[NETFILTER] x_tables: Abstraction layer for {ip,ip6,arp}_tables

This monster-patch tries to do the best job for unifying the data
structures and backend interfaces for the three evil clones ip_tables,
ip6_tables and arp_tables.  In an ideal world we would never have
allowed this kind of copy+paste programming... but well, our world
isn't (yet?) ideal.

o introduce a new x_tables module
o {ip,arp,ip6}_tables depend on this x_tables module
o registration functions for tables, matches and targets are only
  wrappers around x_tables provided functions
o all matches/targets that are used from ip_tables and ip6_tables
  are now implemented as xt_FOOBAR.c files and provide module aliases
  to ipt_FOOBAR and ip6t_FOOBAR
o header files for xt_matches are in include/linux/netfilter/,
  include/linux/netfilter_{ipv4,ipv6} contains compatibility wrappers
  around the xt_FOOBAR.h headers

Based on this patchset we're going to further unify the code,
gradually getting rid of all the layer 3 specific assumptions.

Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 25 insertions, 0 deletions

diff --git a/include/linux/netfilter/xt_connbytes.h b/include/linux/netfilter/xt_connbytes.h
new file mode 100644
index 000000000000..c022c989754d
--- /dev/null
+++ b/include/linux/netfilter/xt_connbytes.h
@@ -0,0 +1,25 @@
+#ifndef _XT_CONNBYTES_H
+#define _XT_CONNBYTES_H
+
+enum xt_connbytes_what {
+	XT_CONNBYTES_PKTS,
+	XT_CONNBYTES_BYTES,
+	XT_CONNBYTES_AVGPKT,
+};
+
+enum xt_connbytes_direction {
+	XT_CONNBYTES_DIR_ORIGINAL,
+	XT_CONNBYTES_DIR_REPLY,
+	XT_CONNBYTES_DIR_BOTH,
+};
+
+struct xt_connbytes_info
+{
+	struct {
+		aligned_u64 from;	/* count to be matched */
+		aligned_u64 to;		/* count to be matched */
+	} count;
+	u_int8_t what;		/* ipt_connbytes_what */
+	u_int8_t direction;	/* ipt_connbytes_direction */
+};
+#endif