[Freeswitch-users] Eavesdrop results in rewriting RTP sequence numbers on a bridge.

[Anthony Minessale]

My phone seems to think dobtou is a valid word, sorry =D



On Thu, Sep 12, 2013 at 10:22 AM, Richard Brady <rnbrady at gmail.com> wrote:

> Yes, my bad. Misinterpretation of Wireshark graph:
>
>
> https://dl.dropboxusercontent.com/u/51603927/graph_of_media_bug_impact_on_RTP_seqnum.png
>
> Something definitely changes when the media bug is added. I will work out
> what but I think FS is inserting silence frames when the media bug is on,
> and not inserting them when it is off.
>
> Thanks for setting me straight.
>
> On 12 September 2013 13:58, Anthony Minessale <anthony.minessale at gmail.com
> > wrote:
>
>> Seq numbers never are preserved. Again dobtou mean timestamps?
>> On Sep 12, 2013 7:31 AM, "Richard Brady" <rnbrady at gmail.com> wrote:
>>
>>> Thanks.
>>>
>>> I'm not talking about the new stream for the eavesdrop. I'm talking
>>> about the streams on the A and B legs of the bridge.
>>>
>>> I don't see why FS would rewrite sequence numbers on an RTP stream which
>>> it is simply bridging (no transcoding, no muxing, etc). Sequence numbers
>>> allow packet loss to be detected and compensated for. If FS is not running
>>> a JB or PLC then it should leave discontinuous sequence numbers as is so
>>> that a downstream JB / PLC can use them.
>>>
>>> I'll send some Wireshark screenshots shortly. And will double check re
>>> seq num vs timestamps.
>>>
>>> On 11 September 2013 20:19, Anthony Minessale <
>>> anthony.minessale at gmail.com> wrote:
>>>
>>>> Seq numbers are always rewritten.  Maybe you mean timestamps?
>>>> The muxing and recreation of a new media stream requires a newly
>>>> generated stream.  There is not a way around that.
>>>>
>>>>
>>>>
>>>> On Wed, Sep 11, 2013 at 9:29 AM, Richard Brady <rnbrady at gmail.com>wrote:
>>>>
>>>>> Hi guys
>>>>>
>>>>> Seems than running eavesdrop (and potentially other media bugs) on a
>>>>> bridged channel results in the rewriting of sequence numbers on RTP
>>>>> streams, potentially hiding packet loss when it occurs and creating havoc
>>>>> with downstream jitterbuffers.
>>>>>
>>>>> Is there a way to disable this behaviour?
>>>>>
>>>>> Richard
>>>>>
>>>>> --
>>>>> Richard Brady
>>>>> M: +44 (0)7771 623 348
>>>>> T:  +44 (0)20 8144 8160
>>>>> E: rnbrady at gmail.com
>>>>>
>>>>>
>>>>> _________________________________________________________________________
>>>>> Professional FreeSWITCH Consulting Services:
>>>>> consulting at freeswitch.org
>>>>> http://www.freeswitchsolutions.com
>>>>>
>>>>> 
>>>>> 
>>>>>
>>>>> Official FreeSWITCH Sites
>>>>> http://www.freeswitch.org
>>>>> http://wiki.freeswitch.org
>>>>> http://www.cluecon.com
>>>>>
>>>>> 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
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Anthony Minessale II
>>>>
>>>> FreeSWITCH http://www.freeswitch.org/
>>>> ClueCon http://www.cluecon.com/
>>>> Twitter: http://twitter.com/FreeSWITCH_wire
>>>>
>>>> AIM: anthm
>>>> MSN:anthony_minessale at hotmail.com
>>>> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
>>>> IRC: irc.freenode.net #freeswitch
>>>>
>>>> FreeSWITCH Developer Conference
>>>> sip:888 at conference.freeswitch.org
>>>> googletalk:conf+888 at conference.freeswitch.org
>>>> pstn:+19193869900
>>>>
>>>>
>>>> _________________________________________________________________________
>>>> Professional FreeSWITCH Consulting Services:
>>>> consulting at freeswitch.org
>>>> http://www.freeswitchsolutions.com
>>>>
>>>> 
>>>> 
>>>>
>>>> Official FreeSWITCH Sites
>>>> http://www.freeswitch.org
>>>> http://wiki.freeswitch.org
>>>> http://www.cluecon.com
>>>>
>>>> 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
>>>>
>>>>
>>>
>>> _________________________________________________________________________
>>> Professional FreeSWITCH Consulting Services:
>>> consulting at freeswitch.org
>>> http://www.freeswitchsolutions.com
>>>
>>> 
>>> 
>>>
>>> Official FreeSWITCH Sites
>>> http://www.freeswitch.org
>>> http://wiki.freeswitch.org
>>> http://www.cluecon.com
>>>
>>> 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
>>>
>>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> 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
>>
>>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
>
> 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
>
>


-- 
Anthony Minessale II

FreeSWITCH http://www.freeswitch.org/
ClueCon http://www.cluecon.com/
Twitter: http://twitter.com/FreeSWITCH_wire

AIM: anthm
MSN:anthony_minessale at hotmail.com
GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
IRC: irc.freenode.net #freeswitch

FreeSWITCH Developer Conference
sip:888 at conference.freeswitch.org
googletalk:conf+888 at conference.freeswitch.org
pstn:+19193869900
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20130912/2b13e2aa/attachment-0001.html