/*
 * Copyright (C) 2000-2012 Free Software Foundation, 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 3 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 <http://www.gnu.org/licenses/>
 *
 */

#ifndef HANDSHAKE_H
#define HANDSHAKE_H

int _gnutls_send_handshake (gnutls_session_t session, mbuffer_st * bufel,
                            gnutls_handshake_description_t type);
int _gnutls_recv_hello_request (gnutls_session_t session, void *data,
                                uint32_t data_size);
int _gnutls_send_hello (gnutls_session_t session, int again);
int _gnutls_recv_hello (gnutls_session_t session, uint8_t * data, int datalen);
int _gnutls_recv_handshake (gnutls_session_t session, 
                        gnutls_handshake_description_t type,
                        unsigned int optional, gnutls_buffer_st* buf);
int _gnutls_generate_session_id (uint8_t * session_id, uint8_t * len);
int _gnutls_handshake_common (gnutls_session_t session);
int _gnutls_handshake_client (gnutls_session_t session);
int _gnutls_handshake_server (gnutls_session_t session);
void _gnutls_set_server_random (gnutls_session_t session, uint8_t * rnd);
void _gnutls_set_client_random (gnutls_session_t session, uint8_t * rnd);
int _gnutls_tls_create_random (uint8_t * dst);

int _gnutls_find_pk_algos_in_ciphersuites (uint8_t * data, int datalen);
int _gnutls_server_select_suite (gnutls_session_t session, uint8_t * data,
                                 unsigned int datalen);

int _gnutls_negotiate_version (gnutls_session_t session,
                               gnutls_protocol_t adv_version);
int _gnutls_user_hello_func (gnutls_session_t session,
                             gnutls_protocol_t adv_version);

void _gnutls_handshake_hash_buffers_clear (gnutls_session_t session);

#define STATE session->internals.handshake_state
/* This returns true if we have got there
 * before (and not finished due to an interrupt).
 */
#define AGAIN(target) (STATE==target?1:0)
#define AGAIN2(state, target) (state==target?1:0)

#endif