pyrox.dev
1# This test runs a Bittorrent tracker on one machine, and verifies
2# that two client machines can download the torrent using
3# `transmission'. The first client (behind a NAT router) downloads
4# from the initial seeder running on the tracker. Then we kill the
5# initial seeder. The second client downloads from the first client,
6# which only works if the first client successfully uses the UPnP-IGD
7# protocol to poke a hole in the NAT.
8
9import ./make-test.nix ({ pkgs, ... }:
10
11let
12
13 # Some random file to serve.
14 file = pkgs.nixUnstable.src;
15
16 miniupnpdConf = nodes: pkgs.writeText "miniupnpd.conf"
17 ''
18 ext_ifname=eth1
19 listening_ip=${(pkgs.lib.head nodes.router.config.networking.interfaces.eth2.ip4).address}/24
20 allow 1024-65535 192.168.2.0/24 1024-65535
21 '';
22
23in
24
25{
26 name = "bittorrent";
27 meta = with pkgs.stdenv.lib.maintainers; {
28 maintainers = [ domenkozar eelco chaoflow rob wkennington ];
29 };
30
31 nodes =
32 { tracker =
33 { config, pkgs, ... }:
34 { environment.systemPackages = [ pkgs.transmission pkgs.opentracker ];
35
36 # We need Apache on the tracker to serve the torrents.
37 services.httpd.enable = true;
38 services.httpd.adminAddr = "foo@example.org";
39 services.httpd.documentRoot = "/tmp";
40
41 networking.firewall.enable = false; # FIXME: figure out what ports we actually need
42 };
43
44 router =
45 { config, pkgs, ... }:
46 { environment.systemPackages = [ pkgs.miniupnpd ];
47 virtualisation.vlans = [ 1 2 ];
48 networking.nat.enable = true;
49 networking.nat.internalInterfaces = [ "eth2" ];
50 networking.nat.externalInterface = "eth1";
51 networking.firewall.enable = false;
52 };
53
54 client1 =
55 { config, pkgs, nodes, ... }:
56 { environment.systemPackages = [ pkgs.transmission ];
57 virtualisation.vlans = [ 2 ];
58 networking.defaultGateway =
59 (pkgs.lib.head nodes.router.config.networking.interfaces.eth2.ip4).address;
60 networking.firewall.enable = false;
61 };
62
63 client2 =
64 { config, pkgs, ... }:
65 { environment.systemPackages = [ pkgs.transmission ];
66 networking.firewall.enable = false;
67 };
68 };
69
70 testScript =
71 { nodes, ... }:
72 ''
73 startAll;
74
75 # Enable NAT on the router and start miniupnpd.
76 $router->waitForUnit("nat");
77 $router->succeed(
78 "iptables -w -t nat -N MINIUPNPD",
79 "iptables -w -t nat -A PREROUTING -i eth1 -j MINIUPNPD",
80 "echo 1 > /proc/sys/net/ipv4/ip_forward",
81 "miniupnpd -f ${miniupnpdConf nodes}"
82 );
83
84 # Create the torrent.
85 $tracker->succeed("mkdir /tmp/data");
86 $tracker->succeed("cp ${file} /tmp/data/test.tar.bz2");
87 $tracker->succeed("transmission-create /tmp/data/test.tar.bz2 -p -t http://${(pkgs.lib.head nodes.tracker.config.networking.interfaces.eth1.ip4).address}:6969/announce -o /tmp/test.torrent");
88 $tracker->succeed("chmod 644 /tmp/test.torrent");
89
90 # Start the tracker. !!! use a less crappy tracker
91 $tracker->waitForUnit("network.target");
92 $tracker->succeed("opentracker -p 6969 >&2 &");
93 $tracker->waitForOpenPort(6969);
94
95 # Start the initial seeder.
96 my $pid = $tracker->succeed("transmission-cli /tmp/test.torrent -M -w /tmp/data >&2 & echo \$!");
97
98 # Now we should be able to download from the client behind the NAT.
99 $tracker->waitForUnit("httpd");
100 $client1->waitForUnit("network.target");
101 $client1->succeed("transmission-cli http://tracker/test.torrent -w /tmp >&2 &");
102 $client1->waitForFile("/tmp/test.tar.bz2");
103 $client1->succeed("cmp /tmp/test.tar.bz2 ${file}");
104
105 # Bring down the initial seeder.
106 $tracker->succeed("kill -9 $pid");
107
108 # Now download from the second client. This can only succeed if
109 # the first client created a NAT hole in the router.
110 $client2->waitForUnit("network.target");
111 $client2->succeed("transmission-cli http://tracker/test.torrent -M -w /tmp >&2 &");
112 $client2->waitForFile("/tmp/test.tar.bz2");
113 $client2->succeed("cmp /tmp/test.tar.bz2 ${file}");
114 '';
115
116})