[asterisk-dev] Asterisk and external SIP subscribtions

[Paul Belanger]

Greetings,

I wanted to ask if there is any sort of design document / work started
on having Asterisk 13 be able to subscribe to external SIP messages
for the purpose of presence (device state).

More and more we are trying to come up with a good way to have
Asterisk be aware of SIP subscriber presence from our proxy (kamailio)
and propagate that information into Asterisk. Today we are using
custom device state and some AMI / console scripts to do this, but its
a pain to maintain / deploy.

So, what we (our company) was planning on doing was funding some
developer to go out and build us something on top of pjproject to
handle this.  Some sort of res_pjsip_foo module to handle presence
from Kamailio.  The question comes up which RFC is should be, but at
this point in time, that's a discussion point.

Talking to matt, I think we want to use the res_pjsip_pubsub.c module,
but need to confirm. And the reason for having this email. So, is
anybody interested in helping us build it?  Both from a design apsect,
so we can get it into Asterisk and / or help find a developer to do
the work / funding?

I see said module having some config file that will allow you to
specific your source, and the domains you which to subscribe too.
Then, when asterisk starts, it sets up the subscriptions and then
listens for the publish and stores them as local (internal) device
states.  I don't really care about adding publish support at this
point in time, simply because everything SIP related is outside
asterisk.

EG:

[example.org]
server = 192.168.1.1
users = *

So, thoughts?  Interested in helping? Want to also fund this venture?

-- 
Paul Belanger | PolyBeacon, Inc.
Jabber: paul.belanger at polybeacon.com | IRC: pabelanger (Freenode)
Github: https://github.com/pabelanger | Twitter: https://twitter.com/pabelanger