1 /* This is a module which is used to mark packets for tracing. 2 */ 3 #include <linux/module.h> 4 #include <linux/skbuff.h> 5 6 #include <linux/netfilter/x_tables.h> 7 8 MODULE_DESCRIPTION("Xtables: packet flow tracing"); 9 MODULE_LICENSE("GPL"); 10 MODULE_ALIAS("ipt_TRACE"); 11 MODULE_ALIAS("ip6t_TRACE"); 12 13 static unsigned int 14 trace_tg(struct sk_buff *skb, const struct xt_action_param *par) 15 { 16 skb->nf_trace = 1; 17 return XT_CONTINUE; 18 } 19 20 static struct xt_target trace_tg_reg __read_mostly = { 21 .name = "TRACE", 22 .revision = 0, 23 .family = NFPROTO_UNSPEC, 24 .table = "raw", 25 .target = trace_tg, 26 .me = THIS_MODULE, 27 }; 28 29 static int __init trace_tg_init(void) 30 { 31 return xt_register_target(&trace_tg_reg); 32 } 33 34 static void __exit trace_tg_exit(void) 35 { 36 xt_unregister_target(&trace_tg_reg); 37 } 38 39 module_init(trace_tg_init); 40 module_exit(trace_tg_exit); 41