#!/usr/bin/env python3 import unittest from framework import VppTestCase, VppTestRunner from vpp_udp_encap import find_udp_encap, VppUdpEncap from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpTable, VppMplsLabel, \ FibPathType from scapy.packet import Raw from scapy.layers.l2 import Ether from scapy.layers.inet import IP, UDP from scapy.layers.inet6 import IPv6 from scapy.contrib.mpls import MPLS NUM_PKTS = 67 class TestUdpEncap(VppTestCase): """ UDP Encap Test Case """ @classmethod def setUpClass(cls): super(TestUdpEncap, cls).setUpClass() @classmethod def tearDownClass(cls): super(TestUdpEncap, cls).tearDownClass() def setUp(self): super(TestUdpEncap, self).setUp() # create 2 pg interfaces self.create_pg_interfaces(range(4)) # setup interfaces # assign them different tables. table_id = 0 self.tables = [] for i in self.pg_interfaces: i.admin_up() if table_id != 0: tbl = VppIpTable(self, table_id) tbl.add_vpp_config() self.tables.append(tbl) tbl = VppIpTable(self, table_id, is_ip6=1) tbl.add_vpp_config() self.tables.append(tbl) i.set_table_ip4(table_id) i.set_table_ip6(table_id) i.config_ip4() i.resolve_arp() i.config_ip6() i.resolve_ndp() table_id += 1 def tearDown(self): for i in self.pg_interfaces: i.unconfig_ip4() i.unconfig_ip6() i.set_table_ip4(0) i.set_table_ip6(0) i.admin_down() super(TestUdpEncap, self).tearDown() def validate_outer4(self, rx, encap_obj): self.assertEqual(rx[IP].src, encap_obj.src_ip_s) self.assertEqual(rx[IP].dst, encap_obj.dst_ip_s) self.assertEqual(rx[UDP].sport, encap_obj.src_port) self.assertEqual(rx[UDP].dport, encap_obj.dst_port) def validate_outer6(self, rx, encap_obj): self.assertEqual(rx[IPv6].src, encap_obj.src_ip_s) self.assertEqual(rx[IPv6].dst, encap_obj.dst_ip_s) self.assertEqual(rx[UDP].sport, encap_obj.src_port) self.assertEqual(rx[UDP].dport, encap_obj.dst_port) def validate_inner4(self, rx, tx, ttl=None): self.assertEqual(rx[IP].src, tx[IP].src) self.assertEqual(rx[IP].dst, tx[IP].dst) if ttl: self.assertEqual(rx[IP].ttl, ttl) else: self.assertEqual(rx[IP].ttl, tx[IP].ttl) def validate_inner6(self, rx, tx): self.assertEqual(rx.src, tx[IPv6].src) self.assertEqual(rx.dst, tx[IPv6].dst) self.assertEqual(rx.hlim, tx[IPv6].hlim) def test_udp_encap(self): """ UDP Encap test """ # # construct a UDP encap object through each of the peers # v4 through the first two peers, v6 through the second. # udp_encap_0 = VppUdpEncap(self, self.pg0.local_ip4, self.pg0.remote_ip4, 330, 440) udp_encap_1 = VppUdpEncap(self, self.pg1.local_ip4, self.pg1.remote_ip4, 331, 441, table_id=1) udp_encap_2 = VppUdpEncap(self, self.pg2.local_ip6, self.pg2.remote_ip6, 332, 442, table_id=2) udp_encap_3 = VppUdpEncap(self, self.pg3.local_ip6, self.pg3.remote_ip6, 333, 443, table_id=3) udp_encap_0.add_vpp_config() udp_encap_1.add_vpp_config() udp_encap_2.add_vpp_config() udp_encap_3.add_vpp_config() self.logger.info(self.vapi.cli("sh udp encap")) self.assertTrue(find_udp_encap(self, udp_encap_2)) self.assertTrue(find_udp_encap(self, udp_encap_3)) self.assertTrue(find_udp_encap(self, udp_encap_0)) self.assertTrue(find_udp_encap(self, udp_encap_1)) # # Routes via each UDP encap object - all combinations of v4 and v6. # route_4o4 = VppIpRoute( self, "1.1.0.1", 32, [VppRoutePath("0.0.0.0", 0xFFFFFFFF, type=FibPathType.FIB_PATH_TYPE_UDP_ENCAP, next_hop_id=udp_encap_0.id)]) route_4o6 = VppIpRoute( self, "1.1.2.1", 32, [VppRoutePath("0.0.0.0", 0xFFFFFFFF, type=FibPathType.FIB_PATH_TYPE_UDP_ENCAP, next_hop_id=udp_encap_2.id)]) route_6o4 = VppIpRoute( self, "2001::1", 128, [VppRoutePath("0.0.0.0", 0xFFFFFFFF, type=FibPathType.FIB_PATH_TYPE_UDP_ENCAP, next_hop_id=udp_encap_1.id)]) route_6o6 = VppIpRoute( self, "2001::3", 128, [VppRoutePath("0.0.0.0", 0xFFFFFFFF, type=FibPathType.FIB_PATH_TYPE_UDP_ENCAP, next_hop_id=udp_encap_3.id)]) route_4o6.add_vpp_config() route_6o6.add_vpp_config() route_6o4.add_vpp_config() route_4o4.add_vpp_config() # # 4o4 encap # p_4o4 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src="2.2.2.2", dst="1.1.0.1") / UDP(sport=1234, dport=1234) / Raw(b'\xa5' * 100)) rx = self.send_and_expect(self.pg0, p_4o4*NUM_PKTS, self.pg0) for p in rx: self.validate_outer4(p, udp_encap_0) p = IP(p["UDP"].payload.load) self.validate_inner4(p, p_4o4) self.assertEqual(udp_encap_0.get_stats()['packets'], NUM_PKTS) # # 4o6 encap # p_4o6 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src="2.2.2.2", dst="1.1.2.1") / UDP(sport=1234, dport=1234) / Raw(b'\xa5' * 100)) rx = self.send_and_expect(self.pg0, p_4o6*NUM_PKTS, self.pg2) for p in rx: self.validate_outer6(p, udp_encap_2) p = IP(p["UDP"].payload.load) self.validate_inner4(p, p_4o6) self.assertEqual(udp_encap_2.get_stats()['packets'], NUM_PKTS) # # 6o4 encap # p_6o4 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IPv6(src="2001::100", dst="2001::1") / UDP(sport=1234, dport=1234) / Raw(b'\xa5' * 100)) rx = self.send_and_expect(self.pg0, p_6o4*NUM_PKTS, self.pg1) for p in rx: self.validate_outer4(p, udp_encap_1) p = IPv6(p["UDP"].payload.load) self.validate_inner6(p, p_6o4) self.assertEqual(udp_encap_1.get_stats()['packets'], NUM_PKTS) # # 6o6 encap # p_6o6 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IPv6(src="2001::100", dst="2001::3") / UDP(sport=1234, dport=1234) / Raw(b'\xa5' * 100)) rx = self.send_and_expect(self.pg0, p_6o6*NUM_PKTS, self.pg3) for p in rx: self.validate_outer6(p, udp_encap_3) p = IPv6(p["UDP"].payload.load) self.validate_inner6(p, p_6o6) self.assertEqual(udp_encap_3.get_stats()['packets'], NUM_PKTS) # # A route with an output label # the TTL of the inner packet is decremented on LSP ingress # route_4oMPLSo4 = VppIpRoute( self, "1.1.2.22", 32,