/*

 * Copyright (C) 2017 Red Hat, Inc.

 *

 * Author: Nikos Mavrogiannopoulos

 *

 * This file is part of GnuTLS.

 *

 * The GnuTLS is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public License

 * as published by the Free Software Foundation; either version 2.1 of

 * the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with this program.  If not, see <https://www.gnu.org/licenses/>

 *

 */

#ifndef GNUTLS_LIB_HELLO_EXT_LIB_H

#define GNUTLS_LIB_HELLO_EXT_LIB_H

#include <gnutls/gnutls.h>

#include "hello_ext.h"

/* Functions to use at the send() or recv() extension function to temporarily

 * store and retrieve data related to the extension.

 */

int

_gnutls_hello_ext_set_datum(gnutls_session_t session,

			    extensions_t id, const gnutls_datum_t *data);

int

_gnutls_hello_ext_get_datum(gnutls_session_t session,

			    extensions_t id, gnutls_datum_t *data /* constant contents */);

int

_gnutls_hello_ext_get_resumed_datum(gnutls_session_t session,

				    extensions_t id, gnutls_datum_t *data /* constant contents */);

/* clear up any set data for the extension */

#if 0 /* defined in hello_ext.h */

void

_gnutls_hello_ext_unset_priv(gnutls_session_t session,

                              extensions_t id);

#endif

/* Function that will deinitialize the temporal data. Must be set

 * as the deinit_func in the hello_ext_entry_st if the functions above

 * are used.

 */

void _gnutls_hello_ext_default_deinit(gnutls_ext_priv_data_t priv);

/* Functions to pack and unpack data if they need to be stored at

 * session resumption data. Must be set as the pack_func and unpack_func

 * of hello_ext_entry_st if the set and get functions above are used,

 * and data must be accessible on resumed sessions.

 */

int

_gnutls_hello_ext_default_pack(gnutls_ext_priv_data_t epriv, gnutls_buffer_st *ps);

int

_gnutls_hello_ext_default_unpack(gnutls_buffer_st *ps, gnutls_ext_priv_data_t *epriv);

#endif /* GNUTLS_LIB_HELLO_EXT_LIB_H */