110 lines
2.9 KiB
Nix
110 lines
2.9 KiB
Nix
{
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config,
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lib,
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pkgs,
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util,
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...
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}:
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let
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cfg = config.modules.network.vpn-client;
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vpnIcon = util.glyph [
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"db83"
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"dc9d"
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];
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vpnStatus = pkgs.writeShellScript "waybar-vpn-status" ''
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interface=${lib.escapeShellArg cfg.interface}
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if ! ${lib.getExe' pkgs.iproute2 "ip"} link show dev "$interface" >/dev/null 2>&1; then
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printf '{"text":"","class":"idle"}\n'
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exit 0
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fi
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ipaddr=$(${lib.getExe' pkgs.iproute2 "ip"} -4 -o addr show dev "$interface" | ${lib.getExe' pkgs.gawk "awk"} '{ print $4; exit }')
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${lib.getExe pkgs.jq} -cn \
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--arg text "${vpnIcon}" \
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--arg tooltip "VPN $interface: ''${ipaddr:-no IPv4}" \
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--arg class "active" \
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'{ text: $text, tooltip: $tooltip, class: $class }'
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'';
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in
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{
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options.modules.network.vpn-client = {
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enable = lib.mkEnableOption "a WireGuard VPN client";
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interface = lib.mkOption {
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type = lib.types.str;
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default = "wg-home";
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description = "Names the WireGuard interface.";
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};
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address = lib.mkOption {
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type = lib.types.str;
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example = "10.23.100.3/32";
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description = "Sets the client tunnel address in CIDR notation.";
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};
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sopsFile = lib.mkOption {
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type = lib.types.nullOr lib.types.path;
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default = null;
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description = "Names the encrypted file that contains the WireGuard private key.";
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};
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peer = {
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publicKey = lib.mkOption {
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type = lib.types.str;
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description = "Sets the WireGuard public key for the remote peer.";
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};
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endpoint = lib.mkOption {
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type = lib.types.str;
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example = "203.0.113.10:51820";
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description = "Sets the WireGuard endpoint for the remote peer.";
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};
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};
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};
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config = lib.mkIf cfg.enable {
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assertions = [
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{
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assertion = cfg.sopsFile != null;
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message = "Set modules.network.vpn-client.sopsFile when the VPN client is enabled.";
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}
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];
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sops.secrets.wireguard-home-private-key.sopsFile = cfg.sopsFile;
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registry.shell-shortcut.${config.networking.hostName} = {
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vpn-on = "sudo systemctl start wireguard-${cfg.interface}.target";
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vpn-off = "sudo systemctl stop 'wireguard-${cfg.interface}*.service' wireguard-${cfg.interface}.target";
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};
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registry.waybar.${config.networking.hostName}."custom/vpn" = {
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order = 50;
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settings = {
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return-type = "json";
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exec = "${vpnStatus}";
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interval = 5;
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};
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};
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systemd.targets."wireguard-${cfg.interface}".wantedBy = lib.mkForce [ ];
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networking.wireguard.interfaces.${cfg.interface} = {
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ips = [ cfg.address ];
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mtu = 1280;
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privateKeyFile = config.sops.secrets.wireguard-home-private-key.path;
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peers = [
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{
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inherit (cfg.peer) publicKey endpoint;
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allowedIPs = [ "10.23.0.0/16" ];
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persistentKeepalive = 25;
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}
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];
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};
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};
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}
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