1*2175Sjp161948=pod 2*2175Sjp161948 3*2175Sjp161948=head1 NAME 4*2175Sjp161948 5*2175Sjp161948BIO_f_null - null filter 6*2175Sjp161948 7*2175Sjp161948=head1 SYNOPSIS 8*2175Sjp161948 9*2175Sjp161948 #include <openssl/bio.h> 10*2175Sjp161948 11*2175Sjp161948 BIO_METHOD * BIO_f_null(void); 12*2175Sjp161948 13*2175Sjp161948=head1 DESCRIPTION 14*2175Sjp161948 15*2175Sjp161948BIO_f_null() returns the null filter BIO method. This is a filter BIO 16*2175Sjp161948that does nothing. 17*2175Sjp161948 18*2175Sjp161948All requests to a null filter BIO are passed through to the next BIO in 19*2175Sjp161948the chain: this means that a BIO chain containing a null filter BIO 20*2175Sjp161948behaves just as though the BIO was not there. 21*2175Sjp161948 22*2175Sjp161948=head1 NOTES 23*2175Sjp161948 24*2175Sjp161948As may be apparent a null filter BIO is not particularly useful. 25*2175Sjp161948 26*2175Sjp161948=head1 RETURN VALUES 27*2175Sjp161948 28*2175Sjp161948BIO_f_null() returns the null filter BIO method. 29*2175Sjp161948 30*2175Sjp161948=head1 SEE ALSO 31*2175Sjp161948 32*2175Sjp161948TBA 33