[Freeswitch-users] RTP Media Port = 0 Bug

[Steve Kurzeja]

On Tue, Nov 1, 2011 at 9:00 AM, Michael Toop <michaelt at callall.co.za> wrote:

> Hi Brian,
>
> Surely FS should tear down the call if the media is not suitable?  I now
> see that 'G729a' does not conform to the IANA standard and is wrong.
>
>
Yeh, I've actually seen this issue before in proxy media mode with bad iana
name flag enabled (which actually means fix specifically the string "g729a"
to "g729") where the 200 OK or 183 response with SDP gets broken on the way
back. By broken the SDP on the response to the B leg changes to dynamic
payload type 96 and rtp port 0 instead of payload type 18/non-zero rtp
port.

There's something I think in the sofia libs which is validating the SDP -
even though technically in proxy media mode the codec list should just get
passed through. I haven't yet found exactly where this is yet.



> Let me get the m attribute fixed in the SDP & I will let you know.
>
>

With the correct iana name in the rtpmap then I think your problem will go
away, assuming you control the endpoints in your environment and can change
them to originate the call with the correct iana name in the rtpmap then I
think your problem will go away.

Or you could turn on full media mode too which would solve it but you just
need to be careful with codec negotiation at that point.



> Thanks for the input.
>
> Regards,
>
> Michael
>
> On Mon, Oct 31, 2011 at 4:34 PM, Brian West <brian at freeswitch.org> wrote:
>
>> Its not a bug.  zero is an indication that we rejected the media.
>> /b
>>
>> On Oct 31, 2011, at 6:07 AM, Michael Toop wrote:
>>
>> Hi,
>>
>> Is there someone in the list interested in some consulting work to assist
>> me to get to the bottom of this problem?
>>
>> Happy to pay for assistance here.
>>
>> Thanks,
>>
>> Michael
>>
>>
>>
>>
>> FreeSWITCH-users mailing list
>> FreeSWITCH-users at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>> http://www.freeswitch.org
>>
>>
>
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20111101/3406588b/attachment-0001.html