//inserts information needed for async receive.
//I could pass the asynceventargs instead of sd but for now
//im leaving it at sd for clarification
internal void StartReceive()
{
//if connection is closed
if (SocketActions.IsConnectionClosed(_socket))
{
SocketActions.ProcessError(this, "StartReceive: connection closed");
return;
}
//determine if there is data to be read.
byte[] data = RetrieveReceived();
if (data != null)
{
//let handlereceived decide what to do with the data
SocketActions.HandleReceived(this, data);
//exit method since we dont need to set a completion event as we already
//know there is data
return;
}
try
{
SocketAsyncEventArgs eventArgs = new SocketAsyncEventArgs();
byte[] buffer = new byte[512]; //255 //r/
eventArgs.SetBuffer(buffer, 0, 512);
eventArgs.UserToken = _socket;
eventArgs.Completed += new EventHandler <SocketAsyncEventArgs>(DataReceived);
_socket.ReceiveAsync(eventArgs);
}
catch
{
SocketActions.ProcessError(this, "StartReceive: catch");
}
}
internal void DataReceived(object sender, SocketAsyncEventArgs e)
{
byte[] data = RetrieveReceived(e);
if (data != null)
{
SocketActions.HandleReceived(this, data);
}
//null array or 0 bytes means graceful socket close
else
{
//SocketActions.ProcessError(this, "DataReceived: null data");
}
}