Eric Lee / smarc-fsl-linux-kernel

Blame view

net/netfilter/xt_mark.c 2.07 KB
edit raw normal view history
81f7e3824   Eric Lee   Initial Release, ... 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
 
  /*
   *	xt_mark - Netfilter module to match NFMARK value
   *
   *	(C) 1999-2001 Marc Boucher <marc@mbsi.ca>
   *	Copyright © CC Computer Consultants GmbH, 2007 - 2008
   *	Jan Engelhardt <jengelh@medozas.de>
   *
   *	This program is free software; you can redistribute it and/or modify
   *	it under the terms of the GNU General Public License version 2 as
   *	published by the Free Software Foundation.
   */
  
  #include <linux/module.h>
  #include <linux/skbuff.h>
  
  #include <linux/netfilter/xt_mark.h>
  #include <linux/netfilter/x_tables.h>
  
  MODULE_LICENSE("GPL");
  MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
  MODULE_DESCRIPTION("Xtables: packet mark operations");
  MODULE_ALIAS("ipt_mark");
  MODULE_ALIAS("ip6t_mark");
  MODULE_ALIAS("ipt_MARK");
  MODULE_ALIAS("ip6t_MARK");
  MODULE_ALIAS("arpt_MARK");
  
  static unsigned int
  mark_tg(struct sk_buff *skb, const struct xt_action_param *par)
  {
  	const struct xt_mark_tginfo2 *info = par->targinfo;
  
  	skb->mark = (skb->mark & ~info->mask) ^ info->mark;
  	return XT_CONTINUE;
  }
  
  static bool
  mark_mt(const struct sk_buff *skb, struct xt_action_param *par)
  {
  	const struct xt_mark_mtinfo1 *info = par->matchinfo;
  
  	return ((skb->mark & info->mask) == info->mark) ^ info->invert;
  }
  
  static struct xt_target mark_tg_reg __read_mostly = {
  	.name           = "MARK",
  	.revision       = 2,
  	.family         = NFPROTO_UNSPEC,
  	.target         = mark_tg,
  	.targetsize     = sizeof(struct xt_mark_tginfo2),
  	.me             = THIS_MODULE,
  };
  
  static struct xt_match mark_mt_reg __read_mostly = {
  	.name           = "mark",
  	.revision       = 1,
  	.family         = NFPROTO_UNSPEC,
  	.match          = mark_mt,
  	.matchsize      = sizeof(struct xt_mark_mtinfo1),
  	.me             = THIS_MODULE,
  };
  
  static int __init mark_mt_init(void)
  {
  	int ret;
  
  	ret = xt_register_target(&mark_tg_reg);
  	if (ret < 0)
  		return ret;
  	ret = xt_register_match(&mark_mt_reg);
  	if (ret < 0) {
  		xt_unregister_target(&mark_tg_reg);
  		return ret;
  	}
  	return 0;
  }
  
  static void __exit mark_mt_exit(void)
  {
  	xt_unregister_match(&mark_mt_reg);
  	xt_unregister_target(&mark_tg_reg);
  }
  
  module_init(mark_mt_init);
  module_exit(mark_mt_exit);