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path: root/modules/private/vpn/default.nix
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{ config, pkgs, lib, ... }:
let
  cfg = config.myServices.vpn;
in
{
  options.myServices = {
    vpn.enable = lib.mkEnableOption "Enable vpn service";
  };

  config = lib.mkIf cfg.enable {
    secrets.keys = [
      {
        dest = "tinc/key.priv";
        user = "root";
        group = "root";
        permissions = "0400";
        text = config.myEnv.vpn.eldiron.privateKey;
      }
      {
        dest = "tinc/key.pub";
        user = "root";
        group = "root";
        permissions = "0400";
        text = config.myEnv.vpn.eldiron.publicKey;
      }
    ];
    networking.firewall.allowedTCPPorts = [ 655 1194 ];
    system.activationScripts.tinc = let
      configFiles = pkgs.runCommand "tinc-files" {
        mainInterface = "eth0";
        hostName = "ImmaeEu";
        network = "Immae";
        keyFile = config.secrets.fullPaths."tinc/key.priv";
      } ''
        mkdir -p $out
        for i in ${./tinc}/*; do
          substituteAll $i $out/$(basename $i)
        done
      '';
    in ''
      install -m750 -o root -g root -d /var/lib/tinc/ /var/lib/tinc/Immae
      install -m700 -o root -g root -t /var/lib/tinc/Immae ${configFiles}/{host-*,tinc-*}
      install -m400 -o root -g root -t /var/lib/tinc/Immae ${configFiles}/tinc.conf
      if [ ! -d /var/lib/tinc/Immae/hosts ]; then
        ${pkgs.git}/bin/git clone -b master https://git.immae.eu/perso/Immae/Config/tinc/hosts /var/lib/tinc/Immae/hosts
      fi
    '';

    systemd.services.tinc-Immae = {
      description = "Tinc Daemon - Immae";
      wantedBy = [ "multi-user.target" ];
      after = [ "network.target" ];
      path = [ pkgs.tinc pkgs.bashInteractive pkgs.iproute pkgs.gnused pkgs.gawk pkgs.git pkgs.glibc ];
      serviceConfig = {
        Type = "simple";
        Restart = "always";
        RestartSec = "3";
        ExecStart = "${pkgs.tinc}/bin/tincd -d1 -D -c /var/lib/tinc/Immae --pidfile /run/tinc.Immae.pid";
      };
    };
  };
}