RE: [chrony-dev] Chrony 3.0-pre1 fails to send or receive data from socket on FreeBSD

[Adri Koppes <adrik@xxxxxxxxxxxxxxx>]

> -----Original Message-----
> From: Miroslav Lichvar [mailto:mlichvar@xxxxxxxxxx]
> Sent: woensdag 14 december 2016 17:07
> To: chrony-dev@xxxxxxxxxxxxxxxxxxxx
> Subject: Re: [chrony-dev] Chrony 3.0-pre1 fails to send or receive data from
> socket on FreeBSD
> 
> On Wed, Dec 14, 2016 at 04:57:49PM +0100, Miroslav Lichvar wrote:
> > On Wed, Dec 14, 2016 at 03:34:30PM +0000, Adri Koppes wrote:
> > > Miroslav,
> > >
> > > I have chronyd 2.4.1 running on FreeBSD 11.0 release and it's working
> fine.
> > > All refclocks are internet servers and data is received normally.
> > > I have just compiled chrony 3.0-pre1 and it fails to receive any timestamp
> data from the internet refclocks.
> > > I tried again with the latest master from git and it fails in the
> > > same way, This is some debug output from the git master version and it
> seems there is an almost immediate timeout on both send and receiving data
> from any socket.
> > >
> > > 2016-12-14T15:25:22Z ntp_core.c:1056:(transmit_timeout) Transmit
> > > timeout for [194.171.167.130:123] 2016-12-14T15:25:22Z
> > > ntp_io.c:830:(NIO_SendPacket) Sent 48 bytes to 194.171.167.130:123
> > > from [UNSPEC] fd 7 2016-12-14T15:25:22Z
> > > ntp_io.c:668:(process_message) Received 0 bytes from
> > > 194.171.167.130:123 to [UNSPEC] fd=7 if=-1 tss=1 delay=0.000104191
> > > 2016-12-14T15:25:22Z ntp_core.c:1056:(transmit_timeout) Transmit
> > > timeout for [80.94.65.10:123] 2016-12-14T15:25:22Z
> > > ntp_io.c:830:(NIO_SendPacket) Sent 48 bytes to 80.94.65.10:123 from
> > > [UNSPEC] fd 8 2016-12-14T15:25:22Z ntp_io.c:668:(process_message)
> > > Received 0 bytes from 80.94.65.10:123 to [UNSPEC] fd=8 if=-1 tss=1
> > > delay=0.000099536
> > >
> > > If there is anything I can do to test or provide more information, please
> let me know.
> >
> > Hm, I have it working on FreeBSD 10.1. I guess it might be related to
> > the new support for recvmmsg(). Do you see 'HAVE_RECVMMSG 1' in
> > config.h after running ./configure? If yes, can you remove that line
> > from config.h, recompile chronyd, and see if it works?
> 
> I found the following commit, which would explain the problem:
> 
> https://github.com/freebsd/freebsd/blob/3fa64907439c00965fb0cbb222a6bf
> 073c452630/lib/libc/gen/recvmmsg.c
> 
> Is it safe to assume this will be included in FreeBSD 11.1?

This commit is not part of 11.0 release.
The commit says 'MFC after 3 days', and has been done in 11-stable.
11-stable will eventually become 11.1, so I'm sure the fix will be included in 11.1, but unlikely to appear in security updates to 11.0.

Adri.


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