Linux Kernel  3.7.1
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xt_CLASSIFY.c
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1 /*
2  * This is a module which is used for setting the skb->priority field
3  * of an skb for qdisc classification.
4  */
5 
6 /* (C) 2001-2002 Patrick McHardy <[email protected]>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12 
13 #include <linux/module.h>
14 #include <linux/skbuff.h>
15 #include <linux/ip.h>
16 #include <net/checksum.h>
17 
18 #include <linux/netfilter_ipv4.h>
19 #include <linux/netfilter_ipv6.h>
20 #include <linux/netfilter/x_tables.h>
22 #include <linux/netfilter_arp.h>
23 
24 MODULE_AUTHOR("Patrick McHardy <[email protected]>");
25 MODULE_LICENSE("GPL");
26 MODULE_DESCRIPTION("Xtables: Qdisc classification");
27 MODULE_ALIAS("ipt_CLASSIFY");
28 MODULE_ALIAS("ip6t_CLASSIFY");
29 MODULE_ALIAS("arpt_CLASSIFY");
30 
31 static unsigned int
32 classify_tg(struct sk_buff *skb, const struct xt_action_param *par)
33 {
34  const struct xt_classify_target_info *clinfo = par->targinfo;
35 
36  skb->priority = clinfo->priority;
37  return XT_CONTINUE;
38 }
39 
40 static struct xt_target classify_tg_reg[] __read_mostly = {
41  {
42  .name = "CLASSIFY",
43  .revision = 0,
44  .family = NFPROTO_UNSPEC,
45  .hooks = (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_FORWARD) |
46  (1 << NF_INET_POST_ROUTING),
47  .target = classify_tg,
48  .targetsize = sizeof(struct xt_classify_target_info),
49  .me = THIS_MODULE,
50  },
51  {
52  .name = "CLASSIFY",
53  .revision = 0,
54  .family = NFPROTO_ARP,
55  .hooks = (1 << NF_ARP_OUT) | (1 << NF_ARP_FORWARD),
56  .target = classify_tg,
57  .targetsize = sizeof(struct xt_classify_target_info),
58  .me = THIS_MODULE,
59  },
60 };
61 
62 static int __init classify_tg_init(void)
63 {
64  return xt_register_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg));
65 }
66 
67 static void __exit classify_tg_exit(void)
68 {
69  xt_unregister_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg));
70 }
71 
72 module_init(classify_tg_init);
73 module_exit(classify_tg_exit);