![Thomas Gleixner](/assets/img/avatar_default.png)
Add SPDX license identifiers to all files which: - Have no license information of any form - Have MODULE_LICENCE("GPL*") inside which was used in the initial scan/conversion to ignore the file These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ebt_mark_m
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*
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* Authors:
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* Bart De Schuymer <bdschuym@pandora.be>
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*
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* July, 2002
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*
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*/
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#include <linux/module.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_mark_m.h>
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static bool
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ebt_mark_mt(const struct sk_buff *skb, struct xt_action_param *par)
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{
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const struct ebt_mark_m_info *info = par->matchinfo;
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if (info->bitmask & EBT_MARK_OR)
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return !!(skb->mark & info->mask) ^ info->invert;
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return ((skb->mark & info->mask) == info->mark) ^ info->invert;
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}
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static int ebt_mark_mt_check(const struct xt_mtchk_param *par)
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{
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const struct ebt_mark_m_info *info = par->matchinfo;
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if (info->bitmask & ~EBT_MARK_MASK)
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return -EINVAL;
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if ((info->bitmask & EBT_MARK_OR) && (info->bitmask & EBT_MARK_AND))
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return -EINVAL;
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if (!info->bitmask)
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return -EINVAL;
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return 0;
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}
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#ifdef CONFIG_COMPAT
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struct compat_ebt_mark_m_info {
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compat_ulong_t mark, mask;
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uint8_t invert, bitmask;
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};
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static void mark_mt_compat_from_user(void *dst, const void *src)
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{
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const struct compat_ebt_mark_m_info *user = src;
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struct ebt_mark_m_info *kern = dst;
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kern->mark = user->mark;
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kern->mask = user->mask;
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kern->invert = user->invert;
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kern->bitmask = user->bitmask;
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}
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static int mark_mt_compat_to_user(void __user *dst, const void *src)
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{
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struct compat_ebt_mark_m_info __user *user = dst;
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const struct ebt_mark_m_info *kern = src;
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if (put_user(kern->mark, &user->mark) ||
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put_user(kern->mask, &user->mask) ||
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put_user(kern->invert, &user->invert) ||
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put_user(kern->bitmask, &user->bitmask))
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return -EFAULT;
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return 0;
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}
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#endif
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static struct xt_match ebt_mark_mt_reg __read_mostly = {
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.name = "mark_m",
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.revision = 0,
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.family = NFPROTO_BRIDGE,
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.match = ebt_mark_mt,
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.checkentry = ebt_mark_mt_check,
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.matchsize = sizeof(struct ebt_mark_m_info),
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#ifdef CONFIG_COMPAT
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.compatsize = sizeof(struct compat_ebt_mark_m_info),
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.compat_from_user = mark_mt_compat_from_user,
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.compat_to_user = mark_mt_compat_to_user,
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#endif
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.me = THIS_MODULE,
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};
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static int __init ebt_mark_m_init(void)
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{
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return xt_register_match(&ebt_mark_mt_reg);
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}
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static void __exit ebt_mark_m_fini(void)
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{
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xt_unregister_match(&ebt_mark_mt_reg);
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}
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module_init(ebt_mark_m_init);
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module_exit(ebt_mark_m_fini);
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MODULE_DESCRIPTION("Ebtables: Packet mark match");
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MODULE_LICENSE("GPL");
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