mirror of https://github.com/ospab/ostp.git
724 lines
38 KiB
Rust
724 lines
38 KiB
Rust
use std::time::{Duration, SystemTime};
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use std::sync::atomic::Ordering;
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use portable_atomic::{AtomicU64, AtomicU8};
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use std::sync::Arc;
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use anyhow::{Context, Result};
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use bytes::Bytes;
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use ostp_core::relay::RelayMessage;
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use ostp_core::{NoiseRole, OstpEvent, PaddingStrategy, ProtocolAction, ProtocolConfig, ProtocolMachine, TrafficProfile};
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use rand::Rng;
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use tokio::net::UdpSocket;
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use tokio::sync::{mpsc, watch};
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use tokio::time::{interval, timeout, Instant};
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use crate::app::{BridgeCommand, ConnectionStatus, UiEvent};
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use crate::config::ClientConfig;
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use crate::tunnel::{ProxyEvent, ProxyToClientMsg};
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pub struct BridgeMetrics {
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pub bytes_sent: AtomicU64,
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pub bytes_recv: AtomicU64,
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pub connection_state: AtomicU8,
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}
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async fn send_datagram(socket: &UdpSocket, frame: &Bytes, turn_enabled: bool) -> std::io::Result<usize> {
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if turn_enabled {
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let mut out = bytes::BytesMut::with_capacity(4 + frame.len());
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bytes::BufMut::put_u16(&mut out, 0x4000);
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bytes::BufMut::put_u16(&mut out, frame.len() as u16);
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out.extend_from_slice(frame);
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socket.send(&out).await
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} else {
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socket.send(frame).await
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}
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}
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struct SessionState {
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socket: Arc<UdpSocket>,
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machine: ProtocolMachine,
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}
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pub struct Bridge {
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running: bool,
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pub debug: bool,
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profile: TrafficProfile,
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server_addr: String,
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local_bind_addr: String,
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proxy_addr: String,
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access_key: Bytes,
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handshake_timeout_ms: u64,
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io_timeout_ms: u64,
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pub turn_enabled: bool,
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pub turn_server: String,
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pub turn_username: String,
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pub turn_password: String,
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pub mode: String,
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pub mux_enabled: bool,
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pub mux_sessions: usize,
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metrics: Arc<BridgeMetrics>,
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sample_sent: u64,
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sample_recv: u64,
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last_rtt_ms: f64,
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last_sample_at: Instant,
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last_valid_recv: Instant,
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}
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impl Bridge {
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pub fn new(config: &ClientConfig, metrics: Arc<BridgeMetrics>) -> Result<Self> {
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Ok(Self {
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running: false,
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debug: config.debug,
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profile: TrafficProfile::JsonRpc,
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server_addr: config.ostp.server_addr.clone(),
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local_bind_addr: config.ostp.local_bind_addr.clone(),
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proxy_addr: config.local_proxy.bind_addr.clone(),
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access_key: Bytes::from(config.ostp.access_key.clone()),
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handshake_timeout_ms: config.ostp.handshake_timeout_ms,
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io_timeout_ms: config.ostp.io_timeout_ms,
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turn_enabled: config.turn.enabled,
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turn_server: config.turn.server_addr.clone(),
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turn_username: config.turn.username.clone(),
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turn_password: config.turn.access_key.clone(),
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mode: config.mode.clone(),
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mux_enabled: config.multiplex.enabled,
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mux_sessions: config.multiplex.sessions.max(1),
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metrics,
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sample_sent: 0,
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sample_recv: 0,
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last_rtt_ms: 0.0,
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last_sample_at: Instant::now(),
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last_valid_recv: Instant::now(),
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})
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}
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pub async fn run(
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mut self,
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tx: mpsc::Sender<UiEvent>,
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mut bridge_rx: mpsc::Receiver<BridgeCommand>,
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mut shutdown: watch::Receiver<bool>,
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mut proxy_rx: mpsc::Receiver<ProxyEvent>,
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proxy_tx: mpsc::UnboundedSender<(u16, ProxyToClientMsg)>,
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) -> Result<()> {
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let mut metrics_tick = interval(Duration::from_millis(500));
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let mut keepalive_tick = tokio::time::interval(Duration::from_secs(5));
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let mut retransmit_tick = tokio::time::interval(Duration::from_millis(50));
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let init_msg = if self.mode == "tun" {
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"Bridge initialized (TUN mode)".to_string()
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} else {
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"Bridge initialized (proxy mode)".to_string()
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};
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tx.send(UiEvent::Log(init_msg)).await.ok();
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let mut sessions_opt: Option<Vec<SessionState>> = None;
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let mut udp_rx_opt: Option<mpsc::Receiver<(usize, Bytes)>> = None;
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let mut _proxy_guard: Option<crate::sysproxy::WindowsProxyGuard> = None;
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let mut stream_map: std::collections::HashMap<u16, usize> = std::collections::HashMap::new();
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loop {
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tokio::select! {
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biased;
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_ = shutdown.changed() => {
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if *shutdown.borrow() {
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self.running = false;
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self.metrics.connection_state.store(0, Ordering::Relaxed);
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_proxy_guard = None;
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break;
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}
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}
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udp_msg = async {
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match udp_rx_opt.as_mut() {
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Some(rx) => rx.recv().await,
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None => std::future::pending().await,
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}
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}, if self.running => {
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match udp_msg {
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Some((session_index, inbound)) => {
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self.metrics.bytes_recv.fetch_add(inbound.len() as u64, Ordering::Relaxed);
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self.last_valid_recv = Instant::now();
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if let Some(sessions) = sessions_opt.as_mut() {
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if session_index < sessions.len() {
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let session = &mut sessions[session_index];
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let initial_action = match session.machine.on_event(OstpEvent::Inbound(inbound)) {
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Ok(a) => a,
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Err(e) => {
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let _ = tx.send(UiEvent::Log(format!("Protocol decrypt error: {e}"))).await;
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tracing::warn!("Inbound protocol error (session {}): {}", session_index, e);
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continue;
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}
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};
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let mut actions_queue = std::collections::VecDeque::new();
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actions_queue.push_back(initial_action);
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while let Some(current_action) = actions_queue.pop_front() {
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match current_action {
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ProtocolAction::Multiple(nested) => {
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for a in nested {
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actions_queue.push_back(a);
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}
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}
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ProtocolAction::DeliverApp(stream_id, dec_payload) => {
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match RelayMessage::decode(&dec_payload) {
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Ok(relay_msg) => {
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match relay_msg {
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RelayMessage::ConnectOk => {
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let _ = tx.send(UiEvent::Log(format!("Relay CONNECT OK stream_id={stream_id}"))).await;
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let _ = proxy_tx.send((stream_id, ProxyToClientMsg::ConnectOk));
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}
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RelayMessage::Data(data) => {
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let _ = proxy_tx.send((stream_id, ProxyToClientMsg::Data(Bytes::from(data))));
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}
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RelayMessage::Close => {
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let _ = proxy_tx.send((stream_id, ProxyToClientMsg::Close));
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}
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RelayMessage::Error(msg) => {
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let _ = tx.send(UiEvent::Log(format!("Relay error for stream {stream_id}: {msg}"))).await;
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let _ = proxy_tx.send((stream_id, ProxyToClientMsg::Error(msg)));
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}
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RelayMessage::Pong(ts) => {
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let now = SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap().as_millis() as u64;
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self.last_rtt_ms = now.saturating_sub(ts) as f64;
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}
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RelayMessage::KeepAlive | RelayMessage::Ping(_) | RelayMessage::Connect(_) => {}
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}
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}
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Err(err) => {
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let _ = tx.send(UiEvent::Log(format!("Relay decode error for stream {stream_id}: {err}"))).await;
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let _ = proxy_tx.send((stream_id, ProxyToClientMsg::Error("relay decode failed".to_string())));
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}
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}
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}
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ProtocolAction::SendDatagram(frame) => {
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let _ = send_datagram(&session.socket, &frame, self.turn_enabled).await;
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self.metrics.bytes_sent.fetch_add(frame.len() as u64, Ordering::Relaxed);
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}
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_ => {}
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}
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}
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}
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}
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}
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None => {
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let _ = tx.send(UiEvent::Log("UDP channel closed, resetting connection".to_string())).await;
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self.running = false;
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crate::sysproxy::disable_windows_proxy();
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sessions_opt = None;
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udp_rx_opt = None;
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stream_map.clear();
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self.reset_proxy_streams(&tx, &proxy_tx, "udp reader closed");
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let _ = tx.send(UiEvent::TunnelStopped).await;
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}
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}
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}
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cmd = bridge_rx.recv() => {
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match cmd {
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Some(BridgeCommand::ToggleTunnel) => {
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if self.running {
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self.running = false;
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self.metrics.connection_state.store(0, Ordering::Relaxed);
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_proxy_guard = None;
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sessions_opt = None;
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udp_rx_opt = None;
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stream_map.clear();
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self.reset_proxy_streams(&tx, &proxy_tx, "manual stop");
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tx.send(UiEvent::TunnelStopped).await.ok();
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let stop_msg = if self.mode == "tun" { "TUN tunnel stopped" } else { "Bridge stopped" };
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tx.send(UiEvent::Log(stop_msg.to_string())).await.ok();
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} else {
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tx.send(UiEvent::Log("Connecting to remote server...".to_string())).await.ok();
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tx.send(UiEvent::Metrics { status: ConnectionStatus::Handshaking, rtt_ms: 0.0, throughput_bps: 0 }).await.ok();
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self.metrics.connection_state.store(1, Ordering::Relaxed);
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let session_count = if self.mux_enabled { self.mux_sessions.max(1) } else { 1 };
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let (udp_tx, udp_rx) = mpsc::channel(100000); // Increased for high-speed traffic stability
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let mut sessions = Vec::with_capacity(session_count);
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let mut rtt_sum = 0.0;
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let mut handshake_error = None;
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for idx in 0..session_count {
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let session_id: u32 = rand::thread_rng().gen();
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match self.perform_handshake_with_id(&tx, session_id).await {
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Ok((sock, mach, rtt)) => {
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let socket = Arc::new(sock);
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let socket_clone = socket.clone();
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let udp_tx_clone = udp_tx.clone();
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let is_turn = self.turn_enabled;
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tokio::spawn(async move {
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let mut buf = vec![0_u8; 65535];
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loop {
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match socket_clone.recv(&mut buf).await {
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Ok(n) => {
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let inbound = if is_turn && n >= 4 && buf[0] == 0x40 && buf[1] == 0x00 {
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let len = u16::from_be_bytes([buf[2], buf[3]]) as usize;
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if 4 + len <= n {
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Bytes::copy_from_slice(&buf[4..4+len])
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} else {
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Bytes::copy_from_slice(&buf[..n])
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}
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} else {
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Bytes::copy_from_slice(&buf[..n])
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};
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if udp_tx_clone.send((idx, inbound)).await.is_err() {
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break;
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}
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}
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Err(_) => {
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break;
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}
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}
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}
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});
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sessions.push(SessionState { socket, machine: mach });
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rtt_sum += rtt;
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}
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Err(err) => {
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handshake_error = Some(err);
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break;
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}
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}
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}
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if let Some(err) = handshake_error {
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_proxy_guard = None;
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tx.send(UiEvent::Log(format!("Connection failed: {err}"))).await.ok();
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tx.send(UiEvent::TunnelStopped).await.ok();
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self.metrics.connection_state.store(0, Ordering::Relaxed);
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continue;
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}
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udp_rx_opt = Some(udp_rx);
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sessions_opt = Some(sessions);
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self.last_rtt_ms = rtt_sum / session_count as f64;
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self.running = true;
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self.last_sample_at = Instant::now();
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self.last_valid_recv = Instant::now();
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let sys_proxy_addr = self.proxy_addr.replace("0.0.0.0:", "127.0.0.1:");
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_proxy_guard = Some(crate::sysproxy::WindowsProxyGuard::enable(&sys_proxy_addr));
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tx.send(UiEvent::Metrics {
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status: ConnectionStatus::Established,
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rtt_ms: self.last_rtt_ms,
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throughput_bps: 0,
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}).await.ok();
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self.metrics.connection_state.store(2, Ordering::Relaxed);
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let start_msg = if self.mode == "tun" { "TUN tunnel established" } else { "Connection established" };
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tx.send(UiEvent::Log(start_msg.to_string())).await.ok();
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}
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}
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Some(BridgeCommand::NextProfile) => {
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self.profile = next_profile(self.profile);
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tx.send(UiEvent::ProfileChanged(self.profile)).await.ok();
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tx.send(UiEvent::Log(format!("Obfuscation profile switched to {:?}", self.profile))).await.ok();
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}
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Some(BridgeCommand::ReloadConfig) => {
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match ClientConfig::reload_from_json_near_binary() {
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Ok(cfg) => {
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self.apply_runtime_config(&cfg);
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tx.send(UiEvent::Log("Runtime config reloaded".to_string())).await.ok();
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if self.running {
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self.running = false;
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self.metrics.connection_state.store(0, Ordering::Relaxed);
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_proxy_guard = None;
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sessions_opt = None;
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stream_map.clear();
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self.reset_proxy_streams(&tx, &proxy_tx, "config reload");
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// User logic handles UI restart
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let _ = tx.send(UiEvent::TunnelStopped).await;
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}
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}
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Err(err) => {
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let _ = tx.send(UiEvent::Log(format!("Config reload failed: {err}"))).await;
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}
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}
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}
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Some(BridgeCommand::Shutdown) | None => {
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self.running = false;
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_proxy_guard = None;
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break;
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}
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}
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}
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_ = metrics_tick.tick() => {
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if self.running {
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self.emit_metrics(&tx).await;
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}
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}
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_ = keepalive_tick.tick() => {
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if self.running {
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// 1. Connection Liveness Check
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if self.last_valid_recv.elapsed().as_secs() > 60 {
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let _ = tx.send(UiEvent::Log("Connection lost (timeout). Reconnecting...".into())).await;
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self.running = false;
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_proxy_guard = None;
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sessions_opt = None;
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stream_map.clear();
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self.reset_proxy_streams(&tx, &proxy_tx, "keepalive timeout");
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let _ = tx.send(UiEvent::TunnelStopped).await;
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self.metrics.connection_state.store(0, Ordering::Relaxed);
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continue;
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}
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// 2. Active Keep-Alive / Heartbeat
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if let Some(sessions) = sessions_opt.as_mut() {
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for session in sessions.iter_mut() {
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// Send Ping (Internal RTT Metric)
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let ts = SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap().as_millis() as u64;
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let ping_payload = Bytes::from(RelayMessage::Ping(ts).encode());
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if let Ok(ProtocolAction::SendDatagram(frame)) = session.machine.on_event(OstpEvent::Outbound(0, ping_payload)) {
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// Must go through send_datagram() for TURN-mode wrapping;
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// raw socket.send() bypasses the ChannelData header and breaks RTT in TURN.
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let _ = send_datagram(&session.socket, &frame, self.turn_enabled).await;
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self.metrics.bytes_sent.fetch_add(frame.len() as u64, Ordering::Relaxed);
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}
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// Send Relay KeepAlive (Force NAT/Server Persistence)
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let ka_payload = Bytes::from(RelayMessage::KeepAlive.encode());
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if let Ok(ProtocolAction::SendDatagram(frame)) = session.machine.on_event(OstpEvent::Outbound(0, ka_payload)) {
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let _ = send_datagram(&session.socket, &frame, self.turn_enabled).await;
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self.metrics.bytes_sent.fetch_add(frame.len() as u64, Ordering::Relaxed);
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}
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}
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}
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}
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}
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_ = retransmit_tick.tick() => {
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if self.running {
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let mut fatal_err = None;
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if let Some(sessions) = sessions_opt.as_mut() {
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for session in sessions.iter_mut() {
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match session.machine.on_event(OstpEvent::Tick) {
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Ok(action) => {
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let mut queue = vec![action];
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while let Some(current_action) = queue.pop() {
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match current_action {
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ProtocolAction::Multiple(nested) => {
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for a in nested {
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queue.push(a);
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}
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}
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ProtocolAction::SendDatagram(frame) => {
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let _ = send_datagram(&session.socket, &frame, self.turn_enabled).await;
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self.metrics.bytes_sent.fetch_add(frame.len() as u64, Ordering::Relaxed);
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}
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_ => {}
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}
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}
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}
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Err(e) => {
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fatal_err = Some(e);
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break;
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}
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}
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}
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}
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|
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if let Some(e) = fatal_err {
|
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let _ = tx.send(UiEvent::Log(format!("Protocol tick fatal error: {e}"))).await;
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self.running = false;
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_proxy_guard = None;
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sessions_opt = None;
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udp_rx_opt = None;
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stream_map.clear();
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self.reset_proxy_streams(&tx, &proxy_tx, "protocol fatal error");
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let _ = tx.send(UiEvent::TunnelStopped).await;
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self.metrics.connection_state.store(0, Ordering::Relaxed);
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}
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}
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}
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proxy_ev = proxy_rx.recv(), if self.running && sessions_opt.as_ref().map(|s| {
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// Backpressure: suspend proxy reads when ARQ window is saturated
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s.iter().all(|ses| ses.machine.in_flight_count() < 256)
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}).unwrap_or(true) => {
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if let Some(ev) = proxy_ev {
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if let Some(sessions) = sessions_opt.as_mut() {
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if sessions.is_empty() {
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if let ProxyEvent::NewStream { stream_id, .. } = ev {
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let _ = proxy_tx.send((stream_id, ProxyToClientMsg::Error("tunnel stopped".into())));
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}
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continue;
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}
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let (stream_id, relay_msg, is_close) = match ev {
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ProxyEvent::NewStream { stream_id, target } => {
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let _ = tx.send(UiEvent::Log(format!("Proxy CONNECT stream_id={stream_id} target={target}"))).await;
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(stream_id, RelayMessage::Connect(target), false)
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}
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|
ProxyEvent::Data { stream_id, payload } => (stream_id, RelayMessage::Data(payload.to_vec()), false),
|
|
ProxyEvent::Close { stream_id } => {
|
|
let _ = tx.send(UiEvent::Log(format!("Proxy CLOSE stream_id={stream_id}"))).await;
|
|
(stream_id, RelayMessage::Close, true)
|
|
}
|
|
};
|
|
let len = sessions.len();
|
|
let session_index = *stream_map.entry(stream_id).or_insert_with(|| {
|
|
// §8 FIX: Load balance multiplexed streams randomly across available connection sockets
|
|
rand::thread_rng().gen_range(0..len)
|
|
});
|
|
if is_close {
|
|
stream_map.remove(&stream_id);
|
|
}
|
|
let session = &mut sessions[session_index];
|
|
let out_payload = Bytes::from(relay_msg.encode());
|
|
match session.machine.on_event(OstpEvent::Outbound(stream_id, out_payload)) {
|
|
Ok(ProtocolAction::SendDatagram(frame)) => {
|
|
if send_datagram(&session.socket, &frame, self.turn_enabled).await.is_ok() {
|
|
self.metrics.bytes_sent.fetch_add(frame.len() as u64, Ordering::Relaxed);
|
|
if self.debug {
|
|
let _ = tx.send(UiEvent::Log(format!(
|
|
"Outbound datagram sent stream_id={stream_id} bytes={}",
|
|
frame.len()
|
|
))).await;
|
|
}
|
|
}
|
|
}
|
|
Ok(ProtocolAction::Multiple(list)) => {
|
|
let mut sent = 0usize;
|
|
for item in list {
|
|
if let ProtocolAction::SendDatagram(frame) = item {
|
|
if send_datagram(&session.socket, &frame, self.turn_enabled).await.is_ok() {
|
|
self.metrics.bytes_sent.fetch_add(frame.len() as u64, Ordering::Relaxed);
|
|
sent += 1;
|
|
}
|
|
}
|
|
}
|
|
if self.debug {
|
|
let _ = tx.send(UiEvent::Log(format!(
|
|
"Outbound datagram batch stream_id={stream_id} sent={sent}"
|
|
))).await;
|
|
}
|
|
}
|
|
Ok(ProtocolAction::Noop) => {
|
|
if self.debug {
|
|
let _ = tx.send(UiEvent::Log(format!(
|
|
"Outbound datagram noop stream_id={stream_id}"
|
|
))).await;
|
|
}
|
|
}
|
|
Ok(_) => {
|
|
if self.debug {
|
|
let _ = tx.send(UiEvent::Log(format!(
|
|
"Outbound datagram unexpected action stream_id={stream_id}"
|
|
))).await;
|
|
}
|
|
}
|
|
Err(e) => {
|
|
tracing::warn!("Protocol error packing outbound stream_id={}: {}", stream_id, e);
|
|
let _ = tx.send(UiEvent::Log(format!("Protocol error packing TCP: {e}"))).await;
|
|
}
|
|
}
|
|
} else {
|
|
// Drop it, not connected
|
|
if let ProxyEvent::NewStream { stream_id, .. } = ev {
|
|
let _ = proxy_tx.send((stream_id, ProxyToClientMsg::Error("tunnel stopped".into())));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
}
|
|
}
|
|
|
|
tx.send(UiEvent::Log("Bridge stopped".to_string())).await.ok();
|
|
Ok(())
|
|
}
|
|
|
|
fn reset_proxy_streams(
|
|
&self,
|
|
tx: &mpsc::Sender<UiEvent>,
|
|
proxy_tx: &mpsc::UnboundedSender<(u16, ProxyToClientMsg)>,
|
|
reason: &str,
|
|
) {
|
|
if proxy_tx
|
|
.send((0, ProxyToClientMsg::Close))
|
|
.is_err()
|
|
{
|
|
let tx_clone = tx.clone();
|
|
let reason_str = reason.to_string();
|
|
tokio::spawn(async move {
|
|
let _ = tx_clone
|
|
.send(UiEvent::Log(format!(
|
|
"Failed to reset local proxy streams ({reason_str})"
|
|
)))
|
|
.await;
|
|
});
|
|
}
|
|
}
|
|
|
|
async fn emit_metrics(&mut self, tx: &mpsc::Sender<UiEvent>) {
|
|
let now = Instant::now();
|
|
let elapsed = now.duration_since(self.last_sample_at).as_secs_f64().max(0.001);
|
|
self.last_sample_at = now;
|
|
|
|
let cur_sent = self.metrics.bytes_sent.load(Ordering::Relaxed);
|
|
let cur_recv = self.metrics.bytes_recv.load(Ordering::Relaxed);
|
|
|
|
let sent_delta = cur_sent.saturating_sub(self.sample_sent);
|
|
let recv_delta = cur_recv.saturating_sub(self.sample_recv);
|
|
|
|
self.sample_sent = cur_sent;
|
|
self.sample_recv = cur_recv;
|
|
|
|
let outgoing = (sent_delta as f64 / elapsed) as u64;
|
|
let incoming = (recv_delta as f64 / elapsed) as u64;
|
|
let throughput = incoming.saturating_add(outgoing);
|
|
|
|
tx.send(UiEvent::Traffic { incoming_bps: incoming, outgoing_bps: outgoing }).await.ok();
|
|
tx.send(UiEvent::Metrics {
|
|
status: ConnectionStatus::Established,
|
|
rtt_ms: self.last_rtt_ms,
|
|
throughput_bps: throughput,
|
|
}).await.ok();
|
|
}
|
|
|
|
async fn perform_handshake_with_id(
|
|
&mut self,
|
|
tx: &mpsc::Sender<UiEvent>,
|
|
session_id: u32,
|
|
) -> Result<(UdpSocket, ProtocolMachine, f64)> {
|
|
let timestamp = std::time::SystemTime::now()
|
|
.duration_since(std::time::UNIX_EPOCH)
|
|
.unwrap_or_default()
|
|
.as_secs();
|
|
|
|
let mut handshake_payload = Vec::with_capacity(8 + 4 + self.access_key.len());
|
|
handshake_payload.extend_from_slice(×tamp.to_be_bytes());
|
|
handshake_payload.extend_from_slice(&session_id.to_be_bytes());
|
|
handshake_payload.extend_from_slice(&self.access_key);
|
|
|
|
let secrets = ostp_core::crypto::derive_all_secrets(&self.access_key);
|
|
|
|
let mut machine = ProtocolMachine::new(ProtocolConfig {
|
|
role: NoiseRole::Initiator,
|
|
psk: secrets.psk,
|
|
session_id,
|
|
handshake_payload,
|
|
max_padding: 1280, // Safe MTU size to avoid UDP fragmentation on Windows/PPPoE
|
|
padding_strategy: PaddingStrategy::Profile(self.profile),
|
|
obfuscation_key: secrets.obfuscation_key,
|
|
max_reorder: 16384, // Max gap between expected and received nonce
|
|
max_reorder_buffer: 8192, // Max buffered out-of-order frames
|
|
ack_delay_ms: 5,
|
|
rto_ms: 100,
|
|
max_retries: 8,
|
|
max_sent_history: 32768, // Reduced: gap recovery handles unrecoverable frames
|
|
handshake_pad_min: secrets.handshake_pad_min,
|
|
handshake_pad_max: secrets.handshake_pad_max,
|
|
})?;
|
|
|
|
let addr = self.local_bind_addr.parse::<std::net::SocketAddr>().map_err(|e| anyhow::anyhow!("invalid bind addr: {}", e))?;
|
|
let domain = if addr.is_ipv6() { socket2::Domain::IPV6 } else { socket2::Domain::IPV4 };
|
|
let sock = socket2::Socket::new(domain, socket2::Type::DGRAM, Some(socket2::Protocol::UDP))?;
|
|
let _ = sock.set_recv_buffer_size(33554432); // 32MB
|
|
let _ = sock.set_send_buffer_size(33554432); // 32MB
|
|
let actual_recv = sock.recv_buffer_size().unwrap_or(0);
|
|
let actual_send = sock.send_buffer_size().unwrap_or(0);
|
|
tracing::info!("UDP socket buffers: recv={}KB send={}KB", actual_recv / 1024, actual_send / 1024);
|
|
sock.bind(&addr.into())?;
|
|
sock.set_nonblocking(true)?;
|
|
let socket = UdpSocket::from_std(sock.into())?;
|
|
|
|
if self.turn_enabled {
|
|
let turn_addr = if self.turn_server.contains(':') {
|
|
self.turn_server.clone()
|
|
} else {
|
|
format!("{}:3478", self.turn_server)
|
|
};
|
|
tx.send(UiEvent::Log(format!("Allocating TURN relay via {}", turn_addr))).await.ok();
|
|
|
|
match crate::turn::perform_turn_allocation(&socket, &turn_addr, &self.turn_username, &self.turn_password, &self.server_addr).await {
|
|
Ok(relay_addr) => {
|
|
tx.send(UiEvent::Log(format!("TURN relay allocated ({})", relay_addr))).await.ok();
|
|
// Re-connect the UDP socket to the TURN server so all sends go through it.
|
|
// The TURN server forwards ChannelData to the OSTP server transparently.
|
|
socket
|
|
.connect(&turn_addr)
|
|
.await
|
|
.with_context(|| format!("failed to re-connect to TURN {}", turn_addr))?;
|
|
}
|
|
Err(e) => {
|
|
tx.send(UiEvent::Log(format!("TURN allocation failed: {}. Using direct UDP.", e))).await.ok();
|
|
socket
|
|
.connect(&self.server_addr)
|
|
.await
|
|
.with_context(|| format!("failed to connect udp to {}", self.server_addr))?;
|
|
}
|
|
}
|
|
} else {
|
|
tx.send(UiEvent::Log(format!("Connected to {}", self.server_addr))).await.ok();
|
|
socket
|
|
.connect(&self.server_addr)
|
|
.await
|
|
.with_context(|| format!("failed to connect udp to {}", self.server_addr))?;
|
|
}
|
|
|
|
// Connection to remote is handled inside the TURN/direct branches above
|
|
|
|
let start = Instant::now();
|
|
let action = machine.on_event(OstpEvent::Start)?;
|
|
let handshake_frame = match action {
|
|
ProtocolAction::SendDatagram(frame) => frame,
|
|
_ => anyhow::bail!("protocol did not emit handshake datagram"),
|
|
};
|
|
send_datagram(&socket, &handshake_frame, self.turn_enabled).await?;
|
|
self.metrics.bytes_sent.fetch_add(handshake_frame.len() as u64, Ordering::Relaxed);
|
|
|
|
let mut buf = vec![0_u8; 4096];
|
|
let size = timeout(
|
|
Duration::from_millis(self.handshake_timeout_ms.max(1)),
|
|
socket.recv(&mut buf),
|
|
)
|
|
.await
|
|
.context("handshake timeout waiting server response")??;
|
|
self.metrics.bytes_recv.fetch_add(size as u64, Ordering::Relaxed);
|
|
tracing::info!("Handshake response received: {} bytes", size);
|
|
|
|
let inbound = if self.turn_enabled && size >= 4 && buf[0] == 0x40 && buf[1] == 0x00 {
|
|
let len = u16::from_be_bytes([buf[2], buf[3]]) as usize;
|
|
if 4 + len <= size {
|
|
Bytes::copy_from_slice(&buf[4..4+len])
|
|
} else {
|
|
Bytes::copy_from_slice(&buf[..size])
|
|
}
|
|
} else {
|
|
Bytes::copy_from_slice(&buf[..size])
|
|
};
|
|
machine.on_event(OstpEvent::Inbound(inbound))?;
|
|
let rtt_ms = start.elapsed().as_secs_f64() * 1000.0;
|
|
tracing::info!("Handshake complete: session={:#010x} rtt={:.1}ms", session_id, rtt_ms);
|
|
|
|
Ok((socket, machine, rtt_ms))
|
|
}
|
|
|
|
fn apply_runtime_config(&mut self, cfg: &ClientConfig) {
|
|
self.server_addr = cfg.ostp.server_addr.clone();
|
|
self.local_bind_addr = cfg.ostp.local_bind_addr.clone();
|
|
self.proxy_addr = cfg.local_proxy.bind_addr.clone();
|
|
self.access_key = Bytes::from(cfg.ostp.access_key.clone());
|
|
self.handshake_timeout_ms = cfg.ostp.handshake_timeout_ms;
|
|
self.io_timeout_ms = cfg.ostp.io_timeout_ms;
|
|
self.mode = cfg.mode.clone(); // Bug fix: mode was never updated on hot-reload
|
|
self.turn_enabled = cfg.turn.enabled;
|
|
self.turn_server = cfg.turn.server_addr.clone();
|
|
self.turn_username = cfg.turn.username.clone();
|
|
self.turn_password = cfg.turn.access_key.clone();
|
|
self.mux_enabled = cfg.multiplex.enabled;
|
|
self.mux_sessions = cfg.multiplex.sessions.max(1);
|
|
}
|
|
}
|
|
|
|
fn next_profile(current: TrafficProfile) -> TrafficProfile {
|
|
match current {
|
|
TrafficProfile::JsonRpc => TrafficProfile::HttpsBurst,
|
|
TrafficProfile::HttpsBurst => TrafficProfile::VideoStream,
|
|
TrafficProfile::VideoStream => TrafficProfile::JsonRpc,
|
|
}
|
|
}
|
|
|