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From:	"Pierre A. Humblet" <Pierre DOT Humblet AT alum DOT mit DOT edu>
To:	"'D. Boland'" <daniel AT boland DOT nl>
Cc:	<cygwin AT cygwin DOT com>
References:	<53B85C0A DOT A51E8FA2 AT boland DOT nl>
In-reply-to:	<53B85C0A.A51E8FA2@boland.nl>
Subject:	RE: Minires truncates host names
Date:	Sat, 05 Jul 2014 17:37:12 -0400
Message-id:	<026e01cf9899$491058a0$db3109e0$@alum.mit.edu>
MIME-version:	1.0

> -----Original Message-----
> From: D. Boland
> Sent: Saturday, July 05, 2014 16:12
> 
> Hi Group,
> 
> I finally got Sendmail ported to Cygwin. But when looking up valid
hostnames
> from sender addresses, Minires fails. Here's the output, testing one of
> Sendmails' rules.
> 
> $ echo "check_mail daniel AT cygwin DOT com" | /usr/sbin/sendmail -d8.20 -bt
> readcf: option TrustedUser may cause problems on systems
>         which do not support fchown() if UseMSP is not set.
> ADDRESS TEST MODE (ruleset 3 NOT automatically invoked) Enter <ruleset>
> <address>
> > check_mail         input: daniel @ cygwin . com
> Basic_check_mail   input: daniel @ cygwin . com
> tls_client         input: $| MAIL
> TLS_connection     input:
> TLS_connection   returns:
> tls_client       returns:
> CanonAddr          input: < daniel @ cygwin . com >
> canonify           input: < daniel @ cygwin . com >
> Canonify2          input: daniel < @ cygwin . com >
> dns_getcanonname(cygwin.com, trymx=1)
> dns_getcanonname: trying cygwin.com. (A)
> Minires: query "cygwin.co." type 1
> Minires: DnsQuery: 9003 (Windows)
>         NO: errno=0, h_errno=1
> Canonify2        returns: daniel < @ cygwin . com >
> canonify         returns: daniel < @ cygwin . com >
> Parse0             input: daniel < @ cygwin . com >
> Parse0           returns: daniel < @ cygwin . com >
> CanonAddr        returns: daniel < @ cygwin . com >
> Basic_check_mail returns: $# error $@ 5 . 1 . 8 $: "553 Domain of sender
> address " "
> does not exist"
> check_mail       returns: $# error $@ 5 . 1 . 8 $: "553 Domain of sender
> address " "
> does not exist"
> >
> 
> As can be seen, Minires queries "cygwin.co.", not "cygwin.com." Is this a
> bug? Is there a way to test Minires lookups outside of Sendmail?

The Minires output above is produced at the top of the res_nquery function
by the following lines

int res_nquery( res_state statp, const char * DomName, int Class, int Type, 
695                 unsigned char * AnsPtr, int AnsLength) 
696 { 
697   u_char packet[PACKETSZ]; 
698   int len; 
699  
700   DPRINTF(statp->options & RES_DEBUG, "query \"%s\" type %d\n", DomName,
Type);  

To me it looks like the string was already truncated when it was passed to
the function.

You can test e.g. by using exim -d+resolver  -bt   daniel AT cygwin DOT com

It's wonderful that you got sendmail to work.

Pierre
 



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