diff options
Diffstat (limited to 'test/test_dvr.py')
| -rw-r--r-- | test/test_dvr.py | 410 |
1 files changed, 410 insertions, 0 deletions
diff --git a/test/test_dvr.py b/test/test_dvr.py new file mode 100644 index 00000000000..8531b8553ca --- /dev/null +++ b/test/test_dvr.py @@ -0,0 +1,410 @@ +#!/usr/bin/env python3 +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 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, inet_pton +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() + + 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(b'\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(b'\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(b'\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(b'\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(b'\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) |