SSL_get_fd, SSL_get_rfd, SSL_get_wfd - get file descriptor linked to an SSL
object
#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);
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.
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.
SSL_set_fd(3), ssl(7) , bio(7)
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>.