net.c revision 1.3 
1/*	$NetBSD: net.c,v 1.3 2006/07/13 20:03:34 uwe Exp $	*/
2
3/*
4 * Copyright (C) 1995 Wolfgang Solfrank.
5 * Copyright (C) 1995 TooLs GmbH.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by TooLs GmbH.
19 * 4. The name of TooLs GmbH may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34/*
35 * This module implements a "raw device" interface suitable for
36 * use by the stand-alone I/O library NFS code.  This interface
37 * does not support any "block" access, and exists only for the
38 * purpose of initializing the network interface, getting boot
39 * parameters, and performing the NFS mount.
40 *
41 * At open time, this does:
42 *
43 * find interface	- netif_open()
44 * BOOTP		- bootp()
45 * RPC/mountd		- nfs_mount()
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 * Note: this is based in part on sys/arch/sparc/stand/net.c
51 */
52
53#include <sys/param.h>
54#include <sys/socket.h>
55
56#include <net/if.h>
57#include <netinet/in.h>
58#include <netinet/in_systm.h>
59
60#include <lib/libsa/stand.h>
61#include <lib/libsa/net.h>
62#include <lib/libsa/netif.h>
63
64#include <lib/libkern/libkern.h>
65
66#include "ofdev.h"
67
68
69static int net_mountroot_bootparams(void);
70static int net_mountroot_bootp(void);
71
72char	rootpath[FNAME_SIZE];
73
74static	int netdev_sock = -1;
75static	int open_count;
76
77/*
78 * Called by devopen after it sets f->f_dev to our devsw entry.
79 * This opens the low-level device and sets f->f_devdata.
80 */
81int
82net_open(struct of_dev *op)
83{
84	int error = 0;
85
86	/*
87	 * On first open, do netif open, mount, etc.
88	 */
89	if (open_count == 0) {
90		/* Find network interface. */
91		if ((netdev_sock = netif_open(op)) < 0) {
92			error = errno;
93			goto bad;
94		}
95		if ((error = net_mountroot()) != 0)
96			goto bad;
97	}
98	open_count++;
99bad:
100	if (netdev_sock >= 0 && open_count == 0) {
101		netif_close(netdev_sock);
102		netdev_sock = -1;
103	}
104	return error;
105}
106
107int
108net_close(struct of_dev *op)
109{
110
111	/*
112	 * On last close, do netif close, etc.
113	 */
114	if (open_count > 0)
115		if (--open_count == 0) {
116			netif_close(netdev_sock);
117			netdev_sock = -1;
118		}
119}
120
121int
122net_mountroot_bootparams(void)
123{
124
125	/* Get our IP address.  (rarp.c) */
126	if (rarp_getipaddress(netdev_sock) == -1)
127		return (errno);
128
129	printf("Using BOOTPARAMS protocol: ");
130	printf("ip address: %s", inet_ntoa(myip));
131
132	/* Get our hostname, server IP address. */
133	if (bp_whoami(netdev_sock))
134		return (errno);
135
136	printf(", hostname: %s\n", hostname);
137
138	/* Get the root pathname. */
139	if (bp_getfile(netdev_sock, "root", &rootip, rootpath))
140		return (errno);
141
142	return (0);
143}
144
145int
146net_mountroot_bootp(void)
147{
148
149	bootp(netdev_sock);
150
151	if (myip.s_addr == 0)
152		return(ENOENT);
153
154	printf("Using BOOTP protocol: ");
155	printf("ip address: %s", inet_ntoa(myip));
156
157	if (hostname[0])
158		printf(", hostname: %s", hostname);
159	if (netmask)
160		printf(", netmask: %s", intoa(netmask));
161	if (gateip.s_addr)
162		printf(", gateway: %s", inet_ntoa(gateip));
163	printf("\n");
164
165	return (0);
166}
167
168int
169net_mountroot(void)
170{
171	int error;
172
173#ifdef DEBUG
174	printf("net_mountroot\n");
175#endif
176
177	/*
178	 * Get info for NFS boot: our IP address, our hostname,
179	 * server IP address, and our root path on the server.
180	 * There are two ways to do this:  The old, Sun way,
181	 * and the more modern, BOOTP way. (RFC951, RFC1048)
182	 */
183
184		/* Try BOOTP first */
185	error = net_mountroot_bootp();
186		/* Historically, we've used BOOTPARAMS, so try that next */
187	if (error != 0)
188		error = net_mountroot_bootparams();
189	if (error != 0)
190		return (error);
191
192	printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);
193
194	/* Get the NFS file handle (mount). */
195	if (nfs_mount(netdev_sock, rootip, rootpath) != 0)
196		return (errno);
197
198	return (0);
199}
200