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 (CONFIG_COMMANDS & CFG_CMD_DHCP)
  22 #define OPT_SIZE 312    /* Minimum DHCP Options size per RFC2131 - results in 576 byte pkt */
  23 #else
  24 #define OPT_SIZE 64
  25 #endif
  26
  27 typedef struct
  28 {
  29         uchar           bp_op;          /* Operation                            */
  30 # define OP_BOOTREQUEST 1
  31 # define OP_BOOTREPLY   2
  32         uchar           bp_htype;       /* Hardware type                        */
  33 # define HWT_ETHER      1
  34         uchar           bp_hlen;        /* Hardware address length              */
  35 # define HWL_ETHER      6
  36         uchar           bp_hops;        /* Hop count (gateway thing)            */
  37         ulong           bp_id;          /* Transaction ID                       */
  38         ushort          bp_secs;        /* Seconds since boot                   */
  39         ushort          bp_spare1;      /* Alignment                            */
  40         IPaddr_t        bp_ciaddr;      /* Client IP address                    */
  41         IPaddr_t        bp_yiaddr;      /* Your (client) IP address             */
  42         IPaddr_t        bp_siaddr;      /* Server IP address                    */
  43         IPaddr_t        bp_giaddr;      /* Gateway IP address                   */
  44         uchar           bp_chaddr[16];  /* Client hardware address              */
  45         char            bp_sname[64];   /* Server host name                     */
  46         char            bp_file[128];   /* Boot file name                       */
  47         char            bp_vend[OPT_SIZE];      /* Vendor information                   */
  48 }       Bootp_t;
  49
  50 #define BOOTP_HDR_SIZE  sizeof (Bootp_t)
  51 #define BOOTP_SIZE      (ETHER_HDR_SIZE + IP_HDR_SIZE + BOOTP_HDR_SIZE)
  52
  53 /**********************************************************************/
  54 /*
  55  *      Global functions and variables.
  56  */
  57
  58 /* bootp.c */
  59 extern ulong    BootpID;                /* ID of cur BOOTP request              */
  60 extern char     BootFile[128];          /* Boot file name                       */
  61 extern int      BootpTry;
  62 #ifdef CONFIG_BOOTP_RANDOM_DELAY
  63 ulong           seed1, seed2;           /* seed for random BOOTP delay          */
  64 #endif
  65
  66
  67 /* Send a BOOTP request */
  68 extern void     BootpRequest (void);
  69
  70 /****************** DHCP Support *********************/
  71 extern void DhcpRequest(void);
  72
  73 /* DHCP States */
  74 typedef enum { INIT,
  75                INIT_REBOOT,
  76                REBOOTING,
  77                SELECTING,
  78                REQUESTING,
  79                REBINDING,
  80                BOUND,
  81                RENEWING } dhcp_state_t;
  82
  83 #define DHCP_DISCOVER 1
  84 #define DHCP_OFFER    2
  85 #define DHCP_REQUEST  3
  86 #define DHCP_DECLINE  4
  87 #define DHCP_ACK      5
  88 #define DHCP_NAK      6
  89 #define DHCP_RELEASE  7
  90
  91 #define SELECT_TIMEOUT 3        /* Seconds to wait for offers */
  92
  93 /**********************************************************************/
  94
  95 #endif /* __BOOTP_H__ */