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_ROUTE_CONTROLLER_H 18 #define NETD_SERVER_ROUTE_CONTROLLER_H 19 20 #include "NetdConstants.h" 21 #include "Permission.h" 22 23 #include <sys/types.h> 24 25 class UidRanges; 26 27 class RouteController { 28 public: 29 // How the routing table number is determined for route modification requests. 30 enum TableType { 31 INTERFACE, // Compute the table number based on the interface index. 32 LOCAL_NETWORK, // A fixed table used for routes to directly-connected clients/peers. 33 LEGACY_NETWORK, // Use a fixed table that's used to override the default network. 34 LEGACY_SYSTEM, // A fixed table, only modifiable by system apps; overrides VPNs too. 35 }; 36 37 static const int ROUTE_TABLE_OFFSET_FROM_INDEX = 1000; 38 39 static int Init(unsigned localNetId) WARN_UNUSED_RESULT; 40 41 static int addInterfaceToLocalNetwork(unsigned netId, const char* interface) WARN_UNUSED_RESULT; 42 static int removeInterfaceFromLocalNetwork(unsigned netId, 43 const char* interface) WARN_UNUSED_RESULT; 44 45 static int addInterfaceToPhysicalNetwork(unsigned netId, const char* interface, 46 Permission permission) WARN_UNUSED_RESULT; 47 static int removeInterfaceFromPhysicalNetwork(unsigned netId, const char* interface, 48 Permission permission) WARN_UNUSED_RESULT; 49 50 static int addInterfaceToVirtualNetwork(unsigned netId, const char* interface, bool secure, 51 const UidRanges& uidRanges) WARN_UNUSED_RESULT; 52 static int removeInterfaceFromVirtualNetwork(unsigned netId, const char* interface, bool secure, 53 const UidRanges& uidRanges) WARN_UNUSED_RESULT; 54 55 static int modifyPhysicalNetworkPermission(unsigned netId, const char* interface, 56 Permission oldPermission, 57 Permission newPermission) WARN_UNUSED_RESULT; 58 59 static int addUsersToVirtualNetwork(unsigned netId, const char* interface, bool secure, 60 const UidRanges& uidRanges) WARN_UNUSED_RESULT; 61 static int removeUsersFromVirtualNetwork(unsigned netId, const char* interface, bool secure, 62 const UidRanges& uidRanges) WARN_UNUSED_RESULT; 63 64 static int addInterfaceToDefaultNetwork(const char* interface, 65 Permission permission) WARN_UNUSED_RESULT; 66 static int removeInterfaceFromDefaultNetwork(const char* interface, 67 Permission permission) WARN_UNUSED_RESULT; 68 69 // |nexthop| can be NULL (to indicate a directly-connected route), "unreachable" (to indicate a 70 // route that's blocked), "throw" (to indicate the lack of a match), or a regular IP address. 71 static int addRoute(const char* interface, const char* destination, const char* nexthop, 72 TableType tableType) WARN_UNUSED_RESULT; 73 static int removeRoute(const char* interface, const char* destination, const char* nexthop, 74 TableType tableType) WARN_UNUSED_RESULT; 75 76 static int enableTethering(const char* inputInterface, 77 const char* outputInterface) WARN_UNUSED_RESULT; 78 static int disableTethering(const char* inputInterface, 79 const char* outputInterface) WARN_UNUSED_RESULT; 80 81 static int addVirtualNetworkFallthrough(unsigned vpnNetId, const char* physicalInterface, 82 Permission permission) WARN_UNUSED_RESULT; 83 static int removeVirtualNetworkFallthrough(unsigned vpnNetId, const char* physicalInterface, 84 Permission permission) WARN_UNUSED_RESULT; 85 }; 86 87 #endif // NETD_SERVER_ROUTE_CONTROLLER_H 88