SSL_get_fd.3ossl - Man Page

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.

Return Values

The following return values can occur:


The operation failed, because the underlying BIO is not of the correct type (suitable for file descriptors).


The file descriptor linked to ssl.

See Also

SSL_set_fd(3), ssl(7) , bio(7)

Referenced By


The man pages SSL_get_rfd.3ossl(3) and SSL_get_wfd.3ossl(3) are aliases of SSL_get_fd.3ossl(3).

2023-10-26 3.1.4 OpenSSL