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207 lines
5.3 KiB
C++
207 lines
5.3 KiB
C++
/*
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This file is a part of JRTPLIB
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Copyright (c) 1999-2017 Jori Liesenborgs
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Contact: jori.liesenborgs@gmail.com
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This library was developed at the Expertise Centre for Digital Media
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(http://www.edm.uhasselt.be), a research center of the Hasselt University
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(http://www.uhasselt.be). The library is based upon work done for
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my thesis at the School for Knowledge Technology (Belgium/The Netherlands).
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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IN THE SOFTWARE.
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*/
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#include "rtcpcompoundpacket.h"
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#include "rtprawpacket.h"
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#include "rtperrors.h"
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#include "rtpstructs.h"
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#include "rtpdefines.h"
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#include "rtcpsrpacket.h"
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#include "rtcprrpacket.h"
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#include "rtcpsdespacket.h"
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#include "rtcpbyepacket.h"
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#include "rtcpapppacket.h"
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#include "rtcpunknownpacket.h"
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namespace qrtplib
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{
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RTCPCompoundPacket::RTCPCompoundPacket(RTPRawPacket &rawpack)
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{
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compoundpacket = 0;
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compoundpacketlength = 0;
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error = 0;
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if (rawpack.IsRTP())
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{
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error = ERR_RTP_RTCPCOMPOUND_INVALIDPACKET;
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return;
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}
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uint8_t *data = rawpack.GetData();
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std::size_t datalen = rawpack.GetDataLength();
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error = ParseData(data, datalen);
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if (error < 0) {
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return;
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}
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compoundpacket = rawpack.GetData();
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compoundpacketlength = rawpack.GetDataLength();
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rtcppackit = rtcppacklist.begin();
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}
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RTCPCompoundPacket::RTCPCompoundPacket(uint8_t *packet, std::size_t packetlen)
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{
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compoundpacket = 0;
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compoundpacketlength = 0;
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error = ParseData(packet, packetlen);
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if (error < 0) {
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return;
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}
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compoundpacket = packet;
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compoundpacketlength = packetlen;
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rtcppackit = rtcppacklist.begin();
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}
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RTCPCompoundPacket::RTCPCompoundPacket()
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{
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compoundpacket = 0;
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compoundpacketlength = 0;
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error = 0;
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}
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int RTCPCompoundPacket::ParseData(uint8_t *data, std::size_t datalen)
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{
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bool first;
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if (datalen < sizeof(RTCPCommonHeader))
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return ERR_RTP_RTCPCOMPOUND_INVALIDPACKET;
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first = true;
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do
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{
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RTCPCommonHeader *rtcphdr;
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std::size_t length;
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rtcphdr = (RTCPCommonHeader *) data;
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if (rtcphdr->version != RTP_VERSION) // check version
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{
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ClearPacketList();
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return ERR_RTP_RTCPCOMPOUND_INVALIDPACKET;
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}
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if (first)
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{
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// Check if first packet is SR or RR
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first = false;
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if (!(rtcphdr->packettype == RTP_RTCPTYPE_SR || rtcphdr->packettype == RTP_RTCPTYPE_RR))
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{
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ClearPacketList();
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return ERR_RTP_RTCPCOMPOUND_INVALIDPACKET;
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}
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}
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length = (std::size_t) m_endian.qToHost(rtcphdr->length);
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length++;
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length *= sizeof(uint32_t);
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if (length > datalen) // invalid length field
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{
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ClearPacketList();
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return ERR_RTP_RTCPCOMPOUND_INVALIDPACKET;
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}
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if (rtcphdr->padding)
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{
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// check if it's the last packet
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if (length != datalen)
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{
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ClearPacketList();
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return ERR_RTP_RTCPCOMPOUND_INVALIDPACKET;
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}
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}
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RTCPPacket *p;
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switch (rtcphdr->packettype)
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{
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case RTP_RTCPTYPE_SR:
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p = new RTCPSRPacket(data, length);
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break;
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case RTP_RTCPTYPE_RR:
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p = new RTCPRRPacket(data, length);
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break;
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case RTP_RTCPTYPE_SDES:
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p = new RTCPSDESPacket(data, length);
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break;
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case RTP_RTCPTYPE_BYE:
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p = new RTCPBYEPacket(data, length);
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break;
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case RTP_RTCPTYPE_APP:
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p = new RTCPAPPPacket(data, length);
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break;
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default:
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p = new RTCPUnknownPacket(data, length);
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}
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rtcppacklist.push_back(p);
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datalen -= length;
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data += length;
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} while (datalen >= (std::size_t) sizeof(RTCPCommonHeader));
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if (datalen != 0) // some remaining bytes
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{
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ClearPacketList();
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return ERR_RTP_RTCPCOMPOUND_INVALIDPACKET;
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}
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return 0;
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}
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RTCPCompoundPacket::~RTCPCompoundPacket()
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{
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ClearPacketList();
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}
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void RTCPCompoundPacket::ClearPacketList()
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{
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std::list<RTCPPacket *>::const_iterator it;
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for (it = rtcppacklist.begin(); it != rtcppacklist.end(); it++) {
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delete *it;
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}
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rtcppacklist.clear();
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rtcppackit = rtcppacklist.begin();
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}
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} // end namespace
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