func (l *Config) GetValidatedUserDN(conn *ldap.Conn, userDN string) (string, error) {
	return l.GetValidatedDNUnderBaseDN(conn, userDN, l.LDAP.UserDNSearchBaseDistNames)
}

// GetValidatedGroupDN validates the given group DN. If conn is nil, creates a
// connection.
func (l *Config) GetValidatedGroupDN(conn *ldap.Conn, groupDN string) (string, error) {
	if conn == nil {
		var err error

	}
	defer l.Close()
	conn, err := connect(f)
	if err != nil {
		t.Fatalf("failed to connect %v", err)
	}
	conn.Close()
}

func connect(socket string) (*grpc.ClientConn, error) {
	var opts []grpc.DialOption

	opts = append(opts, grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithContextDialer(func(ctx context.Context, addr string) (net.Conn, error) {
		var d net.Dialer

		Dial: func() (redis.Conn, error) {
			conn, err := redis.Dial("tcp", args.Addr.String())
			if err != nil {
				return nil, err
			}

			if args.Password != "" {
				if args.User != "" {
					if _, err = conn.Do("AUTH", args.User, args.Password); err != nil {
						conn.Close()
						return nil, err
					}
				} else {
					if _, err = conn.Do("AUTH", args.Password); err != nil {

        for ( SmbTransportImpl conn : this.connections ) {
            if ( conn.matches(address, port, localAddr, localPort, hostName)
                    && ( tc.getConfig().getSessionLimit() == 0 || conn.getNumSessions() < tc.getConfig().getSessionLimit() ) ) {
                try {
                    if ( conn.isFailed() || ( connectedOnly && conn.isDisconnected() ) ) {
                        continue;

	return c
}

// WithWriteDeadline sets a new write side net.Conn deadline.
func (c *DeadlineConn) WithWriteDeadline(d time.Duration) *DeadlineConn {
	c.writeDeadline = d
	return c
}

// New - creates a new connection object wrapping net.Conn with deadlines.
func New(c net.Conn) *DeadlineConn {
	return &DeadlineConn{
		Conn: c,
	}

}

// monitorState will monitor the state of the connection and close the net.Conn if it changes.
func (c *Connection) monitorState(conn net.Conn, cancel context.CancelCauseFunc) {
	c.connChange.L.Lock()
	defer c.connChange.L.Unlock()
	for {
		newState := c.State()
		if newState != StateConnected {
			conn.Close()
			cancel(ErrDisconnected)
			return
		}
		// Unlock and wait for state change.

     * {@link JarURLConnection#getJarFile()}の例外処理をラップするメソッドです。
     *
     * @param conn
     *            {@link JarURLConnection}。{@literal null}であってはいけません
     * @return {@link JarFile}
     */
    public static JarFile getJarFile(final JarURLConnection conn) {
        assertArgumentNotNull("conn", conn);

        try {
            return conn.getJarFile();
        } catch (final IOException e) {

	// Reason why cannot lock conn.PrepareContext
	// suppose the maxopen is 1, g1 is creating record and g2 is querying record.
	// 1. g1 begin tx, g1 is requeue because of waiting for the system call, now `db.ConnPool` db.numOpen == 1.
	// 2. g2 select lock `conn.PrepareContext(ctx, query)`, now db.numOpen == db.maxOpen , wait for release.
	// 3. g1 tx exec insert, wait for unlock `conn.PrepareContext(ctx, query)` to finish tx and release.

pkg database/sql, method (*Conn) BeginTx(context.Context, *TxOptions) (*Tx, error)
pkg database/sql, method (*Conn) Close() error
pkg database/sql, method (*Conn) ExecContext(context.Context, string, ...interface{}) (Result, error)
pkg database/sql, method (*Conn) PingContext(context.Context) error
pkg database/sql, method (*Conn) PrepareContext(context.Context, string) (*Stmt, error)

	defer conn.Close()

	context.AfterFunc(ctx, func() {
		log.Debug("context cancelled - closing conn")
		conn.Close()
	})

	// before doing anything, add the connection to the list of active connections
	z.conns.addConn(conn)
	defer z.conns.deleteConn(conn)

	// get hello message from ztunnel
	m, _, err := readProto[zdsapi.ZdsHello](conn.u, readWriteDeadline, nil)
	if err != nil {
		return err
	}