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{
nixosConfigurations,
machines,
machineConfig,
config,
lib,
...
}:
let
inherit (lib) types;
cfg = config.zpha.configure.netcupTunnel;
in
{
options.zpha.configure.netcupTunnel = {
enable = lib.mkEnableOption "";
addresses = lib.mkOption {
type = types.listOf types.str;
default = [
"${machineConfig.networking.ip6Address}/${toString machineConfig.networking.ip6PrefixLength}"
];
};
wgPrivateKey = lib.mkOption {
type = types.path;
default = config.sops.secrets."wgPrivateKey".path;
};
wgPublicKey = lib.mkOption {
type = types.str;
default = machineConfig.wgPublicKey;
};
};
config = lib.mkIf cfg.enable {
networking.firewall = {
trustedInterfaces = [
"wg-netcup"
"netcup"
];
allowedUDPPorts = [
config.systemd.network.netdevs."15-wg-netcup".wireguardConfig.ListenPort
];
};
systemd.network = {
config.networkConfig = {
IPv6Forwarding = true;
};
netdevs = {
"10-netcup" = lib.mkIf (config.networking.hostName != "sorrah") {
netdevConfig = {
Kind = "dummy";
Name = "netcup";
};
};
"15-wg-netcup" = {
netdevConfig = {
Kind = "wireguard";
Name = "wg-netcup";
};
wireguardConfig = {
PrivateKeyFile = cfg.wgPrivateKey;
ListenPort = 51820;
FirewallMark = 51820;
};
wireguardPeers =
if (config.networking.hostName == "sorrah") then
(lib.pipe nixosConfigurations [
(lib.filterAttrs (name: _: name != config.networking.hostName))
(lib.filterAttrs (_: value: value.config.zpha.configure.netcupTunnel.enable))
(lib.mapAttrsToList (
name: value: {
PublicKey = value.config.zpha.configure.netcupTunnel.wgPublicKey;
AllowedIPs = value.config.zpha.configure.netcupTunnel.addresses;
PersistentKeepalive = 10;
}
))
])
else
[
{
PublicKey = machines.sorrah.wgPublicKey;
Endpoint = "${machines.sorrah.networking.ip4Address}:51820";
AllowedIPs = [ "::/0" ];
PersistentKeepalive = 10;
}
];
};
};
networks = {
"5-primaryInterface" = lib.mkIf (config.networking.hostName == "sorrah") {
networkConfig = {
IPv6ProxyNDP = true;
IPv6ProxyNDPAddress = lib.pipe config.systemd.network.netdevs."15-wg-netcup".wireguardPeers [
(map (element: if element ? AllowedIPs then element.AllowedIPs else [ ]))
lib.flatten
(map (element: builtins.elemAt (lib.strings.splitString "/" element) 0))
];
};
};
"10-netcup" = lib.mkIf (config.networking.hostName != "sorrah") {
enable = true;
name = "netcup";
address = cfg.addresses;
routingPolicyRules = lib.singleton {
From = "2a03:4000:4d:5e:acab::/112";
Table = 1234;
Priority = 2000;
};
};
"15-wg-netcup" = {
matchConfig.Name = "wg-netcup";
linkConfig.RequiredForOnline = false;
}
// (
if (config.networking.hostName == "sorrah") then
{
address = cfg.addresses;
}
else
{
routes = lib.singleton {
Destination = "::/0";
Table = "1234";
};
}
);
};
};
};
}