Added support for openflow 1.5. (#13)

* Added package openflow15 which implements the Openflow 1.5 protocol
Marshal and Unmarshal functions.

* Added the unit test (openflow15_test.go) file to test the Marshal/
Unmarshal of every Openflow 1.5 message.

* Modified the README.md file to include support of Openflow 1.5.

* Updated the VERSION file.

Signed-off-by: Ashish Varma <[email protected]>

Author: ashish-varma

README.md

@@ -1,6 +1,6 @@
 # libOpenflow
 
-This library implements Openflow 1.3 protocol encapsulation and decapsulation.
+This library implements Openflow 1.3 and Openflow 1.5 protocol encapsulation and decapsulation.
 
 This repository is a fork of
 [contiv/libOpenflow](https://github.com/contiv/libOpenflow), used by Antrea, as

VERSION

@@ -1 +1 @@
-v0.7.1
+v0.8.0

common/header.go

@@ -8,6 +8,8 @@ import (
 	"sync/atomic"
 
 	"antrea.io/libOpenflow/util"
+
+	log "github.com/sirupsen/logrus"
 )
 
 var messageXid uint32 = 1
@@ -60,6 +62,8 @@ func (h *Header) UnmarshalBinary(data []byte) error {
 	h.Type = data[1]
 	h.Length = binary.BigEndian.Uint16(data[2:4])
 	h.Xid = binary.BigEndian.Uint32(data[4:8])
+
+	log.Debugf("Header: %+v", h)
 	return nil
 }
 
@@ -118,8 +122,8 @@ func NewHelloElemVersionBitmap() *HelloElemVersionBitmap {
 	h := new(HelloElemVersionBitmap)
 	h.HelloElemHeader = *NewHelloElemHeader()
 	h.Bitmaps = make([]uint32, 0)
-	// 10010 meaning openflow 1.0 & 1.3 support
-	h.Bitmaps = append(h.Bitmaps, uint32(1<<4)|uint32(1<<1))
+	// 0100 0010 meaning openflow 1.0 & 1.5 support
+	h.Bitmaps = append(h.Bitmaps, uint32(1<<6)|uint32(1<<1))
 	h.Length = h.Length + uint16(len(h.Bitmaps)*4)
 	return h
 }

openflow13/action.go

@@ -7,7 +7,7 @@ import (
 	"antrea.io/libOpenflow/util"
 )
 
-// ofp_action_type 1.3
+// ofp_action_type
 const (
 	ActionType_Output     = 0
 	ActionType_CopyTtlOut = 11