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ipv6: Implement IPV6_UNICAST_IF socket option.

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The IPV6_UNICAST_IF feature is the IPv6 compliment to IP_UNICAST_IF.

Signed-off-by: Erich E. Hoover <ehoover@mines.edu>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Erich E. Hoover
2012-02-08 09:11:08 +00:00
committed by David S. Miller
parent 76e21053b5
commit c4062dfc42
6 changed files with 44 additions and 1 deletions
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34
net/ipv6/ipv6_sockglue.c
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@ -516,6 +516,36 @@ done:
retv = 0;
break;
case IPV6_UNICAST_IF:
{
struct net_device *dev = NULL;
int ifindex;
if (optlen != sizeof(int))
goto e_inval;
ifindex = (__force int)ntohl((__force __be32)val);
if (ifindex == 0) {
np->ucast_oif = 0;
retv = 0;
break;
}
dev = dev_get_by_index(net, ifindex);
retv = -EADDRNOTAVAIL;
if (!dev)
break;
dev_put(dev);
retv = -EINVAL;
if (sk->sk_bound_dev_if)
break;
np->ucast_oif = ifindex;
retv = 0;
break;
}
case IPV6_MULTICAST_IF:
if (sk->sk_type == SOCK_STREAM)
break;
@ -1160,6 +1190,10 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
val = np->mcast_oif;
break;
case IPV6_UNICAST_IF:
val = (__force int)htonl((__u32) np->ucast_oif);
break;
case IPV6_MTU_DISCOVER:
val = np->pmtudisc;
break;