[OpenSIPS-Users] UPDATE with SDP after 183 Session Progress, allowed?

[Vlad Paiu]

Hello,

Does the UPDATE message not get routed properly ?
That is just a warning message saying it's an unexpected received SIP 
method in dialog early state.

Regards,

Vlad Paiu
OpenSIPS Developer
http://www.opensips-solutions.com


On 06/14/2012 07:35 PM, Andreas Sikkema wrote:
> Hi,
>
> We're running a quite old version of OpenSIPS (1.4 era) and I am
> seeing a rather weird logging when OpenSIPS receives an UPDATE
> message:
> Jun 14 07:18:26 sip2 /usr/sbin/opensips[2023]:
> CRITICAL:dialog:log_next_state_dlg: bogus event 8 in state 2 for dlg
> 0xb073bbf0 [607:2089897759] with clid
> '1382180-54356afb-13c4-50029-12967-1b6df2a9-12967' and tags
> '1324910-54356afb-13c4-50029-12967-ddac1d7-12967' ''
>
> One scenario is where our Cisco AS5350 is sending UPDATE messages when
> a call is being sent from SIP to PSTN via the gateway. This happens
> before the call is answered  after a 183 Session Progress has been
> handled. So far I haven't seen any issues from receiving this form of
> UPDATE message in this, apparently not quite expected, place during
> the call.
>
> The other scenario does give issues. Here a call is made that is
> essentially the same, but the *calling* party sends an UPDATE message
> containing SDP, we get the same line in the logfile, the UPDATE is
> passed on to the recipient, but there's no change to the SDP by the
> mediaproxy dispatcher. The resulting 200 OK (for the UPDATE) from the
> recipient also contains SDP but is again not handled by the mediaproxy
> dispatcher and therefore we get one way audio.
>
> I do have an ACME Packet SBC that is sending the UPDATE containing the
> SDP. I could, in theory, remove the whole SDP body, but that is just
> so icky and I don't quite trust the server behind the SBC to
> understand what is going on. Ignoring a message is not an option
> either and just flat out responding with a 4xx or 5xx also doesn't
> feel quite right.
>
> Will a newer OpenSIPS allow for an UPDATE message between 183 Session
> Progress and the 200 OK for INVITE?
>