fixupj

lib/tcp_proxy.ex

@@ -0,0 +1,28 @@
+defmodule TcpProxy do
+  use GenServer
+
+  def start_link({watch_pid, to_host, to_port}) do
+    GenServer.start_link(__MODULE__, {watch_pid, to_host, to_port})
+  end
+
+  def init({watch_pid, to_host, to_port}) do
+    {:ok, socket} =
+      :gen_tcp.connect(String.to_charlist(to_host), to_port, [:binary, active: true])
+
+    {:ok, {watch_pid, socket}}
+  end
+
+  def handle_info({:tcp, _socket, data}, {watch_pid, _socket} = state) do
+    send(watch_pid, {:send, data})
+    {:noreply, state}
+  end
+
+  def handle_info({:send, data}, {watch_pid, socket} = state) do
+    :gen_tcp.send(socket, data)
+    {:noreply, state}
+  end
+
+  def handle_info({:tcp_closed, _port}, state) do
+    {:stop, :normal, state}
+  end
+end