root/net/netfilter/xt_TRACE.c

DEFINITIONS

1. trace_tg
2. trace_tg_init
3. trace_tg_exit

/* This is a module which is used to mark packets for tracing.
 */
#include <linux/module.h>
#include <linux/skbuff.h>

#include <linux/netfilter/x_tables.h>

MODULE_DESCRIPTION("Xtables: packet flow tracing");
MODULE_LICENSE("GPL");
MODULE_ALIAS("ipt_TRACE");
MODULE_ALIAS("ip6t_TRACE");

static unsigned int
trace_tg(struct sk_buff *skb, const struct xt_target_param *par)
{
        skb->nf_trace = 1;
        return XT_CONTINUE;
}

static struct xt_target trace_tg_reg __read_mostly = {
        .name       = "TRACE",
        .revision   = 0,
        .family     = NFPROTO_UNSPEC,
        .table      = "raw",
        .target     = trace_tg,
        .me         = THIS_MODULE,
};

static int __init trace_tg_init(void)
{
        return xt_register_target(&trace_tg_reg);
}

static void __exit trace_tg_exit(void)
{
        xt_unregister_target(&trace_tg_reg);
}

module_init(trace_tg_init);
module_exit(trace_tg_exit);