Re: [lwip-devel] PPP problems: IPCP (NOT) obsolete option

[Alain M.]

David Empson escreveu:
> > > What does the remainder of the packet mean?
> > > 81 06      !           00 00 00 00 83 06 00 00 00 00     You, Alain 
> > > evidentially translated these bytes...!
The IPCP request contains three parts: IP, DNS1, DNS1.  It is filld this 
seros where the response will get filled This is all in one package :)

There is a comment somewhere: IPCP will be ignored it LCP is not 
finished, obviously incliding PAP/CHAP

Alain


> Those bytes are clearly within the IPCP configure request (as 
> indicated by the length of 0x0016 = 22).
>
> I don't know what they mean and haven't found an RFC documenting them, 
> but they are in the right format to be two more IP configuration 
> options of types 0x81 and 0x83, with length = 6 and four zero bytes 
> for the data.
>
> They might be something proprietary which someone put into the the PPP 
> IPCP implementation by mistake (perhaps copied blindly from another 
> implementation?). Possibly coincidentally, the option types have the 
> same values as "IP Addresses" and "IP Address" from the IPCP standard, 
> with the high order bit set.