diff options
| -rw-r--r-- | net/ipv6/addrconf.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 3ef3fe20283..8ea1e36bf8e 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -2895,6 +2895,55 @@ inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) } static int +inet6_addr_modify(int ifindex, struct in6_addr *pfx, + __u32 prefered_lft, __u32 valid_lft) +{ + struct inet6_ifaddr *ifp = NULL; + struct net_device *dev; + int ifa_flags = 0; + + if ((dev = __dev_get_by_index(ifindex)) == NULL) + return -ENODEV; + + if (!(dev->flags&IFF_UP)) + return -ENETDOWN; + + if (!valid_lft || (prefered_lft > valid_lft)) + return -EINVAL; + + ifp = ipv6_get_ifaddr(pfx, dev, 1); + if (ifp == NULL) + return -ENOENT; + + if (valid_lft == INFINITY_LIFE_TIME) + ifa_flags = IFA_F_PERMANENT; + else if (valid_lft >= 0x7FFFFFFF/HZ) + valid_lft = 0x7FFFFFFF/HZ; + + if (prefered_lft == 0) + ifa_flags = IFA_F_DEPRECATED; + else if ((prefered_lft >= 0x7FFFFFFF/HZ) && + (prefered_lft != INFINITY_LIFE_TIME)) + prefered_lft = 0x7FFFFFFF/HZ; + + spin_lock_bh(&ifp->lock); + ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED|IFA_F_PERMANENT)) | ifa_flags; + + ifp->tstamp = jiffies; + ifp->valid_lft = valid_lft; + ifp->prefered_lft = prefered_lft; + + spin_unlock_bh(&ifp->lock); + if (!(ifp->flags&IFA_F_TENTATIVE)) + ipv6_ifa_notify(0, ifp); + in6_ifa_put(ifp); + + addrconf_verify(0); + + return 0; +} + +static int inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) { struct rtattr **rta = arg; @@ -2926,6 +2975,14 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) prefered_lft = ci->ifa_prefered; } + if (nlh->nlmsg_flags & NLM_F_REPLACE) { + int ret; + ret = inet6_addr_modify(ifm->ifa_index, pfx, + prefered_lft, valid_lft); + if (ret == 0 || !(nlh->nlmsg_flags & NLM_F_CREATE)) + return ret; + } + return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen, prefered_lft, valid_lft); |