exabgp.bgp.message.update.attribute.bgpls.link.opaque

Complexity

Total Complexity

1

Size/Duplication

Total Lines	40
Duplicated Lines	0 %

Importance

Changes

0

1 Method

Rating	Name	Duplication	Size	Complexity
A	LinkOpaque.unpack()	0	4	1

# encoding: utf-8
"""
opaque.py

Created by Evelio Vila on 2016-12-01.
Copyright (c) 2014-2017 Exa Networks. All rights reserved.
"""

from struct import pack
from struct import unpack

from exabgp.bgp.message.notification import Notify

from exabgp.bgp.message.update.attribute.bgpls.linkstate import LinkState
from exabgp.bgp.message.update.attribute.bgpls.linkstate import BaseLS

#
#     0                   1                   2                   3
#     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
#    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
#    |              Type             |             Length            |
#    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
#    //                     Opaque link attributes (variable)       //
#    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
#     https://tools.ietf.org/html/rfc7752#section-3.3.2.6 Opaque Link Attribute TLV
#
# This TLV is added here for completeness but we don't look into the TLV.


@LinkState.register()
class LinkOpaque(object):
    TLV = 1097
    REPR = 'Opaque Link attribute'
    REPR = 'opaque-link'

    @classmethod
    def unpack(cls, data, length):
        # XXX: cls.check(length)
        return cls(unpack("!%ds" % length, data[:length])[0])