nix-conf/modules/router/wireguard.nix

73 lines
2.1 KiB
Nix

{ config, lib, pkgs, ... }:
let
vars = import ./vars.nix config;
wg0 = vars.ifs.wg0;
peerIps = ifObj: token: [
"${ifObj.p4}.${toString token}/32"
"${ifObj.p6}:${toString token}:0/112"
"${ifObj.ulaPrefix}:${toString token}:0/112"
];
mkWg0Peer = token: publicKey: {
allowedIPs = peerIps wg0 token;
inherit publicKey;
pskEnabled = true;
};
wg0Peers = {
"Yura-TPX13" = mkWg0Peer 100 "iFdsPYrpw7vsFYYJB4SOTa+wxxGVcmYp9CPxe0P9ewA=";
"Yura-Pixel7Pro" = mkWg0Peer 101 "GPdXxjvnhsyufd2QX/qsR02dinUtPnnxrE66oGt/KyA=";
};
peerSecretName = name: "wg0-peer-${name}-psk";
secrets = config.secrix.services.systemd-networkd.secrets;
in
{
secrix.services.systemd-networkd.secrets = let
pskPeers = lib.attrsets.filterAttrs (name: peer: peer.pskEnabled) wg0Peers;
mapPeer = name: peer: {
name = peerSecretName name;
value.encrypted.file = ./secrets/wireguard/${peerSecretName name}.age;
};
peerSecrets = lib.attrsets.mapAttrs' mapPeer pskPeers;
allSecrets = {
wg0-private-key.encrypted.file = ./secrets/wireguard/wg0-private-key.age;
} // peerSecrets;
setSecretOwnership = name: value: value // {
decrypted.user = "systemd-network";
decrypted.group = "systemd-network";
};
in lib.attrsets.mapAttrs setSecretOwnership allSecrets;
systemd.network.netdevs = {
"10-wg0" = {
netdevConfig = {
Kind = "wireguard";
Name = wg0.name;
};
wireguardConfig = {
PrivateKeyFile = secrets.wg0-private-key.decrypted.path;
ListenPort = wg0.listenPort;
};
wireguardPeers = map (peer: {
AllowedIPs = lib.strings.concatStringsSep "," peer.value.allowedIPs;
PublicKey = peer.value.publicKey;
PresharedKeyFile = if peer.value.pskEnabled then secrets."${peerSecretName peer.name}".decrypted.path else null;
}) (lib.attrsToList wg0Peers);
};
};
systemd.network.networks = {
"10-wg0" = {
matchConfig.Name = "wg0";
networkConfig = {
IPv4Forwarding = true;
IPv6SendRA = false;
Address = [ wg0.addr4Sized wg0.addr6Sized wg0.ulaAddrSized ];
};
};
};
}