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 Apache License 2.0 (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>.

3.0.13                                             2025-02-05                                   SSL_GET_FD(3SSL)