2 * $NetBSD: dev_net.c,v 1.12 1997/12/10 20:38:37 gwr Exp $
6 * Copyright (c) 1997 The NetBSD Foundation, Inc.
9 * This code is derived from software contributed to The NetBSD Foundation
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the NetBSD
23 * Foundation, Inc. and its contributors.
24 * 4. Neither the name of The NetBSD Foundation nor the names of its
25 * contributors may be used to endorse or promote products derived
26 * from this software without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 * POSSIBILITY OF SUCH DAMAGE.
40 * $FreeBSD: src/sys/boot/common/dev_net.c,v 1.13 2003/11/03 19:45:05 iedowse Exp $
41 * $DragonFly: src/sys/boot/common/dev_net.c,v 1.4 2003/11/10 06:08:31 dillon Exp $
45 * This module implements a "raw device" interface suitable for
46 * use by the stand-alone I/O library NFS code. This interface
47 * does not support any "block" access, and exists only for the
48 * purpose of initializing the network interface, getting boot
49 * parameters, and performing the NFS mount.
51 * At open time, this does:
53 * find interface - netif_open()
54 * RARP for IP address - rarp_getipaddress()
55 * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...)
56 * RPC/mountd - nfs_mount(sock, ip, path)
58 * the root file handle from mountd is saved in a global
59 * for use by the NFS open code (NFS/lookup).
62 #include <machine/stdarg.h>
63 #include <sys/param.h>
64 #include <sys/socket.h>
66 #include <netinet/in.h>
67 #include <netinet/in_systm.h>
74 #include <bootparam.h>
77 #include "bootstrap.h"
81 static int netdev_sock
= -1;
82 static int netdev_opens
;
84 static int net_init(void);
85 static int net_open(struct open_file
*, ...);
86 static int net_close(struct open_file
*);
87 static int net_strategy();
88 static void net_print(int);
90 static int net_getparams(int sock
);
92 struct devsw netdev
= {
110 * Called by devopen after it sets f->f_dev to our devsw entry.
111 * This opens the low-level device and sets f->f_devdata.
112 * This is declared with variable arguments...
115 net_open(struct open_file
*f
, ...)
118 char *devname
; /* Device part of file name (or NULL). */
122 devname
= va_arg(args
, char*);
125 /* On first open, do netif open, mount, etc. */
126 if (netdev_opens
== 0) {
127 /* Find network interface. */
128 if (netdev_sock
< 0) {
129 netdev_sock
= netif_open(devname
);
130 if (netdev_sock
< 0) {
131 printf("net_open: netif_open() failed\n");
135 printf("net_open: netif_open() succeeded\n");
137 if (rootip
.s_addr
== 0) {
138 /* Get root IP address, and path, etc. */
139 error
= net_getparams(netdev_sock
);
141 /* getparams makes its own noise */
142 netif_close(netdev_sock
);
150 f
->f_devdata
= &netdev_sock
;
161 printf("net_close: opens=%d\n", netdev_opens
);
164 /* On last close, do netif close, etc. */
166 /* Extra close call? */
167 if (netdev_opens
<= 0)
170 /* Not last close? */
171 if (netdev_opens
> 0)
174 if (netdev_sock
>= 0) {
176 printf("net_close: calling netif_close()\n");
177 netif_close(netdev_sock
);
189 #define SUPPORT_BOOTP
192 * Get info for NFS boot: our IP address, our hostname,
193 * server IP address, and our root path on the server.
194 * There are two ways to do this: The old, Sun way,
195 * and the more modern, BOOTP way. (RFC951, RFC1048)
197 * The default is to use the Sun bootparams RPC
198 * (because that is what the kernel will do).
199 * MD code can make try_bootp initialied data,
200 * which will override this common definition.
206 extern n_long
ip_convertaddr(char *p
);
212 char buf
[MAXHOSTNAMELEN
];
213 char temp
[FNAME_SIZE
];
220 * Try to get boot info using BOOTP. If we succeed, then
221 * the server IP address, gateway, and root path will all
222 * be initialized. If any remain uninitialized, we will
223 * use RARP and RPC/bootparam (the Sun way) to get them.
226 bootp(sock
, BOOTP_NONE
);
227 if (myip
.s_addr
!= 0)
230 printf("net_open: BOOTP failed, trying RARP/RPC...\n");
234 * Use RARP to get our IP address. This also sets our
235 * netmask to the "natural" default for our address.
237 if (rarp_getipaddress(sock
)) {
238 printf("net_open: RARP failed\n");
241 printf("net_open: client addr: %s\n", inet_ntoa(myip
));
243 /* Get our hostname, server IP address, gateway. */
244 if (bp_whoami(sock
)) {
245 printf("net_open: bootparam/whoami RPC failed\n");
248 printf("net_open: client name: %s\n", hostname
);
251 * Ignore the gateway from whoami (unreliable).
252 * Use the "gateway" parameter instead.
256 if (bp_getfile(sock
, "gateway", &gateip
, buf
) == 0) {
257 /* Got it! Parse the netmask. */
258 smask
= ip_convertaddr(buf
);
262 printf("net_open: subnet mask: %s\n", intoa(netmask
));
265 printf("net_open: net gateway: %s\n", inet_ntoa(gateip
));
267 /* Get the root server and pathname. */
268 if (bp_getfile(sock
, "root", &rootip
, rootpath
)) {
269 printf("net_open: bootparam/getfile RPC failed\n");
274 * If present, strip the server's address off of the rootpath
275 * before passing it along. This allows us to be compatible with
276 * the kernel's diskless (BOOTP_NFSROOT) booting conventions
278 for (i
= 0; rootpath
[i
] != '\0' && i
< FNAME_SIZE
; i
++)
279 if (rootpath
[i
] == ':')
281 if (i
&& i
!= FNAME_SIZE
&& rootpath
[i
] == ':') {
282 rootpath
[i
++] = '\0';
283 if (inet_addr(&rootpath
[0]) != INADDR_NONE
)
284 rootip
.s_addr
= inet_addr(&rootpath
[0]);
285 bcopy(&rootpath
[i
], &temp
[0], strlen(&rootpath
[i
])+1);
286 bcopy(&temp
[0], &rootpath
[0], strlen(&rootpath
[i
])+1);
288 printf("net_open: server addr: %s\n", inet_ntoa(rootip
));
289 printf("net_open: server path: %s\n", rootpath
);
291 d
= socktodesc(sock
);
292 sprintf(temp
, "%6D", d
->myea
, ":");
293 setenv("boot.netif.ip", inet_ntoa(myip
), 1);
294 setenv("boot.netif.netmask", intoa(netmask
), 1);
295 setenv("boot.netif.gateway", inet_ntoa(gateip
), 1);
296 setenv("boot.netif.hwaddr", temp
, 1);
297 setenv("boot.nfsroot.server", inet_ntoa(rootip
), 1);
298 setenv("boot.nfsroot.path", rootpath
, 1);
304 net_print(int verbose
)