[ntp:questions] ntp client ipv6 support

Rick Jones rick.jones2 at hp.com
Fri Jun 17 23:44:16 UTC 2011

John Hasler <jhasler at newsguy.com> wrote:
> Rick Jones wrote:
> > Netperf has been passing IPs to getaddrinfo() without setting any
> > special flags.

> Chuck Swiger writes:
> > Maybe there are broken implementations of getaddrinfo() floating
> > around?

> On Linux you must set a flag to tell it not to consider the possibility
> that what you are passing it is not a numeric address:

>        node specifies either a numerical network address (for IPv4,
>        numbers-and-dots notation as supported by inet_aton(3); for IPv6,
>        hexadecimal string format as supported by inet_pton(3)), or a
>        network hostname, whose network addresses are looked up and
>        resolved.  If hints.ai_flags contains the AI_NUMERICHOST flag
>        then node must be a numerical network address.  The
>        AI_NUMERICHOST flag suppresses any potentially lengthy network
>        host address lookups.

>        POSIX.1-2001.  The getaddrinfo() function is documented in RFC 2553.

I may be parsing your sentence incorrectly, but my reading of the
manpage is that one may set AI_NUMERICHOST, in which case node must be
an IP address, but that is not the same thing as saying that if node
is an IP address that AI_NUMERICHOST must be set.

rick jones
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
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