1*1dcdf01fSchristos=pod 2*1dcdf01fSchristos 3*1dcdf01fSchristos=head1 NAME 4*1dcdf01fSchristos 5*1dcdf01fSchristosBIO_f_null - null filter 6*1dcdf01fSchristos 7*1dcdf01fSchristos=head1 SYNOPSIS 8*1dcdf01fSchristos 9*1dcdf01fSchristos #include <openssl/bio.h> 10*1dcdf01fSchristos 11*1dcdf01fSchristos const BIO_METHOD *BIO_f_null(void); 12*1dcdf01fSchristos 13*1dcdf01fSchristos=head1 DESCRIPTION 14*1dcdf01fSchristos 15*1dcdf01fSchristosBIO_f_null() returns the null filter BIO method. This is a filter BIO 16*1dcdf01fSchristosthat does nothing. 17*1dcdf01fSchristos 18*1dcdf01fSchristosAll requests to a null filter BIO are passed through to the next BIO in 19*1dcdf01fSchristosthe chain: this means that a BIO chain containing a null filter BIO 20*1dcdf01fSchristosbehaves just as though the BIO was not there. 21*1dcdf01fSchristos 22*1dcdf01fSchristos=head1 NOTES 23*1dcdf01fSchristos 24*1dcdf01fSchristosAs may be apparent a null filter BIO is not particularly useful. 25*1dcdf01fSchristos 26*1dcdf01fSchristos=head1 RETURN VALUES 27*1dcdf01fSchristos 28*1dcdf01fSchristosBIO_f_null() returns the null filter BIO method. 29*1dcdf01fSchristos 30*1dcdf01fSchristos=head1 COPYRIGHT 31*1dcdf01fSchristos 32*1dcdf01fSchristosCopyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved. 33*1dcdf01fSchristos 34*1dcdf01fSchristosLicensed under the OpenSSL license (the "License"). You may not use 35*1dcdf01fSchristosthis file except in compliance with the License. You can obtain a copy 36*1dcdf01fSchristosin the file LICENSE in the source distribution or at 37*1dcdf01fSchristosL<https://www.openssl.org/source/license.html>. 38*1dcdf01fSchristos 39*1dcdf01fSchristos=cut 40