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

Example 1 with RAck

use of gov.nist.javax.sip.header.RAck 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 2 with RAck

use of gov.nist.javax.sip.header.RAck 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();
}