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/*
* Copyright (c) 2006 Patrick McHardy <kaber@trash.net>
*
* 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/init.h>
#include <linux/skbuff.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_NFLOG.h>
#include <net/netfilter/nf_log.h>
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_DESCRIPTION("Xtables: packet logging to netlink using NFLOG");
MODULE_LICENSE("GPL");
MODULE_ALIAS("ipt_NFLOG");
MODULE_ALIAS("ip6t_NFLOG");
static unsigned int
nflog_tg(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)
{
const struct xt_nflog_info *info = targinfo;
struct nf_loginfo li;
li.type = NF_LOG_TYPE_ULOG;
li.u.ulog.copy_len = info->len;
li.u.ulog.group = info->group;
li.u.ulog.qthreshold = info->threshold;
nf_log_packet(target->family, hooknum, skb, in, out, &li,
"%s", info->prefix);
return XT_CONTINUE;
}
static bool
nflog_tg_check(const char *tablename, const void *entry,
const struct xt_target *target, void *targetinfo,
unsigned int hookmask)
{
const struct xt_nflog_info *info = targetinfo;
if (info->flags & ~XT_NFLOG_MASK)
return false;
if (info->prefix[sizeof(info->prefix) - 1] != '\0')
return false;
return true;
}
static struct xt_target nflog_tg_reg[] __read_mostly = {
{
.name = "NFLOG",
.family = AF_INET,
.checkentry = nflog_tg_check,
.target = nflog_tg,
.targetsize = sizeof(struct xt_nflog_info),
.me = THIS_MODULE,
},
{
.name = "NFLOG",
.family = AF_INET6,
.checkentry = nflog_tg_check,
.target = nflog_tg,
.targetsize = sizeof(struct xt_nflog_info),
.me = THIS_MODULE,
},
};
static int __init nflog_tg_init(void)
{
return xt_register_targets(nflog_tg_reg, ARRAY_SIZE(nflog_tg_reg));
}
static void __exit nflog_tg_exit(void)
{
xt_unregister_targets(nflog_tg_reg, ARRAY_SIZE(nflog_tg_reg));
}
module_init(nflog_tg_init);
module_exit(nflog_tg_exit);
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