diff --git a/lib/openflow/actions/nx_conjunction.ex b/lib/openflow/actions/nx_conjunction.ex
index 5aa65cf..4e073b6 100644
--- a/lib/openflow/actions/nx_conjunction.ex
+++ b/lib/openflow/actions/nx_conjunction.ex
@@ -13,11 +13,15 @@ defmodule Openflow.Action.NxConjunction do
 
   @spec new(Keyword.t()) :: %NxConjunction{}
   def new(options) do
+    clause = (options[:clause] || 0) + 1
     n_clauses = options[:n_clauses] || raise "n_clauses must be specified"
     n_clauses >= 2 || raise "n_clauses must be greater than 1"
 
+    (1 <= clause and clause <= n_clauses and 2 <= n_clauses and n_clauses <= 64) ||
+      raise "conjunction(id, k/n) must satisfy 1 <= k <= n and 2 <= n <= 64"
+
     %NxConjunction{
-      clause: (options[:clause] || 0) + 1,
+      clause: clause,
       n_clauses: n_clauses,
       id: options[:id] || 0
     }
diff --git a/lib/openflow/echo.ex b/lib/openflow/echo.ex
deleted file mode 100644
index d0cea11..0000000
--- a/lib/openflow/echo.ex
+++ /dev/null
@@ -1,2 +0,0 @@
-defmodule Openflow.Echo do
-end
diff --git a/lib/openflow/echo/reply.ex b/lib/openflow/echo/reply.ex
index 9b0b2d8..f78013a 100644
--- a/lib/openflow/echo/reply.ex
+++ b/lib/openflow/echo/reply.ex
@@ -11,8 +11,18 @@ defmodule Openflow.Echo.Reply do
 
   alias __MODULE__
 
+  @type t :: %Reply{
+          version: 4,
+          xid: 0..0xFFFFFFFF,
+          data: String.t(),
+          datapath_id: String.t() | nil,
+          aux_id: 0..0xFFFF | nil
+        }
+
+  @spec ofp_type :: 3
   def ofp_type, do: 3
 
+  @spec new(xid: 0..0xFFFFFFFF, data: String.t()) :: t()
   def new(options) when is_list(options) do
     %Reply{
       xid: options[:xid] || 0,
@@ -20,15 +30,15 @@ defmodule Openflow.Echo.Reply do
     }
   end
 
-  def new(data) when is_binary(data) do
-    %Reply{data: data}
-  end
+  @spec new(String.t()) :: t()
+  def new(data) when is_binary(data), do: %Reply{data: data}
 
-  def read(data) do
-    %Reply{data: data}
-  end
+  @spec new() :: t()
+  def new, do: new([])
 
-  def to_binary(%Reply{data: data}) do
-    data
-  end
+  @spec read(String.t()) :: t()
+  def read(data), do: %Reply{data: data}
+
+  @spec to_binary(t()) :: String.t()
+  def to_binary(%Reply{data: data}), do: data
 end
diff --git a/lib/openflow/echo/request.ex b/lib/openflow/echo/request.ex
index a1684d6..a433f4f 100644
--- a/lib/openflow/echo/request.ex
+++ b/lib/openflow/echo/request.ex
@@ -11,8 +11,18 @@ defmodule Openflow.Echo.Request do
 
   alias __MODULE__
 
+  @type t :: %Request{
+          version: 4,
+          xid: 0..0xFFFFFFFF,
+          data: String.t(),
+          datapath_id: String.t() | nil,
+          aux_id: 0..0xFFFF | nil
+        }
+
+  @spec ofp_type :: 2
   def ofp_type, do: 2
 
+  @spec new(xid: 0..0xFFFFFFFF, data: String.t()) :: t()
   def new(options) when is_list(options) do
     %Request{
       xid: options[:xid] || 0,
@@ -20,15 +30,15 @@ defmodule Openflow.Echo.Request do
     }
   end
 
-  def new(data) when is_binary(data) do
-    %Request{data: data}
-  end
+  @spec new(String.t()) :: t()
+  def new(data) when is_binary(data), do: %Request{data: data}
 
-  def read(data) do
-    %Request{data: data}
-  end
+  @spec new() :: t()
+  def new, do: new([])
 
-  def to_binary(%Request{data: data}) do
-    data
-  end
+  @spec read(String.t()) :: t()
+  def read(data), do: %Request{data: data}
+
+  @spec to_binary(t()) :: String.t()
+  def to_binary(%Request{data: data}), do: data
 end
diff --git a/lib/openflow/enum_gen.ex b/lib/openflow/enum_gen.ex
deleted file mode 100644
index afeeb11..0000000
--- a/lib/openflow/enum_gen.ex
+++ /dev/null
@@ -1,1147 +0,0 @@
-defmodule Openflow.EnumGen do
-  import Bitwise
-
-  @enums [
-    openflow_codec: [
-      {Openflow.Hello, 0},
-      {Openflow.ErrorMsg, 1},
-      {Openflow.Echo.Request, 2},
-      {Openflow.Echo.Reply, 3},
-      {Openflow.Experimenter, 4},
-      {Openflow.Features.Request, 5},
-      {Openflow.Features.Reply, 6},
-      {Openflow.GetConfig.Request, 7},
-      {Openflow.GetConfig.Reply, 8},
-      {Openflow.SetConfig, 9},
-      {Openflow.PacketIn, 10},
-      {Openflow.FlowRemoved, 11},
-      {Openflow.PortStatus, 12},
-      {Openflow.PacketOut, 13},
-      {Openflow.FlowMod, 14},
-      {Openflow.GroupMod, 15},
-      {Openflow.PortMod, 16},
-      {Openflow.TableMod, 17},
-      {Openflow.Multipart.Request, 18},
-      {Openflow.Multipart.Reply, 19},
-      {Openflow.Barrier.Request, 20},
-      {Openflow.Barrier.Reply, 21},
-      {Openflow.Role.Request, 24},
-      {Openflow.Role.Reply, 25},
-      {Openflow.GetAsync.Request, 26},
-      {Openflow.GetAsync.Reply, 27},
-      {Openflow.SetAsync, 28},
-      {Openflow.MeterMod, 29}
-    ],
-    experimenter_id: [
-      nicira_ext_message: 0x00002320,
-      onf_ext_message: 0x4F4E4600
-    ],
-    nicira_ext_message: [
-      # {Openflow.NxRole.Request,        10}, /* Openflow 1.3 support role request/reply */
-      # {Openflow.NxRole.Reply,          11},
-      # {Openflow.NxSetFlowFormat,       12}, /* No special reason for implement this struct codec. */
-      # {Openflow.NxFlowMod,             13}, /* Prefer use ofp_flow_mod to nx_flow_mod */
-      # {Openflow.NxFlowRemoved,         14}, /* Prefer use ofp_flow_removed to nx_flow_removed */
-      # {Openflow.NxSetFlowModTableId,   15}, /* OpenFlow 1.3 support multiple flow table. */
-      {Openflow.NxSetPacketInFormat, 16},
-      # {Openflow.NxPacketIn,            17}, /* No special reason for implement this struct codec. */
-      # {Openflow.NxFlowAge,             18}, /* No special reason for implement this struct codec. */
-      # {Openflow.NxSetAsyncConfig,      19}, /* Openflow 1.3 support async config. */
-      {Openflow.NxSetControllerId, 20},
-      {Openflow.NxFlowMonitor.Cancel, 21},
-      {Openflow.NxFlowMonitor.Paused, 22},
-      {Openflow.NxFlowMonitor.Resumed, 23},
-      {Openflow.NxTLVTableMod, 24},
-      {Openflow.NxTLVTable.Request, 25},
-      {Openflow.NxTLVTable.Reply, 26},
-      {Openflow.NxSetAsyncConfig2, 27},
-      {Openflow.NxResume, 28},
-      {Openflow.NxCtFlushZone, 29},
-      {Openflow.NxPacketIn2, 30}
-    ],
-    onf_ext_message: [
-      {Openflow.OnfBundleControl, 2300},
-      {Openflow.OnfBundleAddMessage, 2301}
-    ],
-    multipart_request_flags: [
-      more: 1 <<< 0
-    ],
-    multipart_reply_flags: [
-      more: 1 <<< 0
-    ],
-    multipart_request_codec: [
-      {Openflow.Multipart.Desc.Request, 0},
-      {Openflow.Multipart.Flow.Request, 1},
-      {Openflow.Multipart.Aggregate.Request, 2},
-      {Openflow.Multipart.Table.Request, 3},
-      {Openflow.Multipart.PortStats.Request, 4},
-      {Openflow.Multipart.Queue.Request, 5},
-      {Openflow.Multipart.Group.Request, 6},
-      {Openflow.Multipart.GroupDesc.Request, 7},
-      {Openflow.Multipart.GroupFeatures.Request, 8},
-      {Openflow.Multipart.Meter.Request, 9},
-      {Openflow.Multipart.MeterConfig.Request, 10},
-      {Openflow.Multipart.MeterFeatures.Request, 11},
-      {Openflow.Multipart.TableFeatures.Request, 12},
-      {Openflow.Multipart.PortDesc.Request, 13},
-      {Openflow.Multipart.Experimenter.Request, 0xFFFF}
-    ],
-    multipart_reply_codec: [
-      {Openflow.Multipart.Desc.Reply, 0},
-      {Openflow.Multipart.Flow.Reply, 1},
-      {Openflow.Multipart.Aggregate.Reply, 2},
-      {Openflow.Multipart.Table.Reply, 3},
-      {Openflow.Multipart.PortStats.Reply, 4},
-      {Openflow.Multipart.Queue.Reply, 5},
-      {Openflow.Multipart.Group.Reply, 6},
-      {Openflow.Multipart.GroupDesc.Reply, 7},
-      {Openflow.Multipart.GroupFeatures.Reply, 8},
-      {Openflow.Multipart.Meter.Reply, 9},
-      {Openflow.Multipart.MeterConfig.Reply, 10},
-      {Openflow.Multipart.MeterFeatures.Reply, 11},
-      {Openflow.Multipart.TableFeatures.Reply, 12},
-      {Openflow.Multipart.PortDesc.Reply, 13},
-      {Openflow.Multipart.Experimenter.Reply, 0xFFFF}
-    ],
-    nicira_ext_stats: [
-      {Openflow.Multipart.NxFlow, 0},
-      {Openflow.Multipart.NxAggregate, 1},
-      {Openflow.Multipart.NxFlowMonitor, 2},
-      {Openflow.Multipart.NxIPFIXBridge, 3},
-      {Openflow.Multipart.NxIPFIXFlow, 4}
-    ],
-    hello_elem: [
-      versionbitmap: 1
-    ],
-    error_type: [
-      hello_failed: 0,
-      bad_request: 1,
-      bad_action: 2,
-      bad_instruction: 3,
-      bad_match: 4,
-      flow_mod_failed: 5,
-      group_mod_failed: 6,
-      port_mod_failed: 7,
-      table_mod_failed: 8,
-      queue_op_failed: 9,
-      switch_config_failed: 10,
-      role_request_failed: 11,
-      meter_mod_failed: 12,
-      table_features_failed: 13,
-      experimenter: 0xFFFF
-    ],
-    hello_failed: [
-      inconpatible: 0,
-      eperm: 1
-    ],
-    bad_request: [
-      bad_version: 0,
-      bad_type: 1,
-      bad_multipart: 2,
-      bad_experimeter: 3,
-      bad_exp_type: 4,
-      eperm: 5,
-      bad_len: 6,
-      buffer_empty: 7,
-      buffer_unknown: 8,
-      bad_table_id: 9,
-      is_slave: 10,
-      bad_port: 11,
-      bad_packet: 12,
-      multipart_buffer_overflow: 13,
-      nxm_invalid: 256,
-      nxm_bad_type: 257,
-      must_be_zero: 515,
-      bad_reason: 516,
-      flow_monitor_bad_event: 520,
-      undecodable_error: 521,
-      resume_not_supported: 533,
-      resume_stale: 534
-    ],
-    bad_action: [
-      bad_type: 0,
-      bad_len: 1,
-      bad_experimeter: 2,
-      bad_exp_type: 3,
-      bad_out_port: 4,
-      bad_argument: 5,
-      eperm: 6,
-      too_many: 7,
-      bad_queue: 8,
-      bad_out_group: 9,
-      match_inconsistent: 10,
-      unsupported_order: 11,
-      bad_tag: 12,
-      bad_set_type: 13,
-      bad_set_len: 14,
-      bad_set_argument: 15,
-      must_be_zero: 256,
-      conntrack_not_supported: 265,
-      bad_conjunction: 526
-    ],
-    bad_instruction: [
-      unknown_instruction: 0,
-      unsupported_instruction: 1,
-      bad_table_id: 2,
-      unsupported_metadata: 3,
-      unsupported_metadata_mask: 4,
-      bad_experimeter: 5,
-      bad_exp_type: 6,
-      bad_len: 7,
-      eperm: 8
-    ],
-    bad_match: [
-      bad_type: 0,
-      bad_len: 1,
-      bad_tag: 2,
-      bad_dl_addr_mask: 3,
-      bad_nw_addr_mask: 4,
-      bad_wildcards: 5,
-      bad_field: 6,
-      bad_value: 7,
-      bad_mask: 8,
-      bad_prereq: 9,
-      dup_field: 10,
-      eperm: 11
-    ],
-    flow_mod_failed: [
-      unknown: 0,
-      table_full: 1,
-      bad_table_id: 2,
-      overlap: 3,
-      eperm: 4,
-      bad_timeout: 5,
-      bad_command: 6,
-      bad_flags: 7
-    ],
-    group_mod_failed: [
-      group_exists: 0,
-      invalid_group: 1,
-      weight_unsupported: 2,
-      out_of_groups: 3,
-      ouf_of_buckets: 4,
-      chaining_unsupported: 5,
-      watch_unsupported: 6,
-      loop: 7,
-      unknown_group: 8,
-      chained_group: 9,
-      bad_type: 10,
-      bad_command: 11,
-      bad_bucket: 12,
-      bad_watch: 13,
-      eperm: 14
-    ],
-    port_mod_failed: [
-      bad_port: 0,
-      bad_hw_addr: 1,
-      bad_config: 2,
-      bad_advertise: 3,
-      eperm: 4
-    ],
-    table_mod_failed: [
-      bad_table: 0,
-      bad_config: 1,
-      eperm: 2
-    ],
-    queue_op_failed: [
-      bad_port: 0,
-      bad_queue: 1,
-      eperm: 2
-    ],
-    switch_config_failed: [
-      bad_flags: 0,
-      bad_len: 1,
-      eperm: 2
-    ],
-    role_request_failed: [
-      stale: 0,
-      unsup: 1,
-      bad_role: 2
-    ],
-    meter_mod_failed: [
-      unknown: 0,
-      meter_exists: 1,
-      invalid_meter: 2,
-      unknown_meter: 3,
-      bad_command: 4,
-      bad_flags: 5,
-      bad_rate: 6,
-      bad_burst: 7,
-      bad_band: 8,
-      bad_band_value: 9,
-      out_of_meters: 10,
-      out_of_bands: 11
-    ],
-    table_features_failed: [
-      bad_table: 0,
-      bad_metadata: 1,
-      bad_type: 2,
-      bad_len: 3,
-      bad_argument: 4,
-      eperm: 5
-    ],
-    switch_capabilities: [
-      flow_stats: 1 <<< 0,
-      table_stats: 1 <<< 1,
-      port_stats: 1 <<< 2,
-      group_stats: 1 <<< 3,
-      ip_reasm: 1 <<< 5,
-      queue_stats: 1 <<< 6,
-      arp_match_ip: 1 <<< 7,
-      port_blocked: 1 <<< 8
-    ],
-    config_flags: [
-      drop: 1 <<< 0,
-      reasm: 1 <<< 1
-    ],
-    controller_max_len: [
-      max: 0xFFE5,
-      no_buffer: 0xFFFF
-    ],
-    experimenter_oxm_vendors: [
-      nicira_ext_match: 0x00002320,
-      hp_ext_match: 0x00002428,
-      onf_ext_match: 0x4F4E4600
-    ],
-    match_type: [
-      standard: 0,
-      oxm: 1
-    ],
-    oxm_class: [
-      nxm_0: 0x0000,
-      nxm_1: 0x0001,
-      openflow_basic: 0x8000,
-      packet_register: 0x8001,
-      experimenter: 0xFFFF
-    ],
-    nxm_0: [
-      nx_in_port: 0,
-      nx_eth_dst: 1,
-      nx_eth_src: 2,
-      nx_eth_type: 3,
-      nx_vlan_tci: 4,
-      nx_ip_tos: 5,
-      nx_ip_proto: 6,
-      nx_ipv4_src: 7,
-      nx_ipv4_dst: 8,
-      nx_tcp_src: 9,
-      nx_tcp_dst: 10,
-      nx_udp_src: 11,
-      nx_udp_dst: 12,
-      nx_icmpv4_type: 13,
-      nx_icmpv4_code: 14,
-      nx_arp_op: 15,
-      nx_arp_spa: 16,
-      nx_arp_tpa: 17,
-      nx_tcp_flags: 34
-    ],
-    nxm_1: [
-      reg0: 0,
-      reg1: 1,
-      reg2: 2,
-      reg3: 3,
-      reg4: 4,
-      reg5: 5,
-      reg6: 6,
-      reg7: 7,
-      reg8: 8,
-      reg9: 9,
-      reg10: 10,
-      reg11: 11,
-      reg12: 12,
-      reg13: 13,
-      reg14: 14,
-      reg15: 15,
-      tun_id: 16,
-      nx_arp_sha: 17,
-      nx_arp_tha: 18,
-      nx_ipv6_src: 19,
-      nx_ipv6_dst: 20,
-      nx_icmpv6_type: 21,
-      nx_icmpv6_code: 22,
-      nx_ipv6_nd_target: 23,
-      nx_ipv6_nd_sll: 24,
-      nx_ipv6_nd_tll: 25,
-      nx_ip_frag: 26,
-      nx_ipv6_label: 27,
-      nx_ip_ecn: 28,
-      nx_ip_ttl: 29,
-      nx_mpls_ttl: 30,
-      tun_src: 31,
-      tun_dst: 32,
-      pkt_mark: 33,
-      dp_hash: 35,
-      recirc_id: 36,
-      conj_id: 37,
-      tun_gbp_id: 38,
-      tun_gbp_flags: 39,
-      tun_metadata0: 40,
-      tun_metadata1: 41,
-      tun_metadata2: 42,
-      tun_metadata3: 43,
-      tun_metadata4: 44,
-      tun_metadata5: 45,
-      tun_metadata6: 46,
-      tun_metadata7: 47,
-      tun_metadata8: 48,
-      tun_metadata9: 49,
-      tun_metadata10: 50,
-      tun_metadata11: 51,
-      tun_metadata12: 52,
-      tun_metadata13: 53,
-      tun_metadata14: 54,
-      tun_metadata15: 55,
-      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
-    ],
-    openflow_basic: [
-      in_port: 0,
-      in_phy_port: 1,
-      metadata: 2,
-      eth_dst: 3,
-      eth_src: 4,
-      eth_type: 5,
-      vlan_vid: 6,
-      vlan_pcp: 7,
-      ip_dscp: 8,
-      ip_ecn: 9,
-      ip_proto: 10,
-      ipv4_src: 11,
-      ipv4_dst: 12,
-      tcp_src: 13,
-      tcp_dst: 14,
-      udp_src: 15,
-      udp_dst: 16,
-      sctp_src: 17,
-      sctp_dst: 18,
-      icmpv4_type: 19,
-      icmpv4_code: 20,
-      arp_op: 21,
-      arp_spa: 22,
-      arp_tpa: 23,
-      arp_sha: 24,
-      arp_tha: 25,
-      ipv6_src: 26,
-      ipv6_dst: 27,
-      ipv6_flabel: 28,
-      icmpv6_type: 29,
-      icmpv6_code: 30,
-      ipv6_nd_target: 31,
-      ipv6_nd_sll: 32,
-      ipv6_nd_tll: 33,
-      mpls_label: 34,
-      mpls_tc: 35,
-      mpls_bos: 36,
-      pbb_isid: 37,
-      tunnel_id: 38,
-      ipv6_exthdr: 39,
-
-      # Lagopus extended match fields
-      pbb_uca: 41,
-      packet_type: 42,
-      gre_flags: 43,
-      gre_ver: 44,
-      gre_protocol: 45,
-      gre_key: 46,
-      gre_seqnum: 47,
-      lisp_flags: 48,
-      lisp_nonce: 49,
-      lisp_id: 50,
-      vxlan_flags: 51,
-      vxlan_vni: 52,
-      mpls_data_first_nibble: 53,
-      mpls_ach_version: 54,
-      mpls_ach_channel: 55,
-      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
-    ],
-    vlan_id: [
-      present: 0x1000,
-      none: 0x0000
-    ],
-    ipv6exthdr_flags: [
-      nonext: 1 <<< 0,
-      esp: 1 <<< 1,
-      auth: 1 <<< 2,
-      dest: 1 <<< 3,
-      frag: 1 <<< 4,
-      router: 1 <<< 5,
-      hop: 1 <<< 6,
-      unrep: 1 <<< 7,
-      unseq: 1 <<< 8
-    ],
-    tcp_flags: [
-      fin: 1 <<< 0,
-      syn: 1 <<< 1,
-      rst: 1 <<< 2,
-      psh: 1 <<< 3,
-      ack: 1 <<< 4,
-      urg: 1 <<< 5,
-      ece: 1 <<< 6,
-      cwr: 1 <<< 7,
-      ns: 1 <<< 8
-    ],
-    ct_state_flags: [
-      # Beginning of a new connection.
-      new: 1 <<< 0,
-      # Part of an existing connection.
-      est: 1 <<< 1,
-      # Related to an established connection.
-      rel: 1 <<< 2,
-      # Flow is in the reply direction.
-      rep: 1 <<< 3,
-      # Could not track connection.
-      inv: 1 <<< 4,
-      # Conntrack has occurred.
-      trk: 1 <<< 5,
-      # Packet's source address/port was mangled by NAT.
-      snat: 1 <<< 6,
-      # Packet's destination address/port was mangled by NAT.
-      dnat: 1 <<< 7
-    ],
-    packet_register: [
-      xreg0: 0,
-      xreg1: 1,
-      xreg2: 2,
-      xreg3: 3,
-      xreg4: 4,
-      xreg5: 5,
-      xreg6: 6,
-      xreg7: 7
-    ],
-    nicira_ext_match: [
-      nsh_flags: 1,
-      nsh_mdtype: 2,
-      nsh_np: 3,
-      nsh_spi: 4,
-      nsh_si: 5,
-      nsh_c1: 6,
-      nsh_c2: 7,
-      nsh_c3: 8,
-      nsh_c4: 9
-    ],
-    hp_ext_match: [
-      hp_udp_src_port_range: 0,
-      hp_udp_dst_port_range: 1,
-      hp_tcp_src_port_range: 2,
-      hp_tcp_dst_port_range: 3,
-      hp_tcp_flags: 4,
-      hp_custom_1: 5,
-      hp_custom_2: 6,
-      hp_custom_3: 7,
-      hp_custom_4: 8
-    ],
-    hp_custom_match_type: [
-      l2_start: 1,
-      l3_start: 2,
-      l4_start: 3
-    ],
-    onf_ext_match: [
-      onf_tcp_flags: 42,
-      onf_actset_output: 43,
-      onf_pbb_uca: 2560
-    ],
-    buffer_id: [
-      no_buffer: 0xFFFFFFFF
-    ],
-    port_config: [
-      port_down: 1 <<< 0,
-      no_receive: 1 <<< 2,
-      no_forward: 1 <<< 5,
-      no_packet_in: 1 <<< 6
-    ],
-    port_state: [
-      link_down: 1 <<< 0,
-      blocked: 1 <<< 1,
-      live: 1 <<< 2
-    ],
-    port_features: [
-      {:"10mb_hd", 1 <<< 0},
-      {:"10mb_fd", 1 <<< 1},
-      {:"100mb_hd", 1 <<< 2},
-      {:"100mb_fd", 1 <<< 3},
-      {:"1gb_hd", 1 <<< 4},
-      {:"1gb_fd", 1 <<< 5},
-      {:"10gb_fd", 1 <<< 6},
-      {:"40gb_fd", 1 <<< 7},
-      {:"100gb_fd", 1 <<< 8},
-      {:"1tb_fd", 1 <<< 9},
-      {:other, 1 <<< 10},
-      {:copper, 1 <<< 11},
-      {:fiber, 1 <<< 12},
-      {:autoneg, 1 <<< 13},
-      {:pause, 1 <<< 14},
-      {:pause_asym, 1 <<< 15}
-    ],
-    openflow10_port_no: [
-      max: 0xFF00,
-      in_port: 0xFFF8,
-      table: 0xFFF9,
-      normal: 0xFFFA,
-      flood: 0xFFFB,
-      all: 0xFFFC,
-      controller: 0xFFFD,
-      local: 0xFFFE,
-      none: 0xFFFF
-    ],
-    openflow13_port_no: [
-      max: 0xFFFFFF00,
-      in_port: 0xFFFFFFF8,
-      table: 0xFFFFFFF9,
-      normal: 0xFFFFFFFA,
-      flood: 0xFFFFFFFB,
-      all: 0xFFFFFFFC,
-      controller: 0xFFFFFFFD,
-      local: 0xFFFFFFFE,
-      any: 0xFFFFFFFF
-    ],
-    packet_in_reason: [
-      no_match: 0,
-      action: 1,
-      invalid_ttl: 2,
-      action_set: 3,
-      group: 4,
-      packet_out: 5
-    ],
-    flow_mod_command: [
-      add: 0,
-      modify: 1,
-      modify_strict: 2,
-      delete: 3,
-      delete_strict: 4
-    ],
-    flow_mod_flags: [
-      send_flow_rem: 1 <<< 0,
-      check_overlap: 1 <<< 1,
-      reset_counts: 1 <<< 2,
-      no_packet_counts: 1 <<< 3,
-      no_byte_counts: 1 <<< 4
-    ],
-    flow_removed_reason: [
-      idle_timeout: 0,
-      hard_timeout: 1,
-      delete: 2,
-      group_delete: 3,
-      meter_delete: 4,
-      eviction: 5
-    ],
-    port_reason: [
-      add: 0,
-      delete: 1,
-      modify: 2
-    ],
-    group_mod_command: [
-      add: 0,
-      modify: 1,
-      delete: 2
-    ],
-    group_type: [
-      all: 0,
-      select: 1,
-      indirect: 2,
-      fast_failover: 3
-    ],
-    group_id: [
-      max: 0xFFFFFF00,
-      all: 0xFFFFFFFC,
-      any: 0xFFFFFFFF
-    ],
-    group_capabilities: [
-      select_weight: 1 <<< 0,
-      select_liveness: 1 <<< 1,
-      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
-    ]
-  ]
-
-  def main(_) do
-    File.write(
-      "lib/openflow/enums.ex",
-      """
-      defmodule Openflow.Enums do
-      @moduledoc "auto generated code"\n
-      """,
-      [:binary]
-    )
-
-    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
-
-      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
-
-      File.write(
-        "lib/openflow/enums.ex",
-        """
-        def to_atom(_, :#{enum_name}) do
-        throw(:bad_enum)
-        end\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"
-
-      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
-      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
-
-    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
-
-    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])
-  end
-end
diff --git a/lib/openflow/enums.ex b/lib/openflow/enums.ex
index 51426c7..11591ad 100644
--- a/lib/openflow/enums.ex
+++ b/lib/openflow/enums.ex
@@ -727,6 +727,18 @@ defmodule Openflow.Enums do
     _class, _reason -> :multipart_buffer_overflow
   end
 
+  def to_int(:multipart_request_timeout, :bad_request) do
+    bad_request_to_int(:multipart_request_timeout)
+  catch
+    _class, _reason -> :multipart_request_timeout
+  end
+
+  def to_int(:multipart_reply_timeout, :bad_request) do
+    bad_request_to_int(:multipart_reply_timeout)
+  catch
+    _class, _reason -> :multipart_reply_timeout
+  end
+
   def to_int(:nxm_invalid, :bad_request) do
     bad_request_to_int(:nxm_invalid)
   catch
@@ -881,10 +893,10 @@ defmodule Openflow.Enums do
     _class, _reason -> :must_be_zero
   end
 
-  def to_int(:conntrack_not_supported, :bad_action) do
-    bad_action_to_int(:conntrack_not_supported)
+  def to_int(:conntrack_datapath_support, :bad_action) do
+    bad_action_to_int(:conntrack_datapath_support)
   catch
-    _class, _reason -> :conntrack_not_supported
+    _class, _reason -> :conntrack_datapath_support
   end
 
   def to_int(:bad_conjunction, :bad_action) do
@@ -951,6 +963,12 @@ defmodule Openflow.Enums do
     _class, _reason -> :eperm
   end
 
+  def to_int(:dup_inst, :bad_instruction) do
+    bad_instruction_to_int(:dup_inst)
+  catch
+    _class, _reason -> :dup_inst
+  end
+
   def to_int(_int, :bad_instruction) do
     throw(:bad_enum)
   end
@@ -1027,6 +1045,12 @@ defmodule Openflow.Enums do
     _class, _reason -> :eperm
   end
 
+  def to_int(:conntrack_datapath_support, :bad_match) do
+    bad_match_to_int(:conntrack_datapath_support)
+  catch
+    _class, _reason -> :conntrack_datapath_support
+  end
+
   def to_int(_int, :bad_match) do
     throw(:bad_enum)
   end
@@ -1173,6 +1197,18 @@ defmodule Openflow.Enums do
     _class, _reason -> :eperm
   end
 
+  def to_int(:unknown_bucket, :group_mod_failed) do
+    group_mod_failed_to_int(:unknown_bucket)
+  catch
+    _class, _reason -> :unknown_bucket
+  end
+
+  def to_int(:bucket_exists, :group_mod_failed) do
+    group_mod_failed_to_int(:bucket_exists)
+  catch
+    _class, _reason -> :bucket_exists
+  end
+
   def to_int(_int, :group_mod_failed) do
     throw(:bad_enum)
   end
@@ -4125,18 +4161,6 @@ defmodule Openflow.Enums do
     _class, _reason -> Openflow.Action.NxSetTunnel
   end
 
-  def to_int(Openflow.Action.NxSetQueue, :nicira_ext_action) do
-    nicira_ext_action_to_int(Openflow.Action.NxSetQueue)
-  catch
-    _class, _reason -> Openflow.Action.NxSetQueue
-  end
-
-  def to_int(Openflow.Action.NxPopQueue, :nicira_ext_action) do
-    nicira_ext_action_to_int(Openflow.Action.NxPopQueue)
-  catch
-    _class, _reason -> Openflow.Action.NxPopQueue
-  end
-
   def to_int(Openflow.Action.NxRegMove, :nicira_ext_action) do
     nicira_ext_action_to_int(Openflow.Action.NxRegMove)
   catch
@@ -4233,30 +4257,6 @@ defmodule Openflow.Enums do
     _class, _reason -> Openflow.Action.NxWriteMetadata
   end
 
-  def to_int(Openflow.Action.NxPushMpls, :nicira_ext_action) do
-    nicira_ext_action_to_int(Openflow.Action.NxPushMpls)
-  catch
-    _class, _reason -> Openflow.Action.NxPushMpls
-  end
-
-  def to_int(Openflow.Action.NxPopMpls, :nicira_ext_action) do
-    nicira_ext_action_to_int(Openflow.Action.NxPopMpls)
-  catch
-    _class, _reason -> Openflow.Action.NxPopMpls
-  end
-
-  def to_int(Openflow.Action.NxSetMplsTtl, :nicira_ext_action) do
-    nicira_ext_action_to_int(Openflow.Action.NxSetMplsTtl)
-  catch
-    _class, _reason -> Openflow.Action.NxSetMplsTtl
-  end
-
-  def to_int(Openflow.Action.NxDecMplsTtl, :nicira_ext_action) do
-    nicira_ext_action_to_int(Openflow.Action.NxDecMplsTtl)
-  catch
-    _class, _reason -> Openflow.Action.NxDecMplsTtl
-  end
-
   def to_int(Openflow.Action.NxStackPush, :nicira_ext_action) do
     nicira_ext_action_to_int(Openflow.Action.NxStackPush)
   catch
@@ -4275,18 +4275,6 @@ defmodule Openflow.Enums do
     _class, _reason -> Openflow.Action.NxSample
   end
 
-  def to_int(Openflow.Action.NxSetMplsLabel, :nicira_ext_action) do
-    nicira_ext_action_to_int(Openflow.Action.NxSetMplsLabel)
-  catch
-    _class, _reason -> Openflow.Action.NxSetMplsLabel
-  end
-
-  def to_int(Openflow.Action.NxSetMplsTc, :nicira_ext_action) do
-    nicira_ext_action_to_int(Openflow.Action.NxSetMplsTc)
-  catch
-    _class, _reason -> Openflow.Action.NxSetMplsTc
-  end
-
   def to_int(Openflow.Action.NxOutputReg2, :nicira_ext_action) do
     nicira_ext_action_to_int(Openflow.Action.NxOutputReg2)
   catch
@@ -5895,6 +5883,18 @@ defmodule Openflow.Enums do
     _class, _reason -> 13
   end
 
+  def to_atom(0xE, :bad_request) do
+    bad_request_to_atom(0xE)
+  catch
+    _class, _reason -> 14
+  end
+
+  def to_atom(0xF, :bad_request) do
+    bad_request_to_atom(0xF)
+  catch
+    _class, _reason -> 15
+  end
+
   def to_atom(0x100, :bad_request) do
     bad_request_to_atom(0x100)
   catch
@@ -6119,6 +6119,12 @@ defmodule Openflow.Enums do
     _class, _reason -> 8
   end
 
+  def to_atom(0x100, :bad_instruction) do
+    bad_instruction_to_atom(0x100)
+  catch
+    _class, _reason -> 256
+  end
+
   def to_atom(_, :bad_instruction) do
     throw(:bad_enum)
   end
@@ -6195,6 +6201,12 @@ defmodule Openflow.Enums do
     _class, _reason -> 11
   end
 
+  def to_atom(0x108, :bad_match) do
+    bad_match_to_atom(0x108)
+  catch
+    _class, _reason -> 264
+  end
+
   def to_atom(_, :bad_match) do
     throw(:bad_enum)
   end
@@ -6341,6 +6353,18 @@ defmodule Openflow.Enums do
     _class, _reason -> 14
   end
 
+  def to_atom(0xF, :group_mod_failed) do
+    group_mod_failed_to_atom(0xF)
+  catch
+    _class, _reason -> 15
+  end
+
+  def to_atom(0x10, :group_mod_failed) do
+    group_mod_failed_to_atom(0x10)
+  catch
+    _class, _reason -> 16
+  end
+
   def to_atom(_, :group_mod_failed) do
     throw(:bad_enum)
   end
@@ -9293,18 +9317,6 @@ defmodule Openflow.Enums do
     _class, _reason -> 2
   end
 
-  def to_atom(0x4, :nicira_ext_action) do
-    nicira_ext_action_to_atom(0x4)
-  catch
-    _class, _reason -> 4
-  end
-
-  def to_atom(0x5, :nicira_ext_action) do
-    nicira_ext_action_to_atom(0x5)
-  catch
-    _class, _reason -> 5
-  end
-
   def to_atom(0x6, :nicira_ext_action) do
     nicira_ext_action_to_atom(0x6)
   catch
@@ -9401,30 +9413,6 @@ defmodule Openflow.Enums do
     _class, _reason -> 22
   end
 
-  def to_atom(0x17, :nicira_ext_action) do
-    nicira_ext_action_to_atom(0x17)
-  catch
-    _class, _reason -> 23
-  end
-
-  def to_atom(0x18, :nicira_ext_action) do
-    nicira_ext_action_to_atom(0x18)
-  catch
-    _class, _reason -> 24
-  end
-
-  def to_atom(0x19, :nicira_ext_action) do
-    nicira_ext_action_to_atom(0x19)
-  catch
-    _class, _reason -> 25
-  end
-
-  def to_atom(0x1A, :nicira_ext_action) do
-    nicira_ext_action_to_atom(0x1A)
-  catch
-    _class, _reason -> 26
-  end
-
   def to_atom(0x1B, :nicira_ext_action) do
     nicira_ext_action_to_atom(0x1B)
   catch
@@ -9443,18 +9431,6 @@ defmodule Openflow.Enums do
     _class, _reason -> 29
   end
 
-  def to_atom(0x1E, :nicira_ext_action) do
-    nicira_ext_action_to_atom(0x1E)
-  catch
-    _class, _reason -> 30
-  end
-
-  def to_atom(0x1F, :nicira_ext_action) do
-    nicira_ext_action_to_atom(0x1F)
-  catch
-    _class, _reason -> 31
-  end
-
   def to_atom(0x20, :nicira_ext_action) do
     nicira_ext_action_to_atom(0x20)
   catch
@@ -10573,6 +10549,8 @@ defmodule Openflow.Enums do
   def bad_request_to_int(:bad_port), do: 0xB
   def bad_request_to_int(:bad_packet), do: 0xC
   def bad_request_to_int(:multipart_buffer_overflow), do: 0xD
+  def bad_request_to_int(:multipart_request_timeout), do: 0xE
+  def bad_request_to_int(:multipart_reply_timeout), do: 0xF
   def bad_request_to_int(:nxm_invalid), do: 0x100
   def bad_request_to_int(:nxm_bad_type), do: 0x101
   def bad_request_to_int(:must_be_zero), do: 0x203
@@ -10596,6 +10574,8 @@ defmodule Openflow.Enums do
   def bad_request_to_atom(0xB), do: :bad_port
   def bad_request_to_atom(0xC), do: :bad_packet
   def bad_request_to_atom(0xD), do: :multipart_buffer_overflow
+  def bad_request_to_atom(0xE), do: :multipart_request_timeout
+  def bad_request_to_atom(0xF), do: :multipart_reply_timeout
   def bad_request_to_atom(0x100), do: :nxm_invalid
   def bad_request_to_atom(0x101), do: :nxm_bad_type
   def bad_request_to_atom(0x203), do: :must_be_zero
@@ -10622,7 +10602,7 @@ defmodule Openflow.Enums do
   def bad_action_to_int(:bad_set_len), do: 0xE
   def bad_action_to_int(:bad_set_argument), do: 0xF
   def bad_action_to_int(:must_be_zero), do: 0x100
-  def bad_action_to_int(:conntrack_not_supported), do: 0x109
+  def bad_action_to_int(:conntrack_datapath_support), do: 0x109
   def bad_action_to_int(:bad_conjunction), do: 0x20E
   def bad_action_to_int(_), do: throw(:bad_enum)
   def bad_action_to_atom(0x0), do: :bad_type
@@ -10642,7 +10622,7 @@ defmodule Openflow.Enums do
   def bad_action_to_atom(0xE), do: :bad_set_len
   def bad_action_to_atom(0xF), do: :bad_set_argument
   def bad_action_to_atom(0x100), do: :must_be_zero
-  def bad_action_to_atom(0x109), do: :conntrack_not_supported
+  def bad_action_to_atom(0x109), do: :conntrack_datapath_support
   def bad_action_to_atom(0x20E), do: :bad_conjunction
   def bad_action_to_atom(_), do: throw(:bad_enum)
   def bad_instruction_to_int(:unknown_instruction), do: 0x0
@@ -10654,6 +10634,7 @@ defmodule Openflow.Enums do
   def bad_instruction_to_int(:bad_exp_type), do: 0x6
   def bad_instruction_to_int(:bad_len), do: 0x7
   def bad_instruction_to_int(:eperm), do: 0x8
+  def bad_instruction_to_int(:dup_inst), do: 0x100
   def bad_instruction_to_int(_), do: throw(:bad_enum)
   def bad_instruction_to_atom(0x0), do: :unknown_instruction
   def bad_instruction_to_atom(0x1), do: :unsupported_instruction
@@ -10664,6 +10645,7 @@ defmodule Openflow.Enums do
   def bad_instruction_to_atom(0x6), do: :bad_exp_type
   def bad_instruction_to_atom(0x7), do: :bad_len
   def bad_instruction_to_atom(0x8), do: :eperm
+  def bad_instruction_to_atom(0x100), do: :dup_inst
   def bad_instruction_to_atom(_), do: throw(:bad_enum)
   def bad_match_to_int(:bad_type), do: 0x0
   def bad_match_to_int(:bad_len), do: 0x1
@@ -10677,6 +10659,7 @@ defmodule Openflow.Enums do
   def bad_match_to_int(:bad_prereq), do: 0x9
   def bad_match_to_int(:dup_field), do: 0xA
   def bad_match_to_int(:eperm), do: 0xB
+  def bad_match_to_int(:conntrack_datapath_support), do: 0x108
   def bad_match_to_int(_), do: throw(:bad_enum)
   def bad_match_to_atom(0x0), do: :bad_type
   def bad_match_to_atom(0x1), do: :bad_len
@@ -10690,6 +10673,7 @@ defmodule Openflow.Enums do
   def bad_match_to_atom(0x9), do: :bad_prereq
   def bad_match_to_atom(0xA), do: :dup_field
   def bad_match_to_atom(0xB), do: :eperm
+  def bad_match_to_atom(0x108), do: :conntrack_datapath_support
   def bad_match_to_atom(_), do: throw(:bad_enum)
   def flow_mod_failed_to_int(:unknown), do: 0x0
   def flow_mod_failed_to_int(:table_full), do: 0x1
@@ -10724,6 +10708,8 @@ defmodule Openflow.Enums do
   def group_mod_failed_to_int(:bad_bucket), do: 0xC
   def group_mod_failed_to_int(:bad_watch), do: 0xD
   def group_mod_failed_to_int(:eperm), do: 0xE
+  def group_mod_failed_to_int(:unknown_bucket), do: 0xF
+  def group_mod_failed_to_int(:bucket_exists), do: 0x10
   def group_mod_failed_to_int(_), do: throw(:bad_enum)
   def group_mod_failed_to_atom(0x0), do: :group_exists
   def group_mod_failed_to_atom(0x1), do: :invalid_group
@@ -10740,6 +10726,8 @@ defmodule Openflow.Enums do
   def group_mod_failed_to_atom(0xC), do: :bad_bucket
   def group_mod_failed_to_atom(0xD), do: :bad_watch
   def group_mod_failed_to_atom(0xE), do: :eperm
+  def group_mod_failed_to_atom(0xF), do: :unknown_bucket
+  def group_mod_failed_to_atom(0x10), do: :bucket_exists
   def group_mod_failed_to_atom(_), do: throw(:bad_enum)
   def port_mod_failed_to_int(:bad_port), do: 0x0
   def port_mod_failed_to_int(:bad_hw_addr), do: 0x1
@@ -11755,8 +11743,6 @@ defmodule Openflow.Enums do
   def onf_ext_action_to_atom(_), do: throw(:bad_enum)
   def nicira_ext_action_to_int(Openflow.Action.NxResubmit), do: 0x1
   def nicira_ext_action_to_int(Openflow.Action.NxSetTunnel), do: 0x2
-  def nicira_ext_action_to_int(Openflow.Action.NxSetQueue), do: 0x4
-  def nicira_ext_action_to_int(Openflow.Action.NxPopQueue), do: 0x5
   def nicira_ext_action_to_int(Openflow.Action.NxRegMove), do: 0x6
   def nicira_ext_action_to_int(Openflow.Action.NxRegLoad), do: 0x7
   def nicira_ext_action_to_int(Openflow.Action.NxNote), do: 0x8
@@ -11773,15 +11759,9 @@ defmodule Openflow.Enums do
   def nicira_ext_action_to_int(Openflow.Action.NxController), do: 0x14
   def nicira_ext_action_to_int(Openflow.Action.NxDecTtlCntIds), do: 0x15
   def nicira_ext_action_to_int(Openflow.Action.NxWriteMetadata), do: 0x16
-  def nicira_ext_action_to_int(Openflow.Action.NxPushMpls), do: 0x17
-  def nicira_ext_action_to_int(Openflow.Action.NxPopMpls), do: 0x18
-  def nicira_ext_action_to_int(Openflow.Action.NxSetMplsTtl), do: 0x19
-  def nicira_ext_action_to_int(Openflow.Action.NxDecMplsTtl), do: 0x1A
   def nicira_ext_action_to_int(Openflow.Action.NxStackPush), do: 0x1B
   def nicira_ext_action_to_int(Openflow.Action.NxStackPop), do: 0x1C
   def nicira_ext_action_to_int(Openflow.Action.NxSample), do: 0x1D
-  def nicira_ext_action_to_int(Openflow.Action.NxSetMplsLabel), do: 0x1E
-  def nicira_ext_action_to_int(Openflow.Action.NxSetMplsTc), do: 0x1F
   def nicira_ext_action_to_int(Openflow.Action.NxOutputReg2), do: 0x20
   def nicira_ext_action_to_int(Openflow.Action.NxRegLoad2), do: 0x21
   def nicira_ext_action_to_int(Openflow.Action.NxConjunction), do: 0x22
@@ -11802,8 +11782,6 @@ defmodule Openflow.Enums do
   def nicira_ext_action_to_int(_), do: throw(:bad_enum)
   def nicira_ext_action_to_atom(0x1), do: Openflow.Action.NxResubmit
   def nicira_ext_action_to_atom(0x2), do: Openflow.Action.NxSetTunnel
-  def nicira_ext_action_to_atom(0x4), do: Openflow.Action.NxSetQueue
-  def nicira_ext_action_to_atom(0x5), do: Openflow.Action.NxPopQueue
   def nicira_ext_action_to_atom(0x6), do: Openflow.Action.NxRegMove
   def nicira_ext_action_to_atom(0x7), do: Openflow.Action.NxRegLoad
   def nicira_ext_action_to_atom(0x8), do: Openflow.Action.NxNote
@@ -11820,15 +11798,9 @@ defmodule Openflow.Enums do
   def nicira_ext_action_to_atom(0x14), do: Openflow.Action.NxController
   def nicira_ext_action_to_atom(0x15), do: Openflow.Action.NxDecTtlCntIds
   def nicira_ext_action_to_atom(0x16), do: Openflow.Action.NxWriteMetadata
-  def nicira_ext_action_to_atom(0x17), do: Openflow.Action.NxPushMpls
-  def nicira_ext_action_to_atom(0x18), do: Openflow.Action.NxPopMpls
-  def nicira_ext_action_to_atom(0x19), do: Openflow.Action.NxSetMplsTtl
-  def nicira_ext_action_to_atom(0x1A), do: Openflow.Action.NxDecMplsTtl
   def nicira_ext_action_to_atom(0x1B), do: Openflow.Action.NxStackPush
   def nicira_ext_action_to_atom(0x1C), do: Openflow.Action.NxStackPop
   def nicira_ext_action_to_atom(0x1D), do: Openflow.Action.NxSample
-  def nicira_ext_action_to_atom(0x1E), do: Openflow.Action.NxSetMplsLabel
-  def nicira_ext_action_to_atom(0x1F), do: Openflow.Action.NxSetMplsTc
   def nicira_ext_action_to_atom(0x20), do: Openflow.Action.NxOutputReg2
   def nicira_ext_action_to_atom(0x21), do: Openflow.Action.NxRegLoad2
   def nicira_ext_action_to_atom(0x22), do: Openflow.Action.NxConjunction
@@ -13000,6 +12972,8 @@ defmodule Openflow.Enums do
       bad_port: 11,
       bad_packet: 12,
       multipart_buffer_overflow: 13,
+      multipart_request_timeout: 14,
+      multipart_reply_timeout: 15,
       nxm_invalid: 256,
       nxm_bad_type: 257,
       must_be_zero: 515,
@@ -13029,7 +13003,7 @@ defmodule Openflow.Enums do
       bad_set_len: 14,
       bad_set_argument: 15,
       must_be_zero: 256,
-      conntrack_not_supported: 265,
+      conntrack_datapath_support: 265,
       bad_conjunction: 526
     ]
 
@@ -13043,7 +13017,8 @@ defmodule Openflow.Enums do
       bad_experimeter: 5,
       bad_exp_type: 6,
       bad_len: 7,
-      eperm: 8
+      eperm: 8,
+      dup_inst: 256
     ]
 
   defp enum_of(:bad_match),
@@ -13059,7 +13034,8 @@ defmodule Openflow.Enums do
       bad_mask: 8,
       bad_prereq: 9,
       dup_field: 10,
-      eperm: 11
+      eperm: 11,
+      conntrack_datapath_support: 264
     ]
 
   defp enum_of(:flow_mod_failed),
@@ -13090,7 +13066,9 @@ defmodule Openflow.Enums do
       bad_command: 11,
       bad_bucket: 12,
       bad_watch: 13,
-      eperm: 14
+      eperm: 14,
+      unknown_bucket: 15,
+      bucket_exists: 16
     ]
 
   defp enum_of(:port_mod_failed),
@@ -13577,8 +13555,6 @@ defmodule Openflow.Enums do
     do: [
       {Openflow.Action.NxResubmit, 1},
       {Openflow.Action.NxSetTunnel, 2},
-      {Openflow.Action.NxSetQueue, 4},
-      {Openflow.Action.NxPopQueue, 5},
       {Openflow.Action.NxRegMove, 6},
       {Openflow.Action.NxRegLoad, 7},
       {Openflow.Action.NxNote, 8},
@@ -13595,15 +13571,9 @@ defmodule Openflow.Enums do
       {Openflow.Action.NxController, 20},
       {Openflow.Action.NxDecTtlCntIds, 21},
       {Openflow.Action.NxWriteMetadata, 22},
-      {Openflow.Action.NxPushMpls, 23},
-      {Openflow.Action.NxPopMpls, 24},
-      {Openflow.Action.NxSetMplsTtl, 25},
-      {Openflow.Action.NxDecMplsTtl, 26},
       {Openflow.Action.NxStackPush, 27},
       {Openflow.Action.NxStackPop, 28},
       {Openflow.Action.NxSample, 29},
-      {Openflow.Action.NxSetMplsLabel, 30},
-      {Openflow.Action.NxSetMplsTc, 31},
       {Openflow.Action.NxOutputReg2, 32},
       {Openflow.Action.NxRegLoad2, 33},
       {Openflow.Action.NxConjunction, 34},
diff --git a/lib/openflow/features.ex b/lib/openflow/features.ex
deleted file mode 100644
index 43b26b8..0000000
--- a/lib/openflow/features.ex
+++ /dev/null
@@ -1,2 +0,0 @@
-defmodule Openflow.Features do
-end
diff --git a/lib/openflow/features/reply.ex b/lib/openflow/features/reply.ex
index e104ba8..5d3df0a 100644
--- a/lib/openflow/features/reply.ex
+++ b/lib/openflow/features/reply.ex
@@ -11,11 +11,38 @@ defmodule Openflow.Features.Reply do
 
   alias __MODULE__
 
+  @type t :: %Reply{
+          version: 4,
+          xid: 0..0xFFFFFFFF,
+          datapath_id: String.t() | nil,
+          n_buffers: 0..0xFFFFFFFF,
+          n_tables: 0..0xFF,
+          aux_id: 0..0xFF,
+          capabilities: [
+            :flow_stats
+            | :table_stats
+            | :port_stats
+            | :group_stats
+            | :ip_reasm
+            | :queue_stats
+            | :arp_match_ip
+            | :port_blocked
+          ]
+        }
+
+  @spec ofp_type :: 6
   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
+  @spec read(<<_::192>>) :: t()
+  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)
 
@@ -28,6 +55,7 @@ defmodule Openflow.Features.Reply do
     }
   end
 
+  @spec to_binary(t()) :: <<_::192>>
   def to_binary(%Reply{
         datapath_id: datapath_id,
         n_buffers: n_buf,
diff --git a/lib/openflow/features/request.ex b/lib/openflow/features/request.ex
index 8fb5f4e..8f8f057 100644
--- a/lib/openflow/features/request.ex
+++ b/lib/openflow/features/request.ex
@@ -10,17 +10,22 @@ defmodule Openflow.Features.Request do
 
   alias __MODULE__
 
+  @type t :: %Request{
+          version: 4,
+          xid: 0..0xFFFFFFFF,
+          datapath_id: String.t() | nil,
+          aux_id: 0..0xFFFF | nil
+        }
+
+  @spec ofp_type :: 5
   def ofp_type, do: 5
 
-  def new(xid \\ 0) do
-    %Request{xid: xid}
-  end
+  @spec new(0..0xFFFF) :: t()
+  def new(xid \\ 0), do: %Request{xid: xid}
 
-  def read(_) do
-    %Request{}
-  end
+  @spec read(any()) :: t()
+  def read(_), do: %Request{}
 
-  def to_binary(%Request{}) do
-    <<>>
-  end
+  @spec to_binary(t()) :: <<>>
+  def to_binary(%Request{}), do: <<>>
 end
diff --git a/mix.exs b/mix.exs
index 19ea0f6..1da9d4a 100644
--- a/mix.exs
+++ b/mix.exs
@@ -7,10 +7,12 @@ defmodule Tres.Mixfile do
       version: "0.1.0",
       elixir: "~> 1.8",
       start_permanent: Mix.env() == :prod,
-      escript: [main_module: Openflow.EnumGen, name: :enum_gen, path: "bin/enum_gen"],
       compilers: [:erlang] ++ Mix.compilers(),
       deps: deps(),
-      aliases: [test: "test --no-start", compile: ["escript.build"]],
+      aliases: [
+        test: "test --no-start",
+        compile: ["run priv/openflow_enum_gen.exs"]
+      ],
       docs: docs(),
       test_coverage: [tool: ExCoveralls],
       preferred_cli_env: [
diff --git a/priv/openflow_enum_gen.exs b/priv/openflow_enum_gen.exs
new file mode 100644
index 0000000..7666f22
--- /dev/null
+++ b/priv/openflow_enum_gen.exs
@@ -0,0 +1,1150 @@
+import Bitwise
+
+enums = [
+  openflow_codec: [
+    {Openflow.Hello, 0},
+    {Openflow.ErrorMsg, 1},
+    {Openflow.Echo.Request, 2},
+    {Openflow.Echo.Reply, 3},
+    {Openflow.Experimenter, 4},
+    {Openflow.Features.Request, 5},
+    {Openflow.Features.Reply, 6},
+    {Openflow.GetConfig.Request, 7},
+    {Openflow.GetConfig.Reply, 8},
+    {Openflow.SetConfig, 9},
+    {Openflow.PacketIn, 10},
+    {Openflow.FlowRemoved, 11},
+    {Openflow.PortStatus, 12},
+    {Openflow.PacketOut, 13},
+    {Openflow.FlowMod, 14},
+    {Openflow.GroupMod, 15},
+    {Openflow.PortMod, 16},
+    {Openflow.TableMod, 17},
+    {Openflow.Multipart.Request, 18},
+    {Openflow.Multipart.Reply, 19},
+    {Openflow.Barrier.Request, 20},
+    {Openflow.Barrier.Reply, 21},
+    {Openflow.Role.Request, 24},
+    {Openflow.Role.Reply, 25},
+    {Openflow.GetAsync.Request, 26},
+    {Openflow.GetAsync.Reply, 27},
+    {Openflow.SetAsync, 28},
+    {Openflow.MeterMod, 29}
+  ],
+  experimenter_id: [
+    nicira_ext_message: 0x00002320,
+    onf_ext_message: 0x4F4E4600
+  ],
+  nicira_ext_message: [
+    # {Openflow.NxRole.Request,        10}, /* Openflow 1.3 support role request/reply */
+    # {Openflow.NxRole.Reply,          11},
+    # {Openflow.NxSetFlowFormat,       12}, /* No special reason for implement this struct codec. */
+    # {Openflow.NxFlowMod,             13}, /* Prefer use ofp_flow_mod to nx_flow_mod */
+    # {Openflow.NxFlowRemoved,         14}, /* Prefer use ofp_flow_removed to nx_flow_removed */
+    # {Openflow.NxSetFlowModTableId,   15}, /* OpenFlow 1.3 support multiple flow table. */
+    {Openflow.NxSetPacketInFormat, 16},
+    # {Openflow.NxPacketIn,            17}, /* No special reason for implement this struct codec. */
+    # {Openflow.NxFlowAge,             18}, /* No special reason for implement this struct codec. */
+    # {Openflow.NxSetAsyncConfig,      19}, /* Openflow 1.3 support async config. */
+    {Openflow.NxSetControllerId, 20},
+    {Openflow.NxFlowMonitor.Cancel, 21},
+    {Openflow.NxFlowMonitor.Paused, 22},
+    {Openflow.NxFlowMonitor.Resumed, 23},
+    {Openflow.NxTLVTableMod, 24},
+    {Openflow.NxTLVTable.Request, 25},
+    {Openflow.NxTLVTable.Reply, 26},
+    {Openflow.NxSetAsyncConfig2, 27},
+    {Openflow.NxResume, 28},
+    {Openflow.NxCtFlushZone, 29},
+    {Openflow.NxPacketIn2, 30}
+  ],
+  onf_ext_message: [
+    {Openflow.OnfBundleControl, 2300},
+    {Openflow.OnfBundleAddMessage, 2301}
+  ],
+  multipart_request_flags: [
+    more: 1 <<< 0
+  ],
+  multipart_reply_flags: [
+    more: 1 <<< 0
+  ],
+  multipart_request_codec: [
+    {Openflow.Multipart.Desc.Request, 0},
+    {Openflow.Multipart.Flow.Request, 1},
+    {Openflow.Multipart.Aggregate.Request, 2},
+    {Openflow.Multipart.Table.Request, 3},
+    {Openflow.Multipart.PortStats.Request, 4},
+    {Openflow.Multipart.Queue.Request, 5},
+    {Openflow.Multipart.Group.Request, 6},
+    {Openflow.Multipart.GroupDesc.Request, 7},
+    {Openflow.Multipart.GroupFeatures.Request, 8},
+    {Openflow.Multipart.Meter.Request, 9},
+    {Openflow.Multipart.MeterConfig.Request, 10},
+    {Openflow.Multipart.MeterFeatures.Request, 11},
+    {Openflow.Multipart.TableFeatures.Request, 12},
+    {Openflow.Multipart.PortDesc.Request, 13},
+    {Openflow.Multipart.Experimenter.Request, 0xFFFF}
+  ],
+  multipart_reply_codec: [
+    {Openflow.Multipart.Desc.Reply, 0},
+    {Openflow.Multipart.Flow.Reply, 1},
+    {Openflow.Multipart.Aggregate.Reply, 2},
+    {Openflow.Multipart.Table.Reply, 3},
+    {Openflow.Multipart.PortStats.Reply, 4},
+    {Openflow.Multipart.Queue.Reply, 5},
+    {Openflow.Multipart.Group.Reply, 6},
+    {Openflow.Multipart.GroupDesc.Reply, 7},
+    {Openflow.Multipart.GroupFeatures.Reply, 8},
+    {Openflow.Multipart.Meter.Reply, 9},
+    {Openflow.Multipart.MeterConfig.Reply, 10},
+    {Openflow.Multipart.MeterFeatures.Reply, 11},
+    {Openflow.Multipart.TableFeatures.Reply, 12},
+    {Openflow.Multipart.PortDesc.Reply, 13},
+    {Openflow.Multipart.Experimenter.Reply, 0xFFFF}
+  ],
+  nicira_ext_stats: [
+    {Openflow.Multipart.NxFlow, 0},
+    {Openflow.Multipart.NxAggregate, 1},
+    {Openflow.Multipart.NxFlowMonitor, 2},
+    {Openflow.Multipart.NxIPFIXBridge, 3},
+    {Openflow.Multipart.NxIPFIXFlow, 4}
+  ],
+  hello_elem: [
+    versionbitmap: 1
+  ],
+  error_type: [
+    hello_failed: 0,
+    bad_request: 1,
+    bad_action: 2,
+    bad_instruction: 3,
+    bad_match: 4,
+    flow_mod_failed: 5,
+    group_mod_failed: 6,
+    port_mod_failed: 7,
+    table_mod_failed: 8,
+    queue_op_failed: 9,
+    switch_config_failed: 10,
+    role_request_failed: 11,
+    meter_mod_failed: 12,
+    table_features_failed: 13,
+    experimenter: 0xFFFF
+  ],
+  hello_failed: [
+    inconpatible: 0,
+    eperm: 1
+  ],
+  bad_request: [
+    bad_version: 0,
+    bad_type: 1,
+    bad_multipart: 2,
+    bad_experimeter: 3,
+    bad_exp_type: 4,
+    eperm: 5,
+    bad_len: 6,
+    buffer_empty: 7,
+    buffer_unknown: 8,
+    bad_table_id: 9,
+    is_slave: 10,
+    bad_port: 11,
+    bad_packet: 12,
+    multipart_buffer_overflow: 13,
+    multipart_request_timeout: 14,
+    multipart_reply_timeout: 15,
+    nxm_invalid: 256,
+    nxm_bad_type: 257,
+    must_be_zero: 515,
+    bad_reason: 516,
+    flow_monitor_bad_event: 520,
+    undecodable_error: 521,
+    resume_not_supported: 533,
+    resume_stale: 534
+  ],
+  bad_action: [
+    bad_type: 0,
+    bad_len: 1,
+    bad_experimeter: 2,
+    bad_exp_type: 3,
+    bad_out_port: 4,
+    bad_argument: 5,
+    eperm: 6,
+    too_many: 7,
+    bad_queue: 8,
+    bad_out_group: 9,
+    match_inconsistent: 10,
+    unsupported_order: 11,
+    bad_tag: 12,
+    bad_set_type: 13,
+    bad_set_len: 14,
+    bad_set_argument: 15,
+    must_be_zero: 256,
+    conntrack_datapath_support: 265,
+    bad_conjunction: 526
+  ],
+  bad_instruction: [
+    unknown_instruction: 0,
+    unsupported_instruction: 1,
+    bad_table_id: 2,
+    unsupported_metadata: 3,
+    unsupported_metadata_mask: 4,
+    bad_experimeter: 5,
+    bad_exp_type: 6,
+    bad_len: 7,
+    eperm: 8,
+    dup_inst: 256
+  ],
+  bad_match: [
+    bad_type: 0,
+    bad_len: 1,
+    bad_tag: 2,
+    bad_dl_addr_mask: 3,
+    bad_nw_addr_mask: 4,
+    bad_wildcards: 5,
+    bad_field: 6,
+    bad_value: 7,
+    bad_mask: 8,
+    bad_prereq: 9,
+    dup_field: 10,
+    eperm: 11,
+    conntrack_datapath_support: 264
+  ],
+  flow_mod_failed: [
+    unknown: 0,
+    table_full: 1,
+    bad_table_id: 2,
+    overlap: 3,
+    eperm: 4,
+    bad_timeout: 5,
+    bad_command: 6,
+    bad_flags: 7
+  ],
+  group_mod_failed: [
+    group_exists: 0,
+    invalid_group: 1,
+    weight_unsupported: 2,
+    out_of_groups: 3,
+    ouf_of_buckets: 4,
+    chaining_unsupported: 5,
+    watch_unsupported: 6,
+    loop: 7,
+    unknown_group: 8,
+    chained_group: 9,
+    bad_type: 10,
+    bad_command: 11,
+    bad_bucket: 12,
+    bad_watch: 13,
+    eperm: 14,
+    unknown_bucket: 15,
+    bucket_exists: 16
+  ],
+  port_mod_failed: [
+    bad_port: 0,
+    bad_hw_addr: 1,
+    bad_config: 2,
+    bad_advertise: 3,
+    eperm: 4
+  ],
+  table_mod_failed: [
+    bad_table: 0,
+    bad_config: 1,
+    eperm: 2
+  ],
+  queue_op_failed: [
+    bad_port: 0,
+    bad_queue: 1,
+    eperm: 2
+  ],
+  switch_config_failed: [
+    bad_flags: 0,
+    bad_len: 1,
+    eperm: 2
+  ],
+  role_request_failed: [
+    stale: 0,
+    unsup: 1,
+    bad_role: 2
+  ],
+  meter_mod_failed: [
+    unknown: 0,
+    meter_exists: 1,
+    invalid_meter: 2,
+    unknown_meter: 3,
+    bad_command: 4,
+    bad_flags: 5,
+    bad_rate: 6,
+    bad_burst: 7,
+    bad_band: 8,
+    bad_band_value: 9,
+    out_of_meters: 10,
+    out_of_bands: 11
+  ],
+  table_features_failed: [
+    bad_table: 0,
+    bad_metadata: 1,
+    bad_type: 2,
+    bad_len: 3,
+    bad_argument: 4,
+    eperm: 5
+  ],
+  switch_capabilities: [
+    flow_stats: 1 <<< 0,
+    table_stats: 1 <<< 1,
+    port_stats: 1 <<< 2,
+    group_stats: 1 <<< 3,
+    ip_reasm: 1 <<< 5,
+    queue_stats: 1 <<< 6,
+    arp_match_ip: 1 <<< 7,
+    port_blocked: 1 <<< 8
+  ],
+  config_flags: [
+    drop: 1 <<< 0,
+    reasm: 1 <<< 1
+  ],
+  controller_max_len: [
+    max: 0xFFE5,
+    no_buffer: 0xFFFF
+  ],
+  experimenter_oxm_vendors: [
+    nicira_ext_match: 0x00002320,
+    hp_ext_match: 0x00002428,
+    onf_ext_match: 0x4F4E4600
+  ],
+  match_type: [
+    standard: 0,
+    oxm: 1
+  ],
+  oxm_class: [
+    nxm_0: 0x0000,
+    nxm_1: 0x0001,
+    openflow_basic: 0x8000,
+    packet_register: 0x8001,
+    experimenter: 0xFFFF
+  ],
+  nxm_0: [
+    nx_in_port: 0,
+    nx_eth_dst: 1,
+    nx_eth_src: 2,
+    nx_eth_type: 3,
+    nx_vlan_tci: 4,
+    nx_ip_tos: 5,
+    nx_ip_proto: 6,
+    nx_ipv4_src: 7,
+    nx_ipv4_dst: 8,
+    nx_tcp_src: 9,
+    nx_tcp_dst: 10,
+    nx_udp_src: 11,
+    nx_udp_dst: 12,
+    nx_icmpv4_type: 13,
+    nx_icmpv4_code: 14,
+    nx_arp_op: 15,
+    nx_arp_spa: 16,
+    nx_arp_tpa: 17,
+    nx_tcp_flags: 34
+  ],
+  nxm_1: [
+    reg0: 0,
+    reg1: 1,
+    reg2: 2,
+    reg3: 3,
+    reg4: 4,
+    reg5: 5,
+    reg6: 6,
+    reg7: 7,
+    reg8: 8,
+    reg9: 9,
+    reg10: 10,
+    reg11: 11,
+    reg12: 12,
+    reg13: 13,
+    reg14: 14,
+    reg15: 15,
+    tun_id: 16,
+    nx_arp_sha: 17,
+    nx_arp_tha: 18,
+    nx_ipv6_src: 19,
+    nx_ipv6_dst: 20,
+    nx_icmpv6_type: 21,
+    nx_icmpv6_code: 22,
+    nx_ipv6_nd_target: 23,
+    nx_ipv6_nd_sll: 24,
+    nx_ipv6_nd_tll: 25,
+    nx_ip_frag: 26,
+    nx_ipv6_label: 27,
+    nx_ip_ecn: 28,
+    nx_ip_ttl: 29,
+    nx_mpls_ttl: 30,
+    tun_src: 31,
+    tun_dst: 32,
+    pkt_mark: 33,
+    dp_hash: 35,
+    recirc_id: 36,
+    conj_id: 37,
+    tun_gbp_id: 38,
+    tun_gbp_flags: 39,
+    tun_metadata0: 40,
+    tun_metadata1: 41,
+    tun_metadata2: 42,
+    tun_metadata3: 43,
+    tun_metadata4: 44,
+    tun_metadata5: 45,
+    tun_metadata6: 46,
+    tun_metadata7: 47,
+    tun_metadata8: 48,
+    tun_metadata9: 49,
+    tun_metadata10: 50,
+    tun_metadata11: 51,
+    tun_metadata12: 52,
+    tun_metadata13: 53,
+    tun_metadata14: 54,
+    tun_metadata15: 55,
+    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
+  ],
+  openflow_basic: [
+    in_port: 0,
+    in_phy_port: 1,
+    metadata: 2,
+    eth_dst: 3,
+    eth_src: 4,
+    eth_type: 5,
+    vlan_vid: 6,
+    vlan_pcp: 7,
+    ip_dscp: 8,
+    ip_ecn: 9,
+    ip_proto: 10,
+    ipv4_src: 11,
+    ipv4_dst: 12,
+    tcp_src: 13,
+    tcp_dst: 14,
+    udp_src: 15,
+    udp_dst: 16,
+    sctp_src: 17,
+    sctp_dst: 18,
+    icmpv4_type: 19,
+    icmpv4_code: 20,
+    arp_op: 21,
+    arp_spa: 22,
+    arp_tpa: 23,
+    arp_sha: 24,
+    arp_tha: 25,
+    ipv6_src: 26,
+    ipv6_dst: 27,
+    ipv6_flabel: 28,
+    icmpv6_type: 29,
+    icmpv6_code: 30,
+    ipv6_nd_target: 31,
+    ipv6_nd_sll: 32,
+    ipv6_nd_tll: 33,
+    mpls_label: 34,
+    mpls_tc: 35,
+    mpls_bos: 36,
+    pbb_isid: 37,
+    tunnel_id: 38,
+    ipv6_exthdr: 39,
+
+    # Lagopus extended match fields
+    pbb_uca: 41,
+    packet_type: 42,
+    gre_flags: 43,
+    gre_ver: 44,
+    gre_protocol: 45,
+    gre_key: 46,
+    gre_seqnum: 47,
+    lisp_flags: 48,
+    lisp_nonce: 49,
+    lisp_id: 50,
+    vxlan_flags: 51,
+    vxlan_vni: 52,
+    mpls_data_first_nibble: 53,
+    mpls_ach_version: 54,
+    mpls_ach_channel: 55,
+    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
+  ],
+  vlan_id: [
+    present: 0x1000,
+    none: 0x0000
+  ],
+  ipv6exthdr_flags: [
+    nonext: 1 <<< 0,
+    esp: 1 <<< 1,
+    auth: 1 <<< 2,
+    dest: 1 <<< 3,
+    frag: 1 <<< 4,
+    router: 1 <<< 5,
+    hop: 1 <<< 6,
+    unrep: 1 <<< 7,
+    unseq: 1 <<< 8
+  ],
+  tcp_flags: [
+    fin: 1 <<< 0,
+    syn: 1 <<< 1,
+    rst: 1 <<< 2,
+    psh: 1 <<< 3,
+    ack: 1 <<< 4,
+    urg: 1 <<< 5,
+    ece: 1 <<< 6,
+    cwr: 1 <<< 7,
+    ns: 1 <<< 8
+  ],
+  ct_state_flags: [
+    # Beginning of a new connection.
+    new: 1 <<< 0,
+    # Part of an existing connection.
+    est: 1 <<< 1,
+    # Related to an established connection.
+    rel: 1 <<< 2,
+    # Flow is in the reply direction.
+    rep: 1 <<< 3,
+    # Could not track connection.
+    inv: 1 <<< 4,
+    # Conntrack has occurred.
+    trk: 1 <<< 5,
+    # Packet's source address/port was mangled by NAT.
+    snat: 1 <<< 6,
+    # Packet's destination address/port was mangled by NAT.
+    dnat: 1 <<< 7
+  ],
+  packet_register: [
+    xreg0: 0,
+    xreg1: 1,
+    xreg2: 2,
+    xreg3: 3,
+    xreg4: 4,
+    xreg5: 5,
+    xreg6: 6,
+    xreg7: 7
+  ],
+  nicira_ext_match: [
+    nsh_flags: 1,
+    nsh_mdtype: 2,
+    nsh_np: 3,
+    nsh_spi: 4,
+    nsh_si: 5,
+    nsh_c1: 6,
+    nsh_c2: 7,
+    nsh_c3: 8,
+    nsh_c4: 9
+  ],
+  hp_ext_match: [
+    hp_udp_src_port_range: 0,
+    hp_udp_dst_port_range: 1,
+    hp_tcp_src_port_range: 2,
+    hp_tcp_dst_port_range: 3,
+    hp_tcp_flags: 4,
+    hp_custom_1: 5,
+    hp_custom_2: 6,
+    hp_custom_3: 7,
+    hp_custom_4: 8
+  ],
+  hp_custom_match_type: [
+    l2_start: 1,
+    l3_start: 2,
+    l4_start: 3
+  ],
+  onf_ext_match: [
+    onf_tcp_flags: 42,
+    onf_actset_output: 43,
+    onf_pbb_uca: 2560
+  ],
+  buffer_id: [
+    no_buffer: 0xFFFFFFFF
+  ],
+  port_config: [
+    port_down: 1 <<< 0,
+    no_receive: 1 <<< 2,
+    no_forward: 1 <<< 5,
+    no_packet_in: 1 <<< 6
+  ],
+  port_state: [
+    link_down: 1 <<< 0,
+    blocked: 1 <<< 1,
+    live: 1 <<< 2
+  ],
+  port_features: [
+    {:"10mb_hd", 1 <<< 0},
+    {:"10mb_fd", 1 <<< 1},
+    {:"100mb_hd", 1 <<< 2},
+    {:"100mb_fd", 1 <<< 3},
+    {:"1gb_hd", 1 <<< 4},
+    {:"1gb_fd", 1 <<< 5},
+    {:"10gb_fd", 1 <<< 6},
+    {:"40gb_fd", 1 <<< 7},
+    {:"100gb_fd", 1 <<< 8},
+    {:"1tb_fd", 1 <<< 9},
+    {:other, 1 <<< 10},
+    {:copper, 1 <<< 11},
+    {:fiber, 1 <<< 12},
+    {:autoneg, 1 <<< 13},
+    {:pause, 1 <<< 14},
+    {:pause_asym, 1 <<< 15}
+  ],
+  openflow10_port_no: [
+    max: 0xFF00,
+    in_port: 0xFFF8,
+    table: 0xFFF9,
+    normal: 0xFFFA,
+    flood: 0xFFFB,
+    all: 0xFFFC,
+    controller: 0xFFFD,
+    local: 0xFFFE,
+    none: 0xFFFF
+  ],
+  openflow13_port_no: [
+    max: 0xFFFFFF00,
+    in_port: 0xFFFFFFF8,
+    table: 0xFFFFFFF9,
+    normal: 0xFFFFFFFA,
+    flood: 0xFFFFFFFB,
+    all: 0xFFFFFFFC,
+    controller: 0xFFFFFFFD,
+    local: 0xFFFFFFFE,
+    any: 0xFFFFFFFF
+  ],
+  packet_in_reason: [
+    no_match: 0,
+    action: 1,
+    invalid_ttl: 2,
+    action_set: 3,
+    group: 4,
+    packet_out: 5
+  ],
+  flow_mod_command: [
+    add: 0,
+    modify: 1,
+    modify_strict: 2,
+    delete: 3,
+    delete_strict: 4
+  ],
+  flow_mod_flags: [
+    send_flow_rem: 1 <<< 0,
+    check_overlap: 1 <<< 1,
+    reset_counts: 1 <<< 2,
+    no_packet_counts: 1 <<< 3,
+    no_byte_counts: 1 <<< 4
+  ],
+  flow_removed_reason: [
+    idle_timeout: 0,
+    hard_timeout: 1,
+    delete: 2,
+    group_delete: 3,
+    meter_delete: 4,
+    eviction: 5
+  ],
+  port_reason: [
+    add: 0,
+    delete: 1,
+    modify: 2
+  ],
+  group_mod_command: [
+    add: 0,
+    modify: 1,
+    delete: 2
+  ],
+  group_type: [
+    all: 0,
+    select: 1,
+    indirect: 2,
+    fast_failover: 3
+  ],
+  group_id: [
+    max: 0xFFFFFF00,
+    all: 0xFFFFFFFC,
+    any: 0xFFFFFFFF
+  ],
+  group_capabilities: [
+    select_weight: 1 <<< 0,
+    select_liveness: 1 <<< 1,
+    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
+]
+]
+
+File.write(
+  "lib/openflow/enums.ex",
+  """
+  defmodule Openflow.Enums do
+  @moduledoc "auto generated code"\n
+  """,
+  [:binary]
+)
+
+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
+
+    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
+
+    File.write(
+      "lib/openflow/enums.ex",
+    """
+    def to_atom(_, :#{enum_name}) do
+    throw(:bad_enum)
+    end\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"
+
+    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
+    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
+
+  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
+
+  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/ofp_echo_test.exs b/test/ofp_echo_test.exs
index 5e21fed..75d2683 100644
--- a/test/ofp_echo_test.exs
+++ b/test/ofp_echo_test.exs
@@ -2,6 +2,54 @@ defmodule OfpEchoTest do
   use ExUnit.Case
   doctest Openflow
 
+  describe "Openflow.Echo.Request" do
+    test "with xid and data options" do
+      echo = Openflow.Echo.Request.new(xid: 1, data: "echo")
+
+      echo
+      |> Openflow.to_binary()
+      |> Openflow.read()
+      |> Kernel.elem(1)
+      |> Kernel.==(echo)
+      |> assert()
+    end
+
+    test "with data options" do
+      echo = Openflow.Echo.Request.new("echo")
+
+      echo
+      |> Openflow.to_binary()
+      |> Openflow.read()
+      |> Kernel.elem(1)
+      |> Kernel.==(echo)
+      |> assert()
+    end
+  end
+
+  describe "Openflow.Echo.Reply" do
+    test "with xid and data options" do
+      echo = Openflow.Echo.Reply.new(xid: 1, data: "echo")
+
+      echo
+      |> Openflow.to_binary()
+      |> Openflow.read()
+      |> Kernel.elem(1)
+      |> Kernel.==(echo)
+      |> assert()
+    end
+
+    test "with data options" do
+      echo = Openflow.Echo.Reply.new("echo")
+
+      echo
+      |> Openflow.to_binary()
+      |> Openflow.read()
+      |> Kernel.elem(1)
+      |> Kernel.==(echo)
+      |> assert()
+    end
+  end
+
   describe "Openflow.read/1" do
     test "with OFP_ECHO_REQUEST packet" do
       {:ok, %Openflow.Echo.Request{} = echo, ""} =
@@ -9,9 +57,11 @@ defmodule OfpEchoTest do
         |> File.read!()
         |> Openflow.read()
 
-      assert echo.version == 4
-      assert echo.xid == 0
-      assert echo.data == ""
+      expect = Openflow.Echo.Request.new()
+
+      assert echo.version == expect.version
+      assert echo.xid == expect.xid
+      assert echo.data == expect.data
     end
 
     test "with OFP_ECHO_REPLY packet" do
@@ -20,9 +70,11 @@ defmodule OfpEchoTest do
         |> File.read!()
         |> Openflow.read()
 
-      assert echo.version == 4
-      assert echo.xid == 0
-      assert echo.data == ""
+      expect = Openflow.Echo.Reply.new()
+
+      assert echo.version == expect.version
+      assert echo.xid == expect.xid
+      assert echo.data == expect.data
     end
   end
 
diff --git a/test/ofp_features_test.exs b/test/ofp_features_test.exs
index 5d38572..6cb9430 100644
--- a/test/ofp_features_test.exs
+++ b/test/ofp_features_test.exs
@@ -9,8 +9,10 @@ defmodule OfpFeaturesTest do
         |> File.read!()
         |> Openflow.read()
 
-      assert features.version == 4
-      assert features.xid == 0
+      expect = Openflow.Features.Request.new(0)
+
+      assert features.version == expect.version
+      assert features.xid == expect.xid
     end
 
     test "with OFP_FEATURES_REPLY packet" do