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net.c revision 1.2 
      1 /*	$NetBSD: net.c,v 1.2 2003/03/13 14:49:12 drochner 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  * 3. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission.
     17  * 4. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *      This product includes software developed by Gordon W. Ross
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 /*
     34  * This module implements a "raw device" interface suitable for
     35  * use by the stand-alone I/O library NFS code.  This interface
     36  * does not support any "block" access, and exists only for the
     37  * purpose of initializing the network interface, getting boot
     38  * parameters, and performing the NFS mount.
     39  *
     40  * At open time, this does:
     41  *
     42  * find interface      - netif_open()
     43  * RARP for IP address - rarp_getipaddress()
     44  * RPC/bootparams      - callrpc(d, RPC_BOOTPARAMS, ...)
     45  * RPC/mountd          - nfs_mount(sock, ip, path)
     46  *
     47  * the root file handle from mountd is saved in a global
     48  * for use by the NFS open code (NFS/lookup).
     49  */
     50 
     51 #include <sys/param.h>
     52 #include <sys/socket.h>
     53 #include <net/if.h>
     54 #include <netinet/in.h>
     55 #include <netinet/in_systm.h>
     56 
     57 #include <lib/libsa/stand.h>
     58 #include <lib/libsa/net.h>
     59 #include <lib/libsa/bootparam.h>
     60 #include <lib/libsa/nfs.h>
     61 
     62 #include <lib/libkern/libkern.h>
     63 
     64 #include <promdev.h>
     65 
     66 #include "netif_news.h"
     67 
     68 char rootpath[FNAME_SIZE];
     69 
     70 int	netdev_sock = -1;
     71 static	int open_count;
     72 
     73 /*
     74  * Called by devopen after it sets f->f_dev to our devsw entry.
     75  * This opens the low-level device and sets f->f_devdata.
     76  */
     77 int
     78 net_open(pd)
     79 	struct romdev *pd;
     80 {
     81 	int error = 0;
     82 
     83 	/* On first open, do netif open, mount, etc. */
     84 	if (open_count == 0) {
     85 		/* Find network interface. */
     86 		if ((netdev_sock = netif_news_open(pd)) < 0) {
     87 			error = errno;
     88 			goto bad;
     89 		}
     90 		if ((error = net_mountroot()) != 0)
     91 			goto bad;
     92 	}
     93 	open_count++;
     94 bad:
     95 	return (error);
     96 }
     97 
     98 int
     99 net_close(pd)
    100 	struct romdev *pd;
    101 {
    102 	/* On last close, do netif close, etc. */
    103 	if (open_count <= 0)
    104 		return (0);
    105 
    106 	if (--open_count == 0)
    107 		netif_news_close(netdev_sock);
    108 
    109 	return (0);
    110 }
    111 
    112 int
    113 net_mountroot()
    114 {
    115 
    116 #ifdef DEBUG
    117 	printf("net_mountroot\n");
    118 #endif
    119 
    120 	/*
    121 	 * Get info for NFS boot: our IP address, our hostname,
    122 	 * server IP address, and our root path on the server.
    123 	 * There are two ways to do this:  The old, Sun way,
    124 	 * and the more modern, BOOTP way. (RFC951, RFC1048)
    125 	 */
    126 
    127 #ifdef	SUN_BOOTPARAMS
    128 	/* Get boot info using RARP and Sun bootparams. */
    129 
    130 	/* Get our IP address.  (rarp.c) */
    131 	if (rarp_getipaddress(netdev_sock) == -1)
    132 		return (errno);
    133 
    134 	printf("boot: client IP address: %s\n", inet_ntoa(myip));
    135 
    136 	/* Get our hostname, server IP address. */
    137 	if (bp_whoami(netdev_sock))
    138 		return (errno);
    139 
    140 	printf("boot: client name: %s\n", hostname);
    141 
    142 	/* Get the root pathname. */
    143 	if (bp_getfile(netdev_sock, "root", &rootip, rootpath))
    144 		return (errno);
    145 
    146 #else
    147 
    148 	/* Get boot info using BOOTP way. (RFC951, RFC1048) */
    149 	bootp(netdev_sock);
    150 
    151 	printf("Using IP address: %s\n", inet_ntoa(myip));
    152 
    153 	printf("myip: %s (%s)", hostname, inet_ntoa(myip));
    154 	if (gateip)
    155 		printf(", gateip: %s", inet_ntoa(gateip));
    156 	if (netmask)
    157 		printf(", netmask: %s", intoa(netmask));
    158 	printf("\n");
    159 
    160 #endif
    161 
    162 	printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);
    163 
    164 	/* Get the NFS file handle (mount). */
    165 	if (nfs_mount(netdev_sock, rootip, rootpath) != 0)
    166 		return (errno);
    167 
    168 	return (0);
    169 }
    170