/**
*
* Method Name: ProcessSenderReport
*
*
* Inputs: unsigned char *puchRTCPReport - A pointer to an RTCP Sender Report
*
* Outputs: None
*
* Returns: unsigned long
*
* Description: Takes the RTCP Sender Report passed and calls the CSenderReport
* object's ISenderReport interface to parse the Sender packet and
* extract the sender statistics contained therein. This method
* shall also check for the presence of receiver reports within
* the packet and call the CReceiverReport object's
* IReceiverReport interface to parse and extract its contents.
* Although no more than one receiver report is expected under the
* current Pingtel call model, it is possible that multiple
* receiver reports (one per PingTel source) may be sent. In this
* case, a new CReceiverReport object shall be created and queued
* if not already existing on the Receiver Report list.
*
*
* Usage Notes: Notifications shall be generated to all subscribing parties to
* inform them of the receipt of a new Source Report. The
* notification shall contain the event type and a pointer to the
* Source Report's IGetSenderStatistics interface.
*
*
*/
unsigned long CRTCPSource::ProcessSenderReport(unsigned char *puchRTCPReport)
{
unsigned long ulSenderSSRC = GetSenderSSRC(TRUE, puchRTCPReport);
unsigned long ulReportCount = 0;
unsigned long ulBytesProcessed;
// Has a Sender Report object been instantiated for this participant?
// Probably not, if this is the first Sender Report received in a session
if(m_poSenderReport != NULL);
// Create The Sender Report Class
else if((m_poSenderReport =
new CSenderReport(ulSenderSSRC, m_piSetReceiverStatistics)) == NULL)
{
osPrintf("**** FAILURE **** CRTCPSource::ProcessSenderReport() -"
" Unable to create Inbound Sender Report Object\n");
return(GetReportLength(puchRTCPReport));
}
// Initialize Sender Report Class
else if(!m_poSenderReport->Initialize())
{
// Release the Sender Report reference. This should cause the object
// to be destroyed
osPrintf("**** FAILURE **** CRTCPSource::ProcessSenderReport() -"
" Unable to Initialize Inbound Sender Report Object\n");
((ISenderReport *)m_poSenderReport)->Release();
return(GetReportLength(puchRTCPReport));
}
// A Sender object exists to processes this report. Let's delegate to its
// parsing methods to complete this report's processing.
if((ulBytesProcessed =
m_poSenderReport->ParseSenderReport(puchRTCPReport)) == 0)
{
osPrintf("**** FAILURE **** CRTCPSource::ProcessSenderReport() -"
" Unable to Parse Inbound Sender Report\n");
return(GetReportLength(puchRTCPReport));
}
// Let's check whether there are Receiver reports associated with this
// Sender Report. If so, delegate to the Receiver Report's processing
// method.
else if((ulReportCount = m_poSenderReport->GetReportCount()) > 0)
{
unsigned long ulRRBytesProcessed = 0;
// Send Event
SendRTCPEvent(RTCP_SR_RCVD, (void *)m_poSenderReport);
// Adjust the buffer so that it points to the beginning of the
// reception report section.
puchRTCPReport += ulBytesProcessed;
// Call Receiver Report processing method.
if((ulRRBytesProcessed =
ProcessReceiverReport(puchRTCPReport, ulReportCount)) == 0)
return(GetReportLength(puchRTCPReport));
// Bump Total Byte Processed
ulBytesProcessed += ulRRBytesProcessed;
}
return(ulBytesProcessed);
}
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;
}
void CRTCPSource::ProcessPacket(unsigned char *puchDataBuffer,
unsigned long ulBufferLength, int verbose)
{
unsigned char *SAVEpuchDataBuffer = puchDataBuffer;
unsigned long SAVEulBufferLength = ulBufferLength;
#ifdef DEBUG_RTCP_PACKETS /* [ */
if (0 < numPacketsToDump--) {
verbose = 1;
}
if (verbose) {
unsigned char *tp = puchDataBuffer;
unsigned long tl = ulBufferLength;
int i = 0;
osPrintf("CRTCPSource::ProcessPacket(%8p, %lu)\n",
puchDataBuffer, ulBufferLength);
while(tl > 0) {
osPrintf(" %02X", *tp++);
if (0xf == (0xf & i++)) osPrintf("\n");
tl--;
}
if (0 != (0xf & i)) osPrintf("\n");
}
#endif /* DEBUG_RTCP_PACKETS ] */
// This could be either a simple or composite report. Let's process the
// buffer until there is nothing more to process.
while(ulBufferLength > 0)
{
unsigned long ulBytesProcessed = 0;
// Let's peek into the RTCP header to determine the payload type of an
// RTCP report and route it to the appropriate handler.
switch(GetPayloadType(puchDataBuffer))
{
// Process Sender Report
case etSenderReport:
ulBytesProcessed = ProcessSenderReport(puchDataBuffer);
#ifdef DEBUG_RTCP_PACKETS /* [ */
if (verbose) {
osPrintf(" Sender Report (%lu bytes)\n", ulBytesProcessed);
}
#endif /* DEBUG_RTCP_PACKETS ] */
break;
// Process Receiver Report
case etReceiverReport:
ulBytesProcessed = ProcessReceiverReport(puchDataBuffer);
#ifdef DEBUG_RTCP_PACKETS /* [ */
if (verbose) {
osPrintf(" Recvr Report (%lu bytes)\n", ulBytesProcessed);
}
#endif /* DEBUG_RTCP_PACKETS ] */
break;
// Process Source Description Report
case etSDESReport:
ulBytesProcessed = ProcessSDESReport(puchDataBuffer);
#ifdef DEBUG_RTCP_PACKETS /* [ */
if (verbose) {
osPrintf(" SDES Report (%lu bytes)\n", ulBytesProcessed);
}
#endif /* DEBUG_RTCP_PACKETS ] */
break;
// Process Bye Report
case etByeReport:
ulBytesProcessed = ProcessByeReport(puchDataBuffer);
#ifdef DEBUG_RTCP_PACKETS /* [ */
if (verbose) {
osPrintf(" Bye Report (%lu bytes)\n", ulBytesProcessed);
}
#endif /* DEBUG_RTCP_PACKETS ] */
break;
// Process Application Report
case etAppReport:
ulBytesProcessed = ProcessAppReport(puchDataBuffer);
#ifdef DEBUG_RTCP_PACKETS /* [ */
if (verbose) {
osPrintf(" App Report (%lu bytes)\n", ulBytesProcessed);
}
#endif /* DEBUG_RTCP_PACKETS ] */
break;
// Unrecognized Report
default:
{
int count, i;
osPrintf("** TROUBLE ** CRTCPSource::ProcessPacket()"
" - Unrecognized RTCP Report Type of %d\n",
GetPayloadType(puchDataBuffer));
osPrintf(" - Remaining buffer length of %lu",
ulBufferLength);
count = ulBufferLength > 0 ? ulBufferLength : 0;
count = count < 100 ? count : 100;
if (count > 0) osPrintf(" containing\n==>");
for (i=0; i<count; i++) {
if (15 == (15 & i))
osPrintf(" %02X\n ", *puchDataBuffer);
else
osPrintf(" %02X", *puchDataBuffer);
puchDataBuffer++;
}
osPrintf("\n");
}
if (!verbose) {
ProcessPacket(SAVEpuchDataBuffer, SAVEulBufferLength, 1);
}
return;
}
#ifdef DEBUG_RTCP_PACKETS /* [ */
if (verbose) {
unsigned char *tp = puchDataBuffer;
unsigned long tl = ulBytesProcessed;
int i = 0;
while(tl > 0) {
osPrintf(" %02X", *tp++);
if (0xf == (0xf & i++)) osPrintf("\n");
tl--;
}
if (0 != (0xf & i)) osPrintf("\n");
}
#endif /* DEBUG_RTCP_PACKETS ] */
// Adjust length remaining and the buffer pointer so that we are
// prepared to recognize and process other reports.
puchDataBuffer += ulBytesProcessed;
ulBufferLength -= ulBytesProcessed;
}
}