GNU bug report logs - #40343
28.0.50; dns-set-servers fails on IPv6 available Windows

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Package: emacs;

Reported by: Kazuhiro Ito <kzhr <at> d1.dion.ne.jp>

Date: Tue, 31 Mar 2020 08:48:01 UTC

Severity: normal

Found in version 28.0.50

Fixed in version 28.1

Done: Robert Pluim <rpluim <at> gmail.com>

Bug is archived. No further changes may be made.

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From: Kazuhiro Ito <kzhr <at> d1.dion.ne.jp>
To: 40343 <at> debbugs.gnu.org
Subject: bug#40343: 28.0.50; dns-set-servers fails on IPv6 available Windows
Date: Tue, 31 Mar 2020 17:46:47 +0900

dns-set-servers function fails to set dns-servers on Windows with IPv6
available network.

(progn
  (require 'dns)
  (dns-set-servers)
  dns-servers)

-> (nil)

The reason is that Windows's nslookup program returns server's IPv6
address if availeble but dns-set-servers function assumes that
server's address is always IPv4.

> C:\>nslookup localhost
> サーバー:  server.lan
> Address:  xxxx:xxxx:xxxx::1
>
> 名前:    localhost.lan
> Addresses:  ::1
>           127.0.0.1

# "サーバー" and "名前" are Japanese translations for "Server" and
# "Name", respectively.

From dns-set-servers definition in lisp/net/dns.el

> (re-search-forward
>  "^Address:[ \t]*\\([0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+\\)" nil t)

-- 
Kazuhiro Ito
This bug report was last modified 5 years and 104 days ago.

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