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netfilter: pkttype: unnecessary to check ipv6 multicast address 

Since there's no broadcast address in IPV6, so in ipv6 family, the
PACKET_LOOPBACK must be multicast packets, there's no need to check
it again.

Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
zero-colors
Liping Zhang 2017-01-07 21:33:54 +08:00 committed by Pablo Neira Ayuso
parent ec23189049
commit 9a6d876262
2 changed files with 2 additions and 6 deletions
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5
net/netfilter/nft_meta.c
View File

@ -154,10 +154,7 @@ void nft_meta_get_eval(const struct nft_expr *expr,
*dest = PACKET_BROADCAST;
break;
case NFPROTO_IPV6:
if (ipv6_hdr(skb)->daddr.s6_addr[0] == 0xFF)
*dest = PACKET_MULTICAST;
else
*dest = PACKET_BROADCAST;
*dest = PACKET_MULTICAST;
break;
default:
WARN_ON(1);

3
net/netfilter/xt_pkttype.c
View File

@ -33,8 +33,7 @@ pkttype_mt(const struct sk_buff *skb, struct xt_action_param *par)
else if (xt_family(par) == NFPROTO_IPV4 &&
ipv4_is_multicast(ip_hdr(skb)->daddr))
type = PACKET_MULTICAST;
else if (xt_family(par) == NFPROTO_IPV6 &&
ipv6_hdr(skb)->daddr.s6_addr[0] == 0xFF)
else if (xt_family(par) == NFPROTO_IPV6)
type = PACKET_MULTICAST;
else
type = PACKET_BROADCAST;