let generateNodeConf = { lib, pkgs, config, privk, pubk, peerId, nodeId, ...}: { imports = [ common/user-account.nix ]; systemd.services.systemd-networkd.environment.SYSTEMD_LOG_LEVEL = "debug"; networking.useNetworkd = true; networking.useDHCP = false; networking.firewall.enable = false; virtualisation.vlans = [ 1 ]; environment.systemPackages = with pkgs; [ wireguard-tools ]; systemd.network = { enable = true; config = { routeTables.custom = 23; }; netdevs = { "90-wg0" = { netdevConfig = { Kind = "wireguard"; Name = "wg0"; }; wireguardConfig = { # NOTE: we're storing the wireguard private key in the # store for this test. Do not do this in the real # world. Keep in mind the nix store is # world-readable. PrivateKeyFile = pkgs.writeText "wg0-priv" privk; ListenPort = 51820; FirewallMark = 42; }; wireguardPeers = [ {wireguardPeerConfig={ Endpoint = "192.168.1.${peerId}:51820"; PublicKey = pubk; PresharedKeyFile = pkgs.writeText "psk.key" "yTL3sCOL33Wzi6yCnf9uZQl/Z8laSE+zwpqOHC4HhFU="; AllowedIPs = [ "10.0.0.${peerId}/32" ]; PersistentKeepalive = 15; };}]; }; }; networks = { "99-nope" = { matchConfig.Name = "eth*"; linkConfig.Unmanaged = true; }; "90-wg0" = { matchConfig = { Name = "wg0"; }; address = [ "10.0.0.${nodeId}/32" ]; routes = [ { routeConfig = { Gateway = "10.0.0.${nodeId}"; Destination = "10.0.0.0/24"; }; } { routeConfig = { Gateway = "10.0.0.${nodeId}"; Destination = "10.0.0.0/24"; Table = "custom"; }; } ]; }; "30-eth1" = { matchConfig = { Name = "eth1"; }; address = [ "192.168.1.${nodeId}/24" "fe80::${nodeId}/64" ]; routingPolicyRules = [ { routingPolicyRuleConfig = { Table = 10; IncomingInterface = "eth1"; Family = "both"; };} { routingPolicyRuleConfig = { Table = 20; OutgoingInterface = "eth1"; };} { routingPolicyRuleConfig = { Table = 30; From = "192.168.1.1"; To = "192.168.1.2"; SourcePort = 666 ; DestinationPort = 667; };} { routingPolicyRuleConfig = { Table = 40; IPProtocol = "tcp"; InvertRule = true; };} { routingPolicyRuleConfig = { Table = 50; IncomingInterface = "eth1"; Family = "ipv4"; };} ]; }; }; }; }; in import ./make-test-python.nix ({pkgs, ... }: { name = "networkd"; meta = with pkgs.lib.maintainers; { maintainers = [ ninjatrappeur ]; }; nodes = { node1 = { pkgs, ... }@attrs: let localConf = { privk = "GDiXWlMQKb379XthwX0haAbK6hTdjblllpjGX0heP00="; pubk = "iRxpqj42nnY0Qz8MAQbSm7bXxXP5hkPqWYIULmvW+EE="; nodeId = "1"; peerId = "2"; }; in generateNodeConf (attrs // localConf); node2 = { pkgs, ... }@attrs: let localConf = { privk = "eHxSI2jwX/P4AOI0r8YppPw0+4NZnjOxfbS5mt06K2k="; pubk = "27s0OvaBBdHoJYkH9osZpjpgSOVNw+RaKfboT/Sfq0g="; nodeId = "2"; peerId = "1"; }; in generateNodeConf (attrs // localConf); }; testScript = '' start_all() node1.wait_for_unit("systemd-networkd-wait-online.service") node2.wait_for_unit("systemd-networkd-wait-online.service") # ================================ # Networkd Config # ================================ node1.succeed("grep RouteTable=custom:23 /etc/systemd/networkd.conf") node1.succeed("sudo ip route show table custom | grep '10.0.0.0/24 via 10.0.0.1 dev wg0 proto static'") # ================================ # Wireguard # ================================ node1.succeed("ping -c 5 10.0.0.2") node2.succeed("ping -c 5 10.0.0.1") # Is the fwmark set? node2.succeed("wg | grep -q 42") # ================================ # Routing Policies # ================================ # Testing all the routingPolicyRuleConfig members: # Table + IncomingInterface node1.succeed("sudo ip rule | grep 'from all iif eth1 lookup 10'") # OutgoingInterface node1.succeed("sudo ip rule | grep 'from all oif eth1 lookup 20'") # From + To + SourcePort + DestinationPort node1.succeed( "sudo ip rule | grep 'from 192.168.1.1 to 192.168.1.2 sport 666 dport 667 lookup 30'" ) # IPProtocol + InvertRule node1.succeed("sudo ip rule | grep 'not from all ipproto tcp lookup 40'") ''; })