611 lines
26 KiB
Python
611 lines
26 KiB
Python
# Copyright (C) 2013 Nippon Telegraph and Telephone Corporation.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
|
# implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
import struct
|
|
from . import packet_base
|
|
from os_ken.lib import addrconv
|
|
|
|
# Slow Protocol Multicast destination
|
|
SLOW_PROTOCOL_MULTICAST = '01:80:c2:00:00:02'
|
|
|
|
# Slow Protocol SubType
|
|
SLOW_SUBTYPE_LACP = 0x01
|
|
SLOW_SUBTYPE_MARKER = 0x02
|
|
SLOW_SUBTYPE_OAM = 0x03
|
|
SLOW_SUBTYPE_OSSP = 0x0a
|
|
|
|
|
|
class slow(packet_base.PacketBase):
|
|
"""Slow Protocol header decoder class.
|
|
This class has only the parser method.
|
|
|
|
http://standards.ieee.org/getieee802/download/802.3-2012_section5.pdf
|
|
|
|
Slow Protocols Subtypes
|
|
|
|
+---------------+--------------------------------------------------+
|
|
| Subtype Value | Protocol Name |
|
|
+===============+==================================================+
|
|
| 0 | Unused - Illegal Value |
|
|
+---------------+--------------------------------------------------+
|
|
| 1 | Link Aggregation Control Protocol(LACP) |
|
|
+---------------+--------------------------------------------------+
|
|
| 2 | Link Aggregation - Marker Protocol |
|
|
+---------------+--------------------------------------------------+
|
|
| 3 | Operations, Administration, and Maintenance(OAM) |
|
|
+---------------+--------------------------------------------------+
|
|
| 4 - 9 | Reserved for future use |
|
|
+---------------+--------------------------------------------------+
|
|
| 10 | Organization Specific Slow Protocol(OSSP) |
|
|
+---------------+--------------------------------------------------+
|
|
| 11 - 255 | Unused - Illegal values |
|
|
+---------------+--------------------------------------------------+
|
|
"""
|
|
_PACK_STR = '!B'
|
|
|
|
@classmethod
|
|
def parser(cls, buf):
|
|
(subtype, ) = struct.unpack_from(cls._PACK_STR, buf)
|
|
switch = {
|
|
SLOW_SUBTYPE_LACP: lacp,
|
|
# TODO: make parsers of other subtypes.
|
|
SLOW_SUBTYPE_MARKER: None,
|
|
SLOW_SUBTYPE_OAM: None,
|
|
SLOW_SUBTYPE_OSSP: None,
|
|
}
|
|
cls_ = switch.get(subtype)
|
|
if cls_:
|
|
return cls_.parser(buf)
|
|
else:
|
|
return None, None, buf
|
|
|
|
|
|
class lacp(packet_base.PacketBase):
|
|
"""Link Aggregation Control Protocol(LACP, IEEE 802.1AX)
|
|
header encoder/decoder class.
|
|
|
|
http://standards.ieee.org/getieee802/download/802.1AX-2008.pdf
|
|
|
|
LACPDU format
|
|
|
|
+------------------------------------------------+--------+
|
|
| LACPDU structure | Octets |
|
|
+================================================+========+
|
|
| Subtype = LACP | 1 |
|
|
+------------------------------------------------+--------+
|
|
| Version Number | 1 |
|
|
+------------+-----------------------------------+--------+
|
|
| TLV | TLV_type = Actor Information | 1 |
|
|
| Actor | | |
|
|
+------------+-----------------------------------+--------+
|
|
| | Actor_Information_Length = 20 | 1 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Actor_System_Priority | 2 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Actor_System | 6 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Actor_Key | 2 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Actor_Port_Priority | 2 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Actor_Port | 2 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Actor_State | 1 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Reserved | 3 |
|
|
+------------+-----------------------------------+--------+
|
|
| TLV | TLV_type = Partner Information | 1 |
|
|
| Partner | | |
|
|
+------------+-----------------------------------+--------+
|
|
| | Partner_Information_Length = 20 | 1 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Partner_System_Priority | 2 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Partner_System | 6 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Partner_Key | 2 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Partner_Port_Priority | 2 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Partner_Port | 2 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Partner_State | 1 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Reserved | 3 |
|
|
+------------+-----------------------------------+--------+
|
|
| TLV | TLV_type = Collector Information | 1 |
|
|
| Collector | | |
|
|
+------------+-----------------------------------+--------+
|
|
| | Collector_Information_Length = 16 | 1 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Collector_Max_Delay | 2 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Reserved | 12 |
|
|
+------------+-----------------------------------+--------+
|
|
| TLV | TLV_type = Terminator | 1 |
|
|
| Terminator | | |
|
|
+------------+-----------------------------------+--------+
|
|
| | Terminator_Length = 0 | 1 |
|
|
+------------+-----------------------------------+--------+
|
|
| | Reserved | 50 |
|
|
+------------+-----------------------------------+--------+
|
|
|
|
|
|
Terminator information uses a length value of 0 (0x00).
|
|
|
|
NOTE--The use of a Terminator_Length of 0 is intentional.
|
|
In TLV encoding schemes it is common practice
|
|
for the terminator encoding to be 0 both
|
|
for the type and the length.
|
|
|
|
Actor_State and Partner_State encoded as individual bits within
|
|
a single octet as follows:
|
|
|
|
+------+------+------+------+------+------+------+------+
|
|
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|
|
+======+======+======+======+======+======+======+======+
|
|
| EXPR | DFLT | DIST | CLCT | SYNC | AGGR | TMO | ACT |
|
|
+------+------+------+------+------+------+------+------+
|
|
|
|
ACT
|
|
bit 0.
|
|
about the activity control value with regard to this link.
|
|
TMO
|
|
bit 1.
|
|
about the timeout control value with regard to this link.
|
|
AGGR
|
|
bit 2.
|
|
about how the system regards this link from the point of view
|
|
of the aggregation.
|
|
SYNC
|
|
bit 3.
|
|
about how the system regards this link from the point of view
|
|
of the synchronization.
|
|
CLCT
|
|
bit 4.
|
|
about collecting of incoming frames.
|
|
DIST
|
|
bit 5.
|
|
about distributing of outgoing frames.
|
|
DFLT
|
|
bit 6.
|
|
about the opposite system information which the system use.
|
|
EXPR
|
|
bit 7.
|
|
about the expire state of the system.
|
|
|
|
An instance has the following attributes at least.
|
|
Most of them are same to the on-wire counterparts but in host byte
|
|
order.
|
|
__init__ takes the corresponding args in this order.
|
|
|
|
.. tabularcolumns:: |l|L|
|
|
|
|
=============================== ====================================
|
|
Attribute Description
|
|
=============================== ====================================
|
|
version LACP version. This parameter must be
|
|
set to LACP_VERSION_NUMBER(i.e. 1).
|
|
|
|
actor_system_priority The priority assigned to this
|
|
System.
|
|
|
|
actor_system The Actor's System ID, encoded as
|
|
a MAC address.
|
|
|
|
actor_key The operational Key value assigned
|
|
to the port by the Actor.
|
|
|
|
actor_port_priority The priority assigned to this port.
|
|
|
|
actor_port The port number assigned to the
|
|
port by the Actor.
|
|
|
|
actor_state_activity .. _lacp_activity:
|
|
|
|
about the activity control value
|
|
with regard to this link.
|
|
|
|
LACP_STATE_ACTIVE(1)
|
|
|
|
LACP_STATE_PASSIVE(0)
|
|
|
|
actor_state_timeout .. _lacp_timeout:
|
|
|
|
about the timeout control value
|
|
with regard to this link.
|
|
|
|
LACP_STATE_SHORT_TIMEOUT(1)
|
|
|
|
LACP_STATE_LONG_TIMEOUT(0)
|
|
|
|
actor_state_aggregation .. _lacp_aggregation:
|
|
|
|
about how the system regards this
|
|
link from the point of view of the
|
|
aggregation.
|
|
|
|
LACP_STATE_AGGREGATEABLE(1)
|
|
|
|
LACP_STATE_INDIVIDUAL(0)
|
|
|
|
actor_state_synchronization .. _lacp_synchronization:
|
|
|
|
about how the system regards this
|
|
link from the point of view of the
|
|
synchronization.
|
|
|
|
LACP_STATE_IN_SYNC(1)
|
|
|
|
LACP_STATE_OUT_OF_SYNC(0)
|
|
|
|
actor_state_collecting .. _lacp_collecting:
|
|
|
|
about collecting of incoming frames.
|
|
|
|
LACP_STATE_COLLECTING_ENABLED(1)
|
|
|
|
LACP_STATE_COLLECTING_DISABLED(0)
|
|
|
|
actor_state_distributing .. _lacp_distributing:
|
|
|
|
about distributing of outgoing frames.
|
|
|
|
LACP_STATE_DISTRIBUTING_ENABLED(1)
|
|
|
|
LACP_STATE_DISTRIBUTING_DISABLED(0)
|
|
|
|
actor_state_defaulted .. _lacp_defaulted:
|
|
|
|
about the Partner information
|
|
which the the Actor use.
|
|
|
|
LACP_STATE_DEFAULTED_PARTNER(1)
|
|
|
|
LACP_STATE_OPERATIONAL_PARTNER(0)
|
|
|
|
actor_state_expired .. _lacp_expired:
|
|
|
|
about the state of the Actor.
|
|
|
|
LACP_STATE_EXPIRED(1)
|
|
|
|
LACP_STATE_NOT_EXPIRED(0)
|
|
|
|
partner_system_priority The priority assigned to the
|
|
Partner System.
|
|
|
|
partner_system The Partner's System ID, encoded
|
|
as a MAC address.
|
|
|
|
partner_key The operational Key value assigned
|
|
to the port by the Partner.
|
|
|
|
partner_port_priority The priority assigned to this port
|
|
by the Partner.
|
|
|
|
partner_port The port number assigned to the
|
|
port by the Partner.
|
|
|
|
partner_state_activity See :ref:`actor_state_activity\
|
|
<lacp_activity>`.
|
|
|
|
partner_state_timeout See :ref:`actor_state_timeout\
|
|
<lacp_timeout>`.
|
|
|
|
partner_state_aggregation See :ref:`actor_state_aggregation\
|
|
<lacp_aggregation>`.
|
|
|
|
partner_state_synchronization See
|
|
:ref:`actor_state_synchronization\
|
|
<lacp_synchronization>`.
|
|
|
|
partner_state_collecting See :ref:`actor_state_collecting\
|
|
<lacp_collecting>`.
|
|
|
|
partner_state_distributing See :ref:`actor_state_distributing\
|
|
<lacp_distributing>`.
|
|
|
|
partner_state_defaulted See :ref:`actor_state_defaulted\
|
|
<lacp_defaulted>`.
|
|
|
|
partner_state_expired See :ref:`actor_state_expired\
|
|
<lacp_expired>`.
|
|
|
|
collector_max_delay the maximum time that the Frame
|
|
Collector may delay.
|
|
=============================== ====================================
|
|
|
|
"""
|
|
LACP_VERSION_NUMBER = 1
|
|
|
|
# LACP TLV type
|
|
LACP_TLV_TYPE_ACTOR = 1
|
|
LACP_TLV_TYPE_PARTNER = 2
|
|
LACP_TLV_TYPE_COLLECTOR = 3
|
|
LACP_TLV_TYPE_TERMINATOR = 0
|
|
|
|
# LACP state(LACP_Activity)
|
|
LACP_STATE_ACTIVE = 1
|
|
LACP_STATE_PASSIVE = 0
|
|
# LACP state(LACP_Timeout)
|
|
LACP_STATE_SHORT_TIMEOUT = 1
|
|
LACP_STATE_LONG_TIMEOUT = 0
|
|
# LACP state(Aggregation)
|
|
LACP_STATE_AGGREGATEABLE = 1
|
|
LACP_STATE_INDIVIDUAL = 0
|
|
# LACP state(Synchronization)
|
|
LACP_STATE_IN_SYNC = 1
|
|
LACP_STATE_OUT_OF_SYNC = 0
|
|
# LACP state(Collecting)
|
|
LACP_STATE_COLLECTING_ENABLED = 1
|
|
LACP_STATE_COLELCTING_DISABLED = 0
|
|
# LACP state(Distributing)
|
|
LACP_STATE_DISTRIBUTING_ENABLED = 1
|
|
LACP_STATE_DISTRIBUTING_DISABLED = 0
|
|
# LACP state(Defaulted)
|
|
LACP_STATE_DEFAULED_PARTNER = 1
|
|
LACP_STATE_OPERATIONAL_PARTNER = 0
|
|
# LACP state(Expired)
|
|
LACP_STATE_EXPIRED = 1
|
|
LACP_STATE_NOT_EXPIRED = 0
|
|
|
|
# The number of seconds between periodic transmissions using
|
|
# Short Timeouts.
|
|
FAST_PERIODIC_TIME = 1
|
|
# The number of seconds between periodic transmissions using
|
|
# Long Timeouts.
|
|
SLOW_PERIODIC_TIME = 30
|
|
# The number of seconds before invalidating received LACPDU
|
|
# information when using Short Timeouts(3 x Fast_Periodic_Time).
|
|
SHORT_TIMEOUT_TIME = 3 * FAST_PERIODIC_TIME
|
|
# The number of seconds before invalidating received LACPDU
|
|
# information when using Long Timeouts (3 x Slow_Periodic_Time).
|
|
LONG_TIMEOUT_TIME = 3 * SLOW_PERIODIC_TIME
|
|
|
|
_HLEN_PACK_STR = '!BB'
|
|
_HLEN_PACK_LEN = struct.calcsize(_HLEN_PACK_STR)
|
|
_ACTPRT_INFO_PACK_STR = '!BBH6sHHHB3x'
|
|
_ACTPRT_INFO_PACK_LEN = struct.calcsize(_ACTPRT_INFO_PACK_STR)
|
|
_COL_INFO_PACK_STR = '!BBH12x'
|
|
_COL_INFO_PACK_LEN = struct.calcsize(_COL_INFO_PACK_STR)
|
|
_TRM_PACK_STR = '!BB50x'
|
|
_TRM_PACK_LEN = struct.calcsize(_TRM_PACK_STR)
|
|
_ALL_PACK_LEN = _HLEN_PACK_LEN + _ACTPRT_INFO_PACK_LEN * 2 + \
|
|
_COL_INFO_PACK_LEN + _TRM_PACK_LEN
|
|
|
|
_MIN_LEN = _ALL_PACK_LEN
|
|
|
|
_TYPE = {
|
|
'ascii': [
|
|
'actor_system', 'partner_system'
|
|
]
|
|
}
|
|
|
|
def __init__(self, version=LACP_VERSION_NUMBER,
|
|
actor_system_priority=0,
|
|
actor_system='00:00:00:00:00:00',
|
|
actor_key=0, actor_port_priority=0, actor_port=0,
|
|
actor_state_activity=0, actor_state_timeout=0,
|
|
actor_state_aggregation=0,
|
|
actor_state_synchronization=0,
|
|
actor_state_collecting=0, actor_state_distributing=0,
|
|
actor_state_defaulted=0, actor_state_expired=0,
|
|
partner_system_priority=0,
|
|
partner_system='00:00:00:00:00:00',
|
|
partner_key=0, partner_port_priority=0, partner_port=0,
|
|
partner_state_activity=0, partner_state_timeout=0,
|
|
partner_state_aggregation=0,
|
|
partner_state_synchronization=0,
|
|
partner_state_collecting=0,
|
|
partner_state_distributing=0,
|
|
partner_state_defaulted=0, partner_state_expired=0,
|
|
collector_max_delay=0):
|
|
super(lacp, self).__init__()
|
|
# parameter check
|
|
assert (1 == actor_state_activity | 1)
|
|
assert (1 == actor_state_timeout | 1)
|
|
assert (1 == actor_state_aggregation | 1)
|
|
assert (1 == actor_state_synchronization | 1)
|
|
assert (1 == actor_state_collecting | 1)
|
|
assert (1 == actor_state_distributing | 1)
|
|
assert (1 == actor_state_defaulted | 1)
|
|
assert (1 == actor_state_expired | 1)
|
|
assert (1 == partner_state_activity | 1)
|
|
assert (1 == partner_state_timeout | 1)
|
|
assert (1 == partner_state_aggregation | 1)
|
|
assert (1 == partner_state_synchronization | 1)
|
|
assert (1 == partner_state_collecting | 1)
|
|
assert (1 == partner_state_distributing | 1)
|
|
assert (1 == partner_state_defaulted | 1)
|
|
assert (1 == partner_state_expired | 1)
|
|
# ------------------------------
|
|
# Header
|
|
# ------------------------------
|
|
self._subtype = SLOW_SUBTYPE_LACP
|
|
self.version = version
|
|
# ------------------------------
|
|
# Actor Information
|
|
# ------------------------------
|
|
self._actor_tag = self.LACP_TLV_TYPE_ACTOR
|
|
self._actor_length = self._ACTPRT_INFO_PACK_LEN
|
|
self.actor_system_priority = actor_system_priority
|
|
self.actor_system = actor_system
|
|
self.actor_key = actor_key
|
|
self.actor_port_priority = actor_port_priority
|
|
self.actor_port = actor_port
|
|
self.actor_state_activity = actor_state_activity
|
|
self.actor_state_timeout = actor_state_timeout
|
|
self.actor_state_aggregation = actor_state_aggregation
|
|
self.actor_state_synchronization = actor_state_synchronization
|
|
self.actor_state_collecting = actor_state_collecting
|
|
self.actor_state_distributing = actor_state_distributing
|
|
self.actor_state_defaulted = actor_state_defaulted
|
|
self.actor_state_expired = actor_state_expired
|
|
self._actor_state = (
|
|
(self.actor_state_activity << 0) |
|
|
(self.actor_state_timeout << 1) |
|
|
(self.actor_state_aggregation << 2) |
|
|
(self.actor_state_synchronization << 3) |
|
|
(self.actor_state_collecting << 4) |
|
|
(self.actor_state_distributing << 5) |
|
|
(self.actor_state_defaulted << 6) |
|
|
(self.actor_state_expired << 7))
|
|
# ------------------------------
|
|
# Partner Information
|
|
# ------------------------------
|
|
self._partner_tag = self.LACP_TLV_TYPE_PARTNER
|
|
self._partner_length = self._ACTPRT_INFO_PACK_LEN
|
|
self.partner_system_priority = partner_system_priority
|
|
self.partner_system = partner_system
|
|
self.partner_key = partner_key
|
|
self.partner_port_priority = partner_port_priority
|
|
self.partner_port = partner_port
|
|
self.partner_state_activity = partner_state_activity
|
|
self.partner_state_timeout = partner_state_timeout
|
|
self.partner_state_aggregation = partner_state_aggregation
|
|
self.partner_state_synchronization = \
|
|
partner_state_synchronization
|
|
self.partner_state_collecting = partner_state_collecting
|
|
self.partner_state_distributing = partner_state_distributing
|
|
self.partner_state_defaulted = partner_state_defaulted
|
|
self.partner_state_expired = partner_state_expired
|
|
self._partner_state = (
|
|
(self.partner_state_activity << 0) |
|
|
(self.partner_state_timeout << 1) |
|
|
(self.partner_state_aggregation << 2) |
|
|
(self.partner_state_synchronization << 3) |
|
|
(self.partner_state_collecting << 4) |
|
|
(self.partner_state_distributing << 5) |
|
|
(self.partner_state_defaulted << 6) |
|
|
(self.partner_state_expired << 7))
|
|
# ------------------------------
|
|
# Collector Information
|
|
# ------------------------------
|
|
self._collector_tag = self.LACP_TLV_TYPE_COLLECTOR
|
|
self._collector_length = self._COL_INFO_PACK_LEN
|
|
self.collector_max_delay = collector_max_delay
|
|
# ------------------------------
|
|
# Terminator
|
|
# ------------------------------
|
|
self._terminator_tag = self.LACP_TLV_TYPE_TERMINATOR
|
|
self._terminator_length = 0
|
|
|
|
@classmethod
|
|
def parser(cls, buf):
|
|
assert cls._ALL_PACK_LEN == len(buf)
|
|
offset = 0
|
|
# ------------------------------
|
|
# Header
|
|
# ------------------------------
|
|
(subtype, version
|
|
) = struct.unpack_from(cls._HLEN_PACK_STR, buf, offset)
|
|
assert SLOW_SUBTYPE_LACP == subtype
|
|
assert cls.LACP_VERSION_NUMBER == version
|
|
offset += cls._HLEN_PACK_LEN
|
|
# ------------------------------
|
|
# Actor Information
|
|
# ------------------------------
|
|
(actor_tag, actor_length, actor_system_priority, actor_system,
|
|
actor_key, actor_port_priority, actor_port, actor_state
|
|
) = struct.unpack_from(cls._ACTPRT_INFO_PACK_STR, buf, offset)
|
|
assert cls.LACP_TLV_TYPE_ACTOR == actor_tag
|
|
assert cls._ACTPRT_INFO_PACK_LEN == actor_length
|
|
offset += cls._ACTPRT_INFO_PACK_LEN
|
|
actor_state_activity = (actor_state >> 0) & 1
|
|
actor_state_timeout = (actor_state >> 1) & 1
|
|
actor_state_aggregation = (actor_state >> 2) & 1
|
|
actor_state_synchronization = (actor_state >> 3) & 1
|
|
actor_state_collecting = (actor_state >> 4) & 1
|
|
actor_state_distributing = (actor_state >> 5) & 1
|
|
actor_state_defaulted = (actor_state >> 6) & 1
|
|
actor_state_expired = (actor_state >> 7) & 1
|
|
# ------------------------------
|
|
# Partner Information
|
|
# ------------------------------
|
|
(partner_tag, partner_length, partner_system_priority,
|
|
partner_system, partner_key, partner_port_priority,
|
|
partner_port, partner_state
|
|
) = struct.unpack_from(cls._ACTPRT_INFO_PACK_STR, buf, offset)
|
|
assert cls.LACP_TLV_TYPE_PARTNER == partner_tag
|
|
assert cls._ACTPRT_INFO_PACK_LEN == partner_length
|
|
offset += cls._ACTPRT_INFO_PACK_LEN
|
|
partner_state_activity = (partner_state >> 0) & 1
|
|
partner_state_timeout = (partner_state >> 1) & 1
|
|
partner_state_aggregation = (partner_state >> 2) & 1
|
|
partner_state_synchronization = (partner_state >> 3) & 1
|
|
partner_state_collecting = (partner_state >> 4) & 1
|
|
partner_state_distributing = (partner_state >> 5) & 1
|
|
partner_state_defaulted = (partner_state >> 6) & 1
|
|
partner_state_expired = (partner_state >> 7) & 1
|
|
# ------------------------------
|
|
# Collector Information
|
|
# ------------------------------
|
|
(collector_tag, collector_length, collector_max_delay
|
|
) = struct.unpack_from(cls._COL_INFO_PACK_STR, buf, offset)
|
|
assert cls.LACP_TLV_TYPE_COLLECTOR == collector_tag
|
|
assert cls._COL_INFO_PACK_LEN == collector_length
|
|
offset += cls._COL_INFO_PACK_LEN
|
|
# ------------------------------
|
|
# Terminator Information
|
|
# ------------------------------
|
|
(terminator_tag, terminator_length
|
|
) = struct.unpack_from(cls._TRM_PACK_STR, buf, offset)
|
|
assert cls.LACP_TLV_TYPE_TERMINATOR == terminator_tag
|
|
assert 0 == terminator_length
|
|
return cls(version,
|
|
actor_system_priority,
|
|
addrconv.mac.bin_to_text(actor_system),
|
|
actor_key, actor_port_priority,
|
|
actor_port, actor_state_activity,
|
|
actor_state_timeout, actor_state_aggregation,
|
|
actor_state_synchronization, actor_state_collecting,
|
|
actor_state_distributing, actor_state_defaulted,
|
|
actor_state_expired, partner_system_priority,
|
|
addrconv.mac.bin_to_text(partner_system),
|
|
partner_key, partner_port_priority,
|
|
partner_port, partner_state_activity,
|
|
partner_state_timeout, partner_state_aggregation,
|
|
partner_state_synchronization,
|
|
partner_state_collecting, partner_state_distributing,
|
|
partner_state_defaulted, partner_state_expired,
|
|
collector_max_delay), None, buf[lacp._ALL_PACK_LEN:]
|
|
|
|
def serialize(self, payload, prev):
|
|
header = struct.pack(self._HLEN_PACK_STR, self._subtype,
|
|
self.version)
|
|
actor = struct.pack(self._ACTPRT_INFO_PACK_STR,
|
|
self._actor_tag, self._actor_length,
|
|
self.actor_system_priority,
|
|
addrconv.mac.text_to_bin(self.actor_system),
|
|
self.actor_key,
|
|
self.actor_port_priority, self.actor_port,
|
|
self._actor_state)
|
|
partner = struct.pack(self._ACTPRT_INFO_PACK_STR,
|
|
self._partner_tag, self._partner_length,
|
|
self.partner_system_priority,
|
|
addrconv.mac.text_to_bin(self.partner_system),
|
|
self.partner_key,
|
|
self.partner_port_priority,
|
|
self.partner_port, self._partner_state)
|
|
collector = struct.pack(self._COL_INFO_PACK_STR,
|
|
self._collector_tag,
|
|
self._collector_length,
|
|
self.collector_max_delay)
|
|
terminator = struct.pack(self._TRM_PACK_STR,
|
|
self._terminator_tag,
|
|
self._terminator_length)
|
|
return header + actor + partner + collector + terminator
|