AF_INET in win xp vs AF_INET6 in win 7

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Hi all

i wrote a code in sample application.

C++

char            szHostName[255];
int iEc   = -1;
addrinfo* pAdInfo = NULL;

                // get the local hostname
if( gethostname(szHostName, 255) == SOCKET_ERROR )
{
    return ;
}

CString sTmp(szHostName);
::AfxMessageBox(sTmp);
iEc = getaddrinfo(szHostName, NULL, NULL, &pAdInfo);
if( S_OK == iEc )
{
    sTmp.Format(_T("family[%d]"),pAdInfo->ai_family);
    ::AfxMessageBox(sTmp);
}

It gives different family in window 7 and different family in window XP
win 7 : AF_INET6
win xp; AF_INET

my question how can i can get the same ip4 in both.

thankyou

Posted 31-Dec-13 1:58am

kaushik4study

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Jochen Arndt · Accepted Answer · 2013-12-31T03:38:00

Pass an addrinfo structure to specify the type (IPv4 or IPv6). See the getaddrinfo()[^] function and the addrinfo[^] structure. When passing no addrinfo structure or setting the ai_family member to AF_UNSPEC, the returned family type is IPv6 when it is installed (always with Vista and later).