nix/container/Vpn.nix

{ container, pkgs, ... } @args: let
	cfg = container.config.vpn;
in {
	systemd.tmpfiles.rules = container.mkContainerDir cfg [
		"data"
		"data/preshared"
	];

	boot.kernel.sysctl = {
		"net.ipv4.conf.all.src_valid_mark" = 1;
	};

	containers.vpn = container.mkContainer cfg {
		forwardPorts = [
			{
				containerPort = cfg.port;
				hostPort      = cfg.port;
				protocol      = "udp";
			}
		];
		bindMounts = {
			"/var/lib/wireguard" = {
				hostPath   = "${cfg.storage}/data";
				isReadOnly = false;
			};
		};

		config = { ... }: container.mkContainerConfig cfg {
			environment.systemPackages = with pkgs; [ wireguard-tools ];
			networking.useNetworkd = true;
			systemd.network = {
				enable = true;
				netdevs = {
					"50-wg0" = {
						netdevConfig = {
							Kind     = "wireguard";
							MTUBytes = "1300";
							Name     = "wg0";
						};
						wireguardConfig = {
							PrivateKeyFile = "/var/lib/wireguard/privkey";
							ListenPort     = cfg.port;
						};
						wireguardPeers = let
							mkPeer = name: ip: PublicKey: {
								inherit PublicKey;
								PresharedKeyFile = "/var/lib/wireguard/preshared/${name}";
								AllowedIPs = [ "${ip}/32" ];
							};
						in [
							(mkPeer "dashaphone" "10.1.1.3" "O/3y8+QKEY8UoLVlmbc8xdhs248L4wtQcl1MsBBfoQo=")
							(mkPeer "laptop"     "10.1.1.9" "xxoCNPSB86zs8L8p+wXhqaIwpNDkiZu1Yjv8sj8XhgY=")
							(mkPeer "phone"      "10.1.1.5" "bFmFisMqbDpIrAg3o/GiRl9XhceZEVnZtkegZDTL4yg=")
							(mkPeer "tablet"     "10.1.1.6" "BdslswVc9OgUpEhJd0sugDBmYw44DiS0FbUPT5EjOG0=")
							(mkPeer "work"       "10.1.1.2" "Pk0AASSInKO9O8RaQEmm1uNrl0cwWTJDcT8rLn7PSA0=")
						];
					};
				};

				networks.wg0 = {
					matchConfig.Name = "wg0";
					address = ["10.1.1.0/24"];
					networkConfig = {
						IPForward    = true;
						IPMasquerade = "ipv4";
					};
				};
			};
		};
	};
}