public void run() {
while (true) {
LinkedList<PacketCallbackStruct> list = null;
try {
queuedPacketCallbacksLock.lock();
try {
queuedPacketCallbacksNotEmpty.await();
} catch (Exception e) {
Log.error(
"RDPServer.PacketCallbackThread: queuedPacketCallbacksNotEmpty.await() caught exception "
+ e.getMessage());
}
list = queuedPacketCallbacks;
queuedPacketCallbacks = new LinkedList<PacketCallbackStruct>();
} finally {
queuedPacketCallbacksLock.unlock();
}
if (Log.loggingNet)
Log.net("RDPServer.PacketCallbackThread: Got " + list.size() + " queued packets");
for (PacketCallbackStruct pcs : list) {
try {
callbackProcessPacket(pcs.cb, pcs.con, pcs.packet);
} catch (Exception e) {
Log.exception("RDPServer.PacketCallbackThread: ", e);
}
}
}
}
/** make sure the packet as the remote address and remote port set */
static void sendPacket(DatagramChannel dc, RDPPacket packet) {
sendMeter.add();
// allocate a buffer
int bufSize = 100 + (packet.numEacks() * 4);
if (packet.getData() != null) {
bufSize += packet.getData().length;
sendDataMeter.add();
}
MVByteBuffer buf = new MVByteBuffer(bufSize);
packet.toByteBuffer(buf); // function flips the buffer
int remotePort = packet.getPort();
InetAddress remoteAddr = packet.getInetAddress();
if ((remotePort < 0) || (remoteAddr == null)) {
throw new MVRuntimeException("RDPServer.sendPacket: remotePort or addr is null");
}
try {
int bytes = dc.send(buf.getNioBuf(), new InetSocketAddress(remoteAddr, remotePort));
if (bytes == 0) {
Log.error("RDPServer.sendPacket: could not send packet, size=" + bufSize);
}
if (Log.loggingNet)
Log.net(
"RDPServer.sendPacket: remoteAddr="
+ remoteAddr
+ ", remotePort="
+ remotePort
+ ", numbytes sent="
+ bytes);
} catch (java.io.IOException e) {
Log.exception(
"RDPServer.sendPacket: remoteAddr="
+ remoteAddr
+ ", remotePort="
+ remotePort
+ ", got exception",
e);
throw new MVRuntimeException("RDPServer.sendPacket", e);
}
}
public static void startRDPServer() {
if (rdpServerStarted) return;
rdpServerStarted = true;
rdpServerThread = new Thread(rdpServer, "RDPServer");
retryThread = new Thread(new RetryThread(), "RDPRetry");
packetCallbackThread = new Thread(new PacketCallbackThread(), "RDPCallback");
if (Log.loggingNet) Log.net("static - starting rdpserver thread");
try {
selector = Selector.open();
} catch (Exception e) {
Log.exception("RDPServer caught exception opening selector", e);
System.exit(1);
}
rdpServerThread.setPriority(rdpServerThread.getPriority() + 2);
if (Log.loggingDebug)
Log.debug(
"RDPServer: starting rdpServerThread with priority " + rdpServerThread.getPriority());
rdpServerThread.start();
retryThread.start();
packetCallbackThread.start();
}
/** starts the server listens to incoming packets */
public void run() {
try {
while (true) {
if (Log.loggingNet) Log.net("In RDPServer.run: starting new iteration");
try {
Set<DatagramChannel> activeChannels = getActiveChannels();
activeChannelCalls++;
Iterator<DatagramChannel> iter = activeChannels.iterator();
while (iter.hasNext()) {
DatagramChannel dc = iter.next();
if (Log.loggingNet) Log.net("In RDPServer.run: about to call processActiveChannel");
processActiveChannel(dc);
if (Log.loggingNet) Log.net("In RDPServer.run: returned from processActiveChannel");
}
} catch (ClosedChannelException ex) {
// ignore
} catch (Exception e) {
Log.exception("RDPServer.run caught exception", e);
}
}
} finally {
Log.warn("RDPServer.run: thread exiting");
}
}
public void run() {
// every second, go through all the packets that havent been
// ack'd
List<RDPConnection> conList = new LinkedList<RDPConnection>();
long lastCounterTime = System.currentTimeMillis();
while (true) {
try {
long startTime = System.currentTimeMillis();
long interval = startTime - lastCounterTime;
if (interval > 1000) {
if (Log.loggingNet) {
Log.net(
"RDPServer counters: activeChannelCalls "
+ activeChannelCalls
+ ", selectCalls "
+ selectCalls
+ ", transmits "
+ transmits
+ ", retransmits "
+ retransmits
+ " in "
+ interval
+ "ms");
}
activeChannelCalls = 0;
selectCalls = 0;
transmits = 0;
retransmits = 0;
lastCounterTime = startTime;
}
if (Log.loggingNet) Log.net("RDPServer.RETRY: startTime=" + startTime);
// go through all the rdpconnections and re-send any
// unacked packets
conList.clear();
lock.lock();
try {
// make a copy since the values() collection is
// backed by the map
Set<RDPConnection> conCol = RDPServer.getAllConnections();
if (conCol == null) {
throw new MVRuntimeException("values() returned null");
}
conList.addAll(conCol); // make non map backed copy
} finally {
lock.unlock();
}
Iterator<RDPConnection> iter = conList.iterator();
while (iter.hasNext()) {
RDPConnection con = iter.next();
long currentTime = System.currentTimeMillis();
// is the connection in CLOSE_WAIT
if (con.getState() == RDPConnection.CLOSE_WAIT) {
long closeTime = con.getCloseWaitTimer();
long elapsedTime = currentTime - closeTime;
Log.net(
"RDPRetryThread: con is in CLOSE_WAIT: elapsed close timer(ms)="
+ elapsedTime
+ ", waiting for 30seconds to elapse. con="
+ con);
if (elapsedTime > 30000) {
// close the connection
Log.net("RDPRetryThread: removing CLOSE_WAIT connection. con=" + con);
removeConnection(con);
} else {
Log.net(
"RDPRetryThread: time left on CLOSE_WAIT timer: "
+ (30000 - (currentTime - closeTime)));
}
// con.close();
continue;
}
if (Log.loggingNet)
Log.net(
"RDPServer.RETRY: resending expired packets "
+ con
+ " - current list size = "
+ con.unackListSize());
// see if we should send a null packet, but only if con is already open
if ((con.getState() == RDPConnection.OPEN)
&& ((currentTime - con.getLastNullPacketTime()) > 30000)) {
con.getLock().lock();
try {
RDPPacket nulPacket = RDPPacket.makeNulPacket();
con.sendPacketImmediate(nulPacket, false);
con.setLastNullPacketTime();
if (Log.loggingNet) Log.net("RDPServer.retry: sent nul packet: " + nulPacket);
} finally {
con.getLock().unlock();
}
} else {
if (Log.loggingNet)
Log.net(
"RDPServer.retry: sending nul packet in "
+ (30000 - (currentTime - con.getLastNullPacketTime())));
}
con.resend(
currentTime - resendTimerMS, // resend cutoff time
currentTime - resendTimeoutMS); // giveup time
}
long endTime = System.currentTimeMillis();
if (Log.loggingNet)
Log.net(
"RDPServer.RETRY: endTime=" + endTime + ", elapse(ms)=" + (endTime - startTime));
Thread.sleep(250);
} catch (Exception e) {
Log.exception("RDPServer.RetryThread.run caught exception", e);
}
}
}