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List:       linux-ppp
Subject:    Re: Flow when PPPD call VJ compression
From:       Haipeng Jin <haipengj () qualcomm ! com>
Date:       2003-11-06 16:51:06
[Download RAW message or body]

ppp encapsulation and compression part is implemented in the driver code in 
the kernel. Check out ppp.c or ppp_generic.c under linux/drivers/net/ in 
the linux source tree. In the ppp_send_frame and ppp_receive_frame 
functions (I could be wrong on the name), the VJ compress functions are 
called if it is enabled and if the received/transmitted packets are IP 
packets. These are the kernel module part.

I don't think pppd program calls VJ directly. pppd basically implements the 
LCP and IPCP related part. VJ options is negotiated when you start pppd, 
you can check out the related code in ipcp.c and sys-linux.c.

Hope this helps.

Haipeng


At 05:14 PM 11/6/2003 +0700, Sripat.Sringkarn@orange.co.th wrote:
>Dear All,
>
>Does anyone know the flow when PPPD program call VJ header compression
>mechanism?
>
>Best Regards.
>------------------------------------------------------------------------------------
>
>Sripat Sringkarn
>GPRS Design Engineer
>
>TA Orange Co., Ltd.
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