Re: gpsd Reliable and resilient tcp feed

[Nick Taylor]

Hi all

We are really struggling with this...

We need to use tcp feed into gpsd - our customer is providing the feed 
so udp not really an option.

Requirement is for reliable and resilient tcp feed to gpsd. Currently it 
doesn't do very well if feed gets interrupted - either by restart of the 
feed or if we block the connection for a while with iptables to simulate 
interrupted feed.

I realise that gpsd is a complex beast and our guy hasn't yet come up 
with working solution - we keep getting bad side effects like gpsd 
failing to respond to client connects and broken shm ntp feed

Any gpsd gurus here interested in some contract work - or can anyone 
point us to someone who could help??

Many thanks

Nick


On 24/09/2021 22:16, Gary E. Miller wrote:
> Yo Nick!
>
> On Fri, 24 Sep 2021 15:57:30 +0100
> Nick Taylor <nicktaylor@dataskill.uk> wrote:
>
> > We would appreciate some help... It seems that the option for using
> > NMEA tcp feed to gpsd isn't very tolerant to network feed
> > disconnects...
> Why not UDP?
>
> > Attached please find our patch as it is so far, together with debug
> > log showing where the tcp connect hangs...
> You already sent that patch.  Same issues I found then are still there.
>
>
> RGDS
> GARY
> ---------------------------------------------------------------------------
> Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
>         gem@rellim.com  Tel:+1 541 382 8588
>
>             Veritas liberabit vos. -- Quid est veritas?
>      "If you can't measure it, you can't improve it." - Lord Kelvin