Home | History | Annotate | Download | only in server 
      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 #ifndef NETD_SERVER_VIRTUAL_NETWORK_H
     18 #define NETD_SERVER_VIRTUAL_NETWORK_H
     19 
     20 #include <set>
     21 
     22 #include "Network.h"
     23 #include "UidRanges.h"
     24 
     25 namespace android {
     26 namespace net {
     27 
     28 // A VirtualNetwork may be "secure" or not.
     29 //
     30 // A secure VPN is the usual type of VPN that grabs the default route (and thus all user traffic).
     31 // Only a few privileged UIDs may skip the VPN and go directly to the underlying physical network.
     32 //
     33 // A non-secure VPN ("bypassable" VPN) also grabs all user traffic by default. But all apps are
     34 // permitted to skip it and pick any other network for their connections.
     35 class VirtualNetwork : public Network {
     36 public:
     37     VirtualNetwork(unsigned netId, bool hasDns, bool secure);
     38     virtual ~VirtualNetwork();
     39 
     40     bool getHasDns() const;
     41     bool isSecure() const;
     42     bool appliesToUser(uid_t uid) const;
     43 
     44     int addUsers(const UidRanges& uidRanges,
     45                  const std::set<uid_t>& protectableUsers) WARN_UNUSED_RESULT;
     46     int removeUsers(const UidRanges& uidRanges,
     47                     const std::set<uid_t>& protectableUsers) WARN_UNUSED_RESULT;
     48 
     49 private:
     50     Type getType() const override;
     51     int addInterface(const std::string& interface) override WARN_UNUSED_RESULT;
     52     int removeInterface(const std::string& interface) override WARN_UNUSED_RESULT;
     53     int maybeCloseSockets(bool add, const UidRanges& uidRanges,
     54                           const std::set<uid_t>& protectableUsers);
     55 
     56     const bool mHasDns;
     57     const bool mSecure;
     58     UidRanges mUidRanges;
     59 };
     60 
     61 }  // namespace net
     62 }  // namespace android
     63 
     64 #endif  // NETD_SERVER_VIRTUAL_NETWORK_H
     65