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# encoding: utf-8 |
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""" |
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communities.py |
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Created by Thomas Mangin on 2009-11-05. |
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Copyright (c) 2009-2017 Exa Networks. All rights reserved. |
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License: 3-clause BSD. (See the COPYRIGHT file) |
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""" |
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from exabgp.util import ordinal |
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from exabgp.bgp.message.update.attribute.attribute import Attribute |
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from exabgp.bgp.message.update.attribute.community.extended.community import ExtendedCommunity |
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from exabgp.bgp.message.update.attribute.community.extended.community import ExtendedCommunityIPv6 |
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from exabgp.bgp.message.update.attribute.community.initial.communities import Communities |
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from exabgp.bgp.message.notification import Notify |
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# ===================================================== ExtendedCommunities (16) |
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# https://www.iana.org/assignments/bgp-extended-communities |
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@Attribute.register() |
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class ExtendedCommunities (Communities): |
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ID = Attribute.CODE.EXTENDED_COMMUNITY |
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@staticmethod |
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def unpack (data, negotiated): |
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communities = ExtendedCommunities() |
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while data: |
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if data and len(data) < 8: |
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raise Notify(3,1,'could not decode extended community %s' % str([hex(ordinal(_)) for _ in data])) |
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communities.add(ExtendedCommunity.unpack(data[:8],negotiated)) |
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data = data[8:] |
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return communities |
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# ===================================================== ExtendedCommunitiesIPv6 (25) |
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# RFC 5701 |
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@Attribute.register() |
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class ExtendedCommunitiesIPv6 (Communities): |
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ID = Attribute.CODE.IPV6_EXTENDED_COMMUNITY |
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@staticmethod |
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def unpack (data, negotiated): |
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communities = ExtendedCommunitiesIPv6() |
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while data: |
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if data and len(data) < 20: |
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raise Notify(3,1,'could not decode ipv6 extended community %s' % str([hex(ordinal(_)) for _ in data])) |
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communities.add(ExtendedCommunityIPv6.unpack(data[:20],negotiated)) |
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data = data[20:] |
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return communities |
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Exa-Networks /
exabgp
