forked from mirrors/nixpkgs
165 lines
5.3 KiB
Nix
165 lines
5.3 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.networking.wireless;
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configFile = if cfg.networks != {} then pkgs.writeText "wpa_supplicant.conf" ''
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${optionalString cfg.userControlled.enable ''
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ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=${cfg.userControlled.group}
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update_config=1''}
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${concatStringsSep "\n" (mapAttrsToList (ssid: networkConfig: let
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psk = if networkConfig.psk != null
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then ''"${networkConfig.psk}"''
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else networkConfig.pskRaw;
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in ''
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network={
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ssid="${ssid}"
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${optionalString (psk != null) ''psk=${psk}''}
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${optionalString (psk == null) ''key_mgmt=NONE''}
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}
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'') cfg.networks)}
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'' else "/etc/wpa_supplicant.conf";
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in {
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options = {
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networking.wireless = {
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enable = mkEnableOption "wpa_supplicant";
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interfaces = mkOption {
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type = types.listOf types.str;
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default = [];
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example = [ "wlan0" "wlan1" ];
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description = ''
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The interfaces <command>wpa_supplicant</command> will use. If empty, it will
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automatically use all wireless interfaces.
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'';
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};
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driver = mkOption {
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type = types.str;
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default = "nl80211,wext";
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description = "Force a specific wpa_supplicant driver.";
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};
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networks = mkOption {
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type = types.attrsOf (types.submodule {
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options = {
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psk = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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The network's pre-shared key in plaintext defaulting
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to being a network without any authentication.
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Be aware that these will be written to the nix store
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in plaintext!
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Mutually exclusive with <varname>pskRaw</varname>.
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'';
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};
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pskRaw = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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The network's pre-shared key in hex defaulting
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to being a network without any authentication.
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Mutually exclusive with <varname>psk</varname>.
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'';
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};
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};
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});
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description = ''
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The network definitions to automatically connect to when
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<command>wpa_supplicant</command> is running. If this
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parameter is left empty wpa_supplicant will use
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/etc/wpa_supplicant.conf as the configuration file.
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'';
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default = {};
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example = literalExample ''
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{ echelon = {
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psk = "abcdefgh";
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};
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"free.wifi" = {};
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}
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'';
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};
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userControlled = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Allow normal users to control wpa_supplicant through wpa_gui or wpa_cli.
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This is useful for laptop users that switch networks a lot and don't want
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to depend on a large package such as NetworkManager just to pick nearby
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access points.
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When using a declarative network specification you cannot persist any
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settings via wpa_gui or wpa_cli.
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'';
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};
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group = mkOption {
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type = types.str;
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default = "wheel";
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example = "network";
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description = "Members of this group can control wpa_supplicant.";
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};
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};
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};
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};
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config = mkIf cfg.enable {
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assertions = flip mapAttrsToList cfg.networks (name: cfg: {
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assertion = cfg.psk == null || cfg.pskRaw == null;
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message = ''networking.wireless."${name}".psk and networking.wireless."${name}".pskRaw are mutually exclusive'';
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});
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environment.systemPackages = [ pkgs.wpa_supplicant ];
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services.dbus.packages = [ pkgs.wpa_supplicant ];
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# FIXME: start a separate wpa_supplicant instance per interface.
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systemd.services.wpa_supplicant = let
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ifaces = cfg.interfaces;
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deviceUnit = interface: [ "sys-subsystem-net-devices-${interface}.device" ];
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in {
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description = "WPA Supplicant";
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after = [ "network-interfaces.target" ] ++ lib.concatMap deviceUnit ifaces;
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requires = lib.concatMap deviceUnit ifaces;
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wantedBy = [ "network.target" ];
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path = [ pkgs.wpa_supplicant ];
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script = ''
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${if ifaces == [] then ''
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for i in $(cd /sys/class/net && echo *); do
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DEVTYPE=
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source /sys/class/net/$i/uevent
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if [ "$DEVTYPE" = "wlan" -o -e /sys/class/net/$i/wireless ]; then
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ifaces="$ifaces''${ifaces:+ -N} -i$i"
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fi
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done
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'' else ''
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ifaces="${concatStringsSep " -N " (map (i: "-i${i}") ifaces)}"
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''}
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exec wpa_supplicant -s -u -D${cfg.driver} -c ${configFile} $ifaces
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'';
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};
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powerManagement.resumeCommands = ''
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${config.systemd.package}/bin/systemctl try-restart wpa_supplicant
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'';
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# Restart wpa_supplicant when a wlan device appears or disappears.
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services.udev.extraRules = ''
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ACTION=="add|remove", SUBSYSTEM=="net", ENV{DEVTYPE}=="wlan", RUN+="${config.systemd.package}/bin/systemctl try-restart wpa_supplicant.service"
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'';
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};
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meta.maintainers = with lib.maintainers; [ globin ];
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}
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