Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Automatic Configuration of IP -- use DHCP, BOOTP, RARP, or |
4 | * user-supplied information to configure own IP address and routes. | |
5 | * | |
6 | * Copyright (C) 1996-1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz> | |
7 | * | |
8 | * Derived from network configuration code in fs/nfs/nfsroot.c, | |
9 | * originally Copyright (C) 1995, 1996 Gero Kuhlmann and me. | |
10 | * | |
11 | * BOOTP rewritten to construct and analyse packets itself instead | |
12 | * of misusing the IP layer. num_bugs_causing_wrong_arp_replies--; | |
13 | * -- MJ, December 1998 | |
e905a9ed | 14 | * |
1da177e4 LT |
15 | * Fixed ip_auto_config_setup calling at startup in the new "Linker Magic" |
16 | * initialization scheme. | |
17 | * - Arnaldo Carvalho de Melo <acme@conectiva.com.br>, 08/11/1999 | |
18 | * | |
19 | * DHCP support added. To users this looks like a whole separate | |
20 | * protocol, but we know it's just a bag on the side of BOOTP. | |
21 | * -- Chip Salzenberg <chip@valinux.com>, May 2000 | |
22 | * | |
23 | * Ported DHCP support from 2.2.16 to 2.4.0-test4 | |
24 | * -- Eric Biederman <ebiederman@lnxi.com>, 30 Aug 2000 | |
25 | * | |
26 | * Merged changes from 2.2.19 into 2.4.3 | |
27 | * -- Eric Biederman <ebiederman@lnxi.com>, 22 April Aug 2001 | |
28 | * | |
29 | * Multiple Nameservers in /proc/net/pnp | |
30 | * -- Josef Siemes <jsiemes@web.de>, Aug 2002 | |
c04d2cb2 CN |
31 | * |
32 | * NTP servers in /proc/net/ipconfig/ntp_servers | |
33 | * -- Chris Novakovic <chris@chrisn.me.uk>, April 2018 | |
1da177e4 LT |
34 | */ |
35 | ||
1da177e4 LT |
36 | #include <linux/types.h> |
37 | #include <linux/string.h> | |
38 | #include <linux/kernel.h> | |
39 | #include <linux/jiffies.h> | |
40 | #include <linux/random.h> | |
41 | #include <linux/init.h> | |
42 | #include <linux/utsname.h> | |
43 | #include <linux/in.h> | |
44 | #include <linux/if.h> | |
45 | #include <linux/inet.h> | |
14c85021 | 46 | #include <linux/inetdevice.h> |
1da177e4 LT |
47 | #include <linux/netdevice.h> |
48 | #include <linux/if_arp.h> | |
49 | #include <linux/skbuff.h> | |
50 | #include <linux/ip.h> | |
51 | #include <linux/socket.h> | |
52 | #include <linux/route.h> | |
53 | #include <linux/udp.h> | |
54 | #include <linux/proc_fs.h> | |
55 | #include <linux/seq_file.h> | |
56 | #include <linux/major.h> | |
57 | #include <linux/root_dev.h> | |
58 | #include <linux/delay.h> | |
43d60661 | 59 | #include <linux/nfs_fs.h> |
5a0e3ad6 | 60 | #include <linux/slab.h> |
bc3b2d7f | 61 | #include <linux/export.h> |
457c4cbc | 62 | #include <net/net_namespace.h> |
1da177e4 | 63 | #include <net/arp.h> |
c6e970a0 | 64 | #include <net/dsa.h> |
1da177e4 LT |
65 | #include <net/ip.h> |
66 | #include <net/ipconfig.h> | |
14c85021 | 67 | #include <net/route.h> |
1da177e4 | 68 | |
7c0f6ba6 | 69 | #include <linux/uaccess.h> |
1da177e4 LT |
70 | #include <net/checksum.h> |
71 | #include <asm/processor.h> | |
72 | ||
1da177e4 LT |
73 | #if defined(CONFIG_IP_PNP_DHCP) |
74 | #define IPCONFIG_DHCP | |
75 | #endif | |
76 | #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_DHCP) | |
77 | #define IPCONFIG_BOOTP | |
78 | #endif | |
79 | #if defined(CONFIG_IP_PNP_RARP) | |
80 | #define IPCONFIG_RARP | |
81 | #endif | |
82 | #if defined(IPCONFIG_BOOTP) || defined(IPCONFIG_RARP) | |
83 | #define IPCONFIG_DYNAMIC | |
84 | #endif | |
85 | ||
86 | /* Define the friendly delay before and after opening net devices */ | |
3fb72f1e MN |
87 | #define CONF_POST_OPEN 10 /* After opening: 10 msecs */ |
88 | #define CONF_CARRIER_TIMEOUT 120000 /* Wait for carrier timeout */ | |
1da177e4 LT |
89 | |
90 | /* Define the timeout for waiting for a DHCP/BOOTP/RARP reply */ | |
91 | #define CONF_OPEN_RETRIES 2 /* (Re)open devices twice */ | |
92 | #define CONF_SEND_RETRIES 6 /* Send six requests per open */ | |
1da177e4 LT |
93 | #define CONF_BASE_TIMEOUT (HZ*2) /* Initial timeout: 2 seconds */ |
94 | #define CONF_TIMEOUT_RANDOM (HZ) /* Maximum amount of randomization */ | |
95 | #define CONF_TIMEOUT_MULT *7/4 /* Rate of timeout growth */ | |
96 | #define CONF_TIMEOUT_MAX (HZ*30) /* Maximum allowed timeout */ | |
e905a9ed YH |
97 | #define CONF_NAMESERVERS_MAX 3 /* Maximum number of nameservers |
98 | - '3' from resolv.h */ | |
c04d2cb2 | 99 | #define CONF_NTP_SERVERS_MAX 3 /* Maximum number of NTP servers */ |
1da177e4 | 100 | |
09640e63 HH |
101 | #define NONE cpu_to_be32(INADDR_NONE) |
102 | #define ANY cpu_to_be32(INADDR_ANY) | |
1da177e4 LT |
103 | |
104 | /* | |
105 | * Public IP configuration | |
106 | */ | |
107 | ||
108 | /* This is used by platforms which might be able to set the ipconfig | |
109 | * variables using firmware environment vars. If this is set, it will | |
110 | * ignore such firmware variables. | |
111 | */ | |
112 | int ic_set_manually __initdata = 0; /* IPconfig parameters set manually */ | |
113 | ||
0d3979b9 | 114 | static int ic_enable __initdata; /* IP config enabled? */ |
1da177e4 LT |
115 | |
116 | /* Protocol choice */ | |
117 | int ic_proto_enabled __initdata = 0 | |
118 | #ifdef IPCONFIG_BOOTP | |
119 | | IC_BOOTP | |
120 | #endif | |
121 | #ifdef CONFIG_IP_PNP_DHCP | |
122 | | IC_USE_DHCP | |
123 | #endif | |
124 | #ifdef IPCONFIG_RARP | |
125 | | IC_RARP | |
126 | #endif | |
127 | ; | |
128 | ||
0d3979b9 | 129 | static int ic_host_name_set __initdata; /* Host name set by us? */ |
1da177e4 | 130 | |
5a874db4 AV |
131 | __be32 ic_myaddr = NONE; /* My IP address */ |
132 | static __be32 ic_netmask = NONE; /* Netmask for local subnet */ | |
133 | __be32 ic_gateway = NONE; /* Gateway IP address */ | |
1da177e4 | 134 | |
86ef7f9c | 135 | #ifdef IPCONFIG_DYNAMIC |
0b392be9 | 136 | static __be32 ic_addrservaddr = NONE; /* IP Address of the IP addresses'server */ |
86ef7f9c | 137 | #endif |
9dd4a13a | 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 | ||
1b0b04f9 DM |
144 | /* vendor class identifier */ |
145 | static char vendor_class_identifier[253] __initdata; | |
62013dbb | 146 | |
26fb342c LR |
147 | #if defined(CONFIG_IP_PNP_DHCP) |
148 | static char dhcp_client_identifier[253] __initdata; | |
149 | #endif | |
150 | ||
1da177e4 LT |
151 | /* Persistent data: */ |
152 | ||
52b79e2b | 153 | #ifdef IPCONFIG_DYNAMIC |
1da177e4 | 154 | static int ic_proto_used; /* Protocol used, if any */ |
52b79e2b AB |
155 | #else |
156 | #define ic_proto_used 0 | |
157 | #endif | |
5a874db4 | 158 | static __be32 ic_nameservers[CONF_NAMESERVERS_MAX]; /* DNS Server IP addresses */ |
c04d2cb2 | 159 | static __be32 ic_ntp_servers[CONF_NTP_SERVERS_MAX]; /* NTP server IP addresses */ |
1da177e4 LT |
160 | static u8 ic_domain[64]; /* DNS (not NIS) domain name */ |
161 | ||
162 | /* | |
163 | * Private state. | |
164 | */ | |
165 | ||
166 | /* Name of user-selected boot device */ | |
167 | static char user_dev_name[IFNAMSIZ] __initdata = { 0, }; | |
168 | ||
169 | /* Protocols supported by available interfaces */ | |
0d3979b9 | 170 | static int ic_proto_have_if __initdata; |
1da177e4 | 171 | |
9643f455 | 172 | /* MTU for boot device */ |
0d3979b9 | 173 | static int ic_dev_mtu __initdata; |
9643f455 | 174 | |
1da177e4 LT |
175 | #ifdef IPCONFIG_DYNAMIC |
176 | static DEFINE_SPINLOCK(ic_recv_lock); | |
0d3979b9 | 177 | static volatile int ic_got_reply __initdata; /* Proto(s) that replied */ |
1da177e4 LT |
178 | #endif |
179 | #ifdef IPCONFIG_DHCP | |
0d3979b9 | 180 | static int ic_dhcp_msgtype __initdata; /* DHCP msg type received */ |
1da177e4 LT |
181 | #endif |
182 | ||
183 | ||
184 | /* | |
185 | * Network devices | |
186 | */ | |
187 | ||
188 | struct ic_device { | |
189 | struct ic_device *next; | |
190 | struct net_device *dev; | |
191 | unsigned short flags; | |
192 | short able; | |
5a874db4 | 193 | __be32 xid; |
1da177e4 LT |
194 | }; |
195 | ||
0d3979b9 | 196 | static struct ic_device *ic_first_dev __initdata; /* List of open device */ |
2647cffb | 197 | static struct ic_device *ic_dev __initdata; /* Selected device */ |
1da177e4 | 198 | |
3fb72f1e | 199 | static bool __init ic_is_init_dev(struct net_device *dev) |
964ad81c | 200 | { |
3fb72f1e MN |
201 | if (dev->flags & IFF_LOOPBACK) |
202 | return false; | |
203 | return user_dev_name[0] ? !strcmp(dev->name, user_dev_name) : | |
964ad81c DM |
204 | (!(dev->flags & IFF_LOOPBACK) && |
205 | (dev->flags & (IFF_POINTOPOINT|IFF_BROADCAST)) && | |
3fb72f1e | 206 | strncmp(dev->name, "dummy", 5)); |
964ad81c DM |
207 | } |
208 | ||
1da177e4 LT |
209 | static int __init ic_open_devs(void) |
210 | { | |
211 | struct ic_device *d, **last; | |
212 | struct net_device *dev; | |
213 | unsigned short oflags; | |
5e404cd6 | 214 | unsigned long start, next_msg; |
1da177e4 LT |
215 | |
216 | last = &ic_first_dev; | |
6756ae4b | 217 | rtnl_lock(); |
1da177e4 | 218 | |
728c0208 | 219 | /* bring loopback and DSA master network devices up first */ |
0cc217e1 | 220 | for_each_netdev(&init_net, dev) { |
728c0208 | 221 | if (!(dev->flags & IFF_LOOPBACK) && !netdev_uses_dsa(dev)) |
0cc217e1 | 222 | continue; |
567c5e13 | 223 | if (dev_change_flags(dev, dev->flags | IFF_UP, NULL) < 0) |
058bd4d2 | 224 | pr_err("IP-Config: Failed to open %s\n", dev->name); |
0cc217e1 | 225 | } |
1da177e4 | 226 | |
881d966b | 227 | for_each_netdev(&init_net, dev) { |
3fb72f1e | 228 | if (ic_is_init_dev(dev)) { |
1da177e4 LT |
229 | int able = 0; |
230 | if (dev->mtu >= 364) | |
231 | able |= IC_BOOTP; | |
232 | else | |
09605cc1 | 233 | pr_warn("DHCP/BOOTP: Ignoring device %s, MTU %d too small\n", |
058bd4d2 | 234 | dev->name, dev->mtu); |
1da177e4 LT |
235 | if (!(dev->flags & IFF_NOARP)) |
236 | able |= IC_RARP; | |
237 | able &= ic_proto_enabled; | |
238 | if (ic_proto_enabled && !able) | |
239 | continue; | |
240 | oflags = dev->flags; | |
567c5e13 | 241 | if (dev_change_flags(dev, oflags | IFF_UP, NULL) < 0) { |
058bd4d2 JP |
242 | pr_err("IP-Config: Failed to open %s\n", |
243 | dev->name); | |
1da177e4 LT |
244 | continue; |
245 | } | |
246 | if (!(d = kmalloc(sizeof(struct ic_device), GFP_KERNEL))) { | |
6756ae4b | 247 | rtnl_unlock(); |
964ad81c | 248 | return -ENOMEM; |
1da177e4 LT |
249 | } |
250 | d->dev = dev; | |
251 | *last = d; | |
252 | last = &d->next; | |
253 | d->flags = oflags; | |
254 | d->able = able; | |
255 | if (able & IC_BOOTP) | |
5a874db4 | 256 | get_random_bytes(&d->xid, sizeof(__be32)); |
1da177e4 LT |
257 | else |
258 | d->xid = 0; | |
259 | ic_proto_have_if |= able; | |
09605cc1 BS |
260 | pr_debug("IP-Config: %s UP (able=%d, xid=%08x)\n", |
261 | dev->name, able, d->xid); | |
1da177e4 LT |
262 | } |
263 | } | |
3fb72f1e | 264 | |
cd7816d1 GF |
265 | /* no point in waiting if we could not bring up at least one device */ |
266 | if (!ic_first_dev) | |
267 | goto have_carrier; | |
268 | ||
3fb72f1e MN |
269 | /* wait for a carrier on at least one device */ |
270 | start = jiffies; | |
5e404cd6 | 271 | next_msg = start + msecs_to_jiffies(CONF_CARRIER_TIMEOUT/12); |
c72c95a0 HS |
272 | while (time_before(jiffies, start + |
273 | msecs_to_jiffies(CONF_CARRIER_TIMEOUT))) { | |
5e404cd6 PG |
274 | int wait, elapsed; |
275 | ||
3fb72f1e MN |
276 | for_each_netdev(&init_net, dev) |
277 | if (ic_is_init_dev(dev) && netif_carrier_ok(dev)) | |
278 | goto have_carrier; | |
279 | ||
280 | msleep(1); | |
5e404cd6 | 281 | |
357137a4 | 282 | if (time_before(jiffies, next_msg)) |
5e404cd6 PG |
283 | continue; |
284 | ||
285 | elapsed = jiffies_to_msecs(jiffies - start); | |
286 | wait = (CONF_CARRIER_TIMEOUT - elapsed + 500)/1000; | |
287 | pr_info("Waiting up to %d more seconds for network.\n", wait); | |
288 | next_msg = jiffies + msecs_to_jiffies(CONF_CARRIER_TIMEOUT/12); | |
3fb72f1e MN |
289 | } |
290 | have_carrier: | |
6756ae4b | 291 | rtnl_unlock(); |
1da177e4 LT |
292 | |
293 | *last = NULL; | |
294 | ||
295 | if (!ic_first_dev) { | |
296 | if (user_dev_name[0]) | |
058bd4d2 JP |
297 | pr_err("IP-Config: Device `%s' not found\n", |
298 | user_dev_name); | |
1da177e4 | 299 | else |
058bd4d2 | 300 | pr_err("IP-Config: No network devices available\n"); |
964ad81c | 301 | return -ENODEV; |
1da177e4 LT |
302 | } |
303 | return 0; | |
304 | } | |
305 | ||
306 | static void __init ic_close_devs(void) | |
307 | { | |
308 | struct ic_device *d, *next; | |
309 | struct net_device *dev; | |
310 | ||
6756ae4b | 311 | rtnl_lock(); |
1da177e4 LT |
312 | next = ic_first_dev; |
313 | while ((d = next)) { | |
314 | next = d->next; | |
315 | dev = d->dev; | |
ffefb6f4 | 316 | if (d != ic_dev && !netdev_uses_dsa(dev)) { |
09605cc1 | 317 | pr_debug("IP-Config: Downing %s\n", dev->name); |
567c5e13 | 318 | dev_change_flags(dev, d->flags, NULL); |
1da177e4 LT |
319 | } |
320 | kfree(d); | |
321 | } | |
6756ae4b | 322 | rtnl_unlock(); |
1da177e4 LT |
323 | } |
324 | ||
325 | /* | |
326 | * Interface to various network functions. | |
327 | */ | |
328 | ||
329 | static inline void | |
5a874db4 | 330 | set_sockaddr(struct sockaddr_in *sin, __be32 addr, __be16 port) |
1da177e4 LT |
331 | { |
332 | sin->sin_family = AF_INET; | |
333 | sin->sin_addr.s_addr = addr; | |
334 | sin->sin_port = port; | |
335 | } | |
336 | ||
1da177e4 LT |
337 | /* |
338 | * Set up interface addresses and routes. | |
339 | */ | |
340 | ||
341 | static int __init ic_setup_if(void) | |
342 | { | |
343 | struct ifreq ir; | |
344 | struct sockaddr_in *sin = (void *) &ir.ifr_ifru.ifru_addr; | |
345 | int err; | |
346 | ||
347 | memset(&ir, 0, sizeof(ir)); | |
2647cffb | 348 | strcpy(ir.ifr_ifrn.ifrn_name, ic_dev->dev->name); |
1da177e4 | 349 | set_sockaddr(sin, ic_myaddr, 0); |
03aef17b | 350 | if ((err = devinet_ioctl(&init_net, SIOCSIFADDR, &ir)) < 0) { |
058bd4d2 JP |
351 | pr_err("IP-Config: Unable to set interface address (%d)\n", |
352 | err); | |
1da177e4 LT |
353 | return -1; |
354 | } | |
355 | set_sockaddr(sin, ic_netmask, 0); | |
03aef17b | 356 | if ((err = devinet_ioctl(&init_net, SIOCSIFNETMASK, &ir)) < 0) { |
058bd4d2 JP |
357 | pr_err("IP-Config: Unable to set interface netmask (%d)\n", |
358 | err); | |
1da177e4 LT |
359 | return -1; |
360 | } | |
361 | set_sockaddr(sin, ic_myaddr | ~ic_netmask, 0); | |
03aef17b | 362 | if ((err = devinet_ioctl(&init_net, SIOCSIFBRDADDR, &ir)) < 0) { |
058bd4d2 JP |
363 | pr_err("IP-Config: Unable to set interface broadcast address (%d)\n", |
364 | err); | |
1da177e4 LT |
365 | return -1; |
366 | } | |
9643f455 CF |
367 | /* Handle the case where we need non-standard MTU on the boot link (a network |
368 | * using jumbo frames, for instance). If we can't set the mtu, don't error | |
369 | * out, we'll try to muddle along. | |
370 | */ | |
371 | if (ic_dev_mtu != 0) { | |
6a88fbe7 AV |
372 | rtnl_lock(); |
373 | if ((err = dev_set_mtu(ic_dev->dev, ic_dev_mtu)) < 0) | |
058bd4d2 JP |
374 | pr_err("IP-Config: Unable to set interface mtu to %d (%d)\n", |
375 | ic_dev_mtu, err); | |
6a88fbe7 | 376 | rtnl_unlock(); |
9643f455 | 377 | } |
1da177e4 LT |
378 | return 0; |
379 | } | |
380 | ||
381 | static int __init ic_setup_routes(void) | |
382 | { | |
383 | /* No need to setup device routes, only the default route... */ | |
384 | ||
5a874db4 | 385 | if (ic_gateway != NONE) { |
1da177e4 LT |
386 | struct rtentry rm; |
387 | int err; | |
388 | ||
389 | memset(&rm, 0, sizeof(rm)); | |
390 | if ((ic_gateway ^ ic_myaddr) & ic_netmask) { | |
058bd4d2 | 391 | pr_err("IP-Config: Gateway not on directly connected network\n"); |
1da177e4 LT |
392 | return -1; |
393 | } | |
394 | set_sockaddr((struct sockaddr_in *) &rm.rt_dst, 0, 0); | |
395 | set_sockaddr((struct sockaddr_in *) &rm.rt_genmask, 0, 0); | |
396 | set_sockaddr((struct sockaddr_in *) &rm.rt_gateway, ic_gateway, 0); | |
397 | rm.rt_flags = RTF_UP | RTF_GATEWAY; | |
ca25c300 | 398 | if ((err = ip_rt_ioctl(&init_net, SIOCADDRT, &rm)) < 0) { |
058bd4d2 JP |
399 | pr_err("IP-Config: Cannot add default route (%d)\n", |
400 | err); | |
1da177e4 LT |
401 | return -1; |
402 | } | |
403 | } | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
408 | /* | |
409 | * Fill in default values for all missing parameters. | |
410 | */ | |
411 | ||
412 | static int __init ic_defaults(void) | |
413 | { | |
414 | /* | |
415 | * At this point we have no userspace running so need not | |
416 | * claim locks on system_utsname | |
417 | */ | |
e905a9ed | 418 | |
1da177e4 | 419 | if (!ic_host_name_set) |
673d57e7 | 420 | sprintf(init_utsname()->nodename, "%pI4", &ic_myaddr); |
1da177e4 | 421 | |
5a874db4 | 422 | if (root_server_addr == NONE) |
1da177e4 LT |
423 | root_server_addr = ic_servaddr; |
424 | ||
5a874db4 | 425 | if (ic_netmask == NONE) { |
1da177e4 LT |
426 | if (IN_CLASSA(ntohl(ic_myaddr))) |
427 | ic_netmask = htonl(IN_CLASSA_NET); | |
428 | else if (IN_CLASSB(ntohl(ic_myaddr))) | |
429 | ic_netmask = htonl(IN_CLASSB_NET); | |
430 | else if (IN_CLASSC(ntohl(ic_myaddr))) | |
431 | ic_netmask = htonl(IN_CLASSC_NET); | |
65cab850 DT |
432 | else if (IN_CLASSE(ntohl(ic_myaddr))) |
433 | ic_netmask = htonl(IN_CLASSE_NET); | |
1da177e4 | 434 | else { |
058bd4d2 JP |
435 | pr_err("IP-Config: Unable to guess netmask for address %pI4\n", |
436 | &ic_myaddr); | |
1da177e4 LT |
437 | return -1; |
438 | } | |
09605cc1 BS |
439 | pr_notice("IP-Config: Guessing netmask %pI4\n", |
440 | &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; |
6b436d33 | 478 | unsigned char *tha; /* t for "target" */ |
1da177e4 LT |
479 | struct ic_device *d; |
480 | ||
721499e8 | 481 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
482 | goto drop; |
483 | ||
51456b29 IM |
484 | skb = skb_share_check(skb, GFP_ATOMIC); |
485 | if (!skb) | |
1da177e4 LT |
486 | return NET_RX_DROP; |
487 | ||
488 | if (!pskb_may_pull(skb, sizeof(struct arphdr))) | |
489 | goto drop; | |
490 | ||
491 | /* Basic sanity checks can be done without the lock. */ | |
9c70220b | 492 | rarp = (struct arphdr *)skb_transport_header(skb); |
1da177e4 LT |
493 | |
494 | /* If this test doesn't pass, it's not IP, or we should | |
495 | * ignore it anyway. | |
496 | */ | |
497 | if (rarp->ar_hln != dev->addr_len || dev->type != ntohs(rarp->ar_hrd)) | |
498 | goto drop; | |
499 | ||
500 | /* If it's not a RARP reply, delete it. */ | |
501 | if (rarp->ar_op != htons(ARPOP_RREPLY)) | |
502 | goto drop; | |
503 | ||
504 | /* If it's not Ethernet, delete it. */ | |
505 | if (rarp->ar_pro != htons(ETH_P_IP)) | |
506 | goto drop; | |
507 | ||
988b7050 | 508 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) |
1da177e4 LT |
509 | goto drop; |
510 | ||
511 | /* OK, it is all there and looks valid, process... */ | |
9c70220b | 512 | rarp = (struct arphdr *)skb_transport_header(skb); |
1da177e4 LT |
513 | rarp_ptr = (unsigned char *) (rarp + 1); |
514 | ||
515 | /* One reply at a time, please. */ | |
516 | spin_lock(&ic_recv_lock); | |
517 | ||
518 | /* If we already have a reply, just drop the packet */ | |
519 | if (ic_got_reply) | |
520 | goto drop_unlock; | |
521 | ||
522 | /* Find the ic_device that the packet arrived on */ | |
523 | d = ic_first_dev; | |
524 | while (d && d->dev != dev) | |
525 | d = d->next; | |
526 | if (!d) | |
527 | goto drop_unlock; /* should never happen */ | |
528 | ||
529 | /* Extract variable-width fields */ | |
1da177e4 LT |
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! */ | |
2647cffb | 546 | ic_dev = d; |
5a874db4 | 547 | if (ic_myaddr == NONE) |
1da177e4 LT |
548 | ic_myaddr = tip; |
549 | ic_servaddr = sip; | |
9dd4a13a | 550 | ic_addrservaddr = sip; |
1da177e4 LT |
551 | ic_got_reply = IC_RARP; |
552 | ||
553 | drop_unlock: | |
554 | /* Show's over. Nothing to see here. */ | |
555 | spin_unlock(&ic_recv_lock); | |
556 | ||
557 | drop: | |
558 | /* Throw the packet out. */ | |
559 | kfree_skb(skb); | |
560 | return 0; | |
561 | } | |
562 | ||
563 | ||
564 | /* | |
565 | * Send RARP request packet over a single interface. | |
566 | */ | |
567 | static void __init ic_rarp_send_if(struct ic_device *d) | |
568 | { | |
569 | struct net_device *dev = d->dev; | |
570 | arp_send(ARPOP_RREQUEST, ETH_P_RARP, 0, dev, 0, NULL, | |
571 | dev->dev_addr, dev->dev_addr); | |
572 | } | |
573 | #endif | |
574 | ||
842b08bb AS |
575 | /* |
576 | * Predefine Nameservers | |
577 | */ | |
578 | static inline void __init ic_nameservers_predef(void) | |
579 | { | |
580 | int i; | |
581 | ||
582 | for (i = 0; i < CONF_NAMESERVERS_MAX; i++) | |
583 | ic_nameservers[i] = NONE; | |
584 | } | |
585 | ||
c04d2cb2 CN |
586 | /* Predefine NTP servers */ |
587 | static inline void __init ic_ntp_servers_predef(void) | |
588 | { | |
589 | int i; | |
590 | ||
591 | for (i = 0; i < CONF_NTP_SERVERS_MAX; i++) | |
592 | ic_ntp_servers[i] = NONE; | |
593 | } | |
594 | ||
1da177e4 LT |
595 | /* |
596 | * DHCP/BOOTP support. | |
597 | */ | |
598 | ||
599 | #ifdef IPCONFIG_BOOTP | |
600 | ||
601 | struct bootp_pkt { /* BOOTP packet format */ | |
602 | struct iphdr iph; /* IP header */ | |
603 | struct udphdr udph; /* UDP header */ | |
604 | u8 op; /* 1=request, 2=reply */ | |
605 | u8 htype; /* HW address type */ | |
606 | u8 hlen; /* HW address length */ | |
607 | u8 hops; /* Used only by gateways */ | |
5a874db4 AV |
608 | __be32 xid; /* Transaction ID */ |
609 | __be16 secs; /* Seconds since we started */ | |
610 | __be16 flags; /* Just what it says */ | |
611 | __be32 client_ip; /* Client's IP address if known */ | |
612 | __be32 your_ip; /* Assigned IP address */ | |
613 | __be32 server_ip; /* (Next, e.g. NFS) Server's IP address */ | |
614 | __be32 relay_ip; /* IP address of BOOTP relay */ | |
1da177e4 LT |
615 | u8 hw_addr[16]; /* Client's HW address */ |
616 | u8 serv_name[64]; /* Server host name */ | |
617 | u8 boot_file[128]; /* Name of boot file */ | |
618 | u8 exten[312]; /* DHCP options / BOOTP vendor extensions */ | |
619 | }; | |
620 | ||
621 | /* packet ops */ | |
622 | #define BOOTP_REQUEST 1 | |
623 | #define BOOTP_REPLY 2 | |
624 | ||
625 | /* DHCP message types */ | |
626 | #define DHCPDISCOVER 1 | |
627 | #define DHCPOFFER 2 | |
628 | #define DHCPREQUEST 3 | |
629 | #define DHCPDECLINE 4 | |
630 | #define DHCPACK 5 | |
631 | #define DHCPNAK 6 | |
632 | #define DHCPRELEASE 7 | |
633 | #define DHCPINFORM 8 | |
634 | ||
f2ccd8fa | 635 | static int ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev); |
1da177e4 LT |
636 | |
637 | static struct packet_type bootp_packet_type __initdata = { | |
09640e63 | 638 | .type = cpu_to_be16(ETH_P_IP), |
1da177e4 LT |
639 | .func = ic_bootp_recv, |
640 | }; | |
641 | ||
1da177e4 LT |
642 | /* |
643 | * Initialize DHCP/BOOTP extension fields in the request. | |
644 | */ | |
645 | ||
646 | static const u8 ic_bootp_cookie[4] = { 99, 130, 83, 99 }; | |
647 | ||
648 | #ifdef IPCONFIG_DHCP | |
649 | ||
650 | static void __init | |
22fc5388 | 651 | ic_dhcp_init_options(u8 *options, struct ic_device *d) |
1da177e4 | 652 | { |
5a874db4 | 653 | u8 mt = ((ic_servaddr == NONE) |
1da177e4 LT |
654 | ? DHCPDISCOVER : DHCPREQUEST); |
655 | u8 *e = options; | |
62013dbb | 656 | int len; |
1da177e4 | 657 | |
22fc5388 | 658 | pr_debug("DHCP: Sending message type %d (%s)\n", mt, d->dev->name); |
1da177e4 LT |
659 | |
660 | memcpy(e, ic_bootp_cookie, 4); /* RFC1048 Magic Cookie */ | |
661 | e += 4; | |
662 | ||
663 | *e++ = 53; /* DHCP message type */ | |
664 | *e++ = 1; | |
665 | *e++ = mt; | |
666 | ||
667 | if (mt == DHCPREQUEST) { | |
668 | *e++ = 54; /* Server ID (IP address) */ | |
669 | *e++ = 4; | |
670 | memcpy(e, &ic_servaddr, 4); | |
671 | e += 4; | |
672 | ||
673 | *e++ = 50; /* Requested IP address */ | |
674 | *e++ = 4; | |
675 | memcpy(e, &ic_myaddr, 4); | |
676 | e += 4; | |
677 | } | |
678 | ||
679 | /* always? */ | |
680 | { | |
681 | static const u8 ic_req_params[] = { | |
682 | 1, /* Subnet mask */ | |
683 | 3, /* Default gateway */ | |
684 | 6, /* DNS server */ | |
685 | 12, /* Host name */ | |
686 | 15, /* Domain name */ | |
687 | 17, /* Boot path */ | |
9643f455 | 688 | 26, /* MTU */ |
1da177e4 | 689 | 40, /* NIS domain name */ |
c04d2cb2 | 690 | 42, /* NTP servers */ |
1da177e4 LT |
691 | }; |
692 | ||
693 | *e++ = 55; /* Parameter request list */ | |
694 | *e++ = sizeof(ic_req_params); | |
695 | memcpy(e, ic_req_params, sizeof(ic_req_params)); | |
696 | e += sizeof(ic_req_params); | |
62013dbb | 697 | |
130c0f47 WF |
698 | if (ic_host_name_set) { |
699 | *e++ = 12; /* host-name */ | |
700 | len = strlen(utsname()->nodename); | |
701 | *e++ = len; | |
702 | memcpy(e, utsname()->nodename, len); | |
703 | e += len; | |
704 | } | |
62013dbb | 705 | if (*vendor_class_identifier) { |
058bd4d2 JP |
706 | pr_info("DHCP: sending class identifier \"%s\"\n", |
707 | vendor_class_identifier); | |
62013dbb RJ |
708 | *e++ = 60; /* Class-identifier */ |
709 | len = strlen(vendor_class_identifier); | |
710 | *e++ = len; | |
711 | memcpy(e, vendor_class_identifier, len); | |
712 | e += len; | |
713 | } | |
26fb342c LR |
714 | len = strlen(dhcp_client_identifier + 1); |
715 | /* the minimum length of identifier is 2, include 1 byte type, | |
716 | * and can not be larger than the length of options | |
717 | */ | |
718 | if (len >= 1 && len < 312 - (e - options) - 1) { | |
719 | *e++ = 61; | |
720 | *e++ = len + 1; | |
721 | memcpy(e, dhcp_client_identifier, len + 1); | |
722 | e += len + 1; | |
723 | } | |
1da177e4 LT |
724 | } |
725 | ||
726 | *e++ = 255; /* End of the list */ | |
727 | } | |
728 | ||
729 | #endif /* IPCONFIG_DHCP */ | |
730 | ||
731 | static void __init ic_bootp_init_ext(u8 *e) | |
732 | { | |
733 | memcpy(e, ic_bootp_cookie, 4); /* RFC1048 Magic Cookie */ | |
734 | e += 4; | |
735 | *e++ = 1; /* Subnet mask request */ | |
736 | *e++ = 4; | |
737 | e += 4; | |
738 | *e++ = 3; /* Default gateway request */ | |
739 | *e++ = 4; | |
740 | e += 4; | |
de1fa15b | 741 | #if CONF_NAMESERVERS_MAX > 0 |
4e1a8af2 | 742 | *e++ = 6; /* (DNS) name server request */ |
de1fa15b CN |
743 | *e++ = 4 * CONF_NAMESERVERS_MAX; |
744 | e += 4 * CONF_NAMESERVERS_MAX; | |
745 | #endif | |
1da177e4 LT |
746 | *e++ = 12; /* Host name request */ |
747 | *e++ = 32; | |
748 | e += 32; | |
749 | *e++ = 40; /* NIS Domain name request */ | |
750 | *e++ = 32; | |
751 | e += 32; | |
752 | *e++ = 17; /* Boot path */ | |
753 | *e++ = 40; | |
754 | e += 40; | |
755 | ||
e905a9ed | 756 | *e++ = 57; /* set extension buffer size for reply */ |
1da177e4 | 757 | *e++ = 2; |
e905a9ed | 758 | *e++ = 1; /* 128+236+8+20+14, see dhcpd sources */ |
1da177e4 LT |
759 | *e++ = 150; |
760 | ||
761 | *e++ = 255; /* End of the list */ | |
762 | } | |
763 | ||
764 | ||
5e953778 CF |
765 | /* |
766 | * Initialize the DHCP/BOOTP mechanism. | |
767 | */ | |
768 | static inline void __init ic_bootp_init(void) | |
769 | { | |
c04d2cb2 CN |
770 | /* Re-initialise all name servers and NTP servers to NONE, in case any |
771 | * were set via the "ip=" or "nfsaddrs=" kernel command line parameters: | |
772 | * any IP addresses specified there will already have been decoded but | |
773 | * are no longer needed | |
300eec7c | 774 | */ |
5e953778 | 775 | ic_nameservers_predef(); |
c04d2cb2 | 776 | ic_ntp_servers_predef(); |
1da177e4 LT |
777 | |
778 | dev_add_pack(&bootp_packet_type); | |
779 | } | |
780 | ||
781 | ||
782 | /* | |
783 | * DHCP/BOOTP cleanup. | |
784 | */ | |
45e741b8 | 785 | static inline void __init ic_bootp_cleanup(void) |
1da177e4 LT |
786 | { |
787 | dev_remove_pack(&bootp_packet_type); | |
788 | } | |
789 | ||
790 | ||
791 | /* | |
792 | * Send DHCP/BOOTP request to single interface. | |
793 | */ | |
794 | static void __init ic_bootp_send_if(struct ic_device *d, unsigned long jiffies_diff) | |
795 | { | |
796 | struct net_device *dev = d->dev; | |
797 | struct sk_buff *skb; | |
798 | struct bootp_pkt *b; | |
1da177e4 | 799 | struct iphdr *h; |
66088243 HX |
800 | int hlen = LL_RESERVED_SPACE(dev); |
801 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
802 | |
803 | /* Allocate packet */ | |
66088243 | 804 | skb = alloc_skb(sizeof(struct bootp_pkt) + hlen + tlen + 15, |
f5184d26 | 805 | GFP_KERNEL); |
1da177e4 LT |
806 | if (!skb) |
807 | return; | |
66088243 | 808 | skb_reserve(skb, hlen); |
b080db58 | 809 | b = skb_put_zero(skb, sizeof(struct bootp_pkt)); |
1da177e4 LT |
810 | |
811 | /* Construct IP header */ | |
04b964db | 812 | skb_reset_network_header(skb); |
eddc9ec5 | 813 | h = ip_hdr(skb); |
1da177e4 LT |
814 | h->version = 4; |
815 | h->ihl = 5; | |
816 | h->tot_len = htons(sizeof(struct bootp_pkt)); | |
817 | h->frag_off = htons(IP_DF); | |
818 | h->ttl = 64; | |
819 | h->protocol = IPPROTO_UDP; | |
5a874db4 | 820 | h->daddr = htonl(INADDR_BROADCAST); |
1da177e4 LT |
821 | h->check = ip_fast_csum((unsigned char *) h, h->ihl); |
822 | ||
823 | /* Construct UDP header */ | |
824 | b->udph.source = htons(68); | |
825 | b->udph.dest = htons(67); | |
826 | b->udph.len = htons(sizeof(struct bootp_pkt) - sizeof(struct iphdr)); | |
827 | /* UDP checksum not calculated -- explicitly allowed in BOOTP RFC */ | |
828 | ||
829 | /* Construct DHCP/BOOTP header */ | |
830 | b->op = BOOTP_REQUEST; | |
831 | if (dev->type < 256) /* check for false types */ | |
832 | b->htype = dev->type; | |
1da177e4 LT |
833 | else if (dev->type == ARPHRD_FDDI) |
834 | b->htype = ARPHRD_ETHER; | |
835 | else { | |
09605cc1 BS |
836 | pr_warn("Unknown ARP type 0x%04x for device %s\n", dev->type, |
837 | dev->name); | |
1da177e4 LT |
838 | b->htype = dev->type; /* can cause undefined behavior */ |
839 | } | |
dea75bdf SH |
840 | |
841 | /* server_ip and your_ip address are both already zero per RFC2131 */ | |
1da177e4 | 842 | b->hlen = dev->addr_len; |
1da177e4 LT |
843 | memcpy(b->hw_addr, dev->dev_addr, dev->addr_len); |
844 | b->secs = htons(jiffies_diff / HZ); | |
845 | b->xid = d->xid; | |
846 | ||
847 | /* add DHCP options or BOOTP extensions */ | |
848 | #ifdef IPCONFIG_DHCP | |
849 | if (ic_proto_enabled & IC_USE_DHCP) | |
22fc5388 | 850 | ic_dhcp_init_options(b->exten, d); |
1da177e4 LT |
851 | else |
852 | #endif | |
853 | ic_bootp_init_ext(b->exten); | |
854 | ||
855 | /* Chain packet down the line... */ | |
856 | skb->dev = dev; | |
857 | skb->protocol = htons(ETH_P_IP); | |
0c4e8581 | 858 | if (dev_hard_header(skb, dev, ntohs(skb->protocol), |
ad79eefc RL |
859 | dev->broadcast, dev->dev_addr, skb->len) < 0) { |
860 | kfree_skb(skb); | |
861 | printk("E"); | |
862 | return; | |
863 | } | |
864 | ||
865 | if (dev_queue_xmit(skb) < 0) | |
1da177e4 LT |
866 | printk("E"); |
867 | } | |
868 | ||
869 | ||
870 | /* | |
871 | * Copy BOOTP-supplied string if not already set. | |
872 | */ | |
873 | static int __init ic_bootp_string(char *dest, char *src, int len, int max) | |
874 | { | |
875 | if (!len) | |
876 | return 0; | |
877 | if (len > max-1) | |
878 | len = max-1; | |
879 | memcpy(dest, src, len); | |
880 | dest[len] = '\0'; | |
881 | return 1; | |
882 | } | |
883 | ||
884 | ||
885 | /* | |
886 | * Process BOOTP extensions. | |
887 | */ | |
888 | static void __init ic_do_bootp_ext(u8 *ext) | |
889 | { | |
747465ef ED |
890 | u8 servers; |
891 | int i; | |
892 | __be16 mtu; | |
1da177e4 | 893 | |
1da177e4 LT |
894 | u8 *c; |
895 | ||
09605cc1 | 896 | pr_debug("DHCP/BOOTP: Got extension %d:", *ext); |
132adf54 | 897 | for (c=ext+2; c<ext+2+ext[1]; c++) |
09605cc1 BS |
898 | pr_debug(" %02x", *c); |
899 | pr_debug("\n"); | |
1da177e4 LT |
900 | |
901 | switch (*ext++) { | |
1d67a516 JP |
902 | case 1: /* Subnet mask */ |
903 | if (ic_netmask == NONE) | |
904 | memcpy(&ic_netmask, ext+1, 4); | |
905 | break; | |
906 | case 3: /* Default gateway */ | |
907 | if (ic_gateway == NONE) | |
908 | memcpy(&ic_gateway, ext+1, 4); | |
909 | break; | |
910 | case 6: /* DNS server */ | |
911 | servers= *ext/4; | |
912 | if (servers > CONF_NAMESERVERS_MAX) | |
913 | servers = CONF_NAMESERVERS_MAX; | |
914 | for (i = 0; i < servers; i++) { | |
915 | if (ic_nameservers[i] == NONE) | |
916 | memcpy(&ic_nameservers[i], ext+1+4*i, 4); | |
917 | } | |
918 | break; | |
919 | case 12: /* Host name */ | |
920 | ic_bootp_string(utsname()->nodename, ext+1, *ext, | |
921 | __NEW_UTS_LEN); | |
922 | ic_host_name_set = 1; | |
923 | break; | |
924 | case 15: /* Domain name (DNS) */ | |
925 | ic_bootp_string(ic_domain, ext+1, *ext, sizeof(ic_domain)); | |
926 | break; | |
927 | case 17: /* Root path */ | |
928 | if (!root_server_path[0]) | |
929 | ic_bootp_string(root_server_path, ext+1, *ext, | |
930 | sizeof(root_server_path)); | |
931 | break; | |
932 | case 26: /* Interface MTU */ | |
933 | memcpy(&mtu, ext+1, sizeof(mtu)); | |
934 | ic_dev_mtu = ntohs(mtu); | |
935 | break; | |
936 | case 40: /* NIS Domain name (_not_ DNS) */ | |
937 | ic_bootp_string(utsname()->domainname, ext+1, *ext, | |
938 | __NEW_UTS_LEN); | |
939 | break; | |
c04d2cb2 CN |
940 | case 42: /* NTP servers */ |
941 | servers = *ext / 4; | |
942 | if (servers > CONF_NTP_SERVERS_MAX) | |
943 | servers = CONF_NTP_SERVERS_MAX; | |
944 | for (i = 0; i < servers; i++) { | |
945 | if (ic_ntp_servers[i] == NONE) | |
946 | memcpy(&ic_ntp_servers[i], ext+1+4*i, 4); | |
947 | } | |
948 | break; | |
1da177e4 LT |
949 | } |
950 | } | |
951 | ||
952 | ||
953 | /* | |
954 | * Receive BOOTP reply. | |
955 | */ | |
f2ccd8fa | 956 | 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 |
957 | { |
958 | struct bootp_pkt *b; | |
959 | struct iphdr *h; | |
960 | struct ic_device *d; | |
961 | int len, ext_len; | |
962 | ||
721499e8 | 963 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
964 | goto drop; |
965 | ||
1da177e4 LT |
966 | /* Perform verifications before taking the lock. */ |
967 | if (skb->pkt_type == PACKET_OTHERHOST) | |
968 | goto drop; | |
969 | ||
51456b29 IM |
970 | skb = skb_share_check(skb, GFP_ATOMIC); |
971 | if (!skb) | |
1da177e4 LT |
972 | return NET_RX_DROP; |
973 | ||
974 | if (!pskb_may_pull(skb, | |
975 | sizeof(struct iphdr) + | |
976 | sizeof(struct udphdr))) | |
977 | goto drop; | |
978 | ||
eddc9ec5 | 979 | b = (struct bootp_pkt *)skb_network_header(skb); |
1da177e4 LT |
980 | h = &b->iph; |
981 | ||
982 | if (h->ihl != 5 || h->version != 4 || h->protocol != IPPROTO_UDP) | |
983 | goto drop; | |
984 | ||
985 | /* Fragments are not supported */ | |
56f8a75c | 986 | if (ip_is_fragment(h)) { |
e87cc472 | 987 | net_err_ratelimited("DHCP/BOOTP: Ignoring fragmented reply\n"); |
1da177e4 LT |
988 | goto drop; |
989 | } | |
990 | ||
991 | if (skb->len < ntohs(h->tot_len)) | |
992 | goto drop; | |
993 | ||
994 | if (ip_fast_csum((char *) h, h->ihl)) | |
995 | goto drop; | |
996 | ||
997 | if (b->udph.source != htons(67) || b->udph.dest != htons(68)) | |
998 | goto drop; | |
999 | ||
1000 | if (ntohs(h->tot_len) < ntohs(b->udph.len) + sizeof(struct iphdr)) | |
1001 | goto drop; | |
1002 | ||
1003 | len = ntohs(b->udph.len) - sizeof(struct udphdr); | |
1004 | ext_len = len - (sizeof(*b) - | |
1005 | sizeof(struct iphdr) - | |
1006 | sizeof(struct udphdr) - | |
1007 | sizeof(b->exten)); | |
1008 | if (ext_len < 0) | |
1009 | goto drop; | |
1010 | ||
1011 | /* Ok the front looks good, make sure we can get at the rest. */ | |
1012 | if (!pskb_may_pull(skb, skb->len)) | |
1013 | goto drop; | |
1014 | ||
eddc9ec5 | 1015 | b = (struct bootp_pkt *)skb_network_header(skb); |
1da177e4 LT |
1016 | h = &b->iph; |
1017 | ||
1018 | /* One reply at a time, please. */ | |
1019 | spin_lock(&ic_recv_lock); | |
1020 | ||
1021 | /* If we already have a reply, just drop the packet */ | |
1022 | if (ic_got_reply) | |
1023 | goto drop_unlock; | |
1024 | ||
1025 | /* Find the ic_device that the packet arrived on */ | |
1026 | d = ic_first_dev; | |
1027 | while (d && d->dev != dev) | |
1028 | d = d->next; | |
1029 | if (!d) | |
1030 | goto drop_unlock; /* should never happen */ | |
1031 | ||
1032 | /* Is it a reply to our BOOTP request? */ | |
1033 | if (b->op != BOOTP_REPLY || | |
1034 | b->xid != d->xid) { | |
22fc5388 UKK |
1035 | net_err_ratelimited("DHCP/BOOTP: Reply not for us on %s, op[%x] xid[%x]\n", |
1036 | d->dev->name, b->op, b->xid); | |
1da177e4 LT |
1037 | goto drop_unlock; |
1038 | } | |
1039 | ||
1040 | /* Parse extensions */ | |
1041 | if (ext_len >= 4 && | |
1042 | !memcmp(b->exten, ic_bootp_cookie, 4)) { /* Check magic cookie */ | |
e905a9ed | 1043 | u8 *end = (u8 *) b + ntohs(b->iph.tot_len); |
1da177e4 LT |
1044 | u8 *ext; |
1045 | ||
1046 | #ifdef IPCONFIG_DHCP | |
1047 | if (ic_proto_enabled & IC_USE_DHCP) { | |
5a874db4 | 1048 | __be32 server_id = NONE; |
1da177e4 LT |
1049 | int mt = 0; |
1050 | ||
1051 | ext = &b->exten[4]; | |
1052 | while (ext < end && *ext != 0xff) { | |
1053 | u8 *opt = ext++; | |
1054 | if (*opt == 0) /* Padding */ | |
1055 | continue; | |
1056 | ext += *ext + 1; | |
1057 | if (ext >= end) | |
1058 | break; | |
1059 | switch (*opt) { | |
1060 | case 53: /* Message type */ | |
1061 | if (opt[1]) | |
1062 | mt = opt[2]; | |
1063 | break; | |
1064 | case 54: /* Server ID (IP address) */ | |
1065 | if (opt[1] >= 4) | |
1066 | memcpy(&server_id, opt + 2, 4); | |
1067 | break; | |
3ff50b79 | 1068 | } |
1da177e4 LT |
1069 | } |
1070 | ||
22fc5388 | 1071 | pr_debug("DHCP: Got message type %d (%s)\n", mt, d->dev->name); |
1da177e4 LT |
1072 | |
1073 | switch (mt) { | |
1074 | case DHCPOFFER: | |
1075 | /* While in the process of accepting one offer, | |
1076 | * ignore all others. | |
1077 | */ | |
5a874db4 | 1078 | if (ic_myaddr != NONE) |
1da177e4 LT |
1079 | goto drop_unlock; |
1080 | ||
1081 | /* Let's accept that offer. */ | |
1082 | ic_myaddr = b->your_ip; | |
1083 | ic_servaddr = server_id; | |
09605cc1 BS |
1084 | pr_debug("DHCP: Offered address %pI4 by server %pI4\n", |
1085 | &ic_myaddr, &b->iph.saddr); | |
1da177e4 LT |
1086 | /* The DHCP indicated server address takes |
1087 | * precedence over the bootp header one if | |
1088 | * they are different. | |
1089 | */ | |
5a874db4 | 1090 | if ((server_id != NONE) && |
1da177e4 LT |
1091 | (b->server_ip != server_id)) |
1092 | b->server_ip = ic_servaddr; | |
1093 | break; | |
1094 | ||
1095 | case DHCPACK: | |
1096 | if (memcmp(dev->dev_addr, b->hw_addr, dev->addr_len) != 0) | |
1097 | goto drop_unlock; | |
1098 | ||
1099 | /* Yeah! */ | |
1100 | break; | |
1101 | ||
1102 | default: | |
1103 | /* Urque. Forget it*/ | |
5a874db4 AV |
1104 | ic_myaddr = NONE; |
1105 | ic_servaddr = NONE; | |
1da177e4 | 1106 | goto drop_unlock; |
3ff50b79 | 1107 | } |
1da177e4 LT |
1108 | |
1109 | ic_dhcp_msgtype = mt; | |
1110 | ||
1111 | } | |
1112 | #endif /* IPCONFIG_DHCP */ | |
1113 | ||
1114 | ext = &b->exten[4]; | |
1115 | while (ext < end && *ext != 0xff) { | |
1116 | u8 *opt = ext++; | |
1117 | if (*opt == 0) /* Padding */ | |
1118 | continue; | |
1119 | ext += *ext + 1; | |
1120 | if (ext < end) | |
1121 | ic_do_bootp_ext(opt); | |
1122 | } | |
1123 | } | |
1124 | ||
1125 | /* We have a winner! */ | |
2647cffb | 1126 | ic_dev = d; |
1da177e4 LT |
1127 | ic_myaddr = b->your_ip; |
1128 | ic_servaddr = b->server_ip; | |
9dd4a13a | 1129 | ic_addrservaddr = b->iph.saddr; |
5a874db4 | 1130 | if (ic_gateway == NONE && b->relay_ip) |
1da177e4 | 1131 | ic_gateway = b->relay_ip; |
5a874db4 | 1132 | if (ic_nameservers[0] == NONE) |
1da177e4 LT |
1133 | ic_nameservers[0] = ic_servaddr; |
1134 | ic_got_reply = IC_BOOTP; | |
1135 | ||
1136 | drop_unlock: | |
1137 | /* Show's over. Nothing to see here. */ | |
1138 | spin_unlock(&ic_recv_lock); | |
1139 | ||
1140 | drop: | |
1141 | /* Throw the packet out. */ | |
1142 | kfree_skb(skb); | |
1143 | ||
1144 | return 0; | |
e905a9ed | 1145 | } |
1da177e4 LT |
1146 | |
1147 | ||
1148 | #endif | |
1149 | ||
1150 | ||
1151 | /* | |
1152 | * Dynamic IP configuration -- DHCP, BOOTP, RARP. | |
1153 | */ | |
1154 | ||
1155 | #ifdef IPCONFIG_DYNAMIC | |
1156 | ||
1157 | static int __init ic_dynamic(void) | |
1158 | { | |
1159 | int retries; | |
1160 | struct ic_device *d; | |
1161 | unsigned long start_jiffies, timeout, jiff; | |
1162 | int do_bootp = ic_proto_have_if & IC_BOOTP; | |
1163 | int do_rarp = ic_proto_have_if & IC_RARP; | |
1164 | ||
1165 | /* | |
1166 | * If none of DHCP/BOOTP/RARP was selected, return with an error. | |
1167 | * This routine gets only called when some pieces of information | |
1168 | * are missing, and without DHCP/BOOTP/RARP we are unable to get it. | |
1169 | */ | |
1170 | if (!ic_proto_enabled) { | |
058bd4d2 | 1171 | pr_err("IP-Config: Incomplete network configuration information\n"); |
1da177e4 LT |
1172 | return -1; |
1173 | } | |
1174 | ||
1175 | #ifdef IPCONFIG_BOOTP | |
1176 | if ((ic_proto_enabled ^ ic_proto_have_if) & IC_BOOTP) | |
058bd4d2 | 1177 | pr_err("DHCP/BOOTP: No suitable device found\n"); |
1da177e4 LT |
1178 | #endif |
1179 | #ifdef IPCONFIG_RARP | |
1180 | if ((ic_proto_enabled ^ ic_proto_have_if) & IC_RARP) | |
058bd4d2 | 1181 | pr_err("RARP: No suitable device found\n"); |
1da177e4 LT |
1182 | #endif |
1183 | ||
1184 | if (!ic_proto_have_if) | |
1185 | /* Error message already printed */ | |
1186 | return -1; | |
1187 | ||
1188 | /* | |
1189 | * Setup protocols | |
1190 | */ | |
1191 | #ifdef IPCONFIG_BOOTP | |
1192 | if (do_bootp) | |
1193 | ic_bootp_init(); | |
1194 | #endif | |
1195 | #ifdef IPCONFIG_RARP | |
1196 | if (do_rarp) | |
1197 | ic_rarp_init(); | |
1198 | #endif | |
1199 | ||
1200 | /* | |
1201 | * Send requests and wait, until we get an answer. This loop | |
1202 | * seems to be a terrible waste of CPU time, but actually there is | |
1203 | * only one process running at all, so we don't need to use any | |
1204 | * scheduler functions. | |
e905a9ed | 1205 | * [Actually we could now, but the nothing else running note still |
1da177e4 LT |
1206 | * applies.. - AC] |
1207 | */ | |
058bd4d2 JP |
1208 | pr_notice("Sending %s%s%s requests .", |
1209 | do_bootp | |
1210 | ? ((ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP") : "", | |
1211 | (do_bootp && do_rarp) ? " and " : "", | |
1212 | do_rarp ? "RARP" : ""); | |
1da177e4 LT |
1213 | |
1214 | start_jiffies = jiffies; | |
1215 | d = ic_first_dev; | |
1216 | retries = CONF_SEND_RETRIES; | |
1217 | get_random_bytes(&timeout, sizeof(timeout)); | |
95c96174 | 1218 | timeout = CONF_BASE_TIMEOUT + (timeout % (unsigned int) CONF_TIMEOUT_RANDOM); |
132adf54 | 1219 | for (;;) { |
405fd707 | 1220 | #ifdef IPCONFIG_BOOTP |
1da177e4 LT |
1221 | if (do_bootp && (d->able & IC_BOOTP)) |
1222 | ic_bootp_send_if(d, jiffies - start_jiffies); | |
1223 | #endif | |
1224 | #ifdef IPCONFIG_RARP | |
1225 | if (do_rarp && (d->able & IC_RARP)) | |
1226 | ic_rarp_send_if(d); | |
1227 | #endif | |
1228 | ||
e0688534 UKK |
1229 | if (!d->next) { |
1230 | jiff = jiffies + timeout; | |
1231 | while (time_before(jiffies, jiff) && !ic_got_reply) | |
1232 | schedule_timeout_uninterruptible(1); | |
1233 | } | |
1da177e4 LT |
1234 | #ifdef IPCONFIG_DHCP |
1235 | /* DHCP isn't done until we get a DHCPACK. */ | |
9d4fb27d JP |
1236 | if ((ic_got_reply & IC_BOOTP) && |
1237 | (ic_proto_enabled & IC_USE_DHCP) && | |
1238 | ic_dhcp_msgtype != DHCPACK) { | |
1da177e4 | 1239 | ic_got_reply = 0; |
2647cffb UKK |
1240 | /* continue on device that got the reply */ |
1241 | d = ic_dev; | |
6c1c36b0 | 1242 | pr_cont(","); |
1da177e4 LT |
1243 | continue; |
1244 | } | |
1245 | #endif /* IPCONFIG_DHCP */ | |
1246 | ||
1247 | if (ic_got_reply) { | |
6c1c36b0 | 1248 | pr_cont(" OK\n"); |
1da177e4 LT |
1249 | break; |
1250 | } | |
1251 | ||
1252 | if ((d = d->next)) | |
1253 | continue; | |
1254 | ||
1255 | if (! --retries) { | |
6c1c36b0 | 1256 | pr_cont(" timed out!\n"); |
1da177e4 LT |
1257 | break; |
1258 | } | |
1259 | ||
1260 | d = ic_first_dev; | |
1261 | ||
1262 | timeout = timeout CONF_TIMEOUT_MULT; | |
1263 | if (timeout > CONF_TIMEOUT_MAX) | |
1264 | timeout = CONF_TIMEOUT_MAX; | |
1265 | ||
6c1c36b0 | 1266 | pr_cont("."); |
1da177e4 LT |
1267 | } |
1268 | ||
1269 | #ifdef IPCONFIG_BOOTP | |
1270 | if (do_bootp) | |
1271 | ic_bootp_cleanup(); | |
1272 | #endif | |
1273 | #ifdef IPCONFIG_RARP | |
1274 | if (do_rarp) | |
1275 | ic_rarp_cleanup(); | |
1276 | #endif | |
1277 | ||
7a1af5d7 | 1278 | if (!ic_got_reply) { |
5a874db4 | 1279 | ic_myaddr = NONE; |
1da177e4 | 1280 | return -1; |
7a1af5d7 | 1281 | } |
1da177e4 | 1282 | |
6c1c36b0 | 1283 | pr_info("IP-Config: Got %s answer from %pI4, my address is %pI4\n", |
e905a9ed | 1284 | ((ic_got_reply & IC_RARP) ? "RARP" |
09605cc1 | 1285 | : (ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP"), |
6c1c36b0 | 1286 | &ic_addrservaddr, &ic_myaddr); |
1da177e4 LT |
1287 | |
1288 | return 0; | |
1289 | } | |
1290 | ||
1291 | #endif /* IPCONFIG_DYNAMIC */ | |
1292 | ||
1293 | #ifdef CONFIG_PROC_FS | |
289e1f4e AR |
1294 | /* proc_dir_entry for /proc/net/ipconfig */ |
1295 | static struct proc_dir_entry *ipconfig_dir; | |
1da177e4 | 1296 | |
c04d2cb2 | 1297 | /* Name servers: */ |
1da177e4 LT |
1298 | static int pnp_seq_show(struct seq_file *seq, void *v) |
1299 | { | |
1300 | int i; | |
1301 | ||
1302 | if (ic_proto_used & IC_PROTO) | |
1303 | seq_printf(seq, "#PROTO: %s\n", | |
1304 | (ic_proto_used & IC_RARP) ? "RARP" | |
1305 | : (ic_proto_used & IC_USE_DHCP) ? "DHCP" : "BOOTP"); | |
1306 | else | |
1307 | seq_puts(seq, "#MANUAL\n"); | |
1308 | ||
1309 | if (ic_domain[0]) | |
1310 | seq_printf(seq, | |
1311 | "domain %s\n", ic_domain); | |
1312 | for (i = 0; i < CONF_NAMESERVERS_MAX; i++) { | |
5a874db4 | 1313 | if (ic_nameservers[i] != NONE) |
673d57e7 HH |
1314 | seq_printf(seq, "nameserver %pI4\n", |
1315 | &ic_nameservers[i]); | |
1da177e4 | 1316 | } |
5a874db4 | 1317 | if (ic_servaddr != NONE) |
673d57e7 HH |
1318 | seq_printf(seq, "bootserver %pI4\n", |
1319 | &ic_servaddr); | |
1da177e4 LT |
1320 | return 0; |
1321 | } | |
1322 | ||
4d019b3f | 1323 | /* Create the /proc/net/ipconfig directory */ |
c04d2cb2 | 1324 | static int __init ipconfig_proc_net_init(void) |
4d019b3f CN |
1325 | { |
1326 | ipconfig_dir = proc_net_mkdir(&init_net, "ipconfig", init_net.proc_net); | |
1327 | if (!ipconfig_dir) | |
1328 | return -ENOMEM; | |
1329 | ||
1330 | return 0; | |
1331 | } | |
c04d2cb2 CN |
1332 | |
1333 | /* Create a new file under /proc/net/ipconfig */ | |
1334 | static int ipconfig_proc_net_create(const char *name, | |
1335 | const struct file_operations *fops) | |
1336 | { | |
1337 | char *pname; | |
1338 | struct proc_dir_entry *p; | |
1339 | ||
1340 | if (!ipconfig_dir) | |
1341 | return -ENOMEM; | |
1342 | ||
1343 | pname = kasprintf(GFP_KERNEL, "%s%s", "ipconfig/", name); | |
1344 | if (!pname) | |
1345 | return -ENOMEM; | |
1346 | ||
1347 | p = proc_create(pname, 0444, init_net.proc_net, fops); | |
1348 | kfree(pname); | |
1349 | if (!p) | |
1350 | return -ENOMEM; | |
1351 | ||
1352 | return 0; | |
1353 | } | |
1354 | ||
1355 | /* Write NTP server IP addresses to /proc/net/ipconfig/ntp_servers */ | |
1356 | static int ntp_servers_seq_show(struct seq_file *seq, void *v) | |
1357 | { | |
1358 | int i; | |
1359 | ||
1360 | for (i = 0; i < CONF_NTP_SERVERS_MAX; i++) { | |
1361 | if (ic_ntp_servers[i] != NONE) | |
1362 | seq_printf(seq, "%pI4\n", &ic_ntp_servers[i]); | |
1363 | } | |
1364 | return 0; | |
1365 | } | |
70f98d7c | 1366 | DEFINE_SHOW_ATTRIBUTE(ntp_servers_seq); |
1da177e4 LT |
1367 | #endif /* CONFIG_PROC_FS */ |
1368 | ||
1369 | /* | |
1370 | * Extract IP address from the parameter string if needed. Note that we | |
1371 | * need to have root_server_addr set _before_ IPConfig gets called as it | |
1372 | * can override it. | |
1373 | */ | |
5a874db4 | 1374 | __be32 __init root_nfs_parse_addr(char *name) |
1da177e4 | 1375 | { |
5a874db4 | 1376 | __be32 addr; |
1da177e4 LT |
1377 | int octets = 0; |
1378 | char *cp, *cq; | |
1379 | ||
1380 | cp = cq = name; | |
1381 | while (octets < 4) { | |
1382 | while (*cp >= '0' && *cp <= '9') | |
1383 | cp++; | |
1384 | if (cp == cq || cp - cq > 3) | |
1385 | break; | |
1386 | if (*cp == '.' || octets == 3) | |
1387 | octets++; | |
1388 | if (octets < 4) | |
1389 | cp++; | |
1390 | cq = cp; | |
1391 | } | |
1392 | if (octets == 4 && (*cp == ':' || *cp == '\0')) { | |
1393 | if (*cp == ':') | |
1394 | *cp++ = '\0'; | |
1395 | addr = in_aton(name); | |
1396 | memmove(name, cp, strlen(cp) + 1); | |
1397 | } else | |
5a874db4 | 1398 | addr = NONE; |
1da177e4 LT |
1399 | |
1400 | return addr; | |
1401 | } | |
1402 | ||
964ad81c DM |
1403 | #define DEVICE_WAIT_MAX 12 /* 12 seconds */ |
1404 | ||
1405 | static int __init wait_for_devices(void) | |
1406 | { | |
1407 | int i; | |
1408 | ||
964ad81c DM |
1409 | for (i = 0; i < DEVICE_WAIT_MAX; i++) { |
1410 | struct net_device *dev; | |
1411 | int found = 0; | |
1412 | ||
1413 | rtnl_lock(); | |
1414 | for_each_netdev(&init_net, dev) { | |
3fb72f1e | 1415 | if (ic_is_init_dev(dev)) { |
964ad81c DM |
1416 | found = 1; |
1417 | break; | |
1418 | } | |
1419 | } | |
1420 | rtnl_unlock(); | |
1421 | if (found) | |
1422 | return 0; | |
1423 | ssleep(1); | |
1424 | } | |
1425 | return -ENODEV; | |
1426 | } | |
1427 | ||
1da177e4 LT |
1428 | /* |
1429 | * IP Autoconfig dispatcher. | |
1430 | */ | |
1431 | ||
1432 | static int __init ip_auto_config(void) | |
1433 | { | |
5a874db4 | 1434 | __be32 addr; |
9d8dba6c BZ |
1435 | #ifdef IPCONFIG_DYNAMIC |
1436 | int retries = CONF_OPEN_RETRIES; | |
1437 | #endif | |
964ad81c | 1438 | int err; |
5e953778 | 1439 | unsigned int i; |
1da177e4 | 1440 | |
c04d2cb2 CN |
1441 | /* Initialise all name servers and NTP servers to NONE (but only if the |
1442 | * "ip=" or "nfsaddrs=" kernel command line parameters weren't decoded, | |
1443 | * otherwise we'll overwrite the IP addresses specified there) | |
300eec7c | 1444 | */ |
c04d2cb2 | 1445 | if (ic_set_manually == 0) { |
300eec7c | 1446 | ic_nameservers_predef(); |
c04d2cb2 CN |
1447 | ic_ntp_servers_predef(); |
1448 | } | |
300eec7c | 1449 | |
1da177e4 | 1450 | #ifdef CONFIG_PROC_FS |
3f3942ac | 1451 | proc_create_single("pnp", 0444, init_net.proc_net, pnp_seq_show); |
4d019b3f | 1452 | |
c04d2cb2 CN |
1453 | if (ipconfig_proc_net_init() == 0) |
1454 | ipconfig_proc_net_create("ntp_servers", &ntp_servers_seq_fops); | |
1da177e4 LT |
1455 | #endif /* CONFIG_PROC_FS */ |
1456 | ||
1457 | if (!ic_enable) | |
1458 | return 0; | |
1459 | ||
09605cc1 | 1460 | pr_debug("IP-Config: Entered.\n"); |
1da177e4 LT |
1461 | #ifdef IPCONFIG_DYNAMIC |
1462 | try_try_again: | |
1463 | #endif | |
964ad81c DM |
1464 | /* Wait for devices to appear */ |
1465 | err = wait_for_devices(); | |
1466 | if (err) | |
1467 | return err; | |
1da177e4 LT |
1468 | |
1469 | /* Setup all network devices */ | |
964ad81c DM |
1470 | err = ic_open_devs(); |
1471 | if (err) | |
1472 | return err; | |
1da177e4 LT |
1473 | |
1474 | /* Give drivers a chance to settle */ | |
3fb72f1e | 1475 | msleep(CONF_POST_OPEN); |
1da177e4 LT |
1476 | |
1477 | /* | |
1478 | * If the config information is insufficient (e.g., our IP address or | |
1479 | * IP address of the boot server is missing or we have multiple network | |
1480 | * interfaces and no default was set), use BOOTP or RARP to get the | |
1481 | * missing values. | |
1482 | */ | |
5a874db4 | 1483 | if (ic_myaddr == NONE || |
1da177e4 | 1484 | #ifdef CONFIG_ROOT_NFS |
9d4fb27d JP |
1485 | (root_server_addr == NONE && |
1486 | ic_servaddr == NONE && | |
1487 | ROOT_DEV == Root_NFS) || | |
1da177e4 LT |
1488 | #endif |
1489 | ic_first_dev->next) { | |
1490 | #ifdef IPCONFIG_DYNAMIC | |
1da177e4 LT |
1491 | if (ic_dynamic() < 0) { |
1492 | ic_close_devs(); | |
1493 | ||
1494 | /* | |
1495 | * I don't know why, but sometimes the | |
1496 | * eepro100 driver (at least) gets upset and | |
1497 | * doesn't work the first time it's opened. | |
1498 | * But then if you close it and reopen it, it | |
1499 | * works just fine. So we need to try that at | |
1500 | * least once before giving up. | |
1501 | * | |
1502 | * Also, if the root will be NFS-mounted, we | |
1503 | * have nowhere to go if DHCP fails. So we | |
1504 | * just have to keep trying forever. | |
1505 | * | |
1506 | * -- Chip | |
1507 | */ | |
1508 | #ifdef CONFIG_ROOT_NFS | |
1509 | if (ROOT_DEV == Root_NFS) { | |
058bd4d2 | 1510 | pr_err("IP-Config: Retrying forever (NFS root)...\n"); |
1da177e4 LT |
1511 | goto try_try_again; |
1512 | } | |
1513 | #endif | |
1514 | ||
1515 | if (--retries) { | |
058bd4d2 | 1516 | pr_err("IP-Config: Reopening network devices...\n"); |
1da177e4 LT |
1517 | goto try_try_again; |
1518 | } | |
1519 | ||
1520 | /* Oh, well. At least we tried. */ | |
058bd4d2 | 1521 | pr_err("IP-Config: Auto-configuration of network failed\n"); |
1da177e4 LT |
1522 | return -1; |
1523 | } | |
1524 | #else /* !DYNAMIC */ | |
058bd4d2 | 1525 | pr_err("IP-Config: Incomplete network configuration information\n"); |
1da177e4 LT |
1526 | ic_close_devs(); |
1527 | return -1; | |
1528 | #endif /* IPCONFIG_DYNAMIC */ | |
1529 | } else { | |
1530 | /* Device selected manually or only one device -> use it */ | |
2647cffb | 1531 | ic_dev = ic_first_dev; |
1da177e4 LT |
1532 | } |
1533 | ||
1534 | addr = root_nfs_parse_addr(root_server_path); | |
5a874db4 | 1535 | if (root_server_addr == NONE) |
1da177e4 LT |
1536 | root_server_addr = addr; |
1537 | ||
1538 | /* | |
25985edc | 1539 | * Use defaults wherever applicable. |
1da177e4 LT |
1540 | */ |
1541 | if (ic_defaults() < 0) | |
1542 | return -1; | |
1543 | ||
1da177e4 LT |
1544 | /* |
1545 | * Record which protocol was actually used. | |
1546 | */ | |
1547 | #ifdef IPCONFIG_DYNAMIC | |
1548 | ic_proto_used = ic_got_reply | (ic_proto_enabled & IC_USE_DHCP); | |
1549 | #endif | |
1550 | ||
1551 | #ifndef IPCONFIG_SILENT | |
1552 | /* | |
1553 | * Clue in the operator. | |
1554 | */ | |
058bd4d2 | 1555 | pr_info("IP-Config: Complete:\n"); |
9ecd1c3d CF |
1556 | |
1557 | pr_info(" device=%s, hwaddr=%*phC, ipaddr=%pI4, mask=%pI4, gw=%pI4\n", | |
2647cffb | 1558 | ic_dev->dev->name, ic_dev->dev->addr_len, ic_dev->dev->dev_addr, |
9ecd1c3d | 1559 | &ic_myaddr, &ic_netmask, &ic_gateway); |
058bd4d2 JP |
1560 | pr_info(" host=%s, domain=%s, nis-domain=%s\n", |
1561 | utsname()->nodename, ic_domain, utsname()->domainname); | |
1562 | pr_info(" bootserver=%pI4, rootserver=%pI4, rootpath=%s", | |
1563 | &ic_servaddr, &root_server_addr, root_server_path); | |
9643f455 | 1564 | if (ic_dev_mtu) |
058bd4d2 | 1565 | pr_cont(", mtu=%d", ic_dev_mtu); |
e18bdc83 CN |
1566 | /* Name servers (if any): */ |
1567 | for (i = 0; i < CONF_NAMESERVERS_MAX; i++) { | |
5e953778 | 1568 | if (ic_nameservers[i] != NONE) { |
e18bdc83 CN |
1569 | if (i == 0) |
1570 | pr_info(" nameserver%u=%pI4", | |
1571 | i, &ic_nameservers[i]); | |
1572 | else | |
1573 | pr_cont(", nameserver%u=%pI4", | |
1574 | i, &ic_nameservers[i]); | |
5e953778 | 1575 | } |
e18bdc83 CN |
1576 | if (i + 1 == CONF_NAMESERVERS_MAX) |
1577 | pr_cont("\n"); | |
1578 | } | |
c04d2cb2 CN |
1579 | /* NTP servers (if any): */ |
1580 | for (i = 0; i < CONF_NTP_SERVERS_MAX; i++) { | |
1581 | if (ic_ntp_servers[i] != NONE) { | |
1582 | if (i == 0) | |
1583 | pr_info(" ntpserver%u=%pI4", | |
1584 | i, &ic_ntp_servers[i]); | |
1585 | else | |
1586 | pr_cont(", ntpserver%u=%pI4", | |
1587 | i, &ic_ntp_servers[i]); | |
1588 | } | |
1589 | if (i + 1 == CONF_NTP_SERVERS_MAX) | |
1590 | pr_cont("\n"); | |
1591 | } | |
1da177e4 LT |
1592 | #endif /* !SILENT */ |
1593 | ||
9c706a49 UKK |
1594 | /* |
1595 | * Close all network devices except the device we've | |
1596 | * autoconfigured and set up routes. | |
1597 | */ | |
9c706a49 | 1598 | if (ic_setup_if() < 0 || ic_setup_routes() < 0) |
d2d371ae TR |
1599 | err = -1; |
1600 | else | |
1601 | err = 0; | |
9c706a49 | 1602 | |
d2d371ae | 1603 | ic_close_devs(); |
9c706a49 | 1604 | |
d2d371ae | 1605 | return err; |
1da177e4 LT |
1606 | } |
1607 | ||
1608 | late_initcall(ip_auto_config); | |
1609 | ||
1610 | ||
1611 | /* | |
1612 | * Decode any IP configuration options in the "ip=" or "nfsaddrs=" kernel | |
dc7a0816 | 1613 | * command line parameter. See Documentation/filesystems/nfs/nfsroot.txt. |
1da177e4 LT |
1614 | */ |
1615 | static int __init ic_proto_name(char *name) | |
1616 | { | |
1617 | if (!strcmp(name, "on") || !strcmp(name, "any")) { | |
1618 | return 1; | |
1619 | } | |
a6c05c3d | 1620 | if (!strcmp(name, "off") || !strcmp(name, "none")) { |
92ffb85d | 1621 | return 0; |
a6c05c3d | 1622 | } |
1da177e4 | 1623 | #ifdef CONFIG_IP_PNP_DHCP |
26fb342c LR |
1624 | else if (!strncmp(name, "dhcp", 4)) { |
1625 | char *client_id; | |
1626 | ||
1da177e4 | 1627 | ic_proto_enabled &= ~IC_RARP; |
26fb342c LR |
1628 | client_id = strstr(name, "dhcp,"); |
1629 | if (client_id) { | |
1630 | char *v; | |
1631 | ||
1632 | client_id = client_id + 5; | |
1633 | v = strchr(client_id, ','); | |
1634 | if (!v) | |
1635 | return 1; | |
1636 | *v = 0; | |
1637 | if (kstrtou8(client_id, 0, dhcp_client_identifier)) | |
09605cc1 | 1638 | pr_debug("DHCP: Invalid client identifier type\n"); |
26fb342c LR |
1639 | strncpy(dhcp_client_identifier + 1, v + 1, 251); |
1640 | *v = ','; | |
1641 | } | |
1da177e4 LT |
1642 | return 1; |
1643 | } | |
1644 | #endif | |
1645 | #ifdef CONFIG_IP_PNP_BOOTP | |
1646 | else if (!strcmp(name, "bootp")) { | |
1647 | ic_proto_enabled &= ~(IC_RARP | IC_USE_DHCP); | |
1648 | return 1; | |
1649 | } | |
1650 | #endif | |
1651 | #ifdef CONFIG_IP_PNP_RARP | |
1652 | else if (!strcmp(name, "rarp")) { | |
1653 | ic_proto_enabled &= ~(IC_BOOTP | IC_USE_DHCP); | |
1654 | return 1; | |
1655 | } | |
1656 | #endif | |
1657 | #ifdef IPCONFIG_DYNAMIC | |
1658 | else if (!strcmp(name, "both")) { | |
1659 | ic_proto_enabled &= ~IC_USE_DHCP; /* backward compat :-( */ | |
1660 | return 1; | |
1661 | } | |
1662 | #endif | |
1663 | return 0; | |
1664 | } | |
1665 | ||
1666 | static int __init ip_auto_config_setup(char *addrs) | |
1667 | { | |
1668 | char *cp, *ip, *dp; | |
1669 | int num = 0; | |
1670 | ||
1671 | ic_set_manually = 1; | |
9cecd07c | 1672 | ic_enable = 1; |
1da177e4 | 1673 | |
92ffb85d AW |
1674 | /* |
1675 | * If any dhcp, bootp etc options are set, leave autoconfig on | |
1676 | * and skip the below static IP processing. | |
1677 | */ | |
1da177e4 LT |
1678 | if (ic_proto_name(addrs)) |
1679 | return 1; | |
1680 | ||
92ffb85d AW |
1681 | /* If no static IP is given, turn off autoconfig and bail. */ |
1682 | if (*addrs == 0 || | |
1683 | strcmp(addrs, "off") == 0 || | |
1684 | strcmp(addrs, "none") == 0) { | |
1685 | ic_enable = 0; | |
1686 | return 1; | |
1687 | } | |
1688 | ||
c04d2cb2 | 1689 | /* Initialise all name servers and NTP servers to NONE */ |
5e953778 | 1690 | ic_nameservers_predef(); |
c04d2cb2 | 1691 | ic_ntp_servers_predef(); |
5e953778 | 1692 | |
92ffb85d | 1693 | /* Parse string for static IP assignment. */ |
1da177e4 LT |
1694 | ip = addrs; |
1695 | while (ip && *ip) { | |
1696 | if ((cp = strchr(ip, ':'))) | |
1697 | *cp++ = '\0'; | |
1698 | if (strlen(ip) > 0) { | |
09605cc1 | 1699 | pr_debug("IP-Config: Parameter #%d: `%s'\n", num, ip); |
1da177e4 LT |
1700 | switch (num) { |
1701 | case 0: | |
e6f1cebf | 1702 | if ((ic_myaddr = in_aton(ip)) == ANY) |
5a874db4 | 1703 | ic_myaddr = NONE; |
1da177e4 LT |
1704 | break; |
1705 | case 1: | |
e6f1cebf | 1706 | if ((ic_servaddr = in_aton(ip)) == ANY) |
5a874db4 | 1707 | ic_servaddr = NONE; |
1da177e4 LT |
1708 | break; |
1709 | case 2: | |
e6f1cebf | 1710 | if ((ic_gateway = in_aton(ip)) == ANY) |
5a874db4 | 1711 | ic_gateway = NONE; |
1da177e4 LT |
1712 | break; |
1713 | case 3: | |
e6f1cebf | 1714 | if ((ic_netmask = in_aton(ip)) == ANY) |
5a874db4 | 1715 | ic_netmask = NONE; |
1da177e4 LT |
1716 | break; |
1717 | case 4: | |
1718 | if ((dp = strchr(ip, '.'))) { | |
1719 | *dp++ = '\0'; | |
e9ff3990 SH |
1720 | strlcpy(utsname()->domainname, dp, |
1721 | sizeof(utsname()->domainname)); | |
1da177e4 | 1722 | } |
e9ff3990 SH |
1723 | strlcpy(utsname()->nodename, ip, |
1724 | sizeof(utsname()->nodename)); | |
1da177e4 LT |
1725 | ic_host_name_set = 1; |
1726 | break; | |
1727 | case 5: | |
1728 | strlcpy(user_dev_name, ip, sizeof(user_dev_name)); | |
1729 | break; | |
1730 | case 6: | |
92ffb85d AW |
1731 | if (ic_proto_name(ip) == 0 && |
1732 | ic_myaddr == NONE) { | |
1733 | ic_enable = 0; | |
1734 | } | |
1da177e4 | 1735 | break; |
5e953778 CF |
1736 | case 7: |
1737 | if (CONF_NAMESERVERS_MAX >= 1) { | |
1738 | ic_nameservers[0] = in_aton(ip); | |
1739 | if (ic_nameservers[0] == ANY) | |
1740 | ic_nameservers[0] = NONE; | |
1741 | } | |
1742 | break; | |
1743 | case 8: | |
1744 | if (CONF_NAMESERVERS_MAX >= 2) { | |
1745 | ic_nameservers[1] = in_aton(ip); | |
1746 | if (ic_nameservers[1] == ANY) | |
1747 | ic_nameservers[1] = NONE; | |
1748 | } | |
1749 | break; | |
c04d2cb2 CN |
1750 | case 9: |
1751 | if (CONF_NTP_SERVERS_MAX >= 1) { | |
1752 | ic_ntp_servers[0] = in_aton(ip); | |
1753 | if (ic_ntp_servers[0] == ANY) | |
1754 | ic_ntp_servers[0] = NONE; | |
1755 | } | |
1756 | break; | |
1da177e4 LT |
1757 | } |
1758 | } | |
1759 | ip = cp; | |
1760 | num++; | |
1761 | } | |
1762 | ||
1763 | return 1; | |
1764 | } | |
b37f4d7b | 1765 | __setup("ip=", ip_auto_config_setup); |
1da177e4 LT |
1766 | |
1767 | static int __init nfsaddrs_config_setup(char *addrs) | |
1768 | { | |
1769 | return ip_auto_config_setup(addrs); | |
1770 | } | |
b37f4d7b | 1771 | __setup("nfsaddrs=", nfsaddrs_config_setup); |
1da177e4 | 1772 | |
62013dbb RJ |
1773 | static int __init vendor_class_identifier_setup(char *addrs) |
1774 | { | |
1775 | if (strlcpy(vendor_class_identifier, addrs, | |
1776 | sizeof(vendor_class_identifier)) | |
1777 | >= sizeof(vendor_class_identifier)) | |
09605cc1 | 1778 | pr_warn("DHCP: vendorclass too long, truncated to \"%s\"\n", |
058bd4d2 | 1779 | vendor_class_identifier); |
62013dbb RJ |
1780 | return 1; |
1781 | } | |
62013dbb | 1782 | __setup("dhcpclass=", vendor_class_identifier_setup); |