[NETFILTER]: ip6_tables: support MH match

This introduces match for Mobility Header (MH) described by Mobile IPv6
specification (RFC3775). User can specify the MH type or its range to be
matched.

Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: Yasuyuki Kozakai <kozakai@linux-ipv6.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/netfilter_ipv6/ip6t_mh.h b/include/linux/netfilter_ipv6/ip6t_mh.h
new file mode 100644
index 000000000000..b9ca9a5f74d0
--- /dev/null
+++ b/include/linux/netfilter_ipv6/ip6t_mh.h
@@ -0,0 +1,15 @@
+#ifndef _IP6T_MH_H
+#define _IP6T_MH_H
+
+/* MH matching stuff */
+struct ip6t_mh
+{
+        u_int8_t types[2];      /* MH type range */
+        u_int8_t invflags;      /* Inverse flags */
+};
+
+/* Values for "invflags" field in struct ip6t_mh. */
+#define IP6T_MH_INV_TYPE        0x01    /* Invert the sense of type. */
+#define IP6T_MH_INV_MASK        0x01    /* All possible flags. */
+
+#endif /*_IP6T_MH_H*/