// SPDX-License-Identifier: GPL-2.0-only
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/*
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* xt_mark - Netfilter module to match NFMARK value
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*
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* (C) 1999-2001 Marc Boucher <marc@mbsi.ca>
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* Copyright © CC Computer Consultants GmbH, 2007 - 2008
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* Jan Engelhardt <jengelh@medozas.de>
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*/
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/netfilter/xt_mark.h>
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#include <linux/netfilter/x_tables.h>
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
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MODULE_DESCRIPTION("Xtables: packet mark operations");
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MODULE_ALIAS("ipt_mark");
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MODULE_ALIAS("ip6t_mark");
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MODULE_ALIAS("ipt_MARK");
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MODULE_ALIAS("ip6t_MARK");
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MODULE_ALIAS("arpt_MARK");
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static unsigned int
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mark_tg(struct sk_buff *skb, const struct xt_action_param *par)
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{
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const struct xt_mark_tginfo2 *info = par->targinfo;
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skb->mark = (skb->mark & ~info->mask) ^ info->mark;
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return XT_CONTINUE;
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}
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static bool
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mark_mt(const struct sk_buff *skb, struct xt_action_param *par)
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{
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const struct xt_mark_mtinfo1 *info = par->matchinfo;
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return ((skb->mark & info->mask) == info->mark) ^ info->invert;
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}
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static struct xt_target mark_tg_reg __read_mostly = {
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.name = "MARK",
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.revision = 2,
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.family = NFPROTO_UNSPEC,
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.target = mark_tg,
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.targetsize = sizeof(struct xt_mark_tginfo2),
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.me = THIS_MODULE,
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};
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static struct xt_match mark_mt_reg __read_mostly = {
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.name = "mark",
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.revision = 1,
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.family = NFPROTO_UNSPEC,
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.match = mark_mt,
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.matchsize = sizeof(struct xt_mark_mtinfo1),
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.me = THIS_MODULE,
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};
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static int __init mark_mt_init(void)
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{
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int ret;
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ret = xt_register_target(&mark_tg_reg);
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if (ret < 0)
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return ret;
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ret = xt_register_match(&mark_mt_reg);
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if (ret < 0) {
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xt_unregister_target(&mark_tg_reg);
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return ret;
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}
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return 0;
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}
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static void __exit mark_mt_exit(void)
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{
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xt_unregister_match(&mark_mt_reg);
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xt_unregister_target(&mark_tg_reg);
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}
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module_init(mark_mt_init);
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module_exit(mark_mt_exit);
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