Test your connectivity for World IPv6 Day

Stefan Neufeind neufeind at gmx.de
Wed Jun 1 18:32:48 CEST 2011

On 06/01/2011 06:28 PM, Guillaume.Leclanche at swisscom.com wrote:
>> The reason Chromium was "working" fine is because it was using IPv4 in
>> order to connect to the dual-stack sites included in eyechart. As
>> someone else pointed before, it would be good to have IPv4/IPv6
>> differentiation shown.
>> For everyone interested, from http://codereview.chromium.org/7029049
>> When a hostname has both IPv6 and IPv4 addresses, and the IPv6 address
>> is listed first, we start a timer (300ms) (deliberately chosen to be
>> different from the backup connect job). If the timer fires, that means
>> the IPv6 connect() hasn't completed yet, and we start a second socket
>> connect() where we give it the same AddressList, except we move all
>> IPv6
>> addresses that are in front of the first IPv4 address to the end. That
>> way, we will use the first IPv4 address. We will race these two
>> connect()s and pass the first one to complete to
>> ConnectJob::set_socket().
> Doesn't this sound like an implementation of Happy Eyeballs (http://tools.ietf.org/html/draft-ietf-v6ops-happy-eyeballs-02) ?


not fully according to the spec as this post says:
but close. I guess the basic idea is similar ...

Kind regards,
 Stefan Neufeind

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