1 files changed, 55 insertions, 0 deletions
diff --git a/net/netfilter/xt_TRACE.c b/net/netfilter/xt_TRACE.c
new file mode 100644
index 000000000..5582dce98
--- /dev/null
+++ b/net/netfilter/xt_TRACE.c
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* 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>
+#include <net/netfilter/nf_log.h>
+
+MODULE_DESCRIPTION("Xtables: packet flow tracing");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_TRACE");
+MODULE_ALIAS("ip6t_TRACE");
+
+static int trace_tg_check(const struct xt_tgchk_param *par)
+{
+	return nf_logger_find_get(par->family, NF_LOG_TYPE_LOG);
+}
+
+static void trace_tg_destroy(const struct xt_tgdtor_param *par)
+{
+	nf_logger_put(par->family, NF_LOG_TYPE_LOG);
+}
+
+static unsigned int
+trace_tg(struct sk_buff *skb, const struct xt_action_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,
+	.checkentry	= trace_tg_check,
+	.destroy	= trace_tg_destroy,
+	.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);
+MODULE_SOFTDEP("pre: nf_log_syslog");