023 func(buf, arg); \
1024 free(tmpstr); \
1025 } \
1026 } \
1027 }
1028
1029 int
config_get_option(struct config_file * cfg,const char * opt,void (* func)(char *,void *),void * arg)1030 config_get_option(struct config_file* cfg, const char* opt,
1031 void (*func)(char*,void*), void* arg)
1032 {
1033 char buf[1024], nopt[64];
1034 size_t len = sizeof(buf);
1035 if(!opt) return 0;
1036 if(opt && opt[strlen(opt)-1] == ':' && strlen(opt)<sizeof(nopt)) {
1037 memmove(nopt, opt, strlen(opt));
1038 nopt[strlen(opt)-1] = 0;
1039 opt = nopt;
1040 }
1041 fptr_ok(fptr_whitelist_print_func(func));
1042 O_DEC(opt, "verbosity", verbosity)
1043 else O_DEC(opt, "statistics-interval", stat_interval)
1044 else O_YNO(opt, "statistics-cumulative", stat_cumulative)
1045 else O_YNO(opt, "extended-statistics", stat_extended)
1046 else O_YNO(opt, "statistics-inhibit-zero", stat_inhibit_zero)
1047 else O_YNO(opt, "shm-enable", shm_enable)
1048 else O_DEC(opt, "shm-key", shm_key)
1049 else O_YNO(opt, "use-syslog", use_syslog)
1050 else O_STR(opt, "log-identity", log_identity)
1051 else O_YNO(opt, "log-time-ascii", log_time_ascii)
1052 else O_DEC(opt, "num-threads", num_threads)
1053 else O_IFC(opt, "interface", num_ifs, ifs)
1054 else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs)
1055 else O_YNO(opt, "interface-automatic", if_automatic)
1056 else O_STR(opt, "interface-automatic-ports", if_automatic_ports)
1057 else O_DEC(opt, "port", port)
1058 else O_DEC(opt, "outgoing-range", outgoing_num_ports)
1059 else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp)
1060 else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp)
1061 else O_MEM(opt, "stream-wait-size", stream_wait_size)
1062 else O_DEC(opt, "edns-buffer-size", edns_buffer_size)
1063 else O_DEC(opt, "msg-buffer-size", msg_buffer_size)
1064 else O_MEM(opt, "msg-cache-size", msg_cache_size)
1065 else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs)
1066 else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread)
1067 else O_UNS(opt, "jostle-timeout", jostle_time)
1068 else O_MEM(opt, "so-rcvbuf", so_rcvbuf)
1069 else O_MEM(opt, "so-sndbuf", so_sndbuf)
1070 else O_YNO(opt, "so-reuseport", so_reuseport)
1071 else O_YNO(opt, "ip-transparent", ip_transparent)
1072 else O_YNO(opt, "ip-freebind", ip_freebind)
1073 else O_DEC(opt, "ip-dscp", ip_dscp)
1074 else O_MEM(opt, "rrset-cache-size", rrset_cache_size)
1075 else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs)
1076 else O_YNO(opt, "prefetch-key", prefetch_key)
1077 else O_YNO(opt, "prefetch", prefetch)
1078 else O_YNO(opt, "deny-any", deny_any)
1079 else O_DEC(opt, "cache-max-ttl", max_ttl)
1080 else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl)
1081 else O_DEC(opt, "cache-min-negative-ttl", min_negative_ttl)
1082 else O_DEC(opt, "cache-min-ttl", min_ttl)
1083 else O_DEC(opt, "infra-host-ttl", host_ttl)
1084 else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs)
1085 else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt)
1086 else O_UNS(opt, "infra-cache-max-rtt", infra_cache_max_rtt)
1087 else O_YNO(opt, "infra-keep-probing", infra_keep_probing)
1088 else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts)
1089 else O_UNS(opt, "delay-close", delay_close)
1090 else O_YNO(opt, "udp-connect", udp_connect)
1091 else O_YNO(opt, "do-ip4", do_ip4)
1092 else O_YNO(opt, "do-ip6", do_ip6)
1093 else O_YNO(opt, "do-udp", do_udp)
1094 else O_YNO(opt, "do-tcp", do_tcp)
1095 else O_YNO(opt, "prefer-ip4", prefer_ip4)
1096 else O_YNO(opt, "prefer-ip6", prefer_ip6)
1097 else O_YNO(opt, "tcp-upstream", tcp_upstream)
1098 else O_YNO(opt, "udp-upstream-without-downstream", udp_upstream_without_downstream)
1099 else O_DEC(opt, "tcp-mss", tcp_mss)
1100 else O_DEC(opt, "outgoing-tcp-mss", outgoing_tcp_mss)
1101 else O_DEC(opt, "tcp-auth-query-timeout", tcp_auth_query_timeout)
1102 else O_DEC(opt, "tcp-idle-timeout", tcp_idle_timeout)
1103 else O_DEC(opt, "max-reuse-tcp-queries", max_reuse_tcp_queries)
1104 else O_DEC(opt, "tcp-reuse-timeout", tcp_reuse_timeout)
1105 else O_YNO(opt, "edns-tcp-keepalive", do_tcp_keepalive)
1106 else O_DEC(opt, "edns-tcp-keepalive-timeout", tcp_keepalive_timeout)
1107 else O_DEC(opt, "sock-queue-timeout", sock_queue_timeout)
1108 else O_YNO(opt, "ssl-upstream", ssl_upstream)
1109 else O_YNO(opt, "tls-upstream", ssl_upstream)
1110 else O_STR(opt, "ssl-service-key", ssl_service_key)
1111 else O_STR(opt, "tls-service-key", ssl_service_key)
1112 else O_STR(opt, "ssl-service-pem", ssl_service_pem)
1113 else O_STR(opt, "tls-service-pem", ssl_service_pem)
1114 else O_DEC(opt, "ssl-port", ssl_port)
1115 else O_DEC(opt, "tls-port", ssl_port)
1116 else O_STR(opt, "ssl-cert-bundle", tls_cert_bundle)
1117 else O_STR(opt, "tls-cert-bundle", tls_cert_bundle)
1118 else O_YNO(opt, "tls-win-cert", tls_win_cert)
1119 else O_YNO(opt, "tls-system-cert", tls_win_cert)
1120 else O_LST(opt, "additional-ssl-port", tls_additional_port)
1121 else O_LST(opt, "additional-tls-port", tls_additional_port)
1122 else O_LST(opt, "tls-additional-ports", tls_additional_port)
1123 else O_LST(opt, "tls-additional-port", tls_additional_port)
1124 else O_LST(opt, "tls-session-ticket-keys", tls_session_ticket_keys.first)
1125 else O_STR(opt, "tls-ciphers", tls_ciphers)
1126 else O_STR(opt, "tls-ciphersuites", tls_ciphersuites)
1127 else O_YNO(opt, "tls-use-sni", tls_use_sni)
1128 else O_DEC(opt, "https-port", https_port)
1129 else O_STR(opt, "http-endpoint", http_endpoint)
1130 else O_UNS(opt, "http-max-streams", http_max_streams)
1131 else O_MEM(opt, "http-query-buffer-size", http_query_buffer_size)
1132 else O_MEM(opt, "http-response-buffer-size", http_response_buffer_size)
1133 else O_YNO(opt, "http-nodelay", http_nodelay)
1134 else O_YNO(opt, "http-notls-downstream", http_notls_downstream)
1135 else O_YNO(opt, "use-systemd", use_systemd)
1136 else O_YNO(opt, "do-daemonize", do_daemonize)
1137 else O_STR(opt, "chroot", chrootdir)
1138 else O_STR(opt, "username", username)
1139 else O_STR(opt, "directory", directory)
1140 else O_STR(opt, "logfile", logfile)
1141 else O_YNO(opt, "log-queries", log_queries)
1142 else O_YNO(opt, "log-replies", log_replies)
1143 else O_YNO(opt, "log-tag-queryreply", log_tag_queryreply)
1144 else O_YNO(opt, "log-local-actions", log_local_actions)
1145 else O_YNO(opt, "log-servfail", log_servfail)
1146 else O_YNO(opt, "log-destaddr", log_destaddr)
1147 else O_STR(opt, "pidfile", pidfile)
1148 else O_YNO(opt, "hide-identity", hide_identity)
1149 else O_YNO(opt, "hide-version", hide_version)
1150 else O_YNO(opt, "hide-trustanchor", hide_trustanchor)
1151 else O_YNO(opt, "hide-http-user-agent", hide_http_user_agent)
1152 else O_STR(opt, "identity", identity)
1153 else O_STR(opt, "version", version)
1154 else O_STR(opt, "http-user-agent", http_user_agent)
1155 else O_STR(opt, "nsid", nsid_cfg_str)
1156 else O_STR(opt, "target-fetch-policy", target_fetch_policy)
1157 else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize)
1158 else O_YNO(opt, "harden-large-queries", harden_large_queries)
1159 else O_YNO(opt, "harden-glue", harden_glue)
1160 else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped)
1161 else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain)
1162 else O_YNO(opt, "harden-referral-path", harden_referral_path)
1163 else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade)
1164 else O_YNO(opt, "harden-unknown-additional", harden_unknown_additional)
1165 else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id)
1166 else O_LST(opt, "caps-whitelist", caps_whitelist)
1167 else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold)
1168 else O_YNO(opt, "do-not-query-localhost", donotquery_localhost)
1169 else O_STR(opt, "module-config", module_conf)
1170 else O_DEC(opt, "val-bogus-ttl", bogus_ttl)
1171 else O_YNO(opt, "val-clean-additional", val_clean_additional)
1172 else O_DEC(opt, "val-log-level", val_log_level)
1173 else O_YNO(opt, "val-permissive-mode", val_permissive_mode)
1174 else O_YNO(opt, "aggressive-nsec", aggressive_nsec)
1175 else O_YNO(opt, "ignore-cd-flag", ignore_cd)
1176 else O_YNO(opt, "disable-edns-do", disable_edns_do)
1177 else O_YNO(opt, "serve-expired", serve_expired)
1178 else O_DEC(opt, "serve-expired-ttl", serve_expired_ttl)
1179 else O_YNO(opt, "serve-expired-ttl-reset", serve_expired_ttl_reset)
1180 else O_DEC(opt, "serve-expired-reply-ttl", serve_expired_reply_ttl)
1181 else O_DEC(opt, "serve-expired-client-timeout", serve_expired_client_timeout)
1182 else O_YNO(opt, "ede", ede)
1183 else O_YNO(opt, "ede-serve-expired", ede_serve_expired)
1184 else O_YNO(opt, "serve-original-ttl", serve_original_ttl)
1185 else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations)
1186 else O_YNO(opt, "zonemd-permissive-mode", zonemd_permissive_mode)
1187 else O_UNS(opt, "add-holddown", add_holddown)
1188 else O_UNS(opt, "del-holddown", del_holddown)
1189 else O_UNS(opt, "keep-missing", keep_missing)
1190 else O_YNO(opt, "permit-small-holddown", permit_small_holddown)
1191 else O_MEM(opt, "key-cache-size", key_cache_size)
1192 else O_DEC(opt, "key-cache-slabs", key_cache_slabs)
1193 else O_MEM(opt, "neg-cache-size", neg_cache_size)
1194 else O_YNO(opt, "control-enable", remote_control_enable)
1195 else O_DEC(opt, "control-port", control_port)
1196 else O_STR(opt, "server-key-file", server_key_file)
1197 else O_STR(opt, "server-cert-file", server_cert_file)
1198 else O_STR(opt, "control-key-file", control_key_file)
1199 else O_STR(opt, "control-cert-file", control_cert_file)
1200 else O_LST(opt, "root-hints", root_hints)
1201 else O_LS2(opt, "access-control", acls)
1202 else O_LS2(opt, "tcp-connection-limit", tcp_connection_limits)
1203 else O_LST(opt, "do-not-query-address", donotqueryaddrs)
1204 else O_LST(opt, "private-address", private_address)
1205 else O_LST(opt, "private-domain", private_domain)
1206 else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list)
1207 else O_LST(opt, "trust-anchor-file", trust_anchor_file_list)
1208 else O_LST(opt, "trust-anchor", trust_anchor_list)
1209 else O_LST(opt, "trusted-keys-file", trusted_keys_file_list)
1210 else O_YNO(opt, "trust-anchor-signaling", trust_anchor_signaling)
1211 else O_YNO(opt, "root-key-sentinel", root_key_sentinel)
1212 else O_LST(opt, "control-interface", control_ifs.first)
1213 else O_LST(opt, "domain-insecure", domain_insecure)
1214 else O_UNS(opt, "val-override-date", val_date_override)
1215 else O_YNO(opt, "minimal-responses", minimal_responses)
1216 else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin)
1217 else O_DEC(opt, "unknown-server-time-limit", unknown_server_time_limit)
1218 else O_DEC(opt, "discard-timeout", discard_timeout)
1219 else O_DEC(opt, "wait-limit", wait_limit)
1220 else O_DEC(opt, "wait-limit-cookie", wait_limit_cookie)
1221 else O_LS2(opt, "wait-limit-netblock", wait_limit_netblock)
1222 else O_LS2(opt, "wait-limit-cookie-netblock", wait_limit_cookie_netblock)
1223 #ifdef CLIENT_SUBNET
1224 else O_LST(opt, "send-client-subnet", client_subnet)
1225 else O_LST(opt, "client-subnet-zone", client_subnet_zone)
1226 else O_DEC(opt, "max-client-subnet-ipv4", max_client_subnet_ipv4)
1227 else O_DEC(opt, "max-client-subnet-ipv6", max_client_subnet_ipv6)
1228 else O_DEC(opt, "min-client-subnet-ipv4", min_client_subnet_ipv4)
1229 else O_DEC(opt, "min-client-subnet-ipv6", min_client_subnet_ipv6)
1230 else O_DEC(opt, "max-ecs-tree-size-ipv4", max_ecs_tree_size_ipv4)
1231 else O_DEC(opt, "max-ecs-tree-size-ipv6", max_ecs_tree_size_ipv6)
1232 else O_YNO(opt, "client-subnet-always-forward:",
1233 client_subnet_always_forward)
1234 #endif
1235 #ifdef USE_DNSTAP
1236 else O_YNO(opt, "dnstap-enable", dnstap)
1237 else O_YNO(opt, "dnstap-bidirectional", dnstap_bidirectional)
1238 else O_STR(opt, "dnstap-socket-path", dnstap_socket_path)
1239 else O_STR(opt, "dnstap-ip", dnstap_ip)
1240 else O_YNO(opt, "dnstap-tls", dnstap_tls)
1241 else O_STR(opt, "dnstap-tls-server-name", dnstap_tls_server_name)
1242 else O_STR(opt, "dnstap-tls-cert-bundle", dnstap_tls_cert_bundle)
1243 else O_STR(opt, "dnstap-tls-client-key-file",
1244 dnstap_tls_client_key_file)
1245 else O_STR(opt, "dnstap-tls-client-cert-file",
1246 dnstap_tls_client_cert_file)
1247 else O_YNO(opt, "dnstap-send-identity", dnstap_send_identity)
1248 else O_YNO(opt, "dnstap-send-version", dnstap_send_version)
1249 else O_STR(opt, "dnstap-identity", dnstap_identity)
1250 else O_STR(opt, "dnstap-version", dnstap_version)
1251 else O_YNO(opt, "dnstap-log-resolver-query-messages",
1252 dnstap_log_resolver_query_messages)
1253 else O_YNO(opt, "dnstap-log-resolver-response-messages",
1254 dnstap_log_resolver_response_messages)
1255 else O_YNO(opt, "dnstap-log-client-query-messages",
1256 dnstap_log_client_query_messages)
1257 else O_YNO(opt, "dnstap-log-client-response-messages",
1258 dnstap_log_client_response_messages)
1259 else O_YNO(opt, "dnstap-log-forwarder-query-messages",
1260 dnstap_log_forwarder_query_messages)
1261 else O_YNO(opt, "dnstap-log-forwarder-response-messages",
1262 dnstap_log_forwarder_response_messages)
1263 #endif
1264 #ifdef USE_DNSCRYPT
1265 else O_YNO(opt, "dnscrypt-enable", dnscrypt)
1266 else O_DEC(opt, "dnscrypt-port", dnscrypt_port)
1267 else O_STR(opt, "dnscrypt-provider", dnscrypt_provider)
1268 else O_LST(opt, "dnscrypt-provider-cert", dnscrypt_provider_cert)
1269 else O_LST(opt, "dnscrypt-provider-cert-rotated", dnscrypt_provider_cert_rotated)
1270 else O_LST(opt, "dnscrypt-secret-key", dnscrypt_secret_key)
1271 else O_MEM(opt, "dnscrypt-shared-secret-cache-size",
1272 dnscrypt_shared_secret_cache_size)
1273 else O_DEC(opt, "dnscrypt-shared-secret-cache-slabs",
1274 dnscrypt_shared_secret_cache_slabs)
1275 else O_MEM(opt, "dnscrypt-nonce-cache-size",
1276 dnscrypt_nonce_cache_size)
1277 else O_DEC(opt, "dnscrypt-nonce-cache-slabs",
1278 dnscrypt_nonce_cache_slabs)
1279 #endif
1280 else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones)
1281 else O_YNO(opt, "insecure-lan-zones", insecure_lan_zones)
1282 else O_DEC(opt, "max-udp-size", max_udp_size)
1283 else O_LST(opt, "python-script", python_script)
1284 else O_LST(opt, "dynlib-file", dynlib_file)
1285 else O_YNO(opt, "disable-dnssec-lame-check", disable_dnssec_lame_check)
1286 else O_DEC(opt, "ip-ratelimit-cookie", ip_ratelimit_cookie)
1287 else O_DEC(opt, "ip-ratelimit", ip_ratelimit)
1288 else O_DEC(opt, "ratelimit", ratelimit)
1289 else O_MEM(opt, "ip-ratelimit-size", ip_ratelimit_size)
1290 else O_MEM(opt, "ratelimit-size", ratelimit_size)
1291 else O_DEC(opt, "ip-ratelimit-slabs", ip_ratelimit_slabs)
1292 else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs)
1293 else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain)
1294 else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain)
1295 else O_DEC(opt, "ip-ratelimit-factor", ip_ratelimit_factor)
1296 else O_DEC(opt, "ratelimit-factor", ratelimit_factor)
1297 else O_YNO(opt, "ip-ratelimit-backoff", ip_ratelimit_backoff)
1298 else O_YNO(opt, "ratelimit-backoff", ratelimit_backoff)
1299 else O_UNS(opt, "outbound-msg-retry", outbound_msg_retry)
1300 else O_UNS(opt, "max-sent-count", max_sent_count)
1301 else O_UNS(opt, "max-query-restarts", max_query_restarts)
1302 else O_DEC(opt, "fast-server-num", fast_server_num)
1303 else O_DEC(opt, "fast-server-permil", fast_server_permil)
1304 else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min)
1305 else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max)
1306 else O_DEC(opt, "val-max-restart", val_max_restart)
1307 else O_YNO(opt, "qname-minimisation", qname_minimisation)
1308 else O_YNO(opt, "qname-minimisation-strict", qname_minimisation_strict)
1309 else O_IFC(opt, "define-tag", num_tags, tagname)
1310 else O_LTG(opt, "local-zone-tag", local_zone_tags)
1311 else O_LTG(opt, "access-control-tag", acl_tags)
1312 else O_LTG(opt, "response-ip-tag", respip_tags)
1313 else O_LS3(opt, "local-zone-override", local_zone_overrides)
1314 else O_LS3(opt, "access-control-tag-action", acl_tag_actions)
1315 else O_LS3(opt, "access-control-tag-data", acl_tag_datas)
1316 else O_LS2(opt, "access-control-view", acl_view)
1317 else O_LS2(opt, "interface-action", interface_actions)
1318 else O_LTG(opt, "interface-tag", interface_tags)
1319 else O_LS3(opt, "interface-tag-action", interface_tag_actions)
1320 else O_LS3(opt, "interface-tag-data", interface_tag_datas)
1321 else O_LS2(opt, "interface-view", interface_view)
1322 else O_YNO(opt, "pad-responses", pad_responses)
1323 else O_DEC(opt, "pad-responses-block-size", pad_responses_block_size)
1324 else O_YNO(opt, "pad-queries", pad_queries)
1325 else O_DEC(opt, "pad-queries-block-size", pad_queries_block_size)
1326 else O_LS2(opt, "edns-client-strings", edns_client_strings)
1327 else O_LST(opt, "proxy-protocol-port", proxy_protocol_port)
1328 #ifdef USE_IPSECMOD
1329 else O_YNO(opt, "ipsecmod-enabled", ipsecmod_enabled)
1330 else O_YNO(opt, "ipsecmod-ignore-bogus", ipsecmod_ignore_bogus)
1331 else O_STR(opt, "ipsecmod-hook", ipsecmod_hook)
1332 else O_DEC(opt, "ipsecmod-max-ttl", ipsecmod_max_ttl)
1333 else O_LST(opt, "ipsecmod-whitelist", ipsecmod_whitelist)
1334 else O_YNO(opt, "ipsecmod-strict", ipsecmod_strict)
1335 #endif
1336 #ifdef USE_CACHEDB
1337 else O_STR(opt, "backend", cachedb_backend)
1338 else O_STR(opt, "secret-seed", cachedb_secret)
1339 else O_YNO(opt, "cachedb-no-store", cachedb_no_store)
1340 else O_YNO(opt, "cachedb-check-when-serve-expired", cachedb_check_when_serve_expired)
1341 #ifdef USE_REDIS
1342 else O_STR(opt, "redis-server-host", redis_server_host)
1343 else O_DEC(opt, "redis-server-port", redis_server_port)
1344 else O_STR(opt, "redis-server-path", redis_server_path)
1345 else O_STR(opt, "redis-server-password", redis_server_password)
1346 else O_DEC(opt, "redis-timeout", redis_timeout)
1347 else O_YNO(opt, "redis-expire-records", redis_expire_records)
1348 else O_DEC(opt, "redis-logical-db", redis_logical_db)
1349 #endif /* USE_REDIS */
1350 #endif /* USE_CACHEDB */
1351 #ifdef USE_IPSET
1352 else O_STR(opt, "name-v4", ipset_name_v4)
1353 else O_STR(opt, "name-v6", ipset_name_v6)
1354 #endif
1355 /* not here:
1356 * outgoing-permit, outgoing-avoid - have list of ports
1357 * local-zone - zones and nodefault variables
1358 * local-data - see below
1359 * local-data-ptr - converted to local-data entries
1360 * stub-zone, name, stub-addr, stub-host, stub-prime
1361 * forward-zone, name, forward-addr, forward-host
1362 */
1363 else return 0;
1364 return 1;
1365 }
1366
1367 /** initialize the global cfg_parser object */
1368 static void
create_cfg_parser(struct config_file * cfg,char * filename,const char * chroot)1369 create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot)
1370 {
1371 static struct config_parser_state st;
1372 cfg_parser = &st;
1373 cfg_parser->filename = filename;
1374 cfg_parser->line = 1;
1375 cfg_parser->errors = 0;
1376 cfg_parser->cfg = cfg;
1377 cfg_parser->chroot = chroot;
1378 cfg_parser->started_toplevel = 0;
1379 init_cfg_parse();
1380 }
1381
1382 int
config_read(struct config_file * cfg,const char * filename,const char * chroot)1383 config_read(struct config_file* cfg, const char* filename, const char* chroot)
1384 {
1385 FILE *in;
1386 char *fname = (char*)filename;
1387 #ifdef HAVE_GLOB
1388 glob_t g;
1389 size_t i;
1390 int r, flags;
1391 #endif
1392 if(!fname)
1393 return 1;
1394
1395 /* check for wildcards */
1396 #ifdef HAVE_GLOB
1397 if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') &&
1398 !strchr(fname, '{') && !strchr(fname, '~'))) {
1399 verbose(VERB_QUERY, "wildcard found, processing %s", fname);
1400 flags = 0
1401 #ifdef GLOB_ERR
1402 | GLOB_ERR
1403 #endif
1404 #ifdef GLOB_NOSORT
1405 | GLOB_NOSORT
1406 #endif
1407 #ifdef GLOB_BRACE
1408 | GLOB_BRACE
1409 #endif
1410 #ifdef GLOB_TILDE
1411 | GLOB_TILDE
1412 #endif
1413 ;
1414 memset(&g, 0, sizeof(g));
1415 r = glob(fname, flags, NULL, &g);
1416 if(r) {
1417 /* some error */
1418 globfree(&g);
1419 if(r == GLOB_NOMATCH) {
1420 verbose(VERB_QUERY, "include: "
1421 "no matches for %s", fname);
1422 return 1;
1423 } else if(r == GLOB_NOSPACE) {
1424 log_err("include: %s: "
1425 "fnametern out of memory", fname);
1426 } else if(r == GLOB_ABORTED) {
1427 log_err("wildcard include: %s: expansion "
1428 "aborted (%s)", fname, strerror(errno));
1429 } else {
1430 log_err("wildcard include: %s: expansion "
1431 "failed (%s)", fname, strerror(errno));
1432 }
1433 /* ignore globs that yield no files */
1434 return 1;
1435 }
1436 /* process files found, if any */
1437 for(i=0; i<(size_t)g.gl_pathc; i++) {
1438 if(!config_read(cfg, g.gl_pathv[i], chroot)) {
1439 log_err("error reading wildcard "
1440 "include: %s", g.gl_pathv[i]);
1441 globfree(&g);
1442 return 0;
1443 }
1444 }
1445 globfree(&g);
1446 return 1;
1447 }
1448 #endif /* HAVE_GLOB */
1449
1450 in = fopen(fname, "r");
1451 if(!in) {
1452 log_err("Could not open %s: %s", fname, strerror(errno));
1453 return 0;
1454 }
1455 create_cfg_parser(cfg, fname, chroot);
1456 ub_c_in = in;
1457 ub_c_parse();
1458 fclose(in);
1459
1460 if(!cfg->dnscrypt) cfg->dnscrypt_port = 0;
1461
1462 if(cfg_parser->errors != 0) {
1463 fprintf(stderr, "read %s failed: %d errors in configuration file\n",
1464 fname, cfg_parser->errors);
1465 errno=EINVAL;
1466 return 0;
1467 }
1468
1469 return 1;
1470 }
1471
cfg_stub_find(struct config_stub *** pp,const char * nm)1472 struct config_stub* cfg_stub_find(struct config_stub*** pp, const char* nm)
1473 {
1474 struct config_stub* p = *(*pp);
1475 while(p) {
1476 if(strcmp(p->name, nm) == 0)
1477 return p;
1478 (*pp) = &p->next;
1479 p = p->next;
1480 }
1481 return NULL;
1482 }
1483
1484 void
config_delstrlist(struct config_strlist * p)1485 config_delstrlist(struct config_strlist* p)
1486 {
1487 struct config_strlist *np;
1488 while(p) {
1489 np = p->next;
1490 free(p->str);
1491 free(p);
1492 p = np;
1493 }
1494 }
1495
1496 void
config_deldblstrlist(struct config_str2list * p)1497 config_deldblstrlist(struct config_str2list* p)
1498 {
1499 struct config_str2list *np;
1500 while(p) {
1501 np = p->next;
1502 free(p->str);
1503 free(p->str2);
1504 free(p);
1505 p = np;
1506 }
1507 }
1508
1509 void
config_deltrplstrlist(struct config_str3list * p)1510 config_deltrplstrlist(struct config_str3list* p)
1511 {
1512 struct config_str3list *np;
1513 while(p) {
1514 np = p->next;
1515 free(p->str);
1516 free(p->str2);
1517 free(p->str3);
1518 free(p);
1519 p = np;
1520 }
1521 }
1522
1523 void
config_delauth(struct config_auth * p)1524 config_delauth(struct config_auth* p)
1525 {
1526 if(!p) return;
1527 free(p->name);
1528 config_delstrlist(p->masters);
1529 config_delstrlist(p->urls);
1530 config_delstrlist(p->allow_notify);
1531 free(p->zonefile);
1532 free(p->rpz_taglist);
1533 free(p->rpz_action_override);
1534 free(p->rpz_cname);
1535 free(p->rpz_log_name);
1536 free(p);
1537 }
1538
1539 void
config_delauths(struct config_auth * p)1540 config_delauths(struct config_auth* p)
1541 {
1542 struct config_auth* np;
1543 while(p) {
1544 np = p->next;
1545 config_delauth(p);
1546 p = np;
1547 }
1548 }
1549
1550 void
config_delstub(struct config_stub * p)1551 config_delstub(struct config_stub* p)
1552 {
1553 if(!p) return;
1554 free(p->name);
1555 config_delstrlist(p->hosts);
1556 config_delstrlist(p->addrs);
1557 free(p);
1558 }
1559
1560 void
config_delstubs(struct config_stub * p)1561 config_delstubs(struct config_stub* p)
1562 {
1563 struct config_stub* np;
1564 while(p) {
1565 np = p->next;
1566 config_delstub(p);
1567 p = np;
1568 }
1569 }
1570
1571 void
config_delview(struct config_view * p)1572 config_delview(struct config_view* p)
1573 {
1574 if(!p) return;
1575 free(p->name);
1576 config_deldblstrlist(p->local_zones);
1577 config_delstrlist(p->local_zones_nodefault);
1578 #ifdef USE_IPSET
1579 config_delstrlist(p->local_zones_ipset);
1580 #endif
1581 config_delstrlist(p->local_data);
1582 free(p);
1583 }
1584
1585 void
config_delviews(struct config_view * p)1586 config_delviews(struct config_view* p)
1587 {
1588 struct config_view* np;
1589 while(p) {
1590 np = p->next;
1591 config_delview(p);
1592 p = np;
1593 }
1594 }
1595
1596 void
config_del_strarray(char ** array,int num)1597 config_del_strarray(char** array, int num)
1598 {
1599 int i;
1600 if(!array)
1601 return;
1602 for(i=0; i<num; i++) {
1603 free(array[i]);
1604 }
1605 free(array);
1606 }
1607
1608 void
config_del_strbytelist(struct config_strbytelist * p)1609 config_del_strbytelist(struct config_strbytelist* p)
1610 {
1611 struct config_strbytelist* np;
1612 while(p) {
1613 np = p->next;
1614 free(p->str);
1615 free(p->str2);
1616 free(p);
1617 p = np;
1618 }
1619 }
1620
1621 void
config_delete(struct config_file * cfg)1622 config_delete(struct config_file* cfg)
1623 {
1624 if(!cfg) return;
1625 free(cfg->username);
1626 free(cfg->chrootdir);
1627 free(cfg->directory);
1628 free(cfg->logfile);
1629 free(cfg->pidfile);
1630 free(cfg->if_automatic_ports);
1631 free(cfg->target_fetch_policy);
1632 free(cfg->ssl_service_key);
1633 free(cfg->ssl_service_pem);
1634 free(cfg->tls_cert_bundle);
1635 config_delstrlist(cfg->tls_additional_port);
1636 config_delstrlist(cfg->tls_session_ticket_keys.first);
1637 free(cfg->tls_ciphers);
1638 free(cfg->tls_ciphersuites);
1639 free(cfg->http_endpoint);
1640 if(cfg->log_identity) {
1641 log_ident_revert_to_default();
1642 free(cfg->log_identity);
1643 }
1644 config_del_strarray(cfg->ifs, cfg->num_ifs);
1645 config_del_strarray(cfg->out_ifs, cfg->num_out_ifs);
1646 config_delstubs(cfg->stubs);
1647 config_delstubs(cfg->forwards);
1648 config_delauths(cfg->auths);
1649 config_delviews(cfg->views);
1650 config_delstrlist(cfg->donotqueryaddrs);
1651 config_delstrlist(cfg->root_hints);
1652 #ifdef CLIENT_SUBNET
1653 config_delstrlist(cfg->client_subnet);
1654 config_delstrlist(cfg->client_subnet_zone);
1655 #endif
1656 free(cfg->identity);
1657 free(cfg->version);
1658 free(cfg->http_user_agent);
1659 free(cfg->nsid_cfg_str);
1660 free(cfg->nsid);
1661 free(cfg->module_conf);
1662 free(cfg->outgoing_avail_ports);
1663 config_delstrlist(cfg->caps_whitelist);
1664 config_delstrlist(cfg->private_address);
1665 config_delstrlist(cfg->private_domain);
1666 config_delstrlist(cfg->auto_trust_anchor_file_list);
1667 config_delstrlist(cfg->trust_anchor_file_list);
1668 config_delstrlist(cfg->trusted_keys_file_list);
1669 config_delstrlist(cfg->trust_anchor_list);
1670 config_delstrlist(cfg->domain_insecure);
1671 config_deldblstrlist(cfg->acls);
1672 config_deldblstrlist(cfg->tcp_connection_limits);
1673 free(cfg->val_nsec3_key_iterations);
1674 config_deldblstrlist(cfg->local_zones);
1675 config_delstrlist(cfg->local_zones_nodefault);
1676 #ifdef USE_IPSET
1677 config_delstrlist(cfg->local_zones_ipset);
1678 #endif
1679 config_delstrlist(cfg->local_data);
1680 config_deltrplstrlist(cfg->local_zone_overrides);
1681 config_del_strarray(cfg->tagname, cfg->num_tags);
1682 config_del_strbytelist(cfg->local_zone_tags);
1683 config_del_strbytelist(cfg->respip_tags);
1684 config_deldblstrlist(cfg->acl_view);
1685 config_del_strbytelist(cfg->acl_tags);
1686 config_deltrplstrlist(cfg->acl_tag_actions);
1687 config_deltrplstrlist(cfg->acl_tag_datas);
1688 config_deldblstrlist(cfg->interface_actions);
1689 config_deldblstrlist(cfg->interface_view);
1690 config_del_strbytelist(cfg->interface_tags);
1691 config_deltrplstrlist(cfg->interface_tag_actions);
1692 config_deltrplstrlist(cfg->interface_tag_datas);
1693 config_delstrlist(cfg->control_ifs.first);
1694 config_deldblstrlist(cfg->wait_limit_netblock);
1695 config_deldblstrlist(cfg->wait_limit_cookie_netblock);
1696 free(cfg->server_key_file);
1697 free(cfg->server_cert_file);
1698 free(cfg->control_key_file);
1699 free(cfg->control_cert_file);
1700 free(cfg->nat64_prefix);
1701 free(cfg->dns64_prefix);
1702 config_delstrlist(cfg->dns64_ignore_aaaa);
1703 free(cfg->dnstap_socket_path);
1704 free(cfg->dnstap_ip);
1705 free(cfg->dnstap_tls_server_name);
1706 free(cfg->dnstap_tls_cert_bundle);
1707 free(cfg->dnstap_tls_client_key_file);
1708 free(cfg->dnstap_tls_client_cert_file);
1709 free(cfg->dnstap_identity);
1710 free(cfg->dnstap_version);
1711 config_deldblstrlist(cfg->ratelimit_for_domain);
1712 config_deldblstrlist(cfg->ratelimit_below_domain);
1713 config_delstrlist(cfg->python_script);
1714 config_delstrlist(cfg->dynlib_file);
1715 config_deldblstrlist(cfg->edns_client_strings);
1716 config_delstrlist(cfg->proxy_protocol_port);
1717 #ifdef USE_IPSECMOD
1718 free(cfg->ipsecmod_hook);
1719 config_delstrlist(cfg->ipsecmod_whitelist);
1720 #endif
1721 #ifdef USE_CACHEDB
1722 free(cfg->cachedb_backend);
1723 free(cfg->cachedb_secret);
1724 #ifdef USE_REDIS
1725 free(cfg->redis_server_host);
1726 free(cfg->redis_server_path);
1727 free(cfg->redis_server_password);
1728 #endif /* USE_REDIS */
1729 #endif /* USE_CACHEDB */
1730 #ifdef USE_IPSET
1731 free(cfg->ipset_name_v4);
1732 free(cfg->ipset_name_v6);
1733 #endif
1734 free(cfg);
1735 }
1736
1737 static void
init_cookie_secret(uint8_t * cookie_secret,size_t cookie_secret_len)1738 init_cookie_secret(uint8_t* cookie_secret, size_t cookie_secret_len)
1739 {
1740 struct ub_randstate *rand = ub_initstate(NULL);
1741
1742 if (!rand)
1743 fatal_exit("could not init random generator");
1744 while (cookie_secret_len) {
1745 *cookie_secret++ = (uint8_t)ub_random(rand);
1746 cookie_secret_len--;
1747 }
1748 ub_randfree(rand);
1749 }
1750
1751 static void
init_outgoing_availports(int * a,int num)1752 init_outgoing_availports(int* a, int num)
1753 {
1754 /* generated with make iana_update */
1755 const int iana_assigned[] = {
1756 #include "util/iana_ports.inc"
1757 -1 }; /* end marker to put behind trailing comma */
1758
1759 int i;
1760 /* do not use <1024, that could be trouble with the system, privs */
1761 for(i=1024; i<num; i++) {
1762 a[i] = i;
1763 }
1764 /* create empty spot at 49152 to keep ephemeral ports available
1765 * to other programs */
1766 for(i=49152; i<49152+256; i++)
1767 a[i] = 0;
1768 /* pick out all the IANA assigned ports */
1769 for(i=0; iana_assigned[i]!=-1; i++) {
1770 if(iana_assigned[i] < num)
1771 a[iana_assigned[i]] = 0;
1772 }
1773 }
1774
1775 int
cfg_mark_ports(const char * str,int allow,int * avail,int num)1776 cfg_mark_ports(const char* str, int allow, int* avail, int num)
1777 {
1778 char* mid = strchr(str, '-');
1779 #ifdef DISABLE_EXPLICIT_PORT_RANDOMISATION
1780 log_warn("Explicit port randomisation disabled, ignoring "
1781 "outgoing-port-permit and outgoing-port-avoid configuration "
1782 "options");
1783 #endif
1784 if(!mid) {
1785 int port = atoi(str);
1786 if(port < 0) {
1787 log_err("port number is negative: %d", port);
1788 return 0;
1789 }
1790 if(port == 0 && strcmp(str, "0") != 0) {
1791 log_err("cannot parse port number '%s'", str);
1792 return 0;
1793 }
1794 if(port < num)
1795 avail[port] = (allow?port:0);
1796 } else {
1797 int i, low, high = atoi(mid+1);
1798 char buf[16];
1799 if(high < 0) {
1800 log_err("port number is negative: %d", high);
1801 return 0;
1802 }
1803 if(high == 0 && strcmp(mid+1, "0") != 0) {
1804 log_err("cannot parse port number '%s'", mid+1);
1805 return 0;
1806 }
1807 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) {
1808 log_err("cannot parse port number '%s'", str);
1809 return 0;
1810 }
1811 if(mid > str)
1812 memcpy(buf, str, (size_t)(mid-str));
1813 buf[mid-str] = 0;
1814 low = atoi(buf);
1815 if(low < 0) {
1816 log_err("port number is negative: %d", low);
1817 return 0;
1818 }
1819 if(low == 0 && strcmp(buf, "0") != 0) {
1820 log_err("cannot parse port number '%s'", buf);
1821 return 0;
1822 }
1823 if(high > num) {
1824 /* Stop very high values from taking a long time. */
1825 high = num;
1826 }
1827 for(i=low; i<=high; i++) {
1828 if(i < num)
1829 avail[i] = (allow?i:0);
1830 }
1831 return 1;
1832 }
1833 return 1;
1834 }
1835
1836 int
cfg_scan_ports(int * avail,int num)1837 cfg_scan_ports(int* avail, int num)
1838 {
1839 int i;
1840 int count = 0;
1841 for(i=0; i<num; i++) {
1842 if(avail[i])
1843 count++;
1844 }
1845 return count;
1846 }
1847
cfg_condense_ports(struct config_file * cfg,int ** avail)1848 int cfg_condense_ports(struct config_file* cfg, int** avail)
1849 {
1850 int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536);
1851 int i, at = 0;
1852 *avail = NULL;
1853 if(num == 0)
1854 return 0;
1855 *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int));
1856 if(!*avail)
1857 return 0;
1858 for(i=0; i<65536; i++) {
1859 if(cfg->outgoing_avail_ports[i])
1860 (*avail)[at++] = cfg->outgoing_avail_ports[i];
1861 }
1862 log_assert(at == num);
1863 return num;
1864 }
1865
cfg_apply_local_port_policy(struct config_file * cfg,int num)1866 void cfg_apply_local_port_policy(struct config_file* cfg, int num) {
1867 (void)cfg;
1868 (void)num;
1869 #ifdef USE_LINUX_IP_LOCAL_PORT_RANGE
1870 {
1871 int i = 0;
1872 FILE* range_fd;
1873 if ((range_fd = fopen(LINUX_IP_LOCAL_PORT_RANGE_PATH, "r")) != NULL) {
1874 int min_port = 0;
1875 int max_port = num - 1;
1876 if (fscanf(range_fd, "%d %d", &min_port, &max_port) == 2) {
1877 for(i=0; i<min_port; i++) {
1878 cfg->outgoing_avail_ports[i] = 0;
1879 }
1880 for(i=max_port+1; i<num; i++) {
1881 cfg->outgoing_avail_ports[i] = 0;
1882 }
1883 } else {
1884 log_err("unexpected port range in %s",
1885 LINUX_IP_LOCAL_PORT_RANGE_PATH);
1886 }
1887 fclose(range_fd);
1888 } else {
1889 log_err("failed to read from file: %s (%s)",
1890 LINUX_IP_LOCAL_PORT_RANGE_PATH,
1891 strerror(errno));
1892 }
1893 }
1894 #endif
1895 }
1896
1897 /** print error with file and line number */
ub_c_error_va_list(const char * fmt,va_list args)1898 static void ub_c_error_va_list(const char *fmt, va_list args)
1899 {
1900 cfg_parser->errors++;
1901 fprintf(stderr, "%s:%d: error: ", cfg_parser->filename,
1902 cfg_parser->line);
1903 vfprintf(stderr, fmt, args);
1904 fprintf(stderr, "\n");
1905 }
1906
1907 /** print error with file and line number */
ub_c_error_msg(const char * fmt,...)1908 void ub_c_error_msg(const char* fmt, ...)
1909 {
1910 va_list args;
1911 va_start(args, fmt);
1912 ub_c_error_va_list(fmt, args);
1913 va_end(args);
1914 }
1915
ub_c_error(const char * str)1916 void ub_c_error(const char *str)
1917 {
1918 cfg_parser->errors++;
1919 if(strcmp(str, "syntax error")==0 && cfg_parser->started_toplevel ==0)
1920 str = "syntax error, is there no section start after an "
1921 "include-toplevel directive perhaps.";
1922 fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename,
1923 cfg_parser->line, str);
1924 }
1925
ub_c_wrap(void)1926 int ub_c_wrap(void)
1927 {
1928 return 1;
1929 }
1930
cfg_strlist_append(struct config_strlist_head * list,char * item)1931 int cfg_strlist_append(struct config_strlist_head* list, char* item)
1932 {
1933 struct config_strlist *s;
1934 if(!item || !list) {
1935 free(item);
1936 return 0;
1937 }
1938 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1939 if(!s) {
1940 free(item);
1941 return 0;
1942 }
1943 s->str = item;
1944 s->next = NULL;
1945 if(list->last)
1946 list->last->next = s;
1947 else
1948 list->first = s;
1949 list->last = s;
1950 return 1;
1951 }
1952
1953 int
cfg_region_strlist_insert(struct regional * region,struct config_strlist ** head,char * item)1954 cfg_region_strlist_insert(struct regional* region,
1955 struct config_strlist** head, char* item)
1956 {
1957 struct config_strlist *s;
1958 if(!item || !head)
1959 return 0;
1960 s = (struct config_strlist*)regional_alloc_zero(region,
1961 sizeof(struct config_strlist));
1962 if(!s)
1963 return 0;
1964 s->str = item;
1965 s->next = *head;
1966 *head = s;
1967 return 1;
1968 }
1969
1970 struct config_strlist*
cfg_strlist_find(struct config_strlist * head,const char * item)1971 cfg_strlist_find(struct config_strlist* head, const char *item)
1972 {
1973 struct config_strlist *s = head;
1974 if(!head){
1975 return NULL;
1976 }
1977 while(s) {
1978 if(strcmp(s->str, item) == 0) {
1979 return s;
1980 }
1981 s = s->next;
1982 }
1983 return NULL;
1984 }
1985
1986 int
cfg_strlist_insert(struct config_strlist ** head,char * item)1987 cfg_strlist_insert(struct config_strlist** head, char* item)
1988 {
1989 struct config_strlist *s;
1990 if(!item || !head) {
1991 free(item);
1992 return 0;
1993 }
1994 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1995 if(!s) {
1996 free(item);
1997 return 0;
1998 }
1999 s->str = item;
2000 s->next = *head;
2001 *head = s;
2002 return 1;
2003 }
2004
2005 int
cfg_strlist_append_ex(struct config_strlist ** head,char * item)2006 cfg_strlist_append_ex(struct config_strlist** head, char* item)
2007 {
2008 struct config_strlist *s;
2009 if(!item || !head)
2010 return 0;
2011 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
2012 if(!s)
2013 return 0;
2014 s->str = item;
2015 s->next = NULL;
2016
2017 if (*head==NULL) {
2018 *head = s;
2019 } else {
2020 struct config_strlist *last = *head;
2021 while (last->next!=NULL) {
2022 last = last->next;
2023 }
2024 last->next = s;
2025 }
2026
2027 return 1;
2028 }
2029
2030 int
cfg_str2list_insert(struct config_str2list ** head,char * item,char * i2)2031 cfg_str2list_insert(struct config_str2list** head, char* item, char* i2)
2032 {
2033 struct config_str2list *s;
2034 if(!item || !i2 || !head) {
2035 free(item);
2036 free(i2);
2037 return 0;
2038 }
2039 s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list));
2040 if(!s) {
2041 free(item);
2042 free(i2);
2043 return 0;
2044 }
2045 s->str = item;
2046 s->str2 = i2;
2047 s->next = *head;
2048 *head = s;
2049 return 1;
2050 }
2051
2052 int
cfg_str3list_insert(struct config_str3list ** head,char * item,char * i2,char * i3)2053 cfg_str3list_insert(struct config_str3list** head, char* item, char* i2,
2054 char* i3)
2055 {
2056 struct config_str3list *s;
2057 if(!item || !i2 || !i3 || !head)
2058 return 0;
2059 s = (struct config_str3list*)calloc(1, sizeof(struct config_str3list));
2060 if(!s)
2061 return 0;
2062 s->str = item;
2063 s->str2 = i2;
2064 s->str3 = i3;
2065 s->next = *head;
2066 *head = s;
2067 return 1;
2068 }
2069
2070 int
cfg_strbytelist_insert(struct config_strbytelist ** head,char * item,uint8_t * i2,size_t i2len)2071 cfg_strbytelist_insert(struct config_strbytelist** head, char* item,
2072 uint8_t* i2, size_t i2len)
2073 {
2074 struct config_strbytelist* s;
2075 if(!item || !i2 || !head)
2076 return 0;
2077 s = (struct config_strbytelist*)calloc(1, sizeof(*s));
2078 if(!s)
2079 return 0;
2080 s->str = item;
2081 s->str2 = i2;
2082 s->str2len = i2len;
2083 s->next = *head;
2084 *head = s;
2085 return 1;
2086 }
2087
2088 time_t
cfg_convert_timeval(const char * str)2089 cfg_convert_timeval(const char* str)
2090 {
2091 time_t t;
2092 struct tm tm;
2093 memset(&tm, 0, sizeof(tm));
2094 if(strlen(str) < 14)
2095 return 0;
2096 if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon,
2097 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6)
2098 return 0;
2099 tm.tm_year -= 1900;
2100 tm.tm_mon--;
2101 /* Check values */
2102 if (tm.tm_year < 70) return 0;
2103 if (tm.tm_mon < 0 || tm.tm_mon > 11) return 0;
2104 if (tm.tm_mday < 1 || tm.tm_mday > 31) return 0;
2105 if (tm.tm_hour < 0 || tm.tm_hour > 23) return 0;
2106 if (tm.tm_min < 0 || tm.tm_min > 59) return 0;
2107 if (tm.tm_sec < 0 || tm.tm_sec > 59) return 0;
2108 /* call ldns conversion function */
2109 t = sldns_mktime_from_utc(&tm);
2110 return t;
2111 }
2112
2113 int
cfg_count_numbers(const char * s)2114 cfg_count_numbers(const char* s)
2115 {
2116 /* format ::= (sp num)+ sp */
2117 /* num ::= [-](0-9)+ */
2118 /* sp ::= (space|tab)* */
2119 int num = 0;
2120 while(*s) {
2121 while(*s && isspace((unsigned char)*s))
2122 s++;
2123 if(!*s) /* end of string */
2124 break;
2125 if(*s == '-')
2126 s++;
2127 if(!*s) /* only - not allowed */
2128 return 0;
2129 if(!isdigit((unsigned char)*s)) /* bad character */
2130 return 0;
2131 while(*s && isdigit((unsigned char)*s))
2132 s++;
2133 num++;
2134 }
2135 return num;
2136 }
2137
2138 /** all digit number */
isalldigit(const char * str,size_t l)2139 static int isalldigit(const char* str, size_t l)
2140 {
2141 size_t i;
2142 for(i=0; i<l; i++)
2143 if(!isdigit((unsigned char)str[i]))
2144 return 0;
2145 return 1;
2146 }
2147
2148 int
cfg_parse_memsize(const char * str,size_t * res)2149 cfg_parse_memsize(const char* str, size_t* res)
2150 {
2151 size_t len;
2152 size_t mult = 1;
2153 if(!str || (len=(size_t)strlen(str)) == 0) {
2154 log_err("not a size: '%s'", str);
2155 return 0;
2156 }
2157 if(isalldigit(str, len)) {
2158 *res = (size_t)atol(str);
2159 return 1;
2160 }
2161 /* check appended num */
2162 while(len>0 && str[len-1]==' ')
2163 len--;
2164 if(len > 1 && str[len-1] == 'b')
2165 len--;
2166 else if(len > 1 && str[len-1] == 'B')
2167 len--;
2168
2169 if(len > 1 && tolower((unsigned char)str[len-1]) == 'g')
2170 mult = 1024*1024*1024;
2171 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm')
2172 mult = 1024*1024;
2173 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k')
2174 mult = 1024;
2175 else if(len > 0 && isdigit((unsigned char)str[len-1]))
2176 mult = 1;
2177 else {
2178 log_err("unknown size specifier: '%s'", str);
2179 return 0;
2180 }
2181 while(len>1 && str[len-2]==' ')
2182 len--;
2183
2184 if(!isalldigit(str, len-1)) {
2185 log_err("unknown size specifier: '%s'", str);
2186 return 0;
2187 }
2188 *res = ((size_t)atol(str)) * mult;
2189 return 1;
2190 }
2191
2192 int
find_tag_id(struct config_file * cfg,const char * tag)2193 find_tag_id(struct config_file* cfg, const char* tag)
2194 {
2195 int i;
2196 for(i=0; i<cfg->num_tags; i++) {
2197 if(strcmp(cfg->tagname[i], tag) == 0)
2198 return i;
2199 }
2200 return -1;
2201 }
2202
2203 int
config_add_tag(struct config_file * cfg,const char * tag)2204 config_add_tag(struct config_file* cfg, const char* tag)
2205 {
2206 char** newarray;
2207 char* newtag;
2208 if(find_tag_id(cfg, tag) != -1)
2209 return 1; /* nothing to do */
2210 newarray = (char**)malloc(sizeof(char*)*(cfg->num_tags+1));
2211 if(!newarray)
2212 return 0;
2213 newtag = strdup(tag);
2214 if(!newtag) {
2215 free(newarray);
2216 return 0;
2217 }
2218 if(cfg->tagname) {
2219 memcpy(newarray, cfg->tagname, sizeof(char*)*cfg->num_tags);
2220 free(cfg->tagname);
2221 }
2222 newarray[cfg->num_tags++] = newtag;
2223 cfg->tagname = newarray;
2224 return 1;
2225 }
2226
2227 /** set a bit in a bit array */
2228 static void
cfg_set_bit(uint8_t * bitlist,size_t len,int id)2229 cfg_set_bit(uint8_t* bitlist, size_t len, int id)
2230 {
2231 int pos = id/8;
2232 log_assert((size_t)pos < len);
2233 (void)len;
2234 bitlist[pos] |= 1<<(id%8);
2235 }
2236
config_parse_taglist(struct config_file * cfg,char * str,size_t * listlen)2237 uint8_t* config_parse_taglist(struct config_file* cfg, char* str,
2238 size_t* listlen)
2239 {
2240 uint8_t* taglist = NULL;
2241 size_t len = 0;
2242 char* p, *s;
2243
2244 /* allocate */
2245 if(cfg->num_tags == 0) {
2246 log_err("parse taglist, but no tags defined");
2247 return 0;
2248 }
2249 len = (size_t)(cfg->num_tags+7)/8;
2250 taglist = calloc(1, len);
2251 if(!taglist) {
2252 log_err("out of memory");
2253 return 0;
2254 }
2255
2256 /* parse */
2257 s = str;
2258 while((p=strsep(&s, " \t\n")) != NULL) {
2259 if(*p) {
2260 int id = find_tag_id(cfg, p);
2261 /* set this bit in the bitlist */
2262 if(id == -1) {
2263 log_err("unknown tag: %s", p);
2264 free(taglist);
2265 return 0;
2266 }
2267 cfg_set_bit(taglist, len, id);
2268 }
2269 }
2270
2271 *listlen = len;
2272 return taglist;
2273 }
2274
cfg_parse_nsid(const char * str,uint16_t * nsid_len)2275 uint8_t* cfg_parse_nsid(const char* str, uint16_t* nsid_len)
2276 {
2277 uint8_t* nsid = NULL;
2278
2279 if (strncasecmp(str, "ascii_", 6) == 0) {
2280 if ((nsid = (uint8_t *)strdup(str + 6)))
2281 *nsid_len = strlen(str + 6);
2282
2283 } else if (strlen(str) % 2) {
2284 ; /* hex string has even number of characters */
2285 }
2286
2287 else if (*str && (nsid = calloc(1, strlen(str) / 2))) {
2288 const char *ch;
2289 uint8_t *dp;
2290
2291 for ( ch = str, dp = nsid
2292 ; isxdigit(ch[0]) && isxdigit(ch[1])
2293 ; ch += 2, dp++) {
2294 *dp = (uint8_t)sldns_hexdigit_to_int(ch[0]) * 16;
2295 *dp += (uint8_t)sldns_hexdigit_to_int(ch[1]);
2296 }
2297 if (*ch) {
2298 free(nsid);
2299 nsid = NULL;
2300 } else
2301 *nsid_len = strlen(str) / 2;
2302 }
2303 return nsid;
2304 }
2305
2306
config_taglist2str(struct config_file * cfg,uint8_t * taglist,size_t taglen)2307 char* config_taglist2str(struct config_file* cfg, uint8_t* taglist,
2308 size_t taglen)
2309 {
2310 char buf[10240];
2311 size_t i, j, len = 0;
2312 buf[0] = 0;
2313 for(i=0; i<taglen; i++) {
2314 if(taglist[i] == 0)
2315 continue;
2316 for(j=0; j<8; j++) {
2317 if((taglist[i] & (1<<j)) != 0) {
2318 size_t id = i*8 + j;
2319 snprintf(buf+len, sizeof(buf)-len, "%s%s",
2320 (len==0?"":" "), cfg->tagname[id]);
2321 len += strlen(buf+len);
2322 }
2323 }
2324 }
2325 return strdup(buf);
2326 }
2327
taglist_intersect(uint8_t * list1,size_t list1len,const uint8_t * list2,size_t list2len)2328 int taglist_intersect(uint8_t* list1, size_t list1len, const uint8_t* list2,
2329 size_t list2len)
2330 {
2331 size_t i;
2332 if(!list1 || !list2)
2333 return 0;
2334 for(i=0; i<list1len && i<list2len; i++) {
2335 if((list1[i] & list2[i]) != 0)
2336 return 1;
2337 }
2338 return 0;
2339 }
2340
2341 void
config_apply(struct config_file * config)2342 config_apply(struct config_file* config)
2343 {
2344 MAX_TTL = (time_t)config->max_ttl;
2345 MIN_TTL = (time_t)config->min_ttl;
2346 SERVE_EXPIRED = config->serve_expired;
2347 SERVE_EXPIRED_TTL = (time_t)config->serve_expired_ttl;
2348 SERVE_EXPIRED_REPLY_TTL = (time_t)config->serve_expired_reply_ttl;
2349 SERVE_ORIGINAL_TTL = config->serve_original_ttl;
2350 MAX_NEG_TTL = (time_t)config->max_negative_ttl;
2351 MIN_NEG_TTL = (time_t)config->min_negative_ttl;
2352 RTT_MIN_TIMEOUT = config->infra_cache_min_rtt;
2353 RTT_MAX_TIMEOUT = config->infra_cache_max_rtt;
2354 EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size;
2355 MINIMAL_RESPONSES = config->minimal_responses;
2356 RRSET_ROUNDROBIN = config->rrset_roundrobin;
2357 LOG_TAG_QUERYREPLY = config->log_tag_queryreply;
2358 UNKNOWN_SERVER_NICENESS = config->unknown_server_time_limit;
2359 USEFUL_SERVER_TOP_TIMEOUT = RTT_MAX_TIMEOUT;
2360 BLACKLIST_PENALTY = USEFUL_SERVER_TOP_TIMEOUT*4;
2361 log_set_time_asc(config->log_time_ascii);
2362 autr_permit_small_holddown = config->permit_small_holddown;
2363 stream_wait_max = config->stream_wait_size;
2364 http2_query_buffer_max = config->http_query_buffer_size;
2365 http2_response_buffer_max = config->http_response_buffer_size;
2366 }
2367
config_lookup_uid(struct config_file * cfg)2368 void config_lookup_uid(struct config_file* cfg)
2369 {
2370 #ifdef HAVE_GETPWNAM
2371 /* translate username into uid and gid */
2372 if(cfg->username && cfg->username[0]) {
2373 struct passwd *pwd;
2374 if((pwd = getpwnam(cfg->username)) != NULL) {
2375 cfg_uid = pwd->pw_uid;
2376 cfg_gid = pwd->pw_gid;
2377 }
2378 }
2379 #else
2380 (void)cfg;
2381 #endif
2382 }
2383
2384 /**
2385 * Calculate string length of full pathname in original filesys
2386 * @param fname: the path name to convert.
2387 * Must not be null or empty.
2388 * @param cfg: config struct for chroot and chdir (if set).
2389 * @param use_chdir: if false, only chroot is applied.
2390 * @return length of string.
2391 * remember to allocate one more for 0 at end in mallocs.
2392 */
2393 static size_t
strlen_after_chroot(const char * fname,struct config_file * cfg,int use_chdir)2394 strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
2395 {
2396 size_t len = 0;
2397 int slashit = 0;
2398 if(cfg->chrootdir && cfg->chrootdir[0] &&
2399 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
2400 /* already full pathname, return it */
2401 return strlen(fname);
2402 }
2403 /* chroot */
2404 if(cfg->chrootdir && cfg->chrootdir[0]) {
2405 /* start with chrootdir */
2406 len += strlen(cfg->chrootdir);
2407 slashit = 1;
2408 }
2409 /* chdir */
2410 #ifdef UB_ON_WINDOWS
2411 if(fname[0] != 0 && fname[1] == ':') {
2412 /* full path, no chdir */
2413 } else
2414 #endif
2415 if(fname[0] == '/' || !use_chdir) {
2416 /* full path, no chdir */
2417 } else if(cfg->directory && cfg->directory[0]) {
2418 /* prepend chdir */
2419 if(slashit && cfg->directory[0] != '/')
2420 len++;
2421 if(cfg->chrootdir && cfg->chrootdir[0] &&
2422 strncmp(cfg->chrootdir, cfg->directory,
2423 strlen(cfg->chrootdir)) == 0)
2424 len += strlen(cfg->directory)-strlen(cfg->chrootdir);
2425 else len += strlen(cfg->directory);
2426 slashit = 1;
2427 }
2428 /* fname */
2429 if(slashit && fname[0] != '/')
2430 len++;
2431 len += strlen(fname);
2432 return len;
2433 }
2434
2435 char*
fname_after_chroot(const char * fname,struct config_file * cfg,int use_chdir)2436 fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
2437 {
2438 size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1;
2439 int slashit = 0;
2440 char* buf = (char*)malloc(len);
2441 if(!buf)
2442 return NULL;
2443 buf[0] = 0;
2444 /* is fname already in chroot ? */
2445 if(cfg->chrootdir && cfg->chrootdir[0] &&
2446 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
2447 /* already full pathname, return it */
2448 (void)strlcpy(buf, fname, len);
2449 buf[len-1] = 0;
2450 return buf;
2451 }
2452 /* chroot */
2453 if(cfg->chrootdir && cfg->chrootdir[0]) {
2454 /* start with chrootdir */
2455 (void)strlcpy(buf, cfg->chrootdir, len);
2456 slashit = 1;
2457 }
2458 #ifdef UB_ON_WINDOWS
2459 if(fname[0] != 0 && fname[1] == ':') {
2460 /* full path, no chdir */
2461 } else
2462 #endif
2463 /* chdir */
2464 if(fname[0] == '/' || !use_chdir) {
2465 /* full path, no chdir */
2466 } else if(cfg->directory && cfg->directory[0]) {
2467 /* prepend chdir */
2468 if(slashit && cfg->directory[0] != '/')
2469 (void)strlcat(buf, "/", len);
2470 /* is the directory already in the chroot? */
2471 if(cfg->chrootdir && cfg->chrootdir[0] &&
2472 strncmp(cfg->chrootdir, cfg->directory,
2473 strlen(cfg->chrootdir)) == 0)
2474 (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir),
2475 len);
2476 else (void)strlcat(buf, cfg->directory, len);
2477 slashit = 1;
2478 }
2479 /* fname */
2480 if(slashit && fname[0] != '/')
2481 (void)strlcat(buf, "/", len);
2482 (void)strlcat(buf, fname, len);
2483 buf[len-1] = 0;
2484 return buf;
2485 }
2486
2487 /** return next space character in string */
next_space_pos(const char * str)2488 static char* next_space_pos(const char* str)
2489 {
2490 char* sp = strchr(str, ' ');
2491 char* tab = strchr(str, '\t');
2492 if(!tab && !sp)
2493 return NULL;
2494 if(!sp) return tab;
2495 if(!tab) return sp;
2496 return (sp<tab)?sp:tab;
2497 }
2498
2499 /** return last space character in string */
last_space_pos(const char * str)2500 static char* last_space_pos(const char* str)
2501 {
2502 char* sp = strrchr(str, ' ');
2503 char* tab = strrchr(str, '\t');
2504 if(!tab && !sp)
2505 return NULL;
2506 if(!sp) return tab;
2507 if(!tab) return sp;
2508 return (sp>tab)?sp:tab;
2509 }
2510
2511 int
cfg_parse_local_zone(struct config_file * cfg,const char * val)2512 cfg_parse_local_zone(struct config_file* cfg, const char* val)
2513 {
2514 const char *type, *name_end, *name;
2515 char buf[256];
2516
2517 /* parse it as: [zone_name] [between stuff] [zone_type] */
2518 name = val;
2519 while(*name && isspace((unsigned char)*name))
2520 name++;
2521 if(!*name) {
2522 log_err("syntax error: too short: %s", val);
2523 return 0;
2524 }
2525 name_end = next_space_pos(name);
2526 if(!name_end || !*name_end) {
2527 log_err("syntax error: expected zone type: %s", val);
2528 return 0;
2529 }
2530 if (name_end - name > 255) {
2531 log_err("syntax error: bad zone name: %s", val);
2532 return 0;
2533 }
2534 (void)strlcpy(buf, name, sizeof(buf));
2535 buf[name_end-name] = '\0';
2536
2537 type = last_space_pos(name_end);
2538 while(type && *type && isspace((unsigned char)*type))
2539 type++;
2540 if(!type || !*type) {
2541 log_err("syntax error: expected zone type: %s", val);
2542 return 0;
2543 }
2544
2545 if(strcmp(type, "nodefault")==0) {
2546 return cfg_strlist_insert(&cfg->local_zones_nodefault,
2547 strdup(name));
2548 #ifdef USE_IPSET
2549 } else if(strcmp(type, "ipset")==0) {
2550 return cfg_strlist_insert(&cfg->local_zones_ipset,
2551 strdup(name));
2552 #endif
2553 } else {
2554 return cfg_str2list_insert(&cfg->local_zones, strdup(buf),
2555 strdup(type));
2556 }
2557 }
2558
cfg_ptr_reverse(char * str)2559 char* cfg_ptr_reverse(char* str)
2560 {
2561 char* ip, *ip_end;
2562 char* name;
2563 char* result;
2564 char buf[1024];
2565 struct sockaddr_storage addr;
2566 socklen_t addrlen;
2567
2568 /* parse it as: [IP] [between stuff] [name] */
2569 ip = str;
2570 while(*ip && isspace((unsigned char)*ip))
2571 ip++;
2572 if(!*ip) {
2573 log_err("syntax error: too short: %s", str);
2574 return NULL;
2575 }
2576 ip_end = next_space_pos(ip);
2577 if(!ip_end || !*ip_end) {
2578 log_err("syntax error: expected name: %s", str);
2579 return NULL;
2580 }
2581
2582 name = last_space_pos(ip_end);
2583 if(!name || !*name) {
2584 log_err("syntax error: expected name: %s", str);
2585 return NULL;
2586 }
2587
2588 sscanf(ip, "%100s", buf);
2589 buf[sizeof(buf)-1]=0;
2590
2591 if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) {
2592 log_err("syntax error: cannot parse address: %s", str);
2593 return NULL;
2594 }
2595
2596 /* reverse IPv4:
2597 * ddd.ddd.ddd.ddd.in-addr-arpa.
2598 * IPv6: (h.){32}.ip6.arpa. */
2599
2600 if(addr_is_ip6(&addr, addrlen)) {
2601 uint8_t ad[16];
2602 const char* hex = "0123456789abcdef";
2603 char *p = buf;
2604 int i;
2605 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr,
2606 sizeof(ad));
2607 for(i=15; i>=0; i--) {
2608 uint8_t b = ad[i];
2609 *p++ = hex[ (b&0x0f) ];
2610 *p++ = '.';
2611 *p++ = hex[ (b&0xf0) >> 4 ];
2612 *p++ = '.';
2613 }
2614 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. ");
2615 } else {
2616 uint8_t ad[4];
2617 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr,
2618 sizeof(ad));
2619 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ",
2620 (unsigned)ad[3], (unsigned)ad[2],
2621 (unsigned)ad[1], (unsigned)ad[0]);
2622 }
2623
2624 /* printed the reverse address, now the between goop and name on end */
2625 while(*ip_end && isspace((unsigned char)*ip_end))
2626 ip_end++;
2627 if(name>ip_end) {
2628 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s",
2629 (int)(name-ip_end), ip_end);
2630 }
2631 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name);
2632
2633 result = strdup(buf);
2634 if(!result) {
2635 log_err("out of memory parsing %s", str);
2636 return NULL;
2637 }
2638 return result;
2639 }
2640
2641 #ifdef UB_ON_WINDOWS
2642 char*
w_lookup_reg_str(const char * key,const char * name)2643 w_lookup_reg_str(const char* key, const char* name)
2644 {
2645 HKEY hk = NULL;
2646 DWORD type = 0;
2647 BYTE buf[1024];
2648 DWORD len = (DWORD)sizeof(buf);
2649 LONG ret;
2650 char* result = NULL;
2651 ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk);
2652 if(ret == ERROR_FILE_NOT_FOUND)
2653 return NULL; /* key does not exist */
2654 else if(ret != ERROR_SUCCESS) {
2655 log_err("RegOpenKeyEx failed");
2656 return NULL;
2657 }
2658 ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len);
2659 if(RegCloseKey(hk))
2660 log_err("RegCloseKey");
2661 if(ret == ERROR_FILE_NOT_FOUND)
2662 return NULL; /* name does not exist */
2663 else if(ret != ERROR_SUCCESS) {
2664 log_err("RegQueryValueEx failed");
2665 return NULL;
2666 }
2667 if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) {
2668 buf[sizeof(buf)-1] = 0;
2669 buf[sizeof(buf)-2] = 0; /* for multi_sz */
2670 result = strdup((char*)buf);
2671 if(!result) log_err("out of memory");
2672 }
2673 return result;
2674 }
2675
w_config_adjust_directory(struct config_file * cfg)2676 void w_config_adjust_directory(struct config_file* cfg)
2677 {
2678 if(cfg->directory && cfg->directory[0]) {
2679 TCHAR dirbuf[2*MAX_PATH+4];
2680 if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) {
2681 /* get executable path, and if that contains
2682 * directories, snip off the filename part */
2683 dirbuf[0] = 0;
2684 if(!GetModuleFileName(NULL, dirbuf, MAX_PATH))
2685 log_err("could not GetModuleFileName");
2686 if(strrchr(dirbuf, '\\')) {
2687 (strrchr(dirbuf, '\\'))[0] = 0;
2688 } else log_err("GetModuleFileName had no path");
2689 if(dirbuf[0]) {
2690 /* adjust directory for later lookups to work*/
2691 free(cfg->directory);
2692 cfg->directory = memdup(dirbuf, strlen(dirbuf)+1);
2693 }
2694 }
2695 }
2696 }
2697 #endif /* UB_ON_WINDOWS */
2698
options_remote_is_address(struct config_file * cfg)2699 int options_remote_is_address(struct config_file* cfg)
2700 {
2701 if(!cfg->remote_control_enable) return 0;
2702 if(!cfg->control_ifs.first) return 1;
2703 if(!cfg->control_ifs.first->str) return 1;
2704 if(cfg->control_ifs.first->str[0] == 0) return 1;
2705 return (cfg->control_ifs.first->str[0] != '/');
2706 }
2707
2708 /** see if interface is https, its port number == the https port number */
2709 int
if_is_https(const char * ifname,const char * port,int https_port)2710 if_is_https(const char* ifname, const char* port, int https_port)
2711 {
2712 char* p = strchr(ifname, '@');
2713 if(!p && atoi(port) == https_port)
2714 return 1;
2715 if(p && atoi(p+1) == https_port)
2716 return 1;
2717 return 0;
2718 }
2719
2720 /** see if config contains https turned on */
cfg_has_https(struct config_file * cfg)2721 int cfg_has_https(struct config_file* cfg)
2722 {
2723 int i;
2724 char portbuf[32];
2725 snprintf(portbuf, sizeof(portbuf), "%d", cfg->port);
2726 for(i = 0; i<cfg->num_ifs; i++) {
2727 if(if_is_https(cfg->ifs[i], portbuf, cfg->https_port))
2728 return 1;
2729 }
2730 return 0;
2731 }
2732
2733 /** see if interface is PROXYv2, its port number == the proxy port number */
2734 int
if_is_pp2(const char * ifname,const char * port,struct config_strlist * proxy_protocol_port)2735 if_is_pp2(const char* ifname, const char* port,
2736 struct config_strlist* proxy_protocol_port)
2737 {
2738 struct config_strlist* s;
2739 char* p = strchr(ifname, '@');
2740 for(s = proxy_protocol_port; s; s = s->next) {
2741 if(p && atoi(p+1) == atoi(s->str))
2742 return 1;
2743 if(!p && atoi(port) == atoi(s->str))
2744 return 1;
2745 }
2746 return 0;
2747 }
2748
2749 /** see if interface is DNSCRYPT, its port number == the dnscrypt port number */
2750 int
if_is_dnscrypt(const char * ifname,const char * port,int dnscrypt_port)2751 if_is_dnscrypt(const char* ifname, const char* port, int dnscrypt_port)
2752 {
2753 #ifdef USE_DNSCRYPT
2754 return ((strchr(ifname, '@') &&
2755 atoi(strchr(ifname, '@')+1) == dnscrypt_port) ||
2756 (!strchr(ifname, '@') && atoi(port) == dnscrypt_port));
2757 #else
2758 (void)ifname;
2759 (void)port;
2760 (void)dnscrypt_port;
2761 return 0;
2762 #endif
2763 }
2764