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Date: Mon, 7 Jul 2014 10:41:10 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Minires truncates host names
Message-ID: <20140707084110.GF1803@calimero.vinschen.de>
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References: <028c01cf9974$ad507120$07f15360$@alum.mit.edu>
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On Jul  6 19:47, Pierre A. Humblet wrote:
> > -----Original Message-----
> > From: D. Boland
> > Sent: Sunday, July 06, 2014 03:08
> >=20
> > Thanks for the swift reply!
> >=20
> > I looked at Sendmails' source code. Here's the snippet which produces=
=20
> > the output from my first email. It's taken from the file
> sendmail/domain.c:
> >=20
> >                         sm_dprintf("dns_getcanonname: trying %s.%s
> (%s)\n",
> >                                 host, *dp, # if NETINET6
> >                                 qtype =3D=3D T_AAAA ? "AAAA" :
> > # endif /* NETINET6 */
> >                                 qtype =3D=3D T_A ? "A" :
> >                                 qtype =3D=3D T_MX ? "MX" :
> >                                 "???");
> >                 errno =3D 0;
> >                 ret =3D res_querydomain(host, *dp, C_IN, qtype,
> >                                       answer.qb2, sizeof(answer.qb2));
> >=20
> >=20
> > As you can see, it first prints the host to be looked up, and then=20
> > passes the string unaltered to res_querydomain.
> >=20
>=20
> You are right, there is a bug in res_querydomain,=20
> Line 737 *(ptr++ - 1) =3D '.';   should be
> *ptr++ =3D '.';
>=20=20
> I would also add a debug printf at the top of the function:
> DPRINTF(statp->options & RES_DEBUG, "querydomain \"%s\"  \"%s\" type %d\n=
",
> Name, DomName, Type);
>=20
> Unfortunately I am not setup to build Cygwin so I can't test the above nor
> submit a proper patch.

I've checked that in.  I also changed the debug output to print
"Resolv" instead of "Minires" to make sure that people don't think
they are stil using the external Minres lib.


Thanks,
Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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