Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Automatic Configuration of IP -- use DHCP, BOOTP, RARP, or |
3 | * user-supplied information to configure own IP address and routes. | |
4 | * | |
5 | * Copyright (C) 1996-1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz> | |
6 | * | |
7 | * Derived from network configuration code in fs/nfs/nfsroot.c, | |
8 | * originally Copyright (C) 1995, 1996 Gero Kuhlmann and me. | |
9 | * | |
10 | * BOOTP rewritten to construct and analyse packets itself instead | |
11 | * of misusing the IP layer. num_bugs_causing_wrong_arp_replies--; | |
12 | * -- MJ, December 1998 | |
e905a9ed | 13 | * |
1da177e4 LT |
14 | * Fixed ip_auto_config_setup calling at startup in the new "Linker Magic" |
15 | * initialization scheme. | |
16 | * - Arnaldo Carvalho de Melo <acme@conectiva.com.br>, 08/11/1999 | |
17 | * | |
18 | * DHCP support added. To users this looks like a whole separate | |
19 | * protocol, but we know it's just a bag on the side of BOOTP. | |
20 | * -- Chip Salzenberg <chip@valinux.com>, May 2000 | |
21 | * | |
22 | * Ported DHCP support from 2.2.16 to 2.4.0-test4 | |
23 | * -- Eric Biederman <ebiederman@lnxi.com>, 30 Aug 2000 | |
24 | * | |
25 | * Merged changes from 2.2.19 into 2.4.3 | |
26 | * -- Eric Biederman <ebiederman@lnxi.com>, 22 April Aug 2001 | |
27 | * | |
28 | * Multiple Nameservers in /proc/net/pnp | |
29 | * -- Josef Siemes <jsiemes@web.de>, Aug 2002 | |
30 | */ | |
31 | ||
1da177e4 LT |
32 | #include <linux/types.h> |
33 | #include <linux/string.h> | |
34 | #include <linux/kernel.h> | |
35 | #include <linux/jiffies.h> | |
36 | #include <linux/random.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/utsname.h> | |
39 | #include <linux/in.h> | |
40 | #include <linux/if.h> | |
41 | #include <linux/inet.h> | |
14c85021 | 42 | #include <linux/inetdevice.h> |
1da177e4 LT |
43 | #include <linux/netdevice.h> |
44 | #include <linux/if_arp.h> | |
45 | #include <linux/skbuff.h> | |
46 | #include <linux/ip.h> | |
47 | #include <linux/socket.h> | |
48 | #include <linux/route.h> | |
49 | #include <linux/udp.h> | |
50 | #include <linux/proc_fs.h> | |
51 | #include <linux/seq_file.h> | |
52 | #include <linux/major.h> | |
53 | #include <linux/root_dev.h> | |
54 | #include <linux/delay.h> | |
43d60661 | 55 | #include <linux/nfs_fs.h> |
5a0e3ad6 | 56 | #include <linux/slab.h> |
bc3b2d7f | 57 | #include <linux/export.h> |
457c4cbc | 58 | #include <net/net_namespace.h> |
1da177e4 LT |
59 | #include <net/arp.h> |
60 | #include <net/ip.h> | |
61 | #include <net/ipconfig.h> | |
14c85021 | 62 | #include <net/route.h> |
1da177e4 LT |
63 | |
64 | #include <asm/uaccess.h> | |
65 | #include <net/checksum.h> | |
66 | #include <asm/processor.h> | |
67 | ||
68 | /* Define this to allow debugging output */ | |
69 | #undef IPCONFIG_DEBUG | |
70 | ||
71 | #ifdef IPCONFIG_DEBUG | |
72 | #define DBG(x) printk x | |
73 | #else | |
74 | #define DBG(x) do { } while(0) | |
75 | #endif | |
76 | ||
77 | #if defined(CONFIG_IP_PNP_DHCP) | |
78 | #define IPCONFIG_DHCP | |
79 | #endif | |
80 | #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_DHCP) | |
81 | #define IPCONFIG_BOOTP | |
82 | #endif | |
83 | #if defined(CONFIG_IP_PNP_RARP) | |
84 | #define IPCONFIG_RARP | |
85 | #endif | |
86 | #if defined(IPCONFIG_BOOTP) || defined(IPCONFIG_RARP) | |
87 | #define IPCONFIG_DYNAMIC | |
88 | #endif | |
89 | ||
90 | /* Define the friendly delay before and after opening net devices */ | |
3fb72f1e MN |
91 | #define CONF_POST_OPEN 10 /* After opening: 10 msecs */ |
92 | #define CONF_CARRIER_TIMEOUT 120000 /* Wait for carrier timeout */ | |
1da177e4 LT |
93 | |
94 | /* Define the timeout for waiting for a DHCP/BOOTP/RARP reply */ | |
95 | #define CONF_OPEN_RETRIES 2 /* (Re)open devices twice */ | |
96 | #define CONF_SEND_RETRIES 6 /* Send six requests per open */ | |
97 | #define CONF_INTER_TIMEOUT (HZ/2) /* Inter-device timeout: 1/2 second */ | |
98 | #define CONF_BASE_TIMEOUT (HZ*2) /* Initial timeout: 2 seconds */ | |
99 | #define CONF_TIMEOUT_RANDOM (HZ) /* Maximum amount of randomization */ | |
100 | #define CONF_TIMEOUT_MULT *7/4 /* Rate of timeout growth */ | |
101 | #define CONF_TIMEOUT_MAX (HZ*30) /* Maximum allowed timeout */ | |
e905a9ed YH |
102 | #define CONF_NAMESERVERS_MAX 3 /* Maximum number of nameservers |
103 | - '3' from resolv.h */ | |
1da177e4 | 104 | |
09640e63 HH |
105 | #define NONE cpu_to_be32(INADDR_NONE) |
106 | #define ANY cpu_to_be32(INADDR_ANY) | |
1da177e4 LT |
107 | |
108 | /* | |
109 | * Public IP configuration | |
110 | */ | |
111 | ||
112 | /* This is used by platforms which might be able to set the ipconfig | |
113 | * variables using firmware environment vars. If this is set, it will | |
114 | * ignore such firmware variables. | |
115 | */ | |
116 | int ic_set_manually __initdata = 0; /* IPconfig parameters set manually */ | |
117 | ||
118 | static int ic_enable __initdata = 0; /* IP config enabled? */ | |
119 | ||
120 | /* Protocol choice */ | |
121 | int ic_proto_enabled __initdata = 0 | |
122 | #ifdef IPCONFIG_BOOTP | |
123 | | IC_BOOTP | |
124 | #endif | |
125 | #ifdef CONFIG_IP_PNP_DHCP | |
126 | | IC_USE_DHCP | |
127 | #endif | |
128 | #ifdef IPCONFIG_RARP | |
129 | | IC_RARP | |
130 | #endif | |
131 | ; | |
132 | ||
133 | static int ic_host_name_set __initdata = 0; /* Host name set by us? */ | |
134 | ||
5a874db4 AV |
135 | __be32 ic_myaddr = NONE; /* My IP address */ |
136 | static __be32 ic_netmask = NONE; /* Netmask for local subnet */ | |
137 | __be32 ic_gateway = NONE; /* Gateway IP address */ | |
1da177e4 | 138 | |
9dd4a13a PDM |
139 | __be32 ic_addrservaddr = NONE; /* IP Address of the IP addresses'server */ |
140 | ||
5a874db4 | 141 | __be32 ic_servaddr = NONE; /* Boot server IP address */ |
1da177e4 | 142 | |
5a874db4 | 143 | __be32 root_server_addr = NONE; /* Address of NFS server */ |
1da177e4 LT |
144 | u8 root_server_path[256] = { 0, }; /* Path to mount as root */ |
145 | ||
747465ef | 146 | __be32 ic_dev_xid; /* Device under configuration */ |
2513dfb8 | 147 | |
1b0b04f9 DM |
148 | /* vendor class identifier */ |
149 | static char vendor_class_identifier[253] __initdata; | |
62013dbb | 150 | |
1da177e4 LT |
151 | /* Persistent data: */ |
152 | ||
153 | static int ic_proto_used; /* Protocol used, if any */ | |
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 */ | |
165 | static int ic_proto_have_if __initdata = 0; | |
166 | ||
9643f455 CF |
167 | /* MTU for boot device */ |
168 | static int ic_dev_mtu __initdata = 0; | |
169 | ||
1da177e4 LT |
170 | #ifdef IPCONFIG_DYNAMIC |
171 | static DEFINE_SPINLOCK(ic_recv_lock); | |
172 | static volatile int ic_got_reply __initdata = 0; /* Proto(s) that replied */ | |
173 | #endif | |
174 | #ifdef IPCONFIG_DHCP | |
175 | static int ic_dhcp_msgtype __initdata = 0; /* DHCP msg type received */ | |
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 | ||
191 | static struct ic_device *ic_first_dev __initdata = NULL;/* List of open device */ | |
192 | static struct net_device *ic_dev __initdata = NULL; /* Selected device */ | |
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; | |
3fb72f1e | 209 | unsigned long start; |
1da177e4 LT |
210 | |
211 | last = &ic_first_dev; | |
6756ae4b | 212 | rtnl_lock(); |
1da177e4 LT |
213 | |
214 | /* bring loopback device up first */ | |
0cc217e1 EB |
215 | for_each_netdev(&init_net, dev) { |
216 | if (!(dev->flags & IFF_LOOPBACK)) | |
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 | |
058bd4d2 JP |
228 | pr_warn("DHCP/BOOTP: Ignoring device %s, MTU %d too small", |
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; | |
255 | DBG(("IP-Config: %s UP (able=%d, xid=%08x)\n", | |
256 | dev->name, able, d->xid)); | |
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; | |
266 | while (jiffies - start < msecs_to_jiffies(CONF_CARRIER_TIMEOUT)) { | |
267 | for_each_netdev(&init_net, dev) | |
268 | if (ic_is_init_dev(dev) && netif_carrier_ok(dev)) | |
269 | goto have_carrier; | |
270 | ||
271 | msleep(1); | |
272 | } | |
273 | have_carrier: | |
6756ae4b | 274 | rtnl_unlock(); |
1da177e4 LT |
275 | |
276 | *last = NULL; | |
277 | ||
278 | if (!ic_first_dev) { | |
279 | if (user_dev_name[0]) | |
058bd4d2 JP |
280 | pr_err("IP-Config: Device `%s' not found\n", |
281 | user_dev_name); | |
1da177e4 | 282 | else |
058bd4d2 | 283 | pr_err("IP-Config: No network devices available\n"); |
964ad81c | 284 | return -ENODEV; |
1da177e4 LT |
285 | } |
286 | return 0; | |
287 | } | |
288 | ||
289 | static void __init ic_close_devs(void) | |
290 | { | |
291 | struct ic_device *d, *next; | |
292 | struct net_device *dev; | |
293 | ||
6756ae4b | 294 | rtnl_lock(); |
1da177e4 LT |
295 | next = ic_first_dev; |
296 | while ((d = next)) { | |
297 | next = d->next; | |
298 | dev = d->dev; | |
299 | if (dev != ic_dev) { | |
300 | DBG(("IP-Config: Downing %s\n", dev->name)); | |
301 | dev_change_flags(dev, d->flags); | |
302 | } | |
303 | kfree(d); | |
304 | } | |
6756ae4b | 305 | rtnl_unlock(); |
1da177e4 LT |
306 | } |
307 | ||
308 | /* | |
309 | * Interface to various network functions. | |
310 | */ | |
311 | ||
312 | static inline void | |
5a874db4 | 313 | set_sockaddr(struct sockaddr_in *sin, __be32 addr, __be16 port) |
1da177e4 LT |
314 | { |
315 | sin->sin_family = AF_INET; | |
316 | sin->sin_addr.s_addr = addr; | |
317 | sin->sin_port = port; | |
318 | } | |
319 | ||
9643f455 | 320 | static int __init ic_devinet_ioctl(unsigned int cmd, struct ifreq *arg) |
1da177e4 LT |
321 | { |
322 | int res; | |
323 | ||
324 | mm_segment_t oldfs = get_fs(); | |
325 | set_fs(get_ds()); | |
e5b13cb1 | 326 | res = devinet_ioctl(&init_net, cmd, (struct ifreq __user *) arg); |
1da177e4 LT |
327 | set_fs(oldfs); |
328 | return res; | |
329 | } | |
330 | ||
9643f455 CF |
331 | static int __init ic_dev_ioctl(unsigned int cmd, struct ifreq *arg) |
332 | { | |
333 | int res; | |
334 | ||
335 | mm_segment_t oldfs = get_fs(); | |
336 | set_fs(get_ds()); | |
337 | res = dev_ioctl(&init_net, cmd, (struct ifreq __user *) arg); | |
338 | set_fs(oldfs); | |
339 | return res; | |
340 | } | |
341 | ||
1da177e4 LT |
342 | static int __init ic_route_ioctl(unsigned int cmd, struct rtentry *arg) |
343 | { | |
344 | int res; | |
345 | ||
346 | mm_segment_t oldfs = get_fs(); | |
347 | set_fs(get_ds()); | |
1bad118a | 348 | res = ip_rt_ioctl(&init_net, cmd, (void __user *) arg); |
1da177e4 LT |
349 | set_fs(oldfs); |
350 | return res; | |
351 | } | |
352 | ||
353 | /* | |
354 | * Set up interface addresses and routes. | |
355 | */ | |
356 | ||
357 | static int __init ic_setup_if(void) | |
358 | { | |
359 | struct ifreq ir; | |
360 | struct sockaddr_in *sin = (void *) &ir.ifr_ifru.ifru_addr; | |
361 | int err; | |
362 | ||
363 | memset(&ir, 0, sizeof(ir)); | |
364 | strcpy(ir.ifr_ifrn.ifrn_name, ic_dev->name); | |
365 | set_sockaddr(sin, ic_myaddr, 0); | |
9643f455 | 366 | if ((err = ic_devinet_ioctl(SIOCSIFADDR, &ir)) < 0) { |
058bd4d2 JP |
367 | pr_err("IP-Config: Unable to set interface address (%d)\n", |
368 | err); | |
1da177e4 LT |
369 | return -1; |
370 | } | |
371 | set_sockaddr(sin, ic_netmask, 0); | |
9643f455 | 372 | if ((err = ic_devinet_ioctl(SIOCSIFNETMASK, &ir)) < 0) { |
058bd4d2 JP |
373 | pr_err("IP-Config: Unable to set interface netmask (%d)\n", |
374 | err); | |
1da177e4 LT |
375 | return -1; |
376 | } | |
377 | set_sockaddr(sin, ic_myaddr | ~ic_netmask, 0); | |
9643f455 | 378 | if ((err = ic_devinet_ioctl(SIOCSIFBRDADDR, &ir)) < 0) { |
058bd4d2 JP |
379 | pr_err("IP-Config: Unable to set interface broadcast address (%d)\n", |
380 | err); | |
1da177e4 LT |
381 | return -1; |
382 | } | |
9643f455 CF |
383 | /* Handle the case where we need non-standard MTU on the boot link (a network |
384 | * using jumbo frames, for instance). If we can't set the mtu, don't error | |
385 | * out, we'll try to muddle along. | |
386 | */ | |
387 | if (ic_dev_mtu != 0) { | |
388 | strcpy(ir.ifr_name, ic_dev->name); | |
389 | ir.ifr_mtu = ic_dev_mtu; | |
390 | if ((err = ic_dev_ioctl(SIOCSIFMTU, &ir)) < 0) | |
058bd4d2 JP |
391 | pr_err("IP-Config: Unable to set interface mtu to %d (%d)\n", |
392 | ic_dev_mtu, err); | |
9643f455 | 393 | } |
1da177e4 LT |
394 | return 0; |
395 | } | |
396 | ||
397 | static int __init ic_setup_routes(void) | |
398 | { | |
399 | /* No need to setup device routes, only the default route... */ | |
400 | ||
5a874db4 | 401 | if (ic_gateway != NONE) { |
1da177e4 LT |
402 | struct rtentry rm; |
403 | int err; | |
404 | ||
405 | memset(&rm, 0, sizeof(rm)); | |
406 | if ((ic_gateway ^ ic_myaddr) & ic_netmask) { | |
058bd4d2 | 407 | pr_err("IP-Config: Gateway not on directly connected network\n"); |
1da177e4 LT |
408 | return -1; |
409 | } | |
410 | set_sockaddr((struct sockaddr_in *) &rm.rt_dst, 0, 0); | |
411 | set_sockaddr((struct sockaddr_in *) &rm.rt_genmask, 0, 0); | |
412 | set_sockaddr((struct sockaddr_in *) &rm.rt_gateway, ic_gateway, 0); | |
413 | rm.rt_flags = RTF_UP | RTF_GATEWAY; | |
414 | if ((err = ic_route_ioctl(SIOCADDRT, &rm)) < 0) { | |
058bd4d2 JP |
415 | pr_err("IP-Config: Cannot add default route (%d)\n", |
416 | err); | |
1da177e4 LT |
417 | return -1; |
418 | } | |
419 | } | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
424 | /* | |
425 | * Fill in default values for all missing parameters. | |
426 | */ | |
427 | ||
428 | static int __init ic_defaults(void) | |
429 | { | |
430 | /* | |
431 | * At this point we have no userspace running so need not | |
432 | * claim locks on system_utsname | |
433 | */ | |
e905a9ed | 434 | |
1da177e4 | 435 | if (!ic_host_name_set) |
673d57e7 | 436 | sprintf(init_utsname()->nodename, "%pI4", &ic_myaddr); |
1da177e4 | 437 | |
5a874db4 | 438 | if (root_server_addr == NONE) |
1da177e4 LT |
439 | root_server_addr = ic_servaddr; |
440 | ||
5a874db4 | 441 | if (ic_netmask == NONE) { |
1da177e4 LT |
442 | if (IN_CLASSA(ntohl(ic_myaddr))) |
443 | ic_netmask = htonl(IN_CLASSA_NET); | |
444 | else if (IN_CLASSB(ntohl(ic_myaddr))) | |
445 | ic_netmask = htonl(IN_CLASSB_NET); | |
446 | else if (IN_CLASSC(ntohl(ic_myaddr))) | |
447 | ic_netmask = htonl(IN_CLASSC_NET); | |
448 | else { | |
058bd4d2 JP |
449 | pr_err("IP-Config: Unable to guess netmask for address %pI4\n", |
450 | &ic_myaddr); | |
1da177e4 LT |
451 | return -1; |
452 | } | |
673d57e7 | 453 | printk("IP-Config: Guessing netmask %pI4\n", &ic_netmask); |
1da177e4 LT |
454 | } |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
459 | /* | |
460 | * RARP support. | |
461 | */ | |
462 | ||
463 | #ifdef IPCONFIG_RARP | |
464 | ||
f2ccd8fa | 465 | static int ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev); |
1da177e4 LT |
466 | |
467 | static struct packet_type rarp_packet_type __initdata = { | |
09640e63 | 468 | .type = cpu_to_be16(ETH_P_RARP), |
1da177e4 LT |
469 | .func = ic_rarp_recv, |
470 | }; | |
471 | ||
45e741b8 | 472 | static inline void __init ic_rarp_init(void) |
1da177e4 LT |
473 | { |
474 | dev_add_pack(&rarp_packet_type); | |
475 | } | |
476 | ||
45e741b8 | 477 | static inline void __init ic_rarp_cleanup(void) |
1da177e4 LT |
478 | { |
479 | dev_remove_pack(&rarp_packet_type); | |
480 | } | |
481 | ||
482 | /* | |
483 | * Process received RARP packet. | |
484 | */ | |
485 | static int __init | |
f2ccd8fa | 486 | ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) |
1da177e4 LT |
487 | { |
488 | struct arphdr *rarp; | |
489 | unsigned char *rarp_ptr; | |
5a874db4 | 490 | __be32 sip, tip; |
1da177e4 LT |
491 | unsigned char *sha, *tha; /* s for "source", t for "target" */ |
492 | struct ic_device *d; | |
493 | ||
721499e8 | 494 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
495 | goto drop; |
496 | ||
1da177e4 LT |
497 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) |
498 | return NET_RX_DROP; | |
499 | ||
500 | if (!pskb_may_pull(skb, sizeof(struct arphdr))) | |
501 | goto drop; | |
502 | ||
503 | /* Basic sanity checks can be done without the lock. */ | |
9c70220b | 504 | rarp = (struct arphdr *)skb_transport_header(skb); |
1da177e4 LT |
505 | |
506 | /* If this test doesn't pass, it's not IP, or we should | |
507 | * ignore it anyway. | |
508 | */ | |
509 | if (rarp->ar_hln != dev->addr_len || dev->type != ntohs(rarp->ar_hrd)) | |
510 | goto drop; | |
511 | ||
512 | /* If it's not a RARP reply, delete it. */ | |
513 | if (rarp->ar_op != htons(ARPOP_RREPLY)) | |
514 | goto drop; | |
515 | ||
516 | /* If it's not Ethernet, delete it. */ | |
517 | if (rarp->ar_pro != htons(ETH_P_IP)) | |
518 | goto drop; | |
519 | ||
988b7050 | 520 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) |
1da177e4 LT |
521 | goto drop; |
522 | ||
523 | /* OK, it is all there and looks valid, process... */ | |
9c70220b | 524 | rarp = (struct arphdr *)skb_transport_header(skb); |
1da177e4 LT |
525 | rarp_ptr = (unsigned char *) (rarp + 1); |
526 | ||
527 | /* One reply at a time, please. */ | |
528 | spin_lock(&ic_recv_lock); | |
529 | ||
530 | /* If we already have a reply, just drop the packet */ | |
531 | if (ic_got_reply) | |
532 | goto drop_unlock; | |
533 | ||
534 | /* Find the ic_device that the packet arrived on */ | |
535 | d = ic_first_dev; | |
536 | while (d && d->dev != dev) | |
537 | d = d->next; | |
538 | if (!d) | |
539 | goto drop_unlock; /* should never happen */ | |
540 | ||
541 | /* Extract variable-width fields */ | |
542 | sha = rarp_ptr; | |
543 | rarp_ptr += dev->addr_len; | |
544 | memcpy(&sip, rarp_ptr, 4); | |
545 | rarp_ptr += 4; | |
546 | tha = rarp_ptr; | |
547 | rarp_ptr += dev->addr_len; | |
548 | memcpy(&tip, rarp_ptr, 4); | |
549 | ||
550 | /* Discard packets which are not meant for us. */ | |
551 | if (memcmp(tha, dev->dev_addr, dev->addr_len)) | |
552 | goto drop_unlock; | |
553 | ||
554 | /* Discard packets which are not from specified server. */ | |
5a874db4 | 555 | if (ic_servaddr != NONE && ic_servaddr != sip) |
1da177e4 LT |
556 | goto drop_unlock; |
557 | ||
558 | /* We have a winner! */ | |
559 | ic_dev = dev; | |
5a874db4 | 560 | if (ic_myaddr == NONE) |
1da177e4 LT |
561 | ic_myaddr = tip; |
562 | ic_servaddr = sip; | |
9dd4a13a | 563 | ic_addrservaddr = sip; |
1da177e4 LT |
564 | ic_got_reply = IC_RARP; |
565 | ||
566 | drop_unlock: | |
567 | /* Show's over. Nothing to see here. */ | |
568 | spin_unlock(&ic_recv_lock); | |
569 | ||
570 | drop: | |
571 | /* Throw the packet out. */ | |
572 | kfree_skb(skb); | |
573 | return 0; | |
574 | } | |
575 | ||
576 | ||
577 | /* | |
578 | * Send RARP request packet over a single interface. | |
579 | */ | |
580 | static void __init ic_rarp_send_if(struct ic_device *d) | |
581 | { | |
582 | struct net_device *dev = d->dev; | |
583 | arp_send(ARPOP_RREQUEST, ETH_P_RARP, 0, dev, 0, NULL, | |
584 | dev->dev_addr, dev->dev_addr); | |
585 | } | |
586 | #endif | |
587 | ||
842b08bb AS |
588 | /* |
589 | * Predefine Nameservers | |
590 | */ | |
591 | static inline void __init ic_nameservers_predef(void) | |
592 | { | |
593 | int i; | |
594 | ||
595 | for (i = 0; i < CONF_NAMESERVERS_MAX; i++) | |
596 | ic_nameservers[i] = NONE; | |
597 | } | |
598 | ||
1da177e4 LT |
599 | /* |
600 | * DHCP/BOOTP support. | |
601 | */ | |
602 | ||
603 | #ifdef IPCONFIG_BOOTP | |
604 | ||
605 | struct bootp_pkt { /* BOOTP packet format */ | |
606 | struct iphdr iph; /* IP header */ | |
607 | struct udphdr udph; /* UDP header */ | |
608 | u8 op; /* 1=request, 2=reply */ | |
609 | u8 htype; /* HW address type */ | |
610 | u8 hlen; /* HW address length */ | |
611 | u8 hops; /* Used only by gateways */ | |
5a874db4 AV |
612 | __be32 xid; /* Transaction ID */ |
613 | __be16 secs; /* Seconds since we started */ | |
614 | __be16 flags; /* Just what it says */ | |
615 | __be32 client_ip; /* Client's IP address if known */ | |
616 | __be32 your_ip; /* Assigned IP address */ | |
617 | __be32 server_ip; /* (Next, e.g. NFS) Server's IP address */ | |
618 | __be32 relay_ip; /* IP address of BOOTP relay */ | |
1da177e4 LT |
619 | u8 hw_addr[16]; /* Client's HW address */ |
620 | u8 serv_name[64]; /* Server host name */ | |
621 | u8 boot_file[128]; /* Name of boot file */ | |
622 | u8 exten[312]; /* DHCP options / BOOTP vendor extensions */ | |
623 | }; | |
624 | ||
625 | /* packet ops */ | |
626 | #define BOOTP_REQUEST 1 | |
627 | #define BOOTP_REPLY 2 | |
628 | ||
629 | /* DHCP message types */ | |
630 | #define DHCPDISCOVER 1 | |
631 | #define DHCPOFFER 2 | |
632 | #define DHCPREQUEST 3 | |
633 | #define DHCPDECLINE 4 | |
634 | #define DHCPACK 5 | |
635 | #define DHCPNAK 6 | |
636 | #define DHCPRELEASE 7 | |
637 | #define DHCPINFORM 8 | |
638 | ||
f2ccd8fa | 639 | static int ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev); |
1da177e4 LT |
640 | |
641 | static struct packet_type bootp_packet_type __initdata = { | |
09640e63 | 642 | .type = cpu_to_be16(ETH_P_IP), |
1da177e4 LT |
643 | .func = ic_bootp_recv, |
644 | }; | |
645 | ||
646 | ||
647 | /* | |
648 | * Initialize DHCP/BOOTP extension fields in the request. | |
649 | */ | |
650 | ||
651 | static const u8 ic_bootp_cookie[4] = { 99, 130, 83, 99 }; | |
652 | ||
653 | #ifdef IPCONFIG_DHCP | |
654 | ||
655 | static void __init | |
656 | ic_dhcp_init_options(u8 *options) | |
657 | { | |
5a874db4 | 658 | u8 mt = ((ic_servaddr == NONE) |
1da177e4 LT |
659 | ? DHCPDISCOVER : DHCPREQUEST); |
660 | u8 *e = options; | |
62013dbb | 661 | int len; |
1da177e4 LT |
662 | |
663 | #ifdef IPCONFIG_DEBUG | |
664 | printk("DHCP: Sending message type %d\n", mt); | |
665 | #endif | |
666 | ||
667 | memcpy(e, ic_bootp_cookie, 4); /* RFC1048 Magic Cookie */ | |
668 | e += 4; | |
669 | ||
670 | *e++ = 53; /* DHCP message type */ | |
671 | *e++ = 1; | |
672 | *e++ = mt; | |
673 | ||
674 | if (mt == DHCPREQUEST) { | |
675 | *e++ = 54; /* Server ID (IP address) */ | |
676 | *e++ = 4; | |
677 | memcpy(e, &ic_servaddr, 4); | |
678 | e += 4; | |
679 | ||
680 | *e++ = 50; /* Requested IP address */ | |
681 | *e++ = 4; | |
682 | memcpy(e, &ic_myaddr, 4); | |
683 | e += 4; | |
684 | } | |
685 | ||
686 | /* always? */ | |
687 | { | |
688 | static const u8 ic_req_params[] = { | |
689 | 1, /* Subnet mask */ | |
690 | 3, /* Default gateway */ | |
691 | 6, /* DNS server */ | |
692 | 12, /* Host name */ | |
693 | 15, /* Domain name */ | |
694 | 17, /* Boot path */ | |
9643f455 | 695 | 26, /* MTU */ |
1da177e4 LT |
696 | 40, /* NIS domain name */ |
697 | }; | |
698 | ||
699 | *e++ = 55; /* Parameter request list */ | |
700 | *e++ = sizeof(ic_req_params); | |
701 | memcpy(e, ic_req_params, sizeof(ic_req_params)); | |
702 | e += sizeof(ic_req_params); | |
62013dbb | 703 | |
130c0f47 WF |
704 | if (ic_host_name_set) { |
705 | *e++ = 12; /* host-name */ | |
706 | len = strlen(utsname()->nodename); | |
707 | *e++ = len; | |
708 | memcpy(e, utsname()->nodename, len); | |
709 | e += len; | |
710 | } | |
62013dbb | 711 | if (*vendor_class_identifier) { |
058bd4d2 JP |
712 | pr_info("DHCP: sending class identifier \"%s\"\n", |
713 | vendor_class_identifier); | |
62013dbb RJ |
714 | *e++ = 60; /* Class-identifier */ |
715 | len = strlen(vendor_class_identifier); | |
716 | *e++ = len; | |
717 | memcpy(e, vendor_class_identifier, len); | |
718 | e += len; | |
719 | } | |
1da177e4 LT |
720 | } |
721 | ||
722 | *e++ = 255; /* End of the list */ | |
723 | } | |
724 | ||
725 | #endif /* IPCONFIG_DHCP */ | |
726 | ||
727 | static void __init ic_bootp_init_ext(u8 *e) | |
728 | { | |
729 | memcpy(e, ic_bootp_cookie, 4); /* RFC1048 Magic Cookie */ | |
730 | e += 4; | |
731 | *e++ = 1; /* Subnet mask request */ | |
732 | *e++ = 4; | |
733 | e += 4; | |
734 | *e++ = 3; /* Default gateway request */ | |
735 | *e++ = 4; | |
736 | e += 4; | |
737 | *e++ = 5; /* Name server request */ | |
738 | *e++ = 8; | |
739 | e += 8; | |
740 | *e++ = 12; /* Host name request */ | |
741 | *e++ = 32; | |
742 | e += 32; | |
743 | *e++ = 40; /* NIS Domain name request */ | |
744 | *e++ = 32; | |
745 | e += 32; | |
746 | *e++ = 17; /* Boot path */ | |
747 | *e++ = 40; | |
748 | e += 40; | |
749 | ||
e905a9ed | 750 | *e++ = 57; /* set extension buffer size for reply */ |
1da177e4 | 751 | *e++ = 2; |
e905a9ed | 752 | *e++ = 1; /* 128+236+8+20+14, see dhcpd sources */ |
1da177e4 LT |
753 | *e++ = 150; |
754 | ||
755 | *e++ = 255; /* End of the list */ | |
756 | } | |
757 | ||
758 | ||
5e953778 CF |
759 | /* |
760 | * Initialize the DHCP/BOOTP mechanism. | |
761 | */ | |
762 | static inline void __init ic_bootp_init(void) | |
763 | { | |
764 | ic_nameservers_predef(); | |
1da177e4 LT |
765 | |
766 | dev_add_pack(&bootp_packet_type); | |
767 | } | |
768 | ||
769 | ||
770 | /* | |
771 | * DHCP/BOOTP cleanup. | |
772 | */ | |
45e741b8 | 773 | static inline void __init ic_bootp_cleanup(void) |
1da177e4 LT |
774 | { |
775 | dev_remove_pack(&bootp_packet_type); | |
776 | } | |
777 | ||
778 | ||
779 | /* | |
780 | * Send DHCP/BOOTP request to single interface. | |
781 | */ | |
782 | static void __init ic_bootp_send_if(struct ic_device *d, unsigned long jiffies_diff) | |
783 | { | |
784 | struct net_device *dev = d->dev; | |
785 | struct sk_buff *skb; | |
786 | struct bootp_pkt *b; | |
1da177e4 | 787 | struct iphdr *h; |
66088243 HX |
788 | int hlen = LL_RESERVED_SPACE(dev); |
789 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
790 | |
791 | /* Allocate packet */ | |
66088243 | 792 | skb = alloc_skb(sizeof(struct bootp_pkt) + hlen + tlen + 15, |
f5184d26 | 793 | GFP_KERNEL); |
1da177e4 LT |
794 | if (!skb) |
795 | return; | |
66088243 | 796 | skb_reserve(skb, hlen); |
1da177e4 LT |
797 | b = (struct bootp_pkt *) skb_put(skb, sizeof(struct bootp_pkt)); |
798 | memset(b, 0, sizeof(struct bootp_pkt)); | |
799 | ||
800 | /* Construct IP header */ | |
04b964db | 801 | skb_reset_network_header(skb); |
eddc9ec5 | 802 | h = ip_hdr(skb); |
1da177e4 LT |
803 | h->version = 4; |
804 | h->ihl = 5; | |
805 | h->tot_len = htons(sizeof(struct bootp_pkt)); | |
806 | h->frag_off = htons(IP_DF); | |
807 | h->ttl = 64; | |
808 | h->protocol = IPPROTO_UDP; | |
5a874db4 | 809 | h->daddr = htonl(INADDR_BROADCAST); |
1da177e4 LT |
810 | h->check = ip_fast_csum((unsigned char *) h, h->ihl); |
811 | ||
812 | /* Construct UDP header */ | |
813 | b->udph.source = htons(68); | |
814 | b->udph.dest = htons(67); | |
815 | b->udph.len = htons(sizeof(struct bootp_pkt) - sizeof(struct iphdr)); | |
816 | /* UDP checksum not calculated -- explicitly allowed in BOOTP RFC */ | |
817 | ||
818 | /* Construct DHCP/BOOTP header */ | |
819 | b->op = BOOTP_REQUEST; | |
820 | if (dev->type < 256) /* check for false types */ | |
821 | b->htype = dev->type; | |
1da177e4 LT |
822 | else if (dev->type == ARPHRD_FDDI) |
823 | b->htype = ARPHRD_ETHER; | |
824 | else { | |
825 | printk("Unknown ARP type 0x%04x for device %s\n", dev->type, dev->name); | |
826 | b->htype = dev->type; /* can cause undefined behavior */ | |
827 | } | |
dea75bdf SH |
828 | |
829 | /* server_ip and your_ip address are both already zero per RFC2131 */ | |
1da177e4 | 830 | b->hlen = dev->addr_len; |
1da177e4 LT |
831 | memcpy(b->hw_addr, dev->dev_addr, dev->addr_len); |
832 | b->secs = htons(jiffies_diff / HZ); | |
833 | b->xid = d->xid; | |
834 | ||
835 | /* add DHCP options or BOOTP extensions */ | |
836 | #ifdef IPCONFIG_DHCP | |
837 | if (ic_proto_enabled & IC_USE_DHCP) | |
838 | ic_dhcp_init_options(b->exten); | |
839 | else | |
840 | #endif | |
841 | ic_bootp_init_ext(b->exten); | |
842 | ||
843 | /* Chain packet down the line... */ | |
844 | skb->dev = dev; | |
845 | skb->protocol = htons(ETH_P_IP); | |
0c4e8581 | 846 | if (dev_hard_header(skb, dev, ntohs(skb->protocol), |
ad79eefc RL |
847 | dev->broadcast, dev->dev_addr, skb->len) < 0) { |
848 | kfree_skb(skb); | |
849 | printk("E"); | |
850 | return; | |
851 | } | |
852 | ||
853 | if (dev_queue_xmit(skb) < 0) | |
1da177e4 LT |
854 | printk("E"); |
855 | } | |
856 | ||
857 | ||
858 | /* | |
859 | * Copy BOOTP-supplied string if not already set. | |
860 | */ | |
861 | static int __init ic_bootp_string(char *dest, char *src, int len, int max) | |
862 | { | |
863 | if (!len) | |
864 | return 0; | |
865 | if (len > max-1) | |
866 | len = max-1; | |
867 | memcpy(dest, src, len); | |
868 | dest[len] = '\0'; | |
869 | return 1; | |
870 | } | |
871 | ||
872 | ||
873 | /* | |
874 | * Process BOOTP extensions. | |
875 | */ | |
876 | static void __init ic_do_bootp_ext(u8 *ext) | |
877 | { | |
747465ef ED |
878 | u8 servers; |
879 | int i; | |
880 | __be16 mtu; | |
1da177e4 LT |
881 | |
882 | #ifdef IPCONFIG_DEBUG | |
883 | u8 *c; | |
884 | ||
885 | printk("DHCP/BOOTP: Got extension %d:",*ext); | |
132adf54 | 886 | for (c=ext+2; c<ext+2+ext[1]; c++) |
1da177e4 LT |
887 | printk(" %02x", *c); |
888 | printk("\n"); | |
889 | #endif | |
890 | ||
891 | switch (*ext++) { | |
1d67a516 JP |
892 | case 1: /* Subnet mask */ |
893 | if (ic_netmask == NONE) | |
894 | memcpy(&ic_netmask, ext+1, 4); | |
895 | break; | |
896 | case 3: /* Default gateway */ | |
897 | if (ic_gateway == NONE) | |
898 | memcpy(&ic_gateway, ext+1, 4); | |
899 | break; | |
900 | case 6: /* DNS server */ | |
901 | servers= *ext/4; | |
902 | if (servers > CONF_NAMESERVERS_MAX) | |
903 | servers = CONF_NAMESERVERS_MAX; | |
904 | for (i = 0; i < servers; i++) { | |
905 | if (ic_nameservers[i] == NONE) | |
906 | memcpy(&ic_nameservers[i], ext+1+4*i, 4); | |
907 | } | |
908 | break; | |
909 | case 12: /* Host name */ | |
910 | ic_bootp_string(utsname()->nodename, ext+1, *ext, | |
911 | __NEW_UTS_LEN); | |
912 | ic_host_name_set = 1; | |
913 | break; | |
914 | case 15: /* Domain name (DNS) */ | |
915 | ic_bootp_string(ic_domain, ext+1, *ext, sizeof(ic_domain)); | |
916 | break; | |
917 | case 17: /* Root path */ | |
918 | if (!root_server_path[0]) | |
919 | ic_bootp_string(root_server_path, ext+1, *ext, | |
920 | sizeof(root_server_path)); | |
921 | break; | |
922 | case 26: /* Interface MTU */ | |
923 | memcpy(&mtu, ext+1, sizeof(mtu)); | |
924 | ic_dev_mtu = ntohs(mtu); | |
925 | break; | |
926 | case 40: /* NIS Domain name (_not_ DNS) */ | |
927 | ic_bootp_string(utsname()->domainname, ext+1, *ext, | |
928 | __NEW_UTS_LEN); | |
929 | break; | |
1da177e4 LT |
930 | } |
931 | } | |
932 | ||
933 | ||
934 | /* | |
935 | * Receive BOOTP reply. | |
936 | */ | |
f2ccd8fa | 937 | 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 |
938 | { |
939 | struct bootp_pkt *b; | |
940 | struct iphdr *h; | |
941 | struct ic_device *d; | |
942 | int len, ext_len; | |
943 | ||
721499e8 | 944 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
945 | goto drop; |
946 | ||
1da177e4 LT |
947 | /* Perform verifications before taking the lock. */ |
948 | if (skb->pkt_type == PACKET_OTHERHOST) | |
949 | goto drop; | |
950 | ||
951 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) | |
952 | return NET_RX_DROP; | |
953 | ||
954 | if (!pskb_may_pull(skb, | |
955 | sizeof(struct iphdr) + | |
956 | sizeof(struct udphdr))) | |
957 | goto drop; | |
958 | ||
eddc9ec5 | 959 | b = (struct bootp_pkt *)skb_network_header(skb); |
1da177e4 LT |
960 | h = &b->iph; |
961 | ||
962 | if (h->ihl != 5 || h->version != 4 || h->protocol != IPPROTO_UDP) | |
963 | goto drop; | |
964 | ||
965 | /* Fragments are not supported */ | |
56f8a75c | 966 | if (ip_is_fragment(h)) { |
e87cc472 | 967 | net_err_ratelimited("DHCP/BOOTP: Ignoring fragmented reply\n"); |
1da177e4 LT |
968 | goto drop; |
969 | } | |
970 | ||
971 | if (skb->len < ntohs(h->tot_len)) | |
972 | goto drop; | |
973 | ||
974 | if (ip_fast_csum((char *) h, h->ihl)) | |
975 | goto drop; | |
976 | ||
977 | if (b->udph.source != htons(67) || b->udph.dest != htons(68)) | |
978 | goto drop; | |
979 | ||
980 | if (ntohs(h->tot_len) < ntohs(b->udph.len) + sizeof(struct iphdr)) | |
981 | goto drop; | |
982 | ||
983 | len = ntohs(b->udph.len) - sizeof(struct udphdr); | |
984 | ext_len = len - (sizeof(*b) - | |
985 | sizeof(struct iphdr) - | |
986 | sizeof(struct udphdr) - | |
987 | sizeof(b->exten)); | |
988 | if (ext_len < 0) | |
989 | goto drop; | |
990 | ||
991 | /* Ok the front looks good, make sure we can get at the rest. */ | |
992 | if (!pskb_may_pull(skb, skb->len)) | |
993 | goto drop; | |
994 | ||
eddc9ec5 | 995 | b = (struct bootp_pkt *)skb_network_header(skb); |
1da177e4 LT |
996 | h = &b->iph; |
997 | ||
998 | /* One reply at a time, please. */ | |
999 | spin_lock(&ic_recv_lock); | |
1000 | ||
1001 | /* If we already have a reply, just drop the packet */ | |
1002 | if (ic_got_reply) | |
1003 | goto drop_unlock; | |
1004 | ||
1005 | /* Find the ic_device that the packet arrived on */ | |
1006 | d = ic_first_dev; | |
1007 | while (d && d->dev != dev) | |
1008 | d = d->next; | |
1009 | if (!d) | |
1010 | goto drop_unlock; /* should never happen */ | |
1011 | ||
1012 | /* Is it a reply to our BOOTP request? */ | |
1013 | if (b->op != BOOTP_REPLY || | |
1014 | b->xid != d->xid) { | |
e87cc472 JP |
1015 | net_err_ratelimited("DHCP/BOOTP: Reply not for us, op[%x] xid[%x]\n", |
1016 | b->op, b->xid); | |
1da177e4 LT |
1017 | goto drop_unlock; |
1018 | } | |
1019 | ||
2513dfb8 CF |
1020 | /* Is it a reply for the device we are configuring? */ |
1021 | if (b->xid != ic_dev_xid) { | |
e87cc472 | 1022 | net_err_ratelimited("DHCP/BOOTP: Ignoring delayed packet\n"); |
2513dfb8 CF |
1023 | goto drop_unlock; |
1024 | } | |
1025 | ||
1da177e4 LT |
1026 | /* Parse extensions */ |
1027 | if (ext_len >= 4 && | |
1028 | !memcmp(b->exten, ic_bootp_cookie, 4)) { /* Check magic cookie */ | |
e905a9ed | 1029 | u8 *end = (u8 *) b + ntohs(b->iph.tot_len); |
1da177e4 LT |
1030 | u8 *ext; |
1031 | ||
1032 | #ifdef IPCONFIG_DHCP | |
1033 | if (ic_proto_enabled & IC_USE_DHCP) { | |
5a874db4 | 1034 | __be32 server_id = NONE; |
1da177e4 LT |
1035 | int mt = 0; |
1036 | ||
1037 | ext = &b->exten[4]; | |
1038 | while (ext < end && *ext != 0xff) { | |
1039 | u8 *opt = ext++; | |
1040 | if (*opt == 0) /* Padding */ | |
1041 | continue; | |
1042 | ext += *ext + 1; | |
1043 | if (ext >= end) | |
1044 | break; | |
1045 | switch (*opt) { | |
1046 | case 53: /* Message type */ | |
1047 | if (opt[1]) | |
1048 | mt = opt[2]; | |
1049 | break; | |
1050 | case 54: /* Server ID (IP address) */ | |
1051 | if (opt[1] >= 4) | |
1052 | memcpy(&server_id, opt + 2, 4); | |
1053 | break; | |
3ff50b79 | 1054 | } |
1da177e4 LT |
1055 | } |
1056 | ||
1057 | #ifdef IPCONFIG_DEBUG | |
1058 | printk("DHCP: Got message type %d\n", mt); | |
1059 | #endif | |
1060 | ||
1061 | switch (mt) { | |
1062 | case DHCPOFFER: | |
1063 | /* While in the process of accepting one offer, | |
1064 | * ignore all others. | |
1065 | */ | |
5a874db4 | 1066 | if (ic_myaddr != NONE) |
1da177e4 LT |
1067 | goto drop_unlock; |
1068 | ||
1069 | /* Let's accept that offer. */ | |
1070 | ic_myaddr = b->your_ip; | |
1071 | ic_servaddr = server_id; | |
1072 | #ifdef IPCONFIG_DEBUG | |
673d57e7 | 1073 | printk("DHCP: Offered address %pI4 by server %pI4\n", |
9dd4a13a | 1074 | &ic_myaddr, &b->iph.saddr); |
1da177e4 LT |
1075 | #endif |
1076 | /* The DHCP indicated server address takes | |
1077 | * precedence over the bootp header one if | |
1078 | * they are different. | |
1079 | */ | |
5a874db4 | 1080 | if ((server_id != NONE) && |
1da177e4 LT |
1081 | (b->server_ip != server_id)) |
1082 | b->server_ip = ic_servaddr; | |
1083 | break; | |
1084 | ||
1085 | case DHCPACK: | |
1086 | if (memcmp(dev->dev_addr, b->hw_addr, dev->addr_len) != 0) | |
1087 | goto drop_unlock; | |
1088 | ||
1089 | /* Yeah! */ | |
1090 | break; | |
1091 | ||
1092 | default: | |
1093 | /* Urque. Forget it*/ | |
5a874db4 AV |
1094 | ic_myaddr = NONE; |
1095 | ic_servaddr = NONE; | |
1da177e4 | 1096 | goto drop_unlock; |
3ff50b79 | 1097 | } |
1da177e4 LT |
1098 | |
1099 | ic_dhcp_msgtype = mt; | |
1100 | ||
1101 | } | |
1102 | #endif /* IPCONFIG_DHCP */ | |
1103 | ||
1104 | ext = &b->exten[4]; | |
1105 | while (ext < end && *ext != 0xff) { | |
1106 | u8 *opt = ext++; | |
1107 | if (*opt == 0) /* Padding */ | |
1108 | continue; | |
1109 | ext += *ext + 1; | |
1110 | if (ext < end) | |
1111 | ic_do_bootp_ext(opt); | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | /* We have a winner! */ | |
1116 | ic_dev = dev; | |
1117 | ic_myaddr = b->your_ip; | |
1118 | ic_servaddr = b->server_ip; | |
9dd4a13a | 1119 | ic_addrservaddr = b->iph.saddr; |
5a874db4 | 1120 | if (ic_gateway == NONE && b->relay_ip) |
1da177e4 | 1121 | ic_gateway = b->relay_ip; |
5a874db4 | 1122 | if (ic_nameservers[0] == NONE) |
1da177e4 LT |
1123 | ic_nameservers[0] = ic_servaddr; |
1124 | ic_got_reply = IC_BOOTP; | |
1125 | ||
1126 | drop_unlock: | |
1127 | /* Show's over. Nothing to see here. */ | |
1128 | spin_unlock(&ic_recv_lock); | |
1129 | ||
1130 | drop: | |
1131 | /* Throw the packet out. */ | |
1132 | kfree_skb(skb); | |
1133 | ||
1134 | return 0; | |
e905a9ed | 1135 | } |
1da177e4 LT |
1136 | |
1137 | ||
1138 | #endif | |
1139 | ||
1140 | ||
1141 | /* | |
1142 | * Dynamic IP configuration -- DHCP, BOOTP, RARP. | |
1143 | */ | |
1144 | ||
1145 | #ifdef IPCONFIG_DYNAMIC | |
1146 | ||
1147 | static int __init ic_dynamic(void) | |
1148 | { | |
1149 | int retries; | |
1150 | struct ic_device *d; | |
1151 | unsigned long start_jiffies, timeout, jiff; | |
1152 | int do_bootp = ic_proto_have_if & IC_BOOTP; | |
1153 | int do_rarp = ic_proto_have_if & IC_RARP; | |
1154 | ||
1155 | /* | |
1156 | * If none of DHCP/BOOTP/RARP was selected, return with an error. | |
1157 | * This routine gets only called when some pieces of information | |
1158 | * are missing, and without DHCP/BOOTP/RARP we are unable to get it. | |
1159 | */ | |
1160 | if (!ic_proto_enabled) { | |
058bd4d2 | 1161 | pr_err("IP-Config: Incomplete network configuration information\n"); |
1da177e4 LT |
1162 | return -1; |
1163 | } | |
1164 | ||
1165 | #ifdef IPCONFIG_BOOTP | |
1166 | if ((ic_proto_enabled ^ ic_proto_have_if) & IC_BOOTP) | |
058bd4d2 | 1167 | pr_err("DHCP/BOOTP: No suitable device found\n"); |
1da177e4 LT |
1168 | #endif |
1169 | #ifdef IPCONFIG_RARP | |
1170 | if ((ic_proto_enabled ^ ic_proto_have_if) & IC_RARP) | |
058bd4d2 | 1171 | pr_err("RARP: No suitable device found\n"); |
1da177e4 LT |
1172 | #endif |
1173 | ||
1174 | if (!ic_proto_have_if) | |
1175 | /* Error message already printed */ | |
1176 | return -1; | |
1177 | ||
1178 | /* | |
1179 | * Setup protocols | |
1180 | */ | |
1181 | #ifdef IPCONFIG_BOOTP | |
1182 | if (do_bootp) | |
1183 | ic_bootp_init(); | |
1184 | #endif | |
1185 | #ifdef IPCONFIG_RARP | |
1186 | if (do_rarp) | |
1187 | ic_rarp_init(); | |
1188 | #endif | |
1189 | ||
1190 | /* | |
1191 | * Send requests and wait, until we get an answer. This loop | |
1192 | * seems to be a terrible waste of CPU time, but actually there is | |
1193 | * only one process running at all, so we don't need to use any | |
1194 | * scheduler functions. | |
e905a9ed | 1195 | * [Actually we could now, but the nothing else running note still |
1da177e4 LT |
1196 | * applies.. - AC] |
1197 | */ | |
058bd4d2 JP |
1198 | pr_notice("Sending %s%s%s requests .", |
1199 | do_bootp | |
1200 | ? ((ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP") : "", | |
1201 | (do_bootp && do_rarp) ? " and " : "", | |
1202 | do_rarp ? "RARP" : ""); | |
1da177e4 LT |
1203 | |
1204 | start_jiffies = jiffies; | |
1205 | d = ic_first_dev; | |
1206 | retries = CONF_SEND_RETRIES; | |
1207 | get_random_bytes(&timeout, sizeof(timeout)); | |
95c96174 | 1208 | timeout = CONF_BASE_TIMEOUT + (timeout % (unsigned int) CONF_TIMEOUT_RANDOM); |
132adf54 | 1209 | for (;;) { |
2513dfb8 CF |
1210 | /* Track the device we are configuring */ |
1211 | ic_dev_xid = d->xid; | |
1212 | ||
1da177e4 LT |
1213 | #ifdef IPCONFIG_BOOTP |
1214 | if (do_bootp && (d->able & IC_BOOTP)) | |
1215 | ic_bootp_send_if(d, jiffies - start_jiffies); | |
1216 | #endif | |
1217 | #ifdef IPCONFIG_RARP | |
1218 | if (do_rarp && (d->able & IC_RARP)) | |
1219 | ic_rarp_send_if(d); | |
1220 | #endif | |
1221 | ||
1222 | jiff = jiffies + (d->next ? CONF_INTER_TIMEOUT : timeout); | |
121caf57 NA |
1223 | while (time_before(jiffies, jiff) && !ic_got_reply) |
1224 | schedule_timeout_uninterruptible(1); | |
1da177e4 LT |
1225 | #ifdef IPCONFIG_DHCP |
1226 | /* DHCP isn't done until we get a DHCPACK. */ | |
9d4fb27d JP |
1227 | if ((ic_got_reply & IC_BOOTP) && |
1228 | (ic_proto_enabled & IC_USE_DHCP) && | |
1229 | ic_dhcp_msgtype != DHCPACK) { | |
1da177e4 | 1230 | ic_got_reply = 0; |
058bd4d2 | 1231 | pr_cont(","); |
1da177e4 LT |
1232 | continue; |
1233 | } | |
1234 | #endif /* IPCONFIG_DHCP */ | |
1235 | ||
1236 | if (ic_got_reply) { | |
058bd4d2 | 1237 | pr_cont(" OK\n"); |
1da177e4 LT |
1238 | break; |
1239 | } | |
1240 | ||
1241 | if ((d = d->next)) | |
1242 | continue; | |
1243 | ||
1244 | if (! --retries) { | |
058bd4d2 | 1245 | pr_cont(" timed out!\n"); |
1da177e4 LT |
1246 | break; |
1247 | } | |
1248 | ||
1249 | d = ic_first_dev; | |
1250 | ||
1251 | timeout = timeout CONF_TIMEOUT_MULT; | |
1252 | if (timeout > CONF_TIMEOUT_MAX) | |
1253 | timeout = CONF_TIMEOUT_MAX; | |
1254 | ||
058bd4d2 | 1255 | pr_cont("."); |
1da177e4 LT |
1256 | } |
1257 | ||
1258 | #ifdef IPCONFIG_BOOTP | |
1259 | if (do_bootp) | |
1260 | ic_bootp_cleanup(); | |
1261 | #endif | |
1262 | #ifdef IPCONFIG_RARP | |
1263 | if (do_rarp) | |
1264 | ic_rarp_cleanup(); | |
1265 | #endif | |
1266 | ||
7a1af5d7 | 1267 | if (!ic_got_reply) { |
5a874db4 | 1268 | ic_myaddr = NONE; |
1da177e4 | 1269 | return -1; |
7a1af5d7 | 1270 | } |
1da177e4 | 1271 | |
673d57e7 | 1272 | printk("IP-Config: Got %s answer from %pI4, ", |
e905a9ed | 1273 | ((ic_got_reply & IC_RARP) ? "RARP" |
1da177e4 | 1274 | : (ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP"), |
9dd4a13a | 1275 | &ic_addrservaddr); |
058bd4d2 | 1276 | pr_cont("my address is %pI4\n", &ic_myaddr); |
1da177e4 LT |
1277 | |
1278 | return 0; | |
1279 | } | |
1280 | ||
1281 | #endif /* IPCONFIG_DYNAMIC */ | |
1282 | ||
1283 | #ifdef CONFIG_PROC_FS | |
1284 | ||
1285 | static int pnp_seq_show(struct seq_file *seq, void *v) | |
1286 | { | |
1287 | int i; | |
1288 | ||
1289 | if (ic_proto_used & IC_PROTO) | |
1290 | seq_printf(seq, "#PROTO: %s\n", | |
1291 | (ic_proto_used & IC_RARP) ? "RARP" | |
1292 | : (ic_proto_used & IC_USE_DHCP) ? "DHCP" : "BOOTP"); | |
1293 | else | |
1294 | seq_puts(seq, "#MANUAL\n"); | |
1295 | ||
1296 | if (ic_domain[0]) | |
1297 | seq_printf(seq, | |
1298 | "domain %s\n", ic_domain); | |
1299 | for (i = 0; i < CONF_NAMESERVERS_MAX; i++) { | |
5a874db4 | 1300 | if (ic_nameservers[i] != NONE) |
673d57e7 HH |
1301 | seq_printf(seq, "nameserver %pI4\n", |
1302 | &ic_nameservers[i]); | |
1da177e4 | 1303 | } |
5a874db4 | 1304 | if (ic_servaddr != NONE) |
673d57e7 HH |
1305 | seq_printf(seq, "bootserver %pI4\n", |
1306 | &ic_servaddr); | |
1da177e4 LT |
1307 | return 0; |
1308 | } | |
1309 | ||
1310 | static int pnp_seq_open(struct inode *indoe, struct file *file) | |
1311 | { | |
1312 | return single_open(file, pnp_seq_show, NULL); | |
1313 | } | |
1314 | ||
9a32144e | 1315 | static const struct file_operations pnp_seq_fops = { |
1da177e4 LT |
1316 | .owner = THIS_MODULE, |
1317 | .open = pnp_seq_open, | |
1318 | .read = seq_read, | |
1319 | .llseek = seq_lseek, | |
1320 | .release = single_release, | |
1321 | }; | |
1322 | #endif /* CONFIG_PROC_FS */ | |
1323 | ||
1324 | /* | |
1325 | * Extract IP address from the parameter string if needed. Note that we | |
1326 | * need to have root_server_addr set _before_ IPConfig gets called as it | |
1327 | * can override it. | |
1328 | */ | |
5a874db4 | 1329 | __be32 __init root_nfs_parse_addr(char *name) |
1da177e4 | 1330 | { |
5a874db4 | 1331 | __be32 addr; |
1da177e4 LT |
1332 | int octets = 0; |
1333 | char *cp, *cq; | |
1334 | ||
1335 | cp = cq = name; | |
1336 | while (octets < 4) { | |
1337 | while (*cp >= '0' && *cp <= '9') | |
1338 | cp++; | |
1339 | if (cp == cq || cp - cq > 3) | |
1340 | break; | |
1341 | if (*cp == '.' || octets == 3) | |
1342 | octets++; | |
1343 | if (octets < 4) | |
1344 | cp++; | |
1345 | cq = cp; | |
1346 | } | |
1347 | if (octets == 4 && (*cp == ':' || *cp == '\0')) { | |
1348 | if (*cp == ':') | |
1349 | *cp++ = '\0'; | |
1350 | addr = in_aton(name); | |
1351 | memmove(name, cp, strlen(cp) + 1); | |
1352 | } else | |
5a874db4 | 1353 | addr = NONE; |
1da177e4 LT |
1354 | |
1355 | return addr; | |
1356 | } | |
1357 | ||
964ad81c DM |
1358 | #define DEVICE_WAIT_MAX 12 /* 12 seconds */ |
1359 | ||
1360 | static int __init wait_for_devices(void) | |
1361 | { | |
1362 | int i; | |
1363 | ||
964ad81c DM |
1364 | for (i = 0; i < DEVICE_WAIT_MAX; i++) { |
1365 | struct net_device *dev; | |
1366 | int found = 0; | |
1367 | ||
1368 | rtnl_lock(); | |
1369 | for_each_netdev(&init_net, dev) { | |
3fb72f1e | 1370 | if (ic_is_init_dev(dev)) { |
964ad81c DM |
1371 | found = 1; |
1372 | break; | |
1373 | } | |
1374 | } | |
1375 | rtnl_unlock(); | |
1376 | if (found) | |
1377 | return 0; | |
1378 | ssleep(1); | |
1379 | } | |
1380 | return -ENODEV; | |
1381 | } | |
1382 | ||
1da177e4 LT |
1383 | /* |
1384 | * IP Autoconfig dispatcher. | |
1385 | */ | |
1386 | ||
1387 | static int __init ip_auto_config(void) | |
1388 | { | |
5a874db4 | 1389 | __be32 addr; |
9d8dba6c BZ |
1390 | #ifdef IPCONFIG_DYNAMIC |
1391 | int retries = CONF_OPEN_RETRIES; | |
1392 | #endif | |
964ad81c | 1393 | int err; |
5e953778 | 1394 | unsigned int i; |
1da177e4 LT |
1395 | |
1396 | #ifdef CONFIG_PROC_FS | |
d4beaa66 | 1397 | proc_create("pnp", S_IRUGO, init_net.proc_net, &pnp_seq_fops); |
1da177e4 LT |
1398 | #endif /* CONFIG_PROC_FS */ |
1399 | ||
1400 | if (!ic_enable) | |
1401 | return 0; | |
1402 | ||
1403 | DBG(("IP-Config: Entered.\n")); | |
1404 | #ifdef IPCONFIG_DYNAMIC | |
1405 | try_try_again: | |
1406 | #endif | |
964ad81c DM |
1407 | /* Wait for devices to appear */ |
1408 | err = wait_for_devices(); | |
1409 | if (err) | |
1410 | return err; | |
1da177e4 LT |
1411 | |
1412 | /* Setup all network devices */ | |
964ad81c DM |
1413 | err = ic_open_devs(); |
1414 | if (err) | |
1415 | return err; | |
1da177e4 LT |
1416 | |
1417 | /* Give drivers a chance to settle */ | |
3fb72f1e | 1418 | msleep(CONF_POST_OPEN); |
1da177e4 LT |
1419 | |
1420 | /* | |
1421 | * If the config information is insufficient (e.g., our IP address or | |
1422 | * IP address of the boot server is missing or we have multiple network | |
1423 | * interfaces and no default was set), use BOOTP or RARP to get the | |
1424 | * missing values. | |
1425 | */ | |
5a874db4 | 1426 | if (ic_myaddr == NONE || |
1da177e4 | 1427 | #ifdef CONFIG_ROOT_NFS |
9d4fb27d JP |
1428 | (root_server_addr == NONE && |
1429 | ic_servaddr == NONE && | |
1430 | ROOT_DEV == Root_NFS) || | |
1da177e4 LT |
1431 | #endif |
1432 | ic_first_dev->next) { | |
1433 | #ifdef IPCONFIG_DYNAMIC | |
1da177e4 LT |
1434 | if (ic_dynamic() < 0) { |
1435 | ic_close_devs(); | |
1436 | ||
1437 | /* | |
1438 | * I don't know why, but sometimes the | |
1439 | * eepro100 driver (at least) gets upset and | |
1440 | * doesn't work the first time it's opened. | |
1441 | * But then if you close it and reopen it, it | |
1442 | * works just fine. So we need to try that at | |
1443 | * least once before giving up. | |
1444 | * | |
1445 | * Also, if the root will be NFS-mounted, we | |
1446 | * have nowhere to go if DHCP fails. So we | |
1447 | * just have to keep trying forever. | |
1448 | * | |
1449 | * -- Chip | |
1450 | */ | |
1451 | #ifdef CONFIG_ROOT_NFS | |
1452 | if (ROOT_DEV == Root_NFS) { | |
058bd4d2 | 1453 | pr_err("IP-Config: Retrying forever (NFS root)...\n"); |
1da177e4 LT |
1454 | goto try_try_again; |
1455 | } | |
1456 | #endif | |
1457 | ||
1458 | if (--retries) { | |
058bd4d2 | 1459 | pr_err("IP-Config: Reopening network devices...\n"); |
1da177e4 LT |
1460 | goto try_try_again; |
1461 | } | |
1462 | ||
1463 | /* Oh, well. At least we tried. */ | |
058bd4d2 | 1464 | pr_err("IP-Config: Auto-configuration of network failed\n"); |
1da177e4 LT |
1465 | return -1; |
1466 | } | |
1467 | #else /* !DYNAMIC */ | |
058bd4d2 | 1468 | pr_err("IP-Config: Incomplete network configuration information\n"); |
1da177e4 LT |
1469 | ic_close_devs(); |
1470 | return -1; | |
1471 | #endif /* IPCONFIG_DYNAMIC */ | |
1472 | } else { | |
1473 | /* Device selected manually or only one device -> use it */ | |
1474 | ic_dev = ic_first_dev->dev; | |
1475 | } | |
1476 | ||
1477 | addr = root_nfs_parse_addr(root_server_path); | |
5a874db4 | 1478 | if (root_server_addr == NONE) |
1da177e4 LT |
1479 | root_server_addr = addr; |
1480 | ||
1481 | /* | |
25985edc | 1482 | * Use defaults wherever applicable. |
1da177e4 LT |
1483 | */ |
1484 | if (ic_defaults() < 0) | |
1485 | return -1; | |
1486 | ||
1487 | /* | |
1488 | * Close all network devices except the device we've | |
1489 | * autoconfigured and set up routes. | |
1490 | */ | |
1491 | ic_close_devs(); | |
1492 | if (ic_setup_if() < 0 || ic_setup_routes() < 0) | |
1493 | return -1; | |
1494 | ||
1495 | /* | |
1496 | * Record which protocol was actually used. | |
1497 | */ | |
1498 | #ifdef IPCONFIG_DYNAMIC | |
1499 | ic_proto_used = ic_got_reply | (ic_proto_enabled & IC_USE_DHCP); | |
1500 | #endif | |
1501 | ||
1502 | #ifndef IPCONFIG_SILENT | |
1503 | /* | |
1504 | * Clue in the operator. | |
1505 | */ | |
058bd4d2 | 1506 | pr_info("IP-Config: Complete:\n"); |
9ecd1c3d CF |
1507 | |
1508 | pr_info(" device=%s, hwaddr=%*phC, ipaddr=%pI4, mask=%pI4, gw=%pI4\n", | |
1509 | ic_dev->name, ic_dev->addr_len, ic_dev->dev_addr, | |
1510 | &ic_myaddr, &ic_netmask, &ic_gateway); | |
058bd4d2 JP |
1511 | pr_info(" host=%s, domain=%s, nis-domain=%s\n", |
1512 | utsname()->nodename, ic_domain, utsname()->domainname); | |
1513 | pr_info(" bootserver=%pI4, rootserver=%pI4, rootpath=%s", | |
1514 | &ic_servaddr, &root_server_addr, root_server_path); | |
9643f455 | 1515 | if (ic_dev_mtu) |
058bd4d2 | 1516 | pr_cont(", mtu=%d", ic_dev_mtu); |
5e953778 CF |
1517 | for (i = 0; i < CONF_NAMESERVERS_MAX; i++) |
1518 | if (ic_nameservers[i] != NONE) { | |
1519 | pr_info(" nameserver%u=%pI4", | |
1520 | i, &ic_nameservers[i]); | |
1521 | break; | |
1522 | } | |
1523 | for (i++; i < CONF_NAMESERVERS_MAX; i++) | |
1524 | if (ic_nameservers[i] != NONE) | |
283951f9 MF |
1525 | pr_cont(", nameserver%u=%pI4", i, &ic_nameservers[i]); |
1526 | pr_cont("\n"); | |
1da177e4 LT |
1527 | #endif /* !SILENT */ |
1528 | ||
1529 | return 0; | |
1530 | } | |
1531 | ||
1532 | late_initcall(ip_auto_config); | |
1533 | ||
1534 | ||
1535 | /* | |
1536 | * Decode any IP configuration options in the "ip=" or "nfsaddrs=" kernel | |
dc7a0816 | 1537 | * command line parameter. See Documentation/filesystems/nfs/nfsroot.txt. |
1da177e4 LT |
1538 | */ |
1539 | static int __init ic_proto_name(char *name) | |
1540 | { | |
1541 | if (!strcmp(name, "on") || !strcmp(name, "any")) { | |
1542 | return 1; | |
1543 | } | |
a6c05c3d | 1544 | if (!strcmp(name, "off") || !strcmp(name, "none")) { |
92ffb85d | 1545 | return 0; |
a6c05c3d | 1546 | } |
1da177e4 LT |
1547 | #ifdef CONFIG_IP_PNP_DHCP |
1548 | else if (!strcmp(name, "dhcp")) { | |
1549 | ic_proto_enabled &= ~IC_RARP; | |
1550 | return 1; | |
1551 | } | |
1552 | #endif | |
1553 | #ifdef CONFIG_IP_PNP_BOOTP | |
1554 | else if (!strcmp(name, "bootp")) { | |
1555 | ic_proto_enabled &= ~(IC_RARP | IC_USE_DHCP); | |
1556 | return 1; | |
1557 | } | |
1558 | #endif | |
1559 | #ifdef CONFIG_IP_PNP_RARP | |
1560 | else if (!strcmp(name, "rarp")) { | |
1561 | ic_proto_enabled &= ~(IC_BOOTP | IC_USE_DHCP); | |
1562 | return 1; | |
1563 | } | |
1564 | #endif | |
1565 | #ifdef IPCONFIG_DYNAMIC | |
1566 | else if (!strcmp(name, "both")) { | |
1567 | ic_proto_enabled &= ~IC_USE_DHCP; /* backward compat :-( */ | |
1568 | return 1; | |
1569 | } | |
1570 | #endif | |
1571 | return 0; | |
1572 | } | |
1573 | ||
1574 | static int __init ip_auto_config_setup(char *addrs) | |
1575 | { | |
1576 | char *cp, *ip, *dp; | |
1577 | int num = 0; | |
1578 | ||
1579 | ic_set_manually = 1; | |
9cecd07c | 1580 | ic_enable = 1; |
1da177e4 | 1581 | |
92ffb85d AW |
1582 | /* |
1583 | * If any dhcp, bootp etc options are set, leave autoconfig on | |
1584 | * and skip the below static IP processing. | |
1585 | */ | |
1da177e4 LT |
1586 | if (ic_proto_name(addrs)) |
1587 | return 1; | |
1588 | ||
92ffb85d AW |
1589 | /* If no static IP is given, turn off autoconfig and bail. */ |
1590 | if (*addrs == 0 || | |
1591 | strcmp(addrs, "off") == 0 || | |
1592 | strcmp(addrs, "none") == 0) { | |
1593 | ic_enable = 0; | |
1594 | return 1; | |
1595 | } | |
1596 | ||
5e953778 CF |
1597 | ic_nameservers_predef(); |
1598 | ||
92ffb85d | 1599 | /* Parse string for static IP assignment. */ |
1da177e4 LT |
1600 | ip = addrs; |
1601 | while (ip && *ip) { | |
1602 | if ((cp = strchr(ip, ':'))) | |
1603 | *cp++ = '\0'; | |
1604 | if (strlen(ip) > 0) { | |
1605 | DBG(("IP-Config: Parameter #%d: `%s'\n", num, ip)); | |
1606 | switch (num) { | |
1607 | case 0: | |
e6f1cebf | 1608 | if ((ic_myaddr = in_aton(ip)) == ANY) |
5a874db4 | 1609 | ic_myaddr = NONE; |
1da177e4 LT |
1610 | break; |
1611 | case 1: | |
e6f1cebf | 1612 | if ((ic_servaddr = in_aton(ip)) == ANY) |
5a874db4 | 1613 | ic_servaddr = NONE; |
1da177e4 LT |
1614 | break; |
1615 | case 2: | |
e6f1cebf | 1616 | if ((ic_gateway = in_aton(ip)) == ANY) |
5a874db4 | 1617 | ic_gateway = NONE; |
1da177e4 LT |
1618 | break; |
1619 | case 3: | |
e6f1cebf | 1620 | if ((ic_netmask = in_aton(ip)) == ANY) |
5a874db4 | 1621 | ic_netmask = NONE; |
1da177e4 LT |
1622 | break; |
1623 | case 4: | |
1624 | if ((dp = strchr(ip, '.'))) { | |
1625 | *dp++ = '\0'; | |
e9ff3990 SH |
1626 | strlcpy(utsname()->domainname, dp, |
1627 | sizeof(utsname()->domainname)); | |
1da177e4 | 1628 | } |
e9ff3990 SH |
1629 | strlcpy(utsname()->nodename, ip, |
1630 | sizeof(utsname()->nodename)); | |
1da177e4 LT |
1631 | ic_host_name_set = 1; |
1632 | break; | |
1633 | case 5: | |
1634 | strlcpy(user_dev_name, ip, sizeof(user_dev_name)); | |
1635 | break; | |
1636 | case 6: | |
92ffb85d AW |
1637 | if (ic_proto_name(ip) == 0 && |
1638 | ic_myaddr == NONE) { | |
1639 | ic_enable = 0; | |
1640 | } | |
1da177e4 | 1641 | break; |
5e953778 CF |
1642 | case 7: |
1643 | if (CONF_NAMESERVERS_MAX >= 1) { | |
1644 | ic_nameservers[0] = in_aton(ip); | |
1645 | if (ic_nameservers[0] == ANY) | |
1646 | ic_nameservers[0] = NONE; | |
1647 | } | |
1648 | break; | |
1649 | case 8: | |
1650 | if (CONF_NAMESERVERS_MAX >= 2) { | |
1651 | ic_nameservers[1] = in_aton(ip); | |
1652 | if (ic_nameservers[1] == ANY) | |
1653 | ic_nameservers[1] = NONE; | |
1654 | } | |
1655 | break; | |
1da177e4 LT |
1656 | } |
1657 | } | |
1658 | ip = cp; | |
1659 | num++; | |
1660 | } | |
1661 | ||
1662 | return 1; | |
1663 | } | |
b37f4d7b | 1664 | __setup("ip=", ip_auto_config_setup); |
1da177e4 LT |
1665 | |
1666 | static int __init nfsaddrs_config_setup(char *addrs) | |
1667 | { | |
1668 | return ip_auto_config_setup(addrs); | |
1669 | } | |
b37f4d7b | 1670 | __setup("nfsaddrs=", nfsaddrs_config_setup); |
1da177e4 | 1671 | |
62013dbb RJ |
1672 | static int __init vendor_class_identifier_setup(char *addrs) |
1673 | { | |
1674 | if (strlcpy(vendor_class_identifier, addrs, | |
1675 | sizeof(vendor_class_identifier)) | |
1676 | >= sizeof(vendor_class_identifier)) | |
058bd4d2 JP |
1677 | pr_warn("DHCP: vendorclass too long, truncated to \"%s\"", |
1678 | vendor_class_identifier); | |
62013dbb RJ |
1679 | return 1; |
1680 | } | |
62013dbb | 1681 | __setup("dhcpclass=", vendor_class_identifier_setup); |