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/* 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.
*/
/* ipt_SET.c - netfilter target to manipulate IP sets */
#include <linux/types.h>
#include <linux/ip.h>
#include <linux/timer.h>
#include <linux/module.h>
#include <linux/netfilter.h>
#include <linux/netdevice.h>
#include <linux/if.h>
#include <linux/inetdevice.h>
#include <linux/version.h>
#include <net/protocol.h>
#include <net/checksum.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netfilter_ipv4/ipt_set.h>
static unsigned int
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
target(struct sk_buff *skb,
#else
target(struct sk_buff **pskb,
#endif
const struct net_device *in,
const struct net_device *out,
unsigned int hooknum,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
const struct xt_target *target,
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
const void *targinfo,
void *userinfo)
#else
const void *targinfo)
#endif
{
const struct ipt_set_info_target *info = targinfo;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
struct sk_buff *skb = *pskb;
#endif
if (info->add_set.index != IP_SET_INVALID_ID)
ip_set_addip_kernel(info->add_set.index,
skb,
info->add_set.flags);
if (info->del_set.index != IP_SET_INVALID_ID)
ip_set_delip_kernel(info->del_set.index,
skb,
info->del_set.flags);
return IPT_CONTINUE;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)
static bool
#else
static int
#endif
checkentry(const char *tablename,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
const void *e,
#else
const struct ipt_entry *e,
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
const struct xt_target *target,
#endif
void *targinfo,
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
unsigned int targinfosize,
#endif
unsigned int hook_mask)
{
struct ipt_set_info_target *info = targinfo;
ip_set_id_t index;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
if (targinfosize != IPT_ALIGN(sizeof(*info))) {
DP("bad target info size %u", targinfosize);
return 0;
}
#endif
if (info->add_set.index != IP_SET_INVALID_ID) {
index = ip_set_get_byindex(info->add_set.index);
if (index == IP_SET_INVALID_ID) {
ip_set_printk("cannot find add_set index %u as target",
info->add_set.index);
return 0; /* error */
}
}
if (info->del_set.index != IP_SET_INVALID_ID) {
index = ip_set_get_byindex(info->del_set.index);
if (index == IP_SET_INVALID_ID) {
ip_set_printk("cannot find del_set index %u as target",
info->del_set.index);
return 0; /* error */
}
}
if (info->add_set.flags[IP_SET_MAX_BINDINGS] != 0
|| info->del_set.flags[IP_SET_MAX_BINDINGS] != 0) {
ip_set_printk("That's nasty!");
return 0; /* error */
}
return 1;
}
static void destroy(
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
const struct xt_target *target,
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
void *targetinfo, unsigned int targetsize)
#else
void *targetinfo)
#endif
{
struct ipt_set_info_target *info = targetinfo;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
if (targetsize != IPT_ALIGN(sizeof(struct ipt_set_info_target))) {
ip_set_printk("invalid targetsize %d", targetsize);
return;
}
#endif
if (info->add_set.index != IP_SET_INVALID_ID)
ip_set_put(info->add_set.index);
if (info->del_set.index != IP_SET_INVALID_ID)
ip_set_put(info->del_set.index);
}
static struct ipt_target SET_target = {
.name = "SET",
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
.family = AF_INET,
#endif
.target = target,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
.targetsize = sizeof(struct ipt_set_info_target),
#endif
.checkentry = checkentry,
.destroy = destroy,
.me = THIS_MODULE
};
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
MODULE_DESCRIPTION("iptables IP set target module");
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
#define ipt_register_target xt_register_target
#define ipt_unregister_target xt_unregister_target
#endif
static int __init ipt_SET_init(void)
{
return ipt_register_target(&SET_target);
}
static void __exit ipt_SET_fini(void)
{
ipt_unregister_target(&SET_target);
}
module_init(ipt_SET_init);
module_exit(ipt_SET_fini);
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