GNU bug report logs - #52520
Multicast is off by default

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From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: Mathieu Othacehe <othacehe <at> gnu.org>
Cc: Ludovic Courtès <ludo <at> gnu.org>, 52520 <at> debbugs.gnu.org, Julien Lepiller <julien <at> lepiller.eu>
Subject: bug#52520: Multicast is off by default
Date: Mon, 20 Dec 2021 10:29:30 -0500

Hello,

Mathieu Othacehe <othacehe <at> gnu.org> writes:

> Hey,
>
>> Is it #:multicast-on or #:allmulticast-on ?
>
> The "ip link set multicast ..." command corresponds to the the
> IFF_MULTICAST flag hence to the #:multicast-on parameter.
>
>> Anyhow, I suggest adding a ‘multicast?’ field to <network-address>, with
>> #t as its default value, and honoring this.
>
> I'm not sure <network-address> is the right place for this flag. If
> there are two <network-address> records in the same list, one for ipv4
> and one for ipv6 it means that we need to repeat this flag twice.
>
> Same for the MTU, having different MTU for ipv4 and ipv6 addresses
> doesn't have any meaning. The MTU and multicast properties belong to the
> device itself.
>
> I think we should introduce a <network-device> record that would gather
> the properties that can be passed to the "link-set" method of
> Guile-Netlink. The <static-networking> record would point to a unique
> <network-device>. We would remove the device field from
> <network-address>.
>
> Then each <static-networking> service would provision (concat
> 'networking- (network-device-name device)) or something like that, to fix
> https://issues.guix.gnu.org/52511 as well.
>
> How does that sounds?

Seems to have it on the network device would be less surprising, indeed
:-).  It makes sense to me.

Thank you,

Maxim

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