/**
* a DatagramChannel has data ready - process all the pending packets, whether its for a
* rdpserversocket or rdpconnection.
*/
void processActiveChannel(DatagramChannel dc) throws ClosedChannelException {
RDPPacket packet;
int count = 0;
// read in the packet
try {
Set<RDPConnection> needsAckConnections = new HashSet<RDPConnection>();
while ((packet = RDPServer.receivePacket(dc)) != null) {
if (Log.loggingNet)
Log.net(
"RDPServer.processActiveChannel: Starting iteration with count of "
+ count
+ " packets");
// see if there is a connection already for this packet
InetAddress remoteAddr = packet.getInetAddress();
int remotePort = packet.getPort();
int localPort = dc.socket().getLocalPort();
ConnectionInfo conInfo = new ConnectionInfo(remoteAddr, remotePort, localPort);
RDPConnection con = RDPServer.getConnection(dc, conInfo);
if (con != null) {
if (Log.loggingNet)
Log.net("RDPServer.processActiveChannel: found an existing connection: " + con);
count++;
if (processExistingConnection(con, packet)) needsAckConnections.add(con);
// Prevent this from blocking getActiveChannels by
// putting an upper bound on the number of packets
// processed
if (count >= 20) break;
continue;
} else {
Log.net("RDPServer.processActiveChannel: did not find an existing connection");
}
// there is no connection,
// see if there is a socket listening for new connection
RDPServerSocket rdpSocket = RDPServer.getRDPSocket(dc);
if (rdpSocket != null) {
count++;
processNewConnection(rdpSocket, packet);
return;
}
return;
}
// Finally, send out the acks
for (RDPConnection con : needsAckConnections) {
RDPPacket replyPacket = new RDPPacket(con);
con.sendPacketImmediate(replyPacket, false);
}
} catch (ClosedChannelException ex) {
Log.error("RDPServer.processActiveChannel: ClosedChannel " + dc.socket());
throw ex;
} finally {
if (Log.loggingNet)
Log.net("RDPServer.processActiveChannel: Returning after processing " + count + " packets");
}
}
