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 #pragma once
18 
19 #include <set>
20 
21 #include "Network.h"
22 
23 namespace android::net {
24 
25 // A VirtualNetwork may be "secure" or not.
26 //
27 // A secure VPN is the usual type of VPN that grabs the default route (and thus all user traffic).
28 // Only a few privileged UIDs may skip the VPN and go directly to the underlying physical network.
29 //
30 // A non-secure VPN ("bypassable" VPN) also grabs all user traffic by default. But all apps are
31 // permitted to skip it and pick any other network for their connections.
32 class VirtualNetwork : public Network {
33 public:
34     VirtualNetwork(unsigned netId, bool secure);
35     virtual ~VirtualNetwork();
36     [[nodiscard]] int addUsers(const UidRanges& uidRanges, uint32_t subPriority) override;
37     [[nodiscard]] int removeUsers(const UidRanges& uidRanges, uint32_t subPriority) override;
isVirtual()38     bool isVirtual() override { return true; }
canAddUsers()39     bool canAddUsers() override { return true; }
40 
41   private:
getTypeString()42     std::string getTypeString() const override { return "VIRTUAL"; };
43     [[nodiscard]] int addInterface(const std::string& interface) override;
44     [[nodiscard]] int removeInterface(const std::string& interface) override;
45     bool isValidSubPriority(uint32_t priority) override;
46 };
47 
48 }  // namespace android::net
49