[SR-Users] Add SDP Body

[Nicolas Breuer]

What is the function ?


De : Daniel-Constantin Mierla [mailto:miconda at gmail.com]
Envoyé : jeudi 27 juillet 2017 13:35
À : Nicolas Breuer <Nicolas.Breuer at belcenter.biz>; Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
Objet : Re: [SR-Users] Add SDP Body


Hello,

there is a dedicated function to set the body, do not use append_hf(), because kamailio doesn't detect there is a change of the body and content length is 0.
Cheers,
Daniel
On 27.07.17 13:25, Nicolas Breuer wrote:
Hello Daniel,

I added this

if (status=~"[1][8][0-3]"){
        setflag(22);
        if (is_method("INVITE")) {
        xlog("L_NOTICE", " No SDP");
        append_hf("Content-Type: application/sdp\r\n");
        append_hf("\r\n");
        append_hf("v=0\r\n");
        append_hf("o=XX 10 10 IN IP4    217.112.180.9\r\n");
        append_hf("s=XX \r\n");
        append_hf("c=IN IP4 217.121.180.9\r\n");
        append_hf("t=0 0\r\n");
        append_hf("m=audio 0 RTP/AVP 8 101\r\n");
        append_hf("a=rtpmap:8 PCMA/8000\r\n");
        append_hf("a=rtpmap:101 telephone-event/8000\r\n");
        append_hf("a=fmtp:101 0-15\r\n");
        append_hf("a=sendrecv\r\n");
        append_hf("a=ptime:20\r\n");
        msg_apply_changes();

        rtpproxy_manage("corbf");

        #rtpproxy_stream2uac("/root/wait.wav", "-1");

        }


Seems that proxy was not engaged. -> The port is not altered..
Trace :

Allow: INVITE,ACK,CANCEL,BYE,REGISTER,REFER,INFO,SUBSCRIBE,NOTIFY,PRACK,UPDATE,OPTIONS,MESSAGE,PUBLISH.
Content-Length: 0.
Content-Type: application/sdp.
Server: Belcenter SIP Voice Gateway.
.
v=0.
o=XX 10 10 IN IP4 217.112.180.9.
s=XX .
c=IN IP4 217.121.180.9.
t=0 0.
m=audio 0 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=sendrecv.
a=ptime:20.
.



De : Daniel-Constantin Mierla [mailto:miconda at gmail.com]
Envoyé : jeudi 27 juillet 2017 11:41
À : Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org><mailto:sr-users at lists.kamailio.org>; Nicolas Breuer <Nicolas.Breuer at belcenter.biz><mailto:Nicolas.Breuer at belcenter.biz>
Objet : Re: [SR-Users] Add SDP Body


Hello,

On 27.07.17 09:57, Nicolas Breuer wrote:
Hello,

I'm trying to add a SDP Body on 183 replies.

>From some carriers I don't get any SDP.
The goal is to add SDP , Engage PROXY & stream2uac on all 183 packets without SDP

Do you think it's possible ? :)

it may be possible, if you try to combine adding content-type header and the sdp body, then use msg_apply_changes() inside reply_route{}. Later engage the rtpproxy. However, if you don't know the codecs of caller/callee, it may end in a mismatch.

Just dropping such 183 is not ok? If not, what about turning 183 in an 180? Or setting an SDP with media IP 0.0.0.0 (old on hold style)?

Cheers,
Daniel



--

Daniel-Constantin Mierla

www.twitter.com/miconda<http://www.twitter.com/miconda> -- www.linkedin.com/in/miconda<http://www.linkedin.com/in/miconda>

Kamailio Advanced Training - www.asipto.com<http://www.asipto.com>

Kamailio World Conference - www.kamailioworld.com<http://www.kamailioworld.com>



--

Daniel-Constantin Mierla

www.twitter.com/miconda<http://www.twitter.com/miconda> -- www.linkedin.com/in/miconda<http://www.linkedin.com/in/miconda>

Kamailio Advanced Training - www.asipto.com<http://www.asipto.com>

Kamailio World Conference - www.kamailioworld.com<http://www.kamailioworld.com>
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