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| 1 | +//go:build with_quic |
| 2 | + |
| 3 | +package inbound |
| 4 | + |
| 5 | +import ( |
| 6 | + "context" |
| 7 | + "net" |
| 8 | + "net/http" |
| 9 | + "net/http/httputil" |
| 10 | + "net/url" |
| 11 | + |
| 12 | + "github.com/sagernet/sing-box/adapter" |
| 13 | + "github.com/sagernet/sing-box/common/tls" |
| 14 | + C "github.com/sagernet/sing-box/constant" |
| 15 | + "github.com/sagernet/sing-box/log" |
| 16 | + "github.com/sagernet/sing-box/option" |
| 17 | + "github.com/sagernet/sing-box/transport/hysteria2" |
| 18 | + "github.com/sagernet/sing/common" |
| 19 | + "github.com/sagernet/sing/common/auth" |
| 20 | + E "github.com/sagernet/sing/common/exceptions" |
| 21 | + N "github.com/sagernet/sing/common/network" |
| 22 | +) |
| 23 | + |
| 24 | +var _ adapter.Inbound = (*Hysteria2)(nil) |
| 25 | + |
| 26 | +type Hysteria2 struct { |
| 27 | + myInboundAdapter |
| 28 | + tlsConfig tls.ServerConfig |
| 29 | + server *hysteria2.Server |
| 30 | +} |
| 31 | + |
| 32 | +func NewHysteria2(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.Hysteria2InboundOptions) (*Hysteria2, error) { |
| 33 | + if options.TLS == nil || !options.TLS.Enabled { |
| 34 | + return nil, C.ErrTLSRequired |
| 35 | + } |
| 36 | + tlsConfig, err := tls.NewServer(ctx, logger, common.PtrValueOrDefault(options.TLS)) |
| 37 | + if err != nil { |
| 38 | + return nil, err |
| 39 | + } |
| 40 | + var salamanderPassword string |
| 41 | + if options.Obfs != nil { |
| 42 | + if options.Obfs.Password == "" { |
| 43 | + return nil, E.New("missing obfs password") |
| 44 | + } |
| 45 | + switch options.Obfs.Type { |
| 46 | + case hysteria2.ObfsTypeSalamander: |
| 47 | + salamanderPassword = options.Obfs.Password |
| 48 | + default: |
| 49 | + return nil, E.New("unknown obfs type: ", options.Obfs.Type) |
| 50 | + } |
| 51 | + } |
| 52 | + var masqueradeHandler http.Handler |
| 53 | + if options.Masquerade != "" { |
| 54 | + masqueradeURL, err := url.Parse(options.Masquerade) |
| 55 | + if err != nil { |
| 56 | + return nil, E.Cause(err, "parse masquerade URL") |
| 57 | + } |
| 58 | + switch masqueradeURL.Scheme { |
| 59 | + case "file": |
| 60 | + masqueradeHandler = http.FileServer(http.Dir(masqueradeURL.Path)) |
| 61 | + case "http", "https": |
| 62 | + masqueradeHandler = &httputil.ReverseProxy{ |
| 63 | + Rewrite: func(r *httputil.ProxyRequest) { |
| 64 | + r.SetURL(masqueradeURL) |
| 65 | + r.Out.Host = r.In.Host |
| 66 | + }, |
| 67 | + ErrorHandler: func(w http.ResponseWriter, r *http.Request, err error) { |
| 68 | + w.WriteHeader(http.StatusBadGateway) |
| 69 | + }, |
| 70 | + } |
| 71 | + default: |
| 72 | + return nil, E.New("unknown masquerade URL scheme: ", masqueradeURL.Scheme) |
| 73 | + } |
| 74 | + } |
| 75 | + inbound := &Hysteria2{ |
| 76 | + myInboundAdapter: myInboundAdapter{ |
| 77 | + protocol: C.TypeHysteria2, |
| 78 | + network: []string{N.NetworkUDP}, |
| 79 | + ctx: ctx, |
| 80 | + router: router, |
| 81 | + logger: logger, |
| 82 | + tag: tag, |
| 83 | + listenOptions: options.ListenOptions, |
| 84 | + }, |
| 85 | + tlsConfig: tlsConfig, |
| 86 | + } |
| 87 | + server, err := hysteria2.NewServer(hysteria2.ServerOptions{ |
| 88 | + Context: ctx, |
| 89 | + Logger: logger, |
| 90 | + SendBPS: uint64(options.UpMbps * 1024 * 1024), |
| 91 | + ReceiveBPS: uint64(options.DownMbps * 1024 * 1024), |
| 92 | + SalamanderPassword: salamanderPassword, |
| 93 | + TLSConfig: tlsConfig, |
| 94 | + Users: common.Map(options.Users, func(it option.Hysteria2User) hysteria2.User { |
| 95 | + return hysteria2.User(it) |
| 96 | + }), |
| 97 | + IgnoreClientBandwidth: options.IgnoreClientBandwidth, |
| 98 | + Handler: adapter.NewUpstreamHandler(adapter.InboundContext{}, inbound.newConnection, inbound.newPacketConnection, nil), |
| 99 | + MasqueradeHandler: masqueradeHandler, |
| 100 | + }) |
| 101 | + if err != nil { |
| 102 | + return nil, err |
| 103 | + } |
| 104 | + inbound.server = server |
| 105 | + return inbound, nil |
| 106 | +} |
| 107 | + |
| 108 | +func (h *Hysteria2) newConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error { |
| 109 | + ctx = log.ContextWithNewID(ctx) |
| 110 | + h.logger.InfoContext(ctx, "inbound connection to ", metadata.Destination) |
| 111 | + metadata = h.createMetadata(conn, metadata) |
| 112 | + metadata.User, _ = auth.UserFromContext[string](ctx) |
| 113 | + return h.router.RouteConnection(ctx, conn, metadata) |
| 114 | +} |
| 115 | + |
| 116 | +func (h *Hysteria2) newPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error { |
| 117 | + ctx = log.ContextWithNewID(ctx) |
| 118 | + metadata = h.createPacketMetadata(conn, metadata) |
| 119 | + metadata.User, _ = auth.UserFromContext[string](ctx) |
| 120 | + h.logger.InfoContext(ctx, "inbound packet connection to ", metadata.Destination) |
| 121 | + return h.router.RoutePacketConnection(ctx, conn, metadata) |
| 122 | +} |
| 123 | + |
| 124 | +func (h *Hysteria2) Start() error { |
| 125 | + if h.tlsConfig != nil { |
| 126 | + err := h.tlsConfig.Start() |
| 127 | + if err != nil { |
| 128 | + return err |
| 129 | + } |
| 130 | + } |
| 131 | + packetConn, err := h.myInboundAdapter.ListenUDP() |
| 132 | + if err != nil { |
| 133 | + return err |
| 134 | + } |
| 135 | + return h.server.Start(packetConn) |
| 136 | +} |
| 137 | + |
| 138 | +func (h *Hysteria2) Close() error { |
| 139 | + return common.Close( |
| 140 | + &h.myInboundAdapter, |
| 141 | + h.tlsConfig, |
| 142 | + common.PtrOrNil(h.server), |
| 143 | + ) |
| 144 | +} |
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