1 /* 2 * Copyright (C) 2019 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 #pragma once 17 18 #include <cstdint> 19 #include <set> 20 #include <string> 21 22 #include "common/libs/fs/shared_fd.h" 23 24 namespace cuttlefish { 25 // Check network interface with given name exists, such as cvd-ebr. 26 bool NetworkInterfaceExists(const std::string& interface_name); 27 28 #ifdef __linux__ 29 // Creates, or connects to if it already exists, a tap network interface. The 30 // user needs CAP_NET_ADMIN to create such interfaces or be the owner to connect 31 // to one. 32 SharedFD OpenTapInterface(const std::string& interface_name); 33 34 // Returns a list of TAP devices that have open file descriptors 35 std::set<std::string> TapInterfacesInUse(); 36 #endif 37 38 void GenerateCorrespondingIpv6ForMac(const std::uint8_t mac[6], std::uint8_t out[16]); 39 void GenerateMobileMacForInstance(int index, std::uint8_t out[6]); 40 void GenerateEthMacForInstance(int index, std::uint8_t out[6]); 41 void GenerateWifiMacForInstance(int index, std::uint8_t out[6]); 42 43 std::string MacAddressToString(const std::uint8_t mac[6]); 44 std::string Ipv6ToString(const std::uint8_t ip[16]); 45 } 46