/* * util/config_file.c - 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. */ #include "config.h" #include #include #ifdef HAVE_TIME_H #include #endif #include "util/log.h" #include "util/configyyrename.h" #include "util/config_file.h" #include "util/configparser.h" #include "util/net_help.h" #include "util/data/msgparse.h" #include "util/module.h" #include "util/regional.h" #include "util/fptr_wlist.h" #include "util/data/dname.h" #include "util/rtt.h" #include "services/cache/infra.h" #include "sldns/wire2str.h" #include "sldns/parseutil.h" #include "iterator/iterator.h" #ifdef HAVE_GLOB_H # include #endif #ifdef CLIENT_SUBNET #include "edns-subnet/edns-subnet.h" #endif #ifdef HAVE_PWD_H #include #endif /** from cfg username, after daemonize setup performed */ uid_t cfg_uid = (uid_t)-1; /** from cfg username, after daemonize setup performed */ gid_t cfg_gid = (gid_t)-1; /** for debug allow small timeout values for fast rollovers */ int autr_permit_small_holddown = 0; /** size (in bytes) of stream wait buffers max */ size_t stream_wait_max = 4 * 1024 * 1024; /** global config during parsing */ struct config_parser_state* cfg_parser = 0; /** init ports possible for use */ static void init_outgoing_availports(int* array, int num); struct config_file* config_create(void) { struct config_file* cfg; cfg = (struct config_file*)calloc(1, sizeof(struct config_file)); if(!cfg) return NULL; /* the defaults if no config is present */ cfg->verbosity = 1; cfg->stat_interval = 0; cfg->stat_cumulative = 0; cfg->stat_extended = 0; cfg->num_threads = 1; cfg->port = UNBOUND_DNS_PORT; cfg->do_ip4 = 1; cfg->do_ip6 = 1; cfg->do_udp = 1; cfg->do_tcp = 1; cfg->tcp_upstream = 0; cfg->udp_upstream_without_downstream = 0; cfg->tcp_mss = 0; cfg->outgoing_tcp_mss = 0; cfg->tcp_idle_timeout = 30 * 1000; /* 30s in millisecs */ cfg->do_tcp_keepalive = 0; cfg->tcp_keepalive_timeout = 120 * 1000; /* 120s in millisecs */ cfg->ssl_service_key = NULL; cfg->ssl_service_pem = NULL; cfg->ssl_port = UNBOUND_DNS_OVER_TLS_PORT; cfg->ssl_upstream = 0; cfg->tls_cert_bundle = NULL; cfg->tls_win_cert = 0; cfg->use_syslog = 1; cfg->log_identity = NULL; /* changed later with argv[0] */ cfg->log_time_ascii = 0; cfg->log_queries = 0; cfg->log_replies = 0; cfg->log_tag_queryreply = 0; cfg->log_local_actions = 0; cfg->log_servfail = 0; #ifndef USE_WINSOCK # ifdef USE_MINI_EVENT /* select max 1024 sockets */ cfg->outgoing_num_ports = 960; cfg->num_queries_per_thread = 512; # else /* libevent can use many sockets */ cfg->outgoing_num_ports = 4096; cfg->num_queries_per_thread = 1024; # endif cfg->outgoing_num_tcp = 10; cfg->incoming_num_tcp = 10; #else cfg->outgoing_num_ports = 48; /* windows is limited in num fds */ cfg->num_queries_per_thread = 24; cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */ cfg->incoming_num_tcp = 2; #endif cfg->stream_wait_size = 4 * 1024 * 1024; cfg->edns_buffer_size = 4096; /* 4k from rfc recommendation */ cfg->msg_buffer_size = 65552; /* 64 k + a small margin */ cfg->msg_cache_size = 4 * 1024 * 1024; cfg->msg_cache_slabs = 4; cfg->jostle_time = 200; cfg->rrset_cache_size = 4 * 1024 * 1024; cfg->rrset_cache_slabs = 4; cfg->host_ttl = 900; cfg->bogus_ttl = 60; cfg->min_ttl = 0; cfg->max_ttl = 3600 * 24; cfg->max_negative_ttl = 3600; cfg->prefetch = 0; cfg->prefetch_key = 0; cfg->deny_any = 0; cfg->infra_cache_slabs = 4; cfg->infra_cache_numhosts = 10000; cfg->infra_cache_min_rtt = 50; cfg->delay_close = 0; if(!(cfg->outgoing_avail_ports = (int*)calloc(65536, sizeof(int)))) goto error_exit; init_outgoing_availports(cfg->outgoing_avail_ports, 65536); if(!(cfg->username = strdup(UB_USERNAME))) goto error_exit; #ifdef HAVE_CHROOT if(!(cfg->chrootdir = strdup(CHROOT_DIR))) goto error_exit; #endif if(!(cfg->directory = strdup(RUN_DIR))) goto error_exit; if(!(cfg->logfile = strdup(""))) goto error_exit; if(!(cfg->pidfile = strdup(PIDFILE))) goto error_exit; if(!(cfg->target_fetch_policy = strdup("3 2 1 0 0"))) goto error_exit; cfg->fast_server_permil = 0; cfg->fast_server_num = 3; cfg->donotqueryaddrs = NULL; cfg->donotquery_localhost = 1; cfg->root_hints = NULL; cfg->use_systemd = 0; cfg->do_daemonize = 1; cfg->if_automatic = 0; cfg->so_rcvbuf = 0; cfg->so_sndbuf = 0; cfg->so_reuseport = REUSEPORT_DEFAULT; cfg->ip_transparent = 0; cfg->ip_freebind = 0; cfg->num_ifs = 0; cfg->ifs = NULL; cfg->num_out_ifs = 0; cfg->out_ifs = NULL; cfg->stubs = NULL; cfg->forwards = NULL; cfg->auths = NULL; #ifdef CLIENT_SUBNET cfg->client_subnet = NULL; cfg->client_subnet_zone = NULL; cfg->client_subnet_opcode = LDNS_EDNS_CLIENT_SUBNET; cfg->client_subnet_always_forward = 0; cfg->max_client_subnet_ipv4 = 24; cfg->max_client_subnet_ipv6 = 56; cfg->min_client_subnet_ipv4 = 0; cfg->min_client_subnet_ipv6 = 0; cfg->max_ecs_tree_size_ipv4 = 100; cfg->max_ecs_tree_size_ipv6 = 100; #endif cfg->views = NULL; cfg->acls = NULL; cfg->tcp_connection_limits = NULL; cfg->harden_short_bufsize = 0; cfg->harden_large_queries = 0; cfg->harden_glue = 1; cfg->harden_dnssec_stripped = 1; cfg->harden_below_nxdomain = 1; cfg->harden_referral_path = 0; cfg->harden_algo_downgrade = 0; cfg->use_caps_bits_for_id = 0; cfg->caps_whitelist = NULL; cfg->private_address = NULL; cfg->private_domain = NULL; cfg->unwanted_threshold = 0; cfg->hide_identity = 0; cfg->hide_version = 0; cfg->hide_trustanchor = 0; cfg->identity = NULL; cfg->version = NULL; cfg->auto_trust_anchor_file_list = NULL; cfg->trust_anchor_file_list = NULL; cfg->trust_anchor_list = NULL; cfg->trusted_keys_file_list = NULL; cfg->trust_anchor_signaling = 1; cfg->root_key_sentinel = 1; cfg->dlv_anchor_file = NULL; cfg->dlv_anchor_list = NULL; cfg->domain_insecure = NULL; cfg->val_date_override = 0; cfg->val_sig_skew_min = 3600; /* at least daylight savings trouble */ cfg->val_sig_skew_max = 86400; /* at most timezone settings trouble */ cfg->val_clean_additional = 1; cfg->val_log_level = 0; cfg->val_log_squelch = 0; cfg->val_permissive_mode = 0; cfg->aggressive_nsec = 0; cfg->ignore_cd = 0; cfg->serve_expired = 0; cfg->serve_expired_ttl = 0; cfg->serve_expired_ttl_reset = 0; cfg->add_holddown = 30*24*3600; cfg->del_holddown = 30*24*3600; cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */ cfg->permit_small_holddown = 0; cfg->key_cache_size = 4 * 1024 * 1024; cfg->key_cache_slabs = 4; cfg->neg_cache_size = 1 * 1024 * 1024; cfg->local_zones = NULL; cfg->local_zones_nodefault = NULL; #ifdef USE_IPSET cfg->local_zones_ipset = NULL; #endif cfg->local_zones_disable_default = 0; cfg->local_data = NULL; cfg->local_zone_overrides = NULL; cfg->unblock_lan_zones = 0; cfg->insecure_lan_zones = 0; cfg->python_script = NULL; cfg->remote_control_enable = 0; cfg->control_ifs.first = NULL; cfg->control_ifs.last = NULL; cfg->control_port = UNBOUND_CONTROL_PORT; cfg->control_use_cert = 1; cfg->minimal_responses = 1; cfg->rrset_roundrobin = 0; cfg->unknown_server_time_limit = 376; cfg->max_udp_size = 4096; if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key"))) goto error_exit; if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem"))) goto error_exit; if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key"))) goto error_exit; if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem"))) goto error_exit; #ifdef CLIENT_SUBNET if(!(cfg->module_conf = strdup("subnetcache validator iterator"))) goto error_exit; #else if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit; #endif if(!(cfg->val_nsec3_key_iterations = strdup("1024 150 2048 500 4096 2500"))) goto error_exit; #if defined(DNSTAP_SOCKET_PATH) if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH))) goto error_exit; #endif cfg->disable_dnssec_lame_check = 0; cfg->ip_ratelimit = 0; cfg->ratelimit = 0; cfg->ip_ratelimit_slabs = 4; cfg->ratelimit_slabs = 4; cfg->ip_ratelimit_size = 4*1024*1024; cfg->ratelimit_size = 4*1024*1024; cfg->ratelimit_for_domain = NULL; cfg->ratelimit_below_domain = NULL; cfg->ip_ratelimit_factor = 10; cfg->ratelimit_factor = 10; cfg->qname_minimisation = 1; cfg->qname_minimisation_strict = 0; cfg->shm_enable = 0; cfg->shm_key = 11777; cfg->dnscrypt = 0; cfg->dnscrypt_port = 0; cfg->dnscrypt_provider = NULL; cfg->dnscrypt_provider_cert = NULL; cfg->dnscrypt_provider_cert_rotated = NULL; cfg->dnscrypt_secret_key = NULL; cfg->dnscrypt_shared_secret_cache_size = 4*1024*1024; cfg->dnscrypt_shared_secret_cache_slabs = 4; cfg->dnscrypt_nonce_cache_size = 4*1024*1024; cfg->dnscrypt_nonce_cache_slabs = 4; #ifdef USE_IPSECMOD cfg->ipsecmod_enabled = 1; cfg->ipsecmod_ignore_bogus = 0; cfg->ipsecmod_hook = NULL; cfg->ipsecmod_max_ttl = 3600; cfg->ipsecmod_whitelist = NULL; cfg->ipsecmod_strict = 0; #endif #ifdef USE_CACHEDB cfg->cachedb_backend = NULL; cfg->cachedb_secret = NULL; #endif #ifdef USE_IPSET cfg->ipset_name_v4 = NULL; cfg->ipset_name_v6 = NULL; #endif return cfg; error_exit: config_delete(cfg); return NULL; } struct config_file* config_create_forlib(void) { struct config_file* cfg = config_create(); if(!cfg) return NULL; /* modifications for library use, less verbose, less memory */ free(cfg->chrootdir); cfg->chrootdir = NULL; cfg->verbosity = 0; cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable' and probably within the ulimit(maxfds) of the user */ cfg->outgoing_num_tcp = 2; cfg->msg_cache_size = 1024*1024; cfg->msg_cache_slabs = 1; cfg->rrset_cache_size = 1024*1024; cfg->rrset_cache_slabs = 1; cfg->infra_cache_slabs = 1; cfg->use_syslog = 0; cfg->key_cache_size = 1024*1024; cfg->key_cache_slabs = 1; cfg->neg_cache_size = 100 * 1024; cfg->donotquery_localhost = 0; /* allow, so that you can ask a forward nameserver running on localhost */ cfg->val_log_level = 2; /* to fill why_bogus with */ cfg->val_log_squelch = 1; cfg->minimal_responses = 0; return cfg; } /** check that the value passed is >= 0 */ #define IS_NUMBER_OR_ZERO \ if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0 /** check that the value passed is > 0 */ #define IS_NONZERO_NUMBER \ if(atoi(val) == 0) return 0 /** check that the value passed is not 0 and a power of 2 */ #define IS_POW2_NUMBER \ if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0 /** check that the value passed is yes or no */ #define IS_YES_OR_NO \ if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0 /** put integer_or_zero into variable */ #define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); } /** put integer_nonzero into variable */ #define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \ { IS_NONZERO_NUMBER; cfg->var = atoi(val); } /** put integer_or_zero into unsigned */ #define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); } /** put integer_or_zero into size_t */ #define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); } /** put integer_nonzero into size_t */ #define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \ { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); } /** put yesno into variable */ #define S_YNO(str, var) if(strcmp(opt, str) == 0) \ { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); } /** put memsize into variable */ #define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \ { return cfg_parse_memsize(val, &cfg->var); } /** put pow2 number into variable */ #define S_POW2(str, var) if(strcmp(opt, str)==0) \ { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); } /** put string into variable */ #define S_STR(str, var) if(strcmp(opt, str)==0) \ { free(cfg->var); return (cfg->var = strdup(val)) != NULL; } /** put string into strlist */ #define S_STRLIST(str, var) if(strcmp(opt, str)==0) \ { return cfg_strlist_insert(&cfg->var, strdup(val)); } /** put string into strlist if not present yet*/ #define S_STRLIST_UNIQ(str, var) if(strcmp(opt, str)==0) \ { if(cfg_strlist_find(cfg->var, val)) { return 0;} \ return cfg_strlist_insert(&cfg->var, strdup(val)); } /** append string to strlist */ #define S_STRLIST_APPEND(str, var) if(strcmp(opt, str)==0) \ { return cfg_strlist_append(&cfg->var, strdup(val)); } int config_set_option(struct config_file* cfg, const char* opt, const char* val) { char buf[64]; if(!opt) return 0; if(opt[strlen(opt)-1] != ':' && strlen(opt)+2stat_interval = 0; else if(atoi(val) == 0) return 0; else cfg->stat_interval = atoi(val); } else if(strcmp(opt, "num_threads:") == 0) { /* not supported, library must have 1 thread in bgworker */ return 0; } else if(strcmp(opt, "outgoing-port-permit:") == 0) { return cfg_mark_ports(val, 1, cfg->outgoing_avail_ports, 65536); } else if(strcmp(opt, "outgoing-port-avoid:") == 0) { return cfg_mark_ports(val, 0, cfg->outgoing_avail_ports, 65536); } else if(strcmp(opt, "local-zone:") == 0) { return cfg_parse_local_zone(cfg, val); } else if(strcmp(opt, "val-override-date:") == 0) { if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) { cfg->val_date_override = 0; } else if(strlen(val) == 14) { cfg->val_date_override = cfg_convert_timeval(val); return cfg->val_date_override != 0; } else { if(atoi(val) == 0) return 0; cfg->val_date_override = (uint32_t)atoi(val); } } else if(strcmp(opt, "local-data-ptr:") == 0) { char* ptr = cfg_ptr_reverse((char*)opt); return cfg_strlist_insert(&cfg->local_data, ptr); } else if(strcmp(opt, "logfile:") == 0) { cfg->use_syslog = 0; free(cfg->logfile); return (cfg->logfile = strdup(val)) != NULL; } else if(strcmp(opt, "log-time-ascii:") == 0) { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0); log_set_time_asc(cfg->log_time_ascii); } else S_SIZET_NONZERO("max-udp-size:", max_udp_size) else S_YNO("use-syslog:", use_syslog) else S_STR("log-identity:", log_identity) else S_YNO("extended-statistics:", stat_extended) else S_YNO("statistics-cumulative:", stat_cumulative) else S_YNO("shm-enable:", shm_enable) else S_NUMBER_OR_ZERO("shm-key:", shm_key) else S_YNO("do-ip4:", do_ip4) else S_YNO("do-ip6:", do_ip6) else S_YNO("do-udp:", do_udp) else S_YNO("do-tcp:", do_tcp) else S_YNO("tcp-upstream:", tcp_upstream) else S_YNO("udp-upstream-without-downstream:", udp_upstream_without_downstream) else S_NUMBER_NONZERO("tcp-mss:", tcp_mss) else S_NUMBER_NONZERO("outgoing-tcp-mss:", outgoing_tcp_mss) else S_NUMBER_NONZERO("tcp-idle-timeout:", tcp_idle_timeout) else S_YNO("edns-tcp-keepalive:", do_tcp_keepalive) else S_NUMBER_NONZERO("edns-tcp-keepalive-timeout:", tcp_keepalive_timeout) else S_YNO("ssl-upstream:", ssl_upstream) else S_STR("ssl-service-key:", ssl_service_key) else S_STR("ssl-service-pem:", ssl_service_pem) else S_NUMBER_NONZERO("ssl-port:", ssl_port) else S_STR("tls-cert-bundle:", tls_cert_bundle) else S_YNO("tls-win-cert:", tls_win_cert) else S_STRLIST("additional-tls-port:", tls_additional_port) else S_STRLIST("tls-additional-ports:", tls_additional_port) else S_STRLIST("tls-additional-port:", tls_additional_port) else S_STRLIST_APPEND("tls-session-ticket-keys:", tls_session_ticket_keys) else S_STR("tls-ciphers:", tls_ciphers) else S_STR("tls-ciphersuites:", tls_ciphersuites) else S_YNO("interface-automatic:", if_automatic) else S_YNO("use-systemd:", use_systemd) else S_YNO("do-daemonize:", do_daemonize) else S_NUMBER_NONZERO("port:", port) else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports) else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp) else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp) else S_MEMSIZE("stream-wait-size:", stream_wait_size) else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size) else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size) else S_MEMSIZE("msg-cache-size:", msg_cache_size) else S_POW2("msg-cache-slabs:", msg_cache_slabs) else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread) else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time) else S_MEMSIZE("so-rcvbuf:", so_rcvbuf) else S_MEMSIZE("so-sndbuf:", so_sndbuf) else S_YNO("so-reuseport:", so_reuseport) else S_YNO("ip-transparent:", ip_transparent) else S_YNO("ip-freebind:", ip_freebind) else S_MEMSIZE("rrset-cache-size:", rrset_cache_size) else S_POW2("rrset-cache-slabs:", rrset_cache_slabs) else S_YNO("prefetch:", prefetch) else S_YNO("prefetch-key:", prefetch_key) else S_YNO("deny-any:", deny_any) else if(strcmp(opt, "cache-max-ttl:") == 0) { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;} else if(strcmp(opt, "cache-max-negative-ttl:") == 0) { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;} else if(strcmp(opt, "cache-min-ttl:") == 0) { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;} else if(strcmp(opt, "infra-cache-min-rtt:") == 0) { IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val); RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt; } else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl) else S_POW2("infra-cache-slabs:", infra_cache_slabs) else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts) else S_NUMBER_OR_ZERO("delay-close:", delay_close) else S_STR("chroot:", chrootdir) else S_STR("username:", username) else S_STR("directory:", directory) else S_STR("pidfile:", pidfile) else S_YNO("hide-identity:", hide_identity) else S_YNO("hide-version:", hide_version) else S_YNO("hide-trustanchor:", hide_trustanchor) else S_STR("identity:", identity) else S_STR("version:", version) else S_STRLIST("root-hints:", root_hints) else S_STR("target-fetch-policy:", target_fetch_policy) else S_YNO("harden-glue:", harden_glue) else S_YNO("harden-short-bufsize:", harden_short_bufsize) else S_YNO("harden-large-queries:", harden_large_queries) else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped) else S_YNO("harden-below-nxdomain:", harden_below_nxdomain) else S_YNO("harden-referral-path:", harden_referral_path) else S_YNO("harden-algo-downgrade:", harden_algo_downgrade) else S_YNO("use-caps-for-id:", use_caps_bits_for_id) else S_STRLIST("caps-whitelist:", caps_whitelist) else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold) else S_STRLIST("private-address:", private_address) else S_STRLIST("private-domain:", private_domain) else S_YNO("do-not-query-localhost:", donotquery_localhost) else S_STRLIST("do-not-query-address:", donotqueryaddrs) else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list) else S_STRLIST("trust-anchor-file:", trust_anchor_file_list) else S_STRLIST("trust-anchor:", trust_anchor_list) else S_STRLIST("trusted-keys-file:", trusted_keys_file_list) else S_YNO("trust-anchor-signaling:", trust_anchor_signaling) else S_YNO("root-key-sentinel:", root_key_sentinel) else S_STR("dlv-anchor-file:", dlv_anchor_file) else S_STRLIST("dlv-anchor:", dlv_anchor_list) else S_STRLIST("domain-insecure:", domain_insecure) else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl) else S_YNO("val-clean-additional:", val_clean_additional) else S_NUMBER_OR_ZERO("val-log-level:", val_log_level) else S_YNO("val-log-squelch:", val_log_squelch) else S_YNO("log-queries:", log_queries) else S_YNO("log-replies:", log_replies) else S_YNO("log-tag-queryreply:", log_tag_queryreply) else S_YNO("log-local-actions:", log_local_actions) else S_YNO("log-servfail:", log_servfail) else S_YNO("val-permissive-mode:", val_permissive_mode) else S_YNO("aggressive-nsec:", aggressive_nsec) else S_YNO("ignore-cd-flag:", ignore_cd) else S_YNO("serve-expired:", serve_expired) else if(strcmp(opt, "serve_expired_ttl:") == 0) { IS_NUMBER_OR_ZERO; cfg->serve_expired_ttl = atoi(val); SERVE_EXPIRED_TTL=(time_t)cfg->serve_expired_ttl;} else S_YNO("serve-expired-ttl-reset:", serve_expired_ttl_reset) else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations) else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown) else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown) else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing) else if(strcmp(opt, "permit-small-holddown:") == 0) { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0); autr_permit_small_holddown = cfg->permit_small_holddown; } else S_MEMSIZE("key-cache-size:", key_cache_size) else S_POW2("key-cache-slabs:", key_cache_slabs) else S_MEMSIZE("neg-cache-size:", neg_cache_size) else S_YNO("minimal-responses:", minimal_responses) else S_YNO("rrset-roundrobin:", rrset_roundrobin) else S_NUMBER_OR_ZERO("unknown-server-time-limit:", unknown_server_time_limit) else S_STRLIST("local-data:", local_data) else S_YNO("unblock-lan-zones:", unblock_lan_zones) else S_YNO("insecure-lan-zones:", insecure_lan_zones) else S_YNO("control-enable:", remote_control_enable) else S_STRLIST_APPEND("control-interface:", control_ifs) else S_NUMBER_NONZERO("control-port:", control_port) else S_STR("server-key-file:", server_key_file) else S_STR("server-cert-file:", server_cert_file) else S_STR("control-key-file:", control_key_file) else S_STR("control-cert-file:", control_cert_file) else S_STR("module-config:", module_conf) else S_STRLIST("python-script:", python_script) else S_YNO("disable-dnssec-lame-check:", disable_dnssec_lame_check) #ifdef CLIENT_SUBNET /* Can't set max subnet prefix here, since that value is used when * generating the address tree. */ /* No client-subnet-always-forward here, module registration depends on * this option. */ #endif #ifdef USE_DNSTAP else S_YNO("dnstap-enable:", dnstap) else S_STR("dnstap-socket-path:", dnstap_socket_path) else S_YNO("dnstap-send-identity:", dnstap_send_identity) else S_YNO("dnstap-send-version:", dnstap_send_version) else S_STR("dnstap-identity:", dnstap_identity) else S_STR("dnstap-version:", dnstap_version) else S_YNO("dnstap-log-resolver-query-messages:", dnstap_log_resolver_query_messages) else S_YNO("dnstap-log-resolver-response-messages:", dnstap_log_resolver_response_messages) else S_YNO("dnstap-log-client-query-messages:", dnstap_log_client_query_messages) else S_YNO("dnstap-log-client-response-messages:", dnstap_log_client_response_messages) else S_YNO("dnstap-log-forwarder-query-messages:", dnstap_log_forwarder_query_messages) else S_YNO("dnstap-log-forwarder-response-messages:", dnstap_log_forwarder_response_messages) #endif #ifdef USE_DNSCRYPT else S_YNO("dnscrypt-enable:", dnscrypt) else S_NUMBER_NONZERO("dnscrypt-port:", dnscrypt_port) else S_STR("dnscrypt-provider:", dnscrypt_provider) else S_STRLIST_UNIQ("dnscrypt-provider-cert:", dnscrypt_provider_cert) else S_STRLIST("dnscrypt-provider-cert-rotated:", dnscrypt_provider_cert_rotated) else S_STRLIST_UNIQ("dnscrypt-secret-key:", dnscrypt_secret_key) else S_MEMSIZE("dnscrypt-shared-secret-cache-size:", dnscrypt_shared_secret_cache_size) else S_POW2("dnscrypt-shared-secret-cache-slabs:", dnscrypt_shared_secret_cache_slabs) else S_MEMSIZE("dnscrypt-nonce-cache-size:", dnscrypt_nonce_cache_size) else S_POW2("dnscrypt-nonce-cache-slabs:", dnscrypt_nonce_cache_slabs) #endif else if(strcmp(opt, "ip-ratelimit:") == 0) { IS_NUMBER_OR_ZERO; cfg->ip_ratelimit = atoi(val); infra_ip_ratelimit=cfg->ip_ratelimit; } else if(strcmp(opt, "ratelimit:") == 0) { IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val); infra_dp_ratelimit=cfg->ratelimit; } else S_MEMSIZE("ip-ratelimit-size:", ip_ratelimit_size) else S_MEMSIZE("ratelimit-size:", ratelimit_size) else S_POW2("ip-ratelimit-slabs:", ip_ratelimit_slabs) else S_POW2("ratelimit-slabs:", ratelimit_slabs) else S_NUMBER_OR_ZERO("ip-ratelimit-factor:", ip_ratelimit_factor) else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor) else S_SIZET_NONZERO("fast-server-num:", fast_server_num) else S_NUMBER_OR_ZERO("fast-server-permil:", fast_server_permil) else S_YNO("qname-minimisation:", qname_minimisation) else S_YNO("qname-minimisation-strict:", qname_minimisation_strict) #ifdef USE_IPSECMOD else S_YNO("ipsecmod-enabled:", ipsecmod_enabled) else S_YNO("ipsecmod-ignore-bogus:", ipsecmod_ignore_bogus) else if(strcmp(opt, "ipsecmod-max-ttl:") == 0) { IS_NUMBER_OR_ZERO; cfg->ipsecmod_max_ttl = atoi(val); } else S_YNO("ipsecmod-strict:", ipsecmod_strict) #endif else if(strcmp(opt, "define-tag:") ==0) { return config_add_tag(cfg, val); /* val_sig_skew_min and max are copied into val_env during init, * so this does not update val_env with set_option */ } else if(strcmp(opt, "val-sig-skew-min:") == 0) { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); } else if(strcmp(opt, "val-sig-skew-max:") == 0) { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); } else if (strcmp(opt, "outgoing-interface:") == 0) { char* d = strdup(val); char** oi = (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*)); if(!d || !oi) { free(d); free(oi); return -1; } if(cfg->out_ifs && cfg->num_out_ifs) { memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*)); free(cfg->out_ifs); } oi[cfg->num_out_ifs++] = d; cfg->out_ifs = oi; } else { /* unknown or unsupported (from the set_option interface): * interface, outgoing-interface, access-control, * stub-zone, name, stub-addr, stub-host, stub-prime * forward-first, stub-first, forward-ssl-upstream, * stub-ssl-upstream, forward-zone, auth-zone * name, forward-addr, forward-host, * ratelimit-for-domain, ratelimit-below-domain, * local-zone-tag, access-control-view, * send-client-subnet, client-subnet-always-forward, * max-client-subnet-ipv4, max-client-subnet-ipv6, * min-client-subnet-ipv4, min-client-subnet-ipv6, * max-ecs-tree-size-ipv4, max-ecs-tree-size-ipv6, ipsecmod_hook, * ipsecmod_whitelist. */ return 0; } return 1; } void config_print_func(char* line, void* arg) { FILE* f = (FILE*)arg; (void)fprintf(f, "%s\n", line); } /** collate func arg */ struct config_collate_arg { /** list of result items */ struct config_strlist_head list; /** if a malloc error occurred, 0 is OK */ int status; }; void config_collate_func(char* line, void* arg) { struct config_collate_arg* m = (struct config_collate_arg*)arg; if(m->status) return; if(!cfg_strlist_append(&m->list, strdup(line))) m->status = 1; } int config_get_option_list(struct config_file* cfg, const char* opt, struct config_strlist** list) { struct config_collate_arg m; memset(&m, 0, sizeof(m)); *list = NULL; if(!config_get_option(cfg, opt, config_collate_func, &m)) return 1; if(m.status) { config_delstrlist(m.list.first); return 2; } *list = m.list.first; return 0; } int config_get_option_collate(struct config_file* cfg, const char* opt, char** str) { struct config_strlist* list = NULL; int r; *str = NULL; if((r = config_get_option_list(cfg, opt, &list)) != 0) return r; *str = config_collate_cat(list); config_delstrlist(list); if(!*str) return 2; return 0; } char* config_collate_cat(struct config_strlist* list) { size_t total = 0, left; struct config_strlist* s; char *r, *w; if(!list) /* no elements */ return strdup(""); if(list->next == NULL) /* one element , no newline at end. */ return strdup(list->str); /* count total length */ for(s=list; s; s=s->next) total += strlen(s->str) + 1; /* len + newline */ left = total+1; /* one extra for nul at end */ r = malloc(left); if(!r) return NULL; w = r; for(s=list; s; s=s->next) { size_t this = strlen(s->str); if(this+2 > left) { /* sanity check */ free(r); return NULL; } snprintf(w, left, "%s\n", s->str); this = strlen(w); w += this; left -= this; } return r; } /** compare and print decimal option */ #define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \ {snprintf(buf, len, "%d", (int)cfg->var); \ func(buf, arg);} /** compare and print unsigned option */ #define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \ {snprintf(buf, len, "%u", (unsigned)cfg->var); \ func(buf, arg);} /** compare and print yesno option */ #define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \ {func(cfg->var?"yes":"no", arg);} /** compare and print string option */ #define O_STR(opt, str, var) if(strcmp(opt, str)==0) \ {func(cfg->var?cfg->var:"", arg);} /** compare and print array option */ #define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \ {int i; for(i=0; inum; i++) func(cfg->arr[i], arg);} /** compare and print memorysize option */ #define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \ if(cfg->var > 1024*1024*1024) { \ size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \ snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \ } else snprintf(buf, len, "%u", (unsigned)cfg->var); \ func(buf, arg);} /** compare and print list option */ #define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \ struct config_strlist* p = cfg->lst; \ for(p = cfg->lst; p; p = p->next) \ func(p->str, arg); \ } /** compare and print list option */ #define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \ struct config_str2list* p = cfg->lst; \ for(p = cfg->lst; p; p = p->next) { \ snprintf(buf, len, "%s %s", p->str, p->str2); \ func(buf, arg); \ } \ } /** compare and print list option */ #define O_LS3(opt, name, lst) if(strcmp(opt, name)==0) { \ struct config_str3list* p = cfg->lst; \ for(p = cfg->lst; p; p = p->next) { \ snprintf(buf, len, "%s %s %s", p->str, p->str2, p->str3); \ func(buf, arg); \ } \ } /** compare and print taglist option */ #define O_LTG(opt, name, lst) if(strcmp(opt, name)==0) { \ char* tmpstr = NULL; \ struct config_strbytelist *p = cfg->lst; \ for(p = cfg->lst; p; p = p->next) {\ tmpstr = config_taglist2str(cfg, p->str2, p->str2len); \ if(tmpstr) {\ snprintf(buf, len, "%s %s", p->str, tmpstr); \ func(buf, arg); \ free(tmpstr); \ } \ } \ } int config_get_option(struct config_file* cfg, const char* opt, void (*func)(char*,void*), void* arg) { char buf[1024], nopt[64]; size_t len = sizeof(buf); if(!opt) return 0; if(opt && opt[strlen(opt)-1] == ':' && strlen(opt)filename = filename; cfg_parser->line = 1; cfg_parser->errors = 0; cfg_parser->cfg = cfg; cfg_parser->chroot = chroot; init_cfg_parse(); } int config_read(struct config_file* cfg, const char* filename, const char* chroot) { FILE *in; char *fname = (char*)filename; #ifdef HAVE_GLOB glob_t g; size_t i; int r, flags; #endif if(!fname) return 1; /* check for wildcards */ #ifdef HAVE_GLOB if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') && !strchr(fname, '{') && !strchr(fname, '~'))) { verbose(VERB_QUERY, "wildcard found, processing %s", fname); flags = 0 #ifdef GLOB_ERR | GLOB_ERR #endif #ifdef GLOB_NOSORT | GLOB_NOSORT #endif #ifdef GLOB_BRACE | GLOB_BRACE #endif #ifdef GLOB_TILDE | GLOB_TILDE #endif ; memset(&g, 0, sizeof(g)); r = glob(fname, flags, NULL, &g); if(r) { /* some error */ globfree(&g); if(r == GLOB_NOMATCH) { verbose(VERB_QUERY, "include: " "no matches for %s", fname); return 1; } else if(r == GLOB_NOSPACE) { log_err("include: %s: " "fnametern out of memory", fname); } else if(r == GLOB_ABORTED) { log_err("wildcard include: %s: expansion " "aborted (%s)", fname, strerror(errno)); } else { log_err("wildcard include: %s: expansion " "failed (%s)", fname, strerror(errno)); } /* ignore globs that yield no files */ return 1; } /* process files found, if any */ for(i=0; i<(size_t)g.gl_pathc; i++) { if(!config_read(cfg, g.gl_pathv[i], chroot)) { log_err("error reading wildcard " "include: %s", g.gl_pathv[i]); globfree(&g); return 0; } } globfree(&g); return 1; } #endif /* HAVE_GLOB */ in = fopen(fname, "r"); if(!in) { log_err("Could not open %s: %s", fname, strerror(errno)); return 0; } create_cfg_parser(cfg, fname, chroot); ub_c_in = in; ub_c_parse(); fclose(in); if(!cfg->dnscrypt) cfg->dnscrypt_port = 0; if(cfg_parser->errors != 0) { fprintf(stderr, "read %s failed: %d errors in configuration file\n", fname, cfg_parser->errors); errno=EINVAL; return 0; } return 1; } struct config_stub* cfg_stub_find(struct config_stub*** pp, const char* nm) { struct config_stub* p = *(*pp); while(p) { if(strcmp(p->name, nm) == 0) return p; (*pp) = &p->next; p = p->next; } return NULL; } void config_delstrlist(struct config_strlist* p) { struct config_strlist *np; while(p) { np = p->next; free(p->str); free(p); p = np; } } void config_deldblstrlist(struct config_str2list* p) { struct config_str2list *np; while(p) { np = p->next; free(p->str); free(p->str2); free(p); p = np; } } void config_deltrplstrlist(struct config_str3list* p) { struct config_str3list *np; while(p) { np = p->next; free(p->str); free(p->str2); free(p->str3); free(p); p = np; } } void config_delauth(struct config_auth* p) { if(!p) return; free(p->name); config_delstrlist(p->masters); config_delstrlist(p->urls); config_delstrlist(p->allow_notify); free(p->zonefile); free(p); } void config_delauths(struct config_auth* p) { struct config_auth* np; while(p) { np = p->next; config_delauth(p); p = np; } } void config_delstub(struct config_stub* p) { if(!p) return; free(p->name); config_delstrlist(p->hosts); config_delstrlist(p->addrs); free(p); } void config_delstubs(struct config_stub* p) { struct config_stub* np; while(p) { np = p->next; config_delstub(p); p = np; } } void config_delview(struct config_view* p) { if(!p) return; free(p->name); config_deldblstrlist(p->local_zones); config_delstrlist(p->local_zones_nodefault); #ifdef USE_IPSET config_delstrlist(p->local_zones_ipset); #endif config_delstrlist(p->local_data); free(p); } void config_delviews(struct config_view* p) { struct config_view* np; while(p) { np = p->next; config_delview(p); p = np; } } /** delete string array */ static void config_del_strarray(char** array, int num) { int i; if(!array) return; for(i=0; inext; free(p->str); free(p->str2); free(p); p = np; } } void config_delete(struct config_file* cfg) { if(!cfg) return; free(cfg->username); free(cfg->chrootdir); free(cfg->directory); free(cfg->logfile); free(cfg->pidfile); free(cfg->target_fetch_policy); free(cfg->ssl_service_key); free(cfg->ssl_service_pem); free(cfg->tls_cert_bundle); config_delstrlist(cfg->tls_additional_port); config_delstrlist(cfg->tls_session_ticket_keys.first); free(cfg->tls_ciphers); free(cfg->tls_ciphersuites); free(cfg->log_identity); config_del_strarray(cfg->ifs, cfg->num_ifs); config_del_strarray(cfg->out_ifs, cfg->num_out_ifs); config_delstubs(cfg->stubs); config_delstubs(cfg->forwards); config_delauths(cfg->auths); config_delviews(cfg->views); config_delstrlist(cfg->donotqueryaddrs); config_delstrlist(cfg->root_hints); #ifdef CLIENT_SUBNET config_delstrlist(cfg->client_subnet); config_delstrlist(cfg->client_subnet_zone); #endif free(cfg->identity); free(cfg->version); free(cfg->module_conf); free(cfg->outgoing_avail_ports); config_delstrlist(cfg->caps_whitelist); config_delstrlist(cfg->private_address); config_delstrlist(cfg->private_domain); config_delstrlist(cfg->auto_trust_anchor_file_list); config_delstrlist(cfg->trust_anchor_file_list); config_delstrlist(cfg->trusted_keys_file_list); config_delstrlist(cfg->trust_anchor_list); config_delstrlist(cfg->domain_insecure); free(cfg->dlv_anchor_file); config_delstrlist(cfg->dlv_anchor_list); config_deldblstrlist(cfg->acls); config_deldblstrlist(cfg->tcp_connection_limits); free(cfg->val_nsec3_key_iterations); config_deldblstrlist(cfg->local_zones); config_delstrlist(cfg->local_zones_nodefault); #ifdef USE_IPSET config_delstrlist(cfg->local_zones_ipset); #endif config_delstrlist(cfg->local_data); config_deltrplstrlist(cfg->local_zone_overrides); config_del_strarray(cfg->tagname, cfg->num_tags); config_del_strbytelist(cfg->local_zone_tags); config_del_strbytelist(cfg->acl_tags); config_del_strbytelist(cfg->respip_tags); config_deltrplstrlist(cfg->acl_tag_actions); config_deltrplstrlist(cfg->acl_tag_datas); config_delstrlist(cfg->control_ifs.first); free(cfg->server_key_file); free(cfg->server_cert_file); free(cfg->control_key_file); free(cfg->control_cert_file); free(cfg->dns64_prefix); config_delstrlist(cfg->dns64_ignore_aaaa); free(cfg->dnstap_socket_path); free(cfg->dnstap_identity); free(cfg->dnstap_version); config_deldblstrlist(cfg->ratelimit_for_domain); config_deldblstrlist(cfg->ratelimit_below_domain); config_delstrlist(cfg->python_script); #ifdef USE_IPSECMOD free(cfg->ipsecmod_hook); config_delstrlist(cfg->ipsecmod_whitelist); #endif #ifdef USE_CACHEDB free(cfg->cachedb_backend); free(cfg->cachedb_secret); #endif #ifdef USE_IPSET free(cfg->ipset_name_v4); free(cfg->ipset_name_v6); #endif free(cfg); } static void init_outgoing_availports(int* a, int num) { /* generated with make iana_update */ const int iana_assigned[] = { #include "util/iana_ports.inc" -1 }; /* end marker to put behind trailing comma */ int i; /* do not use <1024, that could be trouble with the system, privs */ for(i=1024; i= (int)sizeof(buf) ) { log_err("cannot parse port number '%s'", str); return 0; } if(mid > str) memcpy(buf, str, (size_t)(mid-str)); buf[mid-str] = 0; low = atoi(buf); if(low == 0 && strcmp(buf, "0") != 0) { log_err("cannot parse port number '%s'", buf); return 0; } for(i=low; i<=high; i++) { if(i < num) avail[i] = (allow?i:0); } return 1; } return 1; } int cfg_scan_ports(int* avail, int num) { int i; int count = 0; for(i=0; ioutgoing_avail_ports, 65536); int i, at = 0; *avail = NULL; if(num == 0) return 0; *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int)); if(!*avail) return 0; for(i=0; i<65536; i++) { if(cfg->outgoing_avail_ports[i]) (*avail)[at++] = cfg->outgoing_avail_ports[i]; } log_assert(at == num); return num; } /** print error with file and line number */ static void ub_c_error_va_list(const char *fmt, va_list args) { cfg_parser->errors++; fprintf(stderr, "%s:%d: error: ", cfg_parser->filename, cfg_parser->line); vfprintf(stderr, fmt, args); fprintf(stderr, "\n"); } /** print error with file and line number */ void ub_c_error_msg(const char* fmt, ...) { va_list args; va_start(args, fmt); ub_c_error_va_list(fmt, args); va_end(args); } void ub_c_error(const char *str) { cfg_parser->errors++; fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename, cfg_parser->line, str); } int ub_c_wrap(void) { return 1; } int cfg_strlist_append(struct config_strlist_head* list, char* item) { struct config_strlist *s; if(!item || !list) { free(item); return 0; } s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); if(!s) { free(item); return 0; } s->str = item; s->next = NULL; if(list->last) list->last->next = s; else list->first = s; list->last = s; return 1; } int cfg_region_strlist_insert(struct regional* region, struct config_strlist** head, char* item) { struct config_strlist *s; if(!item || !head) return 0; s = (struct config_strlist*)regional_alloc_zero(region, sizeof(struct config_strlist)); if(!s) return 0; s->str = item; s->next = *head; *head = s; return 1; } struct config_strlist* cfg_strlist_find(struct config_strlist* head, const char *item) { struct config_strlist *s = head; if(!head){ return NULL; } while(s) { if(strcmp(s->str, item) == 0) { return s; } s = s->next; } return NULL; } int cfg_strlist_insert(struct config_strlist** head, char* item) { struct config_strlist *s; if(!item || !head) { free(item); return 0; } s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); if(!s) { free(item); return 0; } s->str = item; s->next = *head; *head = s; return 1; } int cfg_strlist_append_ex(struct config_strlist** head, char* item) { struct config_strlist *s; if(!item || !head) return 0; s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); if(!s) return 0; s->str = item; s->next = NULL; if (*head==NULL) { *head = s; } else { struct config_strlist *last = *head; while (last->next!=NULL) { last = last->next; } last->next = s; } return 1; } int cfg_str2list_insert(struct config_str2list** head, char* item, char* i2) { struct config_str2list *s; if(!item || !i2 || !head) { free(item); free(i2); return 0; } s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list)); if(!s) { free(item); free(i2); return 0; } s->str = item; s->str2 = i2; s->next = *head; *head = s; return 1; } int cfg_str3list_insert(struct config_str3list** head, char* item, char* i2, char* i3) { struct config_str3list *s; if(!item || !i2 || !i3 || !head) return 0; s = (struct config_str3list*)calloc(1, sizeof(struct config_str3list)); if(!s) return 0; s->str = item; s->str2 = i2; s->str3 = i3; s->next = *head; *head = s; return 1; } int cfg_strbytelist_insert(struct config_strbytelist** head, char* item, uint8_t* i2, size_t i2len) { struct config_strbytelist* s; if(!item || !i2 || !head) return 0; s = (struct config_strbytelist*)calloc(1, sizeof(*s)); if(!s) return 0; s->str = item; s->str2 = i2; s->str2len = i2len; s->next = *head; *head = s; return 1; } time_t cfg_convert_timeval(const char* str) { time_t t; struct tm tm; memset(&tm, 0, sizeof(tm)); if(strlen(str) < 14) return 0; if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon, &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) return 0; tm.tm_year -= 1900; tm.tm_mon--; /* Check values */ if (tm.tm_year < 70) return 0; if (tm.tm_mon < 0 || tm.tm_mon > 11) return 0; if (tm.tm_mday < 1 || tm.tm_mday > 31) return 0; if (tm.tm_hour < 0 || tm.tm_hour > 23) return 0; if (tm.tm_min < 0 || tm.tm_min > 59) return 0; if (tm.tm_sec < 0 || tm.tm_sec > 59) return 0; /* call ldns conversion function */ t = sldns_mktime_from_utc(&tm); return t; } int cfg_count_numbers(const char* s) { /* format ::= (sp num)+ sp */ /* num ::= [-](0-9)+ */ /* sp ::= (space|tab)* */ int num = 0; while(*s) { while(*s && isspace((unsigned char)*s)) s++; if(!*s) /* end of string */ break; if(*s == '-') s++; if(!*s) /* only - not allowed */ return 0; if(!isdigit((unsigned char)*s)) /* bad character */ return 0; while(*s && isdigit((unsigned char)*s)) s++; num++; } return num; } /** all digit number */ static int isalldigit(const char* str, size_t l) { size_t i; for(i=0; i0 && str[len-1]==' ') len--; if(len > 1 && str[len-1] == 'b') len--; else if(len > 1 && str[len-1] == 'B') len--; if(len > 1 && tolower((unsigned char)str[len-1]) == 'g') mult = 1024*1024*1024; else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm') mult = 1024*1024; else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k') mult = 1024; else if(len > 0 && isdigit((unsigned char)str[len-1])) mult = 1; else { log_err("unknown size specifier: '%s'", str); return 0; } while(len>1 && str[len-2]==' ') len--; if(!isalldigit(str, len-1)) { log_err("unknown size specifier: '%s'", str); return 0; } *res = ((size_t)atol(str)) * mult; return 1; } int find_tag_id(struct config_file* cfg, const char* tag) { int i; for(i=0; inum_tags; i++) { if(strcmp(cfg->tagname[i], tag) == 0) return i; } return -1; } int config_add_tag(struct config_file* cfg, const char* tag) { char** newarray; char* newtag; if(find_tag_id(cfg, tag) != -1) return 1; /* nothing to do */ newarray = (char**)malloc(sizeof(char*)*(cfg->num_tags+1)); if(!newarray) return 0; newtag = strdup(tag); if(!newtag) { free(newarray); return 0; } if(cfg->tagname) { memcpy(newarray, cfg->tagname, sizeof(char*)*cfg->num_tags); free(cfg->tagname); } newarray[cfg->num_tags++] = newtag; cfg->tagname = newarray; return 1; } /** set a bit in a bit array */ static void cfg_set_bit(uint8_t* bitlist, size_t len, int id) { int pos = id/8; log_assert((size_t)pos < len); (void)len; bitlist[pos] |= 1<<(id%8); } uint8_t* config_parse_taglist(struct config_file* cfg, char* str, size_t* listlen) { uint8_t* taglist = NULL; size_t len = 0; char* p, *s; /* allocate */ if(cfg->num_tags == 0) { log_err("parse taglist, but no tags defined"); return 0; } len = (size_t)(cfg->num_tags+7)/8; taglist = calloc(1, len); if(!taglist) { log_err("out of memory"); return 0; } /* parse */ s = str; while((p=strsep(&s, " \t\n")) != NULL) { if(*p) { int id = find_tag_id(cfg, p); /* set this bit in the bitlist */ if(id == -1) { log_err("unknown tag: %s", p); free(taglist); return 0; } cfg_set_bit(taglist, len, id); } } *listlen = len; return taglist; } char* config_taglist2str(struct config_file* cfg, uint8_t* taglist, size_t taglen) { char buf[10240]; size_t i, j, len = 0; buf[0] = 0; for(i=0; itagname[id]); len += strlen(buf+len); } } } return strdup(buf); } int taglist_intersect(uint8_t* list1, size_t list1len, uint8_t* list2, size_t list2len) { size_t i; if(!list1 || !list2) return 0; for(i=0; imax_ttl; MIN_TTL = (time_t)config->min_ttl; SERVE_EXPIRED_TTL = (time_t)config->serve_expired_ttl; MAX_NEG_TTL = (time_t)config->max_negative_ttl; RTT_MIN_TIMEOUT = config->infra_cache_min_rtt; EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size; MINIMAL_RESPONSES = config->minimal_responses; RRSET_ROUNDROBIN = config->rrset_roundrobin; LOG_TAG_QUERYREPLY = config->log_tag_queryreply; UNKNOWN_SERVER_NICENESS = config->unknown_server_time_limit; log_set_time_asc(config->log_time_ascii); autr_permit_small_holddown = config->permit_small_holddown; stream_wait_max = config->stream_wait_size; } void config_lookup_uid(struct config_file* cfg) { #ifdef HAVE_GETPWNAM /* translate username into uid and gid */ if(cfg->username && cfg->username[0]) { struct passwd *pwd; if((pwd = getpwnam(cfg->username)) != NULL) { cfg_uid = pwd->pw_uid; cfg_gid = pwd->pw_gid; } } #else (void)cfg; #endif } /** * Calculate string length of 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 length of string. * remember to allocate one more for 0 at end in mallocs. */ static size_t strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir) { size_t len = 0; int slashit = 0; if(cfg->chrootdir && cfg->chrootdir[0] && strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) { /* already full pathname, return it */ return strlen(fname); } /* chroot */ if(cfg->chrootdir && cfg->chrootdir[0]) { /* start with chrootdir */ len += strlen(cfg->chrootdir); slashit = 1; } /* chdir */ #ifdef UB_ON_WINDOWS if(fname[0] != 0 && fname[1] == ':') { /* full path, no chdir */ } else #endif if(fname[0] == '/' || !use_chdir) { /* full path, no chdir */ } else if(cfg->directory && cfg->directory[0]) { /* prepend chdir */ if(slashit && cfg->directory[0] != '/') len++; if(cfg->chrootdir && cfg->chrootdir[0] && strncmp(cfg->chrootdir, cfg->directory, strlen(cfg->chrootdir)) == 0) len += strlen(cfg->directory)-strlen(cfg->chrootdir); else len += strlen(cfg->directory); slashit = 1; } /* fname */ if(slashit && fname[0] != '/') len++; len += strlen(fname); return len; } char* fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir) { size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1; int slashit = 0; char* buf = (char*)malloc(len); if(!buf) return NULL; buf[0] = 0; /* is fname already in chroot ? */ if(cfg->chrootdir && cfg->chrootdir[0] && strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) { /* already full pathname, return it */ (void)strlcpy(buf, fname, len); buf[len-1] = 0; return buf; } /* chroot */ if(cfg->chrootdir && cfg->chrootdir[0]) { /* start with chrootdir */ (void)strlcpy(buf, cfg->chrootdir, len); slashit = 1; } #ifdef UB_ON_WINDOWS if(fname[0] != 0 && fname[1] == ':') { /* full path, no chdir */ } else #endif /* chdir */ if(fname[0] == '/' || !use_chdir) { /* full path, no chdir */ } else if(cfg->directory && cfg->directory[0]) { /* prepend chdir */ if(slashit && cfg->directory[0] != '/') (void)strlcat(buf, "/", len); /* is the directory already in the chroot? */ if(cfg->chrootdir && cfg->chrootdir[0] && strncmp(cfg->chrootdir, cfg->directory, strlen(cfg->chrootdir)) == 0) (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir), len); else (void)strlcat(buf, cfg->directory, len); slashit = 1; } /* fname */ if(slashit && fname[0] != '/') (void)strlcat(buf, "/", len); (void)strlcat(buf, fname, len); buf[len-1] = 0; return buf; } /** return next space character in string */ static char* next_space_pos(const char* str) { char* sp = strchr(str, ' '); char* tab = strchr(str, '\t'); if(!tab && !sp) return NULL; if(!sp) return tab; if(!tab) return sp; return (sptab)?sp:tab; } int cfg_parse_local_zone(struct config_file* cfg, const char* val) { const char *type, *name_end, *name; char buf[256]; /* parse it as: [zone_name] [between stuff] [zone_type] */ name = val; while(*name && isspace((unsigned char)*name)) name++; if(!*name) { log_err("syntax error: too short: %s", val); return 0; } name_end = next_space_pos(name); if(!name_end || !*name_end) { log_err("syntax error: expected zone type: %s", val); return 0; } if (name_end - name > 255) { log_err("syntax error: bad zone name: %s", val); return 0; } (void)strlcpy(buf, name, sizeof(buf)); buf[name_end-name] = '\0'; type = last_space_pos(name_end); while(type && *type && isspace((unsigned char)*type)) type++; if(!type || !*type) { log_err("syntax error: expected zone type: %s", val); return 0; } if(strcmp(type, "nodefault")==0) { return cfg_strlist_insert(&cfg->local_zones_nodefault, strdup(name)); #ifdef USE_IPSET } else if(strcmp(type, "ipset")==0) { return cfg_strlist_insert(&cfg->local_zones_ipset, strdup(name)); #endif } else { return cfg_str2list_insert(&cfg->local_zones, strdup(buf), strdup(type)); } } char* cfg_ptr_reverse(char* str) { char* ip, *ip_end; char* name; char* result; char buf[1024]; struct sockaddr_storage addr; socklen_t addrlen; /* parse it as: [IP] [between stuff] [name] */ ip = str; while(*ip && isspace((unsigned char)*ip)) ip++; if(!*ip) { log_err("syntax error: too short: %s", str); return NULL; } ip_end = next_space_pos(ip); if(!ip_end || !*ip_end) { log_err("syntax error: expected name: %s", str); return NULL; } name = last_space_pos(ip_end); if(!name || !*name) { log_err("syntax error: expected name: %s", str); return NULL; } sscanf(ip, "%100s", buf); buf[sizeof(buf)-1]=0; if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) { log_err("syntax error: cannot parse address: %s", str); return NULL; } /* reverse IPv4: * ddd.ddd.ddd.ddd.in-addr-arpa. * IPv6: (h.){32}.ip6.arpa. */ if(addr_is_ip6(&addr, addrlen)) { uint8_t ad[16]; const char* hex = "0123456789abcdef"; char *p = buf; int i; memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr, sizeof(ad)); for(i=15; i>=0; i--) { uint8_t b = ad[i]; *p++ = hex[ (b&0x0f) ]; *p++ = '.'; *p++ = hex[ (b&0xf0) >> 4 ]; *p++ = '.'; } snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. "); } else { uint8_t ad[4]; memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr, sizeof(ad)); snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ", (unsigned)ad[3], (unsigned)ad[2], (unsigned)ad[1], (unsigned)ad[0]); } /* printed the reverse address, now the between goop and name on end */ while(*ip_end && isspace((unsigned char)*ip_end)) ip_end++; if(name>ip_end) { snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s", (int)(name-ip_end), ip_end); } snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name); result = strdup(buf); if(!result) { log_err("out of memory parsing %s", str); return NULL; } return result; } #ifdef UB_ON_WINDOWS char* w_lookup_reg_str(const char* key, const char* name) { HKEY hk = NULL; DWORD type = 0; BYTE buf[1024]; DWORD len = (DWORD)sizeof(buf); LONG ret; char* result = NULL; ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk); if(ret == ERROR_FILE_NOT_FOUND) return NULL; /* key does not exist */ else if(ret != ERROR_SUCCESS) { log_err("RegOpenKeyEx failed"); return NULL; } ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len); if(RegCloseKey(hk)) log_err("RegCloseKey"); if(ret == ERROR_FILE_NOT_FOUND) return NULL; /* name does not exist */ else if(ret != ERROR_SUCCESS) { log_err("RegQueryValueEx failed"); return NULL; } if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) { buf[sizeof(buf)-1] = 0; buf[sizeof(buf)-2] = 0; /* for multi_sz */ result = strdup((char*)buf); if(!result) log_err("out of memory"); } return result; } void w_config_adjust_directory(struct config_file* cfg) { if(cfg->directory && cfg->directory[0]) { TCHAR dirbuf[2*MAX_PATH+4]; if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) { /* get executable path, and if that contains * directories, snip off the filename part */ dirbuf[0] = 0; if(!GetModuleFileName(NULL, dirbuf, MAX_PATH)) log_err("could not GetModuleFileName"); if(strrchr(dirbuf, '\\')) { (strrchr(dirbuf, '\\'))[0] = 0; } else log_err("GetModuleFileName had no path"); if(dirbuf[0]) { /* adjust directory for later lookups to work*/ free(cfg->directory); cfg->directory = memdup(dirbuf, strlen(dirbuf)+1); } } } } #endif /* UB_ON_WINDOWS */ void errinf(struct module_qstate* qstate, const char* str) { struct config_strlist* p; if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !str) return; p = (struct config_strlist*)regional_alloc(qstate->region, sizeof(*p)); if(!p) { log_err("malloc failure in validator-error-info string"); return; } p->next = NULL; p->str = regional_strdup(qstate->region, str); if(!p->str) { log_err("malloc failure in validator-error-info string"); return; } /* add at end */ if(qstate->errinf) { struct config_strlist* q = qstate->errinf; while(q->next) q = q->next; q->next = p; } else qstate->errinf = p; } void errinf_origin(struct module_qstate* qstate, struct sock_list *origin) { struct sock_list* p; if(qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) return; for(p=origin; p; p=p->next) { char buf[256]; if(p == origin) snprintf(buf, sizeof(buf), "from "); else snprintf(buf, sizeof(buf), "and "); if(p->len == 0) snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "cache"); else addr_to_str(&p->addr, p->len, buf+strlen(buf), sizeof(buf)-strlen(buf)); errinf(qstate, buf); } } char* errinf_to_str_bogus(struct module_qstate* qstate) { char buf[20480]; char* p = buf; size_t left = sizeof(buf); struct config_strlist* s; char dname[LDNS_MAX_DOMAINLEN+1]; char t[16], c[16]; sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t)); sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c)); dname_str(qstate->qinfo.qname, dname); snprintf(p, left, "validation failure <%s %s %s>:", dname, t, c); left -= strlen(p); p += strlen(p); if(!qstate->errinf) snprintf(p, left, " misc failure"); else for(s=qstate->errinf; s; s=s->next) { snprintf(p, left, " %s", s->str); left -= strlen(p); p += strlen(p); } p = strdup(buf); if(!p) log_err("malloc failure in errinf_to_str"); return p; } char* errinf_to_str_servfail(struct module_qstate* qstate) { char buf[20480]; char* p = buf; size_t left = sizeof(buf); struct config_strlist* s; char dname[LDNS_MAX_DOMAINLEN+1]; char t[16], c[16]; sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t)); sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c)); dname_str(qstate->qinfo.qname, dname); snprintf(p, left, "SERVFAIL <%s %s %s>:", dname, t, c); left -= strlen(p); p += strlen(p); if(!qstate->errinf) snprintf(p, left, " misc failure"); else for(s=qstate->errinf; s; s=s->next) { snprintf(p, left, " %s", s->str); left -= strlen(p); p += strlen(p); } p = strdup(buf); if(!p) log_err("malloc failure in errinf_to_str"); return p; } void errinf_rrset(struct module_qstate* qstate, struct ub_packed_rrset_key *rr) { char buf[1024]; char dname[LDNS_MAX_DOMAINLEN+1]; char t[16], c[16]; if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !rr) return; sldns_wire2str_type_buf(ntohs(rr->rk.type), t, sizeof(t)); sldns_wire2str_class_buf(ntohs(rr->rk.rrset_class), c, sizeof(c)); dname_str(rr->rk.dname, dname); snprintf(buf, sizeof(buf), "for <%s %s %s>", dname, t, c); errinf(qstate, buf); } void errinf_dname(struct module_qstate* qstate, const char* str, uint8_t* dname) { char b[1024]; char buf[LDNS_MAX_DOMAINLEN+1]; if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !str || !dname) return; dname_str(dname, buf); snprintf(b, sizeof(b), "%s %s", str, buf); errinf(qstate, b); } int options_remote_is_address(struct config_file* cfg) { if(!cfg->remote_control_enable) return 0; if(!cfg->control_ifs.first) return 1; if(!cfg->control_ifs.first->str) return 1; if(cfg->control_ifs.first->str[0] == 0) return 1; return (cfg->control_ifs.first->str[0] != '/'); }