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 16MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); 17MODULE_DESCRIPTION("x_tables NFLOG target"); 18MODULE_LICENSE("GPL"); 19MODULE_ALIAS("ipt_NFLOG"); 20MODULE_ALIAS("ip6t_NFLOG"); 21 22static unsigned int 23nflog_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 41static int 42nflog_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 55static 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 74static int __init xt_nflog_init(void) 75{ 76 return xt_register_targets(xt_nflog_target, 77 ARRAY_SIZE(xt_nflog_target)); 78} 79 80static void __exit xt_nflog_fini(void) 81{ 82 xt_unregister_targets(xt_nflog_target, ARRAY_SIZE(xt_nflog_target)); 83} 84 85module_init(xt_nflog_init); 86module_exit(xt_nflog_fini); 87