144 lines
3.7 KiB
C++
144 lines
3.7 KiB
C++
/**
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* sigtran.cpp
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* This file is part of the YATE Project http://YATE.null.ro
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*
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* Yet Another Signalling Stack - implements the support for SS7, ISDN and PSTN
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*
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* Yet Another Telephony Engine - a fully featured software PBX and IVR
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* Copyright (C) 2004-2006 Null Team
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*
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* This program 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.
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*
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* This program 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "yatesig.h"
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using namespace TelEngine;
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#define MAKE_NAME(x) { #x, SIGTRAN::x }
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static const TokenDict s_classes[] = {
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// this list must be kept in synch with the header
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MAKE_NAME(MGMT),
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MAKE_NAME(TRAN),
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MAKE_NAME(SSNM),
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MAKE_NAME(ASPSM),
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MAKE_NAME(ASPTM),
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MAKE_NAME(QPTM),
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MAKE_NAME(MAUP),
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MAKE_NAME(CLMSG),
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MAKE_NAME(COMSG),
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MAKE_NAME(RKM),
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MAKE_NAME(IIM),
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MAKE_NAME(M2PA),
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{ 0, 0 }
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};
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#undef MAKE_NAME
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const TokenDict* SIGTRAN::classNames()
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{
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return s_classes;
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}
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SIGTRAN::SIGTRAN()
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: m_trans(0), m_transMutex(false,"SIGTRAN::transport")
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{
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}
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SIGTRAN::~SIGTRAN()
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{
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attach(0);
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}
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// Check if a stream in the transport is connected
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bool SIGTRAN::connected(int streamId) const
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{
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m_transMutex.lock();
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RefPointer<SIGTransport> trans = m_trans;
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m_transMutex.unlock();
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return trans && trans->connected(streamId);
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}
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// Attach a transport to the SIGTRAN instance
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void SIGTRAN::attach(SIGTransport* trans)
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{
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Lock lock(m_transMutex);
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if (trans == m_trans)
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return;
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if (trans && trans->ref())
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trans = 0;
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SIGTransport* tmp = m_trans;
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m_trans = trans;
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lock.drop();
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if (tmp) {
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tmp->attach(0);
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tmp->destruct();
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}
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if (trans)
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trans->attach(this);
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}
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// Transmit a SIGTRAN message over the attached transport
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bool SIGTRAN::transmitMSG(unsigned char msgVersion, unsigned char msgClass,
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unsigned char msgType, const DataBlock& msg, int streamId) const
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{
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m_transMutex.lock();
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RefPointer<SIGTransport> trans = m_trans;
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m_transMutex.unlock();
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return trans && trans->transmitMSG(msgVersion,msgClass,msgType,msg,streamId);
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}
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// Attach or detach an user adaptation layer
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void SIGTransport::attach(SIGTRAN* sigtran)
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{
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if (m_sigtran != sigtran) {
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m_sigtran = sigtran;
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attached(sigtran != 0);
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}
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}
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// Request processing from the adaptation layer
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bool SIGTransport::processMSG(unsigned char msgVersion, unsigned char msgClass,
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unsigned char msgType, const DataBlock& msg, int streamId) const
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{
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return m_sigtran && m_sigtran->processMSG(msgVersion,msgClass,msgType,msg,streamId);
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}
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// Build the common header and transmit a message to the network
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bool SIGTransport::transmitMSG(unsigned char msgVersion, unsigned char msgClass,
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unsigned char msgType, const DataBlock& msg, int streamId)
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{
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if (!connected(streamId))
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return false;
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unsigned char hdr[8];
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unsigned int len = 8 + msg.length();
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hdr[0] = msgVersion;
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hdr[1] = 0;
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hdr[2] = msgClass;
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hdr[3] = msgType;
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hdr[4] = 0xff & (len >> 24);
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hdr[5] = 0xff & (len >> 16);
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hdr[6] = 0xff & (len >> 8);
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hdr[7] = 0xff & len;
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DataBlock header(hdr,8,false);
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bool ok = transmitMSG(header,msg,streamId);
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header.clear(false);
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return ok;
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}
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/* vi: set ts=8 sw=4 sts=4 noet: */
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