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nixos/wpa_supplicant: escape interface names to listen on

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Systemd provides some functionality to escape strings that are supposed
to be part of a unit name[1]. This seems to be used for interface names
in `sys-subsystem-net-devices-{interface}.device` and breaks
wpa_supplicant if the wireless interface name has a dash which is
encoded to \x2d.

Such an interface name is rather rare, but used i.e. when configuring
multiple wireless interfaces with `networking.wlanInterfaces`[2] to have on
interface for `wpa_supplicant` and another one for `hostapd`.

[1] https://www.freedesktop.org/software/systemd/man/systemd-escape.html
[2] https://nixos.org/nixos/options.html#networking.wlaninterfaces
This commit is contained in:
Maximilian Bosch 2019-01-27 10:55:33 +01:00
parent eb965a4b38
commit acbadcdbba
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1 changed files with 2 additions and 2 deletions
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4
nixos/modules/services/networking/wpa_supplicant.nix
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@ -1,4 +1,4 @@
{ config, lib, pkgs, ... }:
{ config, lib, pkgs, utils, ... }:
with lib;
@ -193,7 +193,7 @@ in {
# FIXME: start a separate wpa_supplicant instance per interface.
systemd.services.wpa_supplicant = let
ifaces = cfg.interfaces;
deviceUnit = interface: [ "sys-subsystem-net-devices-${interface}.device" ];
deviceUnit = interface: [ "sys-subsystem-net-devices-${utils.escapeSystemdPath interface}.device" ];
in {
description = "WPA Supplicant";