/*  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 "rtcpcompoundpacketbuilder.h"#include "rtcpsrpacket.h"#include "rtcprrpacket.h"#include "rtcpsdespacket.h"#include "rtcpbyepacket.h"#include "rtcpapppacket.h"#if ! (defined(WIN32) || defined(_WIN32_WCE))	#include <netinet/in.h>#endif // WIN32#include "rtpdebug.h"RTCPCompoundPacketBuilder::RTCPCompoundPacketBuilder(RTPMemoryManager *mgr) : RTCPCompoundPacket(mgr), report(mgr), sdes(mgr){	byesize = 0;	appsize = 0;	maximumpacketsize = 0;	buffer = 0;	external = false;	arebuilding = false;}RTCPCompoundPacketBuilder::~RTCPCompoundPacketBuilder(){	if (external)		compoundpacket = 0; // make sure RTCPCompoundPacket doesn't delete the external buffer	ClearBuildBuffers();}void RTCPCompoundPacketBuilder::ClearBuildBuffers(){	report.Clear();	sdes.Clear();	std::list<Buffer>::const_iterator it;	for (it = byepackets.begin() ; it != byepackets.end() ; it++)	{		if ((*it).packetdata)			RTPDeleteByteArray((*it).packetdata,GetMemoryManager());	}	for (it = apppackets.begin() ; it != apppackets.end() ; it++)	{		if ((*it).packetdata)			RTPDeleteByteArray((*it).packetdata,GetMemoryManager());	}	byepackets.clear();	apppackets.clear();	byesize = 0;	appsize = 0;}int RTCPCompoundPacketBuilder::InitBuild(size_t maxpacketsize){	if (arebuilding)		return ERR_RTP_RTCPCOMPPACKBUILDER_ALREADYBUILDING;	if (compoundpacket)		return ERR_RTP_RTCPCOMPPACKBUILDER_ALREADYBUILT;	if (maxpacketsize < RTP_MINPACKETSIZE)		return ERR_RTP_RTCPCOMPPACKBUILDER_MAXPACKETSIZETOOSMALL;		maximumpacketsize = maxpacketsize;	buffer = 0;	external = false;	byesize = 0;	appsize = 0;		arebuilding = true;	return 0;}int RTCPCompoundPacketBuilder::InitBuild(void *externalbuffer,size_t buffersize){	if (arebuilding)		return ERR_RTP_RTCPCOMPPACKBUILDER_ALREADYBUILDING;	if (compoundpacket)		return ERR_RTP_RTCPCOMPPACKBUILDER_ALREADYBUILT;	if (buffersize < RTP_MINPACKETSIZE)		return ERR_RTP_RTCPCOMPPACKBUILDER_BUFFERSIZETOOSMALL;	maximumpacketsize = buffersize;	buffer = (uint8_t *)externalbuffer;	external = true;	byesize = 0;	appsize = 0;	arebuilding = true;	return 0;}int RTCPCompoundPacketBuilder::StartSenderReport(uint32_t senderssrc,const RTPNTPTime &ntptimestamp,uint32_t rtptimestamp,                                                 uint32_t packetcount,uint32_t octetcount){	if (!arebuilding)		return ERR_RTP_RTCPCOMPPACKBUILDER_NOTBUILDING;	if (report.headerlength != 0)		return ERR_RTP_RTCPCOMPPACKBUILDER_ALREADYGOTREPORT;	size_t totalsize = byesize+appsize+sdes.NeededBytes();	size_t sizeleft = maximumpacketsize-totalsize;	size_t neededsize = sizeof(RTCPCommonHeader)+sizeof(uint32_t)+sizeof(RTCPSenderReport);		if (neededsize > sizeleft)		return ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT;		// fill in some things	report.headerlength = sizeof(uint32_t)+sizeof(RTCPSenderReport);	report.isSR = true;			uint32_t *ssrc = (uint32_t *)report.headerdata;	*ssrc = htonl(senderssrc);	RTCPSenderReport *sr = (RTCPSenderReport *)(report.headerdata + sizeof(uint32_t));	sr->ntptime_msw = htonl(ntptimestamp.GetMSW());	sr->ntptime_lsw = htonl(ntptimestamp.GetLSW());	sr->rtptimestamp = htonl(rtptimestamp);	sr->packetcount = htonl(packetcount);	sr->octetcount = htonl(octetcount);	return 0;}int RTCPCompoundPacketBuilder::StartReceiverReport(uint32_t senderssrc){	if (!arebuilding)		return ERR_RTP_RTCPCOMPPACKBUILDER_NOTBUILDING;	if (report.headerlength != 0)		return ERR_RTP_RTCPCOMPPACKBUILDER_ALREADYGOTREPORT;	size_t totalsize = byesize+appsize+sdes.NeededBytes();	size_t sizeleft = maximumpacketsize-totalsize;	size_t neededsize = sizeof(RTCPCommonHeader)+sizeof(uint32_t);		if (neededsize > sizeleft)		return ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT;		// fill in some things	report.headerlength = sizeof(uint32_t);	report.isSR = false;		uint32_t *ssrc = (uint32_t *)report.headerdata;	*ssrc = htonl(senderssrc);	return 0;}int RTCPCompoundPacketBuilder::AddReportBlock(uint32_t ssrc,uint8_t fractionlost,int32_t packetslost,uint32_t exthighestseq,	                                      uint32_t jitter,uint32_t lsr,uint32_t dlsr){	if (!arebuilding)		return ERR_RTP_RTCPCOMPPACKBUILDER_NOTBUILDING;	if (report.headerlength == 0)		return ERR_RTP_RTCPCOMPPACKBUILDER_REPORTNOTSTARTED;	size_t totalothersize = byesize+appsize+sdes.NeededBytes();	size_t reportsizewithextrablock = report.NeededBytesWithExtraReportBlock();		if ((totalothersize+reportsizewithextrablock) > maximumpacketsize)		return ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT;	uint8_t *buf = RTPNew(GetMemoryManager(),RTPMEM_TYPE_CLASS_RTCPRECEIVERREPORT) uint8_t[sizeof(RTCPReceiverReport)];	if (buf == 0)		return ERR_RTP_OUTOFMEM;		RTCPReceiverReport *rr = (RTCPReceiverReport *)buf;	uint32_t *packlost = (uint32_t *)&packetslost;	uint32_t packlost2 = (*packlost);			rr->ssrc = htonl(ssrc);	rr->fractionlost = fractionlost;	rr->packetslost[2] = (uint8_t)(packlost2&0xFF);	rr->packetslost[1] = (uint8_t)((packlost2>>8)&0xFF);	rr->packetslost[0] = (uint8_t)((packlost2>>16)&0xFF);	rr->exthighseqnr = htonl(exthighestseq);	rr->jitter = htonl(jitter);	rr->lsr = htonl(lsr);	rr->dlsr = htonl(dlsr);	report.reportblocks.push_back(Buffer(buf,sizeof(RTCPReceiverReport)));	return 0;}int RTCPCompoundPacketBuilder::AddSDESSource(uint32_t ssrc){	if (!arebuilding)		return ERR_RTP_RTCPCOMPPACKBUILDER_NOTBUILDING;	size_t totalotherbytes = byesize+appsize+report.NeededBytes();	size_t sdessizewithextrasource = sdes.NeededBytesWithExtraSource();	if ((totalotherbytes + sdessizewithextrasource) > maximumpacketsize)		return ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT;	int status;	if ((status = sdes.AddSSRC(ssrc)) < 0)		return status;	return 0;}int RTCPCompoundPacketBuilder::AddSDESNormalItem(RTCPSDESPacket::ItemType t,const void *itemdata,uint8_t itemlength){	if (!arebuilding)		return ERR_RTP_RTCPCOMPPACKBUILDER_NOTBUILDING;	if (sdes.sdessources.empty())		return ERR_RTP_RTCPCOMPPACKBUILDER_NOCURRENTSOURCE;	uint8_t itemid;		switch(t)	{	case RTCPSDESPacket::CNAME:		itemid = RTCP_SDES_ID_CNAME;		break;	case RTCPSDESPacket::NAME:		itemid = RTCP_SDES_ID_NAME;		break;	case RTCPSDESPacket::EMAIL:		itemid = RTCP_SDES_ID_EMAIL;		break;	case RTCPSDESPacket::PHONE:		itemid = RTCP_SDES_ID_PHONE;		break;	case RTCPSDESPacket::LOC:		itemid = RTCP_SDES_ID_LOCATION;		break;	case RTCPSDESPacket::TOOL:		itemid = RTCP_SDES_ID_TOOL;		break;	case RTCPSDESPacket::NOTE:		itemid = RTCP_SDES_ID_NOTE;		break;	default:		return ERR_RTP_RTCPCOMPPACKBUILDER_INVALIDITEMTYPE;	}	size_t totalotherbytes = byesize+appsize+report.NeededBytes();	size_t sdessizewithextraitem = sdes.NeededBytesWithExtraItem(itemlength);	if ((sdessizewithextraitem+totalotherbytes) > maximumpacketsize)		return ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT;	uint8_t *buf;	size_t len;	buf = RTPNew(GetMemoryManager(),RTPMEM_TYPE_BUFFER_RTCPSDESBLOCK) uint8_t[sizeof(RTCPSDESHeader)+(size_t)itemlength];	if (buf == 0)		return ERR_RTP_OUTOFMEM;	len = sizeof(RTCPSDESHeader)+(size_t)itemlength;	RTCPSDESHeader *sdeshdr = (RTCPSDESHeader *)(buf);	sdeshdr->sdesid = itemid;	sdeshdr->length = itemlength;	if (itemlength != 0)		memcpy((buf + sizeof(RTCPSDESHeader)),itemdata,(size_t)itemlength);	sdes.AddItem(buf,len);	return 0;}#ifdef RTP_SUPPORT_SDESPRIVint RTCPCompoundPacketBuilder::AddSDESPrivateItem(const void *prefixdata,uint8_t prefixlength,const void *valuedata,                                                  uint8_t valuelength){	if (!arebuilding)		return ERR_RTP_RTCPCOMPPACKBUILDER_NOTBUILDING;	if (sdes.sdessources.empty())		return ERR_RTP_RTCPCOMPPACKBUILDER_NOCURRENTSOURCE;	size_t itemlength = ((size_t)prefixlength)+1+((size_t)valuelength);	if (itemlength > 255)		return ERR_RTP_RTCPCOMPPACKBUILDER_TOTALITEMLENGTHTOOBIG;		size_t totalotherbytes = byesize+appsize+report.NeededBytes();	size_t sdessizewithextraitem = sdes.NeededBytesWithExtraItem(itemlength);	if ((sdessizewithextraitem+totalotherbytes) > maximumpacketsize)		return ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT;	uint8_t *buf;	size_t len;	buf = RTPNew(GetMemoryManager(),RTPMEM_TYPE_BUFFER_RTCPSDESBLOCK) uint8_t[sizeof(RTCPSDESHeader)+itemlength];	if (buf == 0)		return ERR_RTP_OUTOFMEM;	len = sizeof(RTCPSDESHeader)+(size_t)itemlength;	RTCPSDESHeader *sdeshdr = (RTCPSDESHeader *)(buf);	sdeshdr->sdesid = RTCP_SDES_ID_PRIVATE;	sdeshdr->length = itemlength;		buf[sizeof(RTCPSDESHeader)] = prefixlength;	if (prefixlength != 0)		memcpy((buf+sizeof(RTCPSDESHeader)+1),prefixdata,(size_t)prefixlength);	if (valuelength != 0)		memcpy((buf+sizeof(RTCPSDESHeader)+1+(size_t)prefixlength),valuedata,(size_t)valuelength);	sdes.AddItem(buf,len);	return 0;