Re: [lwip-users] PPP example

[Michael Broughton]

I don't have an example that I can show you but it's not really that 
complicated. I'm going to assume that you have lwip all set up and ready to 
go; in other words, you have all the sysarch, lwipopts, and sio stuff in 
working order. If that is the case, there a four routines that you should 
take a look at in ppp.c:

pppInit() - Call this once when you system starts. I call this from my 
sys_init() routine.
pppSetAuth() - Use this to set a user name and password for PAP or CHAP, if 
you have either of them enabled (look in your lwip opts files).
pppOpen() - Creates a new thread and tells it to start PPP. This new thread 
will let you know what's going on with the PPP connection via the callback 
that you must specify for the first argument.
pppClose() - Brings down the PPP link and ends the PPP thread.

You should be able to ignore just about everything else, unless you need to 
do some debugging. Anyway, this is basically what you need to do:

1. Initialize your system and lwip (including pppInit()).
2. Open your comm port.
3. Dial your modem and wait for it to connect.
4. call pppSetAuth() and pppOpen().
5. wait for PPP to tell you it is open (or if it failed for whatever reason).
6. now you should be on-line. do your thing.
7. call pppClose and close your comm port.

That should get you started. Just make sure you read and understand exactly 
what those four routines (the ones i outlined above) are doing.


Mike


At 07:09 PM 03/07/2004, you wrote:
> Hi
>
> I am trying to get lwIP with PPP up and running on my ARM devboard. Does 
> anyone have some working PPP examples?
>
> Thanks
> Felix
>
>
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