NAT66 1:1 mapping (VPP-1108)

Support the 1:1 translation of source address for IPv6

Change-Id: I934d18e5ec508bf7422d796ee5f172b79c048011
Signed-off-by: Matus Fabian <matfabia@cisco.com>

1 files changed, 131 insertions, 0 deletions

diff --git a/test/test_nat.py b/test/test_nat.py
index e3b44859f61..7ff3f8517ad 100644
--- a/test/test_nat.py
+++ b/test/test_nat.py
@@ -6185,5 +6185,136 @@ class TestDSliteCE(MethodHolder):
             self.logger.info(
                 self.vapi.cli("show dslite b4-tunnel-endpoint-address"))
 
+
+class TestNAT66(MethodHolder):
+    """ NAT66 Test Cases """
+
+    @classmethod
+    def setUpClass(cls):
+        super(TestNAT66, cls).setUpClass()
+
+        try:
+            cls.nat_addr = 'fd01:ff::2'
+            cls.nat_addr_n = socket.inet_pton(socket.AF_INET6, cls.nat_addr)
+
+            cls.create_pg_interfaces(range(2))
+            cls.interfaces = list(cls.pg_interfaces)
+
+            for i in cls.interfaces:
+                i.admin_up()
+                i.config_ip6()
+                i.configure_ipv6_neighbors()
+
+        except Exception:
+            super(TestNAT66, cls).tearDownClass()
+            raise
+
+    def test_static(self):
+        """ 1:1 NAT66 test """
+        self.vapi.nat66_add_del_interface(self.pg0.sw_if_index)
+        self.vapi.nat66_add_del_interface(self.pg1.sw_if_index, is_inside=0)
+        self.vapi.nat66_add_del_static_mapping(self.pg0.remote_ip6n,
+                                               self.nat_addr_n)
+
+        # in2out
+        pkts = []
+        p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+             IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6) /
+             TCP())
+        pkts.append(p)
+        p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+             IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6) /
+             UDP())
+        pkts.append(p)
+        p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+             IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6) /
+             ICMPv6EchoRequest())
+        pkts.append(p)
+        p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+             IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6) /
+             GRE() / IP() / TCP())
+        pkts.append(p)
+        self.pg0.add_stream(pkts)
+        self.pg_enable_capture(self.pg_interfaces)
+        self.pg_start()
+        capture = self.pg1.get_capture(len(pkts))
+        for packet in capture:
+            try:
+                self.assertEqual(packet[IPv6].src, self.nat_addr)
+                self.assertEqual(packet[IPv6].dst, self.pg1.remote_ip6)
+                if packet.haslayer(TCP):
+                    self.check_tcp_checksum(packet)
+                elif packet.haslayer(UDP):
+                    self.check_udp_checksum(packet)
+                elif packet.haslayer(ICMPv6EchoRequest):
+                    self.check_icmpv6_checksum(packet)
+            except:
+                self.logger.error(ppp("Unexpected or invalid packet:", packet))
+                raise
+
+        # out2in
+        pkts = []
+        p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+             IPv6(src=self.pg1.remote_ip6, dst=self.nat_addr) /
+             TCP())
+        pkts.append(p)
+        p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+             IPv6(src=self.pg1.remote_ip6, dst=self.nat_addr) /
+             UDP())
+        pkts.append(p)
+        p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+             IPv6(src=self.pg1.remote_ip6, dst=self.nat_addr) /
+             ICMPv6EchoReply())
+        pkts.append(p)
+        p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+             IPv6(src=self.pg1.remote_ip6, dst=self.nat_addr) /
+             GRE() / IP() / TCP())
+        pkts.append(p)
+        self.pg1.add_stream(pkts)
+        self.pg_enable_capture(self.pg_interfaces)
+        self.pg_start()
+        capture = self.pg0.get_capture(len(pkts))
+        for packet in capture:
+            try:
+                self.assertEqual(packet[IPv6].src, self.pg1.remote_ip6)
+                self.assertEqual(packet[IPv6].dst, self.pg0.remote_ip6)
+                if packet.haslayer(TCP):
+                    self.check_tcp_checksum(packet)
+                elif packet.haslayer(UDP):
+                    self.check_udp_checksum(packet)
+                elif packet.haslayer(ICMPv6EchoReply):
+                    self.check_icmpv6_checksum(packet)
+            except:
+                self.logger.error(ppp("Unexpected or invalid packet:", packet))
+                raise
+
+        sm = self.vapi.nat66_static_mapping_dump()
+        self.assertEqual(len(sm), 1)
+        self.assertEqual(sm[0].total_pkts, 8)
+
+    def clear_nat66(self):
+        """
+        Clear NAT66 configuration.
+        """
+        interfaces = self.vapi.nat66_interface_dump()
+        for intf in interfaces:
+            self.vapi.nat66_add_del_interface(intf.sw_if_index,
+                                              intf.is_inside,
+                                              is_add=0)
+
+        static_mappings = self.vapi.nat66_static_mapping_dump()
+        for sm in static_mappings:
+            self.vapi.nat66_add_del_static_mapping(sm.local_ip_address,
+                                                   sm.external_ip_address,
+                                                   sm.vrf_id,
+                                                   is_add=0)
+
+    def tearDown(self):
+        super(TestNAT66, self).tearDown()
+        if not self.vpp_dead:
+            self.logger.info(self.vapi.cli("show nat66 interfaces"))
+            self.logger.info(self.vapi.cli("show nat66 static mappings"))
+            self.clear_nat66()
+
 if __name__ == '__main__':
     unittest.main(testRunner=VppTestRunner)