1 /* 2 * Copyright (c) 2021-2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef APPSPAWN_SOCKET_H 17 #define APPSPAWN_SOCKET_H 18 19 #include <string> 20 #include <sys/socket.h> 21 #include <sys/time.h> 22 #include <sys/un.h> 23 #include <unistd.h> 24 25 #include "nocopyable.h" 26 27 namespace OHOS { 28 namespace AppSpawn { 29 class AppSpawnSocket { 30 public: 31 /** 32 * Constructor used to delete the default constructor. 33 */ 34 AppSpawnSocket() = delete; 35 36 /** 37 * Constructor used to create a AppSpawnSocket. 38 */ 39 explicit AppSpawnSocket(const std::string &name); 40 41 /** 42 * Destructor used to destroy a AppSpawnSocket 43 */ 44 virtual ~AppSpawnSocket(); 45 46 /** 47 * Disables copying and moving for the AppSpawnSocket. 48 */ 49 DISALLOW_COPY_AND_MOVE(AppSpawnSocket); 50 51 /** 52 * Gets the socket's file descriptor (FD). 53 */ 54 int GetSocketFd() const; 55 56 /** 57 * Reads messages from the AppSpawn socket. 58 * 59 * @param socketFd Indicates the socket's FD. 60 * @param buf Indicates the message buffer. 61 * @param len Indicates the message size. 62 * 63 * @return -1:failed;other means message size. 64 */ 65 virtual int ReadSocketMessage(int socketFd, void *buf, int len); 66 67 /** 68 * Writes messages to the AppSpawn socket. 69 * 70 * @param socketFd Indicates the socket's FD. 71 * @param buf Indicates the message buffer. 72 * @param len Indicates the message size. 73 * 74 * @return -1:failed;other means message size. 75 */ 76 virtual int WriteSocketMessage(int socketFd, const void *buf, int len); 77 78 /** 79 * Closes an AppSpawn socket. 80 * 81 * @param socketFd Indicates the socket's FD. 82 */ 83 static void CloseSocket(int &socketFd); 84 85 /** 86 * Creates an AppSpawn socket. 87 * 88 * @return -1:failed;other means connection FD. 89 */ 90 static int CreateSocket(); 91 92 protected: 93 /** 94 * Sets the socket name to the socket address. 95 * 96 * @return -1:failed; 0:success 97 */ 98 int PackSocketAddr(); 99 100 protected: 101 int socketFd_ = -1; 102 std::string socketName_ {}; 103 struct sockaddr_un socketAddr_ {}; 104 socklen_t socketAddrLen_ = 0; 105 #ifdef __MUSL__ 106 const std::string socketDir_ = "/dev/unix/socket/"; 107 #else 108 const std::string socketDir_ = "/dev/socket/"; 109 #endif 110 const unsigned int listenBacklog_ = 50; // 50: max num of clients 111 }; 112 } // namespace AppSpawn 113 } // namespace OHOS 114 #endif 115