// SPDX-License-Identifier: GPL-2.0-only/* * Copyright (c) 2006 Patrick McHardy <kaber@trash.net> */ #include <linux/module.h>#include <linux/init.h>#include <linux/skbuff.h> #include <linux/netfilter/x_tables.h>#include <linux/netfilter/xt_NFLOG.h>#include <net/netfilter/nf_log.h> MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");MODULE_DESCRIPTION("Xtables: packet logging to netlink using NFLOG");MODULE_LICENSE("GPL");MODULE_ALIAS("ipt_NFLOG");MODULE_ALIAS("ip6t_NFLOG"); static unsigned intnflog_tg(struct sk_buff *skb, const struct xt_action_param *par){	const struct xt_nflog_info *info = par->targinfo;	struct net *net = xt_net(par);	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;	li.u.ulog.flags	     = 0; 	if (info->flags & XT_NFLOG_F_COPY_LEN)		li.u.ulog.flags |= NF_LOG_F_COPY_LEN; 	nf_log_packet(net, xt_family(par), xt_hooknum(par), skb, xt_in(par),		      xt_out(par), &li, "%s", info->prefix); 	return XT_CONTINUE;} static int nflog_tg_check(const struct xt_tgchk_param *par){	const struct xt_nflog_info *info = par->targinfo;	int ret; 	if (info->flags & ~XT_NFLOG_MASK)		return -EINVAL;	if (info->prefix[sizeof(info->prefix) - 1] != '\0')		return -EINVAL; 	ret = nf_logger_find_get(par->family, NF_LOG_TYPE_ULOG);	if (ret != 0 && !par->nft_compat) {		request_module("%s", "nfnetlink_log"); 		ret = nf_logger_find_get(par->family, NF_LOG_TYPE_ULOG);	} 	return ret;} static void nflog_tg_destroy(const struct xt_tgdtor_param *par){	nf_logger_put(par->family, NF_LOG_TYPE_ULOG);} static struct xt_target nflog_tg_reg[] __read_mostly = {	{		.name       = "NFLOG",		.revision   = 0,		.family     = NFPROTO_IPV4,		.checkentry = nflog_tg_check,		.destroy    = nflog_tg_destroy,		.target     = nflog_tg,		.targetsize = sizeof(struct xt_nflog_info),		.me         = THIS_MODULE,	},#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)	{		.name       = "NFLOG",		.revision   = 0,		.family     = NFPROTO_IPV6,		.checkentry = nflog_tg_check,		.destroy    = nflog_tg_destroy,		.target     = nflog_tg,		.targetsize = sizeof(struct xt_nflog_info),		.me         = THIS_MODULE,	},#endif}; static int __init nflog_tg_init(void){	return xt_register_targets(nflog_tg_reg, ARRAY_SIZE(nflog_tg_reg));} static void __exit nflog_tg_exit(void){	xt_unregister_targets(nflog_tg_reg, ARRAY_SIZE(nflog_tg_reg));} module_init(nflog_tg_init);module_exit(nflog_tg_exit);MODULE_SOFTDEP("pre: nfnetlink_log");