refactor: Modular inbounds/outbounds

protocol/shadowtls/inbound.go

@@ -0,0 +1,120 @@
+package shadowtls
+
+import (
+	"context"
+	"net"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/adapter/inbound"
+	"github.com/sagernet/sing-box/common/dialer"
+	"github.com/sagernet/sing-box/common/listener"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing-shadowtls"
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/auth"
+	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/logger"
+	N "github.com/sagernet/sing/common/network"
+)
+
+func RegisterInbound(registry *inbound.Registry) {
+	inbound.Register[option.ShadowTLSInboundOptions](registry, C.TypeShadowTLS, NewInbound)
+}
+
+type Inbound struct {
+	inbound.Adapter
+	router   adapter.Router
+	logger   logger.ContextLogger
+	listener *listener.Listener
+	service  *shadowtls.Service
+}
+
+func NewInbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.ShadowTLSInboundOptions) (adapter.Inbound, error) {
+	inbound := &Inbound{
+		Adapter: inbound.NewAdapter(C.TypeShadowTLS, tag),
+		router:  router,
+		logger:  logger,
+	}
+
+	if options.Version == 0 {
+		options.Version = 1
+	}
+
+	var handshakeForServerName map[string]shadowtls.HandshakeConfig
+	if options.Version > 1 {
+		handshakeForServerName = make(map[string]shadowtls.HandshakeConfig)
+		for serverName, serverOptions := range options.HandshakeForServerName {
+			handshakeDialer, err := dialer.New(router, serverOptions.DialerOptions)
+			if err != nil {
+				return nil, err
+			}
+			handshakeForServerName[serverName] = shadowtls.HandshakeConfig{
+				Server: serverOptions.ServerOptions.Build(),
+				Dialer: handshakeDialer,
+			}
+		}
+	}
+	handshakeDialer, err := dialer.New(router, options.Handshake.DialerOptions)
+	if err != nil {
+		return nil, err
+	}
+	service, err := shadowtls.NewService(shadowtls.ServiceConfig{
+		Version:  options.Version,
+		Password: options.Password,
+		Users: common.Map(options.Users, func(it option.ShadowTLSUser) shadowtls.User {
+			return (shadowtls.User)(it)
+		}),
+		Handshake: shadowtls.HandshakeConfig{
+			Server: options.Handshake.ServerOptions.Build(),
+			Dialer: handshakeDialer,
+		},
+		HandshakeForServerName: handshakeForServerName,
+		StrictMode:             options.StrictMode,
+		Handler:                adapter.NewUpstreamContextHandler(inbound.newConnection, nil, nil),
+		Logger:                 logger,
+	})
+	if err != nil {
+		return nil, err
+	}
+	inbound.service = service
+	inbound.listener = listener.New(listener.Options{
+		Context:           ctx,
+		Logger:            logger,
+		Network:           []string{N.NetworkTCP},
+		Listen:            options.ListenOptions,
+		ConnectionHandler: inbound,
+	})
+	return inbound, nil
+}
+
+func (h *Inbound) Start() error {
+	return h.listener.Start()
+}
+
+func (h *Inbound) Close() error {
+	return h.listener.Close()
+}
+
+func (h *Inbound) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
+	return h.service.NewConnection(adapter.WithContext(log.ContextWithNewID(ctx), &metadata), conn, adapter.UpstreamMetadata(metadata))
+}
+
+func (h *Inbound) newConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
+	if userName, _ := auth.UserFromContext[string](ctx); userName != "" {
+		metadata.User = userName
+		h.logger.InfoContext(ctx, "[", userName, "] inbound connection to ", metadata.Destination)
+	} else {
+		h.logger.InfoContext(ctx, "inbound connection to ", metadata.Destination)
+	}
+	return h.router.RouteConnection(ctx, conn, metadata)
+}
+
+func (h *Inbound) NewConnectionEx(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) {
+	err := h.NewConnection(ctx, conn, metadata)
+	N.CloseOnHandshakeFailure(conn, onClose, err)
+	if err != nil {
+		h.logger.ErrorContext(ctx, E.Cause(err, "process connection from ", metadata.Source))
+	}
+}