How to receive IP and RAW frames on the same ethernet device ?

How to receive IP and RAW frames on the same ethernet device ?

[gguevel]

Hi,

I work on a custom 860 board with Linux 2.2.14.

I want to receive and send IP and RAW frames simultaneously on the same
ethernet device.

I don't know if I can use ethertap driver or something else.

I don't understand why I must "ifconfig" the ethertap with an ip address if
I just want raw
frames like LLC frames.

Has anybody a good idea ?

Thanks

Gérard Guével


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Re: How to receive IP and RAW frames on the same ethernet device ?

[Wolfgang Denk]

Dear Gérard,

in message <000001c25825$a572e5c0$3101a8c0@DOMAIN> you wrote:
>
> I work on a custom 860 board with Linux 2.2.14.

What a day is this? Seems everybody using this old  stuff  is  active
today ;-)

> I want to receive and send IP and RAW frames simultaneously on the same
> ethernet device.

Use a raw socket; something like

	socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));

should be all that's needed; get yourself a copy  of  libnet,  and/or
libpcap.


However, I have no idea if this ever worked in 2.2.14; you might want
to use a more recent kernel version.

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
As far as we know, our computer has never had an undetected error.
		                                           -- Weisert

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