tftp服务器应该是可读写的而不是只读的

src/main.rs

@@ -14,7 +14,7 @@ struct ServerState {
 async fn start_tftp_server(dir: PathBuf) -> Result<(JoinHandle<()>, AbortHandle)> {
     let task = tokio::spawn(async move {
         println!("Starting TFTP server at: {:?}", dir);
-        let tftpd = TftpServerBuilder::with_dir_ro(&dir)
+        let tftpd = TftpServerBuilder::with_dir_rw(&dir)
         .expect("Failed to create server")
             .build()
             .await