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#!/usr/bin/env python3
import unittest
import socket
from framework import VppTestCase, VppTestRunner
from vpp_ip_route import VppIpRoute, VppRoutePath
from vpp_l2 import L2_PORT_TYPE, BRIDGE_FLAGS
from scapy.packet import Raw
from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP
NUM_PKTS = 67
class TestL2Flood(VppTestCase):
""" L2-flood """
@classmethod
def setUpClass(cls):
super(TestL2Flood, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestL2Flood, cls).tearDownClass()
def setUp(self):
super(TestL2Flood, self).setUp()
# 12 l2 interface and one l3
self.create_pg_interfaces(range(13))
self.create_bvi_interfaces(1)
for i in self.pg_interfaces:
i.admin_up()
for i in self.bvi_interfaces:
i.admin_up()
self.pg12.config_ip4()
self.pg12.resolve_arp()
self.bvi0.config_ip4()
def tearDown(self):
self.pg12.unconfig_ip4()
self.bvi0.unconfig_ip4()
for i in self.pg_interfaces:
i.admin_down()
for i in self.bvi_interfaces:
i.admin_down()
super(TestL2Flood, self).tearDown()
def test_flood(self):
""" L2 Flood Tests """
#
# Create a single bridge Domain
#
self.vapi.bridge_domain_add_del(bd_id=1)
#
# add each interface to the BD. 3 interfaces per split horizon group
#
for i in self.pg_interfaces[0:4]:
self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=i.sw_if_index,
bd_id=1, shg=0)
for i in self.pg_interfaces[4:8]:
self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=i.sw_if_index,
bd_id=1, shg=1)
for i in self.pg_interfaces[8:12]:
self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=i.sw_if_index,
bd_id=1, shg=2)
for i in self.bvi_interfaces:
self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=i.sw_if_index,
bd_id=1, shg=2,
port_type=L2_PORT_TYPE.BVI)
p = (Ether(dst="ff:ff:ff:ff:ff:ff",
src="00:00:de:ad:be:ef") /
IP(src="10.10.10.10", dst="1.1.1.1") /
UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
#
# input on pg0 expect copies on pg1->11
# this is in SHG=0 so its flooded to all, expect the pg0 since that's
# the ingress link
#
self.pg0.add_stream(p*NUM_PKTS)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
for i in self.pg_interfaces[1:12]:
rx0 = i.get_capture(NUM_PKTS, timeout=1)
#
# input on pg4 (SHG=1) expect copies on pg0->3 (SHG=0)
# and pg8->11 (SHG=2)
#
self.pg4.add_stream(p*NUM_PKTS)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
for i in self.pg_interfaces[:4]:
rx0 = i.get_capture(NUM_PKTS, timeout=1)
for i in self.pg_interfaces[8:12]:
rx0 = i.get_capture(NUM_PKTS, timeout=1)
for i in self.pg_interfaces[4:8]:
i.assert_nothing_captured(remark="Different SH group")
#
# An IP route so the packet that hits the BVI is sent out of pg12
#
ip_route = VppIpRoute(self, "1.1.1.1", 32,
[VppRoutePath(self.pg12.remote_ip4,
self.pg12.sw_if_index)])
ip_route.add_vpp_config()
self.logger.info(self.vapi.cli("sh bridge 1 detail"))
#
# input on pg0 expect copies on pg1->12
# this is in SHG=0 so its flooded to all, expect the pg0 since that's
# the ingress link
#
self.pg0.add_stream(p*NUM_PKTS)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
for i in self.pg_interfaces[1:]:
rx0 = i.get_capture(NUM_PKTS, timeout=1)
#
# input on pg4 (SHG=1) expect copies on pg0->3 (SHG=0)
# and pg8->12 (SHG=2)
#
self.pg4.add_stream(p*NUM_PKTS)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
for i in self.pg_interfaces[:4]:
rx0 = i.get_capture(NUM_PKTS, timeout=1)
for i in self.pg_interfaces[8:13]:
rx0 = i.get_capture(NUM_PKTS, timeout=1)
for i in self.pg_interfaces[4:8]:
i.assert_nothing_captured(remark="Different SH group")
#
# cleanup
#
for i in self.pg_interfaces[:12]:
self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=i.sw_if_index,
bd_id=1, enable=0)
for i in self.bvi_interfaces:
self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=i.sw_if_index,
bd_id=1, shg=2,
port_type=L2_PORT_TYPE.BVI,
enable=0)
self.vapi.bridge_domain_add_del(bd_id=1, is_add=0)
def test_flood_one(self):
""" L2 no-Flood Test """
#
# Create a single bridge Domain
#
self.vapi.bridge_domain_add_del(bd_id=1)
#
# add 2 interfaces to the BD. this means a flood goes to only
# one member
#
for i in self.pg_interfaces[:2]:
self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=i.sw_if_index,
bd_id=1, shg=0)
p = (Ether(dst="ff:ff:ff:ff:ff:ff",
src="00:00:de:ad:be:ef") /
IP(src="10.10.10.10", dst="1.1.1.1") /
UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
#
# input on pg0 expect copies on pg1
#
self.send_and_expect(self.pg0, p*NUM_PKTS, self.pg1)
#
# cleanup
#
for i in self.pg_interfaces[:2]:
self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=i.sw_if_index,
bd_id=1, enable=0)
self.vapi.bridge_domain_add_del(bd_id=1, is_add=0)
def test_uu_fwd(self):
""" UU Flood """
#
# Create a single bridge Domain
#
self.vapi.bridge_domain_add_del(bd_id=1, uu_flood=1)
#
# add each interface to the BD. 3 interfaces per split horizon group
#
for i in self.pg_interfaces[0:4]:
self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=i.sw_if_index,
bd_id=1, shg=0)
#
# an unknown unicast and broadcast packets
#
p_uu = (Ether(dst="00:00:00:c1:5c:00",
src="00:00:de:ad:be:ef") /
IP(src="10.10.10.10", dst="1.1.1.1") /
UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
p_bm = (Ether(dst="ff:ff:ff:ff:ff:ff",
src="00:00:de:ad:be:ef") /
IP(src="10.10.10.10", dst="1.1.1.1") /
UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
#
# input on pg0, expected copies on pg1->4
#
self.pg0.add_stream(p_uu*NUM_PKTS)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
for i in self.pg_interfaces[1:4]:
rx0 = i.get_capture(NUM_PKTS, timeout=1)
self.pg0.add_stream(p_bm*NUM_PKTS)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
for i in self.pg_interfaces[1:4]:
rx0 = i.get_capture(NUM_PKTS, timeout=1)
#
# use pg8 as the uu-fwd interface
#
self.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=self.pg8.sw_if_index, bd_id=1, shg=0,
port_type=L2_PORT_TYPE.UU_FWD)
#
# expect the UU packet on the uu-fwd interface and not be flooded
#
self.pg0.add_stream(p_uu*NUM_PKTS)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx0 = self.pg8.get_capture(NUM_PKTS, timeout=1)
for i in self.pg_interfaces[0:4]:
i.assert_nothing_captured(remark="UU not flooded")
self.pg0.add_stream(p_bm*NUM_PKTS)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
for i in self.pg_interfaces[1:4]:
rx0 = i.get_capture(NUM_PKTS, timeout=1)
#
# remove the uu-fwd interface and expect UU to be flooded again
#
self.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=self.pg8.sw_if_index, bd_id=1, shg=0,
port_type=L2_PORT_TYPE.UU_FWD, enable=0)
self.pg0.add_stream(p_uu*NUM_PKTS)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
for i in self.pg_interfaces[1:4]:
rx0 = i.get_capture(NUM_PKTS, timeout=1)
#
# change the BD config to not support UU-flood
#
self.vapi.bridge_flags(bd_id=1, is_set=0, flags=BRIDGE_FLAGS.UU_FLOOD)
self.send_and_assert_no_replies(self.pg0, p_uu)
#
# re-add the uu-fwd interface
#
self.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=self.pg8.sw_if_index, bd_id=1, shg=0,
port_type=L2_PORT_TYPE.UU_FWD)
self.logger.info(self.vapi.cli("sh bridge 1 detail"))
self.pg0.add_stream(p_uu*NUM_PKTS)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx0 = self.pg8.get_capture(NUM_PKTS, timeout=1)
for i in self.pg_interfaces[0:4]:
i.assert_nothing_captured(remark="UU not flooded")
#
# remove the uu-fwd interface
#
self.vapi.sw_interface_set_l2_bridge(
rx_sw_if_index=self.pg8.sw_if_index, bd_id=1, shg=0,
port_type=L2_PORT_TYPE.UU_FWD, enable=0)
self.send_and_assert_no_replies(self.pg0, p_uu)
#
# cleanup
#
for i in self.pg_interfaces[:4]:
self.vapi.sw_interface_set_l2_bridge(rx_sw_if_index=i.sw_if_index,
bd_id=1, enable=0)
self.vapi.bridge_domain_add_del(bd_id=1, is_add=0)
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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