round robin dns's and ip addresses

[Danny Mayer]

Barry Margolin wrote:
> In article <ddinf6$2370$1 at sf1.isc.org>,
>  "yawnmoth" <terra1024 at yahoo.com> wrote:
> 
> 
>>If a particular domain is using a round robin DNS and has 2+ IP
>>addresses associated with it, is there any way I could get a list of
>>all the IP addresses associated with the domain?  gethostbyname will
>>return one IP address, but I'd like all of them...
> 
> 
> gethostbyname() should return all of them.   The hostent.h_addr_list is 
> a NULL-terminated array containing all the addresses.  If you're using 
> hostent.h_addr, that's a macro that just refers to the first element of 
> the array, for backward compatibility with the original design of 
> gethostbyname(), which only returned one address.
> 

You mean IPv4 addresses. It won't return IPv6 addresses. For that you 
need to use getaddrinfo() which returns both.

Danny