1/*	$NetBSD: net.c,v 1.7 2006/01/27 03:48:15 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_of_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 "net.h"
54
55#include <sys/param.h>
56#include <sys/socket.h>
57
58#include <net/if.h>
59#include <netinet/in.h>
60#include <netinet/in_systm.h>
61
62#include <lib/libsa/stand.h>
63#include <lib/libsa/bootp.h>
64#include <lib/libsa/net.h>
65#include <lib/libsa/nfs.h>
66
67#include <lib/libkern/libkern.h>
68
69#include "ofdev.h"
70#include "netif_of.h"
71
72char	rootpath[FNAME_SIZE];
73
74static	int netdev_sock = -1;
75static	int open_count;
76
77static int net_mountroot(void);
78
79/*
80 * Called by devopen after it sets f->f_dev to our devsw entry.
81 * This opens the low-level device and sets f->f_devdata.
82 */
83int
84net_open(struct of_dev *op)
85{
86	int error = 0;
87
88	/*
89	 * On first open, do netif open, mount, etc.
90	 */
91	if (open_count == 0) {
92		/* Find network interface. */
93		if ((netdev_sock = netif_of_open(op)) < 0) {
94			error = errno;
95			goto bad;
96		}
97		if ((error = net_mountroot()) != 0)
98			goto bad;
99	}
100	open_count++;
101bad:
102	if (netdev_sock >= 0 && open_count == 0) {
103		netif_of_close(netdev_sock);
104		netdev_sock = -1;
105	}
106	return error;
107}
108
109int
110net_close(struct of_dev *op)
111{
112	/*
113	 * On last close, do netif close, etc.
114	 */
115	if (open_count > 0)
116		if (--open_count == 0) {
117			netif_of_close(netdev_sock);
118			netdev_sock = -1;
119		}
120	return 0;
121}
122
123static int
124net_mountroot(void)
125{
126
127#ifdef	DEBUG
128	printf("net_mountroot\n");
129#endif
130
131	/*
132	 * Get info for NFS boot: our IP address, out hostname,
133	 * server IP address, and our root path on the server.
134	 * We use BOOTP (RFC951, RFC1532) exclusively as mandated
135	 * by PowerPC Reference Platform Specification I.4.2
136	 */
137
138	bootp(netdev_sock);
139
140	if (myip.s_addr == 0)
141		return ETIMEDOUT;
142
143	printf("Using IP address: %s\n", inet_ntoa(myip));
144
145#ifdef	DEBUG
146	printf("myip: %s (%s)", hostname, inet_ntoa(myip));
147	if (gateip.s_addr)
148		printf(", gateip: %s", inet_ntoa(gateip));
149	if (netmask)
150		printf(", netmask: %s", intoa(netmask));
151	printf("\n");
152#endif
153	printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);
154
155	/*
156	 * Get the NFS file handle (mount).
157	 */
158	if (nfs_mount(netdev_sock, rootip, rootpath) < 0)
159		return errno;
160	return 0;
161}
162