Adjust buffer sizes

lib/rel/listener.ex

@@ -21,7 +21,7 @@ defmodule Rel.Listener do
   alias ExSTUN.Message.Type
   alias ExSTUN.Message.Attribute.{Username, XORMappedAddress}
 
-  @buf_size 1024 * 1024 * 1024
+  @buf_size 2 * 1024
   @default_alloc_ports MapSet.new(49_152..65_535)
 
   @spec start_link(term()) :: {:ok, pid()}
@@ -42,15 +42,14 @@ defmodule Rel.Listener do
     :ok = :socket.setopt(socket, {:socket, :reuseport}, true)
     :ok = :socket.setopt(socket, {:socket, :rcvbuf}, @buf_size)
     :ok = :socket.setopt(socket, {:socket, :sndbuf}, @buf_size)
-    :ok = :socket.setopt(socket, {:otp, :rcvbuf}, @buf_size)
     :ok = :socket.bind(socket, %{family: :inet, addr: ip, port: port})
 
     spawn(Rel.Monitor, :start, [self(), socket])
 
     recv_loop(socket, id)
   end
 
-  defp recv_loop(socket) do
+  defp recv_loop(socket, id) do
     case :socket.recvfrom(socket) do
       {:ok, {%{addr: client_addr, port: client_port}, packet}} ->
         :telemetry.execute([:listener, :client], %{inbound: byte_size(packet)}, %{listener_id: id})