简单 Winsock Demo

Server：

#include<Winsock2.h>#include<stdio.h>#include<stdlib.h>#define PORT 5000void main(){// 打开 Winsock，服务以 动态链接库 实现WSADATA wsaData;if( WSAStartup(MAKEWORD(2,2) , &wsaData )!=0 ){// 0表示成功printf("Winsock load failed/n");return ;}// 创建 监听套接口，流式套接口SOCKET sListen=socket(AF_INET,SOCK_STREAM,0);if(sListen==INVALID_SOCKET){printf("socket failed:%d/n",WSAGetLastError());return;}// 服务器 地址sockaddr_in serv;serv.sin_family=AF_INET;int port=PORT;serv.sin_port=htons(port);//端口16位serv.sin_addr.s_addr=htonl(INADDR_ANY);//ip32位// 绑定if( bind(sListen,(LPSOCKADDR)&serv, sizeof(serv)) ==SOCKET_ERROR){printf("bind() failed:%d/n",WSAGetLastError());return ;}// 监听if( listen(sListen,5)==SOCKET_ERROR ){printf("listen() failed:%d/n",WSAGetLastError());return ;}sockaddr_in client;int iLen=sizeof(client);while(true){// 等待客户连接请求SOCKET sAccept=accept(sListen, (sockaddr*)&client, &iLen);if(sAccept==SOCKET_ERROR){printf("accept() failed:%d/n",WSAGetLastError());break; ;}// 输出客户IP地址和端口printf("accepted client IP:[%s],port:[%d]/n",inet_ntoa(client.sin_addr), ntohs(client.sin_port));// 给客户发送信息char buf[]=" HELLO, HOW ARE YOU!";int iSend=send(sAccept,buf,sizeof(buf),0);if(iSend==SOCKET_ERROR){printf("send() failed:%d/n",WSAGetLastError());break; ;}else if(iSend==0)break;else printf("send() byte:%d/n",iSend);closesocket(sAccept);}closesocket(sListen);WSACleanup();}

 

Client：

#include<Winsock2.h>#include<stdio.h>#include<stdlib.h>#define PORT 5000#define BUFFER 1024void main(int argc, char * argv[]){// 打开 Winsock，服务以 动态链接库 实现WSADATA wsaData;if( WSAStartup(MAKEWORD(2,2) , &wsaData )!=0 ){// 0表示成功printf("Winsock load failed/n");return ;}// 服务器 地址sockaddr_in server;server.sin_family=AF_INET;int port=PORT;server.sin_port=htons(port);server.sin_addr.s_addr=inet_addr("169.254.18.135");// 创建 套接口SOCKET clientSocket=socket(AF_INET, SOCK_STREAM,0);if(clientSocket==INVALID_SOCKET){printf("socket() failed:%d/n",WSAGetLastError());return;}// 连接服务器if( connect(clientSocket, (sockaddr*)&server,sizeof(server) )==INVALID_SOCKET ){printf("connect() failed:%d/n",WSAGetLastError());return;}else {char buf[BUFFER];int iLen=recv(clientSocket,buf,sizeof(buf),0);if(iLen==0)return;else if(iLen==SOCKET_ERROR){printf("recv() failed:%d/n",WSAGetLastError());return;}elseprintf("recv() data from server :%s/n",buf);}closesocket(clientSocket);WSACleanup();system("pause");}