infrastructure/modules/dgn-network.nix

{ config, lib, meta, name, ... }:

let
  inherit (lib)
    mapAttrs'
    mkEnableOption
    mkIf
    optionalAttrs;

  net = meta.network.${name};

  mkAddress = { address, prefixLength, ... }: "${address}/${builtins.toString prefixLength}";
  mkRoute = gateway: { routeConfig = { Gateway = gateway; GatewayOnLink = true; }; };

  mkInterface = interface: net: {
    name = "10-${interface}";
    value = {
      name = interface;
      address = builtins.map mkAddress (net.ipv4 ++ net.ipv6);
      routes = builtins.map mkRoute net.gateways;

      networkConfig = optionalAttrs (net ? DHCP) { inherit (net) DHCP; };
    };
  };

  cfg = config.dgn-network;
in

{
  options.dgn-network.enable = mkEnableOption "automatic network configuration based on metadata" // { default = true; };

  config = mkIf cfg.enable {
    networking = {
      inherit (net) hostId;

      hostName = name;
      domain = "${meta.nodes.${name}.zone}.infra.dgnum.eu";
      useNetworkd = true;

      firewall.logRefusedConnections = false;
    };

    systemd.network.networks = mapAttrs' mkInterface net.interfaces;
  };
}