liminix/modules/network/link.nix

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{
liminix
, ifwait
, serviceFns
, lib
}:
{
ifname
, devpath ? null
, mtu} :
# if devpath is supplied, we rename the interface at that
# path to have the specified name.
let
inherit (liminix.services) longrun oneshot;
inherit (lib) concatStringsSep;
name = "${ifname}.link";
rename = if devpath != null
then ''
oldname=$(cd /sys${devpath} && cd net/ && echo *)
ip link set ''${oldname} name ${ifname}
''
else "";
in oneshot {
inherit name;
up = ''
${rename}
${liminix.networking.ifup name ifname}
'';
down = "ip link set down dev ${ifname}";
}