refactor: Modular inbounds/outbounds

protocol/http/inbound.go

@@ -0,0 +1,122 @@
+package http
+
+import (
+	std_bufio "bufio"
+	"context"
+	"net"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/adapter/inbound"
+	"github.com/sagernet/sing-box/common/listener"
+	"github.com/sagernet/sing-box/common/tls"
+	"github.com/sagernet/sing-box/common/uot"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/auth"
+	E "github.com/sagernet/sing/common/exceptions"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/protocol/http"
+)
+
+func RegisterInbound(registry *inbound.Registry) {
+	inbound.Register[option.HTTPMixedInboundOptions](registry, C.TypeHTTP, NewInbound)
+}
+
+var _ adapter.TCPInjectableInbound = (*Inbound)(nil)
+
+type Inbound struct {
+	inbound.Adapter
+	router        adapter.ConnectionRouterEx
+	logger        log.ContextLogger
+	listener      *listener.Listener
+	authenticator *auth.Authenticator
+	tlsConfig     tls.ServerConfig
+}
+
+func NewInbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.HTTPMixedInboundOptions) (adapter.Inbound, error) {
+	inbound := &Inbound{
+		Adapter:       inbound.NewAdapter(C.TypeHTTP, tag),
+		router:        uot.NewRouter(router, logger),
+		logger:        logger,
+		authenticator: auth.NewAuthenticator(options.Users),
+	}
+	if options.TLS != nil {
+		tlsConfig, err := tls.NewServer(ctx, logger, common.PtrValueOrDefault(options.TLS))
+		if err != nil {
+			return nil, err
+		}
+		inbound.tlsConfig = tlsConfig
+	}
+	inbound.listener = listener.New(listener.Options{
+		Context:           ctx,
+		Logger:            logger,
+		Network:           []string{N.NetworkTCP},
+		Listen:            options.ListenOptions,
+		ConnectionHandler: inbound,
+		SetSystemProxy:    options.SetSystemProxy,
+		SystemProxySOCKS:  false,
+	})
+	return inbound, nil
+}
+
+func (h *Inbound) Start() error {
+	if h.tlsConfig != nil {
+		err := h.tlsConfig.Start()
+		if err != nil {
+			return E.Cause(err, "create TLS config")
+		}
+	}
+	return h.listener.Start()
+}
+
+func (h *Inbound) Close() error {
+	return common.Close(
+		&h.listener,
+		h.tlsConfig,
+	)
+}
+
+func (h *Inbound) NewConnectionEx(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) {
+	err := h.newConnection(ctx, conn, metadata, onClose)
+	N.CloseOnHandshakeFailure(conn, onClose, err)
+	if err != nil {
+		h.logger.ErrorContext(ctx, E.Cause(err, "process connection from ", metadata.Source))
+	}
+}
+
+func (h *Inbound) newConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) error {
+	var err error
+	if h.tlsConfig != nil {
+		conn, err = tls.ServerHandshake(ctx, conn, h.tlsConfig)
+		if err != nil {
+			return err
+		}
+	}
+	return http.HandleConnectionEx(ctx, conn, std_bufio.NewReader(conn), h.authenticator, nil, adapter.NewUpstreamHandlerEx(metadata, h.newUserConnection, h.streamUserPacketConnection), metadata.Source, onClose)
+}
+
+func (h *Inbound) newUserConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) {
+	user, loaded := auth.UserFromContext[string](ctx)
+	if !loaded {
+		h.logger.InfoContext(ctx, "inbound connection to ", metadata.Destination)
+		h.router.RouteConnectionEx(ctx, conn, metadata, onClose)
+		return
+	}
+	metadata.User = user
+	h.logger.InfoContext(ctx, "[", user, "] inbound connection to ", metadata.Destination)
+	h.router.RouteConnectionEx(ctx, conn, metadata, onClose)
+}
+
+func (h *Inbound) streamUserPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) {
+	user, loaded := auth.UserFromContext[string](ctx)
+	if !loaded {
+		h.logger.InfoContext(ctx, "inbound packet connection to ", metadata.Destination)
+		h.router.RoutePacketConnectionEx(ctx, conn, metadata, onClose)
+		return
+	}
+	metadata.User = user
+	h.logger.InfoContext(ctx, "[", user, "] inbound packet connection to ", metadata.Destination)
+	h.router.RoutePacketConnectionEx(ctx, conn, metadata, onClose)
+}