Winsock入门编程示例代码

Winsock入门，socket编程，网络

 

 

客户端代码：

#include <stdio.h>#include <string.h>#include <winsock2.h>#pragma comment(lib,"Ws2_32.lib")#define BUFFER_SIZE 50/*客户端代码 by ZZRhttp://blog.csdn.net/zhengzhiren*/int main(){int err;SOCKET sClient;char ip[20];/*IP地址*/char buf[BUFFER_SIZE];/*数据发送缓冲区*/int port;/*端口*/WSADATA wsaD;struct sockaddr_in servaddr;/*存放服务器端网络地址的结构*/printf("Please input target IP and Port(eg:127.0.0.1 5555):/n");scanf("%s%hu",ip,&port);memset(&servaddr,0,sizeof(servaddr));servaddr.sin_family = AF_INET;servaddr.sin_addr.s_addr = inet_addr(ip);servaddr.sin_port = htons(port);/*Winsock初始化*/err = WSAStartup(MAKEWORD(1,1),&wsaD);/*创建Socket*/if((sClient = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP)) == SOCKET_ERROR){err = WSAGetLastError();printf("Create socket error %d",err);return -1;}/*连接到服务器*/if(connect(sClient,(struct sockaddr *) &servaddr,sizeof(servaddr)) == SOCKET_ERROR){err = WSAGetLastError();printf("Failed to connect to server!%d/n",err);return -1;}printf("Connected to server %s/n",inet_ntoa(servaddr.sin_addr));while(1){gets(buf);if (strcmp(buf,"quit")==0 || strcmp(buf,"exit")==0)break;send(sClient,buf,strlen(buf)+1,0) ;/*发送数据*/}closesocket(sClient);WSACleanup();}

 

 

服务端代码：

#include <stdio.h>#include <winsock2.h>#pragma comment(lib,"Ws2_32.lib")//#pragma comment(linker, "/SUBSYSTEM:CONSOLE")#define BUFFER_SIZE 500/*服务端代码 by ZZRhttp://blog.csdn.net/zhengzhiren*/int main(){int err;int len;SOCKET sListen;/*监听套接字*/SOCKET sConnect;/*用于建立连接的套接字*/WSADATA wsaD;struct sockaddr_in my_addr;u_short port;/*监听端口*/char buf[BUFFER_SIZE];struct sockaddr_in addr;/*客户机的网络地址*/int addrlen;/*地址长度*/printf("Please input Port:/n");scanf("%hu",&port);err = WSAStartup(MAKEWORD(1,1),&wsaD);/* 初始化Winsock */if((sListen = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP)) == SOCKET_ERROR){/* 创建套接字s */err = WSAGetLastError();printf("%d socket error!",err);return -1;}memset(&my_addr,0,sizeof(my_addr));/* 清空sockaddr结构 */my_addr.sin_family = AF_INET;my_addr.sin_port = htons(port);my_addr.sin_addr.s_addr = htonl(INADDR_ANY);if(bind(sListen,(struct sockaddr *) &my_addr,sizeof(my_addr)) == SOCKET_ERROR)/* 绑定 */{err = WSAGetLastError();printf("Error:%d Failed to bind!/n",err);return -1;}if(listen(sListen,5) == SOCKET_ERROR)/* 启动监听 */{err = WSAGetLastError();printf("Error:%d Failed to listen!/n",err);return -1;}printf("Listening on port %d/n",ntohs(my_addr.sin_port));addrlen = sizeof(addr);if((sConnect = accept(sListen,(struct sockaddr *) &addr,&addrlen)) != INVALID_SOCKET)printf("%s has connected to this server./n",inet_ntoa(addr.sin_addr));while(1){memset(buf,0,sizeof(buf));len = recv(sConnect,buf,sizeof(buf),0);/*接收数据*/if (len > 0){printf("%s",buf);}else if (len==0){closesocket(sConnect);break;}}WSACleanup();return 0;}