UDP连接代码

由于只有部分代码，自己填不上.......程序未能运行成功，悲剧！

server:

SOCKET s = ::socket(AF_INET,SOCK_DGRAM,IPPROTO_TCP);
     if(s == INVALID_SOCKET)
     {
         printf("Failed socket()\n");
         return 0;
     }
     //填充sockaddr_in结构
     sockaddr_in sin;
     sin.sin_family = AF_INET;
     sin.sin_port = htons(4567);
     sin.sin_addr.S_un.S_addr = INADDR_ANY;
     //绑定这个套接字的一个本地地址
     if(::bind(s,(LPSOCKADDR)&sin,sizeof(sin)) == SOCKET_ERROR)
     {
         printf("Failed bind()\n");
         return 0;
     }
     //进入监听模式
     if(::listen(s,2) == SOCKET_ERROR)
     {
         printf("Failed listen()\n");
         return 0;
     }
     //接收数据
     char buff[1024];
     sockaddr_in addr;
     int nLen = sizeof(addr);
     while(TRUE)
     {
         int nRecv = ::recvfrom(s,buff,1024,0,(sockaddr*)&addr,&nLen);
         if(nRecv > 0)
         {
             buff[nRecv] = '\0';
             printf("接收到数据 (%s):%s",::inet_ntoa(addr.sin_addr),buff);
         }
     }
     ::closesocket(s);

client:

sockaddr_in addr;
     addr.sin_family=AF_INET;
     addr.sin_port=htons(4567);
     addr.sin_addr.S_un.S_addr=inet_addr("49.140.16.244");
     //发送数据
     char szText[] = "TCP Server Demo!\r\n";
     ::sendto(s,szText,strlen(szText),0,(sockaddr*)&addr,sizeof(addr));

只能这样了，日后再说