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 _NAT_CONTROLLER_H 18 #define _NAT_CONTROLLER_H 19 20 #include <linux/in.h> 21 #include <list> 22 #include <string> 23 24 class NatController { 25 public: 26 NatController(); 27 virtual ~NatController(); 28 29 int enableNat(const char* intIface, const char* extIface); 30 int disableNat(const char* intIface, const char* extIface); 31 int setupIptablesHooks(); 32 33 static const char* LOCAL_FORWARD; 34 static const char* LOCAL_MANGLE_FORWARD; 35 static const char* LOCAL_NAT_POSTROUTING; 36 static const char* LOCAL_TETHER_COUNTERS_CHAIN; 37 38 // List of strings of interface pairs. 39 std::list<std::string> ifacePairList; 40 41 private: 42 int natCount; 43 44 bool checkTetherCountingRuleExist(const char *pair_name); 45 46 int setDefaults(); 47 int runCmd(int argc, const char **argv); 48 int setForwardRules(bool set, const char *intIface, const char *extIface); 49 int setTetherCountingRules(bool add, const char *intIface, const char *extIface); 50 }; 51 52 #endif 53
