1/*	$OpenBSD: net.c,v 1.7 2021/01/30 14:37:01 deraadt Exp $	*/
2/*	$NetBSD: net.c,v 1.1 1997/04/16 20:29:18 thorpej Exp $	*/
3
4/*
5 * Copyright (C) 1995 Wolfgang Solfrank.
6 * Copyright (C) 1995 TooLs GmbH.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by TooLs GmbH.
20 * 4. The name of TooLs GmbH may not be used to endorse or promote products
21 *    derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35/*
36 * This module implements a "raw device" interface suitable for
37 * use by the stand-alone I/O library NFS code.  This interface
38 * does not support any "block" access, and exists only for the
39 * purpose of initializing the network interface, getting boot
40 * parameters, and performing the NFS mount.
41 *
42 * At open time, this does:
43 *
44 * find interface	- netif_open()
45 * BOOTP		- bootp()
46 * RPC/mountd		- nfs_mount()
47 *
48 * The root file handle from mountd is saved in a global
49 * for use by the NFS open code (NFS/lookup).
50 *
51 * Note: this is based in part on sys/arch/sparc/stand/net.c
52 */
53
54#include <sys/param.h>
55#include <sys/socket.h>
56#include <net/if.h>
57#include <netinet/in.h>
58#include <netinet/if_ether.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/nfs.h>
65
66#include "ofdev.h"
67
68int net_mountroot(void);
69
70extern char	rootpath[FNAME_SIZE];
71
72static	int netdev_sock = -1;
73static	int open_count;
74
75/*
76 * Called by devopen after it sets f->f_dev to our devsw entry.
77 * This opens the low-level device and sets f->f_devdata.
78 */
79int
80net_open(struct of_dev *op)
81{
82	int error = 0;
83
84	/*
85	 * On first open, do netif open, mount, etc.
86	 */
87	if (open_count == 0) {
88		/* Find network interface. */
89		if ((netdev_sock = netif_open(op)) < 0) {
90			error = errno;
91			goto bad;
92		}
93		if ((error = net_mountroot()) != 0)
94			goto bad;
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
105void
106net_close(struct of_dev *op)
107{
108	/*
109	 * On last close, do netif close, etc.
110	 */
111	if (open_count > 0)
112		if (--open_count == 0) {
113			netif_close(netdev_sock);
114			netdev_sock = -1;
115		}
116}
117
118int
119net_mountroot()
120{
121
122#ifdef	DEBUG
123	printf("net_mountroot\n");
124#endif
125
126	/*
127	 * Get info for NFS boot: our IP address, out hostname,
128	 * server IP address, and our root path on the server.
129	 * We use BOOTP (RFC951, RFC1532) exclusively as mandated
130	 * by PowerPC Reference Platform Specification I.4.2
131	 */
132
133	bootp(netdev_sock);
134
135	if (myip.s_addr == 0)
136		return ETIMEDOUT;
137
138	printf("Using IP address: %s\n", inet_ntoa(myip));
139
140#ifdef	DEBUG
141	printf("myip: %s (%s)", hostname, inet_ntoa(myip));
142	if (gateip.s_addr)
143		printf(", gateip: %s", inet_ntoa(gateip));
144	if (netmask)
145		printf(", netmask: %s", intoa(netmask));
146	printf("\n");
147#endif
148	printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);
149
150	/*
151	 * Get the NFS file handle (mount).
152	 */
153	if (nfs_mount(netdev_sock, rootip, rootpath) < 0)
154		return errno;
155	return 0;
156}
157