[OpenSIPS-Users] Topology Hiding Presence Proxy

[Nathan Baker]

I just wanted to follow up on this one more time with some additional
details.  In the topology hiding tutorial (
http://www.opensips.org/Documentation/Tutorials-Topology-Hiding) it
mentions that presence dialogs should be supported on top of the TM module:

"When running strictly on top of the TM module, the topology hiding SIP
messages will be bigger when compared to the initial requests ( since
OpenSIPS will encode all the needed information in a parameter of the
Contact header ), but all type of SIP requests and dialogs will be
supported ( INVITE dialogs, Presence dialogs, SIP MESSAGE, etc )."


When I attempt to do this, the SUBSCRIBE works fine, but when the NOTIFY
comes back from the server I get errors when it does the
topology_hiding_match(), usually something like:

ERROR:core:parse_params: invalid character, ; expected, found o
ERROR:core:do_parse_rr_body: failed to parse params
ERROR:core:do_parse_rr_body: failed to parse RR headers
ERROR:topology_hiding:topo_no_dlg_seq_handling: failed parsing route set

I can see the th_contact_encode_param value in the request URI, but there
is no route set in the NOTIFY message.  Is it expecting that there is one?
I guess I need to turn on debugging or dig into the topology hiding module
code to see what's causing the errors.  Any help would be greatly
appreciated!

Thanks,
Nate


On Fri, Nov 17, 2017 at 8:57 AM, Nathan Baker <bakern at gmail.com> wrote:

> Hi Bogdan,
>
> Yes, I think that's correct, although I didn't see any module that would
> implement a mid-presence agent.  I don't so much need to hide IPs, but I do
> need to change the Contact header, so I started using topology_hiding for
> that since it has it built in.  I originally tried to use mid_registrar but
> stopped for now because it doesn't store locations in the database and
> doesn't support presence (yet).  Any insight or suggestions would be
> greatly appreciated, I would basically be fine with a B2BUA if there was
> one that did forward registrations and presence.
>
> Thanks,
> Nate
>
>
> On Nov 17, 2017 4:28 AM, "Bogdan-Andrei Iancu" <bogdan at opensips.org>
> wrote:
>
> Hi Nathan,
>
> Based on your description you do not want topology-hiding (to simply hide
> IPs from the end-points), but a mid-presence agent, right ?
>
> Regards,
>
> Bogdan-Andrei Iancu
>   OpenSIPS Founder and Developer
>   http://www.opensips-solutions.com
>
> On 11/17/2017 08:13 AM, Nathan Baker wrote:
>
> Hello,
>
> I have been looking for some examples on how to use the topology hiding
> module and proxying presence (SUBSCRIBE, NOTIFY, etc.) together, similar to
> how the mid_registrar module would handle registrations.  Does anyone have
> any examples or suggestions on how to do this?
>
> I have the clients subscribing to the server (through OpenSIPS proxy to
> another presence server), but I'm not sure how to store the subscriptions
> and how to route the presence messages.  For registrations you can just do
> save("location"), but is there an equivalent for subscriptions/presence?
> It seems like the handle_subscribe() function from the presence module
> wouldn't apply because it's part of a presence server, or can you just use
> it for storing subscriptions but never publish anything?  I don't see a
> function to look up these stored subscriptions.
>
> Would it be better to just assume that the subscriptions are valid and
> relay the messages?  If so, what is the best way to handle the routing?
>
> Any help or insight would be greatly appreciated!
>
> Thanks,
> Nate
>
>
> _______________________________________________
> Users mailing listUsers at lists.opensips.orghttp://lists.opensips.org/cgi-bin/mailman/listinfo/users
>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opensips.org/pipermail/users/attachments/20171120/c930d1eb/attachment.html>