SSL_get_fd 3 2005-04-23 0.9.9-dev OpenSSL

### NAME

SSL_get_fd - get file descriptor linked to an SSL object

### LIBRARY

libcrypto, -lcrypto

### SYNOPSIS

     #include

     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) , openssl_bio(3)