TetherController.h revision 799625cd5b0a2191632f5b042bf9ff559c18a848 
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#include <set>
22#include <string>
23
24#include "List.h"
25
26typedef android::netd::List<char *> InterfaceCollection;
27typedef android::netd::List<struct in_addr> NetAddressCollection;
28
29class TetherController {
30    InterfaceCollection  *mInterfaces;
31    // NetId to use for forwarded DNS queries. This may not be the default
32    // network, e.g., in the case where we are tethering to a DUN APN.
33    unsigned              mDnsNetId;
34    NetAddressCollection *mDnsForwarders;
35    pid_t                 mDaemonPid;
36    int                   mDaemonFd;
37    std::set<std::string> mForwardingRequests;
38
39public:
40    TetherController();
41    virtual ~TetherController();
42
43    bool enableForwarding(const char* requester);
44    bool disableForwarding(const char* requester);
45    size_t forwardingRequestCount();
46
47    int startTethering(int num_addrs, struct in_addr* addrs);
48    int stopTethering();
49    bool isTetheringStarted();
50
51    unsigned getDnsNetId();
52    int setDnsForwarders(unsigned netId, char **servers, int numServers);
53    NetAddressCollection *getDnsForwarders();
54
55    int tetherInterface(const char *interface);
56    int untetherInterface(const char *interface);
57    InterfaceCollection *getTetheredInterfaceList();
58
59private:
60    int applyDnsInterfaces();
61    bool setIpFwdEnabled();
62};
63
64#endif
65