C++ Socket Hello World

////////////////////////////////////////////////////////////////////////// // TCPServer.cpp #include <stdio.h> #include <WINSOCK2.H> #pragma comment(lib,"WS2_32.lib") #define BUF_SIZE 64 // 缓冲区大小 int main(void) { WSADATA wsd; // WSADATA变量 SOCKET sServer; // 服务器套接字 SOCKET sClient; // 客户端套接字 int retVal; // 返回值 char buf[BUF_SIZE]; // 接受数据 // 初始化套接字动态库 ZeroMemory(buf,BUF_SIZE); if(WSAStartup(MAKEWORD(2,2),&wsd) != 0) { printf("WSAStartup failed !\n"); return 1; } // 创建套接字 sServer = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); if(INVALID_SOCKET == sServer) { printf("socket failed !\n"); WSACleanup(); return -1; } // 服务器套接字地址 SOCKADDR_IN addrServ; addrServ.sin_family = AF_INET; addrServ.sin_port = htons(4999); addrServ.sin_addr.S_un.S_addr = htonl(INADDR_ANY); // 绑定套接字 retVal = bind(sServer,(const struct sockaddr*)&addrServ,sizeof(SOCKADDR_IN)); if(SOCKET_ERROR == retVal) { printf("bind failed !\n"); closesocket(sServer); WSACleanup(); return -1; } // 监听套接字 retVal = listen(sServer,1); if(SOCKET_ERROR == retVal) { printf("listen failed !\n"); closesocket(sServer); WSACleanup(); return -1; } // 接受客户请求 sockaddr_in addrClient; int addrClientlen = sizeof(addrClient); sClient = accept(sServer,(sockaddr FAR*)&addrClient,&addrClientlen); if(INVALID_SOCKET == sClient) { printf("accept failed !\n"); closesocket(sServer); WSACleanup(); return -1; } // 接受客户数据 retVal = recv(sClient,buf,BUFSIZ,0); if(SOCKET_ERROR == retVal) { printf("recv failed !\n"); closesocket(sServer); closesocket(sClient); WSACleanup(); return -1; } // 退出程序 printf("Recv From Client:%s\n",buf); retVal = send(sClient,"Hello World !",strlen("Hello World !"),0); if(SOCKET_ERROR == retVal) { printf("send failed !\n"); closesocket(sServer); closesocket(sClient); WSACleanup(); return -1; } // 退出程序 closesocket(sServer); closesocket(sClient); WSACleanup(); return 0; }