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nixpkgs/nixos/tests/bittorrent.nix

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# This test runs a Bittorrent tracker on one machine, and verifies
# that two client machines can download the torrent using
# `transmission'. The first client (behind a NAT router) downloads
# from the initial seeder running on the tracker. Then we kill the
# initial seeder. The second client downloads from the first client,
# which only works if the first client successfully uses the UPnP-IGD
# protocol to poke a hole in the NAT.
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import ./make-test-python.nix ({ pkgs, ... }:
let
# Some random file to serve.
file = pkgs.hello.src;
internalRouterAddress = "192.168.3.1";
internalClient1Address = "192.168.3.2";
externalRouterAddress = "80.100.100.1";
externalClient2Address = "80.100.100.2";
externalTrackerAddress = "80.100.100.3";
download-dir = "/var/lib/transmission/Downloads";
transmissionConfig = { ... }: {
environment.systemPackages = [ pkgs.transmission ];
services.transmission = {
enable = true;
settings = {
dht-enabled = false;
message-level = 3;
inherit download-dir;
};
};
};
in
{
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name = "bittorrent";
meta = with pkgs.lib.maintainers; {
maintainers = [ domenkozar eelco rob bobvanderlinden ];
};
nodes = {
tracker = { pkgs, ... }: {
imports = [ transmissionConfig ];
virtualisation.vlans = [ 1 ];
networking.firewall.enable = false;
networking.interfaces.eth1.ipv4.addresses = [
{ address = externalTrackerAddress; prefixLength = 24; }
];
# We need Apache on the tracker to serve the torrents.
services.httpd = {
enable = true;
virtualHosts = {
"torrentserver.org" = {
adminAddr = "foo@example.org";
documentRoot = "/tmp";
};
};
};
services.opentracker.enable = true;
};
router = { pkgs, nodes, ... }: {
virtualisation.vlans = [ 1 2 ];
networking.nat.enable = true;
networking.nat.internalInterfaces = [ "eth2" ];
networking.nat.externalInterface = "eth1";
networking.firewall.enable = true;
networking.firewall.trustedInterfaces = [ "eth2" ];
networking.interfaces.eth0.ipv4.addresses = [];
networking.interfaces.eth1.ipv4.addresses = [
{ address = externalRouterAddress; prefixLength = 24; }
];
networking.interfaces.eth2.ipv4.addresses = [
{ address = internalRouterAddress; prefixLength = 24; }
];
services.miniupnpd = {
enable = true;
externalInterface = "eth1";
internalIPs = [ "eth2" ];
appendConfig = ''
ext_ip=${externalRouterAddress}
'';
};
};
client1 = { pkgs, nodes, ... }: {
imports = [ transmissionConfig ];
environment.systemPackages = [ pkgs.miniupnpc ];
virtualisation.vlans = [ 2 ];
networking.interfaces.eth0.ipv4.addresses = [];
networking.interfaces.eth1.ipv4.addresses = [
{ address = internalClient1Address; prefixLength = 24; }
];
networking.defaultGateway = internalRouterAddress;
networking.firewall.enable = false;
};
client2 = { pkgs, ... }: {
imports = [ transmissionConfig ];
virtualisation.vlans = [ 1 ];
networking.interfaces.eth0.ipv4.addresses = [];
networking.interfaces.eth1.ipv4.addresses = [
{ address = externalClient2Address; prefixLength = 24; }
];
networking.firewall.enable = false;
};
};
testScript = { nodes, ... }: ''
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start_all()
# Wait for network and miniupnpd.
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router.wait_for_unit("network-online.target")
router.wait_for_unit("miniupnpd")
# Create the torrent.
tracker.succeed("mkdir ${download-dir}/data")
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tracker.succeed(
"cp ${file} ${download-dir}/data/test.tar.bz2"
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)
tracker.succeed(
"transmission-create ${download-dir}/data/test.tar.bz2 --private --tracker http://${externalTrackerAddress}:6969/announce --outfile /tmp/test.torrent"
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)
tracker.succeed("chmod 644 /tmp/test.torrent")
# Start the tracker. !!! use a less crappy tracker
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tracker.wait_for_unit("network-online.target")
tracker.wait_for_unit("opentracker.service")
tracker.wait_for_open_port(6969)
# Start the initial seeder.
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tracker.succeed(
"transmission-remote --add /tmp/test.torrent --no-portmap --no-dht --download-dir ${download-dir}/data"
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)
# Now we should be able to download from the client behind the NAT.
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tracker.wait_for_unit("httpd")
client1.wait_for_unit("network-online.target")
client1.succeed("transmission-remote --add http://${externalTrackerAddress}/test.torrent >&2 &")
client1.wait_for_file("${download-dir}/test.tar.bz2")
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client1.succeed(
"cmp ${download-dir}/test.tar.bz2 ${file}"
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)
# Bring down the initial seeder.
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# tracker.stop_job("transmission")
# Now download from the second client. This can only succeed if
# the first client created a NAT hole in the router.
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client2.wait_for_unit("network-online.target")
client2.succeed(
"transmission-remote --add http://${externalTrackerAddress}/test.torrent --no-portmap --no-dht >&2 &"
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)
client2.wait_for_file("${download-dir}/test.tar.bz2")
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client2.succeed(
"cmp ${download-dir}/test.tar.bz2 ${file}"
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)
'';
})