# This test predominantly tests systemd-networkd DHCP server, by
# setting up a DHCP server and client, and ensuring they are mutually
# reachable via the DHCP allocated address.
# Two DHCP servers are set up on bridge VLANs, testing to make sure that
# bridge VLAN settings are correctly applied.
#
# br0 ----untagged---v
#                    +---PVID 1+VLAN 2---[bridge]---PVID 2---eth1
# vlan2 ---VLAN 2----^
{ pkgs, ... }:
{
  name = "systemd-networkd-dhcpserver";
  meta = {
    maintainers = [ ];
  };
  nodes = {
    router =
      { config, pkgs, ... }:
      {
        virtualisation.vlans = [ 1 ];
        systemd.services.systemd-networkd.environment.SYSTEMD_LOG_LEVEL = "debug";
        networking = {
          useNetworkd = true;
          useDHCP = false;
          firewall.enable = false;
        };
        systemd.network = {
          netdevs = {
            br0 = {
              enable = true;
              netdevConfig = {
                Name = "br0";
                Kind = "bridge";
              };
              extraConfig = ''
                [Bridge]
                VLANFiltering=yes
                DefaultPVID=none
              '';
            };
            vlan2 = {
              enable = true;
              netdevConfig = {
                Name = "vlan2";
                Kind = "vlan";
              };
              vlanConfig.Id = 2;
            };
          };
          networks = {
            # systemd-networkd will load the first network unit file
            # that matches, ordered lexiographically by filename.
            # /etc/systemd/network/{40-eth1,99-main}.network already
            # exists. This network unit must be loaded for the test,
            # however, hence why this network is named such.
            "01-eth1" = {
              name = "eth1";
              networkConfig.Bridge = "br0";
              bridgeVLANs = [
                {
                  PVID = 2;
                  EgressUntagged = 2;
                }
              ];
            };
            "02-br0" = {
              name = "br0";
              networkConfig = {
                DHCPServer = true;
                Address = "10.0.0.1/24";
                VLAN = [ "vlan2" ];
              };
              dhcpServerConfig = {
                PoolOffset = 100;
                PoolSize = 1;
              };
              bridgeVLANs = [
                {
                  PVID = 1;
                  EgressUntagged = 1;
                }
                { VLAN = 2; }
              ];
            };
            "02-vlan2" = {
              name = "vlan2";
              networkConfig = {
                DHCPServer = true;
                Address = "10.0.2.1/24";
              };
              dhcpServerConfig = {
                PoolOffset = 100;
                PoolSize = 1;
              };
            };
          };
        };
      };

    client =
      { config, pkgs, ... }:
      {
        virtualisation.vlans = [ 1 ];
        systemd.services.systemd-networkd.environment.SYSTEMD_LOG_LEVEL = "debug";
        networking = {
          useNetworkd = true;
          useDHCP = false;
          firewall.enable = false;
          interfaces.eth1.useDHCP = true;
        };
      };
  };
  testScript =
    { ... }:
    ''
      start_all()

      router.systemctl("start network-online.target")
      client.systemctl("start network-online.target")
      router.wait_for_unit("systemd-networkd-wait-online.service")
      client.wait_for_unit("systemd-networkd-wait-online.service")
      client.wait_until_succeeds("ping -c 5 10.0.2.1")
      router.wait_until_succeeds("ping -c 5 10.0.2.100")
    '';
}