Add support NXT_RESUME (#7)

* Add support NXT_RESUME

lib/tres/controller.ex

@@ -14,6 +14,7 @@ defmodule Tres.Controller do
 
       def handler_spec(dpid) do
         {cb_mod, cb_args} = Tres.Utils.get_callback_module()
+
         %{
           id: {__MODULE__, dpid},
           start: {cb_mod, :start_link, [[dpid, cb_args]]},

lib/tres/message_handler_sup.ex

@@ -7,6 +7,7 @@ defmodule Tres.MessageHandlerSup do
 
   def init(_init_args) do
     children = []
+
     Supervisor.init(
       children,
       strategy: :one_for_one,

lib/tres/message_helper.ex

@@ -147,11 +147,16 @@ defmodule Tres.MessageHelper do
           Openflow.MeterMod.new(
             xid: options[:xid] || 0,
             command: :delete,
-            meter_id: options[:meter_id] || 0,
+            meter_id: options[:meter_id] || 0
           )
 
         send_message(meter_mod, datapath_id, options[:blocking] || false)
       end
+
+      defp send_resume(datapath_id, options) do
+        resume = Openflow.NxResume.new(options)
+        send_message(resume, datapath_id, options[:blocking] || false)
+      end
     end
   end
 end

lib/tres/secure_channel.ex

@@ -50,7 +50,7 @@ defmodule Tres.SecureChannel do
         {:tcp, socket, packet},
         state,
         %State{socket: socket, transport: transport} = state_data
-  ) do
+      ) do
     transport.setopts(socket, active: :once)
     handle_packet(packet, state_data, state, [])
   end
@@ -137,9 +137,7 @@ defmodule Tres.SecureChannel do
 
   # INIT state
   defp handle_INIT(:enter, _old_state, state_data) do
-    debug(
-      "Initiate HELLO handshake: " <> "#{state_data.ip_addr}:#{state_data.port}"
-    )
+    debug("Initiate HELLO handshake: " <> "#{state_data.ip_addr}:#{state_data.port}")
 
     initiate_hello_handshake(state_data)
   end
@@ -153,19 +151,14 @@ defmodule Tres.SecureChannel do
   end
 
   defp handle_INIT(:internal, message, _state_data) do
-    debug(
-      "Hello handshake in progress, " <> "dropping message: #{inspect(message)}"
-    )
+    debug("Hello handshake in progress, " <> "dropping message: #{inspect(message)}")
 
     :keep_state_and_data
   end
 
   # CONNECTING state
   defp handle_CONNECTING(:enter, :INIT, state_data) do
-    debug(
-      "Initiate FEATURES handshake:" <>
-        " #{state_data.ip_addr}:#{state_data.port}"
-    )
+    debug("Initiate FEATURES handshake:" <> " #{state_data.ip_addr}:#{state_data.port}")
 
     initiate_features_handshake(state_data)
   end
@@ -195,8 +188,7 @@ defmodule Tres.SecureChannel do
 
   defp handle_CONNECTING(:internal, {:openflow, message}, _state_data) do
     debug(
-      "Features handshake in progress," <>
-        " dropping message: #{inspect(message.__struct__)}"
+      "Features handshake in progress," <> " dropping message: #{inspect(message.__struct__)}"
     )
 
     :keep_state_and_data
@@ -209,6 +201,7 @@ defmodule Tres.SecureChannel do
   # CONNECTED state
   defp handle_CONNECTED(:enter, :CONNECTING, state_data) do
     _tref = schedule_xactdb_ageout()
+
     case init_handler(state_data) do
       %State{} = new_state_data ->
         start_periodic_idle_check()
@@ -340,10 +333,12 @@ defmodule Tres.SecureChannel do
         action = {:next_event, :internal, {:openflow, message}}
         new_state_data = %{state_data | buffer: "", last_received: :os.timestamp()}
         handle_packet(leftovers, new_state_data, state, [action | actions])
+
       {:error, :binary_too_small} ->
         handle_packet("", %{state_data | buffer: binary}, state, actions)
-      {:error, :malformed_packet} ->
-        :ok = debug("malformed packet received from #{state_data.datapath_id}")
+
+      {:error, {:malformed_packet, {_reason, st}}} ->
+        :ok = debug("malformed packet received from #{state_data.datapath_id} stack_trace: #{st}")
         handle_packet("", %{state_data | buffer: ""}, state, actions)
     end
   end
@@ -375,8 +370,9 @@ defmodule Tres.SecureChannel do
     unless is_nil(message), do: send(state_data.handler_pid, message)
     XACT_KV.delete(state_data.xact_kv_ref, xid)
   end
+
   defp process_xact_entry({:xact_entry, xid, message, _orig, from, _inserted_at}, state_data)
-  when is_tuple(from) do
+       when is_tuple(from) do
     reply = if is_nil(message), do: :noreply, else: message
     :ok = :gen_statem.reply(from, {:ok, reply})
     XACT_KV.delete(state_data.xact_kv_ref, xid)
@@ -558,8 +554,7 @@ defmodule Tres.SecureChannel do
   defp send_message(message, %State{socket: socket, transport: transport}) do
     if is_list(message) do
       for message <- message,
-          do:
-            debug("Sending: #{inspect(message.__struct__)}(xid: #{message.xid})")
+          do: debug("Sending: #{inspect(message.__struct__)}(xid: #{message.xid})")
     else
       debug("Sending: #{inspect(message.__struct__)}(xid: #{message.xid})")
     end

lib/tres/switch_registry.ex

@@ -25,6 +25,7 @@ defmodule Tres.SwitchRegistry do
   def send_message(message, dpid, _blocking = true) do
     blocking_send_message(message, dpid)
   end
+
   def send_message(message, dpid, _blocking) do
     send_message(message, dpid)
   end

lib/tres/utils.ex

@@ -14,11 +14,11 @@ defmodule Tres.Utils do
 
   def start_openflow_listener do
     :ranch.start_listener(
-      _ref            = Tres,
-      _trasport       = :ranch_tcp,
+      _ref = Tres,
+      _trasport = :ranch_tcp,
       _transport_opts = transport_options(),
-      _protocol       = @connection_manager,
-      _protocol_opts  = []
+      _protocol = @connection_manager,
+      _protocol_opts = []
     )
   end