SSL_GET_FD(3) BSD Library Functions Manual SSL_GET_FD(3)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);
DESCRIPTIONSSL_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 ALSObio(3), ssl(3), SSL_set_fd(3)BSD June 1, 2024 BSD