diff options
| author |   Hannes Frederic Sowa <hannes@stressinduktion.org> | 2015-03-23 23:36:02 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-03-23 22:12:09 -0400 |
| commit | 64236f3f3d742469e4027b83a9515e84e9ab21b4 (patch) | |
| tree | 3338532cb9cc0d047ff38b0c11bdd09119f44336 | |
| parent | ipv6: generation of stable privacy addresses for link-local and autoconf (diff) | |
| download | linux-dev-64236f3f3d742469e4027b83a9515e84e9ab21b4.tar.xz linux-dev-64236f3f3d742469e4027b83a9515e84e9ab21b4.zip | |
ipv6: introduce IFA_F_STABLE_PRIVACY flag
We need to mark appropriate addresses so we can do retries in case their
DAD failed.
Cc: Erik Kline <ek@google.com>
Cc: Fernando Gont <fgont@si6networks.com>
Cc: Lorenzo Colitti <lorenzo@google.com>
Cc: YOSHIFUJI Hideaki/吉藤英明 <hideaki.yoshifuji@miraclelinux.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/uapi/linux/if_addr.h | 1 | ||||
| -rw-r--r-- | net/ipv6/addrconf.c | 14 |
2 files changed, 9 insertions, 6 deletions
diff --git a/include/uapi/linux/if_addr.h b/include/uapi/linux/if_addr.h index 40fdfea39714..4318ab1635ce 100644 --- a/include/uapi/linux/if_addr.h +++ b/include/uapi/linux/if_addr.h @@ -51,6 +51,7 @@ enum { #define IFA_F_MANAGETEMPADDR 0x100 #define IFA_F_NOPREFIXROUTE 0x200 #define IFA_F_MCAUTOJOIN 0x400 +#define IFA_F_STABLE_PRIVACY 0x800 struct ifa_cacheinfo { __u32 ifa_prefered; diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 6813268ce8b8..c2357b6f62dd 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -2199,6 +2199,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) __u32 valid_lft; __u32 prefered_lft; int addr_type; + u32 addr_flags = 0; struct inet6_dev *in6_dev; struct net *net = dev_net(dev); @@ -2309,6 +2310,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) IN6_ADDR_GEN_MODE_STABLE_PRIVACY && !ipv6_generate_stable_address(&addr, 0, in6_dev)) { + addr_flags |= IFA_F_STABLE_PRIVACY; goto ok; } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { @@ -2328,7 +2330,6 @@ ok: if (ifp == NULL && valid_lft) { int max_addresses = in6_dev->cnf.max_addresses; - u32 addr_flags = 0; #ifdef CONFIG_IPV6_OPTIMISTIC_DAD if (in6_dev->cnf.optimistic_dad && @@ -2807,10 +2808,11 @@ static void init_loopback(struct net_device *dev) } } -static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr) +static void addrconf_add_linklocal(struct inet6_dev *idev, + const struct in6_addr *addr, u32 flags) { struct inet6_ifaddr *ifp; - u32 addr_flags = IFA_F_PERMANENT; + u32 addr_flags = flags | IFA_F_PERMANENT; #ifdef CONFIG_IPV6_OPTIMISTIC_DAD if (idev->cnf.optimistic_dad && @@ -2818,7 +2820,6 @@ static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr addr_flags |= IFA_F_OPTIMISTIC; #endif - ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); if (!IS_ERR(ifp)) { @@ -2916,7 +2917,8 @@ static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY) { if (!ipv6_generate_stable_address(&addr, 0, idev)) - addrconf_add_linklocal(idev, &addr); + addrconf_add_linklocal(idev, &addr, + IFA_F_STABLE_PRIVACY); else if (prefix_route) addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); } else if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64) { @@ -2925,7 +2927,7 @@ static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) * couldn't generate one. */ if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0) - addrconf_add_linklocal(idev, &addr); + addrconf_add_linklocal(idev, &addr, 0); else if (prefix_route) addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); } |