addrconf.c (9acd9f3ae92d0dc0ca7504fb48c1040e8bbc39fe) addrconf.c (f3ee4010e84452aa133e5163e6cfabc52b194e94)
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 *

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217#endif
218 .proxy_ndp = 0,
219 .accept_source_route = 0, /* we do not accept RH0 by default. */
220};
221
222/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
223const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
224const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
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 *

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217#endif
218 .proxy_ndp = 0,
219 .accept_source_route = 0, /* we do not accept RH0 by default. */
220};
221
222/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
223const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
224const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
225const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
226const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
225
226/* Check if a valid qdisc is available */
227static inline int addrconf_qdisc_ok(struct net_device *dev)
228{
229 return (dev->qdisc != &noop_qdisc);
230}
231
232static void addrconf_del_timer(struct inet6_ifaddr *ifp)

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316 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
317}
318
319EXPORT_SYMBOL(in6_dev_finish_destroy);
320
321static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
322{
323 struct inet6_dev *ndev;
227
228/* Check if a valid qdisc is available */
229static inline int addrconf_qdisc_ok(struct net_device *dev)
230{
231 return (dev->qdisc != &noop_qdisc);
232}
233
234static void addrconf_del_timer(struct inet6_ifaddr *ifp)

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318 call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
319}
320
321EXPORT_SYMBOL(in6_dev_finish_destroy);
322
323static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
324{
325 struct inet6_dev *ndev;
324 struct in6_addr maddr;
325
326 ASSERT_RTNL();
327
328 if (dev->mtu < IPV6_MIN_MTU)
329 return NULL;
330
331 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
332

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401
402 ipv6_mc_init_dev(ndev);
403 ndev->tstamp = jiffies;
404 addrconf_sysctl_register(ndev);
405 /* protected by rtnl_lock */
406 rcu_assign_pointer(dev->ip6_ptr, ndev);
407
408 /* Join all-node multicast group */
326
327 ASSERT_RTNL();
328
329 if (dev->mtu < IPV6_MIN_MTU)
330 return NULL;
331
332 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
333

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402
403 ipv6_mc_init_dev(ndev);
404 ndev->tstamp = jiffies;
405 addrconf_sysctl_register(ndev);
406 /* protected by rtnl_lock */
407 rcu_assign_pointer(dev->ip6_ptr, ndev);
408
409 /* Join all-node multicast group */
409 ipv6_addr_all_nodes(&maddr);
410 ipv6_dev_mc_inc(dev, &maddr);
410 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
411
412 return ndev;
413}
414
415struct inet6_dev * ipv6_find_idev(struct net_device *dev)
416{
417 struct inet6_dev *idev;
418

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428 return idev;
429}
430
431#ifdef CONFIG_SYSCTL
432static void dev_forward_change(struct inet6_dev *idev)
433{
434 struct net_device *dev;
435 struct inet6_ifaddr *ifa;
411
412 return ndev;
413}
414
415struct inet6_dev * ipv6_find_idev(struct net_device *dev)
416{
417 struct inet6_dev *idev;
418

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428 return idev;
429}
430
431#ifdef CONFIG_SYSCTL
432static void dev_forward_change(struct inet6_dev *idev)
433{
434 struct net_device *dev;
435 struct inet6_ifaddr *ifa;
436 struct in6_addr addr;
437
438 if (!idev)
439 return;
440 dev = idev->dev;
441 if (dev && (dev->flags & IFF_MULTICAST)) {
436
437 if (!idev)
438 return;
439 dev = idev->dev;
440 if (dev && (dev->flags & IFF_MULTICAST)) {
442 ipv6_addr_all_routers(&addr);
443
444 if (idev->cnf.forwarding)
441 if (idev->cnf.forwarding)
445 ipv6_dev_mc_inc(dev, &addr);
442 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
446 else
443 else
447 ipv6_dev_mc_dec(dev, &addr);
444 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
448 }
449 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
450 if (ifa->flags&IFA_F_TENTATIVE)
451 continue;
452 if (idev->cnf.forwarding)
453 addrconf_join_anycast(ifa);
454 else
455 addrconf_leave_anycast(ifa);

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2649 * Announcement received after solicitation
2650 * was sent
2651 */
2652 goto out;
2653 }
2654
2655 spin_lock(&ifp->lock);
2656 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
445 }
446 for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
447 if (ifa->flags&IFA_F_TENTATIVE)
448 continue;
449 if (idev->cnf.forwarding)
450 addrconf_join_anycast(ifa);
451 else
452 addrconf_leave_anycast(ifa);

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2646 * Announcement received after solicitation
2647 * was sent
2648 */
2649 goto out;
2650 }
2651
2652 spin_lock(&ifp->lock);
2653 if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
2657 struct in6_addr all_routers;
2658
2659 /* The wait after the last probe can be shorter */
2660 addrconf_mod_timer(ifp, AC_RS,
2661 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2662 ifp->idev->cnf.rtr_solicit_delay :
2663 ifp->idev->cnf.rtr_solicit_interval);
2664 spin_unlock(&ifp->lock);
2665
2654 /* The wait after the last probe can be shorter */
2655 addrconf_mod_timer(ifp, AC_RS,
2656 (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
2657 ifp->idev->cnf.rtr_solicit_delay :
2658 ifp->idev->cnf.rtr_solicit_interval);
2659 spin_unlock(&ifp->lock);
2660
2666 ipv6_addr_all_routers(&all_routers);
2667
2668 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2661 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
2669 } else {
2670 spin_unlock(&ifp->lock);
2671 /*
2672 * Note: we do not support deprecated "all on-link"
2673 * assumption any longer.
2674 */
2675 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2676 ifp->idev->dev->name);

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2801 /* If added prefix is link local and forwarding is off,
2802 start sending router solicitations.
2803 */
2804
2805 if (ifp->idev->cnf.forwarding == 0 &&
2806 ifp->idev->cnf.rtr_solicits > 0 &&
2807 (dev->flags&IFF_LOOPBACK) == 0 &&
2808 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2662 } else {
2663 spin_unlock(&ifp->lock);
2664 /*
2665 * Note: we do not support deprecated "all on-link"
2666 * assumption any longer.
2667 */
2668 printk(KERN_DEBUG "%s: no IPv6 routers present\n",
2669 ifp->idev->dev->name);

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2794 /* If added prefix is link local and forwarding is off,
2795 start sending router solicitations.
2796 */
2797
2798 if (ifp->idev->cnf.forwarding == 0 &&
2799 ifp->idev->cnf.rtr_solicits > 0 &&
2800 (dev->flags&IFF_LOOPBACK) == 0 &&
2801 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
2809 struct in6_addr all_routers;
2810
2811 ipv6_addr_all_routers(&all_routers);
2812
2813 /*
2814 * If a host as already performed a random delay
2815 * [...] as part of DAD [...] there is no need
2816 * to delay again before sending the first RS
2817 */
2802 /*
2803 * If a host as already performed a random delay
2804 * [...] as part of DAD [...] there is no need
2805 * to delay again before sending the first RS
2806 */
2818 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
2807 ndisc_send_rs(ifp->idev->dev, &ifp->addr, &in6addr_linklocal_allrouters);
2819
2820 spin_lock_bh(&ifp->lock);
2821 ifp->probes = 1;
2822 ifp->idev->if_flags |= IF_RS_SENT;
2823 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2824 spin_unlock_bh(&ifp->lock);
2825 }
2826}

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2809 spin_lock_bh(&ifp->lock);
2810 ifp->probes = 1;
2811 ifp->idev->if_flags |= IF_RS_SENT;
2812 addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
2813 spin_unlock_bh(&ifp->lock);
2814 }
2815}

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