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Re: IPv6 issues with curl 7.87.0 + c-ares 1.16.1

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From: Peter Krefting via curl-users <curl-users_at_lists.haxx.se>
Date: Thu, 19 Jan 2023 09:42:58 +0100 (CET)

Hi!

> I am upgrading our version of curl and c-ares on an embedded device,
> and after upgrading, I find that on a system where IPv6 setup is
> incomplete (only internal network configured [1]), I am unable to
> perform any https requests; IPv4 fall-back does not happen.

Since the issue disappeared while changing c-ares versions, I bisected
c-ares to see if I could find a regression there; bisection points me
to the commit that changes the version number from 1.15 to 1.16, which
lead me to look back at the curl code, where this stood out:

   lib/asyn-ares.c:
   #if ARES_VERSION >= 0x011000
   /* 1.16.0 or later has ares_getaddrinfo */
   #define HAVE_CARES_GETADDRINFO 1
   #endif

Could this be the cause for the issue I am seeing?

-- 
\\// Peter - http://www.softwolves.pp.se/
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Received on 2023-01-19

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In reply to: Peter Krefting via curl-users: "IPv6 issues with curl 7.87.0 + c-ares 1.16.1"

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