libressl-SSL_get_fd3
Get file descriptor linked to an ssl object
Usage
SSL Library (libssl, -lssl) libcrypto
#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);
Overview
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.