| #!/usr/bin/env python |
| import unittest |
| |
| from framework import VppTestCase, VppTestRunner |
| from vpp_ip_route import VppIpRoute, VppRoutePath, FibPathType |
| from vpp_l2 import L2_PORT_TYPE |
| from vpp_sub_interface import L2_VTR_OP, VppDot1QSubint |
| |
| from scapy.packet import Raw |
| from scapy.layers.l2 import Ether, Dot1Q |
| from scapy.layers.inet import IP, UDP |
| from socket import AF_INET, inet_pton |
| |
| NUM_PKTS = 67 |
| |
| |
| class TestDVR(VppTestCase): |
| """ Distributed Virtual Router """ |
| |
| @classmethod |
| def setUpClass(cls): |
| super(TestDVR, cls).setUpClass() |
| |
| @classmethod |
| def tearDownClass(cls): |
| super(TestDVR, cls).tearDownClass() |
| |
| def setUp(self): |
| super(TestDVR, self).setUp() |
| |
| self.create_pg_interfaces(range(4)) |
| self.create_loopback_interfaces(1) |
| |
| for i in self.pg_interfaces: |
| i.admin_up() |
| |
| self.loop0.config_ip4() |
| |
| def tearDown(self): |
| for i in self.pg_interfaces: |
| i.admin_down() |
| self.loop0.unconfig_ip4() |
| |
| super(TestDVR, self).tearDown() |
| |
| def assert_same_mac_addr(self, tx, rx): |
| t_eth = tx[Ether] |
| for p in rx: |
| r_eth = p[Ether] |
| self.assertEqual(t_eth.src, r_eth.src) |
| self.assertEqual(t_eth.dst, r_eth.dst) |
| |
| def assert_has_vlan_tag(self, tag, rx): |
| for p in rx: |
| r_1q = p[Dot1Q] |
| self.assertEqual(tag, r_1q.vlan) |
| |
| def assert_has_no_tag(self, rx): |
| for p in rx: |
| self.assertFalse(p.haslayer(Dot1Q)) |
| |
| def test_dvr(self): |
| """ Distributed Virtual Router """ |
| |
| # |
| # A packet destined to an IP address that is L2 bridged via |
| # a non-tag interface |
| # |
| ip_non_tag_bridged = "10.10.10.10" |
| ip_tag_bridged = "10.10.10.11" |
| any_src_addr = "1.1.1.1" |
| |
| pkt_no_tag = (Ether(src=self.pg0.remote_mac, |
| dst=self.loop0.local_mac) / |
| IP(src=any_src_addr, |
| dst=ip_non_tag_bridged) / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| pkt_tag = (Ether(src=self.pg0.remote_mac, |
| dst=self.loop0.local_mac) / |
| IP(src=any_src_addr, |
| dst=ip_tag_bridged) / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| |
| # |
| # Two sub-interfaces so we can test VLAN tag push/pop |
| # |
| sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92) |
| sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93) |
| sub_if_on_pg2.admin_up() |
| sub_if_on_pg3.admin_up() |
| |
| # |
| # Put all the interfaces into a new bridge domain |
| # |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=self.pg0.sw_if_index, bd_id=1) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=self.pg1.sw_if_index, bd_id=1) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=self.loop0.sw_if_index, bd_id=1, |
| port_type=L2_PORT_TYPE.BVI) |
| |
| self.vapi.l2_interface_vlan_tag_rewrite( |
| sw_if_index=sub_if_on_pg2.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1, |
| push_dot1q=92) |
| self.vapi.l2_interface_vlan_tag_rewrite( |
| sw_if_index=sub_if_on_pg3.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1, |
| push_dot1q=93) |
| |
| # |
| # Add routes to bridge the traffic via a tagged an nontagged interface |
| # |
| route_no_tag = VppIpRoute( |
| self, ip_non_tag_bridged, 32, |
| [VppRoutePath("0.0.0.0", |
| self.pg1.sw_if_index, |
| type=FibPathType.FIB_PATH_TYPE_DVR)]) |
| route_no_tag.add_vpp_config() |
| |
| # |
| # Inject the packet that arrives and leaves on a non-tagged interface |
| # Since it's 'bridged' expect that the MAC headed is unchanged. |
| # |
| rx = self.send_and_expect(self.pg0, pkt_no_tag * NUM_PKTS, self.pg1) |
| self.assert_same_mac_addr(pkt_no_tag, rx) |
| self.assert_has_no_tag(rx) |
| |
| # |
| # Add routes to bridge the traffic via a tagged interface |
| # |
| route_with_tag = VppIpRoute( |
| self, ip_tag_bridged, 32, |
| [VppRoutePath("0.0.0.0", |
| sub_if_on_pg3.sw_if_index, |
| type=FibPathType.FIB_PATH_TYPE_DVR)]) |
| route_with_tag.add_vpp_config() |
| |
| # |
| # Inject the packet that arrives non-tag and leaves on a tagged |
| # interface |
| # |
| rx = self.send_and_expect(self.pg0, pkt_tag * NUM_PKTS, self.pg3) |
| self.assert_same_mac_addr(pkt_tag, rx) |
| self.assert_has_vlan_tag(93, rx) |
| |
| # |
| # Tag to tag |
| # |
| pkt_tag_to_tag = (Ether(src=self.pg2.remote_mac, |
| dst=self.loop0.local_mac) / |
| Dot1Q(vlan=92) / |
| IP(src=any_src_addr, |
| dst=ip_tag_bridged) / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| |
| rx = self.send_and_expect(self.pg2, |
| pkt_tag_to_tag * NUM_PKTS, |
| self.pg3) |
| self.assert_same_mac_addr(pkt_tag_to_tag, rx) |
| self.assert_has_vlan_tag(93, rx) |
| |
| # |
| # Tag to non-Tag |
| # |
| pkt_tag_to_non_tag = (Ether(src=self.pg2.remote_mac, |
| dst=self.loop0.local_mac) / |
| Dot1Q(vlan=92) / |
| IP(src=any_src_addr, |
| dst=ip_non_tag_bridged) / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| |
| rx = self.send_and_expect(self.pg2, |
| pkt_tag_to_non_tag * NUM_PKTS, |
| self.pg1) |
| self.assert_same_mac_addr(pkt_tag_to_tag, rx) |
| self.assert_has_no_tag(rx) |
| |
| # |
| # Add an output L3 ACL that will block the traffic |
| # |
| rule_1 = ({'is_permit': 0, |
| 'is_ipv6': 0, |
| 'proto': 17, |
| 'srcport_or_icmptype_first': 1234, |
| 'srcport_or_icmptype_last': 1234, |
| 'src_ip_prefix_len': 32, |
| 'src_ip_addr': inet_pton(AF_INET, any_src_addr), |
| 'dstport_or_icmpcode_first': 1234, |
| 'dstport_or_icmpcode_last': 1234, |
| 'dst_ip_prefix_len': 32, |
| 'dst_ip_addr': inet_pton(AF_INET, ip_non_tag_bridged)}) |
| acl = self.vapi.acl_add_replace(acl_index=4294967295, |
| r=[rule_1]) |
| |
| # |
| # Apply the ACL on the output interface |
| # |
| self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index, |
| 0, |
| [acl.acl_index]) |
| |
| # |
| # Send packet's that should match the ACL and be dropped |
| # |
| rx = self.send_and_assert_no_replies(self.pg2, |
| pkt_tag_to_non_tag * NUM_PKTS) |
| |
| # |
| # cleanup |
| # |
| self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index, |
| 0, []) |
| self.vapi.acl_del(acl.acl_index) |
| |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=self.pg0.sw_if_index, bd_id=1, enable=0) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=self.pg1.sw_if_index, bd_id=1, enable=0) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1, enable=0) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1, enable=0) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=self.loop0.sw_if_index, bd_id=1, |
| port_type=L2_PORT_TYPE.BVI, enable=0) |
| |
| # |
| # Do a FIB dump to make sure the paths are correctly reported as DVR |
| # |
| routes = self.vapi.ip_route_dump(0) |
| |
| for r in routes: |
| if (ip_tag_bridged == str(r.route.prefix.network_address)): |
| self.assertEqual(r.route.paths[0].sw_if_index, |
| sub_if_on_pg3.sw_if_index) |
| self.assertEqual(r.route.paths[0].type, |
| FibPathType.FIB_PATH_TYPE_DVR) |
| if (ip_non_tag_bridged == str(r.route.prefix.network_address)): |
| self.assertEqual(r.route.paths[0].sw_if_index, |
| self.pg1.sw_if_index) |
| self.assertEqual(r.route.paths[0].type, |
| FibPathType.FIB_PATH_TYPE_DVR) |
| |
| # |
| # the explicit route delete is require so it happens before |
| # the sbu-interface delete. subinterface delete is required |
| # because that object type does not use the object registry |
| # |
| route_no_tag.remove_vpp_config() |
| route_with_tag.remove_vpp_config() |
| sub_if_on_pg3.remove_vpp_config() |
| sub_if_on_pg2.remove_vpp_config() |
| |
| def test_l2_emulation(self): |
| """ L2 Emulation """ |
| |
| # |
| # non distinct L3 packets, in the tag/non-tag combos |
| # |
| pkt_no_tag = (Ether(src=self.pg0.remote_mac, |
| dst=self.pg1.remote_mac) / |
| IP(src="2.2.2.2", |
| dst="1.1.1.1") / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| pkt_to_tag = (Ether(src=self.pg0.remote_mac, |
| dst=self.pg2.remote_mac) / |
| IP(src="2.2.2.2", |
| dst="1.1.1.2") / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| pkt_from_tag = (Ether(src=self.pg3.remote_mac, |
| dst=self.pg2.remote_mac) / |
| Dot1Q(vlan=93) / |
| IP(src="2.2.2.2", |
| dst="1.1.1.1") / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| pkt_from_to_tag = (Ether(src=self.pg3.remote_mac, |
| dst=self.pg2.remote_mac) / |
| Dot1Q(vlan=93) / |
| IP(src="2.2.2.2", |
| dst="1.1.1.2") / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| pkt_bcast = (Ether(src=self.pg0.remote_mac, |
| dst="ff:ff:ff:ff:ff:ff") / |
| IP(src="2.2.2.2", |
| dst="255.255.255.255") / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| |
| # |
| # A couple of sub-interfaces for tags |
| # |
| sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92) |
| sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93) |
| sub_if_on_pg2.admin_up() |
| sub_if_on_pg3.admin_up() |
| |
| # |
| # Put all the interfaces into a new bridge domain |
| # |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=self.pg0.sw_if_index, bd_id=1) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=self.pg1.sw_if_index, bd_id=1) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1) |
| self.vapi.l2_interface_vlan_tag_rewrite( |
| sw_if_index=sub_if_on_pg2.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1, |
| push_dot1q=92) |
| self.vapi.l2_interface_vlan_tag_rewrite( |
| sw_if_index=sub_if_on_pg3.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1, |
| push_dot1q=93) |
| |
| # |
| # Disable UU flooding, learning and ARP termination. makes this test |
| # easier as unicast packets are dropped if not extracted. |
| # |
| self.vapi.bridge_flags(bd_id=1, is_set=0, |
| flags=(1 << 0) | (1 << 3) | (1 << 4)) |
| |
| # |
| # Add a DVR route to steer traffic at L3 |
| # |
| route_1 = VppIpRoute( |
| self, "1.1.1.1", 32, |
| [VppRoutePath("0.0.0.0", |
| self.pg1.sw_if_index, |
| type=FibPathType.FIB_PATH_TYPE_DVR)]) |
| route_2 = VppIpRoute( |
| self, "1.1.1.2", 32, |
| [VppRoutePath("0.0.0.0", |
| sub_if_on_pg2.sw_if_index, |
| type=FibPathType.FIB_PATH_TYPE_DVR)]) |
| route_1.add_vpp_config() |
| route_2.add_vpp_config() |
| |
| # |
| # packets are dropped because bridge does not flood unknown unicast |
| # |
| self.send_and_assert_no_replies(self.pg0, pkt_no_tag) |
| |
| # |
| # Enable L3 extraction on pgs |
| # |
| self.vapi.l2_emulation(self.pg0.sw_if_index) |
| self.vapi.l2_emulation(self.pg1.sw_if_index) |
| self.vapi.l2_emulation(sub_if_on_pg2.sw_if_index) |
| self.vapi.l2_emulation(sub_if_on_pg3.sw_if_index) |
| |
| # |
| # now we expect the packet forward according to the DVR route |
| # |
| rx = self.send_and_expect(self.pg0, pkt_no_tag * NUM_PKTS, self.pg1) |
| self.assert_same_mac_addr(pkt_no_tag, rx) |
| self.assert_has_no_tag(rx) |
| |
| rx = self.send_and_expect(self.pg0, pkt_to_tag * NUM_PKTS, self.pg2) |
| self.assert_same_mac_addr(pkt_to_tag, rx) |
| self.assert_has_vlan_tag(92, rx) |
| |
| rx = self.send_and_expect(self.pg3, pkt_from_tag * NUM_PKTS, self.pg1) |
| self.assert_same_mac_addr(pkt_from_tag, rx) |
| self.assert_has_no_tag(rx) |
| |
| rx = self.send_and_expect(self.pg3, |
| pkt_from_to_tag * NUM_PKTS, |
| self.pg2) |
| self.assert_same_mac_addr(pkt_from_tag, rx) |
| self.assert_has_vlan_tag(92, rx) |
| |
| # |
| # but broadcast packets are still flooded |
| # |
| self.send_and_expect(self.pg0, pkt_bcast * 33, self.pg2) |
| |
| # |
| # cleanup |
| # |
| self.vapi.l2_emulation(self.pg0.sw_if_index, |
| enable=0) |
| self.vapi.l2_emulation(self.pg1.sw_if_index, |
| enable=0) |
| self.vapi.l2_emulation(sub_if_on_pg2.sw_if_index, |
| enable=0) |
| self.vapi.l2_emulation(sub_if_on_pg3.sw_if_index, |
| enable=0) |
| |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=self.pg0.sw_if_index, bd_id=1, enable=0) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=self.pg1.sw_if_index, bd_id=1, enable=0) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1, enable=0) |
| self.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1, enable=0) |
| |
| route_1.remove_vpp_config() |
| route_2.remove_vpp_config() |
| sub_if_on_pg3.remove_vpp_config() |
| sub_if_on_pg2.remove_vpp_config() |
| |
| |
| if __name__ == '__main__': |
| unittest.main(testRunner=VppTestRunner) |