sys/arch/mvme68k/stand/sboot/etherfun.h

   1 /*      $NetBSD: etherfun.h,v 1.3 2006/05/20 20:37:15 mrg Exp $ */
   2
   3 /*
   4  *
   5  * Copyright (c) 1995 Charles D. Cranor and Seth Widoff
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by Charles D. Cranor
  19  *      and Seth Widoff.
  20  * 4. The name of the author may not be used to endorse or promote products
  21  *    derived from this software without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34 /* etherfun.h */
  35
  36 /* constants */
  37 /* ether header */
  38 #define ETYPE_RARP 0x8035  /* ethertype is RARP */
  39 #define ETYPE_IP   0x800   /* ethertype is IP   */
  40
  41 /* rev arp */
  42 #define PTYPE_IP 0x800     /* Protocol type is IP      */
  43 #define OPCODE_RARP 3      /* Optype is REVARP request */
  44 #define OPCODE_REPLY 4     /* Optype is REVARP reply   */
  45
  46 /* ip header */
  47 #define  IPP_UDP 17        /* IP Protocol is UDP       */
  48 #define  IP_VERSION 4      /* IP version number        */
  49 #define  IP_HLEN 5         /* IP header length is a fixed 50 bytes */
  50 #define N 1536
  51
  52 /* tftp header */
  53 #define FTPOP_ACKN 4      /* Opcode is acknowledge     */
  54 #define FTPOP_ERR 5       /* Opcode is Error           */
  55 #define FTP_PORT 69       /* Standard TFTP port number */
  56 #define MSG "\0\1xxxxxxxx.147\0octet\0" /* implicit NULL */
  57
  58 /* data structures */
  59
  60 struct  ether_header {
  61         u_char  ether_dhost[6];
  62         u_char  ether_shost[6];
  63         u_short ether_type;
  64 };
  65
  66 struct  ether_arp {
  67         u_short ar_hrd;         /* format of hardware address */
  68         u_short ar_pro;         /* format of protocol address */
  69         u_char  ar_hln;         /* length of hardware address */
  70         u_char  ar_pln;         /* length of protocol address */
  71         u_short ar_op;
  72         u_char  arp_sha[6];     /* sender hardware address */
  73         u_char  arp_spa[4];     /* sender protocol address */
  74         u_char  arp_tha[6];     /* target hardware address */
  75         u_char  arp_tpa[4];     /* target protocol address */
  76 };
  77
  78 struct ip {
  79         u_char  ip_v:4,                 /* version */
  80                 ip_hl:4;                /* header length */
  81         u_char  ip_tos;                 /* type of service */
  82         short   ip_len;                 /* total length */
  83         u_short ip_id;                  /* identification */
  84         short   ip_off;                 /* fragment offset field */
  85 #define IP_DF 0x4000                    /* dont fragment flag */
  86 #define IP_MF 0x2000                    /* more fragments flag */
  87 #define IP_OFFMASK 0x1fff               /* mask for fragmenting bits */
  88         u_char  ip_ttl;                 /* time to live */
  89         u_char  ip_p;                   /* protocol */
  90         u_short ip_sum;                 /* checksum */
  91         u_char  ip_src[4];
  92         u_char  ip_dst[4];              /* source and dest address */
  93 };
  94
  95 struct udp {
  96         u_short uh_sport;
  97         u_short uh_dport;
  98         short uh_ulen;
  99         u_short uh_sum;
 100 };
 101
 102 struct tftph {
 103         u_short op_code;
 104         u_short block;
 105 };
 106
 107 struct tftphr {
 108         struct tftph info;
 109         char data[1];
 110 };
 111
 112 /* globals */
 113 int last_ack;
 114 u_char buf[N];
 115 struct ether_header *eh = (struct ether_header *)buf;
 116 struct ether_arp *rarp =
 117     (struct ether_arp *)(buf + sizeof(struct ether_header));
 118 struct ip *iph = (struct ip *)(buf + sizeof(struct ether_header));
 119 struct udp *udph = (struct udp *)(buf + sizeof(struct ether_header) +
 120     sizeof(struct ip));
 121 u_char *tftp_r = buf + sizeof(struct ether_header) + sizeof(struct ip) +
 122     sizeof(struct udp);
 123 struct tftph *tftp_a = (struct tftph *)(buf + sizeof(struct ether_header) +
 124     sizeof(struct ip) + sizeof(struct udp));
 125 struct tftphr *tftp = (struct tftphr *)(buf + sizeof(struct ether_header) +
 126     sizeof(struct ip) + sizeof(struct udp));