Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 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 |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 23 | nflog_target(struct sk_buff *skb, |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 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 | |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 36 | nf_log_packet(target->family, hooknum, skb, in, out, &li, |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 37 | "%s", info->prefix); |
| 38 | return XT_CONTINUE; |
| 39 | } |
| 40 | |
Jan Engelhardt | e1931b7 | 2007-07-07 22:16:26 -0700 | [diff] [blame] | 41 | static bool |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 42 | nflog_checkentry(const char *tablename, const void *entry, |
| 43 | const struct xt_target *target, void *targetinfo, |
| 44 | unsigned int hookmask) |
| 45 | { |
Jan Engelhardt | a47362a | 2007-07-07 22:16:55 -0700 | [diff] [blame] | 46 | const struct xt_nflog_info *info = targetinfo; |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 47 | |
| 48 | if (info->flags & ~XT_NFLOG_MASK) |
Jan Engelhardt | e1931b7 | 2007-07-07 22:16:26 -0700 | [diff] [blame] | 49 | return false; |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 50 | if (info->prefix[sizeof(info->prefix) - 1] != '\0') |
Jan Engelhardt | e1931b7 | 2007-07-07 22:16:26 -0700 | [diff] [blame] | 51 | return false; |
| 52 | return true; |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 53 | } |
| 54 | |
Patrick McHardy | 9f15c53 | 2007-07-07 22:22:02 -0700 | [diff] [blame] | 55 | static struct xt_target xt_nflog_target[] __read_mostly = { |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 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); |