LXR linux/net/bridge/netfilter/ebt

   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_target_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 bool 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 false;
  44        info->prefix[EBT_NFLOG_PREFIX_SIZE - 1] = '\0';
  45        return true;
  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 = XT_ALIGN(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