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[NETFILTER]: xt_pkttype: Add explicit check for IPv4 

In the PACKET_LOOPBACK case, the skb data was always interpreted as
IPv4, but that is not valid for IPv6, obviously. Fix this by adding an
extra condition to check for AF_INET.

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jan Engelhardt 2008-01-14 23:41:34 -08:00 committed by David S. Miller
parent 17b0d7ef65
commit 13b0e83b5b
1 changed files with 2 additions and 1 deletions
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3
net/netfilter/xt_pkttype.c
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@ -31,7 +31,8 @@ pkttype_mt(const struct sk_buff *skb, const struct net_device *in,
const struct xt_pkttype_info *info = matchinfo;
if (skb->pkt_type == PACKET_LOOPBACK)
type = ipv4_is_multicast(ip_hdr(skb)->daddr)
type = match->family == AF_INET &&
ipv4_is_multicast(ip_hdr(skb)->daddr)
? PACKET_MULTICAST
: PACKET_BROADCAST;
else