[SR-Users] SIP Packet identifier

[Daniel-Constantin Mierla]

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 at 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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sip-router.org/pipermail/sr-users/attachments/20150519/ad475891/attachment.html>