307207742e
This is step 2 implementation of OFAgent l2-population. This handles an arp packet responding locally to an arp request in such a way that sends an arp request as a packet-in message to controller and builds and sends an arp reply packet. Currently this only supports tunnel. Implements: blueprint ofagent-l2pop Change-Id: Ida714f30c0f02c54dda3402c0dbf6047bc182b22
310 lines
13 KiB
Python
310 lines
13 KiB
Python
# Copyright (C) 2014 VA Linux Systems Japan K.K.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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# @author: Fumihiko Kakuma, VA Linux Systems Japan K.K.
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import collections
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import contextlib
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import mock
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from neutron.openstack.common import importutils
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from neutron.tests.unit.ofagent import ofa_test_base
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_OFALIB_NAME = 'neutron.plugins.ofagent.agent.arp_lib'
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class OFAAgentTestCase(ofa_test_base.OFAAgentTestBase):
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def setUp(self):
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super(OFAAgentTestCase, self).setUp()
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Net = collections.namedtuple('Net', 'net, mac, ip')
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self.nets = [Net(net=10, mac='11:11:11:44:55:66', ip='10.1.2.20'),
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Net(net=10, mac='11:11:11:44:55:67', ip='10.1.2.21'),
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Net(net=20, mac='22:22:22:44:55:66', ip='10.2.2.20')]
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self.packet_mod = mock.Mock()
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self.proto_ethernet_mod = mock.Mock()
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self.proto_vlan_mod = mock.Mock()
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self.proto_vlan_mod.vid = self.nets[0].net
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self.proto_arp_mod = mock.Mock()
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self.fake_get_protocol = mock.Mock(return_value=self.proto_vlan_mod)
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self.packet_mod.get_protocol = self.fake_get_protocol
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self.fake_add_protocol = mock.Mock()
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self.packet_mod.add_protocol = self.fake_add_protocol
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self.arp = importutils.import_module('ryu.lib.packet.arp')
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self.ethernet = importutils.import_module('ryu.lib.packet.ethernet')
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self.vlan = importutils.import_module('ryu.lib.packet.vlan')
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mock.patch('ryu.lib.packet.packet.Packet',
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return_value=self.packet_mod).start()
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self.ryuapp = 'ryuapp'
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self.inport = '1'
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self.ev = mock.Mock()
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self.datapath = self._mk_test_dp('tun_br')
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self.ofproto = importutils.import_module('ryu.ofproto.ofproto_v1_3')
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self.ofpp = mock.Mock()
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self.datapath.ofproto = self.ofproto
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self.datapath.ofproto_parser = self.ofpp
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self.OFPActionOutput = mock.Mock()
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self.OFPActionOutput.return_value = 'OFPActionOutput'
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self.ofpp.OFPActionOutput = self.OFPActionOutput
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self.msg = mock.Mock()
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self.msg.datapath = self.datapath
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self.msg.buffer_id = self.ofproto.OFP_NO_BUFFER
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self.msg_data = 'test_message_data'
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self.msg.data = self.msg_data
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self.ev.msg = self.msg
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self.msg.match = {'in_port': self.inport}
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class TestArpLib(OFAAgentTestCase):
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def setUp(self):
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super(TestArpLib, self).setUp()
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self.mod_arplib = importutils.import_module(_OFALIB_NAME)
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self.arplib = self.mod_arplib.ArpLib(self.ryuapp)
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self.packet_mod.get_protocol = self._fake_get_protocol
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self._fake_get_protocol_ethernet = True
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self._fake_get_protocol_vlan = True
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self._fake_get_protocol_arp = True
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def test__send_unknown_packet_no_buffer(self):
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in_port = 3
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out_port = self.ofproto.OFPP_TABLE
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self.msg.buffer_id = self.ofproto.OFP_NO_BUFFER
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self.arplib._send_unknown_packet(self.msg, in_port, out_port)
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actions = [self.ofpp.OFPActionOutput(self.ofproto.OFPP_TABLE, 0)]
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self.ofpp.OFPPacketOut.assert_called_once_with(
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datapath=self.datapath,
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buffer_id=self.msg.buffer_id,
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in_port=in_port,
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actions=actions,
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data=self.msg_data)
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def test__send_unknown_packet_existence_buffer(self):
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in_port = 3
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out_port = self.ofproto.OFPP_TABLE
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self.msg.buffer_id = 256
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self.arplib._send_unknown_packet(self.msg, in_port, out_port)
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actions = [self.ofpp.OFPActionOutput(self.ofproto.OFPP_TABLE, 0)]
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self.ofpp.OFPPacketOut.assert_called_once_with(
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datapath=self.datapath,
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buffer_id=self.msg.buffer_id,
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in_port=in_port,
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actions=actions,
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data=None)
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def test__respond_arp(self):
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self.arplib._arp_tbl = {
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self.nets[0].net: {self.nets[0].ip: self.nets[0].mac}}
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port = 3
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arptbl = self.arplib._arp_tbl[self.nets[0].net]
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pkt_ethernet = self.ethernet
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pkt_vlan = self.vlan
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pkt_arp = self.arp
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pkt_arp.opcode = self.arp.ARP_REQUEST
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pkt_arp.dst_ip = self.nets[0].ip
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with mock.patch.object(
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self.arplib, '_send_arp_reply'
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) as send_arp_rep_fn:
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self.assertTrue(
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self.arplib._respond_arp(self.datapath, port, arptbl,
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pkt_ethernet, pkt_vlan, pkt_arp))
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ethernet_ethernet = self.ethernet.ethernet(
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ethertype=pkt_ethernet.ethertype,
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dst=pkt_ethernet.src,
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src=self.nets[0].mac)
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vlan_vlan = self.vlan.vlan(cfi=pkt_vlan.cfi,
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ethertype=pkt_vlan.ethertype,
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pcp=pkt_vlan.pcp,
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vid=pkt_vlan.vid)
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arp_arp = self.arp.arp(opcode=self.arp.ARP_REPLY,
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src_mac=self.nets[0].mac,
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src_ip=pkt_arp.dst_ip,
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dst_mac=pkt_arp.src_mac,
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dst_ip=pkt_arp.src_ip)
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self.fake_add_protocol.assert_has_calls([mock.call(ethernet_ethernet),
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mock.call(vlan_vlan),
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mock.call(arp_arp)])
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send_arp_rep_fn.assert_called_once_with(
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self.datapath, port, self.packet_mod)
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def _test__respond_arp(self, pkt_arp):
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self.arplib._arp_tbl = {
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self.nets[0].net: {self.nets[0].ip: self.nets[0].mac}}
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port = 3
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arptbl = self.arplib._arp_tbl[self.nets[0].net]
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pkt_ethernet = mock.Mock()
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pkt_vlan = mock.Mock()
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self.assertFalse(
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self.arplib._respond_arp(self.datapath, port, arptbl,
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pkt_ethernet, pkt_vlan, pkt_arp))
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def test__respond_arp_non_arp_req(self):
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pkt_arp = mock.Mock()
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pkt_arp.opcode = self.arp.ARP_REPLY
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self._test__respond_arp(pkt_arp)
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def test__respond_arp_ip_not_found_in_arptable(self):
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pkt_arp = mock.Mock()
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pkt_arp.opcode = self.arp.ARP_REQUEST
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pkt_arp.dst_ip = self.nets[1].ip
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self._test__respond_arp(pkt_arp)
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def test_add_arp_table_entry(self):
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self.arplib.add_arp_table_entry(self.nets[0].net,
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self.nets[0].ip, self.nets[0].mac)
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self.assertEqual(
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self.arplib._arp_tbl,
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{self.nets[0].net: {self.nets[0].ip: self.nets[0].mac}})
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def test_add_arp_table_entry_multiple_net(self):
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self.arplib.add_arp_table_entry(self.nets[0].net,
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self.nets[0].ip, self.nets[0].mac)
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self.arplib.add_arp_table_entry(self.nets[2].net,
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self.nets[2].ip, self.nets[2].mac)
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self.assertEqual(
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self.arplib._arp_tbl,
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{self.nets[0].net: {self.nets[0].ip: self.nets[0].mac},
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self.nets[2].net: {self.nets[2].ip: self.nets[2].mac}})
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def test_add_arp_table_entry_multiple_ip(self):
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self.arplib.add_arp_table_entry(self.nets[0].net,
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self.nets[0].ip, self.nets[0].mac)
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self.arplib.add_arp_table_entry(self.nets[0].net,
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self.nets[1].ip, self.nets[1].mac)
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self.assertEqual(
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self.arplib._arp_tbl,
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{self.nets[0].net: {self.nets[0].ip: self.nets[0].mac,
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self.nets[1].ip: self.nets[1].mac}})
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def test_del_arp_table_entry(self):
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self.arplib._arp_tbl = {
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self.nets[0].net: {self.nets[0].ip: self.nets[0].mac}}
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self.arplib.del_arp_table_entry(self.nets[0].net, self.nets[0].ip)
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self.assertEqual(self.arplib._arp_tbl, {})
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def test_del_arp_table_entry_multiple_net(self):
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self.arplib._arp_tbl = {
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self.nets[0].net: {self.nets[0].ip: self.nets[0].mac},
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self.nets[2].net: {self.nets[2].ip: self.nets[2].mac}}
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self.arplib.del_arp_table_entry(self.nets[0].net, self.nets[0].ip)
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self.assertEqual(
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self.arplib._arp_tbl,
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{self.nets[2].net: {self.nets[2].ip: self.nets[2].mac}})
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def test_del_arp_table_entry_multiple_ip(self):
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self.arplib._arp_tbl = {
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self.nets[0].net: {self.nets[0].ip: self.nets[0].mac,
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self.nets[1].ip: self.nets[1].mac}}
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self.arplib.del_arp_table_entry(self.nets[0].net, self.nets[1].ip)
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self.assertEqual(
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self.arplib._arp_tbl,
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{self.nets[0].net: {self.nets[0].ip: self.nets[0].mac}})
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def _fake_get_protocol(self, net_type):
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if net_type == self.ethernet.ethernet:
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if self._fake_get_protocol_ethernet:
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return self.proto_ethernet_mod
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else:
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return
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if net_type == self.vlan.vlan:
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if self._fake_get_protocol_vlan:
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return self.proto_vlan_mod
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else:
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return
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if net_type == self.arp.arp:
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if self._fake_get_protocol_arp:
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return self.proto_arp_mod
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else:
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return
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def test_packet_in_handler(self):
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self.arplib._arp_tbl = {
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self.nets[0].net: {self.nets[0].ip: self.nets[0].mac}}
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with contextlib.nested(
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mock.patch.object(self.arplib, '_respond_arp',
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return_value=True),
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mock.patch.object(self.arplib,
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'_add_flow_to_avoid_unknown_packet'),
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mock.patch.object(self.arplib,
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'_send_unknown_packet'),
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) as (res_arp_fn, add_flow_fn, send_unknown_pk_fn):
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self.arplib.packet_in_handler(self.ev)
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self.assertFalse(add_flow_fn.call_count)
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self.assertFalse(send_unknown_pk_fn.call_count)
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res_arp_fn.assert_called_once_with(
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self.datapath, self.inport,
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self.arplib._arp_tbl[self.nets[0].net],
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self.proto_ethernet_mod, self.proto_vlan_mod, self.proto_arp_mod)
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def _test_packet_in_handler(self):
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self.arplib._arp_tbl = {
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self.nets[0].net: {self.nets[0].ip: self.nets[0].mac}}
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with contextlib.nested(
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mock.patch.object(self.arplib, '_respond_arp',
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return_value=True),
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mock.patch.object(self.arplib,
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'_add_flow_to_avoid_unknown_packet'),
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mock.patch.object(self.arplib,
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'_send_unknown_packet'),
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) as (res_arp_fn, add_flow_fn, send_unknown_pk_fn):
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self.arplib.packet_in_handler(self.ev)
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self.assertFalse(add_flow_fn.call_count)
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self.assertFalse(send_unknown_pk_fn.call_count)
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self.assertFalse(res_arp_fn.call_count)
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def test_packet_in_handler_non_ethernet(self):
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self._fake_get_protocol_ethernet = False
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self._test_packet_in_handler()
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def test_packet_in_handler_non_vlan(self):
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self._fake_get_protocol_vlan = False
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self._test_packet_in_handler()
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def test_packet_in_handler_non_arp(self):
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self._fake_get_protocol_arp = False
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self._test_packet_in_handler()
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def test_packet_in_handler_unknown_network(self):
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self.arplib._arp_tbl = {
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self.nets[0].net: {self.nets[0].ip: self.nets[0].mac}}
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with contextlib.nested(
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mock.patch.object(self.arplib, '_respond_arp',
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return_value=False),
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mock.patch.object(self.arplib,
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'_add_flow_to_avoid_unknown_packet'),
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mock.patch.object(self.arplib,
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'_send_unknown_packet'),
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) as (res_arp_fn, add_flow_fn, send_unknown_pk_fn):
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self.arplib.packet_in_handler(self.ev)
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add_flow_fn.assert_called_once_with(
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self.datapath,
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self.datapath.ofproto_parser.OFPMatch(
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eth_type=self.ethernet.ETH_TYPE_ARP,
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vlan_vid=self.proto_vlan_mod.vid |
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self.datapath.ofproto.OFPVID_PRESENT,
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arp_op=self.arp.ARP_REQUEST,
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arp_tpa=self.proto_arp_mod.dst_ip))
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send_unknown_pk_fn.assert_called_once_with(
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self.ev.msg, self.msg.match['in_port'],
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self.datapath.ofproto.OFPP_TABLE)
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res_arp_fn.assert_called_once_with(
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self.datapath, self.inport,
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self.arplib._arp_tbl[self.nets[0].net],
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self.proto_ethernet_mod, self.proto_vlan_mod, self.proto_arp_mod)
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