@deftypefun {int} {gnutls_x509_ext_import_tlsfeatures} (const gnutls_datum_t * @var{ext}, gnutls_x509_tlsfeatures_t @var{f}, unsigned int @var{flags})
@var{ext}: The DER-encoded extension data

@var{f}: The features structure

@var{flags}: zero or @code{GNUTLS_EXT_FLAG_APPEND} 

This function will export the features in the provided DER-encoded
TLS Features PKIX extension, to a @code{gnutls_x509_tlsfeatures_t}  type.  @code{f} must be initialized.

When the  @code{flags} is set to @code{GNUTLS_EXT_FLAG_APPEND} ,
then if the  @code{features} structure is empty this function will behave
identically as if the flag was not set. Otherwise if there are elements 
in the  @code{features} structure then they will be merged with.

@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS}  (0) is returned, otherwise a negative error value.

@strong{Since:} 3.5.1
@end deftypefun