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"""The controller has requested to be notified when flows time out.""" |
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# System imports |
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from enum import IntEnum |
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from pyof.foundation.base import GenericMessage |
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from pyof.foundation.basic_types import UBInt8, UBInt16, UBInt32, UBInt64 |
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# Local source tree imports |
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from pyof.v0x04.common.flow_match import Match |
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from pyof.v0x04.common.header import Header, Type |
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__all__ = ('FlowRemoved', 'FlowRemovedReason') |
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# Enums |
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class FlowRemovedReason(IntEnum): |
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"""Why the flow was removed.""" |
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#: Flow idle time exceeded idle_timeout |
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OFPRR_IDLE_TIMEOUT = 0 |
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#: Time exceeded hard_timeout |
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OFPRR_HARD_TIMEOUT = 1 |
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#: Evicted by a DELETE flow mod |
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OFPRR_DELETE = 2 |
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#: Group was removed. |
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OFPRR_GROUP_DELETE = 3 |
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# Classes |
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View Code Duplication |
class FlowRemoved(GenericMessage): |
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"""Flow removed (datapath -> controller). |
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If the controller has requested to be notified when flow entries time out |
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or are deleted from tables, the datapath does this with the |
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OFPT_FLOW_REMOVED message. |
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""" |
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#: :class:`~pyof.v0x04.common.header.Header`: OpenFlow Header |
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header = Header(message_type=Type.OFPT_FLOW_REMOVED) |
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#: Opaque controller-issued identifier. |
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cookie = UBInt64() |
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#: Priority level of flow entry. |
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priority = UBInt16() |
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#: One of OFPRR_*. |
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reason = UBInt8(enum_ref=FlowRemovedReason) |
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#: ID of the table |
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table_id = UBInt8() |
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#: Time flow was alive in seconds. |
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duration_sec = UBInt32() |
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#: Time flow was alive in nanoseconds beyond duration_sec. |
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duration_nsec = UBInt32() |
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#: Idle timeout from original flow mod. |
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idle_timeout = UBInt16() |
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#: Hard timeout from original flow mod. |
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hard_timeout = UBInt16() |
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packet_count = UBInt64() |
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byte_count = UBInt64() |
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#: Description of fields. Variable size. |
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#: :class:`~pyof.v0x04.common.flow_match.Match` |
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match = Match() |
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def __init__(self, xid=None, cookie=None, priority=None, reason=None, |
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table_id=None, duration_sec=None, duration_nsec=None, |
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idle_timeout=None, hard_timeout=None, packet_count=None, |
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byte_count=None, match=None): |
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"""Assign parameters to object attributes. |
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Args: |
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xid (int): OpenFlow Header's xid. |
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cookie (int): Opaque controller-issued identifier. |
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priority (int): Priority level of flow entry. |
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reason (~pyof.v0x04.asynchronous.flow_removed.FlowRemovedReason): |
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Why the flow was removed. |
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table_id (int): ID of the table. |
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duration_sec (int): Time the flow was alive in seconds. |
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duration_nsec (int): Time the flow was alive in nanoseconds in |
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addition to duration_sec. |
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idle_timeout (int): Idle timeout from original flow mod. |
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hard_timeout (int): Hard timeout from original flow mod. |
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packet_count (int): Number of packets. |
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byte_count (int): Byte count. |
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match (~pyof.v0x04.common.flow_match.Match): Fields' description. |
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""" |
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super().__init__(xid) |
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self.cookie = cookie |
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self.priority = priority |
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self.reason = reason |
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self.table_id = table_id |
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self.duration_sec = duration_sec |
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self.duration_nsec = duration_nsec |
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self.idle_timeout = idle_timeout |
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self.hard_timeout = hard_timeout |
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self.packet_count = packet_count |
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self.byte_count = byte_count |
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self.match = match |
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kytos /
python-openflow
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