exabgp.bgp.message.update.attribute.bgpls.prefix.prefixmetric

Complexity

Total Complexity

1

Size/Duplication

Total Lines	38
Duplicated Lines	0 %

Importance

Changes

0

1 Method

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

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

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

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            |
#     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
#     |                            Metric                             |
#     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
#     https://tools.ietf.org/html/rfc7752#section-3.3.3.4


@LinkState.register()
class PrefixMetric(BaseLS):
    TLV = 1155
    REPR = 'prefix_metric'
    JSON = 'prefix-metric'
    LEN = 4

    @classmethod
    def unpack(cls, data, length):
        cls.check(length)
        return cls(int(unpack("!L", data)[0]))