[LEAPSECS] stale leap second information

Poul-Henning Kamp phk at phk.freebsd.dk
Sun Jan 18 13:19:51 EST 2015

In message <4CCFC94D-6324-4A64-87CB-8EA5E9BC08F0 at bsdimp.com>, Warner Losh write

>>>> Unless there is an overriding value in efficient encoding,
>>> There is.  getaddrinfo(3) is almost always available and works
>>> about as well as any protocol on the internet can work.
>> Doesn't getaddrinfo support IPv6, too?  Parsing the longer string 
>won't be dramatically slower.

Man DNS resolvers are setup to not forward IPv6 responses (because
they know there is no IPv6 connectivity behind them.)

In reality, I would send both an IPv6 and IPv4 DNS record as
response, hoping that at least one of them makes it through.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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