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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.networking.wireless;
configFile = "/etc/wpa_supplicant.conf";
ifaces =
cfg.interfaces ++
optional (config.networking.WLANInterface != "") config.networking.WLANInterface;
in
{
###### interface
options = {
networking.WLANInterface = mkOption {
default = "";
description = "Obsolete. Use <option>networking.wireless.interfaces</option> instead.";
};
networking.wireless = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to start <command>wpa_supplicant</command> to scan for
and associate with wireless networks. Note: NixOS currently
does not generate <command>wpa_supplicant</command>'s
configuration file, <filename>${configFile}</filename>. You
should edit this file yourself to define wireless networks,
WPA keys and so on (see
<citerefentry><refentrytitle>wpa_supplicant.conf</refentrytitle>
<manvolnum>5</manvolnum></citerefentry>).
'';
};
interfaces = mkOption {
type = types.listOf types.string;
default = [];
example = [ "wlan0" "wlan1" ];
description = ''
The interfaces <command>wpa_supplicant</command> will use. If empty, it will
automatically use all wireless interfaces.
'';
};
driver = mkOption {
type = types.str;
default = "nl80211,wext";
description = "Force a specific wpa_supplicant driver.";
};
userControlled = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Allow normal users to control wpa_supplicant through wpa_gui or wpa_cli.
This is useful for laptop users that switch networks a lot.
When you want to use this, make sure ${configFile} doesn't exist.
It will be created for you.
Currently it is also necessary to explicitly specify networking.wireless.interfaces.
'';
};
group = mkOption {
type = types.str;
default = "wheel";
example = "network";
description = "Members of this group can control wpa_supplicant.";
};
};
};
};
###### implementation
config = mkIf cfg.enable {
environment.systemPackages = [ pkgs.wpa_supplicant ];
services.dbus.packages = [ pkgs.wpa_supplicant ];
# FIXME: start a separate wpa_supplicant instance per interface.
jobs.wpa_supplicant =
{ description = "WPA Supplicant";
wantedBy = [ "network.target" ];
path = [ pkgs.wpa_supplicant ];
preStart = ''
touch -a ${configFile}
chmod 600 ${configFile}
'' + optionalString cfg.userControlled.enable ''
if [ ! -s ${configFile} ]; then
echo "ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=${cfg.userControlled.group}" >> ${configFile}
echo "update_config=1" >> ${configFile}
fi
'';
script =
''
${if ifaces == [] then ''
for i in $(cd /sys/class/net && echo *); do
DEVTYPE=
source /sys/class/net/$i/uevent
if [ "$DEVTYPE" = "wlan" -o -e /sys/class/net/$i/wireless ]; then
ifaces="$ifaces''${ifaces:+ -N} -i$i"
fi
done
'' else ''
ifaces="${concatStringsSep " -N " (map (i: "-i${i}") ifaces)}"
''}
exec wpa_supplicant -s -u -D${cfg.driver} -c ${configFile} $ifaces
'';
};
powerManagement.resumeCommands =
''
${config.systemd.package}/bin/systemctl try-restart wpa_supplicant
'';
assertions = [{ assertion = !cfg.userControlled.enable || cfg.interfaces != [];
message = "user controlled wpa_supplicant needs explicit networking.wireless.interfaces";}];
# Restart wpa_supplicant when a wlan device appears or disappears.
services.udev.extraRules =
''
ACTION=="add|remove", SUBSYSTEM=="net", ENV{DEVTYPE}=="wlan", RUN+="${config.systemd.package}/bin/systemctl try-restart wpa_supplicant.service"
'';
};
}
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