Re: [lwip-devel] ipv6 processing - Edge router implementation

[Enrico Lehmann]

> > > I would like to at some point code a 6LowPAN netif for LwIP that would
> > > handle fragmentation and reassembly, but I haven't found the time yet.
> > I'm using such a 6LoWPAN solution supporting fragmentation/reassembly and
> > header compression. This function is installed as ip6_output() for the
> > 6LoWPAN netif. So any received wireless packet is going through the
> > reassembly/header-compression part and than goes to ip6_input(). Any
> > packet on Border Router which is destined to a wireless node is processed
> > by ip6_input() and further processed by fragmentation/header-compression
> > layer.
> That's the way to do it. One obstacle I've faced with this approach is
> that I would need to implement RPL over LwIP. This is too much work for me
> at the moment.
Since RPL is not the only way to doing 6LoWPAN routing, I'am using a 
'mesh-under' solution. But certainly RPL is the preferred way that 
should be used for 6LoWPAN. Which is obviously the case, since RPL is 
standardized in march as RFC6550.
Maybe later a jump to RPL is necessary and thats the point where 
implement RPL over lwIP.
> > > Other than that, you can always use LWIP_IP6_FORWARDING and that has
> > > been
> > > working well for me.
> > In fact thats true - I already using that. But I was thinking of a 'real'
> > Router which is capable to transmit Router Advertisements and process
> > Router Solicitations. So I have to think about to implement such a
> > solution - maybe we can support and share some knowledge to each other?!
> Router advertisements and solicitations are a TODO in the current code, so
> any contribution here is very welcome!
In accordance to my free time, I will start a implementation. If the 
code reaches a level to share, I'll come back up here.
> Cheers
> Ivan