projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 1da177e4 LT |
2 | /* |
| 3 | * ebt_mark_m | |
| 4 | * | |
| 5 | * Authors: | |
| 6 | * Bart De Schuymer <bdschuym@pandora.be> | |
| 7 | * | |
| 8 | * July, 2002 | |
| 9 | * | |
| 10 | */ | |
| 18219d3f JE |
11 | #include <linux/module.h> |
| 12 | #include <linux/netfilter/x_tables.h> | |
| 1da177e4 LT |
13 | #include <linux/netfilter_bridge/ebtables.h> |
| 14 | #include <linux/netfilter_bridge/ebt_mark_m.h> | |
| 1da177e4 | 15 | |
| 2d06d4a5 | 16 | static bool |
| 62fc8051 | 17 | ebt_mark_mt(const struct sk_buff *skb, struct xt_action_param *par) |
| 1da177e4 | 18 | { |
| f7108a20 | 19 | const struct ebt_mark_m_info *info = par->matchinfo; |
| 1da177e4 LT |
20 | |
| 21 | if (info->bitmask & EBT_MARK_OR) | |
| 8cc784ee JE |
22 | return !!(skb->mark & info->mask) ^ info->invert; |
| 23 | return ((skb->mark & info->mask) == info->mark) ^ info->invert; | |
| 1da177e4 LT |
24 | } |
| 25 | ||
| b0f38452 | 26 | static int ebt_mark_mt_check(const struct xt_mtchk_param *par) |
| 1da177e4 | 27 | { |
| 9b4fce7a | 28 | const struct ebt_mark_m_info *info = par->matchinfo; |
| 1da177e4 | 29 | |
| 1da177e4 | 30 | if (info->bitmask & ~EBT_MARK_MASK) |
| bd414ee6 | 31 | return -EINVAL; |
| 1da177e4 | 32 | if ((info->bitmask & EBT_MARK_OR) && (info->bitmask & EBT_MARK_AND)) |
| bd414ee6 | 33 | return -EINVAL; |
| 1da177e4 | 34 | if (!info->bitmask) |
| bd414ee6 JE |
35 | return -EINVAL; |
| 36 | return 0; | |
| 1da177e4 LT |
37 | } |
| 38 | ||
| 6e705f56 FW |
39 | |
| 40 | #ifdef CONFIG_COMPAT | |
| 41 | struct compat_ebt_mark_m_info { | |
| 42 | compat_ulong_t mark, mask; | |
| 43 | uint8_t invert, bitmask; | |
| 44 | }; | |
| 45 | ||
| 46 | static void mark_mt_compat_from_user(void *dst, const void *src) | |
| 47 | { | |
| 48 | const struct compat_ebt_mark_m_info *user = src; | |
| 49 | struct ebt_mark_m_info *kern = dst; | |
| 50 | ||
| 51 | kern->mark = user->mark; | |
| 52 | kern->mask = user->mask; | |
| 53 | kern->invert = user->invert; | |
| 54 | kern->bitmask = user->bitmask; | |
| 55 | } | |
| 56 | ||
| 57 | static int mark_mt_compat_to_user(void __user *dst, const void *src) | |
| 58 | { | |
| 59 | struct compat_ebt_mark_m_info __user *user = dst; | |
| 60 | const struct ebt_mark_m_info *kern = src; | |
| 61 | ||
| 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)) | |
| 66 | return -EFAULT; | |
| 67 | return 0; | |
| 68 | } | |
| 69 | #endif | |
| 70 | ||
| 043ef46c JE |
71 | static struct xt_match ebt_mark_mt_reg __read_mostly = { |
| 72 | .name = "mark_m", | |
| 001a18d3 JE |
73 | .revision = 0, |
| 74 | .family = NFPROTO_BRIDGE, | |
| 2d06d4a5 JE |
75 | .match = ebt_mark_mt, |
| 76 | .checkentry = ebt_mark_mt_check, | |
| fc0e3df4 | 77 | .matchsize = sizeof(struct ebt_mark_m_info), |
| 6e705f56 FW |
78 | #ifdef CONFIG_COMPAT |
| 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, | |
| 82 | #endif | |
| 1da177e4 LT |
83 | .me = THIS_MODULE, |
| 84 | }; | |
| 85 | ||
| 65b4b4e8 | 86 | static int __init ebt_mark_m_init(void) |
| 1da177e4 | 87 | { |
| 043ef46c | 88 | return xt_register_match(&ebt_mark_mt_reg); |
| 1da177e4 LT |
89 | } |
| 90 | ||
| 65b4b4e8 | 91 | static void __exit ebt_mark_m_fini(void) |
| 1da177e4 | 92 | { |
| 043ef46c | 93 | xt_unregister_match(&ebt_mark_mt_reg); |
| 1da177e4 LT |
94 | } |
| 95 | ||
| 65b4b4e8 AM |
96 | module_init(ebt_mark_m_init); |
| 97 | module_exit(ebt_mark_m_fini); | |
| f776c4cd | 98 | MODULE_DESCRIPTION("Ebtables: Packet mark match"); |
| 1da177e4 | 99 | MODULE_LICENSE("GPL"); |