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
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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 $
44 * This module implements a "raw device" interface suitable for
45 * use by the stand-alone I/O library NFS code. This interface
46 * does not support any "block" access, and exists only for the
47 * purpose of initializing the network interface, getting boot
48 * parameters, and performing the NFS mount.
50 * At open time, this does:
52 * find interface - netif_open()
53 * RARP for IP address - rarp_getipaddress()
54 * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...)
55 * RPC/mountd - nfs_mount(sock, ip, path)
57 * the root file handle from mountd is saved in a global
58 * for use by the NFS open code (NFS/lookup).
61 #include <machine/stdarg.h>
62 #include <sys/param.h>
63 #include <sys/socket.h>
65 #include <netinet/in.h>
66 #include <netinet/in_systm.h>
73 #include <bootparam.h>
76 #include "bootstrap.h"
80 static int netdev_sock = -1;
81 static int netdev_opens;
83 static int net_init(void);
84 static int net_open(struct open_file *, ...);
85 static int net_close(struct open_file *);
86 static int net_strategy();
87 static void net_print(int);
89 static int net_getparams(int sock);
91 struct devsw netdev = {
109 * Called by devopen after it sets f->f_dev to our devsw entry.
110 * This opens the low-level device and sets f->f_devdata.
111 * This is declared with variable arguments...
114 net_open(struct open_file *f, ...)
117 char *devname; /* Device part of file name (or NULL). */
121 devname = va_arg(args, char*);
124 /* On first open, do netif open, mount, etc. */
125 if (netdev_opens == 0) {
126 /* Find network interface. */
127 if (netdev_sock < 0) {
128 netdev_sock = netif_open(devname);
129 if (netdev_sock < 0) {
130 printf("net_open: netif_open() failed\n");
134 printf("net_open: netif_open() succeeded\n");
136 if (rootip.s_addr == 0) {
137 /* Get root IP address, and path, etc. */
138 error = net_getparams(netdev_sock);
140 /* getparams makes its own noise */
141 netif_close(netdev_sock);
149 f->f_devdata = &netdev_sock;
160 printf("net_close: opens=%d\n", netdev_opens);
163 /* On last close, do netif close, etc. */
165 /* Extra close call? */
166 if (netdev_opens <= 0)
169 /* Not last close? */
170 if (netdev_opens > 0)
173 if (netdev_sock >= 0) {
175 printf("net_close: calling netif_close()\n");
176 netif_close(netdev_sock);
188 #define SUPPORT_BOOTP
191 * Get info for NFS boot: our IP address, our hostname,
192 * server IP address, and our root path on the server.
193 * There are two ways to do this: The old, Sun way,
194 * and the more modern, BOOTP way. (RFC951, RFC1048)
196 * The default is to use the Sun bootparams RPC
197 * (because that is what the kernel will do).
198 * MD code can make try_bootp initialied data,
199 * which will override this common definition.
205 extern n_long ip_convertaddr(char *p);
211 char buf[MAXHOSTNAMELEN];
212 char temp[FNAME_SIZE];
219 * Try to get boot info using BOOTP. If we succeed, then
220 * the server IP address, gateway, and root path will all
221 * be initialized. If any remain uninitialized, we will
222 * use RARP and RPC/bootparam (the Sun way) to get them.
225 bootp(sock, BOOTP_NONE);
226 if (myip.s_addr != 0)
229 printf("net_open: BOOTP failed, trying RARP/RPC...\n");
233 * Use RARP to get our IP address. This also sets our
234 * netmask to the "natural" default for our address.
236 if (rarp_getipaddress(sock)) {
237 printf("net_open: RARP failed\n");
240 printf("net_open: client addr: %s\n", inet_ntoa(myip));
242 /* Get our hostname, server IP address, gateway. */
243 if (bp_whoami(sock)) {
244 printf("net_open: bootparam/whoami RPC failed\n");
247 printf("net_open: client name: %s\n", hostname);
250 * Ignore the gateway from whoami (unreliable).
251 * Use the "gateway" parameter instead.
255 if (bp_getfile(sock, "gateway", &gateip, buf) == 0) {
256 /* Got it! Parse the netmask. */
257 smask = ip_convertaddr(buf);
261 printf("net_open: subnet mask: %s\n", intoa(netmask));
264 printf("net_open: net gateway: %s\n", inet_ntoa(gateip));
266 /* Get the root server and pathname. */
267 if (bp_getfile(sock, "root", &rootip, rootpath)) {
268 printf("net_open: bootparam/getfile RPC failed\n");
273 * If present, strip the server's address off of the rootpath
274 * before passing it along. This allows us to be compatible with
275 * the kernel's diskless (BOOTP_NFSROOT) booting conventions
277 for (i = 0; i < FNAME_SIZE && rootpath[i] != '\0'; i++)
278 if (rootpath[i] == ':')
280 if (i && i != FNAME_SIZE && rootpath[i] == ':') {
281 rootpath[i++] = '\0';
282 if (inet_addr(&rootpath[0]) != INADDR_NONE)
283 rootip.s_addr = inet_addr(&rootpath[0]);
284 bcopy(&rootpath[i], &temp[0], strlen(&rootpath[i])+1);
285 bcopy(&temp[0], &rootpath[0], strlen(&rootpath[i])+1);
287 printf("net_open: server addr: %s\n", inet_ntoa(rootip));
288 printf("net_open: server path: %s\n", rootpath);
290 d = socktodesc(sock);
291 setenv("boot.netif.ip", inet_ntoa(myip), 1);
292 setenv("boot.netif.netmask", intoa(netmask), 1);
293 setenv("boot.netif.gateway", inet_ntoa(gateip), 1);
294 setenv("boot.netif.hwaddr", ether_sprintf(d->myea), 1);
295 setenv("boot.nfsroot.server", inet_ntoa(rootip), 1);
296 setenv("boot.nfsroot.path", rootpath, 1);
302 net_print(int verbose)