| 1 | |
| 2 | |
| 3 | * This is a module which is used for setting the skb->priority field
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| 4 | * of an skb for qdisc classification.
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| 5 |
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| 6 |
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| 7 | |
| 8 |
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| 9 |
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| 10 | #include <linux/module.h>
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| 11 | #include <linux/skbuff.h>
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| 12 | #include <linux/ip.h>
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| 13 | #include <net/checksum.h>
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| 14 |
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| 15 | #include <linux/netfilter_ipv4.h>
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| 16 | #include <linux/netfilter_ipv6.h>
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| 17 | #include <linux/netfilter/x_tables.h>
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| 18 | #include <linux/netfilter/xt_CLASSIFY.h>
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| 19 | #include <linux/netfilter_arp.h>
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| 20 |
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| 21 | MODULE_AUTHOR("Patrick McHardy <[email protected]>");
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| 22 | MODULE_LICENSE("GPL");
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| 23 | MODULE_DESCRIPTION("Xtables: Qdisc classification");
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| 24 | MODULE_ALIAS("ipt_CLASSIFY");
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| 25 | MODULE_ALIAS("ip6t_CLASSIFY");
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| 26 | MODULE_ALIAS("arpt_CLASSIFY");
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| 27 |
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| 28 | static unsigned int
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| 29 | classify_tg(struct sk_buff *skb, const struct xt_action_param *par)
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| 30 | {
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| 31 | const struct xt_classify_target_info *clinfo = par->targinfo;
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| 32 |
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| 33 | skb->priority = clinfo->priority;
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| 34 | return XT_CONTINUE;
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| 35 | }
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| 36 |
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| 37 | static struct xt_target classify_tg_reg[] __read_mostly = {
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| 38 | {
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| 39 | .name = "CLASSIFY",
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| 40 | .revision = 0,
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| 41 | .family = NFPROTO_IPV4,
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| 42 | .hooks = (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_FORWARD) |
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| 43 | (1 << NF_INET_POST_ROUTING),
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| 44 | .target = classify_tg,
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| 45 | .targetsize = sizeof(struct xt_classify_target_info),
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| 46 | .me = THIS_MODULE,
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| 47 | },
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| 48 | {
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| 49 | .name = "CLASSIFY",
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| 50 | .revision = 0,
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| 51 | .family = NFPROTO_ARP,
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| 52 | .hooks = (1 << NF_ARP_OUT) | (1 << NF_ARP_FORWARD),
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| 53 | .target = classify_tg,
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| 54 | .targetsize = sizeof(struct xt_classify_target_info),
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| 55 | .me = THIS_MODULE,
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| 56 | },
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| 57 | #if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
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| 58 | {
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| 59 | .name = "CLASSIFY",
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| 60 | .revision = 0,
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| 61 | .family = NFPROTO_IPV6,
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| 62 | .hooks = (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_FORWARD) |
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| 63 | (1 << NF_INET_POST_ROUTING),
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| 64 | .target = classify_tg,
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| 65 | .targetsize = sizeof(struct xt_classify_target_info),
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| 66 | .me = THIS_MODULE,
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| 67 | },
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| 68 | #endif
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| 69 | };
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| 70 |
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| 71 | static int __init classify_tg_init(void)
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| 72 | {
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| 73 | return xt_register_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg));
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| 74 | }
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| 75 |
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| 76 | static void __exit classify_tg_exit(void)
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| 77 | {
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| 78 | xt_unregister_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg));
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| 79 | }
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| 80 |
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| 81 | module_init(classify_tg_init);
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| 82 | module_exit(classify_tg_exit);
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