/**
* 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);
}
}
/**
* 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);
}
/**
* Logs the specified message and details to the packet logging service if enabled.
*
* @param message the message to log
* @param sender determines whether we are the origin of this message.
*/
private void logPacket(SIPMessage message, boolean sender) {
try {
PacketLoggingService packetLogging = SipActivator.getPacketLogging();
if (packetLogging == null
|| !packetLogging.isLoggingEnabled(PacketLoggingService.ProtocolName.SIP)
/* Via not present in CRLF packet on TCP - causes NPE */
|| message.getTopmostVia() == null) return;
String transport = message.getTopmostVia().getTransport();
boolean isTransportUDP = transport.equalsIgnoreCase("UDP");
byte[] srcAddr;
int srcPort;
byte[] dstAddr;
int dstPort;
// if addresses are not set use empty byte array with length
// equals to the other address or just empty
// byte array with length 4 (ipv4 0.0.0.0)
if (sender) {
if (!isTransportUDP) {
InetSocketAddress localAddress =
getLocalAddressForDestination(
message.getRemoteAddress(),
message.getRemotePort(),
message.getLocalAddress(),
transport);
srcPort = localAddress.getPort();
srcAddr = localAddress.getAddress().getAddress();
} else {
srcPort = message.getLocalPort();
if (message.getLocalAddress() != null) srcAddr = message.getLocalAddress().getAddress();
else if (message.getRemoteAddress() != null)
srcAddr = new byte[message.getRemoteAddress().getAddress().length];
else srcAddr = new byte[4];
}
dstPort = message.getRemotePort();
if (message.getRemoteAddress() != null) dstAddr = message.getRemoteAddress().getAddress();
else dstAddr = new byte[srcAddr.length];
} else {
if (!isTransportUDP) {
InetSocketAddress dstAddress =
getLocalAddressForDestination(
message.getRemoteAddress(),
message.getRemotePort(),
message.getLocalAddress(),
transport);
dstPort = dstAddress.getPort();
dstAddr = dstAddress.getAddress().getAddress();
} else {
dstPort = message.getLocalPort();
if (message.getLocalAddress() != null) dstAddr = message.getLocalAddress().getAddress();
else if (message.getRemoteAddress() != null)
dstAddr = new byte[message.getRemoteAddress().getAddress().length];
else dstAddr = new byte[4];
}
srcPort = message.getRemotePort();
if (message.getRemoteAddress() != null) srcAddr = message.getRemoteAddress().getAddress();
else srcAddr = new byte[dstAddr.length];
}
byte[] msg = null;
if (message instanceof SIPRequest) {
SIPRequest req = (SIPRequest) message;
if (req.getMethod().equals(SIPRequest.MESSAGE)
&& message.getContentTypeHeader() != null
&& message.getContentTypeHeader().getContentType().equalsIgnoreCase("text")) {
int len = req.getContentLength().getContentLength();
if (len > 0) {
SIPRequest newReq = (SIPRequest) req.clone();
byte[] newContent = new byte[len];
Arrays.fill(newContent, (byte) '.');
newReq.setMessageContent(newContent);
msg = newReq.toString().getBytes("UTF-8");
}
}
}
if (msg == null) {
msg = message.toString().getBytes("UTF-8");
}
packetLogging.logPacket(
PacketLoggingService.ProtocolName.SIP,
srcAddr,
srcPort,
dstAddr,
dstPort,
isTransportUDP
? PacketLoggingService.TransportName.UDP
: PacketLoggingService.TransportName.TCP,
sender,
msg);
} catch (Throwable e) {
logger.error("Cannot obtain message body", e);
}
}
