ipsec: support 4o6 and 6o4 for tunnel protect

Type: feature

Change-Id: Ib2352ca4c7abf4645f21fa16aaaf27408890a2bf
Signed-off-by: Neale Ranns <nranns@cisco.com>
(cherry picked from commit b325983a44)

src/vnet/ipsec/esp_encrypt.c

@@ -630,6 +630,13 @@ VNET_FEATURE_INIT (esp4_encrypt_tun_feat_node, static) =
   .runs_before = VNET_FEATURES ("adj-midchain-tx"),
 };
 
+VNET_FEATURE_INIT (esp6o4_encrypt_tun_feat_node, static) =
+{
+  .arc_name = "ip6-output",
+  .node_name = "esp4-encrypt-tun",
+  .runs_before = VNET_FEATURES ("adj-midchain-tx"),
+};
+
 VNET_FEATURE_INIT (esp4_ethernet_encrypt_tun_feat_node, static) =
 {
   .arc_name = "ethernet-output",
@@ -667,6 +674,14 @@ VNET_FEATURE_INIT (esp6_encrypt_tun_feat_node, static) =
   .node_name = "esp6-encrypt-tun",
   .runs_before = VNET_FEATURES ("adj-midchain-tx"),
 };
+
+VNET_FEATURE_INIT (esp4o6_encrypt_tun_feat_node, static) =
+{
+  .arc_name = "ip4-output",
+  .node_name = "esp6-encrypt-tun",
+  .runs_before = VNET_FEATURES ("adj-midchain-tx"),
+};
+
 /* *INDENT-ON* */
 
 typedef struct

src/vnet/ipsec/ipsec_tun.c

@@ -39,38 +39,29 @@ static int
 ipsec_tun_protect_feature_set (ipsec_tun_protect_t * itp, u8 enable)
 {
   u32 sai = itp->itp_out_sa;
-  int is_ip4, is_l2, rv;
+  int rv;
 
-  is_ip4 = ip46_address_is_ip4 (&itp->itp_tun.src);
+  const char *enc_node = (ip46_address_is_ip4 (&itp->itp_tun.src) ?
-  is_l2 = itp->itp_flags & IPSEC_PROTECT_L2;
+			  "esp4-encrypt-tun" : "esp6-encrypt-tun");
 
-  if (is_ip4)
+  if (itp->itp_flags & IPSEC_PROTECT_L2)
     {
-      if (is_l2)
       rv = vnet_feature_enable_disable ("ethernet-output",
-					  "esp4-encrypt-tun",
+					enc_node,
 					itp->itp_sw_if_index, enable,
 					&sai, sizeof (sai));
+    }
   else
+    {
       rv = vnet_feature_enable_disable ("ip4-output",
-					  "esp4-encrypt-tun",
+					enc_node,
 					itp->itp_sw_if_index, enable,
 					&sai, sizeof (sai));
-    }
-  else
-    {
-      if (is_l2)
-	rv = vnet_feature_enable_disable ("ethernet-output",
-					  "esp6-encrypt-tun",
-					  itp->itp_sw_if_index, enable,
-					  &sai, sizeof (sai));
-      else
       rv = vnet_feature_enable_disable ("ip6-output",
-					  "esp6-encrypt-tun",
+					enc_node,
 					itp->itp_sw_if_index, enable,
 					&sai, sizeof (sai));
     }
-
   ASSERT (!rv);
   return (rv);
 }

test/test_ipsec_tun_if_esp.py

@@ -785,11 +785,17 @@ class TemplateIpsec4TunProtect(object):
         p.tun_if.add_vpp_config()
         p.tun_if.admin_up()
         p.tun_if.config_ip4()
+        p.tun_if.config_ip6()
 
         p.route = VppIpRoute(self, p.remote_tun_if_host, 32,
                              [VppRoutePath(p.tun_if.remote_ip4,
                                            0xffffffff)])
         p.route.add_vpp_config()
+        r = VppIpRoute(self, p.remote_tun_if_host6, 128,
+                       [VppRoutePath(p.tun_if.remote_ip6,
+                                     0xffffffff,
+                                     proto=DpoProto.DPO_PROTO_IP6)])
+        r.add_vpp_config()
 
     def unconfig_network(self, p):
         p.route.remove_vpp_config()
@@ -831,6 +837,13 @@ class TestIpsec4TunProtect(TemplateIpsec,
         c = p.tun_if.get_tx_stats()
         self.assertEqual(c['packets'], 127)
 
+        self.vapi.cli("clear ipsec sa")
+        self.verify_tun_64(p, count=127)
+        c = p.tun_if.get_rx_stats()
+        self.assertEqual(c['packets'], 254)
+        c = p.tun_if.get_tx_stats()
+        self.assertEqual(c['packets'], 254)
+
         # rekey - create new SAs and update the tunnel protection
         np = copy.copy(p)
         np.crypt_key = 'X' + p.crypt_key[1:]
@@ -847,9 +860,9 @@ class TestIpsec4TunProtect(TemplateIpsec,
 
         self.verify_tun_44(np, count=127)
         c = p.tun_if.get_rx_stats()
-        self.assertEqual(c['packets'], 254)
+        self.assertEqual(c['packets'], 381)
         c = p.tun_if.get_tx_stats()
-        self.assertEqual(c['packets'], 254)
+        self.assertEqual(c['packets'], 381)
 
         # teardown
         self.unconfig_protect(np)
@@ -1052,12 +1065,17 @@ class TemplateIpsec6TunProtect(object):
         p.tun_if.add_vpp_config()
         p.tun_if.admin_up()
         p.tun_if.config_ip6()
+        p.tun_if.config_ip4()
 
         p.route = VppIpRoute(self, p.remote_tun_if_host, 128,
                              [VppRoutePath(p.tun_if.remote_ip6,
                                            0xffffffff,
                                            proto=DpoProto.DPO_PROTO_IP6)])
         p.route.add_vpp_config()
+        r = VppIpRoute(self, p.remote_tun_if_host4, 32,
+                       [VppRoutePath(p.tun_if.remote_ip4,
+                                     0xffffffff)])
+        r.add_vpp_config()
 
     def unconfig_network(self, p):
         p.route.remove_vpp_config()
@@ -1167,6 +1185,26 @@ class TestIpsec6TunProtect(TemplateIpsec,
         self.unconfig_sa(np3)
         self.unconfig_network(p)
 
+    def test_tun_46(self):
+        """IPSEC tunnel protect"""
+
+        p = self.ipv6_params
+
+        self.config_network(p)
+        self.config_sa_tra(p)
+        self.config_protect(p)
+
+        self.verify_tun_46(p, count=127)
+        c = p.tun_if.get_rx_stats()
+        self.assertEqual(c['packets'], 127)
+        c = p.tun_if.get_tx_stats()
+        self.assertEqual(c['packets'], 127)
+
+        # teardown
+        self.unconfig_protect(p)
+        self.unconfig_sa(p)
+        self.unconfig_network(p)
+
 
 class TestIpsec6TunProtectTun(TemplateIpsec,
                               TemplateIpsec6TunProtect,