openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

[NETFILTER]: xt_pkttype: IPv6 multicast address recognition 

Signed-off-by: Jan Engelhart <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 23:41:50 -08:00 committed by David S. Miller
parent 13b0e83b5b
commit 57de0abbff
1 changed files with 11 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
net/netfilter/xt_pkttype.c
View File

@ -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;
}