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Member "openssl-1.0.2q/doc/crypto/BIO_f_null.pod" (20 Nov 2018, 592 Bytes) of package /linux/misc/openssl-1.0.2q.tar.gz:
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side-by-side code changes report for "BIO_f_null.pod": 1.1.0g_vs_1.1.1-pre2
BIO_f_null - null filter
BIO_METHOD * BIO_f_null(void);
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.
As may be apparent a null filter BIO is not particularly useful.
BIO_f_null() returns the null filter BIO method.