int RTPSources::ProcessRTCPCompoundPacket(RTCPCompoundPacket *rtcpcomppack, const RTPTime &receivetime, const RTPAddress *senderaddress)
{
RTCPPacket *rtcppack;
int status;
bool gotownssrc = ((owndata == 0) ? false : true);
uint32_t ownssrc = ((owndata != 0) ? owndata->GetSSRC() : 0);
OnRTCPCompoundPacket(rtcpcomppack, receivetime, senderaddress);
rtcpcomppack->GotoFirstPacket();
while ((rtcppack = rtcpcomppack->GetNextPacket()) != 0)
{
if (rtcppack->IsKnownFormat())
{
switch (rtcppack->GetPacketType())
{
case RTCPPacket::SR:
{
RTCPSRPacket *p = (RTCPSRPacket *) rtcppack;
uint32_t senderssrc = p->GetSenderSSRC();
status = ProcessRTCPSenderInfo(senderssrc, p->GetNTPTimestamp(), p->GetRTPTimestamp(), p->GetSenderPacketCount(), p->GetSenderOctetCount(), receivetime,
senderaddress);
if (status < 0)
return status;
bool gotinfo = false;
if (gotownssrc)
{
int i;
int num = p->GetReceptionReportCount();
for (i = 0; i < num; i++)
{
if (p->GetSSRC(i) == ownssrc) // data is meant for us
{
gotinfo = true;
status = ProcessRTCPReportBlock(senderssrc, p->GetFractionLost(i), p->GetLostPacketCount(i), p->GetExtendedHighestSequenceNumber(i), p->GetJitter(i),
p->GetLSR(i), p->GetDLSR(i), receivetime, senderaddress);
if (status < 0)
return status;
}
}
}
if (!gotinfo)
{
status = UpdateReceiveTime(senderssrc, receivetime, senderaddress);
if (status < 0)
return status;
}
}
break;
case RTCPPacket::RR:
{
RTCPRRPacket *p = (RTCPRRPacket *) rtcppack;
uint32_t senderssrc = p->GetSenderSSRC();
bool gotinfo = false;
if (gotownssrc)
{
int i;
int num = p->GetReceptionReportCount();
for (i = 0; i < num; i++)
{
if (p->GetSSRC(i) == ownssrc)
{
gotinfo = true;
status = ProcessRTCPReportBlock(senderssrc, p->GetFractionLost(i), p->GetLostPacketCount(i), p->GetExtendedHighestSequenceNumber(i), p->GetJitter(i),
p->GetLSR(i), p->GetDLSR(i), receivetime, senderaddress);
if (status < 0)
return status;
}
}
}
if (!gotinfo)
{
status = UpdateReceiveTime(senderssrc, receivetime, senderaddress);
if (status < 0)
return status;
}
}
break;
case RTCPPacket::SDES:
{
RTCPSDESPacket *p = (RTCPSDESPacket *) rtcppack;
if (p->GotoFirstChunk())
{
do
{
uint32_t sdesssrc = p->GetChunkSSRC();
bool updated = false;
if (p->GotoFirstItem())
{
do
{
RTCPSDESPacket::ItemType t;
if ((t = p->GetItemType()) != RTCPSDESPacket::PRIV)
{
updated = true;
status = ProcessSDESNormalItem(sdesssrc, t, p->GetItemLength(), p->GetItemData(), receivetime, senderaddress);
if (status < 0)
return status;
}
#ifdef RTP_SUPPORT_SDESPRIV
else
{
updated = true;
status = ProcessSDESPrivateItem(sdesssrc, p->GetPRIVPrefixLength(), p->GetPRIVPrefixData(), p->GetPRIVValueLength(), p->GetPRIVValueData(),
receivetime, senderaddress);
if (status < 0)
return status;
}
#endif // RTP_SUPPORT_SDESPRIV
} while (p->GotoNextItem());
}
if (!updated)
{
status = UpdateReceiveTime(sdesssrc, receivetime, senderaddress);
if (status < 0)
return status;
}
} while (p->GotoNextChunk());
}
}
break;
case RTCPPacket::BYE:
{
RTCPBYEPacket *p = (RTCPBYEPacket *) rtcppack;
int i;
int num = p->GetSSRCCount();
for (i = 0; i < num; i++)
{
uint32_t byessrc = p->GetSSRC(i);
status = ProcessBYE(byessrc, p->GetReasonLength(), p->GetReasonData(), receivetime, senderaddress);
if (status < 0)
return status;
}
}
break;
case RTCPPacket::APP:
{
RTCPAPPPacket *p = (RTCPAPPPacket *) rtcppack;
OnAPPPacket(p, receivetime, senderaddress);
}
break;
case RTCPPacket::Unknown:
default:
{
OnUnknownPacketType(rtcppack, receivetime, senderaddress);
}
break;
}
}
else
{
OnUnknownPacketFormat(rtcppack, receivetime, senderaddress);
}
}
return 0;
}
int RTPPacketProcessor::ProcessRTCPBlock(unsigned char *data,int len,unsigned long ip,int port,bool *collis,double localtsunit)
{
RTCPHeader *rtcphdr;
unsigned char *data2;
int type,restlen,calclen;
int status,count;
bool firstblock;
*collis = false;
if (!initialized)
{
delete [] data;
return ERR_RTP_PACKETPROCESSORNOTINITIALIZED;
}
if (ip == conn->GetLocalIP() && port == conn->GetSendPort())
{
CheckRTCPHandler(data,len,ip,port); // let user process packet
/* processing own control information is not useful, so we won't
do it ... */
delete [] data;
return 0;
}
curip = ip;
curport = port;
data2 = data;
restlen = len;
firstblock = true;
while (restlen >= (int)sizeof(RTCPHeader))
{
rtcphdr = (RTCPHeader *)data2;
data2 += sizeof(RTCPHeader);
restlen -= sizeof(RTCPHeader);
if (rtcphdr->version == RTP_VERSION)
{
type = rtcphdr->packettype;
calclen = ntohs(rtcphdr->length);
calclen *= sizeof(RTPuint32);
count = rtcphdr->blockcount;
if (calclen <= restlen) // otherwise not all the info is included
{
/* Check if the compound packet starts with a SR or RR */
if (firstblock)
{
firstblock = false;
if (type != TYPE_RTCP_SR && type != TYPE_RTCP_RR) // not a rtcp compound packet
{
CheckRTCPHandler(data,len,ip,port); // let user process packet
delete [] data;
return 0;
}
}
/* Just handle the types */
status = 0;
switch(type)
{
case TYPE_RTCP_SR:
status = ProcessSenderReport(data2,calclen,count,collis,localtsunit);
break;
case TYPE_RTCP_RR:
status = ProcessReceiverReport(data2,calclen,count,collis,localtsunit);
break;
case TYPE_RTCP_SDES:
if (count > 0)
status = ProcessSDES(data2,calclen,count,collis,localtsunit);
break;
case TYPE_RTCP_BYE:
if (count > 0)
status = ProcessBYE(data2,calclen,count);
break;
case TYPE_RTCP_APP:
if (handlers->handlers[RTP_EXCEPTION_RECEIVERTCPAPPDATA].handler != NULL)
CallAppDataHandler(data2,calclen,count);
break;
}
if (status < 0)
{
CheckRTCPHandler(data,len,ip,port); // let user process packet
delete [] data;
return status;
}
}
}
else // Not a rtcp compound packet
{
CheckRTCPHandler(data,len,ip,port); // let user process packet
delete [] data;
return 0;
}
restlen -= calclen;
data2 += calclen;
}
if (*collis) // call handler
{
if (handlers->handlers[RTP_EXCEPTION_LOCALSSRCCOLLISION].handler != NULL)
CallLocalSSRCCollHandler(ntohl(contribsrcs->GetLocalSSRC()),ip,false,port);
}
CheckRTCPHandler(data,len,ip,port); // let user process packet
delete [] data;
return 0;
}