gh-154291: Fix socket.has_dualstack_ipv6() on DragonFly BSD#154292
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serhiy-storchaka merged 2 commits intoJul 20, 2026
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On DragonFly BSD setsockopt(IPPROTO_IPV6, IPV6_V6ONLY, 0) succeeds without actually clearing the flag, so has_dualstack_ipv6() wrongly returned True. Verify with getsockopt() that IPV6_V6ONLY was cleared. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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needs backport to 3.13
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…ntry Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Thanks @serhiy-storchaka for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14, 3.15. |
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GH-154299 is a backport of this pull request to the 3.15 branch. |
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GH-154300 is a backport of this pull request to the 3.14 branch. |
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GH-154301 is a backport of this pull request to the 3.13 branch. |
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…H-154292) (GH-154301) On DragonFly BSD setsockopt(IPPROTO_IPV6, IPV6_V6ONLY, 0) succeeds without actually clearing the flag, so has_dualstack_ipv6() wrongly returned True. Verify with getsockopt() that IPV6_V6ONLY was cleared. (cherry picked from commit c7bbf04) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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…H-154292) (GH-154300) On DragonFly BSD setsockopt(IPPROTO_IPV6, IPV6_V6ONLY, 0) succeeds without actually clearing the flag, so has_dualstack_ipv6() wrongly returned True. Verify with getsockopt() that IPV6_V6ONLY was cleared. (cherry picked from commit c7bbf04) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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…H-154292) (GH-154299) On DragonFly BSD setsockopt(IPPROTO_IPV6, IPV6_V6ONLY, 0) succeeds without actually clearing the flag, so has_dualstack_ipv6() wrongly returned True. Verify with getsockopt() that IPV6_V6ONLY was cleared. (cherry picked from commit c7bbf04) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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On DragonFly BSD
setsockopt(IPPROTO_IPV6, IPV6_V6ONLY, 0)succeeds without actually clearing the flag, sohas_dualstack_ipv6()returned True even though dualstack sockets do not work. Verify withgetsockoptthatIPV6_V6ONLYwas actually cleared.