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
68char rootpath[FNAME_SIZE];
69
70int	netdev_sock = -1;
71static	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 */
77int
78net_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++;
94bad:
95	return (error);
96}
97
98int
99net_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
112int
113net_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