Hi, I am trying to get the SIMPLE presence of pjsip to work properly with openser as presence. I am, however, facing problems with presence! I am not sure whether the problem is from pjsip or from openser. I know pjsip has been tested for presence functionality but I think there is still something wrong, correct me if I am wrong: Here is a scenario I tried many times to finally acknowledge my observation. (I set pjsip to PUBLISH its status to the presence server). At first as seen in the diagram below, subscriber "A" requests a subscription from the openser server to the presence of buddy "B". The server responds with a 202 OK and then a valid NOTIFY. notice the sequence numbers (CSeq). On the second subscription request (in 600 seconds as set in pjsip) "A" renews its subscription and everything goes well (again notice the CSeqs). Now when Buddy B goes online (or publishes something) the server sends a notify to subscriber "A". Notice the CSeq keeps on increasing; here comes our problem. When Pjsip renews its subscription once again, the old CSeq (of NOTIFY[2]) is used. The server however responds with a notify message with a later CSeq (the correct one I guess) causing the pjsip application to responds with a "500 Invalid CSeq message". What appears is that Pjsip is not keeping track of CSeq numbers not related directly to its subscribe messages. i.e. if it receives NOTIFY messages resulting from buddy publishes and not from its own subscribe requests. Is this really a problem in pjsip or is it the other way around (openser) ? So as I see it, presence in pjsip works properly until the first subscription renewal. (i.e. 600 seconds if kept as default) Hope I made myself clear. Looking forward for your help and feedback. Thanks. Regards, Ramzi (Assume proper receipt of 200 messages, I didn't draw them on this diagram) Subsriber "A" Openser Buddy "B" | | SUBSCRIBE[1]: 8942 | --------------------------------------> | | NOTIFY[1]: 8943 | <------------------------------------ | | | SUBSCRIBE[2]: 8943 (refresh) | --------------------------------------> | | NOTIFY[2]: 8944 | <-------------------------------------- | | | | PUBLISH[1]: (e.g: online) NOTIFY[3]: 8945 | <-------------------------------------- <-------------------------------------- | | PUBLISH[2]: (e.g: busy) NOTIFY[4]: 8946 | <-------------------------------------- <-------------------------------------- | | PUBLISH[3] (e.g: away) NOTIFY[5]: 8947 | <--------------------------------------- <-------------------------------------- | | SUBSCRIBE[3]: 8944 | --------------------------------------> | | NOTIFY[6]: 8945 | <-------------------------------------- | | NOTIFY[7]: Invalid CSeq !!! | -------------------------------------> | Legend: METHOD[occurrence #]: CSeq Ramzi T. Touma Electrical and Computer Engineering American University of Beirut Email: rtt00 at aub.edu.lb <http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org> -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080330/4c0f89ad/attachment-0001.html
