@deftypefun {ssize_t} {gnutls_record_send_range} (gnutls_session_t @var{session}, const void * @var{data}, size_t @var{data_size}, const gnutls_range_st * @var{range})
@var{session}: is a @code{gnutls_session_t}  type.

@var{data}: contains the data to send.

@var{data_size}: is the length of the data.

@var{range}: is the range of lengths in which the real data length must be hidden.

This function operates like @code{gnutls_record_send()}  but, while
@code{gnutls_record_send()}  adds minimal padding to each TLS record,
this function uses the TLS extra-padding feature to conceal the real
data size within the range of lengths provided.
Some TLS sessions do not support extra padding (e.g. stream ciphers in standard
TLS or SSL3 sessions). To know whether the current session supports extra
padding, and hence length hiding, use the @code{gnutls_record_can_use_length_hiding()} 
function.

@strong{Note:} This function currently is limited to blocking sockets.

@strong{Returns:} The number of bytes sent (that is data_size in a successful invocation),
or a negative error code.
@end deftypefun