svn commit: r186955 - in head/sys: conf netinet

Julian Elischer julian at
Sat Jan 10 20:39:16 PST 2009

Robert Watson wrote:
> On Sat, 10 Jan 2009, Adrian Chadd wrote:
>> 2009/1/10 Robert Watson <rwatson at>:
>>> I think Julian's analysis, that this is more of an inet option than a 
>>> socket-layer option, seems more appropriate to me, the benefits of 
>>> portability in adopting the API used by OpenBSD/BSDI/etc seem more 
>>> compelling.  We should make sure that, if we move to the socket 
>>> option used on those systems, we block setting it on non-supporting 
>>> protocols, or confusion will result.  In particular, Adrian's change 
>>> only modified IPv4, not IPv6, so until it's implemented on IPv6 it 
>>> shouldn't be possible to set the option.
>> I'm happy to (eventually) also implement the BSDI API once I actually 
>> spend time looking at what the difference in behaviours are. If we're 
>> lucky, the only difference is where the socket option hooks in and the 
>> actual network behaviour is the same.
>> (Meanwhile, I think I have to go off and implement this particular 
>> behaviour in Squid, and see if the OpenBSD support indeed does 
>> function as advertised.)
> If the API turns out to be effectly semantically the same, or better, 
> then I think the suggestion is to entirely replace, rather than 
> supplement, the socket option you just added with it.  There's no point 
> in having pointlessly divergent APIs where it can be avoided.

I think just making the name the same should be enough..

> Robert N M Watson
> Computer Laboratory
> University of Cambridge

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