os/hosts/pie/dhcpd.nix

{
  pkgs,
  adblock-unbound,
  ...
}: {
  networking.firewall.allowedUDPPorts = [67 547];
  networking.firewall.extraInputRules = ''
    ip6 daddr ff02::1:2/128 udp dport 547 accept comment "DHCPv6 server"
  '';

  services.kea.dhcp4 = {
    enable = true;

    settings = {
      interfaces-config = {
        dhcp-socket-type = "raw";
        interfaces = [
          "enabcm6e4ei0"
        ];
      };

      lease-database = {
        name = "/var/lib/kea/dhcp4.leases";
        persist = true;
        type = "memfile";
      };

      rebind-timer = 2000;
      renew-timer = 1000;
      valid-lifetime = 4000;

      subnet4 = [
        {
          subnet = "192.168.178.0/24";
          pools = [
            {pool = "192.168.178.2 - 192.168.178.255";}
          ];

          option-data = [
            {
              name = "domain-name-servers";
              space = "dhcp4";
              csv-format = true;
              data = "192.168.178.2";
              always-send = true;
            }
            {
              name = "routers";
              data = "192.168.178.1";
              always-send = true;
            }
          ];

          reservations = [
            # Pie should set ip itself
            {
              hw-address = "dc:a6:32:5c:31:64";
              ip-address = "192.168.178.2";
            }
            {
              hw-address = "08:f1:ea:97:0f:0c";
              ip-address = "192.168.178.3";
            }
            {
              hw-address = "b8:76:3f:64:a3:64";
              ip-address = "192.168.178.4";
            }
            {
              hw-address = "04:d9:f5:fa:35:f5";
              ip-address = "192.168.178.5";
            }
            {
              hw-address = "48:a4:72:1d:29:32";
              ip-address = "192.168.178.6";
            }
          ];
        }
      ];
    };
  };

  services.kea.dhcp6 = {
    enable = true;
    settings = {
      interfaces-config = {
        interfaces = [
          "enabcm6e4ei0"
        ];
      };

      lease-database = {
        name = "/var/lib/kea/dhcp6.leases";
        persist = true;
        type = "memfile";
      };

      rebind-timer = 2000;
      renew-timer = 1000;
      valid-lifetime = 4000;

      subnet6 = [
        {
          subnet = "2a02:908:5b1:e3c0::/64";

          pools = [
            {pool = "2a02:908:5b1:e3c0::/72";}
          ];

          ddns-qualifying-suffix = "local.";

          option-data = [
            {
              name = "dns-servers";
              data = "2a02:908:5b1:e3c0:2::";
            }
            {
              name = "domain-search";
              data = "local";
            }
          ];

          reservations = [
            {
              hw-address = "08:f1:ea:97:0f:0c";
              ip-addresses = [
                "2a02:908:5b1:e3c0:3::"
              ];
            }
            {
              hw-address = "04:d9:f5:fa:35:f5";
              ip-addresses = [
                "2a02:908:5b1:e3c0:5::"
              ];
            }
            {
              hw-address = "48:a4:72:1d:29:32";
              ip-addresses = [
                "2a02:908:5b1:e3c0:6::"
              ];
            }
          ];
        }
      ];
    };
  };
}