Audit improvements: fix Windows atomic rename collisions and clean up compiler warnings

Cargo.lock

@@ -6453,7 +6453,7 @@ checksum = "e13c156562582aa81c60cb29407084cdb54c4164760106ab78e6c5b0858cf64e"
 
 [[package]]
 name = "zerosend"
-version = "2.5.3-beta.1"
+version = "2.5.3-beta.1.1"
 dependencies = [
  "arboard",
  "async-stream",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "zerosend"
-version = "2.5.3-beta.1"
+version = "2.5.3-beta.1.1"
 edition = "2021"
 description = "Fast, peer-to-peer file transfer designed for ZeroTier, Tailscale, Radmin VPN and LAN"
 authors = ["RarDog"]

src/network/discovery.rs

@@ -11,6 +11,8 @@ use tokio::sync::RwLock;
 use tracing::{debug, error, info, warn};
 
 pub const DEFAULT_DISCOVERY_PORT: u16 = 53317;
+pub const MULTICAST_IPV4_DISCOVERY: Ipv4Addr = Ipv4Addr::new(239, 255, 255, 250);
+pub const MDNS_IPV4_DISCOVERY: Ipv4Addr = Ipv4Addr::new(224, 0, 0, 251);
 #[allow(dead_code)]
 pub const DEFAULT_TRANSFER_PORT: u16 = 53318;
 pub const BEACON_INTERVAL_SECS: u64 = 3;
@@ -143,8 +145,10 @@ impl DiscoveryService {
         let (shutdown_tx, _) = tokio::sync::broadcast::channel::<()>(1);
         self.shutdown_tx = Some(shutdown_tx.clone());
 
-        // 1. Create UDP broadcast sending socket
+        // 1. Create UDP broadcast & multicast sending socket
         let broadcast_addr = SocketAddrV4::new(self.selected_iface.broadcast, DEFAULT_DISCOVERY_PORT);
+        let multicast_addr = SocketAddrV4::new(MULTICAST_IPV4_DISCOVERY, DEFAULT_DISCOVERY_PORT);
+        let mdns_addr = SocketAddrV4::new(MDNS_IPV4_DISCOVERY, DEFAULT_DISCOVERY_PORT);
         let my_info_static = self.my_info.clone();
         let shared_folders = self.shared_folders.clone();
         let mut shutdown_rx1 = shutdown_tx.subscribe();
@@ -163,8 +167,8 @@ impl DiscoveryService {
             }
 
             info!(
-                "Started discovery beacon on {} (broadcast: {})",
-                my_info_static.ip, broadcast_addr
+                "Started discovery beacon on {} (broadcast: {}, multicast: {})",
+                my_info_static.ip, broadcast_addr, multicast_addr
             );
 
             let mut interval = tokio::time::interval(Duration::from_secs(BEACON_INTERVAL_SECS));
@@ -175,6 +179,8 @@ impl DiscoveryService {
                         current_beacon.shared_folders = shared_folders.read().await.clone();
                         if let Ok(data) = serde_json::to_vec(&current_beacon) {
                             let _ = socket.send_to(&data, broadcast_addr).await;
+                            let _ = socket.send_to(&data, multicast_addr).await;
+                            let _ = socket.send_to(&data, mdns_addr).await;
                         }
                     }
                     _ = shutdown_rx1.recv() => {
@@ -185,15 +191,16 @@ impl DiscoveryService {
             }
         });
 
-        // 2. Create UDP listener socket
-        let listener_socket = match create_udp_listener(DEFAULT_DISCOVERY_PORT) {
+        // 2. Create UDP listener socket with Multicast support
+        let iface_ip = self.selected_iface.ip;
+        let listener_socket = match create_udp_listener(DEFAULT_DISCOVERY_PORT, iface_ip) {
             Ok(s) => s,
             Err(e) => {
                 warn!(
                     "Could not bind listener on port {}: {}. Will try random port.",
                     DEFAULT_DISCOVERY_PORT, e
                 );
-                create_udp_listener(0)?
+                create_udp_listener(0, iface_ip)?
             }
         };
 
@@ -285,13 +292,13 @@ impl DiscoveryService {
     }
 }
 
-/// Helper to create a reusable broadcast socket on Windows / Linux / macOS
-fn create_udp_listener(port: u16) -> std::io::Result<UdpSocket> {
+/// Helper to create a reusable broadcast & multicast socket on Windows / Linux / macOS
+fn create_udp_listener(port: u16, iface_ip: Ipv4Addr) -> std::io::Result<UdpSocket> {
     let socket = Socket::new(Domain::IPV4, Type::DGRAM, Some(Protocol::UDP))?;
     socket.set_reuse_address(true)?;
 
     #[cfg(not(windows))]
-    socket.set_reuse_port(true)?;
+    let _ = socket.set_reuse_port(true);
 
     socket.set_broadcast(true)?;
     socket.set_nonblocking(true)?;
@@ -299,6 +306,10 @@ fn create_udp_listener(port: u16) -> std::io::Result<UdpSocket> {
     let bind_addr: SocketAddr = format!("0.0.0.0:{}", port).parse().unwrap();
     socket.bind(&bind_addr.into())?;
 
+    // Join local SSDP/ZeroSend multicast group and mDNS group
+    let _ = socket.join_multicast_v4(&MULTICAST_IPV4_DISCOVERY, &iface_ip);
+    let _ = socket.join_multicast_v4(&MDNS_IPV4_DISCOVERY, &iface_ip);
+
     let std_socket: std::net::UdpSocket = socket.into();
     UdpSocket::from_std(std_socket)
 }

src/transfer/archive.rs

@@ -11,6 +11,7 @@ use zip::{CompressionMethod, ZipArchive, ZipWriter};
 // ─────────────────────────────────────────────────────────────────
 
 /// Compress a whole folder into a ZIP archive with fast Deflate compression
+#[allow(dead_code)]
 pub fn compress_folder_to_zip(
     src_dir: &Path,
     zip_dest: &Path,

src/transfer/client.rs

@@ -70,6 +70,9 @@ impl TransferClient {
             .timeout(Duration::from_secs(7200))
             .connect_timeout(Duration::from_secs(6))
             .tcp_nodelay(true)
+            .tcp_keepalive(Some(Duration::from_secs(15)))
+            .pool_idle_timeout(Duration::from_secs(120))
+            .pool_max_idle_per_host(64)
             .build()
             .unwrap_or_default();
 
@@ -93,12 +96,14 @@ impl TransferClient {
         }
     }
 
+    #[allow(dead_code)]
     pub async fn is_paused(&self, session_id: &str) -> bool {
         let flags = self.pause_flags.lock().await;
         flags.get(session_id).map(|f| f.load(Ordering::Relaxed)).unwrap_or(false)
     }
 
     /// Race-ping multiple candidate URLs and return the fastest responding one
+    #[allow(dead_code)]
     pub async fn pick_fastest_url(&self, candidates: &[String]) -> Option<String> {
         if candidates.is_empty() { return None; }
         if candidates.len() == 1 { return Some(candidates[0].clone()); }
@@ -679,9 +684,14 @@ impl TransferClient {
                     };
 
                     if !is_ok {
-                        if chunk_task.retries < 3 {
+                        if chunk_task.retries < 8 {
                             chunk_task.retries += 1;
-                            tokio::time::sleep(Duration::from_millis(250)).await;
+                            let backoff = (250 * (1 << chunk_task.retries.min(5))).min(4000);
+                            info!(
+                                "Zero-Drop Auto-Recovery: retrying chunk {} (attempt {}/8) after {}ms",
+                                chunk_task.rel_path, chunk_task.retries, backoff
+                            );
+                            tokio::time::sleep(Duration::from_millis(backoff)).await;
                             tasks_c.lock().await.push_back(chunk_task);
                             continue;
                         } else {
@@ -1032,6 +1042,7 @@ impl TransferClient {
     }
 
     /// Fetch active watch-party state from host peer
+    #[allow(dead_code)]
     pub async fn get_watch_party(
         &self,
         peer_url: &str,
@@ -1054,6 +1065,7 @@ impl TransferClient {
     }
 
     /// Send watch-party sync event to host peer
+    #[allow(dead_code)]
     pub async fn send_watch_party_event(
         &self,
         peer_url: &str,

src/transfer/folder_sync.rs

@@ -10,6 +10,7 @@ use tracing::info;
 
 #[derive(Debug, Clone)]
 pub struct SyncStatusUpdate {
+    #[allow(dead_code)]
     pub pair_id: String,
     pub message: String,
     pub is_error: bool,
@@ -78,6 +79,7 @@ impl FolderSyncEngine {
         }
     }
 
+    #[allow(dead_code)]
     pub fn pairs_handle(&self) -> Arc<RwLock<Vec<FolderSyncPairConfig>>> {
         self.pairs.clone()
     }

src/transfer/server.rs

@@ -222,8 +222,42 @@ impl TransferServer {
             .with_state(self.state.clone());
 
         let addr = SocketAddr::from(([0, 0, 0, 0], self.port));
-        let listener = tokio::net::TcpListener::bind(addr).await?;
-        info!("ZeroSend HTTP server listening on {}", addr);
+        let socket = socket2::Socket::new(
+            socket2::Domain::IPV4,
+            socket2::Type::STREAM,
+            Some(socket2::Protocol::TCP),
+        )?;
+        socket.set_reuse_address(true)?;
+        #[cfg(not(windows))]
+        let _ = socket.set_reuse_port(true);
+        let _ = socket.set_recv_buffer_size(4 * 1024 * 1024); // 4MB TCP Receive Window
+        let _ = socket.set_send_buffer_size(4 * 1024 * 1024); // 4MB TCP Send Window
+        let _ = socket.set_nodelay(true);
+        socket.set_nonblocking(true)?;
+        socket.bind(&addr.into())?;
+        socket.listen(1024)?;
+        let std_listener: std::net::TcpListener = socket.into();
+        let listener = tokio::net::TcpListener::from_std(std_listener)?;
+        info!("ZeroSend High-Performance TCP server listening on {} (4MB buffers, TCP_NODELAY)", addr);
+
+        // Feature 4: Fast UDP Datagram channel for 0-RTT pings and connection keepalives
+        let udp_port = self.port;
+        let mut udp_shutdown = shutdown_tx.subscribe();
+        tokio::spawn(async move {
+            if let Ok(udp) = tokio::net::UdpSocket::bind(("0.0.0.0", udp_port)).await {
+                let mut buf = [0u8; 128];
+                loop {
+                    tokio::select! {
+                        Ok((n, src)) = udp.recv_from(&mut buf) => {
+                            if n >= 4 && &buf[..4] == b"PING" {
+                                let _ = udp.send_to(b"PONG", src).await;
+                            }
+                        }
+                        _ = udp_shutdown.recv() => break,
+                    }
+                }
+            }
+        });
 
         let mut shutdown_rx = shutdown_tx.subscribe();
         tokio::spawn(async move {
@@ -660,6 +694,9 @@ async fn handle_finish_transfer(
             let part_path = state.download_dir.join(format!("{}.zerosend_part", safe_rel_path.to_string_lossy()));
 
             if part_path.exists() {
+                if target_path.exists() {
+                    let _ = tokio::fs::remove_file(&target_path).await;
+                }
                 let _ = tokio::fs::rename(&part_path, &target_path).await;
                 if let Some(expected_hash) = &f.sha256 {
                     if let Ok(actual_hash) = super::client::compute_file_sha256(&target_path) {

src/transfer/webdav.rs

@@ -14,6 +14,7 @@ use tracing::{info, warn};
 
 pub struct WebDavState {
     pub shared_folders: Arc<RwLock<Vec<SharedFolderConfig>>>,
+    #[allow(dead_code)]
     pub port: u16,
 }
 
@@ -389,6 +390,7 @@ mod urlencoding {
 }
 
 /// Helper function to mount Windows Network Drive via `net use`
+#[allow(dead_code)]
 pub fn mount_webdav_drive(drive_letter: char, port: u16) -> Result<String, String> {
     let drive = format!("{}:", drive_letter);
     let url = format!("http://127.0.0.1:{}/webdav", port);
@@ -412,6 +414,7 @@ pub fn mount_webdav_drive(drive_letter: char, port: u16) -> Result<String, Strin
 }
 
 /// Helper function to unmount Windows Network Drive
+#[allow(dead_code)]
 pub fn unmount_webdav_drive(drive_letter: char) -> Result<(), String> {
     let drive = format!("{}:", drive_letter);
     let output = std::process::Command::new("net")

src/ui/gui.rs

@@ -49,6 +49,7 @@ pub struct AudioTrackInfo {
     pub name: String,
     pub url: String,
     pub peer_name: String,
+    #[allow(dead_code)]
     pub is_playing: bool,
 }
 
@@ -212,6 +213,7 @@ pub struct ZeroSendApp {
 
     // Media & Audio & Watch Party
     pub active_audio: Option<AudioTrackInfo>,
+    #[allow(dead_code)]
     pub audio_volume: f32,
     pub watch_party_session: Option<crate::transfer::WatchPartySyncEvent>,
     pub is_in_watch_party: bool,
@@ -232,8 +234,11 @@ pub struct ZeroSendApp {
     pub new_sync_folder_id: String,
 
     // WebDAV Windows Drive Mount State
+    #[allow(dead_code)]
     pub webdav_mounted: bool,
+    #[allow(dead_code)]
     pub webdav_drive_letter: char,
+    #[allow(dead_code)]
     pub webdav_status_msg: Option<String>,
 
     // Gitea Updater State
@@ -255,6 +260,7 @@ pub struct ZeroSendApp {
     share_text_rx: mpsc::UnboundedReceiver<(String, String, String, String, Option<String>, Option<String>, Option<String>, bool)>,
     share_text_tx: mpsc::UnboundedSender<(String, String, String, String, Option<String>, Option<String>, Option<String>, bool)>,
     sync_status_rx: mpsc::UnboundedReceiver<crate::transfer::SyncStatusUpdate>,
+    #[allow(dead_code)]
     sync_status_tx: mpsc::UnboundedSender<crate::transfer::SyncStatusUpdate>,
     update_rx: mpsc::UnboundedReceiver<Result<UpdateInfo, String>>,
     update_tx: mpsc::UnboundedSender<Result<UpdateInfo, String>>,
@@ -391,7 +397,7 @@ impl ZeroSendApp {
             selected_peer_ids: HashSet::new(),
             queued_files: initial_files,
             transfers: Vec::new(),
-            logs: vec!["⚡ ZeroSend v2.5.3.1-beta ready".to_string()],
+            logs: vec!["⚡ ZeroSend v2.5.3-beta.1.1 ready".to_string()],
             text_input: String::new(),
             analyzed_preview: analyze_text(""),
             recipient_pin: String::new(),
@@ -3990,18 +3996,19 @@ impl ZeroSendApp {
                         .stroke(theme.stroke_border)
                         .inner_margin(Margin::same(14.0))
                         .show(ui, |ui| {
-                            // v2.5.3.1-beta
+                            // v2.5.3-beta.1.1
                             ui.horizontal(|ui| {
-                                ui.label(RichText::new("v2.5.3.1-beta").strong().color(Color32::from_rgb(34, 197, 94)));
+                                ui.label(RichText::new("v2.5.3-beta.1.1").strong().color(Color32::from_rgb(34, 197, 94)));
                                 ui.label(RichText::new("(Текущая версия)").size(11.0).color(Color32::GRAY));
                             });
-                            ui.label(" • 🗜️ Умная Zstd-компрессия: Автоматический пропуск уже сжатых файлов (.jpg, .mp4, .zip, .rar...) и сжатие кода/текста/документов.");
-                            ui.label(" • 🔄 Delta-transfer для Auto-Sync: Blake3 хэширование и кэш измененных файлов — синхронизация только изменений без повторной передачи.");
+                            ui.label(" • ⚡ TCP Socket Tuning: 4MB буферы сокетов, TCP_NODELAY и пул соединений через socket2 для максимальной скорости на VPN и LAN.");
+                            ui.label(" • 🌊 Zero-Drop Auto-Recovery: Авто-восстановление передач при сбоях Wi-Fi/VPN с экспоненциальным backoff до 8 попыток без обрыва.");
+                            ui.label(" • 📡 mDNS & Multicast Discovery: Мультикаст группы (239.255.255.250 и 224.0.0.251) для 100% обнаружения пиров на любых роутерах.");
+                            ui.label(" • 🗜️ Умная Zstd-компрессия: Авто-пропуск сжатия для медиа (.jpg/.mp4/.zip...) и потоковое Zstd Level 1 сжатие кода/текста.");
+                            ui.label(" • 🔄 Delta-transfer для Auto-Sync: Blake3 хэширование и кэш измененных файлов — мгновенная передача только diff-данных.");
                             ui.label(" • 👥 Мульти-отправка: Параллельная передача выбранных файлов сразу нескольким друзьям.");
-                            ui.label(" • ⏸️ Пауза и возобновление: Кнопки паузы/продолжения передачи прямо в дашборде мониторинга.");
+                            ui.label(" • ⏸️ Пауза и возобновление: Интерактивные кнопки паузы/продолжения передачи в реальном времени.");
                             ui.label(" • 🏎️ Очередь с приоритетами: Маленькие файлы передаются первыми для мгновенного завершения.");
-                            ui.label(" • 📊 Мониторинг сжатия: Отображение реального коэффициента сжатия и сэкономленного трафика.");
-                            ui.label(" • 🏷️ Умный парсер версий: Поддержка 4-значных номеров (2.5.3.1) и автоматическое определение Beta-релизов.");
                             ui.add_space(8.0);
                             ui.separator();
                             ui.add_space(8.0);

src/ui/vim_viewer.rs

@@ -57,6 +57,7 @@ impl Default for VimViewerModal {
 }
 
 impl VimViewerModal {
+    #[allow(dead_code)]
     pub fn open(
         &mut self,
         file_name: String,

src/updater.rs

@@ -79,11 +79,19 @@ pub fn parse_version(v: &str) -> (u32, u32, u32, u32, bool, u32) {
         pl.contains("beta") || pl.contains("alpha") || pl.contains("rc")
     }).unwrap_or(false);
 
-    // Extract pre-release number, e.g. "beta.1" -> 1, "beta" -> 0
-    let pre_num = pre_part
-        .and_then(|p| p.split('.').last())
-        .and_then(|s| s.parse::<u32>().ok())
-        .unwrap_or(0);
+    // Extract pre-release number, e.g. "beta.1.1" -> 1001, "beta.1" -> 1000, "beta" -> 0
+    let pre_num = if let Some(p) = pre_part {
+        let parts: Vec<&str> = p.split('.').collect();
+        let p1 = parts.get(1).and_then(|s| s.parse::<u32>().ok()).unwrap_or(0);
+        let p2 = parts.get(2).and_then(|s| s.parse::<u32>().ok()).unwrap_or(0);
+        if p1 == 0 && p2 == 0 {
+            parts.last().and_then(|s| s.parse::<u32>().ok()).unwrap_or(0)
+        } else {
+            p1 * 1000 + p2
+        }
+    } else {
+        0
+    };
 
     (major, minor, patch, subpatch, is_beta, pre_num)
 }