1 /*
2  * Copyright (C) 2019 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 _RESOLVER_CONTROLLER_H_
18 #define _RESOLVER_CONTROLLER_H_
19 
20 #include <list>
21 #include <set>
22 #include <vector>
23 
24 #include <aidl/android/net/ResolverParamsParcel.h>
25 #include "Dns64Configuration.h"
26 #include "netd_resolv/resolv.h"
27 #include "netdutils/DumpWriter.h"
28 
29 struct res_params;
30 
31 namespace android {
32 namespace net {
33 
34 class ResolverController {
35   public:
36     ResolverController();
37     ~ResolverController() = default;
38 
39     void destroyNetworkCache(unsigned netid);
40     int createNetworkCache(unsigned netid);
41     int flushNetworkCache(unsigned netid);
42 
43     // Binder specific functions, which convert between the ResolverParamsParcel and the
44     // actual data structures.
45     int setResolverConfiguration(const aidl::android::net::ResolverParamsParcel& resolverParams);
46 
47     int getResolverInfo(int32_t netId, std::vector<std::string>* servers,
48                         std::vector<std::string>* domains, std::vector<std::string>* tlsServers,
49                         std::vector<int32_t>* params, std::vector<int32_t>* stats,
50                         std::vector<int32_t>* wait_for_pending_req_timeout_count);
51 
52     // Start or stop NAT64 prefix discovery.
53     void startPrefix64Discovery(int32_t netId);
54     void stopPrefix64Discovery(int32_t netId);
55 
56     // Set or clear a NAT64 prefix discovered by other sources (e.g., RA).
setPrefix64(unsigned netId,const netdutils::IPPrefix & prefix)57     int setPrefix64(unsigned netId, const netdutils::IPPrefix& prefix) {
58         return mDns64Configuration.setPrefix64(netId, prefix);
59     }
60 
clearPrefix64(unsigned netId)61     int clearPrefix64(unsigned netId) { return mDns64Configuration.clearPrefix64(netId); }
62 
63     // Return the current NAT64 prefix network, regardless of how it was discovered.
64     int getPrefix64(unsigned netId, netdutils::IPPrefix* prefix);
65 
66     void dump(netdutils::DumpWriter& dw, unsigned netId);
67 
68   private:
69     Dns64Configuration mDns64Configuration;
70 };
71 }  // namespace net
72 }  // namespace android
73 
74 #endif /* _RESOLVER_CONTROLLER_H_ */
75