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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Automatic Configuration of IP -- use DHCP, BOOTP, RARP, or |
4 | * user-supplied information to configure own IP address and routes. | |
5 | * | |
6 | * Copyright (C) 1996-1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz> | |
7 | * | |
8 | * Derived from network configuration code in fs/nfs/nfsroot.c, | |
9 | * originally Copyright (C) 1995, 1996 Gero Kuhlmann and me. | |
10 | * | |
11 | * BOOTP rewritten to construct and analyse packets itself instead | |
12 | * of misusing the IP layer. num_bugs_causing_wrong_arp_replies--; | |
13 | * -- MJ, December 1998 | |
e905a9ed | 14 | * |
1da177e4 LT |
15 | * Fixed ip_auto_config_setup calling at startup in the new "Linker Magic" |
16 | * initialization scheme. | |
17 | * - Arnaldo Carvalho de Melo <acme@conectiva.com.br>, 08/11/1999 | |
18 | * | |
19 | * DHCP support added. To users this looks like a whole separate | |
20 | * protocol, but we know it's just a bag on the side of BOOTP. | |
21 | * -- Chip Salzenberg <chip@valinux.com>, May 2000 | |
22 | * | |
23 | * Ported DHCP support from 2.2.16 to 2.4.0-test4 | |
24 | * -- Eric Biederman <ebiederman@lnxi.com>, 30 Aug 2000 | |
25 | * | |
26 | * Merged changes from 2.2.19 into 2.4.3 | |
27 | * -- Eric Biederman <ebiederman@lnxi.com>, 22 April Aug 2001 | |
28 | * | |
29 | * Multiple Nameservers in /proc/net/pnp | |
30 | * -- Josef Siemes <jsiemes@web.de>, Aug 2002 | |
31 | */ | |
32 | ||
1da177e4 LT |
33 | #include <linux/types.h> |
34 | #include <linux/string.h> | |
35 | #include <linux/kernel.h> | |
36 | #include <linux/jiffies.h> | |
37 | #include <linux/random.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/utsname.h> | |
40 | #include <linux/in.h> | |
41 | #include <linux/if.h> | |
42 | #include <linux/inet.h> | |
14c85021 | 43 | #include <linux/inetdevice.h> |
1da177e4 LT |
44 | #include <linux/netdevice.h> |
45 | #include <linux/if_arp.h> | |
46 | #include <linux/skbuff.h> | |
47 | #include <linux/ip.h> | |
48 | #include <linux/socket.h> | |
49 | #include <linux/route.h> | |
50 | #include <linux/udp.h> | |
51 | #include <linux/proc_fs.h> | |
52 | #include <linux/seq_file.h> | |
53 | #include <linux/major.h> | |
54 | #include <linux/root_dev.h> | |
55 | #include <linux/delay.h> | |
43d60661 | 56 | #include <linux/nfs_fs.h> |
5a0e3ad6 | 57 | #include <linux/slab.h> |
bc3b2d7f | 58 | #include <linux/export.h> |
457c4cbc | 59 | #include <net/net_namespace.h> |
1da177e4 | 60 | #include <net/arp.h> |
c6e970a0 | 61 | #include <net/dsa.h> |
1da177e4 LT |
62 | #include <net/ip.h> |
63 | #include <net/ipconfig.h> | |
14c85021 | 64 | #include <net/route.h> |
1da177e4 | 65 | |
7c0f6ba6 | 66 | #include <linux/uaccess.h> |
1da177e4 LT |
67 | #include <net/checksum.h> |
68 | #include <asm/processor.h> | |
69 | ||
1da177e4 LT |
70 | #if defined(CONFIG_IP_PNP_DHCP) |
71 | #define IPCONFIG_DHCP | |
72 | #endif | |
73 | #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_DHCP) | |
74 | #define IPCONFIG_BOOTP | |
75 | #endif | |
76 | #if defined(CONFIG_IP_PNP_RARP) | |
77 | #define IPCONFIG_RARP | |
78 | #endif | |
79 | #if defined(IPCONFIG_BOOTP) || defined(IPCONFIG_RARP) | |
80 | #define IPCONFIG_DYNAMIC | |
81 | #endif | |
82 | ||
83 | /* Define the friendly delay before and after opening net devices */ | |
3fb72f1e MN |
84 | #define CONF_POST_OPEN 10 /* After opening: 10 msecs */ |
85 | #define CONF_CARRIER_TIMEOUT 120000 /* Wait for carrier timeout */ | |
1da177e4 LT |
86 | |
87 | /* Define the timeout for waiting for a DHCP/BOOTP/RARP reply */ | |
88 | #define CONF_OPEN_RETRIES 2 /* (Re)open devices twice */ | |
89 | #define CONF_SEND_RETRIES 6 /* Send six requests per open */ | |
1da177e4 LT |
90 | #define CONF_BASE_TIMEOUT (HZ*2) /* Initial timeout: 2 seconds */ |
91 | #define CONF_TIMEOUT_RANDOM (HZ) /* Maximum amount of randomization */ | |
92 | #define CONF_TIMEOUT_MULT *7/4 /* Rate of timeout growth */ | |
93 | #define CONF_TIMEOUT_MAX (HZ*30) /* Maximum allowed timeout */ | |
e905a9ed YH |
94 | #define CONF_NAMESERVERS_MAX 3 /* Maximum number of nameservers |
95 | - '3' from resolv.h */ | |
1da177e4 | 96 | |
09640e63 HH |
97 | #define NONE cpu_to_be32(INADDR_NONE) |
98 | #define ANY cpu_to_be32(INADDR_ANY) | |
1da177e4 LT |
99 | |
100 | /* | |
101 | * Public IP configuration | |
102 | */ | |
103 | ||
104 | /* This is used by platforms which might be able to set the ipconfig | |
105 | * variables using firmware environment vars. If this is set, it will | |
106 | * ignore such firmware variables. | |
107 | */ | |
108 | int ic_set_manually __initdata = 0; /* IPconfig parameters set manually */ | |
109 | ||
0d3979b9 | 110 | static int ic_enable __initdata; /* IP config enabled? */ |
1da177e4 LT |
111 | |
112 | /* Protocol choice */ | |
113 | int ic_proto_enabled __initdata = 0 | |
114 | #ifdef IPCONFIG_BOOTP | |
115 | | IC_BOOTP | |
116 | #endif | |
117 | #ifdef CONFIG_IP_PNP_DHCP | |
118 | | IC_USE_DHCP | |
119 | #endif | |
120 | #ifdef IPCONFIG_RARP | |
121 | | IC_RARP | |
122 | #endif | |
123 | ; | |
124 | ||
0d3979b9 | 125 | static int ic_host_name_set __initdata; /* Host name set by us? */ |
1da177e4 | 126 | |
5a874db4 AV |
127 | __be32 ic_myaddr = NONE; /* My IP address */ |
128 | static __be32 ic_netmask = NONE; /* Netmask for local subnet */ | |
129 | __be32 ic_gateway = NONE; /* Gateway IP address */ | |
1da177e4 | 130 | |
86ef7f9c | 131 | #ifdef IPCONFIG_DYNAMIC |
0b392be9 | 132 | static __be32 ic_addrservaddr = NONE; /* IP Address of the IP addresses'server */ |
86ef7f9c | 133 | #endif |
9dd4a13a | 134 | |
5a874db4 | 135 | __be32 ic_servaddr = NONE; /* Boot server IP address */ |
1da177e4 | 136 | |
5a874db4 | 137 | __be32 root_server_addr = NONE; /* Address of NFS server */ |
1da177e4 LT |
138 | u8 root_server_path[256] = { 0, }; /* Path to mount as root */ |
139 | ||
1b0b04f9 DM |
140 | /* vendor class identifier */ |
141 | static char vendor_class_identifier[253] __initdata; | |
62013dbb | 142 | |
26fb342c LR |
143 | #if defined(CONFIG_IP_PNP_DHCP) |
144 | static char dhcp_client_identifier[253] __initdata; | |
145 | #endif | |
146 | ||
1da177e4 LT |
147 | /* Persistent data: */ |
148 | ||
52b79e2b | 149 | #ifdef IPCONFIG_DYNAMIC |
1da177e4 | 150 | static int ic_proto_used; /* Protocol used, if any */ |
52b79e2b AB |
151 | #else |
152 | #define ic_proto_used 0 | |
153 | #endif | |
5a874db4 | 154 | static __be32 ic_nameservers[CONF_NAMESERVERS_MAX]; /* DNS Server IP addresses */ |
1da177e4 LT |
155 | static u8 ic_domain[64]; /* DNS (not NIS) domain name */ |
156 | ||
157 | /* | |
158 | * Private state. | |
159 | */ | |
160 | ||
161 | /* Name of user-selected boot device */ | |
162 | static char user_dev_name[IFNAMSIZ] __initdata = { 0, }; | |
163 | ||
164 | /* Protocols supported by available interfaces */ | |
0d3979b9 | 165 | static int ic_proto_have_if __initdata; |
1da177e4 | 166 | |
9643f455 | 167 | /* MTU for boot device */ |
0d3979b9 | 168 | static int ic_dev_mtu __initdata; |
9643f455 | 169 | |
1da177e4 LT |
170 | #ifdef IPCONFIG_DYNAMIC |
171 | static DEFINE_SPINLOCK(ic_recv_lock); | |
0d3979b9 | 172 | static volatile int ic_got_reply __initdata; /* Proto(s) that replied */ |
1da177e4 LT |
173 | #endif |
174 | #ifdef IPCONFIG_DHCP | |
0d3979b9 | 175 | static int ic_dhcp_msgtype __initdata; /* DHCP msg type received */ |
1da177e4 LT |
176 | #endif |
177 | ||
178 | ||
179 | /* | |
180 | * Network devices | |
181 | */ | |
182 | ||
183 | struct ic_device { | |
184 | struct ic_device *next; | |
185 | struct net_device *dev; | |
186 | unsigned short flags; | |
187 | short able; | |
5a874db4 | 188 | __be32 xid; |
1da177e4 LT |
189 | }; |
190 | ||
0d3979b9 | 191 | static struct ic_device *ic_first_dev __initdata; /* List of open device */ |
2647cffb | 192 | static struct ic_device *ic_dev __initdata; /* Selected device */ |
1da177e4 | 193 | |
3fb72f1e | 194 | static bool __init ic_is_init_dev(struct net_device *dev) |
964ad81c | 195 | { |
3fb72f1e MN |
196 | if (dev->flags & IFF_LOOPBACK) |
197 | return false; | |
198 | return user_dev_name[0] ? !strcmp(dev->name, user_dev_name) : | |
964ad81c DM |
199 | (!(dev->flags & IFF_LOOPBACK) && |
200 | (dev->flags & (IFF_POINTOPOINT|IFF_BROADCAST)) && | |
3fb72f1e | 201 | strncmp(dev->name, "dummy", 5)); |
964ad81c DM |
202 | } |
203 | ||
1da177e4 LT |
204 | static int __init ic_open_devs(void) |
205 | { | |
206 | struct ic_device *d, **last; | |
207 | struct net_device *dev; | |
208 | unsigned short oflags; | |
5e404cd6 | 209 | unsigned long start, next_msg; |
1da177e4 LT |
210 | |
211 | last = &ic_first_dev; | |
6756ae4b | 212 | rtnl_lock(); |
1da177e4 | 213 | |
728c0208 | 214 | /* bring loopback and DSA master network devices up first */ |
0cc217e1 | 215 | for_each_netdev(&init_net, dev) { |
728c0208 | 216 | if (!(dev->flags & IFF_LOOPBACK) && !netdev_uses_dsa(dev)) |
0cc217e1 EB |
217 | continue; |
218 | if (dev_change_flags(dev, dev->flags | IFF_UP) < 0) | |
058bd4d2 | 219 | pr_err("IP-Config: Failed to open %s\n", dev->name); |
0cc217e1 | 220 | } |
1da177e4 | 221 | |
881d966b | 222 | for_each_netdev(&init_net, dev) { |
3fb72f1e | 223 | if (ic_is_init_dev(dev)) { |
1da177e4 LT |
224 | int able = 0; |
225 | if (dev->mtu >= 364) | |
226 | able |= IC_BOOTP; | |
227 | else | |
09605cc1 | 228 | pr_warn("DHCP/BOOTP: Ignoring device %s, MTU %d too small\n", |
058bd4d2 | 229 | dev->name, dev->mtu); |
1da177e4 LT |
230 | if (!(dev->flags & IFF_NOARP)) |
231 | able |= IC_RARP; | |
232 | able &= ic_proto_enabled; | |
233 | if (ic_proto_enabled && !able) | |
234 | continue; | |
235 | oflags = dev->flags; | |
236 | if (dev_change_flags(dev, oflags | IFF_UP) < 0) { | |
058bd4d2 JP |
237 | pr_err("IP-Config: Failed to open %s\n", |
238 | dev->name); | |
1da177e4 LT |
239 | continue; |
240 | } | |
241 | if (!(d = kmalloc(sizeof(struct ic_device), GFP_KERNEL))) { | |
6756ae4b | 242 | rtnl_unlock(); |
964ad81c | 243 | return -ENOMEM; |
1da177e4 LT |
244 | } |
245 | d->dev = dev; | |
246 | *last = d; | |
247 | last = &d->next; | |
248 | d->flags = oflags; | |
249 | d->able = able; | |
250 | if (able & IC_BOOTP) | |
5a874db4 | 251 | get_random_bytes(&d->xid, sizeof(__be32)); |
1da177e4 LT |
252 | else |
253 | d->xid = 0; | |
254 | ic_proto_have_if |= able; | |
09605cc1 BS |
255 | pr_debug("IP-Config: %s UP (able=%d, xid=%08x)\n", |
256 | dev->name, able, d->xid); | |
1da177e4 LT |
257 | } |
258 | } | |
3fb72f1e | 259 | |
cd7816d1 GF |
260 | /* no point in waiting if we could not bring up at least one device */ |
261 | if (!ic_first_dev) | |
262 | goto have_carrier; | |
263 | ||
3fb72f1e MN |
264 | /* wait for a carrier on at least one device */ |
265 | start = jiffies; | |
5e404cd6 | 266 | next_msg = start + msecs_to_jiffies(CONF_CARRIER_TIMEOUT/12); |
c72c95a0 HS |
267 | while (time_before(jiffies, start + |
268 | msecs_to_jiffies(CONF_CARRIER_TIMEOUT))) { | |
5e404cd6 PG |
269 | int wait, elapsed; |
270 | ||
3fb72f1e MN |
271 | for_each_netdev(&init_net, dev) |
272 | if (ic_is_init_dev(dev) && netif_carrier_ok(dev)) | |
273 | goto have_carrier; | |
274 | ||
275 | msleep(1); | |
5e404cd6 | 276 | |
357137a4 | 277 | if (time_before(jiffies, next_msg)) |
5e404cd6 PG |
278 | continue; |
279 | ||
280 | elapsed = jiffies_to_msecs(jiffies - start); | |
281 | wait = (CONF_CARRIER_TIMEOUT - elapsed + 500)/1000; | |
282 | pr_info("Waiting up to %d more seconds for network.\n", wait); | |
283 | next_msg = jiffies + msecs_to_jiffies(CONF_CARRIER_TIMEOUT/12); | |
3fb72f1e MN |
284 | } |
285 | have_carrier: | |
6756ae4b | 286 | rtnl_unlock(); |
1da177e4 LT |
287 | |
288 | *last = NULL; | |
289 | ||
290 | if (!ic_first_dev) { | |
291 | if (user_dev_name[0]) | |
058bd4d2 JP |
292 | pr_err("IP-Config: Device `%s' not found\n", |
293 | user_dev_name); | |
1da177e4 | 294 | else |
058bd4d2 | 295 | pr_err("IP-Config: No network devices available\n"); |
964ad81c | 296 | return -ENODEV; |
1da177e4 LT |
297 | } |
298 | return 0; | |
299 | } | |
300 | ||
301 | static void __init ic_close_devs(void) | |
302 | { | |
303 | struct ic_device *d, *next; | |
304 | struct net_device *dev; | |
305 | ||
6756ae4b | 306 | rtnl_lock(); |
1da177e4 LT |
307 | next = ic_first_dev; |
308 | while ((d = next)) { | |
309 | next = d->next; | |
310 | dev = d->dev; | |
ffefb6f4 | 311 | if (d != ic_dev && !netdev_uses_dsa(dev)) { |
09605cc1 | 312 | pr_debug("IP-Config: Downing %s\n", dev->name); |
1da177e4 LT |
313 | dev_change_flags(dev, d->flags); |
314 | } | |
315 | kfree(d); | |
316 | } | |
6756ae4b | 317 | rtnl_unlock(); |
1da177e4 LT |
318 | } |
319 | ||
320 | /* | |
321 | * Interface to various network functions. | |
322 | */ | |
323 | ||
324 | static inline void | |
5a874db4 | 325 | set_sockaddr(struct sockaddr_in *sin, __be32 addr, __be16 port) |
1da177e4 LT |
326 | { |
327 | sin->sin_family = AF_INET; | |
328 | sin->sin_addr.s_addr = addr; | |
329 | sin->sin_port = port; | |
330 | } | |
331 | ||
9643f455 | 332 | static int __init ic_devinet_ioctl(unsigned int cmd, struct ifreq *arg) |
1da177e4 LT |
333 | { |
334 | int res; | |
335 | ||
336 | mm_segment_t oldfs = get_fs(); | |
337 | set_fs(get_ds()); | |
e5b13cb1 | 338 | res = devinet_ioctl(&init_net, cmd, (struct ifreq __user *) arg); |
1da177e4 LT |
339 | set_fs(oldfs); |
340 | return res; | |
341 | } | |
342 | ||
9643f455 CF |
343 | static int __init ic_dev_ioctl(unsigned int cmd, struct ifreq *arg) |
344 | { | |
345 | int res; | |
346 | ||
347 | mm_segment_t oldfs = get_fs(); | |
348 | set_fs(get_ds()); | |
349 | res = dev_ioctl(&init_net, cmd, (struct ifreq __user *) arg); | |
350 | set_fs(oldfs); | |
351 | return res; | |
352 | } | |
353 | ||
1da177e4 LT |
354 | static int __init ic_route_ioctl(unsigned int cmd, struct rtentry *arg) |
355 | { | |
356 | int res; | |
357 | ||
358 | mm_segment_t oldfs = get_fs(); | |
359 | set_fs(get_ds()); | |
1bad118a | 360 | res = ip_rt_ioctl(&init_net, cmd, (void __user *) arg); |
1da177e4 LT |
361 | set_fs(oldfs); |
362 | return res; | |
363 | } | |
364 | ||
365 | /* | |
366 | * Set up interface addresses and routes. | |
367 | */ | |
368 | ||
369 | static int __init ic_setup_if(void) | |
370 | { | |
371 | struct ifreq ir; | |
372 | struct sockaddr_in *sin = (void *) &ir.ifr_ifru.ifru_addr; | |
373 | int err; | |
374 | ||
375 | memset(&ir, 0, sizeof(ir)); | |
2647cffb | 376 | strcpy(ir.ifr_ifrn.ifrn_name, ic_dev->dev->name); |
1da177e4 | 377 | set_sockaddr(sin, ic_myaddr, 0); |
9643f455 | 378 | if ((err = ic_devinet_ioctl(SIOCSIFADDR, &ir)) < 0) { |
058bd4d2 JP |
379 | pr_err("IP-Config: Unable to set interface address (%d)\n", |
380 | err); | |
1da177e4 LT |
381 | return -1; |
382 | } | |
383 | set_sockaddr(sin, ic_netmask, 0); | |
9643f455 | 384 | if ((err = ic_devinet_ioctl(SIOCSIFNETMASK, &ir)) < 0) { |
058bd4d2 JP |
385 | pr_err("IP-Config: Unable to set interface netmask (%d)\n", |
386 | err); | |
1da177e4 LT |
387 | return -1; |
388 | } | |
389 | set_sockaddr(sin, ic_myaddr | ~ic_netmask, 0); | |
9643f455 | 390 | if ((err = ic_devinet_ioctl(SIOCSIFBRDADDR, &ir)) < 0) { |
058bd4d2 JP |
391 | pr_err("IP-Config: Unable to set interface broadcast address (%d)\n", |
392 | err); | |
1da177e4 LT |
393 | return -1; |
394 | } | |
9643f455 CF |
395 | /* Handle the case where we need non-standard MTU on the boot link (a network |
396 | * using jumbo frames, for instance). If we can't set the mtu, don't error | |
397 | * out, we'll try to muddle along. | |
398 | */ | |
399 | if (ic_dev_mtu != 0) { | |
2647cffb | 400 | strcpy(ir.ifr_name, ic_dev->dev->name); |
9643f455 CF |
401 | ir.ifr_mtu = ic_dev_mtu; |
402 | if ((err = ic_dev_ioctl(SIOCSIFMTU, &ir)) < 0) | |
058bd4d2 JP |
403 | pr_err("IP-Config: Unable to set interface mtu to %d (%d)\n", |
404 | ic_dev_mtu, err); | |
9643f455 | 405 | } |
1da177e4 LT |
406 | return 0; |
407 | } | |
408 | ||
409 | static int __init ic_setup_routes(void) | |
410 | { | |
411 | /* No need to setup device routes, only the default route... */ | |
412 | ||
5a874db4 | 413 | if (ic_gateway != NONE) { |
1da177e4 LT |
414 | struct rtentry rm; |
415 | int err; | |
416 | ||
417 | memset(&rm, 0, sizeof(rm)); | |
418 | if ((ic_gateway ^ ic_myaddr) & ic_netmask) { | |
058bd4d2 | 419 | pr_err("IP-Config: Gateway not on directly connected network\n"); |
1da177e4 LT |
420 | return -1; |
421 | } | |
422 | set_sockaddr((struct sockaddr_in *) &rm.rt_dst, 0, 0); | |
423 | set_sockaddr((struct sockaddr_in *) &rm.rt_genmask, 0, 0); | |
424 | set_sockaddr((struct sockaddr_in *) &rm.rt_gateway, ic_gateway, 0); | |
425 | rm.rt_flags = RTF_UP | RTF_GATEWAY; | |
426 | if ((err = ic_route_ioctl(SIOCADDRT, &rm)) < 0) { | |
058bd4d2 JP |
427 | pr_err("IP-Config: Cannot add default route (%d)\n", |
428 | err); | |
1da177e4 LT |
429 | return -1; |
430 | } | |
431 | } | |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
436 | /* | |
437 | * Fill in default values for all missing parameters. | |
438 | */ | |
439 | ||
440 | static int __init ic_defaults(void) | |
441 | { | |
442 | /* | |
443 | * At this point we have no userspace running so need not | |
444 | * claim locks on system_utsname | |
445 | */ | |
e905a9ed | 446 | |
1da177e4 | 447 | if (!ic_host_name_set) |
673d57e7 | 448 | sprintf(init_utsname()->nodename, "%pI4", &ic_myaddr); |
1da177e4 | 449 | |
5a874db4 | 450 | if (root_server_addr == NONE) |
1da177e4 LT |
451 | root_server_addr = ic_servaddr; |
452 | ||
5a874db4 | 453 | if (ic_netmask == NONE) { |
1da177e4 LT |
454 | if (IN_CLASSA(ntohl(ic_myaddr))) |
455 | ic_netmask = htonl(IN_CLASSA_NET); | |
456 | else if (IN_CLASSB(ntohl(ic_myaddr))) | |
457 | ic_netmask = htonl(IN_CLASSB_NET); | |
458 | else if (IN_CLASSC(ntohl(ic_myaddr))) | |
459 | ic_netmask = htonl(IN_CLASSC_NET); | |
460 | else { | |
058bd4d2 JP |
461 | pr_err("IP-Config: Unable to guess netmask for address %pI4\n", |
462 | &ic_myaddr); | |
1da177e4 LT |
463 | return -1; |
464 | } | |
09605cc1 BS |
465 | pr_notice("IP-Config: Guessing netmask %pI4\n", |
466 | &ic_netmask); | |
1da177e4 LT |
467 | } |
468 | ||
469 | return 0; | |
470 | } | |
471 | ||
472 | /* | |
473 | * RARP support. | |
474 | */ | |
475 | ||
476 | #ifdef IPCONFIG_RARP | |
477 | ||
f2ccd8fa | 478 | static int ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev); |
1da177e4 LT |
479 | |
480 | static struct packet_type rarp_packet_type __initdata = { | |
09640e63 | 481 | .type = cpu_to_be16(ETH_P_RARP), |
1da177e4 LT |
482 | .func = ic_rarp_recv, |
483 | }; | |
484 | ||
45e741b8 | 485 | static inline void __init ic_rarp_init(void) |
1da177e4 LT |
486 | { |
487 | dev_add_pack(&rarp_packet_type); | |
488 | } | |
489 | ||
45e741b8 | 490 | static inline void __init ic_rarp_cleanup(void) |
1da177e4 LT |
491 | { |
492 | dev_remove_pack(&rarp_packet_type); | |
493 | } | |
494 | ||
495 | /* | |
496 | * Process received RARP packet. | |
497 | */ | |
498 | static int __init | |
f2ccd8fa | 499 | ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) |
1da177e4 LT |
500 | { |
501 | struct arphdr *rarp; | |
502 | unsigned char *rarp_ptr; | |
5a874db4 | 503 | __be32 sip, tip; |
6b436d33 | 504 | unsigned char *tha; /* t for "target" */ |
1da177e4 LT |
505 | struct ic_device *d; |
506 | ||
721499e8 | 507 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
508 | goto drop; |
509 | ||
51456b29 IM |
510 | skb = skb_share_check(skb, GFP_ATOMIC); |
511 | if (!skb) | |
1da177e4 LT |
512 | return NET_RX_DROP; |
513 | ||
514 | if (!pskb_may_pull(skb, sizeof(struct arphdr))) | |
515 | goto drop; | |
516 | ||
517 | /* Basic sanity checks can be done without the lock. */ | |
9c70220b | 518 | rarp = (struct arphdr *)skb_transport_header(skb); |
1da177e4 LT |
519 | |
520 | /* If this test doesn't pass, it's not IP, or we should | |
521 | * ignore it anyway. | |
522 | */ | |
523 | if (rarp->ar_hln != dev->addr_len || dev->type != ntohs(rarp->ar_hrd)) | |
524 | goto drop; | |
525 | ||
526 | /* If it's not a RARP reply, delete it. */ | |
527 | if (rarp->ar_op != htons(ARPOP_RREPLY)) | |
528 | goto drop; | |
529 | ||
530 | /* If it's not Ethernet, delete it. */ | |
531 | if (rarp->ar_pro != htons(ETH_P_IP)) | |
532 | goto drop; | |
533 | ||
988b7050 | 534 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) |
1da177e4 LT |
535 | goto drop; |
536 | ||
537 | /* OK, it is all there and looks valid, process... */ | |
9c70220b | 538 | rarp = (struct arphdr *)skb_transport_header(skb); |
1da177e4 LT |
539 | rarp_ptr = (unsigned char *) (rarp + 1); |
540 | ||
541 | /* One reply at a time, please. */ | |
542 | spin_lock(&ic_recv_lock); | |
543 | ||
544 | /* If we already have a reply, just drop the packet */ | |
545 | if (ic_got_reply) | |
546 | goto drop_unlock; | |
547 | ||
548 | /* Find the ic_device that the packet arrived on */ | |
549 | d = ic_first_dev; | |
550 | while (d && d->dev != dev) | |
551 | d = d->next; | |
552 | if (!d) | |
553 | goto drop_unlock; /* should never happen */ | |
554 | ||
555 | /* Extract variable-width fields */ | |
1da177e4 LT |
556 | rarp_ptr += dev->addr_len; |
557 | memcpy(&sip, rarp_ptr, 4); | |
558 | rarp_ptr += 4; | |
559 | tha = rarp_ptr; | |
560 | rarp_ptr += dev->addr_len; | |
561 | memcpy(&tip, rarp_ptr, 4); | |
562 | ||
563 | /* Discard packets which are not meant for us. */ | |
564 | if (memcmp(tha, dev->dev_addr, dev->addr_len)) | |
565 | goto drop_unlock; | |
566 | ||
567 | /* Discard packets which are not from specified server. */ | |
5a874db4 | 568 | if (ic_servaddr != NONE && ic_servaddr != sip) |
1da177e4 LT |
569 | goto drop_unlock; |
570 | ||
571 | /* We have a winner! */ | |
2647cffb | 572 | ic_dev = d; |
5a874db4 | 573 | if (ic_myaddr == NONE) |
1da177e4 LT |
574 | ic_myaddr = tip; |
575 | ic_servaddr = sip; | |
9dd4a13a | 576 | ic_addrservaddr = sip; |
1da177e4 LT |
577 | ic_got_reply = IC_RARP; |
578 | ||
579 | drop_unlock: | |
580 | /* Show's over. Nothing to see here. */ | |
581 | spin_unlock(&ic_recv_lock); | |
582 | ||
583 | drop: | |
584 | /* Throw the packet out. */ | |
585 | kfree_skb(skb); | |
586 | return 0; | |
587 | } | |
588 | ||
589 | ||
590 | /* | |
591 | * Send RARP request packet over a single interface. | |
592 | */ | |
593 | static void __init ic_rarp_send_if(struct ic_device *d) | |
594 | { | |
595 | struct net_device *dev = d->dev; | |
596 | arp_send(ARPOP_RREQUEST, ETH_P_RARP, 0, dev, 0, NULL, | |
597 | dev->dev_addr, dev->dev_addr); | |
598 | } | |
599 | #endif | |
600 | ||
842b08bb AS |
601 | /* |
602 | * Predefine Nameservers | |
603 | */ | |
604 | static inline void __init ic_nameservers_predef(void) | |
605 | { | |
606 | int i; | |
607 | ||
608 | for (i = 0; i < CONF_NAMESERVERS_MAX; i++) | |
609 | ic_nameservers[i] = NONE; | |
610 | } | |
611 | ||
1da177e4 LT |
612 | /* |
613 | * DHCP/BOOTP support. | |
614 | */ | |
615 | ||
616 | #ifdef IPCONFIG_BOOTP | |
617 | ||
618 | struct bootp_pkt { /* BOOTP packet format */ | |
619 | struct iphdr iph; /* IP header */ | |
620 | struct udphdr udph; /* UDP header */ | |
621 | u8 op; /* 1=request, 2=reply */ | |
622 | u8 htype; /* HW address type */ | |
623 | u8 hlen; /* HW address length */ | |
624 | u8 hops; /* Used only by gateways */ | |
5a874db4 AV |
625 | __be32 xid; /* Transaction ID */ |
626 | __be16 secs; /* Seconds since we started */ | |
627 | __be16 flags; /* Just what it says */ | |
628 | __be32 client_ip; /* Client's IP address if known */ | |
629 | __be32 your_ip; /* Assigned IP address */ | |
630 | __be32 server_ip; /* (Next, e.g. NFS) Server's IP address */ | |
631 | __be32 relay_ip; /* IP address of BOOTP relay */ | |
1da177e4 LT |
632 | u8 hw_addr[16]; /* Client's HW address */ |
633 | u8 serv_name[64]; /* Server host name */ | |
634 | u8 boot_file[128]; /* Name of boot file */ | |
635 | u8 exten[312]; /* DHCP options / BOOTP vendor extensions */ | |
636 | }; | |
637 | ||
638 | /* packet ops */ | |
639 | #define BOOTP_REQUEST 1 | |
640 | #define BOOTP_REPLY 2 | |
641 | ||
642 | /* DHCP message types */ | |
643 | #define DHCPDISCOVER 1 | |
644 | #define DHCPOFFER 2 | |
645 | #define DHCPREQUEST 3 | |
646 | #define DHCPDECLINE 4 | |
647 | #define DHCPACK 5 | |
648 | #define DHCPNAK 6 | |
649 | #define DHCPRELEASE 7 | |
650 | #define DHCPINFORM 8 | |
651 | ||
f2ccd8fa | 652 | static int ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev); |
1da177e4 LT |
653 | |
654 | static struct packet_type bootp_packet_type __initdata = { | |
09640e63 | 655 | .type = cpu_to_be16(ETH_P_IP), |
1da177e4 LT |
656 | .func = ic_bootp_recv, |
657 | }; | |
658 | ||
1da177e4 LT |
659 | /* |
660 | * Initialize DHCP/BOOTP extension fields in the request. | |
661 | */ | |
662 | ||
663 | static const u8 ic_bootp_cookie[4] = { 99, 130, 83, 99 }; | |
664 | ||
665 | #ifdef IPCONFIG_DHCP | |
666 | ||
667 | static void __init | |
22fc5388 | 668 | ic_dhcp_init_options(u8 *options, struct ic_device *d) |
1da177e4 | 669 | { |
5a874db4 | 670 | u8 mt = ((ic_servaddr == NONE) |
1da177e4 LT |
671 | ? DHCPDISCOVER : DHCPREQUEST); |
672 | u8 *e = options; | |
62013dbb | 673 | int len; |
1da177e4 | 674 | |
22fc5388 | 675 | pr_debug("DHCP: Sending message type %d (%s)\n", mt, d->dev->name); |
1da177e4 LT |
676 | |
677 | memcpy(e, ic_bootp_cookie, 4); /* RFC1048 Magic Cookie */ | |
678 | e += 4; | |
679 | ||
680 | *e++ = 53; /* DHCP message type */ | |
681 | *e++ = 1; | |
682 | *e++ = mt; | |
683 | ||
684 | if (mt == DHCPREQUEST) { | |
685 | *e++ = 54; /* Server ID (IP address) */ | |
686 | *e++ = 4; | |
687 | memcpy(e, &ic_servaddr, 4); | |
688 | e += 4; | |
689 | ||
690 | *e++ = 50; /* Requested IP address */ | |
691 | *e++ = 4; | |
692 | memcpy(e, &ic_myaddr, 4); | |
693 | e += 4; | |
694 | } | |
695 | ||
696 | /* always? */ | |
697 | { | |
698 | static const u8 ic_req_params[] = { | |
699 | 1, /* Subnet mask */ | |
700 | 3, /* Default gateway */ | |
701 | 6, /* DNS server */ | |
702 | 12, /* Host name */ | |
703 | 15, /* Domain name */ | |
704 | 17, /* Boot path */ | |
9643f455 | 705 | 26, /* MTU */ |
1da177e4 LT |
706 | 40, /* NIS domain name */ |
707 | }; | |
708 | ||
709 | *e++ = 55; /* Parameter request list */ | |
710 | *e++ = sizeof(ic_req_params); | |
711 | memcpy(e, ic_req_params, sizeof(ic_req_params)); | |
712 | e += sizeof(ic_req_params); | |
62013dbb | 713 | |
130c0f47 WF |
714 | if (ic_host_name_set) { |
715 | *e++ = 12; /* host-name */ | |
716 | len = strlen(utsname()->nodename); | |
717 | *e++ = len; | |
718 | memcpy(e, utsname()->nodename, len); | |
719 | e += len; | |
720 | } | |
62013dbb | 721 | if (*vendor_class_identifier) { |
058bd4d2 JP |
722 | pr_info("DHCP: sending class identifier \"%s\"\n", |
723 | vendor_class_identifier); | |
62013dbb RJ |
724 | *e++ = 60; /* Class-identifier */ |
725 | len = strlen(vendor_class_identifier); | |
726 | *e++ = len; | |
727 | memcpy(e, vendor_class_identifier, len); | |
728 | e += len; | |
729 | } | |
26fb342c LR |
730 | len = strlen(dhcp_client_identifier + 1); |
731 | /* the minimum length of identifier is 2, include 1 byte type, | |
732 | * and can not be larger than the length of options | |
733 | */ | |
734 | if (len >= 1 && len < 312 - (e - options) - 1) { | |
735 | *e++ = 61; | |
736 | *e++ = len + 1; | |
737 | memcpy(e, dhcp_client_identifier, len + 1); | |
738 | e += len + 1; | |
739 | } | |
1da177e4 LT |
740 | } |
741 | ||
742 | *e++ = 255; /* End of the list */ | |
743 | } | |
744 | ||
745 | #endif /* IPCONFIG_DHCP */ | |
746 | ||
747 | static void __init ic_bootp_init_ext(u8 *e) | |
748 | { | |
749 | memcpy(e, ic_bootp_cookie, 4); /* RFC1048 Magic Cookie */ | |
750 | e += 4; | |
751 | *e++ = 1; /* Subnet mask request */ | |
752 | *e++ = 4; | |
753 | e += 4; | |
754 | *e++ = 3; /* Default gateway request */ | |
755 | *e++ = 4; | |
756 | e += 4; | |
757 | *e++ = 5; /* Name server request */ | |
758 | *e++ = 8; | |
759 | e += 8; | |
760 | *e++ = 12; /* Host name request */ | |
761 | *e++ = 32; | |
762 | e += 32; | |
763 | *e++ = 40; /* NIS Domain name request */ | |
764 | *e++ = 32; | |
765 | e += 32; | |
766 | *e++ = 17; /* Boot path */ | |
767 | *e++ = 40; | |
768 | e += 40; | |
769 | ||
e905a9ed | 770 | *e++ = 57; /* set extension buffer size for reply */ |
1da177e4 | 771 | *e++ = 2; |
e905a9ed | 772 | *e++ = 1; /* 128+236+8+20+14, see dhcpd sources */ |
1da177e4 LT |
773 | *e++ = 150; |
774 | ||
775 | *e++ = 255; /* End of the list */ | |
776 | } | |
777 | ||
778 | ||
5e953778 CF |
779 | /* |
780 | * Initialize the DHCP/BOOTP mechanism. | |
781 | */ | |
782 | static inline void __init ic_bootp_init(void) | |
783 | { | |
784 | ic_nameservers_predef(); | |
1da177e4 LT |
785 | |
786 | dev_add_pack(&bootp_packet_type); | |
787 | } | |
788 | ||
789 | ||
790 | /* | |
791 | * DHCP/BOOTP cleanup. | |
792 | */ | |
45e741b8 | 793 | static inline void __init ic_bootp_cleanup(void) |
1da177e4 LT |
794 | { |
795 | dev_remove_pack(&bootp_packet_type); | |
796 | } | |
797 | ||
798 | ||
799 | /* | |
800 | * Send DHCP/BOOTP request to single interface. | |
801 | */ | |
802 | static void __init ic_bootp_send_if(struct ic_device *d, unsigned long jiffies_diff) | |
803 | { | |
804 | struct net_device *dev = d->dev; | |
805 | struct sk_buff *skb; | |
806 | struct bootp_pkt *b; | |
1da177e4 | 807 | struct iphdr *h; |
66088243 HX |
808 | int hlen = LL_RESERVED_SPACE(dev); |
809 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
810 | |
811 | /* Allocate packet */ | |
66088243 | 812 | skb = alloc_skb(sizeof(struct bootp_pkt) + hlen + tlen + 15, |
f5184d26 | 813 | GFP_KERNEL); |
1da177e4 LT |
814 | if (!skb) |
815 | return; | |
66088243 | 816 | skb_reserve(skb, hlen); |
b080db58 | 817 | b = skb_put_zero(skb, sizeof(struct bootp_pkt)); |
1da177e4 LT |
818 | |
819 | /* Construct IP header */ | |
04b964db | 820 | skb_reset_network_header(skb); |
eddc9ec5 | 821 | h = ip_hdr(skb); |
1da177e4 LT |
822 | h->version = 4; |
823 | h->ihl = 5; | |
824 | h->tot_len = htons(sizeof(struct bootp_pkt)); | |
825 | h->frag_off = htons(IP_DF); | |
826 | h->ttl = 64; | |
827 | h->protocol = IPPROTO_UDP; | |
5a874db4 | 828 | h->daddr = htonl(INADDR_BROADCAST); |
1da177e4 LT |
829 | h->check = ip_fast_csum((unsigned char *) h, h->ihl); |
830 | ||
831 | /* Construct UDP header */ | |
832 | b->udph.source = htons(68); | |
833 | b->udph.dest = htons(67); | |
834 | b->udph.len = htons(sizeof(struct bootp_pkt) - sizeof(struct iphdr)); | |
835 | /* UDP checksum not calculated -- explicitly allowed in BOOTP RFC */ | |
836 | ||
837 | /* Construct DHCP/BOOTP header */ | |
838 | b->op = BOOTP_REQUEST; | |
839 | if (dev->type < 256) /* check for false types */ | |
840 | b->htype = dev->type; | |
1da177e4 LT |
841 | else if (dev->type == ARPHRD_FDDI) |
842 | b->htype = ARPHRD_ETHER; | |
843 | else { | |
09605cc1 BS |
844 | pr_warn("Unknown ARP type 0x%04x for device %s\n", dev->type, |
845 | dev->name); | |
1da177e4 LT |
846 | b->htype = dev->type; /* can cause undefined behavior */ |
847 | } | |
dea75bdf SH |
848 | |
849 | /* server_ip and your_ip address are both already zero per RFC2131 */ | |
1da177e4 | 850 | b->hlen = dev->addr_len; |
1da177e4 LT |
851 | memcpy(b->hw_addr, dev->dev_addr, dev->addr_len); |
852 | b->secs = htons(jiffies_diff / HZ); | |
853 | b->xid = d->xid; | |
854 | ||
855 | /* add DHCP options or BOOTP extensions */ | |
856 | #ifdef IPCONFIG_DHCP | |
857 | if (ic_proto_enabled & IC_USE_DHCP) | |
22fc5388 | 858 | ic_dhcp_init_options(b->exten, d); |
1da177e4 LT |
859 | else |
860 | #endif | |
861 | ic_bootp_init_ext(b->exten); | |
862 | ||
863 | /* Chain packet down the line... */ | |
864 | skb->dev = dev; | |
865 | skb->protocol = htons(ETH_P_IP); | |
0c4e8581 | 866 | if (dev_hard_header(skb, dev, ntohs(skb->protocol), |
ad79eefc RL |
867 | dev->broadcast, dev->dev_addr, skb->len) < 0) { |
868 | kfree_skb(skb); | |
869 | printk("E"); | |
870 | return; | |
871 | } | |
872 | ||
873 | if (dev_queue_xmit(skb) < 0) | |
1da177e4 LT |
874 | printk("E"); |
875 | } | |
876 | ||
877 | ||
878 | /* | |
879 | * Copy BOOTP-supplied string if not already set. | |
880 | */ | |
881 | static int __init ic_bootp_string(char *dest, char *src, int len, int max) | |
882 | { | |
883 | if (!len) | |
884 | return 0; | |
885 | if (len > max-1) | |
886 | len = max-1; | |
887 | memcpy(dest, src, len); | |
888 | dest[len] = '\0'; | |
889 | return 1; | |
890 | } | |
891 | ||
892 | ||
893 | /* | |
894 | * Process BOOTP extensions. | |
895 | */ | |
896 | static void __init ic_do_bootp_ext(u8 *ext) | |
897 | { | |
747465ef ED |
898 | u8 servers; |
899 | int i; | |
900 | __be16 mtu; | |
1da177e4 | 901 | |
1da177e4 LT |
902 | u8 *c; |
903 | ||
09605cc1 | 904 | pr_debug("DHCP/BOOTP: Got extension %d:", *ext); |
132adf54 | 905 | for (c=ext+2; c<ext+2+ext[1]; c++) |
09605cc1 BS |
906 | pr_debug(" %02x", *c); |
907 | pr_debug("\n"); | |
1da177e4 LT |
908 | |
909 | switch (*ext++) { | |
1d67a516 JP |
910 | case 1: /* Subnet mask */ |
911 | if (ic_netmask == NONE) | |
912 | memcpy(&ic_netmask, ext+1, 4); | |
913 | break; | |
914 | case 3: /* Default gateway */ | |
915 | if (ic_gateway == NONE) | |
916 | memcpy(&ic_gateway, ext+1, 4); | |
917 | break; | |
918 | case 6: /* DNS server */ | |
919 | servers= *ext/4; | |
920 | if (servers > CONF_NAMESERVERS_MAX) | |
921 | servers = CONF_NAMESERVERS_MAX; | |
922 | for (i = 0; i < servers; i++) { | |
923 | if (ic_nameservers[i] == NONE) | |
924 | memcpy(&ic_nameservers[i], ext+1+4*i, 4); | |
925 | } | |
926 | break; | |
927 | case 12: /* Host name */ | |
928 | ic_bootp_string(utsname()->nodename, ext+1, *ext, | |
929 | __NEW_UTS_LEN); | |
930 | ic_host_name_set = 1; | |
931 | break; | |
932 | case 15: /* Domain name (DNS) */ | |
933 | ic_bootp_string(ic_domain, ext+1, *ext, sizeof(ic_domain)); | |
934 | break; | |
935 | case 17: /* Root path */ | |
936 | if (!root_server_path[0]) | |
937 | ic_bootp_string(root_server_path, ext+1, *ext, | |
938 | sizeof(root_server_path)); | |
939 | break; | |
940 | case 26: /* Interface MTU */ | |
941 | memcpy(&mtu, ext+1, sizeof(mtu)); | |
942 | ic_dev_mtu = ntohs(mtu); | |
943 | break; | |
944 | case 40: /* NIS Domain name (_not_ DNS) */ | |
945 | ic_bootp_string(utsname()->domainname, ext+1, *ext, | |
946 | __NEW_UTS_LEN); | |
947 | break; | |
1da177e4 LT |
948 | } |
949 | } | |
950 | ||
951 | ||
952 | /* | |
953 | * Receive BOOTP reply. | |
954 | */ | |
f2ccd8fa | 955 | static int __init ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) |
1da177e4 LT |
956 | { |
957 | struct bootp_pkt *b; | |
958 | struct iphdr *h; | |
959 | struct ic_device *d; | |
960 | int len, ext_len; | |
961 | ||
721499e8 | 962 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
963 | goto drop; |
964 | ||
1da177e4 LT |
965 | /* Perform verifications before taking the lock. */ |
966 | if (skb->pkt_type == PACKET_OTHERHOST) | |
967 | goto drop; | |
968 | ||
51456b29 IM |
969 | skb = skb_share_check(skb, GFP_ATOMIC); |
970 | if (!skb) | |
1da177e4 LT |
971 | return NET_RX_DROP; |
972 | ||
973 | if (!pskb_may_pull(skb, | |
974 | sizeof(struct iphdr) + | |
975 | sizeof(struct udphdr))) | |
976 | goto drop; | |
977 | ||
eddc9ec5 | 978 | b = (struct bootp_pkt *)skb_network_header(skb); |
1da177e4 LT |
979 | h = &b->iph; |
980 | ||
981 | if (h->ihl != 5 || h->version != 4 || h->protocol != IPPROTO_UDP) | |
982 | goto drop; | |
983 | ||
984 | /* Fragments are not supported */ | |
56f8a75c | 985 | if (ip_is_fragment(h)) { |
e87cc472 | 986 | net_err_ratelimited("DHCP/BOOTP: Ignoring fragmented reply\n"); |
1da177e4 LT |
987 | goto drop; |
988 | } | |
989 | ||
990 | if (skb->len < ntohs(h->tot_len)) | |
991 | goto drop; | |
992 | ||
993 | if (ip_fast_csum((char *) h, h->ihl)) | |
994 | goto drop; | |
995 | ||
996 | if (b->udph.source != htons(67) || b->udph.dest != htons(68)) | |
997 | goto drop; | |
998 | ||
999 | if (ntohs(h->tot_len) < ntohs(b->udph.len) + sizeof(struct iphdr)) | |
1000 | goto drop; | |
1001 | ||
1002 | len = ntohs(b->udph.len) - sizeof(struct udphdr); | |
1003 | ext_len = len - (sizeof(*b) - | |
1004 | sizeof(struct iphdr) - | |
1005 | sizeof(struct udphdr) - | |
1006 | sizeof(b->exten)); | |
1007 | if (ext_len < 0) | |
1008 | goto drop; | |
1009 | ||
1010 | /* Ok the front looks good, make sure we can get at the rest. */ | |
1011 | if (!pskb_may_pull(skb, skb->len)) | |
1012 | goto drop; | |
1013 | ||
eddc9ec5 | 1014 | b = (struct bootp_pkt *)skb_network_header(skb); |
1da177e4 LT |
1015 | h = &b->iph; |
1016 | ||
1017 | /* One reply at a time, please. */ | |
1018 | spin_lock(&ic_recv_lock); | |
1019 | ||
1020 | /* If we already have a reply, just drop the packet */ | |
1021 | if (ic_got_reply) | |
1022 | goto drop_unlock; | |
1023 | ||
1024 | /* Find the ic_device that the packet arrived on */ | |
1025 | d = ic_first_dev; | |
1026 | while (d && d->dev != dev) | |
1027 | d = d->next; | |
1028 | if (!d) | |
1029 | goto drop_unlock; /* should never happen */ | |
1030 | ||
1031 | /* Is it a reply to our BOOTP request? */ | |
1032 | if (b->op != BOOTP_REPLY || | |
1033 | b->xid != d->xid) { | |
22fc5388 UKK |
1034 | net_err_ratelimited("DHCP/BOOTP: Reply not for us on %s, op[%x] xid[%x]\n", |
1035 | d->dev->name, b->op, b->xid); | |
1da177e4 LT |
1036 | goto drop_unlock; |
1037 | } | |
1038 | ||
1039 | /* Parse extensions */ | |
1040 | if (ext_len >= 4 && | |
1041 | !memcmp(b->exten, ic_bootp_cookie, 4)) { /* Check magic cookie */ | |
e905a9ed | 1042 | u8 *end = (u8 *) b + ntohs(b->iph.tot_len); |
1da177e4 LT |
1043 | u8 *ext; |
1044 | ||
1045 | #ifdef IPCONFIG_DHCP | |
1046 | if (ic_proto_enabled & IC_USE_DHCP) { | |
5a874db4 | 1047 | __be32 server_id = NONE; |
1da177e4 LT |
1048 | int mt = 0; |
1049 | ||
1050 | ext = &b->exten[4]; | |
1051 | while (ext < end && *ext != 0xff) { | |
1052 | u8 *opt = ext++; | |
1053 | if (*opt == 0) /* Padding */ | |
1054 | continue; | |
1055 | ext += *ext + 1; | |
1056 | if (ext >= end) | |
1057 | break; | |
1058 | switch (*opt) { | |
1059 | case 53: /* Message type */ | |
1060 | if (opt[1]) | |
1061 | mt = opt[2]; | |
1062 | break; | |
1063 | case 54: /* Server ID (IP address) */ | |
1064 | if (opt[1] >= 4) | |
1065 | memcpy(&server_id, opt + 2, 4); | |
1066 | break; | |
3ff50b79 | 1067 | } |
1da177e4 LT |
1068 | } |
1069 | ||
22fc5388 | 1070 | pr_debug("DHCP: Got message type %d (%s)\n", mt, d->dev->name); |
1da177e4 LT |
1071 | |
1072 | switch (mt) { | |
1073 | case DHCPOFFER: | |
1074 | /* While in the process of accepting one offer, | |
1075 | * ignore all others. | |
1076 | */ | |
5a874db4 | 1077 | if (ic_myaddr != NONE) |
1da177e4 LT |
1078 | goto drop_unlock; |
1079 | ||
1080 | /* Let's accept that offer. */ | |
1081 | ic_myaddr = b->your_ip; | |
1082 | ic_servaddr = server_id; | |
09605cc1 BS |
1083 | pr_debug("DHCP: Offered address %pI4 by server %pI4\n", |
1084 | &ic_myaddr, &b->iph.saddr); | |
1da177e4 LT |
1085 | /* The DHCP indicated server address takes |
1086 | * precedence over the bootp header one if | |
1087 | * they are different. | |
1088 | */ | |
5a874db4 | 1089 | if ((server_id != NONE) && |
1da177e4 LT |
1090 | (b->server_ip != server_id)) |
1091 | b->server_ip = ic_servaddr; | |
1092 | break; | |
1093 | ||
1094 | case DHCPACK: | |
1095 | if (memcmp(dev->dev_addr, b->hw_addr, dev->addr_len) != 0) | |
1096 | goto drop_unlock; | |
1097 | ||
1098 | /* Yeah! */ | |
1099 | break; | |
1100 | ||
1101 | default: | |
1102 | /* Urque. Forget it*/ | |
5a874db4 AV |
1103 | ic_myaddr = NONE; |
1104 | ic_servaddr = NONE; | |
1da177e4 | 1105 | goto drop_unlock; |
3ff50b79 | 1106 | } |
1da177e4 LT |
1107 | |
1108 | ic_dhcp_msgtype = mt; | |
1109 | ||
1110 | } | |
1111 | #endif /* IPCONFIG_DHCP */ | |
1112 | ||
1113 | ext = &b->exten[4]; | |
1114 | while (ext < end && *ext != 0xff) { | |
1115 | u8 *opt = ext++; | |
1116 | if (*opt == 0) /* Padding */ | |
1117 | continue; | |
1118 | ext += *ext + 1; | |
1119 | if (ext < end) | |
1120 | ic_do_bootp_ext(opt); | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | /* We have a winner! */ | |
2647cffb | 1125 | ic_dev = d; |
1da177e4 LT |
1126 | ic_myaddr = b->your_ip; |
1127 | ic_servaddr = b->server_ip; | |
9dd4a13a | 1128 | ic_addrservaddr = b->iph.saddr; |
5a874db4 | 1129 | if (ic_gateway == NONE && b->relay_ip) |
1da177e4 | 1130 | ic_gateway = b->relay_ip; |
5a874db4 | 1131 | if (ic_nameservers[0] == NONE) |
1da177e4 LT |
1132 | ic_nameservers[0] = ic_servaddr; |
1133 | ic_got_reply = IC_BOOTP; | |
1134 | ||
1135 | drop_unlock: | |
1136 | /* Show's over. Nothing to see here. */ | |
1137 | spin_unlock(&ic_recv_lock); | |
1138 | ||
1139 | drop: | |
1140 | /* Throw the packet out. */ | |
1141 | kfree_skb(skb); | |
1142 | ||
1143 | return 0; | |
e905a9ed | 1144 | } |
1da177e4 LT |
1145 | |
1146 | ||
1147 | #endif | |
1148 | ||
1149 | ||
1150 | /* | |
1151 | * Dynamic IP configuration -- DHCP, BOOTP, RARP. | |
1152 | */ | |
1153 | ||
1154 | #ifdef IPCONFIG_DYNAMIC | |
1155 | ||
1156 | static int __init ic_dynamic(void) | |
1157 | { | |
1158 | int retries; | |
1159 | struct ic_device *d; | |
1160 | unsigned long start_jiffies, timeout, jiff; | |
1161 | int do_bootp = ic_proto_have_if & IC_BOOTP; | |
1162 | int do_rarp = ic_proto_have_if & IC_RARP; | |
1163 | ||
1164 | /* | |
1165 | * If none of DHCP/BOOTP/RARP was selected, return with an error. | |
1166 | * This routine gets only called when some pieces of information | |
1167 | * are missing, and without DHCP/BOOTP/RARP we are unable to get it. | |
1168 | */ | |
1169 | if (!ic_proto_enabled) { | |
058bd4d2 | 1170 | pr_err("IP-Config: Incomplete network configuration information\n"); |
1da177e4 LT |
1171 | return -1; |
1172 | } | |
1173 | ||
1174 | #ifdef IPCONFIG_BOOTP | |
1175 | if ((ic_proto_enabled ^ ic_proto_have_if) & IC_BOOTP) | |
058bd4d2 | 1176 | pr_err("DHCP/BOOTP: No suitable device found\n"); |
1da177e4 LT |
1177 | #endif |
1178 | #ifdef IPCONFIG_RARP | |
1179 | if ((ic_proto_enabled ^ ic_proto_have_if) & IC_RARP) | |
058bd4d2 | 1180 | pr_err("RARP: No suitable device found\n"); |
1da177e4 LT |
1181 | #endif |
1182 | ||
1183 | if (!ic_proto_have_if) | |
1184 | /* Error message already printed */ | |
1185 | return -1; | |
1186 | ||
1187 | /* | |
1188 | * Setup protocols | |
1189 | */ | |
1190 | #ifdef IPCONFIG_BOOTP | |
1191 | if (do_bootp) | |
1192 | ic_bootp_init(); | |
1193 | #endif | |
1194 | #ifdef IPCONFIG_RARP | |
1195 | if (do_rarp) | |
1196 | ic_rarp_init(); | |
1197 | #endif | |
1198 | ||
1199 | /* | |
1200 | * Send requests and wait, until we get an answer. This loop | |
1201 | * seems to be a terrible waste of CPU time, but actually there is | |
1202 | * only one process running at all, so we don't need to use any | |
1203 | * scheduler functions. | |
e905a9ed | 1204 | * [Actually we could now, but the nothing else running note still |
1da177e4 LT |
1205 | * applies.. - AC] |
1206 | */ | |
058bd4d2 JP |
1207 | pr_notice("Sending %s%s%s requests .", |
1208 | do_bootp | |
1209 | ? ((ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP") : "", | |
1210 | (do_bootp && do_rarp) ? " and " : "", | |
1211 | do_rarp ? "RARP" : ""); | |
1da177e4 LT |
1212 | |
1213 | start_jiffies = jiffies; | |
1214 | d = ic_first_dev; | |
1215 | retries = CONF_SEND_RETRIES; | |
1216 | get_random_bytes(&timeout, sizeof(timeout)); | |
95c96174 | 1217 | timeout = CONF_BASE_TIMEOUT + (timeout % (unsigned int) CONF_TIMEOUT_RANDOM); |
132adf54 | 1218 | for (;;) { |
405fd707 | 1219 | #ifdef IPCONFIG_BOOTP |
1da177e4 LT |
1220 | if (do_bootp && (d->able & IC_BOOTP)) |
1221 | ic_bootp_send_if(d, jiffies - start_jiffies); | |
1222 | #endif | |
1223 | #ifdef IPCONFIG_RARP | |
1224 | if (do_rarp && (d->able & IC_RARP)) | |
1225 | ic_rarp_send_if(d); | |
1226 | #endif | |
1227 | ||
e0688534 UKK |
1228 | if (!d->next) { |
1229 | jiff = jiffies + timeout; | |
1230 | while (time_before(jiffies, jiff) && !ic_got_reply) | |
1231 | schedule_timeout_uninterruptible(1); | |
1232 | } | |
1da177e4 LT |
1233 | #ifdef IPCONFIG_DHCP |
1234 | /* DHCP isn't done until we get a DHCPACK. */ | |
9d4fb27d JP |
1235 | if ((ic_got_reply & IC_BOOTP) && |
1236 | (ic_proto_enabled & IC_USE_DHCP) && | |
1237 | ic_dhcp_msgtype != DHCPACK) { | |
1da177e4 | 1238 | ic_got_reply = 0; |
2647cffb UKK |
1239 | /* continue on device that got the reply */ |
1240 | d = ic_dev; | |
6c1c36b0 | 1241 | pr_cont(","); |
1da177e4 LT |
1242 | continue; |
1243 | } | |
1244 | #endif /* IPCONFIG_DHCP */ | |
1245 | ||
1246 | if (ic_got_reply) { | |
6c1c36b0 | 1247 | pr_cont(" OK\n"); |
1da177e4 LT |
1248 | break; |
1249 | } | |
1250 | ||
1251 | if ((d = d->next)) | |
1252 | continue; | |
1253 | ||
1254 | if (! --retries) { | |
6c1c36b0 | 1255 | pr_cont(" timed out!\n"); |
1da177e4 LT |
1256 | break; |
1257 | } | |
1258 | ||
1259 | d = ic_first_dev; | |
1260 | ||
1261 | timeout = timeout CONF_TIMEOUT_MULT; | |
1262 | if (timeout > CONF_TIMEOUT_MAX) | |
1263 | timeout = CONF_TIMEOUT_MAX; | |
1264 | ||
6c1c36b0 | 1265 | pr_cont("."); |
1da177e4 LT |
1266 | } |
1267 | ||
1268 | #ifdef IPCONFIG_BOOTP | |
1269 | if (do_bootp) | |
1270 | ic_bootp_cleanup(); | |
1271 | #endif | |
1272 | #ifdef IPCONFIG_RARP | |
1273 | if (do_rarp) | |
1274 | ic_rarp_cleanup(); | |
1275 | #endif | |
1276 | ||
7a1af5d7 | 1277 | if (!ic_got_reply) { |
5a874db4 | 1278 | ic_myaddr = NONE; |
1da177e4 | 1279 | return -1; |
7a1af5d7 | 1280 | } |
1da177e4 | 1281 | |
6c1c36b0 | 1282 | pr_info("IP-Config: Got %s answer from %pI4, my address is %pI4\n", |
e905a9ed | 1283 | ((ic_got_reply & IC_RARP) ? "RARP" |
09605cc1 | 1284 | : (ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP"), |
6c1c36b0 | 1285 | &ic_addrservaddr, &ic_myaddr); |
1da177e4 LT |
1286 | |
1287 | return 0; | |
1288 | } | |
1289 | ||
1290 | #endif /* IPCONFIG_DYNAMIC */ | |
1291 | ||
1292 | #ifdef CONFIG_PROC_FS | |
1293 | ||
1294 | static int pnp_seq_show(struct seq_file *seq, void *v) | |
1295 | { | |
1296 | int i; | |
1297 | ||
1298 | if (ic_proto_used & IC_PROTO) | |
1299 | seq_printf(seq, "#PROTO: %s\n", | |
1300 | (ic_proto_used & IC_RARP) ? "RARP" | |
1301 | : (ic_proto_used & IC_USE_DHCP) ? "DHCP" : "BOOTP"); | |
1302 | else | |
1303 | seq_puts(seq, "#MANUAL\n"); | |
1304 | ||
1305 | if (ic_domain[0]) | |
1306 | seq_printf(seq, | |
1307 | "domain %s\n", ic_domain); | |
1308 | for (i = 0; i < CONF_NAMESERVERS_MAX; i++) { | |
5a874db4 | 1309 | if (ic_nameservers[i] != NONE) |
673d57e7 HH |
1310 | seq_printf(seq, "nameserver %pI4\n", |
1311 | &ic_nameservers[i]); | |
1da177e4 | 1312 | } |
5a874db4 | 1313 | if (ic_servaddr != NONE) |
673d57e7 HH |
1314 | seq_printf(seq, "bootserver %pI4\n", |
1315 | &ic_servaddr); | |
1da177e4 LT |
1316 | return 0; |
1317 | } | |
1318 | ||
1319 | static int pnp_seq_open(struct inode *indoe, struct file *file) | |
1320 | { | |
1321 | return single_open(file, pnp_seq_show, NULL); | |
1322 | } | |
1323 | ||
9a32144e | 1324 | static const struct file_operations pnp_seq_fops = { |
1da177e4 LT |
1325 | .owner = THIS_MODULE, |
1326 | .open = pnp_seq_open, | |
1327 | .read = seq_read, | |
1328 | .llseek = seq_lseek, | |
1329 | .release = single_release, | |
1330 | }; | |
1331 | #endif /* CONFIG_PROC_FS */ | |
1332 | ||
1333 | /* | |
1334 | * Extract IP address from the parameter string if needed. Note that we | |
1335 | * need to have root_server_addr set _before_ IPConfig gets called as it | |
1336 | * can override it. | |
1337 | */ | |
5a874db4 | 1338 | __be32 __init root_nfs_parse_addr(char *name) |
1da177e4 | 1339 | { |
5a874db4 | 1340 | __be32 addr; |
1da177e4 LT |
1341 | int octets = 0; |
1342 | char *cp, *cq; | |
1343 | ||
1344 | cp = cq = name; | |
1345 | while (octets < 4) { | |
1346 | while (*cp >= '0' && *cp <= '9') | |
1347 | cp++; | |
1348 | if (cp == cq || cp - cq > 3) | |
1349 | break; | |
1350 | if (*cp == '.' || octets == 3) | |
1351 | octets++; | |
1352 | if (octets < 4) | |
1353 | cp++; | |
1354 | cq = cp; | |
1355 | } | |
1356 | if (octets == 4 && (*cp == ':' || *cp == '\0')) { | |
1357 | if (*cp == ':') | |
1358 | *cp++ = '\0'; | |
1359 | addr = in_aton(name); | |
1360 | memmove(name, cp, strlen(cp) + 1); | |
1361 | } else | |
5a874db4 | 1362 | addr = NONE; |
1da177e4 LT |
1363 | |
1364 | return addr; | |
1365 | } | |
1366 | ||
964ad81c DM |
1367 | #define DEVICE_WAIT_MAX 12 /* 12 seconds */ |
1368 | ||
1369 | static int __init wait_for_devices(void) | |
1370 | { | |
1371 | int i; | |
1372 | ||
964ad81c DM |
1373 | for (i = 0; i < DEVICE_WAIT_MAX; i++) { |
1374 | struct net_device *dev; | |
1375 | int found = 0; | |
1376 | ||
1377 | rtnl_lock(); | |
1378 | for_each_netdev(&init_net, dev) { | |
3fb72f1e | 1379 | if (ic_is_init_dev(dev)) { |
964ad81c DM |
1380 | found = 1; |
1381 | break; | |
1382 | } | |
1383 | } | |
1384 | rtnl_unlock(); | |
1385 | if (found) | |
1386 | return 0; | |
1387 | ssleep(1); | |
1388 | } | |
1389 | return -ENODEV; | |
1390 | } | |
1391 | ||
1da177e4 LT |
1392 | /* |
1393 | * IP Autoconfig dispatcher. | |
1394 | */ | |
1395 | ||
1396 | static int __init ip_auto_config(void) | |
1397 | { | |
5a874db4 | 1398 | __be32 addr; |
9d8dba6c BZ |
1399 | #ifdef IPCONFIG_DYNAMIC |
1400 | int retries = CONF_OPEN_RETRIES; | |
1401 | #endif | |
964ad81c | 1402 | int err; |
5e953778 | 1403 | unsigned int i; |
1da177e4 LT |
1404 | |
1405 | #ifdef CONFIG_PROC_FS | |
d4beaa66 | 1406 | proc_create("pnp", S_IRUGO, init_net.proc_net, &pnp_seq_fops); |
1da177e4 LT |
1407 | #endif /* CONFIG_PROC_FS */ |
1408 | ||
1409 | if (!ic_enable) | |
1410 | return 0; | |
1411 | ||
09605cc1 | 1412 | pr_debug("IP-Config: Entered.\n"); |
1da177e4 LT |
1413 | #ifdef IPCONFIG_DYNAMIC |
1414 | try_try_again: | |
1415 | #endif | |
964ad81c DM |
1416 | /* Wait for devices to appear */ |
1417 | err = wait_for_devices(); | |
1418 | if (err) | |
1419 | return err; | |
1da177e4 LT |
1420 | |
1421 | /* Setup all network devices */ | |
964ad81c DM |
1422 | err = ic_open_devs(); |
1423 | if (err) | |
1424 | return err; | |
1da177e4 LT |
1425 | |
1426 | /* Give drivers a chance to settle */ | |
3fb72f1e | 1427 | msleep(CONF_POST_OPEN); |
1da177e4 LT |
1428 | |
1429 | /* | |
1430 | * If the config information is insufficient (e.g., our IP address or | |
1431 | * IP address of the boot server is missing or we have multiple network | |
1432 | * interfaces and no default was set), use BOOTP or RARP to get the | |
1433 | * missing values. | |
1434 | */ | |
5a874db4 | 1435 | if (ic_myaddr == NONE || |
1da177e4 | 1436 | #ifdef CONFIG_ROOT_NFS |
9d4fb27d JP |
1437 | (root_server_addr == NONE && |
1438 | ic_servaddr == NONE && | |
1439 | ROOT_DEV == Root_NFS) || | |
1da177e4 LT |
1440 | #endif |
1441 | ic_first_dev->next) { | |
1442 | #ifdef IPCONFIG_DYNAMIC | |
1da177e4 LT |
1443 | if (ic_dynamic() < 0) { |
1444 | ic_close_devs(); | |
1445 | ||
1446 | /* | |
1447 | * I don't know why, but sometimes the | |
1448 | * eepro100 driver (at least) gets upset and | |
1449 | * doesn't work the first time it's opened. | |
1450 | * But then if you close it and reopen it, it | |
1451 | * works just fine. So we need to try that at | |
1452 | * least once before giving up. | |
1453 | * | |
1454 | * Also, if the root will be NFS-mounted, we | |
1455 | * have nowhere to go if DHCP fails. So we | |
1456 | * just have to keep trying forever. | |
1457 | * | |
1458 | * -- Chip | |
1459 | */ | |
1460 | #ifdef CONFIG_ROOT_NFS | |
1461 | if (ROOT_DEV == Root_NFS) { | |
058bd4d2 | 1462 | pr_err("IP-Config: Retrying forever (NFS root)...\n"); |
1da177e4 LT |
1463 | goto try_try_again; |
1464 | } | |
1465 | #endif | |
1466 | ||
1467 | if (--retries) { | |
058bd4d2 | 1468 | pr_err("IP-Config: Reopening network devices...\n"); |
1da177e4 LT |
1469 | goto try_try_again; |
1470 | } | |
1471 | ||
1472 | /* Oh, well. At least we tried. */ | |
058bd4d2 | 1473 | pr_err("IP-Config: Auto-configuration of network failed\n"); |
1da177e4 LT |
1474 | return -1; |
1475 | } | |
1476 | #else /* !DYNAMIC */ | |
058bd4d2 | 1477 | pr_err("IP-Config: Incomplete network configuration information\n"); |
1da177e4 LT |
1478 | ic_close_devs(); |
1479 | return -1; | |
1480 | #endif /* IPCONFIG_DYNAMIC */ | |
1481 | } else { | |
1482 | /* Device selected manually or only one device -> use it */ | |
2647cffb | 1483 | ic_dev = ic_first_dev; |
1da177e4 LT |
1484 | } |
1485 | ||
1486 | addr = root_nfs_parse_addr(root_server_path); | |
5a874db4 | 1487 | if (root_server_addr == NONE) |
1da177e4 LT |
1488 | root_server_addr = addr; |
1489 | ||
1490 | /* | |
25985edc | 1491 | * Use defaults wherever applicable. |
1da177e4 LT |
1492 | */ |
1493 | if (ic_defaults() < 0) | |
1494 | return -1; | |
1495 | ||
1da177e4 LT |
1496 | /* |
1497 | * Record which protocol was actually used. | |
1498 | */ | |
1499 | #ifdef IPCONFIG_DYNAMIC | |
1500 | ic_proto_used = ic_got_reply | (ic_proto_enabled & IC_USE_DHCP); | |
1501 | #endif | |
1502 | ||
1503 | #ifndef IPCONFIG_SILENT | |
1504 | /* | |
1505 | * Clue in the operator. | |
1506 | */ | |
058bd4d2 | 1507 | pr_info("IP-Config: Complete:\n"); |
9ecd1c3d CF |
1508 | |
1509 | pr_info(" device=%s, hwaddr=%*phC, ipaddr=%pI4, mask=%pI4, gw=%pI4\n", | |
2647cffb | 1510 | ic_dev->dev->name, ic_dev->dev->addr_len, ic_dev->dev->dev_addr, |
9ecd1c3d | 1511 | &ic_myaddr, &ic_netmask, &ic_gateway); |
058bd4d2 JP |
1512 | pr_info(" host=%s, domain=%s, nis-domain=%s\n", |
1513 | utsname()->nodename, ic_domain, utsname()->domainname); | |
1514 | pr_info(" bootserver=%pI4, rootserver=%pI4, rootpath=%s", | |
1515 | &ic_servaddr, &root_server_addr, root_server_path); | |
9643f455 | 1516 | if (ic_dev_mtu) |
058bd4d2 | 1517 | pr_cont(", mtu=%d", ic_dev_mtu); |
5e953778 CF |
1518 | for (i = 0; i < CONF_NAMESERVERS_MAX; i++) |
1519 | if (ic_nameservers[i] != NONE) { | |
6c1c36b0 | 1520 | pr_cont(" nameserver%u=%pI4", |
5e953778 CF |
1521 | i, &ic_nameservers[i]); |
1522 | break; | |
1523 | } | |
1524 | for (i++; i < CONF_NAMESERVERS_MAX; i++) | |
1525 | if (ic_nameservers[i] != NONE) | |
6c1c36b0 GU |
1526 | pr_cont(", nameserver%u=%pI4", i, &ic_nameservers[i]); |
1527 | pr_cont("\n"); | |
1da177e4 LT |
1528 | #endif /* !SILENT */ |
1529 | ||
9c706a49 UKK |
1530 | /* |
1531 | * Close all network devices except the device we've | |
1532 | * autoconfigured and set up routes. | |
1533 | */ | |
9c706a49 | 1534 | if (ic_setup_if() < 0 || ic_setup_routes() < 0) |
d2d371ae TR |
1535 | err = -1; |
1536 | else | |
1537 | err = 0; | |
9c706a49 | 1538 | |
d2d371ae | 1539 | ic_close_devs(); |
9c706a49 | 1540 | |
d2d371ae | 1541 | return err; |
1da177e4 LT |
1542 | } |
1543 | ||
1544 | late_initcall(ip_auto_config); | |
1545 | ||
1546 | ||
1547 | /* | |
1548 | * Decode any IP configuration options in the "ip=" or "nfsaddrs=" kernel | |
dc7a0816 | 1549 | * command line parameter. See Documentation/filesystems/nfs/nfsroot.txt. |
1da177e4 LT |
1550 | */ |
1551 | static int __init ic_proto_name(char *name) | |
1552 | { | |
1553 | if (!strcmp(name, "on") || !strcmp(name, "any")) { | |
1554 | return 1; | |
1555 | } | |
a6c05c3d | 1556 | if (!strcmp(name, "off") || !strcmp(name, "none")) { |
92ffb85d | 1557 | return 0; |
a6c05c3d | 1558 | } |
1da177e4 | 1559 | #ifdef CONFIG_IP_PNP_DHCP |
26fb342c LR |
1560 | else if (!strncmp(name, "dhcp", 4)) { |
1561 | char *client_id; | |
1562 | ||
1da177e4 | 1563 | ic_proto_enabled &= ~IC_RARP; |
26fb342c LR |
1564 | client_id = strstr(name, "dhcp,"); |
1565 | if (client_id) { | |
1566 | char *v; | |
1567 | ||
1568 | client_id = client_id + 5; | |
1569 | v = strchr(client_id, ','); | |
1570 | if (!v) | |
1571 | return 1; | |
1572 | *v = 0; | |
1573 | if (kstrtou8(client_id, 0, dhcp_client_identifier)) | |
09605cc1 | 1574 | pr_debug("DHCP: Invalid client identifier type\n"); |
26fb342c LR |
1575 | strncpy(dhcp_client_identifier + 1, v + 1, 251); |
1576 | *v = ','; | |
1577 | } | |
1da177e4 LT |
1578 | return 1; |
1579 | } | |
1580 | #endif | |
1581 | #ifdef CONFIG_IP_PNP_BOOTP | |
1582 | else if (!strcmp(name, "bootp")) { | |
1583 | ic_proto_enabled &= ~(IC_RARP | IC_USE_DHCP); | |
1584 | return 1; | |
1585 | } | |
1586 | #endif | |
1587 | #ifdef CONFIG_IP_PNP_RARP | |
1588 | else if (!strcmp(name, "rarp")) { | |
1589 | ic_proto_enabled &= ~(IC_BOOTP | IC_USE_DHCP); | |
1590 | return 1; | |
1591 | } | |
1592 | #endif | |
1593 | #ifdef IPCONFIG_DYNAMIC | |
1594 | else if (!strcmp(name, "both")) { | |
1595 | ic_proto_enabled &= ~IC_USE_DHCP; /* backward compat :-( */ | |
1596 | return 1; | |
1597 | } | |
1598 | #endif | |
1599 | return 0; | |
1600 | } | |
1601 | ||
1602 | static int __init ip_auto_config_setup(char *addrs) | |
1603 | { | |
1604 | char *cp, *ip, *dp; | |
1605 | int num = 0; | |
1606 | ||
1607 | ic_set_manually = 1; | |
9cecd07c | 1608 | ic_enable = 1; |
1da177e4 | 1609 | |
92ffb85d AW |
1610 | /* |
1611 | * If any dhcp, bootp etc options are set, leave autoconfig on | |
1612 | * and skip the below static IP processing. | |
1613 | */ | |
1da177e4 LT |
1614 | if (ic_proto_name(addrs)) |
1615 | return 1; | |
1616 | ||
92ffb85d AW |
1617 | /* If no static IP is given, turn off autoconfig and bail. */ |
1618 | if (*addrs == 0 || | |
1619 | strcmp(addrs, "off") == 0 || | |
1620 | strcmp(addrs, "none") == 0) { | |
1621 | ic_enable = 0; | |
1622 | return 1; | |
1623 | } | |
1624 | ||
5e953778 CF |
1625 | ic_nameservers_predef(); |
1626 | ||
92ffb85d | 1627 | /* Parse string for static IP assignment. */ |
1da177e4 LT |
1628 | ip = addrs; |
1629 | while (ip && *ip) { | |
1630 | if ((cp = strchr(ip, ':'))) | |
1631 | *cp++ = '\0'; | |
1632 | if (strlen(ip) > 0) { | |
09605cc1 | 1633 | pr_debug("IP-Config: Parameter #%d: `%s'\n", num, ip); |
1da177e4 LT |
1634 | switch (num) { |
1635 | case 0: | |
e6f1cebf | 1636 | if ((ic_myaddr = in_aton(ip)) == ANY) |
5a874db4 | 1637 | ic_myaddr = NONE; |
1da177e4 LT |
1638 | break; |
1639 | case 1: | |
e6f1cebf | 1640 | if ((ic_servaddr = in_aton(ip)) == ANY) |
5a874db4 | 1641 | ic_servaddr = NONE; |
1da177e4 LT |
1642 | break; |
1643 | case 2: | |
e6f1cebf | 1644 | if ((ic_gateway = in_aton(ip)) == ANY) |
5a874db4 | 1645 | ic_gateway = NONE; |
1da177e4 LT |
1646 | break; |
1647 | case 3: | |
e6f1cebf | 1648 | if ((ic_netmask = in_aton(ip)) == ANY) |
5a874db4 | 1649 | ic_netmask = NONE; |
1da177e4 LT |
1650 | break; |
1651 | case 4: | |
1652 | if ((dp = strchr(ip, '.'))) { | |
1653 | *dp++ = '\0'; | |
e9ff3990 SH |
1654 | strlcpy(utsname()->domainname, dp, |
1655 | sizeof(utsname()->domainname)); | |
1da177e4 | 1656 | } |
e9ff3990 SH |
1657 | strlcpy(utsname()->nodename, ip, |
1658 | sizeof(utsname()->nodename)); | |
1da177e4 LT |
1659 | ic_host_name_set = 1; |
1660 | break; | |
1661 | case 5: | |
1662 | strlcpy(user_dev_name, ip, sizeof(user_dev_name)); | |
1663 | break; | |
1664 | case 6: | |
92ffb85d AW |
1665 | if (ic_proto_name(ip) == 0 && |
1666 | ic_myaddr == NONE) { | |
1667 | ic_enable = 0; | |
1668 | } | |
1da177e4 | 1669 | break; |
5e953778 CF |
1670 | case 7: |
1671 | if (CONF_NAMESERVERS_MAX >= 1) { | |
1672 | ic_nameservers[0] = in_aton(ip); | |
1673 | if (ic_nameservers[0] == ANY) | |
1674 | ic_nameservers[0] = NONE; | |
1675 | } | |
1676 | break; | |
1677 | case 8: | |
1678 | if (CONF_NAMESERVERS_MAX >= 2) { | |
1679 | ic_nameservers[1] = in_aton(ip); | |
1680 | if (ic_nameservers[1] == ANY) | |
1681 | ic_nameservers[1] = NONE; | |
1682 | } | |
1683 | break; | |
1da177e4 LT |
1684 | } |
1685 | } | |
1686 | ip = cp; | |
1687 | num++; | |
1688 | } | |
1689 | ||
1690 | return 1; | |
1691 | } | |
b37f4d7b | 1692 | __setup("ip=", ip_auto_config_setup); |
1da177e4 LT |
1693 | |
1694 | static int __init nfsaddrs_config_setup(char *addrs) | |
1695 | { | |
1696 | return ip_auto_config_setup(addrs); | |
1697 | } | |
b37f4d7b | 1698 | __setup("nfsaddrs=", nfsaddrs_config_setup); |
1da177e4 | 1699 | |
62013dbb RJ |
1700 | static int __init vendor_class_identifier_setup(char *addrs) |
1701 | { | |
1702 | if (strlcpy(vendor_class_identifier, addrs, | |
1703 | sizeof(vendor_class_identifier)) | |
1704 | >= sizeof(vendor_class_identifier)) | |
09605cc1 | 1705 | pr_warn("DHCP: vendorclass too long, truncated to \"%s\"\n", |
058bd4d2 | 1706 | vendor_class_identifier); |
62013dbb RJ |
1707 | return 1; |
1708 | } | |
62013dbb | 1709 | __setup("dhcpclass=", vendor_class_identifier_setup); |