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      1 /*
      2  * Copyright (C) 2012 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 _INTERFACE_CONTROLLER_H
     18 #define _INTERFACE_CONTROLLER_H
     19 
     20 #include <functional>
     21 #include <string>
     22 
     23 #include <netdutils/Status.h>
     24 
     25 // TODO: move InterfaceController into android::net namespace.
     26 namespace android {
     27 namespace net {
     28 class StablePrivacyTest;
     29 }  // namespace net
     30 }  // namespace android
     31 
     32 class InterfaceController {
     33 public:
     34     static void initializeAll();
     35 
     36     static int setEnableIPv6(const char *interface, const int on);
     37     static android::netdutils::Status setIPv6AddrGenMode(const std::string& interface, int mode);
     38     static int setAcceptIPv6Ra(const char *interface, const int on);
     39     static int setAcceptIPv6Dad(const char *interface, const int on);
     40     static int setIPv6DadTransmits(const char *interface, const char *value);
     41     static int setIPv6PrivacyExtensions(const char *interface, const int on);
     42     static int setIPv6NdOffload(char* interface, const int on);
     43     static int setMtu(const char *interface, const char *mtu);
     44     static int addAddress(const char *interface, const char *addrString, int prefixLength);
     45     static int delAddress(const char *interface, const char *addrString, int prefixLength);
     46 
     47     // Read and write values in files of the form:
     48     //     /proc/sys/net/<family>/<which>/<interface>/<parameter>
     49     static int getParameter(
     50             const char *family, const char *which, const char *interface, const char *parameter,
     51             std::string *value);
     52     static int setParameter(
     53             const char *family, const char *which, const char *interface, const char *parameter,
     54             const char *value);
     55 
     56 private:
     57   friend class android::net::StablePrivacyTest;
     58 
     59   using GetPropertyFn =
     60       std::function<std::string(const std::string& key, const std::string& dflt)>;
     61   using SetPropertyFn =
     62       std::function<android::netdutils::Status(const std::string& key, const std::string& val)>;
     63 
     64   // Helper function exported from this compilation unit for testing.
     65   static android::netdutils::Status enableStablePrivacyAddresses(const std::string& iface,
     66                                                                  GetPropertyFn getProperty,
     67                                                                  SetPropertyFn setProperty);
     68 
     69   static void setAcceptRA(const char* value);
     70   static void setAcceptRARouteTable(int tableOrOffset);
     71   static void setBaseReachableTimeMs(unsigned int millis);
     72   static void setIPv6OptimisticMode(const char* value);
     73 
     74   InterfaceController() = delete;
     75   ~InterfaceController() = delete;
     76 };
     77 
     78 #endif
     79