Openflow parser

lib/openflow/port_mod.ex

@@ -0,0 +1,48 @@
+defmodule Openflow.PortMod do
+  defstruct(
+    version:     4,
+    xid:         0,
+    datapath_id: "",
+    aux_id:      0,
+    number:      0,
+    hw_addr:     "000000000000",
+    config:      [],
+    mask:        [],
+    advertise:   []
+  )
+
+  alias __MODULE__
+
+  def ofp_type, do: 16
+
+  def new(options \\ []) do
+    port_no = Keyword.get(options, :number, :all)
+    hw_addr = Keyword.get(options, :hw_adddr, "000000000000")
+    config = Keyword.get(options, :config, [])
+    mask = Keyword.get(options, :mask, [])
+    advertise = Keyword.get(options, :advertise, [])
+    %PortMod{number: port_no, hw_addr: hw_addr, config: config, mask: mask, advertise: advertise}
+  end
+
+  def read(<<port_no_int::32, _::size(4)-unit(8), hw_addr_bin::6-bytes,
+             _::size(2)-unit(8), config_int::32, mask_int::32,
+             advertised_int::32, _::size(4)-unit(8)>>) do
+    port_no = Openflow.Utils.get_enum(port_no_int, :openflow13_port_no)
+    hw_addr = Openflow.Utils.to_hex_string(hw_addr_bin)
+    config = Openflow.Enums.int_to_flags(config_int, :port_config)
+    mask = Openflow.Enums.int_to_flags(mask_int, :port_config)
+    adv = Openflow.Enums.int_to_flags(advertised_int, :port_features)
+    %PortMod{number: port_no, hw_addr: hw_addr, config: config, mask: mask, advertise: adv}
+  end
+
+  def to_binary(%PortMod{number: port_no, hw_addr: hw_addr, config: config, mask: mask, advertise: adv}) do
+    port_no_int = Openflow.Utils.get_enum(port_no, :openflow13_port_no)
+    hw_addr_bin = <<(String.to_integer(hw_addr, 16))::48>>
+    config_int = Openflow.Enums.flags_to_int(config, :port_config)
+    mask_int = Openflow.Enums.flags_to_int(mask, :port_config)
+    advertised_int = Openflow.Enums.flags_to_int(adv, :port_features)
+    <<port_no_int::32, 0::size(4)-unit(8), hw_addr_bin::6-bytes,
+      0::size(2)-unit(8), config_int::32, mask_int::32,
+      advertised_int::32, 0::size(4)-unit(8)>>
+  end
+end