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 #include "UidRanges.h" 23 24 namespace android::net { 25 26 // A VirtualNetwork may be "secure" or not. 27 // 28 // A secure VPN is the usual type of VPN that grabs the default route (and thus all user traffic). 29 // Only a few privileged UIDs may skip the VPN and go directly to the underlying physical network. 30 // 31 // A non-secure VPN ("bypassable" VPN) also grabs all user traffic by default. But all apps are 32 // permitted to skip it and pick any other network for their connections. 33 class VirtualNetwork : public Network { 34 public: 35 VirtualNetwork(unsigned netId, bool secure); 36 virtual ~VirtualNetwork(); 37 38 bool isSecure() const; 39 bool appliesToUser(uid_t uid) const; 40 41 [[nodiscard]] int addUsers(const UidRanges& uidRanges, const std::set<uid_t>& protectableUsers); 42 [[nodiscard]] int removeUsers(const UidRanges& uidRanges, 43 const std::set<uid_t>& protectableUsers); 44 45 private: 46 Type getType() const override; 47 [[nodiscard]] int addInterface(const std::string& interface) override; 48 [[nodiscard]] int removeInterface(const std::string& interface) override; 49 int maybeCloseSockets(bool add, const UidRanges& uidRanges, 50 const std::set<uid_t>& protectableUsers); 51 52 const bool mSecure; 53 UidRanges mUidRanges; 54 }; 55 56 } // namespace android::net 57