| /* |
| * ebt_nflog |
| * |
| * Author: |
| * Peter Warasin <peter@endian.com> |
| * |
| * February, 2008 |
| * |
| * Based on: |
| * xt_NFLOG.c, (C) 2006 by Patrick McHardy <kaber@trash.net> |
| * ebt_ulog.c, (C) 2004 by Bart De Schuymer <bdschuym@pandora.be> |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/spinlock.h> |
| #include <linux/netfilter_bridge/ebtables.h> |
| #include <linux/netfilter_bridge/ebt_nflog.h> |
| #include <net/netfilter/nf_log.h> |
| |
| static void ebt_nflog(const struct sk_buff *skb, |
| unsigned int hooknr, |
| const struct net_device *in, |
| const struct net_device *out, |
| const void *data, unsigned int datalen) |
| { |
| struct ebt_nflog_info *info = (struct ebt_nflog_info *)data; |
| struct nf_loginfo li; |
| |
| li.type = NF_LOG_TYPE_ULOG; |
| li.u.ulog.copy_len = info->len; |
| li.u.ulog.group = info->group; |
| li.u.ulog.qthreshold = info->threshold; |
| |
| nf_log_packet(PF_BRIDGE, hooknr, skb, in, out, &li, "%s", info->prefix); |
| } |
| |
| static int ebt_nflog_check(const char *tablename, |
| unsigned int hookmask, |
| const struct ebt_entry *e, |
| void *data, unsigned int datalen) |
| { |
| struct ebt_nflog_info *info = (struct ebt_nflog_info *)data; |
| |
| if (datalen != EBT_ALIGN(sizeof(struct ebt_nflog_info))) |
| return -EINVAL; |
| if (info->flags & ~EBT_NFLOG_MASK) |
| return -EINVAL; |
| info->prefix[EBT_NFLOG_PREFIX_SIZE - 1] = '\0'; |
| return 0; |
| } |
| |
| static struct ebt_watcher nflog __read_mostly = { |
| .name = EBT_NFLOG_WATCHER, |
| .watcher = ebt_nflog, |
| .check = ebt_nflog_check, |
| .me = THIS_MODULE, |
| }; |
| |
| static int __init ebt_nflog_init(void) |
| { |
| return ebt_register_watcher(&nflog); |
| } |
| |
| static void __exit ebt_nflog_fini(void) |
| { |
| ebt_unregister_watcher(&nflog); |
| } |
| |
| module_init(ebt_nflog_init); |
| module_exit(ebt_nflog_fini); |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Peter Warasin <peter@endian.com>"); |
| MODULE_DESCRIPTION("ebtables NFLOG netfilter logging module"); |