blob: 349ab5609b1b52b757829d892243f4c6de6ab616 [file] [log] [blame]
Thomas Gleixner09c434b2019-05-19 13:08:20 +01001// SPDX-License-Identifier: GPL-2.0-only
Jozsef Kadlecsikba9dda32007-07-07 22:21:23 -07002/* This is a module which is used to mark packets for tracing.
3 */
4#include <linux/module.h>
5#include <linux/skbuff.h>
6
7#include <linux/netfilter/x_tables.h>
Liping Zhang36f959c2016-06-08 20:43:19 +08008#include <net/netfilter/nf_log.h>
Jozsef Kadlecsikba9dda32007-07-07 22:21:23 -07009
Jan Engelhardt2ae15b62008-01-14 23:42:28 -080010MODULE_DESCRIPTION("Xtables: packet flow tracing");
Jozsef Kadlecsikba9dda32007-07-07 22:21:23 -070011MODULE_LICENSE("GPL");
12MODULE_ALIAS("ipt_TRACE");
13MODULE_ALIAS("ip6t_TRACE");
14
Liping Zhang36f959c2016-06-08 20:43:19 +080015static int trace_tg_check(const struct xt_tgchk_param *par)
16{
17 return nf_logger_find_get(par->family, NF_LOG_TYPE_LOG);
18}
19
20static void trace_tg_destroy(const struct xt_tgdtor_param *par)
21{
22 nf_logger_put(par->family, NF_LOG_TYPE_LOG);
23}
24
Jozsef Kadlecsikba9dda32007-07-07 22:21:23 -070025static unsigned int
Jan Engelhardt4b560b42009-07-05 19:43:26 +020026trace_tg(struct sk_buff *skb, const struct xt_action_param *par)
Jozsef Kadlecsikba9dda32007-07-07 22:21:23 -070027{
Herbert Xu3db05fea2007-10-15 00:53:15 -070028 skb->nf_trace = 1;
Jozsef Kadlecsikba9dda32007-07-07 22:21:23 -070029 return XT_CONTINUE;
30}
31
Jan Engelhardt55b69e92008-10-08 11:35:01 +020032static struct xt_target trace_tg_reg __read_mostly = {
Liping Zhang36f959c2016-06-08 20:43:19 +080033 .name = "TRACE",
34 .revision = 0,
35 .family = NFPROTO_UNSPEC,
36 .table = "raw",
37 .target = trace_tg,
38 .checkentry = trace_tg_check,
39 .destroy = trace_tg_destroy,
40 .me = THIS_MODULE,
Jozsef Kadlecsikba9dda32007-07-07 22:21:23 -070041};
42
Jan Engelhardtd3c5ee62007-12-04 23:24:03 -080043static int __init trace_tg_init(void)
Jozsef Kadlecsikba9dda32007-07-07 22:21:23 -070044{
Jan Engelhardt55b69e92008-10-08 11:35:01 +020045 return xt_register_target(&trace_tg_reg);
Jozsef Kadlecsikba9dda32007-07-07 22:21:23 -070046}
47
Jan Engelhardtd3c5ee62007-12-04 23:24:03 -080048static void __exit trace_tg_exit(void)
Jozsef Kadlecsikba9dda32007-07-07 22:21:23 -070049{
Jan Engelhardt55b69e92008-10-08 11:35:01 +020050 xt_unregister_target(&trace_tg_reg);
Jozsef Kadlecsikba9dda32007-07-07 22:21:23 -070051}
52
Jan Engelhardtd3c5ee62007-12-04 23:24:03 -080053module_init(trace_tg_init);
54module_exit(trace_tg_exit);