获得本机的用户名及IP地址函数

来源：互联网发布：编程语言的都有啥编辑：程序博客网时间：2024/05/17 18:40

#include <cstdlib>#include <iostream>#include <conio.h>#include <stdio.h>#include <string.h>#include <winsock2.h> //Windows Sockets函数定义#include <stdlib.h>using namespace std;bool InitSocket(); //初始化Windows Sockets动态连接库#pragma comment(lib, "Ws2_32.lib")void GetIP(char ip[32]){     struct hostent  *hp;  struct in_addr  in;  char  hostname[32];  int id=0;// 用于网卡计数  *ip=0;  gethostname(hostname,31);//获得主机名  cout<<hostname<<endl;    if((hp=gethostbyname(hostname))==NULL)  {    printf("ERROR: unable get host '%s' ip\n",hostname);    return;  };       while(hp->h_addr_list[id]!=NULL)  {    memcpy(&in.s_addr,hp->h_addr_list[id],sizeof(in.s_addr));//cout<<inet_ntoa(in)<<endl;    strcpy(ip,inet_ntoa(in));   // printf("ip is %s\n",ip);    id++;  }};

如果在内网中，只能获得内网的IP地址~

下面是可用的服务器端程序，连接后会显示对方的IP地址，并将数据储存到txt中：

#include <cstdlib>#include <iostream>#include <conio.h>#include <stdio.h>#include <winsock2.h>#include <time.h>#include<ctime>bool InitSocket();using namespace std;#pragma comment(lib, "Ws2_32.lib")char ChangeIntToChar(int num){    char ch;    if (num<10&&num>=0)        ch=char(num+48);    if (num<=15&&num>=10)        ch=char(num+55);    return ch;}int main(int argc, char *argv[]){    struct sockaddr addr;    int len,off;    bool over;    char msg[255];    SOCKET sock ,sersock;    if ( !InitSocket() ) return 0; //初始化Window Sockets DLL(ws2_32.dll)    //创建流Socket：即传输层使用TCP    sock = socket( AF_INET,SOCK_STREAM,0 );    if ( sock==INVALID_SOCKET ) //不能创建，返回    {        printf("不能创建Socket!");        getch();        WSACleanup( ); //卸载Window Sockets DLL        return 0;    }    //设置IP地址和端口号    ((sockaddr_in*)&addr)->sin_family = AF_INET; //AF_INET:使用Internet 协议    ((sockaddr_in*)&addr)->sin_port = htons(8080); //服务器端口号3000    ((sockaddr_in*)&addr)->sin_addr.s_addr = inet_addr("192.168.1.14");//主机地址    //把套接字与地址绑定    bind(sock,&addr,sizeof(addr));    //监听网络连接    listen(sock,1); //监听连接：1--允许等待队列的长度    printf("等待客户连接!\n");    SOCKADDR_IN addrClient;    len = sizeof(addrClient);    //接受网络连接，生成新的套接字sersock标识这一连接    sersock = accept( sock,(SOCKADDR*)&addrClient,&len );    //从等待队列中检取客户，如队列空则进程挂起    //如不空，则接受并生成新Socket以表示此连接，而原Socket继续等待新客户    if (sersock==INVALID_SOCKET)    {        DWORD err = WSAGetLastError();        char txt[100];        sprintf(txt,"error when accept!---errno:%d",err);        printf(txt);        getch();        WSACleanup( ); //卸载Window Sockets DLL        return 0;    }    printf("有客户连接!\n");    cout<<"对方的地址为: "<<inet_ntoa(addrClient.sin_addr)<<endl;    cout<<endl;    int i=0;    char temp_L=0;    char temp_H=0;    char a,b;    int j;    char temp_data[300];    time_t now_time;    time_t last_time;    char Datashow[128];    char Timeshow[128];    time_t ltime;    FILE *fp;    fp=fopen("D://text.txt","w");    while (1)    {        cout<<"等待数据..."<<endl;        memset(msg,0,sizeof(msg));        memset(temp_data,0,sizeof(temp_data));        last_time= time(NULL);        len = recv ( sersock,msg,200,0 ); //接收用户信息        for ( i=0,j=0;i<len;i++)        {            temp_L=msg[i]&0x0f;            temp_H=msg[i]>>4;            temp_H=temp_H&0x0f;            a=ChangeIntToChar((int)temp_H);            b=ChangeIntToChar((int)temp_L);            temp_data[j++]=a;            temp_data[j++]=b;            cout<<a<<b<<" ";        }        cout<<endl;        cout<<temp_data<<endl;        now_time=time(NULL);        if ((now_time-last_time)<=0)            break;        _strdate( Datashow );        printf( "OS date:%s\n", Datashow ); //打印当前日期        fputs(Datashow,fp);        fputs("  ",fp);        _strtime( Timeshow );        printf( "OS time:%s\n", Timeshow ); //打印当前时间        fputs(Timeshow,fp);        fputs(" :   \n",fp);        fputs("\n当前数据是：",fp);        for (int m=0;m<j;m++)        {            fprintf(fp, "%c", temp_data[m]);            if (m%2!=0)            {                fputs(" ",fp);            }        }        fputs("\n\n",fp);    }    fclose(fp);    //关闭套接字    closesocket(sersock);    closesocket(sock);    WSACleanup( ); //卸载Window Sockets DLL    return 0;}bool InitSocket(){    WORD wVersionRequested;    WSADATA wsaData;    int err;    wVersionRequested = MAKEWORD( 2, 0 );    //初始化Windows Sockets DLL,    err = WSAStartup( wVersionRequested, &wsaData );//加载Winsock DLL到内存    if ( err != 0 )    {        printf("没有Windows Socket动态库!\n");        getch();        return false;    }    if ( LOBYTE( wsaData.wVersion ) != 2 || HIBYTE( wsaData.wVersion ) != 0 )    {        printf("需要Windows Socket 2!\n");        getch();        WSACleanup( ); //非winsock 2.0时，卸载Window Sockets DLL        return false;    }    return true;}

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