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/net/netfilter/xt_CLASSIFY.c

http://github.com/mirrors/linux
C | 70 lines | 53 code | 10 blank | 7 comment | 0 complexity | 1fdbd783d4063563e8ea26379ade7c76 MD5 | raw file
 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * This is a module which is used for setting the skb->priority field
 4 * of an skb for qdisc classification.
 5 */
 6
 7/* (C) 2001-2002 Patrick McHardy <kaber@trash.net>
 8 */
 9
10#include <linux/module.h>
11#include <linux/skbuff.h>
12#include <linux/ip.h>
13#include <net/checksum.h>
14
15#include <linux/netfilter_ipv4.h>
16#include <linux/netfilter_ipv6.h>
17#include <linux/netfilter/x_tables.h>
18#include <linux/netfilter/xt_CLASSIFY.h>
19#include <linux/netfilter_arp.h>
20
21MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
22MODULE_LICENSE("GPL");
23MODULE_DESCRIPTION("Xtables: Qdisc classification");
24MODULE_ALIAS("ipt_CLASSIFY");
25MODULE_ALIAS("ip6t_CLASSIFY");
26MODULE_ALIAS("arpt_CLASSIFY");
27
28static unsigned int
29classify_tg(struct sk_buff *skb, const struct xt_action_param *par)
30{
31	const struct xt_classify_target_info *clinfo = par->targinfo;
32
33	skb->priority = clinfo->priority;
34	return XT_CONTINUE;
35}
36
37static struct xt_target classify_tg_reg[] __read_mostly = {
38	{
39		.name       = "CLASSIFY",
40		.revision   = 0,
41		.family     = NFPROTO_UNSPEC,
42		.hooks      = (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_FORWARD) |
43		              (1 << NF_INET_POST_ROUTING),
44		.target     = classify_tg,
45		.targetsize = sizeof(struct xt_classify_target_info),
46		.me         = THIS_MODULE,
47	},
48	{
49		.name       = "CLASSIFY",
50		.revision   = 0,
51		.family     = NFPROTO_ARP,
52		.hooks      = (1 << NF_ARP_OUT) | (1 << NF_ARP_FORWARD),
53		.target     = classify_tg,
54		.targetsize = sizeof(struct xt_classify_target_info),
55		.me         = THIS_MODULE,
56	},
57};
58
59static int __init classify_tg_init(void)
60{
61	return xt_register_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg));
62}
63
64static void __exit classify_tg_exit(void)
65{
66	xt_unregister_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg));
67}
68
69module_init(classify_tg_init);
70module_exit(classify_tg_exit);