mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-10 11:03:13 +00:00
121 lines
3.3 KiB
Go
121 lines
3.3 KiB
Go
package inbound
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import (
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"context"
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"crypto/tls"
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"net"
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"os"
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"github.com/sagernet/sing-box/adapter"
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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/common"
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"github.com/sagernet/sing/common/auth"
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E "github.com/sagernet/sing/common/exceptions"
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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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"github.com/sagernet/sing/protocol/trojan"
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)
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var _ adapter.Inbound = (*Trojan)(nil)
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type Trojan struct {
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myInboundAdapter
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service *trojan.Service[int]
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users []option.TrojanUser
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tlsConfig *TLSConfig
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}
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func NewTrojan(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.TrojanInboundOptions) (*Trojan, error) {
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inbound := &Trojan{
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myInboundAdapter: myInboundAdapter{
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protocol: C.TypeTrojan,
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network: []string{N.NetworkTCP},
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ctx: ctx,
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router: router,
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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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users: options.Users,
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}
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service := trojan.NewService[int](adapter.NewUpstreamContextHandler(inbound.newConnection, inbound.newPacketConnection, inbound))
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err := service.UpdateUsers(common.MapIndexed(options.Users, func(index int, it option.TrojanUser) int {
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return index
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}), common.Map(options.Users, func(it option.TrojanUser) string {
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return it.Password
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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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if options.TLS != nil {
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tlsConfig, err := NewTLSConfig(logger, common.PtrValueOrDefault(options.TLS))
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if err != nil {
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return nil, err
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}
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inbound.tlsConfig = tlsConfig
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}
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inbound.service = service
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inbound.connHandler = inbound
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return inbound, nil
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}
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func (h *Trojan) Start() error {
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if h.tlsConfig != nil {
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err := h.tlsConfig.Start()
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if err != nil {
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return E.Cause(err, "create TLS config")
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}
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}
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return common.Start(
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h.service,
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&h.myInboundAdapter,
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)
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}
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func (h *Trojan) Close() error {
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return common.Close(
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h.service,
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&h.myInboundAdapter,
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common.PtrOrNil(h.tlsConfig),
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)
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}
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func (h *Trojan) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
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if h.tlsConfig != nil {
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conn = tls.Server(conn, h.tlsConfig.Config())
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}
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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 *Trojan) newConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
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userIndex, 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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user := h.users[userIndex].Name
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if user == "" {
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user = F.ToString(userIndex)
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} else {
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metadata.User = user
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}
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h.logger.InfoContext(ctx, "[", user, "] 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 *Trojan) newPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
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userIndex, 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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user := h.users[userIndex].Name
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if user == "" {
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user = F.ToString(userIndex)
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} else {
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metadata.User = user
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}
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h.logger.InfoContext(ctx, "[", user, "] 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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