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
22#include "SecondaryTableController.h"
23
24class NatController {
25
26public:
27    NatController(SecondaryTableController *ctrl);
28    virtual ~NatController();
29
30    int enableNat(const int argc, char **argv);
31    int disableNat(const int argc, char **argv);
32    int setupIptablesHooks();
33
34    static const char* LOCAL_FORWARD;
35    static const char* LOCAL_NAT_POSTROUTING;
36    static const char* LOCAL_TETHER_COUNTERS_CHAIN;
37
38private:
39    int natCount;
40    SecondaryTableController *secondaryTableCtrl;
41
42    int setDefaults();
43    int runCmd(int argc, const char **argv);
44    bool checkInterface(const char *iface);
45    int setForwardRules(bool set, const char *intIface, const char *extIface);
46    int setTetherCountingRules(bool add, const char *intIface, const char *extIface);
47    int routesOp(bool add, const char *intIface, const char *extIface, char **argv, int addrCount);
48};
49
50#endif
51