9 Jan
2015
9 Jan
'15
4:22 p.m.
Hello,
where is the media server located and the signaling flow for it?
Cheers,
Daniel
On 09/01/15 14:41, Asgaroth wrote:
Hi,
I am hoping to have the redirect server not be in the signalling path,
so when a media server asterisk/freeswitch sends an invite over to the
redirect server, I need to respond with the 302 and include the
contact information, outbound path (via proxy loadbalancer) and the
recieved information to let the proxy/loadbalancer know where to
forward to.
So when a client registers it comes in like this:
UAC --> Firewall --> Proxy --> Registrar
At this point the registrar stores the recieved host:port of firewall,
and path via the proxy.
When I send a redirect, I want the media server to travers the path
via the route the uac registered with:
uas invite --> redirect server
uas <-- 302
uas invite --> proxy (path) --> firewall (recieved) --> uac
I am not sure how to provide the path information in the 302 response.
I tried to add it as a madd parameter in the contact header but it
then uses the port defined in the host part of the uri as the proxy
port. I cant seem to find a reference as to how to do this.
for example, uac is registered with following info (info manipulated
to protect the poor :) ) and pulled from location table:
Contact:
sip:username@192.168.1.150:55023;rinstance=9dc7a3f0e662b2cd;transport=UDP
Recieved: sip:213.146.165.189:20185
Path: <sip:77.87.89.91;lr;received="sip:213.146.165.189:20185">
I tried to perform a redirect with the following information in the
contact
Contact:
<sip:username@192.168.1.150:55023;rinstance=9dc7a3f0e662b2cd;transport=UDP;received=sip:213.146.165.189:20185,maddr=77.87.89.91>
The problem here is that the media server attempts to send the new
invite to port 55023 at the host specified by the maddr (77.87.89.91)
parameter.
I did some more reading this morning and I can see that the rfc says
that the new invite should be relayed in this manner.
How would I specify the equivilent of $du in a 302 response message?
I hope that explains it a little better.
Thanks
On 09/01/2015 13:14, Daniel-Constantin Mierla wrote:
--
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Hello,
I am not sure if path and received from location will be of any
information for the redirect. At least received is the proto, source and
port of incoming REGISTER. Then, the Path is to be used by location
server when forwarding requests.
Can you give more details of how path and received from location should
be used by the one receiving the 30x redirect?
Cheers,
Daniel
On 08/01/15 22:09, Asgaroth wrote:
> Hi All,
>
> I am attempting to setup a standalone redirect server which will
> lookup contact info and redirect to appropriate outbound proxy.
>
> The problem I am having is that the registrar is storing the path and
> recieved information, however, when I perform a lookup and reply with
> 302, the recieved and path information is not included.
>
> Are there module parameters in the registrar module that will include
> these contact parameters (recieved) or create the appropriate headers
> (path/route) in the 302 response, or, is this something I need to do
> manually.
>
> Currently I have the following lookup code:
>
> route {
>
> t_check_trans();
>
> if ( method == "INVITE" ) {
> xlog("route[MAIN] : $rm : ruri=$ru");
> xlog("route[MAIN] : $rm : lookup=sip:$rU@registered.domain");
> if ( lookup("location", "sip:$rU@registered.domain") ) {
> send_reply("302", "Moved Temporarily");
> exit;
> }
> }
> }
>
> I had a look at the path_mode parameter but this looks like it only
> takes affect for REGISTER methods.
>
> The INVITE that comes in supports the PATH header but I dont see this
> being passed back. In fact, I'm not entirely sure if the path header
> is a supported header in the 302 response message. I had a quick
> google and I cant seem to easily find what headers are suported in the
> 302 message, and where I need to put the path/recieved information. I
> presume I can add the recieved info as a parameter to the contact
> header, but how would i specify the outbound proxy to use, would that
> be in a route or a path header in the 302 response?
>
> I can see that the $du pseudo variable is set with the appropriate
> outbound path and received information, now I just need to include
> this information in the 302 response.
>
> Any suggestions/comments to assist in how I get this info into the 302
> message would be greatly appreciated.
>
> Thanks in advance.
>
>
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