session: first approximation implementation of tls

It consists of two main parts. First, add an application transport type
whereby applications can offer transport to other applications. For
instance, a tls app can offer transport services to other applications.
And second, a tls transport app that leverages the mbedtls library for
tls protocol implementation.

Change-Id: I616996c6e6539a9e2368fab8a1ac874d7c5d9838
Signed-off-by: Florin Coras <fcoras@cisco.com>
diff --git a/src/vnet/session/session_test.c b/src/vnet/session/session_test.c
index 85e8732..91ac351 100644
--- a/src/vnet/session/session_test.c
+++ b/src/vnet/session/session_test.c
@@ -69,12 +69,6 @@
   return 0;
 }
 
-int
-dummy_redirect_connect_callback (u32 client_index, void *mp)
-{
-  return VNET_API_ERROR_SESSION_REDIRECT;
-}
-
 void
 dummy_session_disconnect_callback (stream_session_t * s)
 {
@@ -104,7 +98,7 @@
   .session_connected_callback = dummy_session_connected_callback,
   .session_accept_callback = dummy_session_accept_callback,
   .session_disconnect_callback = dummy_session_disconnect_callback,
-  .builtin_server_rx_callback = dummy_server_rx_callback,
+  .builtin_app_rx_callback = dummy_server_rx_callback,
   .add_segment_callback = dummy_add_segment_callback,
   .del_segment_callback = dummy_del_segment_callback,
 };
@@ -1316,8 +1310,10 @@
   SESSION_TEST ((handle == SESSION_DROP_HANDLE), "lookup for 1.2.3.4/32 1234 "
 		"5.6.7.8/16 432*2* in local table should return deny");
 
+
   connect_args.app_index = server_index;
   connect_args.sep = sep;
+
   error = vnet_connect (&connect_args);
   SESSION_TEST ((error != 0), "connect should fail");
   rv = clib_error_get_code (error);