/** Run method specified by runnable. */
public void run() {
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 the peer.
Datagram packet;
if (stack.threadPoolSize != -1) {
synchronized (((UDPMessageProcessor) messageProcessor).messageQueue) {
while (((UDPMessageProcessor) messageProcessor).messageQueue.isEmpty()) {
// Check to see if we need to exit.
if (!((UDPMessageProcessor) messageProcessor).running) return;
try {
// Wait for packets
((UDPMessageProcessor) messageProcessor).messageQueue.wait();
} catch (InterruptedException ex) {
if (!((UDPMessageProcessor) messageProcessor).running) return;
}
}
packet = (Datagram) ((UDPMessageProcessor) messageProcessor).messageQueue.firstElement();
((UDPMessageProcessor) messageProcessor).messageQueue.removeElementAt(0);
}
incomingPacket = packet;
} else {
packet = incomingPacket;
}
if (LogWriter.needsLogging) {
LogWriter.logMessage(
LogWriter.TRACE_DEBUG, "Processing new incoming datagram " + packet.getLength());
}
// Process the packet. Catch and log any exception we may throw.
try {
processIncomingDataPacket(packet);
} catch (Throwable e) {
if (LogWriter.needsLogging) {
LogWriter.logMessage(
LogWriter.TRACE_EXCEPTION, "Exception processing incoming UDP packet");
LogWriter.logException((Exception) e);
}
}
if (stack.threadPoolSize == -1) {
return;
}
}
}
/**
* Process an incoming datagram
*
* @param packet is the incoming datagram packet.
*/
private void processIncomingDataPacket(Datagram packet) throws Exception {
// For a request first via header tells where the message
// is coming from.
// For response, just get the port from the packet.
// format: address:port
String address = packet.getAddress();
try {
int firstColon = address.indexOf("//");
int secondColon = address.indexOf(":", firstColon + 1);
this.peerAddress = address.substring(firstColon + 2, secondColon);
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG, "UDPMessageChannel, run(), sender address:" + peerAddress);
String senderPortString = address.substring(address.indexOf(";") + 1, address.indexOf("|"));
this.peerPacketSourcePort = Integer.parseInt(senderPortString);
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG, "UDPMessageChannel, run(), sender port:" + peerPacketSourcePort);
} catch (NumberFormatException e) {
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_EXCEPTION,
"UDPMessageChannel, run(), exception raised: " + e.getMessage());
e.printStackTrace();
peerPacketSourcePort = -1;
}
int packetLength = packet.getLength();
// Read bytes and put it in a queue.
byte[] msgBytes = packet.getData();
// Do debug logging.
if (LogWriter.needsLogging) {
LogWriter.logMessage(
LogWriter.TRACE_DEBUG,
"UDPMessageChannel: processIncomingDataPacket : peerAddress = "
+ peerAddress
+ "/"
+ peerPacketSourcePort
+ " Length = "
+ packetLength
+ " msgBytes "
+ msgBytes);
}
Message sipMessage = null;
try {
receptionTime = System.currentTimeMillis();
sipMessage = myParser.parseSIPMessage(msgBytes);
myParser = null;
} catch (ParseException ex) {
myParser = null; // let go of the parser reference.
if (LogWriter.needsLogging) {
LogWriter.logMessage(LogWriter.TRACE_DEBUG, "Rejecting message ! " + new String(msgBytes));
LogWriter.logMessage(LogWriter.TRACE_DEBUG, "error message " + ex.getMessage());
LogWriter.logException(ex);
}
// TODO: do this on TCP too
// JvB: send a 400 response for requests (except ACK)
String msgString = new String(msgBytes, 0, packetLength);
if (!msgString.startsWith("SIP/") && !msgString.startsWith("ACK ")) {
String badReqRes = create400Response(msgString, ex);
if (badReqRes != null) {
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG, "Sending automatic 400 Bad Request: " + badReqRes);
try {
this.sendMessage(badReqRes.getBytes(), peerAddress, peerPacketSourcePort, "UDP", false);
} catch (IOException e) {
LogWriter.logException(e);
}
} else {
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG, "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 (LogWriter.needsLogging)
LogWriter.logMessage(LogWriter.TRACE_DEBUG, "Rejecting message ! + Null message parsed.");
return;
}
ViaList viaList = sipMessage.getViaHeaders();
// Check for the required headers.
if (sipMessage.getFromHeader() == null
||
// sipMessage.getFromHeader().getTag() == null ||
sipMessage.getTo() == null
|| sipMessage.getCallId() == null
|| sipMessage.getCSeqHeader() == null
|| sipMessage.getViaHeaders() == null) {
String badmsg = new String(msgBytes);
if (LogWriter.needsLogging) {
LogWriter.logMessage("bad message " + badmsg);
LogWriter.logMessage(
">>> Dropped Bad Msg "
+ "FromHeader = "
+ sipMessage.getFromHeader()
+ "ToHeader = "
+ sipMessage.getTo()
+ "CallId = "
+ sipMessage.getCallId()
+ "CSeqHeader = "
+ sipMessage.getCSeqHeader()
+ "Via = "
+ sipMessage.getViaHeaders());
}
stack.logBadMessage(badmsg);
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 Request) {
ViaHeader v = (ViaHeader) viaList.first();
if (v.hasPort()) this.peerPort = v.getPort();
else this.peerPort = SIPMessageStack.DEFAULT_PORT;
this.peerProtocol = v.getTransport();
boolean hasRPort = v.hasParameter(ViaHeader.RPORT);
// Be warned, the host comparison may fail if socket.getAddress()
// returns a domain name as the Via Host will be a numeric IP.
// FIXME: No idea. Doing a DNS lookup or reverse DNS lookup
// can be misleading because they can be non-matching, that is,
// DNS(peerAddressName) != ReverseDNS(peerAddressIP)
if (hasRPort || !this.peerAddress.equals(v.getHost())) {
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_MESSAGES,
"WARNING! \"Received\" parameter "
+ "has been temporarily disabled. Response will be sent to topmost Via Host: "
+ v.getHost());
this.peerAddress = v.getHost();
// if (LogWriter.needsLogging)
// LogWriter.logMessage(LogWriter.TRACE_MESSAGES, "Adding \"received\"
// parameter" +
// " to incoming request with value: " + peerAddress +
// " because it doesn't match the Via host " + v.getHost());
// v.setParameter(ViaHeader.RECEIVED, this.peerAddress);
}
if (hasRPort) {
v.setParameter(ViaHeader.RPORT, Integer.toString(peerPacketSourcePort));
this.peerPort = peerPacketSourcePort;
}
} else {
this.peerPort = this.peerPacketSourcePort;
this.peerProtocol = ((ViaHeader) viaList.getFirst()).getTransport();
}
processMessage(sipMessage);
}