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authorPablo Neira Ayuso <pablo@netfilter.org>2009-03-29 13:46:01 -0700
committerDavid S. Miller <davem@davemloft.net>2009-03-29 13:46:01 -0700
commit424b86a6bc9459a830e1e94e0e908f3ac1716b7e (patch)
treefc845e4bf6eebca37d2bbf8844d656fd3303527a /net
parent13223cb02ccfa375f2d683d08d30db5b72264f1e (diff)
downloadlinux-2.6.38-lt-ux500-424b86a6bc9459a830e1e94e0e908f3ac1716b7e.tar.gz
netfilter: xtables: fix IPv6 dependency in the cluster match
This patch fixes a dependency with IPv6: ERROR: "__ipv6_addr_type" [net/netfilter/xt_cluster.ko] undefined! This patch adds a function that checks if the higher bits of the address is 0xFF to identify a multicast address, instead of adding a dependency due to __ipv6_addr_type(). I came up with this idea after Patrick McHardy pointed possible problems with runtime module dependencies. Reported-by: Steven Noonan <steven@uplinklabs.net> Reported-by: Randy Dunlap <randy.dunlap@oracle.com> Reported-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/xt_cluster.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/net/netfilter/xt_cluster.c b/net/netfilter/xt_cluster.c
index ad5bd890e4e..6c4847662b8 100644
--- a/net/netfilter/xt_cluster.c
+++ b/net/netfilter/xt_cluster.c
@@ -58,6 +58,13 @@ xt_cluster_hash(const struct nf_conn *ct,
}
static inline bool
+xt_cluster_ipv6_is_multicast(const struct in6_addr *addr)
+{
+ __be32 st = addr->s6_addr32[0];
+ return ((st & htonl(0xFF000000)) == htonl(0xFF000000));
+}
+
+static inline bool
xt_cluster_is_multicast_addr(const struct sk_buff *skb, u_int8_t family)
{
bool is_multicast = false;
@@ -67,8 +74,8 @@ xt_cluster_is_multicast_addr(const struct sk_buff *skb, u_int8_t family)
is_multicast = ipv4_is_multicast(ip_hdr(skb)->daddr);
break;
case NFPROTO_IPV6:
- is_multicast = ipv6_addr_type(&ipv6_hdr(skb)->daddr) &
- IPV6_ADDR_MULTICAST;
+ is_multicast =
+ xt_cluster_ipv6_is_multicast(&ipv6_hdr(skb)->daddr);
break;
default:
WARN_ON(1);