#ifndef _DHCP_H_
#define _DHCP_H_


#include "71x_map.h"

/* DHCP state machine. */
#define	STATE_DHCP_DISCOVER		1
#define	STATE_DHCP_REQUEST		2
#define	STATE_DHCP_LEASED			3
#define	STATE_DHCP_REREQUEST		4
#define	STATE_DHCP_RELEASE			5

#define	MAX_DHCP_RETRY			2
#define	DHCP_WAIT_TIME				10
#define	DHCP_WAIT_TIME1			20

#define DHCP_FLAGSBROADCAST	0x0080

/* UDP port numbers for DHCP */
#define	DHCP_SERVER_PORT	67	/* from server to client */
#define DHCP_CLIENT_PORT	68	/* from client to server */

/* DHCP message OP code */
#define DHCP_BOOTREQUEST	1
#define DHCP_BOOTREPLY		2

/* DHCP message type */
#define	DHCP_DISCOVER		1
#define DHCP_OFFER			2
#define	DHCP_REQUEST		3
#define	DHCP_DECLINE		4
#define	DHCP_ACK			5
#define DHCP_NAK			6
#define	DHCP_RELEASE		7
#define DHCP_INFORM			8

/* DHCP RETRANSMISSION TIMEOUT (microseconds) */
#define DHCP_INITIAL_RTO		( 4*1000000)
#define DHCP_MAX_RTO		(64*1000000)

#define DHCP_HTYPE10MB			1
#define DHCP_HTYPE100MB		2

#define DHCP_HLENETHERNET		6
#define DHCP_HOPS				0
#define DHCP_SECS				0

#define MAGIC_COOKIE		0x63825363

#define DEFAULT_LEASETIME	0xffffffff	/* infinite lease time */


#define OPT_SIZE	312
#define RIP_MSG_SIZE	(236+OPT_SIZE)

/* DHCP option and value (cf. RFC1533) */
enum
{
	padOption		=	0,
	subnetMask		=	1,
	timerOffset		=	2,
	routersOnSubnet	=	3,
	timeServer		=	4,
	nameServer		=	5,
	dns				=	6,
	logServer		=	7,
	cookieServer	=	8,
	lprServer		=	9,
	impressServer	=	10,
	resourceLocationServer	=	11,
	hostName		=	12,
	bootFileSize	=	13,
	meritDumpFile	=	14,
	domainName		=	15,
	swapServer		=	16,
	rootPath		=	17,
	extentionsPath	=	18,
	IPforwarding	=	19,
	nonLocalSourceRouting	=	20,
	policyFilter		=	21,
	maxDgramReasmSize	=	22,
	defaultIPTTL		=	23,
	pathMTUagingTimeout	=	24,
	pathMTUplateauTable	=	25,
	ifMTU				=	26,
	allSubnetsLocal		=	27,
	broadcastAddr		=	28,
	performMaskDiscovery	=	29,
	maskSupplier		=	30,
	performRouterDiscovery	=	31,
	routerSolicitationAddr	=	32,
	staticRoute			=	33,
	trailerEncapsulation	=	34,
	arpCacheTimeout		=	35,
	ethernetEncapsulation	=	36,
	tcpDefaultTTL		=	37,
	tcpKeepaliveInterval	=	38,
	tcpKeepaliveGarbage	=	39,
	nisDomainName		=	40,
	nisServers			=	41,
	ntpServers			=	42,
	vendorSpecificInfo	=	43,
	netBIOSnameServer	=	44,
	netBIOSdgramDistServer	=	45,
	netBIOSnodeType		=	46,
	netBIOSscope		=	47,
	xFontServer			=	48,
	xDisplayManager		=	49,
	dhcpRequestedIPaddr	=	50,
	dhcpIPaddrLeaseTime	=	51,
	dhcpOptionOverload	=	52,
	dhcpMessageType		=	53,
	dhcpServerIdentifier	=	54,
	dhcpParamRequest	=	55,
	dhcpMsg				=	56,
	dhcpMaxMsgSize		=	57,
	dhcpT1value			=	58,
	dhcpT2value			=	59,
	dhcpClassIdentifier	=	60,
	dhcpClientIdentifier	=	61,
	endOption			=	255
};

typedef struct {
	u8 op; 
	u8 htype; 
	u8 hlen;
	u8 hops;
	u32 xid;
	u16 secs;
	u16 flags;
	u8 ciaddr[4];
	u8 yiaddr[4];
	u8 siaddr[4];
	u8 giaddr[4];
	u8 chaddr[16];
	u8 sname[64];
	u8 file[128];
	u8 OPT[OPT_SIZE];
} RIP_MSG;

typedef union _un_l2cval {
	u32	lVal;
	u8	cVal[4];
}un_l2cval;



/*
********************************************************************************
Function Prototype Definition Part
********************************************************************************
*/
extern void send_DHCP_DISCOVER(u8 s);
extern void send_DHCP_REQUEST(u8 s, u8 *Cip, u8 *d_addr);
extern void send_DHCP_REREQUEST(u8 s);
extern void send_DHCP_RELEASE(u8 s);
extern void send_DHCP_DECLINE(u8 s);

extern unsigned char getIP_DHCPS(void);
extern void check_DHCP_state(void);
extern void check_Timeout(void);
extern char check_leasedIP(void);

extern char parseDHCPMSG(u8 s, u16 length);

#endif	/* _DHCP_H_ */