net/bootp.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *      Copied from LiMon - BOOTP.
   4  *
   5  *      Copyright 1994, 1995, 2000 Neil Russell.
   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 #else
  28 #define OPT_FIELD_SIZE 64
  29 #endif
  30
  31 struct bootp_hdr {
  32         u8              bp_op;          /* Operation                    */
  33 # define OP_BOOTREQUEST 1
  34 # define OP_BOOTREPLY   2
  35         u8              bp_htype;       /* Hardware type                */
  36 # define HWT_ETHER      1
  37         u8              bp_hlen;        /* Hardware address length      */
  38 # define HWL_ETHER      6
  39         u8              bp_hops;        /* Hop count (gateway thing)    */
  40         u32             bp_id;          /* Transaction ID               */
  41         u16             bp_secs;        /* Seconds since boot           */
  42         u16             bp_spare1;      /* Alignment                    */
  43         struct in_addr  bp_ciaddr;      /* Client IP address            */
  44         struct in_addr  bp_yiaddr;      /* Your (client) IP address     */
  45         struct in_addr  bp_siaddr;      /* Server IP address            */
  46         struct in_addr  bp_giaddr;      /* Gateway IP address           */
  47         u8              bp_chaddr[16];  /* Client hardware address      */
  48         char            bp_sname[64];   /* Server host name             */
  49         char            bp_file[128];   /* Boot file name               */
  50         char            bp_vend[OPT_FIELD_SIZE]; /* Vendor information  */
  51 } __attribute__((packed));
  52
  53 #define BOOTP_HDR_SIZE  sizeof(struct bootp_hdr)
  54
  55 /**********************************************************************/
  56 /*
  57  *      Global functions and variables.
  58  */
  59
  60 /* bootp.c */
  61 extern u32      bootp_id;               /* ID of cur BOOTP request      */
  62 extern int      bootp_try;
  63
  64 /* Send a BOOTP request */
  65 void bootp_reset(void);
  66 void bootp_request(void);
  67
  68 /****************** DHCP Support *********************/
  69 void dhcp_request(void);
  70
  71 /* DHCP States */
  72 typedef enum { INIT,
  73                INIT_REBOOT,
  74                REBOOTING,
  75                SELECTING,
  76                REQUESTING,
  77                REBINDING,
  78                BOUND,
  79                RENEWING } dhcp_state_t;
  80
  81 #define DHCP_DISCOVER 1
  82 #define DHCP_OFFER    2
  83 #define DHCP_REQUEST  3
  84 #define DHCP_DECLINE  4
  85 #define DHCP_ACK      5
  86 #define DHCP_NAK      6
  87 #define DHCP_RELEASE  7
  88
  89 #define DHCP_OPTION_PXE_CONFIG_FILE     209     /* "ConfigFile" option according to rfc5071 */
  90
  91 /**********************************************************************/
  92
  93 #endif /* __BOOTP_H__ */