Created
May 25, 2014 18:13
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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,80 @@ #Supervisor defmodule Torrentex.TrackerSupervisor do use Supervisor.Behaviour @udp_port 9998 @tcp_port 9999 def start_link do :supervisor.start_link(__MODULE__, []) end def init(_) do IO.inspect "starting tracker supervisor..." supervise([], strategy: :one_for_one) end def start_tracker(:tcp, torrent) do :supervisor.start_child(__MODULE__, worker(Torrentex.TCPTracker, [@tcp_port, torrent], [])) end def start_tracker(:udp, torrent) do IO.inspect "starting udp tracker..." IO.inspect worker(Torrentex.UDPTracker, [@udp_port, torrent], []) :supervisor.start_child(__MODULE__, worker(Torrentex.UDPTracker, [@udp_port, torrent], [])) end end #Gen_Server defmodule Torrentex.UDPTracker do use GenServer.Behaviour alias Torrentex.Url @actions %{:connect => 0, :announce => 1, :scrape => 2, :error => 3} #External API def start_link(port, torrent) do :gen_server.start_link(__MODULE__, [port, torrent], []) end #GenServer Callbacks def init([port, torrent]) do {:ok, socket} = :gen_udp.open(port, [:binary, {:active, true}]) {:ok, %{:socket => socket, :torrent => torrent}, 0} end #Utilities defp generate_transaction_id do :crypto.rand_bytes(4) end #Outgoing messages defp send_message({socket, torrent}, :announce) do [domain, port] = Url.host(torrent[:announce]) :ok = :gen_udp.send(socket, domain, port, "data") end defp send_message({socket, torrent}, :connect) do [domain, port] = Url.host(torrent[:announce]) :ok = :gen_udp.send(socket, domain, port, <<4497486125440::64,@actions[:connect]::32, generate_transaction_id::binary>>) end #initializer def handle_info(:timeout, %{:socket => socket, :torrent => torrent} = state) do send_message({socket, torrent}, :connect) {:noreply, state} end #Incoming messages from socket def handle_info({:udp, _, _ip, _port, packet}, state) do {:noreply, state} end end