tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#include <net/netfilter/nf_log.h>
16
17MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
18MODULE_DESCRIPTION("Xtables: packet logging to netlink using NFLOG");
19MODULE_LICENSE("GPL");
20MODULE_ALIAS("ipt_NFLOG");
21MODULE_ALIAS("ip6t_NFLOG");
22
23static unsigned int
24nflog_tg(struct sk_buff *skb, const struct xt_target_param *par)
25{
26 const struct xt_nflog_info *info = par->targinfo;
27 struct nf_loginfo li;
28
29 li.type = NF_LOG_TYPE_ULOG;
30 li.u.ulog.copy_len = info->len;
31 li.u.ulog.group = info->group;
32 li.u.ulog.qthreshold = info->threshold;
33
34 nf_log_packet(par->family, par->hooknum, skb, par->in,
35 par->out, &li, "%s", info->prefix);
36 return XT_CONTINUE;
37}
38
39static bool nflog_tg_check(const struct xt_tgchk_param *par)
40{
41 const struct xt_nflog_info *info = par->targinfo;
42
43 if (info->flags & ~XT_NFLOG_MASK)
44 return false;
45 if (info->prefix[sizeof(info->prefix) - 1] != '\0')
46 return false;
47 return true;
48}
49
50static struct xt_target nflog_tg_reg __read_mostly = {
51 .name = "NFLOG",
52 .revision = 0,
53 .family = NFPROTO_UNSPEC,
54 .checkentry = nflog_tg_check,
55 .target = nflog_tg,
56 .targetsize = sizeof(struct xt_nflog_info),
57 .me = THIS_MODULE,
58};
59
60static int __init nflog_tg_init(void)
61{
62 return xt_register_target(&nflog_tg_reg);
63}
64
65static void __exit nflog_tg_exit(void)
66{
67 xt_unregister_target(&nflog_tg_reg);
68}
69
70module_init(nflog_tg_init);
71module_exit(nflog_tg_exit);