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config_file.c
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config_file.c
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/*
* 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 <ctype.h>
#include <stdarg.h>
#ifdef HAVE_TIME_H
#include <time.h>
#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 <glob.h>
#endif
#ifdef CLIENT_SUBNET
#include "edns-subnet/edns-subnet.h"
#endif
#ifdef HAVE_PWD_H
#include <pwd.h>
#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;
size_t http2_query_buffer_max = 4 * 1024 * 1024;
size_t http2_response_buffer_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_reuse_timeout = 60 * 1000; /* 60s in milisecs */
cfg->max_reuse_tcp_queries = 200;
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->tcp_auth_query_timeout = 3 * 1000; /* 3s 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->tls_use_sni = 1;
cfg->https_port = UNBOUND_DNS_OVER_HTTPS_PORT;
if(!(cfg->http_endpoint = strdup("/dns-query"))) goto error_exit;
cfg->http_max_streams = 100;
cfg->http_query_buffer_size = 4*1024*1024;
cfg->http_response_buffer_size = 4*1024*1024;
cfg->http_nodelay = 1;
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 = 1232; /* from DNS flagday 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->infra_keep_probing = 0;
cfg->delay_close = 0;
cfg->udp_connect = 1;
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->if_automatic_ports = NULL;
cfg->so_rcvbuf = 0;
cfg->so_sndbuf = 0;
cfg->so_reuseport = REUSEPORT_DEFAULT;
cfg->ip_transparent = 0;
cfg->ip_freebind = 0;
cfg->ip_dscp = 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 = 1;
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->hide_http_user_agent = 0;
cfg->identity = NULL;
cfg->version = NULL;
cfg->http_user_agent = NULL;
cfg->nsid_cfg_str = NULL;
cfg->nsid = NULL;
cfg->nsid_len = 0;
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->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_max_restart = 5;
cfg->val_clean_additional = 1;
cfg->val_log_level = 0;
cfg->val_log_squelch = 0;
cfg->val_permissive_mode = 0;
cfg->aggressive_nsec = 1;
cfg->ignore_cd = 0;
cfg->serve_expired = 0;
cfg->serve_expired_ttl = 0;
cfg->serve_expired_ttl_reset = 0;
cfg->serve_expired_reply_ttl = 30;
cfg->serve_expired_client_timeout = 0;
cfg->serve_original_ttl = 0;
cfg->zonemd_permissive_mode = 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->dynlib_file = 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 = 1;
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 150 4096 150"))) goto error_exit;
#if defined(DNSTAP_SOCKET_PATH)
if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH)))
goto error_exit;
#endif
cfg->dnstap_bidirectional = 1;
cfg->dnstap_tls = 1;
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->ip_ratelimit_backoff = 0;
cfg->ratelimit_backoff = 0;
cfg->outbound_msg_retry = 5;
cfg->qname_minimisation = 1;
cfg->qname_minimisation_strict = 0;
cfg->shm_enable = 0;
cfg->shm_key = 11777;
cfg->edns_client_strings = NULL;
cfg->edns_client_string_opcode = 65001;
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;
cfg->pad_responses = 1;
cfg->pad_responses_block_size = 468; /* from RFC8467 */
cfg->pad_queries = 1;
cfg->pad_queries_block_size = 128; /* from RFC8467 */
#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
if(!(cfg->cachedb_backend = strdup("testframe"))) goto error_exit;
if(!(cfg->cachedb_secret = strdup("default"))) goto error_exit;
#ifdef USE_REDIS
if(!(cfg->redis_server_host = strdup("127.0.0.1"))) goto error_exit;
cfg->redis_timeout = 100;
cfg->redis_server_port = 6379;
cfg->redis_expire_records = 0;
#endif /* USE_REDIS */
#endif /* USE_CACHEDB */
#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;
cfg->harden_short_bufsize = 1;
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)+2<sizeof(buf)) {
snprintf(buf, sizeof(buf), "%s:", opt);
opt = buf;
}
S_NUMBER_OR_ZERO("verbosity:", verbosity)
else if(strcmp(opt, "statistics-interval:") == 0) {
if(strcmp(val, "0") == 0 || strcmp(val, "") == 0)
cfg->stat_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("prefer-ip4:", prefer_ip4)
else S_YNO("prefer-ip6:", prefer_ip6)
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-auth-query-timeout:", tcp_auth_query_timeout)
else S_NUMBER_NONZERO("tcp-idle-timeout:", tcp_idle_timeout)
else S_NUMBER_NONZERO("max-reuse-tcp-queries:", max_reuse_tcp_queries)
else S_NUMBER_NONZERO("tcp-reuse-timeout:", tcp_reuse_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_YNO("tls-upstream:", ssl_upstream)
else S_STR("ssl-service-key:", ssl_service_key)
else S_STR("tls-service-key:", ssl_service_key)
else S_STR("ssl-service-pem:", ssl_service_pem)
else S_STR("tls-service-pem:", ssl_service_pem)
else S_NUMBER_NONZERO("ssl-port:", ssl_port)
else S_NUMBER_NONZERO("tls-port:", ssl_port)
else S_STR("ssl-cert-bundle:", tls_cert_bundle)
else S_STR("tls-cert-bundle:", tls_cert_bundle)
else S_YNO("tls-win-cert:", tls_win_cert)
else S_STRLIST("additional-ssl-port:", tls_additional_port)
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("tls-use-sni:", tls_use_sni)
else S_NUMBER_NONZERO("https-port:", https_port)
else S_STR("http-endpoint:", http_endpoint)
else S_NUMBER_NONZERO("http-max-streams:", http_max_streams)
else S_MEMSIZE("http-query-buffer-size:", http_query_buffer_size)
else S_MEMSIZE("http-response-buffer-size:", http_response_buffer_size)
else S_YNO("http-nodelay:", http_nodelay)
else S_YNO("http-notls-downstream:", http_notls_downstream)
else S_YNO("interface-automatic:", if_automatic)
else S_STR("interface-automatic-ports:", if_automatic_ports)
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_NUMBER_OR_ZERO("ip-dscp:", ip_dscp)
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_YNO("infra-keep-probing:", infra_keep_probing)
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_YNO("udp-connect:", udp_connect)
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_YNO("hide-http-user-agent:", hide_http_user_agent)
else S_STR("identity:", identity)
else S_STR("version:", version)
else S_STR("http-user-agent:", http_user_agent)
else if(strcmp(opt, "nsid:") == 0) {
free(cfg->nsid_cfg_str);
if (!(cfg->nsid_cfg_str = strdup(val)))
return 0;
/* Empty string is just validly unsetting nsid */
if (*val == 0) {
free(cfg->nsid);
cfg->nsid = NULL;
cfg->nsid_len = 0;
return 1;
}
cfg->nsid = cfg_parse_nsid(val, &cfg->nsid_len);
return cfg->nsid != NULL;
}
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_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 if(strcmp(opt, "serve-expired:") == 0)
{ IS_YES_OR_NO; cfg->serve_expired = (strcmp(val, "yes") == 0);
SERVE_EXPIRED = cfg->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 if(strcmp(opt, "serve-expired-reply-ttl:") == 0)
{ IS_NUMBER_OR_ZERO; cfg->serve_expired_reply_ttl = atoi(val); SERVE_EXPIRED_REPLY_TTL=(time_t)cfg->serve_expired_reply_ttl;}
else S_NUMBER_OR_ZERO("serve-expired-client-timeout:", serve_expired_client_timeout)
else S_YNO("serve-original-ttl:", serve_original_ttl)
else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations)
else S_YNO("zonemd-permissive-mode:", zonemd_permissive_mode)
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_STRLIST("dynlib-file:", dynlib_file)
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_YNO("dnstap-bidirectional:", dnstap_bidirectional)
else S_STR("dnstap-socket-path:", dnstap_socket_path)
else S_STR("dnstap-ip:", dnstap_ip)
else S_YNO("dnstap-tls:", dnstap_tls)
else S_STR("dnstap-tls-server-name:", dnstap_tls_server_name)
else S_STR("dnstap-tls-cert-bundle:", dnstap_tls_cert_bundle)
else S_STR("dnstap-tls-client-key-file:", dnstap_tls_client_key_file)
else S_STR("dnstap-tls-client-cert-file:",
dnstap_tls_client_cert_file)
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_YNO("ip-ratelimit-backoff:", ip_ratelimit_backoff)
else S_YNO("ratelimit-backoff:", ratelimit_backoff)
else S_NUMBER_NONZERO("outbound-msg-retry:", outbound_msg_retry)
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)
else S_YNO("pad-responses:", pad_responses)
else S_SIZET_NONZERO("pad-responses-block-size:", pad_responses_block_size)
else S_YNO("pad-queries:", pad_queries)
else S_SIZET_NONZERO("pad-queries-block-size:", pad_queries_block_size)
#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, max and val_max_restart 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, "val-max-restart:") == 0)
{ IS_NUMBER_OR_ZERO; cfg->val_max_restart = (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; i<cfg->num; 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)<sizeof(nopt)) {
memmove(nopt, opt, strlen(opt));
nopt[strlen(opt)-1] = 0;
opt = nopt;
}
fptr_ok(fptr_whitelist_print_func(func));
O_DEC(opt, "verbosity", verbosity)
else O_DEC(opt, "statistics-interval", stat_interval)
else O_YNO(opt, "statistics-cumulative", stat_cumulative)
else O_YNO(opt, "extended-statistics", stat_extended)
else O_YNO(opt, "shm-enable", shm_enable)
else O_DEC(opt, "shm-key", shm_key)
else O_YNO(opt, "use-syslog", use_syslog)
else O_STR(opt, "log-identity", log_identity)
else O_YNO(opt, "log-time-ascii", log_time_ascii)
else O_DEC(opt, "num-threads", num_threads)
else O_IFC(opt, "interface", num_ifs, ifs)
else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs)
else O_YNO(opt, "interface-automatic", if_automatic)
else O_STR(opt, "interface-automatic-ports", if_automatic_ports)
else O_DEC(opt, "port", port)
else O_DEC(opt, "outgoing-range", outgoing_num_ports)
else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp)
else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp)
else O_MEM(opt, "stream-wait-size", stream_wait_size)