return func(sz int64, err error) {
		globalTrace.Publish(sftpTrace(s, startTime, source, user, err, sz))
	}
}

// NewSFTPDriver initializes sftp.Handlers implementation of following interfaces
//
// - sftp.Fileread
// - sftp.Filewrite
// - sftp.Filelist
// - sftp.Filecmd
func NewSFTPDriver(perms *ssh.Permissions, remoteIP string) sftp.Handlers {
	handler := &sftpDriver{

		var remoteIP string

		if host, _, err := net.SplitHostPort(sconn.RemoteAddr().String()); err == nil {
			remoteIP = host
		}
		server := sftp.NewRequestServer(channel, NewSFTPDriver(sconn.Permissions, remoteIP), sftp.WithRSAllocator())
		defer server.Close()
		server.Serve()
	}

	sftpServer, err := xsftp.NewServer(&xsftp.Options{
		PublicIP: publicIP,
		Port:     port,