118 lines
4.4 KiB
Nix
118 lines
4.4 KiB
Nix
# This is a simple distributed test involving a topology with two
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# separate virtual networks - the "inside" and the "outside" - with a
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# client on the inside network, a server on the outside network, and a
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# router connected to both that performs Network Address Translation
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# for the client.
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import ./make-test.nix ({ pkgs, lib, withFirewall, withConntrackHelpers ? false, ... }:
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let
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unit = if withFirewall then "firewall" else "nat";
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routerBase =
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lib.mkMerge [
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{ virtualisation.vlans = [ 2 1 ];
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networking.firewall.enable = withFirewall;
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networking.nat.internalIPs = [ "192.168.1.0/24" ];
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networking.nat.externalInterface = "eth1";
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}
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(lib.optionalAttrs withConntrackHelpers {
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networking.firewall.connectionTrackingModules = [ "ftp" ];
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networking.firewall.autoLoadConntrackHelpers = true;
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})
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];
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in
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{
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name = "nat" + (if withFirewall then "WithFirewall" else "Standalone")
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+ (lib.optionalString withConntrackHelpers "withConntrackHelpers");
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meta = with pkgs.stdenv.lib.maintainers; {
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maintainers = [ eelco rob ];
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};
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nodes =
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{ client =
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{ pkgs, nodes, ... }:
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lib.mkMerge [
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{ virtualisation.vlans = [ 1 ];
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networking.defaultGateway =
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(pkgs.lib.head nodes.router.config.networking.interfaces.eth2.ipv4.addresses).address;
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}
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(lib.optionalAttrs withConntrackHelpers {
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networking.firewall.connectionTrackingModules = [ "ftp" ];
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networking.firewall.autoLoadConntrackHelpers = true;
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})
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];
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router =
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{ ... }: lib.mkMerge [
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routerBase
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{ networking.nat.enable = true; }
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];
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routerDummyNoNat =
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{ ... }: lib.mkMerge [
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routerBase
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{ networking.nat.enable = false; }
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];
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server =
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{ ... }:
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{ virtualisation.vlans = [ 2 ];
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networking.firewall.enable = false;
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services.httpd.enable = true;
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services.httpd.adminAddr = "foo@example.org";
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services.vsftpd.enable = true;
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services.vsftpd.anonymousUser = true;
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};
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};
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testScript =
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{ nodes, ... }: let
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routerDummyNoNatClosure = nodes.routerDummyNoNat.config.system.build.toplevel;
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routerClosure = nodes.router.config.system.build.toplevel;
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in ''
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$client->start;
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$router->start;
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$server->start;
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# The router should have access to the server.
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$server->waitForUnit("network.target");
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$server->waitForUnit("httpd");
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$router->waitForUnit("network.target");
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$router->succeed("curl --fail http://server/ >&2");
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# The client should be also able to connect via the NAT router.
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$router->waitForUnit("${unit}");
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$client->waitForUnit("network.target");
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$client->succeed("curl --fail http://server/ >&2");
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$client->succeed("ping -c 1 server >&2");
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# Test whether passive FTP works.
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$server->waitForUnit("vsftpd");
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$server->succeed("echo Hello World > /home/ftp/foo.txt");
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$client->succeed("curl -v ftp://server/foo.txt >&2");
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# Test whether active FTP works.
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$client->${if withConntrackHelpers then "succeed" else "fail"}(
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"curl -v -P - ftp://server/foo.txt >&2");
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# Test ICMP.
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$client->succeed("ping -c 1 router >&2");
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$router->succeed("ping -c 1 client >&2");
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# If we turn off NAT, the client shouldn't be able to reach the server.
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$router->succeed("${routerDummyNoNatClosure}/bin/switch-to-configuration test 2>&1");
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$client->fail("curl --fail --connect-timeout 5 http://server/ >&2");
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$client->fail("ping -c 1 server >&2");
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# And make sure that reloading the NAT job works.
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$router->succeed("${routerClosure}/bin/switch-to-configuration test 2>&1");
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# FIXME: this should not be necessary, but nat.service is not started because
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# network.target is not triggered
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# (https://github.com/NixOS/nixpkgs/issues/16230#issuecomment-226408359)
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${lib.optionalString (!withFirewall) ''
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$router->succeed("systemctl start nat.service");
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''}
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$client->succeed("curl --fail http://server/ >&2");
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$client->succeed("ping -c 1 server >&2");
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'';
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})
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