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      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 #include "VirtualNetwork.h"
     18 
     19 #include "RouteController.h"
     20 
     21 #define LOG_TAG "Netd"
     22 #include "log/log.h"
     23 
     24 VirtualNetwork::VirtualNetwork(unsigned netId, bool hasDns, bool secure) :
     25         Network(netId), mHasDns(hasDns), mSecure(secure) {
     26 }
     27 
     28 VirtualNetwork::~VirtualNetwork() {
     29 }
     30 
     31 bool VirtualNetwork::getHasDns() const {
     32     return mHasDns;
     33 }
     34 
     35 bool VirtualNetwork::isSecure() const {
     36     return mSecure;
     37 }
     38 
     39 bool VirtualNetwork::appliesToUser(uid_t uid) const {
     40     return mUidRanges.hasUid(uid);
     41 }
     42 
     43 int VirtualNetwork::addUsers(const UidRanges& uidRanges) {
     44     for (const std::string& interface : mInterfaces) {
     45         if (int ret = RouteController::addUsersToVirtualNetwork(mNetId, interface.c_str(), mSecure,
     46                                                                 uidRanges)) {
     47             ALOGE("failed to add users on interface %s of netId %u", interface.c_str(), mNetId);
     48             return ret;
     49         }
     50     }
     51     mUidRanges.add(uidRanges);
     52     return 0;
     53 }
     54 
     55 int VirtualNetwork::removeUsers(const UidRanges& uidRanges) {
     56     for (const std::string& interface : mInterfaces) {
     57         if (int ret = RouteController::removeUsersFromVirtualNetwork(mNetId, interface.c_str(),
     58                                                                      mSecure, uidRanges)) {
     59             ALOGE("failed to remove users on interface %s of netId %u", interface.c_str(), mNetId);
     60             return ret;
     61         }
     62     }
     63     mUidRanges.remove(uidRanges);
     64     return 0;
     65 }
     66 
     67 Network::Type VirtualNetwork::getType() const {
     68     return VIRTUAL;
     69 }
     70 
     71 int VirtualNetwork::addInterface(const std::string& interface) {
     72     if (hasInterface(interface)) {
     73         return 0;
     74     }
     75     if (int ret = RouteController::addInterfaceToVirtualNetwork(mNetId, interface.c_str(), mSecure,
     76                                                                 mUidRanges)) {
     77         ALOGE("failed to add interface %s to VPN netId %u", interface.c_str(), mNetId);
     78         return ret;
     79     }
     80     mInterfaces.insert(interface);
     81     return 0;
     82 }
     83 
     84 int VirtualNetwork::removeInterface(const std::string& interface) {
     85     if (!hasInterface(interface)) {
     86         return 0;
     87     }
     88     if (int ret = RouteController::removeInterfaceFromVirtualNetwork(mNetId, interface.c_str(),
     89                                                                      mSecure, mUidRanges)) {
     90         ALOGE("failed to remove interface %s from VPN netId %u", interface.c_str(), mNetId);
     91         return ret;
     92     }
     93     mInterfaces.erase(interface);
     94     return 0;
     95 }
     96