projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| ceb98d03 PNA |
1 | /* |
| 2 | * (C) 2011 Pablo Neira Ayuso <pablo@netfilter.org> | |
| 3 | * (C) 2011 Intra2net AG <http://www.intra2net.com> | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License version 2 (or any | |
| 7 | * later at your option) as published by the Free Software Foundation. | |
| 8 | */ | |
| 9 | #include <linux/module.h> | |
| 10 | #include <linux/skbuff.h> | |
| 11 | ||
| 12 | #include <linux/netfilter/x_tables.h> | |
| 13 | #include <linux/netfilter/nfnetlink_acct.h> | |
| 14 | #include <linux/netfilter/xt_nfacct.h> | |
| 15 | ||
| 16 | MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>"); | |
| 17 | MODULE_DESCRIPTION("Xtables: match for the extended accounting infrastructure"); | |
| 18 | MODULE_LICENSE("GPL"); | |
| 19 | MODULE_ALIAS("ipt_nfacct"); | |
| 20 | MODULE_ALIAS("ip6t_nfacct"); | |
| 21 | ||
| 22 | static bool nfacct_mt(const struct sk_buff *skb, struct xt_action_param *par) | |
| 23 | { | |
| 683399ed | 24 | int overquota; |
| ceb98d03 PNA |
25 | const struct xt_nfacct_match_info *info = par->targinfo; |
| 26 | ||
| 27 | nfnl_acct_update(skb, info->nfacct); | |
| 28 | ||
| 683399ed MP |
29 | overquota = nfnl_acct_overquota(skb, info->nfacct); |
| 30 | ||
| 31 | return overquota == NFACCT_UNDERQUOTA ? false : true; | |
| ceb98d03 PNA |
32 | } |
| 33 | ||
| 34 | static int | |
| 35 | nfacct_mt_checkentry(const struct xt_mtchk_param *par) | |
| 36 | { | |
| 37 | struct xt_nfacct_match_info *info = par->matchinfo; | |
| 38 | struct nf_acct *nfacct; | |
| 39 | ||
| 40 | nfacct = nfnl_acct_find_get(info->name); | |
| 41 | if (nfacct == NULL) { | |
| 42 | pr_info("xt_nfacct: accounting object with name `%s' " | |
| 43 | "does not exists\n", info->name); | |
| 44 | return -ENOENT; | |
| 45 | } | |
| 46 | info->nfacct = nfacct; | |
| 47 | return 0; | |
| 48 | } | |
| 49 | ||
| 50 | static void | |
| 51 | nfacct_mt_destroy(const struct xt_mtdtor_param *par) | |
| 52 | { | |
| 53 | const struct xt_nfacct_match_info *info = par->matchinfo; | |
| 54 | ||
| 55 | nfnl_acct_put(info->nfacct); | |
| 56 | } | |
| 57 | ||
| 58 | static struct xt_match nfacct_mt_reg __read_mostly = { | |
| 59 | .name = "nfacct", | |
| 60 | .family = NFPROTO_UNSPEC, | |
| 61 | .checkentry = nfacct_mt_checkentry, | |
| 62 | .match = nfacct_mt, | |
| 63 | .destroy = nfacct_mt_destroy, | |
| 64 | .matchsize = sizeof(struct xt_nfacct_match_info), | |
| 65 | .me = THIS_MODULE, | |
| 66 | }; | |
| 67 | ||
| 68 | static int __init nfacct_mt_init(void) | |
| 69 | { | |
| 70 | return xt_register_match(&nfacct_mt_reg); | |
| 71 | } | |
| 72 | ||
| 73 | static void __exit nfacct_mt_exit(void) | |
| 74 | { | |
| 75 | xt_unregister_match(&nfacct_mt_reg); | |
| 76 | } | |
| 77 | ||
| 78 | module_init(nfacct_mt_init); | |
| 79 | module_exit(nfacct_mt_exit); |