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[IPV6] ADDRCONF: Allow user-space to specify address lifetime

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Based on MIPL2 kernel patch.

Signed-off-by: Noriaki TAKAMIYA <takamiya@po.ntts.co.jp>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
This commit is contained in:
Noriaki TAKAMIYA 2006-07-28 18:12:10 +09:00 committed by David S. Miller
parent 643162258e
commit 0778769d39
1 changed files with 42 additions and 4 deletions
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46
net/ipv6/addrconf.c
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@ -1869,15 +1869,21 @@ err_exit:
/*
* Manual configuration of address on an interface
*/
static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen)
static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen,
__u32 prefered_lft, __u32 valid_lft)
{
struct inet6_ifaddr *ifp;
struct inet6_dev *idev;
struct net_device *dev;
__u8 ifa_flags = 0;
int scope;
ASSERT_RTNL();
/* check the lifetime */
if (!valid_lft || prefered_lft > valid_lft)
return -EINVAL;
if ((dev = __dev_get_by_index(ifindex)) == NULL)
return -ENODEV;
@ -1889,10 +1895,29 @@ static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen)
scope = ipv6_addr_scope(pfx);
ifp = ipv6_add_addr(idev, pfx, plen, scope, IFA_F_PERMANENT);
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;
ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
if (!IS_ERR(ifp)) {
spin_lock(&ifp->lock);
ifp->valid_lft = valid_lft;
ifp->prefered_lft = prefered_lft;
ifp->tstamp = jiffies;
spin_unlock(&ifp->lock);
addrconf_dad_start(ifp, 0);
in6_ifa_put(ifp);
addrconf_verify(0);
return 0;
}
@ -1945,7 +1970,8 @@ int addrconf_add_ifaddr(void __user *arg)
return -EFAULT;
rtnl_lock();
err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen,
INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
rtnl_unlock();
return err;
}
@ -2870,6 +2896,7 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
struct rtattr **rta = arg;
struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
struct in6_addr *pfx;
__u32 valid_lft = INFINITY_LIFE_TIME, prefered_lft = INFINITY_LIFE_TIME;
pfx = NULL;
if (rta[IFA_ADDRESS-1]) {
@ -2886,7 +2913,18 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
if (pfx == NULL)
return -EINVAL;
return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
if (rta[IFA_CACHEINFO-1]) {
struct ifa_cacheinfo *ci;
if (RTA_PAYLOAD(rta[IFA_CACHEINFO-1]) < sizeof(*ci))
return -EINVAL;
ci = RTA_DATA(rta[IFA_CACHEINFO-1]);
valid_lft = ci->ifa_valid;
prefered_lft = ci->ifa_prefered;
}
return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
prefered_lft, valid_lft);
}
/* Maximum length of ifa_cacheinfo attributes */