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ipv6: Check IPV6_MULTICAST_LOOP option value.

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Only 0 and 1 are valid for IPV6_MULTICAST_LOOP socket option,
and we should return an error of EINVAL otherwise, per RFC3493.

Based on patch from Shan Wei <shanwei@cn.fujitsu.com>.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
This commit is contained in:
YOSHIFUJI Hideaki 2008-06-12 03:14:51 +09:00
parent e8766fc86b
commit 28d4488216
1 changed files with 2 additions and 0 deletions
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2
net/ipv6/ipv6_sockglue.c
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@ -458,6 +458,8 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
case IPV6_MULTICAST_LOOP:
if (optlen < sizeof(int))
goto e_inval;
if (val != valbool)
goto e_inval;
np->mc_loop = valbool;
retv = 0;
break;