Refactor adapter

adapter/inbound/mixed.go

@@ -0,0 +1,58 @@
+package inbound
+
+import (
+	std_bufio "bufio"
+	"context"
+	"net"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/config"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing/common/auth"
+	"github.com/sagernet/sing/common/buf"
+	"github.com/sagernet/sing/common/bufio"
+	M "github.com/sagernet/sing/common/metadata"
+	"github.com/sagernet/sing/common/rw"
+	"github.com/sagernet/sing/protocol/http"
+	"github.com/sagernet/sing/protocol/socks"
+	"github.com/sagernet/sing/protocol/socks/socks4"
+	"github.com/sagernet/sing/protocol/socks/socks5"
+)
+
+var _ adapter.Inbound = (*Mixed)(nil)
+
+type Mixed struct {
+	myInboundAdapter
+	authenticator auth.Authenticator
+}
+
+func NewMixed(ctx context.Context, router adapter.Router, logger log.Logger, tag string, options *config.SimpleInboundOptions) *Mixed {
+	inbound := &Mixed{
+		myInboundAdapter{
+			protocol:      C.TypeMixed,
+			network:       []string{C.NetworkTCP},
+			ctx:           ctx,
+			router:        router,
+			logger:        logger,
+			tag:           tag,
+			listenOptions: options.ListenOptions,
+		},
+		auth.NewAuthenticator(options.Users),
+	}
+	inbound.connHandler = inbound
+	return inbound
+}
+
+func (h *Mixed) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
+	headerType, err := rw.ReadByte(conn)
+	if err != nil {
+		return err
+	}
+	switch headerType {
+	case socks4.Version, socks5.Version:
+		return socks.HandleConnection0(ctx, conn, headerType, h.authenticator, h.upstreamHandler(metadata), M.Metadata{})
+	}
+	reader := std_bufio.NewReader(bufio.NewCachedReader(conn, buf.As([]byte{headerType})))
+	return http.HandleConnection(ctx, conn, reader, h.authenticator, h.upstreamHandler(metadata), M.Metadata{})
+}