tls: allow engines to customize close

Change-Id: I11ac3e4f59206902e5dfc326f815c877c5dd6643
Signed-off-by: Florin Coras <fcoras@cisco.com>

4 files changed, 74 insertions, 18 deletions

diff --git a/src/plugins/tlsmbedtls/tls_mbedtls.c b/src/plugins/tlsmbedtls/tls_mbedtls.c
index 6b56f5f0604..c54d17cd121 100644
--- a/src/plugins/tlsmbedtls/tls_mbedtls.c
+++ b/src/plugins/tlsmbedtls/tls_mbedtls.c
@@ -100,6 +100,7 @@ mbedtls_ctx_free (tls_ctx_t * ctx)
   mbedtls_ssl_free (&mc->ssl);
   mbedtls_ssl_config_free (&mc->conf);
 
+  vec_free (ctx->srv_hostname);
   pool_put_index (mbedtls_main.ctx_pool[ctx->c_thread_index],
 		  mc->mbedtls_ctx_index);
 }
@@ -536,6 +537,27 @@ mbedtls_handshake_is_over (tls_ctx_t * ctx)
   return (mc->ssl.state == MBEDTLS_SSL_HANDSHAKE_OVER);
 }
 
+static int
+mbedtls_transport_close (tls_ctx_t * ctx)
+{
+  if (!mbedtls_handshake_is_over (ctx))
+    {
+      session_close (session_get_from_handle (ctx->tls_session_handle));
+      return 0;
+    }
+  session_transport_closing_notify (&ctx->connection);
+  return 0;
+}
+
+static int
+mbedtls_app_close (tls_ctx_t * ctx)
+{
+  tls_disconnect_transport (ctx);
+  session_transport_delete_notify (&ctx->connection);
+  mbedtls_ctx_free (ctx);
+  return 0;
+}
+
 const static tls_engine_vft_t mbedtls_engine = {
   .ctx_alloc = mbedtls_ctx_alloc,
   .ctx_free = mbedtls_ctx_free,
@@ -548,6 +570,8 @@ const static tls_engine_vft_t mbedtls_engine = {
   .ctx_handshake_is_over = mbedtls_handshake_is_over,
   .ctx_start_listen = mbedtls_start_listen,
   .ctx_stop_listen = mbedtls_stop_listen,
+  .ctx_transport_close = mbedtls_transport_close,
+  .ctx_app_close = mbedtls_app_close,
 };
 
 int
diff --git a/src/plugins/tlsopenssl/tls_openssl.c b/src/plugins/tlsopenssl/tls_openssl.c
index d99a89c3d9c..976ccb4e062 100644
--- a/src/plugins/tlsopenssl/tls_openssl.c
+++ b/src/plugins/tlsopenssl/tls_openssl.c
@@ -58,6 +58,7 @@ openssl_ctx_free (tls_ctx_t * ctx)
 
   SSL_free (oc->ssl);
 
+  vec_free (ctx->srv_hostname);
   pool_put_index (openssl_main.ctx_pool[ctx->c_thread_index],
 		  oc->openssl_ctx_index);
 }
@@ -725,6 +726,27 @@ openssl_handshake_is_over (tls_ctx_t * ctx)
   return SSL_is_init_finished (mc->ssl);
 }
 
+static int
+openssl_transport_close (tls_ctx_t * ctx)
+{
+  if (!openssl_handshake_is_over (ctx))
+    {
+      session_close (session_get_from_handle (ctx->tls_session_handle));
+      return 0;
+    }
+  session_transport_closing_notify (&ctx->connection);
+  return 0;
+}
+
+static int
+openssl_app_close (tls_ctx_t * ctx)
+{
+  tls_disconnect_transport (ctx);
+  session_transport_delete_notify (&ctx->connection);
+  openssl_ctx_free (ctx);
+  return 0;
+}
+
 const static tls_engine_vft_t openssl_engine = {
   .ctx_alloc = openssl_ctx_alloc,
   .ctx_free = openssl_ctx_free,
@@ -737,6 +759,8 @@ const static tls_engine_vft_t openssl_engine = {
   .ctx_handshake_is_over = openssl_handshake_is_over,
   .ctx_start_listen = openssl_start_listen,
   .ctx_stop_listen = openssl_stop_listen,
+  .ctx_transport_close = openssl_transport_close,
+  .ctx_app_close = openssl_app_close,
 };
 
 int
diff --git a/src/vnet/tls/tls.c b/src/vnet/tls/tls.c
index 81b51f5dcc8..4d042d6bc85 100644
--- a/src/vnet/tls/tls.c
+++ b/src/vnet/tls/tls.c
@@ -26,7 +26,7 @@ static tls_engine_vft_t *tls_vfts;
 
 void tls_disconnect (u32 ctx_handle, u32 thread_index);
 
-static void
+void
 tls_disconnect_transport (tls_ctx_t * ctx)
 {
   vnet_disconnect_args_t a = {
@@ -287,13 +287,6 @@ tls_ctx_alloc (tls_engine_type_t engine_type)
   return (((u32) engine_type << TLS_ENGINE_TYPE_SHIFT) | ctx_index);
 }
 
-static inline void
-tls_ctx_free (tls_ctx_t * ctx)
-{
-  vec_free (ctx->srv_hostname);
-  tls_vfts[ctx->tls_ctx_engine].ctx_free (ctx);
-}
-
 static inline tls_ctx_t *
 tls_ctx_get (u32 ctx_handle)
 {
@@ -334,7 +327,26 @@ tls_ctx_read (tls_ctx_t * ctx, session_t * tls_session)
   return tls_vfts[ctx->tls_ctx_engine].ctx_read (ctx, tls_session);
 }
 
-static inline u8
+static inline int
+tls_ctx_transport_close (tls_ctx_t * ctx)
+{
+  return tls_vfts[ctx->tls_ctx_engine].ctx_transport_close (ctx);
+}
+
+static inline int
+tls_ctx_app_close (tls_ctx_t * ctx)
+{
+  return tls_vfts[ctx->tls_ctx_engine].ctx_app_close (ctx);
+}
+
+void
+tls_ctx_free (tls_ctx_t * ctx)
+{
+  vec_free (ctx->srv_hostname);
+  tls_vfts[ctx->tls_ctx_engine].ctx_free (ctx);
+}
+
+u8
 tls_ctx_handshake_is_over (tls_ctx_t * ctx)
 {
   return tls_vfts[ctx->tls_ctx_engine].ctx_handshake_is_over (ctx);
@@ -368,13 +380,8 @@ tls_session_disconnect_callback (session_t * tls_session)
 	   tls_session->session_index);
 
   ctx = tls_ctx_get (tls_session->opaque);
-  if (!tls_ctx_handshake_is_over (ctx))
-    {
-      session_close (tls_session);
-      return;
-    }
   ctx->is_passive_close = 1;
-  session_transport_closing_notify (&ctx->connection);
+  tls_ctx_transport_close (ctx);
 }
 
 int
@@ -542,9 +549,7 @@ tls_disconnect (u32 ctx_handle, u32 thread_index)
   TLS_DBG (1, "Disconnecting %x", ctx_handle);
 
   ctx = tls_ctx_get (ctx_handle);
-  tls_disconnect_transport (ctx);
-  session_transport_delete_notify (&ctx->connection);
-  tls_ctx_free (ctx);
+  tls_ctx_app_close (ctx);
 }
 
 u32
diff --git a/src/vnet/tls/tls.h b/src/vnet/tls/tls.h
index fffffec9422..6de6924d390 100644
--- a/src/vnet/tls/tls.h
+++ b/src/vnet/tls/tls.h
@@ -109,6 +109,8 @@ typedef struct tls_engine_vft_
     u8 (*ctx_handshake_is_over) (tls_ctx_t * ctx);
   int (*ctx_start_listen) (tls_ctx_t * ctx);
   int (*ctx_stop_listen) (tls_ctx_t * ctx);
+  int (*ctx_transport_close) (tls_ctx_t * ctx);
+  int (*ctx_app_close) (tls_ctx_t * ctx);
 } tls_engine_vft_t;
 
 tls_main_t *vnet_tls_get_main (void);
@@ -121,6 +123,7 @@ int tls_add_vpp_q_builtin_rx_evt (session_t * s);
 int tls_notify_app_accept (tls_ctx_t * ctx);
 int tls_notify_app_connected (tls_ctx_t * ctx, u8 is_failed);
 void tls_notify_app_enqueue (tls_ctx_t * ctx, session_t * app_session);
+void tls_disconnect_transport (tls_ctx_t * ctx);
 #endif /* SRC_VNET_TLS_TLS_H_ */
 
 /*