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 CLAT_MANAGER_H
16 #define CLAT_MANAGER_H
17 
18 #include <linux/bpf.h>
19 #include <map>
20 #include <string>
21 
22 #include "clat_constants.h"
23 #include "clat_utils.h"
24 #include "clatd.h"
25 #include "inet_addr.h"
26 #include "net_manager_native.h"
27 
28 namespace OHOS {
29 namespace nmd {
30 using namespace OHOS::NetManagerStandard;
31 class ClatManager {
32 public:
33     ClatManager();
34 
35     int32_t ClatStart(const std::string &v6Iface, int32_t netId, const std::string &nat64PrefixStr,
36                       NetManagerNative *netsysService);
37 
38     int32_t ClatStop(const std::string &v6Iface);
39 
40 private:
41     uint32_t GetFwmark(int32_t netId);
42 
43     int32_t GenerateClatSrcAddr(const std::string &v6Iface, uint32_t fwmark, const std::string &nat64PrefixStr,
44                                 INetAddr &v4Addr, INetAddr &v6Addr);
45 
46     int32_t CreateAndConfigureTunIface(const std::string &v6Iface, const std::string &tunIface, const INetAddr &v4Addr,
47                                        NetManagerNative *netsysService, int &tunFd);
48 
49     int32_t CreateAndConfigureClatSocket(const std::string &v6Iface, const INetAddr &v6Addr, uint32_t fwmark,
50                                          int &readSock6, int &writeSock6);
51 
52     std::map<std::string, Clatd> clatds_;
53 
54     std::map<std::string, ClatdTracker> clatdTrackers_;
55 };
56 } // namespace nmd
57 } // namespace OHOS
58 #endif