mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-12-05 04:46:40 +00:00
180 lines
6.1 KiB
Go
180 lines
6.1 KiB
Go
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package shadowsocks
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import (
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"context"
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"net"
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"time"
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"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-box/adapter/inbound"
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"github.com/sagernet/sing-box/common/listener"
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"github.com/sagernet/sing-box/common/mux"
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"github.com/sagernet/sing-box/common/uot"
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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing-box/log"
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"github.com/sagernet/sing-box/option"
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"github.com/sagernet/sing-shadowsocks"
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"github.com/sagernet/sing-shadowsocks/shadowaead"
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"github.com/sagernet/sing-shadowsocks/shadowaead_2022"
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"github.com/sagernet/sing/common"
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"github.com/sagernet/sing/common/buf"
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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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"github.com/sagernet/sing/common/ntp"
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)
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func RegisterInbound(registry *inbound.Registry) {
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inbound.Register[option.ShadowsocksInboundOptions](registry, C.TypeShadowsocks, NewInbound)
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}
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func NewInbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.ShadowsocksInboundOptions) (adapter.Inbound, error) {
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if len(options.Users) > 0 && len(options.Destinations) > 0 {
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return nil, E.New("users and destinations options must not be combined")
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}
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if len(options.Users) > 0 {
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return newMultiInbound(ctx, router, logger, tag, options)
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} else if len(options.Destinations) > 0 {
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return newRelayInbound(ctx, router, logger, tag, options)
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} else {
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return newInbound(ctx, router, logger, tag, options)
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}
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}
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var _ adapter.TCPInjectableInbound = (*Inbound)(nil)
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type Inbound struct {
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inbound.Adapter
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ctx context.Context
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router adapter.ConnectionRouterEx
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logger logger.ContextLogger
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listener *listener.Listener
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service shadowsocks.Service
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}
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func newInbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.ShadowsocksInboundOptions) (*Inbound, error) {
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inbound := &Inbound{
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Adapter: inbound.NewAdapter(C.TypeShadowsocks, tag),
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ctx: ctx,
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router: uot.NewRouter(router, logger),
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logger: logger,
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}
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var err error
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inbound.router, err = mux.NewRouterWithOptions(router, logger, common.PtrValueOrDefault(options.Multiplex))
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if err != nil {
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return nil, err
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}
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var udpTimeout time.Duration
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if options.UDPTimeout != 0 {
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udpTimeout = time.Duration(options.UDPTimeout)
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} else {
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udpTimeout = C.UDPTimeout
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}
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switch {
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case options.Method == shadowsocks.MethodNone:
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inbound.service = shadowsocks.NewNoneService(int64(udpTimeout.Seconds()), adapter.NewUpstreamHandler(adapter.InboundContext{}, inbound.newConnection, inbound.newPacketConnection, inbound))
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case common.Contains(shadowaead.List, options.Method):
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inbound.service, err = shadowaead.NewService(options.Method, nil, options.Password, int64(udpTimeout.Seconds()), adapter.NewUpstreamHandler(adapter.InboundContext{}, inbound.newConnection, inbound.newPacketConnection, inbound))
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case common.Contains(shadowaead_2022.List, options.Method):
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inbound.service, err = shadowaead_2022.NewServiceWithPassword(options.Method, options.Password, int64(udpTimeout.Seconds()), adapter.NewUpstreamHandler(adapter.InboundContext{}, inbound.newConnection, inbound.newPacketConnection, inbound), ntp.TimeFuncFromContext(ctx))
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default:
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err = E.New("unsupported method: ", options.Method)
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}
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inbound.listener = listener.New(listener.Options{
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Context: ctx,
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Logger: logger,
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Network: options.Network.Build(),
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Listen: options.ListenOptions,
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ConnectionHandler: inbound,
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PacketHandler: inbound,
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ThreadUnsafePacketWriter: true,
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})
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return inbound, err
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}
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func (h *Inbound) Start() error {
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return h.listener.Start()
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}
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func (h *Inbound) Close() error {
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return h.listener.Close()
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}
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func (h *Inbound) NewConnectionEx(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) {
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err := h.service.NewConnection(ctx, conn, adapter.UpstreamMetadata(metadata))
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N.CloseOnHandshakeFailure(conn, onClose, err)
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if err != nil {
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h.logger.ErrorContext(ctx, E.Cause(err, "process connection from ", metadata.Source))
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}
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}
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func (h *Inbound) NewPacketEx(buffer *buf.Buffer, source M.Socksaddr) {
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err := h.service.NewPacket(h.ctx, &stubPacketConn{h.listener.PacketWriter()}, buffer, M.Metadata{Source: source})
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if err != nil {
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h.logger.Error(E.Cause(err, "process packet from ", source))
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}
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}
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func (h *Inbound) newConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
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h.logger.InfoContext(ctx, "inbound connection to ", metadata.Destination)
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metadata.Inbound = h.Tag()
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metadata.InboundType = h.Type()
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return h.router.RouteConnection(ctx, conn, metadata)
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}
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func (h *Inbound) newPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
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ctx = log.ContextWithNewID(ctx)
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h.logger.InfoContext(ctx, "inbound packet connection from ", metadata.Source)
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h.logger.InfoContext(ctx, "inbound packet connection to ", metadata.Destination)
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metadata.Inbound = h.Tag()
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metadata.InboundType = h.Type()
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metadata.InboundDetour = h.listener.ListenOptions().Detour
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metadata.InboundOptions = h.listener.ListenOptions().InboundOptions
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return h.router.RoutePacketConnection(ctx, conn, metadata)
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}
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var _ N.PacketConn = (*stubPacketConn)(nil)
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type stubPacketConn struct {
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N.PacketWriter
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}
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func (c *stubPacketConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksaddr, err error) {
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panic("stub!")
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}
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func (c *stubPacketConn) Close() error {
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return nil
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}
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func (c *stubPacketConn) LocalAddr() net.Addr {
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panic("stub!")
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}
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func (c *stubPacketConn) SetDeadline(t time.Time) error {
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panic("stub!")
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}
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func (c *stubPacketConn) SetReadDeadline(t time.Time) error {
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panic("stub!")
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}
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func (c *stubPacketConn) SetWriteDeadline(t time.Time) error {
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panic("stub!")
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}
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func (h *Inbound) NewError(ctx context.Context, err error) {
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NewError(h.logger, ctx, err)
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}
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// Deprecated: remove
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func NewError(logger logger.ContextLogger, ctx context.Context, err error) {
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common.Close(err)
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if E.IsClosedOrCanceled(err) {
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logger.DebugContext(ctx, "connection closed: ", err)
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return
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}
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logger.ErrorContext(ctx, err)
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}
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