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181 lines
4.0 KiB
181 lines
4.0 KiB
/*
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* $Id: sip_trans.h 1001 2008-06-02 10:19:47Z rco $
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*
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* Copyright (C) 2007 Raphael Coeffic
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*
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* This file is part of SEMS, a free SIP media server.
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*
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* SEMS is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version. This program is released under
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* the GPL with the additional exemption that compiling, linking,
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* and/or using OpenSSL is allowed.
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*
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* For a license to use the SEMS software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* SEMS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _sip_trans_h
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#define _sip_trans_h
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#include "cstring.h"
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#include <sys/socket.h>
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struct sip_msg;
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class trsp_socket;
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/**
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* Transaction types
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*/
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enum {
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TT_UAS=1,
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TT_UAC
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};
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/**
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* Transaction states
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*/
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enum {
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TS_TRYING=1, // UAC:!INV; UAS:!INV
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TS_CALLING, // UAC:INV
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TS_PROCEEDING, // UAC:INV,!INV; UAS:INV,!INV
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TS_PROCEEDING_REL, // UAS:INV
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TS_COMPLETED, // UAC:INV,!INV; UAS:INV,!INV
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TS_CONFIRMED, // UAS:INV
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TS_TERMINATED_200,
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TS_TERMINATED, // UAC:INV,!INV; UAS:INV,!INV
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TS_REMOVED
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};
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/**
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* We support at most 3 timer per transaction,
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* which is okay according to the standard
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*/
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#define SIP_TRANS_TIMERS 3
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class timer;
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class sip_trans
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{
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timer* timers[SIP_TRANS_TIMERS];
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/**
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* Resets a specific timer
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*
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* @param t the new timer
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* @param timer_type @see sip_timer_type
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*/
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void reset_timer(timer* t, unsigned int timer_type);
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public:
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/** Transaction type */
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unsigned int type;
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/** Request that initiated
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the transaction */
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sip_msg* msg;
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/** To-tag included in reply.
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(useful for ACK matching) */
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cstring to_tag;
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/** reply code of last
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sent/received reply */
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int reply_status;
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/** Transaction state */
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int state;
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/** used by UAS only; keeps RSeq of last sent reliable 1xx */
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unsigned int last_rseq;
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/**
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* Retransmission buffer
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* - UAC transaction: ACK
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* - UAS transaction: last reply
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*/
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char* retr_buf;
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/** Length of the retransmission buffer */
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int retr_len;
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/** Destination for retransmissions */
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sockaddr_storage retr_addr;
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trsp_socket* retr_socket;
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/**
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* Tells if a specific timer is set
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*
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* @param timer_type @see sip_timer_type
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*/
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bool is_timer_set(unsigned int timer_type);
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/**
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* Fetches a specific timer
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*
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* @param timer_type @see sip_timer_type
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*/
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timer* get_timer(unsigned int timer_type);
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/**
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* Resets a specfic timer with a delay value
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*
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* @param timer_type @see sip_timer_type
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* @param expires_delay delay before expiration in millisecond
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* @param bucket_id id of the transaction's bucket
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*/
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void reset_timer(unsigned int timer_type,
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unsigned int expire_delay /* ms */,
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unsigned int bucket_id);
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/**
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* Clears a specfic timer
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*
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* @param timer_type @see sip_timer_type
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*/
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void clear_timer(unsigned int timer_type);
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/**
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* Resets every timer
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*/
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void reset_all_timers();
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/**
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* Retransmits the content of the retry buffer (replies or non-200 ACK).
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*/
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void retransmit();
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sip_trans();
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~sip_trans();
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void dump() const;
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};
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#endif
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/** EMACS **
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* Local variables:
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* mode: c++
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* c-basic-offset: 4
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* End:
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*/
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