I have to program with Winsock recently, and have a problem when using function gethostbyname. I try to get IP by calling the function with domain name like this : gethostbyname("D2004.ddns.lala.com"); then I could get an IP Address. but this one is IP of a ddns server. How can I get the real IP of the server ? Should I try to contact with ddns server or Is there any function work for this purpose ?? Thanks for any help : )

Thanks for your reply, I try again and again but it still not work correctly.

This domain name is what I use for testing my program :
D7501.ddns.iview-ddns.com

Using gethostbyname() I will get ip "211.75.21.14", but the real ip I should get is "202.168.200.151".
Its strange because when using IE to connect http::\\D7501.ddns.iview-ddns.com, IE will connect to 202.168.200.151, it work perfectly. And this is why I still try to find another method.

Here is my simple testing code:

bool SocketStartUp(void)
{
WSADATA wsaData;

int Status = WSAStartup(MAKEWORD(2, 0), &wsaData);
if(Status)
return false;
return true;
}

bool SocketShutDown(void)
{
if(WSACleanup() == SOCKET_ERROR)
return false;
return true;
}

int main(int argc, char** argv)
{
if(SocketStartUp())
std::cout << "Start Success !!!" << std::endl;
else
{
std::cout << "Start Failed !!!" << std::endl;
return 1;
}

LPHOSTENT lphost(0);
lphost = gethostbyname("D7501.ddns.iview-ddns.com");
if(lphost)
{
in_addr addr;
std::string name;

addr.S_un.S_addr = ((LPIN_ADDR)lphost->h_addr)->s_addr;
name = inet_ntoa(addr);
std::cout << name << std::endl;

std::cout << lphost->h_addr_list[0] << std::endl;
}

SocketShutDown();
}

Thanks for any Help.

Thank you very much!!!

I have resolve this problem,
and my program could work correctly now.
After using the tool "Ethereal",
I send some message to server like IE does,
then the message that server replied have real IP I need.

Thank you for mentioning this helpful Tool.