VC实现将网址解析出所有ip地址的实例代码

时间:2022-06-01 17:11:10

通过调用gethostbyname 系统函数进行解析

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void GetHostNamebyIp(char* hostName)
{
    if(NULL == hostName)
    {
        return;
    }
    int WSA_return = 0;
  WSADATA WSAData;
    HOSTENT *host_entry;
    char szIP[1024] = {0};
 
    AfxMessageBox(hostName);
    WSA_return=WSAStartup(0x0202,&WSAData);
    if(0 == WSA_return)
    {
        host_entry = gethostbyname(hostName);
        if(0 != host_entry)
        {
            char** ipAddress = host_entry->h_addr_list;
            for(; *ipAddress != NULL; ipAddress++)
            {
                strcpy(szIP,inet_ntoa(*(LPIN_ADDR)*(ipAddress)));
                WriteIPFile("ip.txt",hostName ,szIP);
 
            }
        }
    }
 
 
}

将解析出来的ip地址写入到文件中

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//写文件,第一个参数文件名,第二个参数hostName,第三个参数文件内容
void WriteIPFile(char* FileName, char* hostName, char* text)
{
    
    HANDLE hFILE=CreateFile(FileName,GENERIC_WRITE,FILE_SHARE_READ,NULL,OPEN_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
  if(hFILE==INVALID_HANDLE_VALUE)
    {
        //文件创建失败
        return;
    }
     if(SetFilePointer(hFILE,0,NULL,FILE_END)==-1)
  {
    printf("SetFilePointer error\n");
    return ;
  }
 
  DWORD dwhostWrite;
  if(!WriteFile(hFILE,hostName,strlen(hostName),&dwhostWrite,NULL))
  {
    printf("WriteFile error\n");
    return ;
  }
     if(!WriteFile(hFILE,"\r\n",2,&dwhostWrite,NULL))
  {
    printf("WriteFile error\n");
    return ;
  }
 
  DWORD dwWrite;
  if(!WriteFile(hFILE,text,strlen(text),&dwWrite,NULL))
  {
    printf("WriteFile error\n");
    return ;
  }
     if(!WriteFile(hFILE,"\r\n",2,&dwWrite,NULL))
  {
    printf("WriteFile error\n");
    return ;
  }
  
  CloseHandle(hFILE);
 
 
}

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原文链接:https://blog.csdn.net/c_kongfei/article/details/115345319