/**
   * 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);
  }
Beispiel #4
0
  /**
   * 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);
    }
  }