/** Close the message channel. */
public void close() {
try {
if (LogWriter.needsLogging) LogWriter.logMessage("Closing message Channel " + this);
if (mySock != null) {
try {
String addr = mySock.getAddress();
int port = mySock.getPort();
stack.ioHandler.removeAndCloseSocket(stack.ioHandler.makeKey(addr, port));
} catch (IOException e) {
if (LogWriter.needsLogging) LogWriter.logMessage("Socket was already closed for " + this);
}
mySock = null;
} else {
if (LogWriter.needsLogging) LogWriter.logMessage("Socket was already null for " + this);
}
} catch (Exception ex) {
if (LogWriter.needsLogging) {
LogWriter.logMessage("Exception closing message Channel " + this);
LogWriter.logException(ex);
}
} finally {
this.isRunning = false;
uncache();
}
}
public void closeFromParser() {
try {
if (LogWriter.needsLogging)
LogWriter.logMessage("Closing message Channel " + this + " from Parser");
if (mySock != null) {
try {
String addr = mySock.getAddress();
int port = mySock.getPort();
stack.ioHandler.removeAndCloseSocket(stack.ioHandler.makeKey(addr, port));
} catch (IOException e) {
if (LogWriter.needsLogging) LogWriter.logMessage("Socket was already closed for " + this);
}
mySock = null;
} else {
if (LogWriter.needsLogging) LogWriter.logMessage("Socket was already null for " + this);
}
} catch (Exception ex) {
if (LogWriter.needsLogging && !stack.toExit) {
LogWriter.logMessage(
LogWriter.TRACE_EXCEPTION, "Exception closing message Channel " + this);
LogWriter.logException(ex);
}
} finally {
this.isRunning = false;
uncache();
this.tcpMessageProcessor.useCount--;
if (LogWriter.needsLogging)
LogWriter.logMessage("TCP Message Processor use count: " + tcpMessageProcessor.useCount);
}
}
/** 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;
}
}
}
/**
* This gets invoked when thread.start is called from the constructor. Implements a message loop -
* reading the tcp connection and processing messages until we are done or the other end has
* closed.
*/
public void run() {
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG,
"New TCP Message Channel Thread started " + this + " " + Thread.currentThread());
// Removed by ArnauVP: in MIDP it's not reliable to read in blocks
// from inputstreams; thus the Pipe was useless for byte-to-byte reads,
// and was giving sync problems when reading from the pipe (duplicate bytes).
// Create a pipeline to connect to our message parser.
// Pipeline hispipe = null;
// hispipe = new Pipeline(myClientInputStream, stack.readTimeout,
// ((SIPTransactionStack) stack).getTimer());
// Create a pipelined message parser to read from inputStream
// and parse SIP messages from the bytes.
myParser =
new PipelinedMsgParser(
this, myClientInputStream, this.messageProcessor.getMaximumMessageSize());
myParser.setMessageChannel(this);
// Start running the parser thread.
myParser.processInput();
// Changed by ArnauVP: using a buffer in some implementations of MIDP,
// the call to read(msg) would not return from until BUFFER_SIZE bytes were available,
// thus delaying the processing of the responses by the application and causing timeout.
// bug fix by Emmanuel Proulx
// int bufferSize = 4096;
this.tcpMessageProcessor.useCount++;
this.isRunning = true;
}
/**
* Constructor - gets called from the SIPMessageStack class with a socket on accepting a new
* client. All the processing of the message is done here with the stack being freed up to handle
* new connections. The sock input is the socket that is returned from the accept. Global data
* that is shared by all threads is accessible in the Server structure.
*
* @param sock Socket from which to read and write messages. The socket is already connected (was
* created as a result of an accept).
* @param sipStack the SIP Stack
* @param channelNotifier Notifier (optional) that gets called when the channel is opened or
* closed.
*/
protected TCPMessageChannel(
SocketConnection sock, SIPMessageStack sipStack, TCPMessageProcessor msgProcessor)
throws IOException {
stack = sipStack;
mySock = sock;
myAddress = sipStack.getHostAddress();
peerAddress = sock.getAddress();
myClientInputStream = sock.openInputStream();
myClientOutputStream = sock.openOutputStream();
if (LogWriter.needsLogging) {
LogWriter.logMessage("Creating new TCPMessageChannel " + this);
LogWriter.logMessage(
LogWriter.TRACE_DEBUG,
"Channel parameters: "
+ "stack: "
+ stack
+ "\n"
+ "processor: "
+ msgProcessor
+ "\n"
+ "localAddress: "
+ myAddress
+ "\n"
+ "peerAddress: "
+ peerAddress
+ "\n"
+ "IS "
+ myClientInputStream
+ " Socket "
+ mySock);
}
stack.ioHandler.putSocket(
stack.ioHandler.makeKey(mySock.getAddress(), mySock.getPort()),
mySock,
myClientOutputStream,
myClientInputStream);
mythread = new Thread(this, "TCPMessageChannel - incoming connection");
this.tcpMessageProcessor = msgProcessor;
this.myPort = this.tcpMessageProcessor.getPort();
// Bug report by Vishwashanti Raj Kadiayl
super.messageProcessor = msgProcessor;
mythread.start();
}
/**
* Constructor. We create one of these when we send out a message.
*
* @param targetAddr internet address of the place where we want to send messages.
* @param port target port (where we want to send the message).
* @param stack our SIP Stack.
*/
public UDPMessageChannel(
String targetAddr, int port, SIPMessageStack sipStack, UDPMessageProcessor processor) {
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG,
"DEBUG, UDPMessageChannel, UDPMessageChannel(),"
+ " Creating message channel on "
+ targetAddr
+ "/"
+ port);
stack = sipStack;
this.peerPort = port;
this.peerAddress = targetAddr;
this.messageProcessor = processor;
this.myPort = processor.getPort();
this.myAddress = sipStack.getHostAddress();
this.peerProtocol = "UDP";
}
/**
* Send a message to a specified receiver address.
*
* @param msg message string to send.
* @param receiverAddress Address of the place to send it to.
* @param receiverPort the port to send it to.
* @throws IOException If there is trouble sending this message.
*/
protected void sendMessage(
byte[] msg, String receiverAddress, int receiverPort, boolean reconnect) throws IOException {
// msg += "\r\n\r\n";
// Via is not included in the request so silently drop the reply.
if (receiverPort == -1) {
if (LogWriter.needsLogging)
LogWriter.logMessage(
"DEBUG, UDPMessageChannel, sendMessage(),"
+ " The message is not sent: the receiverPort=-1");
throw new IOException("Receiver port not set ");
}
try {
DatagramConnection socket;
boolean created = false;
if (stack.udpFlag) {
// Use the socket from the message processor (for firewall
// support use the same socket as the message processor
// socket -- feature request # 18 from java.net). This also
// makes the whole thing run faster!
socket = ((UDPMessageProcessor) messageProcessor).dc;
} else {
// bind to any interface and port.
// format: datagram://address:port
String url = "datagram://" + peerAddress + ":" + peerPort;
socket = (DatagramConnection) Connector.open(url);
created = true;
}
Datagram reply = socket.newDatagram(msg, msg.length);
socket.send(reply);
if (created) socket.close();
} catch (IOException ex) {
throw ex;
} catch (Exception ex) {
InternalErrorHandler.handleException(ex);
}
}
/**
* Constructor - connects to the given inet address. Acknowledgement -- Lamine Brahimi (IBM
* Zurich) sent in a bug fix for this method. A thread was being unnecessarily created.
*
* @param inetAddr inet address to connect to.
* @param sipStack is the sip stack from which we are created.
* @param messageProcessor to whom a parsed message is passed
* @throws IOException if we cannot connect.
*/
protected TCPMessageChannel(
String inetAddr, int port, SIPMessageStack sipStack, TCPMessageProcessor messageProcessor)
throws IOException {
this.peerAddress = inetAddr;
this.peerPort = port;
this.myPort = messageProcessor.getPort();
this.peerProtocol = "TCP";
this.stack = sipStack;
this.tcpMessageProcessor = messageProcessor;
this.myAddress = sipStack.getHostAddress();
// Bug report by Vishwashanti Raj Kadiayl
super.messageProcessor = messageProcessor;
this.key = "TCP" + ":" + stack.ioHandler.makeKey(peerAddress, peerPort);
if (LogWriter.needsLogging)
LogWriter.logMessage(
"Created new TCP Message Channel "
+ this
+ " with key "
+ key
+ "\nprocessor: "
+ messageProcessor);
}
/**
* Gets invoked by the parser as a callback on successful message parsing (i.e. no parser errors).
*
* @param sipMessage Mesage to process (this calls the application for processing the message).
*/
public void processMessage(Message sipMessage) {
if (!stack.isAlive()) {
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG,
"MsgChannel " + this + " is dropping message as the stack is closing");
return; // drop messages when closing, avoid Exceptions
}
try {
if (LogWriter.needsLogging)
LogWriter.logMessage(
"[TCPMessageChannel]-> Processing incoming message: " + sipMessage.getFirstLine());
if (sipMessage.getFromHeader() == null
|| sipMessage.getTo() == null
|| sipMessage.getCallId() == null
|| sipMessage.getCSeqHeader() == null
|| sipMessage.getViaHeaders() == null) {
String badmsg = sipMessage.encode();
if (LogWriter.needsLogging) {
ServerLog.logMessage("bad message " + badmsg);
ServerLog.logMessage(">>> Dropped Bad Msg");
}
stack.logBadMessage(badmsg);
return;
}
ViaList viaList = sipMessage.getViaHeaders();
// For a request
// first via header tells where the message is coming from.
// For response, this has already been recorded in the outgoing
// message.
if (sipMessage instanceof Request) {
ViaHeader v = (ViaHeader) viaList.first();
if (v.hasPort()) {
viaPort = v.getPort();
} else {
viaPort = SIPMessageStack.DEFAULT_PORT;
}
this.peerProtocol = v.getTransport();
try {
if (peerPort == -1) peerPort = mySock.getPort();
this.peerAddress = mySock.getAddress();
// Log this because it happens when the remote host identifies
// as a FQDN but this is not resolvable to an IP by the OS.
// S40 doesn't have DNS settings, for instance, so if the APN
// is not able to resolve all the addresses of the SIP/IMS core,
// this problem will appear.
if (peerAddress == null && LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_EXCEPTION, "WARNING! Socket.getAddress() returned 'null'!!!");
// 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 (v.hasParameter(ViaHeader.RPORT) || !v.getHost().equals(this.peerAddress)) {
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 (v.hasParameter(ViaHeader.RPORT))
v.setParameter(ViaHeader.RPORT, Integer.toString(this.peerPort));
/*
* If socket is invalid, close it because it is useless and dangerous.
* Also if we ran out of slots for new sockets, as this could prevent
* incoming connections from being accepted.
*/
if (mySock.getAddress() == null
|| (stack.maxConnections != -1
&& tcpMessageProcessor.getNumConnections() >= stack.maxConnections)) {
stack.ioHandler.disposeSocket(mySock, myClientInputStream, myClientOutputStream);
mySock = null;
myClientInputStream = null;
myClientOutputStream = null;
if (stack.maxConnections != -1) {
synchronized (tcpMessageProcessor) {
tcpMessageProcessor.decreaseNumConnections();
tcpMessageProcessor.notify();
}
}
}
// reuse socket even for outgoing requests
else if (!this.isCached) {
((TCPMessageProcessor) this.messageProcessor).cacheMessageChannel(this);
String key = "TCP" + ":" + stack.ioHandler.makeKey(peerAddress, peerPort);
stack.ioHandler.putSocket(key, mySock, myClientOutputStream, myClientInputStream);
}
} catch (IOException e) {
e.printStackTrace();
}
}
// System.out.println("receiver address = " + receiverAddress);
// For each part of the request header, fetch it and process it
long receptionTime = System.currentTimeMillis();
if (sipMessage instanceof Request) {
// This is a request - process the request.
Request sipRequest = (Request) sipMessage;
// Create a new sever side request processor for this
// message and let it handle the rest.
if (LogWriter.needsLogging) {
LogWriter.logMessage("----Processing Message---");
}
// TODO: check maximum size of request
SIPServerRequestInterface sipServerRequest = stack.newSIPServerRequest(sipRequest, this);
if (sipServerRequest != null) {
try {
sipServerRequest.processRequest(sipRequest, this);
ServerLog.logMessage(
sipMessage,
sipRequest.getViaHost() + ":" + sipRequest.getViaPort(),
stack.getHostAddress() + ":" + stack.getPort(this.getTransport()),
false,
receptionTime);
} catch (SIPServerException ex) {
ServerLog.logMessage(
sipMessage,
sipRequest.getViaHost() + ":" + sipRequest.getViaPort(),
stack.getHostAddress() + ":" + stack.getPort(this.getTransport()),
ex.getMessage(),
false,
receptionTime);
handleException(ex);
}
} else {
if (LogWriter.needsLogging)
LogWriter.logMessage("Dropping request -- null sipServerRequest");
}
} else {
// This is a response message - process it.
Response sipResponse = (Response) sipMessage;
// TODO: check maximum size of the response
SIPServerResponseInterface sipServerResponse =
stack.newSIPServerResponse(sipResponse, this);
if (LogWriter.needsLogging)
LogWriter.logMessage("got a response interface " + sipServerResponse);
try {
// Responses with no ClienTransaction associated will not be processed
// as they may cause a NPE in the EventScanner thread.
if (sipServerResponse != null) sipServerResponse.processResponse(sipResponse, this);
else {
if (LogWriter.needsLogging) {
LogWriter.logMessage("null sipServerResponse!");
}
}
} catch (SIPServerException ex) {
// An error occured processing the message -- just log it.
ServerLog.logMessage(
sipMessage,
getPeerAddress().toString() + ":" + getPeerPort(),
stack.getHostAddress() + ":" + stack.getPort(this.getTransport()),
ex.getMessage(),
false,
receptionTime);
// Ignore errors while processing responses??
}
}
} catch (Exception ee) {
if (stack.isAlive()) {
throw new RuntimeException(ee.getClass() + ":" + ee.getMessage());
}
// else ignore exceptions
} finally {
// this.tcpMessageProcessor.useCount --;
}
}
/**
* Send message to whoever is connected to us. Uses the topmost via address to send to.
*
* @param message is the message to send.
*/
private void sendMessage(byte[] msg, boolean retry) throws IOException {
int portToUse;
if (viaPort != -1) portToUse = viaPort;
else portToUse = peerPort;
if (!this.isRunning && !this.isCached) {
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_MESSAGES,
"Tried to send message through a Message Channel that is no longer running. Create a new one.");
TCPMessageChannel newChannel =
(TCPMessageChannel)
this.tcpMessageProcessor.createMessageChannel(this.peerAddress, portToUse);
newChannel.sendMessage(msg, retry);
return;
}
SocketConnection sock =
stack.ioHandler.sendBytes(this.peerAddress, portToUse, this.peerProtocol, msg, retry);
/*Fix: don't replace the original socket (where the incoming
request came from) with the one created to send the response
to the port specified by the VIA header. This would cause a
NPE later, as the 'via socket' will be closed shortly after
sending the response. Thanks to Janos Vig (Genaker) for
detecting this. */
if (sock != null
&& (mySock == null || (sock != mySock && sock.getPort() == mySock.getPort()))) {
try {
if (mySock != null) {
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_MESSAGES,
"Closing socket on TCPMessageChannel and replacing with new one");
// Closing the IO streams will also stop the parser reading from them
if (myClientOutputStream != null) myClientOutputStream.close();
if (myClientInputStream != null) myClientInputStream.close();
mySock.close();
} else {
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG, "TCP Msg channel " + this + " socket was null!");
}
} catch (IOException ex) {
ex.printStackTrace();
}
// replace the old references of socket and IO streams
// to the ones pointing to the newly created socket.
mySock = sock;
myClientOutputStream = stack.ioHandler.getSocketOutputStream(mySock);
myClientInputStream = stack.ioHandler.getSocketInputStream(mySock);
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG,
"Creating new Thread from Message Channel "
+ this
+ " and new socket "
+ sock
+ " IS "
+ myClientInputStream);
Thread thread = new Thread(this);
thread.start();
}
}
/**
* Send a message to a specified receiver address.
*
* @param msg message string to send.
* @param receiverAddress Address of the place to send it to.
* @param receiverPort the port to send it to.
* @param receiverProtocol protocol to use to send.
* @param retry try if connection was not successful at fi
* @throws IOException If there is trouble sending this message.
*/
protected void sendMessage(
byte[] msg, String receiverAddress, int receiverPort, String receiverProtocol, boolean retry)
throws IOException {
if (LogWriter.needsLogging)
LogWriter.logMessage(
"Sending message to ["
+ receiverAddress
+ ":"
+ receiverPort
+ "/"
+ receiverProtocol
+ "]\n"
+ new String(msg)
+ " to be sent to ");
// msg += "\r\n\r\n";
// Via is not included in the request so silently drop the reply.
if (receiverPort == -1) {
if (LogWriter.needsLogging)
LogWriter.logMessage(
"DEBUG, UDPMessageChannel, sendMessage(),"
+ " The message is not sent: the receiverPort=-1");
throw new IOException("Receiver port not set ");
}
if (Utils.compareToIgnoreCase(receiverProtocol, "UDP") == 0) {
try {
DatagramConnection socket;
Datagram reply;
boolean created = false;
if (stack.udpFlag) {
// Use the socket from the message processor (for firewall
// support use the same socket as the message processor
// socket -- feature request # 18 from java.net). This also
// makes the whole thing run faster!
socket = ((UDPMessageProcessor) messageProcessor).dc;
// ArnauVP: this has the problem that the datagram created from this (inbound) connection
// doesn't have an address assigned. Let's do it.
reply = socket.newDatagram(msg, msg.length);
reply.setAddress("datagram://" + peerAddress + ":" + peerPort);
} else {
// bind to any interface and port.
// format: datagram://address:port
socket = stack.getNetworkLayer().createDatagramSocket(peerAddress, peerPort);
reply = socket.newDatagram(msg, msg.length);
created = true;
}
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG,
"UDPMessageChannel, sendMessage(),"
+ " Sending message over UDP, using socket "
+ socket
+ " created "
+ created
+ " destination "
+ reply.getAddress());
socket.send(reply);
if (created) socket.close();
} catch (IOException ex) {
throw ex;
} catch (Exception ex) {
InternalErrorHandler.handleException(ex);
}
} else {
// Use TCP to talk back to the sender.
SocketConnection outputSocket =
stack.ioHandler.sendBytes(peerAddress, peerPort, "tcp", msg, retry);
OutputStream myOutputStream = stack.ioHandler.getSocketOutputStream(outputSocket);
myOutputStream.write(msg, 0, msg.length);
myOutputStream.flush();
// The socket is cached (don't close it!);
}
}
/**
* Actually process the parsed SIP message.
*
* @param sipMessage
*/
public void processMessage(Message sipMessage) {
if (sipMessage instanceof Request) {
Request sipRequest = (Request) sipMessage;
// This is a request - process it.
SIPServerRequestInterface sipServerRequest = stack.newSIPServerRequest(sipRequest, this);
// Drop it if there is no request returned
if (sipServerRequest == null) {
if (LogWriter.needsLogging) {
LogWriter.logMessage("Null request interface returned");
}
return;
}
try {
if (LogWriter.needsLogging)
LogWriter.logMessage(
"About to process " + sipRequest.getFirstLine() + "/" + sipServerRequest);
sipServerRequest.processRequest(sipRequest, this);
if (LogWriter.needsLogging)
LogWriter.logMessage(
"Done processing " + sipRequest.getFirstLine() + "/" + sipServerRequest);
// So far so good -- we will commit this message if
// all processing is OK.
if (ServerLog.needsLogging(ServerLog.TRACE_MESSAGES)) {
if (sipServerRequest.getProcessingInfo() == null) {
ServerLog.logMessage(
sipMessage,
sipRequest.getViaHost() + ":" + sipRequest.getViaPort(),
stack.getHostAddress() + ":" + stack.getPort(this.getTransport()),
false,
new Long(receptionTime).toString());
} else {
ServerLog.logMessage(
sipMessage,
sipRequest.getViaHost() + ":" + sipRequest.getViaPort(),
stack.getHostAddress() + ":" + stack.getPort(this.getTransport()),
sipServerRequest.getProcessingInfo(),
false,
new Long(receptionTime).toString());
}
}
} catch (SIPServerException ex) {
if (ServerLog.needsLogging(ServerLog.TRACE_MESSAGES)) {
ServerLog.logMessage(
sipMessage,
sipRequest.getViaHost() + ":" + sipRequest.getViaPort(),
stack.getHostAddress() + ":" + stack.getPort(this.getTransport()),
ex.getMessage(),
false,
new Long(receptionTime).toString());
}
handleException(ex);
}
} else {
// Handle a SIP Response message.
Response sipResponse = (Response) sipMessage;
SIPServerResponseInterface sipServerResponse = stack.newSIPServerResponse(sipResponse, this);
try {
if (sipServerResponse != null) {
sipServerResponse.processResponse(sipResponse, this);
// Normal processing of message.
} else {
if (LogWriter.needsLogging) {
LogWriter.logMessage("null sipServerResponse!");
}
}
} catch (SIPServerException ex) {
if (ServerLog.needsLogging(ServerLog.TRACE_MESSAGES)) {
this.logResponse(sipResponse, receptionTime, ex.getMessage() + "-- Dropped!");
}
ServerLog.logException(ex);
}
}
}
/**
* 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);
}