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> |
Patrick McHardy | f01ffbd | 2007-12-17 22:38:49 -0800 | [diff] [blame] | 15 | #include <net/netfilter/nf_log.h> |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 16 | |
| 17 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); |
Jan Engelhardt | 2ae15b6 | 2008-01-14 23:42:28 -0800 | [diff] [blame] | 18 | MODULE_DESCRIPTION("Xtables: packet logging to netlink using NFLOG"); |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 19 | MODULE_LICENSE("GPL"); |
| 20 | MODULE_ALIAS("ipt_NFLOG"); |
| 21 | MODULE_ALIAS("ip6t_NFLOG"); |
| 22 | |
| 23 | static unsigned int |
Jan Engelhardt | 7eb3558 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 24 | nflog_tg(struct sk_buff *skb, const struct xt_target_param *par) |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 25 | { |
Jan Engelhardt | 7eb3558 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 26 | const struct xt_nflog_info *info = par->targinfo; |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 27 | struct nf_loginfo li; |
| 28 | |
| 29 | li.type = NF_LOG_TYPE_ULOG; |
| 30 | li.u.ulog.copy_len = info->len; |
| 31 | li.u.ulog.group = info->group; |
| 32 | li.u.ulog.qthreshold = info->threshold; |
| 33 | |
Jan Engelhardt | 7eb3558 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 34 | nf_log_packet(par->target->family, par->hooknum, skb, par->in, |
| 35 | par->out, &li, "%s", info->prefix); |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 36 | return XT_CONTINUE; |
| 37 | } |
| 38 | |
Jan Engelhardt | af5d6dc | 2008-10-08 11:35:19 +0200 | [diff] [blame^] | 39 | static bool nflog_tg_check(const struct xt_tgchk_param *par) |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 40 | { |
Jan Engelhardt | af5d6dc | 2008-10-08 11:35:19 +0200 | [diff] [blame^] | 41 | const struct xt_nflog_info *info = par->targinfo; |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 42 | |
| 43 | if (info->flags & ~XT_NFLOG_MASK) |
Jan Engelhardt | e1931b7 | 2007-07-07 22:16:26 -0700 | [diff] [blame] | 44 | return false; |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 45 | if (info->prefix[sizeof(info->prefix) - 1] != '\0') |
Jan Engelhardt | e1931b7 | 2007-07-07 22:16:26 -0700 | [diff] [blame] | 46 | return false; |
| 47 | return true; |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 48 | } |
| 49 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 50 | static struct xt_target nflog_tg_reg[] __read_mostly = { |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 51 | { |
| 52 | .name = "NFLOG", |
Jan Engelhardt | ee999d8 | 2008-10-08 11:35:01 +0200 | [diff] [blame] | 53 | .family = NFPROTO_IPV4, |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 54 | .checkentry = nflog_tg_check, |
| 55 | .target = nflog_tg, |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 56 | .targetsize = sizeof(struct xt_nflog_info), |
| 57 | .me = THIS_MODULE, |
| 58 | }, |
| 59 | { |
| 60 | .name = "NFLOG", |
Jan Engelhardt | ee999d8 | 2008-10-08 11:35:01 +0200 | [diff] [blame] | 61 | .family = NFPROTO_IPV6, |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 62 | .checkentry = nflog_tg_check, |
| 63 | .target = nflog_tg, |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 64 | .targetsize = sizeof(struct xt_nflog_info), |
| 65 | .me = THIS_MODULE, |
| 66 | }, |
| 67 | }; |
| 68 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 69 | static int __init nflog_tg_init(void) |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 70 | { |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 71 | return xt_register_targets(nflog_tg_reg, ARRAY_SIZE(nflog_tg_reg)); |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 72 | } |
| 73 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 74 | static void __exit nflog_tg_exit(void) |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 75 | { |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 76 | xt_unregister_targets(nflog_tg_reg, ARRAY_SIZE(nflog_tg_reg)); |
Patrick McHardy | baf7b1e | 2006-11-29 02:35:38 +0100 | [diff] [blame] | 77 | } |
| 78 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 79 | module_init(nflog_tg_init); |
| 80 | module_exit(nflog_tg_exit); |