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_FIELD_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_FIELD_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_FIELD_SIZE]; /* Vendor information  */
  52 };
  53
  54 #define BOOTP_HDR_SIZE  sizeof(struct Bootp_t)
  55
  56 /**********************************************************************/
  57 /*
  58  *      Global functions and variables.
  59  */
  60
  61 /* bootp.c */
  62 extern ulong    BootpID;                /* ID of cur BOOTP request      */
  63 extern char     BootFile[128];          /* Boot file name               */
  64 extern int      BootpTry;
  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 3000UL   /* Milliseconds to wait for offers */
  92
  93 /**********************************************************************/
  94
  95 #endif /* __BOOTP_H__ */