FramingData EndReceive(Socket listenSocket, IAsyncResult result)
{
// if we've started the shutdown process, then we've disposed
// the socket and calls to socket.EndReceive will throw
if (closed)
{
return(null);
}
byte[] buffer = ((SocketReceiveState)result.AsyncState).Buffer;
Debug.Assert(buffer != null);
FramingData data = null;
try
{
int count = 0;
lock (ThisLock)
{
// if we've started the shutdown process, socket is disposed
// and calls to socket.EndReceive will throw
if (!closed)
{
EndPoint dummy = CreateDummyEndPoint(listenSocket);
count = listenSocket.EndReceiveFrom(result, ref dummy);
}
}
if (count > 0)
{
data = FramingCodec.Decode(new ArraySegment <byte>(buffer, 0, count));
}
}
catch (Exception e)
{
Debug.WriteLine("Error in completing the async receive via EndReceiveFrom method.");
Debug.WriteLine(e.ToString());
}
finally
{
if (data == null)
{
this.bufferManager.ReturnBuffer(buffer);
buffer = null;
}
}
return(data);
}
