// +build go1.6

package graceful

import "crypto/tls"

// cloneTLSConfig was taken from the Go standard library's net/http package. We
// need it because tls.Config objects now contain a sync.Once.
func cloneTLSConfig(cfg *tls.Config) *tls.Config {
	if cfg == nil {
		return &tls.Config{}
	}
	return &tls.Config{
		Rand:                     cfg.Rand,
		Time:                     cfg.Time,
		Certificates:             cfg.Certificates,
		NameToCertificate:        cfg.NameToCertificate,
		GetCertificate:           cfg.GetCertificate,
		RootCAs:                  cfg.RootCAs,
		NextProtos:               cfg.NextProtos,
		ServerName:               cfg.ServerName,
		ClientAuth:               cfg.ClientAuth,
		ClientCAs:                cfg.ClientCAs,
		InsecureSkipVerify:       cfg.InsecureSkipVerify,
		CipherSuites:             cfg.CipherSuites,
		PreferServerCipherSuites: cfg.PreferServerCipherSuites,
		SessionTicketsDisabled:   cfg.SessionTicketsDisabled,
		SessionTicketKey:         cfg.SessionTicketKey,
		ClientSessionCache:       cfg.ClientSessionCache,
		MinVersion:               cfg.MinVersion,
		MaxVersion:               cfg.MaxVersion,
		CurvePreferences:         cfg.CurvePreferences,
	}
}