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authorErich E. Hoover <ehoover@mines.edu>2012-02-08 09:11:08 +0000
committerDavid S. Miller <davem@davemloft.net>2012-02-08 15:52:45 -0500
commitc4062dfc425e94290ac427a98d6b4721dd2bc91f (patch)
tree30180df3e11ded7ed8ea2c3c4525092d0711f1af /net/ipv6/ipv6_sockglue.c
parent76e21053b5bf33a07c76f99d27a74238310e3c71 (diff)
downloadop-kernel-dev-c4062dfc425e94290ac427a98d6b4721dd2bc91f.zip
op-kernel-dev-c4062dfc425e94290ac427a98d6b4721dd2bc91f.tar.gz
ipv6: Implement IPV6_UNICAST_IF socket option.
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>
Diffstat (limited to 'net/ipv6/ipv6_sockglue.c')
-rw-r--r--net/ipv6/ipv6_sockglue.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 18a2719..6d6b65f 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -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;
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