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Annotation of sys/arch/mvme88k/stand/sboot/etherfun.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: etherfun.h,v 1.3 2006/05/16 22:52:26 miod 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.mvme68k\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: char buf[N];
                    115: struct ether_header *eh = (struct ether_header *)buf;
                    116: struct ether_arp *rarp = (struct ether_arp *)
                    117:        (buf + sizeof(struct ether_header));
                    118: struct ip *iph = (struct ip *)(buf + sizeof(struct ether_header));
                    119: struct udp *udph = (struct udp *)
                    120:        (buf + sizeof(struct ether_header) + sizeof(struct ip));
                    121: 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));