1 /*
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef NETD_INCLUDE_FWMARK_H
18 #define NETD_INCLUDE_FWMARK_H
19 
20 #include "Permission.h"
21 
22 #include <stdint.h>
23 
24 union Fwmark {
25     uint32_t intValue;
26     struct {
27         unsigned netId          : 16;
28         bool explicitlySelected :  1;
29         bool protectedFromVpn   :  1;
30         Permission permission   :  2;
31         bool uidBillingDone     :  1;
32         unsigned reserved       :  8;
33         unsigned vendor         :  2;  // reserved for vendor
34         bool ingress_cpu_wakeup :  1;  // reserved for config_networkWakeupPacketMark/Mask
35     };
Fwmark()36     constexpr Fwmark() : intValue(0) {}
37 
getUidBillingMask()38     static inline uint32_t getUidBillingMask() {
39         Fwmark m;
40         m.uidBillingDone = true;
41         return m.intValue;
42     }
43 
getIngressCpuWakeupMask()44     static inline uint32_t getIngressCpuWakeupMask() {
45         Fwmark m;
46         m.ingress_cpu_wakeup = true;
47         return m.intValue;
48     }
49 };
50 
51 static const unsigned FWMARK_NET_ID_MASK = 0xffff;
52 
53 static_assert(sizeof(Fwmark) == sizeof(uint32_t), "The entire fwmark must fit into 32 bits");
54 
55 #endif  // NETD_INCLUDE_FWMARK_H
56