C语言socket编程开发应用示例

    SOCKET s=socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);

    sockaddr_in sockaddr;    sockaddr.sin_family=PF_INET;    sockaddr.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");   //需要绑定到本地的哪个IP地址    sockaddr.sin_port=htons(9000);                          //需要监听的端口    bind(s, (SOCKADDR*)&sockaddr, sizeof(SOCKADDR));        //进行绑定动作

    listen(s, 1);                                           //启动监听

    printf("listening on port [%d].\n", 9000);

    while(TRUE)    {        SOCKADDR clientAddr;        int size=sizeof(SOCKADDR);

        SOCKET clientsocket;        clientsocket=accept(s, &clientAddr, &size);               //阻塞，直到有新tcp客户端连接        printf("***SYS***    New client touched.\n");

        char* msg="Hello, my client.\r\n";        send(clientsocket, msg, strlen(msg)+sizeof(char), NULL);  //这里的第三个参数要注意，是加了一个char长度的        printf("***SYS***    HELLO.\n");

        while(TRUE)        {            char buffer[MAXBYTE]={0};            recv(clientsocket, buffer, MAXBYTE, NULL);            //一直接收客户端socket的send操作            printf("***Client***    %s\n", buffer);        }

        closesocket(clientsocket);                                //关闭socket    }

    closesocket(s);　　　　　　　　　　　　　　　　　　　　　　　　　　　//关闭监听socket    WSACleanup();                                                //卸载

    getchar();                                                  

    exit(0);}