|
1
|
|
|
# encoding: utf-8 |
|
2
|
|
|
""" |
|
3
|
|
|
announce/label.py |
|
4
|
|
|
|
|
5
|
|
|
Created by Thomas Mangin on 2017-07-05. |
|
6
|
|
|
Copyright (c) 2009-2017 Exa Networks. All rights reserved. |
|
7
|
|
|
License: 3-clause BSD. (See the COPYRIGHT file) |
|
8
|
|
|
""" |
|
9
|
|
|
|
|
10
|
|
|
from exabgp.protocol.ip import NoNextHop |
|
11
|
|
|
|
|
12
|
|
|
from exabgp.rib.change import Change |
|
13
|
|
|
|
|
14
|
|
|
from exabgp.bgp.message import OUT |
|
15
|
|
|
|
|
16
|
|
|
from exabgp.protocol.family import AFI |
|
17
|
|
|
from exabgp.protocol.family import SAFI |
|
18
|
|
|
|
|
19
|
|
|
from exabgp.bgp.message.update.nlri.label import Label |
|
20
|
|
|
from exabgp.bgp.message.update.nlri.qualifier import Labels |
|
21
|
|
|
from exabgp.bgp.message.update.nlri.cidr import CIDR |
|
22
|
|
|
from exabgp.bgp.message.update.attribute import Attributes |
|
23
|
|
|
|
|
24
|
|
|
from exabgp.configuration.announce import ParseAnnounce |
|
25
|
|
|
from exabgp.configuration.announce.path import AnnouncePath |
|
26
|
|
|
|
|
27
|
|
|
from exabgp.configuration.static.parser import prefix |
|
28
|
|
|
from exabgp.configuration.static.mpls import label |
|
29
|
|
|
|
|
30
|
|
|
|
|
31
|
|
|
class AnnounceLabel (AnnouncePath): |
|
32
|
|
|
# put next-hop first as it is a requirement atm |
|
33
|
|
|
definition = [ |
|
34
|
|
|
'label <15 bits number>', |
|
35
|
|
|
] + AnnouncePath.definition |
|
36
|
|
|
|
|
37
|
|
|
syntax = \ |
|
38
|
|
|
'<safi> <ip>/<netmask> { ' \ |
|
39
|
|
|
'\n ' + ' ;\n '.join(definition) + '\n}' |
|
40
|
|
|
|
|
41
|
|
|
known = dict(AnnouncePath.known,**{ |
|
42
|
|
|
'label': label, |
|
43
|
|
|
}) |
|
44
|
|
|
|
|
45
|
|
|
action = dict(AnnouncePath.action,**{ |
|
46
|
|
|
'label': 'nlri-set', |
|
47
|
|
|
}) |
|
48
|
|
|
|
|
49
|
|
|
assign = dict(AnnouncePath.assign,**{ |
|
50
|
|
|
'label': 'labels', |
|
51
|
|
|
}) |
|
52
|
|
|
|
|
53
|
|
|
name = 'vpn' |
|
54
|
|
|
afi = None |
|
55
|
|
|
|
|
56
|
|
|
def __init__ (self, tokeniser, scope, error, logger): |
|
57
|
|
|
AnnouncePath.__init__(self,tokeniser,scope,error,logger) |
|
58
|
|
|
|
|
59
|
|
|
def clear (self): |
|
60
|
|
|
return True |
|
61
|
|
|
|
|
62
|
|
|
@staticmethod |
|
63
|
|
|
def check (change,afi): |
|
64
|
|
|
if not AnnouncePath.check(change,afi): |
|
65
|
|
|
return False |
|
66
|
|
|
|
|
67
|
|
|
if change.nlri.action == OUT.ANNOUNCE \ |
|
68
|
|
|
and change.nlri.has_label() \ |
|
69
|
|
|
and change.nlri.labels is Labels.NOLABEL: |
|
70
|
|
|
return False |
|
71
|
|
|
|
|
72
|
|
|
return True |
|
73
|
|
|
|
|
74
|
|
|
|
|
75
|
|
View Code Duplication |
def ip_label (tokeniser,afi,safi): |
|
|
|
|
|
|
76
|
|
|
action = OUT.ANNOUNCE if tokeniser.announce else OUT.WITHDRAW |
|
77
|
|
|
ipmask = prefix(tokeniser) |
|
78
|
|
|
|
|
79
|
|
|
nlri = Label(afi, safi, action) |
|
80
|
|
|
nlri.cidr = CIDR(ipmask.pack(),ipmask.mask) |
|
81
|
|
|
|
|
82
|
|
|
change = Change( |
|
83
|
|
|
nlri, |
|
84
|
|
|
Attributes() |
|
85
|
|
|
) |
|
86
|
|
|
|
|
87
|
|
|
while True: |
|
88
|
|
|
command = tokeniser() |
|
89
|
|
|
|
|
90
|
|
|
if not command: |
|
91
|
|
|
break |
|
92
|
|
|
|
|
93
|
|
|
action = AnnounceLabel.action.get(command,'') |
|
94
|
|
|
|
|
95
|
|
|
if action == 'attribute-add': |
|
96
|
|
|
change.attributes.add(AnnounceLabel.known[command](tokeniser)) |
|
97
|
|
|
elif action == 'nlri-set': |
|
98
|
|
|
change.nlri.assign(AnnounceLabel.assign[command],AnnounceLabel.known[command](tokeniser)) |
|
99
|
|
|
elif action == 'nexthop-and-attribute': |
|
100
|
|
|
nexthop,attribute = AnnounceLabel.known[command](tokeniser) |
|
101
|
|
|
change.nlri.nexthop = nexthop |
|
102
|
|
|
change.attributes.add(attribute) |
|
103
|
|
|
else: |
|
104
|
|
|
raise ValueError('unknown command "%s"' % command) |
|
105
|
|
|
|
|
106
|
|
|
if not AnnounceLabel.check(change,afi): |
|
107
|
|
|
raise ValueError('invalid announcement (missing next-hop or label ?)') |
|
108
|
|
|
|
|
109
|
|
|
return [change] |
|
110
|
|
|
|
|
111
|
|
|
|
|
112
|
|
|
@ParseAnnounce.register('nlri-mpls','extend-name','ipv4') |
|
113
|
|
|
def nlri_mpls_v4 (tokeniser): |
|
114
|
|
|
return ip_label(tokeniser,AFI.ipv4,SAFI.nlri_mpls) |
|
115
|
|
|
|
|
116
|
|
|
|
|
117
|
|
|
@ParseAnnounce.register('nlri-mpls','extend-name','ipv6') |
|
118
|
|
|
def nlri_mpls_v6 (tokeniser): |
|
119
|
|
|
return ip_label(tokeniser,AFI.ipv6,SAFI.nlri_mpls) |
|
120
|
|
|
|
Exa-Networks /
exabgp
Loading history...