2 * $FreeBSD: src/sys/boot/common/dev_net.c,v 1.6.2.5 2001/03/04 04:44:42 obrien Exp $
3 * From: $NetBSD: dev_net.c,v 1.12 1997/12/10 20:38:37 gwr Exp $
7 * Copyright (c) 1997 The NetBSD Foundation, Inc.
10 * This code is derived from software contributed to The NetBSD Foundation
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14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. All advertising materials mentioning features or use of this software
22 * must display the following acknowledgement:
23 * This product includes software developed by the NetBSD
24 * Foundation, Inc. and its contributors.
25 * 4. Neither the name of The NetBSD Foundation nor the names of its
26 * contributors may be used to endorse or promote products derived
27 * from this software without specific prior written permission.
29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
39 * POSSIBILITY OF SUCH DAMAGE.
43 * This module implements a "raw device" interface suitable for
44 * use by the stand-alone I/O library NFS code. This interface
45 * does not support any "block" access, and exists only for the
46 * purpose of initializing the network interface, getting boot
47 * parameters, and performing the NFS mount.
49 * At open time, this does:
51 * find interface - netif_open()
52 * RARP for IP address - rarp_getipaddress()
53 * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...)
54 * RPC/mountd - nfs_mount(sock, ip, path)
56 * the root file handle from mountd is saved in a global
57 * for use by the NFS open code (NFS/lookup).
60 #include <machine/stdarg.h>
61 #include <sys/param.h>
62 #include <sys/socket.h>
64 #include <netinet/in.h>
65 #include <netinet/in_systm.h>
72 #include <bootparam.h>
75 #include "bootstrap.h"
79 static int netdev_sock = -1;
80 static int netdev_opens;
82 static int net_init(void);
83 static int net_open(struct open_file *, ...);
84 static int net_close(struct open_file *);
85 static int net_strategy();
86 static void net_print(int);
88 static int net_getparams(int sock);
90 struct devsw netdev = {
108 * Called by devopen after it sets f->f_dev to our devsw entry.
109 * This opens the low-level device and sets f->f_devdata.
110 * This is declared with variable arguments...
113 net_open(struct open_file *f, ...)
116 char *devname; /* Device part of file name (or NULL). */
120 devname = va_arg(args, char*);
123 /* On first open, do netif open, mount, etc. */
124 if (netdev_opens == 0) {
125 /* Find network interface. */
126 if (netdev_sock < 0) {
127 netdev_sock = netif_open(devname);
128 if (netdev_sock < 0) {
129 printf("net_open: netif_open() failed\n");
133 printf("net_open: netif_open() succeeded\n");
135 if (rootip.s_addr == 0) {
136 /* Get root IP address, and path, etc. */
137 error = net_getparams(netdev_sock);
139 /* getparams makes its own noise */
140 netif_close(netdev_sock);
148 f->f_devdata = &netdev_sock;
159 printf("net_close: opens=%d\n", netdev_opens);
162 /* On last close, do netif close, etc. */
164 /* Extra close call? */
165 if (netdev_opens <= 0)
168 /* Not last close? */
169 if (netdev_opens > 0)
172 if (netdev_sock >= 0) {
174 printf("net_close: calling netif_close()\n");
175 netif_close(netdev_sock);
187 #define SUPPORT_BOOTP
190 * Get info for NFS boot: our IP address, our hostname,
191 * server IP address, and our root path on the server.
192 * There are two ways to do this: The old, Sun way,
193 * and the more modern, BOOTP way. (RFC951, RFC1048)
195 * The default is to use the Sun bootparams RPC
196 * (because that is what the kernel will do).
197 * MD code can make try_bootp initialied data,
198 * which will override this common definition.
204 extern n_long ip_convertaddr(char *p);
210 char buf[MAXHOSTNAMELEN];
211 char temp[FNAME_SIZE];
217 * Try to get boot info using BOOTP. If we succeed, then
218 * the server IP address, gateway, and root path will all
219 * be initialized. If any remain uninitialized, we will
220 * use RARP and RPC/bootparam (the Sun way) to get them.
223 bootp(sock, BOOTP_NONE);
224 if (myip.s_addr != 0)
227 printf("net_open: BOOTP failed, trying RARP/RPC...\n");
231 * Use RARP to get our IP address. This also sets our
232 * netmask to the "natural" default for our address.
234 if (rarp_getipaddress(sock)) {
235 printf("net_open: RARP failed\n");
238 printf("net_open: client addr: %s\n", inet_ntoa(myip));
240 /* Get our hostname, server IP address, gateway. */
241 if (bp_whoami(sock)) {
242 printf("net_open: bootparam/whoami RPC failed\n");
245 printf("net_open: client name: %s\n", hostname);
248 * Ignore the gateway from whoami (unreliable).
249 * Use the "gateway" parameter instead.
253 if (bp_getfile(sock, "gateway", &gateip, buf) == 0) {
254 /* Got it! Parse the netmask. */
255 smask = ip_convertaddr(buf);
259 printf("net_open: subnet mask: %s\n", intoa(netmask));
262 printf("net_open: net gateway: %s\n", inet_ntoa(gateip));
264 /* Get the root server and pathname. */
265 if (bp_getfile(sock, "root", &rootip, rootpath)) {
266 printf("net_open: bootparam/getfile RPC failed\n");
270 printf("net_open: server addr: %s\n", inet_ntoa(rootip));
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
278 for(i=0; i<FNAME_SIZE; i++)
279 if(rootpath[i] == ':')
281 if(i && i != FNAME_SIZE) {
283 bcopy(&rootpath[i], &temp[0], strlen(&rootpath[i])+1);
284 bcopy(&temp[0], &rootpath[0], strlen(&rootpath[i])+1);
286 printf("net_open: server path: %s\n", rootpath);
291 net_print(int verbose)