-static void test_case_set_channel_receive_cb_04(void **state);
-static bool test_steps_set_channel_receive_cb_04(void);
-
-static void channel_poll(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t len);
-static bool channel_accept(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len);