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| 3 |
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| 4 | #include <linux/module.h>
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| 5 | #include <linux/skbuff.h>
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| 6 |
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| 7 | #include <linux/netfilter/x_tables.h>
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| 8 | #include <net/netfilter/nf_log.h>
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| 9 |
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| 10 | MODULE_DESCRIPTION("Xtables: packet flow tracing");
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| 11 | MODULE_LICENSE("GPL");
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| 12 | MODULE_ALIAS("ipt_TRACE");
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| 13 | MODULE_ALIAS("ip6t_TRACE");
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| 14 |
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| 15 | static int trace_tg_check(const struct xt_tgchk_param *par)
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| 16 | {
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| 17 | return nf_logger_find_get(par->family, NF_LOG_TYPE_LOG);
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| 18 | }
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| 19 |
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| 20 | static void trace_tg_destroy(const struct xt_tgdtor_param *par)
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| 21 | {
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| 22 | nf_logger_put(par->family, NF_LOG_TYPE_LOG);
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| 23 | }
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| 24 |
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| 25 | static unsigned int
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| 26 | trace_tg(struct sk_buff *skb, const struct xt_action_param *par)
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| 27 | {
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| 28 | skb->nf_trace = 1;
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| 29 | return XT_CONTINUE;
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| 30 | }
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| 31 |
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| 32 | static struct xt_target trace_tg_reg[] __read_mostly = {
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| 33 | {
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| 34 | .name = "TRACE",
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| 35 | .revision = 0,
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| 36 | .family = NFPROTO_IPV4,
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| 37 | .table = "raw",
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| 38 | .target = trace_tg,
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| 39 | .checkentry = trace_tg_check,
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| 40 | .destroy = trace_tg_destroy,
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| 41 | .me = THIS_MODULE,
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| 42 | },
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| 43 | #if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
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| 44 | {
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| 45 | .name = "TRACE",
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| 46 | .revision = 0,
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| 47 | .family = NFPROTO_IPV6,
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| 48 | .table = "raw",
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| 49 | .target = trace_tg,
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| 50 | .checkentry = trace_tg_check,
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| 51 | .destroy = trace_tg_destroy,
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| 52 | .me = THIS_MODULE,
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| 53 | },
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| 54 | #endif
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| 55 | };
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| 56 |
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| 57 | static int __init trace_tg_init(void)
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| 58 | {
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| 59 | return xt_register_targets(trace_tg_reg, ARRAY_SIZE(trace_tg_reg));
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| 60 | }
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| 61 |
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| 62 | static void __exit trace_tg_exit(void)
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| 63 | {
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| 64 | xt_unregister_targets(trace_tg_reg, ARRAY_SIZE(trace_tg_reg));
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| 65 | }
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| 66 |
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| 67 | module_init(trace_tg_init);
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| 68 | module_exit(trace_tg_exit);
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| 69 | MODULE_SOFTDEP("pre: nf_log_syslog");
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