net/bootp.h

   1 /*
   2  *      Copied from LiMon - BOOTP.
   3  *
   4  *      Copyright 1994, 1995, 2000 Neil Russell.
   5  *      (See License)
   6  *      Copyright 2000 Paolo Scaffardi
   7  */
   8
   9 #ifndef __BOOTP_H__
  10 #define __BOOTP_H__
  11
  12 #ifndef __NET_H__
  13 #include <net.h>
  14 #endif /* __NET_H__ */
  15
  16 /**********************************************************************/
  17
  18 /*
  19  *      BOOTP header.
  20  */
  21 #if defined(CONFIG_CMD_DHCP)
  22 /* Minimum DHCP Options size per RFC2131 - results in 576 byte pkt */
  23 #define OPT_SIZE 312
  24 #if defined(CONFIG_BOOTP_VENDOREX)
  25 extern u8 *dhcp_vendorex_prep(u8 *e); /*rtn new e after add own opts. */
  26 extern u8 *dhcp_vendorex_proc(u8 *e); /*rtn next e if mine,else NULL  */
  27 #endif
  28 #else
  29 #define OPT_SIZE 64
  30 #endif
  31
  32 struct Bootp_t {
  33         uchar           bp_op;          /* Operation                    */
  34 # define OP_BOOTREQUEST 1
  35 # define OP_BOOTREPLY   2
  36         uchar           bp_htype;       /* Hardware type                */
  37 # define HWT_ETHER      1
  38         uchar           bp_hlen;        /* Hardware address length      */
  39 # define HWL_ETHER      6
  40         uchar           bp_hops;        /* Hop count (gateway thing)    */
  41         ulong           bp_id;          /* Transaction ID               */
  42         ushort          bp_secs;        /* Seconds since boot           */
  43         ushort          bp_spare1;      /* Alignment                    */
  44         IPaddr_t        bp_ciaddr;      /* Client IP address            */
  45         IPaddr_t        bp_yiaddr;      /* Your (client) IP address     */
  46         IPaddr_t        bp_siaddr;      /* Server IP address            */
  47         IPaddr_t        bp_giaddr;      /* Gateway IP address           */
  48         uchar           bp_chaddr[16];  /* Client hardware address      */
  49         char            bp_sname[64];   /* Server host name             */
  50         char            bp_file[128];   /* Boot file name               */
  51         char            bp_vend[OPT_SIZE];      /* Vendor information   */
  52 };
  53
  54 #define BOOTP_HDR_SIZE  sizeof(struct Bootp_t)
  55 #define BOOTP_SIZE      (ETHER_HDR_SIZE + IP_HDR_SIZE + BOOTP_HDR_SIZE)
  56
  57 /**********************************************************************/
  58 /*
  59  *      Global functions and variables.
  60  */
  61
  62 /* bootp.c */
  63 extern ulong    BootpID;                /* ID of cur BOOTP request      */
  64 extern char     BootFile[128];          /* Boot file name               */
  65 extern int      BootpTry;
  66 #ifdef CONFIG_BOOTP_RANDOM_DELAY
  67 extern ulong    seed1, seed2;           /* seed for random BOOTP delay  */
  68 #endif
  69
  70
  71 /* Send a BOOTP request */
  72 extern void BootpRequest(void);
  73
  74 /****************** DHCP Support *********************/
  75 extern void DhcpRequest(void);
  76
  77 /* DHCP States */
  78 typedef enum { INIT,
  79                INIT_REBOOT,
  80                REBOOTING,
  81                SELECTING,
  82                REQUESTING,
  83                REBINDING,
  84                BOUND,
  85                RENEWING } dhcp_state_t;
  86
  87 #define DHCP_DISCOVER 1
  88 #define DHCP_OFFER    2
  89 #define DHCP_REQUEST  3
  90 #define DHCP_DECLINE  4
  91 #define DHCP_ACK      5
  92 #define DHCP_NAK      6
  93 #define DHCP_RELEASE  7
  94
  95 #define SELECT_TIMEOUT 3000UL   /* Milliseconds to wait for offers */
  96
  97 /**********************************************************************/
  98
  99 #endif /* __BOOTP_H__ */