1 // SPDX-License-Identifier: GPL-2.0-only
6 * Bart De Schuymer <bdschuym@pandora.be>
11 #include <linux/module.h>
12 #include <linux/netfilter/x_tables.h>
13 #include <linux/netfilter_bridge/ebtables.h>
14 #include <linux/netfilter_bridge/ebt_mark_m.h>
17 ebt_mark_mt(const struct sk_buff *skb, struct xt_action_param *par)
19 const struct ebt_mark_m_info *info = par->matchinfo;
21 if (info->bitmask & EBT_MARK_OR)
22 return !!(skb->mark & info->mask) ^ info->invert;
23 return ((skb->mark & info->mask) == info->mark) ^ info->invert;
26 static int ebt_mark_mt_check(const struct xt_mtchk_param *par)
28 const struct ebt_mark_m_info *info = par->matchinfo;
30 if (info->bitmask & ~EBT_MARK_MASK)
32 if ((info->bitmask & EBT_MARK_OR) && (info->bitmask & EBT_MARK_AND))
41 struct compat_ebt_mark_m_info {
42 compat_ulong_t mark, mask;
43 uint8_t invert, bitmask;
46 static void mark_mt_compat_from_user(void *dst, const void *src)
48 const struct compat_ebt_mark_m_info *user = src;
49 struct ebt_mark_m_info *kern = dst;
51 kern->mark = user->mark;
52 kern->mask = user->mask;
53 kern->invert = user->invert;
54 kern->bitmask = user->bitmask;
57 static int mark_mt_compat_to_user(void __user *dst, const void *src)
59 struct compat_ebt_mark_m_info __user *user = dst;
60 const struct ebt_mark_m_info *kern = src;
62 if (put_user(kern->mark, &user->mark) ||
63 put_user(kern->mask, &user->mask) ||
64 put_user(kern->invert, &user->invert) ||
65 put_user(kern->bitmask, &user->bitmask))
71 static struct xt_match ebt_mark_mt_reg __read_mostly = {
74 .family = NFPROTO_BRIDGE,
76 .checkentry = ebt_mark_mt_check,
77 .matchsize = sizeof(struct ebt_mark_m_info),
79 .compatsize = sizeof(struct compat_ebt_mark_m_info),
80 .compat_from_user = mark_mt_compat_from_user,
81 .compat_to_user = mark_mt_compat_to_user,
86 static int __init ebt_mark_m_init(void)
88 return xt_register_match(&ebt_mark_mt_reg);
91 static void __exit ebt_mark_m_fini(void)
93 xt_unregister_match(&ebt_mark_mt_reg);
96 module_init(ebt_mark_m_init);
97 module_exit(ebt_mark_m_fini);
98 MODULE_DESCRIPTION("Ebtables: Packet mark match");
99 MODULE_LICENSE("GPL");