#!/usr/bin/env python3 import unittest from framework import tag_fixme_vpp_workers from framework import VppTestCase, VppTestRunner from vpp_ip import DpoProto from vpp_ip_route import ( VppIpMRoute, VppMRoutePath, VppMFibSignal, VppIpTable, FibPathProto, FibPathType, ) from vpp_gre_interface import VppGreInterface from vpp_papi import VppEnum from scapy.packet import Raw from scapy.layers.l2 import Ether, GRE from scapy.layers.inet import IP, UDP, getmacbyip, ICMP from scapy.layers.inet6 import IPv6, getmacbyip6 # # The number of packets sent is set to 91 so that when we replicate more than 3 # times, which we do for some entries, we will generate more than 256 packets # to the next node in the VLIB graph. Thus we are testing the code's # correctness handling this over-flow. # It's also an odd number so we hit any single loops. # N_PKTS_IN_STREAM = 91 class TestMFIB(VppTestCase): """MFIB Test Case""" @classmethod def setUpClass(cls): super(TestMFIB, cls).setUpClass() @classmethod def tearDownClass(cls): super(TestMFIB, cls).tearDownClass() def setUp(self): super(TestMFIB, self).setUp() def test_mfib(self): """MFIB Unit Tests""" error = self.vapi.cli("test mfib") if error: self.logger.critical(error) self.assertNotIn("Failed", error) @tag_fixme_vpp_workers class TestIPMcast(VppTestCase): """IP Multicast Test Case""" @classmethod def setUpClass(cls): super(TestIPMcast, cls).setUpClass() @classmethod def tearDownClass(cls): super(TestIPMcast, cls).tearDownClass() def setUp(self): super(TestIPMcast, self).setUp() # create 8 pg interfaces self.create_pg_interfaces(range(9)) # setup interfaces for i in self.pg_interfaces[:8]: i.admin_up() i.config_ip4() i.config_ip6() i.resolve_arp() i.resolve_ndp() # one more in a vrf tbl4 = VppIpTable(self, 10) tbl4.add_vpp_config() self.pg8.set_table_ip4(10) self.pg8.config_ip4() tbl6 = VppIpTable(self, 10, is_ip6=1) tbl6.add_vpp_config() self.pg8.set_table_ip6(10) self.pg8.config_ip6() def tearDown(self): for i in self.pg_interfaces: i.unconfig_ip4() i.unconfig_ip6() i.admin_down() self.pg8.set_table_ip4(0) self.pg8.set_table_ip6(0) super(TestIPMcast, self).tearDown() def create_stream_ip4(self, src_if, src_ip, dst_ip, payload_size=0): pkts = [] # default to small packet sizes p = ( Ether(dst=getmacbyip(dst_ip), src=src_if.remote_mac) / IP(src=src_ip, dst=dst_ip) / UDP(sport=1234, dport=1234) ) if not payload_size: payload_size = 64 - len(p) p = p / Raw(b"\xa5" * payload_size) for i in range(0, N_PKTS_IN_STREAM): pkts.append(p) return pkts def create_stream_ip6(self, src_if, src_ip, dst_ip): pkts = [] for i in range(0, N_PKTS_IN_STREAM): info = self.create_packet_info(src_if, src_if) payload = self.info_to_payload(info) p = ( Ether(dst=getmacbyip6(dst_ip), 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 capture for p in capture: if p.haslayer(IPv6): capture.remove(p) return capture def verify_capture_ip4(self, rx_if, sent, dst_mac=None): rxd = rx_if.get_capture(len(sent)) 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] eth = rx[Ether] self.assertEqual(eth.type, 0x800) tx_ip = tx[IP] rx_ip = rx[IP] if dst_mac is None: dst_mac = getmacbyip(rx_ip.dst) # check the MAC address on the RX'd packet is correctly formed self.assertEqual(eth.dst, dst_mac) 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, rx_if, sent): capture = rx_if.get_capture(len(sent)) self.assertEqual(len(capture), len(sent)) for i in range(len(capture)): tx = sent[i] rx = capture[i] 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""" MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t # # a stream that matches the default route. gets dropped. # self.vapi.cli("clear trace") self.vapi.cli("packet mac-filter pg0 on") self.vapi.cli("packet mac-filter pg1 on") self.vapi.cli("packet mac-filter pg2 on") self.vapi.cli("packet mac-filter pg4 on") self.vapi.cli("packet mac-filter pg5 on") self.vapi.cli("packet mac-filter pg6 on") self.vapi.cli("packet mac-filter pg7 on") 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" ) count = self.statistics.get_err_counter("/err/ip4-input/rpf_failure") self.assertEqual(count, len(tx)) # # A (*,G). # one accepting interface, pg0, 7 forwarding interfaces # many forwarding interfaces test the case where the replicate DPO # needs to use extra cache lines for the buckets. # route_232_1_1_1 = VppIpMRoute( self, "0.0.0.0", "232.1.1.1", 32, MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( self.pg0.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT ), VppMRoutePath( self.pg1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), VppMRoutePath( self.pg2.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), VppMRoutePath( self.pg3.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), VppMRoutePath( self.pg4.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), VppMRoutePath( self.pg5.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), VppMRoutePath( self.pg6.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), VppMRoutePath( self.pg7.sw_if_index, MRouteItfFlags.MFIB_API_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 = VppIpMRoute( self, "1.1.1.1", "232.1.1.1", 27, # any grp-len is ok when src is set MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( self.pg0.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT ), VppMRoutePath( self.pg1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), VppMRoutePath( self.pg2.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), ], ) route_1_1_1_1_232_1_1_1.add_vpp_config() # # An (S,G). # one accepting interface, pg0, 2 forwarding interfaces # that use unicast next-hops # route_1_1_1_1_232_1_1_2 = VppIpMRoute( self, "1.1.1.1", "232.1.1.2", 64, MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( self.pg0.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT ), VppMRoutePath( self.pg1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, nh=self.pg1.remote_ip4, ), VppMRoutePath( self.pg2.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, nh=self.pg2.remote_ip4, ), ], ) route_1_1_1_1_232_1_1_2.add_vpp_config() # # An (*,G/m). # one accepting interface, pg0, 1 forwarding interfaces # route_232 = VppIpMRoute( self, "0.0.0.0", "232.0.0.0", 8, MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( self.pg0.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT ), VppMRoutePath( self.pg1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), ], ) route_232.add_vpp_config() # # a stream that matches the route for (1.1.1.1,232.1.1.1) # small packets # 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.assertEqual(route_1_1_1_1_232_1_1_1.get_stats()["packets"], len(tx)) # We expect replications on Pg1->7 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 (1.1.1.1,232.1.1.1) # large packets # self.vapi.cli("clear trace") tx = self.create_stream_ip4(self.pg0, "1.1.1.1", "232.1.1.1", payload_size=1024) self.pg0.add_stream(tx) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # We expect replications on Pg1->7 self.verify_capture_ip4(self.pg1, tx) self.verify_capture_ip4(self.pg2, tx) self.assertEqual(route_1_1_1_1_232_1_1_1.get_stats()["packets"], 2 * len(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 to the unicast next-hops # self.vapi.cli("clear trace") tx = self.create_stream_ip4(self.pg0, "1.1.1.1", "232.1.1.2") self.pg0.add_stream(tx) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # We expect replications on Pg1->7 self.verify_capture_ip4(self.pg1, tx, dst_mac=self.pg1.remote_mac) self.verify_capture_ip4(self.pg2, tx, dst_mac=self.pg2.remote_mac) # no replications on Pg0 nor 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") # # 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) self.assertEqual(route_232.get_stats()["packets"], len(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->7 self.verify_capture_ip4(self.pg1, tx) self.verify_capture_ip4(self.pg2, tx) self.verify_capture_ip4(self.pg3, tx) self.verify_capture_ip4(self.pg4, tx) self.verify_capture_ip4(self.pg5, tx) self.verify_capture_ip4(self.pg6, tx) self.verify_capture_ip4(self.pg7, tx) # no replications on Pg0 self.pg0.assert_nothing_captured(remark="IP multicast packets forwarded on PG0") self.vapi.cli("packet mac-filter pg0 off") self.vapi.cli("packet mac-filter pg1 off") self.vapi.cli("packet mac-filter pg2 off") self.vapi.cli("packet mac-filter pg4 off") self.vapi.cli("packet mac-filter pg5 off") self.vapi.cli("packet mac-filter pg6 off") self.vapi.cli("packet mac-filter pg7 off") def test_ip6_mcast(self): """IPv6 Multicast Replication""" MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t self.vapi.cli("packet mac-filter pg0 on") self.vapi.cli("packet mac-filter pg1 on") self.vapi.cli("packet mac-filter pg2 on") self.vapi.cli("packet mac-filter pg4 on") self.vapi.cli("packet mac-filter pg5 on") self.vapi.cli("packet mac-filter pg6 on") self.vapi.cli("packet mac-filter pg7 on") # # 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 = VppIpMRoute( self, "::", "ff01::1", 128, MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( self.pg0.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6, ), VppMRoutePath( self.pg1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6, ), VppMRoutePath( self.pg2.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6, ), VppMRoutePath( self.pg3.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6, ), ], ) route_ff01_1.add_vpp_config() # # An (S,G). # one accepting interface, pg0, 2 forwarding interfaces # route_2001_ff01_1 = VppIpMRoute( self, "2001::1", "ff01::1", 0, # any grp-len is ok when src is set MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( self.pg0.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6, ), VppMRoutePath( self.pg1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6, ), VppMRoutePath( self.pg2.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6, ), ], ) route_2001_ff01_1.add_vpp_config() # # An (*,G/m). # one accepting interface, pg0, 1 forwarding interface # route_ff01 = VppIpMRoute( self, "::", "ff01::", 16, MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( self.pg0.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6, ), VppMRoutePath( self.pg1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6, ), ], ) route_ff01.add_vpp_config() # # a stream that matches the route for (*, ff01::/16) # sent on the non-accepting interface # self.vapi.cli("clear trace") tx = self.create_stream_ip6(self.pg1, "2002::1", "ff01:2::255") self.send_and_assert_no_replies(self.pg1, tx, "RPF miss") count = self.statistics.get_err_counter("/err/ip6-input/rpf_failure") self.assertEqual(count, 2 * len(tx)) # # a stream that matches the route for (*, ff01::/16) # sent on the accepting interface # 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") # # Bounce the interface and it should still work # self.pg1.admin_down() self.pg0.add_stream(tx) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.pg1.assert_nothing_captured( remark="IP multicast packets forwarded on down PG1" ) self.pg1.admin_up() self.pg0.add_stream(tx) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.verify_capture_ip6(self.pg1, tx) # # 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") self.vapi.cli("packet mac-filter pg0 off") self.vapi.cli("packet mac-filter pg1 off") self.vapi.cli("packet mac-filter pg2 off") self.vapi.cli("packet mac-filter pg4 off") self.vapi.cli("packet mac-filter pg5 off") self.vapi.cli("packet mac-filter pg6 off") self.vapi.cli("packet mac-filter pg7 off") 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""" MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t # # A (*,G). # one accepting interface, pg0, 1 forwarding interfaces # route_232_1_1_1 = VppIpMRoute( self, "0.0.0.0", "232.1.1.1", 32, MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( self.pg0.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT ), VppMRoutePath( self.pg1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), ], ) route_232_1_1_1.add_vpp_config() route_232_1_1_1.update_entry_flags( MRouteEntryFlags.MFIB_API_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 = VppMFibSignal( 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 = VppIpMRoute( self, "0.0.0.0", "232.1.1.2", 32, MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( self.pg0.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT ), VppMRoutePath( self.pg1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), ], ) route_232_1_1_2.add_vpp_config() route_232_1_1_2.update_entry_flags( MRouteEntryFlags.MFIB_API_ENTRY_FLAG_CONNECTED ) # # Send traffic to both entries. One read should net us two signals # signal_232_1_1_2_itf_0 = VppMFibSignal( 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.update_entry_flags(MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE) route_232_1_1_2.update_entry_flags(MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE) def test_ip_mcast_signal(self): """IP Multicast Signal""" MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t # # A (*,G). # one accepting interface, pg0, 1 forwarding interfaces # route_232_1_1_1 = VppIpMRoute( self, "0.0.0.0", "232.1.1.1", 32, MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( self.pg0.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT ), VppMRoutePath( self.pg1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), ], ) route_232_1_1_1.add_vpp_config() route_232_1_1_1.update_entry_flags(MRouteEntryFlags.MFIB_API_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 = VppMFibSignal( 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_API_ITF_FLAG_ACCEPT | MRouteItfFlags.MFIB_API_ITF_FLAG_NEGATE_SIGNAL ), ) self.vapi.cli("clear trace") 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_API_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_API_ITF_FLAG_ACCEPT ) tx = self._mcast_connected_send_stream("232.1.1.1") signals = self.vapi.mfib_signal_dump() self.assertEqual(0, len(signals)) def test_ip_mcast_vrf(self): """IP Multicast Replication in non-default table""" MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t # # An (S,G). # one accepting interface, pg0, 2 forwarding interfaces # route_1_1_1_1_232_1_1_1 = VppIpMRoute( self, "1.1.1.1", "232.1.1.1", 64, MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( self.pg8.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT ), VppMRoutePath( self.pg1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), VppMRoutePath( self.pg2.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), ], table_id=10, ) route_1_1_1_1_232_1_1_1.add_vpp_config() # # a stream that matches the route for (1.1.1.1,232.1.1.1) # small packets # self.vapi.cli("clear trace") tx = self.create_stream_ip4(self.pg8, "1.1.1.1", "232.1.1.1") self.pg8.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) # # An (S,G). for for-us # route_0_0_0_0_224_0_0_5 = VppIpMRoute( self, "0.0.0.0", "224.0.0.5", 32, MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( self.pg8.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT ), VppMRoutePath( 0xFFFFFFFF, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, type=FibPathType.FIB_PATH_TYPE_LOCAL, ), ], table_id=10, ) route_0_0_0_0_224_0_0_5.add_vpp_config() # # a stream that matches the route for (0.0.0.0, 224.0.0.5) # small packets # self.vapi.cli("clear trace") self.pg8.resolve_arp() # # send a ping to mcast address from peer on pg8 # expect a response # icmp_id = 0xB icmp_seq = 5 icmp_load = b"\x0a" * 18 tx = ( Ether(dst=getmacbyip("224.0.0.5"), src=self.pg8.remote_mac) / IP(src=self.pg8.remote_ip4, dst="224.0.0.5") / ICMP(id=icmp_id, seq=icmp_seq) / Raw(load=icmp_load) ) * 2 self.send_and_expect(self.pg8, tx, self.pg8) def test_ip_mcast_gre(self): """IP Multicast Replication over GRE""" MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t gre_if_1 = VppGreInterface( self, self.pg1.local_ip4, self.pg1.remote_ip4 ).add_vpp_config() gre_if_2 = VppGreInterface( self, self.pg2.local_ip4, self.pg2.remote_ip4 ).add_vpp_config() gre_if_3 = VppGreInterface( self, self.pg3.local_ip4, self.pg3.remote_ip4 ).add_vpp_config() gre_if_1.admin_up() gre_if_1.config_ip4() gre_if_2.admin_up() gre_if_2.config_ip4() gre_if_3.admin_up() gre_if_3.config_ip4() # # An (S,G). # one accepting interface, pg0, 2 forwarding interfaces # route_1_1_1_1_232_1_1_1 = VppIpMRoute( self, "1.1.1.1", "232.2.2.2", 64, MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( gre_if_1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT ), VppMRoutePath( gre_if_2.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), VppMRoutePath( gre_if_3.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), ], ) route_1_1_1_1_232_1_1_1.add_vpp_config() # # a stream that matches the route for (1.1.1.1,232.2.2.2) # small packets # tx = ( Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IP(src=self.pg1.remote_ip4, dst=self.pg1.local_ip4) / GRE() / IP(src="1.1.1.1", dst="232.2.2.2") / UDP(sport=1234, dport=1234) / Raw(b"\a5" * 64) ) * 63 self.vapi.cli("clear trace") self.pg1.add_stream(tx) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # We expect replications on Pg2 & 3 # check the encap headers are as expected based on the egress tunnel rxs = self.pg2.get_capture(len(tx)) for rx in rxs: self.assertEqual(rx[IP].src, gre_if_2.t_src) self.assertEqual(rx[IP].dst, gre_if_2.t_dst) self.assert_packet_checksums_valid(rx) rxs = self.pg3.get_capture(len(tx)) for rx in rxs: self.assertEqual(rx[IP].src, gre_if_3.t_src) self.assertEqual(rx[IP].dst, gre_if_3.t_dst) self.assert_packet_checksums_valid(rx) def test_ip6_mcast_gre(self): """IP6 Multicast Replication over GRE""" MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t gre_if_1 = VppGreInterface( self, self.pg1.local_ip4, self.pg1.remote_ip4 ).add_vpp_config() gre_if_2 = VppGreInterface( self, self.pg2.local_ip4, self.pg2.remote_ip4 ).add_vpp_config() gre_if_3 = VppGreInterface( self, self.pg3.local_ip4, self.pg3.remote_ip4 ).add_vpp_config() gre_if_1.admin_up() gre_if_1.config_ip6() gre_if_2.admin_up() gre_if_2.config_ip6() gre_if_3.admin_up() gre_if_3.config_ip6() # # An (S,G). # one accepting interface, pg0, 2 forwarding interfaces # route_1_1_FF_1 = VppIpMRoute( self, "1::1", "FF00::1", 256, MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( gre_if_1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT ), VppMRoutePath( gre_if_2.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), VppMRoutePath( gre_if_3.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD ), ], ) route_1_1_FF_1.add_vpp_config() # # a stream that matches the route for (1::1, FF::1) # small packets # tx = ( Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IP(src=self.pg1.remote_ip4, dst=self.pg1.local_ip4) / GRE() / IPv6(src="1::1", dst="FF00::1") / UDP(sport=1234, dport=1234) / Raw(b"\a5" * 64) ) * 63 self.vapi.cli("clear trace") self.pg1.add_stream(tx) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # We expect replications on Pg2 & 3 # check the encap headers are as expected based on the egress tunnel rxs = self.pg2.get_capture(len(tx)) for rx in rxs: self.assertEqual(rx[IP].src, gre_if_2.t_src) self.assertEqual(rx[IP].dst, gre_if_2.t_dst) self.assert_packet_checksums_valid(rx) rxs = self.pg3.get_capture(len(tx)) for rx in rxs: self.assertEqual(rx[IP].src, gre_if_3.t_src) self.assertEqual(rx[IP].dst, gre_if_3.t_dst) self.assert_packet_checksums_valid(rx) def test_ip6_mcast_vrf(self): """IPv6 Multicast Replication in non-default table""" MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t # # An (S,G). # one accepting interface, pg0, 2 forwarding interfaces # route_2001_ff01_1 = VppIpMRoute( self, "2001::1", "ff01::1", 256, MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( self.pg8.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6, ), VppMRoutePath( self.pg1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6, ), VppMRoutePath( self.pg2.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6, ), ], table_id=10, ) route_2001_ff01_1.add_vpp_config() # # a stream that matches the route for (2001::1, ff00::1) # self.vapi.cli("clear trace") tx = self.create_stream_ip6(self.pg8, "2001::1", "ff01::1") self.pg8.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) def test_bidir(self): """IP Multicast Bi-directional""" MRouteItfFlags = VppEnum.vl_api_mfib_itf_flags_t MRouteEntryFlags = VppEnum.vl_api_mfib_entry_flags_t # # A (*,G). The set of accepting interfaces matching the forwarding # route_232_1_1_1 = VppIpMRoute( self, "0.0.0.0", "232.1.1.1", 32, MRouteEntryFlags.MFIB_API_ENTRY_FLAG_NONE, [ VppMRoutePath( self.pg0.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT | MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, ), VppMRoutePath( self.pg1.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT | MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, ), VppMRoutePath( self.pg2.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT | MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, ), VppMRoutePath( self.pg3.sw_if_index, MRouteItfFlags.MFIB_API_ITF_FLAG_ACCEPT | MRouteItfFlags.MFIB_API_ITF_FLAG_FORWARD, ), ], ) route_232_1_1_1.add_vpp_config() 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, 3, but not on pg0 self.verify_capture_ip4(self.pg1, tx) self.verify_capture_ip4(self.pg2, tx) self.verify_capture_ip4(self.pg3, tx) self.pg0.assert_nothing_captured(remark="IP multicast packets forwarded on PG0") if __name__ == "__main__": unittest.main(testRunner=VppTestRunner)