uastateinhold.cxx

SIP（Session Initiation Protocol）是由IETF定义

/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
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 * 
 * 1. Redistributions of source code must retain the above copyright
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 * 
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 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 
 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
 *    and "Vovida Open Communication Application Library (VOCAL)" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact [e-mail].
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 * 4. Products derived from this software may not be called "VOCAL", nor
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 *    permission of Vovida Networks, Inc.
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 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
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static const char* const UaStateInHold_cxx_Version =
    "";

#include "UaStateInHold.hxx"
#include "UaStateFactory.hxx"
#include "SystemInfo.hxx"
#include "BasicAgent.hxx"
#include "AckMsg.hxx"
#include "SystemInfo.hxx"
#include "CancelMsg.hxx"
#include "UaBase.hxx"

using namespace Vocal::UA;

using namespace Vocal;

void 
UaStateInHold::recvStatus(UaBase& agent, Sptr<SipMsg> msg)
                 throw (CInvalidStateException&)
{
    cpLog(LOG_DEBUG, "UaStateInHold::recvStatus");
    Sptr<StatusMsg> statusMsg;
    statusMsg.dynamicCast(msg);
    assert(statusMsg != 0);
    int statusCode = statusMsg->getStatusLine().getStatusCode();
    if(statusCode >= 200)
    {
        //Send Ack
        if(statusMsg->getCSeq().getMethod() == INVITE_METHOD)
        {
            Sptr<AckMsg> ackMsg = new AckMsg(*statusMsg);
	    addSelfInVia(ackMsg);
            agent.getSipTransceiver()->sendAsync(ackMsg);
        }
    }
    if(statusCode == 200) {
	if (statusMsg->getCSeq().getMethod() == INVITE_METHOD)
	{
	    //Sync up the sequence number
	    agent.getResponse()->setCSeq(statusMsg->getCSeq());
	    agent.getControllerAgent()->dohold(); // DO the Hold here, since 200 OK for the
	    // REINVITE Is recevied.
	    return;
	}
    }
    
    //Notify CC   
    if(agent.getControllerAgent())
        agent.getControllerAgent()->receivedStatus(agent, msg);
}

void 
UaStateInHold::sendStatus(UaBase& agent, Sptr<SipMsg> msg)
                 throw (CInvalidStateException&)
{
    cpLog(LOG_DEBUG, "UaStateInHold::sendStatus");
    Sptr<StatusMsg> statusMsg;
    statusMsg.dynamicCast(msg);
    assert(statusMsg != 0);
    int statusCode = statusMsg->getStatusLine().getStatusCode();
    if(statusCode == 200)
    {
        Sptr<SipContentData> sdpData = msg->getContentData(0);
        Sptr<SipCommand> sipCmd;
        sipCmd.dynamicCast(agent.getRequest());
        assert(sipCmd != 0);
        Sptr<StatusMsg> sendSMsg = new StatusMsg(*sipCmd, statusCode);

        if(sdpData != 0)
        {
            sendSMsg->setNumContentData(0);
            sendSMsg->setContentData(sdpData.getPtr());
        }

        Sptr<BaseUrl> bUrl = sipCmd->getTo().getUrl();
        Sptr<SipUrl> mUrl;
        mUrl.dynamicCast(bUrl);
        assert(mUrl != 0);

        mUrl->setHost(theSystem.gethostAddress());
        mUrl->setPort(Data(UaBase::mySipPort));

        SipContact me;
        me.setUrl(mUrl);
        sendSMsg->setNumContact( 0 );
        sendSMsg->setContact( me );
        agent.getSipTransceiver()->sendReply(sendSMsg); 
    }
    else if(statusCode > 200)
    {
        agent.sendReplyForRequest(agent.getRequest(), statusCode);
    }
}



void 
UaStateInHold::recvRequest(UaBase& agent, Sptr<SipMsg> msg)
                 throw (CInvalidStateException&)
{
    cpLog(LOG_DEBUG, "UaStateInHold::recvRequest");
    Sptr<SipCommand> sipCmd;
    sipCmd.dynamicCast(msg);
    assert(sipCmd != 0); 
    switch(msg->getType())
    {
        case SIP_INFO:
        {
            cpLog(LOG_DEBUG, "UaStateInHold, processing SIP_INFO");
            //Send 200 status msg
            agent.sendReplyForRequest(msg, 200);
            //Notify CC
            if(agent.getControllerAgent())
                agent.getControllerAgent()->receivedRequest(agent, msg);
        }
        break;
        case SIP_BYE:
        {
            cpLog(LOG_DEBUG, "UaStateInHold, processing SIP_BYE");
            //Send 200 
            agent.sendReplyForRequest(msg, 200);
            //Notify CC of the call end
            if(agent.getControllerAgent()) 
            {
                agent.getControllerAgent()->endCall();
                agent.getControllerAgent()->receivedRequest(agent, msg);
            }
            //Transit to Idle
            changeState(agent, UaStateFactory::instance().getState(U_STATE_IDLE));
        }
        break;
        case SIP_ACK:
        {
            cpLog(LOG_DEBUG, "UaStateInHold, processing SIP_ACK");
            //Save the Ack message for future BYE
            agent.setAck(msg);
            //Notify CC
            if(agent.getControllerAgent())
                agent.getControllerAgent()->receivedRequest(agent, msg);
        }
        break;
        case SIP_INVITE:
        {
            cpLog(LOG_DEBUG, "UaStateInHold, processing SIP_INVITE");
            //Send 100 status msg
            agent.sendReplyForRequest(msg, 100);
            agent.setRequest(msg);
            //Notify CC
            if(agent.getControllerAgent())
                agent.getControllerAgent()->reqResume(msg);
	    changeState(agent, UaStateFactory::instance().getState(U_STATE_INCALL));
        }
        break;
        case SIP_CANCEL:
        {
            cpLog(LOG_WARNING, "UaStateInHold, processing SIP_CANCEL, this is incorrect");
            //Send 200 
            agent.sendReplyForRequest(msg, 200);
            agent.sendReplyForRequest(msg, 487);
            //Notify CC of the call end
            if(agent.getControllerAgent()) 
            {
                 //Notify CC
                 agent.getControllerAgent()->receivedRequest(agent, msg);
                 agent.getControllerAgent()->endCall();
            }
            //Transit to Idle
            changeState(agent, UaStateFactory::instance().getState(U_STATE_FAILURE));
        }
        break;
        default:
            cpLog(LOG_WARNING, "Do not know what to do with message type %d:" , msg->getType());
        break;
    }
}

void 
UaStateInHold::sendRequest(UaBase& agent, Sptr<SipMsg> msg)
                 throw (CInvalidStateException&)
{
    cpLog(LOG_DEBUG, "UaStateInHold::sendRequest");
    //Send request
    switch(msg->getType())
    {
        case SIP_BYE:
        {
            agent.sendBye();
            //Transit to End
            changeState(agent, UaStateFactory::instance().getState(U_STATE_END));
        }
        break;
        case SIP_INVITE:
        {
            Sptr<InviteMsg> srcMsg;
            srcMsg.dynamicCast(msg);
       
            Sptr<InviteMsg> invMsg ;
            invMsg = agent.createReInvite(srcMsg);
            invMsg->setCallId(agent.getRequest()->getCallId());
            //Set the To tag from the previous final response
            SipTo to = invMsg->getTo();
            if(to.getUser() == agent.getResponse()->getTo().getUser())
            {
               to.setTag(agent.getResponse()->getTo().getTag());
            }
            else
            {
               to.setTag(agent.getResponse()->getFrom().getTag());
            }
            invMsg->setTo(to);

            SipFrom from = invMsg->getFrom();
            if(from.getUser() == agent.getResponse()->getFrom().getUser())
            {
                from.setTag(agent.getResponse()->getFrom().getTag());
            }
            else
            {
                from.setTag(agent.getResponse()->getTo().getTag());
            }
            invMsg->setFrom(from);

            cpLog(LOG_DEBUG, "(%s) Sending re-invite %s", agent.className().c_str(), invMsg->encode().logData());
            agent.getSipTransceiver()->sendAsync(invMsg);
	    changeState(agent, UaStateFactory::instance().getState(U_STATE_INCALL));
	    
        }
        break;
        case SIP_ACK:
        {
            //Generate ACK of the StatusMsg
            Sptr<StatusMsg> sMsg;
            sMsg.dynamicCast(agent.getResponse());
            assert(sMsg != 0);
            Sptr<AckMsg> ackMsg = new AckMsg(*sMsg);
	    addSelfInVia(ackMsg);
            agent.getSipTransceiver()->sendAsync(ackMsg);
            cpLog(LOG_DEBUG, "(%s) Sending Ack %s", agent.className().c_str(), ackMsg->encode().logData());
        }
        break;
        case SIP_CANCEL:
        {
            cpLog(LOG_WARNING, "UaStateInHold, processing SIP_CANCEL, this is incorrect");
            Sptr<SipCommand> sipCmd;
            sipCmd.dynamicCast(agent.getRequest());
            Sptr<CancelMsg> cMsg = new CancelMsg(*sipCmd);
            agent.getSipTransceiver()->sendAsync(cMsg);
            //Transit to End
            changeState(agent, UaStateFactory::instance().getState(U_STATE_END));
        }
        break;
        default:
        {
            cpLog(LOG_WARNING, "Wrong message type (%d) to handle in In Call, ignoring..", msg->getType());
        }
        break;
    }
}