// -------------------------------------------------------------------------
// ipv4.h
//
// 21.12.2003, J. Ahrensfeld
//
// -------------------------------------------------------------------------
#ifndef DHCP_H
#define DHCP_H

#include <libsys/libsys.h>
#include "ethernet.h"

// -------------------------------------------------------------------------
typedef uint8_t dhcp_sname_t[64];
typedef uint8_t dhcp_file_t[128];
typedef uint8_t dhcp_option_t[312];

typedef struct _sDHCP
{
	uint8_t op, htype, hlen, hops;
	uint32_t xid;
	uint16_t secs, flags;
	uint8_t ciaddr[4];
	uint8_t yiaddr[4];
	uint8_t siaddr[4];
	uint8_t giaddr[4];
	uint8_t chaddr[16];
	dhcp_sname_t sname;
	dhcp_file_t file;
	dhcp_option_t options;

} __attribute__ ((__packed__)) DHCP;

#define DHCP_MAGIC_COOKIE		0x63825363

#define	DHCP_BOOTREQUEST		1		// request.
#define	DHCP_BOOTREPLY			2 		// reply.

typedef struct _sdhcp_opt_hdr_t
{
	uint8_t code;
	uint8_t size;

} __attribute__ ((__packed__)) dhcp_opt_hdr_t;

typedef struct _soption_list_t
{
	size_t capacity;
	size_t size;
	uint8_t *buffer;
	uint8_t *pData;
} option_list_t;

#define DHCP_FLAGS_BROADCAST	0x8000

#define	DHCP_OPT_HOSTNAME		12
#define	DHCP_OPT_REQIP			50
#define	DHCP_OPT_MSGTYPE		53
#define	DHCP_OPT_SERVERID		54
#define	DHCP_OPT_CLIENTID		61
#define	DHCP_OPT_END			255

#define	DHCP_MSG_DHCPDISCOVER	1
#define	DHCP_MSG_DHCPOFFER		2
#define	DHCP_MSG_DHCPREQUEST	3
#define	DHCP_MSG_DHCPDECLINE	4
#define	DHCP_MSG_DHCPACK		5
#define	DHCP_MSG_DHCPNAK		6
#define	DHCP_MSG_DHCPRELEASE	7

// -------------------------------------------------------------------------
void DHCP_request_send(packet_t *pPacket, uint8_t dhcp_msg_type, uint8_t *mac_addr_src, uint8_t *inet_addr_src, uint8_t *inet_addr_dst, DHCP *pLast);
void option_list_init(option_list_t *pObj, void *pBuffer, size_t size);
void option_list_append(option_list_t *pObj, uint8_t option_type, void const *pData, size_t size);
size_t data_entry_create(void *pDst, uint8_t type, void const *pData, size_t size);

// -------------------------------------------------------------------------
#endif // DHCP_H