[lwip-users] Re: [lwip] Compression of fields....

[Omer Mohsin]

hi
thanks for your reply. I am basically trying to dial ISP through C
program. I am including these options in my connection extablishment
phase. Now, I want to know how I can map 2 byte data into 1 byte? I mean
the mapping to be used. RFC 1661 does not explain the mapping. Like our
next protocol is PAP whose code is c023 and requires 2 bytes, so how I can
write c023 in 1 byte.

Thanks,
Omer Mohsin.



On Tue, 26 Mar 2002, Muhammad Ashraf wrote:

> Hi
> 
> In order to Compress Protocol field and Address and Control field to one 
> byte, You must have to negotiate these options during PPP Connection 
> establishment phase.
> These Options are negotiated during LCP phase of Connection establishment.You 
> have to 
> include these two options in your LCP configure request packet.
> 
>                                     i) Address and Control field Compression
>                                     ii) Protocol field Compression 
> 
> You can found the packet format and other details related to PPP in the Rfc 
> 1661.
> 
> hope this will help you.
> 
> 
> ashraf
>   ----- Original Message ----- 
>   From: Omer Mohsin 
>   To: address@hidden 
>   Sent: Monday, March 25, 2002 6:16 PM
>   Subject: [lwip] Compression of fields....
> 
> 
>   Hi,
> 
>   I appreciate your support. I am not building PPP for lwip, instead I am 
> doing my Final Year Project of sending mail through embedded system. 
> Currently I am trying to send e-mial using C++ program. I have evetually 
> solved CRC problem, but now I am facing problem regarding Address and Control 
> field compression and Protocol field compression. I'll appreciate if any of 
> you may inform me about that. I want to know how we can convert 2 byte data 
> into 1 byte (the mapping involved). Which RFC or site can help me?
> 
>   Thanks,
>   Omer Mohsin Mubarak.
>   Faculty of Electronic Engineering,
>   GIK Institute, Topi. Pakistan
> 

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