标签:socket
自定义协议服务
// server.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <windows.h> #include <stdio.h> #include <winsock2.h> #pragma comment(lib,"Ws2_32") #define SERVER_PORT 2000 //侦听端口 int main(int argc, char * argv[]) { WORD wVersionRequested; WSADATA wsaData; int ret, nLeft, length; SOCKET sListen, sServer; //侦听套接字,连接套接字 struct sockaddr_in saServer, saClient; //地址信息 char *ptr;//用于遍历信息的指针 //WinSock初始化 wVersionRequested=MAKEWORD(2, 2); //希望使用的WinSock DLL 的版本 ret=WSAStartup(wVersionRequested, &wsaData); if(ret!=0) { printf("WSAStartup() failed!\n"); //return 0; } //创建Socket,使用TCP协议 sListen=socket(AF_INET, SOCK_STREAM, 0); if (sListen == INVALID_SOCKET) { WSACleanup(); printf("socket() faild!\n"); //return 0; } //构建本地地址信息 saServer.sin_family = AF_INET; //地址家族 saServer.sin_port = htons(SERVER_PORT); //注意转化为网络字节序 saServer.sin_addr.S_un.S_addr = htonl(INADDR_ANY); //使用INADDR_ANY 指示任意地址 //绑定 ret = bind(sListen, (struct sockaddr *)&saServer, sizeof(saServer)); if (ret == SOCKET_ERROR) { printf("bind() faild! code:%d\n", WSAGetLastError()); closesocket(sListen); //关闭套接字 WSACleanup(); //return 0; } //侦听连接请求 ret = listen(sListen, 5); if (ret == SOCKET_ERROR) { printf("listen() faild! code:%d\n", WSAGetLastError()); closesocket(sListen); //关闭套接字 //return 0; } printf("Waiting for client connecting!\n"); printf("Tips: Ctrl+c to quit!\n"); //阻塞等待接受客户端连接 while(1)//循环监听客户端,永远不停止,所以,在本项目中,我们没有心跳包。 { length = sizeof(saClient); sServer = accept(sListen, (struct sockaddr *)&saClient, &length); if (sServer == INVALID_SOCKET) { printf("accept() faild! code:%d\n", WSAGetLastError()); closesocket(sListen); //关闭套接字 WSACleanup(); return 0; } unsigned long ul = 1; ret = ioctlsocket(sServer,FIONBIO,(unsigned long*)&ul); if(ret==SOCKET_ERROR) { closesocket(sServer); WSACleanup(); return -3; } char receiveMessage[100]; memset(receiveMessage,0,100); nLeft = sizeof(receiveMessage); ptr = (char *)&receiveMessage; while(nLeft>0) { //接收数据 ret = recv(sServer, ptr, 100, 0); if (ret == SOCKET_ERROR) { break; } if (ret == 0) //客户端已经关闭连接 { printf("Client has closed the connection\n"); break; } nLeft -= ret; ptr += ret; } printf("receive message:%s\n", receiveMessage);//打印我们接收到的消息。 char sendMessage[]="hello client"; //发送信息给客户端 send(sServer,sendMessage,strlen(sendMessage)+1,0); } closesocket(sListen); closesocket(sServer); WSACleanup(); return 0; }
标签:socket
原文地址:http://embeded.blog.51cto.com/3989210/1576306