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Command: BIO_f_null | Section: 3 | Source: OpenBSD | File: BIO_f_null.3
BIO_F_NULL(3) FreeBSD Library Functions Manual BIO_F_NULL(3)
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. As may be apparent, a null filter BIO is not
particularly useful.
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.
A chain containing a null filter BIO cannot be copied with
BIO_dup_chain(3), and any attempt to do so fails and returns NULL.
RETURN VALUES
BIO_f_null() returns the null filter BIO method.
When called on a null filter BIO object, BIO_method_type(3) returns the
constant BIO_TYPE_NULL_FILTER and BIO_method_name(3) returns a pointer to
the static string "NULL filter", not to be confused with a NUL string nor
with a NULL pointer.
SEE ALSO
BIO_new(3)
HISTORY
BIO_f_null() first appeared in SSLeay 0.8.0 and has been available since
OpenBSD 2.4.
FreeBSD 14.1-RELEASE-p8 April 11, 2023 FreeBSD 14.1-RELEASE-p8