projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| ceb98d03 PNA |
1 | /* |
| 2 | * (C) 2011 Pablo Neira Ayuso <[email protected]> | |
| 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 <[email protected]>"); | |
| 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 | { | |
| 24 | const struct xt_nfacct_match_info *info = par->targinfo; | |
| 25 | ||
| 26 | nfnl_acct_update(skb, info->nfacct); | |
| 27 | ||
| 28 | return true; | |
| 29 | } | |
| 30 | ||
| 31 | static int | |
| 32 | nfacct_mt_checkentry(const struct xt_mtchk_param *par) | |
| 33 | { | |
| 34 | struct xt_nfacct_match_info *info = par->matchinfo; | |
| 35 | struct nf_acct *nfacct; | |
| 36 | ||
| 37 | nfacct = nfnl_acct_find_get(info->name); | |
| 38 | if (nfacct == NULL) { | |
| 39 | pr_info("xt_nfacct: accounting object with name `%s' " | |
| 40 | "does not exists\n", info->name); | |
| 41 | return -ENOENT; | |
| 42 | } | |
| 43 | info->nfacct = nfacct; | |
| 44 | return 0; | |
| 45 | } | |
| 46 | ||
| 47 | static void | |
| 48 | nfacct_mt_destroy(const struct xt_mtdtor_param *par) | |
| 49 | { | |
| 50 | const struct xt_nfacct_match_info *info = par->matchinfo; | |
| 51 | ||
| 52 | nfnl_acct_put(info->nfacct); | |
| 53 | } | |
| 54 | ||
| 55 | static struct xt_match nfacct_mt_reg __read_mostly = { | |
| 56 | .name = "nfacct", | |
| 57 | .family = NFPROTO_UNSPEC, | |
| 58 | .checkentry = nfacct_mt_checkentry, | |
| 59 | .match = nfacct_mt, | |
| 60 | .destroy = nfacct_mt_destroy, | |
| 61 | .matchsize = sizeof(struct xt_nfacct_match_info), | |
| 62 | .me = THIS_MODULE, | |
| 63 | }; | |
| 64 | ||
| 65 | static int __init nfacct_mt_init(void) | |
| 66 | { | |
| 67 | return xt_register_match(&nfacct_mt_reg); | |
| 68 | } | |
| 69 | ||
| 70 | static void __exit nfacct_mt_exit(void) | |
| 71 | { | |
| 72 | xt_unregister_match(&nfacct_mt_reg); | |
| 73 | } | |
| 74 | ||
| 75 | module_init(nfacct_mt_init); | |
| 76 | module_exit(nfacct_mt_exit); |