1 /*
2  * Copyright (c) 2024 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 #ifndef NAT464_SERVICE_H
16 #define NAT464_SERVICE_H
17 
18 #include <string>
19 
20 #include "clat_constants.h"
21 #include "ffrt.h"
22 #include "inet_addr.h"
23 #include "net_all_capabilities.h"
24 
25 namespace OHOS {
26 namespace NetManagerStandard {
27 
28 class NetSupplier;
29 
30 class Nat464Service {
31 public:
32     Nat464Service(int32_t netId, const std::string &v6Iface);
33 
34     void UpdateService(Nat464UpdateFlag updateFlag);
35 
36     void MaybeUpdateV6Iface(const std::string &v6Iface);
37 
38 private:
39     void UpdateServiceState(Nat464UpdateFlag updateFlag);
40 
41     void StartPrefixDiscovery();
42 
43     void DiscoverPrefix();
44 
45     bool GetPrefixFromDns64();
46 
47     void StopPrefixDiscovery();
48 
49     void StartService();
50 
51     void StopService();
52 
53     int32_t netId_;
54     std::string v6Iface_;
55     std::string v4TunIface_;
56     static inline ffrt::queue serviceUpdateQueue_{"Nat464ServiceUpdateState"};
57 
58     std::atomic<bool> tryStopDiscovery_;
59     uint32_t discoveryCycleMs_;
60     uint8_t discoveryIter_;
61     INetAddr nat64PrefixFromDns_;
62 
63     volatile Nat464ServiceState serviceState_;
64 };
65 } // namespace NetManagerStandard
66 } // namespace OHOS
67 #endif
68