Examples with RSeq gov.nist.javax.sip.header.RSeq used on opensource projects

Example 1 with RSeq

use of gov.nist.javax.sip.header.RSeq in project XobotOS by xamarin.

the class SIPServerTransaction method sendReliableProvisionalResponse.

protected void sendReliableProvisionalResponse(Response relResponse) throws SipException {
    /*
         * After the first reliable provisional response for a request has been acknowledged, the
         * UAS MAY send additional reliable provisional responses. The UAS MUST NOT send a second
         * reliable provisional response until the first is acknowledged.
         */
    if (this.pendingReliableResponse != null) {
        throw new SipException("Unacknowledged response");
    } else
        this.pendingReliableResponse = (SIPResponse) relResponse;
    /*
         * In addition, it MUST contain a Require header field containing the option tag 100rel,
         * and MUST include an RSeq header field.
         */
    RSeq rseq = (RSeq) relResponse.getHeader(RSeqHeader.NAME);
    if (relResponse.getHeader(RSeqHeader.NAME) == null) {
        rseq = new RSeq();
        relResponse.setHeader(rseq);
    }
    try {
        this.rseqNumber++;
        rseq.setSeqNumber(this.rseqNumber);
        // start the timer task which will retransmit the reliable response
        // until the PRACK is received
        this.lastResponse = (SIPResponse) relResponse;
        if (this.getDialog() != null) {
            boolean acquired = this.provisionalResponseSem.tryAcquire(1, TimeUnit.SECONDS);
            if (!acquired) {
                throw new SipException("Unacknowledged response");
            }
        }
        this.sendMessage((SIPMessage) relResponse);
        this.provisionalResponseTask = new ProvisionalResponseTask();
        this.sipStack.getTimer().schedule(provisionalResponseTask, 0, SIPTransactionStack.BASE_TIMER_INTERVAL);
    } catch (Exception ex) {
        InternalErrorHandler.handleException(ex);
    }
}

Example 2 with RSeq

use of gov.nist.javax.sip.header.RSeq in project XobotOS by xamarin.

the class SIPDialog method createPrack.

/*
     * (non-Javadoc) Retransmissions of the reliable provisional response cease when a matching
     * PRACK is received by the UA core. PRACK is like any other request within a dialog, and the
     * UAS core processes it according to the procedures of Sections 8.2 and 12.2.2 of RFC 3261. A
     * matching PRACK is defined as one within the same dialog as the response, and whose method,
     * CSeq-num, and response-num in the RAck header field match, respectively, the method from
     * the CSeq, the sequence number from the CSeq, and the sequence number from the RSeq of the
     * reliable provisional response.
     * 
     * @see javax.sip.Dialog#createPrack(javax.sip.message.Response)
     */
public Request createPrack(Response relResponse) throws DialogDoesNotExistException, SipException {
    if (this.getState() == null || this.getState().equals(DialogState.TERMINATED))
        throw new DialogDoesNotExistException("Dialog not initialized or terminated");
    if ((RSeq) relResponse.getHeader(RSeqHeader.NAME) == null) {
        throw new SipException("Missing RSeq Header");
    }
    try {
        SIPResponse sipResponse = (SIPResponse) relResponse;
        SIPRequest sipRequest = (SIPRequest) this.createRequest(Request.PRACK, (SIPResponse) relResponse);
        String toHeaderTag = sipResponse.getTo().getTag();
        sipRequest.setToTag(toHeaderTag);
        RAck rack = new RAck();
        RSeq rseq = (RSeq) relResponse.getHeader(RSeqHeader.NAME);
        rack.setMethod(sipResponse.getCSeq().getMethod());
        rack.setCSequenceNumber((int) sipResponse.getCSeq().getSeqNumber());
        rack.setRSequenceNumber(rseq.getSeqNumber());
        sipRequest.setHeader(rack);
        return (Request) sipRequest;
    } catch (Exception ex) {
        InternalErrorHandler.handleException(ex);
        return null;
    }
}

Example 3 with RSeq

use of gov.nist.javax.sip.header.RSeq in project XobotOS by xamarin.

the class SIPDialog method handlePrack.

/**
     * Do the processing necessary for the PRACK
     * 
     * @param prackRequest
     * @return true if this is the first time the tx has seen the prack ( and hence needs to be
     *         passed up to the TU)
     */
public boolean handlePrack(SIPRequest prackRequest) {
    /*
         * The RAck header is sent in a PRACK request to support reliability of provisional
         * responses. It contains two numbers and a method tag. The first number is the value from
         * the RSeq header in the provisional response that is being acknowledged. The next
         * number, and the method, are copied from the CSeq in the response that is being
         * acknowledged. The method name in the RAck header is case sensitive.
         */
    if (!this.isServer()) {
        if (sipStack.isLoggingEnabled())
            sipStack.getStackLogger().logDebug("Dropping Prack -- not a server Dialog");
        return false;
    }
    SIPServerTransaction sipServerTransaction = (SIPServerTransaction) this.getFirstTransaction();
    SIPResponse sipResponse = sipServerTransaction.getReliableProvisionalResponse();
    if (sipResponse == null) {
        if (sipStack.isLoggingEnabled())
            sipStack.getStackLogger().logDebug("Dropping Prack -- ReliableResponse not found");
        return false;
    }
    RAck rack = (RAck) prackRequest.getHeader(RAckHeader.NAME);
    if (rack == null) {
        if (sipStack.isLoggingEnabled())
            sipStack.getStackLogger().logDebug("Dropping Prack -- rack header not found");
        return false;
    }
    CSeq cseq = (CSeq) sipResponse.getCSeq();
    if (!rack.getMethod().equals(cseq.getMethod())) {
        if (sipStack.isLoggingEnabled())
            sipStack.getStackLogger().logDebug("Dropping Prack -- CSeq Header does not match PRACK");
        return false;
    }
    if (rack.getCSeqNumberLong() != cseq.getSeqNumber()) {
        if (sipStack.isLoggingEnabled())
            sipStack.getStackLogger().logDebug("Dropping Prack -- CSeq Header does not match PRACK");
        return false;
    }
    RSeq rseq = (RSeq) sipResponse.getHeader(RSeqHeader.NAME);
    if (rack.getRSequenceNumber() != rseq.getSeqNumber()) {
        if (sipStack.isLoggingEnabled())
            sipStack.getStackLogger().logDebug("Dropping Prack -- RSeq Header does not match PRACK");
        return false;
    }
    return sipServerTransaction.prackRecieved();
}

Example 4 with RSeq

use of gov.nist.javax.sip.header.RSeq in project XobotOS by xamarin.

the class SIPDialog method createReliableProvisionalResponse.

/*
     * (non-Javadoc)
     * 
     * @see javax.sip.Dialog#createReliableProvisionalResponse(int)
     */
public Response createReliableProvisionalResponse(int statusCode) throws InvalidArgumentException, SipException {
    if (!(firstTransactionIsServerTransaction)) {
        throw new SipException("Not a Server Dialog!");
    }
    /*
         * A UAS MUST NOT attempt to send a 100 (Trying) response reliably. Only provisional
         * responses numbered 101 to 199 may be sent reliably. If the request did not include
         * either a Supported or Require header field indicating this feature, the UAS MUST NOT
         * send the provisional response reliably.
         */
    if (statusCode <= 100 || statusCode > 199)
        throw new InvalidArgumentException("Bad status code ");
    SIPRequest request = this.originalRequest;
    if (!request.getMethod().equals(Request.INVITE))
        throw new SipException("Bad method");
    ListIterator<SIPHeader> list = request.getHeaders(SupportedHeader.NAME);
    if (list == null || !optionPresent(list, "100rel")) {
        list = request.getHeaders(RequireHeader.NAME);
        if (list == null || !optionPresent(list, "100rel")) {
            throw new SipException("No Supported/Require 100rel header in the request");
        }
    }
    SIPResponse response = request.createResponse(statusCode);
    /*
         * The provisional response to be sent reliably is constructed by the UAS core according
         * to the procedures of Section 8.2.6 of RFC 3261. In addition, it MUST contain a Require
         * header field containing the option tag 100rel, and MUST include an RSeq header field.
         * The value of the header field for the first reliable provisional response in a
         * transaction MUST be between 1 and 2**31 - 1. It is RECOMMENDED that it be chosen
         * uniformly in this range. The RSeq numbering space is within a single transaction. This
         * means that provisional responses for different requests MAY use the same values for the
         * RSeq number.
         */
    Require require = new Require();
    try {
        require.setOptionTag("100rel");
    } catch (Exception ex) {
        InternalErrorHandler.handleException(ex);
    }
    response.addHeader(require);
    RSeq rseq = new RSeq();
    /*
         * set an arbitrary sequence number. This is actually set when the response is sent out
         */
    rseq.setSeqNumber(1L);
    /*
         * Copy the record route headers from the request to the response ( Issue 160 ). Note that
         * other 1xx headers do not get their Record Route headers copied over but reliable
         * provisional responses do. See RFC 3262 Table 2.
         */
    RecordRouteList rrl = request.getRecordRouteHeaders();
    if (rrl != null) {
        RecordRouteList rrlclone = (RecordRouteList) rrl.clone();
        response.setHeader(rrlclone);
    }
    return response;
}