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 22 static unsigned int 23 ebt_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 struct net *net = par->net; 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 34 nf_log_packet(net, PF_BRIDGE, par->hooknum, skb, par->in, 35 par->out, &li, "%s", info->prefix); 36 return EBT_CONTINUE; 37 } 38 39 static int ebt_nflog_tg_check(const struct xt_tgchk_param *par) 40 { 41 struct ebt_nflog_info *info = par->targinfo; 42 43 if (info->flags & ~EBT_NFLOG_MASK) 44 return -EINVAL; 45 info->prefix[EBT_NFLOG_PREFIX_SIZE - 1] = '\0'; 46 return 0; 47 } 48 49 static struct xt_target ebt_nflog_tg_reg __read_mostly = { 50 .name = "nflog", 51 .revision = 0, 52 .family = NFPROTO_BRIDGE, 53 .target = ebt_nflog_tg, 54 .checkentry = ebt_nflog_tg_check, 55 .targetsize = sizeof(struct ebt_nflog_info), 56 .me = THIS_MODULE, 57 }; 58 59 static int __init ebt_nflog_init(void) 60 { 61 return xt_register_target(&ebt_nflog_tg_reg); 62 } 63 64 static void __exit ebt_nflog_fini(void) 65 { 66 xt_unregister_target(&ebt_nflog_tg_reg); 67 } 68 69 module_init(ebt_nflog_init); 70 module_exit(ebt_nflog_fini); 71 MODULE_LICENSE("GPL"); 72 MODULE_AUTHOR("Peter Warasin <peter@endian.com>"); 73 MODULE_DESCRIPTION("ebtables NFLOG netfilter logging module"); 74