[Bug 291145] UDP connected sockets cannot be disconnected

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 11 Dec 2025 01:37:59 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291145

--- Comment #1 from John Studnicka <contact@zentec.dev> ---
I tried this with the Rust socket2 crate for the following scenarios and
neither of the sockets were able to reach a "disconnected" or unfiltered state
after the initial connect to a client IP:

socket2::Socket::new(Domain::IPV4, Type::DGRAM, Some(Protocol::UDP))

connect to AF_UNSPEC -> EAFNOSUPPORT
connect to NULL -> EINVAL

socket2::Socket::new(Domain::IPV6, Type::RAW, Some(Protocol::ICMPV6))

connect to AF_UNSPEC -> EINVAL
connect to NULL -> EINVAL

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