net.c revision 1.6 
1/*	$NetBSD: net.c,v 1.6 2002/05/14 14:27:33 lukem 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/bootp.h>
62#include <lib/libsa/nfs.h>
63
64#include <lib/libkern/libkern.h>
65
66#include <sparc/stand/common/promdev.h>
67
68char		rootpath[FNAME_SIZE];
69
70int	netdev_sock = -1;
71static	int open_count;
72
73static int net_mountroot_bootparams __P((void));
74static int net_mountroot_bootp __P((void));
75
76/*
77 * Called by devopen after it sets f->f_dev to our devsw entry.
78 * This opens the low-level device and sets f->f_devdata.
79 */
80int
81net_open(pd)
82	struct promdata *pd;
83{
84	int error = 0;
85
86	/* On first open, do netif open, mount, etc. */
87	if (open_count == 0) {
88		/* Find network interface. */
89		if ((netdev_sock = netif_open(pd)) < 0) {
90			error = errno;
91			goto bad;
92		}
93		if ((error = net_mountroot()) != 0)
94			goto bad;
95	}
96	open_count++;
97bad:
98	return (error);
99}
100
101int
102net_close(pd)
103	struct promdata *pd;
104{
105	/* On last close, do netif close, etc. */
106	if (open_count <= 0)
107		return (0);
108
109	if (--open_count == 0)
110		return (netif_close(netdev_sock));
111
112	return (0);
113}
114
115int
116net_mountroot_bootparams()
117{
118	/* Get our IP address.  (rarp.c) */
119	if (rarp_getipaddress(netdev_sock) == -1)
120		return (errno);
121
122	printf("Using BOOTPARAMS protocol: ");
123	printf("ip address: %s", inet_ntoa(myip));
124
125	/* Get our hostname, server IP address. */
126	if (bp_whoami(netdev_sock))
127		return (errno);
128
129	printf(", hostname: %s\n", hostname);
130
131	/* Get the root pathname. */
132	if (bp_getfile(netdev_sock, "root", &rootip, rootpath))
133		return (errno);
134
135	return (0);
136}
137
138int
139net_mountroot_bootp()
140{
141	bootp(netdev_sock);
142
143	if (myip.s_addr == 0)
144		return(ENOENT);
145
146	printf("Using BOOTP protocol: ");
147	printf("ip address: %s", inet_ntoa(myip));
148
149	if (hostname[0])
150		printf(", hostname: %s", hostname);
151	if (netmask)
152		printf(", netmask: %s", intoa(netmask));
153	if (gateip.s_addr)
154		printf(", gateway: %s", inet_ntoa(gateip));
155	printf("\n");
156
157	return (0);
158}
159
160int
161net_mountroot()
162{
163	int error;
164
165#ifdef DEBUG
166	printf("net_mountroot\n");
167#endif
168
169	/*
170	 * Get info for NFS boot: our IP address, our hostname,
171	 * server IP address, and our root path on the server.
172	 * There are two ways to do this:  The old, Sun way,
173	 * and the more modern, BOOTP way. (RFC951, RFC1048)
174	 */
175
176		/* Try BOOTP first */
177	error = net_mountroot_bootp();
178		/* Historically, we've used BOOTPARAMS, so try that next */
179	if (error != 0)
180		error = net_mountroot_bootparams();
181	if (error != 0)
182		return (error);
183
184	printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);
185
186	/* Get the NFS file handle (mount). */
187	if (nfs_mount(netdev_sock, rootip, rootpath) != 0)
188		return (errno);
189
190	return (0);
191}
192