-void handle_recv_data(meshlink_handle_t *mesh, meshlink_node_t *source, void *data, size_t len) {
- printf("Received %zu bytes from %s: %s\n", len, source->name, data);
+static void handle_recv_data(meshlink_handle_t *mesh, meshlink_node_t *source, void *data, size_t len) {
+ (void)mesh;
+
+ printf("Received %zu bytes from %s: %s\n", len, source->name, (char *)data);