#include <openssl/bio.h> const BIO_METHOD *BIO_s_socket(void); BIO *BIO_new_socket(int sock, int close_flag);
BIO_read_ex() and BIO_write_ex() read or write the underlying socket. BIO_puts() is supported but BIO_gets() is not.
If the close flag is set then the socket is shut down and closed when the BIO is freed.
The reason for having separate file descriptor and socket BIOs is that on some platforms sockets are not file descriptors and use distinct I/O routines, Windows is one such platform. Any code mixing the two will not work on all platforms.
Licensed under the OpenSSL license (the ``License''). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.