generating ethernet packets

generating ethernet packets

[Massimiliano Cialdi]

I need to generate custom ethernet packets. I want to test a protocol.
How can I send my custom ethernet packets through the network? Do I need libpcap?

thanks

-- 
Massimiliano Cialdi
cialdi@firenze.net
m.cialdi@oksys.it

Re: generating ethernet packets

[syedk]

u can find a tool named nemesis in packetfactory.net..
after installing it u can generate custom ethernet traffic.
If u want to do it on your own u can use raw sockets.
otherwise u can use libnet
luv and seasons greetings
Syed SK
On Tue, 2003-12-30 at 20:05, Massimiliano Cialdi wrote:
> I need to generate custom ethernet packets. I want to test a protocol.
> How can I send my custom ethernet packets through the network? Do I need libpcap?
> 
> thanks
> 
> -- 
> Massimiliano Cialdi
> cialdi@firenze.net
> m.cialdi@oksys.it
> -
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Re: generating ethernet packets

[Progga]

On Tue, Dec 30, 2003 at 03:35:02PM +0100, Massimiliano Cialdi wrote:

> I need to generate custom ethernet packets. I want to test a protocol.
> How can I send my custom ethernet packets through the network? Do I need libpcap?

 Probably, the combination of ping's  "-p" and "-s" option can send custom 
packets.


 Khoda Hafez
 Progga

Re: generating ethernet packets

[Massimiliano Cialdi]

On 31 Dec 2003 10:07:57 +0530
syedk <syedk@intotoinc.com> wrote:

> If u want to do it on your own u can use raw sockets.
How can I generate an ethernet frame (with custom payload) with raw sockets?


thanks
-- 
Massimiliano Cialdi
cialdi@firenze.net
m.cialdi@oksys.it

Re: generating ethernet packets

[James Stevenson]

> > If u want to do it on your own u can use raw sockets.
> How can I generate an ethernet frame (with custom payload) with raw sockets?


Open a raw socket using the socket function.
Then use write to put the packet on the wire.

iirc there are 100's of example on doing this

	James

Re: generating ethernet packets

[Massimiliano Cialdi]

On Mon, 5 Jan 2004 03:58:32 +0000 (GMT)
James Stevenson <james@stev.org> wrote:

> > How can I generate an ethernet frame (with custom payload) with raw sockets?
> Open a raw socket using the socket function.
Which parameters do I need to pass to socket()?

> Then use write to put the packet on the wire.
How can I be sure that the datas will go on eth0 and not on ppp0?

> iirc there are 100's of example on doing this
where are all these examples?

it is also possible to generate an ethernet frame with wrong crc?

thanks

-- 
Massimiliano Cialdi
cialdi@firenze.net
m.cialdi@oksys.it

Re: generating ethernet packets

[Jan-Benedict Glaw]

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On Tue, 2004-01-06 12:30:19 +0100, Massimiliano Cialdi <cialdi@firenze.net>
wrote in message <20040106123019.76fd7d22.cialdi@firenze.net>:
> On Mon, 5 Jan 2004 03:58:32 +0000 (GMT)
> James Stevenson <james@stev.org> wrote:

> > iirc there are 100's of example on doing this
> where are all these examples?

Mailing lists aren't for saving you from asking some search engines. Try
this and read the first 20 hits.

http://www.google.de/search?hl=de&ie=UTF-8&oe=UTF-8&q=linux+socket+send+raw+ethernet&btnG=Google+Suche&meta=

> it is also possible to generate an ethernet frame with wrong crc?

Don't *ask*! That's something that you can easily try after getting your
basic program ready. Just prepare a wrongly CRCed frame and try to send
it. While doing so, let a tcpdump run on the local machine as well as on
some remote machine.

Oh, and results may be surprising.

MfG, JBG

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