diff options
Diffstat (limited to 'net/netfilter/xt_comment.c')
-rw-r--r-- | net/netfilter/xt_comment.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/net/netfilter/xt_comment.c b/net/netfilter/xt_comment.c new file mode 100644 index 000000000..f095557e3 --- /dev/null +++ b/net/netfilter/xt_comment.c @@ -0,0 +1,46 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * 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, struct xt_action_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); |