Hi David,
Can you post somewhere the sip capture (ngrep or pcap) of a whole
SUBSCRIBE/NOTIFY session showing (from opensips perspective) both in and
out pacakges (inital, sequential , the whole dialog) ?
Regards,
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com
On 21.08.2014 19:44, Sidwell, David wrote:
Bogdan,
Yes we do.
We first set the packet forward destination using the drouting module:
route_to_carrier("MGC", "$var(gateway_attrs)", "$var(carrier_attrs)")
Then modify the TO and FROM using the uac module:
construct_uri("sip", "$tU", "$avp(mgc_domain)", "", "", $avp(uri));
uac_replace_to("$avp(uri)");
construct_uri("sip", "$fU", "$avp(mgc_domain)", "", "", $avp(uri));
uac_replace_from("$avp(uri)");
We also replace the contact header, however for that we use the
textops module:
subst('/^Contact: ([^@]*@)[a-zA-Z_0-9.:-]+(.*)$/Contact:
\1$var(contact)\2/ig');
And finally we forward the packet using tm:
if (!t_relay())
{
sl_reply_error();
}
Thanks,
Dave
_______________________________________ _______
**
*Dave Sidwell *| *NEC Enterprise Communication Technologies | Senior
Manager - SW Development*
4 Forest Parkway | Shelton, CT 06484|((O) (203) 926-5424 |((M)
(203) 513-1677 | *[email protected]_
*From:*Bogdan-Andrei Iancu [mailto:[email protected]]
*Sent:* Thursday, August 21, 2014 10:41 AM
*To:* Sidwell, David; OpenSIPS users mailling list
*Subject:* Re: [OpenSIPS-Users] Relay Subscribe/Notify for MWI
David,
Do you use the "uac" module to do the changes over the TO/FROM headers
or ??
Regards,
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com
On 21.08.2014 16:31, Sidwell, David wrote:
Hi Bogdan,
Currently the SUBSCRIBE is not handled locally, but forwarded to a
server which implements RFC 3842.
In my application, the UAC’s register with OpenSIPS (Registrar
module) which in turn registers them with the external server
(Registrant module).
The TO/FROM headers of further requests are modified to reflect
the domain of the server and the requests are forwarded to the server.
In-dialog responses are automatically modified with the reverse
modifications and forwarded back to the UAC.
This works fine for all requests except the SUBSCRIBE/NOTIFY.
Ideally the re-SUBSCRIBE would contain the same modifications, and
the NOTIFY’s would have the reverse modifications.
(I am OK with manually making the transformations, but the
re-SUBSCRIBE’s do not seem to be processed via the route script)
I am open to a solution where opensips handles the subscribes
(presence_mwi?), but I don’t see any way I could retrieve the MWI
indication from the server.
Thanks,
Dave
*From:*Bogdan-Andrei Iancu [mailto:[email protected]]
*Sent:* Thursday, August 21, 2014 3:54 AM
*To:* OpenSIPS users mailling list; Sidwell, David
*Subject:* Re: [OpenSIPS-Users] Relay Subscribe/Notify for MWI
Hi David,
How do you change the TO / FROM hdrs in initial SUBSCRIBE ?? Is
the SUBSCRIBE handled locally (opensips as presence server) or you
forward it further ?
Regards,
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com
On 16.08.2014 00:07, Sidwell, David wrote:
Hello,
I am using OpenSIPS in an application relaying SIP messaging
between clients and server with modifications to the “To”,
“From” and “Contact” headers.
This is working well for call control, however the server
also provides MWI via Subscribe/Notify, and unfortunately this
does not work properly.
There are two basic issues:
1.Although the initial SUBSCRIBE can be modified and relayed
successfully, it cannot create a dialog. Any subsequent
“in-dialog” re-subscription messages seem to be automatically
relayed but the “To”, “From” and “Contact” modifications are
not included. These re-subscribes do NOT go through the
configuration file route script so there is no opportunity to
make any additional modifications.
2.“In-dialog” NOTIFY messages from the server do not get
routed back to the client, but appear in the configuration
file route script with “totags”. These can be manually routed
back to the subscriber but any attempt to modify the To and
From headers fails (due to the presence of the totags).
Questions:
-Is there any way to configure OpenSIPS to allow for automatic
relaying of the Subscribe/Notify messages in an application
such as this?
-Is there a way to make use of the Presence modules to achieve
the same function (The server will not issue PUBLISH commands).
Thanks,
Dave
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