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net: IP_MULTICAST_IF setsockopt now recognizes struct mreq 

Until now, struct mreq has not been recognized and it was worked with
as with struct in_addr. That means imr_multiaddr was copied to
imr_address. So do recognize struct mreq here and copy that correctly.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2012-05-03 22:37:45 +00:00 committed by David S. Miller
parent 416912a129
commit 3a084ddb4b
1 changed files with 9 additions and 4 deletions
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13
net/ipv4/ip_sockglue.c
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@ -673,10 +673,15 @@ static int do_ip_setsockopt(struct sock *sk, int level,
break;
} else {
memset(&mreq, 0, sizeof(mreq));
if (optlen >= sizeof(struct in_addr) &&
copy_from_user(&mreq.imr_address, optval,
sizeof(struct in_addr)))
break;
if (optlen >= sizeof(struct ip_mreq)) {
if (copy_from_user(&mreq, optval,
sizeof(struct ip_mreq)))
break;
} else if (optlen >= sizeof(struct in_addr)) {
if (copy_from_user(&mreq.imr_address, optval,
sizeof(struct in_addr)))
break;
}
}
if (!mreq.imr_ifindex) {