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|
#!/usr/bin/env python
import unittest
from framework import VppTestCase, VppTestRunner
from vpp_sub_interface import VppSubInterface, VppDot1QSubint, VppDot1ADSubint
from vpp_ip_route import IpMRoute, MRoutePath, MFibSignal
from scapy.packet import Raw
from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP, getmacbyip
from scapy.layers.inet6 import IPv6, getmacbyip6
from util import ppp
class MRouteItfFlags:
MFIB_ITF_FLAG_NONE = 0
MFIB_ITF_FLAG_NEGATE_SIGNAL = 1
MFIB_ITF_FLAG_ACCEPT = 2
MFIB_ITF_FLAG_FORWARD = 4
MFIB_ITF_FLAG_SIGNAL_PRESENT = 8
MFIB_ITF_FLAG_INTERNAL_COPY = 16
class MRouteEntryFlags:
MFIB_ENTRY_FLAG_NONE = 0
MFIB_ENTRY_FLAG_SIGNAL = 1
MFIB_ENTRY_FLAG_DROP = 2
MFIB_ENTRY_FLAG_CONNECTED = 4
MFIB_ENTRY_FLAG_INHERIT_ACCEPT = 8
class TestIPMcast(VppTestCase):
""" IP Multicast Test Case """
def setUp(self):
super(TestIPMcast, self).setUp()
# create 4 pg interfaces
self.create_pg_interfaces(range(4))
# setup interfaces
for i in self.pg_interfaces:
i.admin_up()
i.config_ip4()
i.config_ip6()
i.resolve_arp()
i.resolve_ndp()
def create_stream_ip4(self, src_if, src_ip, dst_ip):
pkts = []
for i in range(0, 65):
info = self.create_packet_info(src_if, src_if)
payload = self.info_to_payload(info)
p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
IP(src=src_ip, dst=dst_ip) /
UDP(sport=1234, dport=1234) /
Raw(payload))
info.data = p.copy()
pkts.append(p)
return pkts
def create_stream_ip6(self, src_if, src_ip, dst_ip):
pkts = []
for i in range(0, 65):
info = self.create_packet_info(src_if, src_if)
payload = self.info_to_payload(info)
p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
IPv6(src=src_ip, dst=dst_ip) /
UDP(sport=1234, dport=1234) /
Raw(payload))
info.data = p.copy()
pkts.append(p)
return pkts
def verify_filter(self, capture, sent):
if not len(capture) == len(sent):
# filter out any IPv6 RAs from the captur
for p in capture:
if (p.haslayer(IPv6)):
capture.remove(p)
return capture
def verify_capture_ip4(self, src_if, sent):
rxd = self.pg1.get_capture(65)
try:
capture = self.verify_filter(rxd, sent)
self.assertEqual(len(capture), len(sent))
for i in range(len(capture)):
tx = sent[i]
rx = capture[i]
# the rx'd packet has the MPLS label popped
eth = rx[Ether]
self.assertEqual(eth.type, 0x800)
tx_ip = tx[IP]
rx_ip = rx[IP]
# check the MAC address on the RX'd packet is correctly formed
self.assertEqual(eth.dst, getmacbyip(rx_ip.dst))
self.assertEqual(rx_ip.src, tx_ip.src)
self.assertEqual(rx_ip.dst, tx_ip.dst)
# IP processing post pop has decremented the TTL
self.assertEqual(rx_ip.ttl + 1, tx_ip.ttl)
except:
raise
def verify_capture_ip6(self, src_if, sent):
capture = self.pg1.get_capture(65)
self.assertEqual(len(capture), len(sent))
for i in range(len(capture)):
tx = sent[i]
rx = capture[i]
# the rx'd packet has the MPLS label popped
eth = rx[Ether]
self.assertEqual(eth.type, 0x86DD)
tx_ip = tx[IPv6]
rx_ip = rx[IPv6]
# check the MAC address on the RX'd packet is correctly formed
self.assertEqual(eth.dst, getmacbyip6(rx_ip.dst))
self.assertEqual(rx_ip.src, tx_ip.src)
self.assertEqual(rx_ip.dst, tx_ip.dst)
# IP processing post pop has decremented the TTL
self.assertEqual(rx_ip.hlim + 1, tx_ip.hlim)
def test_ip_mcast(self):
""" IP Multicast Replication """
#
# a stream that matches the default route. gets dropped.
#
self.vapi.cli("clear trace")
tx = self.create_stream_ip4(self.pg0, "1.1.1.1", "232.1.1.1")
self.pg0.add_stream(tx)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.pg0.assert_nothing_captured(
remark="IP multicast packets forwarded on default route")
#
# A (*,G).
# one accepting interface, pg0, 3 forwarding interfaces
#
route_232_1_1_1 = IpMRoute(
self,
"0.0.0.0",
"232.1.1.1", 32,
MRouteEntryFlags.MFIB_ENTRY_FLAG_NONE,
[MRoutePath(self.pg0.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_ACCEPT),
MRoutePath(self.pg1.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD),
MRoutePath(self.pg2.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD),
MRoutePath(self.pg3.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD)])
route_232_1_1_1.add_vpp_config()
#
# An (S,G).
# one accepting interface, pg0, 2 forwarding interfaces
#
route_1_1_1_1_232_1_1_1 = IpMRoute(
self,
"1.1.1.1",
"232.1.1.1", 64,
MRouteEntryFlags.MFIB_ENTRY_FLAG_NONE,
[MRoutePath(self.pg0.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_ACCEPT),
MRoutePath(self.pg1.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD),
MRoutePath(self.pg2.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD)])
route_1_1_1_1_232_1_1_1.add_vpp_config()
#
# An (*,G/m).
# one accepting interface, pg0, 1 forwarding interfaces
#
route_232 = IpMRoute(
self,
"0.0.0.0",
"232.0.0.0", 8,
MRouteEntryFlags.MFIB_ENTRY_FLAG_NONE,
[MRoutePath(self.pg0.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_ACCEPT),
MRoutePath(self.pg1.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD)])
route_232.add_vpp_config()
#
# a stream that matches the route for (1.1.1.1,232.1.1.1)
#
self.vapi.cli("clear trace")
tx = self.create_stream_ip4(self.pg0, "1.1.1.1", "232.1.1.1")
self.pg0.add_stream(tx)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
# We expect replications on Pg1, 2,
self.verify_capture_ip4(self.pg1, tx)
self.verify_capture_ip4(self.pg2, tx)
# no replications on Pg0
self.pg0.assert_nothing_captured(
remark="IP multicast packets forwarded on PG0")
self.pg3.assert_nothing_captured(
remark="IP multicast packets forwarded on PG3")
#
# a stream that matches the route for (*,232.0.0.0/8)
# Send packets with the 9th bit set so we test the correct clearing
# of that bit in the mac rewrite
#
self.vapi.cli("clear trace")
tx = self.create_stream_ip4(self.pg0, "1.1.1.1", "232.255.255.255")
self.pg0.add_stream(tx)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
# We expect replications on Pg1 only
self.verify_capture_ip4(self.pg1, tx)
# no replications on Pg0, Pg2 not Pg3
self.pg0.assert_nothing_captured(
remark="IP multicast packets forwarded on PG0")
self.pg2.assert_nothing_captured(
remark="IP multicast packets forwarded on PG2")
self.pg3.assert_nothing_captured(
remark="IP multicast packets forwarded on PG3")
#
# a stream that matches the route for (*,232.1.1.1)
#
self.vapi.cli("clear trace")
tx = self.create_stream_ip4(self.pg0, "1.1.1.2", "232.1.1.1")
self.pg0.add_stream(tx)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
# We expect replications on Pg1, 2, 3.
self.verify_capture_ip4(self.pg1, tx)
self.verify_capture_ip4(self.pg2, tx)
self.verify_capture_ip4(self.pg3, tx)
# no replications on Pg0
self.pg0.assert_nothing_captured(
remark="IP multicast packets forwarded on PG0")
route_232_1_1_1.remove_vpp_config()
route_1_1_1_1_232_1_1_1.remove_vpp_config()
route_232.remove_vpp_config()
def test_ip6_mcast(self):
""" IPv6 Multicast Replication """
#
# a stream that matches the default route. gets dropped.
#
self.vapi.cli("clear trace")
tx = self.create_stream_ip6(self.pg0, "2001::1", "ff01::1")
self.pg0.add_stream(tx)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.pg0.assert_nothing_captured(
remark="IPv6 multicast packets forwarded on default route")
#
# A (*,G).
# one accepting interface, pg0, 3 forwarding interfaces
#
route_ff01_1 = IpMRoute(
self,
"::",
"ff01::1", 128,
MRouteEntryFlags.MFIB_ENTRY_FLAG_NONE,
[MRoutePath(self.pg0.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_ACCEPT),
MRoutePath(self.pg1.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD),
MRoutePath(self.pg2.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD),
MRoutePath(self.pg3.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD)],
is_ip6=1)
route_ff01_1.add_vpp_config()
#
# An (S,G).
# one accepting interface, pg0, 2 forwarding interfaces
#
route_2001_ff01_1 = IpMRoute(
self,
"2001::1",
"ff01::1", 256,
MRouteEntryFlags.MFIB_ENTRY_FLAG_NONE,
[MRoutePath(self.pg0.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_ACCEPT),
MRoutePath(self.pg1.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD),
MRoutePath(self.pg2.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD)],
is_ip6=1)
route_2001_ff01_1.add_vpp_config()
#
# An (*,G/m).
# one accepting interface, pg0, 1 forwarding interface
#
route_ff01 = IpMRoute(
self,
"::",
"ff01::", 16,
MRouteEntryFlags.MFIB_ENTRY_FLAG_NONE,
[MRoutePath(self.pg0.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_ACCEPT),
MRoutePath(self.pg1.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD)],
is_ip6=1)
route_ff01.add_vpp_config()
#
# a stream that matches the route for (*, ff01::/16)
#
self.vapi.cli("clear trace")
tx = self.create_stream_ip6(self.pg0, "2002::1", "ff01:2::255")
self.pg0.add_stream(tx)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
# We expect replications on Pg1
self.verify_capture_ip6(self.pg1, tx)
# no replications on Pg0, Pg3
self.pg0.assert_nothing_captured(
remark="IP multicast packets forwarded on PG0")
self.pg2.assert_nothing_captured(
remark="IP multicast packets forwarded on PG2")
self.pg3.assert_nothing_captured(
remark="IP multicast packets forwarded on PG3")
#
# a stream that matches the route for (*,ff01::1)
#
self.vapi.cli("clear trace")
tx = self.create_stream_ip6(self.pg0, "2002::2", "ff01::1")
self.pg0.add_stream(tx)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
# We expect replications on Pg1, 2, 3.
self.verify_capture_ip6(self.pg1, tx)
self.verify_capture_ip6(self.pg2, tx)
self.verify_capture_ip6(self.pg3, tx)
# no replications on Pg0
self.pg0.assert_nothing_captured(
remark="IPv6 multicast packets forwarded on PG0")
#
# a stream that matches the route for (2001::1, ff00::1)
#
self.vapi.cli("clear trace")
tx = self.create_stream_ip6(self.pg0, "2001::1", "ff01::1")
self.pg0.add_stream(tx)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
# We expect replications on Pg1, 2,
self.verify_capture_ip6(self.pg1, tx)
self.verify_capture_ip6(self.pg2, tx)
# no replications on Pg0, Pg3
self.pg0.assert_nothing_captured(
remark="IP multicast packets forwarded on PG0")
self.pg3.assert_nothing_captured(
remark="IP multicast packets forwarded on PG3")
route_ff01.remove_vpp_config()
route_ff01_1.remove_vpp_config()
route_2001_ff01_1.remove_vpp_config()
def _mcast_connected_send_stream(self, dst_ip):
self.vapi.cli("clear trace")
tx = self.create_stream_ip4(self.pg0,
self.pg0.remote_ip4,
dst_ip)
self.pg0.add_stream(tx)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
# We expect replications on Pg1.
self.verify_capture_ip4(self.pg1, tx)
return tx
def test_ip_mcast_connected(self):
""" IP Multicast Connected Source check """
#
# A (*,G).
# one accepting interface, pg0, 1 forwarding interfaces
#
route_232_1_1_1 = IpMRoute(
self,
"0.0.0.0",
"232.1.1.1", 32,
MRouteEntryFlags.MFIB_ENTRY_FLAG_NONE,
[MRoutePath(self.pg0.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_ACCEPT),
MRoutePath(self.pg1.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD)])
route_232_1_1_1.add_vpp_config()
route_232_1_1_1.update_entry_flags(
MRouteEntryFlags.MFIB_ENTRY_FLAG_CONNECTED)
#
# Now the (*,G) is present, send from connected source
#
tx = self._mcast_connected_send_stream("232.1.1.1")
#
# Constrct a representation of the signal we expect on pg0
#
signal_232_1_1_1_itf_0 = MFibSignal(self,
route_232_1_1_1,
self.pg0.sw_if_index,
tx[0])
#
# read the only expected signal
#
signals = self.vapi.mfib_signal_dump()
self.assertEqual(1, len(signals))
signal_232_1_1_1_itf_0.compare(signals[0])
#
# reading the signal allows for the generation of another
# so send more packets and expect the next signal
#
tx = self._mcast_connected_send_stream("232.1.1.1")
signals = self.vapi.mfib_signal_dump()
self.assertEqual(1, len(signals))
signal_232_1_1_1_itf_0.compare(signals[0])
#
# A Second entry with connected check
# one accepting interface, pg0, 1 forwarding interfaces
#
route_232_1_1_2 = IpMRoute(
self,
"0.0.0.0",
"232.1.1.2", 32,
MRouteEntryFlags.MFIB_ENTRY_FLAG_NONE,
[MRoutePath(self.pg0.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_ACCEPT),
MRoutePath(self.pg1.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD)])
route_232_1_1_2.add_vpp_config()
route_232_1_1_2.update_entry_flags(
MRouteEntryFlags.MFIB_ENTRY_FLAG_CONNECTED)
#
# Send traffic to both entries. One read should net us two signals
#
signal_232_1_1_2_itf_0 = MFibSignal(self,
route_232_1_1_2,
self.pg0.sw_if_index,
tx[0])
tx = self._mcast_connected_send_stream("232.1.1.1")
tx2 = self._mcast_connected_send_stream("232.1.1.2")
#
# read the only expected signal
#
signals = self.vapi.mfib_signal_dump()
self.assertEqual(2, len(signals))
signal_232_1_1_1_itf_0.compare(signals[1])
signal_232_1_1_2_itf_0.compare(signals[0])
route_232_1_1_1.remove_vpp_config()
route_232_1_1_2.remove_vpp_config()
def test_ip_mcast_signal(self):
""" IP Multicast Signal """
#
# A (*,G).
# one accepting interface, pg0, 1 forwarding interfaces
#
route_232_1_1_1 = IpMRoute(
self,
"0.0.0.0",
"232.1.1.1", 32,
MRouteEntryFlags.MFIB_ENTRY_FLAG_NONE,
[MRoutePath(self.pg0.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_ACCEPT),
MRoutePath(self.pg1.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_FORWARD)])
route_232_1_1_1.add_vpp_config()
route_232_1_1_1.update_entry_flags(
MRouteEntryFlags.MFIB_ENTRY_FLAG_SIGNAL)
#
# Now the (*,G) is present, send from connected source
#
tx = self._mcast_connected_send_stream("232.1.1.1")
#
# Constrct a representation of the signal we expect on pg0
#
signal_232_1_1_1_itf_0 = MFibSignal(self,
route_232_1_1_1,
self.pg0.sw_if_index,
tx[0])
#
# read the only expected signal
#
signals = self.vapi.mfib_signal_dump()
self.assertEqual(1, len(signals))
signal_232_1_1_1_itf_0.compare(signals[0])
#
# reading the signal allows for the generation of another
# so send more packets and expect the next signal
#
tx = self._mcast_connected_send_stream("232.1.1.1")
signals = self.vapi.mfib_signal_dump()
self.assertEqual(1, len(signals))
signal_232_1_1_1_itf_0.compare(signals[0])
#
# Set the negate-signal on the accepting interval - the signals
# should stop
#
route_232_1_1_1.update_path_flags(
self.pg0.sw_if_index,
(MRouteItfFlags.MFIB_ITF_FLAG_ACCEPT |
MRouteItfFlags.MFIB_ITF_FLAG_NEGATE_SIGNAL))
tx = self._mcast_connected_send_stream("232.1.1.1")
signals = self.vapi.mfib_signal_dump()
self.assertEqual(0, len(signals))
#
# Clear the SIGNAL flag on the entry and the signals should
# come back since the interface is still NEGATE-SIGNAL
#
route_232_1_1_1.update_entry_flags(
MRouteEntryFlags.MFIB_ENTRY_FLAG_NONE)
tx = self._mcast_connected_send_stream("232.1.1.1")
signals = self.vapi.mfib_signal_dump()
self.assertEqual(1, len(signals))
signal_232_1_1_1_itf_0.compare(signals[0])
#
# Lastly remove the NEGATE-SIGNAL from the interface and the
# signals should stop
#
route_232_1_1_1.update_path_flags(self.pg0.sw_if_index,
MRouteItfFlags.MFIB_ITF_FLAG_ACCEPT)
tx = self._mcast_connected_send_stream("232.1.1.1")
signals = self.vapi.mfib_signal_dump()
self.assertEqual(0, len(signals))
#
# Cleanup
#
route_232_1_1_1.remove_vpp_config()
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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