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c-ares version 1.24.0
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This is a feature and bugfix release.
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Features:
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o Add support for IPv6 link-local DNS servers. Nameserver formats can now
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accept the %iface suffix, and a new ares_get_servers_csv() function was
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added to return servers that can contain the link-local interface name. [3]
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Changes:
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o Unbundle GoogleTest for test cases. Package maintainers will now need to
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require GoogleTest (GMock) as a build dependency if building tests. New
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GoogleTest versions require C++14 or later. [6]
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o Replace nameserver parsing code to use new memory-safe functions. [1]
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o Replace the sortlist parser with new memory-safe functions. [5]
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o Various warning fixes and dead code removal.
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Bug Fixes:
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o Old Linux versions require POSIX_C_SOURCE or _GNU_SOURCE to compile with
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thread safety support. [2]
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o A non-responsive DNS server that caused timeouts wouldn't increment the
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failure count, this would lead to other servers not being tried.
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Regression introduced in 1.22.0. [4]
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o Some projects that depend on c-ares expect invalid parameter option values
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passed into ares_init_options() to simply be ignored. This behavior has
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been restored. [7]
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o On linux getrandom() can fail if the kernel doesn't support the syscall,
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fall back to another random source. [8]
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o ares_cancel() when performing ares_gethostbyname() or ares_getaddrinfo()
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with AF_UNSPEC, if called after one address class was returned but before
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the other address class, it would return ARES_SUCCESS rather than
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ARES_ECANCELLED. [9]
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Thanks go to these friendly people for their efforts and contributions:
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Brad House (@bradh352)
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Daniel Stenberg (@bagder)
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(2 contributors)
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References to bug reports and discussions on issues:
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[1] = https://github.com/c-ares/c-ares/pull/643
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[2] = https://github.com/c-ares/c-ares/issues/644
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[3] = https://github.com/c-ares/c-ares/pull/646
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[4] = https://github.com/c-ares/c-ares/pull/650
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[5] = https://github.com/c-ares/c-ares/pull/653
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[6] = https://github.com/c-ares/c-ares/pull/655
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[7] = https://github.com/c-ares/c-ares/commit/c982bf4
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[8] = https://github.com/c-ares/c-ares/pull/661
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[9] = https://github.com/c-ares/c-ares/pull/663
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