getip.cpp

得到多穴主机所有IP地址

/*
by wenyy
EMail:[e-mail]
homePage: [e-mail]
*/
#include "windows.h"
#include <winsock.h>
#include "stdio.h"
#include "stdlib.h"
#include "string.h"

void get_ip(void)
{// get multi-IP address
	char szHostName[128];
	char szT[20];
	if( gethostname(szHostName, 128) == 0 )
	{
		// Get host adresses	
		struct hostent * pHost;	int i; 
		pHost = gethostbyname(szHostName); 
		for( i = 0; pHost!= NULL && pHost->h_addr_list[i]!= NULL; i++ ) 	
		{
			 char str[100]; 		
			 char addr[20];
			 int j;  		
			 str[0]='\0';
			 LPCSTR psz=inet_ntoa (*(struct in_addr *)pHost->h_addr_list[i]);
			 printf("NO %d IP Address : %s\n",i+1,psz);
			 /*
			 for( j = 0; j < pHost->h_length; j++ ) 		
			 {
				//CString addr;  
				 addr[0]='0';
				if( j > 0 ) 				
					strcat(str,"."); 
 				sprintf(addr,"%u", (unsigned int)((unsigned char*)pHost->h_addr_list[i])[j]);			
				strcat(str,addr);
			 }*/
//			 printf("no %d : %s\n",i,str);
  		// str now contains one local IP address - do whatever you want to do with it (probably add it to a list)
 		}
	}
}
void print_ip(void)
{//only can get one IP address
      WORD wVersionRequested;
      WSADATA wsaData;
      char name[255];
      //CString ip;
      PHOSTENT hostinfo;
      wVersionRequested = MAKEWORD( 2, 0 );

      if ( WSAStartup( wVersionRequested, &wsaData ) == 0 )
      {

            if( gethostname ( name, sizeof(name)) == 0)
            {
                  if((hostinfo = gethostbyname(name)) != NULL)
                  {
                        LPCSTR ip = inet_ntoa (*(struct in_addr *)*hostinfo->h_addr_list);
						printf("%s\n",ip);
                  }
            }
            WSACleanup( );
      } 
}
void main(void)
{
	print_ip();
	get_ip();
}