addrconf.c (275d38585c742acdd6b8ab20f2588552f04c5d31) addrconf.c (76f793e3a47139d340185cbc1a314740c09b13d3)
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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819 in6_ifa_put(ifp);
820}
821
822#ifdef CONFIG_IPV6_PRIVACY
823static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
824{
825 struct inet6_dev *idev = ifp->idev;
826 struct in6_addr addr, *tmpaddr;
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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819 in6_ifa_put(ifp);
820}
821
822#ifdef CONFIG_IPV6_PRIVACY
823static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
824{
825 struct inet6_dev *idev = ifp->idev;
826 struct in6_addr addr, *tmpaddr;
827 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp, age;
827 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age;
828 unsigned long regen_advance;
829 int tmp_plen;
830 int ret = 0;
831 int max_addresses;
832 u32 addr_flags;
828 unsigned long regen_advance;
829 int tmp_plen;
830 int ret = 0;
831 int max_addresses;
832 u32 addr_flags;
833 unsigned long now = jiffies;
833
834 write_lock(&idev->lock);
835 if (ift) {
836 spin_lock_bh(&ift->lock);
837 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
838 spin_unlock_bh(&ift->lock);
839 tmpaddr = &addr;
840 } else {

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869 printk(KERN_WARNING
870 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
871 in6_ifa_put(ifp);
872 in6_dev_put(idev);
873 ret = -1;
874 goto out;
875 }
876 memcpy(&addr.s6_addr[8], idev->rndid, 8);
834
835 write_lock(&idev->lock);
836 if (ift) {
837 spin_lock_bh(&ift->lock);
838 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
839 spin_unlock_bh(&ift->lock);
840 tmpaddr = &addr;
841 } else {

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870 printk(KERN_WARNING
871 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
872 in6_ifa_put(ifp);
873 in6_dev_put(idev);
874 ret = -1;
875 goto out;
876 }
877 memcpy(&addr.s6_addr[8], idev->rndid, 8);
877 age = (jiffies - ifp->tstamp) / HZ;
878 age = (now - ifp->tstamp) / HZ;
878 tmp_valid_lft = min_t(__u32,
879 ifp->valid_lft,
880 idev->cnf.temp_valid_lft + age);
881 tmp_prefered_lft = min_t(__u32,
882 ifp->prefered_lft,
883 idev->cnf.temp_prefered_lft + age -
884 idev->cnf.max_desync_factor);
885 tmp_plen = ifp->prefix_len;
886 max_addresses = idev->cnf.max_addresses;
879 tmp_valid_lft = min_t(__u32,
880 ifp->valid_lft,
881 idev->cnf.temp_valid_lft + age);
882 tmp_prefered_lft = min_t(__u32,
883 ifp->prefered_lft,
884 idev->cnf.temp_prefered_lft + age -
885 idev->cnf.max_desync_factor);
886 tmp_plen = ifp->prefix_len;
887 max_addresses = idev->cnf.max_addresses;
887 tmp_cstamp = ifp->cstamp;
888 tmp_tstamp = ifp->tstamp;
889 spin_unlock_bh(&ifp->lock);
890
891 regen_advance = idev->cnf.regen_max_retry *
892 idev->cnf.dad_transmits *
893 idev->nd_parms->retrans_time / HZ;
894 write_unlock(&idev->lock);
895

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924 write_lock(&idev->lock);
925 goto retry;
926 }
927
928 spin_lock_bh(&ift->lock);
929 ift->ifpub = ifp;
930 ift->valid_lft = tmp_valid_lft;
931 ift->prefered_lft = tmp_prefered_lft;
888 tmp_tstamp = ifp->tstamp;
889 spin_unlock_bh(&ifp->lock);
890
891 regen_advance = idev->cnf.regen_max_retry *
892 idev->cnf.dad_transmits *
893 idev->nd_parms->retrans_time / HZ;
894 write_unlock(&idev->lock);
895

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924 write_lock(&idev->lock);
925 goto retry;
926 }
927
928 spin_lock_bh(&ift->lock);
929 ift->ifpub = ifp;
930 ift->valid_lft = tmp_valid_lft;
931 ift->prefered_lft = tmp_prefered_lft;
932 ift->cstamp = tmp_cstamp;
932 ift->cstamp = now;
933 ift->tstamp = tmp_tstamp;
934 spin_unlock_bh(&ift->lock);
935
936 addrconf_dad_start(ift, 0);
937 in6_ifa_put(ift);
938 in6_dev_put(idev);
939out:
940 return ret;

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1994 if (!(flags&IFA_F_TENTATIVE))
1995 ipv6_ifa_notify(0, ifp);
1996 } else
1997 spin_unlock(&ifp->lock);
1998
1999#ifdef CONFIG_IPV6_PRIVACY
2000 read_lock_bh(&in6_dev->lock);
2001 /* update all temporary addresses in the list */
933 ift->tstamp = tmp_tstamp;
934 spin_unlock_bh(&ift->lock);
935
936 addrconf_dad_start(ift, 0);
937 in6_ifa_put(ift);
938 in6_dev_put(idev);
939out:
940 return ret;

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1994 if (!(flags&IFA_F_TENTATIVE))
1995 ipv6_ifa_notify(0, ifp);
1996 } else
1997 spin_unlock(&ifp->lock);
1998
1999#ifdef CONFIG_IPV6_PRIVACY
2000 read_lock_bh(&in6_dev->lock);
2001 /* update all temporary addresses in the list */
2002 list_for_each_entry(ift, &in6_dev->tempaddr_list, tmp_list) {
2003 /*
2004 * When adjusting the lifetimes of an existing
2005 * temporary address, only lower the lifetimes.
2006 * Implementations must not increase the
2007 * lifetimes of an existing temporary address
2008 * when processing a Prefix Information Option.
2009 */
2002 list_for_each_entry(ift, &in6_dev->tempaddr_list,
2003 tmp_list) {
2004 int age, max_valid, max_prefered;
2005
2010 if (ifp != ift->ifpub)
2011 continue;
2012
2006 if (ifp != ift->ifpub)
2007 continue;
2008
2009 /*
2010 * RFC 4941 section 3.3:
2011 * If a received option will extend the lifetime
2012 * of a public address, the lifetimes of
2013 * temporary addresses should be extended,
2014 * subject to the overall constraint that no
2015 * temporary addresses should ever remain
2016 * "valid" or "preferred" for a time longer than
2017 * (TEMP_VALID_LIFETIME) or
2018 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
2019 * respectively.
2020 */
2021 age = (now - ift->cstamp) / HZ;
2022 max_valid = in6_dev->cnf.temp_valid_lft - age;
2023 if (max_valid < 0)
2024 max_valid = 0;
2025
2026 max_prefered = in6_dev->cnf.temp_prefered_lft -
2027 in6_dev->cnf.max_desync_factor -
2028 age;
2029 if (max_prefered < 0)
2030 max_prefered = 0;
2031
2032 if (valid_lft > max_valid)
2033 valid_lft = max_valid;
2034
2035 if (prefered_lft > max_prefered)
2036 prefered_lft = max_prefered;
2037
2013 spin_lock(&ift->lock);
2014 flags = ift->flags;
2038 spin_lock(&ift->lock);
2039 flags = ift->flags;
2015 if (ift->valid_lft > valid_lft &&
2016 ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
2017 ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
2018 if (ift->prefered_lft > prefered_lft &&
2019 ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
2020 ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
2040 ift->valid_lft = valid_lft;
2041 ift->prefered_lft = prefered_lft;
2042 ift->tstamp = now;
2043 if (prefered_lft > 0)
2044 ift->flags &= ~IFA_F_DEPRECATED;
2045
2021 spin_unlock(&ift->lock);
2022 if (!(flags&IFA_F_TENTATIVE))
2023 ipv6_ifa_notify(0, ift);
2024 }
2025
2026 if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) {
2027 /*
2046 spin_unlock(&ift->lock);
2047 if (!(flags&IFA_F_TENTATIVE))
2048 ipv6_ifa_notify(0, ift);
2049 }
2050
2051 if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) {
2052 /*
2028 * When a new public address is created as described in [ADDRCONF],
2029 * also create a new temporary address. Also create a temporary
2030 * address if it's enabled but no temporary address currently exists.
2053 * When a new public address is created as
2054 * described in [ADDRCONF], also create a new
2055 * temporary address. Also create a temporary
2056 * address if it's enabled but no temporary
2057 * address currently exists.
2031 */
2032 read_unlock_bh(&in6_dev->lock);
2033 ipv6_create_tempaddr(ifp, NULL);
2034 } else {
2035 read_unlock_bh(&in6_dev->lock);
2036 }
2037#endif
2038 in6_ifa_put(ifp);

--- 2757 unchanged lines hidden --- 		2058 */
2059 read_unlock_bh(&in6_dev->lock);
2060 ipv6_create_tempaddr(ifp, NULL);
2061 } else {
2062 read_unlock_bh(&in6_dev->lock);
2063 }
2064#endif
2065 in6_ifa_put(ifp);

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