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 ZZR
 http://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 ZZR
 http://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;
 }

原文地址：http://blog.csdn.net/ZhengZhiRen/article/details/4211690