Example #1
0
  /**
   * Find the transaction corresponding to a given request.
   *
   * @param sipMessage request for which to retrieve the transaction.
   * @param isServer search the server transaction table if true.
   * @return the transaction object corresponding to the request or null if no such mapping exists.
   */
  public SIPTransaction findTransaction(SIPMessage sipMessage, boolean isServer) {
    SIPTransaction retval = null;

    if (isServer) {
      Via via = sipMessage.getTopmostVia();
      if (via.getBranch() != null) {
        String key = sipMessage.getTransactionId();

        synchronized (this.serverTransactionTable) {
          retval = (SIPTransaction) serverTransactionTable.get(key);
          if (LogWriter.needsLogging) logMessage("looking for key " + key);
          if (retval != null && retval.isMessagePartOfTransaction(sipMessage)) return retval;
        }
      }
      // Need to scan the table for old style transactions (RFC 2543
      // style)
      synchronized (this.serverTransactions) {
        Iterator<SIPServerTransaction> it = serverTransactions.iterator();
        while (it.hasNext()) {
          SIPServerTransaction sipServerTransaction = (SIPServerTransaction) it.next();
          if (sipServerTransaction.isMessagePartOfTransaction(sipMessage))
            return sipServerTransaction;
        }
      }
    } else {
      Via via = sipMessage.getTopmostVia();
      if (via.getBranch() != null) {
        String key = sipMessage.getTransactionId();
        synchronized (this.clientTransactionTable) {
          retval = (SIPTransaction) clientTransactionTable.get(key);
          if (retval != null && retval.isMessagePartOfTransaction(sipMessage)) return retval;
        }
      }
      // Need to scan the table for old style transactions (RFC 2543
      // style)
      synchronized (this.clientTransactions) {
        Iterator<SIPClientTransaction> it = clientTransactions.iterator();
        while (it.hasNext()) {
          SIPClientTransaction clientTransaction = (SIPClientTransaction) it.next();
          if (clientTransaction.isMessagePartOfTransaction(sipMessage)) return clientTransaction;
        }
      }
    }
    return null;
  }
  /**
   * 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(SIPMessage sipMessage) throws Exception {
    try {
      if (sipMessage.getFrom() == null
          || // sipMessage.getFrom().getTag() == null ||
          sipMessage.getTo() == null
          || sipMessage.getCallId() == null
          || sipMessage.getCSeq() == null
          || sipMessage.getViaHeaders() == null) {
        String badmsg = sipMessage.encode();
        if (LogWriter.needsLogging) {
          stack.logWriter.logMessage("bad message " + badmsg);
          stack.logWriter.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 SIPRequest) {
        Via v = (Via) viaList.first();
        if (v.hasPort()) {
          this.peerPort = v.getPort();
        } else this.peerPort = 5061;
        this.peerProtocol = v.getTransport();
        try {
          this.peerAddress = mySock.getInetAddress();
          // Check to see if the received parameter matches
          // the peer address and tag it appropriately.
          // Bug fix by [email protected]
          // Should record host address not host name
          // bug fix by  Joost Yervante Damand
          if (!v.getSentBy().getInetAddress().equals(this.peerAddress)) {
            v.setParameter(Via.RECEIVED, this.peerAddress.getHostAddress());
            // @@@ hagai
            v.setParameter(Via.RPORT, new Integer(this.peerPort).toString());
          }
        } catch (java.net.UnknownHostException ex) {
          // Could not resolve the sender address.
          if (LogWriter.needsLogging) {
            stack.logWriter.logMessage("Rejecting message -- could not resolve Via Address");
          }
          return;
        } catch (java.text.ParseException ex) {
          InternalErrorHandler.handleException(ex);
        }
        // Use this for outgoing messages as well.
        if (!this.isCached) {
          ((TLSMessageProcessor) this.messageProcessor).cacheMessageChannel(this);
          this.isCached = true;
          String key = IOHandler.makeKey(mySock.getInetAddress(), this.peerPort);
          stack.ioHandler.putSocket(key, mySock);
        }
      }

      // Foreach part of the request header, fetch it and process it

      long receptionTime = System.currentTimeMillis();
      //

      if (sipMessage instanceof SIPRequest) {
        // This is a request - process the request.
        SIPRequest sipRequest = (SIPRequest) sipMessage;
        // Create a new sever side request processor for this
        // message and let it handle the rest.

        if (LogWriter.needsLogging) {
          stack.logWriter.logMessage("----Processing Message---");
        }

        // Check for reasonable size - reject message
        // if it is too long.
        if (stack.getMaxMessageSize() > 0
            && sipRequest.getSize()
                    + (sipRequest.getContentLength() == null
                        ? 0
                        : sipRequest.getContentLength().getContentLength())
                > stack.getMaxMessageSize()) {
          SIPResponse sipResponse = sipRequest.createResponse(SIPResponse.MESSAGE_TOO_LARGE);
          byte[] resp = sipResponse.encodeAsBytes();
          this.sendMessage(resp, false);
          throw new Exception("Message size exceeded");
        }

        ServerRequestInterface sipServerRequest = stack.newSIPServerRequest(sipRequest, this);
        sipServerRequest.processRequest(sipRequest, this);
        if (this.stack.serverLog.needsLogging(ServerLog.TRACE_MESSAGES)) {
          if (sipServerRequest.getProcessingInfo() == null) {
            stack.serverLog.logMessage(
                sipMessage,
                sipRequest.getViaHost() + ":" + sipRequest.getViaPort(),
                stack.getHostAddress() + ":" + stack.getPort(this.getTransport()),
                false,
                receptionTime);
          } else {
            this.stack.serverLog.logMessage(
                sipMessage,
                sipRequest.getViaHost() + ":" + sipRequest.getViaPort(),
                stack.getHostAddress() + ":" + stack.getPort(this.getTransport()),
                sipServerRequest.getProcessingInfo(),
                false,
                receptionTime);
          }
        }
      } else {
        SIPResponse sipResponse = (SIPResponse) sipMessage;
        // This is a response message - process it.
        // Check the size of the response.
        // If it is too large dump it silently.
        if (stack.getMaxMessageSize() > 0
            && sipResponse.getSize()
                    + (sipResponse.getContentLength() == null
                        ? 0
                        : sipResponse.getContentLength().getContentLength())
                > stack.getMaxMessageSize()) {
          if (LogWriter.needsLogging) this.stack.logWriter.logMessage("Message size exceeded");
          return;
        }
        ServerResponseInterface sipServerResponse = stack.newSIPServerResponse(sipResponse, this);
        sipServerResponse.processResponse(sipResponse, this);
      }
    } finally {
    }
  }
  /**
   * 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);
  }