From: Stephen Hemminger <shemminger@osdl.org>
To: Ulrich Drepper <drepper@redhat.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: inconsistency between SIOCGIFCONF and SIOCGIFNAME
Date: Tue, 29 Jun 2004 09:32:34 -0700 [thread overview]
Message-ID: <20040629093234.459c46c6@dell_ss3.pdx.osdl.net> (raw)
In-Reply-To: <40E0EAC1.50101@redhat.com>
On Mon, 28 Jun 2004 21:06:25 -0700
Ulrich Drepper <drepper@redhat.com> wrote:
> POSIX does not specify the if_indextoname and if_nameindex functions,
> they are only vaguely specified in an RFC. So there is some room for
> interpretation but still I think it is an issue.
>
> If SIOCGIFCONF to query the system's interfaces only active interfaces
> are returned. But SIOCGIFNAME (and SIOCGIFINDEX) allow querying
> interfaces which are down and not fully initialized.
>
> RFC 3493 says if_nameindex should return *all* interfaces. This means
> that neither if_indextoname or if_nametoindex (defined in the same rfc)
> should define more interfaces.
>
The bridge utilities depends on being able to do if_indextoname and
if_nametoindex for interfaces that aren't active to IP. Other non-IP
usage probably does as well.
--
Stephen Hemminger mailto:shemminger@osdl.org
Open Source Development Lab http://developer.osdl.org/shemminger
next prev parent reply other threads:[~2004-06-29 16:32 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-29 4:06 Ulrich Drepper
2004-06-29 8:26 ` David S. Miller
2004-06-29 16:22 ` Ulrich Drepper
2004-06-29 19:09 ` Ulrich Drepper
2004-06-29 21:19 ` David S. Miller
2004-06-30 4:45 ` Ulrich Drepper
2004-06-30 5:10 ` YOSHIFUJI Hideaki / 吉藤英明
2004-06-30 5:13 ` David S. Miller
2004-06-30 7:51 ` Ulrich Drepper
2004-06-30 19:59 ` David S. Miller
2004-06-29 16:32 ` Stephen Hemminger [this message]
2004-06-29 19:11 ` Ulrich Drepper
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