net.c revision 1.4 
1/*	$NetBSD: net.c,v 1.4 2008/05/12 11:16:31 mlelstv 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	}
96	open_count++;
97bad:
98	if (netdev_sock >= 0 && open_count == 0) {
99		netif_close(netdev_sock);
100		netdev_sock = -1;
101	}
102	return error;
103}
104
105int
106net_close(struct of_dev *op)
107{
108
109	/*
110	 * On last close, do netif close, etc.
111	 */
112	if (open_count > 0)
113		if (--open_count == 0) {
114			netif_close(netdev_sock);
115			netdev_sock = -1;
116		}
117}
118
119int
120net_mountroot_bootparams(void)
121{
122
123	/* Get our IP address.  (rarp.c) */
124	if (rarp_getipaddress(netdev_sock) == -1)
125		return (errno);
126
127	printf("Using BOOTPARAMS protocol: ");
128	printf("ip address: %s", inet_ntoa(myip));
129
130	/* Get our hostname, server IP address. */
131	if (bp_whoami(netdev_sock))
132		return (errno);
133
134	printf(", hostname: %s\n", hostname);
135
136	/* Get the root pathname. */
137	if (bp_getfile(netdev_sock, "root", &rootip, rootpath))
138		return (errno);
139
140	return (0);
141}
142
143int
144net_mountroot_bootp(void)
145{
146
147	bootp(netdev_sock);
148
149	if (myip.s_addr == 0)
150		return(ENOENT);
151
152	printf("Using BOOTP protocol: ");
153	printf("ip address: %s", inet_ntoa(myip));
154
155	if (hostname[0])
156		printf(", hostname: %s", hostname);
157	if (netmask)
158		printf(", netmask: %s", intoa(netmask));
159	if (gateip.s_addr)
160		printf(", gateway: %s", inet_ntoa(gateip));
161	printf("\n");
162
163	return (0);
164}
165
166int
167net_tftp_bootp(int **sock)
168{
169
170	bootp(netdev_sock);
171
172	if (myip.s_addr == 0)
173		return(ENOENT);
174
175	printf("Using BOOTP protocol: ");
176	printf("ip address: %s", inet_ntoa(myip));
177
178	if (hostname[0])
179		printf(", hostname: %s", hostname);
180	if (netmask)
181		printf(", netmask: %s", intoa(netmask));
182	if (gateip.s_addr)
183		printf(", gateway: %s", inet_ntoa(gateip));
184	printf("\n");
185
186	*sock = &netdev_sock;
187	return (0);
188}
189
190int
191net_mountroot(void)
192{
193	int error;
194
195#ifdef DEBUG
196	printf("net_mountroot\n");
197#endif
198
199	/*
200	 * Get info for NFS boot: our IP address, our hostname,
201	 * server IP address, and our root path on the server.
202	 * There are two ways to do this:  The old, Sun way,
203	 * and the more modern, BOOTP way. (RFC951, RFC1048)
204	 */
205
206		/* Try BOOTP first */
207	error = net_mountroot_bootp();
208		/* Historically, we've used BOOTPARAMS, so try that next */
209	if (error != 0)
210		error = net_mountroot_bootparams();
211	if (error != 0)
212		return (error);
213
214	printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);
215
216	/* Get the NFS file handle (mount). */
217	if (nfs_mount(netdev_sock, rootip, rootpath) != 0)
218		return (errno);
219
220	return (0);
221}
222