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cfg_core.c
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cfg_core.c
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/*
* Copyright (C) 2007 iptelorg GmbH
*
* This file is part of Kamailio, a free SIP server.
*
* Kamailio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* Kamailio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
/** Kamailio core :: core runtime config.
* @file cfg_core.c
* @ingroup core
* Module: @ref core
*
* See
* - @ref ConfigCoreDoc
* - @ref ConfigEngine
* - @ref cfg_core.h
*/
/*!
* \page ConfigCoreDoc Documentation of configuration parser
* \section ConfigParser Configuration parser
* Further information
* - \ref ConfigEngine
* - \ref cfg_core.h
* \verbinclude cfg.txt
*
*/
#include "dprint.h"
#ifdef USE_DST_BLACKLIST
#include "dst_blacklist.h"
#endif
#include "resolve.h"
#ifdef USE_DNS_CACHE
#include "dns_cache.h"
#endif
#if defined PKG_MALLOC || defined SHM_MEM
#include "pt.h"
#endif
#include "msg_translator.h" /* fix_global_req_flags() */
#include "globals.h"
#include "sock_ut.h"
#include "cfg/cfg.h"
#include "cfg_core.h"
struct cfg_group_core default_core_cfg = {
L_WARN, /*!< print only msg. < L_WARN */
LOG_DAEMON, /*!< log_facility -- see syslog(3) */
L_DBG+1, /*!< memdbg */
#ifdef USE_DST_BLACKLIST
/* blacklist */
0, /*!< dst blacklist is disabled by default */
DEFAULT_BLST_TIMEOUT,
DEFAULT_BLST_MAX_MEM,
0, /* blst_udp_imask */
0, /* blst_tcp_imask */
0, /* blst_tls_imask */
0, /* blst_sctp_imask */
#endif
/* resolver */
1, /*!< dns_try_ipv6 -- on by default */
0, /*!< dns_try_naptr -- off by default */
30, /*!< udp transport preference (for naptr) */
20, /*!< tcp transport preference (for naptr) */
10, /*!< tls transport preference (for naptr) */
20, /*!< sctp transport preference (for naptr) */
-1, /*!< dns_retr_time */
-1, /*!< dns_retr_no */
-1, /*!< dns_servers_no */
1, /*!< dns_search_list */
1, /*!< dns_search_fmatch */
0, /*!< dns_reinit */
1, /*!< dns_naptr_ignore_rfc */
/* DNS cache */
#ifdef USE_DNS_CACHE
1, /*!< use_dns_cache -- on by default */
0, /*!< dns_cache_flags */
0, /*!< use_dns_failover -- off by default */
0, /*!< dns_srv_lb -- off by default */
DEFAULT_DNS_NEG_CACHE_TTL, /*!< neg. cache ttl */
DEFAULT_DNS_CACHE_MIN_TTL, /*!< minimum ttl */
DEFAULT_DNS_CACHE_MAX_TTL, /*!< maximum ttl */
DEFAULT_DNS_MAX_MEM, /*!< dns_cache_max_mem */
0, /*!< dns_cache_del_nonexp -- delete only expired entries by default */
0, /*!< dns_cache_rec_pref -- 0 by default, do not check the existing entries. */
#endif
#ifdef PKG_MALLOC
0, /*!< mem_dump_pkg */
#endif
#ifdef SHM_MEM
0, /*!< mem_dump_shm */
#endif
DEFAULT_MAX_WHILE_LOOPS, /*!< max_while_loops */
0, /*!< udp_mtu (disabled by default) */
0, /*!< udp_mtu_try_proto -> default disabled */
0, /**< udp4_raw (disabled by default) */
1500, /**< udp4_raw_mtu (1500 by default) */
-1, /**< udp4_raw_ttl (auto detect by default) */
0, /*!< force_rport */
L_DBG+1, /*!< memlog */
3, /*!< mem_summary -flags: 0 off, 1 pkg_status, 2 shm_status,
4 pkg_sums, 8 shm_sums, 16 short_status */
0, /*!< mem_safety - 0 disabled */
0, /*!< mem_join - 0 disabled */
L_ERR, /*!< corelog */
L_ERR, /*!< latency log */
0, /*!< latency limit db */
0 /*!< latency limit action */
};
void *core_cfg = &default_core_cfg;
static int check_raw_sock_support(void* cfg_h, str* gname, str* name,
void** v)
{
int val;
val = (int)(long)(*v);
#ifndef USE_RAW_SOCKS
if (val > 0) {
ERR("no RAW_SOCKS support, please recompile with it enabled\n");
return -1;
}
return 0;
#else /* USE_RAW_SOCKS */
if (raw_udp4_send_sock < 0) {
if (val > 0) {
ERR("could not intialize raw socket on startup, please "
"restart as root or with CAP_NET_RAW\n");
return -1;
} else if (val < 0) {
/* auto and no socket => disable */
*v = (void*)(long)0;
}
} else if (val < 0) {
/* auto and socket => enable */
*v = (void*)(long)1;
}
return 0;
#endif /* USE_RAW_SOCKS */
}
static int udp4_raw_ttl_fixup(void* cfg_h, str* gname, str* name, void** val)
{
int v;
v = (int)(long)(*val);
if (v < 0) {
if (sendipv4)
v = sock_get_ttl(sendipv4->socket);
}
if (v < 0) {
/* some error => use a reasonable default */
v = 63;
}
*val = (void*)(long)v;
return 0;
}
cfg_def_t core_cfg_def[] = {
{"debug", CFG_VAR_INT|CFG_ATOMIC, 0, 0, 0, 0,
"debug level"},
{"log_facility", CFG_VAR_INT|CFG_INPUT_STRING, 0, 0, log_facility_fixup, 0,
"syslog facility, see \"man 3 syslog\""},
{"memdbg", CFG_VAR_INT|CFG_ATOMIC, 0, 0, 0, 0,
"log level for memory debugging messages"},
#ifdef USE_DST_BLACKLIST
/* blacklist */
{"use_dst_blacklist", CFG_VAR_INT, 0, 1, use_dst_blacklist_fixup, 0,
"enable/disable destination blacklisting"},
{"dst_blacklist_expire", CFG_VAR_INT, 0, 0, 0, 0,
"how much time (in s) a blacklisted destination is kept in the list"},
{"dst_blacklist_mem", CFG_VAR_INT, 0, 0, blst_max_mem_fixup, 0,
"maximum shared memory amount (in KB) used for keeping the blacklisted"
" destinations"},
{"dst_blacklist_udp_imask", CFG_VAR_INT, 0, 0, 0, blst_reinit_ign_masks,
"blacklist event ignore mask for UDP"},
{"dst_blacklist_tcp_imask", CFG_VAR_INT, 0, 0, 0, blst_reinit_ign_masks,
"blacklist event ignore mask for TCP"},
{"dst_blacklist_tls_imask", CFG_VAR_INT, 0, 0, 0, blst_reinit_ign_masks,
"blacklist event ignore mask for TLS"},
{"dst_blacklist_sctp_imask", CFG_VAR_INT, 0, 0, 0, blst_reinit_ign_masks,
"blacklist event ignore mask for SCTP"},
#endif
/* resolver */
#ifdef USE_DNS_CACHE
{"dns_try_ipv6", CFG_VAR_INT, 0, 1, dns_try_ipv6_fixup, fix_dns_flags,
#else
{"dns_try_ipv6", CFG_VAR_INT, 0, 1, dns_try_ipv6_fixup, 0,
#endif
"enable/disable IPv6 DNS lookups"},
#ifdef USE_DNS_CACHE
{"dns_try_naptr", CFG_VAR_INT, 0, 1, 0, fix_dns_flags,
#else
{"dns_try_naptr", CFG_VAR_INT, 0, 1, 0, 0,
#endif
"enable/disable NAPTR DNS lookups"},
{"dns_udp_pref", CFG_VAR_INT, 0, 0, 0, reinit_proto_prefs,
"udp protocol preference when doing NAPTR lookups"},
{"dns_tcp_pref", CFG_VAR_INT, 0, 0, 0, reinit_proto_prefs,
"tcp protocol preference when doing NAPTR lookups"},
{"dns_tls_pref", CFG_VAR_INT, 0, 0, 0, reinit_proto_prefs,
"tls protocol preference when doing NAPTR lookups"},
{"dns_sctp_pref", CFG_VAR_INT, 0, 0, 0, reinit_proto_prefs,
"sctp protocol preference when doing NAPTR lookups"},
{"dns_retr_time", CFG_VAR_INT, 0, 0, 0, resolv_reinit,
"time in s before retrying a dns request"},
{"dns_retr_no", CFG_VAR_INT, 0, 0, 0, resolv_reinit,
"number of dns retransmissions before giving up"},
{"dns_servers_no", CFG_VAR_INT, 0, 0, 0, resolv_reinit,
"how many dns servers from the ones defined in "
"/etc/resolv.conf will be used"},
{"dns_use_search_list", CFG_VAR_INT, 0, 1, 0, resolv_reinit,
"if set to 0, the search list in /etc/resolv.conf is ignored"},
{"dns_search_full_match", CFG_VAR_INT, 0, 1, 0, 0,
"enable/disable domain name checks against the search list "
"in DNS answers"},
{"dns_reinit", CFG_VAR_INT|CFG_INPUT_INT, 1, 1, dns_reinit_fixup,
resolv_reinit,
"set to 1 in order to reinitialize the DNS resolver"},
{"dns_naptr_ignore_rfc", CFG_VAR_INT, 0, 0, 0, reinit_proto_prefs,
"ignore the Order field required by RFC 2915"},
/* DNS cache */
#ifdef USE_DNS_CACHE
{"use_dns_cache", CFG_VAR_INT, 0, 1, use_dns_cache_fixup, 0,
"enable/disable the dns cache"},
{"dns_cache_flags", CFG_VAR_INT, 0, 4, 0, fix_dns_flags,
"dns cache specific resolver flags "
"(1=ipv4 only, 2=ipv6 only, 4=prefer ipv6"},
{"use_dns_failover", CFG_VAR_INT, 0, 1, use_dns_failover_fixup, 0,
"enable/disable dns failover in case the destination "
"resolves to multiple ip addresses and/or multiple SRV records "
"(depends on use_dns_cache)"},
{"dns_srv_lb", CFG_VAR_INT, 0, 1, 0, fix_dns_flags,
"enable/disable load balancing to different srv records "
"of the same priority based on the srv records weights "
"(depends on dns_failover)"},
{"dns_cache_negative_ttl", CFG_VAR_INT, 0, 0, 0, 0,
"time to live for negative results (\"not found\") "
"in seconds. Use 0 to disable"},
{"dns_cache_min_ttl", CFG_VAR_INT, 0, 0, 0, 0,
"minimum accepted time to live for a record, in seconds"},
{"dns_cache_max_ttl", CFG_VAR_INT, 0, 0, 0, 0,
"maximum accepted time to live for a record, in seconds"},
{"dns_cache_mem", CFG_VAR_INT, 0, 0, dns_cache_max_mem_fixup, 0,
"maximum memory used for the dns cache in Kb"},
{"dns_cache_del_nonexp", CFG_VAR_INT, 0, 1, 0, 0,
"allow deletion of non-expired records from the cache when "
"there is no more space left for new ones"},
{"dns_cache_rec_pref", CFG_VAR_INT, 0, 3, 0, 0,
"DNS cache record preference: "
" 0 - do not check duplicates"
" 1 - prefer old records"
" 2 - prefer new records"
" 3 - prefer records with longer lifetime"},
#endif
#ifdef PKG_MALLOC
{"mem_dump_pkg", CFG_VAR_INT, 0, 0, 0, mem_dump_pkg_cb,
"dump process memory status, parameter: pid_number"},
#endif
#ifdef SHM_MEM
{"mem_dump_shm", CFG_VAR_INT, 0, 0, mem_dump_shm_fixup, 0,
"dump shared memory status"},
#endif
{"max_while_loops", CFG_VAR_INT|CFG_ATOMIC, 0, 0, 0, 0,
"maximum iterations allowed for a while loop" },
{"udp_mtu", CFG_VAR_INT|CFG_ATOMIC, 0, 65535, 0, 0,
"fallback to a congestion controlled protocol if send size"
" exceeds udp_mtu"},
{"udp_mtu_try_proto", CFG_VAR_INT, 1, 4, 0, fix_global_req_flags,
"if send size > udp_mtu use proto (1 udp, 2 tcp, 3 tls, 4 sctp)"},
{"udp4_raw", CFG_VAR_INT | CFG_ATOMIC, -1, 1, check_raw_sock_support, 0,
"enable/disable using a raw socket for sending UDP IPV4 packets."
" Should be faster on multi-CPU linux running machines."},
{"udp4_raw_mtu", CFG_VAR_INT | CFG_ATOMIC, 28, 65535, 0, 0,
"set the MTU used when using raw sockets for udp sending."
" This value will be used when deciding whether or not to fragment"
" the packets."},
{"udp4_raw_ttl", CFG_VAR_INT | CFG_ATOMIC, -1, 255, udp4_raw_ttl_fixup, 0,
"set the IP TTL used when using raw sockets for udp sending."
" -1 will use the same value as for normal udp sockets."},
{"force_rport", CFG_VAR_INT, 0, 1, 0, fix_global_req_flags,
"force rport for all the received messages" },
{"memlog", CFG_VAR_INT|CFG_ATOMIC, 0, 0, 0, 0,
"log level for memory status/summary information"},
{"mem_summary", CFG_VAR_INT|CFG_ATOMIC, 0, 31, 0, 0,
"memory debugging information displayed on exit (flags): "
" 0 - off,"
" 1 - dump all the pkg used blocks (status),"
" 2 - dump all the shm used blocks (status),"
" 4 - summary of pkg used blocks,"
" 8 - summary of shm used blocks,"
" 16 - short status instead of dump" },
{"mem_safety", CFG_VAR_INT|CFG_ATOMIC, 0, 0, 0, 0,
"safety level for memory operations"},
{"mem_join", CFG_VAR_INT|CFG_ATOMIC, 0, 0, 0, 0,
"join free memory fragments"},
{"corelog", CFG_VAR_INT|CFG_ATOMIC, 0, 0, 0, 0,
"log level for non-critical core error messages"},
{"latency_log", CFG_VAR_INT|CFG_ATOMIC, 0, 0, 0, 0,
"log level for latency limits alert messages"},
{"latency_limit_db", CFG_VAR_INT|CFG_ATOMIC, 0, 0, 0, 0,
"limit is ms for alerting on time consuming db commands"},
{"latency_limit_action", CFG_VAR_INT|CFG_ATOMIC, 0, 0, 0, 0,
"limit is ms for alerting on time consuming config actions"},
{0, 0, 0, 0, 0, 0}
};