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baf7b1e1 PM |
1 | /* |
2 | * Copyright (c) 2006 Patrick McHardy <kaber@trash.net> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | */ | |
8 | ||
9 | #include <linux/module.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/skbuff.h> | |
12 | ||
13 | #include <linux/netfilter/x_tables.h> | |
14 | #include <linux/netfilter/xt_NFLOG.h> | |
f01ffbd6 | 15 | #include <net/netfilter/nf_log.h> |
baf7b1e1 PM |
16 | |
17 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
18 | MODULE_DESCRIPTION("x_tables NFLOG target"); | |
19 | MODULE_LICENSE("GPL"); | |
20 | MODULE_ALIAS("ipt_NFLOG"); | |
21 | MODULE_ALIAS("ip6t_NFLOG"); | |
22 | ||
23 | static unsigned int | |
d3c5ee6d JE |
24 | nflog_tg(struct sk_buff *skb, const struct net_device *in, |
25 | const struct net_device *out, unsigned int hooknum, | |
26 | const struct xt_target *target, const void *targinfo) | |
baf7b1e1 PM |
27 | { |
28 | const struct xt_nflog_info *info = targinfo; | |
29 | struct nf_loginfo li; | |
30 | ||
31 | li.type = NF_LOG_TYPE_ULOG; | |
32 | li.u.ulog.copy_len = info->len; | |
33 | li.u.ulog.group = info->group; | |
34 | li.u.ulog.qthreshold = info->threshold; | |
35 | ||
3db05fea | 36 | nf_log_packet(target->family, hooknum, skb, in, out, &li, |
baf7b1e1 PM |
37 | "%s", info->prefix); |
38 | return XT_CONTINUE; | |
39 | } | |
40 | ||
e1931b78 | 41 | static bool |
d3c5ee6d JE |
42 | nflog_tg_check(const char *tablename, const void *entry, |
43 | const struct xt_target *target, void *targetinfo, | |
44 | unsigned int hookmask) | |
baf7b1e1 | 45 | { |
a47362a2 | 46 | const struct xt_nflog_info *info = targetinfo; |
baf7b1e1 PM |
47 | |
48 | if (info->flags & ~XT_NFLOG_MASK) | |
e1931b78 | 49 | return false; |
baf7b1e1 | 50 | if (info->prefix[sizeof(info->prefix) - 1] != '\0') |
e1931b78 JE |
51 | return false; |
52 | return true; | |
baf7b1e1 PM |
53 | } |
54 | ||
d3c5ee6d | 55 | static struct xt_target nflog_tg_reg[] __read_mostly = { |
baf7b1e1 PM |
56 | { |
57 | .name = "NFLOG", | |
58 | .family = AF_INET, | |
d3c5ee6d JE |
59 | .checkentry = nflog_tg_check, |
60 | .target = nflog_tg, | |
baf7b1e1 PM |
61 | .targetsize = sizeof(struct xt_nflog_info), |
62 | .me = THIS_MODULE, | |
63 | }, | |
64 | { | |
65 | .name = "NFLOG", | |
66 | .family = AF_INET6, | |
d3c5ee6d JE |
67 | .checkentry = nflog_tg_check, |
68 | .target = nflog_tg, | |
baf7b1e1 PM |
69 | .targetsize = sizeof(struct xt_nflog_info), |
70 | .me = THIS_MODULE, | |
71 | }, | |
72 | }; | |
73 | ||
d3c5ee6d | 74 | static int __init nflog_tg_init(void) |
baf7b1e1 | 75 | { |
d3c5ee6d | 76 | return xt_register_targets(nflog_tg_reg, ARRAY_SIZE(nflog_tg_reg)); |
baf7b1e1 PM |
77 | } |
78 | ||
d3c5ee6d | 79 | static void __exit nflog_tg_exit(void) |
baf7b1e1 | 80 | { |
d3c5ee6d | 81 | xt_unregister_targets(nflog_tg_reg, ARRAY_SIZE(nflog_tg_reg)); |
baf7b1e1 PM |
82 | } |
83 | ||
d3c5ee6d JE |
84 | module_init(nflog_tg_init); |
85 | module_exit(nflog_tg_exit); |