replaceStrings has been in nix since 2015(nix 1.10)
so it is safe to remove the fallback
d6d5885c15
241 lines
8.9 KiB
Nix
241 lines
8.9 KiB
Nix
{ config, lib, utils, pkgs, ... }:
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with lib;
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let
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cfg = config.networking.supplicant;
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# We must escape interfaces due to the systemd interpretation
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subsystemDevice = interface:
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"sys-subsystem-net-devices-${utils.escapeSystemdPath interface}.device";
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serviceName = iface: "supplicant-${if (iface=="WLAN") then "wlan@" else (
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if (iface=="LAN") then "lan@" else (
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if (iface=="DBUS") then "dbus"
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else (replaceStrings [" "] ["-"] iface)))}";
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# TODO: Use proper privilege separation for wpa_supplicant
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supplicantService = iface: suppl:
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let
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deps = (if (iface=="WLAN"||iface=="LAN") then ["sys-subsystem-net-devices-%i.device"] else (
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if (iface=="DBUS") then ["dbus.service"]
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else (map subsystemDevice (splitString " " iface))))
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++ optional (suppl.bridge!="") (subsystemDevice suppl.bridge);
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ifaceArg = concatStringsSep " -N " (map (i: "-i${i}") (splitString " " iface));
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driverArg = optionalString (suppl.driver != null) "-D${suppl.driver}";
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bridgeArg = optionalString (suppl.bridge!="") "-b${suppl.bridge}";
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confFileArg = optionalString (suppl.configFile.path!=null) "-c${suppl.configFile.path}";
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extraConfFile = pkgs.writeText "supplicant-extra-conf-${replaceStrings [" "] ["-"] iface}" ''
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${optionalString suppl.userControlled.enable "ctrl_interface=DIR=${suppl.userControlled.socketDir} GROUP=${suppl.userControlled.group}"}
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${optionalString suppl.configFile.writable "update_config=1"}
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${suppl.extraConf}
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'';
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in
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{ description = "Supplicant ${iface}${optionalString (iface=="WLAN"||iface=="LAN") " %I"}";
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wantedBy = [ "multi-user.target" ] ++ deps;
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wants = [ "network.target" ];
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bindsTo = deps;
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after = deps;
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before = [ "network.target" ];
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path = [ pkgs.coreutils ];
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preStart = ''
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${optionalString (suppl.configFile.path!=null && suppl.configFile.writable) ''
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(umask 077 && touch -a "${suppl.configFile.path}")
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''}
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${optionalString suppl.userControlled.enable ''
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install -dm770 -g "${suppl.userControlled.group}" "${suppl.userControlled.socketDir}"
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''}
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'';
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serviceConfig.ExecStart = "${pkgs.wpa_supplicant}/bin/wpa_supplicant -s ${driverArg} ${confFileArg} -I${extraConfFile} ${bridgeArg} ${suppl.extraCmdArgs} ${if (iface=="WLAN"||iface=="LAN") then "-i%I" else (if (iface=="DBUS") then "-u" else ifaceArg)}";
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};
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in
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{
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###### interface
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options = {
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networking.supplicant = mkOption {
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type = with types; attrsOf (submodule {
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options = {
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configFile = {
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path = mkOption {
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type = types.nullOr types.path;
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default = null;
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example = literalExpression "/etc/wpa_supplicant.conf";
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description = lib.mdDoc ''
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External `wpa_supplicant.conf` configuration file.
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The configuration options defined declaratively within `networking.supplicant` have
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precedence over options defined in `configFile`.
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'';
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};
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writable = mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc ''
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Whether the configuration file at `configFile.path` should be written to by
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`wpa_supplicant`.
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'';
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};
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};
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extraConf = mkOption {
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type = types.lines;
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default = "";
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example = ''
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ap_scan=1
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device_name=My-NixOS-Device
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device_type=1-0050F204-1
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driver_param=use_p2p_group_interface=1
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disable_scan_offload=1
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p2p_listen_reg_class=81
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p2p_listen_channel=1
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p2p_oper_reg_class=81
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p2p_oper_channel=1
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manufacturer=NixOS
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model_name=NixOS_Unstable
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model_number=2015
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'';
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description = lib.mdDoc ''
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Configuration options for `wpa_supplicant.conf`.
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Options defined here have precedence over options in `configFile`.
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NOTE: Do not write sensitive data into `extraConf` as it will
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be world-readable in the `nix-store`. For sensitive information
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use the `configFile` instead.
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'';
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};
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extraCmdArgs = mkOption {
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type = types.str;
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default = "";
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example = "-e/run/wpa_supplicant/entropy.bin";
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description =
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lib.mdDoc "Command line arguments to add when executing `wpa_supplicant`.";
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};
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driver = mkOption {
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type = types.nullOr types.str;
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default = "nl80211,wext";
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description = lib.mdDoc "Force a specific wpa_supplicant driver.";
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};
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bridge = mkOption {
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type = types.str;
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default = "";
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description = lib.mdDoc "Name of the bridge interface that wpa_supplicant should listen at.";
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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 = lib.mdDoc ''
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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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'';
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};
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socketDir = mkOption {
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type = types.str;
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default = "/run/wpa_supplicant";
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description = lib.mdDoc "Directory of sockets for controlling wpa_supplicant.";
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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 = lib.mdDoc "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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default = { };
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example = literalExpression ''
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{ "wlan0 wlan1" = {
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configFile.path = "/etc/wpa_supplicant.conf";
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userControlled.group = "network";
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extraConf = '''
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ap_scan=1
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p2p_disabled=1
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''';
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extraCmdArgs = "-u -W";
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bridge = "br0";
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};
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}
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'';
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description = lib.mdDoc ''
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Interfaces for which to start {command}`wpa_supplicant`.
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The supplicant is used to scan for and associate with wireless networks,
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or to authenticate with 802.1x capable network switches.
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The value of this option is an attribute set. Each attribute configures a
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{command}`wpa_supplicant` service, where the attribute name specifies
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the name of the interface that {command}`wpa_supplicant` operates on.
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The attribute name can be a space separated list of interfaces.
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The attribute names `WLAN`, `LAN` and `DBUS`
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have a special meaning. `WLAN` and `LAN` are
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configurations for universal {command}`wpa_supplicant` service that is
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started for each WLAN interface or for each LAN interface, respectively.
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`DBUS` defines a device-unrelated {command}`wpa_supplicant`
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service that can be accessed through `D-Bus`.
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'';
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};
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};
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###### implementation
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config = mkIf (cfg != {}) {
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environment.systemPackages = [ pkgs.wpa_supplicant ];
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services.dbus.packages = [ pkgs.wpa_supplicant ];
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systemd.services = mapAttrs' (n: v: nameValuePair (serviceName n) (supplicantService n v)) cfg;
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services.udev.packages = [
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(pkgs.writeTextFile {
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name = "99-zzz-60-supplicant.rules";
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destination = "/etc/udev/rules.d/99-zzz-60-supplicant.rules";
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text = ''
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${flip (concatMapStringsSep "\n") (filter (n: n!="WLAN" && n!="LAN" && n!="DBUS") (attrNames cfg)) (iface:
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flip (concatMapStringsSep "\n") (splitString " " iface) (i: ''
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ACTION=="add", SUBSYSTEM=="net", ENV{INTERFACE}=="${i}", TAG+="systemd", ENV{SYSTEMD_WANTS}+="supplicant-${replaceStrings [" "] ["-"] iface}.service", TAG+="SUPPLICANT_ASSIGNED"''))}
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${optionalString (hasAttr "WLAN" cfg) ''
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ACTION=="add", SUBSYSTEM=="net", ENV{DEVTYPE}=="wlan", TAG!="SUPPLICANT_ASSIGNED", TAG+="systemd", PROGRAM="/run/current-system/systemd/bin/systemd-escape -p %E{INTERFACE}", ENV{SYSTEMD_WANTS}+="supplicant-wlan@$result.service"
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''}
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${optionalString (hasAttr "LAN" cfg) ''
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ACTION=="add", SUBSYSTEM=="net", ENV{DEVTYPE}=="lan", TAG!="SUPPLICANT_ASSIGNED", TAG+="systemd", PROGRAM="/run/current-system/systemd/bin/systemd-escape -p %E{INTERFACE}", ENV{SYSTEMD_WANTS}+="supplicant-lan@$result.service"
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''}
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'';
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})];
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};
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}
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