[NETFILTER]: nf_nat: pass manip type instead of hook to nf_nat_setup_info
[linux-2.6.git] / net / netfilter / xt_NFLOG.c
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_tg(struct sk_buff *skb, const struct net_device *in,
24          const struct net_device *out, unsigned int hooknum,
25          const struct xt_target *target, const void *targinfo)
26 {
27         const struct xt_nflog_info *info = targinfo;
28         struct nf_loginfo li;
29
30         li.type              = NF_LOG_TYPE_ULOG;
31         li.u.ulog.copy_len   = info->len;
32         li.u.ulog.group      = info->group;
33         li.u.ulog.qthreshold = info->threshold;
34
35         nf_log_packet(target->family, hooknum, skb, in, out, &li,
36                       "%s", info->prefix);
37         return XT_CONTINUE;
38 }
39
40 static bool
41 nflog_tg_check(const char *tablename, const void *entry,
42                const struct xt_target *target, void *targetinfo,
43                unsigned int hookmask)
44 {
45         const struct xt_nflog_info *info = targetinfo;
46
47         if (info->flags & ~XT_NFLOG_MASK)
48                 return false;
49         if (info->prefix[sizeof(info->prefix) - 1] != '\0')
50                 return false;
51         return true;
52 }
53
54 static struct xt_target nflog_tg_reg[] __read_mostly = {
55         {
56                 .name           = "NFLOG",
57                 .family         = AF_INET,
58                 .checkentry     = nflog_tg_check,
59                 .target         = nflog_tg,
60                 .targetsize     = sizeof(struct xt_nflog_info),
61                 .me             = THIS_MODULE,
62         },
63         {
64                 .name           = "NFLOG",
65                 .family         = AF_INET6,
66                 .checkentry     = nflog_tg_check,
67                 .target         = nflog_tg,
68                 .targetsize     = sizeof(struct xt_nflog_info),
69                 .me             = THIS_MODULE,
70         },
71 };
72
73 static int __init nflog_tg_init(void)
74 {
75         return xt_register_targets(nflog_tg_reg, ARRAY_SIZE(nflog_tg_reg));
76 }
77
78 static void __exit nflog_tg_exit(void)
79 {
80         xt_unregister_targets(nflog_tg_reg, ARRAY_SIZE(nflog_tg_reg));
81 }
82
83 module_init(nflog_tg_init);
84 module_exit(nflog_tg_exit);