[Bug 206544] sendmsg(2) (sendto(2) too?) can fail with EINVAL; isn't documented in manpage
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Date: Mon, 02 Oct 2023 23:23:43 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206544
Peter Jeremy <peterj@FreeBSD.org> changed:
What |Removed |Added
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CC| |peterj@FreeBSD.org
--- Comment #7 from Peter Jeremy <peterj@FreeBSD.org> ---
I've bumped into the lack of documentation as well, though the triggers were
hidden far more deeply in the kernel:
1) An incorrect cmsg_len will typically trigger EINVAL.
2) Using IPv6-level messages (i.e. cmsg_level==IPPROTO_IPV6) with at
IPv4-mapped IPv6 connection will trigger EINVAL in at least some cases.
This appears to be a duplicate of bug 99356. I won't close it as a duplicate
because there's different analysis in both bugs.
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