From: Brian Haley <brian.haley@hp•com>
To: David Miller <davem@davemloft•net>
Cc: dlstevens@us•ibm.com, enh@google•com, netdev@vger•kernel.org,
netdev-owner@vger•kernel.org
Subject: Re: linux kernel's IPV6_MULTICAST_HOPS default is 64; should be 1?
Date: Wed, 05 May 2010 11:36:31 -0400 [thread overview]
Message-ID: <4BE1907F.40903@hp.com> (raw)
In-Reply-To: <20100504.144647.157477097.davem@davemloft.net>
David Miller wrote:
> From: Brian Haley <brian.haley@hp•com>
> Date: Tue, 04 May 2010 10:40:58 -0400
>
>> Specifying -1 for setsockopt(IPV6_MULTICAST_HOPS) should set the socket
>> value back to the system default value of IPV6_DEFAULT_MCASTHOPS (1).
>>
>> Signed-off-by: Brian Haley <brian.haley@hp•com>
>
> In cast it wasn't clear from my other reply, I'm not applying this
> patch because I intentionally left this behavior there based upon
> some comments from Elliot in that this lets developers get the
> old default by asking for "-1" explicitly with a setsockopt.
I now see that in Elliot's email, but I think it's incorrect. The RFC
says that setting it to -1 should get you the kernel default, which is
now 1. Without this change, setting it to -1 will get you 64, the
old behavior. If the user wants to, they can always just set it to
64 themselves, that's better than assuming when you set it to -1
you're going to get 64.
I'm just trying to make this follow the RFC and behave like other OSes
for consistency.
-Brian
next prev parent reply other threads:[~2010-05-05 15:36 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-04 1:33 linux kernel's IPV6_MULTICAST_HOPS default is 64; should be 1? enh
2010-05-04 2:16 ` Brian Haley
2010-05-04 3:58 ` enh
2010-05-04 6:05 ` David Miller
2010-05-04 6:19 ` enh
2010-05-04 6:22 ` David Miller
2010-05-04 6:27 ` enh
2010-05-04 6:42 ` David Miller
2010-05-04 7:48 ` David Stevens
2010-05-04 7:57 ` David Miller
2010-05-04 14:40 ` Brian Haley
2010-05-04 16:12 ` David Stevens
2010-05-04 16:43 ` Brian Haley
2010-05-04 17:05 ` David Stevens
2010-05-04 21:39 ` David Miller
2010-05-04 21:38 ` David Miller
2010-05-04 21:46 ` David Miller
2010-05-04 22:26 ` enh
2010-05-04 23:07 ` David Miller
2010-05-05 15:36 ` Brian Haley [this message]
2010-05-05 22:00 ` David Miller
2010-05-06 1:50 ` Brian Haley
2010-05-06 7:10 ` David Miller
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