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
HISTORY
SSL_get_fd() appeared in SSLeay 0.4 or
earlier and has been available since OpenBSD
2.4.
SSL_get_rfd() and
SSL_get_wfd() first appeared in OpenSSL 0.9.6c and
have been available since OpenBSD 3.2.