Openflow parser

lib/openflow/features/reply.ex

@@ -0,0 +1,39 @@
+defmodule Openflow.Features.Reply do
+  defstruct(
+    version:        4,
+    xid:            0,
+    datapath_id:   "",
+    n_buffers:      0,
+    n_tables:       0,
+    aux_id:         0,
+    capabilities:   [],
+  )
+
+  alias __MODULE__
+
+  def ofp_type, do: 6
+
+  def read(<<datapath_id::64-bits, n_buf::32, n_tab::8,
+    aux_id::8, _pad::16, caps_int::32, _rsv::32>>) do
+    dpid = Openflow.Utils.to_hex_string(datapath_id)
+    flags = Openflow.Enums.int_to_flags(caps_int, :switch_capabilities)
+    %Reply{
+      datapath_id: dpid,
+      n_buffers: n_buf,
+      n_tables: n_tab,
+      aux_id: aux_id,
+      capabilities: flags
+    }
+  end
+
+  def to_binary(%Reply{
+        datapath_id: datapath_id,
+        n_buffers: n_buf,
+        n_tables: n_tab,
+        aux_id: aux_id,
+        capabilities: flags}) do
+    dpid_int = String.to_integer(datapath_id, 16)
+    flags_int = Openflow.Enums.flags_to_int(flags, :switch_capabilities)
+    <<dpid_int::64, n_buf::32, n_tab::8, aux_id::8, 0::16, flags_int::32, 0::32>>
+  end
+end

lib/openflow/features/request.ex

@@ -0,0 +1,24 @@
+defmodule Openflow.Features.Request do
+  defstruct(
+    version:        4,
+    xid:            0,
+    datapath_id:  nil, # virtual field
+    aux_id:         0  # virtual field
+  )
+
+  alias __MODULE__
+
+  def ofp_type, do: 5
+
+  def new do
+    %Request{}
+  end
+
+  def read(_) do
+    %Request{}
+  end
+
+  def to_binary(%Request{}) do
+    <<>>
+  end
+end