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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> | |
15 | ||
16 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
17 | MODULE_DESCRIPTION("x_tables NFLOG target"); | |
18 | MODULE_LICENSE("GPL"); | |
19 | MODULE_ALIAS("ipt_NFLOG"); | |
20 | MODULE_ALIAS("ip6t_NFLOG"); | |
21 | ||
22 | static unsigned int | |
23 | nflog_target(struct sk_buff **pskb, | |
24 | const struct net_device *in, const struct net_device *out, | |
25 | unsigned int hooknum, const struct xt_target *target, | |
26 | const void *targinfo) | |
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 | ||
36 | nf_log_packet(target->family, hooknum, *pskb, in, out, &li, | |
37 | "%s", info->prefix); | |
38 | return XT_CONTINUE; | |
39 | } | |
40 | ||
41 | static int | |
42 | nflog_checkentry(const char *tablename, const void *entry, | |
43 | const struct xt_target *target, void *targetinfo, | |
44 | unsigned int hookmask) | |
45 | { | |
46 | struct xt_nflog_info *info = targetinfo; | |
47 | ||
48 | if (info->flags & ~XT_NFLOG_MASK) | |
49 | return 0; | |
50 | if (info->prefix[sizeof(info->prefix) - 1] != '\0') | |
51 | return 0; | |
52 | return 1; | |
53 | } | |
54 | ||
55 | static struct xt_target xt_nflog_target[] = { | |
56 | { | |
57 | .name = "NFLOG", | |
58 | .family = AF_INET, | |
59 | .checkentry = nflog_checkentry, | |
60 | .target = nflog_target, | |
61 | .targetsize = sizeof(struct xt_nflog_info), | |
62 | .me = THIS_MODULE, | |
63 | }, | |
64 | { | |
65 | .name = "NFLOG", | |
66 | .family = AF_INET6, | |
67 | .checkentry = nflog_checkentry, | |
68 | .target = nflog_target, | |
69 | .targetsize = sizeof(struct xt_nflog_info), | |
70 | .me = THIS_MODULE, | |
71 | }, | |
72 | }; | |
73 | ||
74 | static int __init xt_nflog_init(void) | |
75 | { | |
76 | return xt_register_targets(xt_nflog_target, | |
77 | ARRAY_SIZE(xt_nflog_target)); | |
78 | } | |
79 | ||
80 | static void __exit xt_nflog_fini(void) | |
81 | { | |
82 | xt_unregister_targets(xt_nflog_target, ARRAY_SIZE(xt_nflog_target)); | |
83 | } | |
84 | ||
85 | module_init(xt_nflog_init); | |
86 | module_exit(xt_nflog_fini); |