Date: Fri, 9 Aug 2013 10:34:14 +0400 From: Pavel Timofeev <timp87@gmail.com> To: Gregory Shapiro <gshapiro@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: Re: Sendmail-8.14.7 doesn't work with MS DNS in IPv4 network Message-ID: <CAAoTqfuvud8rhtWqzFJAyGvqhUDVw-2-Z2c5pHTK%2BoizsXgbcA@mail.gmail.com> In-Reply-To: <CAAoTqfvxwFkPb_MVKEPeRW4s2S5oGUO-s0TFQR%2Bq5BvBUGTKyQ@mail.gmail.com> References: <CAAoTqfurC_A8EsSz=jz4Cpkxj1=JutVnYQ-rpaB5eVyshm1g8w@mail.gmail.com> <20130807160528.GC13555@minime.local> <CAAoTqfvxwFkPb_MVKEPeRW4s2S5oGUO-s0TFQR%2Bq5BvBUGTKyQ@mail.gmail.com>
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I agree with Mark Felder.
2013/8/8 Pavel Timofeev <timp87@gmail.com>:
> I tried to revert mentioned patch, i.e. applied this
>
> --- sendmail/conf.c.orig 2013-08-08 12:28:40.000000000 +0400
> +++ sendmail/conf.c 2013-08-08 12:31:17.000000000 +0400
> @@ -4294,12 +4294,7 @@
> #else /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) &&
> SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */
> int nmaps;
> # if NETINET6
> -# ifndef SM_IPNODEBYNAME_FLAGS
> - /* For IPv4-mapped addresses, use: AI_DEFAULT|AI_ALL */
> -# define SM_IPNODEBYNAME_FLAGS AI_ADDRCONFIG
> -# endif /* SM_IPNODEBYNAME_FLAGS */
> -
> - int flags = SM_IPNODEBYNAME_FLAGS;
> + int flags = AI_DEFAULT|AI_ALL;
> int err;
> # endif /* NETINET6 */
> char *maptype[MAXMAPSTACK];
>
> Sendmail started to work
>
> 2013/8/7 Gregory Shapiro <gshapiro@freebsd.org>:
>>> I found a problem in new FreeBSD 9.2-{BETA2,RC1} which uses Sendmail-8.14.7.
>>> If you try to send email from FreeBSD 9.2 in IPv4 network with MS DNS
>>> you won't receive it.
>>> But in same time email passes from FreeBSD 9.1-RELEASE which uses
>>> Sendmail-8.14.5.
>>
>> The recent release made the following change:
>>
>> --- sendmail/conf.c 25 Jan 2011 18:31:30 -0000 8.1168
>> +++ sendmail/conf.c 5 Apr 2013 17:39:09 -0000 8.1182
>> @@ -4726,7 +4726,12 @@
>> #else /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */
>> int nmaps;
>> # if NETINET6
>> - int flags = AI_DEFAULT|AI_ALL;
>> +# ifndef SM_IPNODEBYNAME_FLAGS
>> + /* For IPv4-mapped addresses, use: AI_DEFAULT|AI_ALL */
>> +# define SM_IPNODEBYNAME_FLAGS AI_ADDRCONFIG
>> +# endif /* SM_IPNODEBYNAME_FLAGS */
>> +
>> + int flags = SM_IPNODEBYNAME_FLAGS;
>> int err;
>> # endif /* NETINET6 */
>> char *maptype[MAXMAPSTACK];
>>
>> Which is described in this release note:
>>
>> Drop support for IPv4-mapped IPv6 addresses to prevent the MTA
>> from using a mapped address over a legitimate IPv6 address
>> and to enforce the proper semantics over the IPv6
>> connection. Problem noted by Ulrich Sporlein.
>>
>> It looks like that SERVFAIL from Microsoft's DNS server is getting
>> in the way of that. I can look at adding this exception to
>> WorkAroundBrokenAAAA as a possibility for a future release.
>>
>> I'd also like to hear feedback on whether the above change (changing
>> getipnodebyname() flags from 'AI_DEFAULT | AI_ALL' to 'AI_ADDRCONFIG' went
>> too far and what the accepted norm is for getipnodebyname().
>>
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