/** Run method specified by runnnable. */
public void run() {
// Assume no thread pooling (bug fix by spierhj)
ThreadAuditor.ThreadHandle threadHandle = null;
while (true) {
// Create a new string message parser to parse the list of messages.
if (myParser == null) {
myParser = new StringMsgParser();
myParser.setParseExceptionListener(this);
}
// messages that we write out to him.
DatagramPacket packet;
if (sipStack.threadPoolSize != -1) {
synchronized (((UDPMessageProcessor) messageProcessor).messageQueue) {
while (((UDPMessageProcessor) messageProcessor).messageQueue.isEmpty()) {
// Check to see if we need to exit.
if (!((UDPMessageProcessor) messageProcessor).isRunning) return;
try {
// We're part of a thread pool. Ask the auditor to
// monitor this thread.
if (threadHandle == null) {
threadHandle = sipStack.getThreadAuditor().addCurrentThread();
}
// Send a heartbeat to the thread auditor
threadHandle.ping();
// Wait for packets
// Note: getPingInterval returns 0 (infinite) if the
// thread auditor is disabled.
((UDPMessageProcessor) messageProcessor)
.messageQueue.wait(threadHandle.getPingIntervalInMillisecs());
} catch (InterruptedException ex) {
if (!((UDPMessageProcessor) messageProcessor).isRunning) return;
}
}
packet =
(DatagramPacket) ((UDPMessageProcessor) messageProcessor).messageQueue.removeFirst();
}
this.incomingPacket = packet;
} else {
packet = this.incomingPacket;
}
// Process the packet. Catch and log any exception we may throw.
try {
processIncomingDataPacket(packet);
} catch (Exception e) {
sipStack.logWriter.logError("Error while processing incoming UDP packet", e);
}
if (sipStack.threadPoolSize == -1) {
return;
}
}
}
/**
* This is input reading thread for the pipelined parser. You feed it input through the input
* stream (see the constructor) and it calls back an event listener interface for message
* processing or error. It cleans up the input - dealing with things like line continuation
*/
public void run() {
Pipeline inputStream = this.rawInputStream;
// inputStream = new MyFilterInputStream(this.rawInputStream);
// I cannot use buffered reader here because we may need to switch
// encodings to read the message body.
try {
while (true) {
this.sizeCounter = this.maxMessageSize;
// this.messageSize = 0;
StringBuffer inputBuffer = new StringBuffer();
if (Debug.parserDebug) Debug.println("Starting parse!");
String line1;
String line2 = null;
while (true) {
try {
line1 = readLine(inputStream);
// ignore blank lines.
if (line1.equals("\n")) {
if (Debug.parserDebug) Debug.println("Discarding " + line1);
continue;
} else break;
} catch (IOException ex) {
Debug.printStackTrace(ex);
this.rawInputStream.stopTimer();
return;
}
}
inputBuffer.append(line1);
// Guard against bad guys.
this.rawInputStream.startTimer();
while (true) {
try {
line2 = readLine(inputStream);
inputBuffer.append(line2);
if (line2.trim().equals("")) break;
} catch (IOException ex) {
this.rawInputStream.stopTimer();
Debug.printStackTrace(ex);
return;
}
}
// Stop the timer that will kill the read.
this.rawInputStream.stopTimer();
inputBuffer.append(line2);
StringMsgParser smp = new StringMsgParser(sipMessageListener);
smp.readBody = false;
SIPMessage sipMessage = null;
try {
sipMessage = smp.parseSIPMessage(inputBuffer.toString());
if (sipMessage == null) {
this.rawInputStream.stopTimer();
continue;
}
} catch (ParseException ex) {
// Just ignore the parse exception.
continue;
}
if (Debug.parserDebug) Debug.println("Completed parsing message");
ContentLength cl = (ContentLength) sipMessage.getContentLength();
int contentLength = 0;
if (cl != null) {
contentLength = cl.getContentLength();
} else {
contentLength = 0;
}
if (Debug.parserDebug) {
Debug.println("contentLength " + contentLength);
Debug.println("sizeCounter " + this.sizeCounter);
Debug.println("maxMessageSize " + this.maxMessageSize);
}
if (contentLength == 0) {
sipMessage.removeContent();
} else if (maxMessageSize == 0 || contentLength < this.sizeCounter) {
byte[] message_body = new byte[contentLength];
int nread = 0;
while (nread < contentLength) {
// Start my starvation timer.
// This ensures that the other end
// writes at least some data in
// or we will close the pipe from
// him. This prevents DOS attack
// that takes up all our connections.
this.rawInputStream.startTimer();
try {
int readlength = inputStream.read(message_body, nread, contentLength - nread);
if (readlength > 0) {
nread += readlength;
} else {
break;
}
} catch (IOException ex) {
ex.printStackTrace();
break;
} finally {
// Stop my starvation timer.
this.rawInputStream.stopTimer();
}
}
sipMessage.setMessageContent(message_body);
}
// Content length too large - process the message and
// return error from there.
if (sipMessageListener != null) {
try {
sipMessageListener.processMessage(sipMessage);
} catch (Exception ex) {
// fatal error in processing - close the
// connection.
break;
}
}
}
} finally {
try {
inputStream.close();
} catch (IOException e) {
InternalErrorHandler.handleException(e);
}
}
}
/**
* Process an incoming datagram
*
* @param packet is the incoming datagram packet.
*/
private void processIncomingDataPacket(DatagramPacket packet) throws Exception {
this.peerAddress = packet.getAddress();
int packetLength = packet.getLength();
// Read bytes and put it in a eueue.
byte[] bytes = packet.getData();
byte[] msgBytes = new byte[packetLength];
System.arraycopy(bytes, 0, msgBytes, 0, packetLength);
// Do debug logging.
if (sipStack.isLoggingEnabled()) {
this.sipStack.logWriter.logDebug(
"UDPMessageChannel: processIncomingDataPacket : peerAddress = "
+ peerAddress.getHostAddress()
+ "/"
+ packet.getPort()
+ " Length = "
+ packetLength);
}
SIPMessage sipMessage = null;
try {
this.receptionTime = System.currentTimeMillis();
sipMessage = myParser.parseSIPMessage(msgBytes);
myParser = null;
} catch (ParseException ex) {
myParser = null; // let go of the parser reference.
if (sipStack.isLoggingEnabled()) {
this.sipStack.logWriter.logDebug("Rejecting message ! " + new String(msgBytes));
this.sipStack.logWriter.logDebug("error message " + ex.getMessage());
this.sipStack.logWriter.logException(ex);
}
// JvB: send a 400 response for requests (except ACK)
// Currently only UDP, @todo also other transports
String msgString = new String(msgBytes, 0, packetLength);
if (!msgString.startsWith("SIP/") && !msgString.startsWith("ACK ")) {
String badReqRes = createBadReqRes(msgString, ex);
if (badReqRes != null) {
if (sipStack.isLoggingEnabled()) {
sipStack.getLogWriter().logDebug("Sending automatic 400 Bad Request:");
sipStack.getLogWriter().logDebug(badReqRes);
}
try {
this.sendMessage(badReqRes.getBytes(), peerAddress, packet.getPort(), "UDP", false);
} catch (IOException e) {
this.sipStack.logWriter.logException(e);
}
} else {
if (sipStack.isLoggingEnabled()) {
sipStack.getLogWriter().logDebug("Could not formulate automatic 400 Bad Request");
}
}
}
return;
}
// No parse exception but null message - reject it and
// march on (or return).
// exit this message processor if the message did not parse.
if (sipMessage == null) {
if (sipStack.isLoggingEnabled()) {
this.sipStack.logWriter.logDebug("Rejecting message ! + Null message parsed.");
}
return;
}
ViaList viaList = sipMessage.getViaHeaders();
// Check for the required headers.
if (sipMessage.getFrom() == null
|| sipMessage.getTo() == null
|| sipMessage.getCallId() == null
|| sipMessage.getCSeq() == null
|| sipMessage.getViaHeaders() == null) {
String badmsg = new String(msgBytes);
if (sipStack.isLoggingEnabled()) {
this.sipStack.logWriter.logError("bad message " + badmsg);
this.sipStack.logWriter.logError(
">>> Dropped Bad Msg "
+ "From = "
+ sipMessage.getFrom()
+ "To = "
+ sipMessage.getTo()
+ "CallId = "
+ sipMessage.getCallId()
+ "CSeq = "
+ sipMessage.getCSeq()
+ "Via = "
+ sipMessage.getViaHeaders());
}
sipStack.logWriter.logError("BAD MESSAGE!");
return;
}
// For a request first via header tells where the message
// is coming from.
// For response, just get the port from the packet.
if (sipMessage instanceof SIPRequest) {
Via v = (Via) viaList.getFirst();
Hop hop = sipStack.addressResolver.resolveAddress(v.getHop());
this.peerPort = hop.getPort();
this.peerProtocol = v.getTransport();
this.peerPacketSourceAddress = packet.getAddress();
this.peerPacketSourcePort = packet.getPort();
try {
this.peerAddress = packet.getAddress();
// Check to see if the received parameter matches
// the peer address and tag it appropriately.
boolean hasRPort = v.hasParameter(Via.RPORT);
if (hasRPort || !hop.getHost().equals(this.peerAddress.getHostAddress())) {
v.setParameter(Via.RECEIVED, this.peerAddress.getHostAddress());
}
if (hasRPort) {
v.setParameter(Via.RPORT, Integer.toString(this.peerPacketSourcePort));
}
} catch (java.text.ParseException ex1) {
InternalErrorHandler.handleException(ex1);
}
} else {
this.peerPacketSourceAddress = packet.getAddress();
this.peerPacketSourcePort = packet.getPort();
this.peerAddress = packet.getAddress();
this.peerPort = packet.getPort();
this.peerProtocol = ((Via) viaList.getFirst()).getTransport();
}
this.processMessage(sipMessage);
}