/* dhcpmsg.c - dhcp packet generation and sending functions
 * Time-stamp: <2011-03-30 23:53:52 nk>
 *
 * (c) 2004-2011 Nicholas J. Kain <njkain at gmail dot com>
 * (c) 2001 Russ Dill <Russ.Dill@asu.edu>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef DHCPMSG_H_
#define DHCPMSG_H_

#include <stdint.h>
#include "packet.h"

#define DHCP_SERVER_PORT        67
#define DHCP_CLIENT_PORT        68
#define DHCP_MAGIC              0x63825363

enum {
    DHCPDISCOVER = 1,
    DHCPOFFER    = 2,
    DHCPREQUEST  = 3,
    DHCPDECLINE  = 4,
    DHCPACK  = 5,
    DHCPNAK  = 6,
    DHCPRELEASE  = 7,
    DHCPINFORM   = 8
};

uint32_t random_xid(void);
int send_discover(uint32_t xid, uint32_t requested);
int send_selecting(uint32_t xid, uint32_t server, uint32_t requested);
int send_renew(uint32_t xid, uint32_t server, uint32_t ciaddr);
int send_renew(uint32_t xid, uint32_t server, uint32_t ciaddr);
int send_decline(uint32_t xid, uint32_t server, uint32_t requested);
int send_release(uint32_t server, uint32_t ciaddr);
int get_raw_packet(struct dhcpMessage *payload, int fd);

#endif