XTLS/Xray-core · error

invalid request version

Error message

invalid request version

What it means

Error "invalid request version" thrown in XTLS/Xray-core.

Source

Thrown at proxy/vless/encoding/encoding.go:130

		request.Command = protocol.RequestCommand(buffer.Byte(0))
		switch request.Command {
		case protocol.RequestCommandMux:
			request.Address = net.DomainAddress("v1.mux.cool")
		case protocol.RequestCommandRvs:
			request.Address = net.DomainAddress("v1.rvs.cool")
		case protocol.RequestCommandTCP, protocol.RequestCommandUDP:
			if addr, port, err := addrParser.ReadAddressPort(&buffer, reader); err == nil {
				request.Address = addr
				request.Port = port
			}
		}
		if request.Address == nil {
			return nil, nil, nil, false, errors.New("invalid request address")
		}
		return id[:], request, requestAddons, false, nil
	default:
		return nil, nil, nil, isfb, errors.New("invalid request version")
	}
}

// EncodeResponseHeader writes encoded response header into the given writer.
func EncodeResponseHeader(writer io.Writer, request *protocol.RequestHeader, responseAddons *Addons) error {
	buffer := buf.StackNew()
	defer buffer.Release()

	if err := buffer.WriteByte(request.Version); err != nil {
		return errors.New("failed to write response version").Base(err)
	}

	if err := EncodeHeaderAddons(&buffer, responseAddons); err != nil {
		return errors.New("failed to encode response header addons").Base(err)
	}

	if _, err := writer.Write(buffer.Bytes()); err != nil {
		return errors.New("failed to write response header").Base(err)

View on GitHub (pinned to 7d214f8b09)

When it happens

Trigger: Thrown at proxy/vless/encoding/encoding.go:130 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of XTLS/Xray-core@7d214f8b09 (2026-08-15). Data as JSON: /api/errors/1385c83246091d69. Report an issue: GitHub.