diff --git a/src/python/of12/message.py b/src/python/of12/message.py
new file mode 100644
index 0000000..1525b63
--- /dev/null
+++ b/src/python/of12/message.py
@@ -0,0 +1,3814 @@
+
+# Python OpenFlow message wrapper classes
+
+from cstruct import *
+from match import oxm_tlv
+from match import roundup
+from match_list import match_list
+from action_list import action_list
+from instruction_list import instruction_list
+from bucket_list import bucket_list
+from error import *
+
+# Define templates for documentation
+class ofp_template_msg(object):
+    """
+    Sample base class for template_msg; normally auto generated
+    This class should live in the of_header name space and provides the
+    base class for this type of message.  It will be wrapped for the
+    high level API.
+
+    """
+    def __init__(self):
+        """
+        Constructor for base class
+
+        """
+        self.header = ofp_header()
+        # Additional base data members declared here
+
+    # Normally will define pack, unpack, __len__ functions
+
+class template_msg(ofp_template_msg):
+    """
+    Sample class wrapper for template_msg
+    This class should live in the of_message name space and provides the
+    high level API for an OpenFlow message object.  These objects must
+    implement the functions indicated in this template.
+
+    """
+    def __init__(self):
+        """
+        Constructor
+        Must set the header type value appropriately for the message
+
+        """
+
+        ##@var header
+        # OpenFlow message header: length, version, xid, type
+        ofp_template_msg.__init__(self)
+        self.header = ofp_header()
+        # For a real message, will be set to an integer
+        self.header.type = "TEMPLATE_MSG_VALUE"
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        pass
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+
+        @return Typically returns the remainder of binary_string that
+        was not parsed.  May give a warning if that string is non-empty
+
+        """
+        pass
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        pass
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+        pass
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        pass
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        pass
+
+
+################################################################
+#
+# OpenFlow Message Definitions
+#
+################################################################
+
+class barrier_reply(object):
+    """
+    Wrapper class for barrier_reply
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_BARRIER_REPLY=21)
+
+
+    """
+
+    def __init__(self):
+        self.header = ofp_header()
+        self.header.type = OFPT_BARRIER_REPLY
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'barrier_reply (OFPT_BARRIER_REPLY)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class barrier_request(object):
+    """
+    Wrapper class for barrier_request
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_BARRIER_REQUEST=20)
+
+
+    """
+
+    def __init__(self):
+        self.header = ofp_header()
+        self.header.type = OFPT_BARRIER_REQUEST
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'barrier_request (OFPT_BARRIER_REQUEST)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class echo_reply(object):
+    """
+    Wrapper class for echo_reply
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_ECHO_REPLY=3)
+
+    @arg data: Binary string following message members
+
+    """
+
+    def __init__(self):
+        self.header = ofp_header()
+        self.header.type = OFPT_ECHO_REPLY
+        self.data = ""
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += self.data
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        self.data = binary_string
+        binary_string = ''
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += len(self.data)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'echo_reply (OFPT_ECHO_REPLY)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += prefix + 'data is of length ' + str(len(self.data)) + '\n'
+        ##@todo Fix this circular reference
+        # if len(self.data) > 0:
+            # obj = of_message_parse(self.data)
+            # if obj != None:
+                # outstr += obj.show(prefix)
+            # else:
+                # outstr += prefix + "Unable to parse data\n"
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if self.data != other.data: return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class echo_request(object):
+    """
+    Wrapper class for echo_request
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_ECHO_REQUEST=2)
+
+    @arg data: Binary string following message members
+
+    """
+
+    def __init__(self):
+        self.header = ofp_header()
+        self.header.type = OFPT_ECHO_REQUEST
+        self.data = ""
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += self.data
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        self.data = binary_string
+        binary_string = ''
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += len(self.data)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'echo_request (OFPT_ECHO_REQUEST)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += prefix + 'data is of length ' + str(len(self.data)) + '\n'
+        ##@todo Fix this circular reference
+        # if len(self.data) > 0:
+            # obj = of_message_parse(self.data)
+            # if obj != None:
+                # outstr += obj.show(prefix)
+            # else:
+                # outstr += prefix + "Unable to parse data\n"
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if self.data != other.data: return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class error(ofp_error_msg):
+    """
+    Wrapper class for error
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_ERROR=1)
+
+    Data members inherited from ofp_error_msg:
+    @arg type
+    @arg code
+    @arg data: Binary string following message members
+
+    """
+
+    def __init__(self):
+        ofp_error_msg.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_ERROR
+        self.data = ""
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += ofp_error_msg.pack(self)
+        packed += self.data
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        binary_string = ofp_error_msg.unpack(self, binary_string)
+        self.data = binary_string
+        binary_string = ''
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_error_msg.__len__(self)
+        length += len(self.data)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'error (OFPT_ERROR)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_error_msg.show(self, prefix)
+        outstr += prefix + 'data is of length ' + str(len(self.data)) + '\n'
+        ##@todo Fix this circular reference
+        # if len(self.data) > 0:
+            # obj = of_message_parse(self.data)
+            # if obj != None:
+                # outstr += obj.show(prefix)
+            # else:
+                # outstr += prefix + "Unable to parse data\n"
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_error_msg.__eq__(self, other): return False
+        if self.data != other.data: return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class experimenter(ofp_experimenter_header):
+    """
+    Wrapper class for experimenter
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_EXPERIMENTER=4)
+
+    Data members inherited from ofp_experimenter_header:
+    @arg experimenter
+    @arg exp_type
+    @arg data: Binary string following message members
+
+    """
+
+    def __init__(self):
+        ofp_experimenter_header.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_EXPERIMENTER
+        self.data = ""
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += ofp_experimenter_header.pack(self)
+        packed += self.data
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        binary_string = ofp_experimenter_header.unpack(self, binary_string)
+        self.data = binary_string
+        binary_string = ''
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_experimenter_header.__len__(self)
+        length += len(self.data)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'experimenter (OFPT_EXPERIMENTER)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_experimenter_header.show(self, prefix)
+        outstr += prefix + 'data is of length ' + str(len(self.data)) + '\n'
+        ##@todo Fix this circular reference
+        # if len(self.data) > 0:
+            # obj = of_message_parse(self.data)
+            # if obj != None:
+                # outstr += obj.show(prefix)
+            # else:
+                # outstr += prefix + "Unable to parse data\n"
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_experimenter_header.__eq__(self, other): return False
+        if self.data != other.data: return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class features_reply(ofp_switch_features):
+    """
+    Wrapper class for features_reply
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_FEATURES_REPLY=6)
+
+    Data members inherited from ofp_switch_features:
+    @arg datapath_id
+    @arg n_buffers
+    @arg n_tables
+    @arg capabilities
+    @arg reserved
+    @arg ports: Variable length array of TBD
+
+    """
+
+    def __init__(self):
+        ofp_switch_features.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_FEATURES_REPLY
+        self.ports = []
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += ofp_switch_features.pack(self)
+        for obj in self.ports:
+            packed += obj.pack()
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        binary_string = ofp_switch_features.unpack(self, binary_string)
+        while len(binary_string) >= OFP_PORT_BYTES:
+            new_port = ofp_port()
+            binary_string = new_port.unpack(binary_string)
+            self.ports.append(new_port)
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_switch_features.__len__(self)
+        for obj in self.ports:
+            length += len(obj)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'features_reply (OFPT_FEATURES_REPLY)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_switch_features.show(self, prefix)
+        outstr += prefix + "Array ports\n"
+        for obj in self.ports:
+            outstr += obj.show(prefix + '  ')
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_switch_features.__eq__(self, other): return False
+        if self.ports != other.ports: return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class features_request(object):
+    """
+    Wrapper class for features_request
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_FEATURES_REQUEST=5)
+
+
+    """
+
+    def __init__(self):
+        self.header = ofp_header()
+        self.header.type = OFPT_FEATURES_REQUEST
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'features_request (OFPT_FEATURES_REQUEST)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class flow_mod(ofp_flow_mod):
+    """
+    Wrapper class for flow_mod
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_FLOW_MOD=14)
+
+    Data members inherited from ofp_flow_mod:
+    @arg cookie
+    @arg cookie_mask
+    @arg table_id
+    @arg command
+    @arg idle_timeout
+    @arg hard_timeout
+    @arg priority
+    @arg buffer_id
+    @arg out_port
+    @arg out_group
+    @arg flags
+    @arg match
+    @arg instructions: Object of type instruction_list
+
+    """
+
+    def __init__(self):
+        ofp_flow_mod.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_FLOW_MOD
+        self.buffer_id = 0xffffffff   #no buffer
+        self.out_port = OFPP_ANY
+        self.out_group = OFPG_ANY
+        self.match_fields = match_list()
+        self.instructions = instruction_list()
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        if not len(self.match_fields):
+            tlv_pad = oxm_tlv(0,0,0,0,0,0)
+            self.match_fields.tlvs.append(tlv_pad)
+        else:
+            if len(self.match_fields) > 4:
+                self.match.length +=  len(self.match_fields)
+        packed = self.header.pack() 
+        packed += ofp_flow_mod.pack(self)
+        self.match_fields.tlvs.sort(key=lambda x : x.field)
+        packed += self.match_fields.pack()
+        padding_size = roundup( len(self.match) + len(self.match_fields),8) - (len(self.match) + len(self.match_fields))
+        padding = [0] * padding_size
+        if padding_size:
+            packed += struct.pack("!" + str(padding_size) + "B", *padding)
+        packed += self.instructions.pack()
+        return packed
+
+
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_flow_mod.unpack(self, binary_string)
+        binary_string = self.match_fields.unpack(binary_string, bytes = self.match.length - 4)
+        padding = roundup(OFP_FLOW_MOD_BYTES + len(self.match_fields),8) - (OFP_FLOW_MOD_BYTES + len(self.match_fields))
+        if padding:
+            binary_string = binary_string[padding:]
+        ai_len = self.length - roundup(OFP_FLOW_MOD_BYTES + len(self.match_fields),8)
+        binary_string = self.instructions.unpack(binary_string, bytes=ai_len)
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_flow_mod.__len__(self)
+        length = roundup(length + len(self.match_fields), 8)
+        length += len(self.instructions)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'flow_mod (OFPT_FLOW_MOD)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_flow_mod.show(self, prefix)
+        outstr += self.match_fields.show(prefix + '  ')
+        outstr += prefix + "List instructions\n"
+        outstr += self.instructions.show(prefix + '  ')
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_flow_mod.__eq__(self, other): return False
+        if self.match_fields != other.match_fields: return False
+        if self.instructions != other.instructions: return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class flow_removed(ofp_flow_removed):
+    """
+    Wrapper class for flow_removed
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_FLOW_REMOVED=11)
+
+    Data members inherited from ofp_flow_removed:
+    @arg cookie
+    @arg priority
+    @arg reason
+    @arg table_id
+    @arg duration_sec
+    @arg duration_nsec
+    @arg idle_timeout
+    @arg hard_timeout
+    @arg packet_count
+    @arg byte_count
+    @arg match
+
+    """
+
+    def __init__(self):
+        ofp_flow_removed.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_FLOW_REMOVED
+        self.match_fields = match_list()
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        if not len(self.match_fields):
+            tlv_pad = oxm_tlv(0,0,0,0,0,0)
+            self.match.length += 4
+            self.match_fields.tlvs.append(tlv_pad)
+        else:
+            if len(self.match_fields) > 4:
+                self.match.length +=  len(self.match_fields)
+        packed = self.header.pack()
+        packed += ofp_flow_removed.pack(self)
+        packed += self.match_fields.pack()
+        padding_size = roundup( len(self.match) + len(self.match_fields),8) - (len(self.match) + len(self.match_fields))
+        padding = [0] * padding_size
+        if padding_size:
+            packed += struct.pack("!" + str(padding_size) + "B", *padding)
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_flow_removed.unpack(self, binary_string)
+        binary_string = self.match_fields.unpack(binary_string, bytes = self.match.length - 4)
+        padding = roundup(OFP_FLOW_REMOVED_BYTES + len(self.match_fields),8) - (OFP_FLOW_REMOVED_BYTES + len(self.match_fields))
+        if padding:
+            binary_string = binary_string[padding:]
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+        length += roundup(ofp_flow_removed.__len__(self) + len(self.match_fields),8)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'flow_removed (OFPT_FLOW_REMOVED)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_flow_removed.show(self, prefix)
+        outstr += self.match_fields.show(prefix + '  ')
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+        if not ofp_flow_removed.__eq__(self, other): return False
+        if self.match_fields != other.match_fields: return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class get_config_reply(ofp_switch_config):
+    """
+    Wrapper class for get_config_reply
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_GET_CONFIG_REPLY=8)
+
+    Data members inherited from ofp_switch_config:
+    @arg flags
+    @arg miss_send_len
+
+    """
+
+    def __init__(self):
+        ofp_switch_config.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_GET_CONFIG_REPLY
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += ofp_switch_config.pack(self)
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        binary_string = ofp_switch_config.unpack(self, binary_string)
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_switch_config.__len__(self)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'get_config_reply (OFPT_GET_CONFIG_REPLY)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_switch_config.show(self, prefix)
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_switch_config.__eq__(self, other): return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class get_config_request(object):
+    """
+    Wrapper class for get_config_request
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_GET_CONFIG_REQUEST=7)
+
+
+    """
+
+    def __init__(self):
+        self.header = ofp_header()
+        self.header.type = OFPT_GET_CONFIG_REQUEST
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'get_config_request (OFPT_GET_CONFIG_REQUEST)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class group_mod(ofp_group_mod):
+    """
+    Wrapper class for group_mod
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_GROUP_MOD=15)
+
+    Data members inherited from ofp_group_mod:
+    @arg command
+    @arg type
+    @arg group_id
+    @arg buckets: Object of type bucket_list
+
+    """
+
+    def __init__(self):
+        ofp_group_mod.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_GROUP_MOD
+        self.buckets = bucket_list()
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += ofp_group_mod.pack(self)
+        packed += self.buckets.pack()
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        binary_string = ofp_group_mod.unpack(self, binary_string)
+        binary_string = self.buckets.unpack(binary_string)
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_group_mod.__len__(self)
+        length += len(self.buckets)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'group_mod (OFPT_GROUP_MOD)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_group_mod.show(self, prefix)
+        outstr += prefix + "List buckets\n"
+        outstr += self.buckets.show(prefix + '  ')
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_group_mod.__eq__(self, other): return False
+        if self.buckets != other.buckets: return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class hello(object):
+    """
+    Wrapper class for hello
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_HELLO=0)
+
+    @arg data: Binary string following message members
+
+    """
+
+    def __init__(self):
+        self.header = ofp_header()
+        self.header.type = OFPT_HELLO
+        self.data = ""
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += self.data
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        self.data = binary_string
+        binary_string = ''
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += len(self.data)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'hello (OFPT_HELLO)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += prefix + 'data is of length ' + str(len(self.data)) + '\n'
+        ##@todo Fix this circular reference
+        # if len(self.data) > 0:
+            # obj = of_message_parse(self.data)
+            # if obj != None:
+                # outstr += obj.show(prefix)
+            # else:
+                # outstr += prefix + "Unable to parse data\n"
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if self.data != other.data: return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class packet_in(ofp_packet_in):
+    """
+    Wrapper class for packet_in
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_PACKET_IN=10)
+
+    Data members inherited from ofp_packet_in:
+    @arg buffer_id
+    @arg total_len
+    @arg reason
+    @arg table_id
+    @arg match
+    @arg data: Binary string following message members
+
+    """
+
+    def __init__(self):
+        ofp_packet_in.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_PACKET_IN
+        self.match_fields =  match_list()
+        self.data = ""
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        if len(self.match_fields) < 4:
+            tlv_pad = oxm_tlv(0,0,0,0,0,0)
+            self.match.length += 4
+            self.match_fields.tlvs.append(tlv_pad)
+        else:
+            if len(self.match_fields) > 4:
+                self.match.length +=  len(self.match_fields)
+        packed = self.header.pack()
+        packed += ofp_packet_in.pack(self)
+        packed += self.match_fields.pack()
+        padding_size = roundup( len(self.match) + len(self.match_fields),8) - (len(self.match) + len(self.match_fields))
+        padding = [0] * padding_size
+        if padding_size:
+            packed += struct.pack("!" + str(padding_size) + "B", *padding)
+        packed += self.data
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_packet_in.unpack(self, binary_string)
+        binary_string = self.match_fields.unpack(binary_string, bytes = self.match.length - 4)
+        padding = roundup(OFP_PACKET_IN_BYTES + len(self.match_fields),8) - (OFP_PACKET_IN_BYTES + len(self.match_fields))
+        if padding:
+            binary_string = binary_string[padding:]
+        binary_string = binary_string[2:]
+        self.data = binary_string
+        binary_string = ''
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += roundup(ofp_packet_in.__len__(self) + len(self.match_fields),8)
+        length += len(self.data)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'packet_in (OFPT_PACKET_IN)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_packet_in.show(self, prefix)
+        outstr += prefix + 'data is of length ' + str(len(self.data)) + '\n'
+        ##@todo Fix this circular reference
+        # if len(self.data) > 0:
+            # obj = of_message_parse(self.data)
+            # if obj != None:
+                # outstr += obj.show(prefix)
+            # else:
+                # outstr += prefix + "Unable to parse data\n"
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_packet_in.__eq__(self, other): return False
+        if self.data != other.data: return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class packet_out(ofp_packet_out):
+    """
+    Wrapper class for packet_out
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_PACKET_OUT=13)
+
+    Data members inherited from ofp_packet_out:
+    @arg buffer_id
+    @arg in_port
+    @arg actions_len
+    @arg actions: Object of type action_list
+    @arg data: Binary string following message members
+
+    """
+
+    def __init__(self):
+        ofp_packet_out.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_PACKET_OUT
+        self.actions = action_list()
+        self.data = ""
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        self.actions_len = len(self.actions)
+        packed += ofp_packet_out.pack(self)
+        packed += self.actions.pack()
+        packed += self.data
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        binary_string = ofp_packet_out.unpack(self, binary_string)
+        binary_string = self.actions.unpack(binary_string, bytes=self.actions_len)
+        self.data = binary_string
+        binary_string = ''
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_packet_out.__len__(self)
+        length += len(self.actions)
+        length += len(self.data)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'packet_out (OFPT_PACKET_OUT)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_packet_out.show(self, prefix)
+        outstr += prefix + "List actions\n"
+        outstr += self.actions.show(prefix + '  ')
+        outstr += prefix + 'data is of length ' + str(len(self.data)) + '\n'
+        ##@todo Fix this circular reference
+        # if len(self.data) > 0:
+            # obj = of_message_parse(self.data)
+            # if obj != None:
+                # outstr += obj.show(prefix)
+            # else:
+                # outstr += prefix + "Unable to parse data\n"
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_packet_out.__eq__(self, other): return False
+        if self.data != other.data: return False
+        if self.actions != other.actions: return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class port_mod(ofp_port_mod):
+    """
+    Wrapper class for port_mod
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_PORT_MOD=16)
+
+    Data members inherited from ofp_port_mod:
+    @arg port_no
+    @arg hw_addr
+    @arg config
+    @arg mask
+    @arg advertise
+
+    """
+
+    def __init__(self):
+        ofp_port_mod.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_PORT_MOD
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += ofp_port_mod.pack(self)
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        binary_string = ofp_port_mod.unpack(self, binary_string)
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_port_mod.__len__(self)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'port_mod (OFPT_PORT_MOD)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_port_mod.show(self, prefix)
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_port_mod.__eq__(self, other): return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class port_status(ofp_port_status):
+    """
+    Wrapper class for port_status
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_PORT_STATUS=12)
+
+    Data members inherited from ofp_port_status:
+    @arg reason
+    @arg desc
+
+    """
+
+    def __init__(self):
+        ofp_port_status.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_PORT_STATUS
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += ofp_port_status.pack(self)
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        binary_string = ofp_port_status.unpack(self, binary_string)
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_port_status.__len__(self)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'port_status (OFPT_PORT_STATUS)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_port_status.show(self, prefix)
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_port_status.__eq__(self, other): return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class queue_get_config_reply(ofp_queue_get_config_reply):
+    """
+    Wrapper class for queue_get_config_reply
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_QUEUE_GET_CONFIG_REPLY=23)
+
+    Data members inherited from ofp_queue_get_config_reply:
+    @arg port
+    @arg queues: Variable length array of TBD
+
+    """
+
+    def __init__(self):
+        ofp_queue_get_config_reply.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_QUEUE_GET_CONFIG_REPLY
+        self.queues = []
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += ofp_queue_get_config_reply.pack(self)
+        for obj in self.queues:
+            packed += obj.pack()
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        binary_string = ofp_queue_get_config_reply.unpack(self, binary_string)
+        for obj in self.queues:
+            binary_string = obj.unpack(binary_string)
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_queue_get_config_reply.__len__(self)
+        for obj in self.queues:
+            length += len(obj)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'queue_get_config_reply (OFPT_QUEUE_GET_CONFIG_REPLY)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_queue_get_config_reply.show(self, prefix)
+        outstr += prefix + "Array queues\n"
+        for obj in self.queues:
+            outstr += obj.show(prefix + '  ')
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_queue_get_config_reply.__eq__(self, other): return False
+        if self.queues != other.queues: return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class queue_get_config_request(ofp_queue_get_config_request):
+    """
+    Wrapper class for queue_get_config_request
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_QUEUE_GET_CONFIG_REQUEST=22)
+
+    Data members inherited from ofp_queue_get_config_request:
+    @arg port
+
+    """
+
+    def __init__(self):
+        ofp_queue_get_config_request.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_QUEUE_GET_CONFIG_REQUEST
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += ofp_queue_get_config_request.pack(self)
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        binary_string = ofp_queue_get_config_request.unpack(self, binary_string)
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_queue_get_config_request.__len__(self)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'queue_get_config_request (OFPT_QUEUE_GET_CONFIG_REQUEST)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_queue_get_config_request.show(self, prefix)
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_queue_get_config_request.__eq__(self, other): return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class set_config(ofp_switch_config):
+    """
+    Wrapper class for set_config
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_SET_CONFIG=9)
+
+    Data members inherited from ofp_switch_config:
+    @arg flags
+    @arg miss_send_len
+
+    """
+
+    def __init__(self):
+        ofp_switch_config.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_SET_CONFIG
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += ofp_switch_config.pack(self)
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        binary_string = ofp_switch_config.unpack(self, binary_string)
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_switch_config.__len__(self)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'set_config (OFPT_SET_CONFIG)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_switch_config.show(self, prefix)
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_switch_config.__eq__(self, other): return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class stats_reply(ofp_stats_reply):
+    """
+    Wrapper class for stats_reply
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_STATS_REPLY=19)
+
+    Data members inherited from ofp_stats_reply:
+    @arg type
+    @arg flags
+
+    """
+
+    def __init__(self):
+        ofp_stats_reply.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_STATS_REPLY
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += ofp_stats_reply.pack(self)
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        binary_string = ofp_stats_reply.unpack(self, binary_string)
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_stats_reply.__len__(self)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'stats_reply (OFPT_STATS_REPLY)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_reply.show(self, prefix)
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_stats_reply.__eq__(self, other): return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class stats_request(ofp_stats_request):
+    """
+    Wrapper class for stats_request
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_STATS_REQUEST=18)
+
+    Data members inherited from ofp_stats_request:
+    @arg type
+    @arg flags
+
+    """
+
+    def __init__(self):
+        ofp_stats_request.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_STATS_REQUEST
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += ofp_stats_request.pack(self)
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        binary_string = ofp_stats_request.unpack(self, binary_string)
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_stats_request.__len__(self)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'stats_request (OFPT_STATS_REQUEST)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_request.show(self, prefix)
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_stats_request.__eq__(self, other): return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+class table_mod(ofp_table_mod):
+    """
+    Wrapper class for table_mod
+
+    OpenFlow message header: length, version, xid, type
+    @arg length: The total length of the message
+    @arg version: The OpenFlow version (3)
+    @arg xid: The transaction ID
+    @arg type: The message type (OFPT_TABLE_MOD=17)
+
+    Data members inherited from ofp_table_mod:
+    @arg table_id
+    @arg config
+
+    """
+
+    def __init__(self):
+        ofp_table_mod.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_TABLE_MOD
+
+
+    def pack(self):
+        """
+        Pack object into string
+
+        @return The packed string which can go on the wire
+
+        """
+        self.header.length = len(self)
+        packed = self.header.pack()
+
+        packed += ofp_table_mod.pack(self)
+        return packed
+
+    def unpack(self, binary_string):
+        """
+        Unpack object from a binary string
+
+        @param binary_string The wire protocol byte string holding the object
+        represented as an array of bytes.
+        @return The remainder of binary_string that was not parsed.
+
+        """
+        binary_string = self.header.unpack(binary_string)
+
+        binary_string = ofp_table_mod.unpack(self, binary_string)
+        # Fixme: If no self.data, add check for data remaining
+        return binary_string
+
+    def __len__(self):
+        """
+        Return the length of this object once packed into a string
+
+        @return An integer representing the number bytes in the packed
+        string.
+
+        """
+        length = OFP_HEADER_BYTES
+
+        length += ofp_table_mod.__len__(self)
+        return length
+
+    def show(self, prefix=''):
+        """
+        Generate a string (with multiple lines) describing the contents
+        of the object in a readable manner
+
+        @param prefix Pre-pended at the beginning of each line.
+
+        """
+
+        outstr = prefix + 'table_mod (OFPT_TABLE_MOD)\n'
+        prefix += '  '
+        outstr += prefix + 'ofp header\n'
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_table_mod.show(self, prefix)
+        return outstr
+
+    def __eq__(self, other):
+        """
+        Return True if self and other hold the same data
+
+        @param other Other object in comparison
+
+        """
+        if type(self) != type(other): return False
+        if not self.header.__eq__(other.header): return False
+
+        if not ofp_table_mod.__eq__(self, other): return False
+        return True
+
+    def __ne__(self, other):
+        """
+        Return True if self and other do not hold the same data
+
+        @param other Other object in comparison
+
+        """
+        return not self.__eq__(other)
+    
+
+
+################################################################
+#
+# Stats request and reply subclass definitions
+#
+################################################################
+
+
+# Stats request bodies for desc and table stats are not defined in the
+# OpenFlow header;  We define them here.  They are empty classes, really
+
+class ofp_desc_stats_request(object):
+    """
+    Forced definition of ofp_desc_stats_request (empty class)
+    """
+    def __init__(self):
+        pass
+    def pack(self, assertstruct=True):
+        return ""
+    def unpack(self, binary_string):
+        return binary_string
+    def __len__(self):
+        return 0
+    def show(self, prefix=''):
+        return prefix + "ofp_desc_stats_request (empty)\n"
+    def __eq__(self, other):
+        return type(self) == type(other)
+    def __ne__(self, other):
+        return type(self) != type(other)
+
+OFP_DESC_STATS_REQUEST_BYTES = 0
+
+class ofp_table_stats_request(object):
+    """
+    Forced definition of ofp_table_stats_request (empty class)
+    """
+    def __init__(self):
+        pass
+    def pack(self, assertstruct=True):
+        return ""
+    def unpack(self, binary_string):
+        return binary_string
+    def __len__(self):
+        return 0
+    def show(self, prefix=''):
+        return prefix + "ofp_table_stats_request (empty)\n"
+    def __eq__(self, other):
+        return type(self) == type(other)
+    def __ne__(self, other):
+        return type(self) != type(other)
+
+OFP_TABLE_STATS_REQUEST_BYTES = 0
+
+class ofp_group_desc_stats_request(object):
+    """
+    Forced definition of ofp_group_desc_stats_request (empty class)
+    """
+    def __init__(self):
+        pass
+    def pack(self, assertstruct=True):
+        return ""
+    def unpack(self, binary_string):
+        return binary_string
+    def __len__(self):
+        return 0
+    def show(self, prefix=''):
+        return prefix + "ofp_group_desc_stats_request (empty)\n"
+    def __eq__(self, other):
+        return type(self) == type(other)
+    def __ne__(self, other):
+        return type(self) != type(other)
+
+OFP_GROUP_DESC_STATS_REQUEST_BYTES = 0
+
+
+
+# Stats entries define the content of one element in a stats
+# reply for the indicated type; define _entry for consistency
+
+aggregate_stats_entry = ofp_aggregate_stats_reply
+desc_stats_entry = ofp_desc_stats
+port_stats_entry = ofp_port_stats
+queue_stats_entry = ofp_queue_stats
+table_stats_entry = ofp_table_stats
+group_stats_entry = ofp_group_stats
+group_desc_stats_entry = ofp_group_desc_stats
+
+
+#
+# Flow stats entry contains an action list of variable length, so
+# it is done by hand
+#
+
+class flow_stats_entry(ofp_flow_stats):
+    """
+    Special case flow stats entry to handle action list object
+    """
+    def __init__(self):
+        ofp_flow_stats.__init__(self)
+        self.match_fields = match_list()
+        self.instructions = instruction_list()
+
+    def pack(self, assertstruct=True):
+        self.length = len(self)
+        if not len(self.match_fields):
+            tlv_pad = oxm_tlv(0,0,0,0,0,0)
+            self.match.length += 4
+            self.match_fields.tlvs.append(tlv_pad)
+        else:
+            if len(self.match_fields) > 4:
+                self.match.length +=  len(self.match_fields)      
+        packed = ofp_flow_stats.pack(self, assertstruct)
+        packed += self.match_fields.pack()
+        padding_size = roundup(len(self.match) + len(self.match_fields),8) - (len(self.match) + len(self.match_fields))
+        padding = [0] * padding_size
+        if padding_size:
+            packed += struct.pack("!" + str(padding_size) + "B", *padding)
+        packed += self.instructions.pack()
+        if len(packed) != self.length:
+            print("ERROR: flow_stats_entry pack length not equal",
+                  self.length, len(packed))
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = ofp_flow_stats.unpack(self, binary_string)
+        binary_string = self.match_fields.unpack(binary_string, bytes = self.match.length - 4)
+        padding = roundup((OFP_FLOW_STATS_BYTES -4) + self.match.length,8) - ((OFP_FLOW_STATS_BYTES - 4) + self.match.length)
+        if padding:
+            binary_string = binary_string[padding:]
+        ai_len = self.length - roundup(OFP_FLOW_STATS_BYTES + len(self.match_fields),8)
+        if ai_len < 0:
+            print("ERROR: flow_stats_entry unpack length too small",
+                  self.length)
+        binary_string = self.instructions.unpack(binary_string, bytes=ai_len)
+        return binary_string
+
+    def __len__(self):
+        return roundup(OFP_FLOW_STATS_BYTES + len(self.match_fields),8) + len(self.instructions)
+
+    def show(self, prefix=''):
+        outstr = prefix + "flow_stats_entry\n"
+        outstr += ofp_flow_stats.show(self, prefix + '  ')
+        outstr += self.match_fields.show(prefix + '  ')
+        outstr += self.instructions.show(prefix + '  ')
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (ofp_flow_stats.__eq__(self, other) and 
+                self.instructions == other.instructions)
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class aggregate_stats_request(ofp_stats_request, ofp_aggregate_stats_request):
+    """
+    Wrapper class for aggregate stats request message
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_request.__init__(self)
+        ofp_aggregate_stats_request.__init__(self)
+        self.header.type = OFPT_STATS_REQUEST
+        self.type = OFPST_AGGREGATE
+        self.match_fields = match_list()
+        
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_request.pack(self)
+        if not len(self.match_fields):
+            tlv_pad = oxm_tlv(0,0,0,0,0,0)
+            self.match.length += 4
+            self.match_fields.tlvs.append(tlv_pad)
+        else:
+            if len(self.match_fields) > 4:
+                self.match.length +=  len(self.match_fields)      
+        packed += ofp_aggregate_stats_request.pack(self, assertstruct)
+        packed += self.match_fields.pack()
+        padding_size = roundup(len(self.match) + len(self.match_fields),8) - (len(self.match) + len(self.match_fields))
+        padding = [0] * padding_size
+        
+        if padding_size:
+            packed += struct.pack("!" + str(padding_size) + "B", *padding)
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_request.unpack(self, binary_string)
+        binary_string = ofp_aggregate_stats_request.unpack(self, binary_string)
+        binary_string = self.match_fields.unpack(binary_string, bytes = self.match.length - 4)
+        padding = roundup(OFP_AGGREGATE_STATS_REQUEST_BYTES + len(self.match_fields),8) - (OFP_AGGREGATE_STATS_REQUEST_BYTES + len(self.match_fields))
+        if padding:
+            binary_string = binary_string[padding:]
+        if len(binary_string) != 0:
+            print "ERROR unpacking flow: extra data"
+        return binary_string
+    
+    
+    def __len__(self):
+        length = len(self.header) + OFP_STATS_REQUEST_BYTES + \
+                     OFP_AGGREGATE_STATS_REQUEST_BYTES
+        if not len(self.match_fields):
+            return length + 4            
+        else:
+            return  roundup(length + len(self.match_fields),8) 
+
+    def show(self, prefix=''):
+        outstr = prefix + "aggregate_stats_request\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_request.show(self)
+        outstr += ofp_aggregate_stats_request.show(self)
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_request.__eq__(self, other) and
+                ofp_aggregate_stats_request.__eq__(self, other))
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class aggregate_stats_reply(ofp_stats_reply):
+    """
+    Wrapper class for aggregate stats reply
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_reply.__init__(self)
+        self.header.type = OFPT_STATS_REPLY
+        self.type = OFPST_AGGREGATE
+        # stats: Array of type aggregate_stats_entry
+        self.stats = []
+
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_reply.pack(self)
+        for obj in self.stats:
+            packed += obj.pack()
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_reply.unpack(self, binary_string)
+        dummy = aggregate_stats_entry()
+        while len(binary_string) >= len(dummy):
+            obj = aggregate_stats_entry()
+            binary_string = obj.unpack(binary_string)
+            self.stats.append(obj)
+        if len(binary_string) != 0:
+            print "ERROR unpacking aggregate stats string: extra bytes"
+        return binary_string
+
+    def __len__(self):
+        length = len(self.header) + OFP_STATS_REPLY_BYTES
+        for obj in self.stats:
+            length += len(obj)
+        return length
+
+    def show(self, prefix=''):
+        outstr = prefix + "aggregate_stats_reply\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_reply.show(self)
+        outstr += prefix + "Stats array of length " + str(len(self.stats)) + '\n'
+        for obj in self.stats:
+            outstr += obj.show()
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_reply.__eq__(self, other) and
+                self.stats == other.stats)
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class desc_stats_request(ofp_stats_request, ofp_desc_stats_request):
+    """
+    Wrapper class for desc stats request message
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_request.__init__(self)
+        ofp_desc_stats_request.__init__(self)
+        self.header.type = OFPT_STATS_REQUEST
+        self.type = OFPST_DESC
+
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_request.pack(self)
+        packed += ofp_desc_stats_request.pack(self)
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_request.unpack(self, binary_string)
+        binary_string = ofp_desc_stats_request.unpack(self, binary_string)
+        if len(binary_string) != 0:
+            print "ERROR unpacking desc: extra data"
+        return binary_string
+
+    def __len__(self):
+        return len(self.header) + OFP_STATS_REQUEST_BYTES + \
+               OFP_DESC_STATS_REQUEST_BYTES
+
+    def show(self, prefix=''):
+        outstr = prefix + "desc_stats_request\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_request.show(self)
+        outstr += ofp_desc_stats_request.show(self)
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_request.__eq__(self, other) and
+                ofp_desc_stats_request.__eq__(self, other))
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class desc_stats_reply(ofp_stats_reply):
+    """
+    Wrapper class for desc stats reply
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_reply.__init__(self)
+        self.header.type = OFPT_STATS_REPLY
+        self.type = OFPST_DESC
+        # stats: Array of type desc_stats_entry
+        self.stats = []
+
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_reply.pack(self)
+        for obj in self.stats:
+            packed += obj.pack()
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_reply.unpack(self, binary_string)
+        dummy = desc_stats_entry()
+        while len(binary_string) >= len(dummy):
+            obj = desc_stats_entry()
+            binary_string = obj.unpack(binary_string)
+            self.stats.append(obj)
+        if len(binary_string) != 0:
+            print "ERROR unpacking desc stats string: extra bytes"
+        return binary_string
+
+    def __len__(self):
+        length = len(self.header) + OFP_STATS_REPLY_BYTES
+        for obj in self.stats:
+            length += len(obj)
+        return length
+
+    def show(self, prefix=''):
+        outstr = prefix + "desc_stats_reply\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_reply.show(self)
+        outstr += prefix + "Stats array of length " + str(len(self.stats)) + '\n'
+        for obj in self.stats:
+            outstr += obj.show()
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_reply.__eq__(self, other) and
+                self.stats == other.stats)
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class flow_stats_request(ofp_stats_request, ofp_flow_stats_request):
+    """
+    Wrapper class for flow stats request message
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_request.__init__(self)
+        ofp_flow_stats_request.__init__(self)
+        self.header.type = OFPT_STATS_REQUEST
+        self.type = OFPST_FLOW
+        self.match_fields = match_list()
+
+    def pack(self):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_request.pack(self)
+        if not len(self.match_fields):
+            tlv_pad = oxm_tlv(0,0,0,0,0,0)
+            self.match.length += 4
+            self.match_fields.tlvs.append(tlv_pad)
+        else:
+            if len(self.match_fields) > 4:
+                self.match.length +=  len(self.match_fields)       
+        packed += ofp_flow_stats_request.pack(self)
+        packed += self.match_fields.pack()
+        padding_size = roundup(len(self.match) + len(self.match_fields),8) - (len(self.match) + len(self.match_fields))
+        padding = [0] * padding_size
+        if padding_size:
+            packed += struct.pack("!" + str(padding_size) + "B", *padding)  
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_request.unpack(self, binary_string)
+        binary_string = ofp_flow_stats_request.unpack(self, binary_string)
+        binary_string = self.match_fields.unpack(binary_string, bytes = self.match.length - 4)
+        padding = roundup(OFP_FLOW_STATS_REQUEST_BYTES + len(self.match_fields),8) - (OFP_FLOW_STATS_REQUEST_BYTES + len(self.match_fields))
+        if padding:
+            binary_string = binary_string[padding:]
+        if len(binary_string) != 0:
+            print "ERROR unpacking flow: extra data"
+        return binary_string
+
+    def __len__(self):
+            length = len(self.header) + OFP_STATS_REQUEST_BYTES + \
+                     OFP_FLOW_STATS_REQUEST_BYTES
+            if not len(self.match_fields):
+               return length + 4            
+            else:
+               return  roundup(length + len(self.match_fields),8) 
+
+    def show(self, prefix=''):
+        outstr = prefix + "flow_stats_request\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_request.show(self)
+        outstr += ofp_flow_stats_request.show(self)
+        outstr += self.match_fields.show(prefix + '  ')
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_request.__eq__(self, other) and
+                ofp_flow_stats_request.__eq__(self, other) and
+                self.match_fields != other.match_fields)
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class flow_stats_reply(ofp_stats_reply):
+    """
+    Wrapper class for flow stats reply
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_reply.__init__(self)
+        self.header.type = OFPT_STATS_REPLY
+        self.type = OFPST_FLOW
+        # stats: Array of type flow_stats_entry
+        self.stats = []
+
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_reply.pack(self)
+        for obj in self.stats:
+            packed += obj.pack()
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_reply.unpack(self, binary_string)
+        dummy = flow_stats_entry()
+        while len(binary_string) >= len(dummy):
+            obj = flow_stats_entry()
+            binary_string = obj.unpack(binary_string)
+            self.stats.append(obj)
+        if len(binary_string) != 0:
+            print "ERROR unpacking flow stats string: extra bytes"
+        return binary_string
+
+    def __len__(self):
+        length = len(self.header) + OFP_STATS_REPLY_BYTES
+        for obj in self.stats:
+            length += len(obj)
+        return length
+
+    def show(self, prefix=''):
+        outstr = prefix + "flow_stats_reply\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_reply.show(self)
+        outstr += prefix + "Stats array of length " + str(len(self.stats)) + '\n'
+        for obj in self.stats:
+            outstr += obj.show()
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_reply.__eq__(self, other) and
+                self.stats == other.stats)
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class port_stats_request(ofp_stats_request, ofp_port_stats_request):
+    """
+    Wrapper class for port stats request message
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_request.__init__(self)
+        ofp_port_stats_request.__init__(self)
+        self.header.type = OFPT_STATS_REQUEST
+        self.type = OFPST_PORT
+
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_request.pack(self)
+        packed += ofp_port_stats_request.pack(self)
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_request.unpack(self, binary_string)
+        binary_string = ofp_port_stats_request.unpack(self, binary_string)
+        if len(binary_string) != 0:
+            print "ERROR unpacking port: extra data"
+        return binary_string
+
+    def __len__(self):
+        return len(self.header) + OFP_STATS_REQUEST_BYTES + \
+               OFP_PORT_STATS_REQUEST_BYTES
+
+    def show(self, prefix=''):
+        outstr = prefix + "port_stats_request\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_request.show(self)
+        outstr += ofp_port_stats_request.show(self)
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_request.__eq__(self, other) and
+                ofp_port_stats_request.__eq__(self, other))
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class port_stats_reply(ofp_stats_reply):
+    """
+    Wrapper class for port stats reply
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_reply.__init__(self)
+        self.header.type = OFPT_STATS_REPLY
+        self.type = OFPST_PORT
+        # stats: Array of type port_stats_entry
+        self.stats = []
+
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_reply.pack(self)
+        for obj in self.stats:
+            packed += obj.pack()
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_reply.unpack(self, binary_string)
+        dummy = port_stats_entry()
+        while len(binary_string) >= len(dummy):
+            obj = port_stats_entry()
+            binary_string = obj.unpack(binary_string)
+            self.stats.append(obj)
+        if len(binary_string) != 0:
+            print "ERROR unpacking port stats string: extra bytes"
+        return binary_string
+
+    def __len__(self):
+        length = len(self.header) + OFP_STATS_REPLY_BYTES
+        for obj in self.stats:
+            length += len(obj)
+        return length
+
+    def show(self, prefix=''):
+        outstr = prefix + "port_stats_reply\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_reply.show(self)
+        outstr += prefix + "Stats array of length " + str(len(self.stats)) + '\n'
+        for obj in self.stats:
+            outstr += obj.show()
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_reply.__eq__(self, other) and
+                self.stats == other.stats)
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class queue_stats_request(ofp_stats_request, ofp_queue_stats_request):
+    """
+    Wrapper class for queue stats request message
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_request.__init__(self)
+        ofp_queue_stats_request.__init__(self)
+        self.header.type = OFPT_STATS_REQUEST
+        self.type = OFPST_QUEUE
+
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_request.pack(self)
+        packed += ofp_queue_stats_request.pack(self)
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_request.unpack(self, binary_string)
+        binary_string = ofp_queue_stats_request.unpack(self, binary_string)
+        if len(binary_string) != 0:
+            print "ERROR unpacking queue: extra data"
+        return binary_string
+
+    def __len__(self):
+        return len(self.header) + OFP_STATS_REQUEST_BYTES + \
+               OFP_QUEUE_STATS_REQUEST_BYTES
+
+    def show(self, prefix=''):
+        outstr = prefix + "queue_stats_request\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_request.show(self)
+        outstr += ofp_queue_stats_request.show(self)
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_request.__eq__(self, other) and
+                ofp_queue_stats_request.__eq__(self, other))
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class queue_stats_reply(ofp_stats_reply):
+    """
+    Wrapper class for queue stats reply
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_reply.__init__(self)
+        self.header.type = OFPT_STATS_REPLY
+        self.type = OFPST_QUEUE
+        # stats: Array of type queue_stats_entry
+        self.stats = []
+
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_reply.pack(self)
+        for obj in self.stats:
+            packed += obj.pack()
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_reply.unpack(self, binary_string)
+        dummy = queue_stats_entry()
+        while len(binary_string) >= len(dummy):
+            obj = queue_stats_entry()
+            binary_string = obj.unpack(binary_string)
+            self.stats.append(obj)
+        if len(binary_string) != 0:
+            print "ERROR unpacking queue stats string: extra bytes"
+        return binary_string
+
+    def __len__(self):
+        length = len(self.header) + OFP_STATS_REPLY_BYTES
+        for obj in self.stats:
+            length += len(obj)
+        return length
+
+    def show(self, prefix=''):
+        outstr = prefix + "queue_stats_reply\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_reply.show(self)
+        outstr += prefix + "Stats array of length " + str(len(self.stats)) + '\n'
+        for obj in self.stats:
+            outstr += obj.show()
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_reply.__eq__(self, other) and
+                self.stats == other.stats)
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class group_stats_request(ofp_stats_request, ofp_group_stats_request):
+    """
+    Wrapper class for group stats request message
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_request.__init__(self)
+        ofp_group_stats_request.__init__(self)
+        self.header.type = OFPT_STATS_REQUEST
+        self.type = OFPST_GROUP
+
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_request.pack(self)
+        packed += ofp_group_stats_request.pack(self)
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_request.unpack(self, binary_string)
+        binary_string = ofp_group_stats_request.unpack(self, binary_string)
+        if len(binary_string) != 0:
+            print "ERROR unpacking group: extra data"
+        return binary_string
+
+    def __len__(self):
+        return len(self.header) + OFP_STATS_REQUEST_BYTES + \
+               OFP_GROUP_STATS_REQUEST_BYTES
+
+    def show(self, prefix=''):
+        outstr = prefix + "group_stats_request\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_request.show(self)
+        outstr += ofp_group_stats_request.show(self)
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_request.__eq__(self, other) and
+                ofp_group_stats_request.__eq__(self, other))
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class group_stats_reply(ofp_stats_reply):
+    """
+    Wrapper class for group stats reply
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_reply.__init__(self)
+        self.header.type = OFPT_STATS_REPLY
+        self.type = OFPST_GROUP
+        # stats: Array of type group_stats_entry
+        self.stats = []
+
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_reply.pack(self)
+        for obj in self.stats:
+            packed += obj.pack()
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_reply.unpack(self, binary_string)
+        dummy = group_stats_entry()
+        while len(binary_string) >= len(dummy):
+            obj = group_stats_entry()
+            binary_string = obj.unpack(binary_string)
+            self.stats.append(obj)
+        if len(binary_string) != 0:
+            print "ERROR unpacking group stats string: extra bytes"
+        return binary_string
+
+    def __len__(self):
+        length = len(self.header) + OFP_STATS_REPLY_BYTES
+        for obj in self.stats:
+            length += len(obj)
+        return length
+
+    def show(self, prefix=''):
+        outstr = prefix + "group_stats_reply\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_reply.show(self)
+        outstr += prefix + "Stats array of length " + str(len(self.stats)) + '\n'
+        for obj in self.stats:
+            outstr += obj.show()
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_reply.__eq__(self, other) and
+                self.stats == other.stats)
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class group_desc_stats_request(ofp_stats_request, ofp_group_desc_stats_request):
+    """
+    Wrapper class for group_desc stats request message
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_request.__init__(self)
+        ofp_group_desc_stats_request.__init__(self)
+        self.header.type = OFPT_STATS_REQUEST
+        self.type = OFPST_GROUP_DESC
+
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_request.pack(self)
+        packed += ofp_group_desc_stats_request.pack(self)
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_request.unpack(self, binary_string)
+        binary_string = ofp_group_desc_stats_request.unpack(self, binary_string)
+        if len(binary_string) != 0:
+            print "ERROR unpacking group_desc: extra data"
+        return binary_string
+
+    def __len__(self):
+        return len(self.header) + OFP_STATS_REQUEST_BYTES + \
+               OFP_GROUP_DESC_STATS_REQUEST_BYTES
+
+    def show(self, prefix=''):
+        outstr = prefix + "group_desc_stats_request\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_request.show(self)
+        outstr += ofp_group_desc_stats_request.show(self)
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_request.__eq__(self, other) and
+                ofp_group_desc_stats_request.__eq__(self, other))
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class group_desc_stats_reply(ofp_stats_reply):
+    """
+    Wrapper class for group_desc stats reply
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_reply.__init__(self)
+        self.header.type = OFPT_STATS_REPLY
+        self.type = OFPST_GROUP_DESC
+        # stats: Array of type group_desc_stats_entry
+        self.stats = []
+
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_reply.pack(self)
+        for obj in self.stats:
+            packed += obj.pack()
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_reply.unpack(self, binary_string)
+        dummy = group_desc_stats_entry()
+        while len(binary_string) >= len(dummy):
+            obj = group_desc_stats_entry()
+            binary_string = obj.unpack(binary_string)
+            self.stats.append(obj)
+        if len(binary_string) != 0:
+            print "ERROR unpacking group_desc stats string: extra bytes"
+        return binary_string
+
+    def __len__(self):
+        length = len(self.header) + OFP_STATS_REPLY_BYTES
+        for obj in self.stats:
+            length += len(obj)
+        return length
+
+    def show(self, prefix=''):
+        outstr = prefix + "group_desc_stats_reply\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_reply.show(self)
+        outstr += prefix + "Stats array of length " + str(len(self.stats)) + '\n'
+        for obj in self.stats:
+            outstr += obj.show()
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_reply.__eq__(self, other) and
+                self.stats == other.stats)
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class table_stats_request(ofp_stats_request, ofp_table_stats_request):
+    """
+    Wrapper class for table stats request message
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_request.__init__(self)
+        ofp_table_stats_request.__init__(self)
+        self.header.type = OFPT_STATS_REQUEST
+        self.type = OFPST_TABLE
+
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_request.pack(self)
+        packed += ofp_table_stats_request.pack(self)
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_request.unpack(self, binary_string)
+        binary_string = ofp_table_stats_request.unpack(self, binary_string)
+        if len(binary_string) != 0:
+            print "ERROR unpacking table: extra data"
+        return binary_string
+
+    def __len__(self):
+        return len(self.header) + OFP_STATS_REQUEST_BYTES + \
+               OFP_TABLE_STATS_REQUEST_BYTES
+
+    def show(self, prefix=''):
+        outstr = prefix + "table_stats_request\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_request.show(self)
+        outstr += ofp_table_stats_request.show(self)
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_request.__eq__(self, other) and
+                ofp_table_stats_request.__eq__(self, other))
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+class table_stats_reply(ofp_stats_reply):
+    """
+    Wrapper class for table stats reply
+    """
+    def __init__(self):
+        self.header = ofp_header()
+        ofp_stats_reply.__init__(self)
+        self.header.type = OFPT_STATS_REPLY
+        self.type = OFPST_TABLE
+        # stats: Array of type table_stats_entry
+        self.stats = []
+
+    def pack(self, assertstruct=True):
+        self.header.length = len(self)
+        packed = self.header.pack()
+        packed += ofp_stats_reply.pack(self)
+        for obj in self.stats:
+            packed += obj.pack()
+        return packed
+
+    def unpack(self, binary_string):
+        binary_string = self.header.unpack(binary_string)
+        binary_string = ofp_stats_reply.unpack(self, binary_string)
+        dummy = table_stats_entry()
+        while len(binary_string) >= len(dummy):
+            obj = table_stats_entry()
+            binary_string = obj.unpack(binary_string)
+            self.stats.append(obj)
+        if len(binary_string) != 0:
+            print "ERROR unpacking table stats string: extra bytes"
+        return binary_string
+
+    def __len__(self):
+        length = len(self.header) + OFP_STATS_REPLY_BYTES
+        for obj in self.stats:
+            length += len(obj)
+        return length
+
+    def show(self, prefix=''):
+        outstr = prefix + "table_stats_reply\n"
+        outstr += prefix + "ofp header:\n"
+        outstr += self.header.show(prefix + '  ')
+        outstr += ofp_stats_reply.show(self)
+        outstr += prefix + "Stats array of length " + str(len(self.stats)) + '\n'
+        for obj in self.stats:
+            outstr += obj.show()
+        return outstr
+
+    def __eq__(self, other):
+        if type(self) != type(other): return False
+        return (self.header == other.header and
+                ofp_stats_reply.__eq__(self, other) and
+                self.stats == other.stats)
+
+    def __ne__(self, other): return not self.__eq__(other)
+
+
+# @todo Add buckets to group and group_desc stats obejcts"
+message_type_list = (
+    aggregate_stats_reply,
+    aggregate_stats_request,
+    bad_action_error_msg,
+    bad_request_error_msg,
+    barrier_reply,
+    barrier_request,
+    desc_stats_reply,
+    desc_stats_request,
+    echo_reply,
+    echo_request,
+    error,
+    experimenter,
+    features_reply,
+    features_request,
+    flow_mod,
+    flow_mod_failed_error_msg,
+    flow_removed,
+    flow_stats_reply,
+    flow_stats_request,
+    get_config_reply,
+    get_config_request,
+    group_desc_stats_request,
+    group_desc_stats_reply,
+    group_stats_request,
+    group_stats_reply,
+    group_mod,
+    group_mod_failed_error_msg,
+    hello,
+    hello_failed_error_msg,
+    packet_in,
+    packet_out,
+    port_mod,
+    port_mod_failed_error_msg,
+    port_stats_reply,
+    port_stats_request,
+    port_status,
+    queue_get_config_reply,
+    queue_get_config_request,
+    queue_op_failed_error_msg,
+    queue_stats_reply,
+    queue_stats_request,
+    set_config,
+    switch_config_failed_error_msg,
+    table_mod,
+    table_mod_failed_error_msg,
+    table_stats_reply,
+    table_stats_request,
+    )
+