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| author | David S. Miller <davem@davemloft.net> | 2008-04-08 02:33:36 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-04-08 02:33:36 -0700 |
| commit | 8eefca4888c986d993b2571eb31f0397a5d0a178 (patch) | |
| tree | adc659aba0eaaaaa3d33db20d7c759dfc5f0669b /net/ipv6/addrconf.c | |
| parent | 549e028d012fab01e5726943d4afecd0c33d64e6 (diff) | |
| parent | de357cc01334a468e4d5b7ba66a17b0d3ca9d63e (diff) | |
Merge branch 'net-2.6.26-isatap-20080403' of git://git.linux-ipv6.org/gitroot/yoshfuji/linux-2.6-dev
Diffstat (limited to 'net/ipv6/addrconf.c')
| -rw-r--r-- | net/ipv6/addrconf.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index dbc51af6901..924158393d0 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -1265,6 +1265,31 @@ int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, return ifp != NULL; } +int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev) +{ + struct inet6_dev *idev; + struct inet6_ifaddr *ifa; + int onlink; + + onlink = 0; + rcu_read_lock(); + idev = __in6_dev_get(dev); + if (idev) { + read_lock_bh(&idev->lock); + for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) { + onlink = ipv6_prefix_equal(addr, &ifa->addr, + ifa->prefix_len); + if (onlink) + break; + } + read_unlock_bh(&idev->lock); + } + rcu_read_unlock(); + return onlink; +} + +EXPORT_SYMBOL(ipv6_chk_prefix); + struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, struct in6_addr *addr, struct net_device *dev, int strict) { |