ipsec: ipsec-tun protect

please consult the new tunnel proposal at:
  https://wiki.fd.io/view/VPP/IPSec

Type: feature

Change-Id: I52857fc92ae068b85f59be08bdbea1bd5932e291
Signed-off-by: Neale Ranns <nranns@cisco.com>

test/vpp_ipip_tun_interface.py

@@ -0,0 +1,40 @@
+from vpp_tunnel_interface import VppTunnelInterface
+from ipaddress import ip_address
+
+
+class VppIpIpTunInterface(VppTunnelInterface):
+    """
+    VPP IP-IP Tunnel interface
+    """
+
+    def __init__(self, test, parent_if, src, dst):
+        super(VppIpIpTunInterface, self).__init__(test, parent_if)
+        self.src = src
+        self.dst = dst
+
+    def add_vpp_config(self):
+        r = self.test.vapi.ipip_add_tunnel(
+            tunnel={
+                'src': self.src,
+                'dst': self.dst,
+                'table_id': 0,
+                'instance': 0xffffffff,
+            })
+        self.set_sw_if_index(r.sw_if_index)
+        self.test.registry.register(self, self.test.logger)
+
+    def remove_vpp_config(self):
+        self.test.vapi.ipip_del_tunnel(sw_if_index=self._sw_if_index)
+
+    def query_vpp_config(self):
+        ts = self.test.vapi.ipip_tunnel_dump(sw_if_index=0xffffffff)
+        for t in ts:
+            if t.tunnel.sw_if_index == self._sw_if_index:
+                return True
+        return False
+
+    def __str__(self):
+        return self.object_id()
+
+    def object_id(self):
+        return "ipip-%d" % self._sw_if_index