Date: Tue, 25 Aug 2020 00:04:44 +0200 From: Florian Weimer <fw@...eb.enyo.de> To: Rich Felker <dalias@...c.org> Cc: musl@...ts.openwall.com Subject: Re: Incompatible behaviour of res_query(3) w.r.t. NXDOMAIN * Rich Felker: > On Mon, Aug 24, 2020 at 11:04:49PM +0200, Florian Weimer wrote: >> * Rich Felker: >> >> > Hmm, I think in this case the "better" might be sufficient that we >> > want to keep it and pressure other implementations to change too. A >> > program performing a lookup where the result is NxDomain may very well >> > want to know whether that's an authenticated (by DNSSEC) NxDomain or >> > one in an insecure zone. Returning an error to the caller with no >> > packet contents discards this critical data. >> >> Isn't this the behavior you'd get with res_send? >> >> I think such error translation is precisely the point of the res_query >> convenience function (along with the implicit construction of the >> query packet). > > Does such a distinction exist? Yes, I think so. It's the behavior of the BIND 4 era stub resolver code.
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