NAME

       SSL_get_fd, SSL_get_rfd, SSL_get_wfd - get file descriptor linked to an SSL object

SYNOPSIS

        #include <openssl/ssl.h>

        int SSL_get_fd(const SSL *ssl);
        int SSL_get_rfd(const SSL *ssl);
        int SSL_get_wfd(const SSL *ssl);

DESCRIPTION

       SSL_get_fd() returns the file descriptor which is linked to ssl.  SSL_get_rfd() and SSL_get_wfd() return
       the file descriptors for the read or the write channel, which can be different. If the read and the write
       channel are different, SSL_get_fd() will return the file descriptor of the read channel.

RETURN VALUES

       The following return values can occur:

       -1  The  operation  failed,  because  the  underlying  BIO  is not of the correct type (suitable for file
           descriptors).

       >=0 The file descriptor linked to ssl.

SEE ALSO

       SSL_set_fd(3), ssl(7) , bio(7)

COPYRIGHT

       Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.

       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>.

1.1.1f                                             2025-02-05                                   SSL_GET_FD(3SSL)