1 /*
2  * Copyright (C) 2023 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 #pragma once
18 
19 #include <android-base/result.h>
20 
21 #include "bpf/BpfMap.h"
22 #include "netd.h"
23 
24 namespace android {
25 namespace net {
26 
27 class DnsBpfHelper {
28  public:
29   DnsBpfHelper() = default;
30   DnsBpfHelper(const DnsBpfHelper&) = delete;
31   DnsBpfHelper& operator=(const DnsBpfHelper&) = delete;
32 
33   base::Result<void> init();
34   base::Result<bool> isUidNetworkingBlocked(uid_t uid, bool metered);
35 
36  private:
37   android::bpf::BpfMapRO<uint32_t, uint32_t> mConfigurationMap;
38   android::bpf::BpfMapRO<uint32_t, UidOwnerValue> mUidOwnerMap;
39   android::bpf::BpfMapRO<uint32_t, bool> mDataSaverEnabledMap;
40 
41   // For testing
42   friend class DnsBpfHelperTest;
43 };
44 
45 }  // namespace net
46 }  // namespace android
47