/*
 *
 * @APPLE_LICENSE_HEADER_START@
 *
 * Copyright (c) 1999-2001 Apple Computer, Inc.  All Rights Reserved. The
 * contents of this file constitute Original Code as defined in and are
 * subject to the Apple Public Source License Version 1.2 (the 'License').
 * You may not use this file except in compliance with the License.  Please
 * obtain a copy of the License at http://www.apple.com/publicsource and
 * read it before using this file.
 *
 * This Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.  Please
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 */
/*
	File:		RTCPTask.cpp

	Contains:	Implementation of class defined in RTCPTask.h
					
	
	
	

*/

#include "RTCPTask.h"
#include "QTSServerInterface.h"
#include "UDPSocketPool.h"
#include "RTPStream.h"

SInt64 RTCPTask::Run()
{
	const UInt32 kMaxRTCPPacketSize = 2048;
	char thePacketBuffer[kMaxRTCPPacketSize];
	StrPtrLen thePacket(thePacketBuffer, 0);
	
	//This task goes through all the UDPSockets in the RTPSocketPool, checking to see
	//if they have data. If they do, it demuxes the packets and sends the packet onto
	//the proper RTP session.
    EventFlags events = this->GetEvents();
    
	if (events & Task::kReadEvent)
	{
		//Must be done atomically wrt the socket pool.
		QTSServerInterface* theServer = QTSServerInterface::GetServer();
		
		OSMutexLocker locker(theServer->GetSocketPool()->GetMutex());
		for (OSQueueIter iter(theServer->GetSocketPool()->GetSocketQueue());
				!iter.IsDone(); iter.Next())
		{
			UInt32 theRemoteAddr = 0;
			UInt16 theRemotePort = 0;
	
			UDPSocketPair* thePair = (UDPSocketPair*)iter.GetCurrent()->GetEnclosingObject();
			Assert(thePair != NULL);
			
			for (UInt32 x = 0; x < 2; x++)
			{
				UDPSocket* theSocket = NULL;
				if (x == 0)
					theSocket = thePair->GetSocketA();
				else
					theSocket = thePair->GetSocketB();
					
				UDPDemuxer* theDemuxer = theSocket->GetDemuxer();
				if (theDemuxer != NULL)
					theDemuxer->GetMutex()->Lock();
				
				//get all the outstanding packets for this socket
				while (true)
				{
					thePacket.Len = 0;
					theSocket->RecvFrom(&theRemoteAddr, &theRemotePort, thePacket.Ptr,	
									kMaxRTCPPacketSize, &thePacket.Len);
					if (thePacket.Len == 0)
											{
													theSocket->RequestEvent(EV_RE);   
						break;//no more packets on this socket!
											}
						
					//if this socket has a demuxer, find the target RTPStream
					if (theDemuxer != NULL)
					{
						RTPStream* theStream = (RTPStream*)theDemuxer->GetTask(theRemoteAddr, theRemotePort);
						if (theStream != NULL)
							theStream->ProcessIncomingRTCPPacket(&thePacket);
					}
				}
				if (theDemuxer != NULL)
					theDemuxer->GetMutex()->Unlock();
			}
		}
	}
	
	return 0;
    //return QTSServerInterface::GetServer()->GetPrefs()->GetRTCPPollIntervalInMsec();
}