[OpenSIPS-Users] [OpenSIPS-Devel] Why the best response is 408 instead of 486 when parallel forking?

Klaus Darilion klaus.mailinglists at pernau.at
Tue Oct 28 10:34:25 CET 2008



Dan Pascu schrieb:
> On Monday 27 October 2008, Klaus Darilion wrote:
>> Iñaki Baz Castillo wrote:
>>> El Lunes, 27 de Octubre de 2008, Dan Pascu escribió:
>>>> So are you saying that we should base the selection logic in the
>>>> proxy on the assumption that devices are well behaved and won't send
>>>> a 6xx? What if a proxy sends a 6xx because a clueless admin wrote a
>>>> script where he used 6xx because he thought they are better? Will
>>>> you contact all the proxies/devices/gateways out there and ask them
>>>> nicely to fix their behavior because your proxy cannot work
>>>> properly? Don't you see someone's ability to cause DOS using this?
>>> Dan, I'm completely anti-6xx responses, in fact you can read this
>>> thread from me in sip-implementors:
>>>
>>> https://lists.cs.columbia.edu/pipermail/sip-implementors/2008-June/01
>>> 9413.html
>>>
>>> In fact, the only I don't like in my prefer softphone (Twinkle) is
>>> the fact that it uses 603 to decline a call instead of 480/486.
>> If I have a phone in the bed room and in the living room, and I want to
>> reject a call, a 603 is IMO very useful.
> 
> Unless you imposed an embargo in your house :P, someone may way to answer 
> another phone ringing in the living room. All you can say is that I don't 
> want to be disturbed because I'm sleeping, not that none else in the 
> house should receive a call.

so, that is clearly a user preference - so the phone should be 
configureable to allow both - 4xx code or 6xx code. It was just an 
example that IMO 6xx makes sense.

klaus



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