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To: FreeBSD Hackers <freebsd-hackers@freebsd.org>
From: Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM>
Subject: Re: `ifconfig` patch to resolve IPv6 scope names
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Date: Mon, 21 Aug 2017 05:42:51 +0100
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raichoo:

> + switch (__IPV6_ADDR_MC_SCOPE(addr)) {
>
> + case __IPV6_ADDR_SCOPE_NODELOCAL:
>
I recommend instead using IN6_IS_ADDR_MC_NODELOCAL() and its ilk from 
netinet/in.h .  They are defined by the SUS.