Re: DragonFly-2.1.1.346.g4d1d7 master usr.sbin/dntpd client.h defs.h dntpd.8 main.c socket.c

["Sepherosa Ziehau" <sepherosa@xxxxxxxxx>]

On Fri, Jan 9, 2009 at 8:19 PM, Simon 'corecode' Schubert
<corecode@fs.ei.tum.de> wrote:
> Matthias Schmidt wrote:
>>
>> commit 4d1d74ba3c1fe85df343e4059c80bc704eec0312
>> Author: Matthias Schmidt <matthias@dragonflybsd.org>
>> Date:   Fri Jan 9 12:35:25 2009 +0100
>>
>>    Add IPv6 support to dntpd
>>        This commit allows dntpd to work with either IPv4 or IPv6 NTP
>> servers.  I added
>>    two new command line switches (-4/-6) to force dntpd to use only v4/v6
>> addresses.
>>    Thanks to sephe@ for some good hints.
>
> Are you sure this works if the ipv6 server is unreachable?  I don't think
> that a connect(2) on a udp socket will find that out.  You'd actually have

udp_socket() only sets up a UDP socket; by calling connect(2) we could
receive ICMP error and use write(2) like functions.  As far as I
understand the code, it never intends to verify the reachability of
the server.

Best Regards,
sephe

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