GNU bug report logs - #26820
26.0.50; DNS mode and IPv6 reverse zones

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: peder <at> klingenberg.no (Peder O. Klingenberg)
To: bug-gnu-emacs <at> gnu.org
Subject: 26.0.50; DNS mode and IPv6 reverse zones
Date: Sun, 07 May 2017 20:51:03 +0200

Last week I was trying to set up reverse delegations for some newly
assigned IPv6 address space.  It was... painful.

IPv6 addresses are ugly enough in their normal format, but when used in
a reverse zone, they need to be converted to individual nibbles
separated by dots, reversed, and have .ip6.arpa. appended.  The result
is less than human friendly.

So I've written a new feature for dns-mode.el that allows me to mostly
relate to the normal IPv6 format, and convert automatically to the
nibble format.  I can for instance do this in a (part of a) zone file,
where I'm only interested in defining hosts in the last 16 bits of the
address:

$ORIGIN 2a0a:3dc0:10::/112
::1/-112 IN PTR www.example.com.

And then, by pressing C-c C-e on each of the IPv6 addresses, end up with
the necessary

$ORIGIN 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.0.0.0.c.d.3.a.0.a.2.ip6.arpa. 
1.0.0.0 IN PTR www.example.com.

Assuming I'm doing this as I type, I can then yank the last
standard-format address, do a minimal edit, C-c C-e again, and continue
typing to define the next PTR record.

I'm hoping this sounds useful to other people as well.  I'll pass along
the patch as soon as I get a bug# to attach to it. :)

Message #10 received at 26820 <at> debbugs.gnu.org (full text, mbox):

From: peder <at> klingenberg.no (Peder O. Klingenberg)
To: 26820 <at> debbugs.gnu.org
Subject: Re: bug#26820: 26.0.50; DNS mode and IPv6 reverse zones
Date: Sun, 07 May 2017 20:58:59 +0200

[Message part 1 (text/plain, inline)]

peder <at> klingenberg.no (Peder O. Klingenberg) writes:

> I'll pass along the patch as soon as I get a bug# to attach to it. :)

As promised, here's the patch.  I even wrote tests, which is a first for
me.  I couldn't find dns-mode documented in any manual, so I haven't
written any info docs, but the docstrings should hopefully give enough
information to use the feature.

[0001-Command-to-convert-IPv6-addresses-in-zone-files.patch (text/x-patch, attachment)]

Message #15 received at 26820 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: peder <at> klingenberg.no (Peder O. Klingenberg)
Cc: 26820 <at> debbugs.gnu.org
Subject: Re: bug#26820: 26.0.50; DNS mode and IPv6 reverse zones
Date: Sat, 20 May 2017 20:22:59 -0400

Thanks, but:
    
    In dns-mode-reverse-and-expand-ipv6:
    ~/dns-mode.el:330:41:Warning: reference to free variable ‘with’
    ~/dns-mode.el:330:46:Warning: reference to free variable ‘filler-done’
    ~/dns-mode.el:330:58:Warning: reference to free variable ‘=’
    ~/dns-mode.el:331:41:Warning: reference to free variable ‘for’
    ~/dns-mode.el:331:45:Warning: reference to free variable ‘chunk’
    ~/dns-mode.el:331:51:Warning: reference to free variable ‘in’
    ~/dns-mode.el:332:41:Warning: reference to free variable ‘if’
    ~/dns-mode.el:334:41:Warning: reference to free variable ‘append’
    ~/dns-mode.el:335:58:Warning: reference to free variable ‘repeat’
    ~/dns-mode.el:336:58:Warning: reference to free variable ‘collect’
    ~/dns-mode.el:337:56:Warning: assignment to free variable ‘filler-done’
    ~/dns-mode.el:338:41:Warning: reference to free variable ‘else’
    ~/dns-mode.el:346:17:Warning: reference to free variable ‘char’
    ~/dns-mode.el:346:22:Warning: reference to free variable ‘across’
    ~/dns-mode.el:347:13:Warning: reference to free variable ‘do’
    
    In end of data:
    ~/dns-mode.el:360:1:Warning: the following functions are not known to be
        defined: loop, minusp

which is due to using stuff from cl.el without requiring it.
And in any case, the cl-lib versions should be used instead these days.
Please could you revise that? TIA.

Message #18 received at 26820 <at> debbugs.gnu.org (full text, mbox):

From: peder <at> klingenberg.no (Peder O. Klingenberg)
To: Glenn Morris <rgm <at> gnu.org>
Cc: 26820 <at> debbugs.gnu.org
Subject: Re: bug#26820: 26.0.50; DNS mode and IPv6 reverse zones
Date: Sun, 21 May 2017 21:56:32 +0200

[Message part 1 (text/plain, inline)]

Glenn Morris <rgm <at> gnu.org> writes:

> And in any case, the cl-lib versions should be used instead these days.
> Please could you revise that? TIA.

Revised patch attached, using the cl-lib versions.  dns-mode.el now
compiles without warnings in emacs -Q.  Thank you for taking an
interest.

[0001-Command-to-convert-IPv6-addresses-in-zone-files.patch (text/x-patch, attachment)]

Message #23 received at 26820-done <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: 26820-done <at> debbugs.gnu.org
Subject: Re: bug#26820: 26.0.50; DNS mode and IPv6 reverse zones
Date: Tue, 23 May 2017 20:36:04 -0400

Version: 26.1

Thanks; tweaked and applied as 8f6550b.

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