hosts/oignon/wireguard.nix

   1 { pkgs, lib, config, hostName, private, ... }:
   2 let
   3   inherit (config.services) wireguard;
   4   domain = "sourcephile.fr";
   5   iface = "wg-intra";
   6   peer = {
   7     publicKey = "tE4fzqDrr7BgfOo9tWgGnpu3v0JRDEUZbJnm9e2F/GA=";
   8     allowedIPs = [ "192.168.42.3/32" ];
   9   };
  10   keyToUnitName = lib.replaceChars
  11     [ "/" "-"    " "     "+"     "="      ]
  12     [ "-" "\\x2d" "\\x20" "\\x2b" "\\x3d" ];
  13 in
  14 {
  15 services.openssh.listenAddresses = map (ip: {addr=lib.removeSuffix "/32" ip;}) peer.allowedIPs;
  16 networking.firewall.extraCommands = ''
  17   ip46tables -A nixos-fw -i ${iface} -p tcp -m tcp --dport 22 -j ACCEPT
  18 '';
  19 networking.wireguard.interfaces.${iface} = {
  20   ips = peer.allowedIPs;
  21   privateKeyFile = "${private}/${hostName}/wireguard/${iface}/privateKey";
  22   peers = [
  23     {
  24       publicKey = "xsFFep3k8z0pXgUOz4aryOF8l/KPBSOd4WQA26BkXy0=";
  25       endpoint = "losurdo.${domain}:43642";
  26       allowedIPs = [ "192.168.42.2/32" ];
  27       persistentKeepalive = 25;
  28     }
  29   ];
  30 };
  31 networking.hosts = builtins.listToAttrs (lib.concatMap (peer:
  32   let host = lib.removeSuffix ".${domain}:43642" peer.endpoint + ".wg"; in
  33   map (ip: lib.nameValuePair (lib.removeSuffix "/32" ip) [host]) peer.allowedIPs
  34   ) config.networking.wireguard.interfaces.${iface}.peers);
  35 systemd.services = builtins.listToAttrs (map (peer:
  36   lib.nameValuePair "wireguard-${iface}-peer-${keyToUnitName peer.publicKey}"
  37     {
  38       serviceConfig.Restart = "on-failure";
  39       serviceConfig.RestartSec = 15;
  40     }
  41   ) config.networking.wireguard.interfaces.${iface}.peers);
  42 }