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net.c revision 1.1 
      1 /*	$NetBSD: net.c,v 1.1 1999/12/22 05:54:41 tsubai 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/netif.h>
     60 #include <lib/libsa/bootparam.h>
     61 #include <lib/libsa/nfs.h>
     62 
     63 #include <lib/libkern/libkern.h>
     64 
     65 #include <promdev.h>
     66 
     67 char rootpath[FNAME_SIZE];
     68 
     69 int	netdev_sock = -1;
     70 static	int open_count;
     71 
     72 /*
     73  * Called by devopen after it sets f->f_dev to our devsw entry.
     74  * This opens the low-level device and sets f->f_devdata.
     75  */
     76 int
     77 net_open(pd)
     78 	struct romdev *pd;
     79 {
     80 	int error = 0;
     81 
     82 	/* On first open, do netif open, mount, etc. */
     83 	if (open_count == 0) {
     84 		/* Find network interface. */
     85 		if ((netdev_sock = netif_open(pd)) < 0) {
     86 			error = errno;
     87 			goto bad;
     88 		}
     89 		if ((error = net_mountroot()) != 0)
     90 			goto bad;
     91 	}
     92 	open_count++;
     93 bad:
     94 	return (error);
     95 }
     96 
     97 int
     98 net_close(pd)
     99 	struct romdev *pd;
    100 {
    101 	/* On last close, do netif close, etc. */
    102 	if (open_count <= 0)
    103 		return (0);
    104 
    105 	if (--open_count == 0)
    106 		return (netif_close(netdev_sock));
    107 
    108 	return (0);
    109 }
    110 
    111 int
    112 net_mountroot()
    113 {
    114 
    115 #ifdef DEBUG
    116 	printf("net_mountroot\n");
    117 #endif
    118 
    119 	/*
    120 	 * Get info for NFS boot: our IP address, our hostname,
    121 	 * server IP address, and our root path on the server.
    122 	 * There are two ways to do this:  The old, Sun way,
    123 	 * and the more modern, BOOTP way. (RFC951, RFC1048)
    124 	 */
    125 
    126 #ifdef	SUN_BOOTPARAMS
    127 	/* Get boot info using RARP and Sun bootparams. */
    128 
    129 	/* Get our IP address.  (rarp.c) */
    130 	if (rarp_getipaddress(netdev_sock) == -1)
    131 		return (errno);
    132 
    133 	printf("boot: client IP address: %s\n", inet_ntoa(myip));
    134 
    135 	/* Get our hostname, server IP address. */
    136 	if (bp_whoami(netdev_sock))
    137 		return (errno);
    138 
    139 	printf("boot: client name: %s\n", hostname);
    140 
    141 	/* Get the root pathname. */
    142 	if (bp_getfile(netdev_sock, "root", &rootip, rootpath))
    143 		return (errno);
    144 
    145 #else
    146 
    147 	/* Get boot info using BOOTP way. (RFC951, RFC1048) */
    148 	bootp(netdev_sock);
    149 
    150 	printf("Using IP address: %s\n", inet_ntoa(myip));
    151 
    152 	printf("myip: %s (%s)", hostname, inet_ntoa(myip));
    153 	if (gateip)
    154 		printf(", gateip: %s", inet_ntoa(gateip));
    155 	if (netmask)
    156 		printf(", netmask: %s", intoa(netmask));
    157 	printf("\n");
    158 
    159 #endif
    160 
    161 	printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);
    162 
    163 	/* Get the NFS file handle (mount). */
    164 	if (nfs_mount(netdev_sock, rootip, rootpath) != 0)
    165 		return (errno);
    166 
    167 	return (0);
    168 }
    169