1 /* 2 * Copyright (C) 2008 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 _TETHER_CONTROLLER_H 18 #define _TETHER_CONTROLLER_H 19 20 #include <netinet/in.h> 21 22 #include <list> 23 #include <set> 24 #include <string> 25 26 27 class TetherController { 28 private: 29 std::list<std::string> mInterfaces; 30 // NetId to use for forwarded DNS queries. This may not be the default 31 // network, e.g., in the case where we are tethering to a DUN APN. 32 unsigned mDnsNetId; 33 std::list<std::string> mDnsForwarders; 34 pid_t mDaemonPid; 35 int mDaemonFd; 36 std::set<std::string> mForwardingRequests; 37 38 public: 39 TetherController(); 40 virtual ~TetherController(); 41 42 bool enableForwarding(const char* requester); 43 bool disableForwarding(const char* requester); 44 size_t forwardingRequestCount(); 45 46 int startTethering(int num_addrs, char **dhcp_ranges); 47 int stopTethering(); 48 bool isTetheringStarted(); 49 50 unsigned getDnsNetId(); 51 int setDnsForwarders(unsigned netId, char **servers, int numServers); 52 const std::list<std::string> &getDnsForwarders() const; 53 54 int tetherInterface(const char *interface); 55 int untetherInterface(const char *interface); 56 const std::list<std::string> &getTetheredInterfaceList() const; 57 bool applyDnsInterfaces(); 58 59 private: 60 bool setIpFwdEnabled(); 61 }; 62 63 #endif 64