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bootloader/u-boot_2015_04/net/bootp.h 2.36 KB
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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)
  /* 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_t {
  	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_FIELD_SIZE]; /* Vendor information	*/
  };
  
  #define BOOTP_HDR_SIZE	sizeof(struct Bootp_t)
  
  /**********************************************************************/
  /*
   *	Global functions and variables.
   */
  
  /* bootp.c */
  extern ulong	BootpID;		/* ID of cur BOOTP request	*/
  extern char	BootFile[128];		/* Boot file name		*/
  extern int	BootpTry;
  
  
  /* Send a BOOTP request */
  extern void BootpReset(void);
  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
  
  /**********************************************************************/
  
  #endif /* __BOOTP_H__ */