#!/usr/bin/env python3 from framework import VppTestCase from ipaddress import IPv4Address from ipaddress import IPv6Address from scapy.contrib.gtp import * from scapy.all import * class TestSRv6EndMGTP4E(VppTestCase): """SRv6 End.M.GTP4.E (SRv6 -> GTP-U)""" @classmethod def setUpClass(cls): super(TestSRv6EndMGTP4E, cls).setUpClass() try: cls.create_pg_interfaces(range(2)) cls.pg_if_i = cls.pg_interfaces[0] cls.pg_if_o = cls.pg_interfaces[1] cls.pg_if_i.config_ip6() cls.pg_if_o.config_ip4() cls.ip4_dst = cls.pg_if_o.remote_ip4 # cls.ip4_src = cls.pg_if_o.local_ip4 cls.ip4_src = "192.168.192.10" for pg_if in cls.pg_interfaces: pg_if.admin_up() pg_if.resolve_arp() except Exception: super(TestSRv6EndMGTP4E, cls).tearDownClass() raise def create_packets(self, inner): ip4_dst = IPv4Address(str(self.ip4_dst)) # 32bit prefix + 32bit IPv4 DA + 8bit + 32bit TEID + 24bit dst = b"\xaa" * 4 + ip4_dst.packed + b"\x11" + b"\xbb" * 4 + b"\x11" * 3 ip6_dst = IPv6Address(dst) ip4_src = IPv4Address(str(self.ip4_src)) # 64bit prefix + 32bit IPv4 SA + 16 bit port + 16bit src = b"\xcc" * 8 + ip4_src.packed + b"\xdd" * 2 + b"\x11" * 2 ip6_src = IPv6Address(src) self.logger.info("ip4 dst: {}".format(ip4_dst)) self.logger.info("ip4 src: {}".format(ip4_src)) self.logger.info("ip6 dst (remote srgw): {}".format(ip6_dst)) self.logger.info("ip6 src (local srgw): {}".format(ip6_src)) pkts = list() for d, s in inner: pkt = ( Ether() / IPv6(dst=str(ip6_dst), src=str(ip6_src)) / IPv6ExtHdrSegmentRouting() / IPv6(dst=d, src=s) / UDP(sport=1000, dport=23) ) self.logger.info(pkt.show2(dump=True)) pkts.append(pkt) return pkts def test_srv6_mobile(self): """test_srv6_mobile""" pkts = self.create_packets([("A::1", "B::1"), ("C::1", "D::1")]) self.vapi.cli( "sr localsid address {} behavior end.m.gtp4.e ".format(pkts[0]["IPv6"].dst) + "v4src_position 64 fib-table 0" ) self.logger.info(self.vapi.cli("show sr localsid")) self.vapi.cli("clear errors") self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.logger.info(self.vapi.cli("show errors")) self.logger.info(self.vapi.cli("show int address")) capture = self.pg1.get_capture(len(pkts)) for pkt in capture: self.logger.info(pkt.show2(dump=True)) self.assertEqual(pkt[IP].dst, self.ip4_dst) self.assertEqual(pkt[IP].src, self.ip4_src) self.assertEqual(pkt[GTP_U_Header].teid, 0xBBBBBBBB) class TestSRv6TMGTP4D(VppTestCase): """SRv6 T.M.GTP4.D (GTP-U -> SRv6)""" @classmethod def setUpClass(cls): super(TestSRv6TMGTP4D, cls).setUpClass() try: cls.create_pg_interfaces(range(2)) cls.pg_if_i = cls.pg_interfaces[0] cls.pg_if_o = cls.pg_interfaces[1] cls.pg_if_i.config_ip4() cls.pg_if_i.config_ip6() cls.pg_if_o.config_ip4() cls.pg_if_o.config_ip6() cls.ip4_dst = "1.1.1.1" cls.ip4_src = "2.2.2.2" cls.ip6_dst = cls.pg_if_o.remote_ip6 for pg_if in cls.pg_interfaces: pg_if.admin_up() pg_if.resolve_arp() pg_if.resolve_ndp(timeout=5) except Exception: super(TestSRv6TMGTP4D, cls).tearDownClass() raise def create_packets(self, inner): ip4_dst = IPv4Address(str(self.ip4_dst)) ip4_src = IPv4Address(str(self.ip4_src)) self.logger.info("ip4 dst: {}".format(ip4_dst)) self.logger.info("ip4 src: {}".format(ip4_src)) pkts = list() for d, s in inner: pkt = ( Ether() / IP(dst=str(ip4_dst), src=str(ip4_src)) / UDP(sport=2152, dport=2152) / GTP_U_Header(gtp_type="g_pdu", teid=200) / IPv6(dst=d, src=s) / UDP(sport=1000, dport=23) ) self.logger.info(pkt.show2(dump=True)) pkts.append(pkt) return pkts def test_srv6_mobile(self): """test_srv6_mobile""" pkts = self.create_packets([("A::1", "B::1"), ("C::1", "D::1")]) self.vapi.cli("set sr encaps source addr A1::1") self.vapi.cli("sr policy add bsid D4:: next D2:: next D3::") self.vapi.cli( "sr policy add bsid D5:: behavior t.m.gtp4.d D4::/32 " + "v6src_prefix C1::/64 nhtype ipv6 fib-table 0 drop-in" ) self.vapi.cli("sr steer l3 {}/32 via bsid D5::".format(self.ip4_dst)) self.vapi.cli("ip route add D2::/32 via {}".format(self.ip6_dst)) self.logger.info(self.vapi.cli("show sr steer")) self.logger.info(self.vapi.cli("show sr policies")) self.vapi.cli("clear errors") self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.logger.info(self.vapi.cli("show errors")) self.logger.info(self.vapi.cli("show int address")) capture = self.pg1.get_capture(len(pkts)) for pkt in capture: self.logger.info(pkt.show2(dump=True)) self.logger.info( "GTP4.D Address={}".format( str(pkt[IPv6ExtHdrSegmentRouting].addresses[0]) ) ) self.assertEqual( str(pkt[IPv6ExtHdrSegmentRouting].addresses[0]), "d4:0:101:101::c800:0" ) class TestSRv6EndMGTP6E(VppTestCase): """SRv6 End.M.GTP6.E""" @classmethod def setUpClass(cls): super(TestSRv6EndMGTP6E, cls).setUpClass() try: cls.create_pg_interfaces(range(2)) cls.pg_if_i = cls.pg_interfaces[0] cls.pg_if_o = cls.pg_interfaces[1] cls.pg_if_i.config_ip6() cls.pg_if_o.config_ip6() cls.ip6_nhop = cls.pg_if_o.remote_ip6 for pg_if in cls.pg_interfaces: pg_if.admin_up() pg_if.resolve_ndp(timeout=5) except Exception: super(TestSRv6EndMGTP6E, cls).tearDownClass() raise def create_packets(self, inner): # 64bit prefix + 8bit QFI + 32bit TEID + 24bit dst = b"\xaa" * 8 + b"\x00" + b"\xbb" * 4 + b"\x00" * 3 ip6_dst = IPv6Address(dst) self.ip6_dst = ip6_dst src = b"\xcc" * 8 + b"\xdd" * 4 + b"\x11" * 4 ip6_src = IPv6Address(src) self.ip6_src = ip6_src pkts = list() for d, s in inner: pkt = ( Ether() / IPv6(dst=str(ip6_dst), src=str(ip6_src)) / IPv6ExtHdrSegmentRouting( segleft=1, lastentry=0, tag=0, addresses=["a1::1"] ) / IPv6(dst=d, src=s) / UDP(sport=1000, dport=23) ) self.logger.info(pkt.show2(dump=True)) pkts.append(pkt) return pkts def test_srv6_mobile(self): """test_srv6_mobile""" pkts = self.create_packets([("A::1", "B::1"), ("C::1", "D::1")]) self.vapi.cli( "sr localsid prefix {}/64 behavior end.m.gtp6.e fib-table 0".format( pkts[0]["IPv6"].dst ) ) self.vapi.cli("ip route add a1::/64 via {}".format(self.ip6_nhop)) self.logger.info(self.vapi.cli("show sr localsid")) self.vapi.cli("clear errors") self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.logger.info(self.vapi.cli("show errors")) self.logger.info(self.vapi.cli("show int address")) capture = self.pg1.get_capture(len(pkts)) for pkt in capture: self.logger.info(pkt.show2(dump=True)) self.assertEqual(pkt[IPv6].dst, "a1::1") self.assertEqual(pkt[IPv6].src, str(self.ip6_src)) self.assertEqual(pkt[GTP_U_Header].teid, 0xBBBBBBBB) class TestSRv6EndMGTP6D(VppTestCase): """SRv6 End.M.GTP6.D""" @classmethod def setUpClass(cls): super(TestSRv6EndMGTP6D, cls).setUpClass() try: cls.create_pg_interfaces(range(2)) cls.pg_if_i = cls.pg_interfaces[0] cls.pg_if_o = cls.pg_interfaces[1] cls.pg_if_i.config_ip6() cls.pg_if_o.config_ip6() cls.ip6_nhop = cls.pg_if_o.remote_ip6 cls.ip6_dst = "2001::1" cls.ip6_src = "2002::1" for pg_if in cls.pg_interfaces: pg_if.admin_up() pg_if.resolve_ndp(timeout=5) except Exception: super(TestSRv6EndMGTP6D, cls).tearDownClass() raise def create_packets(self, inner): ip6_dst = IPv6Address(str(self.ip6_dst)) ip6_src = IPv6Address(str(self.ip6_src)) self.logger.info("ip6 dst: {}".format(ip6_dst)) self.logger.info("ip6 src: {}".format(ip6_src)) pkts = list() for d, s in inner: pkt = ( Ether() / IPv6(dst=str(ip6_dst), src=str(ip6_src)) / UDP(sport=2152, dport=2152) / GTP_U_Header(gtp_type="g_pdu", teid=200) / IPv6(dst=d, src=s) / UDP(sport=1000, dport=23) ) self.logger.info(pkt.show2(dump=True)) pkts.append(pkt) return pkts def test_srv6_mobile(self): """test_srv6_mobile""" pkts = self.create_packets([("A::1", "B::1"), ("C::1", "D::1")]) self.vapi.cli("set sr encaps source addr A1::1") self.vapi.cli("sr policy add bsid D4:: next D2:: next D3::") self.vapi.cli( "sr localsid prefix 2001::/64 behavior end.m.gtp6.d " + "D4::/64 fib-table 0 drop-in" ) self.vapi.cli("ip route add D2::/64 via {}".format(self.ip6_nhop)) self.logger.info(self.vapi.cli("show sr policies")) self.logger.info(self.vapi.cli("show sr localsid")) self.vapi.cli("clear errors") self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.logger.info(self.vapi.cli("show errors")) self.logger.info(self.vapi.cli("show int address")) capture = self.pg1.get_capture(len(pkts)) for pkt in capture: self.logger.info(pkt.show2(dump=True)) self.logger.info( "GTP6.D SID0={}".format(str(pkt[IPv6ExtHdrSegmentRouting].addresses[0])) ) self.logger.info( "GTP6.D SID1={}".format(str(pkt[IPv6ExtHdrSegmentRouting].addresses[1])) ) self.assertEqual(str(pkt[IPv6ExtHdrSegmentRouting].addresses[0]), "2001::1") self.assertEqual( str(pkt[IPv6ExtHdrSegmentRouting].addresses[1]), "d4::c800:0" )