* Feature request: TCP DNS support
@ 2018-01-04 0:05 Stefan Fröberg
2018-01-04 0:33 ` Szabolcs Nagy
2018-01-04 1:31 ` Rich Felker
0 siblings, 2 replies; 6+ messages in thread
From: Stefan Fröberg @ 2018-01-04 0:05 UTC (permalink / raw)
To: musl
Dear Sir
I have managed to compile my own, statically linked, portable little
browser that uses musl and QtWebKit.
Initial tests looks good but when testing encrypted DNS-over-TLS (which
needs TCP instead of UDP) with my system,
I could get nowhere.
So I guess musl does not yet support TCP DNS ?
Could you please add support for passing TCP DNS requests too with musl ?
It's all the rage now that Android has added support for it and the
DNS-over-TLS
standard starts to be finished, if not already finished.
Very Best Regards
Stefan Fröberg
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Feature request: TCP DNS support
2018-01-04 0:05 Feature request: TCP DNS support Stefan Fröberg
@ 2018-01-04 0:33 ` Szabolcs Nagy
2018-01-04 0:36 ` Szabolcs Nagy
2018-01-04 1:31 ` Rich Felker
1 sibling, 1 reply; 6+ messages in thread
From: Szabolcs Nagy @ 2018-01-04 0:33 UTC (permalink / raw)
To: musl
* Stefan Fröberg <stefan.froberg@petroprogram.com> [2018-01-04 02:05:06 +0200]:
> So I guess musl does not yet support TCP DNS ?
>
> Could you please add support for passing TCP DNS requests too with musl ?
even if musl supported it how would you select this option?
there is no documented interface in the libc to do that.
you can run a local nameserver with whatever configuration
instead and make the libc use that.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Feature request: TCP DNS support
2018-01-04 0:33 ` Szabolcs Nagy
@ 2018-01-04 0:36 ` Szabolcs Nagy
2018-01-04 12:51 ` Stefan Fröberg
0 siblings, 1 reply; 6+ messages in thread
From: Szabolcs Nagy @ 2018-01-04 0:36 UTC (permalink / raw)
To: musl
* Szabolcs Nagy <nsz@port70.net> [2018-01-04 01:33:08 +0100]:
> * Stefan Fröberg <stefan.froberg@petroprogram.com> [2018-01-04 02:05:06 +0200]:
> > So I guess musl does not yet support TCP DNS ?
> >
> > Could you please add support for passing TCP DNS requests too with musl ?
>
> even if musl supported it how would you select this option?
> there is no documented interface in the libc to do that.
>
sorry, glibc has a use-vc option in resolv.conf so there is api
for it and in principle musl could support that.
> you can run a local nameserver with whatever configuration
> instead and make the libc use that.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Feature request: TCP DNS support
2018-01-04 0:36 ` Szabolcs Nagy
@ 2018-01-04 12:51 ` Stefan Fröberg
0 siblings, 0 replies; 6+ messages in thread
From: Stefan Fröberg @ 2018-01-04 12:51 UTC (permalink / raw)
To: Szabolcs Nagy; +Cc: musl
Hello Szabolcs Nagy
Szabolcs Nagy kirjoitti 04.01.2018 klo 02:36:
> * Szabolcs Nagy <nsz@port70.net> [2018-01-04 01:33:08 +0100]:
>> * Stefan Fröberg <stefan.froberg@petroprogram.com> [2018-01-04 02:05:06 +0200]:
>>> So I guess musl does not yet support TCP DNS ?
>>>
>>> Could you please add support for passing TCP DNS requests too with musl ?
>> even if musl supported it how would you select this option?
>> there is no documented interface in the libc to do that.
>>
> sorry, glibc has a use-vc option in resolv.conf so there is api
> for it and in principle musl could support that.
>
>
Yes, I found out that long undocumented glibc option just resently too
and was wondering if
musl has something similar to force TCP DNS mode.
Best regards
Stefan Fröbreg
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Feature request: TCP DNS support
2018-01-04 0:05 Feature request: TCP DNS support Stefan Fröberg
2018-01-04 0:33 ` Szabolcs Nagy
@ 2018-01-04 1:31 ` Rich Felker
2018-01-04 12:55 ` Stefan Fröberg
1 sibling, 1 reply; 6+ messages in thread
From: Rich Felker @ 2018-01-04 1:31 UTC (permalink / raw)
To: musl
On Thu, Jan 04, 2018 at 02:05:06AM +0200, Stefan Fröberg wrote:
> Dear Sir
>
> I have managed to compile my own, statically linked, portable little
> browser that uses musl and QtWebKit.
>
> Initial tests looks good but when testing encrypted DNS-over-TLS (which
> needs TCP instead of UDP) with my system,
> I could get nowhere.
> So I guess musl does not yet support TCP DNS ?
>
> Could you please add support for passing TCP DNS requests too with musl ?
>
> It's all the rage now that Android has added support for it and the
> DNS-over-TLS
> standard starts to be finished, if not already finished.
The supported way to do this with musl is via a nameserver on
localhost responding to udp queries and performing whatever backend
queries you want it to do. This (having a ns on localhost) is
fundamentally necessary for meaningful DNSSEC support anyway, too.
Even if musl did TCP itself, that wouldn't help you get DNS-over-TLS;
for that you would need a TLS stack in libc. And you really don't want
that.
Rich
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Feature request: TCP DNS support
2018-01-04 1:31 ` Rich Felker
@ 2018-01-04 12:55 ` Stefan Fröberg
0 siblings, 0 replies; 6+ messages in thread
From: Stefan Fröberg @ 2018-01-04 12:55 UTC (permalink / raw)
To: Rich Felker; +Cc: musl
Hello Rich
Rich Felker kirjoitti 04.01.2018 klo 03:31:
> On Thu, Jan 04, 2018 at 02:05:06AM +0200, Stefan Fröberg wrote:
>> Dear Sir
>>
>> I have managed to compile my own, statically linked, portable little
>> browser that uses musl and QtWebKit.
>>
>> Initial tests looks good but when testing encrypted DNS-over-TLS (which
>> needs TCP instead of UDP) with my system,
>> I could get nowhere.
>> So I guess musl does not yet support TCP DNS ?
>>
>> Could you please add support for passing TCP DNS requests too with musl ?
>>
>> It's all the rage now that Android has added support for it and the
>> DNS-over-TLS
>> standard starts to be finished, if not already finished.
> The supported way to do this with musl is via a nameserver on
> localhost responding to udp queries and performing whatever backend
> queries you want it to do. This (having a ns on localhost) is
> fundamentally necessary for meaningful DNSSEC support anyway, too.
>
> Even if musl did TCP itself, that wouldn't help you get DNS-over-TLS;
> for that you would need a TLS stack in libc. And you really don't want
> that.
>
> Rich
Oh, but doesn't OpenSSL handle the encryption, aka TLS part ?
What source files in musl now currently handle the namelookup ?
Best regards
Stefan Fröbreg
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2018-01-04 12:55 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-01-04 0:05 Feature request: TCP DNS support Stefan Fröberg
2018-01-04 0:33 ` Szabolcs Nagy
2018-01-04 0:36 ` Szabolcs Nagy
2018-01-04 12:51 ` Stefan Fröberg
2018-01-04 1:31 ` Rich Felker
2018-01-04 12:55 ` Stefan Fröberg
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