struct ubus_msg_buf *ubus_msg_new(void *data, int len, bool shared);
void ubus_msg_send(struct ubus_client *cl, struct ubus_msg_buf *ub);
+ssize_t ubus_msg_writev(int fd, struct ubus_msg_buf *ub, size_t offset);
void ubus_msg_free(struct ubus_msg_buf *ub);
struct blob_attr **ubus_parse_msg(struct blob_attr *msg);