[SR-Users] Altering received parameter in Contact

[David Cunningham]

Great, thanks for letting me know.


On Wed, 30 Jan 2019 at 13:10, Alex Balashov <abalashov at evaristesys.com>
wrote:

> I don't see any issues with it, no...
>
> On Wed, Jan 30, 2019 at 01:06:40PM +1300, David Cunningham wrote:
>
> > Hi Alex,
> >
> > We already had this line in our kamailio.cfg:
> > modparam( "nathelper|registrar", "received_avp", "$avp(RECEIVED)" )
> >
> > We do need to change the received parameter conditionally depending on
> the
> > user agent, and the following seems to work:
> > if ( $ua =~ "ewb2bua" ) {
> >     avp_subst( "$avp(RECEIVED)", "/(.*);transport=TLS/\1/i" );
> > }
> >
> > Can you see any issues with this?
> >
> > Thank you!
> >
> >
> > On Wed, 30 Jan 2019 at 10:50, David Cunningham <
> dcunningham at voisonics.com>
> > wrote:
> >
> > > Hello everyone who replied, and thank you for your advice! We will try
> the
> > > suggestions given.
> > >
> > >
> > > On Wed, 30 Jan 2019 at 01:34, Alex Balashov <abalashov at evaristesys.com
> >
> > > wrote:
> > >
> > >> Hi David,
> > >>
> > >> Well, the registrar's 200 OK should include the very Contact binding
> > >> that was stored for the given AOR, and for a TLS registrant, that's
> > >> going to unavoidably contain the ;transport=TLS attribute, because TLS
> > >> is not the default presumed transport in the absence of a ;transport
> > >> attribute.
> > >>
> > >> If the issue is specifically with the occurrence of ;transport=TLS in
> > >> the 'received' parameter, that can be modulated here:
> > >>
> > >>
> > >>
> https://kamailio.org/docs/modules/5.2.x/modules/registrar.html#registrar.p.received_param
> > >>
> > >> And if it needs to be controlled on a situational/per-registration
> > >> basis, one can use the AVP:
> > >>
> > >>
> > >>
> https://kamailio.org/docs/modules/5.2.x/modules/registrar.html#registrar.p.received_avp
> > >>
> > >> If you set it to empty for a registration from a certain type of
> device,
> > >> the parameter will not be populated and thus not reflected back to the
> > >> registering UA.
> > >>
> > >> -- Alex
> > >>
> > >> On Tue, Jan 29, 2019 at 03:28:38PM +1300, David Cunningham wrote:
> > >>
> > >> > Hello,
> > >> >
> > >> > I'm hoping someone can give advice on altering the received
> parameter in
> > >> > the Contact header on a reply. The situation is that a customer is
> > >> > REGISTERing using TLS, and our Kamailio replies with a 200 OK that
> > >> includes
> > >> > a Contact header like this:
> > >> >
> > >> > Contact: <sip:123456789 at xx.xx.102.10
> > >> >
> > >>
> :5061;transport=tls>;expires=3600;received="sip:xx.xx.102.10:36051;transport=TLS"
> > >> >
> > >> > The customer's device apparently had an issue with this, and the
> device
> > >> > manufacturer advises that they need the ";transport=TLS" on the
> received
> > >> > parameter removed. This sounds like a strange requirement, but it's
> what
> > >> > we've been told. Does anyone know how to alter this in a Kamailio
> > >> > configuration?
> > >> >
> > >> > Our system uses www_authorize to authenticate and is running
> Kamailio
> > >> 4.2.1.
> > >> >
> > >> > Thanks in advance for any help!
> > >> >
> > >> > --
> > >> > David Cunningham, Voisonics Limited
> > >> > http://voisonics.com/
> > >> > USA: +1 213 221 1092
> > >> > New Zealand: +64 (0)28 2558 3782
> > >>
> > >> > _______________________________________________
> > >> > Kamailio (SER) - Users Mailing List
> > >> > sr-users at lists.kamailio.org
> > >> > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
> > >>
> > >>
> > >> --
> > >> Alex Balashov | Principal | Evariste Systems LLC
> > >>
> > >> Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
> > >> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
> > >>
> > >> _______________________________________________
> > >> Kamailio (SER) - Users Mailing List
> > >> sr-users at lists.kamailio.org
> > >> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
> > >>
> > >
> > >
> > > --
> > > David Cunningham, Voisonics Limited
> > > http://voisonics.com/
> > > USA: +1 213 221 1092
> > > New Zealand: +64 (0)28 2558 3782
> > >
> >
> >
> > --
> > David Cunningham, Voisonics Limited
> > http://voisonics.com/
> > USA: +1 213 221 1092
> > New Zealand: +64 (0)28 2558 3782
>
> > _______________________________________________
> > Kamailio (SER) - Users Mailing List
> > sr-users at lists.kamailio.org
> > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>
>
> --
> Alex Balashov | Principal | Evariste Systems LLC
>
> Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
>
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>


-- 
David Cunningham, Voisonics Limited
http://voisonics.com/
USA: +1 213 221 1092
New Zealand: +64 (0)28 2558 3782
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