ConnectionListener.cpp

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/*
 * ConnectionListener.cpp,v 1.3 2004/01/06 19:43:01 mattid Exp
 *
 * COBAIN - Communications API for EPOC Environments
 * Copyright (C) 2002-2004 Matti Dahlbom, Matti Kokkola
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Contact: Matti Dahlbom <matti@777-team.org>
 *          Matti Kokkola <matti.kokkola@iki.fi>
 */

#include "ConnectionListener.h"
#include "clientsession.h"

// 
// the listen process is as follows:
//
// 1. user calls driver->Listen()
// 2. driver launches con listener AO 
// 3. AO waits asynchronously for notification about available 
//    incoming connection
// 4. when there is a new inbound connection, the server completes the
//    existing call with the id of the new connection
//

CConnectionListener::CConnectionListener(RCobainClientSession &aClientSession,
                                         MNetworkDriver *aDriver)
    : CActive(CActive::EPriorityStandard),
      iClientSession(aClientSession),
      iDriver(aDriver)
{
    CActiveScheduler::Add(this);
}

CConnectionListener::~CConnectionListener()
{
    Cancel();
    Deque();
}

// actual call to start listening for a connection
void CConnectionListener::DoListen()
{
    // asynchronous call that is completed when there is a new 
    // inbound connection available on the server
    iClientSession.GetIncomingSocketL(iStatus);

    // start waiting 
    SetActive();
}

void CConnectionListener::Listen(MConnectionListener *aListener)
{
    // register application callback
    iConnectionListener = aListener;

    DoListen();
}

void CConnectionListener::RunL() 
{
    // get the socket id from the request status of the completed call
    TInt id = iStatus.Int();

    // check for error
    if( id < 0 ) {
        //##TODO## need to do something
        Cancel();
        return;
    }

    // construct a socket object and return it
    RCobainSocket *socket = new (ELeave) RCobainSocket(iClientSession, id);
    
    // call application callback 
    iConnectionListener->Accept(socket, iDriver);

    // start listening for the next connection
    DoListen();
}

void CConnectionListener::DoCancel()
{
    // call server to stop listening
    iClientSession.StopListening(EBluetooth, 0);
}

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