1/*	$NetBSD$	*/
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#include <lib/libsa/bootp.h>
64#include <lib/libsa/bootparam.h>
65#include <lib/libsa/nfs.h>
66
67#include <lib/libkern/libkern.h>
68
69#include "ofdev.h"
70#include "net.h"
71
72
73static int net_mountroot_bootparams(void);
74static int net_mountroot_bootp(void);
75
76char	rootpath[FNAME_SIZE];
77
78static	int netdev_sock = -1;
79static	int open_count;
80
81/*
82 * Called by devopen after it sets f->f_dev to our devsw entry.
83 * This opens the low-level device and sets f->f_devdata.
84 */
85int
86net_open(struct of_dev *op)
87{
88	int error = 0;
89
90	/*
91	 * On first open, do netif open, mount, etc.
92	 */
93	if (open_count == 0) {
94		/* Find network interface. */
95		if ((netdev_sock = netif_open(op)) < 0) {
96			error = errno;
97			goto bad;
98		}
99	}
100	open_count++;
101bad:
102	if (netdev_sock >= 0 && open_count == 0) {
103		netif_close(netdev_sock);
104		netdev_sock = -1;
105	}
106	return error;
107}
108
109int
110net_close(struct of_dev *op)
111{
112
113	/*
114	 * On last close, do netif close, etc.
115	 */
116	if (open_count > 0)
117		if (--open_count == 0) {
118			netif_close(netdev_sock);
119			netdev_sock = -1;
120		}
121	return 0;
122}
123
124static void
125net_clear_params(void)
126{
127
128	myip.s_addr = 0;
129	netmask = 0;
130	gateip.s_addr = 0;
131	*hostname = '\0';
132	rootip.s_addr = 0;
133	*rootpath = '\0';
134}
135
136int
137net_mountroot_bootparams(void)
138{
139
140	net_clear_params();
141
142	/* Get our IP address.  (rarp.c) */
143	if (rarp_getipaddress(netdev_sock) == -1)
144		return (errno);
145	printf("Using BOOTPARAMS protocol:\n  ip addr=%s\n", inet_ntoa(myip));
146	if (bp_whoami(netdev_sock))
147		return (errno);
148	printf("  hostname=%s\n", hostname);
149	if (bp_getfile(netdev_sock, "root", &rootip, rootpath))
150		return (errno);
151
152	return (0);
153}
154
155int
156net_mountroot_bootp(void)
157{
158	int attempts;
159
160	/* We need a few attempts here as some DHCP servers
161	 * require >1 packet and my wireless bridge is always
162	 * in learning mode until the 2nd attempt ... */
163	for (attempts = 0; attempts < 3; attempts++) {
164		net_clear_params();
165		bootp(netdev_sock);
166		if (myip.s_addr != 0)
167			break;
168	}
169	if (myip.s_addr == 0)
170		return(ENOENT);
171
172	printf("Using BOOTP protocol:\n ip addr=%s\n", inet_ntoa(myip));
173	if (hostname[0])
174		printf("  hostname=%s\n", hostname);
175	if (netmask)
176		printf("  netmask=%s\n", intoa(netmask));
177	if (gateip.s_addr)
178		printf("  gateway=%s\n", inet_ntoa(gateip));
179
180	return (0);
181}
182
183/*
184 * libsa's tftp_open expects a pointer to netdev_sock, i.e. an (int *),
185 * in f_devdata, a pointer to which gets handed down from devopen().
186 *
187 * Do not expect booting via different methods to have the same
188 * requirements or semantics.
189 *
190 * net_tftp_bootp uses net_mountroot_bootp because that incidentially does
191 * most of what it needs to do. It of course in no manner actually mounts
192 * anything, all that routine actually does is prepare the socket for the
193 * necessary net access, and print info for the user.
194 */
195
196int
197net_tftp_bootp(int **sock)
198{
199
200	net_mountroot_bootp();
201	if (myip.s_addr == 0)
202		return(ENOENT);
203
204	*sock = &netdev_sock;
205	return (0);
206}
207
208int
209net_mountroot(void)
210{
211	int error;
212
213#ifdef DEBUG
214	printf("net_mountroot\n");
215#endif
216
217	/*
218	 * Get info for NFS boot: our IP address, our hostname,
219	 * server IP address, and our root path on the server.
220	 * There are two ways to do this:  The old, Sun way,
221	 * and the more modern, BOOTP way. (RFC951, RFC1048)
222	 */
223
224		/* Try BOOTP first */
225	error = net_mountroot_bootp();
226		/* Historically, we've used BOOTPARAMS, so try that next */
227	if (error != 0)
228		error = net_mountroot_bootparams();
229	if (error != 0)
230		return (error);
231
232	printf("  root addr=%s\n  path=%s\n", inet_ntoa(rootip), rootpath);
233
234	/* Get the NFS file handle (mount). */
235	if (nfs_mount(netdev_sock, rootip, rootpath) != 0)
236		return (errno);
237
238	return (0);
239}
240