1 # Copyright 2015 Intel Corporation.
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
15 """VSwitch controller for Physical to Physical deployment
20 from core.vswitch_controller import IVswitchController
21 from conf import settings
27 class VswitchControllerP2P(IVswitchController):
28 """VSwitch controller for P2P deployment scenario.
31 _vswitch_class: The vSwitch class to be used.
32 _vswitch: The vSwitch object controlled by this controller
33 _deployment_scenario: A string describing the scenario to set-up in the
36 def __init__(self, vswitch_class):
37 """Initializes up the prerequisites for the P2P deployment scenario.
39 :vswitch_class: the vSwitch class to be used.
41 self._logger = logging.getLogger(__name__)
42 self._vswitch_class = vswitch_class
43 self._vswitch = vswitch_class()
44 self._deployment_scenario = "P2P"
45 self._logger.debug('Creation using ' + str(self._vswitch_class))
48 """Sets up the switch for p2p.
50 self._logger.debug('Setup using ' + str(self._vswitch_class))
55 bridge = settings.getValue('VSWITCH_BRIDGE_NAME')
56 self._vswitch.add_switch(bridge)
58 (_, _) = self._vswitch.add_phy_port(bridge)
59 (_, _) = self._vswitch.add_phy_port(bridge)
61 self._vswitch.del_flow(bridge)
63 # table#0 - flows designed to force 5 & 13 tuple matches go here
64 flow = {'table':'0', 'priority':'1', 'actions': ['goto_table:1']}
65 self._vswitch.add_flow(bridge, flow)
67 # table#1 - flows to route packets between ports goes here. The
68 # chosen port is communicated to subsequent tables by setting the
69 # metadata value to the egress port number
70 flow = {'table':'1', 'priority':'1', 'in_port':'1',
71 'actions': ['write_actions(output:2)', 'write_metadata:2',
73 self._vswitch.add_flow(bridge, flow)
74 flow = {'table':'1', 'priority':'1', 'in_port':'2',
75 'actions': ['write_actions(output:1)', 'write_metadata:1',
77 self._vswitch.add_flow(bridge, flow)
79 # Frame modification table. Frame modification flow rules are
80 # isolated in this table so that they can be turned on or off
81 # without affecting the routing or tuple-matching flow rules.
82 flow = {'table':'2', 'priority':'1', 'actions': ['goto_table:3']}
83 self._vswitch.add_flow(bridge, flow)
86 # (TODO) Billy O'Mahony - the drop action here actually required in
87 # order to egress the packet. This is the subject of a thread on
88 # ovs-discuss 2015-06-30.
89 flow = {'table':'3', 'priority':'1', 'actions': ['drop']}
90 self._vswitch.add_flow(bridge, flow)
96 """Tears down the switch created in setup().
98 self._logger.debug('Stop using ' + str(self._vswitch_class))
104 def __exit__(self, type_, value, traceback):
107 def get_vswitch(self):
108 """See IVswitchController for description
112 def get_ports_info(self):
113 """See IVswitchController for description
115 self._logger.debug('get_ports_info using ' + str(self._vswitch_class))
116 return self._vswitch.get_ports(settings.getValue('VSWITCH_BRIDGE_NAME'))