public bool ParseReport(RTCPPacket packet, RTPStream stream, IPEndPoint fromAddress)
{
uint reportBlocksSize = (uint)(packet.ReportCount * (6 * 4));
int length = (int)packet.Reader.BaseStream.Length - (int)packet.Reader.BaseStream.Position;
if (length < reportBlocksSize)
{
return(false);
}
for (int i = 0; i < packet.ReportCount; ++i)
{
uint senderSSRC = unchecked ((uint)IPAddress.NetworkToHostOrder(packet.Reader.ReadInt32()));
if (_logger.IsTraceEnabled)
{
_logger.Trace("\tSSRC/CSRC: {0:x8}", packet.SenderSSRC);
}
// We care only about reports about our own transmission, not others'
if (senderSSRC == stream.SSRC())
{
var RR = new RTCPRRRecord()
{
SenderSSRC = senderSSRC,
LossStats = unchecked ((uint)IPAddress.NetworkToHostOrder(packet.Reader.ReadInt32())),
HighestReceived = unchecked ((uint)IPAddress.NetworkToHostOrder(packet.Reader.ReadInt32())),
Jitter = unchecked ((uint)IPAddress.NetworkToHostOrder(packet.Reader.ReadInt32())),
TimeLastSR = unchecked ((uint)IPAddress.NetworkToHostOrder(packet.Reader.ReadInt32())),
TimeSinceLastSR = unchecked ((uint)IPAddress.NetworkToHostOrder(packet.Reader.ReadInt32()))
};
stream.Transsmitions.noteIncomingRR(RR.SenderSSRC, fromAddress,
RR.LossStats,
RR.HighestReceived,
RR.Jitter,
RR.TimeLastSR,
RR.TimeSinceLastSR);
RRRecords.Add(RR);
}
}
return(true);
}
public bool ParseReport(RTCPPacket packet)
{
int length = (int)packet.Reader.BaseStream.Length - (int)packet.Reader.BaseStream.Position;
if (_logger.IsTraceEnabled)
{
_logger.Trace("\tSSRC/CSRC: {0:x8}", packet.SenderSSRC);
}
// 'Handle' SDES packets only in debugging code, by printing out the 'SDES items':
// Process each 'chunk':
bool chunkOK = false;
while (length >= 8)
{
// A valid chunk must be at least 8 bytes long
chunkOK = false; // until we learn otherwise
// Process each 'SDES item' in the chunk:
byte itemType = packet.Reader.ReadByte();
//ADVANCE(1);
--length;
while (itemType != 0)
{
int itemLen = packet.Reader.ReadByte();
--length;
// Make sure "itemLen" allows for at least 1 zero byte at the end of the chunk:
if (itemLen + 1 > length /*|| received[br.BaseStream.Position + itemLen] != 0*/)
{
return(false);
}
var str = Encoding.ASCII.GetString(packet.Reader.ReadBytes(itemLen));
if (_logger.IsTraceEnabled)
{
_logger.Trace("\t\t{0}:{1}", itemType == 1 ? "CNAME" :
itemType == 2 ? "NAME" :
itemType == 3 ? "EMAIL" :
itemType == 4 ? "PHONE" :
itemType == 5 ? "LOC" :
itemType == 6 ? "TOOL" :
itemType == 7 ? "NOTE" :
itemType == 8 ? "PRIV" :
"(unknown)",
itemType < 8 ? str : "???"); // hack, because we know it's '\0'-terminated
}
//: "???"/* don't try to print out PRIV or unknown items */);
/*ADVANCE(itemLen); */
length -= itemLen;
itemType = packet.Reader.ReadByte();
--length;
}
if (itemType != 0)
{
return(false); // bad 'SDES item'
}
// Thus, itemType == 0. This zero 'type' marks the end of the list of SDES items.
// Skip over remaining zero padding bytes, so that this chunk ends on a 4-byte boundary:
while (length % 4 > 0 && packet.Reader.ReadByte() == 0)
{
//ADVANCE(1);
--length;
}
if (length % 4 > 0)
{
return(false); // Bad (non-zero) padding byte
}
chunkOK = true;
}
if (!chunkOK || length > 0)
{
return(false); // bad chunk, or not enough bytes for the last chunk
}
return(true);
}