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IP address to host name

I have the IP address of a socket client connected to the TCP server. I need to know the name of the host connected. What is the best way to programatically find it on the server side?

Phiwi Moyo

here is the command you can use:
c:\ipconfig

Gerwin Jansen

nslookup IMHO

evilrix

http://pubs.opengroup.org/onlinepubs/009695399/functions/gethostbyaddr.html

gethostbyaddr, gethostbyname - network host database functions

These functions shall retrieve information about hosts.

sarabande

you could try to call gethostbyaddr if supported by your compiler. but the server not necessarily has a a name for a client address.

Sara

Infinity08

Actually, you should probably use the newer getnameinfo (the replacement for gethostbyaddr) :

http://beej.us/guide/bgnet/output/html/singlepage/bgnet.html#getnameinfoman

(at the very least in order to make your code ready for IPv6)

Gerwin Jansen

@evilrix - I'm sorry, missed that.

@olmuser - please ignore my remark.

ol muser

ASKER

@Infinity08: the code samples and methods by beej network guide sound promising. I am on windows platform. The headerfiles in the code samples, do they have windows equivalent?

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sarabande

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Infinity08

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