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"""Defines Header classes and related items.""" |
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# System imports |
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from enum import IntEnum |
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# Local source tree imports |
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from pyof.foundation.base import GenericStruct |
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from pyof.foundation.basic_types import UBInt8, UBInt16, UBInt32 |
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from pyof.v0x04.common.constants import OFP_VERSION |
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# Third-party imports |
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__all__ = ('Header', 'Type') |
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# Enums |
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class Type(IntEnum): |
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"""Enumeration of Message Types.""" |
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# Symetric/Immutable messages |
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OFPT_HELLO = 0 |
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OFPT_ERROR = 1 |
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OFPT_ECHO_REQUEST = 2 |
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OFPT_ECHO_REPLY = 3 |
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OFPT_EXPERIMENTER = 4 |
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# Switch configuration messages |
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# Controller/Switch messages |
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OFPT_FEATURES_REQUEST = 5 |
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OFPT_FEATURES_REPLY = 6 |
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OFPT_GET_CONFIG_REQUEST = 7 |
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OFPT_GET_CONFIG_REPLY = 8 |
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OFPT_SET_CONFIG = 9 |
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# Async messages |
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OFPT_PACKET_IN = 10 |
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OFPT_FLOW_REMOVED = 11 |
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OFPT_PORT_STATUS = 12 |
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# Controller command messages |
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# Controller/Switch message |
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OFPT_PACKET_OUT = 13 |
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OFPT_FLOW_MOD = 14 |
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OFPT_GROUP_MOD = 15 |
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OFPT_PORT_MOD = 16 |
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OFPT_TABLE_MOD = 17 |
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# Multipart messages. |
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# Controller/Switch message |
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OFPT_MULTIPART_REQUEST = 18 |
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OFPT_MULTIPART_REPLY = 19 |
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# Barrier messages |
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# Controller/Switch message |
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OFPT_BARRIER_REQUEST = 20 |
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OFPT_BARRIER_REPLY = 21 |
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# Queue Configuration messages |
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# Controller/Switch message |
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OFPT_QUEUE_GET_CONFIG_REQUEST = 22 |
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OFPT_QUEUE_GET_CONFIG_REPLY = 23 |
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# Controller role change request message |
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# Controller/Switch message |
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OFPT_ROLE_REQUEST = 24 |
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OFPT_ROLE_REPLY = 25 |
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# Asynchronous message configuration |
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# Controller/Switch message |
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OFPT_GET_ASYNC_REQUEST = 26 |
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OFPT_GET_ASYNC_REPLY = 27 |
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OFPT_SET_ASYNC = 28 |
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# Meters and rate limiters configuration messages |
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# Controller/Switch message |
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OFPT_METER_MOD = 29 |
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# Classes |
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class Header(GenericStruct): |
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"""Representation of an OpenFlow message Header.""" |
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version = UBInt8(OFP_VERSION) |
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message_type = UBInt8(enum_ref=Type) |
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length = UBInt16() |
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xid = UBInt32() |
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def __init__(self, message_type=None, length=None, xid=None): |
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"""Create a Header with the optional parameters below. |
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Args: |
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message_type (~pyof.v0x04.common.header.Type): |
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One of the OFPT_* constants. |
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length (int): Length including this ofp_header. |
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xid (int): Transaction id associated with this packet. Replies use |
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the same id as was in the request to facilitate pairing. |
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""" |
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super().__init__() |
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self.message_type = message_type |
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self.length = length |
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self.xid = xid |
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def __repr__(self): |
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return (f"{type(self).__name__}(version={self.version}, " |
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f"xid={self.xid}, {self.message_type!s})") |
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kytos /
python-openflow
