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 net *net = xt_net(par); 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 li.u.ulog.flags = 0; 34 35 nf_log_packet(net, PF_BRIDGE, xt_hooknum(par), skb, xt_in(par), 36 xt_out(par), &li, "%s", info->prefix); 37 return EBT_CONTINUE; 38 } 39 40 static int ebt_nflog_tg_check(const struct xt_tgchk_param *par) 41 { 42 struct ebt_nflog_info *info = par->targinfo; 43 44 if (info->flags & ~EBT_NFLOG_MASK) 45 return -EINVAL; 46 info->prefix[EBT_NFLOG_PREFIX_SIZE - 1] = '\0'; 47 return 0; 48 } 49 50 static struct xt_target ebt_nflog_tg_reg __read_mostly = { 51 .name = "nflog", 52 .revision = 0, 53 .family = NFPROTO_BRIDGE, 54 .target = ebt_nflog_tg, 55 .checkentry = ebt_nflog_tg_check, 56 .targetsize = sizeof(struct ebt_nflog_info), 57 .me = THIS_MODULE, 58 }; 59 60 static int __init ebt_nflog_init(void) 61 { 62 return xt_register_target(&ebt_nflog_tg_reg); 63 } 64 65 static void __exit ebt_nflog_fini(void) 66 { 67 xt_unregister_target(&ebt_nflog_tg_reg); 68 } 69 70 module_init(ebt_nflog_init); 71 module_exit(ebt_nflog_fini); 72 MODULE_LICENSE("GPL"); 73 MODULE_AUTHOR("Peter Warasin <peter@endian.com>"); 74 MODULE_DESCRIPTION("ebtables NFLOG netfilter logging module"); 75