session: add explicit reset api

Type: feature

This can be used to forcefully close a session. It's only available to
builtin applications for now. Transports must support the reset api
otherwise normal close is used.

Change-Id: I5e6d681cbc4c8045385e293e0e9d86fa2bf45849
Signed-off-by: Florin Coras <fcoras@cisco.com>
diff --git a/src/vnet/session/transport.h b/src/vnet/session/transport.h
index c4f74eb..cbe3c36 100644
--- a/src/vnet/session/transport.h
+++ b/src/vnet/session/transport.h
@@ -39,6 +39,7 @@
   u32 (*stop_listen) (u32 conn_index);
   int (*connect) (transport_endpoint_cfg_t * rmt);
   void (*close) (u32 conn_index, u32 thread_index);
+  void (*reset) (u32 conn_index, u32 thread_index);
   void (*cleanup) (u32 conn_index, u32 thread_index);
   clib_error_t *(*enable) (vlib_main_t * vm, u8 is_en);
 
@@ -96,6 +97,7 @@
 
 int transport_connect (transport_proto_t tp, transport_endpoint_cfg_t * tep);
 void transport_close (transport_proto_t tp, u32 conn_index, u8 thread_index);
+void transport_reset (transport_proto_t tp, u32 conn_index, u8 thread_index);
 u32 transport_start_listen (transport_proto_t tp, u32 session_index,
 			    transport_endpoint_t * tep);
 u32 transport_stop_listen (transport_proto_t tp, u32 conn_index);