Add redir tproxy and dns inbound

inbound/redirect.go

@@ -0,0 +1,43 @@
+package inbound
+
+import (
+	"context"
+	"net"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/common/redir"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	E "github.com/sagernet/sing/common/exceptions"
+	M "github.com/sagernet/sing/common/metadata"
+)
+
+type Redirect struct {
+	myInboundAdapter
+}
+
+func NewRedirect(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.RedirectInboundOptions) *Redirect {
+	redirect := &Redirect{
+		myInboundAdapter{
+			protocol:      C.TypeRedirect,
+			network:       []string{C.NetworkTCP},
+			ctx:           ctx,
+			router:        router,
+			logger:        logger,
+			tag:           tag,
+			listenOptions: options.ListenOptions,
+		},
+	}
+	redirect.connHandler = redirect
+	return redirect
+}
+
+func (r *Redirect) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
+	destination, err := redir.GetOriginalDestination(conn)
+	if err != nil {
+		return E.Cause(err, "get redirect destination")
+	}
+	metadata.Destination = M.SocksaddrFromNetIP(destination)
+	return r.newConnection(ctx, conn, metadata)
+}