Openflow parser

lib/openflow/actions/nx_note.ex

@@ -0,0 +1,26 @@
+defmodule Openflow.Action.NxNote do
+  defstruct(note: "")
+
+  @experimenter 0x00002320
+  @nxast 8
+
+  alias __MODULE__
+
+  def new(note) do
+    %NxNote{note: note}
+  end
+
+  def to_binary(%NxNote{note: note}) do
+    padding = Openflow.Utils.padding(byte_size(note) + 2, 8)
+    exp_body = <<@experimenter::32, @nxast::16, note::bytes, 0::size(padding)-unit(8)>>
+    exp_body_size =  byte_size(exp_body)
+    padding_length = Openflow.Utils.padding(4 + exp_body_size, 8)
+    length = 4 + exp_body_size + padding_length
+    <<0xffff::16, length::16, exp_body::bytes, 0::size(padding_length)-unit(8)>>
+  end
+
+  def read(<<@experimenter::32, @nxast::16, note_bin::bytes>>) do
+    note = Openflow.Utils.decode_string(note_bin)
+    %NxNote{note: note}
+  end
+end