125 lines
4.3 KiB
Go
125 lines
4.3 KiB
Go
package inbound
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import (
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"context"
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"net"
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"os"
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"time"
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"github.com/sagernet/sing-box/adapter"
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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/shadowaead_2022"
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"github.com/sagernet/sing/common"
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"github.com/sagernet/sing/common/auth"
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"github.com/sagernet/sing/common/buf"
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F "github.com/sagernet/sing/common/format"
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N "github.com/sagernet/sing/common/network"
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)
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var (
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_ adapter.Inbound = (*ShadowsocksRelay)(nil)
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_ adapter.InjectableInbound = (*ShadowsocksRelay)(nil)
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)
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type ShadowsocksRelay struct {
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myInboundAdapter
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service *shadowaead_2022.RelayService[int]
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destinations []option.ShadowsocksDestination
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}
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func newShadowsocksRelay(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.ShadowsocksInboundOptions) (*ShadowsocksRelay, error) {
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inbound := &ShadowsocksRelay{
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myInboundAdapter: myInboundAdapter{
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protocol: C.TypeShadowsocks,
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network: options.Network.Build(),
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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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tag: tag,
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listenOptions: options.ListenOptions,
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},
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destinations: options.Destinations,
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}
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inbound.connHandler = inbound
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inbound.packetHandler = inbound
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var err error
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inbound.router, err = mux.NewRouterWithOptions(inbound.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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service, err := shadowaead_2022.NewRelayServiceWithPassword[int](
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options.Method,
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options.Password,
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int64(udpTimeout.Seconds()),
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adapter.NewUpstreamContextHandler(inbound.newConnection, inbound.newPacketConnection, inbound),
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)
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if err != nil {
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return nil, err
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}
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err = service.UpdateUsersWithPasswords(common.MapIndexed(options.Destinations, func(index int, user option.ShadowsocksDestination) int {
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return index
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}), common.Map(options.Destinations, func(user option.ShadowsocksDestination) string {
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return user.Password
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}), common.Map(options.Destinations, option.ShadowsocksDestination.Build))
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if err != nil {
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return nil, err
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}
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inbound.service = service
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inbound.packetUpstream = service
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return inbound, err
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}
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func (h *ShadowsocksRelay) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
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return h.service.NewConnection(adapter.WithContext(log.ContextWithNewID(ctx), &metadata), conn, adapter.UpstreamMetadata(metadata))
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}
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func (h *ShadowsocksRelay) NewPacket(ctx context.Context, conn N.PacketConn, buffer *buf.Buffer, metadata adapter.InboundContext) error {
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return h.service.NewPacket(adapter.WithContext(ctx, &metadata), conn, buffer, adapter.UpstreamMetadata(metadata))
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}
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func (h *ShadowsocksRelay) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
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return os.ErrInvalid
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}
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func (h *ShadowsocksRelay) newConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
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destinationIndex, loaded := auth.UserFromContext[int](ctx)
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if !loaded {
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return os.ErrInvalid
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}
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destination := h.destinations[destinationIndex].Name
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if destination == "" {
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destination = F.ToString(destinationIndex)
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} else {
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metadata.User = destination
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}
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h.logger.InfoContext(ctx, "[", destination, "] inbound connection to ", metadata.Destination)
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return h.router.RouteConnection(ctx, conn, metadata)
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}
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func (h *ShadowsocksRelay) newPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
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destinationIndex, loaded := auth.UserFromContext[int](ctx)
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if !loaded {
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return os.ErrInvalid
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}
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destination := h.destinations[destinationIndex].Name
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if destination == "" {
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destination = F.ToString(destinationIndex)
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} else {
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metadata.User = destination
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}
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ctx = log.ContextWithNewID(ctx)
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h.logger.InfoContext(ctx, "[", destination, "] inbound packet connection from ", metadata.Source)
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h.logger.InfoContext(ctx, "[", destination, "] inbound packet connection to ", metadata.Destination)
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return h.router.RoutePacketConnection(ctx, conn, metadata)
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}
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