// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ebt_nflog
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*
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* Author:
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* Peter Warasin <peter@endian.com>
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*
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* February, 2008
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*
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* Based on:
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* xt_NFLOG.c, (C) 2006 by Patrick McHardy <kaber@trash.net>
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* ebt_ulog.c, (C) 2004 by Bart De Schuymer <bdschuym@pandora.be>
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*
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*/
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include <linux/netfilter/x_tables.h>
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#include <linux/netfilter_bridge/ebtables.h>
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#include <linux/netfilter_bridge/ebt_nflog.h>
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#include <net/netfilter/nf_log.h>
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static unsigned int
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ebt_nflog_tg(struct sk_buff *skb, const struct xt_action_param *par)
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{
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const struct ebt_nflog_info *info = par->targinfo;
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struct net *net = xt_net(par);
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struct nf_loginfo li;
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li.type = NF_LOG_TYPE_ULOG;
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li.u.ulog.copy_len = info->len;
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li.u.ulog.group = info->group;
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li.u.ulog.qthreshold = info->threshold;
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li.u.ulog.flags = 0;
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nf_log_packet(net, PF_BRIDGE, xt_hooknum(par), skb, xt_in(par),
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xt_out(par), &li, "%s", info->prefix);
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return EBT_CONTINUE;
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}
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static int ebt_nflog_tg_check(const struct xt_tgchk_param *par)
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{
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struct ebt_nflog_info *info = par->targinfo;
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if (info->flags & ~EBT_NFLOG_MASK)
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return -EINVAL;
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info->prefix[EBT_NFLOG_PREFIX_SIZE - 1] = '\0';
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return 0;
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}
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static struct xt_target ebt_nflog_tg_reg __read_mostly = {
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.name = "nflog",
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.revision = 0,
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.family = NFPROTO_BRIDGE,
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.target = ebt_nflog_tg,
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.checkentry = ebt_nflog_tg_check,
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.targetsize = sizeof(struct ebt_nflog_info),
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.me = THIS_MODULE,
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};
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static int __init ebt_nflog_init(void)
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{
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return xt_register_target(&ebt_nflog_tg_reg);
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}
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static void __exit ebt_nflog_fini(void)
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{
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xt_unregister_target(&ebt_nflog_tg_reg);
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}
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module_init(ebt_nflog_init);
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module_exit(ebt_nflog_fini);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Peter Warasin <peter@endian.com>");
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MODULE_DESCRIPTION("ebtables NFLOG netfilter logging module");
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