62 lines
1.8 KiB
Nix
62 lines
1.8 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}: let
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cfg = config.server.wireguard-netns;
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in {
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options.server.wireguard-netns = {
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enable = lib.mkEnableOption "Enable a network namespace with WireGuard VPN";
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configFile = lib.mkOption {
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type = lib.types.path;
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description = "Path to the WireGuard configuration file (e.g., mullvad.conf)";
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};
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namespace = lib.mkOption {
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type = lib.types.str;
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default = "vpn";
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description = "Name of the network namespace";
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};
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};
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config = lib.mkIf cfg.enable {
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systemd.services."netns@${cfg.namespace}" = {
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description = "WireGuard VPN netns (${cfg.namespace})";
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after = ["network-online.target"];
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wants = ["network-online.target"];
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wantedBy = ["multi-user.target"];
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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ExecStart = pkgs.writeShellScript "netns-${cfg.namespace}-setup" ''
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set -eux
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CONFIG=${cfg.configFile}
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NS=${cfg.namespace}
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ADDR=$(awk -F' *= *' '/^Address/ { print $2 }' "$CONFIG")
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DNS=$(awk -F' *= *' '/^DNS/ { print $2 }' "$CONFIG")
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# Clean up any existing netns
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ip netns delete "$NS" 2>/dev/null || true
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ip netns add "$NS"
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ip link add wg0 type wireguard
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ip link set wg0 netns "$NS"
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ip -n "$NS" addr add "$ADDR" dev wg0
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ip -n "$NS" link set wg0 up
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ip netns exec "$NS" wg setconf wg0 "$CONFIG"
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ip netns exec "$NS" ip link set lo up
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ip netns exec "$NS" ip route add default dev wg0
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# Set DNS
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mkdir -p /etc/netns/"$NS"
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echo "nameserver $DNS" > /etc/netns/"$NS"/resolv.conf
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'';
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ExecStop = pkgs.writeShellScript "netns-${cfg.namespace}-teardown" ''
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ip netns delete ${cfg.namespace} || true
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'';
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};
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};
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};
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}
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