bug#15610: 24.3; Implement (network-interface-list) on Windows

bug#15610: 24.3; Implement (network-interface-list) on Windows

[Lubos Pintes]

When I googled about mentioned function, I saw a discussion where
someone stated that it is not possible on Windows for reason I am unable
to remember now.
Now I ran Cygwin version of Emacs and the function is implemented
there. So, it is definitely possible to implement it somehow on Windows.
If not, then please implement it so that it returns nil, or in similar way.


In GNU Emacs 24.3.1 (i386-mingw-nt6.1.7601)
  of 2013-03-17 on MARVIN
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
  `configure --with-gcc (4.7) --cflags
  -ID:/devel/emacs/libs/libXpm-3.5.8/include
  -ID:/devel/emacs/libs/libXpm-3.5.8/src
  -ID:/devel/emacs/libs/libpng-dev_1.4.3-1/include
  -ID:/devel/emacs/libs/zlib-dev_1.2.5-2/include
  -ID:/devel/emacs/libs/giflib-4.1.4-1/include
  -ID:/devel/emacs/libs/jpeg-6b-4/include
  -ID:/devel/emacs/libs/tiff-3.8.2-1/include
  -ID:/devel/emacs/libs/gnutls-3.0.9/include
  -ID:/devel/emacs/libs/libiconv-1.13.1-1-dev/include
  -ID:/devel/emacs/libs/libxml2-2.7.8/include/libxml2'

Important settings:
   value of $LANG: SKY
   locale-coding-system: cp1250
   default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
   tooltip-mode: t
   mouse-wheel-mode: t
   tool-bar-mode: t
   menu-bar-mode: t
   file-name-shadow-mode: t
   global-font-lock-mode: t
   font-lock-mode: t
   blink-cursor-mode: t
   auto-composition-mode: t
   auto-encryption-mode: t
   auto-compression-mode: t
   line-number-mode: t
   transient-mark-mode: t

Recent input:
q <up> <up> M-x r e p o r t - e m a <tab> <left> <left>
<right> <right> <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
user-error: Beginning of history; no preceding item

Load-path shadows:
c:/emacs/site-lisp/emacspeak/lisp/tetris hides c:/emacs/lisp/play/tetris

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
mail-prsvr mail-utils magit-autoloads info easymenu
git-rebase-mode-autoloads git-commit-mode-autoloads finder-inf package
time-date tooltip ediff-hook vc-hooks lisp-float-type mwheel dos-w32
ls-lisp w32-common-fns disp-table w32-win w32-vars tool-bar dnd fontset
image regexp-opt fringe tabulated-list newcomment lisp-mode register
page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock
font-lock syntax facemenu font-core frame cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew
greek romanian slovak czech european ethiopic indian cyrillic chinese
case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer loaddefs
button faces cus-face macroexp files text-properties overlay sha1 md5
base64 format env code-pages mule custom widget hashtable-print-readable
backquote make-network-process w32 multi-tty emacs)

bug#15610: 24.3; Implement (network-interface-list) on Windows

[Eli Zaretskii]

> Date: Mon, 14 Oct 2013 18:46:25 +0200
> From: Lubos Pintes <lubos.pintes@gmail.com>
> 
> When I googled about mentioned function, I saw a discussion where
> someone stated that it is not possible on Windows for reason I am unable
> to remember now.
> Now I ran Cygwin version of Emacs and the function is implemented
> there. So, it is definitely possible to implement it somehow on Windows.

The Cygwin library code for this is in net.cc.  Volunteers are welcome
to lift it from there into some w32*.c file inside Emacs.

Btw, it would be nice to hear some use case where this functionality
is really important.  TIA.

bug#15610: 24.3; Implement (network-interface-list) on Windows

[Eli Zaretskii]

> Date: Mon, 14 Oct 2013 20:20:57 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 15610@debbugs.gnu.org
> 
> The Cygwin library code for this is in net.cc.  Volunteers are welcome
> to lift it from there into some w32*.c file inside Emacs.

Of course, the necessary paperwork needs to be done, as the Cygwin
code is copyrighted by RH.

bug#15610: 24.3; Implement (network-interface-list) on Windows

[Glenn Morris]

Eli Zaretskii wrote:

>> Date: Mon, 14 Oct 2013 20:20:57 +0300
>> From: Eli Zaretskii <eliz@gnu.org>
>> Cc: 15610@debbugs.gnu.org
>> 
>> The Cygwin library code for this is in net.cc.  Volunteers are welcome
>> to lift it from there into some w32*.c file inside Emacs.
>
> Of course, the necessary paperwork needs to be done, as the Cygwin
> code is copyrighted by RH.

Red Hat has a general assignment for all contributions to FSF projects,
so you'd "just" need to convince them to contribute this to Emacs.
(But I imagine it's less hassle to reimplement it.)

AFAIK (which is not very far), the "ipconfig" utility on MS Windows
returns the relevant network info, so anyone who actually needs this
info could just call that from Emacs and parse the result.

bug#15610: 24.3; Implement (network-interface-list) on Windows

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Cc: lubos.pintes@gmail.com,  15610@debbugs.gnu.org
> Date: Mon, 14 Oct 2013 23:41:35 -0400
> 
> Eli Zaretskii wrote:
> 
> >> Date: Mon, 14 Oct 2013 20:20:57 +0300
> >> From: Eli Zaretskii <eliz@gnu.org>
> >> Cc: 15610@debbugs.gnu.org
> >> 
> >> The Cygwin library code for this is in net.cc.  Volunteers are welcome
> >> to lift it from there into some w32*.c file inside Emacs.
> >
> > Of course, the necessary paperwork needs to be done, as the Cygwin
> > code is copyrighted by RH.
> 
> Red Hat has a general assignment for all contributions to FSF projects,
> so you'd "just" need to convince them to contribute this to Emacs.

Thanks, this is good to know.

> (But I imagine it's less hassle to reimplement it.)

Right, so I just went away and did it in trunk revision 114686.

> AFAIK (which is not very far), the "ipconfig" utility on MS Windows
> returns the relevant network info

It comes close, but not all the way.

I'm closing this bug.