Re: [lwip-users] dns: remember multiple IP addresses patch

[address@hidden]

On 21.02.2018 17:18, Jan Menzel wrote:
> Hi all!
>         I'd like to share a small patch with you that allows the dns subsystem
> to remember and handle more then one IP address from response messages.
> It basically parses out all IP address and stores them in an array. It
> then returns a random entry.

What is this used for? A good DNS server should sort the IP address list 
of a host differently for each request.

If you want your client application to load-balance although the locally 
cached DNS entry has expired, I think a better approach would be to 
actually return all available IPs to the client and let it chose one 
(i.e. implement the random algorithm in your application). That way, 
'gethostbyname' etc. could return all entries as well.

Simon