cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ebt_nflog.c (1871B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * ebt_nflog
      4 *
      5 *	Author:
      6 *	Peter Warasin <peter@endian.com>
      7 *
      8 *  February, 2008
      9 *
     10 * Based on:
     11 *  xt_NFLOG.c, (C) 2006 by Patrick McHardy <kaber@trash.net>
     12 *  ebt_ulog.c, (C) 2004 by Bart De Schuymer <bdschuym@pandora.be>
     13 *
     14 */
     15
     16#include <linux/module.h>
     17#include <linux/spinlock.h>
     18#include <linux/netfilter/x_tables.h>
     19#include <linux/netfilter_bridge/ebtables.h>
     20#include <linux/netfilter_bridge/ebt_nflog.h>
     21#include <net/netfilter/nf_log.h>
     22
     23static unsigned int
     24ebt_nflog_tg(struct sk_buff *skb, const struct xt_action_param *par)
     25{
     26	const struct ebt_nflog_info *info = par->targinfo;
     27	struct net *net = xt_net(par);
     28	struct nf_loginfo li;
     29
     30	li.type = NF_LOG_TYPE_ULOG;
     31	li.u.ulog.copy_len = info->len;
     32	li.u.ulog.group = info->group;
     33	li.u.ulog.qthreshold = info->threshold;
     34	li.u.ulog.flags = 0;
     35
     36	nf_log_packet(net, PF_BRIDGE, xt_hooknum(par), skb, xt_in(par),
     37		      xt_out(par), &li, "%s", info->prefix);
     38	return EBT_CONTINUE;
     39}
     40
     41static int ebt_nflog_tg_check(const struct xt_tgchk_param *par)
     42{
     43	struct ebt_nflog_info *info = par->targinfo;
     44
     45	if (info->flags & ~EBT_NFLOG_MASK)
     46		return -EINVAL;
     47	info->prefix[EBT_NFLOG_PREFIX_SIZE - 1] = '\0';
     48	return 0;
     49}
     50
     51static struct xt_target ebt_nflog_tg_reg __read_mostly = {
     52	.name       = "nflog",
     53	.revision   = 0,
     54	.family     = NFPROTO_BRIDGE,
     55	.target     = ebt_nflog_tg,
     56	.checkentry = ebt_nflog_tg_check,
     57	.targetsize = sizeof(struct ebt_nflog_info),
     58	.me         = THIS_MODULE,
     59};
     60
     61static int __init ebt_nflog_init(void)
     62{
     63	return xt_register_target(&ebt_nflog_tg_reg);
     64}
     65
     66static void __exit ebt_nflog_fini(void)
     67{
     68	xt_unregister_target(&ebt_nflog_tg_reg);
     69}
     70
     71module_init(ebt_nflog_init);
     72module_exit(ebt_nflog_fini);
     73MODULE_LICENSE("GPL");
     74MODULE_AUTHOR("Peter Warasin <peter@endian.com>");
     75MODULE_DESCRIPTION("ebtables NFLOG netfilter logging module");