| #!/usr/bin/env python3 |
| import unittest |
| |
| from framework import VppTestCase |
| from asfframework import 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 vpp_acl import AclRule, VppAcl, VppAclInterface |
| |
| from scapy.packet import Raw |
| from scapy.layers.l2 import Ether, Dot1Q |
| from scapy.layers.inet import IP, UDP |
| from socket import AF_INET |
| from ipaddress import IPv4Network |
| |
| 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(b"\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(b"\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(b"\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(b"\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 = AclRule( |
| is_permit=0, |
| proto=17, |
| ports=1234, |
| src_prefix=IPv4Network((any_src_addr, 32)), |
| dst_prefix=IPv4Network((ip_non_tag_bridged, 32)), |
| ) |
| acl = VppAcl(self, rules=[rule_1]) |
| acl.add_vpp_config() |
| |
| # |
| # Apply the ACL on the output interface |
| # |
| acl_if1 = VppAclInterface( |
| self, sw_if_index=self.pg1.sw_if_index, n_input=0, acls=[acl] |
| ) |
| acl_if1.add_vpp_config() |
| |
| # |
| # 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 |
| # |
| acl_if1.remove_vpp_config() |
| acl.remove_vpp_config() |
| |
| 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() |
| |
| |
| if __name__ == "__main__": |
| unittest.main(testRunner=VppTestRunner) |