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Re: [reSIProcate] why different between send 200 OK message and refer message in the Via header


Like I noted earlier, when we are preparing to send the REFER, we decide what to put in the topmost Via by making a call to connect (which prompts a routing-table lookup). This will tell us what interface we should send on. Once we get this information, we can fill out the topmost Via. Since this lookup happens down in the TransportSelector, it may not have happened yet when the logging statement was written. Also, as I mentioned before, if the routing table gives us something crazy like 127.0.0.1, we may fail to find a transport bound to that interface, and fail to populate the topmost Via. Is the REFER making it out on the wire? What does it look like then?

Best regards,
Byron Campen

resip


why different between send 200 OK message and refer message in the Via header



[14:01:03]                      onConnected


SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.2.143:5060;branch=z9hG4bK1c0a8028f45c81990-35d-ac89
Contact: <sip:63471111@xxxxxxxxxxxx:37000;user=phone>
To: <sip:63471111@xxxxxxxxxxxx:37000>;tag=8b03dd2c
From: "6591000508"<sip: 6591000508@xxxxxxxxxxxxx:5060>;tag=t1170741648-co861
Call-ID: 1170741648885806400-0@xxxxxxxxxxx
CSeq: 6090 INVITE
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, NOTIFY, REFER
Content-Type: application/sdp
User-Agent: hmd/2.0
Content-Length: 182



[14:01:03]                      Ready to send...
REFER sip:6591000508@xxxxxxxxxxxxx:5060 SIP/2.0
Via: SIP/2.0/ ;branch=z9hG4bK-d8754z-ce36cf488e13cd26-1--- d8754z-;rport
Max-Forwards: 70
Contact: <sip:63471111@xxxxxxxxxxxx:37000;user=phone>
To: "6591000508"<sip:6591000508@xxxxxxxxxxxxx:5060>;tag=t1170741648- co861
From: <sip:63471111@xxxxxxxxxxxx:37000>;tag=8b03dd2c
Call-ID: 1170741648885806400-0@xxxxxxxxxxx
CSeq: 2 REFER
Subject: callinfo=01103480026010656324137701016NWRK050000002924
Refer-To: <sip:6563241377@xxxxxxxxxxxxx? Replaces=NTcyNDBhZjA1NDIyZWE3OWY5NWM0NGFlNDI0YTY5MGY.!3Bto-tag! 3Dt1170741663-co863!3Bfrom-tag!3D04639a52>
Referred-By: <sip:63471111@xxxxxxxxxxxx:37000;user=phone>
Content-Length: 0



can you see? the Via in refer lack of    "/UDP 192.168.2.143:5060"
                                

        maodonghu
        hhmmdd@xxxxxxx
          2007-02-06

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