/** 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(); } }