Add DecrementIpTtl action

features/open_flow13/decrement_ip_ttl.feature

@@ -0,0 +1,12 @@
+@open_flow13
+Feature: Pio::DecrementIpTtl
+
+  Scenario: new
+    When I try to create an OpenFlow action with:
+      """
+      Pio::DecrementIpTtl.new
+      """
+    Then it should finish successfully
+    And the action has the following fields and values:
+      | field       | value |
+      | action_type |    24 |

lib/pio/open_flow.rb

@@ -23,7 +23,7 @@ def self.switch_version(version)
        :QueueStats, :Error, :SetArpOperation, :SetArpSenderProtocolAddress,
        :SetArpSenderHardwareAddress, :NiciraRegMove, :SetMetadata,
        :NiciraRegLoad, :NiciraSendOutPort, :NiciraStackPush,
-       :NiciraStackPop].each do |each|
+       :NiciraStackPop, :DecrementIpTtl].each do |each|
         set_message_class_name each, version
         @version = version.to_s
       end

lib/pio/open_flow13.rb

@@ -15,6 +15,7 @@
 # Actions
 require 'pio/open_flow/nicira_resubmit'
 require 'pio/open_flow/nicira_resubmit_table'
+require 'pio/open_flow13/decrement_ip_ttl'
 require 'pio/open_flow13/nicira_reg_load'
 require 'pio/open_flow13/nicira_reg_move'
 require 'pio/open_flow13/nicira_send_out_port'

lib/pio/open_flow13/decrement_ip_ttl.rb

@@ -0,0 +1,15 @@
+require 'pio/open_flow/action'
+
+module Pio
+  module OpenFlow13
+    # Decrements IP TTL
+    class DecrementIpTtl < OpenFlow::Action
+      action_header action_type: 24, action_length: 8
+      string :padding, length: 4
+
+      def initialize
+        super({})
+      end
+    end
+  end
+end