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nixos/network-interfaces-systemd: improve default ethernet network matching

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Reliably match physical ethernet interfaces by using `Kind=!*` with `Type=ether`.
This will exclude veth interfaces, which have `Kind=veth`.
This commit is contained in:
Lương Việt Hoàng 2024-10-03 15:52:32 +07:00
parent 8ea3363046
commit 24597e9460
1 changed files with 4 additions and 15 deletions
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19
nixos/modules/tasks/network-interfaces-systemd.nix
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@ -45,25 +45,14 @@ let
genericDhcpNetworks = initrd: mkIf cfg.useDHCP {
networks."99-ethernet-default-dhcp" = {
# We want to match physical ethernet interfaces as commonly
# found on laptops, desktops and servers, to provide an
# "out-of-the-box" setup that works for common cases. This
# heuristic isn't perfect (it could match interfaces with
# custom names that _happen_ to start with en or eth), but
# should be good enough to make the common case easy and can
# be overridden on a case-by-case basis using
# higher-priority networks or by disabling useDHCP.
# Type=ether matches veth interfaces as well, and this is
# more likely to result in interfaces being configured to
# use DHCP when they shouldn't.
matchConfig.Name = ["en*" "eth*"];
matchConfig = {
Type = "ether";
Kind = "!*"; # physical interfaces have no kind
};
DHCP = "yes";
networkConfig.IPv6PrivacyExtensions = "kernel";
};
networks."99-wireless-client-dhcp" = {
# Like above, but this is much more likely to be correct.
matchConfig.WLANInterfaceType = "station";
DHCP = "yes";
networkConfig.IPv6PrivacyExtensions = "kernel";