linux-kernel - Re: [PATCH net-next v1 2/9] net: dsa: tag

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: <20210403130318.lqkd6id7gehg3bin@skbuf>
Date:   Sat, 3 Apr 2021 16:03:18 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mips@...r.kernel.org
Subject: Re: [PATCH net-next v1 2/9] net: dsa: tag_ar9331: detect IGMP and
 MLD packets

Hi Oleksij,

On Sat, Apr 03, 2021 at 01:48:41PM +0200, Oleksij Rempel wrote:
> The ar9331 switch is not forwarding IGMP and MLD packets if IGMP
> snooping is enabled. This patch is trying to mimic the HW heuristic to take
> same decisions as this switch would do to be able to tell the linux
> bridge if some packet was prabably forwarded or not.
> 
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> ---

I am not familiar with IGMP/MLD, therefore I don't really understand
what problem you are trying to solve.

Your switch has packet traps for IGMP and MLD, ok. So it doesn't forward
them. Must the IGMP/MLD packets be forwarded by an IGMP/MLD snooping
bridge? Which ones and under what circumstances?