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Re: IPv6 resolution problems for IPv4 resolve mode
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From: Daniel Stenberg via curl-library <curl-library_at_lists.haxx.se>
Date: Fri, 20 May 2022 16:13:56 +0200 (CEST)
On Mon, 9 May 2022, Dmitry Karpov via curl-library wrote:
> If this approach is agreed upon, I have implementation for these changes and
> can create a PR.
The most recent change in this area that I can recall introduced the
unconditional request for both families even if you ask for IPv4 or IPv6
specifically for a specific reason: The DNS cache.
That user had an application that wanted to first create an IPv4 (-only)
connection and then an IPv6 (-only) one (separately from the previous
connection). That requires that the DNS cache keeps both families even if the
transfer itself is done using only one of them.
I presume this is what causing you problems?
Date: Fri, 20 May 2022 16:13:56 +0200 (CEST)
On Mon, 9 May 2022, Dmitry Karpov via curl-library wrote:
> If this approach is agreed upon, I have implementation for these changes and
> can create a PR.
The most recent change in this area that I can recall introduced the
unconditional request for both families even if you ask for IPv4 or IPv6
specifically for a specific reason: The DNS cache.
That user had an application that wanted to first create an IPv4 (-only)
connection and then an IPv6 (-only) one (separately from the previous
connection). That requires that the DNS cache keeps both families even if the
transfer itself is done using only one of them.
I presume this is what causing you problems?
-- / daniel.haxx.se | Commercial curl support up to 24x7 is available! | Private help, bug fixes, support, ports, new features | https://curl.se/support.html -- Unsubscribe: https://lists.haxx.se/listinfo/curl-library Etiquette: https://curl.haxx.se/mail/etiquette.htmlReceived on 2022-05-20