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Commit 6c223828 authored by Noriaki TAKAMIYA's avatar Noriaki TAKAMIYA Committed by David S. Miller
Browse files

[IPV6] ADDRCONF: Support get operation of single address 



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 8f27ebb9

net/ipv6/addrconf.c

+58 −1
Original line number Diff line number Diff line
@@ -3165,6 +3165,62 @@ static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) 
	return inet6_dump_addr(skb, cb, type);

}



static int inet6_rtm_getaddr(struct sk_buff *in_skb,

		struct nlmsghdr* nlh, void *arg)

{

	struct rtattr **rta = arg;

	struct ifaddrmsg *ifm = NLMSG_DATA(nlh);

	struct in6_addr *addr = NULL;

	struct net_device *dev = NULL;

	struct inet6_ifaddr *ifa;

	struct sk_buff *skb;

	int size = NLMSG_SPACE(sizeof(struct ifaddrmsg) + INET6_IFADDR_RTA_SPACE);

	int err;



	if (rta[IFA_ADDRESS-1]) {

		if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*addr))

			return -EINVAL;

		addr = RTA_DATA(rta[IFA_ADDRESS-1]);

	}

	if (rta[IFA_LOCAL-1]) {

		if (RTA_PAYLOAD(rta[IFA_LOCAL-1]) < sizeof(*addr) ||

		    (addr && memcmp(addr, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*addr))))

			return -EINVAL;

		addr = RTA_DATA(rta[IFA_LOCAL-1]);

	}

	if (addr == NULL)

		return -EINVAL;



	if (ifm->ifa_index)

		dev = __dev_get_by_index(ifm->ifa_index);



	if ((ifa = ipv6_get_ifaddr(addr, dev, 1)) == NULL)

		return -EADDRNOTAVAIL;



	if ((skb = alloc_skb(size, GFP_KERNEL)) == NULL) {

		err = -ENOBUFS;

		goto out;

	}



	NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid;

	err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).pid,

				nlh->nlmsg_seq, RTM_NEWADDR, 0);

	if (err < 0) {

		err = -EMSGSIZE;

		goto out_free;

	}



	err = netlink_unicast(rtnl, skb, NETLINK_CB(in_skb).pid, MSG_DONTWAIT);

	if (err > 0)

		err = 0;

out:

	in6_ifa_put(ifa);

	return err;

out_free:

	kfree_skb(skb);

	goto out;

}



static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)

{

	struct sk_buff *skb;
@@ -3407,7 +3463,8 @@ static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = { 
	[RTM_GETLINK - RTM_BASE] = { .dumpit	= inet6_dump_ifinfo, },

	[RTM_NEWADDR - RTM_BASE] = { .doit	= inet6_rtm_newaddr, },

	[RTM_DELADDR - RTM_BASE] = { .doit	= inet6_rtm_deladdr, },

	[RTM_GETADDR - RTM_BASE] = { .dumpit	= inet6_dump_ifaddr, },

	[RTM_GETADDR - RTM_BASE] = { .doit	= inet6_rtm_getaddr,

				     .dumpit	= inet6_dump_ifaddr, },

	[RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, },

	[RTM_GETANYCAST - RTM_BASE] = { .dumpit	= inet6_dump_ifacaddr, },

	[RTM_NEWROUTE - RTM_BASE] = { .doit	= inet6_rtm_newroute, },