// SPDX-License-Identifier: GPL-2.0-only/* * This is a module which is used for setting the skb->priority field * of an skb for qdisc classification. */ /* (C) 2001-2002 Patrick McHardy <kaber@trash.net> */ #include <linux/module.h>#include <linux/skbuff.h>#include <linux/ip.h>#include <net/checksum.h> #include <linux/netfilter_ipv4.h>#include <linux/netfilter_ipv6.h>#include <linux/netfilter/x_tables.h>#include <linux/netfilter/xt_CLASSIFY.h>#include <linux/netfilter_arp.h> MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");MODULE_LICENSE("GPL");MODULE_DESCRIPTION("Xtables: Qdisc classification");MODULE_ALIAS("ipt_CLASSIFY");MODULE_ALIAS("ip6t_CLASSIFY");MODULE_ALIAS("arpt_CLASSIFY"); static unsigned intclassify_tg(struct sk_buff *skb, const struct xt_action_param *par){	const struct xt_classify_target_info *clinfo = par->targinfo; 	skb->priority = clinfo->priority;	return XT_CONTINUE;} static struct xt_target classify_tg_reg[] __read_mostly = {	{		.name       = "CLASSIFY",		.revision   = 0,		.family     = NFPROTO_IPV4,		.hooks      = (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_FORWARD) |			      (1 << NF_INET_POST_ROUTING),		.target     = classify_tg,		.targetsize = sizeof(struct xt_classify_target_info),		.me         = THIS_MODULE,	},	{		.name       = "CLASSIFY",		.revision   = 0,		.family     = NFPROTO_ARP,		.hooks      = (1 << NF_ARP_OUT) | (1 << NF_ARP_FORWARD),		.target     = classify_tg,		.targetsize = sizeof(struct xt_classify_target_info),		.me         = THIS_MODULE,	},#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)	{		.name       = "CLASSIFY",		.revision   = 0,		.family     = NFPROTO_IPV6,		.hooks      = (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_FORWARD) |			      (1 << NF_INET_POST_ROUTING),		.target     = classify_tg,		.targetsize = sizeof(struct xt_classify_target_info),		.me         = THIS_MODULE,	},#endif}; static int __init classify_tg_init(void){	return xt_register_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg));} static void __exit classify_tg_exit(void){	xt_unregister_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg));} module_init(classify_tg_init);module_exit(classify_tg_exit);