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From Jan Kaluža <>
Subject Re: [PATCH] Add "FreeListen" to support IP_FREEBIND
Date Tue, 08 Mar 2016 10:43:19 GMT
On 03/08/2016 10:25 AM, Yann Ylavic wrote:
> On Tue, Mar 8, 2016 at 9:46 AM, Yann Ylavic <> wrote:
>> On Tue, Mar 8, 2016 at 9:28 AM, Jan Kaluža <> wrote:
>>> I have chosen FreeListen over the flags
>> FWIW, should be take the YAD path, I'd prefer ListenFree (over
>> FreeListen) to emphasize on the "Listen directive family" with a
>> prefix...
> Thinking more about this, I think I second Jim on the wish to have a
> single Listen directive with some parameter like
> "options=freebind,backlog:4095,reuseport,...".

Thinking about right syntax for options...

I would personally like something like "Listen [IP-address:]portnumber 
[protocol] [option1] [option2] ...". Do we have list of supported 
protocols by Listen directive, or we support whatever protocol is there?

If we have explicit list of protocols, then the protocols itself could 
become an options.

If not, can it be acceptable, that you always have to define protocol 
when you wan to use options?

Otherwise I can always implement Yann's idea with "Listen 
[IP-address:]portnumber [protocol] [options=[option1,option2,...]]".

Jan Kaluza

> We could then whatever (new) IP option more easily (less docs work...)
> and maybe deprecate ListenBacklog.
> For example, the "reuseport" (SO_REUSEPORT) option seem to be usable
> w/o the current buckets mechanism in latest linux kernels, so indeed
> we may add more and more options there...

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