[Winpcap-users] Using Ethernet Connection Instead of Dial-Up

Gianluca Varenni gianluca.varenni at cacetech.com
Tue May 18 08:50:19 PDT 2010



--------------------------------------------------
From: <ceo at triplebit.com>
Sent: Monday, May 17, 2010 9:44 PM
To: <winpcap-users at winpcap.org>
Subject: Re: [Winpcap-users] Using Ethernet Connection Instead of Dial-Up

> Thanks GV,
>
> Since  I develop software for other environments also I'd like to know
> whether your answer applies also to other kinds such as cables, isdn and
> other environments. Is it correct to say that its always (or almost 
> always)
> possible to retrieve the Ethernet packets?

I'm not sure I understand your question. I never encountered an ethernet 
card from which it was not possible to capture (provided that you disable 
some hardware optimizations like TOE). But ISDN is not on ethernet, for 
example.

GV


>
> Thanks again
>
> I. Lesher
>
>
>
>> Do you mean something like a DSL modem connected to your computer via
>> ethernet?
>> If so, you can definitely capture the packets there, but the packets are
>> not
>> encapsulated in the "classic" ethernet->IP->tcp/udp fashion. It's usually
>> something like ethernet->PPPoE->PPP->IP (or something similar to this 
>> that
>> I
>> cannot remember now) so you might need to modify your dissection code
>> accordingly.
>>
>> Have a nice day
>> GV
>>
>>> Thanks for any help
>>> I. Lesher
>>>
>>
>>
>>
>>>
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>>
>>
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