From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/3904 Path: news.gmane.org!not-for-mail From: Rich Felker Newsgroups: gmane.linux.lib.musl.general Subject: Re: dn_expand() confuses postfix Date: Wed, 14 Aug 2013 18:06:25 -0400 Message-ID: <20130814220625.GT221@brightrain.aerifal.cx> References: <20130814021920.7e719d8f@sibserver.ru> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1376517995 19549 80.91.229.3 (14 Aug 2013 22:06:35 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 14 Aug 2013 22:06:35 +0000 (UTC) To: musl@lists.openwall.com Original-X-From: musl-return-3908-gllmg-musl=m.gmane.org@lists.openwall.com Thu Aug 15 00:06:40 2013 Return-path: Envelope-to: gllmg-musl@plane.gmane.org Original-Received: from mother.openwall.net ([195.42.179.200]) by plane.gmane.org with smtp (Exim 4.69) (envelope-from ) id 1V9jDD-00073T-4I for gllmg-musl@plane.gmane.org; Thu, 15 Aug 2013 00:06:39 +0200 Original-Received: (qmail 30466 invoked by uid 550); 14 Aug 2013 22:06:38 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: Original-Received: (qmail 30458 invoked from network); 14 Aug 2013 22:06:37 -0000 Content-Disposition: inline In-Reply-To: <20130814021920.7e719d8f@sibserver.ru> User-Agent: Mutt/1.5.21 (2010-09-15) Xref: news.gmane.org gmane.linux.lib.musl.general:3904 Archived-At: On Wed, Aug 14, 2013 at 02:19:20AM +0800, orc wrote: > musl's dn_expand() confuses postfix - always returns 0, then postfix's > libdns.a gets wrong shifts and gives up with something like: > > ../test_dns_lookup: lookup yandex.ru type MX flags 2 > ../test_dns_lookup: dns_query: yandex.ru (MX): OK > ../test_dns_lookup: warning: dns_get_fixed: bad class: 30722 > ../test_dns_lookup: fatal: Name service error for name=yandex.ru type=MX: Malformed or unexpected name server reply > > If someone will face same error with postfix & musl, then get portable > dn_expand.c from > http://tclsysdns.googlecode.com/svn/trunk/unix/dn_expand.c and put it > in src/dns (edit Makefile.in to include src & obj). I've committed some fixes to this code. Please let me know if the issue persists; I did not have test cases to check that the return value is right, so there's a possibility it may be off-by-one or something. Rich