[Freeswitch-users] Answer to SIP OPTIONS with RTP Port 0 in SDP

[Anthony Minessale]

Please direct this to https://freeswitch.org/jira


On Fri, Oct 21, 2016 at 1:26 PM, Dominique Jeannerod <
dominique.jeannerod at interact-iv.com> wrote:

> Hello,
>
> i'm facing a strange issue on a trunk (on Internet). Here is the summary
> of the call flow :
> 1. The call is established normally (RTP Ports, Codec). Everything is fine.
> 2. During the call, Freeswitch receives a SIP OPTIONS with the SAME callid
> as the ongoing call.
> 3. Freeswitch answers 200 OK, but with a SDP with a 0 RTP port.
> 4. Our facing SIP Proxy uses 0 for next RTP trafic and then the
> communication continues with no sound
>
> Is this a normal behaviour from Freeswitch ?
> Do I have a possible configuration item to tune for that ?
>
> Here is the SIP OPTIONS part of the SIP trace :
>
>    -----------------------------------------------------------
> -------------
> recv 436 bytes from udp/[PUBLIC_SOURCE_IP]:5060 at 17:20:58.284455:
>    -----------------------------------------------------------
> -------------
>    OPTIONS sip:+3310129144152000 at 10.9.16.171:5060;transport=udp SIP/2.0
>    Via: SIP/2.0/UDP PUBLIC_SOURCE_IP:5060;branch=z9hG4bK72be.d4033057.0
>    To: <sip:+3310129144152000 at domain.net;user=phone>;tag=2tHZ5Xgv3HB8c
>    From: <sip:+33624431415 at domain.net;user=phone>;tag=SD66qua01-
> 7e4e5aa0-0019-088d-0000-0000
>    CSeq: 2 OPTIONS
>    Call-ID: SD66qua01-64e828d3c9030b4024d0e46628fb2949-0000000
>    Max-Forwards: 70
>    Content-Length: 0
>    User-Agent: Keyyo-S5-P
>
>    -----------------------------------------------------------
> -------------
> send 905 bytes to udp/[PUBLIC_SOURCE_IP]:5060 at 17:20:58.289599:
>    -----------------------------------------------------------
> -------------
>    SIP/2.0 200 OK
>    Via: SIP/2.0/UDP PUBLIC_SOURCE_IP:5060;branch=z9hG4bK72be.d4033057.0
>    From: <sip:+33624431415 at domain.net;user=phone>;tag=SD66qua01-
> 7e4e5aa0-0019-088d-0000-0000
>    To: <sip:+3310129144152000 at domain.net;user=phone>;tag=2tHZ5Xgv3HB8c
>    Call-ID: SD66qua01-64e828d3c9030b4024d0e46628fb2949-0000000
>    CSeq: 2 OPTIONS
>    Contact: <sip:+3310129144152000 at FREESWITCH_PUBLIC_IP:5060;
> transport=udp>
>    User-Agent: FreeSWITCH
>    Accept: application/sdp
>    Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REFER,
> NOTIFY
>    Supported: timer, path, replaces
>    Allow-Events: talk, hold, conference, refer
>    Content-Type: application/sdp
>    Content-Length: 256
>
>    v=0
>    o=FreeSWITCH 1476957466 1476957467 IN IP4 FREESWITCH_PUBLIC_IP
>    s=FreeSWITCH
>    c=IN IP4 FREESWITCH_PUBLIC_IP
>    t=0 0
>    m=audio* 0* RTP/AVP 8 101
>    a=rtpmap:8 PCMA/8000
>    a=rtpmap:101 telephone-event/8000
>    a=fmtp:101 0-16
>    a=ptime:20
>    a=rtcp:19369 IN IP4 FREESWITCH_PUBLIC_IP
>    ------------------------------------------------------------------------
>
>
> *Dominique Jeannerod*
>
> *Interact-iv.com*
> Mobile: +33 698 778 763
>
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>
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-- 
Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬

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