예제 #1
0
 /**
  * Find a matching client SUBSCRIBE to the incoming notify. NOTIFY requests are matched to such
  * SUBSCRIBE requests if they contain the same "Call-ID", a "To" header "tag" parameter which
  * matches the "From" header "tag" parameter of the SUBSCRIBE, and the same "Event" header field.
  * Rules for comparisons of the "Event" headers are described in section 7.2.1. If a matching
  * NOTIFY request contains a "Subscription-State" of "active" or "pending", it creates a new
  * subscription and a new dialog (unless they have already been created by a matching response, as
  * described above).
  *
  * @param notifyMessage
  */
 public SIPClientTransaction findSubscribeTransaction(SIPRequest notifyMessage) {
   synchronized (clientTransactions) {
     Iterator<SIPClientTransaction> it = clientTransactions.iterator();
     String thisToTag = notifyMessage.getTo().getTag();
     if (thisToTag == null) return null;
     Event eventHdr = (Event) notifyMessage.getHeader(EventHeader.NAME);
     if (eventHdr == null) return null;
     while (it.hasNext()) {
       SIPClientTransaction ct = (SIPClientTransaction) it.next();
       // SIPRequest sipRequest = ct.getOriginalRequest();
       String fromTag = ct.from.getTag();
       Event hisEvent = ct.event;
       // Event header is mandatory but some slopply clients
       // dont include it.
       if (hisEvent == null) continue;
       if (ct.method.equals(Request.SUBSCRIBE)
           && fromTag.equalsIgnoreCase(thisToTag)
           && hisEvent != null
           && eventHdr.match(hisEvent)
           && notifyMessage.getCallId().getCallId().equalsIgnoreCase(ct.callId.getCallId()))
         return ct;
     }
   }
   return null;
 }
예제 #2
0
  /**
   * Performs strict router fix according to RFC3261 section 16.6 step 6
   *
   * <p>pre: top route header in request has no 'lr' parameter in URI post: request-URI added as
   * last route header, new req-URI = top-route-URI
   */
  public void fixStrictRouting(SIPRequest req) {

    RouteList routes = req.getRouteHeaders();
    Route first = (Route) routes.getFirst();
    SipUri firstUri = (SipUri) first.getAddress().getURI();
    routes.removeFirst();

    // Add request-URI as last Route entry
    AddressImpl addr = new AddressImpl();
    addr.setAddess(req.getRequestURI()); // don't clone it
    Route route = new Route(addr);

    routes.add(route); // as last one
    req.setRequestURI(firstUri);
    if (sipStack.isLoggingEnabled()) {
      sipStack.getStackLogger().logDebug("post: fixStrictRouting" + req);
    }
  }
예제 #3
0
 /** Hash table for quick lookup of transactions. */
 protected void addTransactionHash(SIPTransaction sipTransaction) {
   SIPRequest sipRequest = sipTransaction.getOriginalRequest();
   // Via via = sipRequest.getTopmostVia();
   // Cannot cache old style requests.
   /**
    * if (via.getBranch() == null || ! via.getBranch().toUpperCase().startsWith
    * (SIPConstants.BRANCH_MAGIC_COOKIE.toUpperCase())){ return; }
    */
   if (sipTransaction instanceof SIPClientTransaction) {
     synchronized (clientTransactionTable) {
       String key = sipRequest.getTransactionId();
       clientTransactionTable.put(key, sipTransaction);
     }
   } else {
     synchronized (serverTransactionTable) {
       String key = sipRequest.getTransactionId();
       serverTransactionTable.put(key, sipTransaction);
     }
   }
 }
예제 #4
0
  /**
   * Return addresses for default proxy to forward the request to. The list is organized in the
   * following priority. If the requestURI refers directly to a host, the host and port information
   * are extracted from it and made the next hop on the list. If the default route has been
   * specified, then it is used to construct the next element of the list. <code>
   * RouteHeader firstRoute = (RouteHeader) req.getHeader( RouteHeader.NAME );
   * if (firstRoute!=null) {
   *   URI uri = firstRoute.getAddress().getURI();
   *    if (uri.isSIPUri()) {
   *       SipURI nextHop = (SipURI) uri;
   *       if ( nextHop.hasLrParam() ) {
   *           // OK, use it
   *       } else {
   *           nextHop = fixStrictRouting( req );        <--- Here, make the modifications as per RFC3261
   *       }
   *   } else {
   *       // error: non-SIP URI not allowed in Route headers
   *       throw new SipException( "Request has Route header with non-SIP URI" );
   *   }
   * } else if (outboundProxy!=null) {
   *   // use outbound proxy for nextHop
   * } else if ( req.getRequestURI().isSipURI() ) {
   *   // use request URI for nextHop
   * }
   *
   * </code>
   *
   * @param request is the sip request to route.
   */
  public Hop getNextHop(Request request) throws SipException {

    SIPRequest sipRequest = (SIPRequest) request;

    RequestLine requestLine = sipRequest.getRequestLine();
    if (requestLine == null) {
      return defaultRoute;
    }
    javax.sip.address.URI requestURI = requestLine.getUri();
    if (requestURI == null) throw new IllegalArgumentException("Bad message: Null requestURI");

    RouteList routes = sipRequest.getRouteHeaders();

    /*
     * In case the topmost Route header contains no 'lr' parameter (which
     * means the next hop is a strict router), the implementation will
     * perform 'Route Information Postprocessing' as described in RFC3261
     * section 16.6 step 6 (also known as "Route header popping"). That is,
     * the following modifications will be made to the request:
     *
     * The implementation places the Request-URI into the Route header field
     * as the last value.
     *
     * The implementation then places the first Route header field value
     * into the Request-URI and removes that value from the Route header
     * field.
     *
     * Subsequently, the request URI will be used as next hop target
     */

    if (routes != null) {

      // to send the request through a specified hop the application is
      // supposed to prepend the appropriate Route header which.
      Route route = (Route) routes.getFirst();
      URI uri = route.getAddress().getURI();
      if (uri.isSipURI()) {
        SipURI sipUri = (SipURI) uri;
        if (!sipUri.hasLrParam()) {

          fixStrictRouting(sipRequest);
          if (sipStack.isLoggingEnabled())
            sipStack.getStackLogger().logDebug("Route post processing fixed strict routing");
        }

        Hop hop = createHop(sipUri, request);
        if (sipStack.isLoggingEnabled())
          sipStack.getStackLogger().logDebug("NextHop based on Route:" + hop);
        return hop;
      } else {
        throw new SipException("First Route not a SIP URI");
      }

    } else if (requestURI.isSipURI() && ((SipURI) requestURI).getMAddrParam() != null) {
      Hop hop = createHop((SipURI) requestURI, request);
      if (sipStack.isLoggingEnabled())
        sipStack
            .getStackLogger()
            .logDebug("Using request URI maddr to route the request = " + hop.toString());

      // JvB: don't remove it!
      // ((SipURI) requestURI).removeParameter("maddr");

      return hop;

    } else if (defaultRoute != null) {
      if (sipStack.isLoggingEnabled())
        sipStack
            .getStackLogger()
            .logDebug("Using outbound proxy to route the request = " + defaultRoute.toString());
      return defaultRoute;
    } else if (requestURI.isSipURI()) {
      Hop hop = createHop((SipURI) requestURI, request);
      if (hop != null && sipStack.isLoggingEnabled())
        sipStack.getStackLogger().logDebug("Used request-URI for nextHop = " + hop.toString());
      else if (sipStack.isLoggingEnabled()) {
        sipStack.getStackLogger().logDebug("returning null hop -- loop detected");
      }
      return hop;

    } else {
      // The internal router should never be consulted for non-sip URIs.
      InternalErrorHandler.handleException(
          "Unexpected non-sip URI", this.sipStack.getStackLogger());
      return null;
    }
  }
예제 #5
0
  /**
   * Handles a new SIP request. It finds a server transaction to handle this message. If none
   * exists, it creates a new transaction.
   *
   * @param requestReceived Request to handle.
   * @param requestMessageChannel Channel that received message.
   * @return A server transaction.
   */
  protected ServerRequestInterface newSIPServerRequest(
      SIPRequest requestReceived, MessageChannel requestMessageChannel) {

    // Iterator through all server transactions
    Iterator<SIPServerTransaction> transactionIterator;
    // Next transaction in the set
    SIPServerTransaction nextTransaction;
    // Transaction to handle this request
    SIPServerTransaction currentTransaction;

    String key = requestReceived.getTransactionId();

    currentTransaction = (SIPServerTransaction) serverTransactionTable.get(key);
    if (currentTransaction == null
        || !currentTransaction.isMessagePartOfTransaction(requestReceived)) {

      // Loop through all server transactions
      synchronized (serverTransactions) {
        transactionIterator = serverTransactions.iterator();
        currentTransaction = null;
        while (transactionIterator.hasNext() && currentTransaction == null) {

          nextTransaction = (SIPServerTransaction) transactionIterator.next();

          // If this transaction should handle this request,
          if (nextTransaction.isMessagePartOfTransaction(requestReceived)) {
            // Mark this transaction as the one
            // to handle this message
            currentTransaction = nextTransaction;
          }
        }

        // If no transaction exists to handle this message
        if (currentTransaction == null) {
          currentTransaction = findPendingTransaction(requestReceived);
          if (currentTransaction != null) return currentTransaction;
          currentTransaction = createServerTransaction(requestMessageChannel);
          currentTransaction.setOriginalRequest(requestReceived);
          if (!isDialogCreated(requestReceived.getMethod())) {
            // Dialog is not created - can we find the state?
            // If so, then create a transaction and add it.
            String dialogId = requestReceived.getDialogId(true);
            SIPDialog dialog = getDialog(dialogId);
            // Sequence numbers are supposed to increment.
            // avoid processing old sequence numbers and
            // delivering the same request up to the
            // application if the request has already been seen.
            // Special handling applies to ACK processing.
            if (dialog != null
                && (requestReceived.getMethod().equals(Request.ACK)
                    || requestReceived.getCSeq().getSequenceNumber()
                        > dialog.getRemoteSequenceNumber())) {
              // Found a dialog.
              if (LogWriter.needsLogging)
                logWriter.logMessage("adding server transaction " + currentTransaction);
              serverTransactions.add(0, currentTransaction);
              addTransactionHash(currentTransaction);
              currentTransaction.startTransactionTimer();
              currentTransaction.isMapped = true;
            }
          } else {
            // Create the transaction but dont map it.
            String dialogId = requestReceived.getDialogId(true);
            SIPDialog dialog = getDialog(dialogId);
            // This is a dialog creating request that is part of an
            // existing dialog (eg. re-Invite). Re-invites get a non
            // null server transaction Id (unlike the original
            // invite).
            if (dialog != null
                && requestReceived.getCSeq().getSequenceNumber()
                    > dialog.getRemoteSequenceNumber()) {
              currentTransaction.map();
              if (LogWriter.needsLogging)
                logWriter.logMessage("adding server transaction " + currentTransaction);
              serverTransactions.add(0, currentTransaction);
              addTransactionHash(currentTransaction);
              currentTransaction.startTransactionTimer();
              currentTransaction.toListener = true;
            }
          }
        }
      }
    }

    // Set ths transaction's encapsulated request
    // interface from the superclass
    currentTransaction.setRequestInterface(
        super.newSIPServerRequest(requestReceived, currentTransaction));
    return currentTransaction;
  }