[lwip-users] Re: [lwip] CRC in PPP

[Adam Dunkels]

On Friday 22 March 2002 12.29, you wrote:
> Just wanted to know which CRC is used in PPP....... We have 16 bit CRC in
> PPP field, so it should be 16 bit CRC...... Is it so? and please do let me
> know how to compute that...... because the long division method which I
> know is not giving me right results.

I think it is standard CRC-16 which I think is calculated as x^16+x^15+x^2+1, 
but I'm not sure. There are numerous table-based CRC implementations out 
there, and they should be easy to find with google.

Are you writing a PPP layer for lwIP?

/adam
-- 
Adam Dunkels <address@hidden>
http://www.sics.se/~adam
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