MATE - SIP MESSAGE call flow

Question

Hello Experts,

I need your help on the Gop per SIP MESSAGE call flow.

The complete SIP MESSAGE call flow is like

Client   ------SIP MESSAGE with sip.Call-ID="a1"-----------> Sever  (this is client sends MESSAGE)
Client   <----SIP 202 Accepted with sip.Call-ID="a1"--------- Sever
Client   <----SIP MESSAGE with sip.Call-ID="b1" and sip.In-Reply-To="a1"----------- Sever (this is status report from server to Client)
Client   -----SIP 200 OK with sip.Call-ID="b1"-----------> Sever

The question is how can use Gop to extract both transactions with either sip.In-Reply-To or sip.Status.Code?

// Create a "SIP-pdu" that contains various pieces of the processed SIP
// message.
Pdu sip_pdu Proto sip Transport udp {
        Extract callid From sip.Call-ID;
        Extract callid From sip.In-Reply-To;
        Extract cseq_method From sip.CSeq.method;
        Extract status_code From sip.Status-Code;
};
// Then create a GOP (Group Of Pdus) where the each GOP contains all the PDUs
// (msgs) that whose call-id, sip.CSeq.seq,and sip.CSeq.method match.
Gop sip_transaction On sip_pdu Match (callid,cseq_method) {
        Start();
        Stop(never);
    // Store the result code in the GOP
    Extra(status_code);

};

Done;

Thank you so much!

Answer 1

Hmmm, I'm not sure you could get the 2 transactions (I guess you want all the transactions where sip.In-Reply-To or sip.Call-Id have the value "a1", for example) into one GoP.

To do this I think you'd need to create a GoP that contains each transaction and then a GoG (Group of Groups) that contains the 2 transactions. Something like:

Gog sip_thingy {
    Member callid (call);
    Member inreplyto (call)
};

(Of course your gop would need to put Call-Id and In-Reply-To into separate fields named callid and inreplyto, respectively.)