Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IPv6 Address [auto]configuration |
| 3 | * Linux INET6 implementation |
| 4 | * |
| 5 | * Authors: |
| 6 | * Pedro Roque <roque@di.fc.ul.pt> |
| 7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
| 8 | * |
| 9 | * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $ |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License |
| 13 | * as published by the Free Software Foundation; either version |
| 14 | * 2 of the License, or (at your option) any later version. |
| 15 | */ |
| 16 | |
| 17 | /* |
| 18 | * Changes: |
| 19 | * |
| 20 | * Janos Farkas : delete timer on ifdown |
| 21 | * <chexum@bankinf.banki.hu> |
| 22 | * Andi Kleen : kill double kfree on module |
| 23 | * unload. |
| 24 | * Maciej W. Rozycki : FDDI support |
| 25 | * sekiya@USAGI : Don't send too many RS |
| 26 | * packets. |
| 27 | * yoshfuji@USAGI : Fixed interval between DAD |
| 28 | * packets. |
| 29 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of |
| 30 | * address validation timer. |
| 31 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) |
| 32 | * support. |
| 33 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 |
| 34 | * address on a same interface. |
| 35 | * YOSHIFUJI Hideaki @USAGI : ARCnet support |
| 36 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to |
| 37 | * seq_file. |
| 38 | */ |
| 39 | |
| 40 | #include <linux/config.h> |
| 41 | #include <linux/errno.h> |
| 42 | #include <linux/types.h> |
| 43 | #include <linux/socket.h> |
| 44 | #include <linux/sockios.h> |
| 45 | #include <linux/sched.h> |
| 46 | #include <linux/net.h> |
| 47 | #include <linux/in6.h> |
| 48 | #include <linux/netdevice.h> |
| 49 | #include <linux/if_arp.h> |
| 50 | #include <linux/if_arcnet.h> |
| 51 | #include <linux/if_infiniband.h> |
| 52 | #include <linux/route.h> |
| 53 | #include <linux/inetdevice.h> |
| 54 | #include <linux/init.h> |
| 55 | #ifdef CONFIG_SYSCTL |
| 56 | #include <linux/sysctl.h> |
| 57 | #endif |
| 58 | #include <linux/delay.h> |
| 59 | #include <linux/notifier.h> |
Paulo Marques | 543537b | 2005-06-23 00:09:02 -0700 | [diff] [blame] | 60 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
| 62 | #include <net/sock.h> |
| 63 | #include <net/snmp.h> |
| 64 | |
| 65 | #include <net/ipv6.h> |
| 66 | #include <net/protocol.h> |
| 67 | #include <net/ndisc.h> |
| 68 | #include <net/ip6_route.h> |
| 69 | #include <net/addrconf.h> |
| 70 | #include <net/tcp.h> |
| 71 | #include <net/ip.h> |
| 72 | #include <linux/if_tunnel.h> |
| 73 | #include <linux/rtnetlink.h> |
| 74 | |
| 75 | #ifdef CONFIG_IPV6_PRIVACY |
| 76 | #include <linux/random.h> |
| 77 | #include <linux/crypto.h> |
| 78 | #include <asm/scatterlist.h> |
| 79 | #endif |
| 80 | |
| 81 | #include <asm/uaccess.h> |
| 82 | |
| 83 | #include <linux/proc_fs.h> |
| 84 | #include <linux/seq_file.h> |
| 85 | |
| 86 | /* Set to 3 to get tracing... */ |
| 87 | #define ACONF_DEBUG 2 |
| 88 | |
| 89 | #if ACONF_DEBUG >= 3 |
| 90 | #define ADBG(x) printk x |
| 91 | #else |
| 92 | #define ADBG(x) |
| 93 | #endif |
| 94 | |
| 95 | #define INFINITY_LIFE_TIME 0xFFFFFFFF |
| 96 | #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b))) |
| 97 | |
| 98 | #ifdef CONFIG_SYSCTL |
| 99 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p); |
| 100 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p); |
| 101 | #endif |
| 102 | |
| 103 | #ifdef CONFIG_IPV6_PRIVACY |
| 104 | static int __ipv6_regen_rndid(struct inet6_dev *idev); |
| 105 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); |
| 106 | static void ipv6_regen_rndid(unsigned long data); |
| 107 | |
| 108 | static int desync_factor = MAX_DESYNC_FACTOR * HZ; |
| 109 | static struct crypto_tfm *md5_tfm; |
| 110 | static DEFINE_SPINLOCK(md5_tfm_lock); |
| 111 | #endif |
| 112 | |
| 113 | static int ipv6_count_addresses(struct inet6_dev *idev); |
| 114 | |
| 115 | /* |
| 116 | * Configured unicast address hash table |
| 117 | */ |
| 118 | static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE]; |
| 119 | static DEFINE_RWLOCK(addrconf_hash_lock); |
| 120 | |
| 121 | /* Protects inet6 devices */ |
| 122 | DEFINE_RWLOCK(addrconf_lock); |
| 123 | |
| 124 | static void addrconf_verify(unsigned long); |
| 125 | |
| 126 | static struct timer_list addr_chk_timer = |
| 127 | TIMER_INITIALIZER(addrconf_verify, 0, 0); |
| 128 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
| 129 | |
| 130 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); |
| 131 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); |
| 132 | |
| 133 | static int addrconf_ifdown(struct net_device *dev, int how); |
| 134 | |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 135 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | static void addrconf_dad_timer(unsigned long data); |
| 137 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
| 138 | static void addrconf_rs_timer(unsigned long data); |
| 139 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
| 140 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
| 141 | |
| 142 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
| 143 | struct prefix_info *pinfo); |
| 144 | static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev); |
| 145 | |
| 146 | static struct notifier_block *inet6addr_chain; |
| 147 | |
| 148 | struct ipv6_devconf ipv6_devconf = { |
| 149 | .forwarding = 0, |
| 150 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, |
| 151 | .mtu6 = IPV6_MIN_MTU, |
| 152 | .accept_ra = 1, |
| 153 | .accept_redirects = 1, |
| 154 | .autoconf = 1, |
| 155 | .force_mld_version = 0, |
| 156 | .dad_transmits = 1, |
| 157 | .rtr_solicits = MAX_RTR_SOLICITATIONS, |
| 158 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, |
| 159 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
| 160 | #ifdef CONFIG_IPV6_PRIVACY |
| 161 | .use_tempaddr = 0, |
| 162 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
| 163 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, |
| 164 | .regen_max_retry = REGEN_MAX_RETRY, |
| 165 | .max_desync_factor = MAX_DESYNC_FACTOR, |
| 166 | #endif |
| 167 | .max_addresses = IPV6_MAX_ADDRESSES, |
| 168 | }; |
| 169 | |
| 170 | static struct ipv6_devconf ipv6_devconf_dflt = { |
| 171 | .forwarding = 0, |
| 172 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, |
| 173 | .mtu6 = IPV6_MIN_MTU, |
| 174 | .accept_ra = 1, |
| 175 | .accept_redirects = 1, |
| 176 | .autoconf = 1, |
| 177 | .dad_transmits = 1, |
| 178 | .rtr_solicits = MAX_RTR_SOLICITATIONS, |
| 179 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, |
| 180 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
| 181 | #ifdef CONFIG_IPV6_PRIVACY |
| 182 | .use_tempaddr = 0, |
| 183 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
| 184 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, |
| 185 | .regen_max_retry = REGEN_MAX_RETRY, |
| 186 | .max_desync_factor = MAX_DESYNC_FACTOR, |
| 187 | #endif |
| 188 | .max_addresses = IPV6_MAX_ADDRESSES, |
| 189 | }; |
| 190 | |
| 191 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ |
| 192 | #if 0 |
| 193 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
| 194 | #endif |
| 195 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
| 196 | |
| 197 | int ipv6_addr_type(const struct in6_addr *addr) |
| 198 | { |
| 199 | int type; |
| 200 | u32 st; |
| 201 | |
| 202 | st = addr->s6_addr32[0]; |
| 203 | |
| 204 | if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) { |
| 205 | type = IPV6_ADDR_MULTICAST; |
| 206 | |
| 207 | switch((st & htonl(0x00FF0000))) { |
| 208 | case __constant_htonl(0x00010000): |
| 209 | type |= IPV6_ADDR_LOOPBACK; |
| 210 | break; |
| 211 | |
| 212 | case __constant_htonl(0x00020000): |
| 213 | type |= IPV6_ADDR_LINKLOCAL; |
| 214 | break; |
| 215 | |
| 216 | case __constant_htonl(0x00050000): |
| 217 | type |= IPV6_ADDR_SITELOCAL; |
| 218 | break; |
| 219 | }; |
| 220 | return type; |
| 221 | } |
| 222 | |
| 223 | type = IPV6_ADDR_UNICAST; |
| 224 | |
| 225 | /* Consider all addresses with the first three bits different of |
| 226 | 000 and 111 as finished. |
| 227 | */ |
| 228 | if ((st & htonl(0xE0000000)) != htonl(0x00000000) && |
| 229 | (st & htonl(0xE0000000)) != htonl(0xE0000000)) |
| 230 | return type; |
| 231 | |
| 232 | if ((st & htonl(0xFFC00000)) == htonl(0xFE800000)) |
| 233 | return (IPV6_ADDR_LINKLOCAL | type); |
| 234 | |
| 235 | if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000)) |
| 236 | return (IPV6_ADDR_SITELOCAL | type); |
| 237 | |
| 238 | if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) { |
| 239 | if (addr->s6_addr32[2] == 0) { |
| 240 | if (addr->s6_addr32[3] == 0) |
| 241 | return IPV6_ADDR_ANY; |
| 242 | |
| 243 | if (addr->s6_addr32[3] == htonl(0x00000001)) |
| 244 | return (IPV6_ADDR_LOOPBACK | type); |
| 245 | |
| 246 | return (IPV6_ADDR_COMPATv4 | type); |
| 247 | } |
| 248 | |
| 249 | if (addr->s6_addr32[2] == htonl(0x0000ffff)) |
| 250 | return IPV6_ADDR_MAPPED; |
| 251 | } |
| 252 | |
| 253 | st &= htonl(0xFF000000); |
| 254 | if (st == 0) |
| 255 | return IPV6_ADDR_RESERVED; |
| 256 | st &= htonl(0xFE000000); |
| 257 | if (st == htonl(0x02000000)) |
| 258 | return IPV6_ADDR_RESERVED; /* for NSAP */ |
| 259 | if (st == htonl(0x04000000)) |
| 260 | return IPV6_ADDR_RESERVED; /* for IPX */ |
| 261 | return type; |
| 262 | } |
| 263 | |
| 264 | static void addrconf_del_timer(struct inet6_ifaddr *ifp) |
| 265 | { |
| 266 | if (del_timer(&ifp->timer)) |
| 267 | __in6_ifa_put(ifp); |
| 268 | } |
| 269 | |
| 270 | enum addrconf_timer_t |
| 271 | { |
| 272 | AC_NONE, |
| 273 | AC_DAD, |
| 274 | AC_RS, |
| 275 | }; |
| 276 | |
| 277 | static void addrconf_mod_timer(struct inet6_ifaddr *ifp, |
| 278 | enum addrconf_timer_t what, |
| 279 | unsigned long when) |
| 280 | { |
| 281 | if (!del_timer(&ifp->timer)) |
| 282 | in6_ifa_hold(ifp); |
| 283 | |
| 284 | switch (what) { |
| 285 | case AC_DAD: |
| 286 | ifp->timer.function = addrconf_dad_timer; |
| 287 | break; |
| 288 | case AC_RS: |
| 289 | ifp->timer.function = addrconf_rs_timer; |
| 290 | break; |
| 291 | default:; |
| 292 | } |
| 293 | ifp->timer.expires = jiffies + when; |
| 294 | add_timer(&ifp->timer); |
| 295 | } |
| 296 | |
| 297 | /* Nobody refers to this device, we may destroy it. */ |
| 298 | |
| 299 | void in6_dev_finish_destroy(struct inet6_dev *idev) |
| 300 | { |
| 301 | struct net_device *dev = idev->dev; |
| 302 | BUG_TRAP(idev->addr_list==NULL); |
| 303 | BUG_TRAP(idev->mc_list==NULL); |
| 304 | #ifdef NET_REFCNT_DEBUG |
| 305 | printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL"); |
| 306 | #endif |
| 307 | dev_put(dev); |
| 308 | if (!idev->dead) { |
| 309 | printk("Freeing alive inet6 device %p\n", idev); |
| 310 | return; |
| 311 | } |
| 312 | snmp6_free_dev(idev); |
| 313 | kfree(idev); |
| 314 | } |
| 315 | |
| 316 | static struct inet6_dev * ipv6_add_dev(struct net_device *dev) |
| 317 | { |
| 318 | struct inet6_dev *ndev; |
| 319 | |
| 320 | ASSERT_RTNL(); |
| 321 | |
| 322 | if (dev->mtu < IPV6_MIN_MTU) |
| 323 | return NULL; |
| 324 | |
| 325 | ndev = kmalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
| 326 | |
| 327 | if (ndev) { |
| 328 | memset(ndev, 0, sizeof(struct inet6_dev)); |
| 329 | |
| 330 | rwlock_init(&ndev->lock); |
| 331 | ndev->dev = dev; |
| 332 | memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); |
| 333 | ndev->cnf.mtu6 = dev->mtu; |
| 334 | ndev->cnf.sysctl = NULL; |
| 335 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); |
| 336 | if (ndev->nd_parms == NULL) { |
| 337 | kfree(ndev); |
| 338 | return NULL; |
| 339 | } |
| 340 | /* We refer to the device */ |
| 341 | dev_hold(dev); |
| 342 | |
| 343 | if (snmp6_alloc_dev(ndev) < 0) { |
| 344 | ADBG((KERN_WARNING |
| 345 | "%s(): cannot allocate memory for statistics; dev=%s.\n", |
| 346 | __FUNCTION__, dev->name)); |
| 347 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
| 348 | ndev->dead = 1; |
| 349 | in6_dev_finish_destroy(ndev); |
| 350 | return NULL; |
| 351 | } |
| 352 | |
| 353 | if (snmp6_register_dev(ndev) < 0) { |
| 354 | ADBG((KERN_WARNING |
| 355 | "%s(): cannot create /proc/net/dev_snmp6/%s\n", |
| 356 | __FUNCTION__, dev->name)); |
| 357 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
| 358 | ndev->dead = 1; |
| 359 | in6_dev_finish_destroy(ndev); |
| 360 | return NULL; |
| 361 | } |
| 362 | |
| 363 | /* One reference from device. We must do this before |
| 364 | * we invoke __ipv6_regen_rndid(). |
| 365 | */ |
| 366 | in6_dev_hold(ndev); |
| 367 | |
| 368 | #ifdef CONFIG_IPV6_PRIVACY |
| 369 | get_random_bytes(ndev->rndid, sizeof(ndev->rndid)); |
| 370 | get_random_bytes(ndev->entropy, sizeof(ndev->entropy)); |
| 371 | init_timer(&ndev->regen_timer); |
| 372 | ndev->regen_timer.function = ipv6_regen_rndid; |
| 373 | ndev->regen_timer.data = (unsigned long) ndev; |
| 374 | if ((dev->flags&IFF_LOOPBACK) || |
| 375 | dev->type == ARPHRD_TUNNEL || |
Rémi Denis-Courmont | 77bd919 | 2005-06-13 15:01:34 -0700 | [diff] [blame] | 376 | dev->type == ARPHRD_NONE || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | dev->type == ARPHRD_SIT) { |
| 378 | printk(KERN_INFO |
| 379 | "Disabled Privacy Extensions on device %p(%s)\n", |
| 380 | dev, dev->name); |
| 381 | ndev->cnf.use_tempaddr = -1; |
| 382 | } else { |
| 383 | in6_dev_hold(ndev); |
| 384 | ipv6_regen_rndid((unsigned long) ndev); |
| 385 | } |
| 386 | #endif |
| 387 | |
| 388 | write_lock_bh(&addrconf_lock); |
| 389 | dev->ip6_ptr = ndev; |
| 390 | write_unlock_bh(&addrconf_lock); |
| 391 | |
| 392 | ipv6_mc_init_dev(ndev); |
| 393 | ndev->tstamp = jiffies; |
| 394 | #ifdef CONFIG_SYSCTL |
| 395 | neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, |
| 396 | NET_IPV6_NEIGH, "ipv6", |
| 397 | &ndisc_ifinfo_sysctl_change, |
| 398 | NULL); |
| 399 | addrconf_sysctl_register(ndev, &ndev->cnf); |
| 400 | #endif |
| 401 | } |
| 402 | return ndev; |
| 403 | } |
| 404 | |
| 405 | static struct inet6_dev * ipv6_find_idev(struct net_device *dev) |
| 406 | { |
| 407 | struct inet6_dev *idev; |
| 408 | |
| 409 | ASSERT_RTNL(); |
| 410 | |
| 411 | if ((idev = __in6_dev_get(dev)) == NULL) { |
| 412 | if ((idev = ipv6_add_dev(dev)) == NULL) |
| 413 | return NULL; |
| 414 | } |
| 415 | if (dev->flags&IFF_UP) |
| 416 | ipv6_mc_up(idev); |
| 417 | return idev; |
| 418 | } |
| 419 | |
| 420 | #ifdef CONFIG_SYSCTL |
| 421 | static void dev_forward_change(struct inet6_dev *idev) |
| 422 | { |
| 423 | struct net_device *dev; |
| 424 | struct inet6_ifaddr *ifa; |
| 425 | struct in6_addr addr; |
| 426 | |
| 427 | if (!idev) |
| 428 | return; |
| 429 | dev = idev->dev; |
| 430 | if (dev && (dev->flags & IFF_MULTICAST)) { |
| 431 | ipv6_addr_all_routers(&addr); |
| 432 | |
| 433 | if (idev->cnf.forwarding) |
| 434 | ipv6_dev_mc_inc(dev, &addr); |
| 435 | else |
| 436 | ipv6_dev_mc_dec(dev, &addr); |
| 437 | } |
| 438 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { |
| 439 | if (idev->cnf.forwarding) |
| 440 | addrconf_join_anycast(ifa); |
| 441 | else |
| 442 | addrconf_leave_anycast(ifa); |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | |
| 447 | static void addrconf_forward_change(void) |
| 448 | { |
| 449 | struct net_device *dev; |
| 450 | struct inet6_dev *idev; |
| 451 | |
| 452 | read_lock(&dev_base_lock); |
| 453 | for (dev=dev_base; dev; dev=dev->next) { |
| 454 | read_lock(&addrconf_lock); |
| 455 | idev = __in6_dev_get(dev); |
| 456 | if (idev) { |
| 457 | int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding); |
| 458 | idev->cnf.forwarding = ipv6_devconf.forwarding; |
| 459 | if (changed) |
| 460 | dev_forward_change(idev); |
| 461 | } |
| 462 | read_unlock(&addrconf_lock); |
| 463 | } |
| 464 | read_unlock(&dev_base_lock); |
| 465 | } |
| 466 | #endif |
| 467 | |
| 468 | /* Nobody refers to this ifaddr, destroy it */ |
| 469 | |
| 470 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
| 471 | { |
| 472 | BUG_TRAP(ifp->if_next==NULL); |
| 473 | BUG_TRAP(ifp->lst_next==NULL); |
| 474 | #ifdef NET_REFCNT_DEBUG |
| 475 | printk(KERN_DEBUG "inet6_ifa_finish_destroy\n"); |
| 476 | #endif |
| 477 | |
| 478 | in6_dev_put(ifp->idev); |
| 479 | |
| 480 | if (del_timer(&ifp->timer)) |
| 481 | printk("Timer is still running, when freeing ifa=%p\n", ifp); |
| 482 | |
| 483 | if (!ifp->dead) { |
| 484 | printk("Freeing alive inet6 address %p\n", ifp); |
| 485 | return; |
| 486 | } |
| 487 | dst_release(&ifp->rt->u.dst); |
| 488 | |
| 489 | kfree(ifp); |
| 490 | } |
| 491 | |
| 492 | /* On success it returns ifp with increased reference count */ |
| 493 | |
| 494 | static struct inet6_ifaddr * |
| 495 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 496 | int scope, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | { |
| 498 | struct inet6_ifaddr *ifa = NULL; |
| 499 | struct rt6_info *rt; |
| 500 | int hash; |
| 501 | int err = 0; |
| 502 | |
| 503 | read_lock_bh(&addrconf_lock); |
| 504 | if (idev->dead) { |
| 505 | err = -ENODEV; /*XXX*/ |
| 506 | goto out2; |
| 507 | } |
| 508 | |
| 509 | write_lock(&addrconf_hash_lock); |
| 510 | |
| 511 | /* Ignore adding duplicate addresses on an interface */ |
| 512 | if (ipv6_chk_same_addr(addr, idev->dev)) { |
| 513 | ADBG(("ipv6_add_addr: already assigned\n")); |
| 514 | err = -EEXIST; |
| 515 | goto out; |
| 516 | } |
| 517 | |
| 518 | ifa = kmalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
| 519 | |
| 520 | if (ifa == NULL) { |
| 521 | ADBG(("ipv6_add_addr: malloc failed\n")); |
| 522 | err = -ENOBUFS; |
| 523 | goto out; |
| 524 | } |
| 525 | |
| 526 | rt = addrconf_dst_alloc(idev, addr, 0); |
| 527 | if (IS_ERR(rt)) { |
| 528 | err = PTR_ERR(rt); |
| 529 | goto out; |
| 530 | } |
| 531 | |
| 532 | memset(ifa, 0, sizeof(struct inet6_ifaddr)); |
| 533 | ipv6_addr_copy(&ifa->addr, addr); |
| 534 | |
| 535 | spin_lock_init(&ifa->lock); |
| 536 | init_timer(&ifa->timer); |
| 537 | ifa->timer.data = (unsigned long) ifa; |
| 538 | ifa->scope = scope; |
| 539 | ifa->prefix_len = pfxlen; |
| 540 | ifa->flags = flags | IFA_F_TENTATIVE; |
| 541 | ifa->cstamp = ifa->tstamp = jiffies; |
| 542 | |
| 543 | ifa->idev = idev; |
| 544 | in6_dev_hold(idev); |
| 545 | /* For caller */ |
| 546 | in6_ifa_hold(ifa); |
| 547 | |
| 548 | /* Add to big hash table */ |
| 549 | hash = ipv6_addr_hash(addr); |
| 550 | |
| 551 | ifa->lst_next = inet6_addr_lst[hash]; |
| 552 | inet6_addr_lst[hash] = ifa; |
| 553 | in6_ifa_hold(ifa); |
| 554 | write_unlock(&addrconf_hash_lock); |
| 555 | |
| 556 | write_lock(&idev->lock); |
| 557 | /* Add to inet6_dev unicast addr list. */ |
| 558 | ifa->if_next = idev->addr_list; |
| 559 | idev->addr_list = ifa; |
| 560 | |
| 561 | #ifdef CONFIG_IPV6_PRIVACY |
| 562 | if (ifa->flags&IFA_F_TEMPORARY) { |
| 563 | ifa->tmp_next = idev->tempaddr_list; |
| 564 | idev->tempaddr_list = ifa; |
| 565 | in6_ifa_hold(ifa); |
| 566 | } |
| 567 | #endif |
| 568 | |
| 569 | ifa->rt = rt; |
| 570 | |
| 571 | in6_ifa_hold(ifa); |
| 572 | write_unlock(&idev->lock); |
| 573 | out2: |
| 574 | read_unlock_bh(&addrconf_lock); |
| 575 | |
YOSHIFUJI Hideaki | fd92833 | 2005-04-19 22:27:09 -0700 | [diff] [blame] | 576 | if (likely(err == 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); |
| 578 | else { |
| 579 | kfree(ifa); |
| 580 | ifa = ERR_PTR(err); |
| 581 | } |
| 582 | |
| 583 | return ifa; |
| 584 | out: |
| 585 | write_unlock(&addrconf_hash_lock); |
| 586 | goto out2; |
| 587 | } |
| 588 | |
| 589 | /* This function wants to get referenced ifp and releases it before return */ |
| 590 | |
| 591 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) |
| 592 | { |
| 593 | struct inet6_ifaddr *ifa, **ifap; |
| 594 | struct inet6_dev *idev = ifp->idev; |
| 595 | int hash; |
| 596 | int deleted = 0, onlink = 0; |
| 597 | unsigned long expires = jiffies; |
| 598 | |
| 599 | hash = ipv6_addr_hash(&ifp->addr); |
| 600 | |
| 601 | ifp->dead = 1; |
| 602 | |
| 603 | write_lock_bh(&addrconf_hash_lock); |
| 604 | for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL; |
| 605 | ifap = &ifa->lst_next) { |
| 606 | if (ifa == ifp) { |
| 607 | *ifap = ifa->lst_next; |
| 608 | __in6_ifa_put(ifp); |
| 609 | ifa->lst_next = NULL; |
| 610 | break; |
| 611 | } |
| 612 | } |
| 613 | write_unlock_bh(&addrconf_hash_lock); |
| 614 | |
| 615 | write_lock_bh(&idev->lock); |
| 616 | #ifdef CONFIG_IPV6_PRIVACY |
| 617 | if (ifp->flags&IFA_F_TEMPORARY) { |
| 618 | for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL; |
| 619 | ifap = &ifa->tmp_next) { |
| 620 | if (ifa == ifp) { |
| 621 | *ifap = ifa->tmp_next; |
| 622 | if (ifp->ifpub) { |
| 623 | in6_ifa_put(ifp->ifpub); |
| 624 | ifp->ifpub = NULL; |
| 625 | } |
| 626 | __in6_ifa_put(ifp); |
| 627 | ifa->tmp_next = NULL; |
| 628 | break; |
| 629 | } |
| 630 | } |
| 631 | } |
| 632 | #endif |
| 633 | |
| 634 | for (ifap = &idev->addr_list; (ifa=*ifap) != NULL; |
| 635 | ifap = &ifa->if_next) { |
| 636 | if (ifa == ifp) { |
| 637 | *ifap = ifa->if_next; |
| 638 | __in6_ifa_put(ifp); |
| 639 | ifa->if_next = NULL; |
| 640 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
| 641 | break; |
| 642 | deleted = 1; |
| 643 | } else if (ifp->flags & IFA_F_PERMANENT) { |
| 644 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, |
| 645 | ifp->prefix_len)) { |
| 646 | if (ifa->flags & IFA_F_PERMANENT) { |
| 647 | onlink = 1; |
| 648 | if (deleted) |
| 649 | break; |
| 650 | } else { |
| 651 | unsigned long lifetime; |
| 652 | |
| 653 | if (!onlink) |
| 654 | onlink = -1; |
| 655 | |
| 656 | spin_lock(&ifa->lock); |
| 657 | lifetime = min_t(unsigned long, |
| 658 | ifa->valid_lft, 0x7fffffffUL/HZ); |
| 659 | if (time_before(expires, |
| 660 | ifa->tstamp + lifetime * HZ)) |
| 661 | expires = ifa->tstamp + lifetime * HZ; |
| 662 | spin_unlock(&ifa->lock); |
| 663 | } |
| 664 | } |
| 665 | } |
| 666 | } |
| 667 | write_unlock_bh(&idev->lock); |
| 668 | |
| 669 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
| 670 | |
| 671 | notifier_call_chain(&inet6addr_chain,NETDEV_DOWN,ifp); |
| 672 | |
| 673 | addrconf_del_timer(ifp); |
| 674 | |
| 675 | /* |
| 676 | * Purge or update corresponding prefix |
| 677 | * |
| 678 | * 1) we don't purge prefix here if address was not permanent. |
| 679 | * prefix is managed by its own lifetime. |
| 680 | * 2) if there're no addresses, delete prefix. |
| 681 | * 3) if there're still other permanent address(es), |
| 682 | * corresponding prefix is still permanent. |
| 683 | * 4) otherwise, update prefix lifetime to the |
| 684 | * longest valid lifetime among the corresponding |
| 685 | * addresses on the device. |
| 686 | * Note: subsequent RA will update lifetime. |
| 687 | * |
| 688 | * --yoshfuji |
| 689 | */ |
| 690 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { |
| 691 | struct in6_addr prefix; |
| 692 | struct rt6_info *rt; |
| 693 | |
| 694 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
| 695 | rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1); |
| 696 | |
| 697 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { |
| 698 | if (onlink == 0) { |
Jamal Hadi Salim | 0d51aa8 | 2005-06-21 13:51:04 -0700 | [diff] [blame] | 699 | ip6_del_rt(rt, NULL, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | rt = NULL; |
| 701 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { |
| 702 | rt->rt6i_expires = expires; |
| 703 | rt->rt6i_flags |= RTF_EXPIRES; |
| 704 | } |
| 705 | } |
| 706 | dst_release(&rt->u.dst); |
| 707 | } |
| 708 | |
| 709 | in6_ifa_put(ifp); |
| 710 | } |
| 711 | |
| 712 | #ifdef CONFIG_IPV6_PRIVACY |
| 713 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
| 714 | { |
| 715 | struct inet6_dev *idev = ifp->idev; |
| 716 | struct in6_addr addr, *tmpaddr; |
| 717 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp; |
| 718 | int tmp_plen; |
| 719 | int ret = 0; |
| 720 | int max_addresses; |
| 721 | |
| 722 | write_lock(&idev->lock); |
| 723 | if (ift) { |
| 724 | spin_lock_bh(&ift->lock); |
| 725 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); |
| 726 | spin_unlock_bh(&ift->lock); |
| 727 | tmpaddr = &addr; |
| 728 | } else { |
| 729 | tmpaddr = NULL; |
| 730 | } |
| 731 | retry: |
| 732 | in6_dev_hold(idev); |
| 733 | if (idev->cnf.use_tempaddr <= 0) { |
| 734 | write_unlock(&idev->lock); |
| 735 | printk(KERN_INFO |
| 736 | "ipv6_create_tempaddr(): use_tempaddr is disabled.\n"); |
| 737 | in6_dev_put(idev); |
| 738 | ret = -1; |
| 739 | goto out; |
| 740 | } |
| 741 | spin_lock_bh(&ifp->lock); |
| 742 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { |
| 743 | idev->cnf.use_tempaddr = -1; /*XXX*/ |
| 744 | spin_unlock_bh(&ifp->lock); |
| 745 | write_unlock(&idev->lock); |
| 746 | printk(KERN_WARNING |
| 747 | "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n"); |
| 748 | in6_dev_put(idev); |
| 749 | ret = -1; |
| 750 | goto out; |
| 751 | } |
| 752 | in6_ifa_hold(ifp); |
| 753 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); |
| 754 | if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) { |
| 755 | spin_unlock_bh(&ifp->lock); |
| 756 | write_unlock(&idev->lock); |
| 757 | printk(KERN_WARNING |
| 758 | "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n"); |
| 759 | in6_ifa_put(ifp); |
| 760 | in6_dev_put(idev); |
| 761 | ret = -1; |
| 762 | goto out; |
| 763 | } |
| 764 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
| 765 | tmp_valid_lft = min_t(__u32, |
| 766 | ifp->valid_lft, |
| 767 | idev->cnf.temp_valid_lft); |
| 768 | tmp_prefered_lft = min_t(__u32, |
| 769 | ifp->prefered_lft, |
| 770 | idev->cnf.temp_prefered_lft - desync_factor / HZ); |
| 771 | tmp_plen = ifp->prefix_len; |
| 772 | max_addresses = idev->cnf.max_addresses; |
| 773 | tmp_cstamp = ifp->cstamp; |
| 774 | tmp_tstamp = ifp->tstamp; |
| 775 | spin_unlock_bh(&ifp->lock); |
| 776 | |
| 777 | write_unlock(&idev->lock); |
| 778 | ift = !max_addresses || |
| 779 | ipv6_count_addresses(idev) < max_addresses ? |
| 780 | ipv6_add_addr(idev, &addr, tmp_plen, |
| 781 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL; |
| 782 | if (!ift || IS_ERR(ift)) { |
| 783 | in6_ifa_put(ifp); |
| 784 | in6_dev_put(idev); |
| 785 | printk(KERN_INFO |
| 786 | "ipv6_create_tempaddr(): retry temporary address regeneration.\n"); |
| 787 | tmpaddr = &addr; |
| 788 | write_lock(&idev->lock); |
| 789 | goto retry; |
| 790 | } |
| 791 | |
| 792 | spin_lock_bh(&ift->lock); |
| 793 | ift->ifpub = ifp; |
| 794 | ift->valid_lft = tmp_valid_lft; |
| 795 | ift->prefered_lft = tmp_prefered_lft; |
| 796 | ift->cstamp = tmp_cstamp; |
| 797 | ift->tstamp = tmp_tstamp; |
| 798 | spin_unlock_bh(&ift->lock); |
| 799 | |
| 800 | addrconf_dad_start(ift, 0); |
| 801 | in6_ifa_put(ift); |
| 802 | in6_dev_put(idev); |
| 803 | out: |
| 804 | return ret; |
| 805 | } |
| 806 | #endif |
| 807 | |
| 808 | /* |
| 809 | * Choose an appropriate source address |
| 810 | * should do: |
| 811 | * i) get an address with an appropriate scope |
| 812 | * ii) see if there is a specific route for the destination and use |
| 813 | * an address of the attached interface |
| 814 | * iii) don't use deprecated addresses |
| 815 | */ |
| 816 | static int inline ipv6_saddr_pref(const struct inet6_ifaddr *ifp, u8 invpref) |
| 817 | { |
| 818 | int pref; |
| 819 | pref = ifp->flags&IFA_F_DEPRECATED ? 0 : 2; |
| 820 | #ifdef CONFIG_IPV6_PRIVACY |
| 821 | pref |= (ifp->flags^invpref)&IFA_F_TEMPORARY ? 0 : 1; |
| 822 | #endif |
| 823 | return pref; |
| 824 | } |
| 825 | |
| 826 | #ifdef CONFIG_IPV6_PRIVACY |
| 827 | #define IPV6_GET_SADDR_MAXSCORE(score) ((score) == 3) |
| 828 | #else |
| 829 | #define IPV6_GET_SADDR_MAXSCORE(score) (score) |
| 830 | #endif |
| 831 | |
| 832 | int ipv6_dev_get_saddr(struct net_device *dev, |
| 833 | struct in6_addr *daddr, struct in6_addr *saddr) |
| 834 | { |
| 835 | struct inet6_ifaddr *ifp = NULL; |
| 836 | struct inet6_ifaddr *match = NULL; |
| 837 | struct inet6_dev *idev; |
| 838 | int scope; |
| 839 | int err; |
| 840 | int hiscore = -1, score; |
| 841 | |
| 842 | scope = ipv6_addr_scope(daddr); |
| 843 | |
| 844 | /* |
| 845 | * known dev |
| 846 | * search dev and walk through dev addresses |
| 847 | */ |
| 848 | |
| 849 | if (dev) { |
| 850 | if (dev->flags & IFF_LOOPBACK) |
| 851 | scope = IFA_HOST; |
| 852 | |
| 853 | read_lock(&addrconf_lock); |
| 854 | idev = __in6_dev_get(dev); |
| 855 | if (idev) { |
| 856 | read_lock_bh(&idev->lock); |
| 857 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { |
| 858 | if (ifp->scope == scope) { |
| 859 | if (ifp->flags&IFA_F_TENTATIVE) |
| 860 | continue; |
| 861 | #ifdef CONFIG_IPV6_PRIVACY |
| 862 | score = ipv6_saddr_pref(ifp, idev->cnf.use_tempaddr > 1 ? IFA_F_TEMPORARY : 0); |
| 863 | #else |
| 864 | score = ipv6_saddr_pref(ifp, 0); |
| 865 | #endif |
| 866 | if (score <= hiscore) |
| 867 | continue; |
| 868 | |
| 869 | if (match) |
| 870 | in6_ifa_put(match); |
| 871 | match = ifp; |
| 872 | hiscore = score; |
| 873 | in6_ifa_hold(ifp); |
| 874 | |
| 875 | if (IPV6_GET_SADDR_MAXSCORE(score)) { |
| 876 | read_unlock_bh(&idev->lock); |
| 877 | read_unlock(&addrconf_lock); |
| 878 | goto out; |
| 879 | } |
| 880 | } |
| 881 | } |
| 882 | read_unlock_bh(&idev->lock); |
| 883 | } |
| 884 | read_unlock(&addrconf_lock); |
| 885 | } |
| 886 | |
| 887 | if (scope == IFA_LINK) |
| 888 | goto out; |
| 889 | |
| 890 | /* |
| 891 | * dev == NULL or search failed for specified dev |
| 892 | */ |
| 893 | |
| 894 | read_lock(&dev_base_lock); |
| 895 | read_lock(&addrconf_lock); |
| 896 | for (dev = dev_base; dev; dev=dev->next) { |
| 897 | idev = __in6_dev_get(dev); |
| 898 | if (idev) { |
| 899 | read_lock_bh(&idev->lock); |
| 900 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { |
| 901 | if (ifp->scope == scope) { |
| 902 | if (ifp->flags&IFA_F_TENTATIVE) |
| 903 | continue; |
| 904 | #ifdef CONFIG_IPV6_PRIVACY |
| 905 | score = ipv6_saddr_pref(ifp, idev->cnf.use_tempaddr > 1 ? IFA_F_TEMPORARY : 0); |
| 906 | #else |
| 907 | score = ipv6_saddr_pref(ifp, 0); |
| 908 | #endif |
| 909 | if (score <= hiscore) |
| 910 | continue; |
| 911 | |
| 912 | if (match) |
| 913 | in6_ifa_put(match); |
| 914 | match = ifp; |
| 915 | hiscore = score; |
| 916 | in6_ifa_hold(ifp); |
| 917 | |
| 918 | if (IPV6_GET_SADDR_MAXSCORE(score)) { |
| 919 | read_unlock_bh(&idev->lock); |
| 920 | goto out_unlock_base; |
| 921 | } |
| 922 | } |
| 923 | } |
| 924 | read_unlock_bh(&idev->lock); |
| 925 | } |
| 926 | } |
| 927 | |
| 928 | out_unlock_base: |
| 929 | read_unlock(&addrconf_lock); |
| 930 | read_unlock(&dev_base_lock); |
| 931 | |
| 932 | out: |
| 933 | err = -EADDRNOTAVAIL; |
| 934 | if (match) { |
| 935 | ipv6_addr_copy(saddr, &match->addr); |
| 936 | err = 0; |
| 937 | in6_ifa_put(match); |
| 938 | } |
| 939 | |
| 940 | return err; |
| 941 | } |
| 942 | |
| 943 | |
| 944 | int ipv6_get_saddr(struct dst_entry *dst, |
| 945 | struct in6_addr *daddr, struct in6_addr *saddr) |
| 946 | { |
| 947 | return ipv6_dev_get_saddr(dst ? ((struct rt6_info *)dst)->rt6i_idev->dev : NULL, daddr, saddr); |
| 948 | } |
| 949 | |
| 950 | |
| 951 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr) |
| 952 | { |
| 953 | struct inet6_dev *idev; |
| 954 | int err = -EADDRNOTAVAIL; |
| 955 | |
| 956 | read_lock(&addrconf_lock); |
| 957 | if ((idev = __in6_dev_get(dev)) != NULL) { |
| 958 | struct inet6_ifaddr *ifp; |
| 959 | |
| 960 | read_lock_bh(&idev->lock); |
| 961 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { |
| 962 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
| 963 | ipv6_addr_copy(addr, &ifp->addr); |
| 964 | err = 0; |
| 965 | break; |
| 966 | } |
| 967 | } |
| 968 | read_unlock_bh(&idev->lock); |
| 969 | } |
| 970 | read_unlock(&addrconf_lock); |
| 971 | return err; |
| 972 | } |
| 973 | |
| 974 | static int ipv6_count_addresses(struct inet6_dev *idev) |
| 975 | { |
| 976 | int cnt = 0; |
| 977 | struct inet6_ifaddr *ifp; |
| 978 | |
| 979 | read_lock_bh(&idev->lock); |
| 980 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) |
| 981 | cnt++; |
| 982 | read_unlock_bh(&idev->lock); |
| 983 | return cnt; |
| 984 | } |
| 985 | |
| 986 | int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict) |
| 987 | { |
| 988 | struct inet6_ifaddr * ifp; |
| 989 | u8 hash = ipv6_addr_hash(addr); |
| 990 | |
| 991 | read_lock_bh(&addrconf_hash_lock); |
| 992 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { |
| 993 | if (ipv6_addr_equal(&ifp->addr, addr) && |
| 994 | !(ifp->flags&IFA_F_TENTATIVE)) { |
| 995 | if (dev == NULL || ifp->idev->dev == dev || |
| 996 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) |
| 997 | break; |
| 998 | } |
| 999 | } |
| 1000 | read_unlock_bh(&addrconf_hash_lock); |
| 1001 | return ifp != NULL; |
| 1002 | } |
| 1003 | |
| 1004 | static |
| 1005 | int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev) |
| 1006 | { |
| 1007 | struct inet6_ifaddr * ifp; |
| 1008 | u8 hash = ipv6_addr_hash(addr); |
| 1009 | |
| 1010 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { |
| 1011 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
| 1012 | if (dev == NULL || ifp->idev->dev == dev) |
| 1013 | break; |
| 1014 | } |
| 1015 | } |
| 1016 | return ifp != NULL; |
| 1017 | } |
| 1018 | |
| 1019 | struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict) |
| 1020 | { |
| 1021 | struct inet6_ifaddr * ifp; |
| 1022 | u8 hash = ipv6_addr_hash(addr); |
| 1023 | |
| 1024 | read_lock_bh(&addrconf_hash_lock); |
| 1025 | for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) { |
| 1026 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
| 1027 | if (dev == NULL || ifp->idev->dev == dev || |
| 1028 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
| 1029 | in6_ifa_hold(ifp); |
| 1030 | break; |
| 1031 | } |
| 1032 | } |
| 1033 | } |
| 1034 | read_unlock_bh(&addrconf_hash_lock); |
| 1035 | |
| 1036 | return ifp; |
| 1037 | } |
| 1038 | |
| 1039 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) |
| 1040 | { |
| 1041 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; |
| 1042 | const struct in6_addr *sk2_rcv_saddr6 = tcp_v6_rcv_saddr(sk2); |
| 1043 | u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr; |
Arnaldo Carvalho de Melo | 8feaf0c | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 1044 | u32 sk2_rcv_saddr = inet_rcv_saddr(sk2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | int sk_ipv6only = ipv6_only_sock(sk); |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame^] | 1046 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); |
| 1048 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; |
| 1049 | |
| 1050 | if (!sk2_rcv_saddr && !sk_ipv6only) |
| 1051 | return 1; |
| 1052 | |
| 1053 | if (addr_type2 == IPV6_ADDR_ANY && |
| 1054 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) |
| 1055 | return 1; |
| 1056 | |
| 1057 | if (addr_type == IPV6_ADDR_ANY && |
| 1058 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) |
| 1059 | return 1; |
| 1060 | |
| 1061 | if (sk2_rcv_saddr6 && |
| 1062 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) |
| 1063 | return 1; |
| 1064 | |
| 1065 | if (addr_type == IPV6_ADDR_MAPPED && |
| 1066 | !sk2_ipv6only && |
| 1067 | (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr)) |
| 1068 | return 1; |
| 1069 | |
| 1070 | return 0; |
| 1071 | } |
| 1072 | |
| 1073 | /* Gets referenced address, destroys ifaddr */ |
| 1074 | |
| 1075 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
| 1076 | { |
| 1077 | if (net_ratelimit()) |
| 1078 | printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name); |
| 1079 | if (ifp->flags&IFA_F_PERMANENT) { |
| 1080 | spin_lock_bh(&ifp->lock); |
| 1081 | addrconf_del_timer(ifp); |
| 1082 | ifp->flags |= IFA_F_TENTATIVE; |
| 1083 | spin_unlock_bh(&ifp->lock); |
| 1084 | in6_ifa_put(ifp); |
| 1085 | #ifdef CONFIG_IPV6_PRIVACY |
| 1086 | } else if (ifp->flags&IFA_F_TEMPORARY) { |
| 1087 | struct inet6_ifaddr *ifpub; |
| 1088 | spin_lock_bh(&ifp->lock); |
| 1089 | ifpub = ifp->ifpub; |
| 1090 | if (ifpub) { |
| 1091 | in6_ifa_hold(ifpub); |
| 1092 | spin_unlock_bh(&ifp->lock); |
| 1093 | ipv6_create_tempaddr(ifpub, ifp); |
| 1094 | in6_ifa_put(ifpub); |
| 1095 | } else { |
| 1096 | spin_unlock_bh(&ifp->lock); |
| 1097 | } |
| 1098 | ipv6_del_addr(ifp); |
| 1099 | #endif |
| 1100 | } else |
| 1101 | ipv6_del_addr(ifp); |
| 1102 | } |
| 1103 | |
| 1104 | |
| 1105 | /* Join to solicited addr multicast group. */ |
| 1106 | |
| 1107 | void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr) |
| 1108 | { |
| 1109 | struct in6_addr maddr; |
| 1110 | |
| 1111 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) |
| 1112 | return; |
| 1113 | |
| 1114 | addrconf_addr_solict_mult(addr, &maddr); |
| 1115 | ipv6_dev_mc_inc(dev, &maddr); |
| 1116 | } |
| 1117 | |
| 1118 | void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr) |
| 1119 | { |
| 1120 | struct in6_addr maddr; |
| 1121 | |
| 1122 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) |
| 1123 | return; |
| 1124 | |
| 1125 | addrconf_addr_solict_mult(addr, &maddr); |
| 1126 | __ipv6_dev_mc_dec(idev, &maddr); |
| 1127 | } |
| 1128 | |
| 1129 | void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
| 1130 | { |
| 1131 | struct in6_addr addr; |
| 1132 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
| 1133 | if (ipv6_addr_any(&addr)) |
| 1134 | return; |
| 1135 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); |
| 1136 | } |
| 1137 | |
| 1138 | void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
| 1139 | { |
| 1140 | struct in6_addr addr; |
| 1141 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
| 1142 | if (ipv6_addr_any(&addr)) |
| 1143 | return; |
| 1144 | __ipv6_dev_ac_dec(ifp->idev, &addr); |
| 1145 | } |
| 1146 | |
| 1147 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
| 1148 | { |
| 1149 | switch (dev->type) { |
| 1150 | case ARPHRD_ETHER: |
| 1151 | case ARPHRD_FDDI: |
| 1152 | case ARPHRD_IEEE802_TR: |
| 1153 | if (dev->addr_len != ETH_ALEN) |
| 1154 | return -1; |
| 1155 | memcpy(eui, dev->dev_addr, 3); |
| 1156 | memcpy(eui + 5, dev->dev_addr + 3, 3); |
| 1157 | |
| 1158 | /* |
| 1159 | * The zSeries OSA network cards can be shared among various |
| 1160 | * OS instances, but the OSA cards have only one MAC address. |
| 1161 | * This leads to duplicate address conflicts in conjunction |
| 1162 | * with IPv6 if more than one instance uses the same card. |
| 1163 | * |
| 1164 | * The driver for these cards can deliver a unique 16-bit |
| 1165 | * identifier for each instance sharing the same card. It is |
| 1166 | * placed instead of 0xFFFE in the interface identifier. The |
| 1167 | * "u" bit of the interface identifier is not inverted in this |
| 1168 | * case. Hence the resulting interface identifier has local |
| 1169 | * scope according to RFC2373. |
| 1170 | */ |
| 1171 | if (dev->dev_id) { |
| 1172 | eui[3] = (dev->dev_id >> 8) & 0xFF; |
| 1173 | eui[4] = dev->dev_id & 0xFF; |
| 1174 | } else { |
| 1175 | eui[3] = 0xFF; |
| 1176 | eui[4] = 0xFE; |
| 1177 | eui[0] ^= 2; |
| 1178 | } |
| 1179 | return 0; |
| 1180 | case ARPHRD_ARCNET: |
| 1181 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ |
| 1182 | if (dev->addr_len != ARCNET_ALEN) |
| 1183 | return -1; |
| 1184 | memset(eui, 0, 7); |
| 1185 | eui[7] = *(u8*)dev->dev_addr; |
| 1186 | return 0; |
| 1187 | case ARPHRD_INFINIBAND: |
| 1188 | if (dev->addr_len != INFINIBAND_ALEN) |
| 1189 | return -1; |
| 1190 | memcpy(eui, dev->dev_addr + 12, 8); |
| 1191 | eui[0] |= 2; |
| 1192 | return 0; |
| 1193 | } |
| 1194 | return -1; |
| 1195 | } |
| 1196 | |
| 1197 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) |
| 1198 | { |
| 1199 | int err = -1; |
| 1200 | struct inet6_ifaddr *ifp; |
| 1201 | |
| 1202 | read_lock_bh(&idev->lock); |
| 1203 | for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { |
| 1204 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
| 1205 | memcpy(eui, ifp->addr.s6_addr+8, 8); |
| 1206 | err = 0; |
| 1207 | break; |
| 1208 | } |
| 1209 | } |
| 1210 | read_unlock_bh(&idev->lock); |
| 1211 | return err; |
| 1212 | } |
| 1213 | |
| 1214 | #ifdef CONFIG_IPV6_PRIVACY |
| 1215 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
| 1216 | static int __ipv6_regen_rndid(struct inet6_dev *idev) |
| 1217 | { |
| 1218 | struct net_device *dev; |
| 1219 | struct scatterlist sg[2]; |
| 1220 | |
| 1221 | sg[0].page = virt_to_page(idev->entropy); |
| 1222 | sg[0].offset = offset_in_page(idev->entropy); |
| 1223 | sg[0].length = 8; |
| 1224 | sg[1].page = virt_to_page(idev->work_eui64); |
| 1225 | sg[1].offset = offset_in_page(idev->work_eui64); |
| 1226 | sg[1].length = 8; |
| 1227 | |
| 1228 | dev = idev->dev; |
| 1229 | |
| 1230 | if (ipv6_generate_eui64(idev->work_eui64, dev)) { |
| 1231 | printk(KERN_INFO |
| 1232 | "__ipv6_regen_rndid(idev=%p): cannot get EUI64 identifier; use random bytes.\n", |
| 1233 | idev); |
| 1234 | get_random_bytes(idev->work_eui64, sizeof(idev->work_eui64)); |
| 1235 | } |
| 1236 | regen: |
| 1237 | spin_lock(&md5_tfm_lock); |
| 1238 | if (unlikely(md5_tfm == NULL)) { |
| 1239 | spin_unlock(&md5_tfm_lock); |
| 1240 | return -1; |
| 1241 | } |
| 1242 | crypto_digest_init(md5_tfm); |
| 1243 | crypto_digest_update(md5_tfm, sg, 2); |
| 1244 | crypto_digest_final(md5_tfm, idev->work_digest); |
| 1245 | spin_unlock(&md5_tfm_lock); |
| 1246 | |
| 1247 | memcpy(idev->rndid, &idev->work_digest[0], 8); |
| 1248 | idev->rndid[0] &= ~0x02; |
| 1249 | memcpy(idev->entropy, &idev->work_digest[8], 8); |
| 1250 | |
| 1251 | /* |
| 1252 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: |
| 1253 | * check if generated address is not inappropriate |
| 1254 | * |
| 1255 | * - Reserved subnet anycast (RFC 2526) |
| 1256 | * 11111101 11....11 1xxxxxxx |
| 1257 | * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1 |
| 1258 | * 00-00-5E-FE-xx-xx-xx-xx |
| 1259 | * - value 0 |
| 1260 | * - XXX: already assigned to an address on the device |
| 1261 | */ |
| 1262 | if (idev->rndid[0] == 0xfd && |
| 1263 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
| 1264 | (idev->rndid[7]&0x80)) |
| 1265 | goto regen; |
| 1266 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { |
| 1267 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) |
| 1268 | goto regen; |
| 1269 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) |
| 1270 | goto regen; |
| 1271 | } |
| 1272 | |
| 1273 | return 0; |
| 1274 | } |
| 1275 | |
| 1276 | static void ipv6_regen_rndid(unsigned long data) |
| 1277 | { |
| 1278 | struct inet6_dev *idev = (struct inet6_dev *) data; |
| 1279 | unsigned long expires; |
| 1280 | |
| 1281 | read_lock_bh(&addrconf_lock); |
| 1282 | write_lock_bh(&idev->lock); |
| 1283 | |
| 1284 | if (idev->dead) |
| 1285 | goto out; |
| 1286 | |
| 1287 | if (__ipv6_regen_rndid(idev) < 0) |
| 1288 | goto out; |
| 1289 | |
| 1290 | expires = jiffies + |
| 1291 | idev->cnf.temp_prefered_lft * HZ - |
| 1292 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor; |
| 1293 | if (time_before(expires, jiffies)) { |
| 1294 | printk(KERN_WARNING |
| 1295 | "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n", |
| 1296 | idev->dev->name); |
| 1297 | goto out; |
| 1298 | } |
| 1299 | |
| 1300 | if (!mod_timer(&idev->regen_timer, expires)) |
| 1301 | in6_dev_hold(idev); |
| 1302 | |
| 1303 | out: |
| 1304 | write_unlock_bh(&idev->lock); |
| 1305 | read_unlock_bh(&addrconf_lock); |
| 1306 | in6_dev_put(idev); |
| 1307 | } |
| 1308 | |
| 1309 | static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) { |
| 1310 | int ret = 0; |
| 1311 | |
| 1312 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
| 1313 | ret = __ipv6_regen_rndid(idev); |
| 1314 | return ret; |
| 1315 | } |
| 1316 | #endif |
| 1317 | |
| 1318 | /* |
| 1319 | * Add prefix route. |
| 1320 | */ |
| 1321 | |
| 1322 | static void |
| 1323 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 1324 | unsigned long expires, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | { |
| 1326 | struct in6_rtmsg rtmsg; |
| 1327 | |
| 1328 | memset(&rtmsg, 0, sizeof(rtmsg)); |
| 1329 | ipv6_addr_copy(&rtmsg.rtmsg_dst, pfx); |
| 1330 | rtmsg.rtmsg_dst_len = plen; |
| 1331 | rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF; |
| 1332 | rtmsg.rtmsg_ifindex = dev->ifindex; |
| 1333 | rtmsg.rtmsg_info = expires; |
| 1334 | rtmsg.rtmsg_flags = RTF_UP|flags; |
| 1335 | rtmsg.rtmsg_type = RTMSG_NEWROUTE; |
| 1336 | |
| 1337 | /* Prevent useless cloning on PtP SIT. |
| 1338 | This thing is done here expecting that the whole |
| 1339 | class of non-broadcast devices need not cloning. |
| 1340 | */ |
| 1341 | if (dev->type == ARPHRD_SIT && (dev->flags&IFF_POINTOPOINT)) |
| 1342 | rtmsg.rtmsg_flags |= RTF_NONEXTHOP; |
| 1343 | |
Jamal Hadi Salim | 0d51aa8 | 2005-06-21 13:51:04 -0700 | [diff] [blame] | 1344 | ip6_route_add(&rtmsg, NULL, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | } |
| 1346 | |
| 1347 | /* Create "default" multicast route to the interface */ |
| 1348 | |
| 1349 | static void addrconf_add_mroute(struct net_device *dev) |
| 1350 | { |
| 1351 | struct in6_rtmsg rtmsg; |
| 1352 | |
| 1353 | memset(&rtmsg, 0, sizeof(rtmsg)); |
| 1354 | ipv6_addr_set(&rtmsg.rtmsg_dst, |
| 1355 | htonl(0xFF000000), 0, 0, 0); |
| 1356 | rtmsg.rtmsg_dst_len = 8; |
| 1357 | rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF; |
| 1358 | rtmsg.rtmsg_ifindex = dev->ifindex; |
| 1359 | rtmsg.rtmsg_flags = RTF_UP; |
| 1360 | rtmsg.rtmsg_type = RTMSG_NEWROUTE; |
Jamal Hadi Salim | 0d51aa8 | 2005-06-21 13:51:04 -0700 | [diff] [blame] | 1361 | ip6_route_add(&rtmsg, NULL, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | } |
| 1363 | |
| 1364 | static void sit_route_add(struct net_device *dev) |
| 1365 | { |
| 1366 | struct in6_rtmsg rtmsg; |
| 1367 | |
| 1368 | memset(&rtmsg, 0, sizeof(rtmsg)); |
| 1369 | |
| 1370 | rtmsg.rtmsg_type = RTMSG_NEWROUTE; |
| 1371 | rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF; |
| 1372 | |
| 1373 | /* prefix length - 96 bits "::d.d.d.d" */ |
| 1374 | rtmsg.rtmsg_dst_len = 96; |
| 1375 | rtmsg.rtmsg_flags = RTF_UP|RTF_NONEXTHOP; |
| 1376 | rtmsg.rtmsg_ifindex = dev->ifindex; |
| 1377 | |
Jamal Hadi Salim | 0d51aa8 | 2005-06-21 13:51:04 -0700 | [diff] [blame] | 1378 | ip6_route_add(&rtmsg, NULL, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | } |
| 1380 | |
| 1381 | static void addrconf_add_lroute(struct net_device *dev) |
| 1382 | { |
| 1383 | struct in6_addr addr; |
| 1384 | |
| 1385 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
| 1386 | addrconf_prefix_route(&addr, 64, dev, 0, 0); |
| 1387 | } |
| 1388 | |
| 1389 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
| 1390 | { |
| 1391 | struct inet6_dev *idev; |
| 1392 | |
| 1393 | ASSERT_RTNL(); |
| 1394 | |
| 1395 | if ((idev = ipv6_find_idev(dev)) == NULL) |
| 1396 | return NULL; |
| 1397 | |
| 1398 | /* Add default multicast route */ |
| 1399 | addrconf_add_mroute(dev); |
| 1400 | |
| 1401 | /* Add link local route */ |
| 1402 | addrconf_add_lroute(dev); |
| 1403 | return idev; |
| 1404 | } |
| 1405 | |
| 1406 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) |
| 1407 | { |
| 1408 | struct prefix_info *pinfo; |
| 1409 | __u32 valid_lft; |
| 1410 | __u32 prefered_lft; |
| 1411 | int addr_type; |
| 1412 | unsigned long rt_expires; |
| 1413 | struct inet6_dev *in6_dev; |
| 1414 | |
| 1415 | pinfo = (struct prefix_info *) opt; |
| 1416 | |
| 1417 | if (len < sizeof(struct prefix_info)) { |
| 1418 | ADBG(("addrconf: prefix option too short\n")); |
| 1419 | return; |
| 1420 | } |
| 1421 | |
| 1422 | /* |
| 1423 | * Validation checks ([ADDRCONF], page 19) |
| 1424 | */ |
| 1425 | |
| 1426 | addr_type = ipv6_addr_type(&pinfo->prefix); |
| 1427 | |
| 1428 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) |
| 1429 | return; |
| 1430 | |
| 1431 | valid_lft = ntohl(pinfo->valid); |
| 1432 | prefered_lft = ntohl(pinfo->prefered); |
| 1433 | |
| 1434 | if (prefered_lft > valid_lft) { |
| 1435 | if (net_ratelimit()) |
| 1436 | printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n"); |
| 1437 | return; |
| 1438 | } |
| 1439 | |
| 1440 | in6_dev = in6_dev_get(dev); |
| 1441 | |
| 1442 | if (in6_dev == NULL) { |
| 1443 | if (net_ratelimit()) |
| 1444 | printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name); |
| 1445 | return; |
| 1446 | } |
| 1447 | |
| 1448 | /* |
| 1449 | * Two things going on here: |
| 1450 | * 1) Add routes for on-link prefixes |
| 1451 | * 2) Configure prefixes with the auto flag set |
| 1452 | */ |
| 1453 | |
| 1454 | /* Avoid arithmetic overflow. Really, we could |
| 1455 | save rt_expires in seconds, likely valid_lft, |
| 1456 | but it would require division in fib gc, that it |
| 1457 | not good. |
| 1458 | */ |
| 1459 | if (valid_lft >= 0x7FFFFFFF/HZ) |
| 1460 | rt_expires = 0; |
| 1461 | else |
| 1462 | rt_expires = jiffies + valid_lft * HZ; |
| 1463 | |
| 1464 | if (pinfo->onlink) { |
| 1465 | struct rt6_info *rt; |
| 1466 | rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1); |
| 1467 | |
| 1468 | if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) { |
| 1469 | if (rt->rt6i_flags&RTF_EXPIRES) { |
| 1470 | if (valid_lft == 0) { |
Jamal Hadi Salim | 0d51aa8 | 2005-06-21 13:51:04 -0700 | [diff] [blame] | 1471 | ip6_del_rt(rt, NULL, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | rt = NULL; |
| 1473 | } else { |
| 1474 | rt->rt6i_expires = rt_expires; |
| 1475 | } |
| 1476 | } |
| 1477 | } else if (valid_lft) { |
| 1478 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
| 1479 | dev, rt_expires, RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); |
| 1480 | } |
| 1481 | if (rt) |
| 1482 | dst_release(&rt->u.dst); |
| 1483 | } |
| 1484 | |
| 1485 | /* Try to figure out our local address for this prefix */ |
| 1486 | |
| 1487 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { |
| 1488 | struct inet6_ifaddr * ifp; |
| 1489 | struct in6_addr addr; |
| 1490 | int create = 0, update_lft = 0; |
| 1491 | |
| 1492 | if (pinfo->prefix_len == 64) { |
| 1493 | memcpy(&addr, &pinfo->prefix, 8); |
| 1494 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
| 1495 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { |
| 1496 | in6_dev_put(in6_dev); |
| 1497 | return; |
| 1498 | } |
| 1499 | goto ok; |
| 1500 | } |
| 1501 | if (net_ratelimit()) |
| 1502 | printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n", |
| 1503 | pinfo->prefix_len); |
| 1504 | in6_dev_put(in6_dev); |
| 1505 | return; |
| 1506 | |
| 1507 | ok: |
| 1508 | |
| 1509 | ifp = ipv6_get_ifaddr(&addr, dev, 1); |
| 1510 | |
| 1511 | if (ifp == NULL && valid_lft) { |
| 1512 | int max_addresses = in6_dev->cnf.max_addresses; |
| 1513 | |
| 1514 | /* Do not allow to create too much of autoconfigured |
| 1515 | * addresses; this would be too easy way to crash kernel. |
| 1516 | */ |
| 1517 | if (!max_addresses || |
| 1518 | ipv6_count_addresses(in6_dev) < max_addresses) |
| 1519 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, |
| 1520 | addr_type&IPV6_ADDR_SCOPE_MASK, 0); |
| 1521 | |
| 1522 | if (!ifp || IS_ERR(ifp)) { |
| 1523 | in6_dev_put(in6_dev); |
| 1524 | return; |
| 1525 | } |
| 1526 | |
| 1527 | update_lft = create = 1; |
| 1528 | ifp->cstamp = jiffies; |
| 1529 | addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT); |
| 1530 | } |
| 1531 | |
| 1532 | if (ifp) { |
| 1533 | int flags; |
| 1534 | unsigned long now; |
| 1535 | #ifdef CONFIG_IPV6_PRIVACY |
| 1536 | struct inet6_ifaddr *ift; |
| 1537 | #endif |
| 1538 | u32 stored_lft; |
| 1539 | |
| 1540 | /* update lifetime (RFC2462 5.5.3 e) */ |
| 1541 | spin_lock(&ifp->lock); |
| 1542 | now = jiffies; |
| 1543 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) |
| 1544 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; |
| 1545 | else |
| 1546 | stored_lft = 0; |
| 1547 | if (!update_lft && stored_lft) { |
| 1548 | if (valid_lft > MIN_VALID_LIFETIME || |
| 1549 | valid_lft > stored_lft) |
| 1550 | update_lft = 1; |
| 1551 | else if (stored_lft <= MIN_VALID_LIFETIME) { |
| 1552 | /* valid_lft <= stored_lft is always true */ |
| 1553 | /* XXX: IPsec */ |
| 1554 | update_lft = 0; |
| 1555 | } else { |
| 1556 | valid_lft = MIN_VALID_LIFETIME; |
| 1557 | if (valid_lft < prefered_lft) |
| 1558 | prefered_lft = valid_lft; |
| 1559 | update_lft = 1; |
| 1560 | } |
| 1561 | } |
| 1562 | |
| 1563 | if (update_lft) { |
| 1564 | ifp->valid_lft = valid_lft; |
| 1565 | ifp->prefered_lft = prefered_lft; |
| 1566 | ifp->tstamp = now; |
| 1567 | flags = ifp->flags; |
| 1568 | ifp->flags &= ~IFA_F_DEPRECATED; |
| 1569 | spin_unlock(&ifp->lock); |
| 1570 | |
| 1571 | if (!(flags&IFA_F_TENTATIVE)) |
| 1572 | ipv6_ifa_notify(0, ifp); |
| 1573 | } else |
| 1574 | spin_unlock(&ifp->lock); |
| 1575 | |
| 1576 | #ifdef CONFIG_IPV6_PRIVACY |
| 1577 | read_lock_bh(&in6_dev->lock); |
| 1578 | /* update all temporary addresses in the list */ |
| 1579 | for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) { |
| 1580 | /* |
| 1581 | * When adjusting the lifetimes of an existing |
| 1582 | * temporary address, only lower the lifetimes. |
| 1583 | * Implementations must not increase the |
| 1584 | * lifetimes of an existing temporary address |
| 1585 | * when processing a Prefix Information Option. |
| 1586 | */ |
| 1587 | spin_lock(&ift->lock); |
| 1588 | flags = ift->flags; |
| 1589 | if (ift->valid_lft > valid_lft && |
| 1590 | ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ) |
| 1591 | ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ; |
| 1592 | if (ift->prefered_lft > prefered_lft && |
| 1593 | ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ) |
| 1594 | ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ; |
| 1595 | spin_unlock(&ift->lock); |
| 1596 | if (!(flags&IFA_F_TENTATIVE)) |
| 1597 | ipv6_ifa_notify(0, ift); |
| 1598 | } |
| 1599 | |
| 1600 | if (create && in6_dev->cnf.use_tempaddr > 0) { |
| 1601 | /* |
| 1602 | * When a new public address is created as described in [ADDRCONF], |
| 1603 | * also create a new temporary address. |
| 1604 | */ |
| 1605 | read_unlock_bh(&in6_dev->lock); |
| 1606 | ipv6_create_tempaddr(ifp, NULL); |
| 1607 | } else { |
| 1608 | read_unlock_bh(&in6_dev->lock); |
| 1609 | } |
| 1610 | #endif |
| 1611 | in6_ifa_put(ifp); |
| 1612 | addrconf_verify(0); |
| 1613 | } |
| 1614 | } |
| 1615 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); |
| 1616 | in6_dev_put(in6_dev); |
| 1617 | } |
| 1618 | |
| 1619 | /* |
| 1620 | * Set destination address. |
| 1621 | * Special case for SIT interfaces where we create a new "virtual" |
| 1622 | * device. |
| 1623 | */ |
| 1624 | int addrconf_set_dstaddr(void __user *arg) |
| 1625 | { |
| 1626 | struct in6_ifreq ireq; |
| 1627 | struct net_device *dev; |
| 1628 | int err = -EINVAL; |
| 1629 | |
| 1630 | rtnl_lock(); |
| 1631 | |
| 1632 | err = -EFAULT; |
| 1633 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 1634 | goto err_exit; |
| 1635 | |
| 1636 | dev = __dev_get_by_index(ireq.ifr6_ifindex); |
| 1637 | |
| 1638 | err = -ENODEV; |
| 1639 | if (dev == NULL) |
| 1640 | goto err_exit; |
| 1641 | |
| 1642 | if (dev->type == ARPHRD_SIT) { |
| 1643 | struct ifreq ifr; |
| 1644 | mm_segment_t oldfs; |
| 1645 | struct ip_tunnel_parm p; |
| 1646 | |
| 1647 | err = -EADDRNOTAVAIL; |
| 1648 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) |
| 1649 | goto err_exit; |
| 1650 | |
| 1651 | memset(&p, 0, sizeof(p)); |
| 1652 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; |
| 1653 | p.iph.saddr = 0; |
| 1654 | p.iph.version = 4; |
| 1655 | p.iph.ihl = 5; |
| 1656 | p.iph.protocol = IPPROTO_IPV6; |
| 1657 | p.iph.ttl = 64; |
| 1658 | ifr.ifr_ifru.ifru_data = (void __user *)&p; |
| 1659 | |
| 1660 | oldfs = get_fs(); set_fs(KERNEL_DS); |
| 1661 | err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); |
| 1662 | set_fs(oldfs); |
| 1663 | |
| 1664 | if (err == 0) { |
| 1665 | err = -ENOBUFS; |
| 1666 | if ((dev = __dev_get_by_name(p.name)) == NULL) |
| 1667 | goto err_exit; |
| 1668 | err = dev_open(dev); |
| 1669 | } |
| 1670 | } |
| 1671 | |
| 1672 | err_exit: |
| 1673 | rtnl_unlock(); |
| 1674 | return err; |
| 1675 | } |
| 1676 | |
| 1677 | /* |
| 1678 | * Manual configuration of address on an interface |
| 1679 | */ |
| 1680 | static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen) |
| 1681 | { |
| 1682 | struct inet6_ifaddr *ifp; |
| 1683 | struct inet6_dev *idev; |
| 1684 | struct net_device *dev; |
| 1685 | int scope; |
| 1686 | |
| 1687 | ASSERT_RTNL(); |
| 1688 | |
| 1689 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
| 1690 | return -ENODEV; |
| 1691 | |
| 1692 | if (!(dev->flags&IFF_UP)) |
| 1693 | return -ENETDOWN; |
| 1694 | |
| 1695 | if ((idev = addrconf_add_dev(dev)) == NULL) |
| 1696 | return -ENOBUFS; |
| 1697 | |
| 1698 | scope = ipv6_addr_scope(pfx); |
| 1699 | |
| 1700 | ifp = ipv6_add_addr(idev, pfx, plen, scope, IFA_F_PERMANENT); |
| 1701 | if (!IS_ERR(ifp)) { |
| 1702 | addrconf_dad_start(ifp, 0); |
| 1703 | in6_ifa_put(ifp); |
| 1704 | return 0; |
| 1705 | } |
| 1706 | |
| 1707 | return PTR_ERR(ifp); |
| 1708 | } |
| 1709 | |
| 1710 | static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen) |
| 1711 | { |
| 1712 | struct inet6_ifaddr *ifp; |
| 1713 | struct inet6_dev *idev; |
| 1714 | struct net_device *dev; |
| 1715 | |
| 1716 | if ((dev = __dev_get_by_index(ifindex)) == NULL) |
| 1717 | return -ENODEV; |
| 1718 | |
| 1719 | if ((idev = __in6_dev_get(dev)) == NULL) |
| 1720 | return -ENXIO; |
| 1721 | |
| 1722 | read_lock_bh(&idev->lock); |
| 1723 | for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) { |
| 1724 | if (ifp->prefix_len == plen && |
| 1725 | ipv6_addr_equal(pfx, &ifp->addr)) { |
| 1726 | in6_ifa_hold(ifp); |
| 1727 | read_unlock_bh(&idev->lock); |
| 1728 | |
| 1729 | ipv6_del_addr(ifp); |
| 1730 | |
| 1731 | /* If the last address is deleted administratively, |
| 1732 | disable IPv6 on this interface. |
| 1733 | */ |
| 1734 | if (idev->addr_list == NULL) |
| 1735 | addrconf_ifdown(idev->dev, 1); |
| 1736 | return 0; |
| 1737 | } |
| 1738 | } |
| 1739 | read_unlock_bh(&idev->lock); |
| 1740 | return -EADDRNOTAVAIL; |
| 1741 | } |
| 1742 | |
| 1743 | |
| 1744 | int addrconf_add_ifaddr(void __user *arg) |
| 1745 | { |
| 1746 | struct in6_ifreq ireq; |
| 1747 | int err; |
| 1748 | |
| 1749 | if (!capable(CAP_NET_ADMIN)) |
| 1750 | return -EPERM; |
| 1751 | |
| 1752 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 1753 | return -EFAULT; |
| 1754 | |
| 1755 | rtnl_lock(); |
| 1756 | err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); |
| 1757 | rtnl_unlock(); |
| 1758 | return err; |
| 1759 | } |
| 1760 | |
| 1761 | int addrconf_del_ifaddr(void __user *arg) |
| 1762 | { |
| 1763 | struct in6_ifreq ireq; |
| 1764 | int err; |
| 1765 | |
| 1766 | if (!capable(CAP_NET_ADMIN)) |
| 1767 | return -EPERM; |
| 1768 | |
| 1769 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
| 1770 | return -EFAULT; |
| 1771 | |
| 1772 | rtnl_lock(); |
| 1773 | err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen); |
| 1774 | rtnl_unlock(); |
| 1775 | return err; |
| 1776 | } |
| 1777 | |
| 1778 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
| 1779 | { |
| 1780 | struct inet6_ifaddr * ifp; |
| 1781 | struct in6_addr addr; |
| 1782 | struct net_device *dev; |
| 1783 | int scope; |
| 1784 | |
| 1785 | ASSERT_RTNL(); |
| 1786 | |
| 1787 | memset(&addr, 0, sizeof(struct in6_addr)); |
| 1788 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); |
| 1789 | |
| 1790 | if (idev->dev->flags&IFF_POINTOPOINT) { |
| 1791 | addr.s6_addr32[0] = htonl(0xfe800000); |
| 1792 | scope = IFA_LINK; |
| 1793 | } else { |
| 1794 | scope = IPV6_ADDR_COMPATv4; |
| 1795 | } |
| 1796 | |
| 1797 | if (addr.s6_addr32[3]) { |
| 1798 | ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT); |
| 1799 | if (!IS_ERR(ifp)) { |
| 1800 | spin_lock_bh(&ifp->lock); |
| 1801 | ifp->flags &= ~IFA_F_TENTATIVE; |
| 1802 | spin_unlock_bh(&ifp->lock); |
| 1803 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 1804 | in6_ifa_put(ifp); |
| 1805 | } |
| 1806 | return; |
| 1807 | } |
| 1808 | |
| 1809 | for (dev = dev_base; dev != NULL; dev = dev->next) { |
| 1810 | struct in_device * in_dev = __in_dev_get(dev); |
| 1811 | if (in_dev && (dev->flags & IFF_UP)) { |
| 1812 | struct in_ifaddr * ifa; |
| 1813 | |
| 1814 | int flag = scope; |
| 1815 | |
| 1816 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
| 1817 | int plen; |
| 1818 | |
| 1819 | addr.s6_addr32[3] = ifa->ifa_local; |
| 1820 | |
| 1821 | if (ifa->ifa_scope == RT_SCOPE_LINK) |
| 1822 | continue; |
| 1823 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { |
| 1824 | if (idev->dev->flags&IFF_POINTOPOINT) |
| 1825 | continue; |
| 1826 | flag |= IFA_HOST; |
| 1827 | } |
| 1828 | if (idev->dev->flags&IFF_POINTOPOINT) |
| 1829 | plen = 64; |
| 1830 | else |
| 1831 | plen = 96; |
| 1832 | |
| 1833 | ifp = ipv6_add_addr(idev, &addr, plen, flag, |
| 1834 | IFA_F_PERMANENT); |
| 1835 | if (!IS_ERR(ifp)) { |
| 1836 | spin_lock_bh(&ifp->lock); |
| 1837 | ifp->flags &= ~IFA_F_TENTATIVE; |
| 1838 | spin_unlock_bh(&ifp->lock); |
| 1839 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 1840 | in6_ifa_put(ifp); |
| 1841 | } |
| 1842 | } |
| 1843 | } |
| 1844 | } |
| 1845 | } |
| 1846 | |
| 1847 | static void init_loopback(struct net_device *dev) |
| 1848 | { |
| 1849 | struct inet6_dev *idev; |
| 1850 | struct inet6_ifaddr * ifp; |
| 1851 | |
| 1852 | /* ::1 */ |
| 1853 | |
| 1854 | ASSERT_RTNL(); |
| 1855 | |
| 1856 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
| 1857 | printk(KERN_DEBUG "init loopback: add_dev failed\n"); |
| 1858 | return; |
| 1859 | } |
| 1860 | |
| 1861 | ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT); |
| 1862 | if (!IS_ERR(ifp)) { |
| 1863 | spin_lock_bh(&ifp->lock); |
| 1864 | ifp->flags &= ~IFA_F_TENTATIVE; |
| 1865 | spin_unlock_bh(&ifp->lock); |
| 1866 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 1867 | in6_ifa_put(ifp); |
| 1868 | } |
| 1869 | } |
| 1870 | |
| 1871 | static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr) |
| 1872 | { |
| 1873 | struct inet6_ifaddr * ifp; |
| 1874 | |
| 1875 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT); |
| 1876 | if (!IS_ERR(ifp)) { |
| 1877 | addrconf_dad_start(ifp, 0); |
| 1878 | in6_ifa_put(ifp); |
| 1879 | } |
| 1880 | } |
| 1881 | |
| 1882 | static void addrconf_dev_config(struct net_device *dev) |
| 1883 | { |
| 1884 | struct in6_addr addr; |
| 1885 | struct inet6_dev * idev; |
| 1886 | |
| 1887 | ASSERT_RTNL(); |
| 1888 | |
| 1889 | if ((dev->type != ARPHRD_ETHER) && |
| 1890 | (dev->type != ARPHRD_FDDI) && |
| 1891 | (dev->type != ARPHRD_IEEE802_TR) && |
| 1892 | (dev->type != ARPHRD_ARCNET) && |
| 1893 | (dev->type != ARPHRD_INFINIBAND)) { |
| 1894 | /* Alas, we support only Ethernet autoconfiguration. */ |
| 1895 | return; |
| 1896 | } |
| 1897 | |
| 1898 | idev = addrconf_add_dev(dev); |
| 1899 | if (idev == NULL) |
| 1900 | return; |
| 1901 | |
| 1902 | memset(&addr, 0, sizeof(struct in6_addr)); |
| 1903 | addr.s6_addr32[0] = htonl(0xFE800000); |
| 1904 | |
| 1905 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) |
| 1906 | addrconf_add_linklocal(idev, &addr); |
| 1907 | } |
| 1908 | |
| 1909 | static void addrconf_sit_config(struct net_device *dev) |
| 1910 | { |
| 1911 | struct inet6_dev *idev; |
| 1912 | |
| 1913 | ASSERT_RTNL(); |
| 1914 | |
| 1915 | /* |
| 1916 | * Configure the tunnel with one of our IPv4 |
| 1917 | * addresses... we should configure all of |
| 1918 | * our v4 addrs in the tunnel |
| 1919 | */ |
| 1920 | |
| 1921 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
| 1922 | printk(KERN_DEBUG "init sit: add_dev failed\n"); |
| 1923 | return; |
| 1924 | } |
| 1925 | |
| 1926 | sit_add_v4_addrs(idev); |
| 1927 | |
| 1928 | if (dev->flags&IFF_POINTOPOINT) { |
| 1929 | addrconf_add_mroute(dev); |
| 1930 | addrconf_add_lroute(dev); |
| 1931 | } else |
| 1932 | sit_route_add(dev); |
| 1933 | } |
| 1934 | |
| 1935 | static inline int |
| 1936 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) |
| 1937 | { |
| 1938 | struct in6_addr lladdr; |
| 1939 | |
| 1940 | if (!ipv6_get_lladdr(link_dev, &lladdr)) { |
| 1941 | addrconf_add_linklocal(idev, &lladdr); |
| 1942 | return 0; |
| 1943 | } |
| 1944 | return -1; |
| 1945 | } |
| 1946 | |
| 1947 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) |
| 1948 | { |
| 1949 | struct net_device *link_dev; |
| 1950 | |
| 1951 | /* first try to inherit the link-local address from the link device */ |
| 1952 | if (idev->dev->iflink && |
| 1953 | (link_dev = __dev_get_by_index(idev->dev->iflink))) { |
| 1954 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
| 1955 | return; |
| 1956 | } |
| 1957 | /* then try to inherit it from any device */ |
| 1958 | for (link_dev = dev_base; link_dev; link_dev = link_dev->next) { |
| 1959 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
| 1960 | return; |
| 1961 | } |
| 1962 | printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n"); |
| 1963 | } |
| 1964 | |
| 1965 | /* |
| 1966 | * Autoconfigure tunnel with a link-local address so routing protocols, |
| 1967 | * DHCPv6, MLD etc. can be run over the virtual link |
| 1968 | */ |
| 1969 | |
| 1970 | static void addrconf_ip6_tnl_config(struct net_device *dev) |
| 1971 | { |
| 1972 | struct inet6_dev *idev; |
| 1973 | |
| 1974 | ASSERT_RTNL(); |
| 1975 | |
| 1976 | if ((idev = addrconf_add_dev(dev)) == NULL) { |
| 1977 | printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n"); |
| 1978 | return; |
| 1979 | } |
| 1980 | ip6_tnl_add_linklocal(idev); |
| 1981 | addrconf_add_mroute(dev); |
| 1982 | } |
| 1983 | |
| 1984 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
| 1985 | void * data) |
| 1986 | { |
| 1987 | struct net_device *dev = (struct net_device *) data; |
| 1988 | struct inet6_dev *idev = __in6_dev_get(dev); |
| 1989 | |
| 1990 | switch(event) { |
| 1991 | case NETDEV_UP: |
| 1992 | switch(dev->type) { |
| 1993 | case ARPHRD_SIT: |
| 1994 | addrconf_sit_config(dev); |
| 1995 | break; |
| 1996 | case ARPHRD_TUNNEL6: |
| 1997 | addrconf_ip6_tnl_config(dev); |
| 1998 | break; |
| 1999 | case ARPHRD_LOOPBACK: |
| 2000 | init_loopback(dev); |
| 2001 | break; |
| 2002 | |
| 2003 | default: |
| 2004 | addrconf_dev_config(dev); |
| 2005 | break; |
| 2006 | }; |
| 2007 | if (idev) { |
| 2008 | /* If the MTU changed during the interface down, when the |
| 2009 | interface up, the changed MTU must be reflected in the |
| 2010 | idev as well as routers. |
| 2011 | */ |
| 2012 | if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) { |
| 2013 | rt6_mtu_change(dev, dev->mtu); |
| 2014 | idev->cnf.mtu6 = dev->mtu; |
| 2015 | } |
| 2016 | idev->tstamp = jiffies; |
| 2017 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
| 2018 | /* If the changed mtu during down is lower than IPV6_MIN_MTU |
| 2019 | stop IPv6 on this interface. |
| 2020 | */ |
| 2021 | if (dev->mtu < IPV6_MIN_MTU) |
| 2022 | addrconf_ifdown(dev, event != NETDEV_DOWN); |
| 2023 | } |
| 2024 | break; |
| 2025 | |
| 2026 | case NETDEV_CHANGEMTU: |
| 2027 | if ( idev && dev->mtu >= IPV6_MIN_MTU) { |
| 2028 | rt6_mtu_change(dev, dev->mtu); |
| 2029 | idev->cnf.mtu6 = dev->mtu; |
| 2030 | break; |
| 2031 | } |
| 2032 | |
| 2033 | /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */ |
| 2034 | |
| 2035 | case NETDEV_DOWN: |
| 2036 | case NETDEV_UNREGISTER: |
| 2037 | /* |
| 2038 | * Remove all addresses from this interface. |
| 2039 | */ |
| 2040 | addrconf_ifdown(dev, event != NETDEV_DOWN); |
| 2041 | break; |
| 2042 | case NETDEV_CHANGE: |
| 2043 | break; |
| 2044 | case NETDEV_CHANGENAME: |
| 2045 | #ifdef CONFIG_SYSCTL |
| 2046 | if (idev) { |
| 2047 | addrconf_sysctl_unregister(&idev->cnf); |
| 2048 | neigh_sysctl_unregister(idev->nd_parms); |
| 2049 | neigh_sysctl_register(dev, idev->nd_parms, |
| 2050 | NET_IPV6, NET_IPV6_NEIGH, "ipv6", |
| 2051 | &ndisc_ifinfo_sysctl_change, |
| 2052 | NULL); |
| 2053 | addrconf_sysctl_register(idev, &idev->cnf); |
| 2054 | } |
| 2055 | #endif |
| 2056 | break; |
| 2057 | }; |
| 2058 | |
| 2059 | return NOTIFY_OK; |
| 2060 | } |
| 2061 | |
| 2062 | /* |
| 2063 | * addrconf module should be notified of a device going up |
| 2064 | */ |
| 2065 | static struct notifier_block ipv6_dev_notf = { |
| 2066 | .notifier_call = addrconf_notify, |
| 2067 | .priority = 0 |
| 2068 | }; |
| 2069 | |
| 2070 | static int addrconf_ifdown(struct net_device *dev, int how) |
| 2071 | { |
| 2072 | struct inet6_dev *idev; |
| 2073 | struct inet6_ifaddr *ifa, **bifa; |
| 2074 | int i; |
| 2075 | |
| 2076 | ASSERT_RTNL(); |
| 2077 | |
| 2078 | if (dev == &loopback_dev && how == 1) |
| 2079 | how = 0; |
| 2080 | |
| 2081 | rt6_ifdown(dev); |
| 2082 | neigh_ifdown(&nd_tbl, dev); |
| 2083 | |
| 2084 | idev = __in6_dev_get(dev); |
| 2085 | if (idev == NULL) |
| 2086 | return -ENODEV; |
| 2087 | |
| 2088 | /* Step 1: remove reference to ipv6 device from parent device. |
| 2089 | Do not dev_put! |
| 2090 | */ |
| 2091 | if (how == 1) { |
| 2092 | write_lock_bh(&addrconf_lock); |
| 2093 | dev->ip6_ptr = NULL; |
| 2094 | idev->dead = 1; |
| 2095 | write_unlock_bh(&addrconf_lock); |
| 2096 | |
| 2097 | /* Step 1.5: remove snmp6 entry */ |
| 2098 | snmp6_unregister_dev(idev); |
| 2099 | |
| 2100 | } |
| 2101 | |
| 2102 | /* Step 2: clear hash table */ |
| 2103 | for (i=0; i<IN6_ADDR_HSIZE; i++) { |
| 2104 | bifa = &inet6_addr_lst[i]; |
| 2105 | |
| 2106 | write_lock_bh(&addrconf_hash_lock); |
| 2107 | while ((ifa = *bifa) != NULL) { |
| 2108 | if (ifa->idev == idev) { |
| 2109 | *bifa = ifa->lst_next; |
| 2110 | ifa->lst_next = NULL; |
| 2111 | addrconf_del_timer(ifa); |
| 2112 | in6_ifa_put(ifa); |
| 2113 | continue; |
| 2114 | } |
| 2115 | bifa = &ifa->lst_next; |
| 2116 | } |
| 2117 | write_unlock_bh(&addrconf_hash_lock); |
| 2118 | } |
| 2119 | |
| 2120 | write_lock_bh(&idev->lock); |
| 2121 | |
| 2122 | /* Step 3: clear flags for stateless addrconf */ |
| 2123 | if (how != 1) |
| 2124 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD); |
| 2125 | |
| 2126 | /* Step 4: clear address list */ |
| 2127 | #ifdef CONFIG_IPV6_PRIVACY |
| 2128 | if (how == 1 && del_timer(&idev->regen_timer)) |
| 2129 | in6_dev_put(idev); |
| 2130 | |
| 2131 | /* clear tempaddr list */ |
| 2132 | while ((ifa = idev->tempaddr_list) != NULL) { |
| 2133 | idev->tempaddr_list = ifa->tmp_next; |
| 2134 | ifa->tmp_next = NULL; |
| 2135 | ifa->dead = 1; |
| 2136 | write_unlock_bh(&idev->lock); |
| 2137 | spin_lock_bh(&ifa->lock); |
| 2138 | |
| 2139 | if (ifa->ifpub) { |
| 2140 | in6_ifa_put(ifa->ifpub); |
| 2141 | ifa->ifpub = NULL; |
| 2142 | } |
| 2143 | spin_unlock_bh(&ifa->lock); |
| 2144 | in6_ifa_put(ifa); |
| 2145 | write_lock_bh(&idev->lock); |
| 2146 | } |
| 2147 | #endif |
| 2148 | while ((ifa = idev->addr_list) != NULL) { |
| 2149 | idev->addr_list = ifa->if_next; |
| 2150 | ifa->if_next = NULL; |
| 2151 | ifa->dead = 1; |
| 2152 | addrconf_del_timer(ifa); |
| 2153 | write_unlock_bh(&idev->lock); |
| 2154 | |
| 2155 | __ipv6_ifa_notify(RTM_DELADDR, ifa); |
| 2156 | in6_ifa_put(ifa); |
| 2157 | |
| 2158 | write_lock_bh(&idev->lock); |
| 2159 | } |
| 2160 | write_unlock_bh(&idev->lock); |
| 2161 | |
| 2162 | /* Step 5: Discard multicast list */ |
| 2163 | |
| 2164 | if (how == 1) |
| 2165 | ipv6_mc_destroy_dev(idev); |
| 2166 | else |
| 2167 | ipv6_mc_down(idev); |
| 2168 | |
| 2169 | /* Step 5: netlink notification of this interface */ |
| 2170 | idev->tstamp = jiffies; |
| 2171 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
| 2172 | |
| 2173 | /* Shot the device (if unregistered) */ |
| 2174 | |
| 2175 | if (how == 1) { |
| 2176 | #ifdef CONFIG_SYSCTL |
| 2177 | addrconf_sysctl_unregister(&idev->cnf); |
| 2178 | neigh_sysctl_unregister(idev->nd_parms); |
| 2179 | #endif |
| 2180 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
| 2181 | neigh_ifdown(&nd_tbl, dev); |
| 2182 | in6_dev_put(idev); |
| 2183 | } |
| 2184 | return 0; |
| 2185 | } |
| 2186 | |
| 2187 | static void addrconf_rs_timer(unsigned long data) |
| 2188 | { |
| 2189 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; |
| 2190 | |
| 2191 | if (ifp->idev->cnf.forwarding) |
| 2192 | goto out; |
| 2193 | |
| 2194 | if (ifp->idev->if_flags & IF_RA_RCVD) { |
| 2195 | /* |
| 2196 | * Announcement received after solicitation |
| 2197 | * was sent |
| 2198 | */ |
| 2199 | goto out; |
| 2200 | } |
| 2201 | |
| 2202 | spin_lock(&ifp->lock); |
| 2203 | if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) { |
| 2204 | struct in6_addr all_routers; |
| 2205 | |
| 2206 | /* The wait after the last probe can be shorter */ |
| 2207 | addrconf_mod_timer(ifp, AC_RS, |
| 2208 | (ifp->probes == ifp->idev->cnf.rtr_solicits) ? |
| 2209 | ifp->idev->cnf.rtr_solicit_delay : |
| 2210 | ifp->idev->cnf.rtr_solicit_interval); |
| 2211 | spin_unlock(&ifp->lock); |
| 2212 | |
| 2213 | ipv6_addr_all_routers(&all_routers); |
| 2214 | |
| 2215 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); |
| 2216 | } else { |
| 2217 | spin_unlock(&ifp->lock); |
| 2218 | /* |
| 2219 | * Note: we do not support deprecated "all on-link" |
| 2220 | * assumption any longer. |
| 2221 | */ |
| 2222 | printk(KERN_DEBUG "%s: no IPv6 routers present\n", |
| 2223 | ifp->idev->dev->name); |
| 2224 | } |
| 2225 | |
| 2226 | out: |
| 2227 | in6_ifa_put(ifp); |
| 2228 | } |
| 2229 | |
| 2230 | /* |
| 2231 | * Duplicate Address Detection |
| 2232 | */ |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 2233 | static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2234 | { |
| 2235 | struct inet6_dev *idev = ifp->idev; |
| 2236 | struct net_device *dev = idev->dev; |
| 2237 | unsigned long rand_num; |
| 2238 | |
| 2239 | addrconf_join_solict(dev, &ifp->addr); |
| 2240 | |
| 2241 | if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT)) |
| 2242 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0, |
| 2243 | flags); |
| 2244 | |
| 2245 | net_srandom(ifp->addr.s6_addr32[3]); |
| 2246 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); |
| 2247 | |
| 2248 | read_lock_bh(&idev->lock); |
| 2249 | if (ifp->dead) |
| 2250 | goto out; |
| 2251 | spin_lock_bh(&ifp->lock); |
| 2252 | |
| 2253 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || |
| 2254 | !(ifp->flags&IFA_F_TENTATIVE)) { |
| 2255 | ifp->flags &= ~IFA_F_TENTATIVE; |
| 2256 | spin_unlock_bh(&ifp->lock); |
| 2257 | read_unlock_bh(&idev->lock); |
| 2258 | |
| 2259 | addrconf_dad_completed(ifp); |
| 2260 | return; |
| 2261 | } |
| 2262 | |
| 2263 | ifp->probes = idev->cnf.dad_transmits; |
| 2264 | addrconf_mod_timer(ifp, AC_DAD, rand_num); |
| 2265 | |
| 2266 | spin_unlock_bh(&ifp->lock); |
| 2267 | out: |
| 2268 | read_unlock_bh(&idev->lock); |
| 2269 | } |
| 2270 | |
| 2271 | static void addrconf_dad_timer(unsigned long data) |
| 2272 | { |
| 2273 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; |
| 2274 | struct inet6_dev *idev = ifp->idev; |
| 2275 | struct in6_addr unspec; |
| 2276 | struct in6_addr mcaddr; |
| 2277 | |
| 2278 | read_lock_bh(&idev->lock); |
| 2279 | if (idev->dead) { |
| 2280 | read_unlock_bh(&idev->lock); |
| 2281 | goto out; |
| 2282 | } |
| 2283 | spin_lock_bh(&ifp->lock); |
| 2284 | if (ifp->probes == 0) { |
| 2285 | /* |
| 2286 | * DAD was successful |
| 2287 | */ |
| 2288 | |
| 2289 | ifp->flags &= ~IFA_F_TENTATIVE; |
| 2290 | spin_unlock_bh(&ifp->lock); |
| 2291 | read_unlock_bh(&idev->lock); |
| 2292 | |
| 2293 | addrconf_dad_completed(ifp); |
| 2294 | |
| 2295 | goto out; |
| 2296 | } |
| 2297 | |
| 2298 | ifp->probes--; |
| 2299 | addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time); |
| 2300 | spin_unlock_bh(&ifp->lock); |
| 2301 | read_unlock_bh(&idev->lock); |
| 2302 | |
| 2303 | /* send a neighbour solicitation for our addr */ |
| 2304 | memset(&unspec, 0, sizeof(unspec)); |
| 2305 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
| 2306 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec); |
| 2307 | out: |
| 2308 | in6_ifa_put(ifp); |
| 2309 | } |
| 2310 | |
| 2311 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) |
| 2312 | { |
| 2313 | struct net_device * dev = ifp->idev->dev; |
| 2314 | |
| 2315 | /* |
| 2316 | * Configure the address for reception. Now it is valid. |
| 2317 | */ |
| 2318 | |
| 2319 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
| 2320 | |
| 2321 | /* If added prefix is link local and forwarding is off, |
| 2322 | start sending router solicitations. |
| 2323 | */ |
| 2324 | |
| 2325 | if (ifp->idev->cnf.forwarding == 0 && |
| 2326 | ifp->idev->cnf.rtr_solicits > 0 && |
| 2327 | (dev->flags&IFF_LOOPBACK) == 0 && |
| 2328 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { |
| 2329 | struct in6_addr all_routers; |
| 2330 | |
| 2331 | ipv6_addr_all_routers(&all_routers); |
| 2332 | |
| 2333 | /* |
| 2334 | * If a host as already performed a random delay |
| 2335 | * [...] as part of DAD [...] there is no need |
| 2336 | * to delay again before sending the first RS |
| 2337 | */ |
| 2338 | ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers); |
| 2339 | |
| 2340 | spin_lock_bh(&ifp->lock); |
| 2341 | ifp->probes = 1; |
| 2342 | ifp->idev->if_flags |= IF_RS_SENT; |
| 2343 | addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval); |
| 2344 | spin_unlock_bh(&ifp->lock); |
| 2345 | } |
| 2346 | } |
| 2347 | |
| 2348 | #ifdef CONFIG_PROC_FS |
| 2349 | struct if6_iter_state { |
| 2350 | int bucket; |
| 2351 | }; |
| 2352 | |
| 2353 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq) |
| 2354 | { |
| 2355 | struct inet6_ifaddr *ifa = NULL; |
| 2356 | struct if6_iter_state *state = seq->private; |
| 2357 | |
| 2358 | for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { |
| 2359 | ifa = inet6_addr_lst[state->bucket]; |
| 2360 | if (ifa) |
| 2361 | break; |
| 2362 | } |
| 2363 | return ifa; |
| 2364 | } |
| 2365 | |
| 2366 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa) |
| 2367 | { |
| 2368 | struct if6_iter_state *state = seq->private; |
| 2369 | |
| 2370 | ifa = ifa->lst_next; |
| 2371 | try_again: |
| 2372 | if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) { |
| 2373 | ifa = inet6_addr_lst[state->bucket]; |
| 2374 | goto try_again; |
| 2375 | } |
| 2376 | return ifa; |
| 2377 | } |
| 2378 | |
| 2379 | static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos) |
| 2380 | { |
| 2381 | struct inet6_ifaddr *ifa = if6_get_first(seq); |
| 2382 | |
| 2383 | if (ifa) |
| 2384 | while(pos && (ifa = if6_get_next(seq, ifa)) != NULL) |
| 2385 | --pos; |
| 2386 | return pos ? NULL : ifa; |
| 2387 | } |
| 2388 | |
| 2389 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
| 2390 | { |
| 2391 | read_lock_bh(&addrconf_hash_lock); |
| 2392 | return if6_get_idx(seq, *pos); |
| 2393 | } |
| 2394 | |
| 2395 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 2396 | { |
| 2397 | struct inet6_ifaddr *ifa; |
| 2398 | |
| 2399 | ifa = if6_get_next(seq, v); |
| 2400 | ++*pos; |
| 2401 | return ifa; |
| 2402 | } |
| 2403 | |
| 2404 | static void if6_seq_stop(struct seq_file *seq, void *v) |
| 2405 | { |
| 2406 | read_unlock_bh(&addrconf_hash_lock); |
| 2407 | } |
| 2408 | |
| 2409 | static int if6_seq_show(struct seq_file *seq, void *v) |
| 2410 | { |
| 2411 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; |
| 2412 | seq_printf(seq, |
| 2413 | "%04x%04x%04x%04x%04x%04x%04x%04x %02x %02x %02x %02x %8s\n", |
| 2414 | NIP6(ifp->addr), |
| 2415 | ifp->idev->dev->ifindex, |
| 2416 | ifp->prefix_len, |
| 2417 | ifp->scope, |
| 2418 | ifp->flags, |
| 2419 | ifp->idev->dev->name); |
| 2420 | return 0; |
| 2421 | } |
| 2422 | |
| 2423 | static struct seq_operations if6_seq_ops = { |
| 2424 | .start = if6_seq_start, |
| 2425 | .next = if6_seq_next, |
| 2426 | .show = if6_seq_show, |
| 2427 | .stop = if6_seq_stop, |
| 2428 | }; |
| 2429 | |
| 2430 | static int if6_seq_open(struct inode *inode, struct file *file) |
| 2431 | { |
| 2432 | struct seq_file *seq; |
| 2433 | int rc = -ENOMEM; |
| 2434 | struct if6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL); |
| 2435 | |
| 2436 | if (!s) |
| 2437 | goto out; |
| 2438 | memset(s, 0, sizeof(*s)); |
| 2439 | |
| 2440 | rc = seq_open(file, &if6_seq_ops); |
| 2441 | if (rc) |
| 2442 | goto out_kfree; |
| 2443 | |
| 2444 | seq = file->private_data; |
| 2445 | seq->private = s; |
| 2446 | out: |
| 2447 | return rc; |
| 2448 | out_kfree: |
| 2449 | kfree(s); |
| 2450 | goto out; |
| 2451 | } |
| 2452 | |
| 2453 | static struct file_operations if6_fops = { |
| 2454 | .owner = THIS_MODULE, |
| 2455 | .open = if6_seq_open, |
| 2456 | .read = seq_read, |
| 2457 | .llseek = seq_lseek, |
| 2458 | .release = seq_release_private, |
| 2459 | }; |
| 2460 | |
| 2461 | int __init if6_proc_init(void) |
| 2462 | { |
| 2463 | if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops)) |
| 2464 | return -ENOMEM; |
| 2465 | return 0; |
| 2466 | } |
| 2467 | |
| 2468 | void if6_proc_exit(void) |
| 2469 | { |
| 2470 | proc_net_remove("if_inet6"); |
| 2471 | } |
| 2472 | #endif /* CONFIG_PROC_FS */ |
| 2473 | |
| 2474 | /* |
| 2475 | * Periodic address status verification |
| 2476 | */ |
| 2477 | |
| 2478 | static void addrconf_verify(unsigned long foo) |
| 2479 | { |
| 2480 | struct inet6_ifaddr *ifp; |
| 2481 | unsigned long now, next; |
| 2482 | int i; |
| 2483 | |
| 2484 | spin_lock_bh(&addrconf_verify_lock); |
| 2485 | now = jiffies; |
| 2486 | next = now + ADDR_CHECK_FREQUENCY; |
| 2487 | |
| 2488 | del_timer(&addr_chk_timer); |
| 2489 | |
| 2490 | for (i=0; i < IN6_ADDR_HSIZE; i++) { |
| 2491 | |
| 2492 | restart: |
| 2493 | write_lock(&addrconf_hash_lock); |
| 2494 | for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) { |
| 2495 | unsigned long age; |
| 2496 | #ifdef CONFIG_IPV6_PRIVACY |
| 2497 | unsigned long regen_advance; |
| 2498 | #endif |
| 2499 | |
| 2500 | if (ifp->flags & IFA_F_PERMANENT) |
| 2501 | continue; |
| 2502 | |
| 2503 | spin_lock(&ifp->lock); |
| 2504 | age = (now - ifp->tstamp) / HZ; |
| 2505 | |
| 2506 | #ifdef CONFIG_IPV6_PRIVACY |
| 2507 | regen_advance = ifp->idev->cnf.regen_max_retry * |
| 2508 | ifp->idev->cnf.dad_transmits * |
| 2509 | ifp->idev->nd_parms->retrans_time / HZ; |
| 2510 | #endif |
| 2511 | |
| 2512 | if (age >= ifp->valid_lft) { |
| 2513 | spin_unlock(&ifp->lock); |
| 2514 | in6_ifa_hold(ifp); |
| 2515 | write_unlock(&addrconf_hash_lock); |
| 2516 | ipv6_del_addr(ifp); |
| 2517 | goto restart; |
| 2518 | } else if (age >= ifp->prefered_lft) { |
| 2519 | /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */ |
| 2520 | int deprecate = 0; |
| 2521 | |
| 2522 | if (!(ifp->flags&IFA_F_DEPRECATED)) { |
| 2523 | deprecate = 1; |
| 2524 | ifp->flags |= IFA_F_DEPRECATED; |
| 2525 | } |
| 2526 | |
| 2527 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) |
| 2528 | next = ifp->tstamp + ifp->valid_lft * HZ; |
| 2529 | |
| 2530 | spin_unlock(&ifp->lock); |
| 2531 | |
| 2532 | if (deprecate) { |
| 2533 | in6_ifa_hold(ifp); |
| 2534 | write_unlock(&addrconf_hash_lock); |
| 2535 | |
| 2536 | ipv6_ifa_notify(0, ifp); |
| 2537 | in6_ifa_put(ifp); |
| 2538 | goto restart; |
| 2539 | } |
| 2540 | #ifdef CONFIG_IPV6_PRIVACY |
| 2541 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
| 2542 | !(ifp->flags&IFA_F_TENTATIVE)) { |
| 2543 | if (age >= ifp->prefered_lft - regen_advance) { |
| 2544 | struct inet6_ifaddr *ifpub = ifp->ifpub; |
| 2545 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) |
| 2546 | next = ifp->tstamp + ifp->prefered_lft * HZ; |
| 2547 | if (!ifp->regen_count && ifpub) { |
| 2548 | ifp->regen_count++; |
| 2549 | in6_ifa_hold(ifp); |
| 2550 | in6_ifa_hold(ifpub); |
| 2551 | spin_unlock(&ifp->lock); |
| 2552 | write_unlock(&addrconf_hash_lock); |
| 2553 | ipv6_create_tempaddr(ifpub, ifp); |
| 2554 | in6_ifa_put(ifpub); |
| 2555 | in6_ifa_put(ifp); |
| 2556 | goto restart; |
| 2557 | } |
| 2558 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) |
| 2559 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; |
| 2560 | spin_unlock(&ifp->lock); |
| 2561 | #endif |
| 2562 | } else { |
| 2563 | /* ifp->prefered_lft <= ifp->valid_lft */ |
| 2564 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) |
| 2565 | next = ifp->tstamp + ifp->prefered_lft * HZ; |
| 2566 | spin_unlock(&ifp->lock); |
| 2567 | } |
| 2568 | } |
| 2569 | write_unlock(&addrconf_hash_lock); |
| 2570 | } |
| 2571 | |
| 2572 | addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next; |
| 2573 | add_timer(&addr_chk_timer); |
| 2574 | spin_unlock_bh(&addrconf_verify_lock); |
| 2575 | } |
| 2576 | |
| 2577 | static int |
| 2578 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 2579 | { |
| 2580 | struct rtattr **rta = arg; |
| 2581 | struct ifaddrmsg *ifm = NLMSG_DATA(nlh); |
| 2582 | struct in6_addr *pfx; |
| 2583 | |
| 2584 | pfx = NULL; |
| 2585 | if (rta[IFA_ADDRESS-1]) { |
| 2586 | if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx)) |
| 2587 | return -EINVAL; |
| 2588 | pfx = RTA_DATA(rta[IFA_ADDRESS-1]); |
| 2589 | } |
| 2590 | if (rta[IFA_LOCAL-1]) { |
| 2591 | if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx))) |
| 2592 | return -EINVAL; |
| 2593 | pfx = RTA_DATA(rta[IFA_LOCAL-1]); |
| 2594 | } |
| 2595 | if (pfx == NULL) |
| 2596 | return -EINVAL; |
| 2597 | |
| 2598 | return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
| 2599 | } |
| 2600 | |
| 2601 | static int |
| 2602 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 2603 | { |
| 2604 | struct rtattr **rta = arg; |
| 2605 | struct ifaddrmsg *ifm = NLMSG_DATA(nlh); |
| 2606 | struct in6_addr *pfx; |
| 2607 | |
| 2608 | pfx = NULL; |
| 2609 | if (rta[IFA_ADDRESS-1]) { |
| 2610 | if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx)) |
| 2611 | return -EINVAL; |
| 2612 | pfx = RTA_DATA(rta[IFA_ADDRESS-1]); |
| 2613 | } |
| 2614 | if (rta[IFA_LOCAL-1]) { |
| 2615 | if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx))) |
| 2616 | return -EINVAL; |
| 2617 | pfx = RTA_DATA(rta[IFA_LOCAL-1]); |
| 2618 | } |
| 2619 | if (pfx == NULL) |
| 2620 | return -EINVAL; |
| 2621 | |
| 2622 | return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
| 2623 | } |
| 2624 | |
| 2625 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 2626 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2627 | { |
| 2628 | struct ifaddrmsg *ifm; |
| 2629 | struct nlmsghdr *nlh; |
| 2630 | struct ifa_cacheinfo ci; |
| 2631 | unsigned char *b = skb->tail; |
| 2632 | |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 2633 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2634 | ifm = NLMSG_DATA(nlh); |
| 2635 | ifm->ifa_family = AF_INET6; |
| 2636 | ifm->ifa_prefixlen = ifa->prefix_len; |
| 2637 | ifm->ifa_flags = ifa->flags; |
| 2638 | ifm->ifa_scope = RT_SCOPE_UNIVERSE; |
| 2639 | if (ifa->scope&IFA_HOST) |
| 2640 | ifm->ifa_scope = RT_SCOPE_HOST; |
| 2641 | else if (ifa->scope&IFA_LINK) |
| 2642 | ifm->ifa_scope = RT_SCOPE_LINK; |
| 2643 | else if (ifa->scope&IFA_SITE) |
| 2644 | ifm->ifa_scope = RT_SCOPE_SITE; |
| 2645 | ifm->ifa_index = ifa->idev->dev->ifindex; |
| 2646 | RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr); |
| 2647 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
| 2648 | ci.ifa_prefered = ifa->prefered_lft; |
| 2649 | ci.ifa_valid = ifa->valid_lft; |
| 2650 | if (ci.ifa_prefered != INFINITY_LIFE_TIME) { |
| 2651 | long tval = (jiffies - ifa->tstamp)/HZ; |
| 2652 | ci.ifa_prefered -= tval; |
| 2653 | if (ci.ifa_valid != INFINITY_LIFE_TIME) |
| 2654 | ci.ifa_valid -= tval; |
| 2655 | } |
| 2656 | } else { |
| 2657 | ci.ifa_prefered = INFINITY_LIFE_TIME; |
| 2658 | ci.ifa_valid = INFINITY_LIFE_TIME; |
| 2659 | } |
| 2660 | ci.cstamp = (__u32)(TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) / HZ * 100 |
| 2661 | + TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); |
| 2662 | ci.tstamp = (__u32)(TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) / HZ * 100 |
| 2663 | + TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); |
| 2664 | RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci); |
| 2665 | nlh->nlmsg_len = skb->tail - b; |
| 2666 | return skb->len; |
| 2667 | |
| 2668 | nlmsg_failure: |
| 2669 | rtattr_failure: |
| 2670 | skb_trim(skb, b - skb->data); |
| 2671 | return -1; |
| 2672 | } |
| 2673 | |
| 2674 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 2675 | u32 pid, u32 seq, int event, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2676 | { |
| 2677 | struct ifaddrmsg *ifm; |
| 2678 | struct nlmsghdr *nlh; |
| 2679 | struct ifa_cacheinfo ci; |
| 2680 | unsigned char *b = skb->tail; |
| 2681 | |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 2682 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2683 | ifm = NLMSG_DATA(nlh); |
| 2684 | ifm->ifa_family = AF_INET6; |
| 2685 | ifm->ifa_prefixlen = 128; |
| 2686 | ifm->ifa_flags = IFA_F_PERMANENT; |
| 2687 | ifm->ifa_scope = RT_SCOPE_UNIVERSE; |
| 2688 | if (ipv6_addr_scope(&ifmca->mca_addr)&IFA_SITE) |
| 2689 | ifm->ifa_scope = RT_SCOPE_SITE; |
| 2690 | ifm->ifa_index = ifmca->idev->dev->ifindex; |
| 2691 | RTA_PUT(skb, IFA_MULTICAST, 16, &ifmca->mca_addr); |
| 2692 | ci.cstamp = (__u32)(TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) / HZ |
| 2693 | * 100 + TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) % HZ |
| 2694 | * 100 / HZ); |
| 2695 | ci.tstamp = (__u32)(TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) / HZ |
| 2696 | * 100 + TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) % HZ |
| 2697 | * 100 / HZ); |
| 2698 | ci.ifa_prefered = INFINITY_LIFE_TIME; |
| 2699 | ci.ifa_valid = INFINITY_LIFE_TIME; |
| 2700 | RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci); |
| 2701 | nlh->nlmsg_len = skb->tail - b; |
| 2702 | return skb->len; |
| 2703 | |
| 2704 | nlmsg_failure: |
| 2705 | rtattr_failure: |
| 2706 | skb_trim(skb, b - skb->data); |
| 2707 | return -1; |
| 2708 | } |
| 2709 | |
| 2710 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 2711 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2712 | { |
| 2713 | struct ifaddrmsg *ifm; |
| 2714 | struct nlmsghdr *nlh; |
| 2715 | struct ifa_cacheinfo ci; |
| 2716 | unsigned char *b = skb->tail; |
| 2717 | |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 2718 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2719 | ifm = NLMSG_DATA(nlh); |
| 2720 | ifm->ifa_family = AF_INET6; |
| 2721 | ifm->ifa_prefixlen = 128; |
| 2722 | ifm->ifa_flags = IFA_F_PERMANENT; |
| 2723 | ifm->ifa_scope = RT_SCOPE_UNIVERSE; |
| 2724 | if (ipv6_addr_scope(&ifaca->aca_addr)&IFA_SITE) |
| 2725 | ifm->ifa_scope = RT_SCOPE_SITE; |
| 2726 | ifm->ifa_index = ifaca->aca_idev->dev->ifindex; |
| 2727 | RTA_PUT(skb, IFA_ANYCAST, 16, &ifaca->aca_addr); |
| 2728 | ci.cstamp = (__u32)(TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) / HZ |
| 2729 | * 100 + TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) % HZ |
| 2730 | * 100 / HZ); |
| 2731 | ci.tstamp = (__u32)(TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) / HZ |
| 2732 | * 100 + TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) % HZ |
| 2733 | * 100 / HZ); |
| 2734 | ci.ifa_prefered = INFINITY_LIFE_TIME; |
| 2735 | ci.ifa_valid = INFINITY_LIFE_TIME; |
| 2736 | RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci); |
| 2737 | nlh->nlmsg_len = skb->tail - b; |
| 2738 | return skb->len; |
| 2739 | |
| 2740 | nlmsg_failure: |
| 2741 | rtattr_failure: |
| 2742 | skb_trim(skb, b - skb->data); |
| 2743 | return -1; |
| 2744 | } |
| 2745 | |
| 2746 | enum addr_type_t |
| 2747 | { |
| 2748 | UNICAST_ADDR, |
| 2749 | MULTICAST_ADDR, |
| 2750 | ANYCAST_ADDR, |
| 2751 | }; |
| 2752 | |
| 2753 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
| 2754 | enum addr_type_t type) |
| 2755 | { |
| 2756 | int idx, ip_idx; |
| 2757 | int s_idx, s_ip_idx; |
| 2758 | int err = 1; |
| 2759 | struct net_device *dev; |
| 2760 | struct inet6_dev *idev = NULL; |
| 2761 | struct inet6_ifaddr *ifa; |
| 2762 | struct ifmcaddr6 *ifmca; |
| 2763 | struct ifacaddr6 *ifaca; |
| 2764 | |
| 2765 | s_idx = cb->args[0]; |
| 2766 | s_ip_idx = ip_idx = cb->args[1]; |
| 2767 | read_lock(&dev_base_lock); |
| 2768 | |
| 2769 | for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) { |
| 2770 | if (idx < s_idx) |
| 2771 | continue; |
| 2772 | if (idx > s_idx) |
| 2773 | s_ip_idx = 0; |
| 2774 | ip_idx = 0; |
| 2775 | if ((idev = in6_dev_get(dev)) == NULL) |
| 2776 | continue; |
| 2777 | read_lock_bh(&idev->lock); |
| 2778 | switch (type) { |
| 2779 | case UNICAST_ADDR: |
YOSHIFUJI Hideaki | ae9cda5 | 2005-06-28 13:00:30 -0700 | [diff] [blame] | 2780 | /* unicast address incl. temp addr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2781 | for (ifa = idev->addr_list; ifa; |
| 2782 | ifa = ifa->if_next, ip_idx++) { |
| 2783 | if (ip_idx < s_ip_idx) |
| 2784 | continue; |
| 2785 | if ((err = inet6_fill_ifaddr(skb, ifa, |
| 2786 | NETLINK_CB(cb->skb).pid, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 2787 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
| 2788 | NLM_F_MULTI)) <= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2789 | goto done; |
| 2790 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2791 | break; |
| 2792 | case MULTICAST_ADDR: |
| 2793 | /* multicast address */ |
| 2794 | for (ifmca = idev->mc_list; ifmca; |
| 2795 | ifmca = ifmca->next, ip_idx++) { |
| 2796 | if (ip_idx < s_ip_idx) |
| 2797 | continue; |
| 2798 | if ((err = inet6_fill_ifmcaddr(skb, ifmca, |
| 2799 | NETLINK_CB(cb->skb).pid, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 2800 | cb->nlh->nlmsg_seq, RTM_GETMULTICAST, |
| 2801 | NLM_F_MULTI)) <= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2802 | goto done; |
| 2803 | } |
| 2804 | break; |
| 2805 | case ANYCAST_ADDR: |
| 2806 | /* anycast address */ |
| 2807 | for (ifaca = idev->ac_list; ifaca; |
| 2808 | ifaca = ifaca->aca_next, ip_idx++) { |
| 2809 | if (ip_idx < s_ip_idx) |
| 2810 | continue; |
| 2811 | if ((err = inet6_fill_ifacaddr(skb, ifaca, |
| 2812 | NETLINK_CB(cb->skb).pid, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 2813 | cb->nlh->nlmsg_seq, RTM_GETANYCAST, |
| 2814 | NLM_F_MULTI)) <= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2815 | goto done; |
| 2816 | } |
| 2817 | break; |
| 2818 | default: |
| 2819 | break; |
| 2820 | } |
| 2821 | read_unlock_bh(&idev->lock); |
| 2822 | in6_dev_put(idev); |
| 2823 | } |
| 2824 | done: |
| 2825 | if (err <= 0) { |
| 2826 | read_unlock_bh(&idev->lock); |
| 2827 | in6_dev_put(idev); |
| 2828 | } |
| 2829 | read_unlock(&dev_base_lock); |
| 2830 | cb->args[0] = idx; |
| 2831 | cb->args[1] = ip_idx; |
| 2832 | return skb->len; |
| 2833 | } |
| 2834 | |
| 2835 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 2836 | { |
| 2837 | enum addr_type_t type = UNICAST_ADDR; |
| 2838 | return inet6_dump_addr(skb, cb, type); |
| 2839 | } |
| 2840 | |
| 2841 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 2842 | { |
| 2843 | enum addr_type_t type = MULTICAST_ADDR; |
| 2844 | return inet6_dump_addr(skb, cb, type); |
| 2845 | } |
| 2846 | |
| 2847 | |
| 2848 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) |
| 2849 | { |
| 2850 | enum addr_type_t type = ANYCAST_ADDR; |
| 2851 | return inet6_dump_addr(skb, cb, type); |
| 2852 | } |
| 2853 | |
| 2854 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
| 2855 | { |
| 2856 | struct sk_buff *skb; |
| 2857 | int size = NLMSG_SPACE(sizeof(struct ifaddrmsg)+128); |
| 2858 | |
| 2859 | skb = alloc_skb(size, GFP_ATOMIC); |
| 2860 | if (!skb) { |
| 2861 | netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFADDR, ENOBUFS); |
| 2862 | return; |
| 2863 | } |
Jamal Hadi Salim | 9ed19f3 | 2005-06-18 22:55:51 -0700 | [diff] [blame] | 2864 | if (inet6_fill_ifaddr(skb, ifa, current->pid, 0, event, 0) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2865 | kfree_skb(skb); |
| 2866 | netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFADDR, EINVAL); |
| 2867 | return; |
| 2868 | } |
| 2869 | NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_IFADDR; |
| 2870 | netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_IFADDR, GFP_ATOMIC); |
| 2871 | } |
| 2872 | |
| 2873 | static void inline ipv6_store_devconf(struct ipv6_devconf *cnf, |
| 2874 | __s32 *array, int bytes) |
| 2875 | { |
| 2876 | memset(array, 0, bytes); |
| 2877 | array[DEVCONF_FORWARDING] = cnf->forwarding; |
| 2878 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; |
| 2879 | array[DEVCONF_MTU6] = cnf->mtu6; |
| 2880 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; |
| 2881 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; |
| 2882 | array[DEVCONF_AUTOCONF] = cnf->autoconf; |
| 2883 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; |
| 2884 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; |
| 2885 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval; |
| 2886 | array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay; |
| 2887 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
| 2888 | #ifdef CONFIG_IPV6_PRIVACY |
| 2889 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
| 2890 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; |
| 2891 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; |
| 2892 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; |
| 2893 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; |
| 2894 | #endif |
| 2895 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
| 2896 | } |
| 2897 | |
| 2898 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 2899 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2900 | { |
| 2901 | struct net_device *dev = idev->dev; |
| 2902 | __s32 *array = NULL; |
| 2903 | struct ifinfomsg *r; |
| 2904 | struct nlmsghdr *nlh; |
| 2905 | unsigned char *b = skb->tail; |
| 2906 | struct rtattr *subattr; |
| 2907 | __u32 mtu = dev->mtu; |
| 2908 | struct ifla_cacheinfo ci; |
| 2909 | |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 2910 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2911 | r = NLMSG_DATA(nlh); |
| 2912 | r->ifi_family = AF_INET6; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 2913 | r->__ifi_pad = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2914 | r->ifi_type = dev->type; |
| 2915 | r->ifi_index = dev->ifindex; |
| 2916 | r->ifi_flags = dev_get_flags(dev); |
| 2917 | r->ifi_change = 0; |
| 2918 | |
| 2919 | RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name); |
| 2920 | |
| 2921 | if (dev->addr_len) |
| 2922 | RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
| 2923 | |
| 2924 | RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu); |
| 2925 | if (dev->ifindex != dev->iflink) |
| 2926 | RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink); |
| 2927 | |
| 2928 | subattr = (struct rtattr*)skb->tail; |
| 2929 | |
| 2930 | RTA_PUT(skb, IFLA_PROTINFO, 0, NULL); |
| 2931 | |
| 2932 | /* return the device flags */ |
| 2933 | RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags); |
| 2934 | |
| 2935 | /* return interface cacheinfo */ |
| 2936 | ci.max_reasm_len = IPV6_MAXPLEN; |
| 2937 | ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100 |
| 2938 | + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ); |
| 2939 | ci.reachable_time = idev->nd_parms->reachable_time; |
| 2940 | ci.retrans_time = idev->nd_parms->retrans_time; |
| 2941 | RTA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci); |
| 2942 | |
| 2943 | /* return the device sysctl params */ |
| 2944 | if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL) |
| 2945 | goto rtattr_failure; |
| 2946 | ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array)); |
| 2947 | RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array); |
| 2948 | |
| 2949 | /* XXX - Statistics/MC not implemented */ |
| 2950 | subattr->rta_len = skb->tail - (u8*)subattr; |
| 2951 | |
| 2952 | nlh->nlmsg_len = skb->tail - b; |
| 2953 | kfree(array); |
| 2954 | return skb->len; |
| 2955 | |
| 2956 | nlmsg_failure: |
| 2957 | rtattr_failure: |
| 2958 | if (array) |
| 2959 | kfree(array); |
| 2960 | skb_trim(skb, b - skb->data); |
| 2961 | return -1; |
| 2962 | } |
| 2963 | |
| 2964 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
| 2965 | { |
| 2966 | int idx, err; |
| 2967 | int s_idx = cb->args[0]; |
| 2968 | struct net_device *dev; |
| 2969 | struct inet6_dev *idev; |
| 2970 | |
| 2971 | read_lock(&dev_base_lock); |
| 2972 | for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) { |
| 2973 | if (idx < s_idx) |
| 2974 | continue; |
| 2975 | if ((idev = in6_dev_get(dev)) == NULL) |
| 2976 | continue; |
| 2977 | err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 2978 | cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2979 | in6_dev_put(idev); |
| 2980 | if (err <= 0) |
| 2981 | break; |
| 2982 | } |
| 2983 | read_unlock(&dev_base_lock); |
| 2984 | cb->args[0] = idx; |
| 2985 | |
| 2986 | return skb->len; |
| 2987 | } |
| 2988 | |
| 2989 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) |
| 2990 | { |
| 2991 | struct sk_buff *skb; |
| 2992 | /* 128 bytes ?? */ |
| 2993 | int size = NLMSG_SPACE(sizeof(struct ifinfomsg)+128); |
| 2994 | |
| 2995 | skb = alloc_skb(size, GFP_ATOMIC); |
| 2996 | if (!skb) { |
| 2997 | netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFINFO, ENOBUFS); |
| 2998 | return; |
| 2999 | } |
Jamal Hadi Salim | 9ed19f3 | 2005-06-18 22:55:51 -0700 | [diff] [blame] | 3000 | if (inet6_fill_ifinfo(skb, idev, current->pid, 0, event, 0) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3001 | kfree_skb(skb); |
| 3002 | netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFINFO, EINVAL); |
| 3003 | return; |
| 3004 | } |
| 3005 | NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_IFINFO; |
| 3006 | netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_IFINFO, GFP_ATOMIC); |
| 3007 | } |
| 3008 | |
| 3009 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 3010 | struct prefix_info *pinfo, u32 pid, u32 seq, |
| 3011 | int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3012 | { |
| 3013 | struct prefixmsg *pmsg; |
| 3014 | struct nlmsghdr *nlh; |
| 3015 | unsigned char *b = skb->tail; |
| 3016 | struct prefix_cacheinfo ci; |
| 3017 | |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 3018 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*pmsg), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3019 | pmsg = NLMSG_DATA(nlh); |
| 3020 | pmsg->prefix_family = AF_INET6; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 3021 | pmsg->prefix_pad1 = 0; |
| 3022 | pmsg->prefix_pad2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3023 | pmsg->prefix_ifindex = idev->dev->ifindex; |
| 3024 | pmsg->prefix_len = pinfo->prefix_len; |
| 3025 | pmsg->prefix_type = pinfo->type; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 3026 | pmsg->prefix_pad3 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3027 | |
| 3028 | pmsg->prefix_flags = 0; |
| 3029 | if (pinfo->onlink) |
| 3030 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; |
| 3031 | if (pinfo->autoconf) |
| 3032 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; |
| 3033 | |
| 3034 | RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix); |
| 3035 | |
| 3036 | ci.preferred_time = ntohl(pinfo->prefered); |
| 3037 | ci.valid_time = ntohl(pinfo->valid); |
| 3038 | RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci); |
| 3039 | |
| 3040 | nlh->nlmsg_len = skb->tail - b; |
| 3041 | return skb->len; |
| 3042 | |
| 3043 | nlmsg_failure: |
| 3044 | rtattr_failure: |
| 3045 | skb_trim(skb, b - skb->data); |
| 3046 | return -1; |
| 3047 | } |
| 3048 | |
| 3049 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
| 3050 | struct prefix_info *pinfo) |
| 3051 | { |
| 3052 | struct sk_buff *skb; |
| 3053 | int size = NLMSG_SPACE(sizeof(struct prefixmsg)+128); |
| 3054 | |
| 3055 | skb = alloc_skb(size, GFP_ATOMIC); |
| 3056 | if (!skb) { |
| 3057 | netlink_set_err(rtnl, 0, RTMGRP_IPV6_PREFIX, ENOBUFS); |
| 3058 | return; |
| 3059 | } |
Jamal Hadi Salim | 9ed19f3 | 2005-06-18 22:55:51 -0700 | [diff] [blame] | 3060 | if (inet6_fill_prefix(skb, idev, pinfo, current->pid, 0, event, 0) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3061 | kfree_skb(skb); |
| 3062 | netlink_set_err(rtnl, 0, RTMGRP_IPV6_PREFIX, EINVAL); |
| 3063 | return; |
| 3064 | } |
| 3065 | NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_PREFIX; |
| 3066 | netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_PREFIX, GFP_ATOMIC); |
| 3067 | } |
| 3068 | |
Thomas Graf | db46edc | 2005-05-03 14:29:39 -0700 | [diff] [blame] | 3069 | static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3070 | [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, }, |
| 3071 | [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, }, |
| 3072 | [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, }, |
| 3073 | [RTM_GETADDR - RTM_BASE] = { .dumpit = inet6_dump_ifaddr, }, |
| 3074 | [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, }, |
| 3075 | [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, }, |
| 3076 | [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, }, |
| 3077 | [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, }, |
| 3078 | [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute, |
| 3079 | .dumpit = inet6_dump_fib, }, |
| 3080 | }; |
| 3081 | |
| 3082 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
| 3083 | { |
| 3084 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
| 3085 | |
| 3086 | switch (event) { |
| 3087 | case RTM_NEWADDR: |
| 3088 | dst_hold(&ifp->rt->u.dst); |
Jamal Hadi Salim | 0d51aa8 | 2005-06-21 13:51:04 -0700 | [diff] [blame] | 3089 | if (ip6_ins_rt(ifp->rt, NULL, NULL, NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3090 | dst_release(&ifp->rt->u.dst); |
| 3091 | if (ifp->idev->cnf.forwarding) |
| 3092 | addrconf_join_anycast(ifp); |
| 3093 | break; |
| 3094 | case RTM_DELADDR: |
| 3095 | if (ifp->idev->cnf.forwarding) |
| 3096 | addrconf_leave_anycast(ifp); |
| 3097 | addrconf_leave_solict(ifp->idev, &ifp->addr); |
| 3098 | dst_hold(&ifp->rt->u.dst); |
Jamal Hadi Salim | 0d51aa8 | 2005-06-21 13:51:04 -0700 | [diff] [blame] | 3099 | if (ip6_del_rt(ifp->rt, NULL, NULL, NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3100 | dst_free(&ifp->rt->u.dst); |
| 3101 | else |
| 3102 | dst_release(&ifp->rt->u.dst); |
| 3103 | break; |
| 3104 | } |
| 3105 | } |
| 3106 | |
| 3107 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
| 3108 | { |
| 3109 | read_lock_bh(&addrconf_lock); |
| 3110 | if (likely(ifp->idev->dead == 0)) |
| 3111 | __ipv6_ifa_notify(event, ifp); |
| 3112 | read_unlock_bh(&addrconf_lock); |
| 3113 | } |
| 3114 | |
| 3115 | #ifdef CONFIG_SYSCTL |
| 3116 | |
| 3117 | static |
| 3118 | int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, |
| 3119 | void __user *buffer, size_t *lenp, loff_t *ppos) |
| 3120 | { |
| 3121 | int *valp = ctl->data; |
| 3122 | int val = *valp; |
| 3123 | int ret; |
| 3124 | |
| 3125 | ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); |
| 3126 | |
| 3127 | if (write && valp != &ipv6_devconf_dflt.forwarding) { |
| 3128 | if (valp != &ipv6_devconf.forwarding) { |
| 3129 | if ((!*valp) ^ (!val)) { |
| 3130 | struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; |
| 3131 | if (idev == NULL) |
| 3132 | return ret; |
| 3133 | dev_forward_change(idev); |
| 3134 | } |
| 3135 | } else { |
| 3136 | ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding; |
| 3137 | addrconf_forward_change(); |
| 3138 | } |
| 3139 | if (*valp) |
| 3140 | rt6_purge_dflt_routers(); |
| 3141 | } |
| 3142 | |
| 3143 | return ret; |
| 3144 | } |
| 3145 | |
| 3146 | static int addrconf_sysctl_forward_strategy(ctl_table *table, |
| 3147 | int __user *name, int nlen, |
| 3148 | void __user *oldval, |
| 3149 | size_t __user *oldlenp, |
| 3150 | void __user *newval, size_t newlen, |
| 3151 | void **context) |
| 3152 | { |
| 3153 | int *valp = table->data; |
| 3154 | int new; |
| 3155 | |
| 3156 | if (!newval || !newlen) |
| 3157 | return 0; |
| 3158 | if (newlen != sizeof(int)) |
| 3159 | return -EINVAL; |
| 3160 | if (get_user(new, (int __user *)newval)) |
| 3161 | return -EFAULT; |
| 3162 | if (new == *valp) |
| 3163 | return 0; |
| 3164 | if (oldval && oldlenp) { |
| 3165 | size_t len; |
| 3166 | if (get_user(len, oldlenp)) |
| 3167 | return -EFAULT; |
| 3168 | if (len) { |
| 3169 | if (len > table->maxlen) |
| 3170 | len = table->maxlen; |
| 3171 | if (copy_to_user(oldval, valp, len)) |
| 3172 | return -EFAULT; |
| 3173 | if (put_user(len, oldlenp)) |
| 3174 | return -EFAULT; |
| 3175 | } |
| 3176 | } |
| 3177 | |
| 3178 | if (valp != &ipv6_devconf_dflt.forwarding) { |
| 3179 | if (valp != &ipv6_devconf.forwarding) { |
| 3180 | struct inet6_dev *idev = (struct inet6_dev *)table->extra1; |
| 3181 | int changed; |
| 3182 | if (unlikely(idev == NULL)) |
| 3183 | return -ENODEV; |
| 3184 | changed = (!*valp) ^ (!new); |
| 3185 | *valp = new; |
| 3186 | if (changed) |
| 3187 | dev_forward_change(idev); |
| 3188 | } else { |
| 3189 | *valp = new; |
| 3190 | addrconf_forward_change(); |
| 3191 | } |
| 3192 | |
| 3193 | if (*valp) |
| 3194 | rt6_purge_dflt_routers(); |
| 3195 | } else |
| 3196 | *valp = new; |
| 3197 | |
| 3198 | return 1; |
| 3199 | } |
| 3200 | |
| 3201 | static struct addrconf_sysctl_table |
| 3202 | { |
| 3203 | struct ctl_table_header *sysctl_header; |
| 3204 | ctl_table addrconf_vars[__NET_IPV6_MAX]; |
| 3205 | ctl_table addrconf_dev[2]; |
| 3206 | ctl_table addrconf_conf_dir[2]; |
| 3207 | ctl_table addrconf_proto_dir[2]; |
| 3208 | ctl_table addrconf_root_dir[2]; |
| 3209 | } addrconf_sysctl = { |
| 3210 | .sysctl_header = NULL, |
| 3211 | .addrconf_vars = { |
| 3212 | { |
| 3213 | .ctl_name = NET_IPV6_FORWARDING, |
| 3214 | .procname = "forwarding", |
| 3215 | .data = &ipv6_devconf.forwarding, |
| 3216 | .maxlen = sizeof(int), |
| 3217 | .mode = 0644, |
| 3218 | .proc_handler = &addrconf_sysctl_forward, |
| 3219 | .strategy = &addrconf_sysctl_forward_strategy, |
| 3220 | }, |
| 3221 | { |
| 3222 | .ctl_name = NET_IPV6_HOP_LIMIT, |
| 3223 | .procname = "hop_limit", |
| 3224 | .data = &ipv6_devconf.hop_limit, |
| 3225 | .maxlen = sizeof(int), |
| 3226 | .mode = 0644, |
| 3227 | .proc_handler = proc_dointvec, |
| 3228 | }, |
| 3229 | { |
| 3230 | .ctl_name = NET_IPV6_MTU, |
| 3231 | .procname = "mtu", |
| 3232 | .data = &ipv6_devconf.mtu6, |
| 3233 | .maxlen = sizeof(int), |
| 3234 | .mode = 0644, |
| 3235 | .proc_handler = &proc_dointvec, |
| 3236 | }, |
| 3237 | { |
| 3238 | .ctl_name = NET_IPV6_ACCEPT_RA, |
| 3239 | .procname = "accept_ra", |
| 3240 | .data = &ipv6_devconf.accept_ra, |
| 3241 | .maxlen = sizeof(int), |
| 3242 | .mode = 0644, |
| 3243 | .proc_handler = &proc_dointvec, |
| 3244 | }, |
| 3245 | { |
| 3246 | .ctl_name = NET_IPV6_ACCEPT_REDIRECTS, |
| 3247 | .procname = "accept_redirects", |
| 3248 | .data = &ipv6_devconf.accept_redirects, |
| 3249 | .maxlen = sizeof(int), |
| 3250 | .mode = 0644, |
| 3251 | .proc_handler = &proc_dointvec, |
| 3252 | }, |
| 3253 | { |
| 3254 | .ctl_name = NET_IPV6_AUTOCONF, |
| 3255 | .procname = "autoconf", |
| 3256 | .data = &ipv6_devconf.autoconf, |
| 3257 | .maxlen = sizeof(int), |
| 3258 | .mode = 0644, |
| 3259 | .proc_handler = &proc_dointvec, |
| 3260 | }, |
| 3261 | { |
| 3262 | .ctl_name = NET_IPV6_DAD_TRANSMITS, |
| 3263 | .procname = "dad_transmits", |
| 3264 | .data = &ipv6_devconf.dad_transmits, |
| 3265 | .maxlen = sizeof(int), |
| 3266 | .mode = 0644, |
| 3267 | .proc_handler = &proc_dointvec, |
| 3268 | }, |
| 3269 | { |
| 3270 | .ctl_name = NET_IPV6_RTR_SOLICITS, |
| 3271 | .procname = "router_solicitations", |
| 3272 | .data = &ipv6_devconf.rtr_solicits, |
| 3273 | .maxlen = sizeof(int), |
| 3274 | .mode = 0644, |
| 3275 | .proc_handler = &proc_dointvec, |
| 3276 | }, |
| 3277 | { |
| 3278 | .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL, |
| 3279 | .procname = "router_solicitation_interval", |
| 3280 | .data = &ipv6_devconf.rtr_solicit_interval, |
| 3281 | .maxlen = sizeof(int), |
| 3282 | .mode = 0644, |
| 3283 | .proc_handler = &proc_dointvec_jiffies, |
| 3284 | .strategy = &sysctl_jiffies, |
| 3285 | }, |
| 3286 | { |
| 3287 | .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY, |
| 3288 | .procname = "router_solicitation_delay", |
| 3289 | .data = &ipv6_devconf.rtr_solicit_delay, |
| 3290 | .maxlen = sizeof(int), |
| 3291 | .mode = 0644, |
| 3292 | .proc_handler = &proc_dointvec_jiffies, |
| 3293 | .strategy = &sysctl_jiffies, |
| 3294 | }, |
| 3295 | { |
| 3296 | .ctl_name = NET_IPV6_FORCE_MLD_VERSION, |
| 3297 | .procname = "force_mld_version", |
| 3298 | .data = &ipv6_devconf.force_mld_version, |
| 3299 | .maxlen = sizeof(int), |
| 3300 | .mode = 0644, |
| 3301 | .proc_handler = &proc_dointvec, |
| 3302 | }, |
| 3303 | #ifdef CONFIG_IPV6_PRIVACY |
| 3304 | { |
| 3305 | .ctl_name = NET_IPV6_USE_TEMPADDR, |
| 3306 | .procname = "use_tempaddr", |
| 3307 | .data = &ipv6_devconf.use_tempaddr, |
| 3308 | .maxlen = sizeof(int), |
| 3309 | .mode = 0644, |
| 3310 | .proc_handler = &proc_dointvec, |
| 3311 | }, |
| 3312 | { |
| 3313 | .ctl_name = NET_IPV6_TEMP_VALID_LFT, |
| 3314 | .procname = "temp_valid_lft", |
| 3315 | .data = &ipv6_devconf.temp_valid_lft, |
| 3316 | .maxlen = sizeof(int), |
| 3317 | .mode = 0644, |
| 3318 | .proc_handler = &proc_dointvec, |
| 3319 | }, |
| 3320 | { |
| 3321 | .ctl_name = NET_IPV6_TEMP_PREFERED_LFT, |
| 3322 | .procname = "temp_prefered_lft", |
| 3323 | .data = &ipv6_devconf.temp_prefered_lft, |
| 3324 | .maxlen = sizeof(int), |
| 3325 | .mode = 0644, |
| 3326 | .proc_handler = &proc_dointvec, |
| 3327 | }, |
| 3328 | { |
| 3329 | .ctl_name = NET_IPV6_REGEN_MAX_RETRY, |
| 3330 | .procname = "regen_max_retry", |
| 3331 | .data = &ipv6_devconf.regen_max_retry, |
| 3332 | .maxlen = sizeof(int), |
| 3333 | .mode = 0644, |
| 3334 | .proc_handler = &proc_dointvec, |
| 3335 | }, |
| 3336 | { |
| 3337 | .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR, |
| 3338 | .procname = "max_desync_factor", |
| 3339 | .data = &ipv6_devconf.max_desync_factor, |
| 3340 | .maxlen = sizeof(int), |
| 3341 | .mode = 0644, |
| 3342 | .proc_handler = &proc_dointvec, |
| 3343 | }, |
| 3344 | #endif |
| 3345 | { |
| 3346 | .ctl_name = NET_IPV6_MAX_ADDRESSES, |
| 3347 | .procname = "max_addresses", |
| 3348 | .data = &ipv6_devconf.max_addresses, |
| 3349 | .maxlen = sizeof(int), |
| 3350 | .mode = 0644, |
| 3351 | .proc_handler = &proc_dointvec, |
| 3352 | }, |
| 3353 | { |
| 3354 | .ctl_name = 0, /* sentinel */ |
| 3355 | } |
| 3356 | }, |
| 3357 | .addrconf_dev = { |
| 3358 | { |
| 3359 | .ctl_name = NET_PROTO_CONF_ALL, |
| 3360 | .procname = "all", |
| 3361 | .mode = 0555, |
| 3362 | .child = addrconf_sysctl.addrconf_vars, |
| 3363 | }, |
| 3364 | { |
| 3365 | .ctl_name = 0, /* sentinel */ |
| 3366 | } |
| 3367 | }, |
| 3368 | .addrconf_conf_dir = { |
| 3369 | { |
| 3370 | .ctl_name = NET_IPV6_CONF, |
| 3371 | .procname = "conf", |
| 3372 | .mode = 0555, |
| 3373 | .child = addrconf_sysctl.addrconf_dev, |
| 3374 | }, |
| 3375 | { |
| 3376 | .ctl_name = 0, /* sentinel */ |
| 3377 | } |
| 3378 | }, |
| 3379 | .addrconf_proto_dir = { |
| 3380 | { |
| 3381 | .ctl_name = NET_IPV6, |
| 3382 | .procname = "ipv6", |
| 3383 | .mode = 0555, |
| 3384 | .child = addrconf_sysctl.addrconf_conf_dir, |
| 3385 | }, |
| 3386 | { |
| 3387 | .ctl_name = 0, /* sentinel */ |
| 3388 | } |
| 3389 | }, |
| 3390 | .addrconf_root_dir = { |
| 3391 | { |
| 3392 | .ctl_name = CTL_NET, |
| 3393 | .procname = "net", |
| 3394 | .mode = 0555, |
| 3395 | .child = addrconf_sysctl.addrconf_proto_dir, |
| 3396 | }, |
| 3397 | { |
| 3398 | .ctl_name = 0, /* sentinel */ |
| 3399 | } |
| 3400 | }, |
| 3401 | }; |
| 3402 | |
| 3403 | static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p) |
| 3404 | { |
| 3405 | int i; |
| 3406 | struct net_device *dev = idev ? idev->dev : NULL; |
| 3407 | struct addrconf_sysctl_table *t; |
| 3408 | char *dev_name = NULL; |
| 3409 | |
| 3410 | t = kmalloc(sizeof(*t), GFP_KERNEL); |
| 3411 | if (t == NULL) |
| 3412 | return; |
| 3413 | memcpy(t, &addrconf_sysctl, sizeof(*t)); |
| 3414 | for (i=0; t->addrconf_vars[i].data; i++) { |
| 3415 | t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf; |
| 3416 | t->addrconf_vars[i].de = NULL; |
| 3417 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
| 3418 | } |
| 3419 | if (dev) { |
| 3420 | dev_name = dev->name; |
| 3421 | t->addrconf_dev[0].ctl_name = dev->ifindex; |
| 3422 | } else { |
| 3423 | dev_name = "default"; |
| 3424 | t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT; |
| 3425 | } |
| 3426 | |
| 3427 | /* |
| 3428 | * Make a copy of dev_name, because '.procname' is regarded as const |
| 3429 | * by sysctl and we wouldn't want anyone to change it under our feet |
| 3430 | * (see SIOCSIFNAME). |
| 3431 | */ |
Paulo Marques | 543537b | 2005-06-23 00:09:02 -0700 | [diff] [blame] | 3432 | dev_name = kstrdup(dev_name, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3433 | if (!dev_name) |
| 3434 | goto free; |
| 3435 | |
| 3436 | t->addrconf_dev[0].procname = dev_name; |
| 3437 | |
| 3438 | t->addrconf_dev[0].child = t->addrconf_vars; |
| 3439 | t->addrconf_dev[0].de = NULL; |
| 3440 | t->addrconf_conf_dir[0].child = t->addrconf_dev; |
| 3441 | t->addrconf_conf_dir[0].de = NULL; |
| 3442 | t->addrconf_proto_dir[0].child = t->addrconf_conf_dir; |
| 3443 | t->addrconf_proto_dir[0].de = NULL; |
| 3444 | t->addrconf_root_dir[0].child = t->addrconf_proto_dir; |
| 3445 | t->addrconf_root_dir[0].de = NULL; |
| 3446 | |
| 3447 | t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0); |
| 3448 | if (t->sysctl_header == NULL) |
| 3449 | goto free_procname; |
| 3450 | else |
| 3451 | p->sysctl = t; |
| 3452 | return; |
| 3453 | |
| 3454 | /* error path */ |
| 3455 | free_procname: |
| 3456 | kfree(dev_name); |
| 3457 | free: |
| 3458 | kfree(t); |
| 3459 | |
| 3460 | return; |
| 3461 | } |
| 3462 | |
| 3463 | static void addrconf_sysctl_unregister(struct ipv6_devconf *p) |
| 3464 | { |
| 3465 | if (p->sysctl) { |
| 3466 | struct addrconf_sysctl_table *t = p->sysctl; |
| 3467 | p->sysctl = NULL; |
| 3468 | unregister_sysctl_table(t->sysctl_header); |
| 3469 | kfree(t->addrconf_dev[0].procname); |
| 3470 | kfree(t); |
| 3471 | } |
| 3472 | } |
| 3473 | |
| 3474 | |
| 3475 | #endif |
| 3476 | |
| 3477 | /* |
| 3478 | * Device notifier |
| 3479 | */ |
| 3480 | |
| 3481 | int register_inet6addr_notifier(struct notifier_block *nb) |
| 3482 | { |
| 3483 | return notifier_chain_register(&inet6addr_chain, nb); |
| 3484 | } |
| 3485 | |
| 3486 | int unregister_inet6addr_notifier(struct notifier_block *nb) |
| 3487 | { |
| 3488 | return notifier_chain_unregister(&inet6addr_chain,nb); |
| 3489 | } |
| 3490 | |
| 3491 | /* |
| 3492 | * Init / cleanup code |
| 3493 | */ |
| 3494 | |
| 3495 | int __init addrconf_init(void) |
| 3496 | { |
| 3497 | int err = 0; |
| 3498 | |
| 3499 | /* The addrconf netdev notifier requires that loopback_dev |
| 3500 | * has it's ipv6 private information allocated and setup |
| 3501 | * before it can bring up and give link-local addresses |
| 3502 | * to other devices which are up. |
| 3503 | * |
| 3504 | * Unfortunately, loopback_dev is not necessarily the first |
| 3505 | * entry in the global dev_base list of net devices. In fact, |
| 3506 | * it is likely to be the very last entry on that list. |
| 3507 | * So this causes the notifier registry below to try and |
| 3508 | * give link-local addresses to all devices besides loopback_dev |
| 3509 | * first, then loopback_dev, which cases all the non-loopback_dev |
| 3510 | * devices to fail to get a link-local address. |
| 3511 | * |
| 3512 | * So, as a temporary fix, allocate the ipv6 structure for |
| 3513 | * loopback_dev first by hand. |
| 3514 | * Longer term, all of the dependencies ipv6 has upon the loopback |
| 3515 | * device and it being up should be removed. |
| 3516 | */ |
| 3517 | rtnl_lock(); |
| 3518 | if (!ipv6_add_dev(&loopback_dev)) |
| 3519 | err = -ENOMEM; |
| 3520 | rtnl_unlock(); |
| 3521 | if (err) |
| 3522 | return err; |
| 3523 | |
| 3524 | register_netdevice_notifier(&ipv6_dev_notf); |
| 3525 | |
| 3526 | #ifdef CONFIG_IPV6_PRIVACY |
| 3527 | md5_tfm = crypto_alloc_tfm("md5", 0); |
| 3528 | if (unlikely(md5_tfm == NULL)) |
| 3529 | printk(KERN_WARNING |
| 3530 | "failed to load transform for md5\n"); |
| 3531 | #endif |
| 3532 | |
| 3533 | addrconf_verify(0); |
| 3534 | rtnetlink_links[PF_INET6] = inet6_rtnetlink_table; |
| 3535 | #ifdef CONFIG_SYSCTL |
| 3536 | addrconf_sysctl.sysctl_header = |
| 3537 | register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0); |
| 3538 | addrconf_sysctl_register(NULL, &ipv6_devconf_dflt); |
| 3539 | #endif |
| 3540 | |
| 3541 | return 0; |
| 3542 | } |
| 3543 | |
| 3544 | void __exit addrconf_cleanup(void) |
| 3545 | { |
| 3546 | struct net_device *dev; |
| 3547 | struct inet6_dev *idev; |
| 3548 | struct inet6_ifaddr *ifa; |
| 3549 | int i; |
| 3550 | |
| 3551 | unregister_netdevice_notifier(&ipv6_dev_notf); |
| 3552 | |
| 3553 | rtnetlink_links[PF_INET6] = NULL; |
| 3554 | #ifdef CONFIG_SYSCTL |
| 3555 | addrconf_sysctl_unregister(&ipv6_devconf_dflt); |
| 3556 | addrconf_sysctl_unregister(&ipv6_devconf); |
| 3557 | #endif |
| 3558 | |
| 3559 | rtnl_lock(); |
| 3560 | |
| 3561 | /* |
| 3562 | * clean dev list. |
| 3563 | */ |
| 3564 | |
| 3565 | for (dev=dev_base; dev; dev=dev->next) { |
| 3566 | if ((idev = __in6_dev_get(dev)) == NULL) |
| 3567 | continue; |
| 3568 | addrconf_ifdown(dev, 1); |
| 3569 | } |
| 3570 | addrconf_ifdown(&loopback_dev, 2); |
| 3571 | |
| 3572 | /* |
| 3573 | * Check hash table. |
| 3574 | */ |
| 3575 | |
| 3576 | write_lock_bh(&addrconf_hash_lock); |
| 3577 | for (i=0; i < IN6_ADDR_HSIZE; i++) { |
| 3578 | for (ifa=inet6_addr_lst[i]; ifa; ) { |
| 3579 | struct inet6_ifaddr *bifa; |
| 3580 | |
| 3581 | bifa = ifa; |
| 3582 | ifa = ifa->lst_next; |
| 3583 | printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa); |
| 3584 | /* Do not free it; something is wrong. |
| 3585 | Now we can investigate it with debugger. |
| 3586 | */ |
| 3587 | } |
| 3588 | } |
| 3589 | write_unlock_bh(&addrconf_hash_lock); |
| 3590 | |
| 3591 | del_timer(&addr_chk_timer); |
| 3592 | |
| 3593 | rtnl_unlock(); |
| 3594 | |
| 3595 | #ifdef CONFIG_IPV6_PRIVACY |
| 3596 | if (likely(md5_tfm != NULL)) { |
| 3597 | crypto_free_tfm(md5_tfm); |
| 3598 | md5_tfm = NULL; |
| 3599 | } |
| 3600 | #endif |
| 3601 | |
| 3602 | #ifdef CONFIG_PROC_FS |
| 3603 | proc_net_remove("if_inet6"); |
| 3604 | #endif |
| 3605 | } |