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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/module.h>
#include <linux/ip.h>
#include <linux/skbuff.h>
#include <linux/version.h>
#include <linux/netfilter_ipv4.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
#include <linux/netfilter_ipv4/ip_tables.h>
#define xt_register_target ipt_register_target
#define xt_unregister_target ipt_unregister_target
#define xt_target ipt_target
#define XT_CONTINUE IPT_CONTINUE
#else
#include <linux/netfilter/x_tables.h>
#endif
#include <linux/netfilter_ipv4/ipt_set.h>
static unsigned int
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
target(struct sk_buff **pskb,
unsigned int hooknum,
const struct net_device *in,
const struct net_device *out,
const void *targinfo,
void *userinfo)
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
target(struct sk_buff **pskb,
const struct net_device *in,
const struct net_device *out,
unsigned int hooknum,
const void *targinfo,
void *userinfo)
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
target(struct sk_buff **pskb,
const struct net_device *in,
const struct net_device *out,
unsigned int hooknum,
const struct xt_target *target,
const void *targinfo,
void *userinfo)
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
target(struct sk_buff **pskb,
const struct net_device *in,
const struct net_device *out,
unsigned int hooknum,
const struct xt_target *target,
const void *targinfo)
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
target(struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
unsigned int hooknum,
const struct xt_target *target,
const void *targinfo)
#else /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28) */
target(struct sk_buff *skb,
const struct xt_target_param *par)
#endif
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
const struct ipt_set_info_target *info = targinfo;
#else
const struct ipt_set_info_target *info = par->targinfo;
#endif
#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 XT_CONTINUE;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
static int
checkentry(const char *tablename,
const struct ipt_entry *e,
void *targinfo,
unsigned int targinfosize,
unsigned int hook_mask)
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
static int
checkentry(const char *tablename,
const void *e,
void *targinfo,
unsigned int targinfosize,
unsigned int hook_mask)
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
static int
checkentry(const char *tablename,
const void *e,
const struct xt_target *target,
void *targinfo,
unsigned int targinfosize,
unsigned int hook_mask)
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
static int
checkentry(const char *tablename,
const void *e,
const struct xt_target *target,
void *targinfo,
unsigned int hook_mask)
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
static bool
checkentry(const char *tablename,
const void *e,
const struct xt_target *target,
void *targinfo,
unsigned int hook_mask)
#else /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28) */
static bool
checkentry(const struct xt_tgchk_param *par)
#endif
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
const struct ipt_set_info_target *info = targinfo;
#else
const struct ipt_set_info_target *info = par->targinfo;
#endif
ip_set_id_t index;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
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;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
static void destroy(void *targetinfo,
unsigned int targetsize)
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
static void destroy(const struct xt_target *target,
void *targetinfo,
unsigned int targetsize)
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
static void destroy(const struct xt_target *target,
void *targetinfo)
#else /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28) */
static void destroy(const struct xt_tgdtor_param *par)
#endif
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
const struct ipt_set_info_target *info = targetinfo;
#else
const struct ipt_set_info_target *info = par->targinfo;
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
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_byindex(info->add_set.index);
if (info->del_set.index != IP_SET_INVALID_ID)
ip_set_put_byindex(info->del_set.index);
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
static struct xt_target SET_target = {
.name = "SET",
.target = target,
.checkentry = checkentry,
.destroy = destroy,
.me = THIS_MODULE
};
#else /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17) */
static struct xt_target SET_target = {
.name = "SET",
.family = AF_INET,
.target = target,
.targetsize = sizeof(struct ipt_set_info_target),
.checkentry = checkentry,
.destroy = destroy,
.me = THIS_MODULE
};
#endif
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
MODULE_DESCRIPTION("iptables IP set target module");
static int __init ipt_SET_init(void)
{
return xt_register_target(&SET_target);
}
static void __exit ipt_SET_fini(void)
{
xt_unregister_target(&SET_target);
}
module_init(ipt_SET_init);
module_exit(ipt_SET_fini);
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