sys/arch/newsmips/stand/boot/net.c

   1 /*      $NetBSD: net.c,v 1.4 2005/12/11 12:18:25 christos Exp $ */
   2
   3 /*
   4  * Copyright (c) 1995 Gordon W. Ross
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 /*
  29  * This module implements a "raw device" interface suitable for
  30  * use by the stand-alone I/O library NFS code.  This interface
  31  * does not support any "block" access, and exists only for the
  32  * purpose of initializing the network interface, getting boot
  33  * parameters, and performing the NFS mount.
  34  *
  35  * At open time, this does:
  36  *
  37  * find interface      - netif_open()
  38  * RARP for IP address - rarp_getipaddress()
  39  * RPC/bootparams      - callrpc(d, RPC_BOOTPARAMS, ...)
  40  * RPC/mountd          - nfs_mount(sock, ip, path)
  41  *
  42  * the root file handle from mountd is saved in a global
  43  * for use by the NFS open code (NFS/lookup).
  44  */
  45
  46 #include <sys/param.h>
  47 #include <sys/socket.h>
  48 #include <net/if.h>
  49 #include <netinet/in.h>
  50 #include <netinet/in_systm.h>
  51
  52 #include <lib/libsa/stand.h>
  53 #include <lib/libsa/net.h>
  54 #include <lib/libsa/bootparam.h>
  55 #include <lib/libsa/nfs.h>
  56
  57 #include <lib/libkern/libkern.h>
  58
  59 #include <promdev.h>
  60
  61 #include "netif_news.h"
  62
  63 char rootpath[FNAME_SIZE];
  64
  65 int     netdev_sock = -1;
  66 static  int open_count;
  67
  68 /*
  69  * Called by devopen after it sets f->f_dev to our devsw entry.
  70  * This opens the low-level device and sets f->f_devdata.
  71  */
  72 int
  73 net_open(struct romdev *pd)
  74 {
  75         int error = 0;
  76
  77         /* On first open, do netif open, mount, etc. */
  78         if (open_count == 0) {
  79                 /* Find network interface. */
  80                 if ((netdev_sock = netif_news_open(pd)) < 0) {
  81                         error = errno;
  82                         goto bad;
  83                 }
  84                 if ((error = net_mountroot()) != 0)
  85                         goto bad;
  86         }
  87         open_count++;
  88 bad:
  89         return error;
  90 }
  91
  92 int
  93 net_close(struct romdev *pd)
  94 {
  95         /* On last close, do netif close, etc. */
  96         if (open_count <= 0)
  97                 return 0;
  98
  99         if (--open_count == 0)
 100                 netif_news_close(netdev_sock);
 101
 102         return 0;
 103 }
 104
 105 int
 106 net_mountroot(void)
 107 {
 108
 109 #ifdef DEBUG
 110         printf("net_mountroot\n");
 111 #endif
 112
 113         /*
 114          * Get info for NFS boot: our IP address, our hostname,
 115          * server IP address, and our root path on the server.
 116          * There are two ways to do this:  The old, Sun way,
 117          * and the more modern, BOOTP way. (RFC951, RFC1048)
 118          */
 119
 120 #ifdef  SUN_BOOTPARAMS
 121         /* Get boot info using RARP and Sun bootparams. */
 122
 123         /* Get our IP address.  (rarp.c) */
 124         if (rarp_getipaddress(netdev_sock) == -1)
 125                 return (errno);
 126
 127         printf("boot: client IP address: %s\n", inet_ntoa(myip));
 128
 129         /* Get our hostname, server IP address. */
 130         if (bp_whoami(netdev_sock))
 131                 return (errno);
 132
 133         printf("boot: client name: %s\n", hostname);
 134
 135         /* Get the root pathname. */
 136         if (bp_getfile(netdev_sock, "root", &rootip, rootpath))
 137                 return (errno);
 138
 139 #else
 140
 141         /* Get boot info using BOOTP way. (RFC951, RFC1048) */
 142         bootp(netdev_sock);
 143
 144         printf("Using IP address: %s\n", inet_ntoa(myip));
 145
 146         printf("myip: %s (%s)", hostname, inet_ntoa(myip));
 147         if (gateip)
 148                 printf(", gateip: %s", inet_ntoa(gateip));
 149         if (netmask)
 150                 printf(", netmask: %s", intoa(netmask));
 151         printf("\n");
 152
 153 #endif
 154
 155         printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);
 156
 157         /* Get the NFS file handle (mount). */
 158         if (nfs_mount(netdev_sock, rootip, rootpath) != 0)
 159                 return (errno);
 160
 161         return 0;
 162 }