uastateringing.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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 *    distribution.
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 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
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static const char* const UaStateRinging_cxx_Version =
    "$Id: UaStateRinging.cxx,v 1.9.2.2 2003/02/27 01:55:27 bko Exp $";

#include "UaStateRinging.hxx"
#include "UaStateFactory.hxx"
#include "BasicAgent.hxx"
#include "StatusMsg.hxx"
#include "AckMsg.hxx"
#include "SipVia.hxx"
#include "CancelMsg.hxx"
#include "SipCommand.hxx"

using namespace Vocal::UA;

void 
UaStateRinging::recvStatus(UaBase& agent, Sptr<SipMsg> msg)
                 throw (CInvalidStateException&)
{
    Sptr<StatusMsg> statusMsg;
    statusMsg.dynamicCast(msg);
    assert(statusMsg != 0);
    int statusCode = statusMsg->getStatusLine().getStatusCode();
    cpLog(LOG_DEBUG, "UaStateRinging::recvStatus:%d", statusCode);
    if(statusCode == 200 )
    {
        //Save final response for future BYE
        agent.setResponse(msg);
        agent.saveRouteList(msg, true);
        Sptr<SipSdp> sdp;
        sdp.dynamicCast(msg->getContentData(0));
        agent.setRemoteSdp(sdp);
        agent.getResponse()->setCSeq(statusMsg->getCSeq());
        agent.setLocalCSeq(statusMsg->getCSeq());
        //Notify CC
        if(agent.getControllerAgent())
            agent.getControllerAgent()->receivedStatus(agent, msg);
        agent.setCallLegState(C_LIVE);
        //Transit to Incall
        changeState(agent, UaStateFactory::instance().getState(U_STATE_INCALL));
    }
    else if(statusCode > 200)
    {
        if(statusCode != 408)
        {
            //Send ACK message
            Sptr<AckMsg> ackMsg = new AckMsg(*statusMsg);
            SipRequestLine& ackRequestLine = ackMsg->getMutableRequestLine();
            Sptr<SipCommand> sCommand;
            sCommand.dynamicCast(agent.getRequest());
            assert(sCommand != 0);

	    addSelfInVia(ackMsg);

            ackRequestLine.setUrl(sCommand->getRequestLine().getUrl());
            agent.getSipTransceiver()->sendAsync(ackMsg);
            cpLog(LOG_INFO, "Sent Ack for status (%d), going to idle state:%s" ,statusCode, ackMsg->encode().logData());
        }
        //Notify CC
        if(agent.getControllerAgent())
            agent.getControllerAgent()->receivedStatus(agent, msg);
        //Transit to Idle
        changeState(agent, UaStateFactory::instance().getState(U_STATE_IDLE));
    }
}

void 
UaStateRinging::sendStatus(UaBase& agent, Sptr<SipMsg> msg)
                 throw (CInvalidStateException&)
{
    Sptr<StatusMsg> statusMsg;
    statusMsg.dynamicCast(msg);
    assert(statusMsg != 0);
    int statusCode = statusMsg->getStatusLine().getStatusCode();
    if(statusCode < 200)
    {
        cpLog(LOG_WARNING, "UaStateRinging::Why are we receiving < 200 , ignoring..");
        return;
    }
    if(statusCode > 200)
    {
        cpLog(LOG_WARNING, "UaStateRinging::Received %d", statusCode);
        if(agent.getControllerAgent()) agent.getControllerAgent()->endCall();
        //Transit to idle
        changeState(agent, UaStateFactory::instance().getState(U_STATE_IDLE));
        return;
    }

    //Only handle status code 200
    //Send status message
    Sptr<SipSdp> sdpData;
    sdpData.dynamicCast(msg->getContentData(0));

    Sptr<SipCommand> sipCmd;
    sipCmd.dynamicCast(agent.getRequest());
    assert(sipCmd != 0);
    Sptr<StatusMsg> sendSMsg = new StatusMsg(*sipCmd, statusCode);
    sendSMsg->setNumContentData(0);
    if(sdpData != 0)
    {
        sendSMsg->setContentData(sdpData.getPtr());
        agent.setLocalSdp(sdpData); 
    }
    //// Find a nice way to do it

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

    if(mUrl == 0)
    {
	// get out of here because we cannot send appropriately.
        cpLog(LOG_WARNING, "To does not contain sip: URL");
//        if(agent.getControllerAgent()) agent.getControllerAgent()->endCall();
        //Transit to idle
        changeState(agent, UaStateFactory::instance().getState(U_STATE_IDLE));
	throw CInvalidStateException("does not contain sip: URL", 
				     __FILE__, __LINE__, 0);
        return;
    }

    assert(mUrl != 0);
    mUrl->setHost((UaBase::myNAThost));

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

    SipContact me;
    me.setUrl(mUrl);
    sendSMsg->setNumContact( 0 );
    sendSMsg->setContact( me );


    cpLog(LOG_DEBUG, "(%s) sending status %s", className().c_str(), sendSMsg->encode().logData());
    agent.getSipTransceiver()->sendReply(sendSMsg);
    agent.setResponse(sendSMsg);
    //Notify CC to start the call monitor
    if(agent.getControllerAgent()) agent.getControllerAgent()->inCall();
    agent.setCallLegState(C_LIVE);
    agent.setResponse(sendSMsg);
    //Transit to inCall
    changeState(agent, UaStateFactory::instance().getState(U_STATE_INCALL));
}


void 
UaStateRinging::recvRequest(UaBase& agent, Sptr<SipMsg> msg)
                 throw (CInvalidStateException&)
{
     if((msg->getType() == SIP_CANCEL) ||
        (msg->getType() == SIP_BYE))
     {
         agent.sendReplyForRequest(msg, 200);
         if(msg->getType() == SIP_CANCEL)
         {
             //Send status 487
             agent.sendReplyForRequest(agent.getRequest(), 487);
             if(agent.getControllerAgent()) agent.getControllerAgent()->doCancel();
         }
         agent.setCallLegState(C_NONE);
         //Notify CC
         if(agent.getControllerAgent())
             agent.getControllerAgent()->receivedRequest(agent, msg);
        //Transit to Failure
        changeState(agent, UaStateFactory::instance().getState(U_STATE_FAILURE));
    }
}


void 
UaStateRinging::sendRequest(UaBase& agent, Sptr<SipMsg> msg)
                 throw (CInvalidStateException&)
{
     if((msg->getType() == SIP_CANCEL) ||
        (msg->getType() == SIP_BYE))  //Some UAs may send BYE instead of CANCEL in Ringing
     {
         Sptr<SipCommand> sipCmd;
         agent.setCallLegState(C_NONE);
         sipCmd.dynamicCast(agent.getRequest());
         Sptr<CancelMsg> cMsg = new CancelMsg(*sipCmd);
         cpLog(LOG_DEBUG, "Sending cancel:%s" , cMsg->encode().logData());
         agent.getSipTransceiver()->sendAsync(cMsg);
         //Transit to Failure
         changeState(agent, UaStateFactory::instance().getState(U_STATE_FAILURE));
     }
}