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 <set>
18
19 #define LOG_TAG "Netd"
20
21 #include "VirtualNetwork.h"
22
23 #include "RouteController.h"
24
25 #include "log/log.h"
26
27 namespace android {
28 namespace net {
29
VirtualNetwork(unsigned netId,bool secure)30 VirtualNetwork::VirtualNetwork(unsigned netId, bool secure) : Network(netId, secure) {}
31
~VirtualNetwork()32 VirtualNetwork::~VirtualNetwork() {}
33
addUsers(const UidRanges & uidRanges,uint32_t subPriority)34 int VirtualNetwork::addUsers(const UidRanges& uidRanges, uint32_t subPriority) {
35 if (!isValidSubPriority(subPriority) || !canAddUidRanges(uidRanges, subPriority)) {
36 return -EINVAL;
37 }
38
39 for (const std::string& interface : mInterfaces) {
40 int ret = RouteController::addUsersToVirtualNetwork(mNetId, interface.c_str(), mSecure,
41 {{subPriority, uidRanges}});
42 if (ret) {
43 ALOGE("failed to add users on interface %s of netId %u", interface.c_str(), mNetId);
44 return ret;
45 }
46 }
47 addToUidRangeMap(uidRanges, subPriority);
48 return 0;
49 }
50
removeUsers(const UidRanges & uidRanges,uint32_t subPriority)51 int VirtualNetwork::removeUsers(const UidRanges& uidRanges, uint32_t subPriority) {
52 if (!isValidSubPriority(subPriority)) return -EINVAL;
53
54 for (const std::string& interface : mInterfaces) {
55 int ret = RouteController::removeUsersFromVirtualNetwork(mNetId, interface.c_str(), mSecure,
56 {{subPriority, uidRanges}});
57 if (ret) {
58 ALOGE("failed to remove users on interface %s of netId %u", interface.c_str(), mNetId);
59 return ret;
60 }
61 }
62 removeFromUidRangeMap(uidRanges, subPriority);
63 return 0;
64 }
65
addInterface(const std::string & interface)66 int VirtualNetwork::addInterface(const std::string& interface) {
67 if (hasInterface(interface)) {
68 return 0;
69 }
70 if (int ret = RouteController::addInterfaceToVirtualNetwork(mNetId, interface.c_str(), mSecure,
71 mUidRangeMap)) {
72 ALOGE("failed to add interface %s to VPN netId %u", interface.c_str(), mNetId);
73 return ret;
74 }
75 mInterfaces.insert(interface);
76 return 0;
77 }
78
removeInterface(const std::string & interface)79 int VirtualNetwork::removeInterface(const std::string& interface) {
80 if (!hasInterface(interface)) {
81 return 0;
82 }
83 if (int ret = RouteController::removeInterfaceFromVirtualNetwork(mNetId, interface.c_str(),
84 mSecure, mUidRangeMap)) {
85 ALOGE("failed to remove interface %s from VPN netId %u", interface.c_str(), mNetId);
86 return ret;
87 }
88 mInterfaces.erase(interface);
89 return 0;
90 }
91
isValidSubPriority(uint32_t priority)92 bool VirtualNetwork::isValidSubPriority(uint32_t priority) {
93 // Only supports default subsidiary permissions.
94 return priority == UidRanges::DEFAULT_SUB_PRIORITY;
95 }
96
97 } // namespace net
98 } // namespace android
99