1 /* $NetBSD: net.c,v 1.7 2021/04/12 03:55:40 mrg 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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 /*
29 * This module implements a "raw device" interface suitable for
30 * use by the stand-alone I/O library NFS code. This interface
31 * does not support any "block" access, and exists only for the
32 * purpose of initializing the network interface, getting boot
33 * parameters, and performing the NFS mount.
34 *
35 * At open time, this does:
36 *
37 * find interface - netif_open()
38 * RARP for IP address - rarp_getipaddress()
39 * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...)
40 * RPC/mountd - nfs_mount(sock, ip, path)
41 *
42 * the root file handle from mountd is saved in a global
43 * for use by the NFS open code (NFS/lookup).
44 */
45
46 #include <sys/param.h>
47 #include <sys/socket.h>
48 #include <net/if.h>
49 #include <netinet/in.h>
50 #include <netinet/in_systm.h>
51
52 #include <lib/libsa/stand.h>
53 #include <lib/libsa/net.h>
54 #include <lib/libsa/bootparam.h>
55 #include <lib/libsa/bootp.h>
56 #include <lib/libsa/nfs.h>
57
58 #include <lib/libkern/libkern.h>
59
60 #include <promdev.h>
61
62 #include "netif_news.h"
63
64 int netdev_sock = -1;
65 static int open_count;
66
67 /*
68 * Called by devopen after it sets f->f_dev to our devsw entry.
69 * This opens the low-level device and sets f->f_devdata.
70 */
71 int
net_open(struct romdev * pd)72 net_open(struct romdev *pd)
73 {
74 int error = 0;
75
76 /* On first open, do netif open, mount, etc. */
77 if (open_count == 0) {
78 /* Find network interface. */
79 if ((netdev_sock = netif_news_open(pd)) < 0) {
80 error = errno;
81 goto bad;
82 }
83 if ((error = net_mountroot()) != 0)
84 goto bad;
85 }
86 open_count++;
87 bad:
88 return error;
89 }
90
91 int
net_close(struct romdev * pd)92 net_close(struct romdev *pd)
93 {
94 /* On last close, do netif close, etc. */
95 if (open_count <= 0)
96 return 0;
97
98 if (--open_count == 0)
99 netif_news_close(netdev_sock);
100
101 return 0;
102 }
103
104 int
net_mountroot(void)105 net_mountroot(void)
106 {
107
108 #ifdef DEBUG
109 printf("net_mountroot\n");
110 #endif
111
112 /*
113 * Get info for NFS boot: our IP address, our hostname,
114 * server IP address, and our root path on the server.
115 * There are two ways to do this: The old, Sun way,
116 * and the more modern, BOOTP way. (RFC951, RFC1048)
117 */
118
119 #ifdef SUN_BOOTPARAMS
120 /* Get boot info using RARP and Sun bootparams. */
121
122 /* Get our IP address. (rarp.c) */
123 if (rarp_getipaddress(netdev_sock) == -1)
124 return (errno);
125
126 printf("boot: client IP address: %s\n", inet_ntoa(myip));
127
128 /* Get our hostname, server IP address. */
129 if (bp_whoami(netdev_sock))
130 return (errno);
131
132 printf("boot: client name: %s\n", hostname);
133
134 /* Get the root pathname. */
135 if (bp_getfile(netdev_sock, "root", &rootip, rootpath))
136 return (errno);
137
138 #else
139
140 /* Get boot info using BOOTP way. (RFC951, RFC1048) */
141 bootp(netdev_sock);
142
143 printf("Using IP address: %s\n", inet_ntoa(myip));
144
145 printf("myip: %s (%s)", hostname, inet_ntoa(myip));
146 if (gateip.s_addr)
147 printf(", gateip: %s", inet_ntoa(gateip));
148 if (netmask)
149 printf(", netmask: %s", intoa(netmask));
150 printf("\n");
151
152 #endif
153
154 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);
155
156 /* Get the NFS file handle (mount). */
157 if (nfs_mount(netdev_sock, rootip, rootpath) != 0)
158 return (errno);
159
160 return 0;
161 }
162