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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * NET3 IP device support routines. | |
3 | * | |
4 | * Version: $Id: devinet.c,v 1.44 2001/10/31 21:55:54 davem Exp $ | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * Derived from the IP parts of dev.c 1.0.19 | |
02c30a84 | 12 | * Authors: Ross Biro |
1da177e4 LT |
13 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
14 | * Mark Evans, <evansmp@uhura.aston.ac.uk> | |
15 | * | |
16 | * Additional Authors: | |
17 | * Alan Cox, <gw4pts@gw4pts.ampr.org> | |
18 | * Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
19 | * | |
20 | * Changes: | |
21 | * Alexey Kuznetsov: pa_* fields are replaced with ifaddr | |
22 | * lists. | |
23 | * Cyrus Durgin: updated for kmod | |
24 | * Matthias Andree: in devinet_ioctl, compare label and | |
25 | * address (4.4BSD alias style support), | |
26 | * fall back to comparing just the label | |
27 | * if no match found. | |
28 | */ | |
29 | ||
1da177e4 LT |
30 | |
31 | #include <asm/uaccess.h> | |
32 | #include <asm/system.h> | |
33 | #include <linux/bitops.h> | |
4fc268d2 | 34 | #include <linux/capability.h> |
1da177e4 LT |
35 | #include <linux/module.h> |
36 | #include <linux/types.h> | |
37 | #include <linux/kernel.h> | |
1da177e4 LT |
38 | #include <linux/string.h> |
39 | #include <linux/mm.h> | |
40 | #include <linux/socket.h> | |
41 | #include <linux/sockios.h> | |
42 | #include <linux/in.h> | |
43 | #include <linux/errno.h> | |
44 | #include <linux/interrupt.h> | |
1823730f | 45 | #include <linux/if_addr.h> |
1da177e4 LT |
46 | #include <linux/if_ether.h> |
47 | #include <linux/inet.h> | |
48 | #include <linux/netdevice.h> | |
49 | #include <linux/etherdevice.h> | |
50 | #include <linux/skbuff.h> | |
1da177e4 LT |
51 | #include <linux/init.h> |
52 | #include <linux/notifier.h> | |
53 | #include <linux/inetdevice.h> | |
54 | #include <linux/igmp.h> | |
55 | #ifdef CONFIG_SYSCTL | |
56 | #include <linux/sysctl.h> | |
57 | #endif | |
58 | #include <linux/kmod.h> | |
59 | ||
14c85021 | 60 | #include <net/arp.h> |
1da177e4 LT |
61 | #include <net/ip.h> |
62 | #include <net/route.h> | |
63 | #include <net/ip_fib.h> | |
63f3444f | 64 | #include <net/rtnetlink.h> |
1da177e4 LT |
65 | |
66 | struct ipv4_devconf ipv4_devconf = { | |
42f811b8 HX |
67 | .data = { |
68 | [NET_IPV4_CONF_ACCEPT_REDIRECTS - 1] = 1, | |
69 | [NET_IPV4_CONF_SEND_REDIRECTS - 1] = 1, | |
70 | [NET_IPV4_CONF_SECURE_REDIRECTS - 1] = 1, | |
71 | [NET_IPV4_CONF_SHARED_MEDIA - 1] = 1, | |
72 | }, | |
1da177e4 LT |
73 | }; |
74 | ||
75 | static struct ipv4_devconf ipv4_devconf_dflt = { | |
42f811b8 HX |
76 | .data = { |
77 | [NET_IPV4_CONF_ACCEPT_REDIRECTS - 1] = 1, | |
78 | [NET_IPV4_CONF_SEND_REDIRECTS - 1] = 1, | |
79 | [NET_IPV4_CONF_SECURE_REDIRECTS - 1] = 1, | |
80 | [NET_IPV4_CONF_SHARED_MEDIA - 1] = 1, | |
81 | [NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE - 1] = 1, | |
82 | }, | |
1da177e4 LT |
83 | }; |
84 | ||
42f811b8 HX |
85 | #define IPV4_DEVCONF_DFLT(attr) IPV4_DEVCONF(ipv4_devconf_dflt, attr) |
86 | ||
5c753978 TG |
87 | static struct nla_policy ifa_ipv4_policy[IFA_MAX+1] __read_mostly = { |
88 | [IFA_LOCAL] = { .type = NLA_U32 }, | |
89 | [IFA_ADDRESS] = { .type = NLA_U32 }, | |
90 | [IFA_BROADCAST] = { .type = NLA_U32 }, | |
91 | [IFA_ANYCAST] = { .type = NLA_U32 }, | |
5176f91e | 92 | [IFA_LABEL] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, |
5c753978 TG |
93 | }; |
94 | ||
d6062cbb | 95 | static void rtmsg_ifa(int event, struct in_ifaddr *, struct nlmsghdr *, u32); |
1da177e4 | 96 | |
e041c683 | 97 | static BLOCKING_NOTIFIER_HEAD(inetaddr_chain); |
1da177e4 LT |
98 | static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
99 | int destroy); | |
100 | #ifdef CONFIG_SYSCTL | |
101 | static void devinet_sysctl_register(struct in_device *in_dev, | |
102 | struct ipv4_devconf *p); | |
103 | static void devinet_sysctl_unregister(struct ipv4_devconf *p); | |
104 | #endif | |
105 | ||
106 | /* Locks all the inet devices. */ | |
107 | ||
108 | static struct in_ifaddr *inet_alloc_ifa(void) | |
109 | { | |
0da974f4 | 110 | struct in_ifaddr *ifa = kzalloc(sizeof(*ifa), GFP_KERNEL); |
1da177e4 LT |
111 | |
112 | if (ifa) { | |
1da177e4 LT |
113 | INIT_RCU_HEAD(&ifa->rcu_head); |
114 | } | |
115 | ||
116 | return ifa; | |
117 | } | |
118 | ||
119 | static void inet_rcu_free_ifa(struct rcu_head *head) | |
120 | { | |
121 | struct in_ifaddr *ifa = container_of(head, struct in_ifaddr, rcu_head); | |
122 | if (ifa->ifa_dev) | |
123 | in_dev_put(ifa->ifa_dev); | |
124 | kfree(ifa); | |
125 | } | |
126 | ||
127 | static inline void inet_free_ifa(struct in_ifaddr *ifa) | |
128 | { | |
129 | call_rcu(&ifa->rcu_head, inet_rcu_free_ifa); | |
130 | } | |
131 | ||
132 | void in_dev_finish_destroy(struct in_device *idev) | |
133 | { | |
134 | struct net_device *dev = idev->dev; | |
135 | ||
136 | BUG_TRAP(!idev->ifa_list); | |
137 | BUG_TRAP(!idev->mc_list); | |
138 | #ifdef NET_REFCNT_DEBUG | |
139 | printk(KERN_DEBUG "in_dev_finish_destroy: %p=%s\n", | |
140 | idev, dev ? dev->name : "NIL"); | |
141 | #endif | |
142 | dev_put(dev); | |
143 | if (!idev->dead) | |
144 | printk("Freeing alive in_device %p\n", idev); | |
145 | else { | |
146 | kfree(idev); | |
147 | } | |
148 | } | |
149 | ||
150 | struct in_device *inetdev_init(struct net_device *dev) | |
151 | { | |
152 | struct in_device *in_dev; | |
153 | ||
154 | ASSERT_RTNL(); | |
155 | ||
0da974f4 | 156 | in_dev = kzalloc(sizeof(*in_dev), GFP_KERNEL); |
1da177e4 LT |
157 | if (!in_dev) |
158 | goto out; | |
1da177e4 LT |
159 | INIT_RCU_HEAD(&in_dev->rcu_head); |
160 | memcpy(&in_dev->cnf, &ipv4_devconf_dflt, sizeof(in_dev->cnf)); | |
161 | in_dev->cnf.sysctl = NULL; | |
162 | in_dev->dev = dev; | |
163 | if ((in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl)) == NULL) | |
164 | goto out_kfree; | |
165 | /* Reference in_dev->dev */ | |
166 | dev_hold(dev); | |
167 | #ifdef CONFIG_SYSCTL | |
168 | neigh_sysctl_register(dev, in_dev->arp_parms, NET_IPV4, | |
169 | NET_IPV4_NEIGH, "ipv4", NULL, NULL); | |
170 | #endif | |
171 | ||
30c4cf57 | 172 | /* Account for reference dev->ip_ptr (below) */ |
1da177e4 | 173 | in_dev_hold(in_dev); |
1da177e4 LT |
174 | |
175 | #ifdef CONFIG_SYSCTL | |
176 | devinet_sysctl_register(in_dev, &in_dev->cnf); | |
177 | #endif | |
178 | ip_mc_init_dev(in_dev); | |
179 | if (dev->flags & IFF_UP) | |
180 | ip_mc_up(in_dev); | |
483479ec | 181 | |
30c4cf57 DS |
182 | /* we can receive as soon as ip_ptr is set -- do this last */ |
183 | rcu_assign_pointer(dev->ip_ptr, in_dev); | |
483479ec | 184 | out: |
1da177e4 LT |
185 | return in_dev; |
186 | out_kfree: | |
187 | kfree(in_dev); | |
188 | in_dev = NULL; | |
189 | goto out; | |
190 | } | |
191 | ||
192 | static void in_dev_rcu_put(struct rcu_head *head) | |
193 | { | |
194 | struct in_device *idev = container_of(head, struct in_device, rcu_head); | |
195 | in_dev_put(idev); | |
196 | } | |
197 | ||
198 | static void inetdev_destroy(struct in_device *in_dev) | |
199 | { | |
200 | struct in_ifaddr *ifa; | |
201 | struct net_device *dev; | |
202 | ||
203 | ASSERT_RTNL(); | |
204 | ||
205 | dev = in_dev->dev; | |
206 | if (dev == &loopback_dev) | |
207 | return; | |
208 | ||
209 | in_dev->dead = 1; | |
210 | ||
211 | ip_mc_destroy_dev(in_dev); | |
212 | ||
213 | while ((ifa = in_dev->ifa_list) != NULL) { | |
214 | inet_del_ifa(in_dev, &in_dev->ifa_list, 0); | |
215 | inet_free_ifa(ifa); | |
216 | } | |
217 | ||
218 | #ifdef CONFIG_SYSCTL | |
219 | devinet_sysctl_unregister(&in_dev->cnf); | |
220 | #endif | |
221 | ||
222 | dev->ip_ptr = NULL; | |
223 | ||
224 | #ifdef CONFIG_SYSCTL | |
225 | neigh_sysctl_unregister(in_dev->arp_parms); | |
226 | #endif | |
227 | neigh_parms_release(&arp_tbl, in_dev->arp_parms); | |
228 | arp_ifdown(dev); | |
229 | ||
230 | call_rcu(&in_dev->rcu_head, in_dev_rcu_put); | |
231 | } | |
232 | ||
ff428d72 | 233 | int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b) |
1da177e4 LT |
234 | { |
235 | rcu_read_lock(); | |
236 | for_primary_ifa(in_dev) { | |
237 | if (inet_ifa_match(a, ifa)) { | |
238 | if (!b || inet_ifa_match(b, ifa)) { | |
239 | rcu_read_unlock(); | |
240 | return 1; | |
241 | } | |
242 | } | |
243 | } endfor_ifa(in_dev); | |
244 | rcu_read_unlock(); | |
245 | return 0; | |
246 | } | |
247 | ||
d6062cbb TG |
248 | static void __inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
249 | int destroy, struct nlmsghdr *nlh, u32 pid) | |
1da177e4 | 250 | { |
8f937c60 | 251 | struct in_ifaddr *promote = NULL; |
0ff60a45 JHS |
252 | struct in_ifaddr *ifa, *ifa1 = *ifap; |
253 | struct in_ifaddr *last_prim = in_dev->ifa_list; | |
254 | struct in_ifaddr *prev_prom = NULL; | |
255 | int do_promote = IN_DEV_PROMOTE_SECONDARIES(in_dev); | |
1da177e4 LT |
256 | |
257 | ASSERT_RTNL(); | |
258 | ||
e905a9ed | 259 | /* 1. Deleting primary ifaddr forces deletion all secondaries |
8f937c60 HW |
260 | * unless alias promotion is set |
261 | **/ | |
1da177e4 LT |
262 | |
263 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY)) { | |
1da177e4 LT |
264 | struct in_ifaddr **ifap1 = &ifa1->ifa_next; |
265 | ||
266 | while ((ifa = *ifap1) != NULL) { | |
e905a9ed | 267 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) && |
0ff60a45 JHS |
268 | ifa1->ifa_scope <= ifa->ifa_scope) |
269 | last_prim = ifa; | |
270 | ||
1da177e4 LT |
271 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) || |
272 | ifa1->ifa_mask != ifa->ifa_mask || | |
273 | !inet_ifa_match(ifa1->ifa_address, ifa)) { | |
274 | ifap1 = &ifa->ifa_next; | |
0ff60a45 | 275 | prev_prom = ifa; |
1da177e4 LT |
276 | continue; |
277 | } | |
278 | ||
0ff60a45 | 279 | if (!do_promote) { |
8f937c60 | 280 | *ifap1 = ifa->ifa_next; |
1da177e4 | 281 | |
d6062cbb | 282 | rtmsg_ifa(RTM_DELADDR, ifa, nlh, pid); |
e041c683 AS |
283 | blocking_notifier_call_chain(&inetaddr_chain, |
284 | NETDEV_DOWN, ifa); | |
8f937c60 HW |
285 | inet_free_ifa(ifa); |
286 | } else { | |
287 | promote = ifa; | |
288 | break; | |
289 | } | |
1da177e4 LT |
290 | } |
291 | } | |
292 | ||
293 | /* 2. Unlink it */ | |
294 | ||
295 | *ifap = ifa1->ifa_next; | |
296 | ||
297 | /* 3. Announce address deletion */ | |
298 | ||
299 | /* Send message first, then call notifier. | |
300 | At first sight, FIB update triggered by notifier | |
301 | will refer to already deleted ifaddr, that could confuse | |
302 | netlink listeners. It is not true: look, gated sees | |
303 | that route deleted and if it still thinks that ifaddr | |
304 | is valid, it will try to restore deleted routes... Grr. | |
305 | So that, this order is correct. | |
306 | */ | |
d6062cbb | 307 | rtmsg_ifa(RTM_DELADDR, ifa1, nlh, pid); |
e041c683 | 308 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1); |
1da177e4 | 309 | |
0ff60a45 JHS |
310 | if (promote) { |
311 | ||
312 | if (prev_prom) { | |
313 | prev_prom->ifa_next = promote->ifa_next; | |
314 | promote->ifa_next = last_prim->ifa_next; | |
315 | last_prim->ifa_next = promote; | |
316 | } | |
8f937c60 | 317 | |
8f937c60 | 318 | promote->ifa_flags &= ~IFA_F_SECONDARY; |
d6062cbb | 319 | rtmsg_ifa(RTM_NEWADDR, promote, nlh, pid); |
e041c683 AS |
320 | blocking_notifier_call_chain(&inetaddr_chain, |
321 | NETDEV_UP, promote); | |
0ff60a45 JHS |
322 | for (ifa = promote->ifa_next; ifa; ifa = ifa->ifa_next) { |
323 | if (ifa1->ifa_mask != ifa->ifa_mask || | |
324 | !inet_ifa_match(ifa1->ifa_address, ifa)) | |
325 | continue; | |
326 | fib_add_ifaddr(ifa); | |
327 | } | |
328 | ||
329 | } | |
330 | if (destroy) { | |
331 | inet_free_ifa(ifa1); | |
332 | ||
333 | if (!in_dev->ifa_list) | |
334 | inetdev_destroy(in_dev); | |
8f937c60 | 335 | } |
1da177e4 LT |
336 | } |
337 | ||
d6062cbb TG |
338 | static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
339 | int destroy) | |
340 | { | |
341 | __inet_del_ifa(in_dev, ifap, destroy, NULL, 0); | |
342 | } | |
343 | ||
344 | static int __inet_insert_ifa(struct in_ifaddr *ifa, struct nlmsghdr *nlh, | |
345 | u32 pid) | |
1da177e4 LT |
346 | { |
347 | struct in_device *in_dev = ifa->ifa_dev; | |
348 | struct in_ifaddr *ifa1, **ifap, **last_primary; | |
349 | ||
350 | ASSERT_RTNL(); | |
351 | ||
352 | if (!ifa->ifa_local) { | |
353 | inet_free_ifa(ifa); | |
354 | return 0; | |
355 | } | |
356 | ||
357 | ifa->ifa_flags &= ~IFA_F_SECONDARY; | |
358 | last_primary = &in_dev->ifa_list; | |
359 | ||
360 | for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL; | |
361 | ifap = &ifa1->ifa_next) { | |
362 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY) && | |
363 | ifa->ifa_scope <= ifa1->ifa_scope) | |
364 | last_primary = &ifa1->ifa_next; | |
365 | if (ifa1->ifa_mask == ifa->ifa_mask && | |
366 | inet_ifa_match(ifa1->ifa_address, ifa)) { | |
367 | if (ifa1->ifa_local == ifa->ifa_local) { | |
368 | inet_free_ifa(ifa); | |
369 | return -EEXIST; | |
370 | } | |
371 | if (ifa1->ifa_scope != ifa->ifa_scope) { | |
372 | inet_free_ifa(ifa); | |
373 | return -EINVAL; | |
374 | } | |
375 | ifa->ifa_flags |= IFA_F_SECONDARY; | |
376 | } | |
377 | } | |
378 | ||
379 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) { | |
380 | net_srandom(ifa->ifa_local); | |
381 | ifap = last_primary; | |
382 | } | |
383 | ||
384 | ifa->ifa_next = *ifap; | |
385 | *ifap = ifa; | |
386 | ||
387 | /* Send message first, then call notifier. | |
388 | Notifier will trigger FIB update, so that | |
389 | listeners of netlink will know about new ifaddr */ | |
d6062cbb | 390 | rtmsg_ifa(RTM_NEWADDR, ifa, nlh, pid); |
e041c683 | 391 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
392 | |
393 | return 0; | |
394 | } | |
395 | ||
d6062cbb TG |
396 | static int inet_insert_ifa(struct in_ifaddr *ifa) |
397 | { | |
398 | return __inet_insert_ifa(ifa, NULL, 0); | |
399 | } | |
400 | ||
1da177e4 LT |
401 | static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa) |
402 | { | |
e5ed6399 | 403 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
404 | |
405 | ASSERT_RTNL(); | |
406 | ||
407 | if (!in_dev) { | |
408 | in_dev = inetdev_init(dev); | |
409 | if (!in_dev) { | |
410 | inet_free_ifa(ifa); | |
411 | return -ENOBUFS; | |
412 | } | |
413 | } | |
414 | if (ifa->ifa_dev != in_dev) { | |
415 | BUG_TRAP(!ifa->ifa_dev); | |
416 | in_dev_hold(in_dev); | |
417 | ifa->ifa_dev = in_dev; | |
418 | } | |
419 | if (LOOPBACK(ifa->ifa_local)) | |
420 | ifa->ifa_scope = RT_SCOPE_HOST; | |
421 | return inet_insert_ifa(ifa); | |
422 | } | |
423 | ||
424 | struct in_device *inetdev_by_index(int ifindex) | |
425 | { | |
426 | struct net_device *dev; | |
427 | struct in_device *in_dev = NULL; | |
428 | read_lock(&dev_base_lock); | |
429 | dev = __dev_get_by_index(ifindex); | |
430 | if (dev) | |
431 | in_dev = in_dev_get(dev); | |
432 | read_unlock(&dev_base_lock); | |
433 | return in_dev; | |
434 | } | |
435 | ||
436 | /* Called only from RTNL semaphored context. No locks. */ | |
437 | ||
60cad5da AV |
438 | struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, |
439 | __be32 mask) | |
1da177e4 LT |
440 | { |
441 | ASSERT_RTNL(); | |
442 | ||
443 | for_primary_ifa(in_dev) { | |
444 | if (ifa->ifa_mask == mask && inet_ifa_match(prefix, ifa)) | |
445 | return ifa; | |
446 | } endfor_ifa(in_dev); | |
447 | return NULL; | |
448 | } | |
449 | ||
450 | static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
451 | { | |
dfdd5fd4 | 452 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 | 453 | struct in_device *in_dev; |
dfdd5fd4 | 454 | struct ifaddrmsg *ifm; |
1da177e4 | 455 | struct in_ifaddr *ifa, **ifap; |
dfdd5fd4 | 456 | int err = -EINVAL; |
1da177e4 LT |
457 | |
458 | ASSERT_RTNL(); | |
459 | ||
dfdd5fd4 TG |
460 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy); |
461 | if (err < 0) | |
462 | goto errout; | |
463 | ||
464 | ifm = nlmsg_data(nlh); | |
465 | in_dev = inetdev_by_index(ifm->ifa_index); | |
466 | if (in_dev == NULL) { | |
467 | err = -ENODEV; | |
468 | goto errout; | |
469 | } | |
470 | ||
1da177e4 LT |
471 | __in_dev_put(in_dev); |
472 | ||
473 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; | |
474 | ifap = &ifa->ifa_next) { | |
dfdd5fd4 | 475 | if (tb[IFA_LOCAL] && |
a7a628c4 | 476 | ifa->ifa_local != nla_get_be32(tb[IFA_LOCAL])) |
dfdd5fd4 TG |
477 | continue; |
478 | ||
479 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) | |
1da177e4 | 480 | continue; |
dfdd5fd4 TG |
481 | |
482 | if (tb[IFA_ADDRESS] && | |
483 | (ifm->ifa_prefixlen != ifa->ifa_prefixlen || | |
a7a628c4 | 484 | !inet_ifa_match(nla_get_be32(tb[IFA_ADDRESS]), ifa))) |
dfdd5fd4 TG |
485 | continue; |
486 | ||
d6062cbb | 487 | __inet_del_ifa(in_dev, ifap, 1, nlh, NETLINK_CB(skb).pid); |
1da177e4 LT |
488 | return 0; |
489 | } | |
dfdd5fd4 TG |
490 | |
491 | err = -EADDRNOTAVAIL; | |
492 | errout: | |
493 | return err; | |
1da177e4 LT |
494 | } |
495 | ||
5c753978 | 496 | static struct in_ifaddr *rtm_to_ifaddr(struct nlmsghdr *nlh) |
1da177e4 | 497 | { |
5c753978 TG |
498 | struct nlattr *tb[IFA_MAX+1]; |
499 | struct in_ifaddr *ifa; | |
500 | struct ifaddrmsg *ifm; | |
1da177e4 LT |
501 | struct net_device *dev; |
502 | struct in_device *in_dev; | |
5c753978 | 503 | int err = -EINVAL; |
1da177e4 | 504 | |
5c753978 TG |
505 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy); |
506 | if (err < 0) | |
507 | goto errout; | |
1da177e4 | 508 | |
5c753978 | 509 | ifm = nlmsg_data(nlh); |
c4e38f41 EP |
510 | if (ifm->ifa_prefixlen > 32 || tb[IFA_LOCAL] == NULL) { |
511 | err = -EINVAL; | |
5c753978 | 512 | goto errout; |
c4e38f41 | 513 | } |
1da177e4 | 514 | |
5c753978 TG |
515 | dev = __dev_get_by_index(ifm->ifa_index); |
516 | if (dev == NULL) { | |
517 | err = -ENODEV; | |
518 | goto errout; | |
519 | } | |
1da177e4 | 520 | |
5c753978 TG |
521 | in_dev = __in_dev_get_rtnl(dev); |
522 | if (in_dev == NULL) { | |
1da177e4 | 523 | in_dev = inetdev_init(dev); |
5c753978 TG |
524 | if (in_dev == NULL) { |
525 | err = -ENOBUFS; | |
526 | goto errout; | |
527 | } | |
1da177e4 LT |
528 | } |
529 | ||
5c753978 TG |
530 | ifa = inet_alloc_ifa(); |
531 | if (ifa == NULL) { | |
532 | /* | |
533 | * A potential indev allocation can be left alive, it stays | |
534 | * assigned to its device and is destroy with it. | |
535 | */ | |
536 | err = -ENOBUFS; | |
537 | goto errout; | |
538 | } | |
539 | ||
540 | in_dev_hold(in_dev); | |
541 | ||
542 | if (tb[IFA_ADDRESS] == NULL) | |
543 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; | |
1da177e4 | 544 | |
1da177e4 LT |
545 | ifa->ifa_prefixlen = ifm->ifa_prefixlen; |
546 | ifa->ifa_mask = inet_make_mask(ifm->ifa_prefixlen); | |
1da177e4 LT |
547 | ifa->ifa_flags = ifm->ifa_flags; |
548 | ifa->ifa_scope = ifm->ifa_scope; | |
5c753978 TG |
549 | ifa->ifa_dev = in_dev; |
550 | ||
a7a628c4 AV |
551 | ifa->ifa_local = nla_get_be32(tb[IFA_LOCAL]); |
552 | ifa->ifa_address = nla_get_be32(tb[IFA_ADDRESS]); | |
5c753978 TG |
553 | |
554 | if (tb[IFA_BROADCAST]) | |
a7a628c4 | 555 | ifa->ifa_broadcast = nla_get_be32(tb[IFA_BROADCAST]); |
5c753978 TG |
556 | |
557 | if (tb[IFA_ANYCAST]) | |
a7a628c4 | 558 | ifa->ifa_anycast = nla_get_be32(tb[IFA_ANYCAST]); |
5c753978 TG |
559 | |
560 | if (tb[IFA_LABEL]) | |
561 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); | |
1da177e4 LT |
562 | else |
563 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
564 | ||
5c753978 TG |
565 | return ifa; |
566 | ||
567 | errout: | |
568 | return ERR_PTR(err); | |
569 | } | |
570 | ||
571 | static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
572 | { | |
573 | struct in_ifaddr *ifa; | |
574 | ||
575 | ASSERT_RTNL(); | |
576 | ||
577 | ifa = rtm_to_ifaddr(nlh); | |
578 | if (IS_ERR(ifa)) | |
579 | return PTR_ERR(ifa); | |
580 | ||
d6062cbb | 581 | return __inet_insert_ifa(ifa, nlh, NETLINK_CB(skb).pid); |
1da177e4 LT |
582 | } |
583 | ||
584 | /* | |
585 | * Determine a default network mask, based on the IP address. | |
586 | */ | |
587 | ||
714e85be | 588 | static __inline__ int inet_abc_len(__be32 addr) |
1da177e4 LT |
589 | { |
590 | int rc = -1; /* Something else, probably a multicast. */ | |
591 | ||
e905a9ed YH |
592 | if (ZERONET(addr)) |
593 | rc = 0; | |
1da177e4 | 594 | else { |
714e85be | 595 | __u32 haddr = ntohl(addr); |
1da177e4 | 596 | |
714e85be | 597 | if (IN_CLASSA(haddr)) |
1da177e4 | 598 | rc = 8; |
714e85be | 599 | else if (IN_CLASSB(haddr)) |
1da177e4 | 600 | rc = 16; |
714e85be | 601 | else if (IN_CLASSC(haddr)) |
1da177e4 LT |
602 | rc = 24; |
603 | } | |
604 | ||
e905a9ed | 605 | return rc; |
1da177e4 LT |
606 | } |
607 | ||
608 | ||
609 | int devinet_ioctl(unsigned int cmd, void __user *arg) | |
610 | { | |
611 | struct ifreq ifr; | |
612 | struct sockaddr_in sin_orig; | |
613 | struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr; | |
614 | struct in_device *in_dev; | |
615 | struct in_ifaddr **ifap = NULL; | |
616 | struct in_ifaddr *ifa = NULL; | |
617 | struct net_device *dev; | |
618 | char *colon; | |
619 | int ret = -EFAULT; | |
620 | int tryaddrmatch = 0; | |
621 | ||
622 | /* | |
623 | * Fetch the caller's info block into kernel space | |
624 | */ | |
625 | ||
626 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) | |
627 | goto out; | |
628 | ifr.ifr_name[IFNAMSIZ - 1] = 0; | |
629 | ||
630 | /* save original address for comparison */ | |
631 | memcpy(&sin_orig, sin, sizeof(*sin)); | |
632 | ||
633 | colon = strchr(ifr.ifr_name, ':'); | |
634 | if (colon) | |
635 | *colon = 0; | |
636 | ||
637 | #ifdef CONFIG_KMOD | |
638 | dev_load(ifr.ifr_name); | |
639 | #endif | |
640 | ||
132adf54 | 641 | switch (cmd) { |
1da177e4 LT |
642 | case SIOCGIFADDR: /* Get interface address */ |
643 | case SIOCGIFBRDADDR: /* Get the broadcast address */ | |
644 | case SIOCGIFDSTADDR: /* Get the destination address */ | |
645 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ | |
646 | /* Note that these ioctls will not sleep, | |
647 | so that we do not impose a lock. | |
648 | One day we will be forced to put shlock here (I mean SMP) | |
649 | */ | |
650 | tryaddrmatch = (sin_orig.sin_family == AF_INET); | |
651 | memset(sin, 0, sizeof(*sin)); | |
652 | sin->sin_family = AF_INET; | |
653 | break; | |
654 | ||
655 | case SIOCSIFFLAGS: | |
656 | ret = -EACCES; | |
657 | if (!capable(CAP_NET_ADMIN)) | |
658 | goto out; | |
659 | break; | |
660 | case SIOCSIFADDR: /* Set interface address (and family) */ | |
661 | case SIOCSIFBRDADDR: /* Set the broadcast address */ | |
662 | case SIOCSIFDSTADDR: /* Set the destination address */ | |
663 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ | |
664 | ret = -EACCES; | |
665 | if (!capable(CAP_NET_ADMIN)) | |
666 | goto out; | |
667 | ret = -EINVAL; | |
668 | if (sin->sin_family != AF_INET) | |
669 | goto out; | |
670 | break; | |
671 | default: | |
672 | ret = -EINVAL; | |
673 | goto out; | |
674 | } | |
675 | ||
676 | rtnl_lock(); | |
677 | ||
678 | ret = -ENODEV; | |
679 | if ((dev = __dev_get_by_name(ifr.ifr_name)) == NULL) | |
680 | goto done; | |
681 | ||
682 | if (colon) | |
683 | *colon = ':'; | |
684 | ||
e5ed6399 | 685 | if ((in_dev = __in_dev_get_rtnl(dev)) != NULL) { |
1da177e4 LT |
686 | if (tryaddrmatch) { |
687 | /* Matthias Andree */ | |
688 | /* compare label and address (4.4BSD style) */ | |
689 | /* note: we only do this for a limited set of ioctls | |
690 | and only if the original address family was AF_INET. | |
691 | This is checked above. */ | |
692 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; | |
693 | ifap = &ifa->ifa_next) { | |
694 | if (!strcmp(ifr.ifr_name, ifa->ifa_label) && | |
695 | sin_orig.sin_addr.s_addr == | |
696 | ifa->ifa_address) { | |
697 | break; /* found */ | |
698 | } | |
699 | } | |
700 | } | |
701 | /* we didn't get a match, maybe the application is | |
702 | 4.3BSD-style and passed in junk so we fall back to | |
703 | comparing just the label */ | |
704 | if (!ifa) { | |
705 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; | |
706 | ifap = &ifa->ifa_next) | |
707 | if (!strcmp(ifr.ifr_name, ifa->ifa_label)) | |
708 | break; | |
709 | } | |
710 | } | |
711 | ||
712 | ret = -EADDRNOTAVAIL; | |
713 | if (!ifa && cmd != SIOCSIFADDR && cmd != SIOCSIFFLAGS) | |
714 | goto done; | |
715 | ||
132adf54 | 716 | switch (cmd) { |
1da177e4 LT |
717 | case SIOCGIFADDR: /* Get interface address */ |
718 | sin->sin_addr.s_addr = ifa->ifa_local; | |
719 | goto rarok; | |
720 | ||
721 | case SIOCGIFBRDADDR: /* Get the broadcast address */ | |
722 | sin->sin_addr.s_addr = ifa->ifa_broadcast; | |
723 | goto rarok; | |
724 | ||
725 | case SIOCGIFDSTADDR: /* Get the destination address */ | |
726 | sin->sin_addr.s_addr = ifa->ifa_address; | |
727 | goto rarok; | |
728 | ||
729 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ | |
730 | sin->sin_addr.s_addr = ifa->ifa_mask; | |
731 | goto rarok; | |
732 | ||
733 | case SIOCSIFFLAGS: | |
734 | if (colon) { | |
735 | ret = -EADDRNOTAVAIL; | |
736 | if (!ifa) | |
737 | break; | |
738 | ret = 0; | |
739 | if (!(ifr.ifr_flags & IFF_UP)) | |
740 | inet_del_ifa(in_dev, ifap, 1); | |
741 | break; | |
742 | } | |
743 | ret = dev_change_flags(dev, ifr.ifr_flags); | |
744 | break; | |
745 | ||
746 | case SIOCSIFADDR: /* Set interface address (and family) */ | |
747 | ret = -EINVAL; | |
748 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) | |
749 | break; | |
750 | ||
751 | if (!ifa) { | |
752 | ret = -ENOBUFS; | |
753 | if ((ifa = inet_alloc_ifa()) == NULL) | |
754 | break; | |
755 | if (colon) | |
756 | memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ); | |
757 | else | |
758 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
759 | } else { | |
760 | ret = 0; | |
761 | if (ifa->ifa_local == sin->sin_addr.s_addr) | |
762 | break; | |
763 | inet_del_ifa(in_dev, ifap, 0); | |
764 | ifa->ifa_broadcast = 0; | |
765 | ifa->ifa_anycast = 0; | |
766 | } | |
767 | ||
768 | ifa->ifa_address = ifa->ifa_local = sin->sin_addr.s_addr; | |
769 | ||
770 | if (!(dev->flags & IFF_POINTOPOINT)) { | |
771 | ifa->ifa_prefixlen = inet_abc_len(ifa->ifa_address); | |
772 | ifa->ifa_mask = inet_make_mask(ifa->ifa_prefixlen); | |
773 | if ((dev->flags & IFF_BROADCAST) && | |
774 | ifa->ifa_prefixlen < 31) | |
775 | ifa->ifa_broadcast = ifa->ifa_address | | |
776 | ~ifa->ifa_mask; | |
777 | } else { | |
778 | ifa->ifa_prefixlen = 32; | |
779 | ifa->ifa_mask = inet_make_mask(32); | |
780 | } | |
781 | ret = inet_set_ifa(dev, ifa); | |
782 | break; | |
783 | ||
784 | case SIOCSIFBRDADDR: /* Set the broadcast address */ | |
785 | ret = 0; | |
786 | if (ifa->ifa_broadcast != sin->sin_addr.s_addr) { | |
787 | inet_del_ifa(in_dev, ifap, 0); | |
788 | ifa->ifa_broadcast = sin->sin_addr.s_addr; | |
789 | inet_insert_ifa(ifa); | |
790 | } | |
791 | break; | |
792 | ||
793 | case SIOCSIFDSTADDR: /* Set the destination address */ | |
794 | ret = 0; | |
795 | if (ifa->ifa_address == sin->sin_addr.s_addr) | |
796 | break; | |
797 | ret = -EINVAL; | |
798 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) | |
799 | break; | |
800 | ret = 0; | |
801 | inet_del_ifa(in_dev, ifap, 0); | |
802 | ifa->ifa_address = sin->sin_addr.s_addr; | |
803 | inet_insert_ifa(ifa); | |
804 | break; | |
805 | ||
806 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ | |
807 | ||
808 | /* | |
809 | * The mask we set must be legal. | |
810 | */ | |
811 | ret = -EINVAL; | |
812 | if (bad_mask(sin->sin_addr.s_addr, 0)) | |
813 | break; | |
814 | ret = 0; | |
815 | if (ifa->ifa_mask != sin->sin_addr.s_addr) { | |
a144ea4b | 816 | __be32 old_mask = ifa->ifa_mask; |
1da177e4 LT |
817 | inet_del_ifa(in_dev, ifap, 0); |
818 | ifa->ifa_mask = sin->sin_addr.s_addr; | |
819 | ifa->ifa_prefixlen = inet_mask_len(ifa->ifa_mask); | |
820 | ||
821 | /* See if current broadcast address matches | |
822 | * with current netmask, then recalculate | |
823 | * the broadcast address. Otherwise it's a | |
824 | * funny address, so don't touch it since | |
825 | * the user seems to know what (s)he's doing... | |
826 | */ | |
827 | if ((dev->flags & IFF_BROADCAST) && | |
828 | (ifa->ifa_prefixlen < 31) && | |
829 | (ifa->ifa_broadcast == | |
dcab5e1e | 830 | (ifa->ifa_local|~old_mask))) { |
1da177e4 LT |
831 | ifa->ifa_broadcast = (ifa->ifa_local | |
832 | ~sin->sin_addr.s_addr); | |
833 | } | |
834 | inet_insert_ifa(ifa); | |
835 | } | |
836 | break; | |
837 | } | |
838 | done: | |
839 | rtnl_unlock(); | |
840 | out: | |
841 | return ret; | |
842 | rarok: | |
843 | rtnl_unlock(); | |
844 | ret = copy_to_user(arg, &ifr, sizeof(struct ifreq)) ? -EFAULT : 0; | |
845 | goto out; | |
846 | } | |
847 | ||
848 | static int inet_gifconf(struct net_device *dev, char __user *buf, int len) | |
849 | { | |
e5ed6399 | 850 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
851 | struct in_ifaddr *ifa; |
852 | struct ifreq ifr; | |
853 | int done = 0; | |
854 | ||
855 | if (!in_dev || (ifa = in_dev->ifa_list) == NULL) | |
856 | goto out; | |
857 | ||
858 | for (; ifa; ifa = ifa->ifa_next) { | |
859 | if (!buf) { | |
860 | done += sizeof(ifr); | |
861 | continue; | |
862 | } | |
863 | if (len < (int) sizeof(ifr)) | |
864 | break; | |
865 | memset(&ifr, 0, sizeof(struct ifreq)); | |
866 | if (ifa->ifa_label) | |
867 | strcpy(ifr.ifr_name, ifa->ifa_label); | |
868 | else | |
869 | strcpy(ifr.ifr_name, dev->name); | |
870 | ||
871 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_family = AF_INET; | |
872 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_addr.s_addr = | |
873 | ifa->ifa_local; | |
874 | ||
875 | if (copy_to_user(buf, &ifr, sizeof(struct ifreq))) { | |
876 | done = -EFAULT; | |
877 | break; | |
878 | } | |
879 | buf += sizeof(struct ifreq); | |
880 | len -= sizeof(struct ifreq); | |
881 | done += sizeof(struct ifreq); | |
882 | } | |
883 | out: | |
884 | return done; | |
885 | } | |
886 | ||
a61ced5d | 887 | __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope) |
1da177e4 | 888 | { |
a61ced5d | 889 | __be32 addr = 0; |
1da177e4 LT |
890 | struct in_device *in_dev; |
891 | ||
892 | rcu_read_lock(); | |
e5ed6399 | 893 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
894 | if (!in_dev) |
895 | goto no_in_dev; | |
896 | ||
897 | for_primary_ifa(in_dev) { | |
898 | if (ifa->ifa_scope > scope) | |
899 | continue; | |
900 | if (!dst || inet_ifa_match(dst, ifa)) { | |
901 | addr = ifa->ifa_local; | |
902 | break; | |
903 | } | |
904 | if (!addr) | |
905 | addr = ifa->ifa_local; | |
906 | } endfor_ifa(in_dev); | |
907 | no_in_dev: | |
908 | rcu_read_unlock(); | |
909 | ||
910 | if (addr) | |
911 | goto out; | |
912 | ||
913 | /* Not loopback addresses on loopback should be preferred | |
914 | in this case. It is importnat that lo is the first interface | |
915 | in dev_base list. | |
916 | */ | |
917 | read_lock(&dev_base_lock); | |
918 | rcu_read_lock(); | |
7562f876 | 919 | for_each_netdev(dev) { |
e5ed6399 | 920 | if ((in_dev = __in_dev_get_rcu(dev)) == NULL) |
1da177e4 LT |
921 | continue; |
922 | ||
923 | for_primary_ifa(in_dev) { | |
924 | if (ifa->ifa_scope != RT_SCOPE_LINK && | |
925 | ifa->ifa_scope <= scope) { | |
926 | addr = ifa->ifa_local; | |
927 | goto out_unlock_both; | |
928 | } | |
929 | } endfor_ifa(in_dev); | |
930 | } | |
931 | out_unlock_both: | |
932 | read_unlock(&dev_base_lock); | |
933 | rcu_read_unlock(); | |
934 | out: | |
935 | return addr; | |
936 | } | |
937 | ||
60cad5da AV |
938 | static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst, |
939 | __be32 local, int scope) | |
1da177e4 LT |
940 | { |
941 | int same = 0; | |
a144ea4b | 942 | __be32 addr = 0; |
1da177e4 LT |
943 | |
944 | for_ifa(in_dev) { | |
945 | if (!addr && | |
946 | (local == ifa->ifa_local || !local) && | |
947 | ifa->ifa_scope <= scope) { | |
948 | addr = ifa->ifa_local; | |
949 | if (same) | |
950 | break; | |
951 | } | |
952 | if (!same) { | |
953 | same = (!local || inet_ifa_match(local, ifa)) && | |
954 | (!dst || inet_ifa_match(dst, ifa)); | |
955 | if (same && addr) { | |
956 | if (local || !dst) | |
957 | break; | |
958 | /* Is the selected addr into dst subnet? */ | |
959 | if (inet_ifa_match(addr, ifa)) | |
960 | break; | |
961 | /* No, then can we use new local src? */ | |
962 | if (ifa->ifa_scope <= scope) { | |
963 | addr = ifa->ifa_local; | |
964 | break; | |
965 | } | |
966 | /* search for large dst subnet for addr */ | |
967 | same = 0; | |
968 | } | |
969 | } | |
970 | } endfor_ifa(in_dev); | |
971 | ||
972 | return same? addr : 0; | |
973 | } | |
974 | ||
975 | /* | |
976 | * Confirm that local IP address exists using wildcards: | |
977 | * - dev: only on this interface, 0=any interface | |
978 | * - dst: only in the same subnet as dst, 0=any dst | |
979 | * - local: address, 0=autoselect the local address | |
980 | * - scope: maximum allowed scope value for the local address | |
981 | */ | |
60cad5da | 982 | __be32 inet_confirm_addr(const struct net_device *dev, __be32 dst, __be32 local, int scope) |
1da177e4 | 983 | { |
60cad5da | 984 | __be32 addr = 0; |
1da177e4 LT |
985 | struct in_device *in_dev; |
986 | ||
987 | if (dev) { | |
988 | rcu_read_lock(); | |
e5ed6399 | 989 | if ((in_dev = __in_dev_get_rcu(dev))) |
1da177e4 LT |
990 | addr = confirm_addr_indev(in_dev, dst, local, scope); |
991 | rcu_read_unlock(); | |
992 | ||
993 | return addr; | |
994 | } | |
995 | ||
996 | read_lock(&dev_base_lock); | |
997 | rcu_read_lock(); | |
7562f876 | 998 | for_each_netdev(dev) { |
e5ed6399 | 999 | if ((in_dev = __in_dev_get_rcu(dev))) { |
1da177e4 LT |
1000 | addr = confirm_addr_indev(in_dev, dst, local, scope); |
1001 | if (addr) | |
1002 | break; | |
1003 | } | |
1004 | } | |
1005 | rcu_read_unlock(); | |
1006 | read_unlock(&dev_base_lock); | |
1007 | ||
1008 | return addr; | |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | * Device notifier | |
1013 | */ | |
1014 | ||
1015 | int register_inetaddr_notifier(struct notifier_block *nb) | |
1016 | { | |
e041c683 | 1017 | return blocking_notifier_chain_register(&inetaddr_chain, nb); |
1da177e4 LT |
1018 | } |
1019 | ||
1020 | int unregister_inetaddr_notifier(struct notifier_block *nb) | |
1021 | { | |
e041c683 | 1022 | return blocking_notifier_chain_unregister(&inetaddr_chain, nb); |
1da177e4 LT |
1023 | } |
1024 | ||
1025 | /* Rename ifa_labels for a device name change. Make some effort to preserve existing | |
1026 | * alias numbering and to create unique labels if possible. | |
1027 | */ | |
1028 | static void inetdev_changename(struct net_device *dev, struct in_device *in_dev) | |
e905a9ed | 1029 | { |
1da177e4 LT |
1030 | struct in_ifaddr *ifa; |
1031 | int named = 0; | |
1032 | ||
e905a9ed YH |
1033 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
1034 | char old[IFNAMSIZ], *dot; | |
1da177e4 LT |
1035 | |
1036 | memcpy(old, ifa->ifa_label, IFNAMSIZ); | |
e905a9ed | 1037 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
1da177e4 LT |
1038 | if (named++ == 0) |
1039 | continue; | |
1040 | dot = strchr(ifa->ifa_label, ':'); | |
e905a9ed YH |
1041 | if (dot == NULL) { |
1042 | sprintf(old, ":%d", named); | |
1da177e4 LT |
1043 | dot = old; |
1044 | } | |
e905a9ed YH |
1045 | if (strlen(dot) + strlen(dev->name) < IFNAMSIZ) { |
1046 | strcat(ifa->ifa_label, dot); | |
1047 | } else { | |
1048 | strcpy(ifa->ifa_label + (IFNAMSIZ - strlen(dot) - 1), dot); | |
1049 | } | |
1050 | } | |
1051 | } | |
1da177e4 LT |
1052 | |
1053 | /* Called only under RTNL semaphore */ | |
1054 | ||
1055 | static int inetdev_event(struct notifier_block *this, unsigned long event, | |
1056 | void *ptr) | |
1057 | { | |
1058 | struct net_device *dev = ptr; | |
e5ed6399 | 1059 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
1060 | |
1061 | ASSERT_RTNL(); | |
1062 | ||
1063 | if (!in_dev) { | |
8030f544 | 1064 | if (event == NETDEV_REGISTER) { |
1da177e4 | 1065 | in_dev = inetdev_init(dev); |
8030f544 | 1066 | if (dev == &loopback_dev) { |
8d76527e HX |
1067 | if (!in_dev) |
1068 | panic("devinet: " | |
1069 | "Failed to create loopback\n"); | |
42f811b8 HX |
1070 | IN_DEV_CONF_SET(in_dev, NOXFRM, 1); |
1071 | IN_DEV_CONF_SET(in_dev, NOPOLICY, 1); | |
8030f544 | 1072 | } |
1da177e4 LT |
1073 | } |
1074 | goto out; | |
1075 | } | |
1076 | ||
1077 | switch (event) { | |
1078 | case NETDEV_REGISTER: | |
1079 | printk(KERN_DEBUG "inetdev_event: bug\n"); | |
1080 | dev->ip_ptr = NULL; | |
1081 | break; | |
1082 | case NETDEV_UP: | |
1083 | if (dev->mtu < 68) | |
1084 | break; | |
1085 | if (dev == &loopback_dev) { | |
1086 | struct in_ifaddr *ifa; | |
1087 | if ((ifa = inet_alloc_ifa()) != NULL) { | |
1088 | ifa->ifa_local = | |
1089 | ifa->ifa_address = htonl(INADDR_LOOPBACK); | |
1090 | ifa->ifa_prefixlen = 8; | |
1091 | ifa->ifa_mask = inet_make_mask(8); | |
1092 | in_dev_hold(in_dev); | |
1093 | ifa->ifa_dev = in_dev; | |
1094 | ifa->ifa_scope = RT_SCOPE_HOST; | |
1095 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
1096 | inet_insert_ifa(ifa); | |
1097 | } | |
1098 | } | |
1099 | ip_mc_up(in_dev); | |
1100 | break; | |
1101 | case NETDEV_DOWN: | |
1102 | ip_mc_down(in_dev); | |
1103 | break; | |
1104 | case NETDEV_CHANGEMTU: | |
1105 | if (dev->mtu >= 68) | |
1106 | break; | |
1107 | /* MTU falled under 68, disable IP */ | |
1108 | case NETDEV_UNREGISTER: | |
1109 | inetdev_destroy(in_dev); | |
1110 | break; | |
1111 | case NETDEV_CHANGENAME: | |
1112 | /* Do not notify about label change, this event is | |
1113 | * not interesting to applications using netlink. | |
1114 | */ | |
1115 | inetdev_changename(dev, in_dev); | |
1116 | ||
1117 | #ifdef CONFIG_SYSCTL | |
1118 | devinet_sysctl_unregister(&in_dev->cnf); | |
1119 | neigh_sysctl_unregister(in_dev->arp_parms); | |
1120 | neigh_sysctl_register(dev, in_dev->arp_parms, NET_IPV4, | |
1121 | NET_IPV4_NEIGH, "ipv4", NULL, NULL); | |
1122 | devinet_sysctl_register(in_dev, &in_dev->cnf); | |
1123 | #endif | |
1124 | break; | |
1125 | } | |
1126 | out: | |
1127 | return NOTIFY_DONE; | |
1128 | } | |
1129 | ||
1130 | static struct notifier_block ip_netdev_notifier = { | |
1131 | .notifier_call =inetdev_event, | |
1132 | }; | |
1133 | ||
339bf98f TG |
1134 | static inline size_t inet_nlmsg_size(void) |
1135 | { | |
1136 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) | |
1137 | + nla_total_size(4) /* IFA_ADDRESS */ | |
1138 | + nla_total_size(4) /* IFA_LOCAL */ | |
1139 | + nla_total_size(4) /* IFA_BROADCAST */ | |
1140 | + nla_total_size(4) /* IFA_ANYCAST */ | |
1141 | + nla_total_size(IFNAMSIZ); /* IFA_LABEL */ | |
1142 | } | |
1143 | ||
1da177e4 | 1144 | static int inet_fill_ifaddr(struct sk_buff *skb, struct in_ifaddr *ifa, |
b6544c0b | 1145 | u32 pid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
1146 | { |
1147 | struct ifaddrmsg *ifm; | |
1148 | struct nlmsghdr *nlh; | |
1da177e4 | 1149 | |
47f68512 TG |
1150 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags); |
1151 | if (nlh == NULL) | |
26932566 | 1152 | return -EMSGSIZE; |
47f68512 TG |
1153 | |
1154 | ifm = nlmsg_data(nlh); | |
1da177e4 LT |
1155 | ifm->ifa_family = AF_INET; |
1156 | ifm->ifa_prefixlen = ifa->ifa_prefixlen; | |
1157 | ifm->ifa_flags = ifa->ifa_flags|IFA_F_PERMANENT; | |
1158 | ifm->ifa_scope = ifa->ifa_scope; | |
1159 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; | |
47f68512 | 1160 | |
1da177e4 | 1161 | if (ifa->ifa_address) |
a7a628c4 | 1162 | NLA_PUT_BE32(skb, IFA_ADDRESS, ifa->ifa_address); |
47f68512 | 1163 | |
1da177e4 | 1164 | if (ifa->ifa_local) |
a7a628c4 | 1165 | NLA_PUT_BE32(skb, IFA_LOCAL, ifa->ifa_local); |
47f68512 | 1166 | |
1da177e4 | 1167 | if (ifa->ifa_broadcast) |
a7a628c4 | 1168 | NLA_PUT_BE32(skb, IFA_BROADCAST, ifa->ifa_broadcast); |
47f68512 | 1169 | |
1da177e4 | 1170 | if (ifa->ifa_anycast) |
a7a628c4 | 1171 | NLA_PUT_BE32(skb, IFA_ANYCAST, ifa->ifa_anycast); |
47f68512 | 1172 | |
1da177e4 | 1173 | if (ifa->ifa_label[0]) |
47f68512 | 1174 | NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label); |
1da177e4 | 1175 | |
47f68512 TG |
1176 | return nlmsg_end(skb, nlh); |
1177 | ||
1178 | nla_put_failure: | |
26932566 PM |
1179 | nlmsg_cancel(skb, nlh); |
1180 | return -EMSGSIZE; | |
1da177e4 LT |
1181 | } |
1182 | ||
1183 | static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
1184 | { | |
1185 | int idx, ip_idx; | |
1186 | struct net_device *dev; | |
1187 | struct in_device *in_dev; | |
1188 | struct in_ifaddr *ifa; | |
1189 | int s_ip_idx, s_idx = cb->args[0]; | |
1190 | ||
1191 | s_ip_idx = ip_idx = cb->args[1]; | |
7562f876 PE |
1192 | idx = 0; |
1193 | for_each_netdev(dev) { | |
1da177e4 | 1194 | if (idx < s_idx) |
7562f876 | 1195 | goto cont; |
1da177e4 LT |
1196 | if (idx > s_idx) |
1197 | s_ip_idx = 0; | |
6313c1e0 | 1198 | if ((in_dev = __in_dev_get_rtnl(dev)) == NULL) |
7562f876 | 1199 | goto cont; |
1da177e4 LT |
1200 | |
1201 | for (ifa = in_dev->ifa_list, ip_idx = 0; ifa; | |
1202 | ifa = ifa->ifa_next, ip_idx++) { | |
1203 | if (ip_idx < s_ip_idx) | |
7562f876 | 1204 | goto cont; |
1da177e4 LT |
1205 | if (inet_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid, |
1206 | cb->nlh->nlmsg_seq, | |
6313c1e0 | 1207 | RTM_NEWADDR, NLM_F_MULTI) <= 0) |
1da177e4 | 1208 | goto done; |
1da177e4 | 1209 | } |
7562f876 PE |
1210 | cont: |
1211 | idx++; | |
1da177e4 LT |
1212 | } |
1213 | ||
1214 | done: | |
1da177e4 LT |
1215 | cb->args[0] = idx; |
1216 | cb->args[1] = ip_idx; | |
1217 | ||
1218 | return skb->len; | |
1219 | } | |
1220 | ||
d6062cbb TG |
1221 | static void rtmsg_ifa(int event, struct in_ifaddr* ifa, struct nlmsghdr *nlh, |
1222 | u32 pid) | |
1da177e4 | 1223 | { |
47f68512 | 1224 | struct sk_buff *skb; |
d6062cbb TG |
1225 | u32 seq = nlh ? nlh->nlmsg_seq : 0; |
1226 | int err = -ENOBUFS; | |
1da177e4 | 1227 | |
339bf98f | 1228 | skb = nlmsg_new(inet_nlmsg_size(), GFP_KERNEL); |
47f68512 | 1229 | if (skb == NULL) |
d6062cbb TG |
1230 | goto errout; |
1231 | ||
1232 | err = inet_fill_ifaddr(skb, ifa, pid, seq, event, 0); | |
26932566 PM |
1233 | if (err < 0) { |
1234 | /* -EMSGSIZE implies BUG in inet_nlmsg_size() */ | |
1235 | WARN_ON(err == -EMSGSIZE); | |
1236 | kfree_skb(skb); | |
1237 | goto errout; | |
1238 | } | |
d6062cbb TG |
1239 | err = rtnl_notify(skb, pid, RTNLGRP_IPV4_IFADDR, nlh, GFP_KERNEL); |
1240 | errout: | |
1241 | if (err < 0) | |
1242 | rtnl_set_sk_err(RTNLGRP_IPV4_IFADDR, err); | |
1da177e4 LT |
1243 | } |
1244 | ||
1da177e4 LT |
1245 | #ifdef CONFIG_SYSCTL |
1246 | ||
1247 | void inet_forward_change(void) | |
1248 | { | |
1249 | struct net_device *dev; | |
42f811b8 | 1250 | int on = IPV4_DEVCONF_ALL(FORWARDING); |
1da177e4 | 1251 | |
42f811b8 HX |
1252 | IPV4_DEVCONF_ALL(ACCEPT_REDIRECTS) = !on; |
1253 | IPV4_DEVCONF_DFLT(FORWARDING) = on; | |
1da177e4 LT |
1254 | |
1255 | read_lock(&dev_base_lock); | |
7562f876 | 1256 | for_each_netdev(dev) { |
1da177e4 LT |
1257 | struct in_device *in_dev; |
1258 | rcu_read_lock(); | |
e5ed6399 | 1259 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 | 1260 | if (in_dev) |
42f811b8 | 1261 | IN_DEV_CONF_SET(in_dev, FORWARDING, on); |
1da177e4 LT |
1262 | rcu_read_unlock(); |
1263 | } | |
1264 | read_unlock(&dev_base_lock); | |
1265 | ||
1266 | rt_cache_flush(0); | |
1267 | } | |
1268 | ||
1269 | static int devinet_sysctl_forward(ctl_table *ctl, int write, | |
1270 | struct file* filp, void __user *buffer, | |
1271 | size_t *lenp, loff_t *ppos) | |
1272 | { | |
1273 | int *valp = ctl->data; | |
1274 | int val = *valp; | |
1275 | int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
1276 | ||
1277 | if (write && *valp != val) { | |
42f811b8 | 1278 | if (valp == &IPV4_DEVCONF_ALL(FORWARDING)) |
1da177e4 | 1279 | inet_forward_change(); |
42f811b8 | 1280 | else if (valp != &IPV4_DEVCONF_DFLT(FORWARDING)) |
1da177e4 LT |
1281 | rt_cache_flush(0); |
1282 | } | |
1283 | ||
1284 | return ret; | |
1285 | } | |
1286 | ||
1287 | int ipv4_doint_and_flush(ctl_table *ctl, int write, | |
1288 | struct file* filp, void __user *buffer, | |
1289 | size_t *lenp, loff_t *ppos) | |
1290 | { | |
1291 | int *valp = ctl->data; | |
1292 | int val = *valp; | |
1293 | int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); | |
1294 | ||
1295 | if (write && *valp != val) | |
1296 | rt_cache_flush(0); | |
1297 | ||
1298 | return ret; | |
1299 | } | |
1300 | ||
1301 | int ipv4_doint_and_flush_strategy(ctl_table *table, int __user *name, int nlen, | |
1302 | void __user *oldval, size_t __user *oldlenp, | |
1f29bcd7 | 1303 | void __user *newval, size_t newlen) |
1da177e4 LT |
1304 | { |
1305 | int *valp = table->data; | |
1306 | int new; | |
1307 | ||
1308 | if (!newval || !newlen) | |
1309 | return 0; | |
1310 | ||
1311 | if (newlen != sizeof(int)) | |
1312 | return -EINVAL; | |
1313 | ||
1314 | if (get_user(new, (int __user *)newval)) | |
1315 | return -EFAULT; | |
1316 | ||
1317 | if (new == *valp) | |
1318 | return 0; | |
1319 | ||
1320 | if (oldval && oldlenp) { | |
1321 | size_t len; | |
1322 | ||
1323 | if (get_user(len, oldlenp)) | |
1324 | return -EFAULT; | |
1325 | ||
1326 | if (len) { | |
1327 | if (len > table->maxlen) | |
1328 | len = table->maxlen; | |
1329 | if (copy_to_user(oldval, valp, len)) | |
1330 | return -EFAULT; | |
1331 | if (put_user(len, oldlenp)) | |
1332 | return -EFAULT; | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | *valp = new; | |
1337 | rt_cache_flush(0); | |
1338 | return 1; | |
1339 | } | |
1340 | ||
1341 | ||
42f811b8 HX |
1342 | #define DEVINET_SYSCTL_ENTRY(attr, name, mval, proc, sysctl) \ |
1343 | { \ | |
1344 | .ctl_name = NET_IPV4_CONF_ ## attr, \ | |
1345 | .procname = name, \ | |
1346 | .data = ipv4_devconf.data + \ | |
1347 | NET_IPV4_CONF_ ## attr - 1, \ | |
1348 | .maxlen = sizeof(int), \ | |
1349 | .mode = mval, \ | |
1350 | .proc_handler = proc, \ | |
1351 | .strategy = sysctl, \ | |
1352 | } | |
1353 | ||
1354 | #define DEVINET_SYSCTL_RW_ENTRY(attr, name) \ | |
1355 | DEVINET_SYSCTL_ENTRY(attr, name, 0644, &proc_dointvec, NULL) | |
1356 | ||
1357 | #define DEVINET_SYSCTL_RO_ENTRY(attr, name) \ | |
1358 | DEVINET_SYSCTL_ENTRY(attr, name, 0444, &proc_dointvec, NULL) | |
1359 | ||
1360 | #define DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, proc, sysctl) \ | |
1361 | DEVINET_SYSCTL_ENTRY(attr, name, 0644, proc, sysctl) | |
1362 | ||
1363 | #define DEVINET_SYSCTL_FLUSHING_ENTRY(attr, name) \ | |
1364 | DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, ipv4_doint_and_flush, \ | |
1365 | ipv4_doint_and_flush_strategy) | |
1366 | ||
1da177e4 LT |
1367 | static struct devinet_sysctl_table { |
1368 | struct ctl_table_header *sysctl_header; | |
1369 | ctl_table devinet_vars[__NET_IPV4_CONF_MAX]; | |
1370 | ctl_table devinet_dev[2]; | |
1371 | ctl_table devinet_conf_dir[2]; | |
1372 | ctl_table devinet_proto_dir[2]; | |
1373 | ctl_table devinet_root_dir[2]; | |
1374 | } devinet_sysctl = { | |
1375 | .devinet_vars = { | |
42f811b8 HX |
1376 | DEVINET_SYSCTL_COMPLEX_ENTRY(FORWARDING, "forwarding", |
1377 | devinet_sysctl_forward, NULL), | |
1378 | DEVINET_SYSCTL_RO_ENTRY(MC_FORWARDING, "mc_forwarding"), | |
1379 | ||
1380 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_REDIRECTS, "accept_redirects"), | |
1381 | DEVINET_SYSCTL_RW_ENTRY(SECURE_REDIRECTS, "secure_redirects"), | |
1382 | DEVINET_SYSCTL_RW_ENTRY(SHARED_MEDIA, "shared_media"), | |
1383 | DEVINET_SYSCTL_RW_ENTRY(RP_FILTER, "rp_filter"), | |
1384 | DEVINET_SYSCTL_RW_ENTRY(SEND_REDIRECTS, "send_redirects"), | |
1385 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_SOURCE_ROUTE, | |
1386 | "accept_source_route"), | |
1387 | DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP, "proxy_arp"), | |
1388 | DEVINET_SYSCTL_RW_ENTRY(MEDIUM_ID, "medium_id"), | |
1389 | DEVINET_SYSCTL_RW_ENTRY(BOOTP_RELAY, "bootp_relay"), | |
1390 | DEVINET_SYSCTL_RW_ENTRY(LOG_MARTIANS, "log_martians"), | |
1391 | DEVINET_SYSCTL_RW_ENTRY(TAG, "tag"), | |
1392 | DEVINET_SYSCTL_RW_ENTRY(ARPFILTER, "arp_filter"), | |
1393 | DEVINET_SYSCTL_RW_ENTRY(ARP_ANNOUNCE, "arp_announce"), | |
1394 | DEVINET_SYSCTL_RW_ENTRY(ARP_IGNORE, "arp_ignore"), | |
1395 | DEVINET_SYSCTL_RW_ENTRY(ARP_ACCEPT, "arp_accept"), | |
1396 | ||
1397 | DEVINET_SYSCTL_FLUSHING_ENTRY(NOXFRM, "disable_xfrm"), | |
1398 | DEVINET_SYSCTL_FLUSHING_ENTRY(NOPOLICY, "disable_policy"), | |
1399 | DEVINET_SYSCTL_FLUSHING_ENTRY(FORCE_IGMP_VERSION, | |
1400 | "force_igmp_version"), | |
1401 | DEVINET_SYSCTL_FLUSHING_ENTRY(PROMOTE_SECONDARIES, | |
1402 | "promote_secondaries"), | |
1da177e4 LT |
1403 | }, |
1404 | .devinet_dev = { | |
1405 | { | |
1406 | .ctl_name = NET_PROTO_CONF_ALL, | |
1407 | .procname = "all", | |
1408 | .mode = 0555, | |
1409 | .child = devinet_sysctl.devinet_vars, | |
1410 | }, | |
1411 | }, | |
1412 | .devinet_conf_dir = { | |
e905a9ed | 1413 | { |
1da177e4 LT |
1414 | .ctl_name = NET_IPV4_CONF, |
1415 | .procname = "conf", | |
1416 | .mode = 0555, | |
1417 | .child = devinet_sysctl.devinet_dev, | |
1418 | }, | |
1419 | }, | |
1420 | .devinet_proto_dir = { | |
1421 | { | |
1422 | .ctl_name = NET_IPV4, | |
1423 | .procname = "ipv4", | |
1424 | .mode = 0555, | |
1425 | .child = devinet_sysctl.devinet_conf_dir, | |
1426 | }, | |
1427 | }, | |
1428 | .devinet_root_dir = { | |
1429 | { | |
1430 | .ctl_name = CTL_NET, | |
1431 | .procname = "net", | |
1432 | .mode = 0555, | |
1433 | .child = devinet_sysctl.devinet_proto_dir, | |
1434 | }, | |
1435 | }, | |
1436 | }; | |
1437 | ||
1438 | static void devinet_sysctl_register(struct in_device *in_dev, | |
1439 | struct ipv4_devconf *p) | |
1440 | { | |
1441 | int i; | |
1442 | struct net_device *dev = in_dev ? in_dev->dev : NULL; | |
42e5ea46 ACM |
1443 | struct devinet_sysctl_table *t = kmemdup(&devinet_sysctl, sizeof(*t), |
1444 | GFP_KERNEL); | |
1da177e4 LT |
1445 | char *dev_name = NULL; |
1446 | ||
1447 | if (!t) | |
1448 | return; | |
1da177e4 LT |
1449 | for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) { |
1450 | t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf; | |
1da177e4 LT |
1451 | } |
1452 | ||
1453 | if (dev) { | |
e905a9ed | 1454 | dev_name = dev->name; |
1da177e4 LT |
1455 | t->devinet_dev[0].ctl_name = dev->ifindex; |
1456 | } else { | |
1457 | dev_name = "default"; | |
1458 | t->devinet_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; | |
1459 | } | |
1460 | ||
e905a9ed YH |
1461 | /* |
1462 | * Make a copy of dev_name, because '.procname' is regarded as const | |
1da177e4 LT |
1463 | * by sysctl and we wouldn't want anyone to change it under our feet |
1464 | * (see SIOCSIFNAME). | |
e905a9ed | 1465 | */ |
543537bd | 1466 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
1da177e4 LT |
1467 | if (!dev_name) |
1468 | goto free; | |
1469 | ||
1470 | t->devinet_dev[0].procname = dev_name; | |
1471 | t->devinet_dev[0].child = t->devinet_vars; | |
1da177e4 | 1472 | t->devinet_conf_dir[0].child = t->devinet_dev; |
1da177e4 | 1473 | t->devinet_proto_dir[0].child = t->devinet_conf_dir; |
1da177e4 | 1474 | t->devinet_root_dir[0].child = t->devinet_proto_dir; |
1da177e4 | 1475 | |
0b4d4147 | 1476 | t->sysctl_header = register_sysctl_table(t->devinet_root_dir); |
1da177e4 LT |
1477 | if (!t->sysctl_header) |
1478 | goto free_procname; | |
1479 | ||
1480 | p->sysctl = t; | |
1481 | return; | |
1482 | ||
1483 | /* error path */ | |
1484 | free_procname: | |
1485 | kfree(dev_name); | |
1486 | free: | |
1487 | kfree(t); | |
1488 | return; | |
1489 | } | |
1490 | ||
1491 | static void devinet_sysctl_unregister(struct ipv4_devconf *p) | |
1492 | { | |
1493 | if (p->sysctl) { | |
1494 | struct devinet_sysctl_table *t = p->sysctl; | |
1495 | p->sysctl = NULL; | |
1496 | unregister_sysctl_table(t->sysctl_header); | |
1497 | kfree(t->devinet_dev[0].procname); | |
1498 | kfree(t); | |
1499 | } | |
1500 | } | |
1501 | #endif | |
1502 | ||
1503 | void __init devinet_init(void) | |
1504 | { | |
1505 | register_gifconf(PF_INET, inet_gifconf); | |
1506 | register_netdevice_notifier(&ip_netdev_notifier); | |
63f3444f TG |
1507 | |
1508 | rtnl_register(PF_INET, RTM_NEWADDR, inet_rtm_newaddr, NULL); | |
1509 | rtnl_register(PF_INET, RTM_DELADDR, inet_rtm_deladdr, NULL); | |
1510 | rtnl_register(PF_INET, RTM_GETADDR, NULL, inet_dump_ifaddr); | |
1da177e4 LT |
1511 | #ifdef CONFIG_SYSCTL |
1512 | devinet_sysctl.sysctl_header = | |
0b4d4147 | 1513 | register_sysctl_table(devinet_sysctl.devinet_root_dir); |
1da177e4 LT |
1514 | devinet_sysctl_register(NULL, &ipv4_devconf_dflt); |
1515 | #endif | |
1516 | } | |
1517 | ||
1da177e4 LT |
1518 | EXPORT_SYMBOL(in_dev_finish_destroy); |
1519 | EXPORT_SYMBOL(inet_select_addr); | |
1520 | EXPORT_SYMBOL(inetdev_by_index); | |
1521 | EXPORT_SYMBOL(register_inetaddr_notifier); | |
1522 | EXPORT_SYMBOL(unregister_inetaddr_notifier); |