| #!/usr/bin/env python |
| import random |
| import socket |
| import unittest |
| |
| from framework import VppTestCase, VppTestRunner |
| from vpp_sub_interface import VppSubInterface, VppDot1QSubint |
| from vpp_ip_route import VppIpRoute, VppRoutePath, DpoProto, VppIpMRoute, \ |
| VppMRoutePath, MRouteEntryFlags, MRouteItfFlags |
| from vpp_papi_provider import L2_VTR_OP |
| |
| from scapy.packet import Raw |
| from scapy.layers.l2 import Ether, Dot1Q, ARP |
| from scapy.layers.inet import IP, UDP |
| from util import ppp |
| |
| |
| class TestDVR(VppTestCase): |
| """ Distributed Virtual Router """ |
| |
| def setUp(self): |
| super(TestDVR, self).setUp() |
| |
| self.create_pg_interfaces(range(4)) |
| self.create_loopback_interfaces(range(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(self.pg0.sw_if_index, 1) |
| self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1) |
| self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index, 1) |
| self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index, 1) |
| self.vapi.sw_interface_set_l2_bridge(self.loop0.sw_if_index, 1, bvi=1) |
| |
| self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg2.sw_if_index, |
| L2_VTR_OP.L2_POP_1, |
| 92) |
| self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg3.sw_if_index, |
| L2_VTR_OP.L2_POP_1, |
| 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, |
| proto=DpoProto.DPO_PROTO_ETHERNET)]) |
| 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. |
| # |
| self.pg0.add_stream(pkt_no_tag) |
| |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg1.get_capture(1) |
| |
| self.assertEqual(rx[0][Ether].dst, pkt_no_tag[Ether].dst) |
| self.assertEqual(rx[0][Ether].src, pkt_no_tag[Ether].src) |
| |
| # |
| # 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, |
| proto=DpoProto.DPO_PROTO_ETHERNET)]) |
| route_with_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_tag * 65, 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 * 65, 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 * 65, self.pg1) |
| self.assert_same_mac_addr(pkt_tag_to_tag, rx) |
| self.assert_has_no_tag(rx) |
| |
| # |
| # cleanup |
| # |
| self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, 1, |
| enable=0) |
| self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1, |
| enable=0) |
| self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index, |
| 1, enable=0) |
| self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index, |
| 1, enable=0) |
| self.vapi.sw_interface_set_l2_bridge(self.loop0.sw_if_index, |
| 1, bvi=1, enable=0) |
| |
| # |
| # 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(self.pg0.sw_if_index, 1) |
| self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1) |
| self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index, 1) |
| self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index, 1) |
| self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg2.sw_if_index, |
| L2_VTR_OP.L2_POP_1, |
| 92) |
| self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg3.sw_if_index, |
| L2_VTR_OP.L2_POP_1, |
| 93) |
| |
| # |
| # Disable UU flooding, learning and ARM terminaation. makes this test |
| # easier as unicast packets are dropped if not extracted. |
| # |
| self.vapi.bridge_flags(1, 0, (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, |
| proto=DpoProto.DPO_PROTO_ETHERNET)]) |
| route_2 = VppIpRoute(self, "1.1.1.2", 32, |
| [VppRoutePath("0.0.0.0", |
| sub_if_on_pg2.sw_if_index, |
| proto=DpoProto.DPO_PROTO_ETHERNET)]) |
| route_1.add_vpp_config() |
| route_2.add_vpp_config() |
| |
| # |
| # packets are dropped because bridge does not flood unkown unicast |
| # |
| self.send_and_assert_no_replies(self.pg0, pkt_no_tag) |
| |
| # |
| # Enable L3 extraction on pgs |
| # |
| self.vapi.sw_interface_set_l2_emulation(self.pg0.sw_if_index) |
| self.vapi.sw_interface_set_l2_emulation(self.pg1.sw_if_index) |
| self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg2.sw_if_index) |
| self.vapi.sw_interface_set_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 * 65, 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 * 65, 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 * 65, 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 * 65, 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.sw_interface_set_l2_emulation(self.pg0.sw_if_index, |
| enable=0) |
| self.vapi.sw_interface_set_l2_emulation(self.pg1.sw_if_index, |
| enable=0) |
| self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg2.sw_if_index, |
| enable=0) |
| self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg3.sw_if_index, |
| enable=0) |
| |
| self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, |
| 1, enable=0) |
| self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, |
| 1, enable=0) |
| self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index, |
| 1, enable=0) |
| self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index, |
| 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) |