From c4062dfc425e94290ac427a98d6b4721dd2bc91f Mon Sep 17 00:00:00 2001 From: "Erich E. Hoover" Date: Wed, 8 Feb 2012 09:11:08 +0000 Subject: 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 Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv6/ipv6_sockglue.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'net/ipv6/ipv6_sockglue.c') diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index 18a2719003c3..6d6b65fdaa1a 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; -- cgit v1.2.3