1*4724848cSchristos=pod 2*4724848cSchristos 3*4724848cSchristos=head1 NAME 4*4724848cSchristos 5*4724848cSchristosBIO_f_null - null filter 6*4724848cSchristos 7*4724848cSchristos=head1 SYNOPSIS 8*4724848cSchristos 9*4724848cSchristos #include <openssl/bio.h> 10*4724848cSchristos 11*4724848cSchristos const BIO_METHOD *BIO_f_null(void); 12*4724848cSchristos 13*4724848cSchristos=head1 DESCRIPTION 14*4724848cSchristos 15*4724848cSchristosBIO_f_null() returns the null filter BIO method. This is a filter BIO 16*4724848cSchristosthat does nothing. 17*4724848cSchristos 18*4724848cSchristosAll requests to a null filter BIO are passed through to the next BIO in 19*4724848cSchristosthe chain: this means that a BIO chain containing a null filter BIO 20*4724848cSchristosbehaves just as though the BIO was not there. 21*4724848cSchristos 22*4724848cSchristos=head1 NOTES 23*4724848cSchristos 24*4724848cSchristosAs may be apparent a null filter BIO is not particularly useful. 25*4724848cSchristos 26*4724848cSchristos=head1 RETURN VALUES 27*4724848cSchristos 28*4724848cSchristosBIO_f_null() returns the null filter BIO method. 29*4724848cSchristos 30*4724848cSchristos=head1 COPYRIGHT 31*4724848cSchristos 32*4724848cSchristosCopyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved. 33*4724848cSchristos 34*4724848cSchristosLicensed under the OpenSSL license (the "License"). You may not use 35*4724848cSchristosthis file except in compliance with the License. You can obtain a copy 36*4724848cSchristosin the file LICENSE in the source distribution or at 37*4724848cSchristosL<https://www.openssl.org/source/license.html>. 38*4724848cSchristos 39*4724848cSchristos=cut 40