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let
generateNodeConf =
{
lib,
pkgs,
config,
privk,
pubk,
systemdCreds,
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 ];
environment.etc."credstore/network.wireguard.private" = lib.mkIf systemdCreds { text = privk; };
systemd.network = {
enable = true;
config = {
routeTables.custom = 23;
};
netdevs = {
"90-wg0" = {
netdevConfig = {
Kind = "wireguard";
Name = "wg0";
};
wireguardConfig = {
# Test storing wireguard private key using systemd credentials.
PrivateKey = lib.mkIf systemdCreds "@network.wireguard.private";
# 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 = lib.mkIf (!systemdCreds) (pkgs.writeText "wg0-priv" privk);
ListenPort = 51820;
FirewallMark = 42;
};
wireguardPeers = [
{
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.${nodeId}/32" ];
routes = [
{
Gateway = "10.0.0.${nodeId}";
Destination = "10.0.0.0/24";
}
{
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 = [
{
Table = 10;
IncomingInterface = "eth1";
Family = "both";
}
{
Table = 20;
OutgoingInterface = "eth1";
}
{
Table = 30;
From = "192.168.1.1";
To = "192.168.1.2";
SourcePort = 666;
DestinationPort = 667;
}
{
Table = 40;
IPProtocol = "tcp";
InvertRule = true;
}
{
Table = 50;
IncomingInterface = "eth1";
Family = "ipv4";
}
{
Table = 60;
FirewallMark = 4;
}
{
Table = 70;
FirewallMark = "16/0x1f";
}
];
};
};
};
};
in
{ pkgs, ... }:
{
name = "networkd";
meta = with pkgs.lib.maintainers; {
maintainers = [ picnoir ];
};
nodes = {
node1 =
{ pkgs, ... }@attrs:
let
localConf = {
privk = "GDiXWlMQKb379XthwX0haAbK6hTdjblllpjGX0heP00=";
pubk = "iRxpqj42nnY0Qz8MAQbSm7bXxXP5hkPqWYIULmvW+EE=";
systemdCreds = false;
nodeId = "1";
peerId = "2";
};
in
generateNodeConf (attrs // localConf);
node2 =
{ pkgs, ... }@attrs:
let
localConf = {
privk = "eHxSI2jwX/P4AOI0r8YppPw0+4NZnjOxfbS5mt06K2k=";
pubk = "27s0OvaBBdHoJYkH9osZpjpgSOVNw+RaKfboT/Sfq0g=";
systemdCreds = true;
nodeId = "2";
peerId = "1";
};
in
generateNodeConf (attrs // localConf);
};
testScript = ''
start_all()
node1.systemctl("start systemd-networkd-wait-online@eth1.service")
node1.systemctl("start systemd-networkd-wait-online.service")
node1.wait_for_unit("systemd-networkd-wait-online@eth1.service")
node1.wait_for_unit("systemd-networkd-wait-online.service")
node2.systemctl("start systemd-networkd-wait-online@eth1.service")
node2.systemctl("start systemd-networkd-wait-online.service")
node2.wait_for_unit("systemd-networkd-wait-online@eth1.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'")
# FirewallMark without a mask
node1.succeed("sudo ip rule | grep 'from all fwmark 0x4 lookup 60'")
# FirewallMark with a mask
node1.succeed("sudo ip rule | grep 'from all fwmark 0x10/0x1f lookup 70'")
'';
}
|
