From: DENIES, SABINE (SABINE) <sabine.denies_at_alcatel-lucent.com>
Date: Tue, 23 Aug 2011 08:37:41 +0200

I noticed that the 'ARES_ENODATA Response' is not in line with RFC 2308 - Negative Caching of DNS Queries.
According that RFC next algorithm should apply:
IF RCODE = 0
AND
ANSWER SECTION = Empty
AND
( AUTHORITY SECTION = Empty OR AUTHORITY SECTION contains SOA Record )
THEN
NO DATA
Ref: RFC 2308, Chapter 2.2, paragraph 4

And currently the following is implemented:
switch (rcode)
        {
        case NOERROR:
          status = (ancount > 0) ? ARES_SUCCESS : ARES_ENODATA;
          break;

Or do I overlook something?
If my interpretation is correct, could this be taken into account for a next C-Ares version?

Thank you.
Received on 2011-08-23