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# encoding: utf-8
"""
igptags.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
# The IGP Route Tag TLV carries original IGP Tags (IS-IS [RFC5130] or
# OSPF) of the prefix and is encoded as follows:
#
# 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 |
# // Route Tags (one or more) //
# https://tools.ietf.org/html/rfc7752#section-3.3.3.2
@LINKSTATE.register()
class IgpTags(object):
TLV = 1153
def __init__(self, igptags):
self.igptags = igptags
def __repr__(self):
return "IGP Route Tags: %s" % (self.igptags)
@classmethod
def unpack(cls, data, length):
return cls([unpack("!L", _)[0] for _ in split(data, 4)])
split
def json(self, compact=None):
return '"igp-route-tags": %s' % self.igptags