Tinc hangs if started with network disconnected

Guus Sliepen guus at tinc-vpn.org
Fri Feb 17 16:06:36 CET 2017

On Fri, Feb 17, 2017 at 01:20:59PM +0100, Sandro Stiller wrote:

> > Does it not log anything anymore after those messages? Or does it
> > continue giving the "Error looking up..." message periodically?
> It stops working completely.
> > In the first case, try sending tinc the ALRM and/or HUP signal (tincd -n
> > <netname> -kALRM). This should cause tinc to retry outgoing connections
> > immediately.
> After that, it continues trying.
> I think, I found the cause of the problem:
> Is tinc using a monotonic / steady clock for timeouts or is it using the system time?

I think you are right! It uses time() and gettimeofday() to calculate
how long to wait for the timeouts. I'll have to look at a portable way
to get a monotonic clock.

> > In any case, which Linux distribution are you using?
> It's an OpenEmbedded-based distribution  for embedded devices

Ok, that probably explains why you always have a large jump in time at
boot. Just curious: what hardware are you running tinc on?

The best solution for now is to send tinc an ALRM signal after the time
is set.

Met vriendelijke groet / with kind regards,
     Guus Sliepen <guus at tinc-vpn.org>
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