netdev - Re: [PATCH iproute2-next 1/2] lib: add profinet and ethercat as link layer protocol names

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Date:   Tue, 01 Mar 2022 18:26:10 +0000
From:   daniel@...unwarth.dev
To:     "Stephen Hemminger" <stephen@...workplumber.org>
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH iproute2-next 1/2] lib: add profinet and ethercat as
 link layer protocol names

February 28, 2022 6:21 PM, "Stephen Hemminger" <stephen@...workplumber.org> wrote:
> This is legacy table. Original author did choose to use stanard
> file /etc/ethertypes. Not sure why??

I tried to extend /etc/ethertypes with the following line:
ETHERCAT        88A4    ethercat

I would expect the following command to successfully run:
tc filter add dev eno1 protocol ethercat matchall action drop

Unfortunately all I get is:
Error: argument "ethercat" is wrong: invalid protocol

With my patches applied, the command runs without any error.


I wasn't able to find any hint in the code, where /etc/ethertypes is supposed to be parsed. Could you give me a hint?


Thanks

Daniel