#!/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
from socket import AF_INET, inet_pton
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,
is_dvr=1)])
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 * 65, 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,
is_dvr=1)])
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 * 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)
#
# 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 * 65)
#
# 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(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)
#
# Do a FIB dump to make sure the paths are correctly reported as DVR
#
routes = self.vapi.ip_fib_dump()
for r in routes:
if (inet_pton(AF_INET, ip_tag_bridged) == r.address):
self.assertEqual(r.path[0].sw_if_index,
sub_if_on_pg3.sw_if_index)
self.assertEqual(r.path[0].is_dvr, 1)
if (inet_pton(AF_INET, ip_non_tag_bridged) == r.address):
self.assertEqual(r.path[0].sw_if_index,
self.pg1.sw_if_index)
self.assertEqual(r.path[0].is_dvr, 1)
#
# 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 ARP 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,
is_dvr=1)])
route_2 = VppIpRoute(self, "1.1.1.2", 32,
[VppRoutePath("0.0.0.0",
sub_if_on_pg2.sw_if_index,
is_dvr=1)])
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.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)
