sys/arch/i386/stand/netboot/dev_net.c

   1 /*      $NetBSD: dev_net.c,v 1.14 2009/03/14 21:04:10 dsl Exp $  */
   2
   3 /*
   4  * Copyright (c) 1995 Gordon W. Ross
   5  * All rights reserved.
   6  * Copyright (c) 1996
   7  *      Matthias Drochner.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 /*
  31  * network device for libsa
  32  * supports BOOTP, RARP and BOOTPARAM
  33  */
  34
  35 #include <sys/types.h>
  36 #include <sys/socket.h>
  37 #include <net/if.h>
  38 #include <netinet/in.h>
  39 #include <netinet/in_systm.h>
  40
  41 #include <lib/libsa/stand.h>
  42 #include <lib/libsa/net.h>
  43 #include <lib/libsa/bootparam.h>
  44 #include <machine/stdarg.h>
  45
  46 #include <netif/netif_small.h>
  47
  48 #include <lib/libkern/libkern.h>
  49
  50 #include "dev_net.h"
  51
  52 #ifdef SUPPORT_BOOTP
  53 void bootp(int);
  54 #endif
  55
  56 static int      netdev_sock = -1;
  57
  58 /*
  59  * Called by devopen after it sets f->f_dev to our devsw entry.
  60  * This opens the low-level device and sets f->f_devdata.
  61  */
  62 int
  63 net_open(struct open_file *f, ...)
  64 {
  65         int error = 0;
  66
  67 #ifdef NET_DEBUG
  68         if (netdev_sock != -1)
  69             panic("net_open");
  70 #endif
  71
  72         /* Find network interface. */
  73         if ((netdev_sock = netif_open()) < 0)
  74                 return (ENXIO);
  75
  76 #ifdef SUPPORT_BOOTP
  77         printf("configure network...trying bootp\n");
  78         /* Get boot info using BOOTP way. (RFC951, RFC1048) */
  79         bootp(netdev_sock);
  80 #endif
  81
  82         if (myip.s_addr != INADDR_ANY) {        /* got bootp reply or
  83                                                          * manually set */
  84
  85 #ifdef TFTP_HACK
  86             int             num, i;
  87             /* XXX (some) tftp servers don't like leading "/" */
  88             for (num = 0; bootfile[num] == '/'; num++);
  89             for (i = 0; (bootfile[i] = bootfile[i + num]) != 0; i++);
  90 #endif
  91
  92             printf("boot: client IP address: %s\n",
  93                    inet_ntoa(myip));
  94             printf("boot: client name: %s\n", hostname);
  95         } else {
  96
  97 #ifdef SUPPORT_RARP
  98             /*
  99              * no answer, Get boot info using RARP and Sun
 100              * bootparams.
 101              */
 102             printf("configure network...trying rarp\n");
 103
 104             /* Get our IP address.  (rarp.c) */
 105             if (rarp_getipaddress(netdev_sock)) {
 106                 error = EIO;
 107                 goto bad;
 108             }
 109             printf("boot: client IP address: %s\n",
 110                    inet_ntoa(myip));
 111
 112 #ifdef SUPPORT_BOOTPARAM
 113             /* Get our hostname, server IP address. */
 114             if (!bp_whoami(netdev_sock)) {
 115                 printf("boot: client name: %s\n", hostname);
 116
 117                 /* Get the root pathname. */
 118                 bp_getfile(netdev_sock, "root", &rootip,
 119                            rootpath);
 120             }
 121 #else
 122             /*
 123              * else fallback: use rarp server address
 124              */
 125 #endif
 126
 127 #else                           /* no SUPPORT_RARP */
 128             error = EIO;
 129             goto bad;
 130 #endif
 131
 132         }
 133         printf("boot: server: %s, rootpath: %s, bootfile: %s\n",
 134                inet_ntoa(rootip), rootpath, bootfile);
 135
 136         f->f_devdata = &netdev_sock;
 137         return (error);
 138
 139 bad:
 140         printf("net_open failed\n");
 141         netif_close(netdev_sock);
 142         return (error);
 143 }
 144
 145 int
 146 net_close(struct open_file *f)
 147 {
 148 #ifdef NET_DEBUG
 149         if (netdev_sock == -1)
 150                 panic("net_close");
 151 #endif
 152
 153         netif_close(netdev_sock);
 154         netdev_sock = -1;
 155
 156         f->f_devdata = NULL;
 157
 158         return (0);
 159 }
 160
 161 int
 162 net_ioctl(struct open_file *f, u_long c, void *d)
 163 {
 164         return EIO;
 165 }
 166
 167 int
 168 net_strategy(void *d, int f, daddr_t b, size_t s, void *buf, size_t *r)
 169 {
 170         return EIO;
 171 }