Domain Resolution :: Winsock

Hi.

I have a questions about resolving an IP into its domain name and vice versa. For example,

IP: 66.218.71.84
Domain: w5.scd.yahoo.com

I am familiar with a solution for the example above. However, there are some IP that I cannot get the domain names. For example and this is something I am making up.

IP: 28.116.90.40
Domain: CORENT_WIN2k

When I try to resolve 28.116.90.40 using the solution I currently use, the winsock API function returns 28.116.90.40 instead of CORENT_WIN2k. The only program I know that returns the corrent domain name is mIRC (a chat program).

I use getaddrinfo() and getnameinfo(). Again, the solution works well except for some weird IP addresses similar to the one I made up.

I would like to know is there a parameter somewhere for getaddrinfo() and/or getnameinfo() that will solve the solution example? Or maybe is there another technique?

Thanks,
Kuphryn

I don't have a reason for you but I have seen that in the past. It's a reverse lookup thing at the DNS isn't it? getaddrinfo and getnameinfo hit a DNS don't they? does it somehow depend on what DNS you're trying to hit? Perhaps the IRC is hitting the IRC server's DNS for the info?

I am not sure what algorithm is in mIRC for resolving domain names.

Kuphryn

well the methods you mentioned are the only one's I've seen for winsock. It seems plausable the IRC has a server that will do the DNS lookup for you. As far as I know, you can only ask your own DNS directly.

Ahhhh. Interesting. Thanks for the insight.

Kuphryn

disposable insight. possibly incorrect insight. But any time!