+static void
+mq_send_session_cleanup_cb (session_t * s, session_cleanup_ntf_t ntf)
+{
+ svm_msg_q_msg_t _msg, *msg = &_msg;
+ session_cleanup_msg_t *mp;
+ svm_msg_q_t *app_mq;
+ session_event_t *evt;
+ app_worker_t *app_wrk;
+
+ /* Only propagate session cleanup notification */
+ if (ntf == SESSION_CLEANUP_TRANSPORT)
+ return;
+
+ app_wrk = app_worker_get_if_valid (s->app_wrk_index);
+ if (!app_wrk)
+ return;
+
+ app_mq = app_wrk->event_queue;
+ if (mq_try_lock_and_alloc_msg (app_mq, msg))
+ return;
+
+ evt = svm_msg_q_msg_data (app_mq, msg);
+ clib_memset (evt, 0, sizeof (*evt));
+ evt->event_type = SESSION_CTRL_EVT_CLEANUP;
+ mp = (session_cleanup_msg_t *) evt->data;
+ mp->handle = session_handle (s);
+ svm_msg_q_add_and_unlock (app_mq, msg);
+}
+
+/* ### WILL BE DEPRECATED POST 20.01 ### */
+static session_cb_vft_t session_mq_cb_vft_old = {
+ .session_accept_callback = mq_send_session_accepted_cb,
+ .session_disconnect_callback = mq_send_session_disconnected_cb,
+ .session_connected_callback = mq_send_session_connected_cb,
+ .session_reset_callback = mq_send_session_reset_cb,
+ .session_migrate_callback = mq_send_session_migrate_cb,
+ .add_segment_callback = send_add_segment_callback,
+ .del_segment_callback = send_del_segment_callback,
+};
+
+static session_cb_vft_t session_mq_cb_vft = {
+ .session_accept_callback = mq_send_session_accepted_cb,
+ .session_disconnect_callback = mq_send_session_disconnected_cb,
+ .session_connected_callback = mq_send_session_connected_cb,
+ .session_reset_callback = mq_send_session_reset_cb,
+ .session_migrate_callback = mq_send_session_migrate_cb,
+ .session_cleanup_callback = mq_send_session_cleanup_cb,
+ .add_segment_callback = mq_send_add_segment_cb,
+ .del_segment_callback = mq_send_del_segment_cb,
+};
+
+static void
+vl_api_session_enable_disable_t_handler (vl_api_session_enable_disable_t * mp)
+{
+ vl_api_session_enable_disable_reply_t *rmp;
+ vlib_main_t *vm = vlib_get_main ();
+ int rv = 0;
+
+ vnet_session_enable_disable (vm, mp->is_enable);
+ REPLY_MACRO (VL_API_SESSION_ENABLE_DISABLE_REPLY);
+}
+
+/* ### WILL BE DEPRECATED POST 20.01 ### */
+static void
+vl_api_application_attach_t_handler (vl_api_application_attach_t * mp)
+{
+ int rv = 0, fds[SESSION_N_FD_TYPE], n_fds = 0;
+ vl_api_application_attach_reply_t *rmp;
+ ssvm_private_t *segp, *evt_q_segment;
+ vnet_app_attach_args_t _a, *a = &_a;
+ vl_api_registration_t *reg;
+ u8 fd_flags = 0;
+
+ reg = vl_api_client_index_to_registration (mp->client_index);
+ if (!reg)
+ return;
+
+ if (session_main_is_enabled () == 0)
+ {
+ rv = VNET_API_ERROR_FEATURE_DISABLED;
+ goto done;
+ }
+
+ STATIC_ASSERT (sizeof (u64) * APP_OPTIONS_N_OPTIONS <=
+ sizeof (mp->options),
+ "Out of options, fix api message definition");
+
+ clib_memset (a, 0, sizeof (*a));
+ a->api_client_index = mp->client_index;
+ a->options = mp->options;
+ a->session_cb_vft = &session_mq_cb_vft_old;
+ a->namespace_id =
+ (u8 *) vl_api_from_api_to_new_c_string (&mp->namespace_id);
+
+ if ((rv = vnet_application_attach (a)))
+ {
+ clib_warning ("attach returned: %d", rv);
+ vec_free (a->namespace_id);
+ goto done;
+ }
+ vec_free (a->namespace_id);
+
+ /* Send event queues segment */
+ if ((evt_q_segment = session_main_get_evt_q_segment ()))