package outbound import ( "context" "net" "github.com/sagernet/sing-box/adapter" "github.com/sagernet/sing-box/common/dialer" "github.com/sagernet/sing-box/common/mux" C "github.com/sagernet/sing-box/constant" "github.com/sagernet/sing-box/log" "github.com/sagernet/sing-box/option" "github.com/sagernet/sing-box/transport/sip003" "github.com/sagernet/sing-shadowsocks2" "github.com/sagernet/sing/common" "github.com/sagernet/sing/common/bufio" E "github.com/sagernet/sing/common/exceptions" M "github.com/sagernet/sing/common/metadata" N "github.com/sagernet/sing/common/network" "github.com/sagernet/sing/common/uot" ) var _ adapter.Outbound = (*Shadowsocks)(nil) type Shadowsocks struct { myOutboundAdapter dialer N.Dialer method shadowsocks.Method serverAddr M.Socksaddr plugin sip003.Plugin uotClient *uot.Client multiplexDialer *mux.Client } func NewShadowsocks(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.ShadowsocksOutboundOptions) (*Shadowsocks, error) { method, err := shadowsocks.CreateMethod(ctx, options.Method, shadowsocks.MethodOptions{ Password: options.Password, }) if err != nil { return nil, err } outbound := &Shadowsocks{ myOutboundAdapter: myOutboundAdapter{ protocol: C.TypeShadowsocks, network: options.Network.Build(), router: router, logger: logger, tag: tag, dependencies: withDialerDependency(options.DialerOptions), }, dialer: dialer.New(router, options.DialerOptions), method: method, serverAddr: options.ServerOptions.Build(), } if options.Plugin != "" { outbound.plugin, err = sip003.CreatePlugin(options.Plugin, options.PluginOptions, router, outbound.dialer, outbound.serverAddr) if err != nil { return nil, err } } uotOptions := common.PtrValueOrDefault(options.UDPOverTCPOptions) if !uotOptions.Enabled { outbound.multiplexDialer, err = mux.NewClientWithOptions((*shadowsocksDialer)(outbound), common.PtrValueOrDefault(options.MultiplexOptions)) if err != nil { return nil, err } } if uotOptions.Enabled { outbound.uotClient = &uot.Client{ Dialer: (*shadowsocksDialer)(outbound), Version: uotOptions.Version, } } return outbound, nil } func (h *Shadowsocks) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) { ctx, metadata := adapter.AppendContext(ctx) metadata.Outbound = h.tag metadata.Destination = destination if h.multiplexDialer == nil { switch N.NetworkName(network) { case N.NetworkTCP: h.logger.InfoContext(ctx, "outbound connection to ", destination) case N.NetworkUDP: if h.uotClient != nil { h.logger.InfoContext(ctx, "outbound UoT connect packet connection to ", destination) return h.uotClient.DialContext(ctx, network, destination) } else { h.logger.InfoContext(ctx, "outbound packet connection to ", destination) } } return (*shadowsocksDialer)(h).DialContext(ctx, network, destination) } else { switch N.NetworkName(network) { case N.NetworkTCP: h.logger.InfoContext(ctx, "outbound multiplex connection to ", destination) case N.NetworkUDP: h.logger.InfoContext(ctx, "outbound multiplex packet connection to ", destination) } return h.multiplexDialer.DialContext(ctx, network, destination) } } func (h *Shadowsocks) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) { ctx, metadata := adapter.AppendContext(ctx) metadata.Outbound = h.tag metadata.Destination = destination if h.multiplexDialer == nil { if h.uotClient != nil { h.logger.InfoContext(ctx, "outbound UoT packet connection to ", destination) return h.uotClient.ListenPacket(ctx, destination) } else { h.logger.InfoContext(ctx, "outbound packet connection to ", destination) } h.logger.InfoContext(ctx, "outbound packet connection to ", destination) return (*shadowsocksDialer)(h).ListenPacket(ctx, destination) } else { h.logger.InfoContext(ctx, "outbound multiplex packet connection to ", destination) return h.multiplexDialer.ListenPacket(ctx, destination) } } func (h *Shadowsocks) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error { return NewConnection(ctx, h, conn, metadata) } func (h *Shadowsocks) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error { return NewPacketConnection(ctx, h, conn, metadata) } func (h *Shadowsocks) InterfaceUpdated() { if h.multiplexDialer != nil { h.multiplexDialer.Reset() } return } func (h *Shadowsocks) Close() error { return common.Close(common.PtrOrNil(h.multiplexDialer)) } var _ N.Dialer = (*shadowsocksDialer)(nil) type shadowsocksDialer Shadowsocks func (h *shadowsocksDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) { ctx, metadata := adapter.AppendContext(ctx) metadata.Outbound = h.tag metadata.Destination = destination switch N.NetworkName(network) { case N.NetworkTCP: var outConn net.Conn var err error if h.plugin != nil { outConn, err = h.plugin.DialContext(ctx) } else { outConn, err = h.dialer.DialContext(ctx, N.NetworkTCP, h.serverAddr) } if err != nil { return nil, err } return h.method.DialEarlyConn(outConn, destination), nil case N.NetworkUDP: outConn, err := h.dialer.DialContext(ctx, N.NetworkUDP, h.serverAddr) if err != nil { return nil, err } return bufio.NewBindPacketConn(h.method.DialPacketConn(outConn), destination), nil default: return nil, E.Extend(N.ErrUnknownNetwork, network) } } func (h *shadowsocksDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) { ctx, metadata := adapter.AppendContext(ctx) metadata.Outbound = h.tag metadata.Destination = destination outConn, err := h.dialer.DialContext(ctx, N.NetworkUDP, h.serverAddr) if err != nil { return nil, err } return h.method.DialPacketConn(outConn), nil }