1/*
2 * Copyright (c) 2006 Patrick McHardy <kaber@trash.net>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#include <linux/module.h>
10#include <linux/init.h>
11#include <linux/skbuff.h>
12
13#include <linux/netfilter/x_tables.h>
14#include <linux/netfilter/xt_NFLOG.h>
15
16MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
17MODULE_DESCRIPTION("x_tables NFLOG target");
18MODULE_LICENSE("GPL");
19MODULE_ALIAS("ipt_NFLOG");
20MODULE_ALIAS("ip6t_NFLOG");
21
22static unsigned int
23nflog_target(struct sk_buff **pskb,
24	     const struct net_device *in, const struct net_device *out,
25	     unsigned int hooknum, const struct xt_target *target,
26	     const void *targinfo)
27{
28	const struct xt_nflog_info *info = targinfo;
29	struct nf_loginfo li;
30
31	li.type		     = NF_LOG_TYPE_ULOG;
32	li.u.ulog.copy_len   = info->len;
33	li.u.ulog.group	     = info->group;
34	li.u.ulog.qthreshold = info->threshold;
35
36	nf_log_packet(target->family, hooknum, *pskb, in, out, &li,
37		      "%s", info->prefix);
38	return XT_CONTINUE;
39}
40
41static int
42nflog_checkentry(const char *tablename, const void *entry,
43		 const struct xt_target *target, void *targetinfo,
44		 unsigned int hookmask)
45{
46	struct xt_nflog_info *info = targetinfo;
47
48	if (info->flags & ~XT_NFLOG_MASK)
49		return 0;
50	if (info->prefix[sizeof(info->prefix) - 1] != '\0')
51		return 0;
52	return 1;
53}
54
55static struct xt_target xt_nflog_target[] = {
56	{
57		.name		= "NFLOG",
58		.family		= AF_INET,
59		.checkentry	= nflog_checkentry,
60		.target		= nflog_target,
61		.targetsize	= sizeof(struct xt_nflog_info),
62		.me		= THIS_MODULE,
63	},
64	{
65		.name		= "NFLOG",
66		.family		= AF_INET6,
67		.checkentry	= nflog_checkentry,
68		.target		= nflog_target,
69		.targetsize	= sizeof(struct xt_nflog_info),
70		.me		= THIS_MODULE,
71	},
72};
73
74static int __init xt_nflog_init(void)
75{
76	return xt_register_targets(xt_nflog_target,
77				   ARRAY_SIZE(xt_nflog_target));
78}
79
80static void __exit xt_nflog_fini(void)
81{
82	xt_unregister_targets(xt_nflog_target, ARRAY_SIZE(xt_nflog_target));
83}
84
85module_init(xt_nflog_init);
86module_exit(xt_nflog_fini);
87