1 /* $OpenBSD: dev_net.c,v 1.7 2023/01/16 07:29:35 deraadt Exp $ */
2 /* $NetBSD: dev_net.c,v 1.4 1997/04/06 08:41:24 cgd Exp $ */
3
4 /*
5 * Copyright (c) 1995 Gordon W. Ross
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 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /*
30 * This module implements a "raw device" interface suitable for
31 * use by the stand-alone I/O library NFS code. This interface
32 * does not support any "block" access, and exists only for the
33 * purpose of initializing the network interface, getting boot
34 * parameters, and performing the NFS mount.
35 *
36 * At open time, this does:
37 *
38 * find interface - netif_open()
39 * RARP for IP address - rarp_getipaddress()
40 * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...)
41 * RPC/mountd - nfs_mount(sock, ip, path)
42 *
43 * the root file handle from mountd is saved in a global
44 * for use by the NFS open code (NFS/lookup).
45 */
46
47 #include <stdarg.h>
48 #include <sys/param.h>
49 #include <sys/socket.h>
50 #include <net/if.h>
51 #include <netinet/in.h>
52 #include <netinet/if_ether.h>
53
54 #include <lib/libsa/stand.h>
55 #include <lib/libsa/net.h>
56 #include <lib/libsa/netif.h>
57 #include <lib/libsa/bootparam.h>
58 #include "dev_net.h"
59
60 extern int debug;
61 extern int nfs_root_node[]; /* XXX - get from nfs_mount() */
62
63 /*
64 * Various globals needed by the network code:
65 */
66
67 #if 0
68 /* for arp.c, rarp.c */
69 u_char bcea[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
70 #endif
71
72 /*
73 * Local things...
74 */
75 static int netdev_sock = -1;
76 static int netdev_opens;
77
78 int net_getparams(int);
79 int nfs_mount(int, struct in_addr, char *);
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 * This is declared with variable arguments...
85 */
86 int
net_open(struct open_file * f,...)87 net_open(struct open_file *f, ...)
88 {
89 va_list ap;
90 char *devname; /* Device part of file name (or NULL). */
91 int error = 0;
92
93 va_start(ap, f);
94 devname = va_arg(ap, char *);
95 va_end(ap);
96
97 #ifdef NETIF_DEBUG
98 if (debug)
99 printf("net_open: %s\n", devname);
100 #endif
101
102 /* On first open, do netif open, mount, etc. */
103 if (netdev_opens == 0) {
104 /* Find network interface. */
105 if (netdev_sock < 0) {
106 netdev_sock = netif_open(devname);
107 if (netdev_sock < 0) {
108 printf("net_open: netif_open() failed\n");
109 return (ENXIO);
110 }
111 if (debug)
112 printf("net_open: netif_open() succeeded\n");
113 }
114 if (rootip.s_addr == 0) {
115 /* Get root IP address, and path, etc. */
116 error = net_getparams(netdev_sock);
117 if (error) {
118 /* getparams makes its own noise */
119 goto fail;
120 }
121 /* Get the NFS file handle (mountd). */
122 error = nfs_mount(netdev_sock, rootip, rootpath);
123 if (error) {
124 printf("net_open: NFS mount error=%d\n", error);
125 rootip.s_addr = 0;
126 fail:
127 netif_close(netdev_sock);
128 netdev_sock = -1;
129 return (error);
130 }
131 if (debug)
132 printf("net_open: NFS mount succeeded\n");
133 }
134 }
135 netdev_opens++;
136 f->f_devdata = nfs_root_node;
137 return (error);
138 }
139
140 int
net_close(f)141 net_close(f)
142 struct open_file *f;
143 {
144
145 #ifdef NETIF_DEBUG
146 if (debug)
147 printf("net_close: opens=%d\n", netdev_opens);
148 #endif
149
150 /* On last close, do netif close, etc. */
151 f->f_devdata = NULL;
152 /* Extra close call? */
153 if (netdev_opens <= 0)
154 return (0);
155 netdev_opens--;
156 /* Not last close? */
157 if (netdev_opens > 0)
158 return(0);
159 rootip.s_addr = 0;
160 if (netdev_sock >= 0) {
161 if (debug)
162 printf("net_close: calling netif_close()\n");
163 netif_close(netdev_sock);
164 netdev_sock = -1;
165 }
166 return (0);
167 }
168
169 int
net_ioctl()170 net_ioctl()
171 {
172 return EIO;
173 }
174
175 int
net_strategy()176 net_strategy()
177 {
178 return EIO;
179 }
180
181 int
net_getparams(sock)182 net_getparams(sock)
183 int sock;
184 {
185 /*
186 * Get info for NFS boot: our IP address, our hostname,
187 * server IP address, and our root path on the server.
188 * There are two ways to do this: The old, Sun way,
189 * and the more modern, BOOTP way. (RFC951, RFC1048)
190 */
191
192 #ifdef SUN_BOOTPARAMS
193 /* Get our IP address. (rarp.c) */
194 if (rarp_getipaddress(sock)) {
195 printf("net_open: RARP failed\n");
196 return (EIO);
197 }
198 #else /* BOOTPARAMS */
199 /*
200 * Get boot info using BOOTP. (RFC951, RFC1048)
201 * This also gets the server IP address, gateway,
202 * root path, etc.
203 */
204 bootp(sock);
205 if (myip.s_addr == 0) {
206 printf("net_open: BOOTP failed\n");
207 return (EIO);
208 }
209 #endif /* BOOTPARAMS */
210
211 printf("boot: client addr: %s\n", inet_ntoa(myip));
212
213 #ifdef SUN_BOOTPARAMS
214 /* Get our hostname, server IP address, gateway. */
215 if (bp_whoami(sock)) {
216 printf("net_open: bootparam/whoami RPC failed\n");
217 return (EIO);
218 }
219 #endif /* BOOTPARAMS */
220
221 printf("boot: client name: %s\n", hostname);
222 if (gateip.s_addr) {
223 printf("boot: subnet mask: %s\n", intoa(netmask));
224 printf("boot: net gateway: %s\n", inet_ntoa(gateip));
225 }
226
227 #ifdef SUN_BOOTPARAMS
228 /* Get the root pathname. */
229 if (bp_getfile(sock, "root", &rootip, rootpath)) {
230 printf("net_open: bootparam/getfile RPC failed\n");
231 return (EIO);
232 }
233 #endif /* BOOTPARAMS */
234
235 printf("boot: server addr: %s\n", inet_ntoa(rootip));
236 printf("boot: server path: %s\n", rootpath);
237
238 return (0);
239 }
240