- NAME
- SYNOPSIS
- DESCRIPTION
- NOTES
- RETURN VALUES
- COPYRIGHT

# NAME

BIO_f_null - null filter

# SYNOPSIS

     #include <openssl/bio.h>

     const BIO_METHOD *BIO_f_null(void);

# DESCRIPTION

`BIO_f_null()` returns the null filter BIO method. This is a filter BIO that does nothing.

All requests to a null filter BIO are passed through to the next BIO in the chain: this means that a BIO chain containing a null filter BIO behaves just as though the BIO was not there.

# NOTES

As may be apparent a null filter BIO is not particularly useful.

# RETURN VALUES

`BIO_f_null()` returns the null filter BIO method.

# COPYRIGHT

Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at https://www.openssl.org/source/license.html.