[SR-Users] Error with ACK from SIPML5

[Jayesh Nambiar]

Hi Daniel,
I checked using the kamcmd command and I see the webrtc connection active.
The ACK comes from the webrtc client but somehow kamailio is unable to
create a via header and forward the request. The ACK coming from webrtc
client is as follows:

SEND: ACK sip:1223 at 126.128.68.8:5065;transport=udp SIP/2.0
Via: SIP/2.0/WS
df7jal23ls0d.invalid;branch=z9hG4bKJ0Qsiuh94B2slPLp19qH;rport
From: "Jayesh"<sip:1000001001 at ghanti.com>;tag=vsTKsfB1ZR8EkHTPqzyc
To: <sip:1223 at ghanti.com>;tag=UQ9veX0vUg7QS
Contact: "Jayesh"<sip:1000001001 at df7jal23ls0d.invalid
;rtcweb-breaker=no;click2call=no;transport=ws>;+g.oma.sip-im;+sip.ice;language="en,fr"
Call-ID: 2c76d5ee-e9d0-7f22-8be2-76e80b4ab48b
CSeq: 42684 ACK
Content-Length: 0
Route: <sip:126.128.68.9:5060;lr;sipml5-outbound;transport=udp>
Max-Forwards: 70
Proxy-Authorization: Digest username="1000001001",realm="ghanti.com
",nonce="UcFsQ1HBaxc84k4N1J00fpVDj9G57x5p",uri="sip:1223 at 126.128.68.8:5065
;transport=udp",response="5b18a2182c335315875224f2244fb48b",algorithm=MD5
Route: <sip:126.128.68.9:8080
;transport=ws;r2=on;lr=on;ftag=vsTKsfB1ZR8EkHTPqzyc;nat=yes>
Route: <sip:126.128.68.9;r2=on;lr=on;ftag=vsTKsfB1ZR8EkHTPqzyc;nat=yes>
User-Agent: IM-client/OMA1.0 sipML5-v1.2013.03.27
Organization: Doubango Telecom

Where 126.128.68.9:5060 is the Kamailio; 126.128.68.8:5065 is a freeswitch
playing music and the request is received on 126.128.68.9:8080 which is
kamailio acting as a websocket server.
Also the connection between Kamailio and Freeswitch is UDP. I am not able
to use the websocket module just because of this small problem caused in
signaling. Any help is really appreciated. Could it be related to the
nathelper module?

Thanks,

--- Jayesh


On Tue, Jun 18, 2013 at 2:17 PM, Daniel-Constantin Mierla <miconda at gmail.com
> wrote:

>  Hello,
>
>
> On 6/14/13 4:52 PM, Jayesh Nambiar wrote:
>
>  Hello All,
> I have a setup which is SIPML5 -> Kamailio(Websocket) -> Freeswitch. All I
> am trying to do is initiate a call from SIPML5 and Play a Music file from
> freeswitch. This works, but the call hangs up after 30 seconds due to ACK
> timeout from from the SIPML5.
>
>  What I can see is the SIPML5 from Chrome does send an ACK on websocket,
> but I see the following error in kamailio syslog:
>
>  *via_builder(): TCP/TLS connection (id: 0) for WebSocket could not be
> found*
> *ERROR: <core> [msg_translator.c:1725]: build_req_buf_from_sip_req():
> could not create Via header*
> *ERROR: <core> [forward.c:607]: forward_request(): ERROR:
> forward_request: building failed*
> *ERROR: sl [sl_funcs.c:371]: sl_reply_error(): ERROR: sl_reply_error
> used: I'm terribly sorry, server error occurred (1/SL)*
>
>  Can someone help me understand what I am missing here and why kamailio
> is not able to create a VIA header to forward this request towards
> freeswitch. I have built a simple config file by following
> https://gist.github.com/jesusprubio/4066845 as reference.
>
>  Any help in understanding this is really appreciated.
>
> looks like the web rtc connection was down (closed by one side or
> interrupted by the network). You can check with kamcmd the list of active
> connections.
>
> Cheers,
> Daniel
>
> --
> Daniel-Constantin Mierla - http://www.asipto.comhttp://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
> Kamailio Advanced Training, San Francisco, USA - June 24-27, 2013
>   * http://asipto.com/u/katu *
>
>
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> sr-users at lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sip-router.org/pipermail/sr-users/attachments/20130619/882e0d08/attachment.html>