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108 lines
3.6 KiB
Nix
108 lines
3.6 KiB
Nix
# This test runs a Bittorrent tracker on one machine, and verifies
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# that two client machines can download the torrent using
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# `transmission'. The first client (behind a NAT router) downloads
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# from the initial seeder running on the tracker. Then we kill the
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# initial seeder. The second client downloads from the first client,
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# which only works if the first client successfully uses the UPnP-IGD
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# protocol to poke a hole in the NAT.
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{ pkgs, ... }:
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let
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# Some random file to serve.
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file = pkgs.nixUnstable.src;
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miniupnpdConf = nodes: pkgs.writeText "miniupnpd.conf"
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''
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ext_ifname=eth1
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listening_ip=${nodes.router.config.networking.interfaces.eth2.ipAddress}/24
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allow 1024-65535 192.168.2.0/24 1024-65535
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'';
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in
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{
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nodes =
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{ tracker =
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{ config, pkgs, ... }:
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{ environment.systemPackages = [ pkgs.transmission pkgs.bittorrent ];
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# We need Apache on the tracker to serve the torrents.
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services.httpd.enable = true;
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services.httpd.adminAddr = "foo@example.org";
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services.httpd.documentRoot = "/tmp";
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};
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router =
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{ config, pkgs, ... }:
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{ environment.systemPackages = [ pkgs.miniupnpd ];
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virtualisation.vlans = [ 1 2 ];
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networking.nat.enable = true;
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networking.nat.internalIPs = [ "192.168.2.0/24" ];
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networking.nat.externalInterface = "eth1";
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};
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client1 =
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{ config, pkgs, nodes, ... }:
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{ environment.systemPackages = [ pkgs.transmission ];
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virtualisation.vlans = [ 2 ];
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networking.defaultGateway =
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nodes.router.config.networking.interfaces.eth2.ipAddress;
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};
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client2 =
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{ config, pkgs, ... }:
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{ environment.systemPackages = [ pkgs.transmission ];
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};
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};
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testScript =
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{ nodes, ... }:
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''
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startAll;
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# Enable NAT on the router and start miniupnpd.
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$router->waitForUnit("nat");
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$router->succeed(
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"iptables -t nat -N MINIUPNPD",
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"iptables -t nat -A PREROUTING -i eth1 -j MINIUPNPD",
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"echo 1 > /proc/sys/net/ipv4/ip_forward",
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"miniupnpd -f ${miniupnpdConf nodes}"
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);
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# Create the torrent.
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$tracker->succeed("mkdir /tmp/data");
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$tracker->succeed("cp ${file} /tmp/data/test.tar.bz2");
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$tracker->succeed("transmission-create /tmp/data/test.tar.bz2 -t http://tracker:6969/announce -o /tmp/test.torrent");
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$tracker->succeed("chmod 644 /tmp/test.torrent");
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# Start the tracker. !!! use a less crappy tracker
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$tracker->waitForUnit("network.target");
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$tracker->succeed("bittorrent-tracker --port 6969 --dfile /tmp/dstate >&2 &");
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$tracker->waitForOpenPort(6969);
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# Start the initial seeder.
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my $pid = $tracker->succeed("transmission-cli /tmp/test.torrent -M -w /tmp/data >&2 & echo \$!");
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# Now we should be able to download from the client behind the NAT.
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$tracker->waitForUnit("httpd");
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$client1->waitForUnit("network.target");
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$client1->succeed("transmission-cli http://tracker/test.torrent -w /tmp >&2 &");
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$client1->waitForFile("/tmp/test.tar.bz2");
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$client1->succeed("cmp /tmp/test.tar.bz2 ${file}");
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# Bring down the initial seeder.
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$tracker->succeed("kill -9 $pid");
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# Now download from the second client. This can only succeed if
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# the first client created a NAT hole in the router.
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$client2->waitForUnit("network.target");
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$client2->succeed("transmission-cli http://tracker/test.torrent -M -w /tmp >&2 &");
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$client2->waitForFile("/tmp/test.tar.bz2");
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$client2->succeed("cmp /tmp/test.tar.bz2 ${file}");
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'';
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}
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