Re: [lwip-users] lwIP - NAT implementation

[address@hidden]

Christian Walter wrote:
> > >   - We would need some defragmentation code to handle fragmented UDP and
> > > TCP pakets correctly. This is the most difficult one but is not need by
> > > my customer right now. Still I would like to have the opportunity to add
> > > this later. Are there some design issues I should take care of right now?
> > >       
> > Couldn't we just forward the fragments?
> >     
>
> The problem with this is that I can not track the state anymore since  
> I need the TCP and UDP headers for this. When I receive back an packet  
> I am currently checking if the tcp port belongs to a connection with  
> NAT. I only have the TCP header in the first paket of the fragment.
>   
Couldn't we just insert the forwarding after the call to ip_frag_input() 
(or whatever the function is called, i.e. after defragmenting a packet)?

Simon