+static void
+vcl_session_cleanup_handler (vcl_worker_t * wrk, void *data)
+{
+ session_cleanup_msg_t *msg;
+ vcl_session_t *session;
+
+ msg = (session_cleanup_msg_t *) data;
+ session = vcl_session_get_w_vpp_handle (wrk, msg->handle);
+ if (!session)
+ {
+ VDBG (0, "disconnect confirmed for unknown handle 0x%llx", msg->handle);
+ return;
+ }
+
+ if (msg->type == SESSION_CLEANUP_TRANSPORT)
+ {
+ /* Transport was cleaned up before we confirmed close. Probably the
+ * app is still waiting for some data that cannot be delivered.
+ * Confirm close to make sure everything is cleaned up */
+ if (session->session_state == VCL_STATE_VPP_CLOSING
+ || session->session_state == VCL_STATE_DISCONNECT)
+ {
+ vcl_session_cleanup (wrk, session, vcl_session_handle (session),
+ 1 /* do_disconnect */ );
+ /* Move to undetermined state to ensure that the session is not
+ * removed before both vpp and the app cleanup.
+ * - If the app closes first, the session is moved to CLOSED state
+ * and the session cleanup notification from vpp removes the
+ * session.
+ * - If vpp cleans up the session first, the session is moved to
+ * DETACHED state lower and subsequently the close from the app
+ * frees the session
+ */
+ session->session_state = VCL_STATE_UPDATED;
+ }
+ return;
+ }
+
+ vcl_session_table_del_vpp_handle (wrk, msg->handle);
+ /* Should not happen. App did not close the connection so don't free it. */
+ if (session->session_state != VCL_STATE_CLOSED)
+ {
+ VDBG (0, "app did not close session %d", session->session_index);
+ session->session_state = VCL_STATE_DETACHED;
+ session->vpp_handle = VCL_INVALID_SESSION_HANDLE;
+ return;
+ }
+ vcl_session_free (wrk, session);
+}
+