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    /*
     *	Copied from LiMon - BOOTP.
     *
     *	Copyright 1994, 1995, 2000 Neil Russell.
     *	(See License)
     *	Copyright 2000 Paolo Scaffardi
     */
    
    #ifndef __BOOTP_H__
    #define __BOOTP_H__
    
    #ifndef __NET_H__
    #include	<net.h>
    #endif /* __NET_H__ */
    
    /**********************************************************************/
    
    /*
     *	BOOTP header.
     */
    
    #if defined(CONFIG_CMD_DHCP)
    
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    #define OPT_SIZE 312	/* Minimum DHCP Options size per RFC2131 - results in 576 byte pkt */
    #else
    #define OPT_SIZE 64
    #endif
    
    typedef struct
    {
    	uchar		bp_op;		/* Operation				*/
    # define OP_BOOTREQUEST	1
    # define OP_BOOTREPLY	2
    	uchar		bp_htype;	/* Hardware type			*/
    # define HWT_ETHER	1
    	uchar		bp_hlen;	/* Hardware address length		*/
    # define HWL_ETHER	6
    	uchar		bp_hops;	/* Hop count (gateway thing)		*/
    	ulong		bp_id;		/* Transaction ID			*/
    	ushort		bp_secs;	/* Seconds since boot			*/
    	ushort		bp_spare1;	/* Alignment				*/
    	IPaddr_t	bp_ciaddr;	/* Client IP address			*/
    	IPaddr_t	bp_yiaddr;	/* Your (client) IP address		*/
    	IPaddr_t	bp_siaddr;	/* Server IP address			*/
    	IPaddr_t	bp_giaddr;	/* Gateway IP address			*/
    	uchar		bp_chaddr[16];	/* Client hardware address		*/
    	char		bp_sname[64];	/* Server host name			*/
    	char		bp_file[128];	/* Boot file name			*/
    	char		bp_vend[OPT_SIZE];	/* Vendor information			*/
    }	Bootp_t;
    
    #define BOOTP_HDR_SIZE	sizeof (Bootp_t)
    #define BOOTP_SIZE	(ETHER_HDR_SIZE + IP_HDR_SIZE + BOOTP_HDR_SIZE)
    
    /**********************************************************************/
    /*
     *	Global functions and variables.
     */
    
    /* bootp.c */
    extern ulong	BootpID;		/* ID of cur BOOTP request		*/
    extern char	BootFile[128];		/* Boot file name			*/
    extern int	BootpTry;
    #ifdef CONFIG_BOOTP_RANDOM_DELAY
    
    extern ulong	seed1, seed2;		/* seed for random BOOTP delay		*/
    
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    #endif
    
    
    /* Send a BOOTP request */
    extern void	BootpRequest (void);
    
    /****************** DHCP Support *********************/
    extern void DhcpRequest(void);
    
    /* DHCP States */
    typedef enum { INIT,
    	       INIT_REBOOT,
    	       REBOOTING,
    	       SELECTING,
    	       REQUESTING,
    	       REBINDING,
    	       BOUND,
    	       RENEWING } dhcp_state_t;
    
    #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 SELECT_TIMEOUT 3000UL	/* Milliseconds to wait for offers */
    
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    /**********************************************************************/
    
    #endif /* __BOOTP_H__ */