Re: [lwip-users] Gateway problem with LwIP

[address@hidden]

sb80 wrote:
> have you an example code for me to realize this routing function?

No, I'm sorry there is no extended routing code available, and I can't 
write it for you.

> should I define in the the opt.h something like this

Yes, the definition looks good.

> and in ip.c

No, place the function somewhere else. You shouldn't have to modify the 
original lwIP source files.

> struct netif * routingToNetif(ip_addr_t *dest)
> {
> ...
> ??what should the code make here? select the interface which have the rigth
> gateway?

That totally depends on how you want your routing. I can't tell you 
that: for me, the standard lwIP routing is enough.

> Am I right? that if i include this function, the ARP, ping and others take
> the right interface to find the gateway (MAC) and other destinitaions?

No, routing is done at IP level, ARP is on a lower level. But I think I 
see what you mean... If your routing function is OK, you will see the 
ARP requests on both netifs when you ping the correct addres.

> Is it enough that only this routing function is included in the old version
> from me with out to upgrade the whole lwip code?

I'm sorry I can't support such selective upgrade paths. It might work 
though, just try it and see if it works.

> Can you advise a documentation where i can learn more about the functions
> from the lwip stack? Because sometimes I don't understand the application
> flow from the stack (because it's a new world for me :-) )

See the text files in /doc, and the wiki (http://lwip.wikia.com/).

Simon