From ceb98d03eac5704820f2ac1f370c9ff385e3a9f5 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Fri, 23 Dec 2011 14:28:59 +0100 Subject: netfilter: xtables: add nfacct match to support extended accounting This patch adds the match that allows to perform extended accounting. It requires the new nfnetlink_acct infrastructure. # iptables -I INPUT -p tcp --sport 80 -m nfacct --nfacct-name http-traffic # iptables -I OUTPUT -p tcp --dport 80 -m nfacct --nfacct-name http-traffic Signed-off-by: Pablo Neira Ayuso --- net/netfilter/xt_nfacct.c | 76 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 net/netfilter/xt_nfacct.c (limited to 'net/netfilter/xt_nfacct.c') diff --git a/net/netfilter/xt_nfacct.c b/net/netfilter/xt_nfacct.c new file mode 100644 index 000000000000..b3be0ef21f19 --- /dev/null +++ b/net/netfilter/xt_nfacct.c @@ -0,0 +1,76 @@ +/* + * (C) 2011 Pablo Neira Ayuso + * (C) 2011 Intra2net AG + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 (or any + * later at your option) as published by the Free Software Foundation. + */ +#include +#include + +#include +#include +#include + +MODULE_AUTHOR("Pablo Neira Ayuso "); +MODULE_DESCRIPTION("Xtables: match for the extended accounting infrastructure"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("ipt_nfacct"); +MODULE_ALIAS("ip6t_nfacct"); + +static bool nfacct_mt(const struct sk_buff *skb, struct xt_action_param *par) +{ + const struct xt_nfacct_match_info *info = par->targinfo; + + nfnl_acct_update(skb, info->nfacct); + + return true; +} + +static int +nfacct_mt_checkentry(const struct xt_mtchk_param *par) +{ + struct xt_nfacct_match_info *info = par->matchinfo; + struct nf_acct *nfacct; + + nfacct = nfnl_acct_find_get(info->name); + if (nfacct == NULL) { + pr_info("xt_nfacct: accounting object with name `%s' " + "does not exists\n", info->name); + return -ENOENT; + } + info->nfacct = nfacct; + return 0; +} + +static void +nfacct_mt_destroy(const struct xt_mtdtor_param *par) +{ + const struct xt_nfacct_match_info *info = par->matchinfo; + + nfnl_acct_put(info->nfacct); +} + +static struct xt_match nfacct_mt_reg __read_mostly = { + .name = "nfacct", + .family = NFPROTO_UNSPEC, + .checkentry = nfacct_mt_checkentry, + .match = nfacct_mt, + .destroy = nfacct_mt_destroy, + .matchsize = sizeof(struct xt_nfacct_match_info), + .me = THIS_MODULE, +}; + +static int __init nfacct_mt_init(void) +{ + return xt_register_match(&nfacct_mt_reg); +} + +static void __exit nfacct_mt_exit(void) +{ + xt_unregister_match(&nfacct_mt_reg); +} + +module_init(nfacct_mt_init); +module_exit(nfacct_mt_exit); -- cgit v1.2.1