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#!/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
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):
""" IPv4 Load-Balancing """
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 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_no_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_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_tag)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg3.get_capture(1)
self.assertEqual(rx[0][Ether].dst, pkt_tag[Ether].dst)
self.assertEqual(rx[0][Ether].src, pkt_tag[Ether].src)
self.assertEqual(rx[0][Dot1Q].vlan, 93)
#
# 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))
self.pg2.add_stream(pkt_tag_to_tag)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg3.get_capture(1)
self.assertEqual(rx[0][Ether].dst, pkt_tag_to_tag[Ether].dst)
self.assertEqual(rx[0][Ether].src, pkt_tag_to_tag[Ether].src)
self.assertEqual(rx[0][Dot1Q].vlan, 93)
#
# 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))
self.pg2.add_stream(pkt_tag_to_non_tag)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
self.assertEqual(rx[0][Ether].dst, pkt_tag_to_tag[Ether].dst)
self.assertEqual(rx[0][Ether].src, pkt_tag_to_tag[Ether].src)
self.assertFalse(rx[0].haslayer(Dot1Q))
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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