[NETFILTER]: x_tables: add TRACE target
The TRACE target can be used to follow IP and IPv6 packets through
the ruleset.
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Patrick NcHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/xt_TRACE.c b/net/netfilter/xt_TRACE.c
new file mode 100644
index 0000000..b82fc46
--- /dev/null
+++ b/net/netfilter/xt_TRACE.c
@@ -0,0 +1,53 @@
+/* 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_LICENSE("GPL");
+MODULE_ALIAS("ipt_TRACE");
+MODULE_ALIAS("ip6t_TRACE");
+
+static unsigned int
+target(struct sk_buff **pskb,
+ const struct net_device *in,
+ const struct net_device *out,
+ unsigned int hooknum,
+ const struct xt_target *target,
+ const void *targinfo)
+{
+ (*pskb)->nf_trace = 1;
+ return XT_CONTINUE;
+}
+
+static struct xt_target xt_trace_target[] = {
+ {
+ .name = "TRACE",
+ .family = AF_INET,
+ .target = target,
+ .table = "raw",
+ .me = THIS_MODULE,
+ },
+ {
+ .name = "TRACE",
+ .family = AF_INET6,
+ .target = target,
+ .table = "raw",
+ .me = THIS_MODULE,
+ },
+};
+
+static int __init xt_trace_init(void)
+{
+ return xt_register_targets(xt_trace_target,
+ ARRAY_SIZE(xt_trace_target));
+}
+
+static void __exit xt_trace_fini(void)
+{
+ xt_unregister_targets(xt_trace_target, ARRAY_SIZE(xt_trace_target));
+}
+
+module_init(xt_trace_init);
+module_exit(xt_trace_fini);
