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 #define PORT_BOOTPS     67              /* BOOTP server UDP port */
  19 #define PORT_BOOTPC     68              /* BOOTP client UDP port */
  20
  21 /*
  22  *      BOOTP header.
  23  */
  24 #if defined(CONFIG_CMD_DHCP)
  25 /* Minimum DHCP Options size per RFC2131 - results in 576 byte pkt */
  26 #define OPT_FIELD_SIZE 312
  27 #if defined(CONFIG_BOOTP_VENDOREX)
  28 extern u8 *dhcp_vendorex_prep(u8 *e); /*rtn new e after add own opts. */
  29 extern u8 *dhcp_vendorex_proc(u8 *e); /*rtn next e if mine,else NULL  */
  30 #endif
  31 #else
  32 #define OPT_FIELD_SIZE 64
  33 #endif
  34
  35 struct bootp_hdr {
  36         u8              bp_op;          /* Operation                    */
  37 # define OP_BOOTREQUEST 1
  38 # define OP_BOOTREPLY   2
  39         u8              bp_htype;       /* Hardware type                */
  40 # define HWT_ETHER      1
  41         u8              bp_hlen;        /* Hardware address length      */
  42 # define HWL_ETHER      6
  43         u8              bp_hops;        /* Hop count (gateway thing)    */
  44         u32             bp_id;          /* Transaction ID               */
  45         u16             bp_secs;        /* Seconds since boot           */
  46         u16             bp_spare1;      /* Alignment                    */
  47         struct in_addr  bp_ciaddr;      /* Client IP address            */
  48         struct in_addr  bp_yiaddr;      /* Your (client) IP address     */
  49         struct in_addr  bp_siaddr;      /* Server IP address            */
  50         struct in_addr  bp_giaddr;      /* Gateway IP address           */
  51         u8              bp_chaddr[16];  /* Client hardware address      */
  52         char            bp_sname[64];   /* Server host name             */
  53         char            bp_file[128];   /* Boot file name               */
  54         char            bp_vend[OPT_FIELD_SIZE]; /* Vendor information  */
  55 } __attribute__((packed));
  56
  57 #define BOOTP_HDR_SIZE  sizeof(struct bootp_hdr)
  58
  59 /**********************************************************************/
  60 /*
  61  *      Global functions and variables.
  62  */
  63
  64 /* bootp.c */
  65 extern u32      bootp_id;               /* ID of cur BOOTP request      */
  66 extern int      bootp_try;
  67
  68 /* Send a BOOTP request */
  69 void bootp_reset(void);
  70 void bootp_request(void);
  71
  72 /****************** DHCP Support *********************/
  73 void dhcp_request(void);
  74
  75 /* DHCP States */
  76 typedef enum { INIT,
  77                INIT_REBOOT,
  78                REBOOTING,
  79                SELECTING,
  80                REQUESTING,
  81                REBINDING,
  82                BOUND,
  83                RENEWING } dhcp_state_t;
  84
  85 #define DHCP_DISCOVER 1
  86 #define DHCP_OFFER    2
  87 #define DHCP_REQUEST  3
  88 #define DHCP_DECLINE  4
  89 #define DHCP_ACK      5
  90 #define DHCP_NAK      6
  91 #define DHCP_RELEASE  7
  92
  93 #define DHCP_OPTION_PXE_CONFIG_FILE     209     /* "ConfigFile" option according to rfc5071 */
  94
  95 /**********************************************************************/
  96
  97 #endif /* __BOOTP_H__ */