[SR-Users] can kamailio send 183 to caller

[SamyGo]

Hi,
I'm not sure if I understood correctly, however, it seems like if UserB is
dialed then send call to FreeSWITCH in parallel to doing an
http_async_query ; once the http query returns a response then send call to
that response.

If I'm correct then you need to make use of branch_route.

route{
...

    append_branch("sip:prompt-tone at freeswitch");
    t_on_branch("api_query");
    route(RELAY);
}

Then create the branch route "api_query" and in there execute your HTTP
async query.
branch_route[api_query]{
         if($rU != "freeswitch")
             route(http_aysnc_things);
}

route[http_async_things]{
   Code example from here:
https://www.kamailio.org/docs/modules/5.1.x/modules/http_async_client.html#http_async_client.f.http_async_query
}

route[HTTP_REPLY] {
    if ($http_ok) {
        xlog("L_INFO", "route[HTTP_REPLY]: status $http_rs body:
$http_rb\n");
        # Assuming the HTTP server replies with a SIP URI
        $ru = $http_rb;
        route(RELAY);
    } else {
        xlog("L_INFO", "route[HTTP_REPLY]: error  $http_err)\n");
    }
}

Thats just my idea , the code might have syntax issues so correct
accordingly. If above works then it should do both ringing and the API
query in parallel. As I see it you're trying to append_branch and then
doing a t_newtran->HTTP ASYNC query, causing the whole blockage and that
explains if you remove the last 4 line it works.

Regards,
Sammy




On Fri, Dec 1, 2017 at 3:14 AM, 赵国杰 <zhaoguojie2010 at 163.com> wrote:

> Hello,
>       I forgot to add route(RELAY) after the append_branch(). This brings
> another problem. Say the original INVITE is from A to B, what I want is:
>           1. fork 1 more INVITE to freeswitch
>           2. discard the original A to B INVITE and wait for the
> http_async_query returns. When returns, the final destiation is determined,
> say C. Then send the INVITE to C.
>
>      However, after append_branch(), then original INVITE is sent to B
> anyway. How do I block the A to B INVITE?
>
> Thanks
>
> At 2017-12-01 15:13:10, "赵国杰" <zhaoguojie2010 at 163.com> wrote:
>
> Hello Sammy,
>      Yes, I want the kamailio to play ring-back music immediately after it
> receive the INVITE.  My plan is to append a branch to freeswitch and let
> freeswitch to play the music. The problem is append_branch() does not work
> in the following context:
>
> if(is_method("INVITE")) {
>                 append_branch("sip:prompt-tone at freeswitch");
>                 xlog("append branch");
>                 t_newtran();
>                 $http_req(hdr) = "Content-Type: application/json";
>                 $http_req(body) = $_s({"cmuid": "$var(cmuid)"});
>                 http_async_query("http://127.0.0.1:8080", "HTTP_REPLY");
> }
>
> if I remove the last 4 lines everything works fine. Otherwise, no forked
> INVITE will be sent to freeswitch. Unfortunately, I need the
> http_async_query to find the proper callee. Any suggestions?
>
> Thanks
>
> At 2017-11-30 23:49:59, "SamyGo" <govoiper at gmail.com> wrote:
>
> Hi,
> While Brandon is right, you can do absolutely do that but w/o any SDP or
> progress media in there. I'd ask why you want to do that! If you want to
> feed some ring-back music I'd advise you to append a branch to a
> media-server like asterisk and then let that do it for you.
>
> So here's one way of doing that.
>
> if(is_method("INVITE")){
>          append_branch("sip:183 at 192.168.1.5:5060");
> ...
> }
>
> where IP is of asterisk and dialplan is configured to provider Progress()
> with media.
>
> Again, it depends on why you want it?
>
> Regards,
> Sammy
>
> On Wed, Nov 29, 2017 at 11:13 PM, Brandon Armstead <brandon at cryy.com>
> wrote:
>
>> if(is_method(“INVITE”)){ .....
>>
>> sl_send_reply(“183”, “Ringing”); ....
>>
>> }
>>
>> On Wed, Nov 29, 2017 at 6:44 PM 赵国杰 <zhaoguojie2010 at 163.com> wrote:
>>
>>> Hello guys,
>>>      Is it possible for kamailio to initiate a 183 to caller?
>>>
>>> Thanks
>>>
>>>
>>>
>>> _______________________________________________
>>> Kamailio (SER) - Users Mailing List
>>> sr-users at lists.kamailio.org
>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>
>> --
>> Sent from Gmail Mobile
>>
>> _______________________________________________
>> 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
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.kamailio.org/pipermail/sr-users/attachments/20171211/bd17f6a1/attachment.html>