mirror of https://github.com/telemt/telemt.git
790 lines
26 KiB
Rust
790 lines
26 KiB
Rust
//! Client Handler
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use std::future::Future;
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use std::net::{IpAddr, SocketAddr};
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use std::pin::Pin;
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use std::sync::Arc;
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use std::time::Duration;
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use tokio::io::{AsyncRead, AsyncReadExt, AsyncWrite};
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use tokio::net::TcpStream;
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use tokio::time::timeout;
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use tracing::{debug, warn};
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/// Post-handshake future (relay phase, runs outside handshake timeout)
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type PostHandshakeFuture = Pin<Box<dyn Future<Output = Result<()>> + Send>>;
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/// Result of the handshake phase
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enum HandshakeOutcome {
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/// Handshake succeeded, relay work to do (outside timeout)
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NeedsRelay(PostHandshakeFuture),
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/// Already fully handled (bad client masking, etc.)
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Handled,
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}
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use crate::config::ProxyConfig;
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use crate::crypto::SecureRandom;
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use crate::error::{HandshakeResult, ProxyError, Result};
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use crate::ip_tracker::UserIpTracker;
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use crate::protocol::constants::*;
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use crate::protocol::tls;
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use crate::stats::beobachten::BeobachtenStore;
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use crate::stats::{ReplayChecker, Stats};
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use crate::stream::{BufferPool, CryptoReader, CryptoWriter};
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use crate::transport::middle_proxy::MePool;
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use crate::transport::{UpstreamManager, configure_client_socket, parse_proxy_protocol};
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use crate::transport::socket::normalize_ip;
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use crate::tls_front::TlsFrontCache;
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use crate::proxy::direct_relay::handle_via_direct;
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use crate::proxy::handshake::{HandshakeSuccess, handle_mtproto_handshake, handle_tls_handshake};
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use crate::proxy::masking::handle_bad_client;
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use crate::proxy::middle_relay::handle_via_middle_proxy;
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fn beobachten_ttl(config: &ProxyConfig) -> Duration {
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Duration::from_secs(config.general.beobachten_minutes.saturating_mul(60))
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}
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fn record_beobachten_class(
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beobachten: &BeobachtenStore,
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config: &ProxyConfig,
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peer_ip: IpAddr,
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class: &str,
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) {
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if !config.general.beobachten {
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return;
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}
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beobachten.record(class, peer_ip, beobachten_ttl(config));
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}
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fn record_handshake_failure_class(
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beobachten: &BeobachtenStore,
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config: &ProxyConfig,
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peer_ip: IpAddr,
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error: &ProxyError,
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) {
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let class = if error.to_string().contains("expected 64 bytes, got 0") {
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"expected_64_got_0"
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} else {
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"other"
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};
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record_beobachten_class(beobachten, config, peer_ip, class);
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}
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pub async fn handle_client_stream<S>(
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mut stream: S,
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peer: SocketAddr,
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config: Arc<ProxyConfig>,
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stats: Arc<Stats>,
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upstream_manager: Arc<UpstreamManager>,
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replay_checker: Arc<ReplayChecker>,
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buffer_pool: Arc<BufferPool>,
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rng: Arc<SecureRandom>,
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me_pool: Option<Arc<MePool>>,
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tls_cache: Option<Arc<TlsFrontCache>>,
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ip_tracker: Arc<UserIpTracker>,
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beobachten: Arc<BeobachtenStore>,
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proxy_protocol_enabled: bool,
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) -> Result<()>
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where
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S: AsyncRead + AsyncWrite + Unpin + Send + 'static,
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{
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stats.increment_connects_all();
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let mut real_peer = normalize_ip(peer);
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// For non-TCP streams, use a synthetic local address; may be overridden by PROXY protocol dst
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let mut local_addr: SocketAddr = format!("0.0.0.0:{}", config.server.port)
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.parse()
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.unwrap_or_else(|_| "0.0.0.0:443".parse().unwrap());
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if proxy_protocol_enabled {
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match parse_proxy_protocol(&mut stream, peer).await {
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Ok(info) => {
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debug!(
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peer = %peer,
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client = %info.src_addr,
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version = info.version,
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"PROXY protocol header parsed"
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);
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real_peer = normalize_ip(info.src_addr);
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if let Some(dst) = info.dst_addr {
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local_addr = dst;
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}
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}
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Err(e) => {
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stats.increment_connects_bad();
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warn!(peer = %peer, error = %e, "Invalid PROXY protocol header");
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record_beobachten_class(&beobachten, &config, peer.ip(), "other");
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return Err(e);
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}
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}
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}
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debug!(peer = %real_peer, "New connection (generic stream)");
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let handshake_timeout = Duration::from_secs(config.timeouts.client_handshake);
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let stats_for_timeout = stats.clone();
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let config_for_timeout = config.clone();
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let beobachten_for_timeout = beobachten.clone();
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let peer_for_timeout = real_peer.ip();
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// Phase 1: handshake (with timeout)
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let outcome = match timeout(handshake_timeout, async {
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let mut first_bytes = [0u8; 5];
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stream.read_exact(&mut first_bytes).await?;
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let is_tls = tls::is_tls_handshake(&first_bytes[..3]);
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debug!(peer = %real_peer, is_tls = is_tls, "Handshake type detected");
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if is_tls {
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let tls_len = u16::from_be_bytes([first_bytes[3], first_bytes[4]]) as usize;
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if tls_len < 512 {
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debug!(peer = %real_peer, tls_len = tls_len, "TLS handshake too short");
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stats.increment_connects_bad();
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let (reader, writer) = tokio::io::split(stream);
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handle_bad_client(
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reader,
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writer,
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&first_bytes,
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real_peer,
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local_addr,
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&config,
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&beobachten,
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)
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.await;
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return Ok(HandshakeOutcome::Handled);
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}
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let mut handshake = vec![0u8; 5 + tls_len];
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handshake[..5].copy_from_slice(&first_bytes);
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stream.read_exact(&mut handshake[5..]).await?;
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let (read_half, write_half) = tokio::io::split(stream);
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let (mut tls_reader, tls_writer, _tls_user) = match handle_tls_handshake(
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&handshake, read_half, write_half, real_peer,
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&config, &replay_checker, &rng, tls_cache.clone(),
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).await {
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HandshakeResult::Success(result) => result,
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HandshakeResult::BadClient { reader, writer } => {
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stats.increment_connects_bad();
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handle_bad_client(
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reader,
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writer,
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&handshake,
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real_peer,
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local_addr,
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&config,
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&beobachten,
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)
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.await;
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return Ok(HandshakeOutcome::Handled);
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}
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HandshakeResult::Error(e) => return Err(e),
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};
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debug!(peer = %peer, "Reading MTProto handshake through TLS");
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let mtproto_data = tls_reader.read_exact(HANDSHAKE_LEN).await?;
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let mtproto_handshake: [u8; HANDSHAKE_LEN] = mtproto_data[..].try_into()
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.map_err(|_| ProxyError::InvalidHandshake("Short MTProto handshake".into()))?;
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let (crypto_reader, crypto_writer, success) = match handle_mtproto_handshake(
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&mtproto_handshake, tls_reader, tls_writer, real_peer,
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&config, &replay_checker, true,
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).await {
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HandshakeResult::Success(result) => result,
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HandshakeResult::BadClient { reader: _, writer: _ } => {
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stats.increment_connects_bad();
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debug!(peer = %peer, "Valid TLS but invalid MTProto handshake");
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return Ok(HandshakeOutcome::Handled);
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}
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HandshakeResult::Error(e) => return Err(e),
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};
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Ok(HandshakeOutcome::NeedsRelay(Box::pin(
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RunningClientHandler::handle_authenticated_static(
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crypto_reader, crypto_writer, success,
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upstream_manager, stats, config, buffer_pool, rng, me_pool,
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local_addr, real_peer, ip_tracker.clone(),
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),
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)))
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} else {
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if !config.general.modes.classic && !config.general.modes.secure {
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debug!(peer = %real_peer, "Non-TLS modes disabled");
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stats.increment_connects_bad();
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let (reader, writer) = tokio::io::split(stream);
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handle_bad_client(
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reader,
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writer,
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&first_bytes,
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real_peer,
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local_addr,
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&config,
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&beobachten,
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)
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.await;
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return Ok(HandshakeOutcome::Handled);
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}
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let mut handshake = [0u8; HANDSHAKE_LEN];
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handshake[..5].copy_from_slice(&first_bytes);
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stream.read_exact(&mut handshake[5..]).await?;
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let (read_half, write_half) = tokio::io::split(stream);
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let (crypto_reader, crypto_writer, success) = match handle_mtproto_handshake(
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&handshake, read_half, write_half, real_peer,
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&config, &replay_checker, false,
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).await {
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HandshakeResult::Success(result) => result,
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HandshakeResult::BadClient { reader, writer } => {
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stats.increment_connects_bad();
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handle_bad_client(
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reader,
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writer,
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&handshake,
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real_peer,
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local_addr,
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&config,
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&beobachten,
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)
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.await;
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return Ok(HandshakeOutcome::Handled);
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}
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HandshakeResult::Error(e) => return Err(e),
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};
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Ok(HandshakeOutcome::NeedsRelay(Box::pin(
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RunningClientHandler::handle_authenticated_static(
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crypto_reader,
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crypto_writer,
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success,
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upstream_manager,
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stats,
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config,
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buffer_pool,
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rng,
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me_pool,
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local_addr,
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real_peer,
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ip_tracker.clone(),
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)
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)))
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}
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}).await {
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Ok(Ok(outcome)) => outcome,
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Ok(Err(e)) => {
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debug!(peer = %peer, error = %e, "Handshake failed");
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record_handshake_failure_class(
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&beobachten_for_timeout,
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&config_for_timeout,
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peer_for_timeout,
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&e,
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);
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return Err(e);
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}
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Err(_) => {
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stats_for_timeout.increment_handshake_timeouts();
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debug!(peer = %peer, "Handshake timeout");
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record_beobachten_class(
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&beobachten_for_timeout,
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&config_for_timeout,
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peer_for_timeout,
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"other",
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);
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return Err(ProxyError::TgHandshakeTimeout);
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}
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};
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// Phase 2: relay (WITHOUT handshake timeout — relay has its own activity timeouts)
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match outcome {
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HandshakeOutcome::NeedsRelay(fut) => fut.await,
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HandshakeOutcome::Handled => Ok(()),
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}
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}
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pub struct ClientHandler;
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pub struct RunningClientHandler {
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stream: TcpStream,
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peer: SocketAddr,
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config: Arc<ProxyConfig>,
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stats: Arc<Stats>,
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replay_checker: Arc<ReplayChecker>,
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upstream_manager: Arc<UpstreamManager>,
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buffer_pool: Arc<BufferPool>,
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rng: Arc<SecureRandom>,
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me_pool: Option<Arc<MePool>>,
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tls_cache: Option<Arc<TlsFrontCache>>,
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ip_tracker: Arc<UserIpTracker>,
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beobachten: Arc<BeobachtenStore>,
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proxy_protocol_enabled: bool,
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}
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impl ClientHandler {
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pub fn new(
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stream: TcpStream,
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peer: SocketAddr,
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config: Arc<ProxyConfig>,
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stats: Arc<Stats>,
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upstream_manager: Arc<UpstreamManager>,
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replay_checker: Arc<ReplayChecker>,
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buffer_pool: Arc<BufferPool>,
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rng: Arc<SecureRandom>,
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me_pool: Option<Arc<MePool>>,
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tls_cache: Option<Arc<TlsFrontCache>>,
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ip_tracker: Arc<UserIpTracker>,
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beobachten: Arc<BeobachtenStore>,
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proxy_protocol_enabled: bool,
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) -> RunningClientHandler {
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RunningClientHandler {
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stream,
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peer,
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config,
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stats,
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replay_checker,
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upstream_manager,
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buffer_pool,
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rng,
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me_pool,
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tls_cache,
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ip_tracker,
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beobachten,
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proxy_protocol_enabled,
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}
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}
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}
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impl RunningClientHandler {
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pub async fn run(mut self) -> Result<()> {
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self.stats.increment_connects_all();
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self.peer = normalize_ip(self.peer);
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let peer = self.peer;
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let _ip_tracker = self.ip_tracker.clone();
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debug!(peer = %peer, "New connection");
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if let Err(e) = configure_client_socket(
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&self.stream,
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self.config.timeouts.client_keepalive,
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self.config.timeouts.client_ack,
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) {
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debug!(peer = %peer, error = %e, "Failed to configure client socket");
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}
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let handshake_timeout = Duration::from_secs(self.config.timeouts.client_handshake);
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let stats = self.stats.clone();
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let config_for_timeout = self.config.clone();
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let beobachten_for_timeout = self.beobachten.clone();
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let peer_for_timeout = peer.ip();
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// Phase 1: handshake (with timeout)
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let outcome = match timeout(handshake_timeout, self.do_handshake()).await {
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Ok(Ok(outcome)) => outcome,
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Ok(Err(e)) => {
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debug!(peer = %peer, error = %e, "Handshake failed");
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record_handshake_failure_class(
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&beobachten_for_timeout,
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&config_for_timeout,
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peer_for_timeout,
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&e,
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);
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return Err(e);
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}
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Err(_) => {
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stats.increment_handshake_timeouts();
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debug!(peer = %peer, "Handshake timeout");
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record_beobachten_class(
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&beobachten_for_timeout,
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&config_for_timeout,
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peer_for_timeout,
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"other",
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);
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return Err(ProxyError::TgHandshakeTimeout);
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}
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};
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// Phase 2: relay (WITHOUT handshake timeout — relay has its own activity timeouts)
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match outcome {
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HandshakeOutcome::NeedsRelay(fut) => fut.await,
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HandshakeOutcome::Handled => Ok(()),
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}
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}
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async fn do_handshake(mut self) -> Result<HandshakeOutcome> {
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let mut local_addr = self.stream.local_addr().map_err(ProxyError::Io)?;
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if self.proxy_protocol_enabled {
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match parse_proxy_protocol(&mut self.stream, self.peer).await {
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Ok(info) => {
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debug!(
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peer = %self.peer,
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client = %info.src_addr,
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version = info.version,
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"PROXY protocol header parsed"
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);
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self.peer = normalize_ip(info.src_addr);
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if let Some(dst) = info.dst_addr {
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local_addr = dst;
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}
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}
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Err(e) => {
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self.stats.increment_connects_bad();
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warn!(peer = %self.peer, error = %e, "Invalid PROXY protocol header");
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record_beobachten_class(
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&self.beobachten,
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&self.config,
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self.peer.ip(),
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"other",
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);
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return Err(e);
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}
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}
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}
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let mut first_bytes = [0u8; 5];
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self.stream.read_exact(&mut first_bytes).await?;
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let is_tls = tls::is_tls_handshake(&first_bytes[..3]);
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let peer = self.peer;
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let _ip_tracker = self.ip_tracker.clone();
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debug!(peer = %peer, is_tls = is_tls, "Handshake type detected");
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if is_tls {
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self.handle_tls_client(first_bytes, local_addr).await
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} else {
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self.handle_direct_client(first_bytes, local_addr).await
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}
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}
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async fn handle_tls_client(mut self, first_bytes: [u8; 5], local_addr: SocketAddr) -> Result<HandshakeOutcome> {
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let peer = self.peer;
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let _ip_tracker = self.ip_tracker.clone();
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let tls_len = u16::from_be_bytes([first_bytes[3], first_bytes[4]]) as usize;
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debug!(peer = %peer, tls_len = tls_len, "Reading TLS handshake");
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if tls_len < 512 {
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debug!(peer = %peer, tls_len = tls_len, "TLS handshake too short");
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self.stats.increment_connects_bad();
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let (reader, writer) = self.stream.into_split();
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handle_bad_client(
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reader,
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writer,
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&first_bytes,
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peer,
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local_addr,
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&self.config,
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&self.beobachten,
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)
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.await;
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return Ok(HandshakeOutcome::Handled);
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}
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let mut handshake = vec![0u8; 5 + tls_len];
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handshake[..5].copy_from_slice(&first_bytes);
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self.stream.read_exact(&mut handshake[5..]).await?;
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let config = self.config.clone();
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let replay_checker = self.replay_checker.clone();
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let stats = self.stats.clone();
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let buffer_pool = self.buffer_pool.clone();
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let (read_half, write_half) = self.stream.into_split();
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let (mut tls_reader, tls_writer, _tls_user) = match handle_tls_handshake(
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&handshake,
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read_half,
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write_half,
|
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peer,
|
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&config,
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&replay_checker,
|
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&self.rng,
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self.tls_cache.clone(),
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)
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.await
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{
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HandshakeResult::Success(result) => result,
|
|
HandshakeResult::BadClient { reader, writer } => {
|
|
stats.increment_connects_bad();
|
|
handle_bad_client(
|
|
reader,
|
|
writer,
|
|
&handshake,
|
|
peer,
|
|
local_addr,
|
|
&config,
|
|
&self.beobachten,
|
|
)
|
|
.await;
|
|
return Ok(HandshakeOutcome::Handled);
|
|
}
|
|
HandshakeResult::Error(e) => return Err(e),
|
|
};
|
|
|
|
debug!(peer = %peer, "Reading MTProto handshake through TLS");
|
|
let mtproto_data = tls_reader.read_exact(HANDSHAKE_LEN).await?;
|
|
let mtproto_handshake: [u8; HANDSHAKE_LEN] = mtproto_data[..]
|
|
.try_into()
|
|
.map_err(|_| ProxyError::InvalidHandshake("Short MTProto handshake".into()))?;
|
|
|
|
let (crypto_reader, crypto_writer, success) = match handle_mtproto_handshake(
|
|
&mtproto_handshake,
|
|
tls_reader,
|
|
tls_writer,
|
|
peer,
|
|
&config,
|
|
&replay_checker,
|
|
true,
|
|
)
|
|
.await
|
|
{
|
|
HandshakeResult::Success(result) => result,
|
|
HandshakeResult::BadClient {
|
|
reader: _,
|
|
writer: _,
|
|
} => {
|
|
stats.increment_connects_bad();
|
|
debug!(peer = %peer, "Valid TLS but invalid MTProto handshake");
|
|
return Ok(HandshakeOutcome::Handled);
|
|
}
|
|
HandshakeResult::Error(e) => return Err(e),
|
|
};
|
|
|
|
Ok(HandshakeOutcome::NeedsRelay(Box::pin(
|
|
Self::handle_authenticated_static(
|
|
crypto_reader,
|
|
crypto_writer,
|
|
success,
|
|
self.upstream_manager,
|
|
self.stats,
|
|
self.config,
|
|
buffer_pool,
|
|
self.rng,
|
|
self.me_pool,
|
|
local_addr,
|
|
peer,
|
|
self.ip_tracker,
|
|
),
|
|
)))
|
|
}
|
|
|
|
async fn handle_direct_client(mut self, first_bytes: [u8; 5], local_addr: SocketAddr) -> Result<HandshakeOutcome> {
|
|
let peer = self.peer;
|
|
let _ip_tracker = self.ip_tracker.clone();
|
|
|
|
if !self.config.general.modes.classic && !self.config.general.modes.secure {
|
|
debug!(peer = %peer, "Non-TLS modes disabled");
|
|
self.stats.increment_connects_bad();
|
|
let (reader, writer) = self.stream.into_split();
|
|
handle_bad_client(
|
|
reader,
|
|
writer,
|
|
&first_bytes,
|
|
peer,
|
|
local_addr,
|
|
&self.config,
|
|
&self.beobachten,
|
|
)
|
|
.await;
|
|
return Ok(HandshakeOutcome::Handled);
|
|
}
|
|
|
|
let mut handshake = [0u8; HANDSHAKE_LEN];
|
|
handshake[..5].copy_from_slice(&first_bytes);
|
|
self.stream.read_exact(&mut handshake[5..]).await?;
|
|
|
|
let config = self.config.clone();
|
|
let replay_checker = self.replay_checker.clone();
|
|
let stats = self.stats.clone();
|
|
let buffer_pool = self.buffer_pool.clone();
|
|
|
|
let (read_half, write_half) = self.stream.into_split();
|
|
|
|
let (crypto_reader, crypto_writer, success) = match handle_mtproto_handshake(
|
|
&handshake,
|
|
read_half,
|
|
write_half,
|
|
peer,
|
|
&config,
|
|
&replay_checker,
|
|
false,
|
|
)
|
|
.await
|
|
{
|
|
HandshakeResult::Success(result) => result,
|
|
HandshakeResult::BadClient { reader, writer } => {
|
|
stats.increment_connects_bad();
|
|
handle_bad_client(
|
|
reader,
|
|
writer,
|
|
&handshake,
|
|
peer,
|
|
local_addr,
|
|
&config,
|
|
&self.beobachten,
|
|
)
|
|
.await;
|
|
return Ok(HandshakeOutcome::Handled);
|
|
}
|
|
HandshakeResult::Error(e) => return Err(e),
|
|
};
|
|
|
|
Ok(HandshakeOutcome::NeedsRelay(Box::pin(
|
|
Self::handle_authenticated_static(
|
|
crypto_reader,
|
|
crypto_writer,
|
|
success,
|
|
self.upstream_manager,
|
|
self.stats,
|
|
self.config,
|
|
buffer_pool,
|
|
self.rng,
|
|
self.me_pool,
|
|
local_addr,
|
|
peer,
|
|
self.ip_tracker,
|
|
),
|
|
)))
|
|
}
|
|
|
|
/// Main dispatch after successful handshake.
|
|
/// Two modes:
|
|
/// - Direct: TCP relay to TG DC (existing behavior)
|
|
/// - Middle Proxy: RPC multiplex through ME pool (new — supports CDN DCs)
|
|
async fn handle_authenticated_static<R, W>(
|
|
client_reader: CryptoReader<R>,
|
|
client_writer: CryptoWriter<W>,
|
|
success: HandshakeSuccess,
|
|
upstream_manager: Arc<UpstreamManager>,
|
|
stats: Arc<Stats>,
|
|
config: Arc<ProxyConfig>,
|
|
buffer_pool: Arc<BufferPool>,
|
|
rng: Arc<SecureRandom>,
|
|
me_pool: Option<Arc<MePool>>,
|
|
local_addr: SocketAddr,
|
|
peer_addr: SocketAddr,
|
|
ip_tracker: Arc<UserIpTracker>,
|
|
) -> Result<()>
|
|
where
|
|
R: AsyncRead + Unpin + Send + 'static,
|
|
W: AsyncWrite + Unpin + Send + 'static,
|
|
{
|
|
let user = success.user.clone();
|
|
|
|
if let Err(e) = Self::check_user_limits_static(&user, &config, &stats, peer_addr, &ip_tracker).await {
|
|
warn!(user = %user, error = %e, "User limit exceeded");
|
|
return Err(e);
|
|
}
|
|
|
|
let relay_result = if config.general.use_middle_proxy {
|
|
if let Some(ref pool) = me_pool {
|
|
handle_via_middle_proxy(
|
|
client_reader,
|
|
client_writer,
|
|
success,
|
|
pool.clone(),
|
|
stats,
|
|
config,
|
|
buffer_pool,
|
|
local_addr,
|
|
rng,
|
|
)
|
|
.await
|
|
} else {
|
|
warn!("use_middle_proxy=true but MePool not initialized, falling back to direct");
|
|
handle_via_direct(
|
|
client_reader,
|
|
client_writer,
|
|
success,
|
|
upstream_manager,
|
|
stats,
|
|
config,
|
|
buffer_pool,
|
|
rng,
|
|
)
|
|
.await
|
|
}
|
|
} else {
|
|
// Direct mode (original behavior)
|
|
handle_via_direct(
|
|
client_reader,
|
|
client_writer,
|
|
success,
|
|
upstream_manager,
|
|
stats,
|
|
config,
|
|
buffer_pool,
|
|
rng,
|
|
)
|
|
.await
|
|
};
|
|
|
|
ip_tracker.remove_ip(&user, peer_addr.ip()).await;
|
|
relay_result
|
|
}
|
|
|
|
async fn check_user_limits_static(
|
|
user: &str,
|
|
config: &ProxyConfig,
|
|
stats: &Stats,
|
|
peer_addr: SocketAddr,
|
|
ip_tracker: &UserIpTracker,
|
|
) -> Result<()> {
|
|
if let Some(expiration) = config.access.user_expirations.get(user)
|
|
&& chrono::Utc::now() > *expiration
|
|
{
|
|
return Err(ProxyError::UserExpired {
|
|
user: user.to_string(),
|
|
});
|
|
}
|
|
|
|
let mut ip_reserved = false;
|
|
// IP limit check
|
|
match ip_tracker.check_and_add(user, peer_addr.ip()).await {
|
|
Ok(()) => {
|
|
ip_reserved = true;
|
|
}
|
|
Err(reason) => {
|
|
warn!(
|
|
user = %user,
|
|
ip = %peer_addr.ip(),
|
|
reason = %reason,
|
|
"IP limit exceeded"
|
|
);
|
|
return Err(ProxyError::ConnectionLimitExceeded {
|
|
user: user.to_string(),
|
|
});
|
|
}
|
|
}
|
|
|
|
if let Some(limit) = config.access.user_max_tcp_conns.get(user)
|
|
&& stats.get_user_curr_connects(user) >= *limit as u64
|
|
{
|
|
if ip_reserved {
|
|
ip_tracker.remove_ip(user, peer_addr.ip()).await;
|
|
stats.increment_ip_reservation_rollback_tcp_limit_total();
|
|
}
|
|
return Err(ProxyError::ConnectionLimitExceeded {
|
|
user: user.to_string(),
|
|
});
|
|
}
|
|
|
|
if let Some(quota) = config.access.user_data_quota.get(user)
|
|
&& stats.get_user_total_octets(user) >= *quota
|
|
{
|
|
if ip_reserved {
|
|
ip_tracker.remove_ip(user, peer_addr.ip()).await;
|
|
stats.increment_ip_reservation_rollback_quota_limit_total();
|
|
}
|
|
return Err(ProxyError::DataQuotaExceeded {
|
|
user: user.to_string(),
|
|
});
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
}
|