SSL_get_fd(3)

NAME
SSL_get_fd - 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
SSL_set_fd(3), ssl(3) , bio(3)