1SSL_GET_FD(3)                       OpenSSL                      SSL_GET_FD(3)
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NAME

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

10        #include <openssl/ssl.h>
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12        int SSL_get_fd(const SSL *ssl);
13        int SSL_get_rfd(const SSL *ssl);
14        int SSL_get_wfd(const SSL *ssl);
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DESCRIPTION

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

24       The following return values can occur:
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26       -1  The operation failed, because the underlying BIO is not of the
27           correct type (suitable for file descriptors).
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29       >=0 The file descriptor linked to ssl.
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SEE ALSO

32       SSL_set_fd(3), ssl(7) , bio(7)
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35       Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
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37       Licensed under the OpenSSL license (the "License").  You may not use
38       this file except in compliance with the License.  You can obtain a copy
39       in the file LICENSE in the source distribution or at
40       <https://www.openssl.org/source/license.html>.
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441.1.1k                            2021-03-26                     SSL_GET_FD(3)
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