Commit 57de0abb authored by Jan Engelhardt's avatar Jan Engelhardt Committed by David S. Miller
Browse files

[NETFILTER]: xt_pkttype: IPv6 multicast address recognition 



Signed-off-by: default avatarJan Engelhart <jengelh@computergmbh.de>
Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 13b0e83b

net/netfilter/xt_pkttype.c

+11 −7
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
#include <linux/if_packet.h>

#include <linux/in.h>

#include <linux/ip.h>

#include <linux/ipv6.h>



#include <linux/netfilter/xt_pkttype.h>

#include <linux/netfilter/x_tables.h>
@@ -27,16 +28,19 @@ pkttype_mt(const struct sk_buff *skb, const struct net_device *in, 
           const void *matchinfo, int offset, unsigned int protoff,

           bool *hotdrop)

{

	u_int8_t type;

	const struct xt_pkttype_info *info = matchinfo;

	u_int8_t type;



	if (skb->pkt_type == PACKET_LOOPBACK)

		type = match->family == AF_INET &&

		       ipv4_is_multicast(ip_hdr(skb)->daddr)

			? PACKET_MULTICAST

			: PACKET_BROADCAST;

	else

	if (skb->pkt_type != PACKET_LOOPBACK)

		type = skb->pkt_type;

	else if (match->family == AF_INET &&

	    ipv4_is_multicast(ip_hdr(skb)->daddr))

		type = PACKET_MULTICAST;

	else if (match->family == AF_INET6 &&

	    ipv6_hdr(skb)->daddr.s6_addr[0] == 0xFF)

		type = PACKET_MULTICAST;

	else

		type = PACKET_BROADCAST;



	return (type == info->pkttype) ^ info->invert;

}