mirror of
https://github.com/SagerNet/sing-quic.git
synced 2025-04-03 03:47:39 +03:00
366 lines
8.9 KiB
Go
366 lines
8.9 KiB
Go
package hysteria
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import (
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"context"
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"io"
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"math"
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"net"
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"os"
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"runtime"
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"sync"
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"github.com/sagernet/quic-go"
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"github.com/sagernet/sing-quic"
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hyCC "github.com/sagernet/sing-quic/hysteria/congestion"
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"github.com/sagernet/sing/common/baderror"
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"github.com/sagernet/sing/common/bufio"
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"github.com/sagernet/sing/common/debug"
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E "github.com/sagernet/sing/common/exceptions"
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"github.com/sagernet/sing/common/logger"
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M "github.com/sagernet/sing/common/metadata"
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N "github.com/sagernet/sing/common/network"
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aTLS "github.com/sagernet/sing/common/tls"
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)
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type ClientOptions struct {
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Context context.Context
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Dialer N.Dialer
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Logger logger.Logger
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BrutalDebug bool
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ServerAddress M.Socksaddr
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SendBPS uint64
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ReceiveBPS uint64
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XPlusPassword string
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Password string
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TLSConfig aTLS.Config
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UDPDisabled bool
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// Legacy options
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ConnReceiveWindow uint64
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StreamReceiveWindow uint64
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DisableMTUDiscovery bool
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}
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type Client struct {
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ctx context.Context
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dialer N.Dialer
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logger logger.Logger
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brutalDebug bool
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serverAddr M.Socksaddr
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sendBPS uint64
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receiveBPS uint64
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xplusPassword string
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password string
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tlsConfig aTLS.Config
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quicConfig *quic.Config
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udpDisabled bool
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connAccess sync.RWMutex
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conn *clientQUICConnection
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}
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func NewClient(options ClientOptions) (*Client, error) {
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quicConfig := &quic.Config{
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DisablePathMTUDiscovery: !(runtime.GOOS == "windows" || runtime.GOOS == "linux" || runtime.GOOS == "android" || runtime.GOOS == "darwin"),
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EnableDatagrams: true,
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InitialStreamReceiveWindow: DefaultStreamReceiveWindow,
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MaxStreamReceiveWindow: DefaultStreamReceiveWindow,
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InitialConnectionReceiveWindow: DefaultConnReceiveWindow,
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MaxConnectionReceiveWindow: DefaultConnReceiveWindow,
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MaxIdleTimeout: DefaultMaxIdleTimeout,
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KeepAlivePeriod: DefaultKeepAlivePeriod,
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}
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if options.StreamReceiveWindow != 0 {
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quicConfig.InitialStreamReceiveWindow = options.StreamReceiveWindow
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quicConfig.MaxStreamReceiveWindow = options.StreamReceiveWindow
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}
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if options.ConnReceiveWindow != 0 {
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quicConfig.InitialConnectionReceiveWindow = options.ConnReceiveWindow
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quicConfig.MaxConnectionReceiveWindow = options.ConnReceiveWindow
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}
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if options.DisableMTUDiscovery {
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quicConfig.DisablePathMTUDiscovery = true
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}
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if len(options.TLSConfig.NextProtos()) == 0 {
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options.TLSConfig.SetNextProtos([]string{DefaultALPN})
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}
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if options.SendBPS == 0 {
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return nil, E.New("missing upload speed")
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} else if options.SendBPS < MinSpeedBPS {
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return nil, E.New("invalid upload speed")
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}
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if options.ReceiveBPS == 0 {
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return nil, E.New("missing download speed")
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} else if options.ReceiveBPS < MinSpeedBPS {
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return nil, E.New("invalid download speed")
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}
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return &Client{
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ctx: options.Context,
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dialer: options.Dialer,
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logger: options.Logger,
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brutalDebug: options.BrutalDebug,
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serverAddr: options.ServerAddress,
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sendBPS: options.SendBPS,
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receiveBPS: options.ReceiveBPS,
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xplusPassword: options.XPlusPassword,
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password: options.Password,
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tlsConfig: options.TLSConfig,
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quicConfig: quicConfig,
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udpDisabled: options.UDPDisabled,
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}, nil
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}
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func (c *Client) offer(ctx context.Context) (*clientQUICConnection, error) {
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conn := c.conn
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if conn != nil && conn.active() {
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return conn, nil
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}
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c.connAccess.Lock()
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defer c.connAccess.Unlock()
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conn = c.conn
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if conn != nil && conn.active() {
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return conn, nil
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}
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conn, err := c.offerNew(ctx)
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if err != nil {
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return nil, err
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}
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return conn, nil
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}
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func (c *Client) offerNew(ctx context.Context) (*clientQUICConnection, error) {
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udpConn, err := c.dialer.DialContext(c.ctx, "udp", c.serverAddr)
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if err != nil {
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return nil, err
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}
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var packetConn net.PacketConn
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packetConn = bufio.NewUnbindPacketConn(udpConn)
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if c.xplusPassword != "" {
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packetConn = NewXPlusPacketConn(packetConn, []byte(c.xplusPassword))
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}
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quicConn, err := qtls.Dial(c.ctx, packetConn, udpConn.RemoteAddr(), c.tlsConfig, c.quicConfig)
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if err != nil {
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udpConn.Close()
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return nil, err
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}
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controlStream, err := quicConn.OpenStreamSync(ctx)
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if err != nil {
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packetConn.Close()
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return nil, err
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}
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err = WriteClientHello(controlStream, ClientHello{
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SendBPS: c.sendBPS,
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RecvBPS: c.receiveBPS,
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Auth: c.password,
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})
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if err != nil {
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packetConn.Close()
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return nil, err
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}
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serverHello, err := ReadServerHello(controlStream)
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if err != nil {
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packetConn.Close()
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return nil, err
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}
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if !serverHello.OK {
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packetConn.Close()
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return nil, E.New("remote error: ", serverHello.Message)
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}
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quicConn.SetCongestionControl(hyCC.NewBrutalSender(uint64(math.Min(float64(serverHello.RecvBPS), float64(c.sendBPS))), c.brutalDebug, c.logger))
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conn := &clientQUICConnection{
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quicConn: quicConn,
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rawConn: udpConn,
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connDone: make(chan struct{}),
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udpDisabled: !quicConn.ConnectionState().SupportsDatagrams,
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udpConnMap: make(map[uint32]*udpPacketConn),
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}
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if !c.udpDisabled {
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go c.loopMessages(conn)
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}
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c.conn = conn
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return conn, nil
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}
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func (c *Client) DialConn(ctx context.Context, destination M.Socksaddr) (net.Conn, error) {
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conn, err := c.offer(ctx)
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if err != nil {
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return nil, err
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}
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stream, err := conn.quicConn.OpenStream()
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if err != nil {
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return nil, err
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}
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return &clientConn{
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Stream: stream,
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destination: destination,
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}, nil
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}
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func (c *Client) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
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if c.udpDisabled {
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return nil, os.ErrInvalid
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}
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conn, err := c.offer(ctx)
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if err != nil {
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return nil, err
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}
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if conn.udpDisabled {
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return nil, E.New("UDP disabled by server")
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}
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stream, err := conn.quicConn.OpenStream()
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if err != nil {
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return nil, err
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}
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buffer := WriteClientRequest(ClientRequest{
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UDP: true,
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Host: destination.AddrString(),
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Port: destination.Port,
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}, nil)
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_, err = stream.Write(buffer.Bytes())
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buffer.Release()
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if err != nil {
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stream.Close()
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return nil, err
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}
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response, err := ReadServerResponse(stream)
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if err != nil {
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stream.Close()
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return nil, err
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}
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if !response.OK {
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stream.Close()
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return nil, E.New("remote error: ", response.Message)
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}
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clientPacketConn := newUDPPacketConn(c.ctx, conn.quicConn, func() {
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stream.CancelRead(0)
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stream.Close()
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conn.udpAccess.Lock()
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delete(conn.udpConnMap, response.UDPSessionID)
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conn.udpAccess.Unlock()
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})
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conn.udpAccess.Lock()
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if debug.Enabled {
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if _, connExists := conn.udpConnMap[response.UDPSessionID]; connExists {
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stream.Close()
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return nil, E.New("udp session id duplicated")
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}
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}
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conn.udpConnMap[response.UDPSessionID] = clientPacketConn
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conn.udpAccess.Unlock()
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clientPacketConn.sessionID = response.UDPSessionID
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go func() {
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holdBuffer := make([]byte, 1024)
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for {
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_, hErr := stream.Read(holdBuffer)
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if hErr != nil {
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break
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}
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}
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clientPacketConn.closeWithError(E.Cause(net.ErrClosed, "hold stream closed"))
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}()
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return clientPacketConn, nil
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}
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func (c *Client) CloseWithError(err error) error {
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conn := c.conn
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if conn != nil {
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conn.closeWithError(err)
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}
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return nil
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}
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type clientQUICConnection struct {
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quicConn quic.Connection
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rawConn io.Closer
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closeOnce sync.Once
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connDone chan struct{}
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connErr error
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udpDisabled bool
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udpAccess sync.RWMutex
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udpConnMap map[uint32]*udpPacketConn
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}
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func (c *clientQUICConnection) active() bool {
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select {
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case <-c.quicConn.Context().Done():
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return false
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default:
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}
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select {
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case <-c.connDone:
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return false
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default:
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}
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return true
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}
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func (c *clientQUICConnection) closeWithError(err error) {
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c.closeOnce.Do(func() {
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c.connErr = err
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close(c.connDone)
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_ = c.quicConn.CloseWithError(0, "")
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_ = c.rawConn.Close()
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})
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}
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type clientConn struct {
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quic.Stream
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destination M.Socksaddr
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requestWritten bool
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responseRead bool
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}
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func (c *clientConn) NeedHandshake() bool {
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return !c.requestWritten
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}
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func (c *clientConn) Read(p []byte) (n int, err error) {
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if c.responseRead {
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n, err = c.Stream.Read(p)
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return n, baderror.WrapQUIC(err)
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}
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response, err := ReadServerResponse(c.Stream)
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if err != nil {
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return 0, baderror.WrapQUIC(err)
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}
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if !response.OK {
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err = E.New("remote error: ", response.Message)
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return
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}
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c.responseRead = true
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n, err = c.Stream.Read(p)
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return n, baderror.WrapQUIC(err)
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}
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func (c *clientConn) Write(p []byte) (n int, err error) {
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if !c.requestWritten {
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buffer := WriteClientRequest(ClientRequest{
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UDP: false,
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Host: c.destination.AddrString(),
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Port: c.destination.Port,
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}, p)
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defer buffer.Release()
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_, err = c.Stream.Write(buffer.Bytes())
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if err != nil {
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return
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}
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c.requestWritten = true
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return len(p), nil
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}
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n, err = c.Stream.Write(p)
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return n, baderror.WrapQUIC(err)
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}
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func (c *clientConn) LocalAddr() net.Addr {
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return M.Socksaddr{}
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}
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func (c *clientConn) RemoteAddr() net.Addr {
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return M.Socksaddr{}
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}
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func (c *clientConn) Close() error {
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c.Stream.CancelRead(0)
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return c.Stream.Close()
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}
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