1 /* $NetBSD: dev_net.c,v 1.23 2008/04/28 20:24:06 martin Exp $ */
4 * Copyright (c) 1997 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
36 * This module implements a "raw device" interface suitable for
37 * use by the stand-alone I/O library NFS code. This interface
38 * does not support any "block" access, and exists only for the
39 * purpose of initializing the network interface, getting boot
40 * parameters, and performing the NFS mount.
42 * At open time, this does:
44 * find interface - netif_open()
45 * RARP for IP address - rarp_getipaddress()
46 * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...)
47 * RPC/mountd - nfs_mount(sock, ip, path)
49 * the root file handle from mountd is saved in a global
50 * for use by the NFS open code (NFS/lookup).
53 #include <machine/stdarg.h>
54 #include <sys/param.h>
55 #include <sys/socket.h>
57 #include <netinet/in.h>
58 #include <netinet/in_systm.h>
65 #include <bootparam.h>
68 #include "bootstrap.h"
74 static char *netdev_name;
75 static int netdev_sock = -1;
76 static int netdev_opens;
78 static int net_init(void);
79 static int net_open(struct open_file *, ...);
80 static int net_close(struct open_file *);
81 static void net_cleanup(void);
82 static int net_strategy();
83 static void net_print(int);
85 static int net_getparams(int sock);
87 struct devsw netdev = {
107 * Called by devopen after it sets f->f_dev to our devsw entry.
108 * This opens the low-level device and sets f->f_devdata.
109 * This is declared with variable arguments...
112 net_open(struct open_file *f, ...)
115 char *devname; /* Device part of file name (or NULL). */
119 devname = va_arg(args, char*);
122 #ifdef NETIF_OPEN_CLOSE_ONCE
123 /* Before opening another interface, close the previous one first. */
124 if (netdev_sock >= 0 && strcmp(devname, netdev_name) != 0)
128 /* On first open, do netif open, mount, etc. */
129 if (netdev_opens == 0) {
130 /* Find network interface. */
131 if (netdev_sock < 0) {
132 netdev_sock = netif_open(devname);
133 if (netdev_sock < 0) {
134 printf("net_open: netif_open() failed\n");
137 netdev_name = strdup(devname);
140 printf("net_open: netif_open() succeeded\n");
143 if (rootip.s_addr == 0) {
144 /* Get root IP address, and path, etc. */
145 error = net_getparams(netdev_sock);
147 /* getparams makes its own noise */
149 netif_close(netdev_sock);
156 f->f_devdata = &netdev_sock;
161 net_close(struct open_file *f)
166 printf("net_close: opens=%d\n", netdev_opens);
171 #ifndef NETIF_OPEN_CLOSE_ONCE
172 /* Extra close call? */
173 if (netdev_opens <= 0)
176 /* Not last close? */
177 if (netdev_opens > 0)
179 /* On last close, do netif close, etc. */
182 printf("net_close: calling net_cleanup()\n");
193 if (netdev_sock >= 0) {
196 printf("net_cleanup: calling netif_close()\n");
200 netif_close(netdev_sock);
212 #define SUPPORT_BOOTP
215 * Get info for NFS boot: our IP address, our hostname,
216 * server IP address, and our root path on the server.
217 * There are two ways to do this: The old, Sun way,
218 * and the more modern, BOOTP way. (RFC951, RFC1048)
220 * The default is to use the Sun bootparams RPC
221 * (because that is what the kernel will do).
222 * MD code can make try_bootp initialied data,
223 * which will override this common definition.
229 extern n_long ip_convertaddr(char *p);
232 net_getparams(int sock)
234 char buf[MAXHOSTNAMELEN];
235 char temp[FNAME_SIZE];
242 * Try to get boot info using BOOTP. If we succeed, then
243 * the server IP address, gateway, and root path will all
244 * be initialized. If any remain uninitialized, we will
245 * use RARP and RPC/bootparam (the Sun way) to get them.
248 bootp(sock, BOOTP_NONE);
249 if (myip.s_addr != 0)
253 printf("net_open: BOOTP failed, trying RARP/RPC...\n");
258 * Use RARP to get our IP address. This also sets our
259 * netmask to the "natural" default for our address.
261 if (rarp_getipaddress(sock)) {
262 printf("net_open: RARP failed\n");
265 printf("net_open: client addr: %s\n", inet_ntoa(myip));
267 /* Get our hostname, server IP address, gateway. */
268 if (bp_whoami(sock)) {
269 printf("net_open: bootparam/whoami RPC failed\n");
274 printf("net_open: client name: %s\n", hostname);
278 * Ignore the gateway from whoami (unreliable).
279 * Use the "gateway" parameter instead.
283 if (bp_getfile(sock, "gateway", &gateip, buf) == 0) {
284 /* Got it! Parse the netmask. */
285 smask = ip_convertaddr(buf);
291 printf("net_open: subnet mask: %s\n", intoa(netmask));
295 if (gateip.s_addr && debug)
296 printf("net_open: net gateway: %s\n", inet_ntoa(gateip));
299 /* Get the root server and pathname. */
300 if (bp_getfile(sock, "root", &rootip, rootpath)) {
301 printf("net_open: bootparam/getfile RPC failed\n");
306 * If present, strip the server's address off of the rootpath
307 * before passing it along. This allows us to be compatible with
308 * the kernel's diskless (BOOTP_NFSROOT) booting conventions
310 for (i = 0; rootpath[i] != '\0' && i < FNAME_SIZE; i++)
311 if (rootpath[i] == ':')
313 if (i && i != FNAME_SIZE && rootpath[i] == ':') {
314 rootpath[i++] = '\0';
315 if (inet_addr(&rootpath[0]) != INADDR_NONE)
316 rootip.s_addr = inet_addr(&rootpath[0]);
317 bcopy(&rootpath[i], &temp[0], strlen(&rootpath[i])+1);
318 bcopy(&temp[0], &rootpath[0], strlen(&rootpath[i])+1);
322 printf("net_open: server addr: %s\n", inet_ntoa(rootip));
323 printf("net_open: server path: %s\n", rootpath);
327 d = socktodesc(sock);
328 sprintf(temp, "%6D", d->myea, ":");
329 setenv("boot.netif.ip", inet_ntoa(myip), 1);
330 setenv("boot.netif.netmask", intoa(netmask), 1);
331 setenv("boot.netif.gateway", inet_ntoa(gateip), 1);
332 setenv("boot.netif.hwaddr", temp, 1);
333 setenv("boot.nfsroot.server", inet_ntoa(rootip), 1);
334 setenv("boot.nfsroot.path", rootpath, 1);
340 net_print(int verbose)
342 struct netif_driver *drv;
346 for (d = 0; netif_drivers[d]; d++) {
347 drv = netif_drivers[d];
348 for (i = 0; i < drv->netif_nifs; i++) {
349 printf("\t%s%d:", "net", cnt++);
351 printf(" (%s%d)", drv->netif_bname,
352 drv->netif_ifs[i].dif_unit);