socket 开发范型

 原始文章参考：

http://www.codeproject.com/KB/IP/server_client_sockets.aspx

提供了几个简单的基于socket的client、server实例代码。

 

1）对于server来说，开发范型是：

// Initialize WinsockWSADATA wsaData;int iResult = WSAStartup(MAKEWORD(2,2), &wsaData);// Create a SOCKET for connecting to serverSOCKET ConnectSocket;ConnectSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);// The sockaddr_in structure specifies the address family,// IP address, and port of the server to be connected to.struct sockaddr_in serverIPAddr; serverIPAddr.sin_family = AF_INET;serverIPAddr.sin_addr.s_addr = inet_addr( "127.0.0.1" );serverIPAddr.sin_port = htons( 27015 );// bind to an address and a portiResult = bind( ConnectSocket, (SOCKADDR*) &serverIPAddr, sizeof(serverIPAddr) );// wait for client connectioniResult = listen(ConnectSocket, SOMAXCONN);// 实际上，这里收到一个客户请求的socket连接之后，// 应该起新线程，处理send、recv等事宜。SOCKET AcceptSocket=SOCKET_ERROR;AcceptSocket=accept(ConnectSocket, NULL,NULL);// send or recieve dataiResult = send(AcceptSocket, msg, strlen(msg),0);iResult = recv(ConnectSocket, recvbuf, recvbuflen, 0);// cleanupclosesocket(ConnectSocket);WSACleanup();

简化就是：

WSAStartup-->socket-->connect-->send-->[recv]-->[shutdown]-->closesocket-->WSACleanup

 

2）对于client来说，开发范型是：

WSADATA wsaData;SOCKET ConnectSocket;struct sockaddr_in clientService; // Initialize WinsockiResult = WSAStartup(MAKEWORD(2,2), &wsaData);// Create a SOCKET for connecting to serverConnectSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);// The sockaddr_in structure specifies the address family,// IP address, and port of the server to be connected to.clientService.sin_family = AF_INET;clientService.sin_addr.s_addr = inet_addr( "127.0.0.1" );clientService.sin_port = htons( DEFAULT_PORT );// Connect to server.iResult = connect( ConnectSocket, (SOCKADDR*) &clientService, sizeof(clientService) );// Send an initial bufferiResult = send( ConnectSocket, sendbuf, (int)strlen(sendbuf), 0 );// Receive until the peer closes the connectiondo { iResult = recv(ConnectSocket, recvbuf, recvbuflen, 0);} while( iResult > 0 );// shutdown the connection since no more data will be sentiResult = shutdown(ConnectSocket, SD_SEND);// cleanupclosesocket(ConnectSocket);WSACleanup();

简化就是：

WSAStartup-->socket-->bind-->listen-->accept-->[send]-->recv-->[shutdown]-->closesocket-->WSACleanup

 

3）当然这两个范型是最简化的、基于阻塞的、纯粹同步的范型。实际开发的时候，需要考虑的至少有如下几个问题：

基于select或者event的异步；非阻塞；多线程（同步或者异步）。

这些也是下一步学习的重点。