[SR-Users] Kamailio + Websocket issues

Thu Mar 25 13:44:05 CET 2021

Use asterisk 13 with chan_sip + PATH

Regardless, it's becoming off-topic as the quarrel is with Asterisk.

On Thu, Mar 25, 2021 at 8:16 AM Vinicius Kwiecien Ruoso <
vinicius at leads2b.com> wrote:

> Hi David,
>
> Each Asterisk is independent in my setup. Also, the issue is with
> calls from Asterisk with destination to a client connected via
> websocket. The browser is not directly connected to Asterisk, but to
> Kamailio.
>
> Thanks,
> Vinicius
>
> On Thu, Mar 25, 2021 at 7:01 AM David Villasmil
> <david.villasmil.work at gmail.com> wrote:
> >
> > Send the invite to all asterisk, whichever has it will respond.
> >
> > On Thu, 25 Mar 2021 at 01:41, Vinicius Kwiecien Ruoso <
> vinicius at leads2b.com> wrote:
> >>
> >> Hi Segiu,
> >>
> >> Yeah, I understand that won't be the way forward, so I need another
> >> way for Kamailio to figure out the route to the websocket when
> >> Asterisk is making the call.
> >>
> >> I've shared my config file, also with some attempts commented in the
> >> previous emails. The alternatives were to use an alias, or an encoded
> >> param. I think the alias would be a better alternative, but could not
> >> get it right yet.
> >>
> >> Greetings,
> >> Vinicius
> >>
> >> On Wed, Mar 24, 2021 at 7:16 PM Sergiu Pojoga <pojogas at gmail.com>
> wrote:
> >> >
> >> > Vinicius,
> >> >
> >> > The obvious is that PATH is broken in Asterisk's PJSIP and they won't
> do anything about it as it's marked "minor". It's been 2 yrs now that me
> and others have reported it.
> >> > [3]
> https://community.asterisk.org/t/wrong-d-uri-for-invites-with-pjsip-and-path/74079
> >> >
> >> > Bottom line: there's nothing wrong with Kamailio. Start looking for a
> workaround, don't bet on Sangoma to fix it any time soon, lol.
> >> >
> >> > Regards,
> >> > --Sergiu
> >> >
> >> >
> >> >
> >> > On Wed, Mar 24, 2021 at 4:52 PM Vinicius Kwiecien Ruoso <
> vinicius at leads2b.com> wrote:
> >> >>
> >> >> Hi!
> >> >>
> >> >> Thanks for the fast response. Sorry about not replying to the correct
> >> >> email, I've just entered the list and was not getting its individual
> >> >> emails.
> >> >>
> >> >> > So it’s an outbound call to a webrtc registered user? If so,
> kamailio
> >> >> > should route it to wherever the called user is registered.
> >> >>
> >> >> Yes, it is a call from the backend Asterisk to a user registered via
> >> >> the websocket. The register is not stored in Kamailio, so it needs to
> >> >> use the information in the INVITE message to be able to route to the
> >> >> correct connection.
> >> >>
> >> >> > you'll need to share your config and logs. This should work in
> your scenario.
> >> >>
> >> >> Turns out looking closer, Asterisk is not respecting the Path
> protocol
> >> >> [1] [2]. In the INVITE sent to Kamailio, there is no information
> about
> >> >> the path in the message.
> >> >>
> >> >> To me the best second approach that should work is the "alias="
> >> >> information in the contact. That makes sense?
> >> >>
> >> >> I'm sharing my current config as an attachment here. I'm new to
> >> >> Kamailio, so I might be missing something really obvious here.
> >> >>
> >> >> [1] https://issues.asterisk.org/jira/browse/ASTERISK-28211
> >> >> [2]
> https://community.asterisk.org/t/pjsip-path-module-issues/88046/12
> >> >>
> >> >> Thanks,
> >> >> Vinicius
> >> >>
> >> >> On Tue, Mar 23, 2021 at 6:43 PM Vinicius Kwiecien Ruoso
> >> >> <vinicius at leads2b.com> wrote:
> >> >> >
> >> >> > Hi!
> >> >> >
> >> >> > I'm using Kamaio in front of multiple Asterisk instances. At this
> >> >> > moment it works as a SIP over Websocket proxy, with rtpengine, for
> >> >> > browser clients to connect to Asterisk using WebRTC. I do not use
> the
> >> >> > registration module of Kamailio, as each backend Asterisk is
> >> >> > independent and handles its own registrations.
> >> >> >
> >> >> > Everything works great when making calls from the browser, and the
> >> >> > routing is correctly executed by Kamailio based on the request SIP
> >> >> > domain. We have an internal routing API that it calls to discover
> >> >> > which backend Asterisk to route the calls.
> >> >> >
> >> >> > The issue I have is when a call initiates from that backend
> Asterisk,
> >> >> > trying to reach a contact that is connected in Kamailio via the
> >> >> > websocket. The Asterisk sends the message to the proxy, and
> Kamailio
> >> >> > must route it to the corresponding websocket.
> >> >> >
> >> >> > I've tried a few approaches:
> >> >> > - using add_contact_alias + handle_ruri_alias: I have the alias
> with
> >> >> > alias=<ip>~<port>~ws in the contact registration, but for some
> reason
> >> >> > handle_ruri_alias cannot use it
> >> >> > - using the Path module on Asterisk, so when registering, the path
> is
> >> >> > recorded and sent back from Asterisk, Kamailio is also not
> respecting
> >> >> > that
> >> >> > - Using contact_param_encode and contact_param_encode and
> >> >> > contact_param_decode_ruri, but the encoded sip address is always
> the
> >> >> > invalid websocket, like sip:58c0ktrg at 5hp0nn5hqqv9.invalid
> ;transport=ws
> >> >> >
> >> >> > None with success. Any hints on that can be wrong? I can share more
> >> >> > detailed information.
> >> >> >
> >> >> > Greetings,
> >> >> > Vinicius
> >> >> _______________________________________________
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> >> >> sr-users at lists.kamailio.org
> >> >> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
> >> >
> >> > _______________________________________________
> >> > Kamailio (SER) - Users Mailing List
> >> > sr-users at lists.kamailio.org
> >> > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
> >>
> >> _______________________________________________
> >> Kamailio (SER) - Users Mailing List
> >> sr-users at lists.kamailio.org
> >> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
> >
> > --
> > Regards,
> >
> > David Villasmil
> > email: david.villasmil.work at gmail.com
> > phone: +34669448337
> > _______________________________________________
> > Kamailio (SER) - Users Mailing List
> > sr-users at lists.kamailio.org
> > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>
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