]>
Commit | Line | Data |
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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 | |
5a874db4 | 139 | __be32 ic_servaddr = NONE; /* Boot server IP address */ |
1da177e4 | 140 | |
5a874db4 | 141 | __be32 root_server_addr = NONE; /* Address of NFS server */ |
1da177e4 LT |
142 | u8 root_server_path[256] = { 0, }; /* Path to mount as root */ |
143 | ||
2513dfb8 CF |
144 | u32 ic_dev_xid; /* Device under configuration */ |
145 | ||
1b0b04f9 DM |
146 | /* vendor class identifier */ |
147 | static char vendor_class_identifier[253] __initdata; | |
62013dbb | 148 | |
1da177e4 LT |
149 | /* Persistent data: */ |
150 | ||
151 | static int ic_proto_used; /* Protocol used, if any */ | |
5a874db4 | 152 | static __be32 ic_nameservers[CONF_NAMESERVERS_MAX]; /* DNS Server IP addresses */ |
1da177e4 LT |
153 | static u8 ic_domain[64]; /* DNS (not NIS) domain name */ |
154 | ||
155 | /* | |
156 | * Private state. | |
157 | */ | |
158 | ||
159 | /* Name of user-selected boot device */ | |
160 | static char user_dev_name[IFNAMSIZ] __initdata = { 0, }; | |
161 | ||
162 | /* Protocols supported by available interfaces */ | |
163 | static int ic_proto_have_if __initdata = 0; | |
164 | ||
9643f455 CF |
165 | /* MTU for boot device */ |
166 | static int ic_dev_mtu __initdata = 0; | |
167 | ||
1da177e4 LT |
168 | #ifdef IPCONFIG_DYNAMIC |
169 | static DEFINE_SPINLOCK(ic_recv_lock); | |
170 | static volatile int ic_got_reply __initdata = 0; /* Proto(s) that replied */ | |
171 | #endif | |
172 | #ifdef IPCONFIG_DHCP | |
173 | static int ic_dhcp_msgtype __initdata = 0; /* DHCP msg type received */ | |
174 | #endif | |
175 | ||
176 | ||
177 | /* | |
178 | * Network devices | |
179 | */ | |
180 | ||
181 | struct ic_device { | |
182 | struct ic_device *next; | |
183 | struct net_device *dev; | |
184 | unsigned short flags; | |
185 | short able; | |
5a874db4 | 186 | __be32 xid; |
1da177e4 LT |
187 | }; |
188 | ||
189 | static struct ic_device *ic_first_dev __initdata = NULL;/* List of open device */ | |
190 | static struct net_device *ic_dev __initdata = NULL; /* Selected device */ | |
191 | ||
3fb72f1e | 192 | static bool __init ic_is_init_dev(struct net_device *dev) |
964ad81c | 193 | { |
3fb72f1e MN |
194 | if (dev->flags & IFF_LOOPBACK) |
195 | return false; | |
196 | return user_dev_name[0] ? !strcmp(dev->name, user_dev_name) : | |
964ad81c DM |
197 | (!(dev->flags & IFF_LOOPBACK) && |
198 | (dev->flags & (IFF_POINTOPOINT|IFF_BROADCAST)) && | |
3fb72f1e | 199 | strncmp(dev->name, "dummy", 5)); |
964ad81c DM |
200 | } |
201 | ||
1da177e4 LT |
202 | static int __init ic_open_devs(void) |
203 | { | |
204 | struct ic_device *d, **last; | |
205 | struct net_device *dev; | |
206 | unsigned short oflags; | |
3fb72f1e | 207 | unsigned long start; |
1da177e4 LT |
208 | |
209 | last = &ic_first_dev; | |
6756ae4b | 210 | rtnl_lock(); |
1da177e4 LT |
211 | |
212 | /* bring loopback device up first */ | |
0cc217e1 EB |
213 | for_each_netdev(&init_net, dev) { |
214 | if (!(dev->flags & IFF_LOOPBACK)) | |
215 | continue; | |
216 | if (dev_change_flags(dev, dev->flags | IFF_UP) < 0) | |
217 | printk(KERN_ERR "IP-Config: Failed to open %s\n", dev->name); | |
218 | } | |
1da177e4 | 219 | |
881d966b | 220 | for_each_netdev(&init_net, dev) { |
3fb72f1e | 221 | if (ic_is_init_dev(dev)) { |
1da177e4 LT |
222 | int able = 0; |
223 | if (dev->mtu >= 364) | |
224 | able |= IC_BOOTP; | |
225 | else | |
226 | printk(KERN_WARNING "DHCP/BOOTP: Ignoring device %s, MTU %d too small", dev->name, dev->mtu); | |
227 | if (!(dev->flags & IFF_NOARP)) | |
228 | able |= IC_RARP; | |
229 | able &= ic_proto_enabled; | |
230 | if (ic_proto_enabled && !able) | |
231 | continue; | |
232 | oflags = dev->flags; | |
233 | if (dev_change_flags(dev, oflags | IFF_UP) < 0) { | |
234 | printk(KERN_ERR "IP-Config: Failed to open %s\n", dev->name); | |
235 | continue; | |
236 | } | |
237 | if (!(d = kmalloc(sizeof(struct ic_device), GFP_KERNEL))) { | |
6756ae4b | 238 | rtnl_unlock(); |
964ad81c | 239 | return -ENOMEM; |
1da177e4 LT |
240 | } |
241 | d->dev = dev; | |
242 | *last = d; | |
243 | last = &d->next; | |
244 | d->flags = oflags; | |
245 | d->able = able; | |
246 | if (able & IC_BOOTP) | |
5a874db4 | 247 | get_random_bytes(&d->xid, sizeof(__be32)); |
1da177e4 LT |
248 | else |
249 | d->xid = 0; | |
250 | ic_proto_have_if |= able; | |
251 | DBG(("IP-Config: %s UP (able=%d, xid=%08x)\n", | |
252 | dev->name, able, d->xid)); | |
253 | } | |
254 | } | |
3fb72f1e MN |
255 | |
256 | /* wait for a carrier on at least one device */ | |
257 | start = jiffies; | |
258 | while (jiffies - start < msecs_to_jiffies(CONF_CARRIER_TIMEOUT)) { | |
259 | for_each_netdev(&init_net, dev) | |
260 | if (ic_is_init_dev(dev) && netif_carrier_ok(dev)) | |
261 | goto have_carrier; | |
262 | ||
263 | msleep(1); | |
264 | } | |
265 | have_carrier: | |
6756ae4b | 266 | rtnl_unlock(); |
1da177e4 LT |
267 | |
268 | *last = NULL; | |
269 | ||
270 | if (!ic_first_dev) { | |
271 | if (user_dev_name[0]) | |
272 | printk(KERN_ERR "IP-Config: Device `%s' not found.\n", user_dev_name); | |
273 | else | |
274 | printk(KERN_ERR "IP-Config: No network devices available.\n"); | |
964ad81c | 275 | return -ENODEV; |
1da177e4 LT |
276 | } |
277 | return 0; | |
278 | } | |
279 | ||
280 | static void __init ic_close_devs(void) | |
281 | { | |
282 | struct ic_device *d, *next; | |
283 | struct net_device *dev; | |
284 | ||
6756ae4b | 285 | rtnl_lock(); |
1da177e4 LT |
286 | next = ic_first_dev; |
287 | while ((d = next)) { | |
288 | next = d->next; | |
289 | dev = d->dev; | |
290 | if (dev != ic_dev) { | |
291 | DBG(("IP-Config: Downing %s\n", dev->name)); | |
292 | dev_change_flags(dev, d->flags); | |
293 | } | |
294 | kfree(d); | |
295 | } | |
6756ae4b | 296 | rtnl_unlock(); |
1da177e4 LT |
297 | } |
298 | ||
299 | /* | |
300 | * Interface to various network functions. | |
301 | */ | |
302 | ||
303 | static inline void | |
5a874db4 | 304 | set_sockaddr(struct sockaddr_in *sin, __be32 addr, __be16 port) |
1da177e4 LT |
305 | { |
306 | sin->sin_family = AF_INET; | |
307 | sin->sin_addr.s_addr = addr; | |
308 | sin->sin_port = port; | |
309 | } | |
310 | ||
9643f455 | 311 | static int __init ic_devinet_ioctl(unsigned int cmd, struct ifreq *arg) |
1da177e4 LT |
312 | { |
313 | int res; | |
314 | ||
315 | mm_segment_t oldfs = get_fs(); | |
316 | set_fs(get_ds()); | |
e5b13cb1 | 317 | res = devinet_ioctl(&init_net, cmd, (struct ifreq __user *) arg); |
1da177e4 LT |
318 | set_fs(oldfs); |
319 | return res; | |
320 | } | |
321 | ||
9643f455 CF |
322 | static int __init ic_dev_ioctl(unsigned int cmd, struct ifreq *arg) |
323 | { | |
324 | int res; | |
325 | ||
326 | mm_segment_t oldfs = get_fs(); | |
327 | set_fs(get_ds()); | |
328 | res = dev_ioctl(&init_net, cmd, (struct ifreq __user *) arg); | |
329 | set_fs(oldfs); | |
330 | return res; | |
331 | } | |
332 | ||
1da177e4 LT |
333 | static int __init ic_route_ioctl(unsigned int cmd, struct rtentry *arg) |
334 | { | |
335 | int res; | |
336 | ||
337 | mm_segment_t oldfs = get_fs(); | |
338 | set_fs(get_ds()); | |
1bad118a | 339 | res = ip_rt_ioctl(&init_net, cmd, (void __user *) arg); |
1da177e4 LT |
340 | set_fs(oldfs); |
341 | return res; | |
342 | } | |
343 | ||
344 | /* | |
345 | * Set up interface addresses and routes. | |
346 | */ | |
347 | ||
348 | static int __init ic_setup_if(void) | |
349 | { | |
350 | struct ifreq ir; | |
351 | struct sockaddr_in *sin = (void *) &ir.ifr_ifru.ifru_addr; | |
352 | int err; | |
353 | ||
354 | memset(&ir, 0, sizeof(ir)); | |
355 | strcpy(ir.ifr_ifrn.ifrn_name, ic_dev->name); | |
356 | set_sockaddr(sin, ic_myaddr, 0); | |
9643f455 | 357 | if ((err = ic_devinet_ioctl(SIOCSIFADDR, &ir)) < 0) { |
1da177e4 LT |
358 | printk(KERN_ERR "IP-Config: Unable to set interface address (%d).\n", err); |
359 | return -1; | |
360 | } | |
361 | set_sockaddr(sin, ic_netmask, 0); | |
9643f455 | 362 | if ((err = ic_devinet_ioctl(SIOCSIFNETMASK, &ir)) < 0) { |
1da177e4 LT |
363 | printk(KERN_ERR "IP-Config: Unable to set interface netmask (%d).\n", err); |
364 | return -1; | |
365 | } | |
366 | set_sockaddr(sin, ic_myaddr | ~ic_netmask, 0); | |
9643f455 | 367 | if ((err = ic_devinet_ioctl(SIOCSIFBRDADDR, &ir)) < 0) { |
1da177e4 LT |
368 | printk(KERN_ERR "IP-Config: Unable to set interface broadcast address (%d).\n", err); |
369 | return -1; | |
370 | } | |
9643f455 CF |
371 | /* Handle the case where we need non-standard MTU on the boot link (a network |
372 | * using jumbo frames, for instance). If we can't set the mtu, don't error | |
373 | * out, we'll try to muddle along. | |
374 | */ | |
375 | if (ic_dev_mtu != 0) { | |
376 | strcpy(ir.ifr_name, ic_dev->name); | |
377 | ir.ifr_mtu = ic_dev_mtu; | |
378 | if ((err = ic_dev_ioctl(SIOCSIFMTU, &ir)) < 0) | |
379 | printk(KERN_ERR "IP-Config: Unable to set interface mtu to %d (%d).\n", | |
380 | ic_dev_mtu, err); | |
381 | } | |
1da177e4 LT |
382 | return 0; |
383 | } | |
384 | ||
385 | static int __init ic_setup_routes(void) | |
386 | { | |
387 | /* No need to setup device routes, only the default route... */ | |
388 | ||
5a874db4 | 389 | if (ic_gateway != NONE) { |
1da177e4 LT |
390 | struct rtentry rm; |
391 | int err; | |
392 | ||
393 | memset(&rm, 0, sizeof(rm)); | |
394 | if ((ic_gateway ^ ic_myaddr) & ic_netmask) { | |
395 | printk(KERN_ERR "IP-Config: Gateway not on directly connected network.\n"); | |
396 | return -1; | |
397 | } | |
398 | set_sockaddr((struct sockaddr_in *) &rm.rt_dst, 0, 0); | |
399 | set_sockaddr((struct sockaddr_in *) &rm.rt_genmask, 0, 0); | |
400 | set_sockaddr((struct sockaddr_in *) &rm.rt_gateway, ic_gateway, 0); | |
401 | rm.rt_flags = RTF_UP | RTF_GATEWAY; | |
402 | if ((err = ic_route_ioctl(SIOCADDRT, &rm)) < 0) { | |
403 | printk(KERN_ERR "IP-Config: Cannot add default route (%d).\n", err); | |
404 | return -1; | |
405 | } | |
406 | } | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
411 | /* | |
412 | * Fill in default values for all missing parameters. | |
413 | */ | |
414 | ||
415 | static int __init ic_defaults(void) | |
416 | { | |
417 | /* | |
418 | * At this point we have no userspace running so need not | |
419 | * claim locks on system_utsname | |
420 | */ | |
e905a9ed | 421 | |
1da177e4 | 422 | if (!ic_host_name_set) |
673d57e7 | 423 | sprintf(init_utsname()->nodename, "%pI4", &ic_myaddr); |
1da177e4 | 424 | |
5a874db4 | 425 | if (root_server_addr == NONE) |
1da177e4 LT |
426 | root_server_addr = ic_servaddr; |
427 | ||
5a874db4 | 428 | if (ic_netmask == NONE) { |
1da177e4 LT |
429 | if (IN_CLASSA(ntohl(ic_myaddr))) |
430 | ic_netmask = htonl(IN_CLASSA_NET); | |
431 | else if (IN_CLASSB(ntohl(ic_myaddr))) | |
432 | ic_netmask = htonl(IN_CLASSB_NET); | |
433 | else if (IN_CLASSC(ntohl(ic_myaddr))) | |
434 | ic_netmask = htonl(IN_CLASSC_NET); | |
435 | else { | |
673d57e7 HH |
436 | printk(KERN_ERR "IP-Config: Unable to guess netmask for address %pI4\n", |
437 | &ic_myaddr); | |
1da177e4 LT |
438 | return -1; |
439 | } | |
673d57e7 | 440 | printk("IP-Config: Guessing netmask %pI4\n", &ic_netmask); |
1da177e4 LT |
441 | } |
442 | ||
443 | return 0; | |
444 | } | |
445 | ||
446 | /* | |
447 | * RARP support. | |
448 | */ | |
449 | ||
450 | #ifdef IPCONFIG_RARP | |
451 | ||
f2ccd8fa | 452 | static int ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev); |
1da177e4 LT |
453 | |
454 | static struct packet_type rarp_packet_type __initdata = { | |
09640e63 | 455 | .type = cpu_to_be16(ETH_P_RARP), |
1da177e4 LT |
456 | .func = ic_rarp_recv, |
457 | }; | |
458 | ||
45e741b8 | 459 | static inline void __init ic_rarp_init(void) |
1da177e4 LT |
460 | { |
461 | dev_add_pack(&rarp_packet_type); | |
462 | } | |
463 | ||
45e741b8 | 464 | static inline void __init ic_rarp_cleanup(void) |
1da177e4 LT |
465 | { |
466 | dev_remove_pack(&rarp_packet_type); | |
467 | } | |
468 | ||
469 | /* | |
470 | * Process received RARP packet. | |
471 | */ | |
472 | static int __init | |
f2ccd8fa | 473 | ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) |
1da177e4 LT |
474 | { |
475 | struct arphdr *rarp; | |
476 | unsigned char *rarp_ptr; | |
5a874db4 | 477 | __be32 sip, tip; |
1da177e4 LT |
478 | unsigned char *sha, *tha; /* s for "source", t for "target" */ |
479 | struct ic_device *d; | |
480 | ||
721499e8 | 481 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
482 | goto drop; |
483 | ||
1da177e4 LT |
484 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) |
485 | return NET_RX_DROP; | |
486 | ||
487 | if (!pskb_may_pull(skb, sizeof(struct arphdr))) | |
488 | goto drop; | |
489 | ||
490 | /* Basic sanity checks can be done without the lock. */ | |
9c70220b | 491 | rarp = (struct arphdr *)skb_transport_header(skb); |
1da177e4 LT |
492 | |
493 | /* If this test doesn't pass, it's not IP, or we should | |
494 | * ignore it anyway. | |
495 | */ | |
496 | if (rarp->ar_hln != dev->addr_len || dev->type != ntohs(rarp->ar_hrd)) | |
497 | goto drop; | |
498 | ||
499 | /* If it's not a RARP reply, delete it. */ | |
500 | if (rarp->ar_op != htons(ARPOP_RREPLY)) | |
501 | goto drop; | |
502 | ||
503 | /* If it's not Ethernet, delete it. */ | |
504 | if (rarp->ar_pro != htons(ETH_P_IP)) | |
505 | goto drop; | |
506 | ||
988b7050 | 507 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) |
1da177e4 LT |
508 | goto drop; |
509 | ||
510 | /* OK, it is all there and looks valid, process... */ | |
9c70220b | 511 | rarp = (struct arphdr *)skb_transport_header(skb); |
1da177e4 LT |
512 | rarp_ptr = (unsigned char *) (rarp + 1); |
513 | ||
514 | /* One reply at a time, please. */ | |
515 | spin_lock(&ic_recv_lock); | |
516 | ||
517 | /* If we already have a reply, just drop the packet */ | |
518 | if (ic_got_reply) | |
519 | goto drop_unlock; | |
520 | ||
521 | /* Find the ic_device that the packet arrived on */ | |
522 | d = ic_first_dev; | |
523 | while (d && d->dev != dev) | |
524 | d = d->next; | |
525 | if (!d) | |
526 | goto drop_unlock; /* should never happen */ | |
527 | ||
528 | /* Extract variable-width fields */ | |
529 | sha = rarp_ptr; | |
530 | rarp_ptr += dev->addr_len; | |
531 | memcpy(&sip, rarp_ptr, 4); | |
532 | rarp_ptr += 4; | |
533 | tha = rarp_ptr; | |
534 | rarp_ptr += dev->addr_len; | |
535 | memcpy(&tip, rarp_ptr, 4); | |
536 | ||
537 | /* Discard packets which are not meant for us. */ | |
538 | if (memcmp(tha, dev->dev_addr, dev->addr_len)) | |
539 | goto drop_unlock; | |
540 | ||
541 | /* Discard packets which are not from specified server. */ | |
5a874db4 | 542 | if (ic_servaddr != NONE && ic_servaddr != sip) |
1da177e4 LT |
543 | goto drop_unlock; |
544 | ||
545 | /* We have a winner! */ | |
546 | ic_dev = dev; | |
5a874db4 | 547 | if (ic_myaddr == NONE) |
1da177e4 LT |
548 | ic_myaddr = tip; |
549 | ic_servaddr = sip; | |
550 | ic_got_reply = IC_RARP; | |
551 | ||
552 | drop_unlock: | |
553 | /* Show's over. Nothing to see here. */ | |
554 | spin_unlock(&ic_recv_lock); | |
555 | ||
556 | drop: | |
557 | /* Throw the packet out. */ | |
558 | kfree_skb(skb); | |
559 | return 0; | |
560 | } | |
561 | ||
562 | ||
563 | /* | |
564 | * Send RARP request packet over a single interface. | |
565 | */ | |
566 | static void __init ic_rarp_send_if(struct ic_device *d) | |
567 | { | |
568 | struct net_device *dev = d->dev; | |
569 | arp_send(ARPOP_RREQUEST, ETH_P_RARP, 0, dev, 0, NULL, | |
570 | dev->dev_addr, dev->dev_addr); | |
571 | } | |
572 | #endif | |
573 | ||
574 | /* | |
575 | * DHCP/BOOTP support. | |
576 | */ | |
577 | ||
578 | #ifdef IPCONFIG_BOOTP | |
579 | ||
580 | struct bootp_pkt { /* BOOTP packet format */ | |
581 | struct iphdr iph; /* IP header */ | |
582 | struct udphdr udph; /* UDP header */ | |
583 | u8 op; /* 1=request, 2=reply */ | |
584 | u8 htype; /* HW address type */ | |
585 | u8 hlen; /* HW address length */ | |
586 | u8 hops; /* Used only by gateways */ | |
5a874db4 AV |
587 | __be32 xid; /* Transaction ID */ |
588 | __be16 secs; /* Seconds since we started */ | |
589 | __be16 flags; /* Just what it says */ | |
590 | __be32 client_ip; /* Client's IP address if known */ | |
591 | __be32 your_ip; /* Assigned IP address */ | |
592 | __be32 server_ip; /* (Next, e.g. NFS) Server's IP address */ | |
593 | __be32 relay_ip; /* IP address of BOOTP relay */ | |
1da177e4 LT |
594 | u8 hw_addr[16]; /* Client's HW address */ |
595 | u8 serv_name[64]; /* Server host name */ | |
596 | u8 boot_file[128]; /* Name of boot file */ | |
597 | u8 exten[312]; /* DHCP options / BOOTP vendor extensions */ | |
598 | }; | |
599 | ||
600 | /* packet ops */ | |
601 | #define BOOTP_REQUEST 1 | |
602 | #define BOOTP_REPLY 2 | |
603 | ||
604 | /* DHCP message types */ | |
605 | #define DHCPDISCOVER 1 | |
606 | #define DHCPOFFER 2 | |
607 | #define DHCPREQUEST 3 | |
608 | #define DHCPDECLINE 4 | |
609 | #define DHCPACK 5 | |
610 | #define DHCPNAK 6 | |
611 | #define DHCPRELEASE 7 | |
612 | #define DHCPINFORM 8 | |
613 | ||
f2ccd8fa | 614 | static int ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev); |
1da177e4 LT |
615 | |
616 | static struct packet_type bootp_packet_type __initdata = { | |
09640e63 | 617 | .type = cpu_to_be16(ETH_P_IP), |
1da177e4 LT |
618 | .func = ic_bootp_recv, |
619 | }; | |
620 | ||
621 | ||
622 | /* | |
623 | * Initialize DHCP/BOOTP extension fields in the request. | |
624 | */ | |
625 | ||
626 | static const u8 ic_bootp_cookie[4] = { 99, 130, 83, 99 }; | |
627 | ||
628 | #ifdef IPCONFIG_DHCP | |
629 | ||
630 | static void __init | |
631 | ic_dhcp_init_options(u8 *options) | |
632 | { | |
5a874db4 | 633 | u8 mt = ((ic_servaddr == NONE) |
1da177e4 LT |
634 | ? DHCPDISCOVER : DHCPREQUEST); |
635 | u8 *e = options; | |
62013dbb | 636 | int len; |
1da177e4 LT |
637 | |
638 | #ifdef IPCONFIG_DEBUG | |
639 | printk("DHCP: Sending message type %d\n", mt); | |
640 | #endif | |
641 | ||
642 | memcpy(e, ic_bootp_cookie, 4); /* RFC1048 Magic Cookie */ | |
643 | e += 4; | |
644 | ||
645 | *e++ = 53; /* DHCP message type */ | |
646 | *e++ = 1; | |
647 | *e++ = mt; | |
648 | ||
649 | if (mt == DHCPREQUEST) { | |
650 | *e++ = 54; /* Server ID (IP address) */ | |
651 | *e++ = 4; | |
652 | memcpy(e, &ic_servaddr, 4); | |
653 | e += 4; | |
654 | ||
655 | *e++ = 50; /* Requested IP address */ | |
656 | *e++ = 4; | |
657 | memcpy(e, &ic_myaddr, 4); | |
658 | e += 4; | |
659 | } | |
660 | ||
661 | /* always? */ | |
662 | { | |
663 | static const u8 ic_req_params[] = { | |
664 | 1, /* Subnet mask */ | |
665 | 3, /* Default gateway */ | |
666 | 6, /* DNS server */ | |
667 | 12, /* Host name */ | |
668 | 15, /* Domain name */ | |
669 | 17, /* Boot path */ | |
9643f455 | 670 | 26, /* MTU */ |
1da177e4 LT |
671 | 40, /* NIS domain name */ |
672 | }; | |
673 | ||
674 | *e++ = 55; /* Parameter request list */ | |
675 | *e++ = sizeof(ic_req_params); | |
676 | memcpy(e, ic_req_params, sizeof(ic_req_params)); | |
677 | e += sizeof(ic_req_params); | |
62013dbb | 678 | |
130c0f47 WF |
679 | if (ic_host_name_set) { |
680 | *e++ = 12; /* host-name */ | |
681 | len = strlen(utsname()->nodename); | |
682 | *e++ = len; | |
683 | memcpy(e, utsname()->nodename, len); | |
684 | e += len; | |
685 | } | |
62013dbb RJ |
686 | if (*vendor_class_identifier) { |
687 | printk(KERN_INFO "DHCP: sending class identifier \"%s\"\n", | |
688 | vendor_class_identifier); | |
689 | *e++ = 60; /* Class-identifier */ | |
690 | len = strlen(vendor_class_identifier); | |
691 | *e++ = len; | |
692 | memcpy(e, vendor_class_identifier, len); | |
693 | e += len; | |
694 | } | |
1da177e4 LT |
695 | } |
696 | ||
697 | *e++ = 255; /* End of the list */ | |
698 | } | |
699 | ||
700 | #endif /* IPCONFIG_DHCP */ | |
701 | ||
702 | static void __init ic_bootp_init_ext(u8 *e) | |
703 | { | |
704 | memcpy(e, ic_bootp_cookie, 4); /* RFC1048 Magic Cookie */ | |
705 | e += 4; | |
706 | *e++ = 1; /* Subnet mask request */ | |
707 | *e++ = 4; | |
708 | e += 4; | |
709 | *e++ = 3; /* Default gateway request */ | |
710 | *e++ = 4; | |
711 | e += 4; | |
712 | *e++ = 5; /* Name server request */ | |
713 | *e++ = 8; | |
714 | e += 8; | |
715 | *e++ = 12; /* Host name request */ | |
716 | *e++ = 32; | |
717 | e += 32; | |
718 | *e++ = 40; /* NIS Domain name request */ | |
719 | *e++ = 32; | |
720 | e += 32; | |
721 | *e++ = 17; /* Boot path */ | |
722 | *e++ = 40; | |
723 | e += 40; | |
724 | ||
e905a9ed | 725 | *e++ = 57; /* set extension buffer size for reply */ |
1da177e4 | 726 | *e++ = 2; |
e905a9ed | 727 | *e++ = 1; /* 128+236+8+20+14, see dhcpd sources */ |
1da177e4 LT |
728 | *e++ = 150; |
729 | ||
730 | *e++ = 255; /* End of the list */ | |
731 | } | |
732 | ||
733 | ||
734 | /* | |
735 | * Initialize the DHCP/BOOTP mechanism. | |
736 | */ | |
45e741b8 | 737 | static inline void __init ic_bootp_init(void) |
1da177e4 LT |
738 | { |
739 | int i; | |
740 | ||
741 | for (i = 0; i < CONF_NAMESERVERS_MAX; i++) | |
5a874db4 | 742 | ic_nameservers[i] = NONE; |
1da177e4 LT |
743 | |
744 | dev_add_pack(&bootp_packet_type); | |
745 | } | |
746 | ||
747 | ||
748 | /* | |
749 | * DHCP/BOOTP cleanup. | |
750 | */ | |
45e741b8 | 751 | static inline void __init ic_bootp_cleanup(void) |
1da177e4 LT |
752 | { |
753 | dev_remove_pack(&bootp_packet_type); | |
754 | } | |
755 | ||
756 | ||
757 | /* | |
758 | * Send DHCP/BOOTP request to single interface. | |
759 | */ | |
760 | static void __init ic_bootp_send_if(struct ic_device *d, unsigned long jiffies_diff) | |
761 | { | |
762 | struct net_device *dev = d->dev; | |
763 | struct sk_buff *skb; | |
764 | struct bootp_pkt *b; | |
1da177e4 LT |
765 | struct iphdr *h; |
766 | ||
767 | /* Allocate packet */ | |
f5184d26 JB |
768 | skb = alloc_skb(sizeof(struct bootp_pkt) + LL_ALLOCATED_SPACE(dev) + 15, |
769 | GFP_KERNEL); | |
1da177e4 LT |
770 | if (!skb) |
771 | return; | |
f5184d26 | 772 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); |
1da177e4 LT |
773 | b = (struct bootp_pkt *) skb_put(skb, sizeof(struct bootp_pkt)); |
774 | memset(b, 0, sizeof(struct bootp_pkt)); | |
775 | ||
776 | /* Construct IP header */ | |
04b964db | 777 | skb_reset_network_header(skb); |
eddc9ec5 | 778 | h = ip_hdr(skb); |
1da177e4 LT |
779 | h->version = 4; |
780 | h->ihl = 5; | |
781 | h->tot_len = htons(sizeof(struct bootp_pkt)); | |
782 | h->frag_off = htons(IP_DF); | |
783 | h->ttl = 64; | |
784 | h->protocol = IPPROTO_UDP; | |
5a874db4 | 785 | h->daddr = htonl(INADDR_BROADCAST); |
1da177e4 LT |
786 | h->check = ip_fast_csum((unsigned char *) h, h->ihl); |
787 | ||
788 | /* Construct UDP header */ | |
789 | b->udph.source = htons(68); | |
790 | b->udph.dest = htons(67); | |
791 | b->udph.len = htons(sizeof(struct bootp_pkt) - sizeof(struct iphdr)); | |
792 | /* UDP checksum not calculated -- explicitly allowed in BOOTP RFC */ | |
793 | ||
794 | /* Construct DHCP/BOOTP header */ | |
795 | b->op = BOOTP_REQUEST; | |
796 | if (dev->type < 256) /* check for false types */ | |
797 | b->htype = dev->type; | |
798 | else if (dev->type == ARPHRD_IEEE802_TR) /* fix for token ring */ | |
799 | b->htype = ARPHRD_IEEE802; | |
800 | else if (dev->type == ARPHRD_FDDI) | |
801 | b->htype = ARPHRD_ETHER; | |
802 | else { | |
803 | printk("Unknown ARP type 0x%04x for device %s\n", dev->type, dev->name); | |
804 | b->htype = dev->type; /* can cause undefined behavior */ | |
805 | } | |
dea75bdf SH |
806 | |
807 | /* server_ip and your_ip address are both already zero per RFC2131 */ | |
1da177e4 | 808 | b->hlen = dev->addr_len; |
1da177e4 LT |
809 | memcpy(b->hw_addr, dev->dev_addr, dev->addr_len); |
810 | b->secs = htons(jiffies_diff / HZ); | |
811 | b->xid = d->xid; | |
812 | ||
813 | /* add DHCP options or BOOTP extensions */ | |
814 | #ifdef IPCONFIG_DHCP | |
815 | if (ic_proto_enabled & IC_USE_DHCP) | |
816 | ic_dhcp_init_options(b->exten); | |
817 | else | |
818 | #endif | |
819 | ic_bootp_init_ext(b->exten); | |
820 | ||
821 | /* Chain packet down the line... */ | |
822 | skb->dev = dev; | |
823 | skb->protocol = htons(ETH_P_IP); | |
0c4e8581 | 824 | if (dev_hard_header(skb, dev, ntohs(skb->protocol), |
ad79eefc RL |
825 | dev->broadcast, dev->dev_addr, skb->len) < 0) { |
826 | kfree_skb(skb); | |
827 | printk("E"); | |
828 | return; | |
829 | } | |
830 | ||
831 | if (dev_queue_xmit(skb) < 0) | |
1da177e4 LT |
832 | printk("E"); |
833 | } | |
834 | ||
835 | ||
836 | /* | |
837 | * Copy BOOTP-supplied string if not already set. | |
838 | */ | |
839 | static int __init ic_bootp_string(char *dest, char *src, int len, int max) | |
840 | { | |
841 | if (!len) | |
842 | return 0; | |
843 | if (len > max-1) | |
844 | len = max-1; | |
845 | memcpy(dest, src, len); | |
846 | dest[len] = '\0'; | |
847 | return 1; | |
848 | } | |
849 | ||
850 | ||
851 | /* | |
852 | * Process BOOTP extensions. | |
853 | */ | |
854 | static void __init ic_do_bootp_ext(u8 *ext) | |
855 | { | |
856 | u8 servers; | |
857 | int i; | |
9643f455 | 858 | u16 mtu; |
1da177e4 LT |
859 | |
860 | #ifdef IPCONFIG_DEBUG | |
861 | u8 *c; | |
862 | ||
863 | printk("DHCP/BOOTP: Got extension %d:",*ext); | |
132adf54 | 864 | for (c=ext+2; c<ext+2+ext[1]; c++) |
1da177e4 LT |
865 | printk(" %02x", *c); |
866 | printk("\n"); | |
867 | #endif | |
868 | ||
869 | switch (*ext++) { | |
1d67a516 JP |
870 | case 1: /* Subnet mask */ |
871 | if (ic_netmask == NONE) | |
872 | memcpy(&ic_netmask, ext+1, 4); | |
873 | break; | |
874 | case 3: /* Default gateway */ | |
875 | if (ic_gateway == NONE) | |
876 | memcpy(&ic_gateway, ext+1, 4); | |
877 | break; | |
878 | case 6: /* DNS server */ | |
879 | servers= *ext/4; | |
880 | if (servers > CONF_NAMESERVERS_MAX) | |
881 | servers = CONF_NAMESERVERS_MAX; | |
882 | for (i = 0; i < servers; i++) { | |
883 | if (ic_nameservers[i] == NONE) | |
884 | memcpy(&ic_nameservers[i], ext+1+4*i, 4); | |
885 | } | |
886 | break; | |
887 | case 12: /* Host name */ | |
888 | ic_bootp_string(utsname()->nodename, ext+1, *ext, | |
889 | __NEW_UTS_LEN); | |
890 | ic_host_name_set = 1; | |
891 | break; | |
892 | case 15: /* Domain name (DNS) */ | |
893 | ic_bootp_string(ic_domain, ext+1, *ext, sizeof(ic_domain)); | |
894 | break; | |
895 | case 17: /* Root path */ | |
896 | if (!root_server_path[0]) | |
897 | ic_bootp_string(root_server_path, ext+1, *ext, | |
898 | sizeof(root_server_path)); | |
899 | break; | |
900 | case 26: /* Interface MTU */ | |
901 | memcpy(&mtu, ext+1, sizeof(mtu)); | |
902 | ic_dev_mtu = ntohs(mtu); | |
903 | break; | |
904 | case 40: /* NIS Domain name (_not_ DNS) */ | |
905 | ic_bootp_string(utsname()->domainname, ext+1, *ext, | |
906 | __NEW_UTS_LEN); | |
907 | break; | |
1da177e4 LT |
908 | } |
909 | } | |
910 | ||
911 | ||
912 | /* | |
913 | * Receive BOOTP reply. | |
914 | */ | |
f2ccd8fa | 915 | 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 |
916 | { |
917 | struct bootp_pkt *b; | |
918 | struct iphdr *h; | |
919 | struct ic_device *d; | |
920 | int len, ext_len; | |
921 | ||
721499e8 | 922 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
923 | goto drop; |
924 | ||
1da177e4 LT |
925 | /* Perform verifications before taking the lock. */ |
926 | if (skb->pkt_type == PACKET_OTHERHOST) | |
927 | goto drop; | |
928 | ||
929 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) | |
930 | return NET_RX_DROP; | |
931 | ||
932 | if (!pskb_may_pull(skb, | |
933 | sizeof(struct iphdr) + | |
934 | sizeof(struct udphdr))) | |
935 | goto drop; | |
936 | ||
eddc9ec5 | 937 | b = (struct bootp_pkt *)skb_network_header(skb); |
1da177e4 LT |
938 | h = &b->iph; |
939 | ||
940 | if (h->ihl != 5 || h->version != 4 || h->protocol != IPPROTO_UDP) | |
941 | goto drop; | |
942 | ||
943 | /* Fragments are not supported */ | |
56f8a75c | 944 | if (ip_is_fragment(h)) { |
1da177e4 LT |
945 | if (net_ratelimit()) |
946 | printk(KERN_ERR "DHCP/BOOTP: Ignoring fragmented " | |
947 | "reply.\n"); | |
948 | goto drop; | |
949 | } | |
950 | ||
951 | if (skb->len < ntohs(h->tot_len)) | |
952 | goto drop; | |
953 | ||
954 | if (ip_fast_csum((char *) h, h->ihl)) | |
955 | goto drop; | |
956 | ||
957 | if (b->udph.source != htons(67) || b->udph.dest != htons(68)) | |
958 | goto drop; | |
959 | ||
960 | if (ntohs(h->tot_len) < ntohs(b->udph.len) + sizeof(struct iphdr)) | |
961 | goto drop; | |
962 | ||
963 | len = ntohs(b->udph.len) - sizeof(struct udphdr); | |
964 | ext_len = len - (sizeof(*b) - | |
965 | sizeof(struct iphdr) - | |
966 | sizeof(struct udphdr) - | |
967 | sizeof(b->exten)); | |
968 | if (ext_len < 0) | |
969 | goto drop; | |
970 | ||
971 | /* Ok the front looks good, make sure we can get at the rest. */ | |
972 | if (!pskb_may_pull(skb, skb->len)) | |
973 | goto drop; | |
974 | ||
eddc9ec5 | 975 | b = (struct bootp_pkt *)skb_network_header(skb); |
1da177e4 LT |
976 | h = &b->iph; |
977 | ||
978 | /* One reply at a time, please. */ | |
979 | spin_lock(&ic_recv_lock); | |
980 | ||
981 | /* If we already have a reply, just drop the packet */ | |
982 | if (ic_got_reply) | |
983 | goto drop_unlock; | |
984 | ||
985 | /* Find the ic_device that the packet arrived on */ | |
986 | d = ic_first_dev; | |
987 | while (d && d->dev != dev) | |
988 | d = d->next; | |
989 | if (!d) | |
990 | goto drop_unlock; /* should never happen */ | |
991 | ||
992 | /* Is it a reply to our BOOTP request? */ | |
993 | if (b->op != BOOTP_REPLY || | |
994 | b->xid != d->xid) { | |
995 | if (net_ratelimit()) | |
996 | printk(KERN_ERR "DHCP/BOOTP: Reply not for us, " | |
997 | "op[%x] xid[%x]\n", | |
998 | b->op, b->xid); | |
999 | goto drop_unlock; | |
1000 | } | |
1001 | ||
2513dfb8 CF |
1002 | /* Is it a reply for the device we are configuring? */ |
1003 | if (b->xid != ic_dev_xid) { | |
1004 | if (net_ratelimit()) | |
b1383380 | 1005 | printk(KERN_ERR "DHCP/BOOTP: Ignoring delayed packet\n"); |
2513dfb8 CF |
1006 | goto drop_unlock; |
1007 | } | |
1008 | ||
1da177e4 LT |
1009 | /* Parse extensions */ |
1010 | if (ext_len >= 4 && | |
1011 | !memcmp(b->exten, ic_bootp_cookie, 4)) { /* Check magic cookie */ | |
e905a9ed | 1012 | u8 *end = (u8 *) b + ntohs(b->iph.tot_len); |
1da177e4 LT |
1013 | u8 *ext; |
1014 | ||
1015 | #ifdef IPCONFIG_DHCP | |
1016 | if (ic_proto_enabled & IC_USE_DHCP) { | |
5a874db4 | 1017 | __be32 server_id = NONE; |
1da177e4 LT |
1018 | int mt = 0; |
1019 | ||
1020 | ext = &b->exten[4]; | |
1021 | while (ext < end && *ext != 0xff) { | |
1022 | u8 *opt = ext++; | |
1023 | if (*opt == 0) /* Padding */ | |
1024 | continue; | |
1025 | ext += *ext + 1; | |
1026 | if (ext >= end) | |
1027 | break; | |
1028 | switch (*opt) { | |
1029 | case 53: /* Message type */ | |
1030 | if (opt[1]) | |
1031 | mt = opt[2]; | |
1032 | break; | |
1033 | case 54: /* Server ID (IP address) */ | |
1034 | if (opt[1] >= 4) | |
1035 | memcpy(&server_id, opt + 2, 4); | |
1036 | break; | |
3ff50b79 | 1037 | } |
1da177e4 LT |
1038 | } |
1039 | ||
1040 | #ifdef IPCONFIG_DEBUG | |
1041 | printk("DHCP: Got message type %d\n", mt); | |
1042 | #endif | |
1043 | ||
1044 | switch (mt) { | |
1045 | case DHCPOFFER: | |
1046 | /* While in the process of accepting one offer, | |
1047 | * ignore all others. | |
1048 | */ | |
5a874db4 | 1049 | if (ic_myaddr != NONE) |
1da177e4 LT |
1050 | goto drop_unlock; |
1051 | ||
1052 | /* Let's accept that offer. */ | |
1053 | ic_myaddr = b->your_ip; | |
1054 | ic_servaddr = server_id; | |
1055 | #ifdef IPCONFIG_DEBUG | |
673d57e7 HH |
1056 | printk("DHCP: Offered address %pI4 by server %pI4\n", |
1057 | &ic_myaddr, &ic_servaddr); | |
1da177e4 LT |
1058 | #endif |
1059 | /* The DHCP indicated server address takes | |
1060 | * precedence over the bootp header one if | |
1061 | * they are different. | |
1062 | */ | |
5a874db4 | 1063 | if ((server_id != NONE) && |
1da177e4 LT |
1064 | (b->server_ip != server_id)) |
1065 | b->server_ip = ic_servaddr; | |
1066 | break; | |
1067 | ||
1068 | case DHCPACK: | |
1069 | if (memcmp(dev->dev_addr, b->hw_addr, dev->addr_len) != 0) | |
1070 | goto drop_unlock; | |
1071 | ||
1072 | /* Yeah! */ | |
1073 | break; | |
1074 | ||
1075 | default: | |
1076 | /* Urque. Forget it*/ | |
5a874db4 AV |
1077 | ic_myaddr = NONE; |
1078 | ic_servaddr = NONE; | |
1da177e4 | 1079 | goto drop_unlock; |
3ff50b79 | 1080 | } |
1da177e4 LT |
1081 | |
1082 | ic_dhcp_msgtype = mt; | |
1083 | ||
1084 | } | |
1085 | #endif /* IPCONFIG_DHCP */ | |
1086 | ||
1087 | ext = &b->exten[4]; | |
1088 | while (ext < end && *ext != 0xff) { | |
1089 | u8 *opt = ext++; | |
1090 | if (*opt == 0) /* Padding */ | |
1091 | continue; | |
1092 | ext += *ext + 1; | |
1093 | if (ext < end) | |
1094 | ic_do_bootp_ext(opt); | |
1095 | } | |
1096 | } | |
1097 | ||
1098 | /* We have a winner! */ | |
1099 | ic_dev = dev; | |
1100 | ic_myaddr = b->your_ip; | |
1101 | ic_servaddr = b->server_ip; | |
5a874db4 | 1102 | if (ic_gateway == NONE && b->relay_ip) |
1da177e4 | 1103 | ic_gateway = b->relay_ip; |
5a874db4 | 1104 | if (ic_nameservers[0] == NONE) |
1da177e4 LT |
1105 | ic_nameservers[0] = ic_servaddr; |
1106 | ic_got_reply = IC_BOOTP; | |
1107 | ||
1108 | drop_unlock: | |
1109 | /* Show's over. Nothing to see here. */ | |
1110 | spin_unlock(&ic_recv_lock); | |
1111 | ||
1112 | drop: | |
1113 | /* Throw the packet out. */ | |
1114 | kfree_skb(skb); | |
1115 | ||
1116 | return 0; | |
e905a9ed | 1117 | } |
1da177e4 LT |
1118 | |
1119 | ||
1120 | #endif | |
1121 | ||
1122 | ||
1123 | /* | |
1124 | * Dynamic IP configuration -- DHCP, BOOTP, RARP. | |
1125 | */ | |
1126 | ||
1127 | #ifdef IPCONFIG_DYNAMIC | |
1128 | ||
1129 | static int __init ic_dynamic(void) | |
1130 | { | |
1131 | int retries; | |
1132 | struct ic_device *d; | |
1133 | unsigned long start_jiffies, timeout, jiff; | |
1134 | int do_bootp = ic_proto_have_if & IC_BOOTP; | |
1135 | int do_rarp = ic_proto_have_if & IC_RARP; | |
1136 | ||
1137 | /* | |
1138 | * If none of DHCP/BOOTP/RARP was selected, return with an error. | |
1139 | * This routine gets only called when some pieces of information | |
1140 | * are missing, and without DHCP/BOOTP/RARP we are unable to get it. | |
1141 | */ | |
1142 | if (!ic_proto_enabled) { | |
1143 | printk(KERN_ERR "IP-Config: Incomplete network configuration information.\n"); | |
1144 | return -1; | |
1145 | } | |
1146 | ||
1147 | #ifdef IPCONFIG_BOOTP | |
1148 | if ((ic_proto_enabled ^ ic_proto_have_if) & IC_BOOTP) | |
1149 | printk(KERN_ERR "DHCP/BOOTP: No suitable device found.\n"); | |
1150 | #endif | |
1151 | #ifdef IPCONFIG_RARP | |
1152 | if ((ic_proto_enabled ^ ic_proto_have_if) & IC_RARP) | |
1153 | printk(KERN_ERR "RARP: No suitable device found.\n"); | |
1154 | #endif | |
1155 | ||
1156 | if (!ic_proto_have_if) | |
1157 | /* Error message already printed */ | |
1158 | return -1; | |
1159 | ||
1160 | /* | |
1161 | * Setup protocols | |
1162 | */ | |
1163 | #ifdef IPCONFIG_BOOTP | |
1164 | if (do_bootp) | |
1165 | ic_bootp_init(); | |
1166 | #endif | |
1167 | #ifdef IPCONFIG_RARP | |
1168 | if (do_rarp) | |
1169 | ic_rarp_init(); | |
1170 | #endif | |
1171 | ||
1172 | /* | |
1173 | * Send requests and wait, until we get an answer. This loop | |
1174 | * seems to be a terrible waste of CPU time, but actually there is | |
1175 | * only one process running at all, so we don't need to use any | |
1176 | * scheduler functions. | |
e905a9ed | 1177 | * [Actually we could now, but the nothing else running note still |
1da177e4 LT |
1178 | * applies.. - AC] |
1179 | */ | |
1180 | printk(KERN_NOTICE "Sending %s%s%s requests .", | |
1181 | do_bootp | |
1182 | ? ((ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP") : "", | |
1183 | (do_bootp && do_rarp) ? " and " : "", | |
1184 | do_rarp ? "RARP" : ""); | |
1185 | ||
1186 | start_jiffies = jiffies; | |
1187 | d = ic_first_dev; | |
1188 | retries = CONF_SEND_RETRIES; | |
1189 | get_random_bytes(&timeout, sizeof(timeout)); | |
1190 | timeout = CONF_BASE_TIMEOUT + (timeout % (unsigned) CONF_TIMEOUT_RANDOM); | |
132adf54 | 1191 | for (;;) { |
2513dfb8 CF |
1192 | /* Track the device we are configuring */ |
1193 | ic_dev_xid = d->xid; | |
1194 | ||
1da177e4 LT |
1195 | #ifdef IPCONFIG_BOOTP |
1196 | if (do_bootp && (d->able & IC_BOOTP)) | |
1197 | ic_bootp_send_if(d, jiffies - start_jiffies); | |
1198 | #endif | |
1199 | #ifdef IPCONFIG_RARP | |
1200 | if (do_rarp && (d->able & IC_RARP)) | |
1201 | ic_rarp_send_if(d); | |
1202 | #endif | |
1203 | ||
1204 | jiff = jiffies + (d->next ? CONF_INTER_TIMEOUT : timeout); | |
121caf57 NA |
1205 | while (time_before(jiffies, jiff) && !ic_got_reply) |
1206 | schedule_timeout_uninterruptible(1); | |
1da177e4 LT |
1207 | #ifdef IPCONFIG_DHCP |
1208 | /* DHCP isn't done until we get a DHCPACK. */ | |
9d4fb27d JP |
1209 | if ((ic_got_reply & IC_BOOTP) && |
1210 | (ic_proto_enabled & IC_USE_DHCP) && | |
1211 | ic_dhcp_msgtype != DHCPACK) { | |
1da177e4 | 1212 | ic_got_reply = 0; |
a40c9f88 | 1213 | printk(KERN_CONT ","); |
1da177e4 LT |
1214 | continue; |
1215 | } | |
1216 | #endif /* IPCONFIG_DHCP */ | |
1217 | ||
1218 | if (ic_got_reply) { | |
a40c9f88 | 1219 | printk(KERN_CONT " OK\n"); |
1da177e4 LT |
1220 | break; |
1221 | } | |
1222 | ||
1223 | if ((d = d->next)) | |
1224 | continue; | |
1225 | ||
1226 | if (! --retries) { | |
a40c9f88 | 1227 | printk(KERN_CONT " timed out!\n"); |
1da177e4 LT |
1228 | break; |
1229 | } | |
1230 | ||
1231 | d = ic_first_dev; | |
1232 | ||
1233 | timeout = timeout CONF_TIMEOUT_MULT; | |
1234 | if (timeout > CONF_TIMEOUT_MAX) | |
1235 | timeout = CONF_TIMEOUT_MAX; | |
1236 | ||
a40c9f88 | 1237 | printk(KERN_CONT "."); |
1da177e4 LT |
1238 | } |
1239 | ||
1240 | #ifdef IPCONFIG_BOOTP | |
1241 | if (do_bootp) | |
1242 | ic_bootp_cleanup(); | |
1243 | #endif | |
1244 | #ifdef IPCONFIG_RARP | |
1245 | if (do_rarp) | |
1246 | ic_rarp_cleanup(); | |
1247 | #endif | |
1248 | ||
7a1af5d7 | 1249 | if (!ic_got_reply) { |
5a874db4 | 1250 | ic_myaddr = NONE; |
1da177e4 | 1251 | return -1; |
7a1af5d7 | 1252 | } |
1da177e4 | 1253 | |
673d57e7 | 1254 | printk("IP-Config: Got %s answer from %pI4, ", |
e905a9ed | 1255 | ((ic_got_reply & IC_RARP) ? "RARP" |
1da177e4 | 1256 | : (ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP"), |
673d57e7 | 1257 | &ic_servaddr); |
a40c9f88 | 1258 | printk(KERN_CONT "my address is %pI4\n", &ic_myaddr); |
1da177e4 LT |
1259 | |
1260 | return 0; | |
1261 | } | |
1262 | ||
1263 | #endif /* IPCONFIG_DYNAMIC */ | |
1264 | ||
1265 | #ifdef CONFIG_PROC_FS | |
1266 | ||
1267 | static int pnp_seq_show(struct seq_file *seq, void *v) | |
1268 | { | |
1269 | int i; | |
1270 | ||
1271 | if (ic_proto_used & IC_PROTO) | |
1272 | seq_printf(seq, "#PROTO: %s\n", | |
1273 | (ic_proto_used & IC_RARP) ? "RARP" | |
1274 | : (ic_proto_used & IC_USE_DHCP) ? "DHCP" : "BOOTP"); | |
1275 | else | |
1276 | seq_puts(seq, "#MANUAL\n"); | |
1277 | ||
1278 | if (ic_domain[0]) | |
1279 | seq_printf(seq, | |
1280 | "domain %s\n", ic_domain); | |
1281 | for (i = 0; i < CONF_NAMESERVERS_MAX; i++) { | |
5a874db4 | 1282 | if (ic_nameservers[i] != NONE) |
673d57e7 HH |
1283 | seq_printf(seq, "nameserver %pI4\n", |
1284 | &ic_nameservers[i]); | |
1da177e4 | 1285 | } |
5a874db4 | 1286 | if (ic_servaddr != NONE) |
673d57e7 HH |
1287 | seq_printf(seq, "bootserver %pI4\n", |
1288 | &ic_servaddr); | |
1da177e4 LT |
1289 | return 0; |
1290 | } | |
1291 | ||
1292 | static int pnp_seq_open(struct inode *indoe, struct file *file) | |
1293 | { | |
1294 | return single_open(file, pnp_seq_show, NULL); | |
1295 | } | |
1296 | ||
9a32144e | 1297 | static const struct file_operations pnp_seq_fops = { |
1da177e4 LT |
1298 | .owner = THIS_MODULE, |
1299 | .open = pnp_seq_open, | |
1300 | .read = seq_read, | |
1301 | .llseek = seq_lseek, | |
1302 | .release = single_release, | |
1303 | }; | |
1304 | #endif /* CONFIG_PROC_FS */ | |
1305 | ||
1306 | /* | |
1307 | * Extract IP address from the parameter string if needed. Note that we | |
1308 | * need to have root_server_addr set _before_ IPConfig gets called as it | |
1309 | * can override it. | |
1310 | */ | |
5a874db4 | 1311 | __be32 __init root_nfs_parse_addr(char *name) |
1da177e4 | 1312 | { |
5a874db4 | 1313 | __be32 addr; |
1da177e4 LT |
1314 | int octets = 0; |
1315 | char *cp, *cq; | |
1316 | ||
1317 | cp = cq = name; | |
1318 | while (octets < 4) { | |
1319 | while (*cp >= '0' && *cp <= '9') | |
1320 | cp++; | |
1321 | if (cp == cq || cp - cq > 3) | |
1322 | break; | |
1323 | if (*cp == '.' || octets == 3) | |
1324 | octets++; | |
1325 | if (octets < 4) | |
1326 | cp++; | |
1327 | cq = cp; | |
1328 | } | |
1329 | if (octets == 4 && (*cp == ':' || *cp == '\0')) { | |
1330 | if (*cp == ':') | |
1331 | *cp++ = '\0'; | |
1332 | addr = in_aton(name); | |
1333 | memmove(name, cp, strlen(cp) + 1); | |
1334 | } else | |
5a874db4 | 1335 | addr = NONE; |
1da177e4 LT |
1336 | |
1337 | return addr; | |
1338 | } | |
1339 | ||
964ad81c DM |
1340 | #define DEVICE_WAIT_MAX 12 /* 12 seconds */ |
1341 | ||
1342 | static int __init wait_for_devices(void) | |
1343 | { | |
1344 | int i; | |
1345 | ||
964ad81c DM |
1346 | for (i = 0; i < DEVICE_WAIT_MAX; i++) { |
1347 | struct net_device *dev; | |
1348 | int found = 0; | |
1349 | ||
1350 | rtnl_lock(); | |
1351 | for_each_netdev(&init_net, dev) { | |
3fb72f1e | 1352 | if (ic_is_init_dev(dev)) { |
964ad81c DM |
1353 | found = 1; |
1354 | break; | |
1355 | } | |
1356 | } | |
1357 | rtnl_unlock(); | |
1358 | if (found) | |
1359 | return 0; | |
1360 | ssleep(1); | |
1361 | } | |
1362 | return -ENODEV; | |
1363 | } | |
1364 | ||
1da177e4 LT |
1365 | /* |
1366 | * IP Autoconfig dispatcher. | |
1367 | */ | |
1368 | ||
1369 | static int __init ip_auto_config(void) | |
1370 | { | |
5a874db4 | 1371 | __be32 addr; |
9d8dba6c BZ |
1372 | #ifdef IPCONFIG_DYNAMIC |
1373 | int retries = CONF_OPEN_RETRIES; | |
1374 | #endif | |
964ad81c | 1375 | int err; |
1da177e4 LT |
1376 | |
1377 | #ifdef CONFIG_PROC_FS | |
457c4cbc | 1378 | proc_net_fops_create(&init_net, "pnp", S_IRUGO, &pnp_seq_fops); |
1da177e4 LT |
1379 | #endif /* CONFIG_PROC_FS */ |
1380 | ||
1381 | if (!ic_enable) | |
1382 | return 0; | |
1383 | ||
1384 | DBG(("IP-Config: Entered.\n")); | |
1385 | #ifdef IPCONFIG_DYNAMIC | |
1386 | try_try_again: | |
1387 | #endif | |
964ad81c DM |
1388 | /* Wait for devices to appear */ |
1389 | err = wait_for_devices(); | |
1390 | if (err) | |
1391 | return err; | |
1da177e4 LT |
1392 | |
1393 | /* Setup all network devices */ | |
964ad81c DM |
1394 | err = ic_open_devs(); |
1395 | if (err) | |
1396 | return err; | |
1da177e4 LT |
1397 | |
1398 | /* Give drivers a chance to settle */ | |
3fb72f1e | 1399 | msleep(CONF_POST_OPEN); |
1da177e4 LT |
1400 | |
1401 | /* | |
1402 | * If the config information is insufficient (e.g., our IP address or | |
1403 | * IP address of the boot server is missing or we have multiple network | |
1404 | * interfaces and no default was set), use BOOTP or RARP to get the | |
1405 | * missing values. | |
1406 | */ | |
5a874db4 | 1407 | if (ic_myaddr == NONE || |
1da177e4 | 1408 | #ifdef CONFIG_ROOT_NFS |
9d4fb27d JP |
1409 | (root_server_addr == NONE && |
1410 | ic_servaddr == NONE && | |
1411 | ROOT_DEV == Root_NFS) || | |
1da177e4 LT |
1412 | #endif |
1413 | ic_first_dev->next) { | |
1414 | #ifdef IPCONFIG_DYNAMIC | |
1da177e4 LT |
1415 | if (ic_dynamic() < 0) { |
1416 | ic_close_devs(); | |
1417 | ||
1418 | /* | |
1419 | * I don't know why, but sometimes the | |
1420 | * eepro100 driver (at least) gets upset and | |
1421 | * doesn't work the first time it's opened. | |
1422 | * But then if you close it and reopen it, it | |
1423 | * works just fine. So we need to try that at | |
1424 | * least once before giving up. | |
1425 | * | |
1426 | * Also, if the root will be NFS-mounted, we | |
1427 | * have nowhere to go if DHCP fails. So we | |
1428 | * just have to keep trying forever. | |
1429 | * | |
1430 | * -- Chip | |
1431 | */ | |
1432 | #ifdef CONFIG_ROOT_NFS | |
1433 | if (ROOT_DEV == Root_NFS) { | |
e905a9ed | 1434 | printk(KERN_ERR |
1da177e4 LT |
1435 | "IP-Config: Retrying forever (NFS root)...\n"); |
1436 | goto try_try_again; | |
1437 | } | |
1438 | #endif | |
1439 | ||
1440 | if (--retries) { | |
e905a9ed | 1441 | printk(KERN_ERR |
1da177e4 LT |
1442 | "IP-Config: Reopening network devices...\n"); |
1443 | goto try_try_again; | |
1444 | } | |
1445 | ||
1446 | /* Oh, well. At least we tried. */ | |
1447 | printk(KERN_ERR "IP-Config: Auto-configuration of network failed.\n"); | |
1448 | return -1; | |
1449 | } | |
1450 | #else /* !DYNAMIC */ | |
1451 | printk(KERN_ERR "IP-Config: Incomplete network configuration information.\n"); | |
1452 | ic_close_devs(); | |
1453 | return -1; | |
1454 | #endif /* IPCONFIG_DYNAMIC */ | |
1455 | } else { | |
1456 | /* Device selected manually or only one device -> use it */ | |
1457 | ic_dev = ic_first_dev->dev; | |
1458 | } | |
1459 | ||
1460 | addr = root_nfs_parse_addr(root_server_path); | |
5a874db4 | 1461 | if (root_server_addr == NONE) |
1da177e4 LT |
1462 | root_server_addr = addr; |
1463 | ||
1464 | /* | |
25985edc | 1465 | * Use defaults wherever applicable. |
1da177e4 LT |
1466 | */ |
1467 | if (ic_defaults() < 0) | |
1468 | return -1; | |
1469 | ||
1470 | /* | |
1471 | * Close all network devices except the device we've | |
1472 | * autoconfigured and set up routes. | |
1473 | */ | |
1474 | ic_close_devs(); | |
1475 | if (ic_setup_if() < 0 || ic_setup_routes() < 0) | |
1476 | return -1; | |
1477 | ||
1478 | /* | |
1479 | * Record which protocol was actually used. | |
1480 | */ | |
1481 | #ifdef IPCONFIG_DYNAMIC | |
1482 | ic_proto_used = ic_got_reply | (ic_proto_enabled & IC_USE_DHCP); | |
1483 | #endif | |
1484 | ||
1485 | #ifndef IPCONFIG_SILENT | |
1486 | /* | |
1487 | * Clue in the operator. | |
1488 | */ | |
a40c9f88 UKK |
1489 | printk("IP-Config: Complete:\n"); |
1490 | printk(" device=%s", ic_dev->name); | |
1491 | printk(KERN_CONT ", addr=%pI4", &ic_myaddr); | |
1492 | printk(KERN_CONT ", mask=%pI4", &ic_netmask); | |
1493 | printk(KERN_CONT ", gw=%pI4", &ic_gateway); | |
1494 | printk(KERN_CONT ",\n host=%s, domain=%s, nis-domain=%s", | |
e9ff3990 | 1495 | utsname()->nodename, ic_domain, utsname()->domainname); |
a40c9f88 UKK |
1496 | printk(KERN_CONT ",\n bootserver=%pI4", &ic_servaddr); |
1497 | printk(KERN_CONT ", rootserver=%pI4", &root_server_addr); | |
1498 | printk(KERN_CONT ", rootpath=%s", root_server_path); | |
9643f455 | 1499 | if (ic_dev_mtu) |
a40c9f88 UKK |
1500 | printk(KERN_CONT ", mtu=%d", ic_dev_mtu); |
1501 | printk(KERN_CONT "\n"); | |
1da177e4 LT |
1502 | #endif /* !SILENT */ |
1503 | ||
1504 | return 0; | |
1505 | } | |
1506 | ||
1507 | late_initcall(ip_auto_config); | |
1508 | ||
1509 | ||
1510 | /* | |
1511 | * Decode any IP configuration options in the "ip=" or "nfsaddrs=" kernel | |
dc7a0816 | 1512 | * command line parameter. See Documentation/filesystems/nfs/nfsroot.txt. |
1da177e4 LT |
1513 | */ |
1514 | static int __init ic_proto_name(char *name) | |
1515 | { | |
1516 | if (!strcmp(name, "on") || !strcmp(name, "any")) { | |
1517 | return 1; | |
1518 | } | |
a6c05c3d | 1519 | if (!strcmp(name, "off") || !strcmp(name, "none")) { |
92ffb85d | 1520 | return 0; |
a6c05c3d | 1521 | } |
1da177e4 LT |
1522 | #ifdef CONFIG_IP_PNP_DHCP |
1523 | else if (!strcmp(name, "dhcp")) { | |
1524 | ic_proto_enabled &= ~IC_RARP; | |
1525 | return 1; | |
1526 | } | |
1527 | #endif | |
1528 | #ifdef CONFIG_IP_PNP_BOOTP | |
1529 | else if (!strcmp(name, "bootp")) { | |
1530 | ic_proto_enabled &= ~(IC_RARP | IC_USE_DHCP); | |
1531 | return 1; | |
1532 | } | |
1533 | #endif | |
1534 | #ifdef CONFIG_IP_PNP_RARP | |
1535 | else if (!strcmp(name, "rarp")) { | |
1536 | ic_proto_enabled &= ~(IC_BOOTP | IC_USE_DHCP); | |
1537 | return 1; | |
1538 | } | |
1539 | #endif | |
1540 | #ifdef IPCONFIG_DYNAMIC | |
1541 | else if (!strcmp(name, "both")) { | |
1542 | ic_proto_enabled &= ~IC_USE_DHCP; /* backward compat :-( */ | |
1543 | return 1; | |
1544 | } | |
1545 | #endif | |
1546 | return 0; | |
1547 | } | |
1548 | ||
1549 | static int __init ip_auto_config_setup(char *addrs) | |
1550 | { | |
1551 | char *cp, *ip, *dp; | |
1552 | int num = 0; | |
1553 | ||
1554 | ic_set_manually = 1; | |
9cecd07c | 1555 | ic_enable = 1; |
1da177e4 | 1556 | |
92ffb85d AW |
1557 | /* |
1558 | * If any dhcp, bootp etc options are set, leave autoconfig on | |
1559 | * and skip the below static IP processing. | |
1560 | */ | |
1da177e4 LT |
1561 | if (ic_proto_name(addrs)) |
1562 | return 1; | |
1563 | ||
92ffb85d AW |
1564 | /* If no static IP is given, turn off autoconfig and bail. */ |
1565 | if (*addrs == 0 || | |
1566 | strcmp(addrs, "off") == 0 || | |
1567 | strcmp(addrs, "none") == 0) { | |
1568 | ic_enable = 0; | |
1569 | return 1; | |
1570 | } | |
1571 | ||
1572 | /* Parse string for static IP assignment. */ | |
1da177e4 LT |
1573 | ip = addrs; |
1574 | while (ip && *ip) { | |
1575 | if ((cp = strchr(ip, ':'))) | |
1576 | *cp++ = '\0'; | |
1577 | if (strlen(ip) > 0) { | |
1578 | DBG(("IP-Config: Parameter #%d: `%s'\n", num, ip)); | |
1579 | switch (num) { | |
1580 | case 0: | |
e6f1cebf | 1581 | if ((ic_myaddr = in_aton(ip)) == ANY) |
5a874db4 | 1582 | ic_myaddr = NONE; |
1da177e4 LT |
1583 | break; |
1584 | case 1: | |
e6f1cebf | 1585 | if ((ic_servaddr = in_aton(ip)) == ANY) |
5a874db4 | 1586 | ic_servaddr = NONE; |
1da177e4 LT |
1587 | break; |
1588 | case 2: | |
e6f1cebf | 1589 | if ((ic_gateway = in_aton(ip)) == ANY) |
5a874db4 | 1590 | ic_gateway = NONE; |
1da177e4 LT |
1591 | break; |
1592 | case 3: | |
e6f1cebf | 1593 | if ((ic_netmask = in_aton(ip)) == ANY) |
5a874db4 | 1594 | ic_netmask = NONE; |
1da177e4 LT |
1595 | break; |
1596 | case 4: | |
1597 | if ((dp = strchr(ip, '.'))) { | |
1598 | *dp++ = '\0'; | |
e9ff3990 SH |
1599 | strlcpy(utsname()->domainname, dp, |
1600 | sizeof(utsname()->domainname)); | |
1da177e4 | 1601 | } |
e9ff3990 SH |
1602 | strlcpy(utsname()->nodename, ip, |
1603 | sizeof(utsname()->nodename)); | |
1da177e4 LT |
1604 | ic_host_name_set = 1; |
1605 | break; | |
1606 | case 5: | |
1607 | strlcpy(user_dev_name, ip, sizeof(user_dev_name)); | |
1608 | break; | |
1609 | case 6: | |
92ffb85d AW |
1610 | if (ic_proto_name(ip) == 0 && |
1611 | ic_myaddr == NONE) { | |
1612 | ic_enable = 0; | |
1613 | } | |
1da177e4 LT |
1614 | break; |
1615 | } | |
1616 | } | |
1617 | ip = cp; | |
1618 | num++; | |
1619 | } | |
1620 | ||
1621 | return 1; | |
1622 | } | |
1623 | ||
1624 | static int __init nfsaddrs_config_setup(char *addrs) | |
1625 | { | |
1626 | return ip_auto_config_setup(addrs); | |
1627 | } | |
1628 | ||
62013dbb RJ |
1629 | static int __init vendor_class_identifier_setup(char *addrs) |
1630 | { | |
1631 | if (strlcpy(vendor_class_identifier, addrs, | |
1632 | sizeof(vendor_class_identifier)) | |
1633 | >= sizeof(vendor_class_identifier)) | |
1634 | printk(KERN_WARNING "DHCP: vendorclass too long, truncated to \"%s\"", | |
1635 | vendor_class_identifier); | |
1636 | return 1; | |
1637 | } | |
1638 | ||
1da177e4 LT |
1639 | __setup("ip=", ip_auto_config_setup); |
1640 | __setup("nfsaddrs=", nfsaddrs_config_setup); | |
62013dbb | 1641 | __setup("dhcpclass=", vendor_class_identifier_setup); |