Expand PMF_FN_* macros.
[netbsd-mini2440.git] / sys / lib / libsa / dev_net.c
blobfe48fb931368bc064b59c933c8b556beb3cc5562
1 /* $NetBSD: dev_net.c,v 1.23 2008/04/28 20:24:06 martin Exp $ */
3 /*-
4 * Copyright (c) 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Gordon W. Ross.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
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.
33 * This module implements a "raw device" interface suitable for
34 * use by the stand-alone I/O library NFS code. This interface
35 * does not support any "block" access, and exists only for the
36 * purpose of initializing the network interface, getting boot
37 * parameters, and performing the NFS mount.
39 * At open time, this does:
41 * find interface - netif_open()
42 * RARP for IP address - rarp_getipaddress()
43 * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...)
44 * RPC/mountd - nfs_mount(sock, ip, path)
46 * the root file handle from mountd is saved in a global
47 * for use by the NFS open code (NFS/lookup).
50 #include <machine/stdarg.h>
51 #include <sys/param.h>
52 #include <sys/socket.h>
53 #include <net/if.h>
54 #include <netinet/in.h>
55 #include <netinet/in_systm.h>
57 #include <lib/libkern/libkern.h>
59 #include "stand.h"
60 #include "net.h"
61 #include "netif.h"
62 #include "nfs.h"
63 #include "bootparam.h"
64 #include "dev_net.h"
65 #ifdef SUPPORT_BOOTP
66 #include "bootp.h"
67 #endif
69 extern int nfs_root_node[]; /* XXX - get from nfs_mount() */
71 static int netdev_sock = -1;
72 static int netdev_opens;
74 static int net_getparams(int);
77 * Called by devopen after it sets f->f_dev to our devsw entry.
78 * This opens the low-level device and sets f->f_devdata.
79 * This is declared with variable arguments...
81 int
82 net_open(struct open_file *f, ...)
84 va_list ap;
85 char *devname; /* Device part of file name (or NULL). */
86 int error = 0;
88 va_start(ap, f);
89 devname = va_arg(ap, char *);
90 va_end(ap);
92 #ifdef NETIF_DEBUG
93 if (debug)
94 printf("%s\n", devname);
95 #endif
97 /* On first open, do netif open, mount, etc. */
98 if (netdev_opens == 0) {
99 /* Find network interface. */
100 if (netdev_sock < 0) {
101 netdev_sock = netif_open(devname);
102 if (netdev_sock < 0) {
103 printf("netif_open() failed\n");
104 return ENXIO;
106 #ifdef NETIF_DEBUG
107 if (debug)
108 printf("netif_open() succeeded\n");
109 #endif
111 if (rootip.s_addr == 0) {
112 /* Get root IP address, and path, etc. */
113 error = net_getparams(netdev_sock);
114 if (error) {
115 /* getparams makes its own noise */
116 goto fail;
118 /* Get the NFS file handle (mountd). */
119 error = nfs_mount(netdev_sock, rootip, rootpath);
120 if (error) {
121 printf("NFS mount error=%d\n", error);
122 rootip.s_addr = 0;
123 fail:
124 netif_close(netdev_sock);
125 netdev_sock = -1;
126 return error;
128 #ifdef NETIF_DEBUG
129 if (debug)
130 printf("NFS mount succeeded\n");
131 #endif
134 netdev_opens++;
135 f->f_devdata = nfs_root_node;
136 return error;
140 net_close(struct open_file *f)
143 #ifdef NETIF_DEBUG
144 if (debug)
145 printf("net_close: opens=%d\n", netdev_opens);
146 #endif
148 /* On last close, do netif close, etc. */
149 f->f_devdata = NULL;
150 /* Extra close call? */
151 if (netdev_opens <= 0)
152 return 0;
153 netdev_opens--;
154 /* Not last close? */
155 if (netdev_opens > 0)
156 return 0;
157 rootip.s_addr = 0;
158 if (netdev_sock >= 0) {
159 #ifdef NETIF_DEBUG
160 if (debug)
161 printf("net_close: calling netif_close()\n");
162 #endif
163 netif_close(netdev_sock);
164 netdev_sock = -1;
166 return 0;
170 net_ioctl(struct open_file *f, u_long cmd, void *data)
173 return EIO;
177 net_strategy(void *devdata, int rw, daddr_t blk, size_t size, void *buf,
178 size_t *rsize)
181 return EIO;
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)
191 * The default is to use the Sun bootparams RPC
192 * (because that is what the kernel will do).
193 * MD code can make try_bootp initialied data,
194 * which will override this common definition.
196 #ifdef SUPPORT_BOOTP
197 int try_bootp;
198 #endif
200 static int
201 net_getparams(int sock)
203 char buf[MAXHOSTNAMELEN];
204 n_long smask;
206 #ifdef SUPPORT_BOOTP
208 * Try to get boot info using BOOTP. If we succeed, then
209 * the server IP address, gateway, and root path will all
210 * be initialized. If any remain uninitialized, we will
211 * use RARP and RPC/bootparam (the Sun way) to get them.
213 if (try_bootp)
214 bootp(sock);
215 if (myip.s_addr != 0)
216 return 0;
217 #ifdef NETIF_DEBUG
218 if (debug)
219 printf("BOOTP failed, trying RARP/RPC...\n");
220 #endif
221 #endif
224 * Use RARP to get our IP address. This also sets our
225 * netmask to the "natural" default for our address.
227 if (rarp_getipaddress(sock)) {
228 printf("RARP failed\n");
229 return EIO;
231 #ifdef NETIF_DEBUG
232 if (debug)
233 printf("client addr: %s\n", inet_ntoa(myip));
234 #endif
236 /* Get our hostname, server IP address, gateway. */
237 if (bp_whoami(sock)) {
238 printf("bootparam/whoami RPC failed\n");
239 return EIO;
241 #ifdef NETIF_DEBUG
242 if (debug)
243 printf("client name: %s\n", hostname);
244 #endif
247 * Ignore the gateway from whoami (unreliable).
248 * Use the "gateway" parameter instead.
250 smask = 0;
251 gateip.s_addr = 0;
252 if (bp_getfile(sock, "gateway", &gateip, buf)) {
253 printf("nfs_open: gateway bootparam missing\n");
254 } else {
255 /* Got it! Parse the netmask. */
256 smask = inet_addr(buf);
258 if (smask) {
259 netmask = smask;
260 #ifdef NETIF_DEBUG
261 if (debug)
262 printf("subnet mask: %s\n", intoa(netmask));
263 #endif
265 #ifdef NETIF_DEBUG
266 if (debug)
267 if (gateip.s_addr)
268 printf("net gateway: %s\n", inet_ntoa(gateip));
269 #endif
271 /* Get the root server and pathname. */
272 if (bp_getfile(sock, "root", &rootip, rootpath)) {
273 printf("bootparam/getfile RPC failed\n");
274 return EIO;
277 #ifdef NETIF_DEBUG
278 if (debug) {
279 printf("server addr: %s\n", inet_ntoa(rootip));
280 printf("server path: %s\n", rootpath);
282 #endif
284 return 0;