2 * util/config_file.h - reads and stores the config file for unbound.
4 * Copyright (c) 2007, NLnet Labs. All rights reserved.
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39 * This file contains functions for the config file.
42 #ifndef UTIL_CONFIG_FILE_H
43 #define UTIL_CONFIG_FILE_H
47 struct config_strlist;
48 struct config_str2list;
49 struct config_str3list;
50 struct config_strbytelist;
53 struct ub_packed_rrset_key;
56 /** List head for strlist processing, used for append operation. */
57 struct config_strlist_head {
58 /** first in list of text items */
59 struct config_strlist* first;
60 /** last in list of text items */
61 struct config_strlist* last;
65 * The configuration options.
66 * Strings are malloced.
69 /** verbosity level as specified in the config file */
72 /** statistics interval (in seconds) */
74 /** if false, statistics values are reset after printing them */
76 /** if true, the statistics are kept in greater detail */
79 /** number of threads to create */
82 /** port on which queries are answered. */
84 /** do ip4 query support. */
86 /** do ip6 query support. */
88 /** prefer ip4 upstream queries. */
90 /** prefer ip6 upstream queries. */
92 /** do udp query support. */
94 /** do tcp query support. */
96 /** tcp upstream queries (no UDP upstream queries) */
98 /** udp upstream enabled when no UDP downstream is enabled (do_udp no)*/
99 int udp_upstream_without_downstream;
100 /** maximum segment size of tcp socket which queries are answered */
102 /** maximum segment size of tcp socket for outgoing queries */
103 int outgoing_tcp_mss;
104 /** tcp idle timeout, in msec */
105 int tcp_idle_timeout;
106 /** do edns tcp keepalive */
107 int do_tcp_keepalive;
108 /** tcp keepalive timeout, in msec */
109 int tcp_keepalive_timeout;
111 /** private key file for dnstcp-ssl service (enabled if not NULL) */
112 char* ssl_service_key;
113 /** public key file for dnstcp-ssl service */
114 char* ssl_service_pem;
115 /** port on which to provide ssl service */
117 /** if outgoing tcp connections use SSL */
119 /** cert bundle for outgoing connections */
120 char* tls_cert_bundle;
121 /** should the system certificate store get added to the cert bundle */
123 /** additional tls ports */
124 struct config_strlist* tls_additional_port;
125 /** secret key used to encrypt and decrypt TLS session ticket */
126 struct config_strlist_head tls_session_ticket_keys;
129 /** TLS chiphersuites (TLSv1.3) */
130 char* tls_ciphersuites;
131 /** if SNI is to be used */
134 /** port on which to provide DNS over HTTPS service */
136 /** endpoint for HTTP service */
138 /** MAX_CONCURRENT_STREAMS HTTP/2 setting */
139 uint32_t http_max_streams;
140 /** maximum size of all HTTP2 query buffers combined. */
141 size_t http_query_buffer_size;
142 /** maximum size of all HTTP2 response buffers combined. */
143 size_t http_response_buffer_size;
144 /** set TCP_NODELAY option for http sockets */
147 /** outgoing port range number of ports (per thread) */
148 int outgoing_num_ports;
149 /** number of outgoing tcp buffers per (per thread) */
150 size_t outgoing_num_tcp;
151 /** number of incoming tcp buffers per (per thread) */
152 size_t incoming_num_tcp;
153 /** allowed udp port numbers, array with 0 if not allowed */
154 int* outgoing_avail_ports;
156 /** EDNS buffer size to use */
157 size_t edns_buffer_size;
158 /** size of the stream wait buffers, max */
159 size_t stream_wait_size;
160 /** number of bytes buffer size for DNS messages */
161 size_t msg_buffer_size;
162 /** size of the message cache */
163 size_t msg_cache_size;
164 /** slabs in the message cache. */
165 size_t msg_cache_slabs;
166 /** number of queries every thread can service */
167 size_t num_queries_per_thread;
168 /** number of msec to wait before items can be jostled out */
170 /** size of the rrset cache */
171 size_t rrset_cache_size;
172 /** slabs in the rrset cache */
173 size_t rrset_cache_slabs;
174 /** host cache ttl in seconds */
176 /** number of slabs in the infra host cache */
177 size_t infra_cache_slabs;
178 /** max number of hosts in the infra cache */
179 size_t infra_cache_numhosts;
180 /** min value for infra cache rtt */
181 int infra_cache_min_rtt;
182 /** delay close of udp-timeouted ports, if 0 no delayclose. in msec */
185 /** the target fetch policy for the iterator */
186 char* target_fetch_policy;
187 /** percent*10, how many times in 1000 to pick from the fastest
189 int fast_server_permil;
190 /** number of fastest server to select from */
191 size_t fast_server_num;
193 /** automatic interface for incoming messages. Uses ipv6 remapping,
194 * and recvmsg/sendmsg ancillary data to detect interfaces, boolean */
196 /** SO_RCVBUF size to set on port 53 UDP socket */
198 /** SO_SNDBUF size to set on port 53 UDP socket */
200 /** SO_REUSEPORT requested on port 53 sockets */
202 /** IP_TRANSPARENT socket option requested on port 53 sockets */
204 /** IP_FREEBIND socket option request on port 53 sockets */
206 /** IP_TOS socket option requested on port 53 sockets */
209 /** number of interfaces to open. If 0 default all interfaces. */
211 /** interface description strings (IP addresses) */
214 /** number of outgoing interfaces to open.
215 * If 0 default all interfaces. */
217 /** outgoing interface description strings (IP addresses) */
220 /** the root hints */
221 struct config_strlist* root_hints;
222 /** the stub definitions, linked list */
223 struct config_stub* stubs;
224 /** the forward zone definitions, linked list */
225 struct config_stub* forwards;
226 /** the auth zone definitions, linked list */
227 struct config_auth* auths;
228 /** the views definitions, linked list */
229 struct config_view* views;
230 /** list of donotquery addresses, linked list */
231 struct config_strlist* donotqueryaddrs;
233 /** list of servers we send edns-client-subnet option to and
234 * accept option from, linked list */
235 struct config_strlist* client_subnet;
236 /** list of zones we send edns-client-subnet option for */
237 struct config_strlist* client_subnet_zone;
238 /** opcode assigned by IANA for edns0-client-subnet option */
239 uint16_t client_subnet_opcode;
240 /** Do not check whitelist if incoming query contains an ECS record */
241 int client_subnet_always_forward;
242 /** Subnet length we are willing to give up privacy for */
243 uint8_t max_client_subnet_ipv4;
244 uint8_t max_client_subnet_ipv6;
245 /** Minimum subnet length we are willing to answer */
246 uint8_t min_client_subnet_ipv4;
247 uint8_t min_client_subnet_ipv6;
248 /** Max number of nodes in the ECS radix tree */
249 uint32_t max_ecs_tree_size_ipv4;
250 uint32_t max_ecs_tree_size_ipv6;
252 /** list of access control entries, linked list */
253 struct config_str2list* acls;
254 /** use default localhost donotqueryaddr entries */
255 int donotquery_localhost;
257 /** list of tcp connection limitss, linked list */
258 struct config_str2list* tcp_connection_limits;
260 /** harden against very small edns buffer sizes */
261 int harden_short_bufsize;
262 /** harden against very large query sizes */
263 int harden_large_queries;
264 /** harden against spoofed glue (out of zone data) */
266 /** harden against receiving no DNSSEC data for trust anchor */
267 int harden_dnssec_stripped;
268 /** harden against queries that fall under known nxdomain names */
269 int harden_below_nxdomain;
270 /** harden the referral path, query for NS,A,AAAA and validate */
271 int harden_referral_path;
272 /** harden against algorithm downgrade */
273 int harden_algo_downgrade;
274 /** use 0x20 bits in query as random ID bits */
275 int use_caps_bits_for_id;
276 /** 0x20 whitelist, domains that do not use capsforid */
277 struct config_strlist* caps_whitelist;
278 /** strip away these private addrs from answers, no DNS Rebinding */
279 struct config_strlist* private_address;
280 /** allow domain (and subdomains) to use private address space */
281 struct config_strlist* private_domain;
282 /** what threshold for unwanted action. */
283 size_t unwanted_threshold;
284 /** the number of seconds maximal TTL used for RRsets and messages */
286 /** the number of seconds minimum TTL used for RRsets and messages */
288 /** the number of seconds maximal negative TTL for SOA in auth */
289 int max_negative_ttl;
290 /** if prefetching of messages should be performed. */
292 /** if prefetching of DNSKEYs should be performed. */
294 /** deny queries of type ANY with an empty answer */
297 /** chrootdir, if not "" or chroot will be done */
299 /** username to change to, if not "". */
301 /** working directory */
303 /** filename to log to. */
305 /** pidfile to write pid to. */
308 /** should log messages be sent to syslogd */
310 /** log timestamp in ascii UTC */
312 /** log queries with one line per query */
314 /** log replies with one line per reply */
316 /** tag log_queries and log_replies for filtering */
317 int log_tag_queryreply;
318 /** log every local-zone hit **/
319 int log_local_actions;
320 /** log servfails with a reason */
322 /** log identity to report */
325 /** do not report identity (id.server, hostname.bind) */
327 /** do not report version (version.server, version.bind) */
329 /** do not report trustanchor (trustanchor.unbound) */
330 int hide_trustanchor;
331 /** identity, hostname is returned if "". */
333 /** version, package version returned if "". */
336 /** the module configuration string */
339 /** files with trusted DS and DNSKEYs in zonefile format, list */
340 struct config_strlist* trust_anchor_file_list;
341 /** list of trustanchor keys, linked list */
342 struct config_strlist* trust_anchor_list;
343 /** files with 5011 autotrust tracked keys */
344 struct config_strlist* auto_trust_anchor_file_list;
345 /** files with trusted DNSKEYs in named.conf format, list */
346 struct config_strlist* trusted_keys_file_list;
347 /** insecure domain list */
348 struct config_strlist* domain_insecure;
349 /** send key tag query */
350 int trust_anchor_signaling;
351 /** enable root key sentinel */
352 int root_key_sentinel;
354 /** if not 0, this value is the validation date for RRSIGs */
355 int32_t val_date_override;
356 /** the minimum for signature clock skew */
357 int32_t val_sig_skew_min;
358 /** the maximum for signature clock skew */
359 int32_t val_sig_skew_max;
360 /** this value sets the number of seconds before revalidating bogus */
362 /** should validator clean additional section for secure msgs */
363 int val_clean_additional;
364 /** log bogus messages by the validator */
366 /** squelch val_log_level to log - this is library goes to callback */
368 /** should validator allow bogus messages to go through */
369 int val_permissive_mode;
370 /** use cached NSEC records to synthesise (negative) answers */
372 /** ignore the CD flag in incoming queries and refuse them bogus data */
374 /** serve expired entries and prefetch them */
376 /** serve expired entries until TTL after expiration */
377 int serve_expired_ttl;
378 /** reset serve expired TTL after failed update attempt */
379 int serve_expired_ttl_reset;
380 /** TTL for the serve expired replies */
381 int serve_expired_reply_ttl;
382 /** serve expired entries only after trying to update the entries and this
383 * timeout (in milliseconds) is reached */
384 int serve_expired_client_timeout;
385 /** nsec3 maximum iterations per key size, string */
386 char* val_nsec3_key_iterations;
387 /** autotrust add holddown time, in seconds */
388 unsigned int add_holddown;
389 /** autotrust del holddown time, in seconds */
390 unsigned int del_holddown;
391 /** autotrust keep_missing time, in seconds. 0 is forever. */
392 unsigned int keep_missing;
393 /** permit small holddown values, allowing 5011 rollover very fast */
394 int permit_small_holddown;
396 /** size of the key cache */
397 size_t key_cache_size;
398 /** slabs in the key cache. */
399 size_t key_cache_slabs;
400 /** size of the neg cache */
401 size_t neg_cache_size;
403 /** local zones config */
404 struct config_str2list* local_zones;
405 /** local zones nodefault list */
406 struct config_strlist* local_zones_nodefault;
408 /** local zones ipset list */
409 struct config_strlist* local_zones_ipset;
411 /** do not add any default local zone */
412 int local_zones_disable_default;
413 /** local data RRs configured */
414 struct config_strlist* local_data;
415 /** local zone override types per netblock */
416 struct config_str3list* local_zone_overrides;
417 /** unblock lan zones (reverse lookups for AS112 zones) */
418 int unblock_lan_zones;
419 /** insecure lan zones (don't validate AS112 zones) */
420 int insecure_lan_zones;
421 /** list of zonename, tagbitlist */
422 struct config_strbytelist* local_zone_tags;
423 /** list of aclname, tagbitlist */
424 struct config_strbytelist* acl_tags;
425 /** list of aclname, tagname, localzonetype */
426 struct config_str3list* acl_tag_actions;
427 /** list of aclname, tagname, redirectdata */
428 struct config_str3list* acl_tag_datas;
429 /** list of aclname, view*/
430 struct config_str2list* acl_view;
431 /** list of IP-netblock, tagbitlist */
432 struct config_strbytelist* respip_tags;
433 /** list of response-driven access control entries, linked list */
434 struct config_str2list* respip_actions;
435 /** RRs configured for response-driven access controls */
436 struct config_str2list* respip_data;
437 /** tag list, array with tagname[i] is malloced string */
439 /** number of items in the taglist */
442 /** remote control section. enable toggle. */
443 int remote_control_enable;
444 /** the interfaces the remote control should listen on */
445 struct config_strlist_head control_ifs;
446 /** if the use-cert option is set */
447 int control_use_cert;
448 /** port number for the control port */
450 /** private key file for server */
451 char* server_key_file;
452 /** certificate file for server */
453 char* server_cert_file;
454 /** private key file for unbound-control */
455 char* control_key_file;
456 /** certificate file for unbound-control */
457 char* control_cert_file;
459 /** Python script file */
460 struct config_strlist* python_script;
462 /** Dynamic library file */
463 struct config_strlist* dynlib_file;
465 /** Use systemd socket activation. */
468 /** daemonize, i.e. fork into the background. */
471 /* minimal response when positive answer */
472 int minimal_responses;
474 /* RRSet roundrobin */
475 int rrset_roundrobin;
477 /* wait time for unknown server in msec */
478 int unknown_server_time_limit;
480 /* maximum UDP response size */
486 /* Synthetize all AAAA record despite the presence of an authoritative one */
488 /** ignore AAAAs for these domain names and use A record anyway */
489 struct config_strlist* dns64_ignore_aaaa;
491 /** true to enable dnstap support */
493 /** using bidirectional frame streams if true */
494 int dnstap_bidirectional;
495 /** dnstap socket path */
496 char* dnstap_socket_path;
499 /** dnstap TLS enable */
501 /** dnstap tls server authentication name */
502 char* dnstap_tls_server_name;
503 /** dnstap server cert bundle */
504 char* dnstap_tls_cert_bundle;
505 /** dnstap client key for client authentication */
506 char* dnstap_tls_client_key_file;
507 /** dnstap client cert for client authentication */
508 char* dnstap_tls_client_cert_file;
509 /** true to send "identity" via dnstap */
510 int dnstap_send_identity;
511 /** true to send "version" via dnstap */
512 int dnstap_send_version;
513 /** dnstap "identity", hostname is used if "". */
514 char* dnstap_identity;
515 /** dnstap "version", package version is used if "". */
516 char* dnstap_version;
518 /** true to log dnstap RESOLVER_QUERY message events */
519 int dnstap_log_resolver_query_messages;
520 /** true to log dnstap RESOLVER_RESPONSE message events */
521 int dnstap_log_resolver_response_messages;
522 /** true to log dnstap CLIENT_QUERY message events */
523 int dnstap_log_client_query_messages;
524 /** true to log dnstap CLIENT_RESPONSE message events */
525 int dnstap_log_client_response_messages;
526 /** true to log dnstap FORWARDER_QUERY message events */
527 int dnstap_log_forwarder_query_messages;
528 /** true to log dnstap FORWARDER_RESPONSE message events */
529 int dnstap_log_forwarder_response_messages;
531 /** true to disable DNSSEC lameness check in iterator */
532 int disable_dnssec_lame_check;
534 /** ratelimit for ip addresses. 0 is off, otherwise qps (unless overridden) */
536 /** number of slabs for ip_ratelimit cache */
537 size_t ip_ratelimit_slabs;
538 /** memory size in bytes for ip_ratelimit cache */
539 size_t ip_ratelimit_size;
540 /** ip_ratelimit factor, 0 blocks all, 10 allows 1/10 of traffic */
541 int ip_ratelimit_factor;
543 /** ratelimit for domains. 0 is off, otherwise qps (unless overridden) */
545 /** number of slabs for ratelimit cache */
546 size_t ratelimit_slabs;
547 /** memory size in bytes for ratelimit cache */
548 size_t ratelimit_size;
549 /** ratelimits for domain (exact match) */
550 struct config_str2list* ratelimit_for_domain;
551 /** ratelimits below domain */
552 struct config_str2list* ratelimit_below_domain;
553 /** ratelimit factor, 0 blocks all, 10 allows 1/10 of traffic */
554 int ratelimit_factor;
555 /** minimise outgoing QNAME and hide original QTYPE if possible */
556 int qname_minimisation;
557 /** minimise QNAME in strict mode, minimise according to RFC.
558 * Do not apply fallback */
559 int qname_minimisation_strict;
560 /** SHM data - true if shm is enabled */
562 /** SHM data - key for the shm */
565 /** list of EDNS client tag entries, linked list */
566 struct config_str2list* edns_client_tags;
567 /** EDNS opcode to use for EDNS client tags */
568 uint16_t edns_client_tag_opcode;
571 /** true to enable dnscrypt */
573 /** port on which to provide dnscrypt service */
575 /** provider name 2.dnscrypt-cert.example.com */
576 char* dnscrypt_provider;
577 /** dnscrypt secret keys 1.key */
578 struct config_strlist* dnscrypt_secret_key;
579 /** dnscrypt provider certs 1.cert */
580 struct config_strlist* dnscrypt_provider_cert;
581 /** dnscrypt provider certs 1.cert which have been rotated and should not be
582 * advertised through DNS's providername TXT record but are required to be
583 * able to handle existing traffic using the old cert. */
584 struct config_strlist* dnscrypt_provider_cert_rotated;
585 /** memory size in bytes for dnscrypt shared secrets cache */
586 size_t dnscrypt_shared_secret_cache_size;
587 /** number of slabs for dnscrypt shared secrets cache */
588 size_t dnscrypt_shared_secret_cache_slabs;
589 /** memory size in bytes for dnscrypt nonces cache */
590 size_t dnscrypt_nonce_cache_size;
591 /** number of slabs for dnscrypt nonces cache */
592 size_t dnscrypt_nonce_cache_slabs;
595 /** false to bypass the IPsec module */
596 int ipsecmod_enabled;
597 /** whitelisted domains for ipsecmod */
598 struct config_strlist* ipsecmod_whitelist;
599 /** path to external hook */
601 /** true to proceed even with a bogus IPSECKEY */
602 int ipsecmod_ignore_bogus;
603 /** max TTL for the A/AAAA records that call the hook */
604 int ipsecmod_max_ttl;
605 /** false to proceed even when ipsecmod_hook fails */
611 /** backend DB name */
612 char* cachedb_backend;
613 /** secret seed for hash key calculation */
614 char* cachedb_secret;
616 /** redis server's IP address or host name */
617 char* redis_server_host;
618 /** redis server's TCP port */
619 int redis_server_port;
620 /** timeout (in ms) for communication with the redis server */
622 /** set timeout on redis records based on DNS response ttl */
623 int redis_expire_records;
634 /** from cfg username, after daemonize setup performed */
635 extern uid_t cfg_uid;
636 /** from cfg username, after daemonize setup performed */
637 extern gid_t cfg_gid;
638 /** debug and enable small timeouts */
639 extern int autr_permit_small_holddown;
640 /** size (in bytes) of stream wait buffers max */
641 extern size_t stream_wait_max;
642 /** size (in bytes) of all total HTTP2 query buffers max */
643 extern size_t http2_query_buffer_max;
644 /** size (in bytes) of all total HTTP2 response buffers max */
645 extern size_t http2_response_buffer_max;
648 * Stub config options
652 struct config_stub* next;
653 /** domain name (in text) of the stub apex domain */
655 /** list of stub nameserver hosts (domain name) */
656 struct config_strlist* hosts;
657 /** list of stub nameserver addresses (IP address) */
658 struct config_strlist* addrs;
659 /** if stub-prime is set */
661 /** if forward-first is set (failover to without if fails) */
663 /** use SSL for queries to this stub */
670 * Auth config options
674 struct config_auth* next;
675 /** domain name (in text) of the auth apex domain */
677 /** list of masters */
678 struct config_strlist* masters;
680 struct config_strlist* urls;
681 /** list of allow-notify */
682 struct config_strlist* allow_notify;
683 /** zonefile (or NULL) */
685 /** provide downstream answers */
687 /** provide upstream answers */
689 /** fallback to recursion to authorities if zone expired and other
690 * reasons perhaps (like, query bogus) */
691 int fallback_enabled;
692 /** this zone is used to create local-zone policies */
694 /** rpz tags (or NULL) */
695 uint8_t* rpz_taglist;
696 /** length of the taglist (in bytes) */
697 size_t rpz_taglistlen;
698 /** Override RPZ action for this zone, regardless of zone content */
699 char* rpz_action_override;
700 /** Log when this RPZ policy is applied */
702 /** Display this name in the log when RPZ policy is applied */
704 /** Always reply with this CNAME target if the cname override action is
710 * View config options
714 struct config_view* next;
718 struct config_str2list* local_zones;
719 /** local data RRs */
720 struct config_strlist* local_data;
721 /** local zones nodefault list */
722 struct config_strlist* local_zones_nodefault;
724 /** local zones ipset list */
725 struct config_strlist* local_zones_ipset;
727 /** Fallback to global local_zones when there is no match in the view
728 * view specific tree. 1 for yes, 0 for no */
730 /** predefined actions for particular IP address responses */
731 struct config_str2list* respip_actions;
732 /** data complementing the 'redirect' response IP actions */
733 struct config_str2list* respip_data;
737 * List of strings for config options
739 struct config_strlist {
740 /** next item in list */
741 struct config_strlist* next;
742 /** config option string */
747 * List of two strings for config options
749 struct config_str2list {
750 /** next item in list */
751 struct config_str2list* next;
759 * List of three strings for config options
761 struct config_str3list {
762 /** next item in list */
763 struct config_str3list* next;
774 * List of string, bytestring for config options
776 struct config_strbytelist {
777 /** next item in list */
778 struct config_strbytelist* next;
781 /** second bytestring */
787 * Create config file structure. Filled with default values.
788 * @return: the new structure or NULL on memory error.
790 struct config_file* config_create(void);
793 * Create config file structure for library use. Filled with default values.
794 * @return: the new structure or NULL on memory error.
796 struct config_file* config_create_forlib(void);
799 * Read the config file from the specified filename.
800 * @param config: where options are stored into, must be freshly created.
801 * @param filename: name of configfile. If NULL nothing is done.
802 * @param chroot: if not NULL, the chroot dir currently in use (for include).
803 * @return: false on error. In that case errno is set, ENOENT means
806 int config_read(struct config_file* config, const char* filename,
810 * Destroy the config file structure.
811 * @param config: to delete.
813 void config_delete(struct config_file* config);
816 * Apply config to global constants; this routine is called in single thread.
817 * @param config: to apply. Side effect: global constants change.
819 void config_apply(struct config_file* config);
822 * Find username, sets cfg_uid and cfg_gid.
823 * @param config: the config structure.
825 void config_lookup_uid(struct config_file* config);
828 * Set the given keyword to the given value.
829 * @param config: where to store config
830 * @param option: option name, including the ':' character.
831 * @param value: value, this string is copied if needed, or parsed.
832 * The caller owns the value string.
833 * @return 0 on error (malloc or syntax error).
835 int config_set_option(struct config_file* config, const char* option,
839 * Call print routine for the given option.
840 * @param cfg: config.
841 * @param opt: option name without trailing :.
842 * This is different from config_set_option.
843 * @param func: print func, called as (str, arg) for every data element.
844 * @param arg: user argument for print func.
845 * @return false if the option name is not supported (syntax error).
847 int config_get_option(struct config_file* cfg, const char* opt,
848 void (*func)(char*,void*), void* arg);
851 * Get an option and return strlist
852 * @param cfg: config file
853 * @param opt: option name.
854 * @param list: list is returned here. malloced, caller must free it.
855 * @return 0=OK, 1=syntax error, 2=malloc failed.
857 int config_get_option_list(struct config_file* cfg, const char* opt,
858 struct config_strlist** list);
861 * Get an option and collate results into string
862 * @param cfg: config file
863 * @param opt: option name.
864 * @param str: string. malloced, caller must free it.
865 * @return 0=OK, 1=syntax error, 2=malloc failed.
867 int config_get_option_collate(struct config_file* cfg, const char* opt,
871 * function to print to a file, use as func with config_get_option.
872 * @param line: text to print. \n appended.
873 * @param arg: pass a FILE*, like stdout.
875 void config_print_func(char* line, void* arg);
878 * function to collate the text strings into a strlist_head.
879 * @param line: text to append.
880 * @param arg: pass a strlist_head structure. zeroed on start.
882 void config_collate_func(char* line, void* arg);
885 * take a strlist_head list and return a malloc string. separated with newline.
886 * @param list: strlist first to collate. zeroes return "".
887 * @return NULL on malloc failure. Or if malloc failure happened in strlist.
889 char* config_collate_cat(struct config_strlist* list);
892 * Append text at end of list.
893 * @param list: list head. zeroed at start.
894 * @param item: new item. malloced by caller. if NULL the insertion fails.
895 * @return true on success.
896 * on fail the item is free()ed.
898 int cfg_strlist_append(struct config_strlist_head* list, char* item);
901 * Searches the end of a string list and appends the given text.
902 * @param head: pointer to strlist head variable.
903 * @param item: new item. malloced by caller. if NULL the insertion fails.
904 * @return true on success.
906 int cfg_strlist_append_ex(struct config_strlist** head, char* item);
909 * Find string in strlist.
910 * @param head: pointer to strlist head variable.
911 * @param item: the item to search for.
912 * @return: the element in the list when found, NULL otherwise.
914 struct config_strlist* cfg_strlist_find(struct config_strlist* head,
918 * Insert string into strlist.
919 * @param head: pointer to strlist head variable.
920 * @param item: new item. malloced by caller. If NULL the insertion fails.
921 * @return: true on success.
922 * on fail, the item is free()d.
924 int cfg_strlist_insert(struct config_strlist** head, char* item);
926 /** insert with region for allocation. */
927 int cfg_region_strlist_insert(struct regional* region,
928 struct config_strlist** head, char* item);
931 * Insert string into str2list.
932 * @param head: pointer to str2list head variable.
933 * @param item: new item. malloced by caller. If NULL the insertion fails.
934 * @param i2: 2nd string, malloced by caller. If NULL the insertion fails.
935 * @return: true on success.
936 * on fail, the item and i2 are free()d.
938 int cfg_str2list_insert(struct config_str2list** head, char* item, char* i2);
941 * Insert string into str3list.
942 * @param head: pointer to str3list head variable.
943 * @param item: new item. malloced by caller. If NULL the insertion fails.
944 * @param i2: 2nd string, malloced by caller. If NULL the insertion fails.
945 * @param i3: 3rd string, malloced by caller. If NULL the insertion fails.
946 * @return: true on success.
948 int cfg_str3list_insert(struct config_str3list** head, char* item, char* i2,
952 * Insert string into strbytelist.
953 * @param head: pointer to strbytelist head variable.
954 * @param item: new item. malloced by caller. If NULL the insertion fails.
955 * @param i2: 2nd string, malloced by caller. If NULL the insertion fails.
956 * @param i2len: length of the i2 bytestring.
957 * @return: true on success.
959 int cfg_strbytelist_insert(struct config_strbytelist** head, char* item,
960 uint8_t* i2, size_t i2len);
963 * Find stub in config list, also returns prevptr (for deletion).
964 * @param pp: call routine with pointer to a pointer to the start of the list,
965 * if the stub is found, on exit, the value contains a pointer to the
966 * next pointer that points to the found element (or to the list start
967 * pointer if it is the first element).
968 * @param nm: name of stub to find.
969 * @return: pointer to config_stub if found, or NULL if not found.
971 struct config_stub* cfg_stub_find(struct config_stub*** pp, const char* nm);
974 * Delete items in config string list.
977 void config_delstrlist(struct config_strlist* list);
980 * Delete items in config double string list.
983 void config_deldblstrlist(struct config_str2list* list);
986 * Delete items in config triple string list.
989 void config_deltrplstrlist(struct config_str3list* list);
991 /** delete string array */
992 void config_del_strarray(char** array, int num);
994 /** delete stringbytelist */
995 void config_del_strbytelist(struct config_strbytelist* list);
999 * @param p: stub item
1001 void config_delstub(struct config_stub* p);
1004 * Delete items in config stub list.
1005 * @param list: list.
1007 void config_delstubs(struct config_stub* list);
1010 * Delete an auth item
1011 * @param p: auth item
1013 void config_delauth(struct config_auth* p);
1016 * Delete items in config auth list.
1017 * @param list: list.
1019 void config_delauths(struct config_auth* list);
1022 * Delete a view item
1023 * @param p: view item
1025 void config_delview(struct config_view* p);
1028 * Delete items in config view list.
1029 * @param list: list.
1031 void config_delviews(struct config_view* list);
1033 /** check if config for remote control turns on IP-address interface
1034 * with certificates or a named pipe without certificates. */
1035 int options_remote_is_address(struct config_file* cfg);
1038 * Convert 14digit to time value
1039 * @param str: string of 14 digits
1040 * @return time value or 0 for error.
1042 time_t cfg_convert_timeval(const char* str);
1045 * Count number of values in the string.
1046 * format ::= (sp num)+ sp
1048 * sp ::= (space|tab)*
1050 * @param str: string
1051 * @return: 0 on parse error, or empty string, else
1052 * number of integer values in the string.
1054 int cfg_count_numbers(const char* str);
1057 * Convert a 'nice' memory or file size into a bytecount
1058 * From '100k' to 102400. and so on. Understands kKmMgG.
1059 * k=1024, m=1024*1024, g=1024*1024*1024.
1060 * @param str: string
1061 * @param res: result is stored here, size in bytes.
1062 * @return: true if parsed correctly, or 0 on a parse error (and an error
1065 int cfg_parse_memsize(const char* str, size_t* res);
1068 * Add a tag name to the config. It is added at the end with a new ID value.
1069 * @param cfg: the config structure.
1070 * @param tag: string (which is copied) with the name.
1071 * @return: false on alloc failure.
1073 int config_add_tag(struct config_file* cfg, const char* tag);
1076 * Find tag ID in the tag list.
1077 * @param cfg: the config structure.
1078 * @param tag: string with tag name to search for.
1079 * @return: 0..(num_tags-1) with tag ID, or -1 if tagname is not found.
1081 int find_tag_id(struct config_file* cfg, const char* tag);
1084 * parse taglist from string into bytestring with bitlist.
1085 * @param cfg: the config structure (with tagnames)
1086 * @param str: the string to parse. Parse puts 0 bytes in string.
1087 * @param listlen: returns length of in bytes.
1088 * @return malloced bytes with a bitlist of the tags. or NULL on parse error
1089 * or malloc failure.
1091 uint8_t* config_parse_taglist(struct config_file* cfg, char* str,
1095 * convert tag bitlist to a malloced string with tag names. For debug output.
1096 * @param cfg: the config structure (with tagnames)
1097 * @param taglist: the tag bitlist.
1098 * @param len: length of the tag bitlist.
1099 * @return malloced string or NULL.
1101 char* config_taglist2str(struct config_file* cfg, uint8_t* taglist,
1105 * see if two taglists intersect (have tags in common).
1106 * @param list1: first tag bitlist.
1107 * @param list1len: length in bytes of first list.
1108 * @param list2: second tag bitlist.
1109 * @param list2len: length in bytes of second list.
1110 * @return true if there are tags in common, 0 if not.
1112 int taglist_intersect(uint8_t* list1, size_t list1len, const uint8_t* list2,
1116 * Parse local-zone directive into two strings and register it in the config.
1117 * @param cfg: to put it in.
1118 * @param val: argument strings to local-zone, "example.com nodefault".
1119 * @return: false on failure
1121 int cfg_parse_local_zone(struct config_file* cfg, const char* val);
1124 * Mark "number" or "low-high" as available or not in ports array.
1125 * @param str: string in input
1126 * @param allow: give true if this range is permitted.
1127 * @param avail: the array from cfg.
1128 * @param num: size of the array (65536).
1129 * @return: true if parsed correctly, or 0 on a parse error (and an error
1132 int cfg_mark_ports(const char* str, int allow, int* avail, int num);
1135 * Get a condensed list of ports returned. allocated.
1136 * @param cfg: config file.
1137 * @param avail: the available ports array is returned here.
1138 * @return: number of ports in array or 0 on error.
1140 int cfg_condense_ports(struct config_file* cfg, int** avail);
1143 * Scan ports available
1144 * @param avail: the array from cfg.
1145 * @param num: size of the array (65536).
1146 * @return the number of ports available for use.
1148 int cfg_scan_ports(int* avail, int num);
1151 * Convert a filename to full pathname in original filesys
1152 * @param fname: the path name to convert.
1153 * Must not be null or empty.
1154 * @param cfg: config struct for chroot and chdir (if set).
1155 * @param use_chdir: if false, only chroot is applied.
1156 * @return pointer to malloced buffer which is: [chroot][chdir]fname
1157 * or NULL on malloc failure.
1159 char* fname_after_chroot(const char* fname, struct config_file* cfg,
1163 * Convert a ptr shorthand into a full reverse-notation PTR record.
1164 * @param str: input string, "IP name"
1165 * @return: malloced string "reversed-ip-name PTR name"
1167 char* cfg_ptr_reverse(char* str);
1170 * Append text to the error info for validation.
1171 * @param qstate: query state.
1172 * @param str: copied into query region and appended.
1173 * Failures to allocate are logged.
1175 void errinf(struct module_qstate* qstate, const char* str);
1178 * Append text to error info: from 1.2.3.4
1179 * @param qstate: query state.
1180 * @param origin: sock list with origin of trouble.
1181 * Every element added.
1182 * If NULL: nothing is added.
1183 * if 0len element: 'from cache' is added.
1185 void errinf_origin(struct module_qstate* qstate, struct sock_list *origin);
1188 * Append text to error info: for RRset name type class
1189 * @param qstate: query state.
1190 * @param rr: rrset_key.
1192 void errinf_rrset(struct module_qstate* qstate, struct ub_packed_rrset_key *rr);
1195 * Append text to error info: str dname
1196 * @param qstate: query state.
1197 * @param str: explanation string
1198 * @param dname: the dname.
1200 void errinf_dname(struct module_qstate* qstate, const char* str,
1204 * Create error info in string. For validation failures.
1205 * @param qstate: query state.
1206 * @return string or NULL on malloc failure (already logged).
1207 * This string is malloced and has to be freed by caller.
1209 char* errinf_to_str_bogus(struct module_qstate* qstate);
1212 * Create error info in string. For other servfails.
1213 * @param qstate: query state.
1214 * @return string or NULL on malloc failure (already logged).
1215 * This string is malloced and has to be freed by caller.
1217 char* errinf_to_str_servfail(struct module_qstate* qstate);
1220 * Used during options parsing
1222 struct config_parser_state {
1223 /** name of file being parser */
1225 /** line number in the file, starts at 1 */
1227 /** number of errors encountered */
1229 /** the result of parsing is stored here. */
1230 struct config_file* cfg;
1231 /** the current chroot dir (or NULL if none) */
1235 /** global config parser object used during config parsing */
1236 extern struct config_parser_state* cfg_parser;
1237 /** init lex state */
1238 void init_cfg_parse(void);
1240 extern FILE* ub_c_in;
1242 extern FILE* ub_c_out;
1243 /** the yacc lex generated parse function */
1244 int ub_c_parse(void);
1245 /** the lexer function */
1247 /** wrap function */
1248 int ub_c_wrap(void);
1249 /** parsing helpers: print error with file and line numbers */
1250 void ub_c_error(const char* msg);
1251 /** parsing helpers: print error with file and line numbers */
1252 void ub_c_error_msg(const char* fmt, ...) ATTR_FORMAT(printf, 1, 2);
1254 #ifdef UB_ON_WINDOWS
1256 * Obtain registry string (if it exists).
1257 * @param key: key string
1258 * @param name: name of value to fetch.
1259 * @return malloced string with the result or NULL if it did not
1260 * exist on an error (logged with log_err) was encountered.
1262 char* w_lookup_reg_str(const char* key, const char* name);
1264 /** Modify directory in options for module file name */
1265 void w_config_adjust_directory(struct config_file* cfg);
1266 #endif /* UB_ON_WINDOWS */
1268 /** debug option for unit tests. */
1269 extern int fake_dsa, fake_sha1;
1271 #endif /* UTIL_CONFIG_FILE_H */