netdev - Re: [Bugme-new] [Bug 28512] New: IPv6 SLAAC address preferred over static one as source address

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20110329.172000.102543782.davem@davemloft.net>
Date:	Tue, 29 Mar 2011 17:20:00 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	akpm@...ux-foundation.org
Cc:	netdev@...r.kernel.org, bugzilla-daemon@...zilla.kernel.org,
	bugme-daemon@...zilla.kernel.org, ghen@...enet.be
Subject: Re: [Bugme-new] [Bug 28512] New: IPv6 SLAAC address preferred over
 static one as source address

From: Andrew Morton <akpm@...ux-foundation.org>
Date: Mon, 7 Feb 2011 15:20:48 -0800

>> SLAAC addresses will have a limited preferred lifetime (as defined by the
>> router), static addresses will usually have an unlimited preferred lifetime
>> (0).  So it makes a lot of sense to take this preferred lifetime into account
>> for source address selection (how is it otherwise "preferred"?).

This is debatable.

One could just as easily say that an address with a shorter preferred
lifetime has been revalidated more recently, and therefore is more
likely to be uptodate, valid, and lead to a usable path.

I think the lack of specification for the final tie-breaker in the RFC
was intentional :-)

The specification has to address this, and until the situation is more
clear cut than it is now I don't see any benefit for changing Linux's
behavior.  Especially since there is a configuration based workaround
which works for people in the short-term.

But I'm willing to be convinced, and those wanting to convince me can
post a patch for review to netdev@...r.kernel.org :-)
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html