NAME

       gnutls_record_recv_early_data - API function

SYNOPSIS

       #include <gnutls/gnutls.h>

       ssize_t   gnutls_record_recv_early_data(gnutls_session_t  session,  void  *  data,  size_t
       data_size);

ARGUMENTS

       gnutls_session_t session
                   is a gnutls_session_t type.

       void * data the buffer that the data will be read into

       size_t data_size
                   the number of requested bytes

DESCRIPTION

       This function can be used by a server  to  retrieve  data  sent  early  in  the  handshake
       processes  when  resuming  a  session.  This is used to implement a zero-roundtrip (0-RTT)
       mode.  It has the same semantics as gnutls_record_recv().

       This function can be called either  in  a  handshake  hook,  or  after  the  handshake  is
       complete.

RETURNS

       The  number  of  bytes  received and zero when early data reading is complete.  A negative
       error code is returned in case of an error.  If no  early  data  is  received  during  the
       handshake,  this  function  returns  GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE.  The number of
       bytes received might be less than the requested
        data_size .

SINCE

       3.6.5

REPORTING BUGS

       Report bugs to <bugs@gnutls.org>.
       Home page: https://www.gnutls.org

COPYRIGHT

       Copyright © 2001- Free Software Foundation, Inc., and others.
       Copying and distribution of this file, with or without modification, are permitted in  any
       medium without royalty provided the copyright notice and this notice are preserved.

SEE ALSO

       The   full   documentation  for  gnutls  is  maintained  as  a  Texinfo  manual.   If  the
       /usr/share/doc/gnutls/ directory does not contain the HTML form visit

       https://www.gnutls.org/manual/