mirror of
git://git.code.sf.net/p/xtables-addons/xtables-addons
synced 2025-09-06 04:35:12 +02:00
127 lines
3.1 KiB
C
127 lines
3.1 KiB
C
/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
|
|
* Patrick Schaaf <bof@bof.de>
|
|
* Martin Josefsson <gandalf@wlug.westbo.se>
|
|
* Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/* Kernel module to match an IP set. */
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/ip.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/version.h>
|
|
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
|
|
#include <linux/netfilter_ipv4/ip_tables.h>
|
|
#define xt_register_match ipt_register_match
|
|
#define xt_unregister_match ipt_unregister_match
|
|
#define xt_match ipt_match
|
|
#else
|
|
#include <linux/netfilter/x_tables.h>
|
|
#endif
|
|
#include "ip_set.h"
|
|
#include "ipt_set.h"
|
|
#include "../compat_xtables.h"
|
|
|
|
static inline int
|
|
match_set(const struct ipt_set_info *info,
|
|
const struct sk_buff *skb,
|
|
int inv)
|
|
{
|
|
if (ip_set_testip_kernel(info->index, skb, info->flags))
|
|
inv = !inv;
|
|
return inv;
|
|
}
|
|
|
|
static bool
|
|
match(const struct sk_buff *skb, const struct xt_action_param *par)
|
|
{
|
|
const struct ipt_set_info_match *info = par->matchinfo;
|
|
|
|
return match_set(&info->match_set,
|
|
skb,
|
|
info->match_set.flags[0] & IPSET_MATCH_INV);
|
|
}
|
|
|
|
static int
|
|
checkentry(const struct xt_mtchk_param *par)
|
|
{
|
|
struct ipt_set_info_match *info = par->matchinfo;
|
|
ip_set_id_t index;
|
|
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
|
|
if (matchsize != IPT_ALIGN(sizeof(struct ipt_set_info_match))) {
|
|
ip_set_printk("invalid matchsize %d", matchsize);
|
|
return -EINVAL;
|
|
}
|
|
#endif
|
|
|
|
index = ip_set_get_byindex(info->match_set.index);
|
|
|
|
if (index == IP_SET_INVALID_ID) {
|
|
ip_set_printk("Cannot find set indentified by id %u to match",
|
|
info->match_set.index);
|
|
return -ENOENT;
|
|
}
|
|
if (info->match_set.flags[IP_SET_MAX_BINDINGS] != 0) {
|
|
ip_set_printk("That's nasty!");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void destroy(const struct xt_mtdtor_param *par)
|
|
{
|
|
struct ipt_set_info_match *info = par->matchinfo;
|
|
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
|
|
if (matchsize != IPT_ALIGN(sizeof(struct ipt_set_info_match))) {
|
|
ip_set_printk("invalid matchsize %d", matchsize);
|
|
return;
|
|
}
|
|
#endif
|
|
ip_set_put_byindex(info->match_set.index);
|
|
}
|
|
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
|
|
static struct xt_match set_match = {
|
|
.name = "set",
|
|
.match = &match,
|
|
.checkentry = &checkentry,
|
|
.destroy = &destroy,
|
|
.me = THIS_MODULE
|
|
};
|
|
#else /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17) */
|
|
static struct xt_match set_match = {
|
|
.name = "set",
|
|
.family = AF_INET,
|
|
.match = &match,
|
|
.matchsize = sizeof(struct ipt_set_info_match),
|
|
.checkentry = &checkentry,
|
|
.destroy = &destroy,
|
|
.me = THIS_MODULE
|
|
};
|
|
#endif
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
|
|
MODULE_DESCRIPTION("iptables IP set match module");
|
|
|
|
static int __init ipt_ipset_init(void)
|
|
{
|
|
return xt_register_match(&set_match);
|
|
}
|
|
|
|
static void __exit ipt_ipset_fini(void)
|
|
{
|
|
xt_unregister_match(&set_match);
|
|
}
|
|
|
|
module_init(ipt_ipset_init);
|
|
module_exit(ipt_ipset_fini);
|