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Editing: config_file.h
/* * util/config_file.h - reads and stores the config file for unbound. * * Copyright (c) 2007, NLnet Labs. All rights reserved. * * This software is open source. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of the NLNET LABS nor the names of its contributors may * be used to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** * \file * * This file contains functions for the config file. */ #ifndef UTIL_CONFIG_FILE_H #define UTIL_CONFIG_FILE_H struct config_stub; struct config_auth; struct config_view; struct config_strlist; struct config_str2list; struct config_str3list; struct config_strbytelist; struct module_qstate; struct sock_list; struct ub_packed_rrset_key; struct regional; /** List head for strlist processing, used for append operation. */ struct config_strlist_head { /** first in list of text items */ struct config_strlist* first; /** last in list of text items */ struct config_strlist* last; }; /** * The configuration options. * Strings are malloced. */ struct config_file { /** verbosity level as specified in the config file */ int verbosity; /** statistics interval (in seconds) */ int stat_interval; /** if false, statistics values are reset after printing them */ int stat_cumulative; /** if true, the statistics are kept in greater detail */ int stat_extended; /** number of threads to create */ int num_threads; /** port on which queries are answered. */ int port; /** do ip4 query support. */ int do_ip4; /** do ip6 query support. */ int do_ip6; /** prefer ip4 upstream queries. */ int prefer_ip4; /** prefer ip6 upstream queries. */ int prefer_ip6; /** do udp query support. */ int do_udp; /** do tcp query support. */ int do_tcp; /** tcp upstream queries (no UDP upstream queries) */ int tcp_upstream; /** udp upstream enabled when no UDP downstream is enabled (do_udp no)*/ int udp_upstream_without_downstream; /** maximum segment size of tcp socket which queries are answered */ int tcp_mss; /** maximum segment size of tcp socket for outgoing queries */ int outgoing_tcp_mss; /** tcp idle timeout, in msec */ int tcp_idle_timeout; /** do edns tcp keepalive */ int do_tcp_keepalive; /** tcp keepalive timeout, in msec */ int tcp_keepalive_timeout; /** private key file for dnstcp-ssl service (enabled if not NULL) */ char* ssl_service_key; /** public key file for dnstcp-ssl service */ char* ssl_service_pem; /** port on which to provide ssl service */ int ssl_port; /** if outgoing tcp connections use SSL */ int ssl_upstream; /** cert bundle for outgoing connections */ char* tls_cert_bundle; /** should the system certificate store get added to the cert bundle */ int tls_win_cert; /** additional tls ports */ struct config_strlist* tls_additional_port; /** secret key used to encrypt and decrypt TLS session ticket */ struct config_strlist_head tls_session_ticket_keys; /** TLS ciphers */ char* tls_ciphers; /** TLS chiphersuites (TLSv1.3) */ char* tls_ciphersuites; /** if SNI is to be used */ int tls_use_sni; /** port on which to provide DNS over HTTPS service */ int https_port; /** endpoint for HTTP service */ char* http_endpoint; /** MAX_CONCURRENT_STREAMS HTTP/2 setting */ uint32_t http_max_streams; /** maximum size of all HTTP2 query buffers combined. */ size_t http_query_buffer_size; /** maximum size of all HTTP2 response buffers combined. */ size_t http_response_buffer_size; /** set TCP_NODELAY option for http sockets */ int http_nodelay; /** Disable TLS for http sockets downstream */ int http_notls_downstream; /** outgoing port range number of ports (per thread) */ int outgoing_num_ports; /** number of outgoing tcp buffers per (per thread) */ size_t outgoing_num_tcp; /** number of incoming tcp buffers per (per thread) */ size_t incoming_num_tcp; /** allowed udp port numbers, array with 0 if not allowed */ int* outgoing_avail_ports; /** EDNS buffer size to use */ size_t edns_buffer_size; /** size of the stream wait buffers, max */ size_t stream_wait_size; /** number of bytes buffer size for DNS messages */ size_t msg_buffer_size; /** size of the message cache */ size_t msg_cache_size; /** slabs in the message cache. */ size_t msg_cache_slabs; /** number of queries every thread can service */ size_t num_queries_per_thread; /** number of msec to wait before items can be jostled out */ size_t jostle_time; /** size of the rrset cache */ size_t rrset_cache_size; /** slabs in the rrset cache */ size_t rrset_cache_slabs; /** host cache ttl in seconds */ int host_ttl; /** number of slabs in the infra host cache */ size_t infra_cache_slabs; /** max number of hosts in the infra cache */ size_t infra_cache_numhosts; /** min value for infra cache rtt */ int infra_cache_min_rtt; /** keep probing hosts that are down */ int infra_keep_probing; /** delay close of udp-timeouted ports, if 0 no delayclose. in msec */ int delay_close; /** udp_connect enable uses UDP connect to mitigate ICMP side channel */ int udp_connect; /** the target fetch policy for the iterator */ char* target_fetch_policy; /** percent*10, how many times in 1000 to pick from the fastest * destinations */ int fast_server_permil; /** number of fastest server to select from */ size_t fast_server_num; /** automatic interface for incoming messages. Uses ipv6 remapping, * and recvmsg/sendmsg ancillary data to detect interfaces, boolean */ int if_automatic; /** SO_RCVBUF size to set on port 53 UDP socket */ size_t so_rcvbuf; /** SO_SNDBUF size to set on port 53 UDP socket */ size_t so_sndbuf; /** SO_REUSEPORT requested on port 53 sockets */ int so_reuseport; /** IP_TRANSPARENT socket option requested on port 53 sockets */ int ip_transparent; /** IP_FREEBIND socket option request on port 53 sockets */ int ip_freebind; /** IP_TOS socket option requested on port 53 sockets */ int ip_dscp; /** number of interfaces to open. If 0 default all interfaces. */ int num_ifs; /** interface description strings (IP addresses) */ char **ifs; /** number of outgoing interfaces to open. * If 0 default all interfaces. */ int num_out_ifs; /** outgoing interface description strings (IP addresses) */ char **out_ifs; /** the root hints */ struct config_strlist* root_hints; /** the stub definitions, linked list */ struct config_stub* stubs; /** the forward zone definitions, linked list */ struct config_stub* forwards; /** the auth zone definitions, linked list */ struct config_auth* auths; /** the views definitions, linked list */ struct config_view* views; /** list of donotquery addresses, linked list */ struct config_strlist* donotqueryaddrs; #ifdef CLIENT_SUBNET /** list of servers we send edns-client-subnet option to and * accept option from, linked list */ struct config_strlist* client_subnet; /** list of zones we send edns-client-subnet option for */ struct config_strlist* client_subnet_zone; /** opcode assigned by IANA for edns0-client-subnet option */ uint16_t client_subnet_opcode; /** Do not check whitelist if incoming query contains an ECS record */ int client_subnet_always_forward; /** Subnet length we are willing to give up privacy for */ uint8_t max_client_subnet_ipv4; uint8_t max_client_subnet_ipv6; /** Minimum subnet length we are willing to answer */ uint8_t min_client_subnet_ipv4; uint8_t min_client_subnet_ipv6; /** Max number of nodes in the ECS radix tree */ uint32_t max_ecs_tree_size_ipv4; uint32_t max_ecs_tree_size_ipv6; #endif /** list of access control entries, linked list */ struct config_str2list* acls; /** use default localhost donotqueryaddr entries */ int donotquery_localhost; /** list of tcp connection limitss, linked list */ struct config_str2list* tcp_connection_limits; /** harden against very small edns buffer sizes */ int harden_short_bufsize; /** harden against very large query sizes */ int harden_large_queries; /** harden against spoofed glue (out of zone data) */ int harden_glue; /** harden against receiving no DNSSEC data for trust anchor */ int harden_dnssec_stripped; /** harden against queries that fall under known nxdomain names */ int harden_below_nxdomain; /** harden the referral path, query for NS,A,AAAA and validate */ int harden_referral_path; /** harden against algorithm downgrade */ int harden_algo_downgrade; /** use 0x20 bits in query as random ID bits */ int use_caps_bits_for_id; /** 0x20 whitelist, domains that do not use capsforid */ struct config_strlist* caps_whitelist; /** strip away these private addrs from answers, no DNS Rebinding */ struct config_strlist* private_address; /** allow domain (and subdomains) to use private address space */ struct config_strlist* private_domain; /** what threshold for unwanted action. */ size_t unwanted_threshold; /** the number of seconds maximal TTL used for RRsets and messages */ int max_ttl; /** the number of seconds minimum TTL used for RRsets and messages */ int min_ttl; /** the number of seconds maximal negative TTL for SOA in auth */ int max_negative_ttl; /** if prefetching of messages should be performed. */ int prefetch; /** if prefetching of DNSKEYs should be performed. */ int prefetch_key; /** deny queries of type ANY with an empty answer */ int deny_any; /** chrootdir, if not "" or chroot will be done */ char* chrootdir; /** username to change to, if not "". */ char* username; /** working directory */ char* directory; /** filename to log to. */ char* logfile; /** pidfile to write pid to. */ char* pidfile; /** should log messages be sent to syslogd */ int use_syslog; /** log timestamp in ascii UTC */ int log_time_ascii; /** log queries with one line per query */ int log_queries; /** log replies with one line per reply */ int log_replies; /** tag log_queries and log_replies for filtering */ int log_tag_queryreply; /** log every local-zone hit **/ int log_local_actions; /** log servfails with a reason */ int log_servfail; /** log identity to report */ char* log_identity; /** do not report identity (id.server, hostname.bind) */ int hide_identity; /** do not report version (version.server, version.bind) */ int hide_version; /** do not report trustanchor (trustanchor.unbound) */ int hide_trustanchor; /** identity, hostname is returned if "". */ char* identity; /** version, package version returned if "". */ char* version; /** the module configuration string */ char* module_conf; /** files with trusted DS and DNSKEYs in zonefile format, list */ struct config_strlist* trust_anchor_file_list; /** list of trustanchor keys, linked list */ struct config_strlist* trust_anchor_list; /** files with 5011 autotrust tracked keys */ struct config_strlist* auto_trust_anchor_file_list; /** files with trusted DNSKEYs in named.conf format, list */ struct config_strlist* trusted_keys_file_list; /** insecure domain list */ struct config_strlist* domain_insecure; /** send key tag query */ int trust_anchor_signaling; /** enable root key sentinel */ int root_key_sentinel; /** if not 0, this value is the validation date for RRSIGs */ int32_t val_date_override; /** the minimum for signature clock skew */ int32_t val_sig_skew_min; /** the maximum for signature clock skew */ int32_t val_sig_skew_max; /** this value sets the number of seconds before revalidating bogus */ int bogus_ttl; /** should validator clean additional section for secure msgs */ int val_clean_additional; /** log bogus messages by the validator */ int val_log_level; /** squelch val_log_level to log - this is library goes to callback */ int val_log_squelch; /** should validator allow bogus messages to go through */ int val_permissive_mode; /** use cached NSEC records to synthesise (negative) answers */ int aggressive_nsec; /** ignore the CD flag in incoming queries and refuse them bogus data */ int ignore_cd; /** serve expired entries and prefetch them */ int serve_expired; /** serve expired entries until TTL after expiration */ int serve_expired_ttl; /** reset serve expired TTL after failed update attempt */ int serve_expired_ttl_reset; /** TTL for the serve expired replies */ int serve_expired_reply_ttl; /** serve expired entries only after trying to update the entries and this * timeout (in milliseconds) is reached */ int serve_expired_client_timeout; /** nsec3 maximum iterations per key size, string */ char* val_nsec3_key_iterations; /** autotrust add holddown time, in seconds */ unsigned int add_holddown; /** autotrust del holddown time, in seconds */ unsigned int del_holddown; /** autotrust keep_missing time, in seconds. 0 is forever. */ unsigned int keep_missing; /** permit small holddown values, allowing 5011 rollover very fast */ int permit_small_holddown; /** size of the key cache */ size_t key_cache_size; /** slabs in the key cache. */ size_t key_cache_slabs; /** size of the neg cache */ size_t neg_cache_size; /** local zones config */ struct config_str2list* local_zones; /** local zones nodefault list */ struct config_strlist* local_zones_nodefault; #ifdef USE_IPSET /** local zones ipset list */ struct config_strlist* local_zones_ipset; #endif /** do not add any default local zone */ int local_zones_disable_default; /** local data RRs configured */ struct config_strlist* local_data; /** local zone override types per netblock */ struct config_str3list* local_zone_overrides; /** unblock lan zones (reverse lookups for AS112 zones) */ int unblock_lan_zones; /** insecure lan zones (don't validate AS112 zones) */ int insecure_lan_zones; /** list of zonename, tagbitlist */ struct config_strbytelist* local_zone_tags; /** list of aclname, tagbitlist */ struct config_strbytelist* acl_tags; /** list of aclname, tagname, localzonetype */ struct config_str3list* acl_tag_actions; /** list of aclname, tagname, redirectdata */ struct config_str3list* acl_tag_datas; /** list of aclname, view*/ struct config_str2list* acl_view; /** list of IP-netblock, tagbitlist */ struct config_strbytelist* respip_tags; /** list of response-driven access control entries, linked list */ struct config_str2list* respip_actions; /** RRs configured for response-driven access controls */ struct config_str2list* respip_data; /** tag list, array with tagname[i] is malloced string */ char** tagname; /** number of items in the taglist */ int num_tags; /** remote control section. enable toggle. */ int remote_control_enable; /** the interfaces the remote control should listen on */ struct config_strlist_head control_ifs; /** if the use-cert option is set */ int control_use_cert; /** port number for the control port */ int control_port; /** private key file for server */ char* server_key_file; /** certificate file for server */ char* server_cert_file; /** private key file for unbound-control */ char* control_key_file; /** certificate file for unbound-control */ char* control_cert_file; /** Python script file */ struct config_strlist* python_script; /** Dynamic library file */ struct config_strlist* dynlib_file; /** Use systemd socket activation. */ int use_systemd; /** daemonize, i.e. fork into the background. */ int do_daemonize; /* minimal response when positive answer */ int minimal_responses; /* RRSet roundrobin */ int rrset_roundrobin; /* wait time for unknown server in msec */ int unknown_server_time_limit; /* maximum UDP response size */ size_t max_udp_size; /* DNS64 prefix */ char* dns64_prefix; /* Synthetize all AAAA record despite the presence of an authoritative one */ int dns64_synthall; /** ignore AAAAs for these domain names and use A record anyway */ struct config_strlist* dns64_ignore_aaaa; /** true to enable dnstap support */ int dnstap; /** using bidirectional frame streams if true */ int dnstap_bidirectional; /** dnstap socket path */ char* dnstap_socket_path; /** dnstap IP */ char* dnstap_ip; /** dnstap TLS enable */ int dnstap_tls; /** dnstap tls server authentication name */ char* dnstap_tls_server_name; /** dnstap server cert bundle */ char* dnstap_tls_cert_bundle; /** dnstap client key for client authentication */ char* dnstap_tls_client_key_file; /** dnstap client cert for client authentication */ char* dnstap_tls_client_cert_file; /** true to send "identity" via dnstap */ int dnstap_send_identity; /** true to send "version" via dnstap */ int dnstap_send_version; /** dnstap "identity", hostname is used if "". */ char* dnstap_identity; /** dnstap "version", package version is used if "". */ char* dnstap_version; /** true to log dnstap RESOLVER_QUERY message events */ int dnstap_log_resolver_query_messages; /** true to log dnstap RESOLVER_RESPONSE message events */ int dnstap_log_resolver_response_messages; /** true to log dnstap CLIENT_QUERY message events */ int dnstap_log_client_query_messages; /** true to log dnstap CLIENT_RESPONSE message events */ int dnstap_log_client_response_messages; /** true to log dnstap FORWARDER_QUERY message events */ int dnstap_log_forwarder_query_messages; /** true to log dnstap FORWARDER_RESPONSE message events */ int dnstap_log_forwarder_response_messages; /** true to disable DNSSEC lameness check in iterator */ int disable_dnssec_lame_check; /** ratelimit for ip addresses. 0 is off, otherwise qps (unless overridden) */ int ip_ratelimit; /** number of slabs for ip_ratelimit cache */ size_t ip_ratelimit_slabs; /** memory size in bytes for ip_ratelimit cache */ size_t ip_ratelimit_size; /** ip_ratelimit factor, 0 blocks all, 10 allows 1/10 of traffic */ int ip_ratelimit_factor; /** ratelimit for domains. 0 is off, otherwise qps (unless overridden) */ int ratelimit; /** number of slabs for ratelimit cache */ size_t ratelimit_slabs; /** memory size in bytes for ratelimit cache */ size_t ratelimit_size; /** ratelimits for domain (exact match) */ struct config_str2list* ratelimit_for_domain; /** ratelimits below domain */ struct config_str2list* ratelimit_below_domain; /** ratelimit factor, 0 blocks all, 10 allows 1/10 of traffic */ int ratelimit_factor; /** minimise outgoing QNAME and hide original QTYPE if possible */ int qname_minimisation; /** minimise QNAME in strict mode, minimise according to RFC. * Do not apply fallback */ int qname_minimisation_strict; /** SHM data - true if shm is enabled */ int shm_enable; /** SHM data - key for the shm */ int shm_key; /** list of EDNS client string entries, linked list */ struct config_str2list* edns_client_strings; /** EDNS opcode to use for EDNS client strings */ uint16_t edns_client_string_opcode; /** DNSCrypt */ /** true to enable dnscrypt */ int dnscrypt; /** port on which to provide dnscrypt service */ int dnscrypt_port; /** provider name 2.dnscrypt-cert.example.com */ char* dnscrypt_provider; /** dnscrypt secret keys 1.key */ struct config_strlist* dnscrypt_secret_key; /** dnscrypt provider certs 1.cert */ struct config_strlist* dnscrypt_provider_cert; /** dnscrypt provider certs 1.cert which have been rotated and should not be * advertised through DNS's providername TXT record but are required to be * able to handle existing traffic using the old cert. */ struct config_strlist* dnscrypt_provider_cert_rotated; /** memory size in bytes for dnscrypt shared secrets cache */ size_t dnscrypt_shared_secret_cache_size; /** number of slabs for dnscrypt shared secrets cache */ size_t dnscrypt_shared_secret_cache_slabs; /** memory size in bytes for dnscrypt nonces cache */ size_t dnscrypt_nonce_cache_size; /** number of slabs for dnscrypt nonces cache */ size_t dnscrypt_nonce_cache_slabs; /** IPsec module */ #ifdef USE_IPSECMOD /** false to bypass the IPsec module */ int ipsecmod_enabled; /** whitelisted domains for ipsecmod */ struct config_strlist* ipsecmod_whitelist; /** path to external hook */ char* ipsecmod_hook; /** true to proceed even with a bogus IPSECKEY */ int ipsecmod_ignore_bogus; /** max TTL for the A/AAAA records that call the hook */ int ipsecmod_max_ttl; /** false to proceed even when ipsecmod_hook fails */ int ipsecmod_strict; #endif /* cachedb module */ #ifdef USE_CACHEDB /** backend DB name */ char* cachedb_backend; /** secret seed for hash key calculation */ char* cachedb_secret; #ifdef USE_REDIS /** redis server's IP address or host name */ char* redis_server_host; /** redis server's TCP port */ int redis_server_port; /** timeout (in ms) for communication with the redis server */ int redis_timeout; /** set timeout on redis records based on DNS response ttl */ int redis_expire_records; #endif #endif /* ipset module */ #ifdef USE_IPSET char* ipset_name_v4; char* ipset_name_v6; #endif }; /** from cfg username, after daemonize setup performed */ extern uid_t cfg_uid; /** from cfg username, after daemonize setup performed */ extern gid_t cfg_gid; /** debug and enable small timeouts */ extern int autr_permit_small_holddown; /** size (in bytes) of stream wait buffers max */ extern size_t stream_wait_max; /** size (in bytes) of all total HTTP2 query buffers max */ extern size_t http2_query_buffer_max; /** size (in bytes) of all total HTTP2 response buffers max */ extern size_t http2_response_buffer_max; /** * Stub config options */ struct config_stub { /** next in list */ struct config_stub* next; /** domain name (in text) of the stub apex domain */ char* name; /** list of stub nameserver hosts (domain name) */ struct config_strlist* hosts; /** list of stub nameserver addresses (IP address) */ struct config_strlist* addrs; /** if stub-prime is set */ int isprime; /** if forward-first is set (failover to without if fails) */ int isfirst; /** use SSL for queries to this stub */ int ssl_upstream; /*** no cache */ int no_cache; }; /** * Auth config options */ struct config_auth { /** next in list */ struct config_auth* next; /** domain name (in text) of the auth apex domain */ char* name; /** list of masters */ struct config_strlist* masters; /** list of urls */ struct config_strlist* urls; /** list of allow-notify */ struct config_strlist* allow_notify; /** zonefile (or NULL) */ char* zonefile; /** provide downstream answers */ int for_downstream; /** provide upstream answers */ int for_upstream; /** fallback to recursion to authorities if zone expired and other * reasons perhaps (like, query bogus) */ int fallback_enabled; /** this zone is used to create local-zone policies */ int isrpz; /** rpz tags (or NULL) */ uint8_t* rpz_taglist; /** length of the taglist (in bytes) */ size_t rpz_taglistlen; /** Override RPZ action for this zone, regardless of zone content */ char* rpz_action_override; /** Log when this RPZ policy is applied */ int rpz_log; /** Display this name in the log when RPZ policy is applied */ char* rpz_log_name; /** Always reply with this CNAME target if the cname override action is * used */ char* rpz_cname; }; /** * View config options */ struct config_view { /** next in list */ struct config_view* next; /** view name */ char* name; /** local zones */ struct config_str2list* local_zones; /** local data RRs */ struct config_strlist* local_data; /** local zones nodefault list */ struct config_strlist* local_zones_nodefault; #ifdef USE_IPSET /** local zones ipset list */ struct config_strlist* local_zones_ipset; #endif /** Fallback to global local_zones when there is no match in the view * view specific tree. 1 for yes, 0 for no */ int isfirst; /** predefined actions for particular IP address responses */ struct config_str2list* respip_actions; /** data complementing the 'redirect' response IP actions */ struct config_str2list* respip_data; }; /** * List of strings for config options */ struct config_strlist { /** next item in list */ struct config_strlist* next; /** config option string */ char* str; }; /** * List of two strings for config options */ struct config_str2list { /** next item in list */ struct config_str2list* next; /** first string */ char* str; /** second string */ char* str2; }; /** * List of three strings for config options */ struct config_str3list { /** next item in list */ struct config_str3list* next; /** first string */ char* str; /** second string */ char* str2; /** third string */ char* str3; }; /** * List of string, bytestring for config options */ struct config_strbytelist { /** next item in list */ struct config_strbytelist* next; /** first string */ char* str; /** second bytestring */ uint8_t* str2; size_t str2len; }; /** * Create config file structure. Filled with default values. * @return: the new structure or NULL on memory error. */ struct config_file* config_create(void); /** * Create config file structure for library use. Filled with default values. * @return: the new structure or NULL on memory error. */ struct config_file* config_create_forlib(void); /** * Read the config file from the specified filename. * @param config: where options are stored into, must be freshly created. * @param filename: name of configfile. If NULL nothing is done. * @param chroot: if not NULL, the chroot dir currently in use (for include). * @return: false on error. In that case errno is set, ENOENT means * file not found. */ int config_read(struct config_file* config, const char* filename, const char* chroot); /** * Destroy the config file structure. * @param config: to delete. */ void config_delete(struct config_file* config); /** * Apply config to global constants; this routine is called in single thread. * @param config: to apply. Side effect: global constants change. */ void config_apply(struct config_file* config); /** * Find username, sets cfg_uid and cfg_gid. * @param config: the config structure. */ void config_lookup_uid(struct config_file* config); /** * Set the given keyword to the given value. * @param config: where to store config * @param option: option name, including the ':' character. * @param value: value, this string is copied if needed, or parsed. * The caller owns the value string. * @return 0 on error (malloc or syntax error). */ int config_set_option(struct config_file* config, const char* option, const char* value); /** * Call print routine for the given option. * @param cfg: config. * @param opt: option name without trailing :. * This is different from config_set_option. * @param func: print func, called as (str, arg) for every data element. * @param arg: user argument for print func. * @return false if the option name is not supported (syntax error). */ int config_get_option(struct config_file* cfg, const char* opt, void (*func)(char*,void*), void* arg); /** * Get an option and return strlist * @param cfg: config file * @param opt: option name. * @param list: list is returned here. malloced, caller must free it. * @return 0=OK, 1=syntax error, 2=malloc failed. */ int config_get_option_list(struct config_file* cfg, const char* opt, struct config_strlist** list); /** * Get an option and collate results into string * @param cfg: config file * @param opt: option name. * @param str: string. malloced, caller must free it. * @return 0=OK, 1=syntax error, 2=malloc failed. */ int config_get_option_collate(struct config_file* cfg, const char* opt, char** str); /** * function to print to a file, use as func with config_get_option. * @param line: text to print. \n appended. * @param arg: pass a FILE*, like stdout. */ void config_print_func(char* line, void* arg); /** * function to collate the text strings into a strlist_head. * @param line: text to append. * @param arg: pass a strlist_head structure. zeroed on start. */ void config_collate_func(char* line, void* arg); /** * take a strlist_head list and return a malloc string. separated with newline. * @param list: strlist first to collate. zeroes return "". * @return NULL on malloc failure. Or if malloc failure happened in strlist. */ char* config_collate_cat(struct config_strlist* list); /** * Append text at end of list. * @param list: list head. zeroed at start. * @param item: new item. malloced by caller. if NULL the insertion fails. * @return true on success. * on fail the item is free()ed. */ int cfg_strlist_append(struct config_strlist_head* list, char* item); /** * Searches the end of a string list and appends the given text. * @param head: pointer to strlist head variable. * @param item: new item. malloced by caller. if NULL the insertion fails. * @return true on success. */ int cfg_strlist_append_ex(struct config_strlist** head, char* item); /** * Find string in strlist. * @param head: pointer to strlist head variable. * @param item: the item to search for. * @return: the element in the list when found, NULL otherwise. */ struct config_strlist* cfg_strlist_find(struct config_strlist* head, const char* item); /** * Insert string into strlist. * @param head: pointer to strlist head variable. * @param item: new item. malloced by caller. If NULL the insertion fails. * @return: true on success. * on fail, the item is free()d. */ int cfg_strlist_insert(struct config_strlist** head, char* item); /** insert with region for allocation. */ int cfg_region_strlist_insert(struct regional* region, struct config_strlist** head, char* item); /** * Insert string into str2list. * @param head: pointer to str2list head variable. * @param item: new item. malloced by caller. If NULL the insertion fails. * @param i2: 2nd string, malloced by caller. If NULL the insertion fails. * @return: true on success. * on fail, the item and i2 are free()d. */ int cfg_str2list_insert(struct config_str2list** head, char* item, char* i2); /** * Insert string into str3list. * @param head: pointer to str3list head variable. * @param item: new item. malloced by caller. If NULL the insertion fails. * @param i2: 2nd string, malloced by caller. If NULL the insertion fails. * @param i3: 3rd string, malloced by caller. If NULL the insertion fails. * @return: true on success. */ int cfg_str3list_insert(struct config_str3list** head, char* item, char* i2, char* i3); /** * Insert string into strbytelist. * @param head: pointer to strbytelist head variable. * @param item: new item. malloced by caller. If NULL the insertion fails. * @param i2: 2nd string, malloced by caller. If NULL the insertion fails. * @param i2len: length of the i2 bytestring. * @return: true on success. */ int cfg_strbytelist_insert(struct config_strbytelist** head, char* item, uint8_t* i2, size_t i2len); /** * Find stub in config list, also returns prevptr (for deletion). * @param pp: call routine with pointer to a pointer to the start of the list, * if the stub is found, on exit, the value contains a pointer to the * next pointer that points to the found element (or to the list start * pointer if it is the first element). * @param nm: name of stub to find. * @return: pointer to config_stub if found, or NULL if not found. */ struct config_stub* cfg_stub_find(struct config_stub*** pp, const char* nm); /** * Delete items in config string list. * @param list: list. */ void config_delstrlist(struct config_strlist* list); /** * Delete items in config double string list. * @param list: list. */ void config_deldblstrlist(struct config_str2list* list); /** * Delete items in config triple string list. * @param list: list. */ void config_deltrplstrlist(struct config_str3list* list); /** delete string array */ void config_del_strarray(char** array, int num); /** delete stringbytelist */ void config_del_strbytelist(struct config_strbytelist* list); /** * Delete a stub item * @param p: stub item */ void config_delstub(struct config_stub* p); /** * Delete items in config stub list. * @param list: list. */ void config_delstubs(struct config_stub* list); /** * Delete an auth item * @param p: auth item */ void config_delauth(struct config_auth* p); /** * Delete items in config auth list. * @param list: list. */ void config_delauths(struct config_auth* list); /** * Delete a view item * @param p: view item */ void config_delview(struct config_view* p); /** * Delete items in config view list. * @param list: list. */ void config_delviews(struct config_view* list); /** check if config for remote control turns on IP-address interface * with certificates or a named pipe without certificates. */ int options_remote_is_address(struct config_file* cfg); /** * Convert 14digit to time value * @param str: string of 14 digits * @return time value or 0 for error. */ time_t cfg_convert_timeval(const char* str); /** * Count number of values in the string. * format ::= (sp num)+ sp * num ::= [-](0-9)+ * sp ::= (space|tab)* * * @param str: string * @return: 0 on parse error, or empty string, else * number of integer values in the string. */ int cfg_count_numbers(const char* str); /** * Convert a 'nice' memory or file size into a bytecount * From '100k' to 102400. and so on. Understands kKmMgG. * k=1024, m=1024*1024, g=1024*1024*1024. * @param str: string * @param res: result is stored here, size in bytes. * @return: true if parsed correctly, or 0 on a parse error (and an error * is logged). */ int cfg_parse_memsize(const char* str, size_t* res); /** * Add a tag name to the config. It is added at the end with a new ID value. * @param cfg: the config structure. * @param tag: string (which is copied) with the name. * @return: false on alloc failure. */ int config_add_tag(struct config_file* cfg, const char* tag); /** * Find tag ID in the tag list. * @param cfg: the config structure. * @param tag: string with tag name to search for. * @return: 0..(num_tags-1) with tag ID, or -1 if tagname is not found. */ int find_tag_id(struct config_file* cfg, const char* tag); /** * parse taglist from string into bytestring with bitlist. * @param cfg: the config structure (with tagnames) * @param str: the string to parse. Parse puts 0 bytes in string. * @param listlen: returns length of in bytes. * @return malloced bytes with a bitlist of the tags. or NULL on parse error * or malloc failure. */ uint8_t* config_parse_taglist(struct config_file* cfg, char* str, size_t* listlen); /** * convert tag bitlist to a malloced string with tag names. For debug output. * @param cfg: the config structure (with tagnames) * @param taglist: the tag bitlist. * @param len: length of the tag bitlist. * @return malloced string or NULL. */ char* config_taglist2str(struct config_file* cfg, uint8_t* taglist, size_t len); /** * see if two taglists intersect (have tags in common). * @param list1: first tag bitlist. * @param list1len: length in bytes of first list. * @param list2: second tag bitlist. * @param list2len: length in bytes of second list. * @return true if there are tags in common, 0 if not. */ int taglist_intersect(uint8_t* list1, size_t list1len, const uint8_t* list2, size_t list2len); /** * Parse local-zone directive into two strings and register it in the config. * @param cfg: to put it in. * @param val: argument strings to local-zone, "example.com nodefault". * @return: false on failure */ int cfg_parse_local_zone(struct config_file* cfg, const char* val); /** * Mark "number" or "low-high" as available or not in ports array. * @param str: string in input * @param allow: give true if this range is permitted. * @param avail: the array from cfg. * @param num: size of the array (65536). * @return: true if parsed correctly, or 0 on a parse error (and an error * is logged). */ int cfg_mark_ports(const char* str, int allow, int* avail, int num); /** * Get a condensed list of ports returned. allocated. * @param cfg: config file. * @param avail: the available ports array is returned here. * @return: number of ports in array or 0 on error. */ int cfg_condense_ports(struct config_file* cfg, int** avail); /** * Scan ports available * @param avail: the array from cfg. * @param num: size of the array (65536). * @return the number of ports available for use. */ int cfg_scan_ports(int* avail, int num); /** * Convert a filename to full pathname in original filesys * @param fname: the path name to convert. * Must not be null or empty. * @param cfg: config struct for chroot and chdir (if set). * @param use_chdir: if false, only chroot is applied. * @return pointer to malloced buffer which is: [chroot][chdir]fname * or NULL on malloc failure. */ char* fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir); /** * Convert a ptr shorthand into a full reverse-notation PTR record. * @param str: input string, "IP name" * @return: malloced string "reversed-ip-name PTR name" */ char* cfg_ptr_reverse(char* str); /** * Append text to the error info for validation. * @param qstate: query state. * @param str: copied into query region and appended. * Failures to allocate are logged. */ void errinf(struct module_qstate* qstate, const char* str); /** * Append text to error info: from 1.2.3.4 * @param qstate: query state. * @param origin: sock list with origin of trouble. * Every element added. * If NULL: nothing is added. * if 0len element: 'from cache' is added. */ void errinf_origin(struct module_qstate* qstate, struct sock_list *origin); /** * Append text to error info: for RRset name type class * @param qstate: query state. * @param rr: rrset_key. */ void errinf_rrset(struct module_qstate* qstate, struct ub_packed_rrset_key *rr); /** * Append text to error info: str dname * @param qstate: query state. * @param str: explanation string * @param dname: the dname. */ void errinf_dname(struct module_qstate* qstate, const char* str, uint8_t* dname); /** * Create error info in string. For validation failures. * @param qstate: query state. * @return string or NULL on malloc failure (already logged). * This string is malloced and has to be freed by caller. */ char* errinf_to_str_bogus(struct module_qstate* qstate); /** * Create error info in string. For other servfails. * @param qstate: query state. * @return string or NULL on malloc failure (already logged). * This string is malloced and has to be freed by caller. */ char* errinf_to_str_servfail(struct module_qstate* qstate); /** * Used during options parsing */ struct config_parser_state { /** name of file being parser */ char* filename; /** line number in the file, starts at 1 */ int line; /** number of errors encountered */ int errors; /** the result of parsing is stored here. */ struct config_file* cfg; /** the current chroot dir (or NULL if none) */ const char* chroot; }; /** global config parser object used during config parsing */ extern struct config_parser_state* cfg_parser; /** init lex state */ void init_cfg_parse(void); /** lex in file */ extern FILE* ub_c_in; /** lex out file */ extern FILE* ub_c_out; /** the yacc lex generated parse function */ int ub_c_parse(void); /** the lexer function */ int ub_c_lex(void); /** wrap function */ int ub_c_wrap(void); /** parsing helpers: print error with file and line numbers */ void ub_c_error(const char* msg); /** parsing helpers: print error with file and line numbers */ void ub_c_error_msg(const char* fmt, ...) ATTR_FORMAT(printf, 1, 2); #ifdef UB_ON_WINDOWS /** * Obtain registry string (if it exists). * @param key: key string * @param name: name of value to fetch. * @return malloced string with the result or NULL if it did not * exist on an error (logged with log_err) was encountered. */ char* w_lookup_reg_str(const char* key, const char* name); /** Modify directory in options for module file name */ void w_config_adjust_directory(struct config_file* cfg); #endif /* UB_ON_WINDOWS */ /** debug option for unit tests. */ extern int fake_dsa, fake_sha1; #endif /* UTIL_CONFIG_FILE_H */
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