1/* 2 * ebt_nflog 3 * 4 * Author: 5 * Peter Warasin <peter@endian.com> 6 * 7 * February, 2008 8 * 9 * Based on: 10 * xt_NFLOG.c, (C) 2006 by Patrick McHardy <kaber@trash.net> 11 * ebt_ulog.c, (C) 2004 by Bart De Schuymer <bdschuym@pandora.be> 12 * 13 */ 14 15#include <linux/module.h> 16#include <linux/spinlock.h> 17#include <linux/netfilter/x_tables.h> 18#include <linux/netfilter_bridge/ebtables.h> 19#include <linux/netfilter_bridge/ebt_nflog.h> 20#include <net/netfilter/nf_log.h> 21 22static unsigned int 23ebt_nflog_tg(struct sk_buff *skb, const struct xt_action_param *par) 24{ 25 const struct ebt_nflog_info *info = par->targinfo; 26 struct nf_loginfo li; 27 28 li.type = NF_LOG_TYPE_ULOG; 29 li.u.ulog.copy_len = info->len; 30 li.u.ulog.group = info->group; 31 li.u.ulog.qthreshold = info->threshold; 32 33 nf_log_packet(PF_BRIDGE, par->hooknum, skb, par->in, par->out, 34 &li, "%s", info->prefix); 35 return EBT_CONTINUE; 36} 37 38static int ebt_nflog_tg_check(const struct xt_tgchk_param *par) 39{ 40 struct ebt_nflog_info *info = par->targinfo; 41 42 if (info->flags & ~EBT_NFLOG_MASK) 43 return -EINVAL; 44 info->prefix[EBT_NFLOG_PREFIX_SIZE - 1] = '\0'; 45 return 0; 46} 47 48static struct xt_target ebt_nflog_tg_reg __read_mostly = { 49 .name = "nflog", 50 .revision = 0, 51 .family = NFPROTO_BRIDGE, 52 .target = ebt_nflog_tg, 53 .checkentry = ebt_nflog_tg_check, 54 .targetsize = sizeof(struct ebt_nflog_info), 55 .me = THIS_MODULE, 56}; 57 58static int __init ebt_nflog_init(void) 59{ 60 return xt_register_target(&ebt_nflog_tg_reg); 61} 62 63static void __exit ebt_nflog_fini(void) 64{ 65 xt_unregister_target(&ebt_nflog_tg_reg); 66} 67 68module_init(ebt_nflog_init); 69module_exit(ebt_nflog_fini); 70MODULE_LICENSE("GPL"); 71MODULE_AUTHOR("Peter Warasin <peter@endian.com>"); 72MODULE_DESCRIPTION("ebtables NFLOG netfilter logging module"); 73