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PR: MTU discovery fails with IPv6 sockets bound to IPv4 mapped address

To: tech-net <tech-net%netbsd.org@localhost>
Subject: PR: MTU discovery fails with IPv6 sockets bound to IPv4 mapped address
From: Frank Kardel <kardel%kardel.name@localhost>
Date: Sat, 7 Aug 2021 07:46:49 +0200

Is there anyone willing to look at the fix before I commit?

The MTU bug prohibits data transfer as the write(v) systemcall
fails with EMSGSIZE(40).

https://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=56348

Frank

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