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_LICENSE("GPL");
   9 MODULE_ALIAS("ipt_TRACE");
  10 MODULE_ALIAS("ip6t_TRACE");
  11
  12 static unsigned int
  13 trace_tg(struct sk_buff *skb, const struct net_device *in,
  14          const struct net_device *out, unsigned int hooknum,
  15          const struct xt_target *target, const void *targinfo)
  16 {
  17         skb->nf_trace = 1;
  18         return XT_CONTINUE;
  19 }
  20
  21 static struct xt_target trace_tg_reg[] __read_mostly = {
  22         {
  23                 .name           = "TRACE",
  24                 .family         = AF_INET,
  25                 .target         = trace_tg,
  26                 .table          = "raw",
  27                 .me             = THIS_MODULE,
  28         },
  29         {
  30                 .name           = "TRACE",
  31                 .family         = AF_INET6,
  32                 .target         = trace_tg,
  33                 .table          = "raw",
  34                 .me             = THIS_MODULE,
  35         },
  36 };
  37
  38 static int __init trace_tg_init(void)
  39 {
  40         return xt_register_targets(trace_tg_reg, ARRAY_SIZE(trace_tg_reg));
  41 }
  42
  43 static void __exit trace_tg_exit(void)
  44 {
  45         xt_unregister_targets(trace_tg_reg, ARRAY_SIZE(trace_tg_reg));
  46 }
  47
  48 module_init(trace_tg_init);
  49 module_exit(trace_tg_exit);