Ethereal-users: [Ethereal-users] Re: Decoding PPP over IP

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From: "Darren Adkinson" <Darren.Adkinson@xxxxxxxxxxxxx>
Date: Mon, 15 Aug 2005 11:10:04 -0700
Thanks Ronnie. It is indeed ppp straight on top of udp, no standard that
I'm aware of, although I know of at least two wireless applications
using this procedure. The protocol stack:

Data ---------------- Data
IP1  ---------------- IP1
PPP  ---------------- PPP
UDP  ---------------- UDP
IP2  -----  IP  ----- IP2
L2   ----  L2|L2 ---- L2
PHY  ---- PHY|PHY --- PHY

Client     Box X      Box Y

I may be able to send a capture but I'd need to see if, in principle,
the decode would be possible. I guess it would be possible to write a
dissector, but most of the code would already be there for ppp over
L1...


On 8/12/05, ronnie sahlberg <ronniesahlberg@xxxxx> wrote: 
>So it is PPP straight ontop of UDP ?
>
>Do you have a pointer to which standard this is defined in?
>or
>Do you have example captures of this traffic you can send to the list
>then we can have a go at adding support for it?



On 8/12/05, Darren Adkinson <Darren.Adkinson@xxxxxx> wrote:
> Hi there,
> 
>  
> 
> Does anyone know of a way to decode ppp over ip? The stack I'm working
> on transports ip over ppp over udp/ip, and the ppp messages are
> currently decoded as LLC. The "Decode as.." transport layer options in
> Ethereal don't include ppp, naturally enough.
> 
>  
> 
> Thanks in advance
> 
> Darren