addrconf.c (8f0315190dec88bf035d50e4fd1db89859b414f6) addrconf.c (4af04aba93f47699e7ac33e7cfd4da22550e6114)
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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625 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
626
627 if (ifa == NULL) {
628 ADBG(("ipv6_add_addr: malloc failed\n"));
629 err = -ENOBUFS;
630 goto out;
631 }
632
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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625 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
626
627 if (ifa == NULL) {
628 ADBG(("ipv6_add_addr: malloc failed\n"));
629 err = -ENOBUFS;
630 goto out;
631 }
632
633 rt = addrconf_dst_alloc(idev, addr, false);
633 rt = addrconf_dst_alloc(idev, addr, 0);
634 if (IS_ERR(rt)) {
635 err = PTR_ERR(rt);
636 goto out;
637 }
638
634 if (IS_ERR(rt)) {
635 err = PTR_ERR(rt);
636 goto out;
637 }
638
639 ifa->addr = *addr;
639 ipv6_addr_copy(&ifa->addr, addr);
640
641 spin_lock_init(&ifa->lock);
642 spin_lock_init(&ifa->state_lock);
643 init_timer(&ifa->timer);
644 INIT_HLIST_NODE(&ifa->addr_lst);
645 ifa->timer.data = (unsigned long) ifa;
646 ifa->scope = scope;
647 ifa->prefix_len = pfxlen;

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652
653 /*
654 * part one of RFC 4429, section 3.3
655 * We should not configure an address as
656 * optimistic if we do not yet know the link
657 * layer address of our nexhop router
658 */
659
640
641 spin_lock_init(&ifa->lock);
642 spin_lock_init(&ifa->state_lock);
643 init_timer(&ifa->timer);
644 INIT_HLIST_NODE(&ifa->addr_lst);
645 ifa->timer.data = (unsigned long) ifa;
646 ifa->scope = scope;
647 ifa->prefix_len = pfxlen;

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652
653 /*
654 * part one of RFC 4429, section 3.3
655 * We should not configure an address as
656 * optimistic if we do not yet know the link
657 * layer address of our nexhop router
658 */
659
660 if (dst_get_neighbour_noref_raw(&rt->dst) == NULL)
660 if (dst_get_neighbour_raw(&rt->dst) == NULL)
661 ifa->flags &= ~IFA_F_OPTIMISTIC;
662
663 ifa->idev = idev;
664 in6_dev_hold(idev);
665 /* For caller */
666 in6_ifa_hold(ifa);
667
668 /* Add to big hash table */

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1223try_nextdev:
1224 read_unlock_bh(&idev->lock);
1225 }
1226 rcu_read_unlock();
1227
1228 if (!hiscore->ifa)
1229 return -EADDRNOTAVAIL;
1230
661 ifa->flags &= ~IFA_F_OPTIMISTIC;
662
663 ifa->idev = idev;
664 in6_dev_hold(idev);
665 /* For caller */
666 in6_ifa_hold(ifa);
667
668 /* Add to big hash table */

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1223try_nextdev:
1224 read_unlock_bh(&idev->lock);
1225 }
1226 rcu_read_unlock();
1227
1228 if (!hiscore->ifa)
1229 return -EADDRNOTAVAIL;
1230
1231 *saddr = hiscore->ifa->addr;
1231 ipv6_addr_copy(saddr, &hiscore->ifa->addr);
1232 in6_ifa_put(hiscore->ifa);
1233 return 0;
1234}
1235EXPORT_SYMBOL(ipv6_dev_get_saddr);
1236
1237int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1238 unsigned char banned_flags)
1239{

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1244 idev = __in6_dev_get(dev);
1245 if (idev) {
1246 struct inet6_ifaddr *ifp;
1247
1248 read_lock_bh(&idev->lock);
1249 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1250 if (ifp->scope == IFA_LINK &&
1251 !(ifp->flags & banned_flags)) {
1232 in6_ifa_put(hiscore->ifa);
1233 return 0;
1234}
1235EXPORT_SYMBOL(ipv6_dev_get_saddr);
1236
1237int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1238 unsigned char banned_flags)
1239{

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1244 idev = __in6_dev_get(dev);
1245 if (idev) {
1246 struct inet6_ifaddr *ifp;
1247
1248 read_lock_bh(&idev->lock);
1249 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1250 if (ifp->scope == IFA_LINK &&
1251 !(ifp->flags & banned_flags)) {
1252 *addr = ifp->addr;
1252 ipv6_addr_copy(addr, &ifp->addr);
1253 err = 0;
1254 break;
1255 }
1256 }
1257 read_unlock_bh(&idev->lock);
1258 }
1259 rcu_read_unlock();
1260 return err;

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1695 .fc_ifindex = dev->ifindex,
1696 .fc_expires = expires,
1697 .fc_dst_len = plen,
1698 .fc_flags = RTF_UP | flags,
1699 .fc_nlinfo.nl_net = dev_net(dev),
1700 .fc_protocol = RTPROT_KERNEL,
1701 };
1702
1253 err = 0;
1254 break;
1255 }
1256 }
1257 read_unlock_bh(&idev->lock);
1258 }
1259 rcu_read_unlock();
1260 return err;

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1695 .fc_ifindex = dev->ifindex,
1696 .fc_expires = expires,
1697 .fc_dst_len = plen,
1698 .fc_flags = RTF_UP | flags,
1699 .fc_nlinfo.nl_net = dev_net(dev),
1700 .fc_protocol = RTPROT_KERNEL,
1701 };
1702
1703 cfg.fc_dst = *pfx;
1703 ipv6_addr_copy(&cfg.fc_dst, pfx);
1704
1705 /* Prevent useless cloning on PtP SIT.
1706 This thing is done here expecting that the whole
1707 class of non-broadcast devices need not cloning.
1708 */
1709#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1710 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1711 cfg.fc_flags |= RTF_NONEXTHOP;

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1800 idev = ipv6_find_idev(dev);
1801 if (!idev)
1802 return ERR_PTR(-ENOBUFS);
1803
1804 if (idev->cnf.disable_ipv6)
1805 return ERR_PTR(-EACCES);
1806
1807 /* Add default multicast route */
1704
1705 /* Prevent useless cloning on PtP SIT.
1706 This thing is done here expecting that the whole
1707 class of non-broadcast devices need not cloning.
1708 */
1709#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1710 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1711 cfg.fc_flags |= RTF_NONEXTHOP;

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1800 idev = ipv6_find_idev(dev);
1801 if (!idev)
1802 return ERR_PTR(-ENOBUFS);
1803
1804 if (idev->cnf.disable_ipv6)
1805 return ERR_PTR(-EACCES);
1806
1807 /* Add default multicast route */
1808 addrconf_add_mroute(dev);
1808 if (!(dev->flags & IFF_LOOPBACK))
1809 addrconf_add_mroute(dev);
1809
1810 /* Add link local route */
1811 addrconf_add_lroute(dev);
1812 return idev;
1813}
1814
1815void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1816{

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1811 /* Add link local route */
1812 addrconf_add_lroute(dev);
1813 return idev;
1814}
1815
1816void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
1817{

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