/**
* there is a socket listening on the port for this packet. process if it is a new connection rdp
* packet
*/
public void processNewConnection(RDPServerSocket serverSocket, RDPPacket packet) {
if (Log.loggingNet)
Log.net(
"processNewConnection: RDPPACKET (localport=" + serverSocket.getPort() + "): " + packet);
// int localPort = serverSocket.getPort();
InetAddress remoteAddr = packet.getInetAddress();
int remotePort = packet.getPort();
if (!packet.isSyn()) {
// the client is not attemping to start a new connection
// send a reset and forget about it
Log.debug("socket got non-syn packet, replying with reset: packet=" + packet);
RDPPacket rstPacket = RDPPacket.makeRstPacket();
rstPacket.setPort(remotePort);
rstPacket.setInetAddress(remoteAddr);
RDPServer.sendPacket(serverSocket.getDatagramChannel(), rstPacket);
return;
}
// it is a syn packet, lets make a new connection for it
RDPConnection con = new RDPConnection();
DatagramChannel dc = serverSocket.getDatagramChannel();
con.initConnection(dc, packet);
// add new connection to allConnectionMap
registerConnection(con, dc);
// ack it with a syn
RDPPacket synPacket = RDPPacket.makeSynPacket(con);
con.sendPacketImmediate(synPacket, false);
}
/** reads in an rdp packet from the datagram channel - blocking call */
static RDPPacket receivePacket(DatagramChannel dc) throws ClosedChannelException {
try {
if (dc == null) {
throw new MVRuntimeException("RDPServer.receivePacket: datagramChannel is null");
}
// get a packet from the reader
staticMVBuff.rewind();
InetSocketAddress addr = (InetSocketAddress) dc.receive(staticMVBuff.getNioBuf());
if (addr == null) {
return null;
}
RDPPacket packet = new RDPPacket();
packet.setPort(addr.getPort());
packet.setInetAddress(addr.getAddress());
packet.parse(staticMVBuff);
return packet;
} catch (ClosedChannelException ex) {
throw ex;
} catch (Exception e) {
throw new MVRuntimeException("error", e);
}
}