[SR-Users] Dialog / BYE

[Brandon Armstead]

Timo,

    It is not equivalent.  Essentially what I see happening is the BYE
packet just comes in - however Kamailio does nothing with it.  It is not
relayed - simply nothing at all happens, on a network level I just see the
BYE coming into the Kamailio proxy and zero response or reaction from
Kamailio.

Sincerely,
Brandon Armstead

On Wed, Nov 2, 2011 at 2:04 PM, Timo Reimann <sr at foo-lounge.de> wrote:

> Hey,
>
>
> Am 02.11.2011 um 08:24 schrieb Brandon Armstead:
> >    Some interesting results indeed.  If I place the same block of code
> with or without dlg_get first then dlg_bye AFTER loose_route -- kamailio
> ignores the packet.
> >
> > If I place it before loose_route WITH dlg_get FIRST - it works as
> expected.
>
> What do you mean by "kamailio ignores the packet"? Is this equivalent to
> what you described initially regarding dialogs that were terminated
> single-sided only?
>
>
> Cheers,
>
> --Timo
>
>
>
> > On Tue, Nov 1, 2011 at 4:42 PM, Timo Reimann <sr at foo-lounge.de> wrote:
> > Hey Brandon,
> >
> >
> > Am 02.11.2011 um 00:32 schrieb Brandon Armstead:
> > >     Thats correct - however I am calling this before loose_route,
> perhaps that is my problem and need for calling dlg_get?  Let me give this
> a go - and I will respond back with my findings, thanks!
> >
> > Yeah, that should be it -- linking to the currently active dialog is
> being implemented as a callback to record-routed messages which takes place
> after a call to loose_route().
> >
> > Looking forward to hearing your findings. :)
> >
> >
> > Cheers,
> >
> > --Timo
> >
> >
> >
> > > On Tue, Nov 1, 2011 at 4:21 PM, Timo Reimann <sr at foo-lounge.de> wrote:
> > > Hey Brandon,
> > >
> > >
> > > Am 01.11.2011 um 23:44 schrieb Brandon Armstead:
> > > >     Thank you for the input - I actually just figured out a
> resolution.
> > > >
> > > > Apparently dlg_bye("all") must be called after dlg_get - so what I'm
> doing now is simply checking for request with a special request uri with
> the callid / from tag / to tag in the request that correlates to the call I
> desire to terminate.  I am then feeding $ci, $tt, and $ft into dlg_get and
> then calling dlg_bye("all") - in which Kamailio then proceeds to send BYE
> out to both legs of the call.
> > > >
> > > > I think we can mark this as resolved :).
> > >
> > > OK, very good. :)
> > >
> > > Let me make sure that this isn't a dialog module bug: You are now
> calling dlg_get() followed by dlg_bye() with proper parameters from within
> the Kamailio configuration script? if so, you shouldn't need to call
> dlg_get() in the first place, at least not if you place dlg_bye() after the
> call to loose_route(). Contrary, using certain dialog features (including
> dlg_bye()) from reply routes isn't completely possible yet which could
> explain your findings.
> > >
> > >
> > > Cheers,
> > >
> > > --Timo
> > >
> > >
> > >
> > > > On Tue, Nov 1, 2011 at 3:21 PM, Timo Reimann <sr at foo-lounge.de>
> wrote:
> > > > Hey Brandon,
> > > >
> > > >
> > > > Am 01.11.2011 um 22:48 schrieb Brandon Armstead:
> > > > >     I am attempting to tear down a call with a BYE packet
> generated externally (kind of similar to Kamailio fifo dlg_end_dlg).
> > > > >
> > > > > Let me describe what I am trying to do in more depth and then I
> will continue to tell you the problem I think I am experiencing.
> > > > >
> > > > > [PSTN SIP Proxy] -> [CORE SIP Proxy] -> [REGISTRAR] -> [UAC]
> > > > >
> > > > > So the above layout is the normal call flow / structure of calls
> (incoming when originating from pstn) (outgoing when originating from uac).
> > > > >
> > > > > I then have an "external" host - I am attempting to generate a BYE
> to [CORE SIP Proxy] and have it go both directions [PSTN] + [UAC].
> > > > >
> > > > > So far I am able to get the call to tear down in only a single
> direction (only kill call with PSTN) or (only kill call with UAC).
> > > > >
> > > > > I have not been able to kill both legs of the call.
> > > >
> > > > [snip]
> > > >
> > > >
> > > > > My Question - what am I doing wrong - or what is the best method
> to tackle this task?
> > > >
> > > > If I get you right you are trying to emulate Kamailio's dlg_end_dlg
> functionality without involving Kamailio at all (except for passing forward
> the BYE requests). This makes your question sort of off-topic as processing
> BYE requests is a matter of RFC 3261 alone.
> > > >
> > > > Apart from that, what you could do is take a look at the dialog
> module code and check how it implements dlg_end_dlg. An idea I have what
> you could possibly be doing wrong is not using the CSeq numbers that each
> party expects. I don't have the details at hand but if either CSeq number
> is off your UAs won't accept the BYE request.
> > > >
> > > >
> > > > Cheers,
> > > >
> > > > --Timo
> > >
> >
> >
>
>
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