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

   1 /* $NetBSD: dev_net.c,v 1.6 2008/04/28 20:23:34 martin Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2007 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Tohru Nishimura.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/param.h>
  33
  34 #include <netinet/in.h>
  35 #include <netinet/in_systm.h>
  36
  37 #include <lib/libsa/stand.h>
  38 #include <lib/libsa/net.h>
  39 #include <lib/libsa/bootp.h>
  40 #include <lib/libsa/nfs.h>
  41
  42 #include <lib/libkern/libkern.h>
  43
  44 #include "globals.h"
  45
  46 static int netdev_sock = -1;
  47 static int netdev_opens;
  48
  49 int
  50 net_open(struct open_file *f, ...)
  51 {
  52         int error = 0;
  53
  54         if (netdev_opens == 0) {
  55                 if ((netdev_sock = netif_open(NULL)) < 0) {
  56                         error = errno;
  57                         goto bad;
  58                 }
  59
  60                 /* send DHCP request */
  61                 bootp(netdev_sock);
  62
  63                 /* IP address was not found */
  64                 if (myip.s_addr == 0) {
  65                         error = ENOENT;
  66                         goto bad;
  67                 }
  68
  69                 /* XXX always to use "netbsd" kernel filename */
  70                 strcpy(bootfile, "/netbsd");
  71
  72                 if (nfs_mount(netdev_sock, rootip, rootpath) != 0) {
  73                         error = errno;
  74                         goto bad;
  75                 }
  76         }
  77         netdev_opens++;
  78 bad:
  79         return (error);
  80 }
  81
  82 int
  83 net_close(struct open_file *f)
  84
  85 {
  86         if (--netdev_opens > 0)
  87                 return (0);
  88         netif_close(netdev_sock);
  89         netdev_sock = -1;
  90         return (0);
  91 }
  92
  93 int
  94 net_strategy(void *d, int f, daddr_t b, size_t s, void *buf, size_t *r)
  95 {
  96
  97         return (EIO);
  98 }