1 | # encoding: utf-8 |
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2 | """ |
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3 | __init__.py |
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4 | |||
5 | Created by Thomas Mangin on 2015-06-04. |
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6 | Copyright (c) 2009-2017 Exa Networks. All rights reserved. |
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7 | License: 3-clause BSD. (See the COPYRIGHT file) |
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8 | """ |
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9 | |||
10 | from exabgp.protocol.family import SAFI |
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11 | |||
12 | from exabgp.configuration.core import Section |
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13 | |||
14 | from exabgp.configuration.flow.route import ParseFlowRoute |
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15 | from exabgp.configuration.flow.route import ParseFlowMatch |
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16 | from exabgp.configuration.flow.route import ParseFlowThen |
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17 | from exabgp.configuration.flow.route import ParseFlowScope |
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18 | |||
19 | from exabgp.rib.change import Change |
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20 | from exabgp.bgp.message.update.nlri import Flow |
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21 | from exabgp.bgp.message.update.attribute import Attributes |
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22 | from exabgp.bgp.message.update.nlri.qualifier import RouteDistinguisher |
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23 | |||
24 | |||
25 | class ParseFlow(Section): |
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26 | syntax = 'flow {\n' ' %s' '}' % ';\n '.join(ParseFlowRoute.syntax.split('\n')) |
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27 | |||
28 | name = 'flow' |
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29 | |||
30 | known = dict(ParseFlowMatch.known) |
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31 | known.update(ParseFlowThen.known) |
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32 | known.update(ParseFlowScope.known) |
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33 | |||
34 | action = dict(ParseFlowMatch.action) |
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35 | action.update(ParseFlowThen.action) |
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36 | action.update(ParseFlowScope.action) |
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37 | |||
38 | def __init__(self, tokeniser, scope, error): |
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39 | Section.__init__(self, tokeniser, scope, error) |
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40 | |||
41 | def clear(self): |
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42 | pass |
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43 | |||
44 | def pre(self): |
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45 | return True |
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46 | |||
47 | def post(self): |
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48 | self.scope.set('routes', self.scope.get_routes()) |
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49 | return True |
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50 | |||
51 | def check(self): |
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52 | return True |
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53 | |||
54 | |||
55 | @ParseFlow.register('route', 'append-route') |
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56 | def route(tokeniser): |
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57 | change = Change(Flow(), Attributes()) |
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58 | |||
59 | View Code Duplication | while True: |
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60 | command = tokeniser() |
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61 | |||
62 | if not command: |
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63 | break |
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64 | |||
65 | action = ParseFlow.action[command] |
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66 | |||
67 | if action == 'nlri-add': |
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68 | for adding in ParseFlow.known[command](tokeniser): |
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69 | change.nlri.add(adding) |
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70 | elif action == 'attribute-add': |
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71 | change.attributes.add(ParseFlow.known[command](tokeniser)) |
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72 | elif action == 'nexthop-and-attribute': |
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73 | nexthop, attribute = ParseFlow.known[command](tokeniser) |
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74 | change.nlri.nexthop = nexthop |
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75 | change.attributes.add(attribute) |
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76 | elif action == 'nop': |
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77 | pass # yes nothing to do ! |
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78 | else: |
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79 | raise ValueError('flow: unknown command "%s"' % command) |
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80 | |||
81 | if change.nlri.rd is not RouteDistinguisher.NORD: |
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82 | change.nlri.safi = SAFI.flow_vpn |
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83 | |||
84 | return [change] |
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85 |