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/rtt.h"
59 #include "services/cache/infra.h"
60 #include "sldns/wire2str.h"
61 #include "sldns/parseutil.h"
62 #include "iterator/iterator.h"
63 #ifdef HAVE_GLOB_H
64 # include <glob.h>
65 #endif
66 #ifdef CLIENT_SUBNET
67 #include "edns-subnet/edns-subnet.h"
68 #endif
69 #ifdef HAVE_PWD_H
70 #include <pwd.h>
71 #endif
72
73 /** from cfg username, after daemonize setup performed */
74 uid_t cfg_uid = (uid_t)-1;
75 /** from cfg username, after daemonize setup performed */
76 gid_t cfg_gid = (gid_t)-1;
77 /** for debug allow small timeout values for fast rollovers */
78 int autr_permit_small_holddown = 0;
79 /** size (in bytes) of stream wait buffers max */
80 size_t stream_wait_max = 4 * 1024 * 1024;
81 size_t http2_query_buffer_max = 4 * 1024 * 1024;
82 size_t http2_response_buffer_max = 4 * 1024 * 1024;
83
84 /** global config during parsing */
85 struct config_parser_state* cfg_parser = 0;
86
87 /** init ports possible for use */
88 static void init_outgoing_availports(int* array, int num);
89
90 struct config_file*
config_create(void)91 config_create(void)
92 {
93 struct config_file* cfg;
94 cfg = (struct config_file*)calloc(1, sizeof(struct config_file));
95 if(!cfg)
96 return NULL;
97 /* the defaults if no config is present */
98 cfg->verbosity = 1;
99 cfg->stat_interval = 0;
100 cfg->stat_cumulative = 0;
101 cfg->stat_extended = 0;
102 cfg->num_threads = 1;
103 cfg->port = UNBOUND_DNS_PORT;
104 cfg->do_ip4 = 1;
105 cfg->do_ip6 = 1;
106 cfg->do_udp = 1;
107 cfg->do_tcp = 1;
108 cfg->tcp_upstream = 0;
109 cfg->udp_upstream_without_downstream = 0;
110 cfg->tcp_mss = 0;
111 cfg->outgoing_tcp_mss = 0;
112 cfg->tcp_idle_timeout = 30 * 1000; /* 30s in millisecs */
113 cfg->do_tcp_keepalive = 0;
114 cfg->tcp_keepalive_timeout = 120 * 1000; /* 120s in millisecs */
115 cfg->ssl_service_key = NULL;
116 cfg->ssl_service_pem = NULL;
117 cfg->ssl_port = UNBOUND_DNS_OVER_TLS_PORT;
118 cfg->ssl_upstream = 0;
119 cfg->tls_cert_bundle = NULL;
120 cfg->tls_win_cert = 0;
121 cfg->tls_use_sni = 1;
122 cfg->https_port = UNBOUND_DNS_OVER_HTTPS_PORT;
123 if(!(cfg->http_endpoint = strdup("/dns-query"))) goto error_exit;
124 cfg->http_max_streams = 100;
125 cfg->http_query_buffer_size = 4*1024*1024;
126 cfg->http_response_buffer_size = 4*1024*1024;
127 cfg->http_nodelay = 1;
128 cfg->use_syslog = 1;
129 cfg->log_identity = NULL; /* changed later with argv[0] */
130 cfg->log_time_ascii = 0;
131 cfg->log_queries = 0;
132 cfg->log_replies = 0;
133 cfg->log_tag_queryreply = 0;
134 cfg->log_local_actions = 0;
135 cfg->log_servfail = 0;
136 #ifndef USE_WINSOCK
137 # ifdef USE_MINI_EVENT
138 /* select max 1024 sockets */
139 cfg->outgoing_num_ports = 960;
140 cfg->num_queries_per_thread = 512;
141 # else
142 /* libevent can use many sockets */
143 cfg->outgoing_num_ports = 4096;
144 cfg->num_queries_per_thread = 1024;
145 # endif
146 cfg->outgoing_num_tcp = 10;
147 cfg->incoming_num_tcp = 10;
148 #else
149 cfg->outgoing_num_ports = 48; /* windows is limited in num fds */
150 cfg->num_queries_per_thread = 24;
151 cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */
152 cfg->incoming_num_tcp = 2;
153 #endif
154 cfg->stream_wait_size = 4 * 1024 * 1024;
155 cfg->edns_buffer_size = 1232; /* from DNS flagday recommendation */
156 cfg->msg_buffer_size = 65552; /* 64 k + a small margin */
157 cfg->msg_cache_size = 4 * 1024 * 1024;
158 cfg->msg_cache_slabs = 4;
159 cfg->jostle_time = 200;
160 cfg->rrset_cache_size = 4 * 1024 * 1024;
161 cfg->rrset_cache_slabs = 4;
162 cfg->host_ttl = 900;
163 cfg->bogus_ttl = 60;
164 cfg->min_ttl = 0;
165 cfg->max_ttl = 3600 * 24;
166 cfg->max_negative_ttl = 3600;
167 cfg->prefetch = 0;
168 cfg->prefetch_key = 0;
169 cfg->deny_any = 0;
170 cfg->infra_cache_slabs = 4;
171 cfg->infra_cache_numhosts = 10000;
172 cfg->infra_cache_min_rtt = 50;
173 cfg->infra_keep_probing = 0;
174 cfg->delay_close = 0;
175 cfg->udp_connect = 1;
176 if(!(cfg->outgoing_avail_ports = (int*)calloc(65536, sizeof(int))))
177 goto error_exit;
178 init_outgoing_availports(cfg->outgoing_avail_ports, 65536);
179 if(!(cfg->username = strdup(UB_USERNAME))) goto error_exit;
180 #ifdef HAVE_CHROOT
181 if(!(cfg->chrootdir = strdup(CHROOT_DIR))) goto error_exit;
182 #endif
183 if(!(cfg->directory = strdup(RUN_DIR))) goto error_exit;
184 if(!(cfg->logfile = strdup(""))) goto error_exit;
185 if(!(cfg->pidfile = strdup(PIDFILE))) goto error_exit;
186 if(!(cfg->target_fetch_policy = strdup("3 2 1 0 0"))) goto error_exit;
187 cfg->fast_server_permil = 0;
188 cfg->fast_server_num = 3;
189 cfg->donotqueryaddrs = NULL;
190 cfg->donotquery_localhost = 1;
191 cfg->root_hints = NULL;
192 cfg->use_systemd = 0;
193 cfg->do_daemonize = 1;
194 cfg->if_automatic = 0;
195 cfg->so_rcvbuf = 0;
196 cfg->so_sndbuf = 0;
197 cfg->so_reuseport = REUSEPORT_DEFAULT;
198 cfg->ip_transparent = 0;
199 cfg->ip_freebind = 0;
200 cfg->ip_dscp = 0;
201 cfg->num_ifs = 0;
202 cfg->ifs = NULL;
203 cfg->num_out_ifs = 0;
204 cfg->out_ifs = NULL;
205 cfg->stubs = NULL;
206 cfg->forwards = NULL;
207 cfg->auths = NULL;
208 #ifdef CLIENT_SUBNET
209 cfg->client_subnet = NULL;
210 cfg->client_subnet_zone = NULL;
211 cfg->client_subnet_opcode = LDNS_EDNS_CLIENT_SUBNET;
212 cfg->client_subnet_always_forward = 0;
213 cfg->max_client_subnet_ipv4 = 24;
214 cfg->max_client_subnet_ipv6 = 56;
215 cfg->min_client_subnet_ipv4 = 0;
216 cfg->min_client_subnet_ipv6 = 0;
217 cfg->max_ecs_tree_size_ipv4 = 100;
218 cfg->max_ecs_tree_size_ipv6 = 100;
219 #endif
220 cfg->views = NULL;
221 cfg->acls = NULL;
222 cfg->tcp_connection_limits = NULL;
223 cfg->harden_short_bufsize = 1;
224 cfg->harden_large_queries = 0;
225 cfg->harden_glue = 1;
226 cfg->harden_dnssec_stripped = 1;
227 cfg->harden_below_nxdomain = 1;
228 cfg->harden_referral_path = 0;
229 cfg->harden_algo_downgrade = 0;
230 cfg->use_caps_bits_for_id = 0;
231 cfg->caps_whitelist = NULL;
232 cfg->private_address = NULL;
233 cfg->private_domain = NULL;
234 cfg->unwanted_threshold = 0;
235 cfg->hide_identity = 0;
236 cfg->hide_version = 0;
237 cfg->hide_trustanchor = 0;
238 cfg->identity = NULL;
239 cfg->version = NULL;
240 cfg->nsid_cfg_str = NULL;
241 cfg->nsid = NULL;
242 cfg->nsid_len = 0;
243 cfg->auto_trust_anchor_file_list = NULL;
244 cfg->trust_anchor_file_list = NULL;
245 cfg->trust_anchor_list = NULL;
246 cfg->trusted_keys_file_list = NULL;
247 cfg->trust_anchor_signaling = 1;
248 cfg->root_key_sentinel = 1;
249 cfg->domain_insecure = NULL;
250 cfg->val_date_override = 0;
251 cfg->val_sig_skew_min = 3600; /* at least daylight savings trouble */
252 cfg->val_sig_skew_max = 86400; /* at most timezone settings trouble */
253 cfg->val_clean_additional = 1;
254 cfg->val_log_level = 0;
255 cfg->val_log_squelch = 0;
256 cfg->val_permissive_mode = 0;
257 cfg->aggressive_nsec = 0;
258 cfg->ignore_cd = 0;
259 cfg->serve_expired = 0;
260 cfg->serve_expired_ttl = 0;
261 cfg->serve_expired_ttl_reset = 0;
262 cfg->serve_expired_reply_ttl = 30;
263 cfg->serve_expired_client_timeout = 0;
264 cfg->serve_original_ttl = 0;
265 cfg->add_holddown = 30*24*3600;
266 cfg->del_holddown = 30*24*3600;
267 cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */
268 cfg->permit_small_holddown = 0;
269 cfg->key_cache_size = 4 * 1024 * 1024;
270 cfg->key_cache_slabs = 4;
271 cfg->neg_cache_size = 1 * 1024 * 1024;
272 cfg->local_zones = NULL;
273 cfg->local_zones_nodefault = NULL;
274 #ifdef USE_IPSET
275 cfg->local_zones_ipset = NULL;
276 #endif
277 cfg->local_zones_disable_default = 0;
278 cfg->local_data = NULL;
279 cfg->local_zone_overrides = NULL;
280 cfg->unblock_lan_zones = 0;
281 cfg->insecure_lan_zones = 0;
282 cfg->python_script = NULL;
283 cfg->dynlib_file = NULL;
284 cfg->remote_control_enable = 0;
285 cfg->control_ifs.first = NULL;
286 cfg->control_ifs.last = NULL;
287 cfg->control_port = UNBOUND_CONTROL_PORT;
288 cfg->control_use_cert = 1;
289 cfg->minimal_responses = 1;
290 cfg->rrset_roundrobin = 1;
291 cfg->unknown_server_time_limit = 376;
292 cfg->max_udp_size = 4096;
293 if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key")))
294 goto error_exit;
295 if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem")))
296 goto error_exit;
297 if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key")))
298 goto error_exit;
299 if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem")))
300 goto error_exit;
301
302 #ifdef CLIENT_SUBNET
303 if(!(cfg->module_conf = strdup("subnetcache validator iterator"))) goto error_exit;
304 #else
305 if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit;
306 #endif
307 if(!(cfg->val_nsec3_key_iterations =
308 strdup("1024 150 2048 500 4096 2500"))) goto error_exit;
309 #if defined(DNSTAP_SOCKET_PATH)
310 if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH)))
311 goto error_exit;
312 #endif
313 cfg->dnstap_bidirectional = 1;
314 cfg->dnstap_tls = 1;
315 cfg->disable_dnssec_lame_check = 0;
316 cfg->ip_ratelimit = 0;
317 cfg->ratelimit = 0;
318 cfg->ip_ratelimit_slabs = 4;
319 cfg->ratelimit_slabs = 4;
320 cfg->ip_ratelimit_size = 4*1024*1024;
321 cfg->ratelimit_size = 4*1024*1024;
322 cfg->ratelimit_for_domain = NULL;
323 cfg->ratelimit_below_domain = NULL;
324 cfg->ip_ratelimit_factor = 10;
325 cfg->ratelimit_factor = 10;
326 cfg->qname_minimisation = 1;
327 cfg->qname_minimisation_strict = 0;
328 cfg->shm_enable = 0;
329 cfg->shm_key = 11777;
330 cfg->edns_client_strings = NULL;
331 cfg->edns_client_string_opcode = 65001;
332 cfg->dnscrypt = 0;
333 cfg->dnscrypt_port = 0;
334 cfg->dnscrypt_provider = NULL;
335 cfg->dnscrypt_provider_cert = NULL;
336 cfg->dnscrypt_provider_cert_rotated = NULL;
337 cfg->dnscrypt_secret_key = NULL;
338 cfg->dnscrypt_shared_secret_cache_size = 4*1024*1024;
339 cfg->dnscrypt_shared_secret_cache_slabs = 4;
340 cfg->dnscrypt_nonce_cache_size = 4*1024*1024;
341 cfg->dnscrypt_nonce_cache_slabs = 4;
342 cfg->pad_responses = 1;
343 cfg->pad_responses_block_size = 468; /* from RFC8467 */
344 cfg->pad_queries = 1;
345 cfg->pad_queries_block_size = 128; /* from RFC8467 */
346 #ifdef USE_IPSECMOD
347 cfg->ipsecmod_enabled = 1;
348 cfg->ipsecmod_ignore_bogus = 0;
349 cfg->ipsecmod_hook = NULL;
350 cfg->ipsecmod_max_ttl = 3600;
351 cfg->ipsecmod_whitelist = NULL;
352 cfg->ipsecmod_strict = 0;
353 #endif
354 #ifdef USE_CACHEDB
355 if(!(cfg->cachedb_backend = strdup("testframe"))) goto error_exit;
356 if(!(cfg->cachedb_secret = strdup("default"))) goto error_exit;
357 #ifdef USE_REDIS
358 if(!(cfg->redis_server_host = strdup("127.0.0.1"))) goto error_exit;
359 cfg->redis_timeout = 100;
360 cfg->redis_server_port = 6379;
361 cfg->redis_expire_records = 0;
362 #endif /* USE_REDIS */
363 #endif /* USE_CACHEDB */
364 #ifdef USE_IPSET
365 cfg->ipset_name_v4 = NULL;
366 cfg->ipset_name_v6 = NULL;
367 #endif
368 return cfg;
369 error_exit:
370 config_delete(cfg);
371 return NULL;
372 }
373
config_create_forlib(void)374 struct config_file* config_create_forlib(void)
375 {
376 struct config_file* cfg = config_create();
377 if(!cfg) return NULL;
378 /* modifications for library use, less verbose, less memory */
379 free(cfg->chrootdir);
380 cfg->chrootdir = NULL;
381 cfg->verbosity = 0;
382 cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable'
383 and probably within the ulimit(maxfds) of the user */
384 cfg->outgoing_num_tcp = 2;
385 cfg->msg_cache_size = 1024*1024;
386 cfg->msg_cache_slabs = 1;
387 cfg->rrset_cache_size = 1024*1024;
388 cfg->rrset_cache_slabs = 1;
389 cfg->infra_cache_slabs = 1;
390 cfg->use_syslog = 0;
391 cfg->key_cache_size = 1024*1024;
392 cfg->key_cache_slabs = 1;
393 cfg->neg_cache_size = 100 * 1024;
394 cfg->donotquery_localhost = 0; /* allow, so that you can ask a
395 forward nameserver running on localhost */
396 cfg->val_log_level = 2; /* to fill why_bogus with */
397 cfg->val_log_squelch = 1;
398 cfg->minimal_responses = 0;
399 cfg->harden_short_bufsize = 1;
400 return cfg;
401 }
402
403 /** check that the value passed is >= 0 */
404 #define IS_NUMBER_OR_ZERO \
405 if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0
406 /** check that the value passed is > 0 */
407 #define IS_NONZERO_NUMBER \
408 if(atoi(val) == 0) return 0
409 /** check that the value passed is not 0 and a power of 2 */
410 #define IS_POW2_NUMBER \
411 if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0
412 /** check that the value passed is yes or no */
413 #define IS_YES_OR_NO \
414 if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0
415 /** put integer_or_zero into variable */
416 #define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
417 { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); }
418 /** put integer_nonzero into variable */
419 #define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \
420 { IS_NONZERO_NUMBER; cfg->var = atoi(val); }
421 /** put integer_or_zero into unsigned */
422 #define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
423 { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); }
424 /** put integer_or_zero into size_t */
425 #define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
426 { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); }
427 /** put integer_nonzero into size_t */
428 #define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \
429 { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); }
430 /** put yesno into variable */
431 #define S_YNO(str, var) if(strcmp(opt, str) == 0) \
432 { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); }
433 /** put memsize into variable */
434 #define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \
435 { return cfg_parse_memsize(val, &cfg->var); }
436 /** put pow2 number into variable */
437 #define S_POW2(str, var) if(strcmp(opt, str)==0) \
438 { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); }
439 /** put string into variable */
440 #define S_STR(str, var) if(strcmp(opt, str)==0) \
441 { free(cfg->var); return (cfg->var = strdup(val)) != NULL; }
442 /** put string into strlist */
443 #define S_STRLIST(str, var) if(strcmp(opt, str)==0) \
444 { return cfg_strlist_insert(&cfg->var, strdup(val)); }
445 /** put string into strlist if not present yet*/
446 #define S_STRLIST_UNIQ(str, var) if(strcmp(opt, str)==0) \
447 { if(cfg_strlist_find(cfg->var, val)) { return 0;} \
448 return cfg_strlist_insert(&cfg->var, strdup(val)); }
449 /** append string to strlist */
450 #define S_STRLIST_APPEND(str, var) if(strcmp(opt, str)==0) \
451 { return cfg_strlist_append(&cfg->var, strdup(val)); }
452
config_set_option(struct config_file * cfg,const char * opt,const char * val)453 int config_set_option(struct config_file* cfg, const char* opt,
454 const char* val)
455 {
456 char buf[64];
457 if(!opt) return 0;
458 if(opt[strlen(opt)-1] != ':' && strlen(opt)+2<sizeof(buf)) {
459 snprintf(buf, sizeof(buf), "%s:", opt);
460 opt = buf;
461 }
462 S_NUMBER_OR_ZERO("verbosity:", verbosity)
463 else if(strcmp(opt, "statistics-interval:") == 0) {
464 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0)
465 cfg->stat_interval = 0;
466 else if(atoi(val) == 0)
467 return 0;
468 else cfg->stat_interval = atoi(val);
469 } else if(strcmp(opt, "num_threads:") == 0) {
470 /* not supported, library must have 1 thread in bgworker */
471 return 0;
472 } else if(strcmp(opt, "outgoing-port-permit:") == 0) {
473 return cfg_mark_ports(val, 1,
474 cfg->outgoing_avail_ports, 65536);
475 } else if(strcmp(opt, "outgoing-port-avoid:") == 0) {
476 return cfg_mark_ports(val, 0,
477 cfg->outgoing_avail_ports, 65536);
478 } else if(strcmp(opt, "local-zone:") == 0) {
479 return cfg_parse_local_zone(cfg, val);
480 } else if(strcmp(opt, "val-override-date:") == 0) {
481 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) {
482 cfg->val_date_override = 0;
483 } else if(strlen(val) == 14) {
484 cfg->val_date_override = cfg_convert_timeval(val);
485 return cfg->val_date_override != 0;
486 } else {
487 if(atoi(val) == 0) return 0;
488 cfg->val_date_override = (uint32_t)atoi(val);
489 }
490 } else if(strcmp(opt, "local-data-ptr:") == 0) {
491 char* ptr = cfg_ptr_reverse((char*)opt);
492 return cfg_strlist_insert(&cfg->local_data, ptr);
493 } else if(strcmp(opt, "logfile:") == 0) {
494 cfg->use_syslog = 0;
495 free(cfg->logfile);
496 return (cfg->logfile = strdup(val)) != NULL;
497 }
498 else if(strcmp(opt, "log-time-ascii:") == 0)
499 { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0);
500 log_set_time_asc(cfg->log_time_ascii); }
501 else S_SIZET_NONZERO("max-udp-size:", max_udp_size)
502 else S_YNO("use-syslog:", use_syslog)
503 else S_STR("log-identity:", log_identity)
504 else S_YNO("extended-statistics:", stat_extended)
505 else S_YNO("statistics-cumulative:", stat_cumulative)
506 else S_YNO("shm-enable:", shm_enable)
507 else S_NUMBER_OR_ZERO("shm-key:", shm_key)
508 else S_YNO("do-ip4:", do_ip4)
509 else S_YNO("do-ip6:", do_ip6)
510 else S_YNO("do-udp:", do_udp)
511 else S_YNO("do-tcp:", do_tcp)
512 else S_YNO("prefer-ip4:", prefer_ip4)
513 else S_YNO("prefer-ip6:", prefer_ip6)
514 else S_YNO("tcp-upstream:", tcp_upstream)
515 else S_YNO("udp-upstream-without-downstream:",
516 udp_upstream_without_downstream)
517 else S_NUMBER_NONZERO("tcp-mss:", tcp_mss)
518 else S_NUMBER_NONZERO("outgoing-tcp-mss:", outgoing_tcp_mss)
519 else S_NUMBER_NONZERO("tcp-idle-timeout:", tcp_idle_timeout)
520 else S_YNO("edns-tcp-keepalive:", do_tcp_keepalive)
521 else S_NUMBER_NONZERO("edns-tcp-keepalive-timeout:", tcp_keepalive_timeout)
522 else S_YNO("ssl-upstream:", ssl_upstream)
523 else S_STR("ssl-service-key:", ssl_service_key)
524 else S_STR("ssl-service-pem:", ssl_service_pem)
525 else S_NUMBER_NONZERO("ssl-port:", ssl_port)
526 else S_STR("tls-cert-bundle:", tls_cert_bundle)
527 else S_YNO("tls-win-cert:", tls_win_cert)
528 else S_STRLIST("additional-tls-port:", tls_additional_port)
529 else S_STRLIST("tls-additional-ports:", tls_additional_port)
530 else S_STRLIST("tls-additional-port:", tls_additional_port)
531 else S_STRLIST_APPEND("tls-session-ticket-keys:", tls_session_ticket_keys)
532 else S_STR("tls-ciphers:", tls_ciphers)
533 else S_STR("tls-ciphersuites:", tls_ciphersuites)
534 else S_YNO("tls-use-sni:", tls_use_sni)
535 else S_NUMBER_NONZERO("https-port:", https_port)
536 else S_STR("http-endpoint:", http_endpoint)
537 else S_NUMBER_NONZERO("http-max-streams:", http_max_streams)
538 else S_MEMSIZE("http-query-buffer-size:", http_query_buffer_size)
539 else S_MEMSIZE("http-response-buffer-size:", http_response_buffer_size)
540 else S_YNO("http-nodelay:", http_nodelay)
541 else S_YNO("http-notls-downstream:", http_notls_downstream)
542 else S_YNO("interface-automatic:", if_automatic)
543 else S_YNO("use-systemd:", use_systemd)
544 else S_YNO("do-daemonize:", do_daemonize)
545 else S_NUMBER_NONZERO("port:", port)
546 else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports)
547 else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp)
548 else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp)
549 else S_MEMSIZE("stream-wait-size:", stream_wait_size)
550 else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size)
551 else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size)
552 else S_MEMSIZE("msg-cache-size:", msg_cache_size)
553 else S_POW2("msg-cache-slabs:", msg_cache_slabs)
554 else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread)
555 else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time)
556 else S_MEMSIZE("so-rcvbuf:", so_rcvbuf)
557 else S_MEMSIZE("so-sndbuf:", so_sndbuf)
558 else S_YNO("so-reuseport:", so_reuseport)
559 else S_YNO("ip-transparent:", ip_transparent)
560 else S_YNO("ip-freebind:", ip_freebind)
561 else S_NUMBER_OR_ZERO("ip-dscp:", ip_dscp)
562 else S_MEMSIZE("rrset-cache-size:", rrset_cache_size)
563 else S_POW2("rrset-cache-slabs:", rrset_cache_slabs)
564 else S_YNO("prefetch:", prefetch)
565 else S_YNO("prefetch-key:", prefetch_key)
566 else S_YNO("deny-any:", deny_any)
567 else if(strcmp(opt, "cache-max-ttl:") == 0)
568 { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;}
569 else if(strcmp(opt, "cache-max-negative-ttl:") == 0)
570 { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;}
571 else if(strcmp(opt, "cache-min-ttl:") == 0)
572 { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;}
573 else if(strcmp(opt, "infra-cache-min-rtt:") == 0) {
574 IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val);
575 RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt;
576 }
577 else S_YNO("infra-keep-probing:", infra_keep_probing)
578 else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl)
579 else S_POW2("infra-cache-slabs:", infra_cache_slabs)
580 else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts)
581 else S_NUMBER_OR_ZERO("delay-close:", delay_close)
582 else S_YNO("udp-connect:", udp_connect)
583 else S_STR("chroot:", chrootdir)
584 else S_STR("username:", username)
585 else S_STR("directory:", directory)
586 else S_STR("pidfile:", pidfile)
587 else S_YNO("hide-identity:", hide_identity)
588 else S_YNO("hide-version:", hide_version)
589 else S_YNO("hide-trustanchor:", hide_trustanchor)
590 else S_STR("identity:", identity)
591 else S_STR("version:", version)
592 else if(strcmp(opt, "nsid:") == 0) {
593 free(cfg->nsid_cfg_str);
594 if (!(cfg->nsid_cfg_str = strdup(val)))
595 return 0;
596 /* Empty string is just validly unsetting nsid */
597 if (*val == 0) {
598 free(cfg->nsid);
599 cfg->nsid = NULL;
600 cfg->nsid_len = 0;
601 return 1;
602 }
603 cfg->nsid = cfg_parse_nsid(val, &cfg->nsid_len);
604 return cfg->nsid != NULL;
605 }
606 else S_STRLIST("root-hints:", root_hints)
607 else S_STR("target-fetch-policy:", target_fetch_policy)
608 else S_YNO("harden-glue:", harden_glue)
609 else S_YNO("harden-short-bufsize:", harden_short_bufsize)
610 else S_YNO("harden-large-queries:", harden_large_queries)
611 else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped)
612 else S_YNO("harden-below-nxdomain:", harden_below_nxdomain)
613 else S_YNO("harden-referral-path:", harden_referral_path)
614 else S_YNO("harden-algo-downgrade:", harden_algo_downgrade)
615 else S_YNO("use-caps-for-id:", use_caps_bits_for_id)
616 else S_STRLIST("caps-whitelist:", caps_whitelist)
617 else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold)
618 else S_STRLIST("private-address:", private_address)
619 else S_STRLIST("private-domain:", private_domain)
620 else S_YNO("do-not-query-localhost:", donotquery_localhost)
621 else S_STRLIST("do-not-query-address:", donotqueryaddrs)
622 else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list)
623 else S_STRLIST("trust-anchor-file:", trust_anchor_file_list)
624 else S_STRLIST("trust-anchor:", trust_anchor_list)
625 else S_STRLIST("trusted-keys-file:", trusted_keys_file_list)
626 else S_YNO("trust-anchor-signaling:", trust_anchor_signaling)
627 else S_YNO("root-key-sentinel:", root_key_sentinel)
628 else S_STRLIST("domain-insecure:", domain_insecure)
629 else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl)
630 else S_YNO("val-clean-additional:", val_clean_additional)
631 else S_NUMBER_OR_ZERO("val-log-level:", val_log_level)
632 else S_YNO("val-log-squelch:", val_log_squelch)
633 else S_YNO("log-queries:", log_queries)
634 else S_YNO("log-replies:", log_replies)
635 else S_YNO("log-tag-queryreply:", log_tag_queryreply)
636 else S_YNO("log-local-actions:", log_local_actions)
637 else S_YNO("log-servfail:", log_servfail)
638 else S_YNO("val-permissive-mode:", val_permissive_mode)
639 else S_YNO("aggressive-nsec:", aggressive_nsec)
640 else S_YNO("ignore-cd-flag:", ignore_cd)
641 else if(strcmp(opt, "serve-expired:") == 0)
642 { IS_YES_OR_NO; cfg->serve_expired = (strcmp(val, "yes") == 0);
643 SERVE_EXPIRED = cfg->serve_expired; }
644 else if(strcmp(opt, "serve-expired-ttl:") == 0)
645 { IS_NUMBER_OR_ZERO; cfg->serve_expired_ttl = atoi(val); SERVE_EXPIRED_TTL=(time_t)cfg->serve_expired_ttl;}
646 else S_YNO("serve-expired-ttl-reset:", serve_expired_ttl_reset)
647 else if(strcmp(opt, "serve-expired-reply-ttl:") == 0)
648 { IS_NUMBER_OR_ZERO; cfg->serve_expired_reply_ttl = atoi(val); SERVE_EXPIRED_REPLY_TTL=(time_t)cfg->serve_expired_reply_ttl;}
649 else S_NUMBER_OR_ZERO("serve-expired-client-timeout:", serve_expired_client_timeout)
650 else S_YNO("serve-original-ttl:", serve_original_ttl)
651 else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations)
652 else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown)
653 else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown)
654 else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing)
655 else if(strcmp(opt, "permit-small-holddown:") == 0)
656 { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0);
657 autr_permit_small_holddown = cfg->permit_small_holddown; }
658 else S_MEMSIZE("key-cache-size:", key_cache_size)
659 else S_POW2("key-cache-slabs:", key_cache_slabs)
660 else S_MEMSIZE("neg-cache-size:", neg_cache_size)
661 else S_YNO("minimal-responses:", minimal_responses)
662 else S_YNO("rrset-roundrobin:", rrset_roundrobin)
663 else S_NUMBER_OR_ZERO("unknown-server-time-limit:", unknown_server_time_limit)
664 else S_STRLIST("local-data:", local_data)
665 else S_YNO("unblock-lan-zones:", unblock_lan_zones)
666 else S_YNO("insecure-lan-zones:", insecure_lan_zones)
667 else S_YNO("control-enable:", remote_control_enable)
668 else S_STRLIST_APPEND("control-interface:", control_ifs)
669 else S_NUMBER_NONZERO("control-port:", control_port)
670 else S_STR("server-key-file:", server_key_file)
671 else S_STR("server-cert-file:", server_cert_file)
672 else S_STR("control-key-file:", control_key_file)
673 else S_STR("control-cert-file:", control_cert_file)
674 else S_STR("module-config:", module_conf)
675 else S_STRLIST("python-script:", python_script)
676 else S_STRLIST("dynlib-file:", dynlib_file)
677 else S_YNO("disable-dnssec-lame-check:", disable_dnssec_lame_check)
678 #ifdef CLIENT_SUBNET
679 /* Can't set max subnet prefix here, since that value is used when
680 * generating the address tree. */
681 /* No client-subnet-always-forward here, module registration depends on
682 * this option. */
683 #endif
684 #ifdef USE_DNSTAP
685 else S_YNO("dnstap-enable:", dnstap)
686 else S_YNO("dnstap-bidirectional:", dnstap_bidirectional)
687 else S_STR("dnstap-socket-path:", dnstap_socket_path)
688 else S_STR("dnstap-ip:", dnstap_ip)
689 else S_YNO("dnstap-tls:", dnstap_tls)
690 else S_STR("dnstap-tls-server-name:", dnstap_tls_server_name)
691 else S_STR("dnstap-tls-cert-bundle:", dnstap_tls_cert_bundle)
692 else S_STR("dnstap-tls-client-key-file:", dnstap_tls_client_key_file)
693 else S_STR("dnstap-tls-client-cert-file:",
694 dnstap_tls_client_cert_file)
695 else S_YNO("dnstap-send-identity:", dnstap_send_identity)
696 else S_YNO("dnstap-send-version:", dnstap_send_version)
697 else S_STR("dnstap-identity:", dnstap_identity)
698 else S_STR("dnstap-version:", dnstap_version)
699 else S_YNO("dnstap-log-resolver-query-messages:",
700 dnstap_log_resolver_query_messages)
701 else S_YNO("dnstap-log-resolver-response-messages:",
702 dnstap_log_resolver_response_messages)
703 else S_YNO("dnstap-log-client-query-messages:",
704 dnstap_log_client_query_messages)
705 else S_YNO("dnstap-log-client-response-messages:",
706 dnstap_log_client_response_messages)
707 else S_YNO("dnstap-log-forwarder-query-messages:",
708 dnstap_log_forwarder_query_messages)
709 else S_YNO("dnstap-log-forwarder-response-messages:",
710 dnstap_log_forwarder_response_messages)
711 #endif
712 #ifdef USE_DNSCRYPT
713 else S_YNO("dnscrypt-enable:", dnscrypt)
714 else S_NUMBER_NONZERO("dnscrypt-port:", dnscrypt_port)
715 else S_STR("dnscrypt-provider:", dnscrypt_provider)
716 else S_STRLIST_UNIQ("dnscrypt-provider-cert:", dnscrypt_provider_cert)
717 else S_STRLIST("dnscrypt-provider-cert-rotated:", dnscrypt_provider_cert_rotated)
718 else S_STRLIST_UNIQ("dnscrypt-secret-key:", dnscrypt_secret_key)
719 else S_MEMSIZE("dnscrypt-shared-secret-cache-size:",
720 dnscrypt_shared_secret_cache_size)
721 else S_POW2("dnscrypt-shared-secret-cache-slabs:",
722 dnscrypt_shared_secret_cache_slabs)
723 else S_MEMSIZE("dnscrypt-nonce-cache-size:",
724 dnscrypt_nonce_cache_size)
725 else S_POW2("dnscrypt-nonce-cache-slabs:",
726 dnscrypt_nonce_cache_slabs)
727 #endif
728 else if(strcmp(opt, "ip-ratelimit:") == 0) {
729 IS_NUMBER_OR_ZERO; cfg->ip_ratelimit = atoi(val);
730 infra_ip_ratelimit=cfg->ip_ratelimit;
731 }
732 else if(strcmp(opt, "ratelimit:") == 0) {
733 IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val);
734 infra_dp_ratelimit=cfg->ratelimit;
735 }
736 else S_MEMSIZE("ip-ratelimit-size:", ip_ratelimit_size)
737 else S_MEMSIZE("ratelimit-size:", ratelimit_size)
738 else S_POW2("ip-ratelimit-slabs:", ip_ratelimit_slabs)
739 else S_POW2("ratelimit-slabs:", ratelimit_slabs)
740 else S_NUMBER_OR_ZERO("ip-ratelimit-factor:", ip_ratelimit_factor)
741 else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor)
742 else S_SIZET_NONZERO("fast-server-num:", fast_server_num)
743 else S_NUMBER_OR_ZERO("fast-server-permil:", fast_server_permil)
744 else S_YNO("qname-minimisation:", qname_minimisation)
745 else S_YNO("qname-minimisation-strict:", qname_minimisation_strict)
746 else S_YNO("pad-responses:", pad_responses)
747 else S_SIZET_NONZERO("pad-responses-block-size:", pad_responses_block_size)
748 else S_YNO("pad-queries:", pad_queries)
749 else S_SIZET_NONZERO("pad-queries-block-size:", pad_queries_block_size)
750 #ifdef USE_IPSECMOD
751 else S_YNO("ipsecmod-enabled:", ipsecmod_enabled)
752 else S_YNO("ipsecmod-ignore-bogus:", ipsecmod_ignore_bogus)
753 else if(strcmp(opt, "ipsecmod-max-ttl:") == 0)
754 { IS_NUMBER_OR_ZERO; cfg->ipsecmod_max_ttl = atoi(val); }
755 else S_YNO("ipsecmod-strict:", ipsecmod_strict)
756 #endif
757 else if(strcmp(opt, "define-tag:") ==0) {
758 return config_add_tag(cfg, val);
759 /* val_sig_skew_min and max are copied into val_env during init,
760 * so this does not update val_env with set_option */
761 } else if(strcmp(opt, "val-sig-skew-min:") == 0)
762 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); }
763 else if(strcmp(opt, "val-sig-skew-max:") == 0)
764 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); }
765 else if (strcmp(opt, "outgoing-interface:") == 0) {
766 char* d = strdup(val);
767 char** oi =
768 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*));
769 if(!d || !oi) { free(d); free(oi); return -1; }
770 if(cfg->out_ifs && cfg->num_out_ifs) {
771 memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*));
772 free(cfg->out_ifs);
773 }
774 oi[cfg->num_out_ifs++] = d;
775 cfg->out_ifs = oi;
776 } else {
777 /* unknown or unsupported (from the set_option interface):
778 * interface, outgoing-interface, access-control,
779 * stub-zone, name, stub-addr, stub-host, stub-prime
780 * forward-first, stub-first, forward-ssl-upstream,
781 * stub-ssl-upstream, forward-zone, auth-zone
782 * name, forward-addr, forward-host,
783 * ratelimit-for-domain, ratelimit-below-domain,
784 * local-zone-tag, access-control-view,
785 * send-client-subnet, client-subnet-always-forward,
786 * max-client-subnet-ipv4, max-client-subnet-ipv6,
787 * min-client-subnet-ipv4, min-client-subnet-ipv6,
788 * max-ecs-tree-size-ipv4, max-ecs-tree-size-ipv6, ipsecmod_hook,
789 * ipsecmod_whitelist. */
790 return 0;
791 }
792 return 1;
793 }
794
config_print_func(char * line,void * arg)795 void config_print_func(char* line, void* arg)
796 {
797 FILE* f = (FILE*)arg;
798 (void)fprintf(f, "%s\n", line);
799 }
800
801 /** collate func arg */
802 struct config_collate_arg {
803 /** list of result items */
804 struct config_strlist_head list;
805 /** if a malloc error occurred, 0 is OK */
806 int status;
807 };
808
config_collate_func(char * line,void * arg)809 void config_collate_func(char* line, void* arg)
810 {
811 struct config_collate_arg* m = (struct config_collate_arg*)arg;
812 if(m->status)
813 return;
814 if(!cfg_strlist_append(&m->list, strdup(line)))
815 m->status = 1;
816 }
817
config_get_option_list(struct config_file * cfg,const char * opt,struct config_strlist ** list)818 int config_get_option_list(struct config_file* cfg, const char* opt,
819 struct config_strlist** list)
820 {
821 struct config_collate_arg m;
822 memset(&m, 0, sizeof(m));
823 *list = NULL;
824 if(!config_get_option(cfg, opt, config_collate_func, &m))
825 return 1;
826 if(m.status) {
827 config_delstrlist(m.list.first);
828 return 2;
829 }
830 *list = m.list.first;
831 return 0;
832 }
833
834 int
config_get_option_collate(struct config_file * cfg,const char * opt,char ** str)835 config_get_option_collate(struct config_file* cfg, const char* opt, char** str)
836 {
837 struct config_strlist* list = NULL;
838 int r;
839 *str = NULL;
840 if((r = config_get_option_list(cfg, opt, &list)) != 0)
841 return r;
842 *str = config_collate_cat(list);
843 config_delstrlist(list);
844 if(!*str) return 2;
845 return 0;
846 }
847
848 char*
config_collate_cat(struct config_strlist * list)849 config_collate_cat(struct config_strlist* list)
850 {
851 size_t total = 0, left;
852 struct config_strlist* s;
853 char *r, *w;
854 if(!list) /* no elements */
855 return strdup("");
856 if(list->next == NULL) /* one element , no newline at end. */
857 return strdup(list->str);
858 /* count total length */
859 for(s=list; s; s=s->next)
860 total += strlen(s->str) + 1; /* len + newline */
861 left = total+1; /* one extra for nul at end */
862 r = malloc(left);
863 if(!r)
864 return NULL;
865 w = r;
866 for(s=list; s; s=s->next) {
867 size_t this = strlen(s->str);
868 if(this+2 > left) { /* sanity check */
869 free(r);
870 return NULL;
871 }
872 snprintf(w, left, "%s\n", s->str);
873 this = strlen(w);
874 w += this;
875 left -= this;
876 }
877 return r;
878 }
879
880 /** compare and print decimal option */
881 #define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \
882 {snprintf(buf, len, "%d", (int)cfg->var); \
883 func(buf, arg);}
884 /** compare and print unsigned option */
885 #define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \
886 {snprintf(buf, len, "%u", (unsigned)cfg->var); \
887 func(buf, arg);}
888 /** compare and print yesno option */
889 #define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \
890 {func(cfg->var?"yes":"no", arg);}
891 /** compare and print string option */
892 #define O_STR(opt, str, var) if(strcmp(opt, str)==0) \
893 {func(cfg->var?cfg->var:"", arg);}
894 /** compare and print array option */
895 #define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \
896 {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);}
897 /** compare and print memorysize option */
898 #define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \
899 if(cfg->var > 1024*1024*1024) { \
900 size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \
901 snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \
902 } else snprintf(buf, len, "%u", (unsigned)cfg->var); \
903 func(buf, arg);}
904 /** compare and print list option */
905 #define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \
906 struct config_strlist* p = cfg->lst; \
907 for(p = cfg->lst; p; p = p->next) \
908 func(p->str, arg); \
909 }
910 /** compare and print list option */
911 #define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \
912 struct config_str2list* p = cfg->lst; \
913 for(p = cfg->lst; p; p = p->next) { \
914 snprintf(buf, len, "%s %s", p->str, p->str2); \
915 func(buf, arg); \
916 } \
917 }
918 /** compare and print list option */
919 #define O_LS3(opt, name, lst) if(strcmp(opt, name)==0) { \
920 struct config_str3list* p = cfg->lst; \
921 for(p = cfg->lst; p; p = p->next) { \
922 snprintf(buf, len, "%s %s %s", p->str, p->str2, p->str3); \
923 func(buf, arg); \
924 } \
925 }
926 /** compare and print taglist option */
927 #define O_LTG(opt, name, lst) if(strcmp(opt, name)==0) { \
928 char* tmpstr = NULL; \
929 struct config_strbytelist *p = cfg->lst; \
930 for(p = cfg->lst; p; p = p->next) {\
931 tmpstr = config_taglist2str(cfg, p->str2, p->str2len); \
932 if(tmpstr) {\
933 snprintf(buf, len, "%s %s", p->str, tmpstr); \
934 func(buf, arg); \
935 free(tmpstr); \
936 } \
937 } \
938 }
939
940 int
config_get_option(struct config_file * cfg,const char * opt,void (* func)(char *,void *),void * arg)941 config_get_option(struct config_file* cfg, const char* opt,
942 void (*func)(char*,void*), void* arg)
943 {
944 char buf[1024], nopt[64];
945 size_t len = sizeof(buf);
946 if(!opt) return 0;
947 if(opt && opt[strlen(opt)-1] == ':' && strlen(opt)<sizeof(nopt)) {
948 memmove(nopt, opt, strlen(opt));
949 nopt[strlen(opt)-1] = 0;
950 opt = nopt;
951 }
952 fptr_ok(fptr_whitelist_print_func(func));
953 O_DEC(opt, "verbosity", verbosity)
954 else O_DEC(opt, "statistics-interval", stat_interval)
955 else O_YNO(opt, "statistics-cumulative", stat_cumulative)
956 else O_YNO(opt, "extended-statistics", stat_extended)
957 else O_YNO(opt, "shm-enable", shm_enable)
958 else O_DEC(opt, "shm-key", shm_key)
959 else O_YNO(opt, "use-syslog", use_syslog)
960 else O_STR(opt, "log-identity", log_identity)
961 else O_YNO(opt, "log-time-ascii", log_time_ascii)
962 else O_DEC(opt, "num-threads", num_threads)
963 else O_IFC(opt, "interface", num_ifs, ifs)
964 else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs)
965 else O_YNO(opt, "interface-automatic", if_automatic)
966 else O_DEC(opt, "port", port)
967 else O_DEC(opt, "outgoing-range", outgoing_num_ports)
968 else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp)
969 else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp)
970 else O_MEM(opt, "stream-wait-size", stream_wait_size)
971 else O_DEC(opt, "edns-buffer-size", edns_buffer_size)
972 else O_DEC(opt, "msg-buffer-size", msg_buffer_size)
973 else O_MEM(opt, "msg-cache-size", msg_cache_size)
974 else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs)
975 else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread)
976 else O_UNS(opt, "jostle-timeout", jostle_time)
977 else O_MEM(opt, "so-rcvbuf", so_rcvbuf)
978 else O_MEM(opt, "so-sndbuf", so_sndbuf)
979 else O_YNO(opt, "so-reuseport", so_reuseport)
980 else O_YNO(opt, "ip-transparent", ip_transparent)
981 else O_YNO(opt, "ip-freebind", ip_freebind)
982 else O_DEC(opt, "ip-dscp", ip_dscp)
983 else O_MEM(opt, "rrset-cache-size", rrset_cache_size)
984 else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs)
985 else O_YNO(opt, "prefetch-key", prefetch_key)
986 else O_YNO(opt, "prefetch", prefetch)
987 else O_YNO(opt, "deny-any", deny_any)
988 else O_DEC(opt, "cache-max-ttl", max_ttl)
989 else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl)
990 else O_DEC(opt, "cache-min-ttl", min_ttl)
991 else O_DEC(opt, "infra-host-ttl", host_ttl)
992 else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs)
993 else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt)
994 else O_YNO(opt, "infra-keep-probing", infra_keep_probing)
995 else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts)
996 else O_UNS(opt, "delay-close", delay_close)
997 else O_YNO(opt, "udp-connect", udp_connect)
998 else O_YNO(opt, "do-ip4", do_ip4)
999 else O_YNO(opt, "do-ip6", do_ip6)
1000 else O_YNO(opt, "do-udp", do_udp)
1001 else O_YNO(opt, "do-tcp", do_tcp)
1002 else O_YNO(opt, "prefer-ip4", prefer_ip4)
1003 else O_YNO(opt, "prefer-ip6", prefer_ip6)
1004 else O_YNO(opt, "tcp-upstream", tcp_upstream)
1005 else O_YNO(opt, "udp-upstream-without-downstream", udp_upstream_without_downstream)
1006 else O_DEC(opt, "tcp-mss", tcp_mss)
1007 else O_DEC(opt, "outgoing-tcp-mss", outgoing_tcp_mss)
1008 else O_DEC(opt, "tcp-idle-timeout", tcp_idle_timeout)
1009 else O_YNO(opt, "edns-tcp-keepalive", do_tcp_keepalive)
1010 else O_DEC(opt, "edns-tcp-keepalive-timeout", tcp_keepalive_timeout)
1011 else O_YNO(opt, "ssl-upstream", ssl_upstream)
1012 else O_STR(opt, "ssl-service-key", ssl_service_key)
1013 else O_STR(opt, "ssl-service-pem", ssl_service_pem)
1014 else O_DEC(opt, "ssl-port", ssl_port)
1015 else O_STR(opt, "tls-cert-bundle", tls_cert_bundle)
1016 else O_YNO(opt, "tls-win-cert", tls_win_cert)
1017 else O_LST(opt, "tls-additional-port", tls_additional_port)
1018 else O_LST(opt, "tls-session-ticket-keys", tls_session_ticket_keys.first)
1019 else O_STR(opt, "tls-ciphers", tls_ciphers)
1020 else O_STR(opt, "tls-ciphersuites", tls_ciphersuites)
1021 else O_YNO(opt, "tls-use-sni", tls_use_sni)
1022 else O_DEC(opt, "https-port", https_port)
1023 else O_STR(opt, "http-endpoint", http_endpoint)
1024 else O_UNS(opt, "http-max-streams", http_max_streams)
1025 else O_MEM(opt, "http-query-buffer-size", http_query_buffer_size)
1026 else O_MEM(opt, "http-response-buffer-size", http_response_buffer_size)
1027 else O_YNO(opt, "http-nodelay", http_nodelay)
1028 else O_YNO(opt, "http-notls-downstream", http_notls_downstream)
1029 else O_YNO(opt, "use-systemd", use_systemd)
1030 else O_YNO(opt, "do-daemonize", do_daemonize)
1031 else O_STR(opt, "chroot", chrootdir)
1032 else O_STR(opt, "username", username)
1033 else O_STR(opt, "directory", directory)
1034 else O_STR(opt, "logfile", logfile)
1035 else O_YNO(opt, "log-queries", log_queries)
1036 else O_YNO(opt, "log-replies", log_replies)
1037 else O_YNO(opt, "log-tag-queryreply", log_tag_queryreply)
1038 else O_YNO(opt, "log-local-actions", log_local_actions)
1039 else O_YNO(opt, "log-servfail", log_servfail)
1040 else O_STR(opt, "pidfile", pidfile)
1041 else O_YNO(opt, "hide-identity", hide_identity)
1042 else O_YNO(opt, "hide-version", hide_version)
1043 else O_YNO(opt, "hide-trustanchor", hide_trustanchor)
1044 else O_STR(opt, "identity", identity)
1045 else O_STR(opt, "version", version)
1046 else O_STR(opt, "nsid", nsid_cfg_str)
1047 else O_STR(opt, "target-fetch-policy", target_fetch_policy)
1048 else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize)
1049 else O_YNO(opt, "harden-large-queries", harden_large_queries)
1050 else O_YNO(opt, "harden-glue", harden_glue)
1051 else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped)
1052 else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain)
1053 else O_YNO(opt, "harden-referral-path", harden_referral_path)
1054 else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade)
1055 else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id)
1056 else O_LST(opt, "caps-whitelist", caps_whitelist)
1057 else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold)
1058 else O_YNO(opt, "do-not-query-localhost", donotquery_localhost)
1059 else O_STR(opt, "module-config", module_conf)
1060 else O_DEC(opt, "val-bogus-ttl", bogus_ttl)
1061 else O_YNO(opt, "val-clean-additional", val_clean_additional)
1062 else O_DEC(opt, "val-log-level", val_log_level)
1063 else O_YNO(opt, "val-permissive-mode", val_permissive_mode)
1064 else O_YNO(opt, "aggressive-nsec", aggressive_nsec)
1065 else O_YNO(opt, "ignore-cd-flag", ignore_cd)
1066 else O_YNO(opt, "serve-expired", serve_expired)
1067 else O_DEC(opt, "serve-expired-ttl", serve_expired_ttl)
1068 else O_YNO(opt, "serve-expired-ttl-reset", serve_expired_ttl_reset)
1069 else O_DEC(opt, "serve-expired-reply-ttl", serve_expired_reply_ttl)
1070 else O_DEC(opt, "serve-expired-client-timeout", serve_expired_client_timeout)
1071 else O_YNO(opt, "serve-original-ttl", serve_original_ttl)
1072 else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations)
1073 else O_UNS(opt, "add-holddown", add_holddown)
1074 else O_UNS(opt, "del-holddown", del_holddown)
1075 else O_UNS(opt, "keep-missing", keep_missing)
1076 else O_YNO(opt, "permit-small-holddown", permit_small_holddown)
1077 else O_MEM(opt, "key-cache-size", key_cache_size)
1078 else O_DEC(opt, "key-cache-slabs", key_cache_slabs)
1079 else O_MEM(opt, "neg-cache-size", neg_cache_size)
1080 else O_YNO(opt, "control-enable", remote_control_enable)
1081 else O_DEC(opt, "control-port", control_port)
1082 else O_STR(opt, "server-key-file", server_key_file)
1083 else O_STR(opt, "server-cert-file", server_cert_file)
1084 else O_STR(opt, "control-key-file", control_key_file)
1085 else O_STR(opt, "control-cert-file", control_cert_file)
1086 else O_LST(opt, "root-hints", root_hints)
1087 else O_LS2(opt, "access-control", acls)
1088 else O_LS2(opt, "tcp-connection-limit", tcp_connection_limits)
1089 else O_LST(opt, "do-not-query-address", donotqueryaddrs)
1090 else O_LST(opt, "private-address", private_address)
1091 else O_LST(opt, "private-domain", private_domain)
1092 else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list)
1093 else O_LST(opt, "trust-anchor-file", trust_anchor_file_list)
1094 else O_LST(opt, "trust-anchor", trust_anchor_list)
1095 else O_LST(opt, "trusted-keys-file", trusted_keys_file_list)
1096 else O_YNO(opt, "trust-anchor-signaling", trust_anchor_signaling)
1097 else O_YNO(opt, "root-key-sentinel", root_key_sentinel)
1098 else O_LST(opt, "control-interface", control_ifs.first)
1099 else O_LST(opt, "domain-insecure", domain_insecure)
1100 else O_UNS(opt, "val-override-date", val_date_override)
1101 else O_YNO(opt, "minimal-responses", minimal_responses)
1102 else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin)
1103 else O_DEC(opt, "unknown-server-time-limit", unknown_server_time_limit)
1104 #ifdef CLIENT_SUBNET
1105 else O_LST(opt, "send-client-subnet", client_subnet)
1106 else O_LST(opt, "client-subnet-zone", client_subnet_zone)
1107 else O_DEC(opt, "max-client-subnet-ipv4", max_client_subnet_ipv4)
1108 else O_DEC(opt, "max-client-subnet-ipv6", max_client_subnet_ipv6)
1109 else O_DEC(opt, "min-client-subnet-ipv4", min_client_subnet_ipv4)
1110 else O_DEC(opt, "min-client-subnet-ipv6", min_client_subnet_ipv6)
1111 else O_DEC(opt, "max-ecs-tree-size-ipv4", max_ecs_tree_size_ipv4)
1112 else O_DEC(opt, "max-ecs-tree-size-ipv6", max_ecs_tree_size_ipv6)
1113 else O_YNO(opt, "client-subnet-always-forward:",
1114 client_subnet_always_forward)
1115 #endif
1116 #ifdef USE_DNSTAP
1117 else O_YNO(opt, "dnstap-enable", dnstap)
1118 else O_YNO(opt, "dnstap-bidirectional", dnstap_bidirectional)
1119 else O_STR(opt, "dnstap-socket-path", dnstap_socket_path)
1120 else O_STR(opt, "dnstap-ip", dnstap_ip)
1121 else O_YNO(opt, "dnstap-tls", dnstap_tls)
1122 else O_STR(opt, "dnstap-tls-server-name", dnstap_tls_server_name)
1123 else O_STR(opt, "dnstap-tls-cert-bundle", dnstap_tls_cert_bundle)
1124 else O_STR(opt, "dnstap-tls-client-key-file",
1125 dnstap_tls_client_key_file)
1126 else O_STR(opt, "dnstap-tls-client-cert-file",
1127 dnstap_tls_client_cert_file)
1128 else O_YNO(opt, "dnstap-send-identity", dnstap_send_identity)
1129 else O_YNO(opt, "dnstap-send-version", dnstap_send_version)
1130 else O_STR(opt, "dnstap-identity", dnstap_identity)
1131 else O_STR(opt, "dnstap-version", dnstap_version)
1132 else O_YNO(opt, "dnstap-log-resolver-query-messages",
1133 dnstap_log_resolver_query_messages)
1134 else O_YNO(opt, "dnstap-log-resolver-response-messages",
1135 dnstap_log_resolver_response_messages)
1136 else O_YNO(opt, "dnstap-log-client-query-messages",
1137 dnstap_log_client_query_messages)
1138 else O_YNO(opt, "dnstap-log-client-response-messages",
1139 dnstap_log_client_response_messages)
1140 else O_YNO(opt, "dnstap-log-forwarder-query-messages",
1141 dnstap_log_forwarder_query_messages)
1142 else O_YNO(opt, "dnstap-log-forwarder-response-messages",
1143 dnstap_log_forwarder_response_messages)
1144 #endif
1145 #ifdef USE_DNSCRYPT
1146 else O_YNO(opt, "dnscrypt-enable", dnscrypt)
1147 else O_DEC(opt, "dnscrypt-port", dnscrypt_port)
1148 else O_STR(opt, "dnscrypt-provider", dnscrypt_provider)
1149 else O_LST(opt, "dnscrypt-provider-cert", dnscrypt_provider_cert)
1150 else O_LST(opt, "dnscrypt-provider-cert-rotated", dnscrypt_provider_cert_rotated)
1151 else O_LST(opt, "dnscrypt-secret-key", dnscrypt_secret_key)
1152 else O_MEM(opt, "dnscrypt-shared-secret-cache-size",
1153 dnscrypt_shared_secret_cache_size)
1154 else O_DEC(opt, "dnscrypt-shared-secret-cache-slabs",
1155 dnscrypt_shared_secret_cache_slabs)
1156 else O_MEM(opt, "dnscrypt-nonce-cache-size",
1157 dnscrypt_nonce_cache_size)
1158 else O_DEC(opt, "dnscrypt-nonce-cache-slabs",
1159 dnscrypt_nonce_cache_slabs)
1160 #endif
1161 else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones)
1162 else O_YNO(opt, "insecure-lan-zones", insecure_lan_zones)
1163 else O_DEC(opt, "max-udp-size", max_udp_size)
1164 else O_LST(opt, "python-script", python_script)
1165 else O_LST(opt, "dynlib-file", dynlib_file)
1166 else O_YNO(opt, "disable-dnssec-lame-check", disable_dnssec_lame_check)
1167 else O_DEC(opt, "ip-ratelimit", ip_ratelimit)
1168 else O_DEC(opt, "ratelimit", ratelimit)
1169 else O_MEM(opt, "ip-ratelimit-size", ip_ratelimit_size)
1170 else O_MEM(opt, "ratelimit-size", ratelimit_size)
1171 else O_DEC(opt, "ip-ratelimit-slabs", ip_ratelimit_slabs)
1172 else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs)
1173 else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain)
1174 else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain)
1175 else O_DEC(opt, "ip-ratelimit-factor", ip_ratelimit_factor)
1176 else O_DEC(opt, "ratelimit-factor", ratelimit_factor)
1177 else O_DEC(opt, "fast-server-num", fast_server_num)
1178 else O_DEC(opt, "fast-server-permil", fast_server_permil)
1179 else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min)
1180 else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max)
1181 else O_YNO(opt, "qname-minimisation", qname_minimisation)
1182 else O_YNO(opt, "qname-minimisation-strict", qname_minimisation_strict)
1183 else O_IFC(opt, "define-tag", num_tags, tagname)
1184 else O_LTG(opt, "local-zone-tag", local_zone_tags)
1185 else O_LTG(opt, "access-control-tag", acl_tags)
1186 else O_LTG(opt, "response-ip-tag", respip_tags)
1187 else O_LS3(opt, "local-zone-override", local_zone_overrides)
1188 else O_LS3(opt, "access-control-tag-action", acl_tag_actions)
1189 else O_LS3(opt, "access-control-tag-data", acl_tag_datas)
1190 else O_LS2(opt, "access-control-view", acl_view)
1191 else O_YNO(opt, "pad-responses", pad_responses)
1192 else O_DEC(opt, "pad-responses-block-size", pad_responses_block_size)
1193 else O_YNO(opt, "pad-queries", pad_queries)
1194 else O_DEC(opt, "pad-queries-block-size", pad_queries_block_size)
1195 else O_LS2(opt, "edns-client-strings", edns_client_strings)
1196 #ifdef USE_IPSECMOD
1197 else O_YNO(opt, "ipsecmod-enabled", ipsecmod_enabled)
1198 else O_YNO(opt, "ipsecmod-ignore-bogus", ipsecmod_ignore_bogus)
1199 else O_STR(opt, "ipsecmod-hook", ipsecmod_hook)
1200 else O_DEC(opt, "ipsecmod-max-ttl", ipsecmod_max_ttl)
1201 else O_LST(opt, "ipsecmod-whitelist", ipsecmod_whitelist)
1202 else O_YNO(opt, "ipsecmod-strict", ipsecmod_strict)
1203 #endif
1204 #ifdef USE_CACHEDB
1205 else O_STR(opt, "backend", cachedb_backend)
1206 else O_STR(opt, "secret-seed", cachedb_secret)
1207 #ifdef USE_REDIS
1208 else O_STR(opt, "redis-server-host", redis_server_host)
1209 else O_DEC(opt, "redis-server-port", redis_server_port)
1210 else O_DEC(opt, "redis-timeout", redis_timeout)
1211 else O_YNO(opt, "redis-expire-records", redis_expire_records)
1212 #endif /* USE_REDIS */
1213 #endif /* USE_CACHEDB */
1214 #ifdef USE_IPSET
1215 else O_STR(opt, "name-v4", ipset_name_v4)
1216 else O_STR(opt, "name-v6", ipset_name_v6)
1217 #endif
1218 /* not here:
1219 * outgoing-permit, outgoing-avoid - have list of ports
1220 * local-zone - zones and nodefault variables
1221 * local-data - see below
1222 * local-data-ptr - converted to local-data entries
1223 * stub-zone, name, stub-addr, stub-host, stub-prime
1224 * forward-zone, name, forward-addr, forward-host
1225 */
1226 else return 0;
1227 return 1;
1228 }
1229
1230 /** initialize the global cfg_parser object */
1231 static void
create_cfg_parser(struct config_file * cfg,char * filename,const char * chroot)1232 create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot)
1233 {
1234 static struct config_parser_state st;
1235 cfg_parser = &st;
1236 cfg_parser->filename = filename;
1237 cfg_parser->line = 1;
1238 cfg_parser->errors = 0;
1239 cfg_parser->cfg = cfg;
1240 cfg_parser->chroot = chroot;
1241 init_cfg_parse();
1242 }
1243
1244 int
config_read(struct config_file * cfg,const char * filename,const char * chroot)1245 config_read(struct config_file* cfg, const char* filename, const char* chroot)
1246 {
1247 FILE *in;
1248 char *fname = (char*)filename;
1249 #ifdef HAVE_GLOB
1250 glob_t g;
1251 size_t i;
1252 int r, flags;
1253 #endif
1254 if(!fname)
1255 return 1;
1256
1257 /* check for wildcards */
1258 #ifdef HAVE_GLOB
1259 if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') &&
1260 !strchr(fname, '{') && !strchr(fname, '~'))) {
1261 verbose(VERB_QUERY, "wildcard found, processing %s", fname);
1262 flags = 0
1263 #ifdef GLOB_ERR
1264 | GLOB_ERR
1265 #endif
1266 #ifdef GLOB_NOSORT
1267 | GLOB_NOSORT
1268 #endif
1269 #ifdef GLOB_BRACE
1270 | GLOB_BRACE
1271 #endif
1272 #ifdef GLOB_TILDE
1273 | GLOB_TILDE
1274 #endif
1275 ;
1276 memset(&g, 0, sizeof(g));
1277 r = glob(fname, flags, NULL, &g);
1278 if(r) {
1279 /* some error */
1280 globfree(&g);
1281 if(r == GLOB_NOMATCH) {
1282 verbose(VERB_QUERY, "include: "
1283 "no matches for %s", fname);
1284 return 1;
1285 } else if(r == GLOB_NOSPACE) {
1286 log_err("include: %s: "
1287 "fnametern out of memory", fname);
1288 } else if(r == GLOB_ABORTED) {
1289 log_err("wildcard include: %s: expansion "
1290 "aborted (%s)", fname, strerror(errno));
1291 } else {
1292 log_err("wildcard include: %s: expansion "
1293 "failed (%s)", fname, strerror(errno));
1294 }
1295 /* ignore globs that yield no files */
1296 return 1;
1297 }
1298 /* process files found, if any */
1299 for(i=0; i<(size_t)g.gl_pathc; i++) {
1300 if(!config_read(cfg, g.gl_pathv[i], chroot)) {
1301 log_err("error reading wildcard "
1302 "include: %s", g.gl_pathv[i]);
1303 globfree(&g);
1304 return 0;
1305 }
1306 }
1307 globfree(&g);
1308 return 1;
1309 }
1310 #endif /* HAVE_GLOB */
1311
1312 in = fopen(fname, "r");
1313 if(!in) {
1314 log_err("Could not open %s: %s", fname, strerror(errno));
1315 return 0;
1316 }
1317 create_cfg_parser(cfg, fname, chroot);
1318 ub_c_in = in;
1319 ub_c_parse();
1320 fclose(in);
1321
1322 if(!cfg->dnscrypt) cfg->dnscrypt_port = 0;
1323
1324 if(cfg_parser->errors != 0) {
1325 fprintf(stderr, "read %s failed: %d errors in configuration file\n",
1326 fname, cfg_parser->errors);
1327 errno=EINVAL;
1328 return 0;
1329 }
1330
1331 return 1;
1332 }
1333
cfg_stub_find(struct config_stub *** pp,const char * nm)1334 struct config_stub* cfg_stub_find(struct config_stub*** pp, const char* nm)
1335 {
1336 struct config_stub* p = *(*pp);
1337 while(p) {
1338 if(strcmp(p->name, nm) == 0)
1339 return p;
1340 (*pp) = &p->next;
1341 p = p->next;
1342 }
1343 return NULL;
1344 }
1345
1346 void
config_delstrlist(struct config_strlist * p)1347 config_delstrlist(struct config_strlist* p)
1348 {
1349 struct config_strlist *np;
1350 while(p) {
1351 np = p->next;
1352 free(p->str);
1353 free(p);
1354 p = np;
1355 }
1356 }
1357
1358 void
config_deldblstrlist(struct config_str2list * p)1359 config_deldblstrlist(struct config_str2list* p)
1360 {
1361 struct config_str2list *np;
1362 while(p) {
1363 np = p->next;
1364 free(p->str);
1365 free(p->str2);
1366 free(p);
1367 p = np;
1368 }
1369 }
1370
1371 void
config_deltrplstrlist(struct config_str3list * p)1372 config_deltrplstrlist(struct config_str3list* p)
1373 {
1374 struct config_str3list *np;
1375 while(p) {
1376 np = p->next;
1377 free(p->str);
1378 free(p->str2);
1379 free(p->str3);
1380 free(p);
1381 p = np;
1382 }
1383 }
1384
1385 void
config_delauth(struct config_auth * p)1386 config_delauth(struct config_auth* p)
1387 {
1388 if(!p) return;
1389 free(p->name);
1390 config_delstrlist(p->masters);
1391 config_delstrlist(p->urls);
1392 config_delstrlist(p->allow_notify);
1393 free(p->zonefile);
1394 free(p->rpz_taglist);
1395 free(p->rpz_action_override);
1396 free(p->rpz_cname);
1397 free(p->rpz_log_name);
1398 free(p);
1399 }
1400
1401 void
config_delauths(struct config_auth * p)1402 config_delauths(struct config_auth* p)
1403 {
1404 struct config_auth* np;
1405 while(p) {
1406 np = p->next;
1407 config_delauth(p);
1408 p = np;
1409 }
1410 }
1411
1412 void
config_delstub(struct config_stub * p)1413 config_delstub(struct config_stub* p)
1414 {
1415 if(!p) return;
1416 free(p->name);
1417 config_delstrlist(p->hosts);
1418 config_delstrlist(p->addrs);
1419 free(p);
1420 }
1421
1422 void
config_delstubs(struct config_stub * p)1423 config_delstubs(struct config_stub* p)
1424 {
1425 struct config_stub* np;
1426 while(p) {
1427 np = p->next;
1428 config_delstub(p);
1429 p = np;
1430 }
1431 }
1432
1433 void
config_delview(struct config_view * p)1434 config_delview(struct config_view* p)
1435 {
1436 if(!p) return;
1437 free(p->name);
1438 config_deldblstrlist(p->local_zones);
1439 config_delstrlist(p->local_zones_nodefault);
1440 #ifdef USE_IPSET
1441 config_delstrlist(p->local_zones_ipset);
1442 #endif
1443 config_delstrlist(p->local_data);
1444 free(p);
1445 }
1446
1447 void
config_delviews(struct config_view * p)1448 config_delviews(struct config_view* p)
1449 {
1450 struct config_view* np;
1451 while(p) {
1452 np = p->next;
1453 config_delview(p);
1454 p = np;
1455 }
1456 }
1457
1458 void
config_del_strarray(char ** array,int num)1459 config_del_strarray(char** array, int num)
1460 {
1461 int i;
1462 if(!array)
1463 return;
1464 for(i=0; i<num; i++) {
1465 free(array[i]);
1466 }
1467 free(array);
1468 }
1469
1470 void
config_del_strbytelist(struct config_strbytelist * p)1471 config_del_strbytelist(struct config_strbytelist* p)
1472 {
1473 struct config_strbytelist* np;
1474 while(p) {
1475 np = p->next;
1476 free(p->str);
1477 free(p->str2);
1478 free(p);
1479 p = np;
1480 }
1481 }
1482
1483 void
config_delete(struct config_file * cfg)1484 config_delete(struct config_file* cfg)
1485 {
1486 if(!cfg) return;
1487 free(cfg->username);
1488 free(cfg->chrootdir);
1489 free(cfg->directory);
1490 free(cfg->logfile);
1491 free(cfg->pidfile);
1492 free(cfg->target_fetch_policy);
1493 free(cfg->ssl_service_key);
1494 free(cfg->ssl_service_pem);
1495 free(cfg->tls_cert_bundle);
1496 config_delstrlist(cfg->tls_additional_port);
1497 config_delstrlist(cfg->tls_session_ticket_keys.first);
1498 free(cfg->tls_ciphers);
1499 free(cfg->tls_ciphersuites);
1500 free(cfg->http_endpoint);
1501 if(cfg->log_identity) {
1502 log_ident_revert_to_default();
1503 free(cfg->log_identity);
1504 }
1505 config_del_strarray(cfg->ifs, cfg->num_ifs);
1506 config_del_strarray(cfg->out_ifs, cfg->num_out_ifs);
1507 config_delstubs(cfg->stubs);
1508 config_delstubs(cfg->forwards);
1509 config_delauths(cfg->auths);
1510 config_delviews(cfg->views);
1511 config_delstrlist(cfg->donotqueryaddrs);
1512 config_delstrlist(cfg->root_hints);
1513 #ifdef CLIENT_SUBNET
1514 config_delstrlist(cfg->client_subnet);
1515 config_delstrlist(cfg->client_subnet_zone);
1516 #endif
1517 free(cfg->identity);
1518 free(cfg->version);
1519 free(cfg->nsid_cfg_str);
1520 free(cfg->nsid);
1521 free(cfg->module_conf);
1522 free(cfg->outgoing_avail_ports);
1523 config_delstrlist(cfg->caps_whitelist);
1524 config_delstrlist(cfg->private_address);
1525 config_delstrlist(cfg->private_domain);
1526 config_delstrlist(cfg->auto_trust_anchor_file_list);
1527 config_delstrlist(cfg->trust_anchor_file_list);
1528 config_delstrlist(cfg->trusted_keys_file_list);
1529 config_delstrlist(cfg->trust_anchor_list);
1530 config_delstrlist(cfg->domain_insecure);
1531 config_deldblstrlist(cfg->acls);
1532 config_deldblstrlist(cfg->tcp_connection_limits);
1533 free(cfg->val_nsec3_key_iterations);
1534 config_deldblstrlist(cfg->local_zones);
1535 config_delstrlist(cfg->local_zones_nodefault);
1536 #ifdef USE_IPSET
1537 config_delstrlist(cfg->local_zones_ipset);
1538 #endif
1539 config_delstrlist(cfg->local_data);
1540 config_deltrplstrlist(cfg->local_zone_overrides);
1541 config_del_strarray(cfg->tagname, cfg->num_tags);
1542 config_del_strbytelist(cfg->local_zone_tags);
1543 config_del_strbytelist(cfg->acl_tags);
1544 config_del_strbytelist(cfg->respip_tags);
1545 config_deltrplstrlist(cfg->acl_tag_actions);
1546 config_deltrplstrlist(cfg->acl_tag_datas);
1547 config_delstrlist(cfg->control_ifs.first);
1548 free(cfg->server_key_file);
1549 free(cfg->server_cert_file);
1550 free(cfg->control_key_file);
1551 free(cfg->control_cert_file);
1552 free(cfg->dns64_prefix);
1553 config_delstrlist(cfg->dns64_ignore_aaaa);
1554 free(cfg->dnstap_socket_path);
1555 free(cfg->dnstap_ip);
1556 free(cfg->dnstap_tls_server_name);
1557 free(cfg->dnstap_tls_cert_bundle);
1558 free(cfg->dnstap_tls_client_key_file);
1559 free(cfg->dnstap_tls_client_cert_file);
1560 free(cfg->dnstap_identity);
1561 free(cfg->dnstap_version);
1562 config_deldblstrlist(cfg->ratelimit_for_domain);
1563 config_deldblstrlist(cfg->ratelimit_below_domain);
1564 config_delstrlist(cfg->python_script);
1565 config_delstrlist(cfg->dynlib_file);
1566 config_deldblstrlist(cfg->edns_client_strings);
1567 #ifdef USE_IPSECMOD
1568 free(cfg->ipsecmod_hook);
1569 config_delstrlist(cfg->ipsecmod_whitelist);
1570 #endif
1571 #ifdef USE_CACHEDB
1572 free(cfg->cachedb_backend);
1573 free(cfg->cachedb_secret);
1574 #ifdef USE_REDIS
1575 free(cfg->redis_server_host);
1576 #endif /* USE_REDIS */
1577 #endif /* USE_CACHEDB */
1578 #ifdef USE_IPSET
1579 free(cfg->ipset_name_v4);
1580 free(cfg->ipset_name_v6);
1581 #endif
1582 free(cfg);
1583 }
1584
1585 static void
init_outgoing_availports(int * a,int num)1586 init_outgoing_availports(int* a, int num)
1587 {
1588 /* generated with make iana_update */
1589 const int iana_assigned[] = {
1590 #include "util/iana_ports.inc"
1591 -1 }; /* end marker to put behind trailing comma */
1592
1593 int i;
1594 /* do not use <1024, that could be trouble with the system, privs */
1595 for(i=1024; i<num; i++) {
1596 a[i] = i;
1597 }
1598 /* create empty spot at 49152 to keep ephemeral ports available
1599 * to other programs */
1600 for(i=49152; i<49152+256; i++)
1601 a[i] = 0;
1602 /* pick out all the IANA assigned ports */
1603 for(i=0; iana_assigned[i]!=-1; i++) {
1604 if(iana_assigned[i] < num)
1605 a[iana_assigned[i]] = 0;
1606 }
1607 }
1608
1609 int
cfg_mark_ports(const char * str,int allow,int * avail,int num)1610 cfg_mark_ports(const char* str, int allow, int* avail, int num)
1611 {
1612 char* mid = strchr(str, '-');
1613 #ifdef DISABLE_EXPLICIT_PORT_RANDOMISATION
1614 log_warn("Explicit port randomisation disabled, ignoring "
1615 "outgoing-port-permit and outgoing-port-avoid configuration "
1616 "options");
1617 #endif
1618 if(!mid) {
1619 int port = atoi(str);
1620 if(port == 0 && strcmp(str, "0") != 0) {
1621 log_err("cannot parse port number '%s'", str);
1622 return 0;
1623 }
1624 if(port < num)
1625 avail[port] = (allow?port:0);
1626 } else {
1627 int i, low, high = atoi(mid+1);
1628 char buf[16];
1629 if(high == 0 && strcmp(mid+1, "0") != 0) {
1630 log_err("cannot parse port number '%s'", mid+1);
1631 return 0;
1632 }
1633 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) {
1634 log_err("cannot parse port number '%s'", str);
1635 return 0;
1636 }
1637 if(mid > str)
1638 memcpy(buf, str, (size_t)(mid-str));
1639 buf[mid-str] = 0;
1640 low = atoi(buf);
1641 if(low == 0 && strcmp(buf, "0") != 0) {
1642 log_err("cannot parse port number '%s'", buf);
1643 return 0;
1644 }
1645 for(i=low; i<=high; i++) {
1646 if(i < num)
1647 avail[i] = (allow?i:0);
1648 }
1649 return 1;
1650 }
1651 return 1;
1652 }
1653
1654 int
cfg_scan_ports(int * avail,int num)1655 cfg_scan_ports(int* avail, int num)
1656 {
1657 int i;
1658 int count = 0;
1659 for(i=0; i<num; i++) {
1660 if(avail[i])
1661 count++;
1662 }
1663 return count;
1664 }
1665
cfg_condense_ports(struct config_file * cfg,int ** avail)1666 int cfg_condense_ports(struct config_file* cfg, int** avail)
1667 {
1668 int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536);
1669 int i, at = 0;
1670 *avail = NULL;
1671 if(num == 0)
1672 return 0;
1673 *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int));
1674 if(!*avail)
1675 return 0;
1676 for(i=0; i<65536; i++) {
1677 if(cfg->outgoing_avail_ports[i])
1678 (*avail)[at++] = cfg->outgoing_avail_ports[i];
1679 }
1680 log_assert(at == num);
1681 return num;
1682 }
1683
1684 /** print error with file and line number */
ub_c_error_va_list(const char * fmt,va_list args)1685 static void ub_c_error_va_list(const char *fmt, va_list args)
1686 {
1687 cfg_parser->errors++;
1688 fprintf(stderr, "%s:%d: error: ", cfg_parser->filename,
1689 cfg_parser->line);
1690 vfprintf(stderr, fmt, args);
1691 fprintf(stderr, "\n");
1692 }
1693
1694 /** print error with file and line number */
ub_c_error_msg(const char * fmt,...)1695 void ub_c_error_msg(const char* fmt, ...)
1696 {
1697 va_list args;
1698 va_start(args, fmt);
1699 ub_c_error_va_list(fmt, args);
1700 va_end(args);
1701 }
1702
ub_c_error(const char * str)1703 void ub_c_error(const char *str)
1704 {
1705 cfg_parser->errors++;
1706 fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename,
1707 cfg_parser->line, str);
1708 }
1709
ub_c_wrap(void)1710 int ub_c_wrap(void)
1711 {
1712 return 1;
1713 }
1714
cfg_strlist_append(struct config_strlist_head * list,char * item)1715 int cfg_strlist_append(struct config_strlist_head* list, char* item)
1716 {
1717 struct config_strlist *s;
1718 if(!item || !list) {
1719 free(item);
1720 return 0;
1721 }
1722 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1723 if(!s) {
1724 free(item);
1725 return 0;
1726 }
1727 s->str = item;
1728 s->next = NULL;
1729 if(list->last)
1730 list->last->next = s;
1731 else
1732 list->first = s;
1733 list->last = s;
1734 return 1;
1735 }
1736
1737 int
cfg_region_strlist_insert(struct regional * region,struct config_strlist ** head,char * item)1738 cfg_region_strlist_insert(struct regional* region,
1739 struct config_strlist** head, char* item)
1740 {
1741 struct config_strlist *s;
1742 if(!item || !head)
1743 return 0;
1744 s = (struct config_strlist*)regional_alloc_zero(region,
1745 sizeof(struct config_strlist));
1746 if(!s)
1747 return 0;
1748 s->str = item;
1749 s->next = *head;
1750 *head = s;
1751 return 1;
1752 }
1753
1754 struct config_strlist*
cfg_strlist_find(struct config_strlist * head,const char * item)1755 cfg_strlist_find(struct config_strlist* head, const char *item)
1756 {
1757 struct config_strlist *s = head;
1758 if(!head){
1759 return NULL;
1760 }
1761 while(s) {
1762 if(strcmp(s->str, item) == 0) {
1763 return s;
1764 }
1765 s = s->next;
1766 }
1767 return NULL;
1768 }
1769
1770 int
cfg_strlist_insert(struct config_strlist ** head,char * item)1771 cfg_strlist_insert(struct config_strlist** head, char* item)
1772 {
1773 struct config_strlist *s;
1774 if(!item || !head) {
1775 free(item);
1776 return 0;
1777 }
1778 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1779 if(!s) {
1780 free(item);
1781 return 0;
1782 }
1783 s->str = item;
1784 s->next = *head;
1785 *head = s;
1786 return 1;
1787 }
1788
1789 int
cfg_strlist_append_ex(struct config_strlist ** head,char * item)1790 cfg_strlist_append_ex(struct config_strlist** head, char* item)
1791 {
1792 struct config_strlist *s;
1793 if(!item || !head)
1794 return 0;
1795 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1796 if(!s)
1797 return 0;
1798 s->str = item;
1799 s->next = NULL;
1800
1801 if (*head==NULL) {
1802 *head = s;
1803 } else {
1804 struct config_strlist *last = *head;
1805 while (last->next!=NULL) {
1806 last = last->next;
1807 }
1808 last->next = s;
1809 }
1810
1811 return 1;
1812 }
1813
1814 int
cfg_str2list_insert(struct config_str2list ** head,char * item,char * i2)1815 cfg_str2list_insert(struct config_str2list** head, char* item, char* i2)
1816 {
1817 struct config_str2list *s;
1818 if(!item || !i2 || !head) {
1819 free(item);
1820 free(i2);
1821 return 0;
1822 }
1823 s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list));
1824 if(!s) {
1825 free(item);
1826 free(i2);
1827 return 0;
1828 }
1829 s->str = item;
1830 s->str2 = i2;
1831 s->next = *head;
1832 *head = s;
1833 return 1;
1834 }
1835
1836 int
cfg_str3list_insert(struct config_str3list ** head,char * item,char * i2,char * i3)1837 cfg_str3list_insert(struct config_str3list** head, char* item, char* i2,
1838 char* i3)
1839 {
1840 struct config_str3list *s;
1841 if(!item || !i2 || !i3 || !head)
1842 return 0;
1843 s = (struct config_str3list*)calloc(1, sizeof(struct config_str3list));
1844 if(!s)
1845 return 0;
1846 s->str = item;
1847 s->str2 = i2;
1848 s->str3 = i3;
1849 s->next = *head;
1850 *head = s;
1851 return 1;
1852 }
1853
1854 int
cfg_strbytelist_insert(struct config_strbytelist ** head,char * item,uint8_t * i2,size_t i2len)1855 cfg_strbytelist_insert(struct config_strbytelist** head, char* item,
1856 uint8_t* i2, size_t i2len)
1857 {
1858 struct config_strbytelist* s;
1859 if(!item || !i2 || !head)
1860 return 0;
1861 s = (struct config_strbytelist*)calloc(1, sizeof(*s));
1862 if(!s)
1863 return 0;
1864 s->str = item;
1865 s->str2 = i2;
1866 s->str2len = i2len;
1867 s->next = *head;
1868 *head = s;
1869 return 1;
1870 }
1871
1872 time_t
cfg_convert_timeval(const char * str)1873 cfg_convert_timeval(const char* str)
1874 {
1875 time_t t;
1876 struct tm tm;
1877 memset(&tm, 0, sizeof(tm));
1878 if(strlen(str) < 14)
1879 return 0;
1880 if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon,
1881 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6)
1882 return 0;
1883 tm.tm_year -= 1900;
1884 tm.tm_mon--;
1885 /* Check values */
1886 if (tm.tm_year < 70) return 0;
1887 if (tm.tm_mon < 0 || tm.tm_mon > 11) return 0;
1888 if (tm.tm_mday < 1 || tm.tm_mday > 31) return 0;
1889 if (tm.tm_hour < 0 || tm.tm_hour > 23) return 0;
1890 if (tm.tm_min < 0 || tm.tm_min > 59) return 0;
1891 if (tm.tm_sec < 0 || tm.tm_sec > 59) return 0;
1892 /* call ldns conversion function */
1893 t = sldns_mktime_from_utc(&tm);
1894 return t;
1895 }
1896
1897 int
cfg_count_numbers(const char * s)1898 cfg_count_numbers(const char* s)
1899 {
1900 /* format ::= (sp num)+ sp */
1901 /* num ::= [-](0-9)+ */
1902 /* sp ::= (space|tab)* */
1903 int num = 0;
1904 while(*s) {
1905 while(*s && isspace((unsigned char)*s))
1906 s++;
1907 if(!*s) /* end of string */
1908 break;
1909 if(*s == '-')
1910 s++;
1911 if(!*s) /* only - not allowed */
1912 return 0;
1913 if(!isdigit((unsigned char)*s)) /* bad character */
1914 return 0;
1915 while(*s && isdigit((unsigned char)*s))
1916 s++;
1917 num++;
1918 }
1919 return num;
1920 }
1921
1922 /** all digit number */
isalldigit(const char * str,size_t l)1923 static int isalldigit(const char* str, size_t l)
1924 {
1925 size_t i;
1926 for(i=0; i<l; i++)
1927 if(!isdigit((unsigned char)str[i]))
1928 return 0;
1929 return 1;
1930 }
1931
1932 int
cfg_parse_memsize(const char * str,size_t * res)1933 cfg_parse_memsize(const char* str, size_t* res)
1934 {
1935 size_t len;
1936 size_t mult = 1;
1937 if(!str || (len=(size_t)strlen(str)) == 0) {
1938 log_err("not a size: '%s'", str);
1939 return 0;
1940 }
1941 if(isalldigit(str, len)) {
1942 *res = (size_t)atol(str);
1943 return 1;
1944 }
1945 /* check appended num */
1946 while(len>0 && str[len-1]==' ')
1947 len--;
1948 if(len > 1 && str[len-1] == 'b')
1949 len--;
1950 else if(len > 1 && str[len-1] == 'B')
1951 len--;
1952
1953 if(len > 1 && tolower((unsigned char)str[len-1]) == 'g')
1954 mult = 1024*1024*1024;
1955 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm')
1956 mult = 1024*1024;
1957 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k')
1958 mult = 1024;
1959 else if(len > 0 && isdigit((unsigned char)str[len-1]))
1960 mult = 1;
1961 else {
1962 log_err("unknown size specifier: '%s'", str);
1963 return 0;
1964 }
1965 while(len>1 && str[len-2]==' ')
1966 len--;
1967
1968 if(!isalldigit(str, len-1)) {
1969 log_err("unknown size specifier: '%s'", str);
1970 return 0;
1971 }
1972 *res = ((size_t)atol(str)) * mult;
1973 return 1;
1974 }
1975
1976 int
find_tag_id(struct config_file * cfg,const char * tag)1977 find_tag_id(struct config_file* cfg, const char* tag)
1978 {
1979 int i;
1980 for(i=0; i<cfg->num_tags; i++) {
1981 if(strcmp(cfg->tagname[i], tag) == 0)
1982 return i;
1983 }
1984 return -1;
1985 }
1986
1987 int
config_add_tag(struct config_file * cfg,const char * tag)1988 config_add_tag(struct config_file* cfg, const char* tag)
1989 {
1990 char** newarray;
1991 char* newtag;
1992 if(find_tag_id(cfg, tag) != -1)
1993 return 1; /* nothing to do */
1994 newarray = (char**)malloc(sizeof(char*)*(cfg->num_tags+1));
1995 if(!newarray)
1996 return 0;
1997 newtag = strdup(tag);
1998 if(!newtag) {
1999 free(newarray);
2000 return 0;
2001 }
2002 if(cfg->tagname) {
2003 memcpy(newarray, cfg->tagname, sizeof(char*)*cfg->num_tags);
2004 free(cfg->tagname);
2005 }
2006 newarray[cfg->num_tags++] = newtag;
2007 cfg->tagname = newarray;
2008 return 1;
2009 }
2010
2011 /** set a bit in a bit array */
2012 static void
cfg_set_bit(uint8_t * bitlist,size_t len,int id)2013 cfg_set_bit(uint8_t* bitlist, size_t len, int id)
2014 {
2015 int pos = id/8;
2016 log_assert((size_t)pos < len);
2017 (void)len;
2018 bitlist[pos] |= 1<<(id%8);
2019 }
2020
config_parse_taglist(struct config_file * cfg,char * str,size_t * listlen)2021 uint8_t* config_parse_taglist(struct config_file* cfg, char* str,
2022 size_t* listlen)
2023 {
2024 uint8_t* taglist = NULL;
2025 size_t len = 0;
2026 char* p, *s;
2027
2028 /* allocate */
2029 if(cfg->num_tags == 0) {
2030 log_err("parse taglist, but no tags defined");
2031 return 0;
2032 }
2033 len = (size_t)(cfg->num_tags+7)/8;
2034 taglist = calloc(1, len);
2035 if(!taglist) {
2036 log_err("out of memory");
2037 return 0;
2038 }
2039
2040 /* parse */
2041 s = str;
2042 while((p=strsep(&s, " \t\n")) != NULL) {
2043 if(*p) {
2044 int id = find_tag_id(cfg, p);
2045 /* set this bit in the bitlist */
2046 if(id == -1) {
2047 log_err("unknown tag: %s", p);
2048 free(taglist);
2049 return 0;
2050 }
2051 cfg_set_bit(taglist, len, id);
2052 }
2053 }
2054
2055 *listlen = len;
2056 return taglist;
2057 }
2058
cfg_parse_nsid(const char * str,uint16_t * nsid_len)2059 uint8_t* cfg_parse_nsid(const char* str, uint16_t* nsid_len)
2060 {
2061 uint8_t* nsid = NULL;
2062
2063 if (strncasecmp(str, "ascii_", 6) == 0) {
2064 if ((nsid = (uint8_t *)strdup(str + 6)))
2065 *nsid_len = strlen(str + 6);
2066
2067 } else if (strlen(str) % 2) {
2068 ; /* hex string has even number of characters */
2069 }
2070
2071 else if (*str && (nsid = calloc(1, strlen(str) / 2))) {
2072 const char *ch;
2073 uint8_t *dp;
2074
2075 for ( ch = str, dp = nsid
2076 ; isxdigit(ch[0]) && isxdigit(ch[1])
2077 ; ch += 2, dp++) {
2078 *dp = (uint8_t)sldns_hexdigit_to_int(ch[0]) * 16;
2079 *dp += (uint8_t)sldns_hexdigit_to_int(ch[1]);
2080 }
2081 if (*ch) {
2082 free(nsid);
2083 nsid = NULL;
2084 } else
2085 *nsid_len = strlen(str) / 2;
2086 }
2087 return nsid;
2088 }
2089
2090
config_taglist2str(struct config_file * cfg,uint8_t * taglist,size_t taglen)2091 char* config_taglist2str(struct config_file* cfg, uint8_t* taglist,
2092 size_t taglen)
2093 {
2094 char buf[10240];
2095 size_t i, j, len = 0;
2096 buf[0] = 0;
2097 for(i=0; i<taglen; i++) {
2098 if(taglist[i] == 0)
2099 continue;
2100 for(j=0; j<8; j++) {
2101 if((taglist[i] & (1<<j)) != 0) {
2102 size_t id = i*8 + j;
2103 snprintf(buf+len, sizeof(buf)-len, "%s%s",
2104 (len==0?"":" "), cfg->tagname[id]);
2105 len += strlen(buf+len);
2106 }
2107 }
2108 }
2109 return strdup(buf);
2110 }
2111
taglist_intersect(uint8_t * list1,size_t list1len,const uint8_t * list2,size_t list2len)2112 int taglist_intersect(uint8_t* list1, size_t list1len, const uint8_t* list2,
2113 size_t list2len)
2114 {
2115 size_t i;
2116 if(!list1 || !list2)
2117 return 0;
2118 for(i=0; i<list1len && i<list2len; i++) {
2119 if((list1[i] & list2[i]) != 0)
2120 return 1;
2121 }
2122 return 0;
2123 }
2124
2125 void
config_apply(struct config_file * config)2126 config_apply(struct config_file* config)
2127 {
2128 MAX_TTL = (time_t)config->max_ttl;
2129 MIN_TTL = (time_t)config->min_ttl;
2130 SERVE_EXPIRED = config->serve_expired;
2131 SERVE_EXPIRED_TTL = (time_t)config->serve_expired_ttl;
2132 SERVE_EXPIRED_REPLY_TTL = (time_t)config->serve_expired_reply_ttl;
2133 SERVE_ORIGINAL_TTL = config->serve_original_ttl;
2134 MAX_NEG_TTL = (time_t)config->max_negative_ttl;
2135 RTT_MIN_TIMEOUT = config->infra_cache_min_rtt;
2136 EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size;
2137 MINIMAL_RESPONSES = config->minimal_responses;
2138 RRSET_ROUNDROBIN = config->rrset_roundrobin;
2139 LOG_TAG_QUERYREPLY = config->log_tag_queryreply;
2140 UNKNOWN_SERVER_NICENESS = config->unknown_server_time_limit;
2141 log_set_time_asc(config->log_time_ascii);
2142 autr_permit_small_holddown = config->permit_small_holddown;
2143 stream_wait_max = config->stream_wait_size;
2144 http2_query_buffer_max = config->http_query_buffer_size;
2145 http2_response_buffer_max = config->http_response_buffer_size;
2146 }
2147
config_lookup_uid(struct config_file * cfg)2148 void config_lookup_uid(struct config_file* cfg)
2149 {
2150 #ifdef HAVE_GETPWNAM
2151 /* translate username into uid and gid */
2152 if(cfg->username && cfg->username[0]) {
2153 struct passwd *pwd;
2154 if((pwd = getpwnam(cfg->username)) != NULL) {
2155 cfg_uid = pwd->pw_uid;
2156 cfg_gid = pwd->pw_gid;
2157 }
2158 }
2159 #else
2160 (void)cfg;
2161 #endif
2162 }
2163
2164 /**
2165 * Calculate string length of full pathname in original filesys
2166 * @param fname: the path name to convert.
2167 * Must not be null or empty.
2168 * @param cfg: config struct for chroot and chdir (if set).
2169 * @param use_chdir: if false, only chroot is applied.
2170 * @return length of string.
2171 * remember to allocate one more for 0 at end in mallocs.
2172 */
2173 static size_t
strlen_after_chroot(const char * fname,struct config_file * cfg,int use_chdir)2174 strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
2175 {
2176 size_t len = 0;
2177 int slashit = 0;
2178 if(cfg->chrootdir && cfg->chrootdir[0] &&
2179 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
2180 /* already full pathname, return it */
2181 return strlen(fname);
2182 }
2183 /* chroot */
2184 if(cfg->chrootdir && cfg->chrootdir[0]) {
2185 /* start with chrootdir */
2186 len += strlen(cfg->chrootdir);
2187 slashit = 1;
2188 }
2189 /* chdir */
2190 #ifdef UB_ON_WINDOWS
2191 if(fname[0] != 0 && fname[1] == ':') {
2192 /* full path, no chdir */
2193 } else
2194 #endif
2195 if(fname[0] == '/' || !use_chdir) {
2196 /* full path, no chdir */
2197 } else if(cfg->directory && cfg->directory[0]) {
2198 /* prepend chdir */
2199 if(slashit && cfg->directory[0] != '/')
2200 len++;
2201 if(cfg->chrootdir && cfg->chrootdir[0] &&
2202 strncmp(cfg->chrootdir, cfg->directory,
2203 strlen(cfg->chrootdir)) == 0)
2204 len += strlen(cfg->directory)-strlen(cfg->chrootdir);
2205 else len += strlen(cfg->directory);
2206 slashit = 1;
2207 }
2208 /* fname */
2209 if(slashit && fname[0] != '/')
2210 len++;
2211 len += strlen(fname);
2212 return len;
2213 }
2214
2215 char*
fname_after_chroot(const char * fname,struct config_file * cfg,int use_chdir)2216 fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
2217 {
2218 size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1;
2219 int slashit = 0;
2220 char* buf = (char*)malloc(len);
2221 if(!buf)
2222 return NULL;
2223 buf[0] = 0;
2224 /* is fname already in chroot ? */
2225 if(cfg->chrootdir && cfg->chrootdir[0] &&
2226 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
2227 /* already full pathname, return it */
2228 (void)strlcpy(buf, fname, len);
2229 buf[len-1] = 0;
2230 return buf;
2231 }
2232 /* chroot */
2233 if(cfg->chrootdir && cfg->chrootdir[0]) {
2234 /* start with chrootdir */
2235 (void)strlcpy(buf, cfg->chrootdir, len);
2236 slashit = 1;
2237 }
2238 #ifdef UB_ON_WINDOWS
2239 if(fname[0] != 0 && fname[1] == ':') {
2240 /* full path, no chdir */
2241 } else
2242 #endif
2243 /* chdir */
2244 if(fname[0] == '/' || !use_chdir) {
2245 /* full path, no chdir */
2246 } else if(cfg->directory && cfg->directory[0]) {
2247 /* prepend chdir */
2248 if(slashit && cfg->directory[0] != '/')
2249 (void)strlcat(buf, "/", len);
2250 /* is the directory already in the chroot? */
2251 if(cfg->chrootdir && cfg->chrootdir[0] &&
2252 strncmp(cfg->chrootdir, cfg->directory,
2253 strlen(cfg->chrootdir)) == 0)
2254 (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir),
2255 len);
2256 else (void)strlcat(buf, cfg->directory, len);
2257 slashit = 1;
2258 }
2259 /* fname */
2260 if(slashit && fname[0] != '/')
2261 (void)strlcat(buf, "/", len);
2262 (void)strlcat(buf, fname, len);
2263 buf[len-1] = 0;
2264 return buf;
2265 }
2266
2267 /** return next space character in string */
next_space_pos(const char * str)2268 static char* next_space_pos(const char* str)
2269 {
2270 char* sp = strchr(str, ' ');
2271 char* tab = strchr(str, '\t');
2272 if(!tab && !sp)
2273 return NULL;
2274 if(!sp) return tab;
2275 if(!tab) return sp;
2276 return (sp<tab)?sp:tab;
2277 }
2278
2279 /** return last space character in string */
last_space_pos(const char * str)2280 static char* last_space_pos(const char* str)
2281 {
2282 char* sp = strrchr(str, ' ');
2283 char* tab = strrchr(str, '\t');
2284 if(!tab && !sp)
2285 return NULL;
2286 if(!sp) return tab;
2287 if(!tab) return sp;
2288 return (sp>tab)?sp:tab;
2289 }
2290
2291 int
cfg_parse_local_zone(struct config_file * cfg,const char * val)2292 cfg_parse_local_zone(struct config_file* cfg, const char* val)
2293 {
2294 const char *type, *name_end, *name;
2295 char buf[256];
2296
2297 /* parse it as: [zone_name] [between stuff] [zone_type] */
2298 name = val;
2299 while(*name && isspace((unsigned char)*name))
2300 name++;
2301 if(!*name) {
2302 log_err("syntax error: too short: %s", val);
2303 return 0;
2304 }
2305 name_end = next_space_pos(name);
2306 if(!name_end || !*name_end) {
2307 log_err("syntax error: expected zone type: %s", val);
2308 return 0;
2309 }
2310 if (name_end - name > 255) {
2311 log_err("syntax error: bad zone name: %s", val);
2312 return 0;
2313 }
2314 (void)strlcpy(buf, name, sizeof(buf));
2315 buf[name_end-name] = '\0';
2316
2317 type = last_space_pos(name_end);
2318 while(type && *type && isspace((unsigned char)*type))
2319 type++;
2320 if(!type || !*type) {
2321 log_err("syntax error: expected zone type: %s", val);
2322 return 0;
2323 }
2324
2325 if(strcmp(type, "nodefault")==0) {
2326 return cfg_strlist_insert(&cfg->local_zones_nodefault,
2327 strdup(name));
2328 #ifdef USE_IPSET
2329 } else if(strcmp(type, "ipset")==0) {
2330 return cfg_strlist_insert(&cfg->local_zones_ipset,
2331 strdup(name));
2332 #endif
2333 } else {
2334 return cfg_str2list_insert(&cfg->local_zones, strdup(buf),
2335 strdup(type));
2336 }
2337 }
2338
cfg_ptr_reverse(char * str)2339 char* cfg_ptr_reverse(char* str)
2340 {
2341 char* ip, *ip_end;
2342 char* name;
2343 char* result;
2344 char buf[1024];
2345 struct sockaddr_storage addr;
2346 socklen_t addrlen;
2347
2348 /* parse it as: [IP] [between stuff] [name] */
2349 ip = str;
2350 while(*ip && isspace((unsigned char)*ip))
2351 ip++;
2352 if(!*ip) {
2353 log_err("syntax error: too short: %s", str);
2354 return NULL;
2355 }
2356 ip_end = next_space_pos(ip);
2357 if(!ip_end || !*ip_end) {
2358 log_err("syntax error: expected name: %s", str);
2359 return NULL;
2360 }
2361
2362 name = last_space_pos(ip_end);
2363 if(!name || !*name) {
2364 log_err("syntax error: expected name: %s", str);
2365 return NULL;
2366 }
2367
2368 sscanf(ip, "%100s", buf);
2369 buf[sizeof(buf)-1]=0;
2370
2371 if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) {
2372 log_err("syntax error: cannot parse address: %s", str);
2373 return NULL;
2374 }
2375
2376 /* reverse IPv4:
2377 * ddd.ddd.ddd.ddd.in-addr-arpa.
2378 * IPv6: (h.){32}.ip6.arpa. */
2379
2380 if(addr_is_ip6(&addr, addrlen)) {
2381 uint8_t ad[16];
2382 const char* hex = "0123456789abcdef";
2383 char *p = buf;
2384 int i;
2385 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr,
2386 sizeof(ad));
2387 for(i=15; i>=0; i--) {
2388 uint8_t b = ad[i];
2389 *p++ = hex[ (b&0x0f) ];
2390 *p++ = '.';
2391 *p++ = hex[ (b&0xf0) >> 4 ];
2392 *p++ = '.';
2393 }
2394 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. ");
2395 } else {
2396 uint8_t ad[4];
2397 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr,
2398 sizeof(ad));
2399 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ",
2400 (unsigned)ad[3], (unsigned)ad[2],
2401 (unsigned)ad[1], (unsigned)ad[0]);
2402 }
2403
2404 /* printed the reverse address, now the between goop and name on end */
2405 while(*ip_end && isspace((unsigned char)*ip_end))
2406 ip_end++;
2407 if(name>ip_end) {
2408 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s",
2409 (int)(name-ip_end), ip_end);
2410 }
2411 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name);
2412
2413 result = strdup(buf);
2414 if(!result) {
2415 log_err("out of memory parsing %s", str);
2416 return NULL;
2417 }
2418 return result;
2419 }
2420
2421 #ifdef UB_ON_WINDOWS
2422 char*
w_lookup_reg_str(const char * key,const char * name)2423 w_lookup_reg_str(const char* key, const char* name)
2424 {
2425 HKEY hk = NULL;
2426 DWORD type = 0;
2427 BYTE buf[1024];
2428 DWORD len = (DWORD)sizeof(buf);
2429 LONG ret;
2430 char* result = NULL;
2431 ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk);
2432 if(ret == ERROR_FILE_NOT_FOUND)
2433 return NULL; /* key does not exist */
2434 else if(ret != ERROR_SUCCESS) {
2435 log_err("RegOpenKeyEx failed");
2436 return NULL;
2437 }
2438 ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len);
2439 if(RegCloseKey(hk))
2440 log_err("RegCloseKey");
2441 if(ret == ERROR_FILE_NOT_FOUND)
2442 return NULL; /* name does not exist */
2443 else if(ret != ERROR_SUCCESS) {
2444 log_err("RegQueryValueEx failed");
2445 return NULL;
2446 }
2447 if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) {
2448 buf[sizeof(buf)-1] = 0;
2449 buf[sizeof(buf)-2] = 0; /* for multi_sz */
2450 result = strdup((char*)buf);
2451 if(!result) log_err("out of memory");
2452 }
2453 return result;
2454 }
2455
w_config_adjust_directory(struct config_file * cfg)2456 void w_config_adjust_directory(struct config_file* cfg)
2457 {
2458 if(cfg->directory && cfg->directory[0]) {
2459 TCHAR dirbuf[2*MAX_PATH+4];
2460 if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) {
2461 /* get executable path, and if that contains
2462 * directories, snip off the filename part */
2463 dirbuf[0] = 0;
2464 if(!GetModuleFileName(NULL, dirbuf, MAX_PATH))
2465 log_err("could not GetModuleFileName");
2466 if(strrchr(dirbuf, '\\')) {
2467 (strrchr(dirbuf, '\\'))[0] = 0;
2468 } else log_err("GetModuleFileName had no path");
2469 if(dirbuf[0]) {
2470 /* adjust directory for later lookups to work*/
2471 free(cfg->directory);
2472 cfg->directory = memdup(dirbuf, strlen(dirbuf)+1);
2473 }
2474 }
2475 }
2476 }
2477 #endif /* UB_ON_WINDOWS */
2478
errinf(struct module_qstate * qstate,const char * str)2479 void errinf(struct module_qstate* qstate, const char* str)
2480 {
2481 struct config_strlist* p;
2482 if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !str)
2483 return;
2484 p = (struct config_strlist*)regional_alloc(qstate->region, sizeof(*p));
2485 if(!p) {
2486 log_err("malloc failure in validator-error-info string");
2487 return;
2488 }
2489 p->next = NULL;
2490 p->str = regional_strdup(qstate->region, str);
2491 if(!p->str) {
2492 log_err("malloc failure in validator-error-info string");
2493 return;
2494 }
2495 /* add at end */
2496 if(qstate->errinf) {
2497 struct config_strlist* q = qstate->errinf;
2498 while(q->next)
2499 q = q->next;
2500 q->next = p;
2501 } else qstate->errinf = p;
2502 }
2503
errinf_origin(struct module_qstate * qstate,struct sock_list * origin)2504 void errinf_origin(struct module_qstate* qstate, struct sock_list *origin)
2505 {
2506 struct sock_list* p;
2507 if(qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail)
2508 return;
2509 for(p=origin; p; p=p->next) {
2510 char buf[256];
2511 if(p == origin)
2512 snprintf(buf, sizeof(buf), "from ");
2513 else snprintf(buf, sizeof(buf), "and ");
2514 if(p->len == 0)
2515 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf),
2516 "cache");
2517 else
2518 addr_to_str(&p->addr, p->len, buf+strlen(buf),
2519 sizeof(buf)-strlen(buf));
2520 errinf(qstate, buf);
2521 }
2522 }
2523
errinf_to_str_bogus(struct module_qstate * qstate)2524 char* errinf_to_str_bogus(struct module_qstate* qstate)
2525 {
2526 char buf[20480];
2527 char* p = buf;
2528 size_t left = sizeof(buf);
2529 struct config_strlist* s;
2530 char dname[LDNS_MAX_DOMAINLEN+1];
2531 char t[16], c[16];
2532 sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t));
2533 sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c));
2534 dname_str(qstate->qinfo.qname, dname);
2535 snprintf(p, left, "validation failure <%s %s %s>:", dname, t, c);
2536 left -= strlen(p); p += strlen(p);
2537 if(!qstate->errinf)
2538 snprintf(p, left, " misc failure");
2539 else for(s=qstate->errinf; s; s=s->next) {
2540 snprintf(p, left, " %s", s->str);
2541 left -= strlen(p); p += strlen(p);
2542 }
2543 p = strdup(buf);
2544 if(!p)
2545 log_err("malloc failure in errinf_to_str");
2546 return p;
2547 }
2548
errinf_to_str_servfail(struct module_qstate * qstate)2549 char* errinf_to_str_servfail(struct module_qstate* qstate)
2550 {
2551 char buf[20480];
2552 char* p = buf;
2553 size_t left = sizeof(buf);
2554 struct config_strlist* s;
2555 char dname[LDNS_MAX_DOMAINLEN+1];
2556 char t[16], c[16];
2557 sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t));
2558 sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c));
2559 dname_str(qstate->qinfo.qname, dname);
2560 snprintf(p, left, "SERVFAIL <%s %s %s>:", dname, t, c);
2561 left -= strlen(p); p += strlen(p);
2562 if(!qstate->errinf)
2563 snprintf(p, left, " misc failure");
2564 else for(s=qstate->errinf; s; s=s->next) {
2565 snprintf(p, left, " %s", s->str);
2566 left -= strlen(p); p += strlen(p);
2567 }
2568 p = strdup(buf);
2569 if(!p)
2570 log_err("malloc failure in errinf_to_str");
2571 return p;
2572 }
2573
errinf_rrset(struct module_qstate * qstate,struct ub_packed_rrset_key * rr)2574 void errinf_rrset(struct module_qstate* qstate, struct ub_packed_rrset_key *rr)
2575 {
2576 char buf[1024];
2577 char dname[LDNS_MAX_DOMAINLEN+1];
2578 char t[16], c[16];
2579 if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !rr)
2580 return;
2581 sldns_wire2str_type_buf(ntohs(rr->rk.type), t, sizeof(t));
2582 sldns_wire2str_class_buf(ntohs(rr->rk.rrset_class), c, sizeof(c));
2583 dname_str(rr->rk.dname, dname);
2584 snprintf(buf, sizeof(buf), "for <%s %s %s>", dname, t, c);
2585 errinf(qstate, buf);
2586 }
2587
errinf_dname(struct module_qstate * qstate,const char * str,uint8_t * dname)2588 void errinf_dname(struct module_qstate* qstate, const char* str, uint8_t* dname)
2589 {
2590 char b[1024];
2591 char buf[LDNS_MAX_DOMAINLEN+1];
2592 if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !str || !dname)
2593 return;
2594 dname_str(dname, buf);
2595 snprintf(b, sizeof(b), "%s %s", str, buf);
2596 errinf(qstate, b);
2597 }
2598
options_remote_is_address(struct config_file * cfg)2599 int options_remote_is_address(struct config_file* cfg)
2600 {
2601 if(!cfg->remote_control_enable) return 0;
2602 if(!cfg->control_ifs.first) return 1;
2603 if(!cfg->control_ifs.first->str) return 1;
2604 if(cfg->control_ifs.first->str[0] == 0) return 1;
2605 return (cfg->control_ifs.first->str[0] != '/');
2606 }
2607
2608