Re: [lwip-users] 2 Interfaces

[Fabian Cenedese]

At 15:43 05.03.2013 +0100, you wrote:
>On 2013-03-05 15:07, Fabian Cenedese wrote:
>>That's what I already tried. However if I netif_set_up the second
>>interface then the communication over the first interface doesn't
>>work anymore. I found out that the interfaces must have IP
>>addresses differing inside the network mask. That may be
>>obvious to you but I thought that's what the default is for. If
>>no interfaces match or more than one then use the default
>>instead of just the first found. Because I'd like to have both
>>interfaces in the same subnet even with differing IP addresses.
>>If there's no rule/standard on what to do in this case then I'd
>>change core/ipv4/ip.c like this (could use some more error
>>handling):
>
>That is not the only thing to change, you might want to take a look at the 
>changes we made for multiple interfaces in the same network at 
>https://github.com/EngineeringSpirit/FreeLwIP-Nios-II/tree/master/lwip/FreeRTOS
>
>I have changed the sources in core/ip4.c/h and core/udp.c as far as I can 
>remember. And to catch UDP broadcasts via both interfaces, we create two 
>sockets both listening specifically on the IP address of the interface. (So 
>not INADDR_ANY but the IP from the interface)
>
>Unfortunately you would probably need to make your own diff, I moved to files 
>around a bit so I could include them in the IDE where it's build for...

Thanks for the link, I'll have a look at it. There are several changes,
I don't know if they're all related to 2 interfaces. On the other hand
I'd like to stay close to the original sources so an update is easier.
I'll play a bit with it.

Thanks

bye  Fabi