Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 12 | * Authors: Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 30 | #include <linux/config.h> |
| 31 | |
| 32 | #include <asm/uaccess.h> |
| 33 | #include <asm/system.h> |
| 34 | #include <linux/bitops.h> |
| 35 | #include <linux/module.h> |
| 36 | #include <linux/types.h> |
| 37 | #include <linux/kernel.h> |
| 38 | #include <linux/sched.h> |
| 39 | #include <linux/string.h> |
| 40 | #include <linux/mm.h> |
| 41 | #include <linux/socket.h> |
| 42 | #include <linux/sockios.h> |
| 43 | #include <linux/in.h> |
| 44 | #include <linux/errno.h> |
| 45 | #include <linux/interrupt.h> |
| 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> |
| 51 | #include <linux/rtnetlink.h> |
| 52 | #include <linux/init.h> |
| 53 | #include <linux/notifier.h> |
| 54 | #include <linux/inetdevice.h> |
| 55 | #include <linux/igmp.h> |
| 56 | #ifdef CONFIG_SYSCTL |
| 57 | #include <linux/sysctl.h> |
| 58 | #endif |
| 59 | #include <linux/kmod.h> |
| 60 | |
| 61 | #include <net/ip.h> |
| 62 | #include <net/route.h> |
| 63 | #include <net/ip_fib.h> |
| 64 | |
| 65 | struct ipv4_devconf ipv4_devconf = { |
| 66 | .accept_redirects = 1, |
| 67 | .send_redirects = 1, |
| 68 | .secure_redirects = 1, |
| 69 | .shared_media = 1, |
| 70 | }; |
| 71 | |
| 72 | static struct ipv4_devconf ipv4_devconf_dflt = { |
| 73 | .accept_redirects = 1, |
| 74 | .send_redirects = 1, |
| 75 | .secure_redirects = 1, |
| 76 | .shared_media = 1, |
| 77 | .accept_source_route = 1, |
| 78 | }; |
| 79 | |
| 80 | static void rtmsg_ifa(int event, struct in_ifaddr *); |
| 81 | |
| 82 | static struct notifier_block *inetaddr_chain; |
| 83 | static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
| 84 | int destroy); |
| 85 | #ifdef CONFIG_SYSCTL |
| 86 | static void devinet_sysctl_register(struct in_device *in_dev, |
| 87 | struct ipv4_devconf *p); |
| 88 | static void devinet_sysctl_unregister(struct ipv4_devconf *p); |
| 89 | #endif |
| 90 | |
| 91 | /* Locks all the inet devices. */ |
| 92 | |
| 93 | static struct in_ifaddr *inet_alloc_ifa(void) |
| 94 | { |
| 95 | struct in_ifaddr *ifa = kmalloc(sizeof(*ifa), GFP_KERNEL); |
| 96 | |
| 97 | if (ifa) { |
| 98 | memset(ifa, 0, sizeof(*ifa)); |
| 99 | INIT_RCU_HEAD(&ifa->rcu_head); |
| 100 | } |
| 101 | |
| 102 | return ifa; |
| 103 | } |
| 104 | |
| 105 | static void inet_rcu_free_ifa(struct rcu_head *head) |
| 106 | { |
| 107 | struct in_ifaddr *ifa = container_of(head, struct in_ifaddr, rcu_head); |
| 108 | if (ifa->ifa_dev) |
| 109 | in_dev_put(ifa->ifa_dev); |
| 110 | kfree(ifa); |
| 111 | } |
| 112 | |
| 113 | static inline void inet_free_ifa(struct in_ifaddr *ifa) |
| 114 | { |
| 115 | call_rcu(&ifa->rcu_head, inet_rcu_free_ifa); |
| 116 | } |
| 117 | |
| 118 | void in_dev_finish_destroy(struct in_device *idev) |
| 119 | { |
| 120 | struct net_device *dev = idev->dev; |
| 121 | |
| 122 | BUG_TRAP(!idev->ifa_list); |
| 123 | BUG_TRAP(!idev->mc_list); |
| 124 | #ifdef NET_REFCNT_DEBUG |
| 125 | printk(KERN_DEBUG "in_dev_finish_destroy: %p=%s\n", |
| 126 | idev, dev ? dev->name : "NIL"); |
| 127 | #endif |
| 128 | dev_put(dev); |
| 129 | if (!idev->dead) |
| 130 | printk("Freeing alive in_device %p\n", idev); |
| 131 | else { |
| 132 | kfree(idev); |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | struct in_device *inetdev_init(struct net_device *dev) |
| 137 | { |
| 138 | struct in_device *in_dev; |
| 139 | |
| 140 | ASSERT_RTNL(); |
| 141 | |
| 142 | in_dev = kmalloc(sizeof(*in_dev), GFP_KERNEL); |
| 143 | if (!in_dev) |
| 144 | goto out; |
| 145 | memset(in_dev, 0, sizeof(*in_dev)); |
| 146 | INIT_RCU_HEAD(&in_dev->rcu_head); |
| 147 | memcpy(&in_dev->cnf, &ipv4_devconf_dflt, sizeof(in_dev->cnf)); |
| 148 | in_dev->cnf.sysctl = NULL; |
| 149 | in_dev->dev = dev; |
| 150 | if ((in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl)) == NULL) |
| 151 | goto out_kfree; |
| 152 | /* Reference in_dev->dev */ |
| 153 | dev_hold(dev); |
| 154 | #ifdef CONFIG_SYSCTL |
| 155 | neigh_sysctl_register(dev, in_dev->arp_parms, NET_IPV4, |
| 156 | NET_IPV4_NEIGH, "ipv4", NULL, NULL); |
| 157 | #endif |
| 158 | |
| 159 | /* Account for reference dev->ip_ptr */ |
| 160 | in_dev_hold(in_dev); |
| 161 | rcu_assign_pointer(dev->ip_ptr, in_dev); |
| 162 | |
| 163 | #ifdef CONFIG_SYSCTL |
| 164 | devinet_sysctl_register(in_dev, &in_dev->cnf); |
| 165 | #endif |
| 166 | ip_mc_init_dev(in_dev); |
| 167 | if (dev->flags & IFF_UP) |
| 168 | ip_mc_up(in_dev); |
| 169 | out: |
| 170 | return in_dev; |
| 171 | out_kfree: |
| 172 | kfree(in_dev); |
| 173 | in_dev = NULL; |
| 174 | goto out; |
| 175 | } |
| 176 | |
| 177 | static void in_dev_rcu_put(struct rcu_head *head) |
| 178 | { |
| 179 | struct in_device *idev = container_of(head, struct in_device, rcu_head); |
| 180 | in_dev_put(idev); |
| 181 | } |
| 182 | |
| 183 | static void inetdev_destroy(struct in_device *in_dev) |
| 184 | { |
| 185 | struct in_ifaddr *ifa; |
| 186 | struct net_device *dev; |
| 187 | |
| 188 | ASSERT_RTNL(); |
| 189 | |
| 190 | dev = in_dev->dev; |
| 191 | if (dev == &loopback_dev) |
| 192 | return; |
| 193 | |
| 194 | in_dev->dead = 1; |
| 195 | |
| 196 | ip_mc_destroy_dev(in_dev); |
| 197 | |
| 198 | while ((ifa = in_dev->ifa_list) != NULL) { |
| 199 | inet_del_ifa(in_dev, &in_dev->ifa_list, 0); |
| 200 | inet_free_ifa(ifa); |
| 201 | } |
| 202 | |
| 203 | #ifdef CONFIG_SYSCTL |
| 204 | devinet_sysctl_unregister(&in_dev->cnf); |
| 205 | #endif |
| 206 | |
| 207 | dev->ip_ptr = NULL; |
| 208 | |
| 209 | #ifdef CONFIG_SYSCTL |
| 210 | neigh_sysctl_unregister(in_dev->arp_parms); |
| 211 | #endif |
| 212 | neigh_parms_release(&arp_tbl, in_dev->arp_parms); |
| 213 | arp_ifdown(dev); |
| 214 | |
| 215 | call_rcu(&in_dev->rcu_head, in_dev_rcu_put); |
| 216 | } |
| 217 | |
| 218 | int inet_addr_onlink(struct in_device *in_dev, u32 a, u32 b) |
| 219 | { |
| 220 | rcu_read_lock(); |
| 221 | for_primary_ifa(in_dev) { |
| 222 | if (inet_ifa_match(a, ifa)) { |
| 223 | if (!b || inet_ifa_match(b, ifa)) { |
| 224 | rcu_read_unlock(); |
| 225 | return 1; |
| 226 | } |
| 227 | } |
| 228 | } endfor_ifa(in_dev); |
| 229 | rcu_read_unlock(); |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
| 234 | int destroy) |
| 235 | { |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 236 | struct in_ifaddr *promote = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | struct in_ifaddr *ifa1 = *ifap; |
| 238 | |
| 239 | ASSERT_RTNL(); |
| 240 | |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 241 | /* 1. Deleting primary ifaddr forces deletion all secondaries |
| 242 | * unless alias promotion is set |
| 243 | **/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
| 245 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY)) { |
| 246 | struct in_ifaddr *ifa; |
| 247 | struct in_ifaddr **ifap1 = &ifa1->ifa_next; |
| 248 | |
| 249 | while ((ifa = *ifap1) != NULL) { |
| 250 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) || |
| 251 | ifa1->ifa_mask != ifa->ifa_mask || |
| 252 | !inet_ifa_match(ifa1->ifa_address, ifa)) { |
| 253 | ifap1 = &ifa->ifa_next; |
| 254 | continue; |
| 255 | } |
| 256 | |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 257 | if (!IN_DEV_PROMOTE_SECONDARIES(in_dev)) { |
| 258 | *ifap1 = ifa->ifa_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 260 | rtmsg_ifa(RTM_DELADDR, ifa); |
| 261 | notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa); |
| 262 | inet_free_ifa(ifa); |
| 263 | } else { |
| 264 | promote = ifa; |
| 265 | break; |
| 266 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | } |
| 268 | } |
| 269 | |
| 270 | /* 2. Unlink it */ |
| 271 | |
| 272 | *ifap = ifa1->ifa_next; |
| 273 | |
| 274 | /* 3. Announce address deletion */ |
| 275 | |
| 276 | /* Send message first, then call notifier. |
| 277 | At first sight, FIB update triggered by notifier |
| 278 | will refer to already deleted ifaddr, that could confuse |
| 279 | netlink listeners. It is not true: look, gated sees |
| 280 | that route deleted and if it still thinks that ifaddr |
| 281 | is valid, it will try to restore deleted routes... Grr. |
| 282 | So that, this order is correct. |
| 283 | */ |
| 284 | rtmsg_ifa(RTM_DELADDR, ifa1); |
| 285 | notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1); |
| 286 | if (destroy) { |
| 287 | inet_free_ifa(ifa1); |
| 288 | |
| 289 | if (!in_dev->ifa_list) |
| 290 | inetdev_destroy(in_dev); |
| 291 | } |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 292 | |
| 293 | if (promote && IN_DEV_PROMOTE_SECONDARIES(in_dev)) { |
| 294 | /* not sure if we should send a delete notify first? */ |
| 295 | promote->ifa_flags &= ~IFA_F_SECONDARY; |
| 296 | rtmsg_ifa(RTM_NEWADDR, promote); |
| 297 | notifier_call_chain(&inetaddr_chain, NETDEV_UP, promote); |
| 298 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | static int inet_insert_ifa(struct in_ifaddr *ifa) |
| 302 | { |
| 303 | struct in_device *in_dev = ifa->ifa_dev; |
| 304 | struct in_ifaddr *ifa1, **ifap, **last_primary; |
| 305 | |
| 306 | ASSERT_RTNL(); |
| 307 | |
| 308 | if (!ifa->ifa_local) { |
| 309 | inet_free_ifa(ifa); |
| 310 | return 0; |
| 311 | } |
| 312 | |
| 313 | ifa->ifa_flags &= ~IFA_F_SECONDARY; |
| 314 | last_primary = &in_dev->ifa_list; |
| 315 | |
| 316 | for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL; |
| 317 | ifap = &ifa1->ifa_next) { |
| 318 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY) && |
| 319 | ifa->ifa_scope <= ifa1->ifa_scope) |
| 320 | last_primary = &ifa1->ifa_next; |
| 321 | if (ifa1->ifa_mask == ifa->ifa_mask && |
| 322 | inet_ifa_match(ifa1->ifa_address, ifa)) { |
| 323 | if (ifa1->ifa_local == ifa->ifa_local) { |
| 324 | inet_free_ifa(ifa); |
| 325 | return -EEXIST; |
| 326 | } |
| 327 | if (ifa1->ifa_scope != ifa->ifa_scope) { |
| 328 | inet_free_ifa(ifa); |
| 329 | return -EINVAL; |
| 330 | } |
| 331 | ifa->ifa_flags |= IFA_F_SECONDARY; |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) { |
| 336 | net_srandom(ifa->ifa_local); |
| 337 | ifap = last_primary; |
| 338 | } |
| 339 | |
| 340 | ifa->ifa_next = *ifap; |
| 341 | *ifap = ifa; |
| 342 | |
| 343 | /* Send message first, then call notifier. |
| 344 | Notifier will trigger FIB update, so that |
| 345 | listeners of netlink will know about new ifaddr */ |
| 346 | rtmsg_ifa(RTM_NEWADDR, ifa); |
| 347 | notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa); |
| 348 | |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa) |
| 353 | { |
| 354 | struct in_device *in_dev = __in_dev_get(dev); |
| 355 | |
| 356 | ASSERT_RTNL(); |
| 357 | |
| 358 | if (!in_dev) { |
| 359 | in_dev = inetdev_init(dev); |
| 360 | if (!in_dev) { |
| 361 | inet_free_ifa(ifa); |
| 362 | return -ENOBUFS; |
| 363 | } |
| 364 | } |
| 365 | if (ifa->ifa_dev != in_dev) { |
| 366 | BUG_TRAP(!ifa->ifa_dev); |
| 367 | in_dev_hold(in_dev); |
| 368 | ifa->ifa_dev = in_dev; |
| 369 | } |
| 370 | if (LOOPBACK(ifa->ifa_local)) |
| 371 | ifa->ifa_scope = RT_SCOPE_HOST; |
| 372 | return inet_insert_ifa(ifa); |
| 373 | } |
| 374 | |
| 375 | struct in_device *inetdev_by_index(int ifindex) |
| 376 | { |
| 377 | struct net_device *dev; |
| 378 | struct in_device *in_dev = NULL; |
| 379 | read_lock(&dev_base_lock); |
| 380 | dev = __dev_get_by_index(ifindex); |
| 381 | if (dev) |
| 382 | in_dev = in_dev_get(dev); |
| 383 | read_unlock(&dev_base_lock); |
| 384 | return in_dev; |
| 385 | } |
| 386 | |
| 387 | /* Called only from RTNL semaphored context. No locks. */ |
| 388 | |
| 389 | struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, u32 prefix, |
| 390 | u32 mask) |
| 391 | { |
| 392 | ASSERT_RTNL(); |
| 393 | |
| 394 | for_primary_ifa(in_dev) { |
| 395 | if (ifa->ifa_mask == mask && inet_ifa_match(prefix, ifa)) |
| 396 | return ifa; |
| 397 | } endfor_ifa(in_dev); |
| 398 | return NULL; |
| 399 | } |
| 400 | |
| 401 | static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 402 | { |
| 403 | struct rtattr **rta = arg; |
| 404 | struct in_device *in_dev; |
| 405 | struct ifaddrmsg *ifm = NLMSG_DATA(nlh); |
| 406 | struct in_ifaddr *ifa, **ifap; |
| 407 | |
| 408 | ASSERT_RTNL(); |
| 409 | |
| 410 | if ((in_dev = inetdev_by_index(ifm->ifa_index)) == NULL) |
| 411 | goto out; |
| 412 | __in_dev_put(in_dev); |
| 413 | |
| 414 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
| 415 | ifap = &ifa->ifa_next) { |
| 416 | if ((rta[IFA_LOCAL - 1] && |
| 417 | memcmp(RTA_DATA(rta[IFA_LOCAL - 1]), |
| 418 | &ifa->ifa_local, 4)) || |
| 419 | (rta[IFA_LABEL - 1] && |
| 420 | rtattr_strcmp(rta[IFA_LABEL - 1], ifa->ifa_label)) || |
| 421 | (rta[IFA_ADDRESS - 1] && |
| 422 | (ifm->ifa_prefixlen != ifa->ifa_prefixlen || |
| 423 | !inet_ifa_match(*(u32*)RTA_DATA(rta[IFA_ADDRESS - 1]), |
| 424 | ifa)))) |
| 425 | continue; |
| 426 | inet_del_ifa(in_dev, ifap, 1); |
| 427 | return 0; |
| 428 | } |
| 429 | out: |
| 430 | return -EADDRNOTAVAIL; |
| 431 | } |
| 432 | |
| 433 | static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 434 | { |
| 435 | struct rtattr **rta = arg; |
| 436 | struct net_device *dev; |
| 437 | struct in_device *in_dev; |
| 438 | struct ifaddrmsg *ifm = NLMSG_DATA(nlh); |
| 439 | struct in_ifaddr *ifa; |
| 440 | int rc = -EINVAL; |
| 441 | |
| 442 | ASSERT_RTNL(); |
| 443 | |
| 444 | if (ifm->ifa_prefixlen > 32 || !rta[IFA_LOCAL - 1]) |
| 445 | goto out; |
| 446 | |
| 447 | rc = -ENODEV; |
| 448 | if ((dev = __dev_get_by_index(ifm->ifa_index)) == NULL) |
| 449 | goto out; |
| 450 | |
| 451 | rc = -ENOBUFS; |
| 452 | if ((in_dev = __in_dev_get(dev)) == NULL) { |
| 453 | in_dev = inetdev_init(dev); |
| 454 | if (!in_dev) |
| 455 | goto out; |
| 456 | } |
| 457 | |
| 458 | if ((ifa = inet_alloc_ifa()) == NULL) |
| 459 | goto out; |
| 460 | |
| 461 | if (!rta[IFA_ADDRESS - 1]) |
| 462 | rta[IFA_ADDRESS - 1] = rta[IFA_LOCAL - 1]; |
| 463 | memcpy(&ifa->ifa_local, RTA_DATA(rta[IFA_LOCAL - 1]), 4); |
| 464 | memcpy(&ifa->ifa_address, RTA_DATA(rta[IFA_ADDRESS - 1]), 4); |
| 465 | ifa->ifa_prefixlen = ifm->ifa_prefixlen; |
| 466 | ifa->ifa_mask = inet_make_mask(ifm->ifa_prefixlen); |
| 467 | if (rta[IFA_BROADCAST - 1]) |
| 468 | memcpy(&ifa->ifa_broadcast, |
| 469 | RTA_DATA(rta[IFA_BROADCAST - 1]), 4); |
| 470 | if (rta[IFA_ANYCAST - 1]) |
| 471 | memcpy(&ifa->ifa_anycast, RTA_DATA(rta[IFA_ANYCAST - 1]), 4); |
| 472 | ifa->ifa_flags = ifm->ifa_flags; |
| 473 | ifa->ifa_scope = ifm->ifa_scope; |
| 474 | in_dev_hold(in_dev); |
| 475 | ifa->ifa_dev = in_dev; |
| 476 | if (rta[IFA_LABEL - 1]) |
| 477 | rtattr_strlcpy(ifa->ifa_label, rta[IFA_LABEL - 1], IFNAMSIZ); |
| 478 | else |
| 479 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 480 | |
| 481 | rc = inet_insert_ifa(ifa); |
| 482 | out: |
| 483 | return rc; |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * Determine a default network mask, based on the IP address. |
| 488 | */ |
| 489 | |
| 490 | static __inline__ int inet_abc_len(u32 addr) |
| 491 | { |
| 492 | int rc = -1; /* Something else, probably a multicast. */ |
| 493 | |
| 494 | if (ZERONET(addr)) |
| 495 | rc = 0; |
| 496 | else { |
| 497 | addr = ntohl(addr); |
| 498 | |
| 499 | if (IN_CLASSA(addr)) |
| 500 | rc = 8; |
| 501 | else if (IN_CLASSB(addr)) |
| 502 | rc = 16; |
| 503 | else if (IN_CLASSC(addr)) |
| 504 | rc = 24; |
| 505 | } |
| 506 | |
| 507 | return rc; |
| 508 | } |
| 509 | |
| 510 | |
| 511 | int devinet_ioctl(unsigned int cmd, void __user *arg) |
| 512 | { |
| 513 | struct ifreq ifr; |
| 514 | struct sockaddr_in sin_orig; |
| 515 | struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr; |
| 516 | struct in_device *in_dev; |
| 517 | struct in_ifaddr **ifap = NULL; |
| 518 | struct in_ifaddr *ifa = NULL; |
| 519 | struct net_device *dev; |
| 520 | char *colon; |
| 521 | int ret = -EFAULT; |
| 522 | int tryaddrmatch = 0; |
| 523 | |
| 524 | /* |
| 525 | * Fetch the caller's info block into kernel space |
| 526 | */ |
| 527 | |
| 528 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) |
| 529 | goto out; |
| 530 | ifr.ifr_name[IFNAMSIZ - 1] = 0; |
| 531 | |
| 532 | /* save original address for comparison */ |
| 533 | memcpy(&sin_orig, sin, sizeof(*sin)); |
| 534 | |
| 535 | colon = strchr(ifr.ifr_name, ':'); |
| 536 | if (colon) |
| 537 | *colon = 0; |
| 538 | |
| 539 | #ifdef CONFIG_KMOD |
| 540 | dev_load(ifr.ifr_name); |
| 541 | #endif |
| 542 | |
| 543 | switch(cmd) { |
| 544 | case SIOCGIFADDR: /* Get interface address */ |
| 545 | case SIOCGIFBRDADDR: /* Get the broadcast address */ |
| 546 | case SIOCGIFDSTADDR: /* Get the destination address */ |
| 547 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ |
| 548 | /* Note that these ioctls will not sleep, |
| 549 | so that we do not impose a lock. |
| 550 | One day we will be forced to put shlock here (I mean SMP) |
| 551 | */ |
| 552 | tryaddrmatch = (sin_orig.sin_family == AF_INET); |
| 553 | memset(sin, 0, sizeof(*sin)); |
| 554 | sin->sin_family = AF_INET; |
| 555 | break; |
| 556 | |
| 557 | case SIOCSIFFLAGS: |
| 558 | ret = -EACCES; |
| 559 | if (!capable(CAP_NET_ADMIN)) |
| 560 | goto out; |
| 561 | break; |
| 562 | case SIOCSIFADDR: /* Set interface address (and family) */ |
| 563 | case SIOCSIFBRDADDR: /* Set the broadcast address */ |
| 564 | case SIOCSIFDSTADDR: /* Set the destination address */ |
| 565 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ |
| 566 | ret = -EACCES; |
| 567 | if (!capable(CAP_NET_ADMIN)) |
| 568 | goto out; |
| 569 | ret = -EINVAL; |
| 570 | if (sin->sin_family != AF_INET) |
| 571 | goto out; |
| 572 | break; |
| 573 | default: |
| 574 | ret = -EINVAL; |
| 575 | goto out; |
| 576 | } |
| 577 | |
| 578 | rtnl_lock(); |
| 579 | |
| 580 | ret = -ENODEV; |
| 581 | if ((dev = __dev_get_by_name(ifr.ifr_name)) == NULL) |
| 582 | goto done; |
| 583 | |
| 584 | if (colon) |
| 585 | *colon = ':'; |
| 586 | |
| 587 | if ((in_dev = __in_dev_get(dev)) != NULL) { |
| 588 | if (tryaddrmatch) { |
| 589 | /* Matthias Andree */ |
| 590 | /* compare label and address (4.4BSD style) */ |
| 591 | /* note: we only do this for a limited set of ioctls |
| 592 | and only if the original address family was AF_INET. |
| 593 | This is checked above. */ |
| 594 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
| 595 | ifap = &ifa->ifa_next) { |
| 596 | if (!strcmp(ifr.ifr_name, ifa->ifa_label) && |
| 597 | sin_orig.sin_addr.s_addr == |
| 598 | ifa->ifa_address) { |
| 599 | break; /* found */ |
| 600 | } |
| 601 | } |
| 602 | } |
| 603 | /* we didn't get a match, maybe the application is |
| 604 | 4.3BSD-style and passed in junk so we fall back to |
| 605 | comparing just the label */ |
| 606 | if (!ifa) { |
| 607 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
| 608 | ifap = &ifa->ifa_next) |
| 609 | if (!strcmp(ifr.ifr_name, ifa->ifa_label)) |
| 610 | break; |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | ret = -EADDRNOTAVAIL; |
| 615 | if (!ifa && cmd != SIOCSIFADDR && cmd != SIOCSIFFLAGS) |
| 616 | goto done; |
| 617 | |
| 618 | switch(cmd) { |
| 619 | case SIOCGIFADDR: /* Get interface address */ |
| 620 | sin->sin_addr.s_addr = ifa->ifa_local; |
| 621 | goto rarok; |
| 622 | |
| 623 | case SIOCGIFBRDADDR: /* Get the broadcast address */ |
| 624 | sin->sin_addr.s_addr = ifa->ifa_broadcast; |
| 625 | goto rarok; |
| 626 | |
| 627 | case SIOCGIFDSTADDR: /* Get the destination address */ |
| 628 | sin->sin_addr.s_addr = ifa->ifa_address; |
| 629 | goto rarok; |
| 630 | |
| 631 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ |
| 632 | sin->sin_addr.s_addr = ifa->ifa_mask; |
| 633 | goto rarok; |
| 634 | |
| 635 | case SIOCSIFFLAGS: |
| 636 | if (colon) { |
| 637 | ret = -EADDRNOTAVAIL; |
| 638 | if (!ifa) |
| 639 | break; |
| 640 | ret = 0; |
| 641 | if (!(ifr.ifr_flags & IFF_UP)) |
| 642 | inet_del_ifa(in_dev, ifap, 1); |
| 643 | break; |
| 644 | } |
| 645 | ret = dev_change_flags(dev, ifr.ifr_flags); |
| 646 | break; |
| 647 | |
| 648 | case SIOCSIFADDR: /* Set interface address (and family) */ |
| 649 | ret = -EINVAL; |
| 650 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) |
| 651 | break; |
| 652 | |
| 653 | if (!ifa) { |
| 654 | ret = -ENOBUFS; |
| 655 | if ((ifa = inet_alloc_ifa()) == NULL) |
| 656 | break; |
| 657 | if (colon) |
| 658 | memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ); |
| 659 | else |
| 660 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 661 | } else { |
| 662 | ret = 0; |
| 663 | if (ifa->ifa_local == sin->sin_addr.s_addr) |
| 664 | break; |
| 665 | inet_del_ifa(in_dev, ifap, 0); |
| 666 | ifa->ifa_broadcast = 0; |
| 667 | ifa->ifa_anycast = 0; |
| 668 | } |
| 669 | |
| 670 | ifa->ifa_address = ifa->ifa_local = sin->sin_addr.s_addr; |
| 671 | |
| 672 | if (!(dev->flags & IFF_POINTOPOINT)) { |
| 673 | ifa->ifa_prefixlen = inet_abc_len(ifa->ifa_address); |
| 674 | ifa->ifa_mask = inet_make_mask(ifa->ifa_prefixlen); |
| 675 | if ((dev->flags & IFF_BROADCAST) && |
| 676 | ifa->ifa_prefixlen < 31) |
| 677 | ifa->ifa_broadcast = ifa->ifa_address | |
| 678 | ~ifa->ifa_mask; |
| 679 | } else { |
| 680 | ifa->ifa_prefixlen = 32; |
| 681 | ifa->ifa_mask = inet_make_mask(32); |
| 682 | } |
| 683 | ret = inet_set_ifa(dev, ifa); |
| 684 | break; |
| 685 | |
| 686 | case SIOCSIFBRDADDR: /* Set the broadcast address */ |
| 687 | ret = 0; |
| 688 | if (ifa->ifa_broadcast != sin->sin_addr.s_addr) { |
| 689 | inet_del_ifa(in_dev, ifap, 0); |
| 690 | ifa->ifa_broadcast = sin->sin_addr.s_addr; |
| 691 | inet_insert_ifa(ifa); |
| 692 | } |
| 693 | break; |
| 694 | |
| 695 | case SIOCSIFDSTADDR: /* Set the destination address */ |
| 696 | ret = 0; |
| 697 | if (ifa->ifa_address == sin->sin_addr.s_addr) |
| 698 | break; |
| 699 | ret = -EINVAL; |
| 700 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) |
| 701 | break; |
| 702 | ret = 0; |
| 703 | inet_del_ifa(in_dev, ifap, 0); |
| 704 | ifa->ifa_address = sin->sin_addr.s_addr; |
| 705 | inet_insert_ifa(ifa); |
| 706 | break; |
| 707 | |
| 708 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ |
| 709 | |
| 710 | /* |
| 711 | * The mask we set must be legal. |
| 712 | */ |
| 713 | ret = -EINVAL; |
| 714 | if (bad_mask(sin->sin_addr.s_addr, 0)) |
| 715 | break; |
| 716 | ret = 0; |
| 717 | if (ifa->ifa_mask != sin->sin_addr.s_addr) { |
| 718 | inet_del_ifa(in_dev, ifap, 0); |
| 719 | ifa->ifa_mask = sin->sin_addr.s_addr; |
| 720 | ifa->ifa_prefixlen = inet_mask_len(ifa->ifa_mask); |
| 721 | |
| 722 | /* See if current broadcast address matches |
| 723 | * with current netmask, then recalculate |
| 724 | * the broadcast address. Otherwise it's a |
| 725 | * funny address, so don't touch it since |
| 726 | * the user seems to know what (s)he's doing... |
| 727 | */ |
| 728 | if ((dev->flags & IFF_BROADCAST) && |
| 729 | (ifa->ifa_prefixlen < 31) && |
| 730 | (ifa->ifa_broadcast == |
| 731 | (ifa->ifa_local|~ifa->ifa_mask))) { |
| 732 | ifa->ifa_broadcast = (ifa->ifa_local | |
| 733 | ~sin->sin_addr.s_addr); |
| 734 | } |
| 735 | inet_insert_ifa(ifa); |
| 736 | } |
| 737 | break; |
| 738 | } |
| 739 | done: |
| 740 | rtnl_unlock(); |
| 741 | out: |
| 742 | return ret; |
| 743 | rarok: |
| 744 | rtnl_unlock(); |
| 745 | ret = copy_to_user(arg, &ifr, sizeof(struct ifreq)) ? -EFAULT : 0; |
| 746 | goto out; |
| 747 | } |
| 748 | |
| 749 | static int inet_gifconf(struct net_device *dev, char __user *buf, int len) |
| 750 | { |
| 751 | struct in_device *in_dev = __in_dev_get(dev); |
| 752 | struct in_ifaddr *ifa; |
| 753 | struct ifreq ifr; |
| 754 | int done = 0; |
| 755 | |
| 756 | if (!in_dev || (ifa = in_dev->ifa_list) == NULL) |
| 757 | goto out; |
| 758 | |
| 759 | for (; ifa; ifa = ifa->ifa_next) { |
| 760 | if (!buf) { |
| 761 | done += sizeof(ifr); |
| 762 | continue; |
| 763 | } |
| 764 | if (len < (int) sizeof(ifr)) |
| 765 | break; |
| 766 | memset(&ifr, 0, sizeof(struct ifreq)); |
| 767 | if (ifa->ifa_label) |
| 768 | strcpy(ifr.ifr_name, ifa->ifa_label); |
| 769 | else |
| 770 | strcpy(ifr.ifr_name, dev->name); |
| 771 | |
| 772 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_family = AF_INET; |
| 773 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_addr.s_addr = |
| 774 | ifa->ifa_local; |
| 775 | |
| 776 | if (copy_to_user(buf, &ifr, sizeof(struct ifreq))) { |
| 777 | done = -EFAULT; |
| 778 | break; |
| 779 | } |
| 780 | buf += sizeof(struct ifreq); |
| 781 | len -= sizeof(struct ifreq); |
| 782 | done += sizeof(struct ifreq); |
| 783 | } |
| 784 | out: |
| 785 | return done; |
| 786 | } |
| 787 | |
| 788 | u32 inet_select_addr(const struct net_device *dev, u32 dst, int scope) |
| 789 | { |
| 790 | u32 addr = 0; |
| 791 | struct in_device *in_dev; |
| 792 | |
| 793 | rcu_read_lock(); |
| 794 | in_dev = __in_dev_get(dev); |
| 795 | if (!in_dev) |
| 796 | goto no_in_dev; |
| 797 | |
| 798 | for_primary_ifa(in_dev) { |
| 799 | if (ifa->ifa_scope > scope) |
| 800 | continue; |
| 801 | if (!dst || inet_ifa_match(dst, ifa)) { |
| 802 | addr = ifa->ifa_local; |
| 803 | break; |
| 804 | } |
| 805 | if (!addr) |
| 806 | addr = ifa->ifa_local; |
| 807 | } endfor_ifa(in_dev); |
| 808 | no_in_dev: |
| 809 | rcu_read_unlock(); |
| 810 | |
| 811 | if (addr) |
| 812 | goto out; |
| 813 | |
| 814 | /* Not loopback addresses on loopback should be preferred |
| 815 | in this case. It is importnat that lo is the first interface |
| 816 | in dev_base list. |
| 817 | */ |
| 818 | read_lock(&dev_base_lock); |
| 819 | rcu_read_lock(); |
| 820 | for (dev = dev_base; dev; dev = dev->next) { |
| 821 | if ((in_dev = __in_dev_get(dev)) == NULL) |
| 822 | continue; |
| 823 | |
| 824 | for_primary_ifa(in_dev) { |
| 825 | if (ifa->ifa_scope != RT_SCOPE_LINK && |
| 826 | ifa->ifa_scope <= scope) { |
| 827 | addr = ifa->ifa_local; |
| 828 | goto out_unlock_both; |
| 829 | } |
| 830 | } endfor_ifa(in_dev); |
| 831 | } |
| 832 | out_unlock_both: |
| 833 | read_unlock(&dev_base_lock); |
| 834 | rcu_read_unlock(); |
| 835 | out: |
| 836 | return addr; |
| 837 | } |
| 838 | |
| 839 | static u32 confirm_addr_indev(struct in_device *in_dev, u32 dst, |
| 840 | u32 local, int scope) |
| 841 | { |
| 842 | int same = 0; |
| 843 | u32 addr = 0; |
| 844 | |
| 845 | for_ifa(in_dev) { |
| 846 | if (!addr && |
| 847 | (local == ifa->ifa_local || !local) && |
| 848 | ifa->ifa_scope <= scope) { |
| 849 | addr = ifa->ifa_local; |
| 850 | if (same) |
| 851 | break; |
| 852 | } |
| 853 | if (!same) { |
| 854 | same = (!local || inet_ifa_match(local, ifa)) && |
| 855 | (!dst || inet_ifa_match(dst, ifa)); |
| 856 | if (same && addr) { |
| 857 | if (local || !dst) |
| 858 | break; |
| 859 | /* Is the selected addr into dst subnet? */ |
| 860 | if (inet_ifa_match(addr, ifa)) |
| 861 | break; |
| 862 | /* No, then can we use new local src? */ |
| 863 | if (ifa->ifa_scope <= scope) { |
| 864 | addr = ifa->ifa_local; |
| 865 | break; |
| 866 | } |
| 867 | /* search for large dst subnet for addr */ |
| 868 | same = 0; |
| 869 | } |
| 870 | } |
| 871 | } endfor_ifa(in_dev); |
| 872 | |
| 873 | return same? addr : 0; |
| 874 | } |
| 875 | |
| 876 | /* |
| 877 | * Confirm that local IP address exists using wildcards: |
| 878 | * - dev: only on this interface, 0=any interface |
| 879 | * - dst: only in the same subnet as dst, 0=any dst |
| 880 | * - local: address, 0=autoselect the local address |
| 881 | * - scope: maximum allowed scope value for the local address |
| 882 | */ |
| 883 | u32 inet_confirm_addr(const struct net_device *dev, u32 dst, u32 local, int scope) |
| 884 | { |
| 885 | u32 addr = 0; |
| 886 | struct in_device *in_dev; |
| 887 | |
| 888 | if (dev) { |
| 889 | rcu_read_lock(); |
| 890 | if ((in_dev = __in_dev_get(dev))) |
| 891 | addr = confirm_addr_indev(in_dev, dst, local, scope); |
| 892 | rcu_read_unlock(); |
| 893 | |
| 894 | return addr; |
| 895 | } |
| 896 | |
| 897 | read_lock(&dev_base_lock); |
| 898 | rcu_read_lock(); |
| 899 | for (dev = dev_base; dev; dev = dev->next) { |
| 900 | if ((in_dev = __in_dev_get(dev))) { |
| 901 | addr = confirm_addr_indev(in_dev, dst, local, scope); |
| 902 | if (addr) |
| 903 | break; |
| 904 | } |
| 905 | } |
| 906 | rcu_read_unlock(); |
| 907 | read_unlock(&dev_base_lock); |
| 908 | |
| 909 | return addr; |
| 910 | } |
| 911 | |
| 912 | /* |
| 913 | * Device notifier |
| 914 | */ |
| 915 | |
| 916 | int register_inetaddr_notifier(struct notifier_block *nb) |
| 917 | { |
| 918 | return notifier_chain_register(&inetaddr_chain, nb); |
| 919 | } |
| 920 | |
| 921 | int unregister_inetaddr_notifier(struct notifier_block *nb) |
| 922 | { |
| 923 | return notifier_chain_unregister(&inetaddr_chain, nb); |
| 924 | } |
| 925 | |
| 926 | /* Rename ifa_labels for a device name change. Make some effort to preserve existing |
| 927 | * alias numbering and to create unique labels if possible. |
| 928 | */ |
| 929 | static void inetdev_changename(struct net_device *dev, struct in_device *in_dev) |
| 930 | { |
| 931 | struct in_ifaddr *ifa; |
| 932 | int named = 0; |
| 933 | |
| 934 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
| 935 | char old[IFNAMSIZ], *dot; |
| 936 | |
| 937 | memcpy(old, ifa->ifa_label, IFNAMSIZ); |
| 938 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 939 | if (named++ == 0) |
| 940 | continue; |
| 941 | dot = strchr(ifa->ifa_label, ':'); |
| 942 | if (dot == NULL) { |
| 943 | sprintf(old, ":%d", named); |
| 944 | dot = old; |
| 945 | } |
| 946 | if (strlen(dot) + strlen(dev->name) < IFNAMSIZ) { |
| 947 | strcat(ifa->ifa_label, dot); |
| 948 | } else { |
| 949 | strcpy(ifa->ifa_label + (IFNAMSIZ - strlen(dot) - 1), dot); |
| 950 | } |
| 951 | } |
| 952 | } |
| 953 | |
| 954 | /* Called only under RTNL semaphore */ |
| 955 | |
| 956 | static int inetdev_event(struct notifier_block *this, unsigned long event, |
| 957 | void *ptr) |
| 958 | { |
| 959 | struct net_device *dev = ptr; |
| 960 | struct in_device *in_dev = __in_dev_get(dev); |
| 961 | |
| 962 | ASSERT_RTNL(); |
| 963 | |
| 964 | if (!in_dev) { |
| 965 | if (event == NETDEV_REGISTER && dev == &loopback_dev) { |
| 966 | in_dev = inetdev_init(dev); |
| 967 | if (!in_dev) |
| 968 | panic("devinet: Failed to create loopback\n"); |
| 969 | in_dev->cnf.no_xfrm = 1; |
| 970 | in_dev->cnf.no_policy = 1; |
| 971 | } |
| 972 | goto out; |
| 973 | } |
| 974 | |
| 975 | switch (event) { |
| 976 | case NETDEV_REGISTER: |
| 977 | printk(KERN_DEBUG "inetdev_event: bug\n"); |
| 978 | dev->ip_ptr = NULL; |
| 979 | break; |
| 980 | case NETDEV_UP: |
| 981 | if (dev->mtu < 68) |
| 982 | break; |
| 983 | if (dev == &loopback_dev) { |
| 984 | struct in_ifaddr *ifa; |
| 985 | if ((ifa = inet_alloc_ifa()) != NULL) { |
| 986 | ifa->ifa_local = |
| 987 | ifa->ifa_address = htonl(INADDR_LOOPBACK); |
| 988 | ifa->ifa_prefixlen = 8; |
| 989 | ifa->ifa_mask = inet_make_mask(8); |
| 990 | in_dev_hold(in_dev); |
| 991 | ifa->ifa_dev = in_dev; |
| 992 | ifa->ifa_scope = RT_SCOPE_HOST; |
| 993 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 994 | inet_insert_ifa(ifa); |
| 995 | } |
| 996 | } |
| 997 | ip_mc_up(in_dev); |
| 998 | break; |
| 999 | case NETDEV_DOWN: |
| 1000 | ip_mc_down(in_dev); |
| 1001 | break; |
| 1002 | case NETDEV_CHANGEMTU: |
| 1003 | if (dev->mtu >= 68) |
| 1004 | break; |
| 1005 | /* MTU falled under 68, disable IP */ |
| 1006 | case NETDEV_UNREGISTER: |
| 1007 | inetdev_destroy(in_dev); |
| 1008 | break; |
| 1009 | case NETDEV_CHANGENAME: |
| 1010 | /* Do not notify about label change, this event is |
| 1011 | * not interesting to applications using netlink. |
| 1012 | */ |
| 1013 | inetdev_changename(dev, in_dev); |
| 1014 | |
| 1015 | #ifdef CONFIG_SYSCTL |
| 1016 | devinet_sysctl_unregister(&in_dev->cnf); |
| 1017 | neigh_sysctl_unregister(in_dev->arp_parms); |
| 1018 | neigh_sysctl_register(dev, in_dev->arp_parms, NET_IPV4, |
| 1019 | NET_IPV4_NEIGH, "ipv4", NULL, NULL); |
| 1020 | devinet_sysctl_register(in_dev, &in_dev->cnf); |
| 1021 | #endif |
| 1022 | break; |
| 1023 | } |
| 1024 | out: |
| 1025 | return NOTIFY_DONE; |
| 1026 | } |
| 1027 | |
| 1028 | static struct notifier_block ip_netdev_notifier = { |
| 1029 | .notifier_call =inetdev_event, |
| 1030 | }; |
| 1031 | |
| 1032 | static int inet_fill_ifaddr(struct sk_buff *skb, struct in_ifaddr *ifa, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 1033 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | { |
| 1035 | struct ifaddrmsg *ifm; |
| 1036 | struct nlmsghdr *nlh; |
| 1037 | unsigned char *b = skb->tail; |
| 1038 | |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 1039 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | ifm = NLMSG_DATA(nlh); |
| 1041 | ifm->ifa_family = AF_INET; |
| 1042 | ifm->ifa_prefixlen = ifa->ifa_prefixlen; |
| 1043 | ifm->ifa_flags = ifa->ifa_flags|IFA_F_PERMANENT; |
| 1044 | ifm->ifa_scope = ifa->ifa_scope; |
| 1045 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; |
| 1046 | if (ifa->ifa_address) |
| 1047 | RTA_PUT(skb, IFA_ADDRESS, 4, &ifa->ifa_address); |
| 1048 | if (ifa->ifa_local) |
| 1049 | RTA_PUT(skb, IFA_LOCAL, 4, &ifa->ifa_local); |
| 1050 | if (ifa->ifa_broadcast) |
| 1051 | RTA_PUT(skb, IFA_BROADCAST, 4, &ifa->ifa_broadcast); |
| 1052 | if (ifa->ifa_anycast) |
| 1053 | RTA_PUT(skb, IFA_ANYCAST, 4, &ifa->ifa_anycast); |
| 1054 | if (ifa->ifa_label[0]) |
| 1055 | RTA_PUT(skb, IFA_LABEL, IFNAMSIZ, &ifa->ifa_label); |
| 1056 | nlh->nlmsg_len = skb->tail - b; |
| 1057 | return skb->len; |
| 1058 | |
| 1059 | nlmsg_failure: |
| 1060 | rtattr_failure: |
| 1061 | skb_trim(skb, b - skb->data); |
| 1062 | return -1; |
| 1063 | } |
| 1064 | |
| 1065 | static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 1066 | { |
| 1067 | int idx, ip_idx; |
| 1068 | struct net_device *dev; |
| 1069 | struct in_device *in_dev; |
| 1070 | struct in_ifaddr *ifa; |
| 1071 | int s_ip_idx, s_idx = cb->args[0]; |
| 1072 | |
| 1073 | s_ip_idx = ip_idx = cb->args[1]; |
| 1074 | read_lock(&dev_base_lock); |
| 1075 | for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) { |
| 1076 | if (idx < s_idx) |
| 1077 | continue; |
| 1078 | if (idx > s_idx) |
| 1079 | s_ip_idx = 0; |
| 1080 | rcu_read_lock(); |
| 1081 | if ((in_dev = __in_dev_get(dev)) == NULL) { |
| 1082 | rcu_read_unlock(); |
| 1083 | continue; |
| 1084 | } |
| 1085 | |
| 1086 | for (ifa = in_dev->ifa_list, ip_idx = 0; ifa; |
| 1087 | ifa = ifa->ifa_next, ip_idx++) { |
| 1088 | if (ip_idx < s_ip_idx) |
| 1089 | continue; |
| 1090 | if (inet_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid, |
| 1091 | cb->nlh->nlmsg_seq, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 1092 | RTM_NEWADDR, NLM_F_MULTI) <= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | rcu_read_unlock(); |
| 1094 | goto done; |
| 1095 | } |
| 1096 | } |
| 1097 | rcu_read_unlock(); |
| 1098 | } |
| 1099 | |
| 1100 | done: |
| 1101 | read_unlock(&dev_base_lock); |
| 1102 | cb->args[0] = idx; |
| 1103 | cb->args[1] = ip_idx; |
| 1104 | |
| 1105 | return skb->len; |
| 1106 | } |
| 1107 | |
| 1108 | static void rtmsg_ifa(int event, struct in_ifaddr* ifa) |
| 1109 | { |
| 1110 | int size = NLMSG_SPACE(sizeof(struct ifaddrmsg) + 128); |
| 1111 | struct sk_buff *skb = alloc_skb(size, GFP_KERNEL); |
| 1112 | |
| 1113 | if (!skb) |
Patrick McHardy | ac6d439 | 2005-08-14 19:29:52 -0700 | [diff] [blame] | 1114 | netlink_set_err(rtnl, 0, RTNLGRP_IPV4_IFADDR, ENOBUFS); |
Jamal Hadi Salim | 9ed19f3 | 2005-06-18 22:55:51 -0700 | [diff] [blame] | 1115 | else if (inet_fill_ifaddr(skb, ifa, current->pid, 0, event, 0) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | kfree_skb(skb); |
Patrick McHardy | ac6d439 | 2005-08-14 19:29:52 -0700 | [diff] [blame] | 1117 | netlink_set_err(rtnl, 0, RTNLGRP_IPV4_IFADDR, EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | } else { |
Patrick McHardy | ac6d439 | 2005-08-14 19:29:52 -0700 | [diff] [blame] | 1119 | netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV4_IFADDR, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | } |
| 1121 | } |
| 1122 | |
Thomas Graf | db46edc | 2005-05-03 14:29:39 -0700 | [diff] [blame] | 1123 | static struct rtnetlink_link inet_rtnetlink_table[RTM_NR_MSGTYPES] = { |
| 1124 | [RTM_NEWADDR - RTM_BASE] = { .doit = inet_rtm_newaddr, }, |
| 1125 | [RTM_DELADDR - RTM_BASE] = { .doit = inet_rtm_deladdr, }, |
| 1126 | [RTM_GETADDR - RTM_BASE] = { .dumpit = inet_dump_ifaddr, }, |
| 1127 | [RTM_NEWROUTE - RTM_BASE] = { .doit = inet_rtm_newroute, }, |
| 1128 | [RTM_DELROUTE - RTM_BASE] = { .doit = inet_rtm_delroute, }, |
| 1129 | [RTM_GETROUTE - RTM_BASE] = { .doit = inet_rtm_getroute, |
| 1130 | .dumpit = inet_dump_fib, }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
Thomas Graf | db46edc | 2005-05-03 14:29:39 -0700 | [diff] [blame] | 1132 | [RTM_NEWRULE - RTM_BASE] = { .doit = inet_rtm_newrule, }, |
| 1133 | [RTM_DELRULE - RTM_BASE] = { .doit = inet_rtm_delrule, }, |
| 1134 | [RTM_GETRULE - RTM_BASE] = { .dumpit = inet_dump_rules, }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | #endif |
| 1136 | }; |
| 1137 | |
| 1138 | #ifdef CONFIG_SYSCTL |
| 1139 | |
| 1140 | void inet_forward_change(void) |
| 1141 | { |
| 1142 | struct net_device *dev; |
| 1143 | int on = ipv4_devconf.forwarding; |
| 1144 | |
| 1145 | ipv4_devconf.accept_redirects = !on; |
| 1146 | ipv4_devconf_dflt.forwarding = on; |
| 1147 | |
| 1148 | read_lock(&dev_base_lock); |
| 1149 | for (dev = dev_base; dev; dev = dev->next) { |
| 1150 | struct in_device *in_dev; |
| 1151 | rcu_read_lock(); |
| 1152 | in_dev = __in_dev_get(dev); |
| 1153 | if (in_dev) |
| 1154 | in_dev->cnf.forwarding = on; |
| 1155 | rcu_read_unlock(); |
| 1156 | } |
| 1157 | read_unlock(&dev_base_lock); |
| 1158 | |
| 1159 | rt_cache_flush(0); |
| 1160 | } |
| 1161 | |
| 1162 | static int devinet_sysctl_forward(ctl_table *ctl, int write, |
| 1163 | struct file* filp, void __user *buffer, |
| 1164 | size_t *lenp, loff_t *ppos) |
| 1165 | { |
| 1166 | int *valp = ctl->data; |
| 1167 | int val = *valp; |
| 1168 | int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); |
| 1169 | |
| 1170 | if (write && *valp != val) { |
| 1171 | if (valp == &ipv4_devconf.forwarding) |
| 1172 | inet_forward_change(); |
| 1173 | else if (valp != &ipv4_devconf_dflt.forwarding) |
| 1174 | rt_cache_flush(0); |
| 1175 | } |
| 1176 | |
| 1177 | return ret; |
| 1178 | } |
| 1179 | |
| 1180 | int ipv4_doint_and_flush(ctl_table *ctl, int write, |
| 1181 | struct file* filp, void __user *buffer, |
| 1182 | size_t *lenp, loff_t *ppos) |
| 1183 | { |
| 1184 | int *valp = ctl->data; |
| 1185 | int val = *valp; |
| 1186 | int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); |
| 1187 | |
| 1188 | if (write && *valp != val) |
| 1189 | rt_cache_flush(0); |
| 1190 | |
| 1191 | return ret; |
| 1192 | } |
| 1193 | |
| 1194 | int ipv4_doint_and_flush_strategy(ctl_table *table, int __user *name, int nlen, |
| 1195 | void __user *oldval, size_t __user *oldlenp, |
| 1196 | void __user *newval, size_t newlen, |
| 1197 | void **context) |
| 1198 | { |
| 1199 | int *valp = table->data; |
| 1200 | int new; |
| 1201 | |
| 1202 | if (!newval || !newlen) |
| 1203 | return 0; |
| 1204 | |
| 1205 | if (newlen != sizeof(int)) |
| 1206 | return -EINVAL; |
| 1207 | |
| 1208 | if (get_user(new, (int __user *)newval)) |
| 1209 | return -EFAULT; |
| 1210 | |
| 1211 | if (new == *valp) |
| 1212 | return 0; |
| 1213 | |
| 1214 | if (oldval && oldlenp) { |
| 1215 | size_t len; |
| 1216 | |
| 1217 | if (get_user(len, oldlenp)) |
| 1218 | return -EFAULT; |
| 1219 | |
| 1220 | if (len) { |
| 1221 | if (len > table->maxlen) |
| 1222 | len = table->maxlen; |
| 1223 | if (copy_to_user(oldval, valp, len)) |
| 1224 | return -EFAULT; |
| 1225 | if (put_user(len, oldlenp)) |
| 1226 | return -EFAULT; |
| 1227 | } |
| 1228 | } |
| 1229 | |
| 1230 | *valp = new; |
| 1231 | rt_cache_flush(0); |
| 1232 | return 1; |
| 1233 | } |
| 1234 | |
| 1235 | |
| 1236 | static struct devinet_sysctl_table { |
| 1237 | struct ctl_table_header *sysctl_header; |
| 1238 | ctl_table devinet_vars[__NET_IPV4_CONF_MAX]; |
| 1239 | ctl_table devinet_dev[2]; |
| 1240 | ctl_table devinet_conf_dir[2]; |
| 1241 | ctl_table devinet_proto_dir[2]; |
| 1242 | ctl_table devinet_root_dir[2]; |
| 1243 | } devinet_sysctl = { |
| 1244 | .devinet_vars = { |
| 1245 | { |
| 1246 | .ctl_name = NET_IPV4_CONF_FORWARDING, |
| 1247 | .procname = "forwarding", |
| 1248 | .data = &ipv4_devconf.forwarding, |
| 1249 | .maxlen = sizeof(int), |
| 1250 | .mode = 0644, |
| 1251 | .proc_handler = &devinet_sysctl_forward, |
| 1252 | }, |
| 1253 | { |
| 1254 | .ctl_name = NET_IPV4_CONF_MC_FORWARDING, |
| 1255 | .procname = "mc_forwarding", |
| 1256 | .data = &ipv4_devconf.mc_forwarding, |
| 1257 | .maxlen = sizeof(int), |
| 1258 | .mode = 0444, |
| 1259 | .proc_handler = &proc_dointvec, |
| 1260 | }, |
| 1261 | { |
| 1262 | .ctl_name = NET_IPV4_CONF_ACCEPT_REDIRECTS, |
| 1263 | .procname = "accept_redirects", |
| 1264 | .data = &ipv4_devconf.accept_redirects, |
| 1265 | .maxlen = sizeof(int), |
| 1266 | .mode = 0644, |
| 1267 | .proc_handler = &proc_dointvec, |
| 1268 | }, |
| 1269 | { |
| 1270 | .ctl_name = NET_IPV4_CONF_SECURE_REDIRECTS, |
| 1271 | .procname = "secure_redirects", |
| 1272 | .data = &ipv4_devconf.secure_redirects, |
| 1273 | .maxlen = sizeof(int), |
| 1274 | .mode = 0644, |
| 1275 | .proc_handler = &proc_dointvec, |
| 1276 | }, |
| 1277 | { |
| 1278 | .ctl_name = NET_IPV4_CONF_SHARED_MEDIA, |
| 1279 | .procname = "shared_media", |
| 1280 | .data = &ipv4_devconf.shared_media, |
| 1281 | .maxlen = sizeof(int), |
| 1282 | .mode = 0644, |
| 1283 | .proc_handler = &proc_dointvec, |
| 1284 | }, |
| 1285 | { |
| 1286 | .ctl_name = NET_IPV4_CONF_RP_FILTER, |
| 1287 | .procname = "rp_filter", |
| 1288 | .data = &ipv4_devconf.rp_filter, |
| 1289 | .maxlen = sizeof(int), |
| 1290 | .mode = 0644, |
| 1291 | .proc_handler = &proc_dointvec, |
| 1292 | }, |
| 1293 | { |
| 1294 | .ctl_name = NET_IPV4_CONF_SEND_REDIRECTS, |
| 1295 | .procname = "send_redirects", |
| 1296 | .data = &ipv4_devconf.send_redirects, |
| 1297 | .maxlen = sizeof(int), |
| 1298 | .mode = 0644, |
| 1299 | .proc_handler = &proc_dointvec, |
| 1300 | }, |
| 1301 | { |
| 1302 | .ctl_name = NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE, |
| 1303 | .procname = "accept_source_route", |
| 1304 | .data = &ipv4_devconf.accept_source_route, |
| 1305 | .maxlen = sizeof(int), |
| 1306 | .mode = 0644, |
| 1307 | .proc_handler = &proc_dointvec, |
| 1308 | }, |
| 1309 | { |
| 1310 | .ctl_name = NET_IPV4_CONF_PROXY_ARP, |
| 1311 | .procname = "proxy_arp", |
| 1312 | .data = &ipv4_devconf.proxy_arp, |
| 1313 | .maxlen = sizeof(int), |
| 1314 | .mode = 0644, |
| 1315 | .proc_handler = &proc_dointvec, |
| 1316 | }, |
| 1317 | { |
| 1318 | .ctl_name = NET_IPV4_CONF_MEDIUM_ID, |
| 1319 | .procname = "medium_id", |
| 1320 | .data = &ipv4_devconf.medium_id, |
| 1321 | .maxlen = sizeof(int), |
| 1322 | .mode = 0644, |
| 1323 | .proc_handler = &proc_dointvec, |
| 1324 | }, |
| 1325 | { |
| 1326 | .ctl_name = NET_IPV4_CONF_BOOTP_RELAY, |
| 1327 | .procname = "bootp_relay", |
| 1328 | .data = &ipv4_devconf.bootp_relay, |
| 1329 | .maxlen = sizeof(int), |
| 1330 | .mode = 0644, |
| 1331 | .proc_handler = &proc_dointvec, |
| 1332 | }, |
| 1333 | { |
| 1334 | .ctl_name = NET_IPV4_CONF_LOG_MARTIANS, |
| 1335 | .procname = "log_martians", |
| 1336 | .data = &ipv4_devconf.log_martians, |
| 1337 | .maxlen = sizeof(int), |
| 1338 | .mode = 0644, |
| 1339 | .proc_handler = &proc_dointvec, |
| 1340 | }, |
| 1341 | { |
| 1342 | .ctl_name = NET_IPV4_CONF_TAG, |
| 1343 | .procname = "tag", |
| 1344 | .data = &ipv4_devconf.tag, |
| 1345 | .maxlen = sizeof(int), |
| 1346 | .mode = 0644, |
| 1347 | .proc_handler = &proc_dointvec, |
| 1348 | }, |
| 1349 | { |
| 1350 | .ctl_name = NET_IPV4_CONF_ARPFILTER, |
| 1351 | .procname = "arp_filter", |
| 1352 | .data = &ipv4_devconf.arp_filter, |
| 1353 | .maxlen = sizeof(int), |
| 1354 | .mode = 0644, |
| 1355 | .proc_handler = &proc_dointvec, |
| 1356 | }, |
| 1357 | { |
| 1358 | .ctl_name = NET_IPV4_CONF_ARP_ANNOUNCE, |
| 1359 | .procname = "arp_announce", |
| 1360 | .data = &ipv4_devconf.arp_announce, |
| 1361 | .maxlen = sizeof(int), |
| 1362 | .mode = 0644, |
| 1363 | .proc_handler = &proc_dointvec, |
| 1364 | }, |
| 1365 | { |
| 1366 | .ctl_name = NET_IPV4_CONF_ARP_IGNORE, |
| 1367 | .procname = "arp_ignore", |
| 1368 | .data = &ipv4_devconf.arp_ignore, |
| 1369 | .maxlen = sizeof(int), |
| 1370 | .mode = 0644, |
| 1371 | .proc_handler = &proc_dointvec, |
| 1372 | }, |
| 1373 | { |
| 1374 | .ctl_name = NET_IPV4_CONF_NOXFRM, |
| 1375 | .procname = "disable_xfrm", |
| 1376 | .data = &ipv4_devconf.no_xfrm, |
| 1377 | .maxlen = sizeof(int), |
| 1378 | .mode = 0644, |
| 1379 | .proc_handler = &ipv4_doint_and_flush, |
| 1380 | .strategy = &ipv4_doint_and_flush_strategy, |
| 1381 | }, |
| 1382 | { |
| 1383 | .ctl_name = NET_IPV4_CONF_NOPOLICY, |
| 1384 | .procname = "disable_policy", |
| 1385 | .data = &ipv4_devconf.no_policy, |
| 1386 | .maxlen = sizeof(int), |
| 1387 | .mode = 0644, |
| 1388 | .proc_handler = &ipv4_doint_and_flush, |
| 1389 | .strategy = &ipv4_doint_and_flush_strategy, |
| 1390 | }, |
| 1391 | { |
| 1392 | .ctl_name = NET_IPV4_CONF_FORCE_IGMP_VERSION, |
| 1393 | .procname = "force_igmp_version", |
| 1394 | .data = &ipv4_devconf.force_igmp_version, |
| 1395 | .maxlen = sizeof(int), |
| 1396 | .mode = 0644, |
| 1397 | .proc_handler = &ipv4_doint_and_flush, |
| 1398 | .strategy = &ipv4_doint_and_flush_strategy, |
| 1399 | }, |
Harald Welte | 8f937c6 | 2005-05-29 20:23:46 -0700 | [diff] [blame] | 1400 | { |
| 1401 | .ctl_name = NET_IPV4_CONF_PROMOTE_SECONDARIES, |
| 1402 | .procname = "promote_secondaries", |
| 1403 | .data = &ipv4_devconf.promote_secondaries, |
| 1404 | .maxlen = sizeof(int), |
| 1405 | .mode = 0644, |
| 1406 | .proc_handler = &ipv4_doint_and_flush, |
| 1407 | .strategy = &ipv4_doint_and_flush_strategy, |
| 1408 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | }, |
| 1410 | .devinet_dev = { |
| 1411 | { |
| 1412 | .ctl_name = NET_PROTO_CONF_ALL, |
| 1413 | .procname = "all", |
| 1414 | .mode = 0555, |
| 1415 | .child = devinet_sysctl.devinet_vars, |
| 1416 | }, |
| 1417 | }, |
| 1418 | .devinet_conf_dir = { |
| 1419 | { |
| 1420 | .ctl_name = NET_IPV4_CONF, |
| 1421 | .procname = "conf", |
| 1422 | .mode = 0555, |
| 1423 | .child = devinet_sysctl.devinet_dev, |
| 1424 | }, |
| 1425 | }, |
| 1426 | .devinet_proto_dir = { |
| 1427 | { |
| 1428 | .ctl_name = NET_IPV4, |
| 1429 | .procname = "ipv4", |
| 1430 | .mode = 0555, |
| 1431 | .child = devinet_sysctl.devinet_conf_dir, |
| 1432 | }, |
| 1433 | }, |
| 1434 | .devinet_root_dir = { |
| 1435 | { |
| 1436 | .ctl_name = CTL_NET, |
| 1437 | .procname = "net", |
| 1438 | .mode = 0555, |
| 1439 | .child = devinet_sysctl.devinet_proto_dir, |
| 1440 | }, |
| 1441 | }, |
| 1442 | }; |
| 1443 | |
| 1444 | static void devinet_sysctl_register(struct in_device *in_dev, |
| 1445 | struct ipv4_devconf *p) |
| 1446 | { |
| 1447 | int i; |
| 1448 | struct net_device *dev = in_dev ? in_dev->dev : NULL; |
| 1449 | struct devinet_sysctl_table *t = kmalloc(sizeof(*t), GFP_KERNEL); |
| 1450 | char *dev_name = NULL; |
| 1451 | |
| 1452 | if (!t) |
| 1453 | return; |
| 1454 | memcpy(t, &devinet_sysctl, sizeof(*t)); |
| 1455 | for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) { |
| 1456 | t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf; |
| 1457 | t->devinet_vars[i].de = NULL; |
| 1458 | } |
| 1459 | |
| 1460 | if (dev) { |
| 1461 | dev_name = dev->name; |
| 1462 | t->devinet_dev[0].ctl_name = dev->ifindex; |
| 1463 | } else { |
| 1464 | dev_name = "default"; |
| 1465 | t->devinet_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; |
| 1466 | } |
| 1467 | |
| 1468 | /* |
| 1469 | * Make a copy of dev_name, because '.procname' is regarded as const |
| 1470 | * by sysctl and we wouldn't want anyone to change it under our feet |
| 1471 | * (see SIOCSIFNAME). |
| 1472 | */ |
Paulo Marques | 543537b | 2005-06-23 00:09:02 -0700 | [diff] [blame] | 1473 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | if (!dev_name) |
| 1475 | goto free; |
| 1476 | |
| 1477 | t->devinet_dev[0].procname = dev_name; |
| 1478 | t->devinet_dev[0].child = t->devinet_vars; |
| 1479 | t->devinet_dev[0].de = NULL; |
| 1480 | t->devinet_conf_dir[0].child = t->devinet_dev; |
| 1481 | t->devinet_conf_dir[0].de = NULL; |
| 1482 | t->devinet_proto_dir[0].child = t->devinet_conf_dir; |
| 1483 | t->devinet_proto_dir[0].de = NULL; |
| 1484 | t->devinet_root_dir[0].child = t->devinet_proto_dir; |
| 1485 | t->devinet_root_dir[0].de = NULL; |
| 1486 | |
| 1487 | t->sysctl_header = register_sysctl_table(t->devinet_root_dir, 0); |
| 1488 | if (!t->sysctl_header) |
| 1489 | goto free_procname; |
| 1490 | |
| 1491 | p->sysctl = t; |
| 1492 | return; |
| 1493 | |
| 1494 | /* error path */ |
| 1495 | free_procname: |
| 1496 | kfree(dev_name); |
| 1497 | free: |
| 1498 | kfree(t); |
| 1499 | return; |
| 1500 | } |
| 1501 | |
| 1502 | static void devinet_sysctl_unregister(struct ipv4_devconf *p) |
| 1503 | { |
| 1504 | if (p->sysctl) { |
| 1505 | struct devinet_sysctl_table *t = p->sysctl; |
| 1506 | p->sysctl = NULL; |
| 1507 | unregister_sysctl_table(t->sysctl_header); |
| 1508 | kfree(t->devinet_dev[0].procname); |
| 1509 | kfree(t); |
| 1510 | } |
| 1511 | } |
| 1512 | #endif |
| 1513 | |
| 1514 | void __init devinet_init(void) |
| 1515 | { |
| 1516 | register_gifconf(PF_INET, inet_gifconf); |
| 1517 | register_netdevice_notifier(&ip_netdev_notifier); |
| 1518 | rtnetlink_links[PF_INET] = inet_rtnetlink_table; |
| 1519 | #ifdef CONFIG_SYSCTL |
| 1520 | devinet_sysctl.sysctl_header = |
| 1521 | register_sysctl_table(devinet_sysctl.devinet_root_dir, 0); |
| 1522 | devinet_sysctl_register(NULL, &ipv4_devconf_dflt); |
| 1523 | #endif |
| 1524 | } |
| 1525 | |
| 1526 | EXPORT_SYMBOL(devinet_ioctl); |
| 1527 | EXPORT_SYMBOL(in_dev_finish_destroy); |
| 1528 | EXPORT_SYMBOL(inet_select_addr); |
| 1529 | EXPORT_SYMBOL(inetdev_by_index); |
| 1530 | EXPORT_SYMBOL(register_inetaddr_notifier); |
| 1531 | EXPORT_SYMBOL(unregister_inetaddr_notifier); |