tls: switch to vc service and track half-open sessions

Half-open tls sessions are now tracked by the app worker and are cleaned
up only when tcp cleans up its half-open session, i.e., independent of
when the established tls context is allocated.

Type: improvement

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: If5d594d7095192dd527daf4ea1358ffeccdfcc7a

5 files changed, 14 insertions, 6 deletions

diff --git a/src/vnet/session/application.h b/src/vnet/session/application.h
index eca3d3cf2c5..5ddf1d21fe3 100644
--- a/src/vnet/session/application.h
+++ b/src/vnet/session/application.h
@@ -314,7 +314,7 @@ int app_worker_init_connected (app_worker_t * app_wrk, session_t * s);
 int app_worker_connect_notify (app_worker_t * app_wrk, session_t * s,
 			       session_error_t err, u32 opaque);
 int app_worker_add_half_open (app_worker_t *app_wrk, session_handle_t sh);
-int app_worker_del_half_open (app_worker_t *app_wrk, u32 ho_index);
+int app_worker_del_half_open (app_worker_t *app_wrk, session_t *s);
 int app_worker_close_notify (app_worker_t * app_wrk, session_t * s);
 int app_worker_transport_closed_notify (app_worker_t * app_wrk,
 					session_t * s);
diff --git a/src/vnet/session/application_interface.h b/src/vnet/session/application_interface.h
index 14db42a0009..733f5dc0ef6 100644
--- a/src/vnet/session/application_interface.h
+++ b/src/vnet/session/application_interface.h
@@ -53,6 +53,9 @@ typedef struct session_cb_vft_
   /** Notify app that session or transport are about to be removed */
   void (*session_cleanup_callback) (session_t * s, session_cleanup_ntf_t ntf);
 
+  /** Notify app that half open state was cleaned up (optional) */
+  void (*half_open_cleanup_callback) (session_t *s);
+
   /** Notify app that session was reset */
   void (*session_reset_callback) (session_t * s);
 
diff --git a/src/vnet/session/application_worker.c b/src/vnet/session/application_worker.c
index b55c55aea47..fad70c06de3 100644
--- a/src/vnet/session/application_worker.c
+++ b/src/vnet/session/application_worker.c
@@ -393,10 +393,13 @@ app_worker_add_half_open (app_worker_t *app_wrk, session_handle_t sh)
 }
 
 int
-app_worker_del_half_open (app_worker_t *app_wrk, u32 ho_index)
+app_worker_del_half_open (app_worker_t *app_wrk, session_t *s)
 {
+  application_t *app = application_get (app_wrk->app_index);
   ASSERT (vlib_get_thread_index () == 0);
-  pool_put_index (app_wrk->half_open_table, ho_index);
+  pool_put_index (app_wrk->half_open_table, s->ho_index);
+  if (app->cb_fns.half_open_cleanup_callback)
+    app->cb_fns.half_open_cleanup_callback (s);
   return 0;
 }
 
diff --git a/src/vnet/session/session.c b/src/vnet/session/session.c
index 16b6ce412ac..0d2301c5f83 100644
--- a/src/vnet/session/session.c
+++ b/src/vnet/session/session.c
@@ -316,7 +316,7 @@ session_half_open_delete_notify (transport_connection_t *tc)
 
   s = ho_session_get (tc->s_index);
   app_wrk = app_worker_get (s->app_wrk_index);
-  app_worker_del_half_open (app_wrk, s->ho_index);
+  app_worker_del_half_open (app_wrk, s);
   session_free (s);
 }
 
@@ -339,7 +339,7 @@ session_alloc_for_connection (transport_connection_t * tc)
   return s;
 }
 
-static session_t *
+session_t *
 session_alloc_for_half_open (transport_connection_t *tc)
 {
   session_t *s;
@@ -1297,7 +1297,8 @@ session_open_vc (session_endpoint_cfg_t *rmt, session_handle_t *rsh)
   ho->opaque = rmt->opaque;
   *rsh = session_handle (ho);
 
-  session_lookup_add_half_open (tc, tc->c_index);
+  if (!(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP))
+    session_lookup_add_half_open (tc, tc->c_index);
 
   return 0;
 }
diff --git a/src/vnet/session/session.h b/src/vnet/session/session.h
index e29cdbfc933..d14c68971de 100644
--- a/src/vnet/session/session.h
+++ b/src/vnet/session/session.h
@@ -759,6 +759,7 @@ void session_node_enable_disable (u8 is_en);
 clib_error_t *vnet_session_enable_disable (vlib_main_t * vm, u8 is_en);
 
 session_t *session_alloc_for_connection (transport_connection_t * tc);
+session_t *session_alloc_for_half_open (transport_connection_t *tc);
 
 #endif /* __included_session_h__ */