Socket IO模型详解.docVIP

Socket I/O模型之选择(select) 在windows平台构建网络应用，必须了解socket I/O模型。windows提供了选择(select)、异步选择(WSAAsyncSelect)、事件选择(WSAEventSelect)、重叠I /O(overlapped I/O)和完成端口(completion port)。 一、客户端代码 C++代码 #include?stdafx.h ?? #include?WINSOCK2.H ?? #include?stdio.h ?? #pragma?comment(lib,?ws2_32.lib) ?? #define?SERVER_ADDRESS??192.168.10.56 ?? #define?PORT??5150 ?? #define?MSGSIZE??1024 ?? int?main(int?argc,?char*?argv[]) ?? { ?? ????WSADATA?wsaData; ?? ????SOCKET?sClient; ?? ????SOCKADDR_IN?server; ?? ????char?szMessage[MSGSIZE]; ?? ????int?ret; ?? ????//?Initialize?windows?socket?library ?? ????WSAStartup(0x0202,?wsaData); ?? ????//?Create?client?socket ?? ????sClient?=?socket(AF_INET,?SOCK_STREAM,?IPPROTO_TCP); ?? ????//?Connect?to?server ?? ????memset(server,?0,?sizeof(SOCKADDR_IN)); ?? ????server.sin_family?=?AF_INET; ?? ????server.sin_addr.S_un.S_addr?=?inet_addr(SERVER_ADDRESS); ?? ????server.sin_port?=?htons(PORT); ?? ????connect(sClient,?(sockaddr*)server,?sizeof(SOCKADDR_IN)); ?? ????while?(TRUE)? ?? ????{ ?? ????????printf(Send:); ?? ????????gets(szMessage); ?? ????????//?Send?message ?? ????????send(sClient,?szMessage,?strlen(szMessage),?0); ?? ????????//?Receive?message ?? ????????ret?=?recv(sClient,?szMessage,?MSGSIZE,?0); ?? ????????szMessage[ret]?=?\0; ?? ????????printf(Received?[%d?bytes]:?%s\n,?ret,?szMessage); ?? ????} ?? ????//?Clean?up ?? ????closesocket(sClient); ?? ????WSACleanup(); ?? ????return?0; ?? }?? #include stdafx.h #include WINSOCK2.H #include stdio.h #pragma comment(lib, ws2_32.lib) #define SERVER_ADDRESS 192.168.10.56 #define PORT 5150 #define MSGSIZE 1024 int main(int argc, char* argv[]) { WSADATA wsaData; SOCKET sClient; SOCKADDR_IN server; char szMessage[MSGSIZE]; int ret; // Initialize windows socket library WSAStartup(0x0202, wsaData); // Create client socket sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); // Connect to server memset(server, 0, sizeof(SOCKADDR_IN)); server.sin_family = AF_INET; server.sin_addr.S_un.S_addr = i