public void WriteToBuffer(Brunet.Util.ICopyable p) {
int plength = p.CopyTo(_buffer, _written + 2);
if( plength > Int16.MaxValue ) {
throw new EdgeException(true,
String.Format("Packet too long: {0}",plength));
}
//
//The length at the beginning:
Brunet.Util.NumberSerializer.WriteShort((short)plength, _buffer, _written);
//Also write the length at the end so we can detect a bad packet
//as we have seen on planetlab:
Brunet.Util.NumberSerializer.WriteShort((short)plength, _buffer, _written + 2 + plength);
//If the buffer did not fill up, we have not yet thrown an exception:
_written += (plength + 4);
}
public void HandleEdgeSend(Edge from, ICopyable p)
{
TcpEdge sender = (TcpEdge)from;
try {
bool flushed = true;
lock ( sender ) {
//Try to fill up the buffer:
sender.WriteToBuffer(p);
//Okay, we loaded the whole packet into the TcpEdge's buffer
//now it is time to try to flush the buffer:
flushed = sender.Flush();
}
if (!flushed)
{
/*
* We should remember to try again when the socket is
* writable
*/
ActionQueue.Enqueue(new SendWaitAction(sender.Socket));
}
}
catch (EdgeException ex) {
if (false == ex.IsTransient)
{
//Go ahead and forget about this socket.
RequestClose(from);
ActionQueue.Enqueue(new CloseAction(sender, null));
}
//Rethrow the exception
throw;
}
catch (Exception x) {
//Assume any other error is transient:
throw new EdgeException(true, String.Format("Could not send on: {0}", from), x);
}
}