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# encoding: utf-8
"""
srlg.py
Created by Evelio Vila on 2016-12-01.
Copyright (c) 2014-2017 Exa Networks. All rights reserved.
from struct import unpack
from exabgp.util import split
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 |
# | Shared Risk Link Group Value |
# // ............ //
# https://tools.ietf.org/html/rfc7752#section-3.3.2.5 Shared Risk Link Group TLV
@LinkState.register()
class Srlg(BaseLS):
TLV = 1096
REPR = 'link SRLG values'
JSON = 'shared-risk-link-groups'
@classmethod
def unpack(cls, data, length):
if len(data) % 4:
raise Notify(3, 5, "Unable to decode SRLG")
return cls([unpack('!L', _)[0] for _ in split(data, 4)])
Exa-Networks /
exabgp
