Re: [Linuxptp-users] PTP4L daemon seems to have a problem with to a link local address for IPv6

[Richard C. <ric...@gm...>]

On Sun, Nov 25, 2012 at 06:38:01AM +0100, Mario Molitor wrote:
> 
> >It looks like we will have to set sin6_scope_id for the Pdelay
> >messages in P2P mode in any case. I will do some testing on this to
> >find out.
> 
> Ok. Thanks

I tried IPv6 with the OTMC 100, and it sends using site-local (0x5)
scope. So I hacked that in like

   #define PTP_PRIMARY_MCAST_IP6ADDR "FF05:0:0:0:0:0:0:181"

and it worked fine for me, both E2E and P2P mode.

The Pdelay messages still work even though addr.sin6_scope_id was set
to zero, while the actual interface index was three. Strange.

I will make a few changes to fix this up:

1. clear the ipv6 address structure.
2. remember the interface index.
3. set addr.sin6_scope_id for Pdelay messages.
4. add an option to specify the ipv6 scope, and
   set addr.sin6_scope_id when appropriate

Thanks,
Richard