#include <afxsock.h>
int GetIPAddr(LPCSTR hostname)
{
int nAdapter = 0;
if(AfxSocketInit())
{
HOSTENT *pHostEnt = gethostbyname(hostname);
if(pHostEnt)
{
if(pHostEnt->h_addrtype == AF_INET)
{
TRACE("[%s] Official name= [%s]
", hostname, pHostEnt->h_name);
while ( pHostEnt->h_addr_list[nAdapter] )
{
in_addr *pAddr = (in_addr*)pHostEnt->h_addr_list[nAdapter];
// pHostEnt->h_addr_list[nAdapter] -the current address in host order
TRACE("IP(%d):%s
", nAdapter+1, inet_ntoa(*pAddr));
nAdapter++;
}
}
}
else
{
int iErr = WSAGetLastError();
ASSERT(FALSE);
}
}
return nAdapter;
}
BOOL GetHostByAddr(LPCSTR lpszIP)
{
if(AfxSocketInit())
{
unsigned long cPeer = inet_addr(lpszIP);
HOSTENT *pHostEnt = gethostbyaddr((char*)&cPeer, 4, AF_INET);
if(pHostEnt)
{
TRACE("IP [%s] host name = [%s]
", lpszIP, pHostEnt->h_name);
return TRUE;
}
else
{
int iErr = WSAGetLastError();
ASSERT(FALSE);
}
}
return FALSE;
}
//
GetIPAddr( "www.sina.com.cn" );
GetHostByAddr( "192.168.0.91" );
//
[www.sina.com.cn] Official name= [auriga.sina.com.cn]
IP(1):61.172.201.194
IP(2):61.172.201.195