mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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2e4e6a17af
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>
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/* IP tables module for matching the routing realm
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*
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* $Id: ipt_realm.c,v 1.3 2004/03/05 13:25:40 laforge Exp $
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*
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* (C) 2003 by Sampsa Ranta <sampsa@netsonic.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <net/route.h>
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#include <linux/netfilter_ipv4.h>
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#include <linux/netfilter/xt_realm.h>
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#include <linux/netfilter/x_tables.h>
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MODULE_AUTHOR("Sampsa Ranta <sampsa@netsonic.fi>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("X_tables realm match");
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MODULE_ALIAS("ipt_realm");
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static int
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match(const struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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const void *matchinfo,
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int offset,
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unsigned int protoff,
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int *hotdrop)
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{
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const struct xt_realm_info *info = matchinfo;
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struct dst_entry *dst = skb->dst;
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return (info->id == (dst->tclassid & info->mask)) ^ info->invert;
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}
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static int check(const char *tablename,
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const void *ip,
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void *matchinfo,
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unsigned int matchsize,
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unsigned int hook_mask)
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{
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if (hook_mask
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& ~((1 << NF_IP_POST_ROUTING) | (1 << NF_IP_FORWARD) |
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(1 << NF_IP_LOCAL_OUT) | (1 << NF_IP_LOCAL_IN))) {
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printk("xt_realm: only valid for POST_ROUTING, LOCAL_OUT, "
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"LOCAL_IN or FORWARD.\n");
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return 0;
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}
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if (matchsize != XT_ALIGN(sizeof(struct xt_realm_info))) {
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printk("xt_realm: invalid matchsize.\n");
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return 0;
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}
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return 1;
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}
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static struct xt_match realm_match = {
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.name = "realm",
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.match = match,
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.checkentry = check,
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.me = THIS_MODULE
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};
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static int __init init(void)
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{
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return xt_register_match(AF_INET, &realm_match);
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}
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static void __exit fini(void)
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{
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xt_unregister_match(AF_INET, &realm_match);
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}
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module_init(init);
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module_exit(fini);
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