#include <openssl/ssl.h> BIO
*SSL_get_rbio(SSL *ssl); BIO *SSL_get_wbio(SSL *ssl);
DESCRIPTIONSSL_get_rbio() and SSL_get_wbio() return pointers to the BIOs
for the read or the write channel, which can be different. The reference
count of the BIO is not incremented. RETURN VALUESThe following return values can occur: