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Re: Bug that needs fixing

From: Michael Albinus
Subject: Re: Bug that needs fixing
Date: Sun, 26 Jun 2005 22:13:04 +0200
User-agent: Gnus/5.110004 (No Gnus v0.4) Emacs/22.0.50 (gnu/linux)

Richard Stallman <address@hidden> writes:

> Would you please fix this bug?  It needs to be done.
> Or is it fixed already?
> ** Ange-ftp should ignore irrelevant IPv6 errors:
> Message-Id: <address@hidden>
> From: "Piet van Oostrum" 
> To: address@hidden
> Subject: Ange-ftp can't deal with IPV6/IPV4 fallback
> Symptoms:
> C-x C-f /ftp.nluug.nl:/
> The problem is that the DNS first gives an IPV6 address. However our
> router doesn't do IPV6. Ftp then falls back to IPV4:
> ftp> open ftp.nluug.nl
> Trying 2001:610:1:80aa:192:87:102:36...
> ftp: connect to address 2001:610:1:80aa:192:87:102:36: No route to host
> Trying
> Connected to ftp.nluug.nl.
> Ange-ftp chokes on the `No route to host' message and doesn't look any
> further.
> I think in the near future we will see more of this problem, so it might be
> time to make anfe-ftp more intelligent.

I haven't seen code in ange-ftp or any ChangeLog entry solving this
problem. Unfortunately, I cannot reproduce the problem as
described. On my GNU/Linux machine, the ftp client doesn't try the
different IP addresses when IP6 is enabled. Instead of, it simply says

magdalene:~> ftp ftp.nluug.nl
ftp: connect: Invalid argument

Should be acceptable, because my router doesn't support IP6 either.

Checking the original poster's message, he was working with GNU Emacs (powerpc-apple-darwin7.2.0). I fear further analysis must
be done on such a system. Or somebody could provide me temporary
access to such a beast.

Best regards, Michael.

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