[lwip-users] Re: [lwip] tun/tap

[Mumtaz Ahmad]

Thx for prompt reply as usual :)

is it same concept as packet sniffing? do the packets are also copied to the
kernal stack?

My questions sounds stupid because i have never been on unix or linux :)

Regards
----- Original Message -----
From: Adam Dunkels <address@hidden>
To: <address@hidden>
Sent: Friday, March 22, 2002 2:36 PM
Subject: Re: [lwip] tun/tap


> On Friday 22 March 2002 10.24, you wrote:
> > Can any body give some brief introduction about  tun/tap driver in
layman
> > words?
>
> The tun and tap drivers are abstract network interfaces. They appear to be
> network hardware such as an Ethernet card, but in reality they just exist
in
> the kernel. Packets sent to the tun or tap interfaces are not sent out
over a
> physical network. Instead, they packets end up in a special file,
/dev/tun0
> or /dev/tap0. Data that is written to the same files will appear as
network
> packets from actual network hardware.
>
> Also, check this message out:
> http://www.sics.se/~adam/lwip/maillist/msg00091.html
>
> /adam
> --
> Adam Dunkels <address@hidden>
> http://www.sics.se/~adam
> [This message was sent through the lwip discussion list.]

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