@deftypefun {int} {gnutls_session_channel_binding} (gnutls_session_t @var{session}, gnutls_channel_binding_t @var{cbtype}, gnutls_datum_t * @var{cb})
@var{session}: is a @code{gnutls_session_t}  type.

@var{cbtype}: an @code{gnutls_channel_binding_t}  enumeration type

@var{cb}: output buffer array with data

Extract given channel binding data of the  @code{cbtype} (e.g.,
@code{GNUTLS_CB_TLS_UNIQUE} ) type.

@strong{Returns:} @code{GNUTLS_E_SUCCESS}  on success,
@code{GNUTLS_E_UNIMPLEMENTED_FEATURE}  if the  @code{cbtype} is unsupported,
@code{GNUTLS_E_CHANNEL_BINDING_NOT_AVAILABLE}  if the data is not
currently available, or an error code.

@strong{Since:} 2.12.0
@end deftypefun