/** rdpserversocket wants to bind on a local port */
static DatagramChannel bind(Integer port, int receiveBufferSize)
throws java.net.BindException, java.io.IOException, java.net.SocketException {
lock.lock();
try {
// see if there is an existing datagramchannel bound to this port
DatagramChannel dc = channelMap.get(port);
if (dc != null) {
throw new java.net.BindException("RDPServer.bind: port is already used");
}
// make a new datagram channel
dc = DatagramChannel.open();
dc.configureBlocking(false);
dc.socket().setReceiveBufferSize(receiveBufferSize);
if (port == null) {
if (Log.loggingNet) Log.net("RDPServer.bind: binding to a random system port");
dc.socket().bind(null);
} else {
if (Log.loggingNet) Log.net("RDPServer.bind: binding to port " + port);
dc.socket().bind(new InetSocketAddress(port));
}
int resultingPort = dc.socket().getLocalPort();
if (Log.loggingNet) Log.net("RDPServer.bind: resulting port=" + resultingPort);
// add the channel to the channel map
channelMap.put(resultingPort, dc);
if (Log.loggingNet) Log.net("RDPServer.bind: added dc to channel map");
// add the channel to the newChannelsSet
// we want to register this channel with the selector
// but the selector thread needs to do that,
// so place it in this set, and wake up the selector
newChannelSet.add(dc);
if (Log.loggingNet) Log.net("RDPServer.bind: added dc to newChannelSet");
// in case the rdpserver was waiting while it had no sockets,
// signal it
channelMapNotEmpty.signal();
Log.net("RDPServer.bind: signalled channel map not empty condition");
// wakeup the selector -
// it needs to register the new channel with itself
selector.wakeup();
if (Log.loggingNet) Log.net("RDPServer.bind: woke up selector");
return dc;
} finally {
lock.unlock();
}
}
