/*
   *	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)

  /* Minimum DHCP Options size per RFC2131 - results in 576 byte pkt */

  #define OPT_FIELD_SIZE 312

  #if defined(CONFIG_BOOTP_VENDOREX)
  extern u8 *dhcp_vendorex_prep(u8 *e); /*rtn new e after add own opts. */
  extern u8 *dhcp_vendorex_proc(u8 *e); /*rtn next e if mine,else NULL  */
  #endif

  #else

  #define OPT_FIELD_SIZE 64

  #endif

  struct bootp_hdr {

  	u8		bp_op;		/* Operation			*/

  # define OP_BOOTREQUEST	1
  # define OP_BOOTREPLY	2

  	u8		bp_htype;	/* Hardware type		*/

  # define HWT_ETHER	1

  	u8		bp_hlen;	/* Hardware address length	*/

  # define HWL_ETHER	6

  	u8		bp_hops;	/* Hop count (gateway thing)	*/

  	u32		bp_id;		/* Transaction ID		*/

  	u16		bp_secs;	/* Seconds since boot		*/
  	u16		bp_spare1;	/* Alignment			*/

  	struct in_addr	bp_ciaddr;	/* Client IP address		*/
  	struct in_addr	bp_yiaddr;	/* Your (client) IP address	*/
  	struct in_addr	bp_siaddr;	/* Server IP address		*/
  	struct in_addr	bp_giaddr;	/* Gateway IP address		*/

  	u8		bp_chaddr[16];	/* Client hardware address	*/

  	char		bp_sname[64];	/* Server host name		*/
  	char		bp_file[128];	/* Boot file name		*/

  	char		bp_vend[OPT_FIELD_SIZE]; /* Vendor information	*/

  } __attribute__((packed));

  #define BOOTP_HDR_SIZE	sizeof(struct bootp_hdr)

  
  /**********************************************************************/
  /*
   *	Global functions and variables.
   */
  
  /* bootp.c */

  extern u32	bootp_id;		/* ID of cur BOOTP request	*/

  extern int	bootp_try;

  
  
  /* Send a BOOTP request */

  void bootp_reset(void);
  void bootp_request(void);

  
  /****************** DHCP Support *********************/

  void dhcp_request(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

  /**********************************************************************/
  
  #endif /* __BOOTP_H__ */