1 files changed, 45 insertions, 0 deletions
diff --git a/net/netfilter/xt_comment.c b/net/netfilter/xt_comment.c
new file mode 100644
index 0000000..e821798
--- /dev/null
+++ b/net/netfilter/xt_comment.c
@@ -0,0 +1,45 @@
+/*
+ * Implements a dummy match to allow attaching comments to rules
+ *
+ * 2003-05-13 Brad Fisher (brad@info-link.net)
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter/xt_comment.h>
+
+MODULE_AUTHOR("Brad Fisher <brad@info-link.net>");
+MODULE_DESCRIPTION("Xtables: No-op match which can be tagged with a comment");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_comment");
+MODULE_ALIAS("ip6t_comment");
+
+static bool
+comment_mt(const struct sk_buff *skb, const struct xt_match_param *par)
+{
+	/* We always match */
+	return true;
+}
+
+static struct xt_match comment_mt_reg __read_mostly = {
+	.name      = "comment",
+	.revision  = 0,
+	.family    = NFPROTO_UNSPEC,
+	.match     = comment_mt,
+	.matchsize = sizeof(struct xt_comment_info),
+	.me        = THIS_MODULE,
+};
+
+static int __init comment_mt_init(void)
+{
+	return xt_register_match(&comment_mt_reg);
+}
+
+static void __exit comment_mt_exit(void)
+{
+	xt_unregister_match(&comment_mt_reg);
+}
+
+module_init(comment_mt_init);
+module_exit(comment_mt_exit);