fixup

lib/broker.ex

@@ -1,19 +1,26 @@
 defmodule Broker do
   use GenServer
 
-  def init(opts) do
+  def init({protocol, port, to_host, to_port}) do
     {:ok, listen_socket} =
-      :gen_tcp.listen(opts[:port], [
+      :gen_tcp.listen(port, [
         :binary,
         reuseaddr: true,
         active: false,
         backlog: 100
       ])
 
-    {:ok, opts}
+    {:ok,
+     %{
+       protocol: protocol,
+       port: port,
+       to_host: to_host,
+       to_port: to_port,
+       listen_socket: listen_socket
+     }}
   end
 
-  defp accept_loop(listen_socket) do
+  def accept_loop(listen_socket) do
     case :gen_tcp.accept(listen_socket) do
       {:ok, socket} ->
         spawn(__MODULE__, :handle_client, [socket])