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 8MODULE_DESCRIPTION("Xtables: packet flow tracing"); 9MODULE_LICENSE("GPL"); 10MODULE_ALIAS("ipt_TRACE"); 11MODULE_ALIAS("ip6t_TRACE"); 12 13static unsigned int 14trace_tg(struct sk_buff *skb, const struct xt_action_param *par) 15{ 16 skb->nf_trace = 1; 17 return XT_CONTINUE; 18} 19 20static 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 29static int __init trace_tg_init(void) 30{ 31 return xt_register_target(&trace_tg_reg); 32} 33 34static void __exit trace_tg_exit(void) 35{ 36 xt_unregister_target(&trace_tg_reg); 37} 38 39module_init(trace_tg_init); 40module_exit(trace_tg_exit); 41