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Commit 0778769d authored by Noriaki TAKAMIYA's avatar Noriaki TAKAMIYA Committed by David S. Miller
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[IPV6] ADDRCONF: Allow user-space to specify address lifetime 



Based on MIPL2 kernel patch.

Signed-off-by: default avatarNoriaki TAKAMIYA <takamiya@po.ntts.co.jp>
Signed-off-by: default avatarYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
parent 64316225

net/ipv6/addrconf.c

+42 −4
Original line number Diff line number Diff line
@@ -1869,15 +1869,21 @@ int addrconf_set_dstaddr(void __user *arg) 
/*

 *	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 */