netdev - Re: ping (iputils) review (call for help)

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Date:   Wed, 9 Nov 2022 09:25:15 -0700
From:   David Ahern <dsahern@...il.com>
To:     Petr Vorel <pvorel@...e.cz>, netdev@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Michal Kubecek <mkubecek@...e.cz>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Xin Long <lucien.xin@...il.com>,
        Vasiliy Kulikov <segoon@...nwall.com>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>
Subject: Re: ping (iputils) review (call for help)

On 11/3/22 5:30 AM, Petr Vorel wrote:
> Hi,
> 
> I'm sorry to bother you about userspace. I'm preparing new iputils release and
> I'm not sure about these two patches.  As there has been many regressions,
> review from experts is more than welcome.
> 
> If you have time to review them, it does not matter if you post your
> comments/RBT in github or here (as long as you keep Cc me so that I don't
> overlook it).
> 
> BTW I wonder if it make sense to list Hideaki YOSHIFUJI as NETWORKING
> IPv4/IPv6 maintainer. If I'm not mistaken, it has been a decade since he was active.
> 
> * ping: Call connect() before sending/receiving
> https://github.com/iputils/iputils/pull/391
> => I did not even knew it's possible to connect to ping socket, but looks like
> it works on both raw socket and on ICMP datagram socket.

no strong opinion on this one. A command line option to use connect
might be better than always doing the connect.

> 
> * ping: revert "ping: do not bind to device when destination IP is on device
> https://github.com/iputils/iputils/pull/396
> => the problem has been fixed in mainline and stable/LTS kernels therefore I
> suppose we can revert cc44f4c as done in this PR. It's just a question if we
> should care about people who run new iputils on older (unfixed) kernels.
> 

I agree with this change. If a user opts for device binding, the command
should not try to guess if it is really needed.