#include <Winsock2.h>

#include <stdio.h>

void main()

{

    // 以下的几句都是固定的

    WORD wVersionRequested;

    WSADATA wsaData;

    int err;

    wVersionRequested = MAKEWORD( ,  );

    err = WSAStartup( wVersionRequested, &wsaData );//该函数的功能是加载一个Winsocket库版本

    if ( err !=  ) {

        return;

    }

    if ( LOBYTE( wsaData.wVersion ) !=  ||

        HIBYTE( wsaData.wVersion ) !=  ) {

            WSACleanup( );

            return;

    }

    //真正socket编程部分

    SOCKET sockSrv=socket(AF_INET,SOCK_STREAM,);//面向连接的可靠性服务SOCK_STRAM

    SOCKADDR_IN addrSrv;//存放本地地址信息的

    addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);//htol将主机字节序long型转换为网络字节序

    addrSrv.sin_family=AF_INET;

    addrSrv.sin_port=htons();//htos用来将端口转换成字符，1024以上的数字即可

    bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));//将socket绑定到相应地址和端口上

    listen(sockSrv,);//等待队列中的最大长度为5

    SOCKADDR_IN addrClient;

    int len=sizeof(SOCKADDR);

    while()

    {

        SOCKET sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len);//建立一个新的套接字用于通信，不是前面的监听套接字

        char sendBuf[];

        sprintf(sendBuf,"Server IP is:%s",

            inet_ntoa(addrClient.sin_addr));//inet_nota函数是将字符转换成ip地址

        char recvBuf[];

        recv(sockConn,recvBuf,,);//服务器从客户端接受数据

        printf("%s\n",recvBuf);

        if(strcmp(recvBuf,"Reconnect")==)

        {

            Sleep();

            strcpy(sendBuf,"Finished");

            send(sockConn,sendBuf,strlen(sendBuf)+,);//服务器向客户端发送数据

        }

        closesocket(sockConn);//关闭socket

    }

}

#include <netinet/in.h>    // for sockaddr_in

#include <sys/types.h>    // for socket

#include <sys/socket.h>    // for socket

#include <stdio.h>        // for printf

#include <stdlib.h>        // for exit

#include <string.h>        // for bzero

/*

 #include <sys/types.h>

 #include <sys/stat.h>

 #include <fcntl.h>

 #include <unistd.h>

 */

#define HELLO_WORLD_SERVER_PORT    6001

#define BUFFER_SIZE 1024

#define FILE_NAME_MAX_SIZE 512

int main(int argc, char **argv)

{

    //设置一个socket地址结构client_addr,代表客户机internet地址, 端口

    struct sockaddr_in client_addr;

    bzero(&client_addr,sizeof(client_addr)); //把一段内存区的内容全部设置为0

    client_addr.sin_family = AF_INET;    //internet协议族

    client_addr.sin_addr.s_addr = htons(INADDR_ANY);//INADDR_ANY表示自动获取本机地址

    client_addr.sin_port = htons();    //0表示让系统自动分配一个空闲端口

    //创建用于internet的流协议(TCP)socket,用client_socket代表客户机socket

    int client_socket = socket(AF_INET,SOCK_STREAM,);

    if( client_socket < )

    {

        printf("Create Socket Failed!\n");

        exit();

    }

    //把客户机的socket和客户机的socket地址结构联系起来

    if( bind(client_socket,(struct sockaddr*)&client_addr,sizeof(client_addr)))

    {

        printf("Client Bind Port Failed!\n");

        exit();

    }

    //设置一个socket地址结构server_addr,代表服务器的internet地址, 端口

    struct sockaddr_in server_addr;

    bzero(&server_addr,sizeof(server_addr));

    server_addr.sin_family = AF_INET;

    if(inet_aton("192.168.1.149",&server_addr.sin_addr) == ) //服务器的IP地址来自程序的参数

    {

        printf("Server IP Address Error!\n");

        exit();

    }

    server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);

    socklen_t server_addr_length = sizeof(server_addr);

    //向服务器发起连接,连接成功后client_socket代表了客户机和服务器的一个socket连接

    if(connect(client_socket,(struct sockaddr*)&server_addr, server_addr_length) < )

    {

        printf("Can Not Connect To %s!\n",argv[]);

        exit();

    }

    char buffer[BUFFER_SIZE];

    bzero(buffer,BUFFER_SIZE);

    strcpy(buffer, "Reconnect");

    //向服务器发送buffer中的数据

    send(client_socket,buffer,BUFFER_SIZE,);

    //从服务器接收数据到buffer中

    bzero(buffer,BUFFER_SIZE);

    int length = ;

    if(recv(client_socket,buffer,BUFFER_SIZE,)>)

    {

        printf("Received %s\n",buffer);

    }

    //关闭socket

    close(client_socket);

    return ;

}