6RD: Rewritten 6RD RFC5969 support.

Change-Id: Ic30fbcb2630f39e45345d7215babf5d7ed4b33a0
Signed-off-by: Ole Troan <ot@cisco.com>

3 files changed, 309 insertions, 1 deletions

diff --git a/test/Makefile b/test/Makefile
index 712dab07bde..b8826f6a88f 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -54,7 +54,7 @@ PYTHON_EXTRA_DEPENDS=
 endif
 
 PYTHON_VENV_PATH=$(VPP_PYTHON_PREFIX)/virtualenv
-PYTHON_DEPENDS=$(PYTHON_EXTRA_DEPENDS) faulthandler six scapy==2.3.3 pexpect pycrypto subprocess32 cffi git+https://github.com/klement/py-lispnetworking@setup
+PYTHON_DEPENDS=$(PYTHON_EXTRA_DEPENDS) faulthandler six scapy==2.3.3 pexpect pycrypto subprocess32 cffi git+https://github.com/klement/py-lispnetworking@setup py2-ipaddress
 SCAPY_SOURCE=$(shell find $(PYTHON_VENV_PATH) -name site-packages)
 BUILD_COV_DIR=$(BR)/test-cov
 
diff --git a/test/test_sixrd.py b/test/test_sixrd.py
new file mode 100644
index 00000000000..32ebdf4cca0
--- /dev/null
+++ b/test/test_sixrd.py
@@ -0,0 +1,289 @@
+#
+# 6RD RFC5969 functional tests
+#
+
+import unittest
+from scapy.layers.inet import IP, UDP, ICMP
+from scapy.layers.inet6 import IPv6
+from scapy.layers.l2 import Ether, GRE
+from scapy.packet import Raw
+
+from framework import VppTestCase
+from vpp_ip_route import VppIpRoute, VppRoutePath, DpoProto
+from util import ppp
+from ipaddress import *
+
+""" Test6rd is a subclass of  VPPTestCase classes.
+
+6RD tests.
+
+"""
+
+
+class Test6RD(VppTestCase):
+    """ 6RD Test Case """
+
+    @classmethod
+    def setUpClass(cls):
+        super(Test6RD, cls).setUpClass()
+        try:
+            cls.create_pg_interfaces(range(2))
+            cls.interfaces = list(cls.pg_interfaces)
+        except Exception:
+            super(Test6RD, cls).tearDownClass()
+            raise
+
+    def setUp(cls):
+        super(Test6RD, cls).setUp()
+        try:
+            for i in cls.interfaces:
+                i.admin_up()
+                i.config_ip4()
+                i.config_ip6()
+                i.disable_ipv6_ra()
+                i.resolve_arp()
+                i.resolve_ndp()
+        except Exception:
+            super(Test6RD, cls).tearDown()
+            raise
+
+    def tearDown(self):
+        super(Test6RD, self).tearDown()
+        if not self.vpp_dead:
+            self.vapi.cli("show hardware")
+        for i in self.pg_interfaces:
+            i.unconfig_ip4()
+            i.unconfig_ip6()
+            i.admin_down()
+        if type(self.tunnel_index) is list:
+            for sw_if_index in self.tunnel_index:
+                self.vapi.sixrd_del_tunnel(sw_if_index)
+        else:
+            self.vapi.sixrd_del_tunnel(self.tunnel_index)
+        self.vapi.cli("show error")
+
+    def validate_6in4(self, rx, expected):
+        if IP not in rx:
+            self.fail()
+        if IPv6 not in rx:
+            self.fail()
+
+        self.assertEqual(rx[IP].src, expected[IP].src)
+        self.assertEqual(rx[IP].dst, expected[IP].dst)
+        self.assertEqual(rx[IP].proto, expected[IP].proto)
+        self.assertEqual(rx[IPv6].src, expected[IPv6].src)
+        self.assertEqual(rx[IPv6].dst, expected[IPv6].dst)
+
+    def validate_4in6(self, rx, expected):
+        if IPv6 not in rx:
+            self.fail()
+        if IP in rx:
+            self.fail()
+
+        self.assertTrue(rx[IPv6].src == expected[IPv6].src)
+        self.assertTrue(rx[IPv6].dst == expected[IPv6].dst)
+        self.assertTrue(rx[IPv6].nh == expected[IPv6].nh)
+
+    def payload(self, len):
+        return 'x' * len
+
+    def test_6rd_ip6_to_ip4(self):
+        """ ip6 -> ip4 (encap) 6rd test """
+        p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
+        p_ip6 = IPv6(src="1::1", dst="2002:AC10:0202::1", nh='UDP')
+
+        rv = self.vapi.sixrd_add_tunnel(
+            0, str(ip_address('2002::').packed), 16,
+            str(ip_address('0.0.0.0').packed), 0,
+            str(ip_address(self.pg0.local_ip4).packed), 0, True)
+
+        self.assertEqual(rv.retval, 0)
+        self.tunnel_index = rv.sw_if_index
+        self.vapi.cli("show ip6 fib")
+        p_payload = UDP(sport=1234, dport=1234)
+        p = (p_ether / p_ip6 / p_payload)
+
+        p_reply = (IP(src=self.pg0.local_ip4, dst=self.pg1.remote_ip4,
+                      proto='ipv6') / p_ip6)
+
+        rx = self.send_and_expect(self.pg0, p*10, self.pg1)
+        for p in rx:
+            self.validate_6in4(p, p_reply)
+
+        # MTU tests (default is 1480)
+        plen = 1481 - 40 - 8
+        p_ip6 = IPv6(src="1::1", dst="2002:AC10:0202::1")
+        p_payload = UDP(sport=1234, dport=1234) / Raw(self.payload(plen))
+        p = (p_ether / p_ip6 / p_payload)
+
+        p_reply = (IP(src=self.pg0.local_ip4, dst=self.pg1.remote_ip4,
+                      proto='ipv6') / p_ip6)
+
+        rx = self.send_and_assert_no_replies(self.pg0, p*10)
+
+    def test_6rd_ip4_to_ip6(self):
+        """ ip4 -> ip6 (decap) 6rd test """
+
+        rv = self.vapi.sixrd_add_tunnel(
+            0, str(ip_address('2002::').packed),
+            16, str(ip_address('0.0.0.0').packed),
+            0, str(ip_address(self.pg0.local_ip4).packed), 0, True)
+        self.assertEqual(rv.retval, 0)
+        self.tunnel_index = rv.sw_if_index
+        self.vapi.cli("show ip6 fib")
+        p_ip6 = (IPv6(src="2002:AC10:0202::1", dst=self.pg1.remote_ip6) /
+                 UDP(sport=1234, dport=1234))
+
+        p = (Ether(src=self.pg0.remote_mac,
+                   dst=self.pg0.local_mac) /
+             IP(src=self.pg1.remote_ip4, dst=self.pg0.local_ip4) /
+             p_ip6)
+
+        p_reply = p_ip6
+
+        rx = self.send_and_expect(self.pg0, p*10, self.pg1)
+        for p in rx:
+            self.validate_4in6(p, p_reply)
+
+    def test_6rd_ip4_to_ip6_multiple(self):
+        """ ip4 -> ip6 (decap) 6rd test """
+
+        self.tunnel_index = []
+        rv = self.vapi.sixrd_add_tunnel(
+            0, str(ip_address('2002::').packed),
+            16, str(ip_address('0.0.0.0').packed),
+            0, str(ip_address(self.pg0.local_ip4).packed), 0, True)
+        self.assertEqual(rv.retval, 0)
+        self.tunnel_index.append(rv.sw_if_index)
+        rv = self.vapi.sixrd_add_tunnel(
+            0, str(ip_address('2003::').packed),
+            16, str(ip_address('0.0.0.0').packed),
+            0, str(ip_address(self.pg1.local_ip4).packed), 0, True)
+        self.assertEqual(rv.retval, 0)
+
+        self.tunnel_index.append(rv.sw_if_index)
+
+        self.vapi.cli("show ip6 fib")
+        p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
+        p_ip4 = IP(src=self.pg1.remote_ip4, dst=self.pg0.local_ip4)
+        p_ip6_1 = (IPv6(src="2002:AC10:0202::1", dst=self.pg1.remote_ip6) /
+                   UDP(sport=1234, dport=1234))
+        p_ip6_2 = (IPv6(src="2003:AC10:0202::1", dst=self.pg1.remote_ip6) /
+                   UDP(sport=1234, dport=1234))
+
+        p = (p_ether / p_ip4 / p_ip6_1)
+        rx = self.send_and_expect(self.pg0, p*10, self.pg1)
+        for p in rx:
+            self.validate_4in6(p, p_ip6_1)
+
+        p = (p_ether / p_ip4 / p_ip6_2)
+        rx = self.send_and_expect(self.pg0, p*10, self.pg1)
+        for p in rx:
+            self.validate_4in6(p, p_ip6_2)
+
+    def test_6rd_ip4_to_ip6_suffix(self):
+        """ ip4 -> ip6 (decap) 6rd test """
+
+        rv = self.vapi.sixrd_add_tunnel(
+            0, str(ip_address('2002::').packed), 16,
+            str(ip_address('172.0.0.0').packed), 8,
+            str(ip_address(self.pg0.local_ip4).packed), 0, True)
+        self.assertEqual(rv.retval, 0)
+
+        self.tunnel_index = rv.sw_if_index
+
+        self.vapi.cli("show ip6 fib")
+        p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
+        p_ip4 = IP(src=self.pg1.remote_ip4, dst=self.pg0.local_ip4)
+        p_ip6 = (IPv6(src="2002:1002:0200::1", dst=self.pg1.remote_ip6) /
+                 UDP(sport=1234, dport=1234))
+
+        p = (p_ether / p_ip4 / p_ip6)
+        rx = self.send_and_expect(self.pg0, p*10, self.pg1)
+        for p in rx:
+            self.validate_4in6(p, p_ip6)
+
+    def test_6rd_ip4_to_ip6_sec_check(self):
+        """ ip4 -> ip6 (decap) security check 6rd test """
+
+        rv = self.vapi.sixrd_add_tunnel(
+            0, str(ip_address('2002::').packed),
+            16, str(ip_address('0.0.0.0').packed),
+            0, str(ip_address(self.pg0.local_ip4).packed), 0, True)
+        self.assertEqual(rv.retval, 0)
+        self.tunnel_index = rv.sw_if_index
+        self.vapi.cli("show ip6 fib")
+        p_ip6 = (IPv6(src="2002:AC10:0202::1", dst=self.pg1.remote_ip6) /
+                 UDP(sport=1234, dport=1234))
+        p_ip6_fail = (IPv6(src="2002:DEAD:0202::1", dst=self.pg1.remote_ip6) /
+                      UDP(sport=1234, dport=1234))
+
+        p = (Ether(src=self.pg0.remote_mac,
+                   dst=self.pg0.local_mac) /
+             IP(src=self.pg1.remote_ip4, dst=self.pg0.local_ip4) /
+             p_ip6)
+
+        p_reply = p_ip6
+
+        rx = self.send_and_expect(self.pg0, p*10, self.pg1)
+        for p in rx:
+            self.validate_4in6(p, p_reply)
+
+        p = (Ether(src=self.pg0.remote_mac,
+                   dst=self.pg0.local_mac) /
+             IP(src=self.pg1.remote_ip4, dst=self.pg0.local_ip4) /
+             p_ip6_fail)
+        rx = self.send_and_assert_no_replies(self.pg0, p*10)
+
+    def test_6rd_bgp_tunnel(self):
+        """ 6rd BGP tunnel """
+
+        rv = self.vapi.sixrd_add_tunnel(
+            0, str(ip_address('2002::').packed),
+            16, str(ip_address('0.0.0.0').packed),
+            0, str(ip_address(self.pg0.local_ip4).packed), 0, False)
+        self.assertEqual(rv.retval, 0)
+        self.tunnel_index = rv.sw_if_index
+
+        default_route = VppIpRoute(
+            self, "DEAD::", 16, [VppRoutePath("2002:0808:0808::",
+                                              self.tunnel_index,
+                                              proto=DpoProto.DPO_PROTO_IP6)],
+            is_ip6=1)
+        default_route.add_vpp_config()
+
+        ip4_route = VppIpRoute(self, "8.0.0.0", 8,
+                               [VppRoutePath(self.pg1.remote_ip4, 0xFFFFFFFF)])
+        ip4_route.add_vpp_config()
+
+        # Via recursive route 6 -> 4
+        p = (Ether(src=self.pg0.remote_mac,
+                   dst=self.pg0.local_mac) /
+             IPv6(src="1::1", dst="DEAD:BEEF::1") /
+             UDP(sport=1234, dport=1234))
+
+        p_reply = (IP(src=self.pg0.local_ip4, dst="8.8.8.8",
+                      proto='ipv6') /
+                   IPv6(src='1::1', dst='DEAD:BEEF::1', nh='UDP'))
+
+        rx = self.send_and_expect(self.pg0, p*10, self.pg1)
+        for p in rx:
+            self.validate_6in4(p, p_reply)
+
+        # Via recursive route 4 -> 6 (Security check must be disabled)
+        p_ip6 = (IPv6(src="DEAD:BEEF::1", dst=self.pg1.remote_ip6) /
+                 UDP(sport=1234, dport=1234))
+        p = (Ether(src=self.pg0.remote_mac,
+                   dst=self.pg0.local_mac) /
+             IP(src="8.8.8.8", dst=self.pg0.local_ip4) /
+             p_ip6)
+
+        p_reply = p_ip6
+
+        rx = self.send_and_expect(self.pg0, p*10, self.pg1)
+        for p in rx:
+            self.validate_4in6(p, p_reply)
+
+
+if __name__ == '__main__':
+    unittest.main(testRunner=VppTestRunner)
diff --git a/test/vpp_papi_provider.py b/test/vpp_papi_provider.py
index 8e53333b624..99e320bfe60 100644
--- a/test/vpp_papi_provider.py
+++ b/test/vpp_papi_provider.py
@@ -3210,3 +3210,22 @@ class VppPapiProvider(object):
     def gbp_contract_dump(self):
         """ GBP contract Dump """
         return self.api(self.papi.gbp_contract_dump, {})
+
+    def sixrd_add_tunnel(self, fib_index, ip6_prefix, ip6_prefix_len,
+                         ip4_prefix, ip4_prefix_len, ip4_src, mtu,
+                         security_check):
+        """ 6RD tunnel Add """
+        return self.api(self.papi.sixrd_add_tunnel,
+                        {'fib_index': fib_index,
+                         'ip6_prefix': ip6_prefix,
+                         'ip6_prefix_len': ip6_prefix_len,
+                         'ip4_prefix': ip4_prefix,
+                         'ip4_prefix_len': ip4_prefix_len,
+                         'ip4_src': ip4_src,
+                         'mtu': mtu,
+                         'security_check': security_check})
+
+    def sixrd_del_tunnel(self, sw_if_index):
+        """ 6RD tunnel Delete """
+        return self.api(self.papi.sixrd_del_tunnel,
+                        {'sw_if_index': sw_if_index})