7f9b7f9f49
Continuation/Part 2 of https://gerrit.fd.io/r/#/c/17092/ Change-Id: Id0122d84eaf2c05d29e5be63a594d5e528ee7c9a Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
405 lines
15 KiB
Python
405 lines
15 KiB
Python
#!/usr/bin/env python
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import unittest
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from framework import VppTestCase, VppTestRunner
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from vpp_ip_route import VppIpRoute, VppRoutePath
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from vpp_l2 import L2_PORT_TYPE
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from vpp_sub_interface import L2_VTR_OP, VppDot1QSubint
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from scapy.packet import Raw
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from scapy.layers.l2 import Ether, Dot1Q
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from scapy.layers.inet import IP, UDP
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from socket import AF_INET, inet_pton
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class TestDVR(VppTestCase):
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""" Distributed Virtual Router """
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@classmethod
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def setUpClass(cls):
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super(TestDVR, cls).setUpClass()
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@classmethod
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def tearDownClass(cls):
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super(TestDVR, cls).tearDownClass()
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def setUp(self):
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super(TestDVR, self).setUp()
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self.create_pg_interfaces(range(4))
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self.create_loopback_interfaces(1)
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for i in self.pg_interfaces:
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i.admin_up()
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self.loop0.config_ip4()
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def tearDown(self):
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for i in self.pg_interfaces:
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i.admin_down()
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self.loop0.unconfig_ip4()
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super(TestDVR, self).tearDown()
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def assert_same_mac_addr(self, tx, rx):
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t_eth = tx[Ether]
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for p in rx:
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r_eth = p[Ether]
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self.assertEqual(t_eth.src, r_eth.src)
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self.assertEqual(t_eth.dst, r_eth.dst)
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def assert_has_vlan_tag(self, tag, rx):
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for p in rx:
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r_1q = p[Dot1Q]
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self.assertEqual(tag, r_1q.vlan)
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def assert_has_no_tag(self, rx):
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for p in rx:
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self.assertFalse(p.haslayer(Dot1Q))
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def test_dvr(self):
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""" Distributed Virtual Router """
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#
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# A packet destined to an IP address that is L2 bridged via
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# a non-tag interface
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#
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ip_non_tag_bridged = "10.10.10.10"
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ip_tag_bridged = "10.10.10.11"
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any_src_addr = "1.1.1.1"
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pkt_no_tag = (Ether(src=self.pg0.remote_mac,
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dst=self.loop0.local_mac) /
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IP(src=any_src_addr,
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dst=ip_non_tag_bridged) /
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UDP(sport=1234, dport=1234) /
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Raw('\xa5' * 100))
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pkt_tag = (Ether(src=self.pg0.remote_mac,
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dst=self.loop0.local_mac) /
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IP(src=any_src_addr,
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dst=ip_tag_bridged) /
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UDP(sport=1234, dport=1234) /
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Raw('\xa5' * 100))
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#
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# Two sub-interfaces so we can test VLAN tag push/pop
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#
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sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
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sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
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sub_if_on_pg2.admin_up()
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sub_if_on_pg3.admin_up()
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#
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# Put all the interfaces into a new bridge domain
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#
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=self.pg0.sw_if_index, bd_id=1)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=self.pg1.sw_if_index, bd_id=1)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=self.loop0.sw_if_index, bd_id=1,
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port_type=L2_PORT_TYPE.BVI)
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self.vapi.l2_interface_vlan_tag_rewrite(
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sw_if_index=sub_if_on_pg2.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
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push_dot1q=92)
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self.vapi.l2_interface_vlan_tag_rewrite(
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sw_if_index=sub_if_on_pg3.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
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push_dot1q=93)
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#
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# Add routes to bridge the traffic via a tagged an nontagged interface
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#
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route_no_tag = VppIpRoute(
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self, ip_non_tag_bridged, 32,
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[VppRoutePath("0.0.0.0",
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self.pg1.sw_if_index,
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is_dvr=1)])
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route_no_tag.add_vpp_config()
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#
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# Inject the packet that arrives and leaves on a non-tagged interface
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# Since it's 'bridged' expect that the MAC headed is unchanged.
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#
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rx = self.send_and_expect(self.pg0, pkt_no_tag * 65, self.pg1)
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self.assert_same_mac_addr(pkt_no_tag, rx)
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self.assert_has_no_tag(rx)
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#
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# Add routes to bridge the traffic via a tagged interface
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#
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route_with_tag = VppIpRoute(
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self, ip_tag_bridged, 32,
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[VppRoutePath("0.0.0.0",
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sub_if_on_pg3.sw_if_index,
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is_dvr=1)])
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route_with_tag.add_vpp_config()
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#
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# Inject the packet that arrives non-tag and leaves on a tagged
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# interface
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#
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rx = self.send_and_expect(self.pg0, pkt_tag * 65, self.pg3)
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self.assert_same_mac_addr(pkt_tag, rx)
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self.assert_has_vlan_tag(93, rx)
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#
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# Tag to tag
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#
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pkt_tag_to_tag = (Ether(src=self.pg2.remote_mac,
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dst=self.loop0.local_mac) /
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Dot1Q(vlan=92) /
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IP(src=any_src_addr,
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dst=ip_tag_bridged) /
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UDP(sport=1234, dport=1234) /
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Raw('\xa5' * 100))
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rx = self.send_and_expect(self.pg2, pkt_tag_to_tag * 65, self.pg3)
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self.assert_same_mac_addr(pkt_tag_to_tag, rx)
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self.assert_has_vlan_tag(93, rx)
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#
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# Tag to non-Tag
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#
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pkt_tag_to_non_tag = (Ether(src=self.pg2.remote_mac,
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dst=self.loop0.local_mac) /
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Dot1Q(vlan=92) /
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IP(src=any_src_addr,
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dst=ip_non_tag_bridged) /
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UDP(sport=1234, dport=1234) /
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Raw('\xa5' * 100))
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rx = self.send_and_expect(self.pg2, pkt_tag_to_non_tag * 65, self.pg1)
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self.assert_same_mac_addr(pkt_tag_to_tag, rx)
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self.assert_has_no_tag(rx)
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#
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# Add an output L3 ACL that will block the traffic
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#
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rule_1 = ({'is_permit': 0,
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'is_ipv6': 0,
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'proto': 17,
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'srcport_or_icmptype_first': 1234,
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'srcport_or_icmptype_last': 1234,
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'src_ip_prefix_len': 32,
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'src_ip_addr': inet_pton(AF_INET, any_src_addr),
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'dstport_or_icmpcode_first': 1234,
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'dstport_or_icmpcode_last': 1234,
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'dst_ip_prefix_len': 32,
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'dst_ip_addr': inet_pton(AF_INET, ip_non_tag_bridged)})
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acl = self.vapi.acl_add_replace(acl_index=4294967295,
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r=[rule_1])
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#
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# Apply the ACL on the output interface
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#
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self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
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0,
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[acl.acl_index])
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#
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# Send packet's that should match the ACL and be dropped
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#
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rx = self.send_and_assert_no_replies(self.pg2, pkt_tag_to_non_tag * 65)
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#
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# cleanup
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#
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self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
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0, [])
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self.vapi.acl_del(acl.acl_index)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=self.pg0.sw_if_index, bd_id=1, enable=0)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=self.pg1.sw_if_index, bd_id=1, enable=0)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1, enable=0)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1, enable=0)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=self.loop0.sw_if_index, bd_id=1,
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port_type=L2_PORT_TYPE.BVI, enable=0)
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#
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# Do a FIB dump to make sure the paths are correctly reported as DVR
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#
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routes = self.vapi.ip_fib_dump()
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for r in routes:
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if (inet_pton(AF_INET, ip_tag_bridged) == r.address):
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self.assertEqual(r.path[0].sw_if_index,
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sub_if_on_pg3.sw_if_index)
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self.assertEqual(r.path[0].is_dvr, 1)
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if (inet_pton(AF_INET, ip_non_tag_bridged) == r.address):
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self.assertEqual(r.path[0].sw_if_index,
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self.pg1.sw_if_index)
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self.assertEqual(r.path[0].is_dvr, 1)
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#
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# the explicit route delete is require so it happens before
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# the sbu-interface delete. subinterface delete is required
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# because that object type does not use the object registry
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#
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route_no_tag.remove_vpp_config()
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route_with_tag.remove_vpp_config()
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sub_if_on_pg3.remove_vpp_config()
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sub_if_on_pg2.remove_vpp_config()
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def test_l2_emulation(self):
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""" L2 Emulation """
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#
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# non distinct L3 packets, in the tag/non-tag combos
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#
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pkt_no_tag = (Ether(src=self.pg0.remote_mac,
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dst=self.pg1.remote_mac) /
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IP(src="2.2.2.2",
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dst="1.1.1.1") /
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UDP(sport=1234, dport=1234) /
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Raw('\xa5' * 100))
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pkt_to_tag = (Ether(src=self.pg0.remote_mac,
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dst=self.pg2.remote_mac) /
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IP(src="2.2.2.2",
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dst="1.1.1.2") /
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UDP(sport=1234, dport=1234) /
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Raw('\xa5' * 100))
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pkt_from_tag = (Ether(src=self.pg3.remote_mac,
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dst=self.pg2.remote_mac) /
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Dot1Q(vlan=93) /
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IP(src="2.2.2.2",
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dst="1.1.1.1") /
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UDP(sport=1234, dport=1234) /
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Raw('\xa5' * 100))
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pkt_from_to_tag = (Ether(src=self.pg3.remote_mac,
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dst=self.pg2.remote_mac) /
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Dot1Q(vlan=93) /
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IP(src="2.2.2.2",
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dst="1.1.1.2") /
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UDP(sport=1234, dport=1234) /
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Raw('\xa5' * 100))
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pkt_bcast = (Ether(src=self.pg0.remote_mac,
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dst="ff:ff:ff:ff:ff:ff") /
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IP(src="2.2.2.2",
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dst="255.255.255.255") /
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UDP(sport=1234, dport=1234) /
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Raw('\xa5' * 100))
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#
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# A couple of sub-interfaces for tags
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#
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sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
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sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
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sub_if_on_pg2.admin_up()
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sub_if_on_pg3.admin_up()
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#
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# Put all the interfaces into a new bridge domain
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#
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=self.pg0.sw_if_index, bd_id=1)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=self.pg1.sw_if_index, bd_id=1)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1)
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self.vapi.l2_interface_vlan_tag_rewrite(
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sw_if_index=sub_if_on_pg2.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
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push_dot1q=92)
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self.vapi.l2_interface_vlan_tag_rewrite(
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sw_if_index=sub_if_on_pg3.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
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push_dot1q=93)
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#
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# Disable UU flooding, learning and ARP termination. makes this test
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# easier as unicast packets are dropped if not extracted.
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#
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self.vapi.bridge_flags(bd_id=1, is_set=0,
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flags=(1 << 0) | (1 << 3) | (1 << 4))
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#
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# Add a DVR route to steer traffic at L3
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#
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route_1 = VppIpRoute(self, "1.1.1.1", 32,
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[VppRoutePath("0.0.0.0",
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self.pg1.sw_if_index,
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is_dvr=1)])
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route_2 = VppIpRoute(self, "1.1.1.2", 32,
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[VppRoutePath("0.0.0.0",
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sub_if_on_pg2.sw_if_index,
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is_dvr=1)])
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route_1.add_vpp_config()
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route_2.add_vpp_config()
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#
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# packets are dropped because bridge does not flood unknown unicast
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#
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self.send_and_assert_no_replies(self.pg0, pkt_no_tag)
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#
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# Enable L3 extraction on pgs
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#
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self.vapi.l2_emulation(self.pg0.sw_if_index)
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self.vapi.l2_emulation(self.pg1.sw_if_index)
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self.vapi.l2_emulation(sub_if_on_pg2.sw_if_index)
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self.vapi.l2_emulation(sub_if_on_pg3.sw_if_index)
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#
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# now we expect the packet forward according to the DVR route
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#
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rx = self.send_and_expect(self.pg0, pkt_no_tag * 65, self.pg1)
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self.assert_same_mac_addr(pkt_no_tag, rx)
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self.assert_has_no_tag(rx)
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rx = self.send_and_expect(self.pg0, pkt_to_tag * 65, self.pg2)
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self.assert_same_mac_addr(pkt_to_tag, rx)
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self.assert_has_vlan_tag(92, rx)
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rx = self.send_and_expect(self.pg3, pkt_from_tag * 65, self.pg1)
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self.assert_same_mac_addr(pkt_from_tag, rx)
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self.assert_has_no_tag(rx)
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rx = self.send_and_expect(self.pg3, pkt_from_to_tag * 65, self.pg2)
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self.assert_same_mac_addr(pkt_from_tag, rx)
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self.assert_has_vlan_tag(92, rx)
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#
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# but broadcast packets are still flooded
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#
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self.send_and_expect(self.pg0, pkt_bcast * 33, self.pg2)
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#
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# cleanup
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#
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self.vapi.l2_emulation(self.pg0.sw_if_index,
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enable=0)
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self.vapi.l2_emulation(self.pg1.sw_if_index,
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enable=0)
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self.vapi.l2_emulation(sub_if_on_pg2.sw_if_index,
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enable=0)
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self.vapi.l2_emulation(sub_if_on_pg3.sw_if_index,
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enable=0)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=self.pg0.sw_if_index, bd_id=1, enable=0)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=self.pg1.sw_if_index, bd_id=1, enable=0)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1, enable=0)
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self.vapi.sw_interface_set_l2_bridge(
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rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1, enable=0)
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route_1.remove_vpp_config()
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route_2.remove_vpp_config()
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sub_if_on_pg3.remove_vpp_config()
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sub_if_on_pg2.remove_vpp_config()
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if __name__ == '__main__':
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unittest.main(testRunner=VppTestRunner)
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