bug#17976: 24.3; url-retrieve-synchronously doesn't fallback to IPv4

[Andreas Schwab]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Juliusz Chroboczek <jch@pps.univ-paris-diderot.fr> writes:
>
>> My machine has both IPv6 and IPv4.  I'm accessing a server that has both
>> IPv6 and IPv4, but whose web server listens on IPv4 only.  The web server
>> is doing the right thing, sending RST upon IPv6 connection attempts.  Wget
>> and telnet do the right thing, they fallback to IPv4:
>>
>>   $ telnet moule.informatique.univ-paris-diderot.fr 8080
>>   Trying 2001:660:3301:8070::40...
>>   Trying 194.254.199.40...
>>   Connected to moule.informatique.univ-paris-diderot.fr.
>>   Escape character is '^]'.
>
> Perhaps this should be a general network connection thing?

It needs to be fixed in open-network-stream.  Currently it doesn't
provide a way to fall back to a different address of a given host.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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