/*  This file is a part of JRTPLIB  Copyright (c) 1999-2007 Jori Liesenborgs  Contact: jori.liesenborgs@gmail.com  This library was developed at the "Expertisecentrum Digitale Media"  (http://www.edm.uhasselt.be), a research center of the Hasselt University  (http://www.uhasselt.be). The library is based upon work done for   my thesis at the School for Knowledge Technology (Belgium/The Netherlands).  Permission is hereby granted, free of charge, to any person obtaining a  copy of this software and associated documentation files (the "Software"),  to deal in the Software without restriction, including without limitation  the rights to use, copy, modify, merge, publish, distribute, sublicense,  and/or sell copies of the Software, and to permit persons to whom the  Software is furnished to do so, subject to the following conditions:  The above copyright notice and this permission notice shall be included  in all copies or substantial portions of the Software.  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS  IN THE SOFTWARE.*/#include "rtcpcompoundpacket.h"#include "rtprawpacket.h"#include "rtperrors.h"#include "rtpstructs.h"#include "rtpdefines.h"#include "rtcpsrpacket.h"#include "rtcprrpacket.h"#include "rtcpsdespacket.h"#include "rtcpbyepacket.h"#include "rtcpapppacket.h"#include "rtcpunknownpacket.h"#if ! (defined(WIN32) || defined(_WIN32_WCE))	#include <netinet/in.h>#endif // WIN32#include "rtpdebug.h"RTCPCompoundPacket::RTCPCompoundPacket(RTPRawPacket &rawpack, RTPMemoryManager *mgr) : RTPMemoryObject(mgr){	compoundpacket = 0;	compoundpacketlength = 0;	error = 0;		if (rawpack.IsRTP())	{		error = ERR_RTP_RTCPCOMPOUND_INVALIDPACKET;		return;	}	uint8_t *data = rawpack.GetData();	size_t datalen = rawpack.GetDataLength();	error = ParseData(data,datalen);	if (error < 0)		return;		compoundpacket = rawpack.GetData();	compoundpacketlength = rawpack.GetDataLength();	deletepacket = true;	rawpack.ZeroData();		rtcppackit = rtcppacklist.begin();}RTCPCompoundPacket::RTCPCompoundPacket(uint8_t *packet, size_t packetlen, bool deletedata, RTPMemoryManager *mgr) : RTPMemoryObject(mgr){	compoundpacket = 0;	compoundpacketlength = 0;		error = ParseData(packet,packetlen);	if (error < 0)		return;		compoundpacket = packet;	compoundpacketlength = packetlen;	deletepacket = deletedata;	rtcppackit = rtcppacklist.begin();}RTCPCompoundPacket::RTCPCompoundPacket(RTPMemoryManager *mgr) : RTPMemoryObject(mgr){	compoundpacket = 0;	compoundpacketlength = 0;	error = 0;	deletepacket = true;}int RTCPCompoundPacket::ParseData(uint8_t *data, size_t datalen){	bool first;		if (datalen < sizeof(RTCPCommonHeader))		return ERR_RTP_RTCPCOMPOUND_INVALIDPACKET;	first = true;		do	{		RTCPCommonHeader *rtcphdr;		size_t length;				rtcphdr = (RTCPCommonHeader *)data;		if (rtcphdr->version != RTP_VERSION) // check version		{			ClearPacketList();			return ERR_RTP_RTCPCOMPOUND_INVALIDPACKET;		}		if (first)		{			// Check if first packet is SR or RR						first = false;			if ( ! (rtcphdr->packettype == RTP_RTCPTYPE_SR || rtcphdr->packettype == RTP_RTCPTYPE_RR))			{				ClearPacketList();				return ERR_RTP_RTCPCOMPOUND_INVALIDPACKET;			}		}				length = (size_t)ntohs(rtcphdr->length);		length++;		length *= sizeof(uint32_t);		if (length > datalen) // invalid length field		{			ClearPacketList();			return ERR_RTP_RTCPCOMPOUND_INVALIDPACKET;		}				if (rtcphdr->padding)		{			// check if it's the last packet			if (length != datalen)			{				ClearPacketList();				return ERR_RTP_RTCPCOMPOUND_INVALIDPACKET;			}		}		RTCPPacket *p;				switch (rtcphdr->packettype)		{		case RTP_RTCPTYPE_SR:			p = RTPNew(GetMemoryManager(),RTPMEM_TYPE_CLASS_RTCPSRPACKET) RTCPSRPacket(data,length);			break;		case RTP_RTCPTYPE_RR:			p = RTPNew(GetMemoryManager(),RTPMEM_TYPE_CLASS_RTCPRRPACKET) RTCPRRPacket(data,length);			break;		case RTP_RTCPTYPE_SDES:			p = RTPNew(GetMemoryManager(),RTPMEM_TYPE_CLASS_RTCPSDESPACKET) RTCPSDESPacket(data,length);			break;		case RTP_RTCPTYPE_BYE:			p = RTPNew(GetMemoryManager(),RTPMEM_TYPE_CLASS_RTCPBYEPACKET) RTCPBYEPacket(data,length);			break;		case RTP_RTCPTYPE_APP:			p = RTPNew(GetMemoryManager(),RTPMEM_TYPE_CLASS_RTCPAPPPACKET) RTCPAPPPacket(data,length);			break;		default:			p = RTPNew(GetMemoryManager(),RTPMEM_TYPE_CLASS_RTCPUNKNOWNPACKET) RTCPUnknownPacket(data,length);		}		if (p == 0)		{			ClearPacketList();			return ERR_RTP_OUTOFMEM;		}		rtcppacklist.push_back(p);				datalen -= length;		data += length;	} while (datalen >= (size_t)sizeof(RTCPCommonHeader));	if (datalen != 0) // some remaining bytes	{		ClearPacketList();		return ERR_RTP_RTCPCOMPOUND_INVALIDPACKET;	}	return 0;}RTCPCompoundPacket::~RTCPCompoundPacket(){	ClearPacketList();	if (compoundpacket && deletepacket)		RTPDeleteByteArray(compoundpacket,GetMemoryManager());}void RTCPCompoundPacket::ClearPacketList(){	std::list<RTCPPacket *>::const_iterator it;	for (it = rtcppacklist.begin() ; it != rtcppacklist.end() ; it++)		RTPDelete(*it,GetMemoryManager());	rtcppacklist.clear();	rtcppackit = rtcppacklist.begin();}#ifdef RTPDEBUGvoid RTCPCompoundPacket::Dump(){	std::list<RTCPPacket *>::const_iterator it;	for (it = rtcppacklist.begin() ; it != rtcppacklist.end() ; it++)	{		RTCPPacket *p = *it;		p->Dump();	}}#endif // RTPDEBUG