srv6-mobile: Support GTP4/6.DT and User Plane message mapping

Support the following new features in srv6-mobile.

1. GTP4.DT
2. GTP6.DT
3. User Plane Message encoding based on draft-murakami-dmm-user-plane-message-encoding-01
4. Add SRv6 mobile test cases

Type: feature

Signed-off-by: Tetsuya Murakami <tetsuya.mrk@gmail.com>
Change-Id: I890e5171bf03513d54b4830f01b9dc7f47fe7c48
Signed-off-by: Tetsuya Murakami <tetsuya.mrk@gmail.com>

1 files changed, 340 insertions, 0 deletions

diff --git a/src/plugins/srv6-mobile/test/test_srv6_mobile.py b/src/plugins/srv6-mobile/test/test_srv6_mobile.py
new file mode 100644
index 00000000000..ec94b8b9c03
--- /dev/null
+++ b/src/plugins/srv6-mobile/test/test_srv6_mobile.py
@@ -0,0 +1,340 @@
+#!/usr/bin/env python
+
+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 v4src_position 64"
+            .format(pkts[0]['IPv6'].dst))
+        self.logger.info(self.vapi.cli("show sr localsids"))
+
+        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")
+        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 + 32bit TEID + 8bit QFI + 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"
+            .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 localsids"))
+
+        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")
+        self.vapi.cli("ip route add D2::/64 via {}".format(self.ip6_nhop))
+
+        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("GTP6.D Address={}".format(
+                str(pkt[IPv6ExtHdrSegmentRouting].addresses[0])))
+            self.assertEqual(
+                str(pkt[IPv6ExtHdrSegmentRouting].addresses[0]), "d4::c800:0")