/*
* 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
#include "sldns/rrdef.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;
/** if true, inhibits a lot of =0 lines from the extended stats output */
int stat_inhibit_zero;
/** 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;
/** max number of queries on a reuse connection. */
size_t max_reuse_tcp_queries;
/** timeout for REUSE entries in milliseconds. */
int tcp_reuse_timeout;
/** timeout in milliseconds for TCP queries to auth servers. */
int tcp_auth_query_timeout;
/** 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;
/** proxy protocol ports */
struct config_strlist* proxy_protocol_port;
/** 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 (min retransmit timeout) */
int infra_cache_min_rtt;
/** max value for infra cache rtt (max retransmit timeout) */
int infra_cache_max_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;
/** extra ports to open if if_automatic enabled, or NULL for default */
char* if_automatic_ports;
/** 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;
/** do not report the User-Agent HTTP header */
int hide_http_user_agent;
/** identity, hostname is returned if "". */
char* identity;
/** version, package version returned if "". */
char* version;
/** User-Agent for HTTP header */
char* http_user_agent;
/** nsid */
char *nsid_cfg_str;
uint8_t *nsid;
uint16_t nsid_len;
/** 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;
/** max number of query restarts, number of IPs to probe */
int32_t val_max_restart;
/** 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;
/** serve EDE code 3 - Stale Answer (RFC8914) for expired entries */
int ede_serve_expired;
/** serve original TTLs rather than decrementing ones */
int serve_original_ttl;
/** nsec3 maximum iterations per key size, string */
char* val_nsec3_key_iterations;
/** if zonemd failures are permitted, only logged */
int zonemd_permissive_mode;
/** 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 interface action entries, linked list */
struct config_str2list* interface_actions;
/** list of interface, tagbitlist */
struct config_strbytelist* interface_tags;
/** list of interface, tagname, localzonetype */
struct config_str3list* interface_tag_actions;
/** list of interface, tagname, redirectdata */
struct config_str3list* interface_tag_datas;
/** list of interface, view*/
struct config_str2list* interface_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 backoff, when on, if the limit is reached it is
* considered an attack and it backs off until 'demand' decreases over
* the RATE_WINDOW. */
int ip_ratelimit_backoff;
/** 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;
/** ratelimit backoff, when on, if the limit is reached it is
* considered an attack and it backs off until 'demand' decreases over
* the RATE_WINDOW. */
int ratelimit_backoff;
/** number of retries on outgoing queries */
int outbound_msg_retry;
/** max sent queries per qstate; resets on query restarts (e.g.,
* CNAMES) and referrals */
int max_sent_count;
/** max number of query restarts; determines max length of CNAME chain */
int max_query_restarts;
/** 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;
/** EDNS padding according to RFC7830 and RFC8467 */
/** true to enable padding of responses (default: on) */
int pad_responses;
/** block size with which to pad encrypted responses (default: 468) */
size_t pad_responses_block_size;
/** true to enable padding of queries (default: on) */
int pad_queries;
/** block size with which to pad encrypted queries (default: 128) */
size_t pad_queries_block_size;
/** 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
/** respond with Extended DNS Errors (RFC8914) */
int ede;
};
/** 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 tcp for queries to this stub */
int tcp_upstream;
/** 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;
/** signal nxdomain block with unset RA */
int rpz_signal_nxdomain_ra;
/** Check ZONEMD records for this zone */
int zonemd_check;
/** Reject absence of ZONEMD records, zone must have one */
int zonemd_reject_absence;
};
/**
* 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);
/**
* Parse nsid from string into binary nsid. nsid is either a hexadecimal
* string or an ascii string prepended with ascii_ in which case the
* characters after ascii_ are simply copied.
* @param str: the string to parse.
* @param nsid_len: returns length of nsid in bytes.
* @return malloced bytes or NULL on parse error or malloc failure.
*/
uint8_t* cfg_parse_nsid(const char* str, uint16_t* nsid_len);
/**
* 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);
/**
* Apply system specific port range policy.
* @param cfg: config file.
* @param num: size of the array (65536).
*/
void cfg_apply_local_port_policy(struct config_file* cfg, int num);
/**
* 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);
/**
* 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;
/** if we are started in a toplevel, or not, after a force_toplevel */
int started_toplevel;
};
/** 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;
/** see if interface is https, its port number == the https port number */
int if_is_https(const char* ifname, const char* port, int https_port);
/**
* Return true if the config contains settings that enable https.
* @param cfg: config information.
* @return true if https ports are used for server.
*/
int cfg_has_https(struct config_file* cfg);
/** see if interface is PROXYv2, its port number == the proxy port number */
int if_is_pp2(const char* ifname, const char* port,
struct config_strlist* proxy_protocol_port);
/** see if interface is DNSCRYPT, its port number == the dnscrypt port number */
int if_is_dnscrypt(const char* ifname, const char* port, int dnscrypt_port);
#ifdef USE_LINUX_IP_LOCAL_PORT_RANGE
#define LINUX_IP_LOCAL_PORT_RANGE_PATH "/proc/sys/net/ipv4/ip_local_port_range"
#endif
#endif /* UTIL_CONFIG_FILE_H */