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Linux/net/netfilter/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 <kaber@trash.net>
  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>
 21 #include <linux/netfilter/xt_CLASSIFY.h>
 22 #include <linux/netfilter_arp.h>
 23 
 24 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
 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);
 74 

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