SSL_get_fd(3)

SSL_get_fd(3)                OpenSSL                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)

1.0.2t               Last change: 2019-09-10                    1