diff --git a/.formatter.exs b/.formatter.exs
index b874ba3..aafb2f5 100644
--- a/.formatter.exs
+++ b/.formatter.exs
@@ -1,5 +1,5 @@
 [
-  inputs: ["mix.exs", "{config,lib,test}/**/*.{ex,exs}"],
+  inputs: ["mix.exs", "{config,lib,test,priv}/**/*.{ex,exs}"],
 
   locals_without_parens: [
     # Formatter tests
diff --git a/lib/openflow/enums.ex b/lib/openflow/enums.ex
index fac3ba4..c5e1be0 100644
--- a/lib/openflow/enums.ex
+++ b/lib/openflow/enums.ex
@@ -3879,6 +3879,34 @@ defmodule Openflow.Enums do
     throw(:bad_enum)
   end
 
+  def to_int(:all, :group_type_flags) do
+    group_type_flags_to_int(:all)
+  catch
+    _class, _reason -> :all
+  end
+
+  def to_int(:select, :group_type_flags) do
+    group_type_flags_to_int(:select)
+  catch
+    _class, _reason -> :select
+  end
+
+  def to_int(:indirect, :group_type_flags) do
+    group_type_flags_to_int(:indirect)
+  catch
+    _class, _reason -> :indirect
+  end
+
+  def to_int(:fast_failover, :group_type_flags) do
+    group_type_flags_to_int(:fast_failover)
+  catch
+    _class, _reason -> :fast_failover
+  end
+
+  def to_int(_int, :group_type_flags) do
+    throw(:bad_enum)
+  end
+
   def to_int(:max, :group_id) do
     group_id_to_int(:max)
   catch
@@ -4225,6 +4253,136 @@ defmodule Openflow.Enums do
     throw(:bad_enum)
   end
 
+  def to_int(Openflow.Action.Output, :action_flags) do
+    action_flags_to_int(Openflow.Action.Output)
+  catch
+    _class, _reason -> Openflow.Action.Output
+  end
+
+  def to_int(Openflow.Action.CopyTtlOut, :action_flags) do
+    action_flags_to_int(Openflow.Action.CopyTtlOut)
+  catch
+    _class, _reason -> Openflow.Action.CopyTtlOut
+  end
+
+  def to_int(Openflow.Action.CopyTtlIn, :action_flags) do
+    action_flags_to_int(Openflow.Action.CopyTtlIn)
+  catch
+    _class, _reason -> Openflow.Action.CopyTtlIn
+  end
+
+  def to_int(Openflow.Action.SetMplsTtl, :action_flags) do
+    action_flags_to_int(Openflow.Action.SetMplsTtl)
+  catch
+    _class, _reason -> Openflow.Action.SetMplsTtl
+  end
+
+  def to_int(Openflow.Action.DecMplsTtl, :action_flags) do
+    action_flags_to_int(Openflow.Action.DecMplsTtl)
+  catch
+    _class, _reason -> Openflow.Action.DecMplsTtl
+  end
+
+  def to_int(Openflow.Action.PushVlan, :action_flags) do
+    action_flags_to_int(Openflow.Action.PushVlan)
+  catch
+    _class, _reason -> Openflow.Action.PushVlan
+  end
+
+  def to_int(Openflow.Action.PopVlan, :action_flags) do
+    action_flags_to_int(Openflow.Action.PopVlan)
+  catch
+    _class, _reason -> Openflow.Action.PopVlan
+  end
+
+  def to_int(Openflow.Action.PushMpls, :action_flags) do
+    action_flags_to_int(Openflow.Action.PushMpls)
+  catch
+    _class, _reason -> Openflow.Action.PushMpls
+  end
+
+  def to_int(Openflow.Action.PopMpls, :action_flags) do
+    action_flags_to_int(Openflow.Action.PopMpls)
+  catch
+    _class, _reason -> Openflow.Action.PopMpls
+  end
+
+  def to_int(Openflow.Action.SetQueue, :action_flags) do
+    action_flags_to_int(Openflow.Action.SetQueue)
+  catch
+    _class, _reason -> Openflow.Action.SetQueue
+  end
+
+  def to_int(Openflow.Action.Group, :action_flags) do
+    action_flags_to_int(Openflow.Action.Group)
+  catch
+    _class, _reason -> Openflow.Action.Group
+  end
+
+  def to_int(Openflow.Action.SetNwTtl, :action_flags) do
+    action_flags_to_int(Openflow.Action.SetNwTtl)
+  catch
+    _class, _reason -> Openflow.Action.SetNwTtl
+  end
+
+  def to_int(Openflow.Action.DecNwTtl, :action_flags) do
+    action_flags_to_int(Openflow.Action.DecNwTtl)
+  catch
+    _class, _reason -> Openflow.Action.DecNwTtl
+  end
+
+  def to_int(Openflow.Action.SetField, :action_flags) do
+    action_flags_to_int(Openflow.Action.SetField)
+  catch
+    _class, _reason -> Openflow.Action.SetField
+  end
+
+  def to_int(Openflow.Action.PushPbb, :action_flags) do
+    action_flags_to_int(Openflow.Action.PushPbb)
+  catch
+    _class, _reason -> Openflow.Action.PushPbb
+  end
+
+  def to_int(Openflow.Action.PopPbb, :action_flags) do
+    action_flags_to_int(Openflow.Action.PopPbb)
+  catch
+    _class, _reason -> Openflow.Action.PopPbb
+  end
+
+  def to_int(Openflow.Action.Encap, :action_flags) do
+    action_flags_to_int(Openflow.Action.Encap)
+  catch
+    _class, _reason -> Openflow.Action.Encap
+  end
+
+  def to_int(Openflow.Action.Decap, :action_flags) do
+    action_flags_to_int(Openflow.Action.Decap)
+  catch
+    _class, _reason -> Openflow.Action.Decap
+  end
+
+  def to_int(Openflow.Action.SetSequence, :action_flags) do
+    action_flags_to_int(Openflow.Action.SetSequence)
+  catch
+    _class, _reason -> Openflow.Action.SetSequence
+  end
+
+  def to_int(Openflow.Action.ValidateSequence, :action_flags) do
+    action_flags_to_int(Openflow.Action.ValidateSequence)
+  catch
+    _class, _reason -> Openflow.Action.ValidateSequence
+  end
+
+  def to_int(Openflow.Action.Experimenter, :action_flags) do
+    action_flags_to_int(Openflow.Action.Experimenter)
+  catch
+    _class, _reason -> Openflow.Action.Experimenter
+  end
+
+  def to_int(_int, :action_flags) do
+    throw(:bad_enum)
+  end
+
   def to_int(:nicira_ext_action, :action_vendor) do
     action_vendor_to_int(:nicira_ext_action)
   catch
@@ -9137,6 +9295,34 @@ defmodule Openflow.Enums do
     throw(:bad_enum)
   end
 
+  def to_atom(0x1, :group_type_flags) do
+    group_type_flags_to_atom(0x1)
+  catch
+    _class, _reason -> 1
+  end
+
+  def to_atom(0x2, :group_type_flags) do
+    group_type_flags_to_atom(0x2)
+  catch
+    _class, _reason -> 2
+  end
+
+  def to_atom(0x4, :group_type_flags) do
+    group_type_flags_to_atom(0x4)
+  catch
+    _class, _reason -> 4
+  end
+
+  def to_atom(0x8, :group_type_flags) do
+    group_type_flags_to_atom(0x8)
+  catch
+    _class, _reason -> 8
+  end
+
+  def to_atom(_, :group_type_flags) do
+    throw(:bad_enum)
+  end
+
   def to_atom(0xFFFFFF00, :group_id) do
     group_id_to_atom(0xFFFFFF00)
   catch
@@ -9483,6 +9669,136 @@ defmodule Openflow.Enums do
     throw(:bad_enum)
   end
 
+  def to_atom(0x1, :action_flags) do
+    action_flags_to_atom(0x1)
+  catch
+    _class, _reason -> 1
+  end
+
+  def to_atom(0x800, :action_flags) do
+    action_flags_to_atom(0x800)
+  catch
+    _class, _reason -> 2048
+  end
+
+  def to_atom(0x1000, :action_flags) do
+    action_flags_to_atom(0x1000)
+  catch
+    _class, _reason -> 4096
+  end
+
+  def to_atom(0x8000, :action_flags) do
+    action_flags_to_atom(0x8000)
+  catch
+    _class, _reason -> 32768
+  end
+
+  def to_atom(0x10000, :action_flags) do
+    action_flags_to_atom(0x10000)
+  catch
+    _class, _reason -> 65536
+  end
+
+  def to_atom(0x20000, :action_flags) do
+    action_flags_to_atom(0x20000)
+  catch
+    _class, _reason -> 131_072
+  end
+
+  def to_atom(0x40000, :action_flags) do
+    action_flags_to_atom(0x40000)
+  catch
+    _class, _reason -> 262_144
+  end
+
+  def to_atom(0x80000, :action_flags) do
+    action_flags_to_atom(0x80000)
+  catch
+    _class, _reason -> 524_288
+  end
+
+  def to_atom(0x100000, :action_flags) do
+    action_flags_to_atom(0x100000)
+  catch
+    _class, _reason -> 1_048_576
+  end
+
+  def to_atom(0x200000, :action_flags) do
+    action_flags_to_atom(0x200000)
+  catch
+    _class, _reason -> 2_097_152
+  end
+
+  def to_atom(0x400000, :action_flags) do
+    action_flags_to_atom(0x400000)
+  catch
+    _class, _reason -> 4_194_304
+  end
+
+  def to_atom(0x800000, :action_flags) do
+    action_flags_to_atom(0x800000)
+  catch
+    _class, _reason -> 8_388_608
+  end
+
+  def to_atom(0x1000000, :action_flags) do
+    action_flags_to_atom(0x1000000)
+  catch
+    _class, _reason -> 16_777_216
+  end
+
+  def to_atom(0x2000000, :action_flags) do
+    action_flags_to_atom(0x2000000)
+  catch
+    _class, _reason -> 33_554_432
+  end
+
+  def to_atom(0x4000000, :action_flags) do
+    action_flags_to_atom(0x4000000)
+  catch
+    _class, _reason -> 67_108_864
+  end
+
+  def to_atom(0x8000000, :action_flags) do
+    action_flags_to_atom(0x8000000)
+  catch
+    _class, _reason -> 134_217_728
+  end
+
+  def to_atom(0x10000000, :action_flags) do
+    action_flags_to_atom(0x10000000)
+  catch
+    _class, _reason -> 268_435_456
+  end
+
+  def to_atom(0x20000000, :action_flags) do
+    action_flags_to_atom(0x20000000)
+  catch
+    _class, _reason -> 536_870_912
+  end
+
+  def to_atom(0x40000000, :action_flags) do
+    action_flags_to_atom(0x40000000)
+  catch
+    _class, _reason -> 1_073_741_824
+  end
+
+  def to_atom(0x80000000, :action_flags) do
+    action_flags_to_atom(0x80000000)
+  catch
+    _class, _reason -> 2_147_483_648
+  end
+
+  def to_atom(0xFFFF, :action_flags) do
+    action_flags_to_atom(0xFFFF)
+  catch
+    _class, _reason -> 65535
+  end
+
+  def to_atom(_, :action_flags) do
+    throw(:bad_enum)
+  end
+
   def to_atom(0x2320, :action_vendor) do
     action_vendor_to_atom(0x2320)
   catch
@@ -11849,6 +12165,16 @@ defmodule Openflow.Enums do
   def group_type_to_atom(0x2), do: :indirect
   def group_type_to_atom(0x3), do: :fast_failover
   def group_type_to_atom(_), do: throw(:bad_enum)
+  def group_type_flags_to_int(:all), do: 0x1
+  def group_type_flags_to_int(:select), do: 0x2
+  def group_type_flags_to_int(:indirect), do: 0x4
+  def group_type_flags_to_int(:fast_failover), do: 0x8
+  def group_type_flags_to_int(_), do: throw(:bad_enum)
+  def group_type_flags_to_atom(0x1), do: :all
+  def group_type_flags_to_atom(0x2), do: :select
+  def group_type_flags_to_atom(0x4), do: :indirect
+  def group_type_flags_to_atom(0x8), do: :fast_failover
+  def group_type_flags_to_atom(_), do: throw(:bad_enum)
   def group_id_to_int(:max), do: 0xFFFFFF00
   def group_id_to_int(:all), do: 0xFFFFFFFC
   def group_id_to_int(:any), do: 0xFFFFFFFF
@@ -11971,6 +12297,50 @@ defmodule Openflow.Enums do
   def action_type_to_atom(0x1F), do: Openflow.Action.ValidateSequence
   def action_type_to_atom(0xFFFF), do: Openflow.Action.Experimenter
   def action_type_to_atom(_), do: throw(:bad_enum)
+  def action_flags_to_int(Openflow.Action.Output), do: 0x1
+  def action_flags_to_int(Openflow.Action.CopyTtlOut), do: 0x800
+  def action_flags_to_int(Openflow.Action.CopyTtlIn), do: 0x1000
+  def action_flags_to_int(Openflow.Action.SetMplsTtl), do: 0x8000
+  def action_flags_to_int(Openflow.Action.DecMplsTtl), do: 0x10000
+  def action_flags_to_int(Openflow.Action.PushVlan), do: 0x20000
+  def action_flags_to_int(Openflow.Action.PopVlan), do: 0x40000
+  def action_flags_to_int(Openflow.Action.PushMpls), do: 0x80000
+  def action_flags_to_int(Openflow.Action.PopMpls), do: 0x100000
+  def action_flags_to_int(Openflow.Action.SetQueue), do: 0x200000
+  def action_flags_to_int(Openflow.Action.Group), do: 0x400000
+  def action_flags_to_int(Openflow.Action.SetNwTtl), do: 0x800000
+  def action_flags_to_int(Openflow.Action.DecNwTtl), do: 0x1000000
+  def action_flags_to_int(Openflow.Action.SetField), do: 0x2000000
+  def action_flags_to_int(Openflow.Action.PushPbb), do: 0x4000000
+  def action_flags_to_int(Openflow.Action.PopPbb), do: 0x8000000
+  def action_flags_to_int(Openflow.Action.Encap), do: 0x10000000
+  def action_flags_to_int(Openflow.Action.Decap), do: 0x20000000
+  def action_flags_to_int(Openflow.Action.SetSequence), do: 0x40000000
+  def action_flags_to_int(Openflow.Action.ValidateSequence), do: 0x80000000
+  def action_flags_to_int(Openflow.Action.Experimenter), do: 0xFFFF
+  def action_flags_to_int(_), do: throw(:bad_enum)
+  def action_flags_to_atom(0x1), do: Openflow.Action.Output
+  def action_flags_to_atom(0x800), do: Openflow.Action.CopyTtlOut
+  def action_flags_to_atom(0x1000), do: Openflow.Action.CopyTtlIn
+  def action_flags_to_atom(0x8000), do: Openflow.Action.SetMplsTtl
+  def action_flags_to_atom(0x10000), do: Openflow.Action.DecMplsTtl
+  def action_flags_to_atom(0x20000), do: Openflow.Action.PushVlan
+  def action_flags_to_atom(0x40000), do: Openflow.Action.PopVlan
+  def action_flags_to_atom(0x80000), do: Openflow.Action.PushMpls
+  def action_flags_to_atom(0x100000), do: Openflow.Action.PopMpls
+  def action_flags_to_atom(0x200000), do: Openflow.Action.SetQueue
+  def action_flags_to_atom(0x400000), do: Openflow.Action.Group
+  def action_flags_to_atom(0x800000), do: Openflow.Action.SetNwTtl
+  def action_flags_to_atom(0x1000000), do: Openflow.Action.DecNwTtl
+  def action_flags_to_atom(0x2000000), do: Openflow.Action.SetField
+  def action_flags_to_atom(0x4000000), do: Openflow.Action.PushPbb
+  def action_flags_to_atom(0x8000000), do: Openflow.Action.PopPbb
+  def action_flags_to_atom(0x10000000), do: Openflow.Action.Encap
+  def action_flags_to_atom(0x20000000), do: Openflow.Action.Decap
+  def action_flags_to_atom(0x40000000), do: Openflow.Action.SetSequence
+  def action_flags_to_atom(0x80000000), do: Openflow.Action.ValidateSequence
+  def action_flags_to_atom(0xFFFF), do: Openflow.Action.Experimenter
+  def action_flags_to_atom(_), do: throw(:bad_enum)
   def action_vendor_to_int(:nicira_ext_action), do: 0x2320
   def action_vendor_to_int(:onf_ext_action), do: 0x4F4E4600
   def action_vendor_to_int(_), do: throw(:bad_enum)
@@ -12570,6 +12940,10 @@ defmodule Openflow.Enums do
     Openflow.Utils.int_to_flags([], int, enum_of(:group_type))
   end
 
+  def int_to_flags(int, :group_type_flags) do
+    Openflow.Utils.int_to_flags([], int, enum_of(:group_type_flags))
+  end
+
   def int_to_flags(int, :group_id) do
     Openflow.Utils.int_to_flags([], int, enum_of(:group_id))
   end
@@ -12610,6 +12984,10 @@ defmodule Openflow.Enums do
     Openflow.Utils.int_to_flags([], int, enum_of(:action_type))
   end
 
+  def int_to_flags(int, :action_flags) do
+    Openflow.Utils.int_to_flags([], int, enum_of(:action_flags))
+  end
+
   def int_to_flags(int, :action_vendor) do
     Openflow.Utils.int_to_flags([], int, enum_of(:action_vendor))
   end
@@ -12950,6 +13328,10 @@ defmodule Openflow.Enums do
     Openflow.Utils.flags_to_int(0, flags, enum_of(:group_type))
   end
 
+  def flags_to_int(flags, :group_type_flags) do
+    Openflow.Utils.flags_to_int(0, flags, enum_of(:group_type_flags))
+  end
+
   def flags_to_int(flags, :group_id) do
     Openflow.Utils.flags_to_int(0, flags, enum_of(:group_id))
   end
@@ -12990,6 +13372,10 @@ defmodule Openflow.Enums do
     Openflow.Utils.flags_to_int(0, flags, enum_of(:action_type))
   end
 
+  def flags_to_int(flags, :action_flags) do
+    Openflow.Utils.flags_to_int(0, flags, enum_of(:action_flags))
+  end
+
   def flags_to_int(flags, :action_vendor) do
     Openflow.Utils.flags_to_int(0, flags, enum_of(:action_vendor))
   end
@@ -13772,6 +14158,7 @@ defmodule Openflow.Enums do
   defp enum_of(:port_reason_mask), do: [add: 1, delete: 2, modify: 4]
   defp enum_of(:group_mod_command), do: [add: 0, modify: 1, delete: 2]
   defp enum_of(:group_type), do: [all: 0, select: 1, indirect: 2, fast_failover: 3]
+  defp enum_of(:group_type_flags), do: [all: 1, select: 2, indirect: 4, fast_failover: 8]
   defp enum_of(:group_id), do: [max: 4_294_967_040, all: 4_294_967_292, any: 4_294_967_295]
 
   defp enum_of(:group_capabilities),
@@ -13833,6 +14220,31 @@ defmodule Openflow.Enums do
       {Openflow.Action.Experimenter, 65535}
     ]
 
+  defp enum_of(:action_flags),
+    do: [
+      {Openflow.Action.Output, 1},
+      {Openflow.Action.CopyTtlOut, 2048},
+      {Openflow.Action.CopyTtlIn, 4096},
+      {Openflow.Action.SetMplsTtl, 32768},
+      {Openflow.Action.DecMplsTtl, 65536},
+      {Openflow.Action.PushVlan, 131_072},
+      {Openflow.Action.PopVlan, 262_144},
+      {Openflow.Action.PushMpls, 524_288},
+      {Openflow.Action.PopMpls, 1_048_576},
+      {Openflow.Action.SetQueue, 2_097_152},
+      {Openflow.Action.Group, 4_194_304},
+      {Openflow.Action.SetNwTtl, 8_388_608},
+      {Openflow.Action.DecNwTtl, 16_777_216},
+      {Openflow.Action.SetField, 33_554_432},
+      {Openflow.Action.PushPbb, 67_108_864},
+      {Openflow.Action.PopPbb, 134_217_728},
+      {Openflow.Action.Encap, 268_435_456},
+      {Openflow.Action.Decap, 536_870_912},
+      {Openflow.Action.SetSequence, 1_073_741_824},
+      {Openflow.Action.ValidateSequence, 2_147_483_648},
+      {Openflow.Action.Experimenter, 65535}
+    ]
+
   defp enum_of(:action_vendor), do: [nicira_ext_action: 8992, onf_ext_action: 1_330_529_792]
   defp enum_of(:onf_ext_action), do: [{Openflow.Action.OnfCopyField, 3200}]
 
diff --git a/lib/openflow/multipart/group_desc/reply.ex b/lib/openflow/multipart/group_desc/reply.ex
index 8e8d424..a56b837 100644
--- a/lib/openflow/multipart/group_desc/reply.ex
+++ b/lib/openflow/multipart/group_desc/reply.ex
@@ -4,6 +4,7 @@ defmodule Openflow.Multipart.GroupDesc.Reply do
     xid: 0,
     # virtual field
     datapath_id: nil,
+    aux_id: nil,
     flags: [],
     groups: []
   )
diff --git a/lib/openflow/multipart/group_desc/request.ex b/lib/openflow/multipart/group_desc/request.ex
index c8c3dae..59053d2 100644
--- a/lib/openflow/multipart/group_desc/request.ex
+++ b/lib/openflow/multipart/group_desc/request.ex
@@ -4,11 +4,20 @@ defmodule Openflow.Multipart.GroupDesc.Request do
     xid: 0,
     # virtual field
     datapath_id: nil,
+    aux_id: nil,
     flags: []
   )
 
   alias __MODULE__
 
+  @type t :: %Request{
+          version: 4,
+          datapath_id: String.t(),
+          aux_id: 0..0xFF | nil,
+          xid: 0..0xFFFFFFFF,
+          flags: [:more]
+        }
+
   def ofp_type, do: 18
 
   def new(xid \\ 0) do
diff --git a/lib/openflow/multipart/group_features/reply.ex b/lib/openflow/multipart/group_features/reply.ex
index a43667b..eb664ca 100644
--- a/lib/openflow/multipart/group_features/reply.ex
+++ b/lib/openflow/multipart/group_features/reply.ex
@@ -19,29 +19,29 @@ defmodule Openflow.Multipart.GroupFeatures.Reply do
   )
 
   alias __MODULE__
+  alias Openflow.Enums
 
   def ofp_type, do: 18
 
   def read(
-        <<types_int::32, capabilities_int::32, max_groups_for_all_int::32,
-          max_groups_for_select_int::32, max_groups_for_indirect_int::32,
-          max_groups_for_fast_failover_int::32, actions_for_all_int::32,
+        <<types_int::32, capabilities_int::32, max_groups_for_all::32, max_groups_for_select::32,
+          max_groups_for_indirect::32, max_groups_for_fast_failover::32, actions_for_all_int::32,
           actions_for_select_int::32, actions_for_indirect_int::32,
           actions_for_fast_failover_int::32>>
       ) do
     capabilities = Openflow.Enums.int_to_flags(capabilities_int, :group_capabilities)
 
     %Reply{
-      types: types_int,
+      types: Enums.int_to_flags(types_int, :group_type_flags),
       capabilities: capabilities,
-      max_groups_for_all: max_groups_for_all_int,
-      max_groups_for_select: max_groups_for_select_int,
-      max_groups_for_indirect: max_groups_for_indirect_int,
-      max_groups_for_fast_failover: max_groups_for_fast_failover_int,
-      actions_for_all: actions_for_all_int,
-      actions_for_select: actions_for_select_int,
-      actions_for_indirect: actions_for_indirect_int,
-      actions_for_fast_failover: actions_for_fast_failover_int
+      max_groups_for_all: max_groups_for_all,
+      max_groups_for_select: max_groups_for_select,
+      max_groups_for_indirect: max_groups_for_indirect,
+      max_groups_for_fast_failover: max_groups_for_fast_failover,
+      actions_for_all: Enums.int_to_flags(actions_for_all_int, :action_flags),
+      actions_for_select: Enums.int_to_flags(actions_for_select_int, :action_flags),
+      actions_for_indirect: Enums.int_to_flags(actions_for_indirect_int, :action_flags),
+      actions_for_fast_failover: Enums.int_to_flags(actions_for_fast_failover_int, :action_flags)
     }
   end
 end
diff --git a/lib/openflow/multipart/group_features/request.ex b/lib/openflow/multipart/group_features/request.ex
index e473878..f41e0e5 100644
--- a/lib/openflow/multipart/group_features/request.ex
+++ b/lib/openflow/multipart/group_features/request.ex
@@ -4,22 +4,28 @@ defmodule Openflow.Multipart.GroupFeatures.Request do
     xid: 0,
     # virtual field
     datapath_id: nil,
+    aux_id: nil,
     flags: []
   )
 
   alias __MODULE__
 
+  @type t :: %Request{
+          version: 4,
+          datapath_id: String.t(),
+          aux_id: 0..0xFF | nil,
+          xid: 0..0xFFFFFFFF
+        }
+
+  @spec ofp_type() :: 18
   def ofp_type, do: 18
 
-  def new(xid \\ 0) do
-    %Request{xid: xid}
-  end
+  @spec new(xid :: 0..0xFFFFFFFF) :: t()
+  def new(xid \\ 0), do: %Request{xid: xid}
 
-  def read("") do
-    %Request{}
-  end
+  @spec read(<<>>) :: t()
+  def read(""), do: %Request{}
 
-  def to_binary(%Request{} = msg) do
-    Openflow.Multipart.Request.header(msg)
-  end
+  @spec to_binary(t()) :: binary()
+  def to_binary(%Request{} = msg), do: Openflow.Multipart.Request.header(msg)
 end
diff --git a/priv/openflow_enum_gen.exs b/priv/openflow_enum_gen.exs
index c40e392..98e8d85 100644
--- a/priv/openflow_enum_gen.exs
+++ b/priv/openflow_enum_gen.exs
@@ -399,73 +399,73 @@ enums = [
     tun_metadata16: 56,
     tun_metadata17: 57,
     tun_metadata18: 58,
-tun_metadata19: 59,
-tun_metadata20: 60,
-tun_metadata21: 61,
-tun_metadata22: 62,
-tun_metadata23: 63,
-tun_metadata24: 64,
-tun_metadata25: 65,
-tun_metadata26: 66,
-tun_metadata27: 67,
-tun_metadata28: 68,
-tun_metadata29: 69,
-tun_metadata30: 70,
-tun_metadata31: 71,
-tun_metadata32: 72,
-tun_metadata33: 73,
-tun_metadata34: 74,
-tun_metadata35: 75,
-tun_metadata36: 76,
-tun_metadata37: 77,
-tun_metadata38: 78,
-tun_metadata39: 79,
-tun_metadata40: 80,
-tun_metadata41: 81,
-tun_metadata42: 82,
-tun_metadata43: 83,
-tun_metadata44: 84,
-tun_metadata45: 85,
-tun_metadata46: 86,
-tun_metadata47: 87,
-tun_metadata48: 88,
-tun_metadata49: 89,
-tun_metadata50: 90,
-tun_metadata51: 91,
-tun_metadata52: 92,
-tun_metadata53: 93,
-tun_metadata54: 94,
-tun_metadata55: 95,
-tun_metadata56: 96,
-tun_metadata57: 97,
-tun_metadata58: 98,
-tun_metadata59: 99,
-tun_metadata60: 100,
-tun_metadata61: 101,
-tun_metadata62: 102,
-tun_metadata63: 103,
-tun_flags: 104,
-ct_state: 105,
-ct_zone: 106,
-ct_mark: 107,
-ct_label: 108,
-tun_ipv6_src: 109,
-tun_ipv6_dst: 110,
-xxreg0: 111,
-xxreg1: 112,
-xxreg2: 113,
-xxreg3: 114,
-xxreg4: 115,
-xxreg5: 116,
-xxreg6: 117,
-xxreg7: 118,
-ct_nw_proto: 119,
-ct_nw_src: 120,
-ct_nw_dst: 121,
-ct_ipv6_src: 122,
-ct_ipv6_dst: 123,
-ct_tp_src: 124,
-ct_tp_dst: 125
+    tun_metadata19: 59,
+    tun_metadata20: 60,
+    tun_metadata21: 61,
+    tun_metadata22: 62,
+    tun_metadata23: 63,
+    tun_metadata24: 64,
+    tun_metadata25: 65,
+    tun_metadata26: 66,
+    tun_metadata27: 67,
+    tun_metadata28: 68,
+    tun_metadata29: 69,
+    tun_metadata30: 70,
+    tun_metadata31: 71,
+    tun_metadata32: 72,
+    tun_metadata33: 73,
+    tun_metadata34: 74,
+    tun_metadata35: 75,
+    tun_metadata36: 76,
+    tun_metadata37: 77,
+    tun_metadata38: 78,
+    tun_metadata39: 79,
+    tun_metadata40: 80,
+    tun_metadata41: 81,
+    tun_metadata42: 82,
+    tun_metadata43: 83,
+    tun_metadata44: 84,
+    tun_metadata45: 85,
+    tun_metadata46: 86,
+    tun_metadata47: 87,
+    tun_metadata48: 88,
+    tun_metadata49: 89,
+    tun_metadata50: 90,
+    tun_metadata51: 91,
+    tun_metadata52: 92,
+    tun_metadata53: 93,
+    tun_metadata54: 94,
+    tun_metadata55: 95,
+    tun_metadata56: 96,
+    tun_metadata57: 97,
+    tun_metadata58: 98,
+    tun_metadata59: 99,
+    tun_metadata60: 100,
+    tun_metadata61: 101,
+    tun_metadata62: 102,
+    tun_metadata63: 103,
+    tun_flags: 104,
+    ct_state: 105,
+    ct_zone: 106,
+    ct_mark: 107,
+    ct_label: 108,
+    tun_ipv6_src: 109,
+    tun_ipv6_dst: 110,
+    xxreg0: 111,
+    xxreg1: 112,
+    xxreg2: 113,
+    xxreg3: 114,
+    xxreg4: 115,
+    xxreg5: 116,
+    xxreg6: 117,
+    xxreg7: 118,
+    ct_nw_proto: 119,
+    ct_nw_src: 120,
+    ct_nw_dst: 121,
+    ct_ipv6_src: 122,
+    ct_ipv6_dst: 123,
+    ct_tp_src: 124,
+    ct_tp_dst: 125
   ],
   openflow_basic: [
     in_port: 0,
@@ -528,15 +528,15 @@ ct_tp_dst: 125
     mpls_pw_metadata: 56,
     mpls_cw_flags: 57,
     mpls_cw_fragment: 58,
-mpls_cw_len: 59,
-mpls_cw_seq_num: 60,
-gtpu_flags: 61,
-gtpu_ver: 62,
-gtpu_msg_type: 63,
-gtpu_teid: 64,
-gtpu_extn_hdr: 65,
-gtpu_extn_udp_port: 66,
-gtpu_extn_sci: 67
+    mpls_cw_len: 59,
+    mpls_cw_seq_num: 60,
+    gtpu_flags: 61,
+    gtpu_ver: 62,
+    gtpu_msg_type: 63,
+    gtpu_teid: 64,
+    gtpu_extn_hdr: 65,
+    gtpu_extn_udp_port: 66,
+    gtpu_extn_sci: 67
   ],
   vlan_id: [
     present: 0x1000,
@@ -745,6 +745,12 @@ gtpu_extn_sci: 67
     indirect: 2,
     fast_failover: 3
   ],
+  group_type_flags: [
+    all: 1 <<< 0,
+    select: 1 <<< 1,
+    indirect: 1 <<< 2,
+    fast_failover: 1 <<< 3
+  ],
   group_id: [
     max: 0xFFFFFF00,
     all: 0xFFFFFFFC,
@@ -756,281 +762,304 @@ gtpu_extn_sci: 67
     chaining: 1 <<< 2,
     chaining_checks: 1 <<< 3
   ],
-table_id: [
-  max: 0xFE,
-  all: 0xFF
-],
-queue_id: [
-  all: 0xFFFFFFFF
-],
-meter_mod_command: [
-  add: 0,
-  modify: 1,
-  delete: 2
-],
-meter_id: [
-  max: 0xFFFF0000,
-  slowpath: 0xFFFFFFFD,
-  controller: 0xFFFFFFFE,
-  all: 0xFFFFFFFF
-],
-meter_flags: [
-  kbps: 1 <<< 0,
-  pktps: 1 <<< 1,
-  burst: 1 <<< 2,
-  stats: 1 <<< 3
-],
-meter_band_type: [
-  {Openflow.MeterBand.Drop, 1},
-  {Openflow.MeterBand.Remark, 2},
-  {Openflow.MeterBand.Experimenter, 0xFFFF}
-],
-table_config: [
-  table_miss_controller: 0 <<< 0,
-  table_miss_continue: 1 <<< 0,
-  table_miss_drop: 2 <<< 0,
-  table_miss_mask: 3 <<< 0,
-  eviction: 1 <<< 2,
-  vacancy_events: 1 <<< 3
-],
-action_type: [
-  {Openflow.Action.Output, 0},
-  {Openflow.Action.CopyTtlOut, 11},
-  {Openflow.Action.CopyTtlIn, 12},
-  {Openflow.Action.SetMplsTtl, 15},
-  {Openflow.Action.DecMplsTtl, 16},
-  {Openflow.Action.PushVlan, 17},
-  {Openflow.Action.PopVlan, 18},
-  {Openflow.Action.PushMpls, 19},
-  {Openflow.Action.PopMpls, 20},
-  {Openflow.Action.SetQueue, 21},
-  {Openflow.Action.Group, 22},
-  {Openflow.Action.SetNwTtl, 23},
-  {Openflow.Action.DecNwTtl, 24},
-  {Openflow.Action.SetField, 25},
-  {Openflow.Action.PushPbb, 26},
-  {Openflow.Action.PopPbb, 27},
-  {Openflow.Action.Encap, 28},
-  {Openflow.Action.Decap, 29},
-  {Openflow.Action.SetSequence, 30},
-  {Openflow.Action.ValidateSequence, 31},
-  {Openflow.Action.Experimenter, 0xFFFF}
-],
-action_vendor: [
-  nicira_ext_action: 0x00002320,
-  onf_ext_action: 0x4F4E4600
-],
-onf_ext_action: [
-  {Openflow.Action.OnfCopyField, 3200}
-],
-nicira_ext_action: [
-  {Openflow.Action.NxResubmit, 1},
-  {Openflow.Action.NxSetTunnel, 2},
-  # {Openflow.Action.NxSetQueue, 4}, Deprecated
-  # {Openflow.Action.NxPopQueue, 5}, Deprecated
-  {Openflow.Action.NxRegMove, 6},
-  {Openflow.Action.NxRegLoad, 7},
-  {Openflow.Action.NxNote, 8},
-  {Openflow.Action.NxSetTunnel64, 9},
-  {Openflow.Action.NxMultipath, 10},
-  {Openflow.Action.NxBundle, 12},
-  {Openflow.Action.NxBundleLoad, 13},
-  {Openflow.Action.NxResubmitTable, 14},
-  {Openflow.Action.NxOutputReg, 15},
-  {Openflow.Action.NxLearn, 16},
-  {Openflow.Action.NxExit, 17},
-  {Openflow.Action.NxDecTtl, 18},
-  {Openflow.Action.NxFinTimeout, 19},
-  {Openflow.Action.NxController, 20},
-  {Openflow.Action.NxDecTtlCntIds, 21},
-  {Openflow.Action.NxWriteMetadata, 22},
-  # {Openflow.Action.NxPushMpls, 23}, # Deprecated
-  # {Openflow.Action.NxPopMpls, 24}, # Deprecated
-  # {Openflow.Action.NxSetMplsTtl, 25}, Deprecated
-  # {Openflow.Action.NxDecMplsTtl, 26}, Deprecated
-  {Openflow.Action.NxStackPush, 27},
-  {Openflow.Action.NxStackPop, 28},
-  {Openflow.Action.NxSample, 29},
-  # {Openflow.Action.NxSetMplsLabel, 30}, Deprecated
-  # {Openflow.Action.NxSetMplsTc, 31}, Deprecated
-  {Openflow.Action.NxOutputReg2, 32},
-  {Openflow.Action.NxRegLoad2, 33},
-  {Openflow.Action.NxConjunction, 34},
-  {Openflow.Action.NxConntrack, 35},
-  {Openflow.Action.NxNat, 36},
-  {Openflow.Action.NxController2, 37},
-  {Openflow.Action.NxSample2, 38},
-  {Openflow.Action.NxOutputTrunc, 39},
-  {Openflow.Action.NxGroup, 40},
-  {Openflow.Action.NxSample3, 41},
-  {Openflow.Action.NxClone, 42},
-  {Openflow.Action.NxCtClear, 43},
-  {Openflow.Action.NxResubmitTableCt, 44},
-  {Openflow.Action.NxLearn2, 45},
-  {Openflow.Action.NxEncap, 46},
-  {Openflow.Action.NxDecap, 47},
-  {Openflow.Action.NxDebugRecirc, 0xFF}
-],
-nx_mp_algorithm: [
-  modulo_n: 0,
-  hash_threshold: 1,
-  highest_random_weight: 2,
-  iterative_hash: 3
-],
-nx_hash_fields: [
-  eth_src: 0,
-  symmetric_l4: 1,
-  symmetric_l3l4: 2,
-  symmetric_l3l4_udp: 3,
-  nw_src: 4,
-  nw_dst: 5
-],
-nx_bd_algorithm: [
-  active_backup: 0,
-  highest_random_weight: 1
-],
-nx_learn_flag: [
-  send_flow_rem: 1 <<< 0,
-  delete_learned: 1 <<< 1,
-  write_result: 1 <<< 2
-],
-nx_conntrack_flags: [
-  commit: 1 <<< 0,
-  force: 1 <<< 1
-],
-nx_nat_flags: [
-  src: 1 <<< 0,
-  dst: 1 <<< 1,
-  persistent: 1 <<< 2,
-  protocol_hash: 1 <<< 3,
-  protocol_random: 1 <<< 4
-],
-nx_nat_range: [
-  ipv4_min: 1 <<< 0,
-  ipv4_max: 1 <<< 1,
-  ipv6_min: 1 <<< 2,
-  ipv6_max: 1 <<< 3,
-  proto_min: 1 <<< 4,
-  proto_max: 1 <<< 5
-],
-nx_action_controller2_prop_type: [
-  max_len: 0,
-  controller_id: 1,
-  reason: 2,
-  userdata: 3,
-  pause: 4
-],
-nx_action_sample_direction: [
-  default: 0,
-  ingress: 1,
-  egress: 2
-],
-nx_flow_spec_type: [
-  {Openflow.Action.NxFlowSpecMatch, 0},
-  {Openflow.Action.NxFlowSpecLoad, 1},
-  {Openflow.Action.NxFlowSpecOutput, 2}
-],
-instruction_type: [
-  {Openflow.Instruction.GotoTable, 1},
-  {Openflow.Instruction.WriteMetadata, 2},
-  {Openflow.Instruction.WriteActions, 3},
-  {Openflow.Instruction.ApplyActions, 4},
-  {Openflow.Instruction.ClearActions, 5},
-  {Openflow.Instruction.Meter, 6},
-  {Openflow.Instruction.Experimenter, 0xFFFF}
-],
-controller_role: [
-  nochange: 0,
-  equal: 1,
-  master: 2,
-  slave: 3
-],
-nx_role: [
-  other: 0,
-  master: 1,
-  slave: 2
-],
-packet_in_format: [
-  standard: 0,
-  nxt_packet_in: 1,
-  nxt_packet_in2: 2
-],
-flow_format: [
-  openflow10: 0,
-  nxm: 1
-],
-packet_in2_prop_type: [
-  packet: 0,
-  full_len: 1,
-  buffer_id: 2,
-  table_id: 3,
-  cookie: 4,
-  reason: 5,
-  metadata: 6,
-  userdata: 7,
-  continuation: 8
-],
-continuation_prop_type: [
-  bridge: 0x8000,
-  stack: 0x8001,
-  mirrors: 0x8002,
-  conntracked: 0x8003,
-  table_id: 0x8004,
-  cookie: 0x8005,
-  actions: 0x8006,
-  action_set: 0x8007
-],
-flow_monitor_flag: [
-  initial: 1 <<< 0,
-  add: 1 <<< 1,
-  delete: 1 <<< 2,
-  modify: 1 <<< 3,
-  actions: 1 <<< 4,
-  own: 1 <<< 5
-],
-flow_update_event: [
-  added: 0,
-  deleted: 1,
-  modified: 2,
-  abbrev: 3
-],
-tlv_table_mod_command: [
-  add: 0,
-  delete: 1,
-  clear: 2
-],
-table_feature_prop_type: [
-  instructions: 0,
-  instructions_miss: 1,
-  next_tables: 2,
-  next_tables_miss: 3,
-  write_actions: 4,
-  write_actions_miss: 5,
-  apply_actions: 6,
-  apply_actions_miss: 7,
-  match: 8,
-  wildcards: 10,
-  write_setfield: 12,
-  write_setfield_miss: 13,
-  apply_setfield: 14,
-  apply_setfield_miss: 15,
-  experimenter: 0xFFFE,
-  experimenter_miss: 0xFFFF
-],
-bundle_ctrl_type: [
-  open_request: 0,
-  open_reply: 1,
-  close_request: 2,
-  close_reply: 3,
-  commit_request: 4,
-  commit_reply: 5,
-  discard_request: 6,
-  discard_reply: 7
-],
-bundle_flags: [
-  atomic: 1 <<< 0,
-  ordered: 1 <<< 1
-]
+  table_id: [
+    max: 0xFE,
+    all: 0xFF
+  ],
+  queue_id: [
+    all: 0xFFFFFFFF
+  ],
+  meter_mod_command: [
+    add: 0,
+    modify: 1,
+    delete: 2
+  ],
+  meter_id: [
+    max: 0xFFFF0000,
+    slowpath: 0xFFFFFFFD,
+    controller: 0xFFFFFFFE,
+    all: 0xFFFFFFFF
+  ],
+  meter_flags: [
+    kbps: 1 <<< 0,
+    pktps: 1 <<< 1,
+    burst: 1 <<< 2,
+    stats: 1 <<< 3
+  ],
+  meter_band_type: [
+    {Openflow.MeterBand.Drop, 1},
+    {Openflow.MeterBand.Remark, 2},
+    {Openflow.MeterBand.Experimenter, 0xFFFF}
+  ],
+  table_config: [
+    table_miss_controller: 0 <<< 0,
+    table_miss_continue: 1 <<< 0,
+    table_miss_drop: 2 <<< 0,
+    table_miss_mask: 3 <<< 0,
+    eviction: 1 <<< 2,
+    vacancy_events: 1 <<< 3
+  ],
+  action_type: [
+    {Openflow.Action.Output, 0},
+    {Openflow.Action.CopyTtlOut, 11},
+    {Openflow.Action.CopyTtlIn, 12},
+    {Openflow.Action.SetMplsTtl, 15},
+    {Openflow.Action.DecMplsTtl, 16},
+    {Openflow.Action.PushVlan, 17},
+    {Openflow.Action.PopVlan, 18},
+    {Openflow.Action.PushMpls, 19},
+    {Openflow.Action.PopMpls, 20},
+    {Openflow.Action.SetQueue, 21},
+    {Openflow.Action.Group, 22},
+    {Openflow.Action.SetNwTtl, 23},
+    {Openflow.Action.DecNwTtl, 24},
+    {Openflow.Action.SetField, 25},
+    {Openflow.Action.PushPbb, 26},
+    {Openflow.Action.PopPbb, 27},
+    {Openflow.Action.Encap, 28},
+    {Openflow.Action.Decap, 29},
+    {Openflow.Action.SetSequence, 30},
+    {Openflow.Action.ValidateSequence, 31},
+    {Openflow.Action.Experimenter, 0xFFFF}
+  ],
+  action_flags: [
+    {Openflow.Action.Output, 1 <<< 0},
+    {Openflow.Action.CopyTtlOut, 1 <<< 11},
+    {Openflow.Action.CopyTtlIn, 1 <<< 12},
+    {Openflow.Action.SetMplsTtl, 1 <<< 15},
+    {Openflow.Action.DecMplsTtl, 1 <<< 16},
+    {Openflow.Action.PushVlan, 1 <<< 17},
+    {Openflow.Action.PopVlan, 1 <<< 18},
+    {Openflow.Action.PushMpls, 1 <<< 19},
+    {Openflow.Action.PopMpls, 1 <<< 20},
+    {Openflow.Action.SetQueue, 1 <<< 21},
+    {Openflow.Action.Group, 1 <<< 22},
+    {Openflow.Action.SetNwTtl, 1 <<< 23},
+    {Openflow.Action.DecNwTtl, 1 <<< 24},
+    {Openflow.Action.SetField, 1 <<< 25},
+    {Openflow.Action.PushPbb, 1 <<< 26},
+    {Openflow.Action.PopPbb, 1 <<< 27},
+    {Openflow.Action.Encap, 1 <<< 28},
+    {Openflow.Action.Decap, 1 <<< 29},
+    {Openflow.Action.SetSequence, 1 <<< 30},
+    {Openflow.Action.ValidateSequence, 1 <<< 31},
+    {Openflow.Action.Experimenter, 0xFFFF}
+  ],
+  action_vendor: [
+    nicira_ext_action: 0x00002320,
+    onf_ext_action: 0x4F4E4600
+  ],
+  onf_ext_action: [
+    {Openflow.Action.OnfCopyField, 3200}
+  ],
+  nicira_ext_action: [
+    {Openflow.Action.NxResubmit, 1},
+    {Openflow.Action.NxSetTunnel, 2},
+    # {Openflow.Action.NxSetQueue, 4}, Deprecated
+    # {Openflow.Action.NxPopQueue, 5}, Deprecated
+    {Openflow.Action.NxRegMove, 6},
+    {Openflow.Action.NxRegLoad, 7},
+    {Openflow.Action.NxNote, 8},
+    {Openflow.Action.NxSetTunnel64, 9},
+    {Openflow.Action.NxMultipath, 10},
+    {Openflow.Action.NxBundle, 12},
+    {Openflow.Action.NxBundleLoad, 13},
+    {Openflow.Action.NxResubmitTable, 14},
+    {Openflow.Action.NxOutputReg, 15},
+    {Openflow.Action.NxLearn, 16},
+    {Openflow.Action.NxExit, 17},
+    {Openflow.Action.NxDecTtl, 18},
+    {Openflow.Action.NxFinTimeout, 19},
+    {Openflow.Action.NxController, 20},
+    {Openflow.Action.NxDecTtlCntIds, 21},
+    {Openflow.Action.NxWriteMetadata, 22},
+    # {Openflow.Action.NxPushMpls, 23}, # Deprecated
+    # {Openflow.Action.NxPopMpls, 24}, # Deprecated
+    # {Openflow.Action.NxSetMplsTtl, 25}, Deprecated
+    # {Openflow.Action.NxDecMplsTtl, 26}, Deprecated
+    {Openflow.Action.NxStackPush, 27},
+    {Openflow.Action.NxStackPop, 28},
+    {Openflow.Action.NxSample, 29},
+    # {Openflow.Action.NxSetMplsLabel, 30}, Deprecated
+    # {Openflow.Action.NxSetMplsTc, 31}, Deprecated
+    {Openflow.Action.NxOutputReg2, 32},
+    {Openflow.Action.NxRegLoad2, 33},
+    {Openflow.Action.NxConjunction, 34},
+    {Openflow.Action.NxConntrack, 35},
+    {Openflow.Action.NxNat, 36},
+    {Openflow.Action.NxController2, 37},
+    {Openflow.Action.NxSample2, 38},
+    {Openflow.Action.NxOutputTrunc, 39},
+    {Openflow.Action.NxGroup, 40},
+    {Openflow.Action.NxSample3, 41},
+    {Openflow.Action.NxClone, 42},
+    {Openflow.Action.NxCtClear, 43},
+    {Openflow.Action.NxResubmitTableCt, 44},
+    {Openflow.Action.NxLearn2, 45},
+    {Openflow.Action.NxEncap, 46},
+    {Openflow.Action.NxDecap, 47},
+    {Openflow.Action.NxDebugRecirc, 0xFF}
+  ],
+  nx_mp_algorithm: [
+    modulo_n: 0,
+    hash_threshold: 1,
+    highest_random_weight: 2,
+    iterative_hash: 3
+  ],
+  nx_hash_fields: [
+    eth_src: 0,
+    symmetric_l4: 1,
+    symmetric_l3l4: 2,
+    symmetric_l3l4_udp: 3,
+    nw_src: 4,
+    nw_dst: 5
+  ],
+  nx_bd_algorithm: [
+    active_backup: 0,
+    highest_random_weight: 1
+  ],
+  nx_learn_flag: [
+    send_flow_rem: 1 <<< 0,
+    delete_learned: 1 <<< 1,
+    write_result: 1 <<< 2
+  ],
+  nx_conntrack_flags: [
+    commit: 1 <<< 0,
+    force: 1 <<< 1
+  ],
+  nx_nat_flags: [
+    src: 1 <<< 0,
+    dst: 1 <<< 1,
+    persistent: 1 <<< 2,
+    protocol_hash: 1 <<< 3,
+    protocol_random: 1 <<< 4
+  ],
+  nx_nat_range: [
+    ipv4_min: 1 <<< 0,
+    ipv4_max: 1 <<< 1,
+    ipv6_min: 1 <<< 2,
+    ipv6_max: 1 <<< 3,
+    proto_min: 1 <<< 4,
+    proto_max: 1 <<< 5
+  ],
+  nx_action_controller2_prop_type: [
+    max_len: 0,
+    controller_id: 1,
+    reason: 2,
+    userdata: 3,
+    pause: 4
+  ],
+  nx_action_sample_direction: [
+    default: 0,
+    ingress: 1,
+    egress: 2
+  ],
+  nx_flow_spec_type: [
+    {Openflow.Action.NxFlowSpecMatch, 0},
+    {Openflow.Action.NxFlowSpecLoad, 1},
+    {Openflow.Action.NxFlowSpecOutput, 2}
+  ],
+  instruction_type: [
+    {Openflow.Instruction.GotoTable, 1},
+    {Openflow.Instruction.WriteMetadata, 2},
+    {Openflow.Instruction.WriteActions, 3},
+    {Openflow.Instruction.ApplyActions, 4},
+    {Openflow.Instruction.ClearActions, 5},
+    {Openflow.Instruction.Meter, 6},
+    {Openflow.Instruction.Experimenter, 0xFFFF}
+  ],
+  controller_role: [
+    nochange: 0,
+    equal: 1,
+    master: 2,
+    slave: 3
+  ],
+  nx_role: [
+    other: 0,
+    master: 1,
+    slave: 2
+  ],
+  packet_in_format: [
+    standard: 0,
+    nxt_packet_in: 1,
+    nxt_packet_in2: 2
+  ],
+  flow_format: [
+    openflow10: 0,
+    nxm: 1
+  ],
+  packet_in2_prop_type: [
+    packet: 0,
+    full_len: 1,
+    buffer_id: 2,
+    table_id: 3,
+    cookie: 4,
+    reason: 5,
+    metadata: 6,
+    userdata: 7,
+    continuation: 8
+  ],
+  continuation_prop_type: [
+    bridge: 0x8000,
+    stack: 0x8001,
+    mirrors: 0x8002,
+    conntracked: 0x8003,
+    table_id: 0x8004,
+    cookie: 0x8005,
+    actions: 0x8006,
+    action_set: 0x8007
+  ],
+  flow_monitor_flag: [
+    initial: 1 <<< 0,
+    add: 1 <<< 1,
+    delete: 1 <<< 2,
+    modify: 1 <<< 3,
+    actions: 1 <<< 4,
+    own: 1 <<< 5
+  ],
+  flow_update_event: [
+    added: 0,
+    deleted: 1,
+    modified: 2,
+    abbrev: 3
+  ],
+  tlv_table_mod_command: [
+    add: 0,
+    delete: 1,
+    clear: 2
+  ],
+  table_feature_prop_type: [
+    instructions: 0,
+    instructions_miss: 1,
+    next_tables: 2,
+    next_tables_miss: 3,
+    write_actions: 4,
+    write_actions_miss: 5,
+    apply_actions: 6,
+    apply_actions_miss: 7,
+    match: 8,
+    wildcards: 10,
+    write_setfield: 12,
+    write_setfield_miss: 13,
+    apply_setfield: 14,
+    apply_setfield_miss: 15,
+    experimenter: 0xFFFE,
+    experimenter_miss: 0xFFFF
+  ],
+  bundle_ctrl_type: [
+    open_request: 0,
+    open_reply: 1,
+    close_request: 2,
+    close_reply: 3,
+    commit_request: 4,
+    commit_reply: 5,
+    discard_request: 6,
+    discard_reply: 7
+  ],
+  bundle_flags: [
+    atomic: 1 <<< 0,
+    ordered: 1 <<< 1
+  ]
 ]
 
 File.write(
@@ -1043,129 +1072,128 @@ File.write(
 )
 
 for {enum_name, enum_def} <- enums do
-    to_int_fn_name = :"#{enum_name}_to_int"
-
-    for {key, _value} <- enum_def do
-      File.write(
-        "lib/openflow/enums.ex",
-    """
-    def to_int(#{inspect(key)}, :#{enum_name}) do
-    #{to_int_fn_name}(#{inspect(key)})
-    catch
-    _class, _reason -> #{inspect(key)}
-    end\n
-    """,
-        [:append, :binary]
-      )
-    end
+  to_int_fn_name = :"#{enum_name}_to_int"
 
+  for {key, _value} <- enum_def do
     File.write(
       "lib/openflow/enums.ex",
+      """
+      def to_int(#{inspect(key)}, :#{enum_name}) do
+      #{to_int_fn_name}(#{inspect(key)})
+      catch
+      _class, _reason -> #{inspect(key)}
+      end\n
+      """,
+      [:append, :binary]
+    )
+  end
+
+  File.write(
+    "lib/openflow/enums.ex",
     """
     def to_int(_int, :#{enum_name}) do
     throw(:bad_enum)
     end\n
     """,
+    [:append, :binary]
+  )
+end
+
+for {enum_name, enum_def} <- enums do
+  to_atom_fn_name = :"#{enum_name}_to_atom"
+
+  for {_key, value} <- enum_def do
+    File.write(
+      "lib/openflow/enums.ex",
+      """
+      def to_atom(#{inspect(value, base: :hex)}, :#{enum_name}) do
+      #{to_atom_fn_name}(#{inspect(value, base: :hex)})
+      catch
+      _class, _reason -> #{value}
+      end\n
+      """,
       [:append, :binary]
     )
   end
 
-  for {enum_name, enum_def} <- enums do
-    to_atom_fn_name = :"#{enum_name}_to_atom"
-
-    for {_key, value} <- enum_def do
-      File.write(
-        "lib/openflow/enums.ex",
-    """
-    def to_atom(#{inspect(value, base: :hex)}, :#{enum_name}) do
-    #{to_atom_fn_name}(#{inspect(value, base: :hex)})
-    catch
-    _class, _reason -> #{value}
-    end\n
-    """,
-        [:append, :binary]
-      )
-    end
-
-    File.write(
-      "lib/openflow/enums.ex",
+  File.write(
+    "lib/openflow/enums.ex",
     """
     def to_atom(_, :#{enum_name}) do
     throw(:bad_enum)
     end\n
     """,
-      [:append, :binary]
+    [:append, :binary]
+  )
+end
+
+for {enum_name, enum_def} <- enums do
+  to_int_fn_name = :"#{enum_name}_to_int"
+  to_atom_fn_name = :"#{enum_name}_to_atom"
+
+  for {key, value} <- enum_def do
+    File.write(
+      "lib/openflow/enums.ex",
+      "  def #{to_int_fn_name}(#{inspect(key)}), do: #{inspect(value, base: :hex)}\n",
+      [
+        :append,
+        :binary
+      ]
     )
   end
 
-  for {enum_name, enum_def} <- enums do
-    to_int_fn_name = :"#{enum_name}_to_int"
-    to_atom_fn_name = :"#{enum_name}_to_atom"
+  File.write("lib/openflow/enums.ex", "  def #{to_int_fn_name}(_), do: throw(:bad_enum)\n", [
+    :append,
+    :binary
+  ])
 
-    for {key, value} <- enum_def do
-      File.write(
-        "lib/openflow/enums.ex",
-        "  def #{to_int_fn_name}(#{inspect(key)}), do: #{inspect(value, base: :hex)}\n",
-        [
-          :append,
-          :binary
-        ]
-      )
-    end
-
-    File.write("lib/openflow/enums.ex", "  def #{to_int_fn_name}(_), do: throw(:bad_enum)\n", [
-          :append,
-          :binary
-        ])
-
-    for {key, value} <- enum_def do
-      File.write(
-        "lib/openflow/enums.ex",
-        "  def #{to_atom_fn_name}(#{inspect(value, base: :hex)}), do: #{inspect(key)}\n",
-        [
-          :append,
-          :binary
-        ]
-      )
-    end
-
-    File.write("lib/openflow/enums.ex", "  def #{to_atom_fn_name}(_), do: throw(:bad_enum)\n", [
-          :append,
-          :binary
-        ])
-  end
-
-  for {enum_name, _enum_def} <- enums do
+  for {key, value} <- enum_def do
     File.write(
       "lib/openflow/enums.ex",
+      "  def #{to_atom_fn_name}(#{inspect(value, base: :hex)}), do: #{inspect(key)}\n",
+      [
+        :append,
+        :binary
+      ]
+    )
+  end
+
+  File.write("lib/openflow/enums.ex", "  def #{to_atom_fn_name}(_), do: throw(:bad_enum)\n", [
+    :append,
+    :binary
+  ])
+end
+
+for {enum_name, _enum_def} <- enums do
+  File.write(
+    "lib/openflow/enums.ex",
     """
     def int_to_flags(int, :#{enum_name}) do
     Openflow.Utils.int_to_flags([], int, enum_of(:#{enum_name}))
     end\n
     """,
-      [:append, :binary]
-    )
-  end
+    [:append, :binary]
+  )
+end
 
-  for {enum_name, _enum_def} <- enums do
-    File.write(
-      "lib/openflow/enums.ex",
+for {enum_name, _enum_def} <- enums do
+  File.write(
+    "lib/openflow/enums.ex",
     """
     def flags_to_int(flags, :#{enum_name}) do
     Openflow.Utils.flags_to_int(0, flags, enum_of(:#{enum_name}))
     end\n
     """,
-      [:append, :binary]
-    )
-  end
+    [:append, :binary]
+  )
+end
 
-  for {enum_name, enum_def} <- enums do
-    File.write(
-      "lib/openflow/enums.ex",
-      "  defp enum_of(:#{enum_name}), do: #{inspect(enum_def, pretty: true, limit: 100_000)}\n",
-      [:append, :binary]
-    )
-  end
-
-  File.write("lib/openflow/enums.ex", "end", [:append, :binary])
+for {enum_name, enum_def} <- enums do
+  File.write(
+    "lib/openflow/enums.ex",
+    "  defp enum_of(:#{enum_name}), do: #{inspect(enum_def, pretty: true, limit: 100_000)}\n",
+    [:append, :binary]
+  )
+end
 
+File.write("lib/openflow/enums.ex", "end", [:append, :binary])
diff --git a/test/lib/openflow/ofp_group_desc_stats_test.exs b/test/lib/openflow/ofp_group_desc_stats_test.exs
new file mode 100644
index 0000000..f8f2a12
--- /dev/null
+++ b/test/lib/openflow/ofp_group_desc_stats_test.exs
@@ -0,0 +1,50 @@
+defmodule OfpGroupDescTest do
+  use ExUnit.Case
+
+  describe "Openflow.Multipart.GroupDesc.Request" do
+    test "with default values" do
+      desc = Openflow.Multipart.GroupDesc.Request.new(0)
+
+      desc
+      |> Openflow.to_binary()
+      |> Openflow.read()
+      |> Kernel.elem(1)
+      |> Kernel.==(desc)
+      |> assert()
+    end
+  end
+
+  describe "Openflow.Multipart.GroupDesc.Reply" do
+    test "with test packet_data" do
+      group_desc_stats =
+        "test/packet_data/4-34-ofp_group_desc_reply.packet"
+        |> File.read!()
+        |> Openflow.read()
+        |> Kernel.elem(1)
+
+      %Openflow.Multipart.GroupDesc.Reply{
+        aux_id: nil,
+        datapath_id: nil,
+        flags: [],
+        groups: [
+          %Openflow.Multipart.GroupDescStats{
+            buckets: [
+              %Openflow.Bucket{
+                actions: [
+                  %Openflow.Action.Output{max_len: :no_buffer, port_number: 2}
+                ],
+                watch_group: 1,
+                watch_port: 1,
+                weight: 1
+              }
+            ],
+            group_id: 1,
+            type: :all
+          }
+        ],
+        version: 4,
+        xid: 0
+      } = group_desc_stats
+    end
+  end
+end
diff --git a/test/lib/openflow/ofp_group_features_stats_test.exs b/test/lib/openflow/ofp_group_features_stats_test.exs
new file mode 100644
index 0000000..695b377
--- /dev/null
+++ b/test/lib/openflow/ofp_group_features_stats_test.exs
@@ -0,0 +1,104 @@
+defmodule OfpGroupFeaturesTest do
+  use ExUnit.Case
+
+  describe "Openflow.Multipart.GroupFeatures.Request" do
+    test "with default values" do
+      features = Openflow.Multipart.GroupFeatures.Request.new(0)
+
+      features
+      |> Openflow.to_binary()
+      |> Openflow.read()
+      |> Kernel.elem(1)
+      |> Kernel.==(features)
+      |> assert()
+    end
+  end
+
+  describe "Openflow.Multipart.GroupFeatures.Reply" do
+    test "with test packet_data" do
+      group_features_stats =
+        "test/packet_data/4-32-ofp_group_features_reply.packet"
+        |> File.read!()
+        |> Openflow.read()
+        |> Kernel.elem(1)
+
+      %Openflow.Multipart.GroupFeatures.Reply{
+        actions_for_all: [
+          Openflow.Action.Output,
+          Openflow.Action.CopyTtlOut,
+          Openflow.Action.CopyTtlIn,
+          Openflow.Action.SetMplsTtl,
+          Openflow.Action.DecMplsTtl,
+          Openflow.Action.PushVlan,
+          Openflow.Action.PopVlan,
+          Openflow.Action.PushMpls,
+          Openflow.Action.PopMpls,
+          Openflow.Action.SetQueue,
+          Openflow.Action.Group,
+          Openflow.Action.SetNwTtl,
+          Openflow.Action.DecNwTtl,
+          Openflow.Action.SetField
+        ],
+        actions_for_fast_failover: [
+          Openflow.Action.Output,
+          Openflow.Action.CopyTtlOut,
+          Openflow.Action.CopyTtlIn,
+          Openflow.Action.SetMplsTtl,
+          Openflow.Action.DecMplsTtl,
+          Openflow.Action.PushVlan,
+          Openflow.Action.PopVlan,
+          Openflow.Action.PushMpls,
+          Openflow.Action.PopMpls,
+          Openflow.Action.SetQueue,
+          Openflow.Action.Group,
+          Openflow.Action.SetNwTtl,
+          Openflow.Action.DecNwTtl,
+          Openflow.Action.SetField
+        ],
+        actions_for_indirect: [
+          Openflow.Action.Output,
+          Openflow.Action.CopyTtlOut,
+          Openflow.Action.CopyTtlIn,
+          Openflow.Action.SetMplsTtl,
+          Openflow.Action.DecMplsTtl,
+          Openflow.Action.PushVlan,
+          Openflow.Action.PopVlan,
+          Openflow.Action.PushMpls,
+          Openflow.Action.PopMpls,
+          Openflow.Action.SetQueue,
+          Openflow.Action.Group,
+          Openflow.Action.SetNwTtl,
+          Openflow.Action.DecNwTtl,
+          Openflow.Action.SetField
+        ],
+        actions_for_select: [
+          Openflow.Action.Output,
+          Openflow.Action.CopyTtlOut,
+          Openflow.Action.CopyTtlIn,
+          Openflow.Action.SetMplsTtl,
+          Openflow.Action.DecMplsTtl,
+          Openflow.Action.PushVlan,
+          Openflow.Action.PopVlan,
+          Openflow.Action.PushMpls,
+          Openflow.Action.PopMpls,
+          Openflow.Action.SetQueue,
+          Openflow.Action.Group,
+          Openflow.Action.SetNwTtl,
+          Openflow.Action.DecNwTtl,
+          Openflow.Action.SetField
+        ],
+        aux_id: nil,
+        capabilities: [:select_weight, :chaining],
+        datapath_id: nil,
+        flags: [],
+        max_groups_for_all: 16_777_216,
+        max_groups_for_fast_failover: 16_777_216,
+        max_groups_for_indirect: 16_777_216,
+        max_groups_for_select: 16_777_216,
+        types: [:all, :select, :indirect, :fast_failover],
+        version: 4,
+        xid: 0
+      } = group_features_stats
+    end
+  end
+end