netdev - Re: [PATCH net-next 2/3] netlink: specs: update rt-rule src/dst attribute types to support IPv4 addresses

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: <aQsDA7ufLlIwSf1h@fedora>
Date: Wed, 5 Nov 2025 07:55:47 +0000
From: Hangbin Liu <liuhangbin@...il.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: netdev@...r.kernel.org, Donald Hunter <donald.hunter@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>, Jan Stancek <jstancek@...hat.com>,
	"Matthieu Baerts (NGI0)" <matttbe@...nel.org>,
	Asbjørn Sloth Tønnesen <ast@...erby.net>,
	Stanislav Fomichev <sdf@...ichev.me>, Shuah Khan <shuah@...nel.org>,
	Ido Schimmel <idosch@...dia.com>,
	Guillaume Nault <gnault@...hat.com>,
	Petr Machata <petrm@...dia.com>, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH net-next 2/3] netlink: specs: update rt-rule src/dst
 attribute types to support IPv4 addresses

On Tue, Nov 04, 2025 at 04:48:04PM -0800, Jakub Kicinski wrote:
> > Hi Jakub,
> > 
> > I just realize that most of the address/src/dst in rt-addr/route are
> > dual stack. The same with FRA_DST. We can't simply change binary to u32.
> > So can we keep this u32 -> binary change?
> 
> Ah, should have looked at more context..
> Yes, and in that case without the display-hint?

The display-hint is required; otherwise, the displayed src and dst fields
appear as binary data, and setting the rule’s src/dst values also fails. I
haven’t checked the code yet, but with
  - display-hint: ipv4
the IPv6 addresses are also displayed correctly :)

Thanks
Hangbin