//go:build !with_ech package tls import ( "context" "github.com/sagernet/sing-box/log" "github.com/sagernet/sing-box/option" E "github.com/sagernet/sing/common/exceptions" ) func NewECHServer(ctx context.Context, logger log.Logger, options option.InboundTLSOptions) (ServerConfig, error) { return nil, E.New(`ECH is not included in this build, rebuild with -tags with_ech`) } func NewECHClient(ctx context.Context, serverAddress string, options option.OutboundTLSOptions) (Config, error) { return nil, E.New(`ECH is not included in this build, rebuild with -tags with_ech`) }