[En-Nut-Discussion] Re: Trying to work with PPP

[Harald Kipp]

Eduardo,

It's the other way round. Ethernut PPP can do PAP only,
not CHAP. If your provider doesn't support PAP, you're
lost unless you enhance the Nut/Net stack. But no idea
wether the ATmega is able to calculate CHAP encryption
in time.

Harald

At 18:10 13.12.2004 +0100, you wrote:
>Hi again,
>
>I don't resign in my particular game with the PPP (sorry), but I am not an
>expert in it (in fact I'm new in that field). After testing the fantastic
>Serial Analyzer of Mike Cornelius (THANKS!!!), I can put some questions on
>the board about the behaviour of Ethernut (2.1B):
>
>1- I have noted that the Packet identifier starts at 0x01 (usually it starts
>at 0x00) with a CHAP MD5 request, it sends the 0x02 identifier with the same
>request, and then it sends a simple packet with the Async Control char map
>and the magic number WITH IDENTIFIER 0x01 (should it be 0x03????)
>
>2- The ISP sends Nak to all the requests and proposes PAP as authentication
>protocol. Ethernut insists in CHAP, and sends a Termination request again
>with identifier 0x01!!
>
>3- I have configured my PC in order to emulate the connection under CHAP and
>the ISP works ok. In fact the PC sends the same packets that Ethernut sent,
>but without repeating the identifier numbers.
>
>4- Is it possible to change the parameters of PPP in Ethernut? (change CHAP
>to PAP, ...)
>
>Any suggestions? Any known bug?
>
>Thx,
>
>Eduardo