vpp - Vector Packet Processing

Age	Commit message (Expand)	Author	Files	Lines
2019-03-28	Typos. A bunch of typos I've been collecting.	Paul Vinciguerra	1	-11/+11
2019-03-11	vpp_papi_provider: Remove more wrapper functions.	Ole Troan	1	-10/+8
2019-03-11	VPP-1508: Use scapy.compat to manage packet level library differences.	Paul Vinciguerra	1	-1/+2
2018-12-20	FIB: encode the label stack in the FIB path during table dump	Neale Ranns	1	-1/+7
2018-09-27	IPIP and IPv6 fragmentation	Ole Troan	1	-1/+1
2018-09-26	MPLS tunnel dump: use sw_if_index not tunnel_index	Neale Ranns	1	-0/+13
2018-09-20	Route counters in the stats segment	Neale Ranns	1	-0/+21
2018-09-11	GBP Endpoint Updates	Neale Ranns	1	-1/+2
2018-03-09	MPLS Unifom mode	Neale Ranns	1	-368/+473
2018-01-09	test: consolidate the multiple versions of send_and_*	Neale Ranns	1	-16/+7
2017-11-11	MPLS disposition actions at the tail of unicast LSPs	Neale Ranns	1	-2/+112
2017-10-31	Refactor IP input checks for re-use at MPLS disposition	Neale Ranns	1	-2/+21
2017-09-11	FIB table add/delete API	Neale Ranns	1	-6/+42
2017-08-08	L2 over MPLS	Neale Ranns	1	-56/+262
2017-05-26	MPLS lookup DPO does not pop the label (nor does it handle replicate)	Neale Ranns	1	-0/+20
2017-05-24	Missing VLIB node for IPv6 disposition from mcast MPLS LSP	Neale Ranns	1	-4/+73
2017-05-23	Labelled attached paths via an MPLS tunnel	Neale Ranns	1	-2/+25
2017-04-24	Improve Load-Balance MAPs	Neale Ranns	1	-0/+359
2017-04-07	MPLS Mcast	Neale Ranns	1	-22/+255
2017-03-17	Fix IP feature ordering.	Neale Ranns	1	-0/+83
2017-03-03	Changing the IP table for an interface is an error if the interface already h...	Neale Ranns	1	-4/+5
2017-02-20	Python test IP and MPLS objects conform to infra.	Neale Ranns	1	-75/+66
2016-12-23	make test: improve handling of packet captures	Klement Sekera	1	-17/+24
2016-12-16	make test: improve robustness and performance	Klement Sekera	1	-23/+6
2016-12-14	Ping response in a VRF context uses correct FIB for response	Neale Ranns	1	-10/+73
2016-12-13	make test: Use VXLAN built in scapy 2.3.3	Matej Klotton	1	-28/+33
2016-12-06	add missing import to mpls test	Gabriel Ganne	1	-0/+1
2016-12-05	make test: fix missing log/packet messages	Klement Sekera	1	-6/+6
2016-12-02	MPLS infrastructure improvments	Neale Ranns	1	-20/+502
2016-11-01	MPLS Exp-null Tests	Neale Ranns	1	-0/+209

#!/usr/bin/env python import unittest import scapy.compat from scapy.packet import Raw from scapy.layers.l2 import Ether, Dot1Q, GRE from scapy.layers.inet import IP, UDP from scapy.layers.inet6 import IPv6 from scapy.volatile import RandMAC, RandIP from framework import VppTestCase, VppTestRunner from vpp_sub_interface import L2_VTR_OP, VppDot1QSubint from vpp_gre_interface import VppGreInterface, VppGre6Interface from vpp_ip import DpoProto from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpTable from util import ppp, ppc class GreTunnelTypes: TT_L3 = 0 TT_TEB = 1 TT_ERSPAN = 2 class TestGRE(VppTestCase): """ GRE Test Case """ @classmethod def setUpClass(cls): super(TestGRE, cls).setUpClass() def setUp(self): super(TestGRE, self).setUp() # create 3 pg interfaces - set one in a non-default table. self.create_pg_interfaces(range(3)) self.tbl = VppIpTable(self, 1) self.tbl.add_vpp_config() self.pg1.set_table_ip4(1) for i in self.pg_interfaces: i.admin_up() self.pg0.config_ip4() self.pg0.resolve_arp() self.pg1.config_ip4() self.pg1.resolve_arp() self.pg2.config_ip6() self.pg2.resolve_ndp() def tearDown(self): for i in self.pg_interfaces: i.unconfig_ip4() i.unconfig_ip6() i.admin_down() self.pg1.set_table_ip4(0) super(TestGRE, self).tearDown() def create_stream_ip4(self, src_if, src_ip, dst_ip): pkts = [] for i in range(0, 257): 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, 257): 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 create_tunnel_stream_4o4(self, src_if, tunnel_src, tunnel_dst, src_ip, dst_ip): pkts = [] for i in range(0, 257): 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=tunnel_src, dst=tunnel_dst) / GRE() / 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_tunnel_stream_6o4(self, src_if, tunnel_src, tunnel_dst, src_ip, dst_ip): pkts = [] for i in range(0, 257): 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=tunnel_src, dst=tunnel_dst) / GRE() / IPv6(src=src_ip, dst=dst_ip) / UDP(sport=1234, dport=1234) / Raw(payload)) info.data = p.copy() pkts.append(p) return pkts def create_tunnel_stream_6o6(self, src_if, tunnel_src, tunnel_dst, src_ip, dst_ip): pkts = [] for i in range(0, 257): 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=tunnel_src, dst=tunnel_dst) / GRE() / IPv6(src=src_ip, dst=dst_ip) / UDP(sport=1234, dport=1234) / Raw(payload)) info.data = p.copy() pkts.append(p) return pkts def create_tunnel_stream_l2o4(self, src_if, tunnel_src, tunnel_dst): pkts = [] for i in range(0, 257): 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=tunnel_src, dst=tunnel_dst) / GRE() / Ether(dst=RandMAC('*:*:*:*:*:*'), src=RandMAC('*:*:*:*:*:*')) / IP(src=scapy.compat.raw(RandIP()), dst=scapy.compat.raw(RandIP())) / UDP(sport=1234, dport=1234) / Raw(payload)) info.data = p.copy() pkts.append(p) return pkts def create_tunnel_stream_vlano4(self, src_if, tunnel_src, tunnel_dst, vlan): pkts = [] for i in range(0, 257): 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=tunnel_src, dst=tunnel_dst) / GRE() / Ether(dst=RandMAC('*:*:*:*:*:*'), src=RandMAC('*:*:*:*:*:*')) / Dot1Q(vlan=vlan) / IP(src=scapy.compat.raw(RandIP()), dst=scapy.compat.raw(RandIP())) / UDP(sport=1234, dport=1234) / Raw(payload)) info.data = p.copy() pkts.append(p) return pkts def verify_tunneled_4o4(self, src_if, capture, sent, tunnel_src, tunnel_dst): self.assertEqual(len(capture), len(sent)) for i in range(len(capture)): try: tx = sent[i] rx = capture[i] tx_ip = tx[IP] rx_ip = rx[IP] self.assertEqual(rx_ip.src, tunnel_src) self.assertEqual(rx_ip.dst, tunnel_dst) rx_gre = rx[GRE] rx_ip = rx_gre[IP] 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: self.logger.error(ppp("Rx:", rx)) self.logger.error(ppp("Tx:", tx)) raise def verify_tunneled_6o6(self, src_if, capture, sent, tunnel_src, tunnel_dst): self.assertEqual(len(capture), len(sent)) for i in range(len(capture)): try: tx = sent[i] rx = capture[i] tx_ip = tx[IPv6] rx_ip = rx[IPv6] self.assertEqual(rx_ip.src, tunnel_src) self.assertEqual(rx_ip.dst, tunnel_dst) rx_gre = GRE(scapy.compat.raw(rx_ip[IPv6].payload)) rx_ip = rx_gre[IPv6] self.assertEqual(rx_ip.src, tx_ip.src) self.assertEqual(rx_ip.dst, tx_ip.dst) except: self.logger.error(ppp("Rx:", rx)) self.logger.error(ppp("Tx:", tx)) raise def verify_tunneled_4o6(self, src_if, capture, sent, tunnel_src, tunnel_dst): self.assertEqual(len(capture), len(sent)) for i in range(len(capture)): try: tx = sent[i] rx = capture[i] rx_ip = rx[IPv6] self.assertEqual(rx_ip.src, tunnel_src) self.assertEqual(rx_ip.dst, tunnel_dst) rx_gre = GRE(scapy.compat.raw(rx_ip[IPv6].payload)) tx_ip = tx[IP] rx_ip = rx_gre[IP] self.assertEqual(rx_ip.src, tx_ip.src) self.assertEqual(rx_ip.dst, tx_ip.dst) except: self.logger.error(ppp("Rx:", rx)) self.logger.error(ppp("Tx:", tx)) raise def verify_tunneled_6o4(self, src_if, capture, sent, tunnel_src, tunnel_dst): self.assertEqual(len(capture), len(sent)) for i in range(len(capture)): try: tx = sent[i] rx = capture[i] rx_ip = rx[IP] self.assertEqual(rx_ip.src, tunnel_src) self.assertEqual(rx_ip.dst, tunnel_dst) rx_gre = GRE(scapy.compat.raw(rx_ip[IP].payload)) rx_ip = rx_gre[IPv6] tx_ip = tx[IPv6] self.assertEqual(rx_ip.src, tx_ip.src) self.assertEqual(rx_ip.dst, tx_ip.dst) except: self.logger.error(ppp("Rx:", rx)) self.logger.error(ppp("Tx:", tx)) raise def verify_tunneled_l2o4(self, src_if, capture, sent, tunnel_src, tunnel_dst): self.assertEqual(len(capture), len(sent)) for i in range(len(capture)): try: tx = sent[i] rx = capture[i] tx_ip = tx[IP] rx_ip = rx[IP] self.assertEqual(rx_ip.src, tunnel_src) self.assertEqual(rx_ip.dst, tunnel_dst) rx_gre = rx[GRE] rx_l2 = rx_gre[Ether] rx_ip = rx_l2[IP] tx_gre = tx[GRE] tx_l2 = tx_gre[Ether] tx_ip = tx_l2[IP] self.assertEqual(rx_ip.src, tx_ip.src) self.assertEqual(rx_ip.dst, tx_ip.dst) # bridged, not L3 forwarded, so no TTL decrement self.assertEqual(rx_ip.ttl, tx_ip.ttl) except: self.logger.error(ppp("Rx:", rx)) self.logger.error(ppp("Tx:", tx)) raise def verify_tunneled_vlano4(self, src_if, capture, sent, tunnel_src, tunnel_dst, vlan): try: self.assertEqual(len(capture), len(sent)) except: ppc("Unexpected packets captured:", capture) raise for i in range(len(capture)): try: tx = sent[i] rx = capture[i] tx_ip = tx[IP] rx_ip = rx[IP] self.assertEqual(rx_ip.src, tunnel_src) self.assertEqual(rx_ip.dst, tunnel_dst) rx_gre = rx[GRE] rx_l2 = rx_gre[Ether] rx_vlan = rx_l2[Dot1Q] rx_ip = rx_l2[IP] self.assertEqual(rx_vlan.vlan, vlan) tx_gre = tx[GRE] tx_l2 = tx_gre[Ether] tx_ip = tx_l2[IP] self.assertEqual(rx_ip.src, tx_ip.src) self.assertEqual(rx_ip.dst, tx_ip.dst) # bridged, not L3 forwarded, so no TTL decrement self.assertEqual(rx_ip.ttl, tx_ip.ttl) except: self.logger.error(ppp("Rx:", rx)) self.logger.error(ppp("Tx:", tx)) raise def verify_decapped_4o4(self, src_if, capture, sent): self.assertEqual(len(capture), len(sent)) for i in range(len(capture)): try: tx = sent[i] rx = capture[i] tx_ip = tx[IP] rx_ip = rx[IP] tx_gre = tx[GRE] tx_ip = tx_gre[IP] 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: self.logger.error(ppp("Rx:", rx)) self.logger.error(ppp("Tx:", tx)) raise def verify_decapped_6o4(self, src_if, capture, sent): self.assertEqual(len(capture), len(sent)) for i in range(len(capture)): try: tx = sent[i] rx = capture[i] tx_ip = tx[IP] rx_ip = rx[IPv6] tx_gre = tx[GRE] tx_ip = tx_gre[IPv6] self.assertEqual(rx_ip.src, tx_ip.src) self.assertEqual(rx_ip.dst, tx_ip.dst) self.assertEqual(rx_ip.hlim + 1, tx_ip.hlim) except: self.logger.error(ppp("Rx:", rx)) self.logger.error(ppp("Tx:", tx)) raise def test_gre(self): """ GRE IPv4 tunnel Tests """ # # Create an L3 GRE tunnel. # - set it admin up # - assign an IP Addres # - Add a route via the tunnel # gre_if = VppGreInterface(self, self.pg0.local_ip4, "1.1.1.2") gre_if.add_vpp_config() # # The double create (create the same tunnel twice) should fail, # and we should still be able to use the original # try: gre_if.add_vpp_config() except Exception: pass else: self.fail("Double GRE tunnel add does not fail") gre_if.admin_up() gre_if.config_ip4() route_via_tun = VppIpRoute(self, "4.4.4.4", 32, [VppRoutePath("0.0.0.0", gre_if.sw_if_index)]) route_via_tun.add_vpp_config() # # Send a packet stream that is routed into the tunnel # - they are all dropped since the tunnel's destintation IP # is unresolved - or resolves via the default route - which # which is a drop. # tx = self.create_stream_ip4(self.pg0, "5.5.5.5", "4.4.4.4") self.send_and_assert_no_replies(self.pg0, tx) # # Add a route that resolves the tunnel's destination # route_tun_dst = VppIpRoute(self, "1.1.1.2", 32, [VppRoutePath(self.pg0.remote_ip4, self.pg0.sw_if_index)]) route_tun_dst.add_vpp_config() # # Send a packet stream that is routed into the tunnel # - packets are GRE encapped # tx = self.create_stream_ip4(self.pg0, "5.5.5.5", "4.4.4.4") rx = self.send_and_expect(self.pg0, tx, self.pg0) self.verify_tunneled_4o4(self.pg0, rx, tx, self.pg0.local_ip4, "1.1.1.2") # # Send tunneled packets that match the created tunnel and # are decapped and forwarded # tx = self.create_tunnel_stream_4o4(self.pg0, "1.1.1.2", self.pg0.local_ip4, self.pg0.local_ip4, self.pg0.remote_ip4) rx = self.send_and_expect(self.pg0, tx, self.pg0) self.verify_decapped_4o4(self.pg0, rx, tx) # # Send tunneled packets that do not match the tunnel's src # self.vapi.cli("clear trace") tx = self.create_tunnel_stream_4o4(self.pg0, "1.1.1.3", self.pg0.local_ip4, self.pg0.local_ip4, self.pg0.remote_ip4) self.send_and_assert_no_replies( self.pg0, tx, remark="GRE packets forwarded despite no SRC address match") # # Configure IPv6 on the PG interface so we can route IPv6 # packets # self.pg0.config_ip6() self.pg0.resolve_ndp() # # Send IPv6 tunnel encapslated packets # - dropped since IPv6 is not enabled on the tunnel # tx = self.create_tunnel_stream_6o4(self.pg0, "1.1.1.2", self.pg0.local_ip4, self.pg0.local_ip6, self.pg0.remote_ip6) self.send_and_assert_no_replies(self.pg0, tx, "IPv6 GRE packets forwarded " "despite IPv6 not enabled on tunnel") # # Enable IPv6 on the tunnel # gre_if.config_ip6() # # Send IPv6 tunnel encapslated packets # - forwarded since IPv6 is enabled on the tunnel # tx = self.create_tunnel_stream_6o4(self.pg0, "1.1.1.2", self.pg0.local_ip4, self.pg0.local_ip6, self.pg0.remote_ip6) rx = self.send_and_expect(self.pg0, tx, self.pg0) self.verify_decapped_6o4(self.pg0, rx, tx) # # Send v6 packets for v4 encap # route6_via_tun = VppIpRoute( self, "2001::1", 128, [VppRoutePath("::", gre_if.sw_if_index, proto=DpoProto.DPO_PROTO_IP6)], is_ip6=1) route6_via_tun.add_vpp_config() tx = self.create_stream_ip6(self.pg0, "2001::2", "2001::1") rx = self.send_and_expect(self.pg0, tx, self.pg0) self.verify_tunneled_6o4(self.pg0, rx, tx, self.pg0.local_ip4, "1.1.1.2") # # test case cleanup # route_tun_dst.remove_vpp_config() route_via_tun.remove_vpp_config() route6_via_tun.remove_vpp_config() gre_if.remove_vpp_config() self.pg0.unconfig_ip6() def test_gre6(self): """ GRE IPv6 tunnel Tests """ self.pg1.config_ip6() self.pg1.resolve_ndp() # # Create an L3 GRE tunnel. # - set it admin up # - assign an IP Address # - Add a route via the tunnel # gre_if = VppGre6Interface(self, self.pg2.local_ip6, "1002::1") gre_if.add_vpp_config() gre_if.admin_up() gre_if.config_ip6() route_via_tun = VppIpRoute( self, "4004::1", 128, [VppRoutePath("0::0", gre_if.sw_if_index, proto=DpoProto.DPO_PROTO_IP6)], is_ip6=1) route_via_tun.add_vpp_config() # # Send a packet stream that is routed into the tunnel # - they are all dropped since the tunnel's destintation IP # is unresolved - or resolves via the default route - which # which is a drop. # tx = self.create_stream_ip6(self.pg2, "5005::1", "4004::1") self.send_and_assert_no_replies( self.pg2, tx, "GRE packets forwarded without DIP resolved") # # Add a route that resolves the tunnel's destination # route_tun_dst = VppIpRoute( self, "1002::1", 128, [VppRoutePath(self.pg2.remote_ip6, self.pg2.sw_if_index, proto=DpoProto.DPO_PROTO_IP6)], is_ip6=1) route_tun_dst.add_vpp_config() # # Send a packet stream that is routed into the tunnel # - packets are GRE encapped # tx = self.create_stream_ip6(self.pg2, "5005::1", "4004::1") rx = self.send_and_expect(self.pg2, tx, self.pg2) self.verify_tunneled_6o6(self.pg2, rx, tx, self.pg2.local_ip6, "1002::1") # # Test decap. decapped packets go out pg1 # tx = self.create_tunnel_stream_6o6(self.pg2, "1002::1", self.pg2.local_ip6, "2001::1", self.pg1.remote_ip6) rx = self.send_and_expect(self.pg2, tx, self.pg1) # # RX'd packet is UDP over IPv6, test the GRE header is gone. # self.assertFalse(rx[0].haslayer(GRE)) self.assertEqual(rx[0][IPv6].dst, self.pg1.remote_ip6) # # Send v4 over v6 # route4_via_tun = VppIpRoute(self, "1.1.1.1", 32, [VppRoutePath("0.0.0.0", gre_if.sw_if_index)]) route4_via_tun.add_vpp_config() tx = self.create_stream_ip4(self.pg0, "1.1.1.2", "1.1.1.1") rx = self.send_and_expect(self.pg0, tx, self.pg2) self.verify_tunneled_4o6(self.pg0, rx, tx, self.pg2.local_ip6, "1002::1") # # test case cleanup # route_tun_dst.remove_vpp_config() route_via_tun.remove_vpp_config() route4_via_tun.remove_vpp_config() gre_if.remove_vpp_config() self.pg2.unconfig_ip6() self.pg1.unconfig_ip6() def test_gre_vrf(self): """ GRE tunnel VRF Tests """ # # Create an L3 GRE tunnel whose destination is in the non-default # table. The underlay is thus non-default - the overlay is still # the default. # - set it admin up # - assign an IP Addres # gre_if = VppGreInterface(self, self.pg1.local_ip4, "2.2.2.2", outer_fib_id=1) gre_if.add_vpp_config() gre_if.admin_up() gre_if.config_ip4() # # Add a route via the tunnel - in the overlay # route_via_tun = VppIpRoute(self, "9.9.9.9", 32, [VppRoutePath("0.0.0.0", gre_if.sw_if_index)]) route_via_tun.add_vpp_config() # # Add a route that resolves the tunnel's destination - in the # underlay table # route_tun_dst = VppIpRoute(self, "2.2.2.2", 32, table_id=1, paths=[VppRoutePath(self.pg1.remote_ip4, self.pg1.sw_if_index)]) route_tun_dst.add_vpp_config() # # Send a packet stream that is routed into the tunnel # packets are sent in on pg0 which is in the default table # - packets are GRE encapped # self.vapi.cli("clear trace") tx = self.create_stream_ip4(self.pg0, "5.5.5.5", "9.9.9.9") rx = self.send_and_expect(self.pg0, tx, self.pg1) self.verify_tunneled_4o4(self.pg1, rx, tx, self.pg1.local_ip4, "2.2.2.2") # # Send tunneled packets that match the created tunnel and # are decapped and forwarded. This tests the decap lookup # does not happen in the encap table # self.vapi.cli("clear trace") tx = self.create_tunnel_stream_4o4(self.pg1, "2.2.2.2", self.pg1.local_ip4, self.pg0.local_ip4, self.pg0.remote_ip4) rx = self.send_and_expect(self.pg1, tx, self.pg0) self.verify_decapped_4o4(self.pg0, rx, tx) # # Send tunneled packets that match the created tunnel # but arrive on an interface that is not in the tunnel's # encap VRF, these are dropped. # IP enable the interface so they aren't dropped due to # IP not being enabled. # self.pg2.config_ip4() self.vapi.cli("clear trace") tx = self.create_tunnel_stream_4o4(self.pg2, "2.2.2.2", self.pg1.local_ip4, self.pg0.local_ip4, self.pg0.remote_ip4) rx = self.send_and_assert_no_replies( self.pg2, tx, "GRE decap packets in wrong VRF") self.pg2.unconfig_ip4() # # test case cleanup # route_tun_dst.remove_vpp_config() route_via_tun.remove_vpp_config() gre_if.remove_vpp_config() def test_gre_l2(self): """ GRE tunnel L2 Tests """ # # Add routes to resolve the tunnel destinations # route_tun1_dst = VppIpRoute(self, "2.2.2.2", 32, [VppRoutePath(self.pg0.remote_ip4, self.pg0.sw_if_index)]) route_tun2_dst = VppIpRoute(self, "2.2.2.3", 32, [VppRoutePath(self.pg0.remote_ip4, self.pg0.sw_if_index)]) route_tun1_dst.add_vpp_config() route_tun2_dst.add_vpp_config() # # Create 2 L2 GRE tunnels and x-connect them # gre_if1 = VppGreInterface(self, self.pg0.local_ip4, "2.2.2.2", type=GreTunnelTypes.TT_TEB) gre_if2 = VppGreInterface(self, self.pg0.local_ip4, "2.2.2.3", type=GreTunnelTypes.TT_TEB) gre_if1.add_vpp_config() gre_if2.add_vpp_config() gre_if1.admin_up() gre_if2.admin_up() self.vapi.sw_interface_set_l2_xconnect(gre_if1.sw_if_index, gre_if2.sw_if_index, enable=1) self.vapi.sw_interface_set_l2_xconnect(gre_if2.sw_if_index, gre_if1.sw_if_index, enable=1) # # Send in tunnel encapped L2. expect out tunnel encapped L2 # in both directions # tx = self.create_tunnel_stream_l2o4(self.pg0, "2.2.2.2", self.pg0.local_ip4) rx = self.send_and_expect(self.pg0, tx, self.pg0) self.verify_tunneled_l2o4(self.pg0, rx, tx, self.pg0.local_ip4, "2.2.2.3") tx = self.create_tunnel_stream_l2o4(self.pg0, "2.2.2.3", self.pg0.local_ip4) rx = self.send_and_expect(self.pg0, tx, self.pg0) self.verify_tunneled_l2o4(self.pg0, rx, tx, self.pg0.local_ip4, "2.2.2.2") self.vapi.sw_interface_set_l2_xconnect(gre_if1.sw_if_index, gre_if2.sw_if_index, enable=0) self.vapi.sw_interface_set_l2_xconnect(gre_if2.sw_if_index, gre_if1.sw_if_index, enable=0) # # Create a VLAN sub-interfaces on the GRE TEB interfaces # then x-connect them # gre_if_11 = VppDot1QSubint(self, gre_if1, 11) gre_if_12 = VppDot1QSubint(self, gre_if2, 12) # gre_if_11.add_vpp_config() # gre_if_12.add_vpp_config() gre_if_11.admin_up() gre_if_12.admin_up() self.vapi.sw_interface_set_l2_xconnect(gre_if_11.sw_if_index, gre_if_12.sw_if_index, enable=1) self.vapi.sw_interface_set_l2_xconnect(gre_if_12.sw_if_index, gre_if_11.sw_if_index, enable=1) # # Configure both to pop thier respective VLAN tags, # so that during the x-coonect they will subsequently push # self.vapi.l2_interface_vlan_tag_rewrite( sw_if_index=gre_if_12.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1, push_dot1q=12) self.vapi.l2_interface_vlan_tag_rewrite( sw_if_index=gre_if_11.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1, push_dot1q=11) # # Send traffic in both directiond - expect the VLAN tags to # be swapped. # tx = self.create_tunnel_stream_vlano4(self.pg0, "2.2.2.2", self.pg0.local_ip4, 11) rx = self.send_and_expect(self.pg0, tx, self.pg0) self.verify_tunneled_vlano4(self.pg0, rx, tx, self.pg0.local_ip4, "2.2.2.3", 12) tx = self.create_tunnel_stream_vlano4(self.pg0, "2.2.2.3", self.pg0.local_ip4, 12) rx = self.send_and_expect(self.pg0, tx, self.pg0) self.verify_tunneled_vlano4(self.pg0, rx, tx, self.pg0.local_ip4, "2.2.2.2", 11) # # Cleanup Test resources # gre_if_11.remove_vpp_config() gre_if_12.remove_vpp_config() gre_if1.remove_vpp_config() gre_if2.remove_vpp_config() route_tun1_dst.add_vpp_config() route_tun2_dst.add_vpp_config() def test_gre_loop(self): """ GRE tunnel loop Tests """ # # Create an L3 GRE tunnel. # - set it admin up # - assign an IP Addres # gre_if = VppGreInterface(self, self.pg0.local_ip4, "1.1.1.2") gre_if.add_vpp_config() gre_if.admin_up() gre_if.config_ip4() # # add a route to the tunnel's destination that points # through the tunnel, hence forming a loop in the forwarding # graph # route_dst = VppIpRoute(self, "1.1.1.2", 32, [VppRoutePath("0.0.0.0", gre_if.sw_if_index)]) route_dst.add_vpp_config() # # packets to the tunnels destination should be dropped # tx = self.create_stream_ip4(self.pg0, "1.1.1.1", "1.1.1.2") self.send_and_assert_no_replies(self.pg2, tx) self.logger.info(self.vapi.ppcli("sh adj 7")) # # break the loop # route_dst.modify([VppRoutePath(self.pg1.remote_ip4, self.pg1.sw_if_index)]) route_dst.add_vpp_config() rx = self.send_and_expect(self.pg0, tx, self.pg1) # # a good route throught the tunnel to check it restacked # route_via_tun_2 = VppIpRoute(self, "2.2.2.2", 32, [VppRoutePath("0.0.0.0", gre_if.sw_if_index)]) route_via_tun_2.add_vpp_config() tx = self.create_stream_ip4(self.pg0, "2.2.2.3", "2.2.2.2") rx = self.send_and_expect(self.pg0, tx, self.pg1) self.verify_tunneled_4o4(self.pg1, rx, tx, self.pg0.local_ip4, "1.1.1.2") # # cleanup # route_via_tun_2.remove_vpp_config() gre_if.remove_vpp_config() if __name__ == '__main__': unittest.main(testRunner=VppTestRunner)