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dst_blacklist.h
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dst_blacklist.h
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/*
* Copyright (C) 2006 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 :: Destination blacklists.
* @file
* @author andrei, Gergo
* @ingroup core
* Module: @ref core
*/
#ifndef dst_black_list_h
#define dst_black_list_h
#include "ip_addr.h"
#include "parser/msg_parser.h"
#include "timer_ticks.h"
#include "cfg_core.h"
#define DEFAULT_BLST_TIMEOUT 60 /**< 1 min. */
#define DEFAULT_BLST_MAX_MEM 250 /**< 250 KB */
/** @name flags: */
/*@{ */
#define BLST_IS_IPV6 1 /**< set if the address is ipv6 */
#define BLST_ERR_SEND (1<<1) /**< set if send is denied/failed */
#define BLST_ERR_CONNECT (1<<2) /**< set if connect failed (tcp/tls) */
#define BLST_ICMP_RCVD (1<<3) /**< set if icmp error */
#define BLST_ERR_TIMEOUT (1<<4) /**< set if sip timeout */
#define BLST_503 (1<<5) /**< set for 503 replies */
#define BLST_ADM_PROHIBITED (1<<6) /**< administratively prohibited */
#define BLST_PERMANENT (1<<7) /**< never deleted, never expires */
/*@} */
/* uncomment the define above to enable blacklist callbacks support */
/*#define DST_BLACKLIST_HOOKS*/
#define DST_BLACKLIST_CONTINUE 0 /**< add: do nothing/ignore, search: ignore */
#define DST_BLACKLIST_ACCEPT 1 /**< add: force accept, search: force match */
#define DST_BLACKLIST_DENY -1 /**< add: deny, search: force no match */
#define DST_BLACKLIST_ADD_CB 1
#define DST_BLACKLIST_SEARCH_CB 2
extern unsigned blst_proto_imask[PROTO_LAST+1];
#ifdef DST_BLACKLIST_HOOKS
struct blacklist_hook{
/* WARNING: msg might be NULL, and it might point to shared memory
* without locking, do not modify it! msg can be used typically for checking
* the message flags with isflagset() */
int (*on_blst_action)(struct dest_info* si, unsigned char* err_flags,
struct sip_msg* msg);
/* called before ser shutdown */
void (*destroy)(void);
};
int register_blacklist_hook(struct blacklist_hook *h, int type);
#endif /* DST_BLACKLIST_HOOKS */
int init_dst_blacklist(void);
#ifdef USE_DST_BLACKLIST_STATS
int init_dst_blacklist_stats(int iproc_num);
#define DST_BLACKLIST_ALL_STATS "bkl_all_stats"
#endif
void destroy_dst_blacklist(void);
/** force add to the blacklist.
* like function dst_blacklist_add_to, but no ignore mask or
* blacklist enabled checks are made.
* @see dst_blacklist_add_to for the parameters and return value.
*/
int dst_blacklist_force_add_to(unsigned char err_flags, struct dest_info* si,
struct sip_msg* msg, ticks_t timeout);
/** force add to the blacklist, long version.
* like function dst_blacklist_su_to, but no ignore mask or
* blacklist enabled checks are made.
* @see dst_blacklist_su_to for the parameters and return value.
*/
int dst_blacklist_force_su_to( unsigned char err_flags,
unsigned char proto,
union sockaddr_union* dst,
struct sip_msg* msg,
ticks_t timeout);
/** checks if blacklist should be used.
* @param err_flags - blacklist reason
* @param si - filled dest_info structure pointer.
* @return 1 if blacklist is enabled (core_cfg) and the event/error
* is not in the ignore list.
* 0 otherwise
*/
#define should_blacklist(err_flags, si) \
(cfg_get(core, core_cfg, use_dst_blacklist) && \
((err_flags) & ~blst_proto_imask[(unsigned)((si)->proto)] & \
~(si)->send_flags.blst_imask ))
/** checks if blacklist should be used, long version.
* @param err_flags - blacklist reason
* @param snd_flags - snd_flags pointer, can be 0.
* @param proto - protocol, can be 0 (PROTO_NONE).
* @param su - sockaddr_union pointer, can be 0.
* @return 1 if blacklist is enabled (core_cfg) and the event/error
* is not in the ignore list. 0 otherwise
*/
#define should_blacklist_su(err_flags, snd_flags, proto, su) \
(cfg_get(core, core_cfg, use_dst_blacklist) && \
((err_flags) & ~blst_proto_imask[(unsigned)(proto)] & \
~((snd_flags)?((snd_flags_t*)(snd_flags))->blst_imask:0)))
/** adds a dst to the blacklist.
*
* @param err_flags - blacklist reason
* @param si - dest_info structure (dst).
* @param msg - sip msg struct. pointer if known, 0 otherwise.
* @param timeout - timeout in ticks.
* @return >=0 on success, -1 on error.
*/
#define dst_blacklist_add_to(err_flags, si, msg, timeout) \
(should_blacklist(err_flags, si)? \
dst_blacklist_force_add_to((err_flags), (si), (msg), (timeout))\
: 0)
/** adds a dst to the blacklist, long version.
* Similar to dst_blacklist_add_to, but uses "unpacked" parameters.
* @param err_flags - blacklist reason
* @param proto - protocol.
* @param dst - sockaddr_union pointer.
* @param snd_flags - snd_flags pointer, can be 0.
* @param msg - sip msg struct. pointer if known, 0 otherwise.
* @param timeout - timeout in ticks.
* @return >=0 on success, -1 on error.
*/
#define dst_blacklist_su_to(err_flags, proto, dst, snd_flags, msg, timeout) \
(should_blacklist_su(err_flags, snd_flags, proto, dst) ? \
dst_blacklist_force_su_to((err_flags), (proto), (dst), (msg), \
(timeout))\
: 0)
/** adds a dst to the blacklist with default timeout.
*
* @param err_flags - blacklist reason
* @param si - dest_info structure (dst).
* @param msg - sip msg struct. pointer if known, 0 otherwise.
* @return >=0 on success, -1 on error.
* @see dst_blacklist_add_to.
*/
#define dst_blacklist_add(err_flags, si, msg) \
dst_blacklist_add_to(err_flags, si, msg, \
S_TO_TICKS(cfg_get(core, core_cfg, blst_timeout)))
/** adds a dst to the blacklist with default timeout, long version.
* Similar to dst_blacklist_add_to, but uses "unpacked" parameters.
* @param err_flags - blacklist reason
* @param proto - protocol.
* @param dst - sockaddr_union pointer.
* @param snd_flags - snd_flags pointer, can be 0.
* @param msg - sip msg struct. pointer if known, 0 otherwise.
* @return >=0 on success, -1 on error.
* @see dst_blacklist_su_to.
*/
#define dst_blacklist_su(err_flags, proto, dst, snd_flags, msg) \
dst_blacklist_su_to(err_flags, proto, dst, snd_flags, msg, \
S_TO_TICKS(cfg_get(core, core_cfg, blst_timeout)))
int dst_is_blacklisted(struct dest_info* si, struct sip_msg* msg);
/** delete an entry from the blacklist. */
int dst_blacklist_del(struct dest_info* si, struct sip_msg* msg);
/** deletes all the entries from the blacklist except the permanent ones.
* (which are marked with BLST_PERMANENT)
*/
void dst_blst_flush(void);
int use_dst_blacklist_fixup(void *handle, str *gname, str *name, void **val);
/** KByte to Byte conversion. */
int blst_max_mem_fixup(void *handle, str *gname, str *name, void **val);
void blst_reinit_ign_masks(str* gname, str* name);
#endif