/**
* Send a message to a specified receiver address.
*
* @param msg string to send.
* @param peerAddress Address of the place to send it to.
* @param peerPort the port to send it to.
* @throws IOException If there is trouble sending this message.
*/
protected void sendMessage(byte[] msg, InetAddress peerAddress, int peerPort, boolean reConnect)
throws IOException {
// Via is not included in the request so silently drop the reply.
if (sipStack.isLoggingEnabled() && this.sipStack.logStackTraceOnMessageSend) {
this.sipStack.logWriter.logStackTrace(LogWriter.TRACE_MESSAGES);
}
if (peerPort == -1) {
if (sipStack.isLoggingEnabled()) {
this.sipStack.logWriter.logDebug(getClass().getName() + ":sendMessage: Dropping reply!");
}
throw new IOException("Receiver port not set ");
} else {
if (sipStack.isLoggingEnabled()) {
this.sipStack.logWriter.logDebug(
getClass().getName()
+ ":sendMessage "
+ peerAddress.getHostAddress()
+ "/"
+ peerPort
+ "\n"
+ new String(msg));
this.sipStack.logWriter.logDebug("*******************\n");
}
}
DatagramPacket reply = new DatagramPacket(msg, msg.length, peerAddress, peerPort);
try {
DatagramSocket sock;
boolean created = false;
if (sipStack.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!
sock = ((UDPMessageProcessor) messageProcessor).sock;
// Bind the socket to the stack address in case there
// are multiple interfaces on the machine (feature reqeust
// by Will Scullin) 0 binds to an ephemeral port.
// sock = new DatagramSocket(0,sipStack.stackInetAddress);
} else {
// bind to any interface and port.
sock = new DatagramSocket();
created = true;
}
sock.send(reply);
if (created) sock.close();
} catch (IOException ex) {
throw ex;
} catch (Exception ex) {
InternalErrorHandler.handleException(ex);
}
}
/**
* Constructor. We create one of these when we send out a message.
*
* @param targetAddr INET address of the place where we want to send messages.
* @param port target port (where we want to send the message).
* @param sipStack our SIP Stack.
*/
protected UDPMessageChannel(
InetAddress targetAddr,
int port,
SIPTransactionStack sipStack,
UDPMessageProcessor messageProcessor) {
peerAddress = targetAddr;
peerPort = port;
peerProtocol = "UDP";
super.messageProcessor = messageProcessor;
this.myAddress = messageProcessor.getIpAddress().getHostAddress();
this.myPort = messageProcessor.getPort();
this.sipStack = sipStack;
if (sipStack.isLoggingEnabled()) {
this.sipStack.logWriter.logDebug(
"Creating message channel " + targetAddr.getHostAddress() + "/" + port);
}
}
/**
* Return a reply from a pre-constructed reply. This sends the message back to the entity who
* caused us to create this channel in the first place.
*
* @param sipMessage Message string to send.
* @throws IOException If there is a problem with sending the message.
*/
public void sendMessage(SIPMessage sipMessage) throws IOException {
if (sipStack.isLoggingEnabled() && this.sipStack.logStackTraceOnMessageSend) {
if (sipMessage instanceof SIPRequest && ((SIPRequest) sipMessage).getRequestLine() != null) {
/*
* We dont want to log empty trace messages.
*/
this.sipStack.logWriter.logStackTrace(LogWriter.TRACE_MESSAGES);
} else {
this.sipStack.logWriter.logStackTrace(LogWriter.TRACE_MESSAGES);
}
}
// Test and see where we are going to send the messsage. If the message
// is sent back to oursleves, just
// shortcircuit processing.
long time = System.currentTimeMillis();
try {
for (MessageProcessor messageProcessor : sipStack.getMessageProcessors()) {
if (messageProcessor.getIpAddress().equals(this.peerAddress)
&& messageProcessor.getPort() == this.peerPort
&& messageProcessor.getTransport().equals(this.peerProtocol)) {
MessageChannel messageChannel =
messageProcessor.createMessageChannel(this.peerAddress, this.peerPort);
if (messageChannel instanceof RawMessageChannel) {
((RawMessageChannel) messageChannel).processMessage(sipMessage);
sipStack.logWriter.logDebug("Self routing message");
return;
}
}
}
byte[] msg = sipMessage.encodeAsBytes(this.getTransport());
sendMessage(msg, peerAddress, peerPort, peerProtocol, sipMessage instanceof SIPRequest);
} catch (IOException ex) {
throw ex;
} catch (Exception ex) {
sipStack.logWriter.logError("An exception occured while sending message", ex);
throw new IOException("An exception occured while sending message");
} finally {
if (sipStack.logWriter.isLoggingEnabled(ServerLog.TRACE_MESSAGES))
logMessage(sipMessage, peerAddress, peerPort, time);
}
}
/**
* Implementation of the ParseExceptionListener interface.
*
* @param ex Exception that is given to us by the parser.
* @throws ParseException If we choose to reject the header or message.
*/
public void handleException(
ParseException ex, SIPMessage sipMessage, Class hdrClass, String header, String message)
throws ParseException {
if (sipStack.isLoggingEnabled()) this.sipStack.logWriter.logException(ex);
// Log the bad message for later reference.
if ((hdrClass != null)
&& (hdrClass.equals(From.class)
|| hdrClass.equals(To.class)
|| hdrClass.equals(CSeq.class)
|| hdrClass.equals(Via.class)
|| hdrClass.equals(CallID.class)
|| hdrClass.equals(RequestLine.class)
|| hdrClass.equals(StatusLine.class))) {
sipStack.logWriter.logError("BAD MESSAGE!");
sipStack.logWriter.logError(message);
throw ex;
} else {
sipMessage.addUnparsed(header);
}
}
/**
* Send a message to a specified receiver address.
*
* @param msg message string to send.
* @param peerAddress Address of the place to send it to.
* @param peerPort the port to send it to.
* @param peerProtocol protocol to use to send.
* @throws IOException If there is trouble sending this message.
*/
protected void sendMessage(
byte[] msg, InetAddress peerAddress, int peerPort, String peerProtocol, boolean retry)
throws IOException {
// Via is not included in the request so silently drop the reply.
if (peerPort == -1) {
if (sipStack.isLoggingEnabled()) {
this.sipStack.logWriter.logDebug(getClass().getName() + ":sendMessage: Dropping reply!");
}
throw new IOException("Receiver port not set ");
} else {
if (sipStack.isLoggingEnabled()) {
this.sipStack.logWriter.logDebug(
getClass().getName()
+ ":sendMessage "
+ peerAddress.getHostAddress()
+ "/"
+ peerPort
+ "\n"
+ new String(msg));
this.sipStack.logWriter.logDebug("*******************\n");
}
}
if (peerProtocol.compareToIgnoreCase("UDP") == 0) {
DatagramPacket reply = new DatagramPacket(msg, msg.length, peerAddress, peerPort);
try {
DatagramSocket sock;
if (sipStack.udpFlag) {
sock = ((UDPMessageProcessor) messageProcessor).sock;
} else {
// bind to any interface and port.
sock = sipStack.getNetworkLayer().createDatagramSocket();
}
if (sipStack.isLoggingEnabled()) {
this.sipStack.logWriter.logDebug(
"sendMessage "
+ peerAddress.getHostAddress()
+ "/"
+ peerPort
+ "\n"
+ new String(msg));
}
sock.send(reply);
if (!sipStack.udpFlag) sock.close();
} catch (IOException ex) {
throw ex;
} catch (Exception ex) {
InternalErrorHandler.handleException(ex);
}
} else {
// Use TCP to talk back to the sender.
Socket outputSocket =
sipStack.ioHandler.sendBytes(
this.messageProcessor.getIpAddress(), peerAddress, peerPort, "tcp", msg, retry);
OutputStream myOutputStream = outputSocket.getOutputStream();
myOutputStream.write(msg, 0, msg.length);
myOutputStream.flush();
// The socket is cached (dont close it!);
}
}
/**
* Actually proces the parsed message.
*
* @param sipMessage
*/
public void processMessage(SIPMessage sipMessage) {
if (sipMessage instanceof SIPRequest) {
SIPRequest sipRequest = (SIPRequest) sipMessage;
// This is a request - process it.
// So far so good -- we will commit this message if
// all processing is OK.
if (sipStack.logWriter.isLoggingEnabled(ServerLog.TRACE_MESSAGES)) {
this.sipStack.serverLog.logMessage(
sipMessage,
this.getPeerHostPort().toString(),
this.getHost() + ":" + this.myPort,
false,
receptionTime);
}
ServerRequestInterface sipServerRequest = sipStack.newSIPServerRequest(sipRequest, this);
// Drop it if there is no request returned
if (sipServerRequest == null) {
if (sipStack.isLoggingEnabled()) {
this.sipStack.logWriter.logWarning("Null request interface returned -- dropping request");
}
return;
}
if (sipStack.isLoggingEnabled())
this.sipStack.logWriter.logDebug(
"About to process " + sipRequest.getFirstLine() + "/" + sipServerRequest);
try {
sipServerRequest.processRequest(sipRequest, this);
} finally {
if (sipServerRequest instanceof SIPTransaction) {
SIPServerTransaction sipServerTx = (SIPServerTransaction) sipServerRequest;
if (!sipServerTx.passToListener()) {
((SIPTransaction) sipServerRequest).releaseSem();
}
}
}
if (sipStack.isLoggingEnabled())
this.sipStack.logWriter.logDebug(
"Done processing " + sipRequest.getFirstLine() + "/" + sipServerRequest);
// So far so good -- we will commit this message if
// all processing is OK.
} else {
// Handle a SIP Reply message.
SIPResponse sipResponse = (SIPResponse) sipMessage;
try {
sipResponse.checkHeaders();
} catch (ParseException ex) {
if (sipStack.isLoggingEnabled())
sipStack.logWriter.logError(
"Dropping Badly formatted response message >>> " + sipResponse);
return;
}
ServerResponseInterface sipServerResponse = sipStack.newSIPServerResponse(sipResponse, this);
if (sipServerResponse != null) {
try {
if (sipServerResponse instanceof SIPClientTransaction
&& !((SIPClientTransaction) sipServerResponse).checkFromTag(sipResponse)) {
if (sipStack.isLoggingEnabled())
sipStack.logWriter.logError(
"Dropping response message with invalid tag >>> " + sipResponse);
return;
}
sipServerResponse.processResponse(sipResponse, this);
} finally {
if (sipServerResponse instanceof SIPTransaction
&& !((SIPTransaction) sipServerResponse).passToListener())
((SIPTransaction) sipServerResponse).releaseSem();
}
// Normal processing of message.
} else {
if (sipStack.isLoggingEnabled()) {
this.sipStack.logWriter.logDebug("null sipServerResponse!");
}
}
}
}
/**
* 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);
}