]>
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 | ||
613dbd95 | 29 | overquota = nfnl_acct_overquota(xt_net(par), skb, info->nfacct); |
683399ed MP |
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 | ||
3499abb2 | 40 | nfacct = nfnl_acct_find_get(par->net, info->name); |
ceb98d03 PNA |
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); |