Hello, indeed there is no guaranteed unique token per SIP packet.
If one wants to identify the transaction, need to look at Call-Id and CSeq, plus Via header (the via is relevant when there is a forking proxy upstream). Regarding the checksum, the upd checksum is not available, but kamailio can also deal with tcp/tls/sctp. You can build md5 or shaX checksums in the configuration file using transformations, see: - http://www.kamailio.org/wiki/cookbooks/devel/transformations#smd5 For example: $(mb{s.md5}). Cheers, Daniel On 19/05/15 07:55, Alex Balashov wrote: > Hello, > > Various GUIDs and other signatures in SIP exist to link branches, > transactions, and dialogs, but none that are uniquely generated per > packet. The best you're going to be able to do is to compute a > checksum, but even that is no guarantee in a REGISTER flow. > > -- > Alex Balashov | Principal | Evariste Systems LLC > 303 Perimeter Center North, Suite 300 > Atlanta, GA 30346 > United States > > Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct) > Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ > > Sent from my BlackBerry. > *From: *jay binks > *Sent: *Tuesday, May 19, 2015 00:47 > *To: *Kamailio (SER) - Users Mailing List > *Reply To: *Kamailio (SER) - Users Mailing List > *Subject: *[SR-Users] SIP Packet identifier > > > So im logging lots of information to Syslog to assist our helpdesk in > diagnosing customer issues. > > Im seeing LOTS of user agents that re-use the sip Call-ID ( especially > in registers ). > What im wanting to be able to do is link a log message ( that I log at > some point in my dialplan ) to a specific SIP packet ( viewed from > voipmonitor, HOMER, wireshark ). > > I cant REALLY see anything in the SIP to uniquely identify a packet, > however if kamailio provided the UDP packet checksum in a pseudo > variable then we could combine that with the sip call-id to hopefully > do what im after. > > does anyone else have any ideas about how do what im after ? > > -- > Sincerely > > Jay > > > > _______________________________________________ > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list > sr-users@lists.sip-router.org > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users -- Daniel-Constantin Mierla http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda Kamailio World Conference, May 27-29, 2015 Berlin, Germany - http://www.kamailioworld.com
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