[ECOS] Re: Multiple PPP interfaces in single unit

[Kelvin Lawson <klawson at ad-holdings dot co dot uk>]

> Is it possible to use the PPP stack to chain multiple devices via
> the serial ports?

Some modifications are necessary to handle multiple PPP interfaces on 
one unit. There are a bunch of globals in the PPP files used to store 
configuration details. These are currently used for the first PPP 
interface ppp0 only.

In order to support multiple simultaneous interfaces (ppp1, ppp2...) 
those globals need to be replaced by some other mechanism that scales to 
multiple interfaces - a simple solution might be to replace 
per-interface globals by arrays of up to the maximum number of PPP 
interfaces you want to support. A more dynamic system would be nicer 
however.

I haven't got round to trying this out yet, but it's on my list.. 
unfortunately it's not at the top.

As for the chaining scenario - if you want to talk from one end of the 
chain to the other, I guess you'll need to enable IP forwarding on the 
mid-chain units.

Kelvin.


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