[Fwd: Re: [SQU] IP address cycling]

attached mail follows:

I initially wrote:
> > I would really like to stop the IP address cycling mechanism
> > when a DNS lookup returns more than one IP address for a single
> > FQDN. Maybe this seems a strange request, but I am in a very
> > controlled environment (large intranet) and have already sorted
> > my addresses using "sortlist" in Bind.

Henrik Nordstrom wrote:
> AFAIC there is no option for disabling the IP cycling.

Thank you for this info, I suspected as much but it was good
to have it confirmed before setting off on a wild goose chase.
 
> Patching the code should be safe. But please keep in mind that it is
> also the function that makes Squid jump to the next IP if the first
> fails to respond, so you better only remove the relevant call to the
> function, and not the function itself..

This was just the sort of info I required. The patch I prepared
should be attached. I had to do more than I thought I would because
my initial patch and testing showed me that I needed to start at the
end of the IP array and work backwards to maintain the order of
sorting created by Bind. The patch therefore means that cycling
does not occur unless a bad address is found and the order of the
addresses tried is the same as those presented by the nameserver.

Hope it helps someone else.
/dan

-- 
Daniel Sutcliffe - Network Architect(+), CYRANO
"I started out with nothing...
 I still have most of it left."

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