[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, 0 insertions, 81 deletions

diff --git a/net/ipv6/netfilter/ip6t_mac.c b/net/ipv6/netfilter/ip6t_mac.c
deleted file mode 100644
index c848152315bc3..0000000000000
--- a/net/ipv6/netfilter/ip6t_mac.c
+++ /dev/null
@@ -1,81 +0,0 @@
-/* Kernel module to match MAC address parameters. */
-
-/* (C) 1999-2001 Paul `Rusty' Russell
- * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/if_ether.h>
-#include <linux/etherdevice.h>
-
-#include <linux/netfilter_ipv6/ip6t_mac.h>
-#include <linux/netfilter_ipv6/ip6_tables.h>
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("MAC address matching module for IPv6");
-MODULE_AUTHOR("Netfilter Core Teaam <coreteam@netfilter.org>");
-
-static int
-match(const struct sk_buff *skb,
-      const struct net_device *in,
-      const struct net_device *out,
-      const void *matchinfo,
-      int offset,
-      unsigned int protoff,
-      int *hotdrop)
-{
-    const struct ip6t_mac_info *info = matchinfo;
-
-    /* Is mac pointer valid? */
-    return (skb->mac.raw >= skb->head
-	    && (skb->mac.raw + ETH_HLEN) <= skb->data
-	    /* If so, compare... */
-	    && ((!compare_ether_addr(eth_hdr(skb)->h_source, info->srcaddr))
-		^ info->invert));
-}
-
-static int
-ip6t_mac_checkentry(const char *tablename,
-		   const struct ip6t_ip6 *ip,
-		   void *matchinfo,
-		   unsigned int matchsize,
-		   unsigned int hook_mask)
-{
-	if (hook_mask
-	    & ~((1 << NF_IP6_PRE_ROUTING) | (1 << NF_IP6_LOCAL_IN)
-		| (1 << NF_IP6_FORWARD))) {
-		printk("ip6t_mac: only valid for PRE_ROUTING, LOCAL_IN or"
-		       " FORWARD\n");
-		return 0;
-	}
-
-	if (matchsize != IP6T_ALIGN(sizeof(struct ip6t_mac_info)))
-		return 0;
-
-	return 1;
-}
-
-static struct ip6t_match mac_match = {
-	.name		= "mac",
-	.match		= &match,
-	.checkentry	= &ip6t_mac_checkentry,
-	.me		= THIS_MODULE,
-};
-
-static int __init init(void)
-{
-	return ip6t_register_match(&mac_match);
-}
-
-static void __exit fini(void)
-{
-	ip6t_unregister_match(&mac_match);
-}
-
-module_init(init);
-module_exit(fini);