net/netfilter/xt_TRACE.c

   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);