private bool receiveTcpMessages()
{
bool received = false;
IList <TcpConnectionState> tcpConnectionStatesToBeDeleted = new LinkedList <TcpConnectionState>();
foreach (TcpConnectionState tcpConnectionState in tcpConnectionStates)
{
if (log.TraceEnabled)
{
log.trace(string.Format("receiveTcpMessages polling {0}", tcpConnectionState));
}
if (tcpConnectionState.pendingConnection)
{
try
{
tcpConnectionState.connect();
SocketChannel socketChannel = tcpConnectionState.socketChannel;
if (socketChannel != null && socketChannel.finishConnect())
{
tcpConnectionState.sourceSequenceNumber++;
// Send SYN-ACK acknowledge
sendAcknowledgeTCP(tcpConnectionState, true);
tcpConnectionState.destinationSequenceNumber++;
tcpConnectionState.pendingConnection = false;
}
}
catch (IOException e)
{
// connect failed, do not send any TCP SYN-ACK, forget the connection state
tcpConnectionStatesToBeDeleted.Add(tcpConnectionState);
//if (log.DebugEnabled)
{
Console.WriteLine(string.Format("Pending TCP connection {0} failed: {1}", tcpConnectionState, e.ToString()));
}
}
}
try
{
if (!tcpConnectionState.pendingConnection)
{
// Write any pending data
sbyte[] pendingWriteData = tcpConnectionState.pendingWriteData;
if (pendingWriteData != null)
{
tcpConnectionState.pendingWriteData = null;
//if (log.DebugEnabled)
{
Console.WriteLine(string.Format("receiveTcpMessages sending pending write data: {0}", Utilities.getMemoryDump(pendingWriteData)));
}
tcpConnectionState.write(pendingWriteData);
}
// Receive any available data
sbyte[] receivedData = tcpConnectionState.read();
if (receivedData != null)
{
received = true;
sendTcpData(tcpConnectionState, receivedData);
}
}
}
catch (IOException e)
{
// Ignore exceptions
Console.WriteLine("receiveTcpMessages", e);
}
}
//JAVA TO C# CONVERTER TODO TASK: There is no .NET equivalent to the java.util.Collection 'removeAll' method:
tcpConnectionStates.removeAll(tcpConnectionStatesToBeDeleted);
return(received);
}