public ThreadedAssociation(DatagramTransport transport, AssociationListener al, bool isClient, int srcPort,
int destPort)
: base(transport, al, isClient, srcPort, destPort)
{
try
{
_transpMTU = Math.Min(transport.GetReceiveLimit(), transport.GetSendLimit());
logger.LogDebug("Transport MTU is now " + _transpMTU);
}
catch (IOException x)
{
logger.LogWarning("Failed to get suitable transport mtu ");
logger.LogWarning(x.ToString());
}
_freeBlocks = new Queue <DataChunk>(/*MAXBLOCKS*/);
_inFlight = new Dictionary <long, DataChunk>(MAXBLOCKS);
for (int i = 0; i < MAXBLOCKS; i++)
{
DataChunk dc = new DataChunk();
lock (_freeBlocks)
{
_freeBlocks.Enqueue(dc);
}
}
resetCwnd();
}
void startRcv()
{
Association me = this;
_rcv = new Thread(() =>
{
try
{
byte[] buf = new byte[_transp.GetReceiveLimit()];
while (_rcv != null)
{
try
{
int length = _transp.Receive(buf, 0, buf.Length, TICK);
if (length == DtlsSrtpTransport.DTLS_RECEIVE_ERROR_CODE)
{
// The DTLS transport has been closed or i no longer available.
break;
}
//logger.LogDebug("SCTP message received: " + Packet.getHex(buf, 0, length));
ByteBuffer pbb = new ByteBuffer(buf);
pbb.Limit = length;
Packet rec = new Packet(pbb);
deal(rec);
}
catch (SocketException e)
{
// ignore. it should be a timeout.
switch (e.SocketErrorCode)
{
case SocketError.TimedOut:
logger.LogDebug("tick time out");
break;
default:
throw e;
}
}
}
logger.LogDebug("SCTP message receive was empty, closing association listener.");
_transp.Close();
}
catch (EndOfStreamException eof)
{
unexpectedClose(eof);
logger.LogDebug(eof.ToString());
}
catch (Exception ex)
{
logger.LogDebug("Association receive failed " + ex.GetType().Name + " " + ex.ToString());
}
});
_rcv.Priority = ThreadPriority.AboveNormal;
_rcv.Name = "AssocRcv" + __assocNo;
_rcv.Start();
}
void startRcv()
{
Association me = this;
_rcv = new Thread(() => {
try {
byte[] buf = new byte[_transp.GetReceiveLimit()];
while (_rcv != null)
{
try {
int length = _transp.Receive(buf, 0, buf.Length, TICK);
if (length == -1)
{
Logger.Trace("Probably tick time out");
continue;
}
Logger.Trace("DTLS message received\n" + Packet.getHex(buf, 0, length));
ByteBuffer pbb = new ByteBuffer(buf);
pbb.Limit = length;
Packet rec = new Packet(pbb);
Logger.Debug("SCTP message parsed\n" + rec.ToString());
deal(rec);
}
catch (SocketException e) {
// ignore. it should be a timeout.
switch (e.SocketErrorCode)
{
case SocketError.TimedOut:
Logger.Trace("tick time out");
break;
default:
throw e;
}
}
}
Logger.Trace("SCTP message recv null\n Shutting down.");
_transp.Close();
}
catch (EndOfStreamException eof) {
unexpectedClose(eof);
Logger.Debug(eof.ToString());
}
catch (Exception ex) {
Logger.Debug("Association rcv failed " + ex.GetType().Name + " " + ex.ToString());
}
});
_rcv.Priority = ThreadPriority.AboveNormal;
_rcv.Name = "AssocRcv" + __assocNo;
_rcv.Start();
}
public virtual int GetReceiveLimit()
{
return(System.Math.Min(this.mPlaintextLimit,
mReadEpoch.Cipher.GetPlaintextLimit(mTransport.GetReceiveLimit() - RECORD_HEADER_LENGTH)));
}
public virtual int GetReceiveLimit()
{
return(transport.GetReceiveLimit());
}
public virtual int GetReceiveLimit()
{
return(Math.Min(mPlaintextLimit, mReadEpoch.Cipher.GetPlaintextLimit(mTransport.GetReceiveLimit() - 13)));
}