All of lore.kernel.org
 help / color / mirror / Atom feed
From: Martin Rusko <rusko@sunsite.mine.nu>
To: lartc@vger.kernel.org
Subject: [LARTC] Accepting packets with frame dest.addr. ff:ff:ff:ff:ff:ff for routing
Date: Thu, 22 Apr 2004 07:28:14 +0000	[thread overview]
Message-ID: <4087740E.5050008@sunsite.mine.nu> (raw)

Hi all,

do anybody know, whether is it possible to route packets incoming to 
ethernet interface as broadcasts?

~~~~~|WirelessDevice/WD|-----eth0-|LinuxRouter/RT|-eth1---(10.18.63.0/24)

tcpdump: listening on eth0
0:a:e6:ac:e8:7a ff:ff:ff:ff:ff:ff 98: 192.168.7.11 > 10.18.63.249: icmp: 
echo request (DF)
0:a:e6:ac:e8:7a ff:ff:ff:ff:ff:ff 98: 192.168.7.11 > 10.18.63.249: icmp: 
echo request (DF)

Please notice, that echo request packets are in ethernet frames, heading 
to broadcast address (ff:ff:ff:ff:ff:ff).

Linux kernel seems to be, that refuse to route such packets (not 
intented for the MAC address of eth0 interface). But that interface 
received that packets, as seen in running tcpdump session. When that 
frames has "correct" MAC addresses, I mean destination is not a 
broadcast address, the same packet (source IP, destination IP) is routed 
without any problem.

Do you have any explanation, for this? Or better, does any linux 
networking guru know some magic, how to make linux kernel start routing 
also broadcasted packets?

Any help will be much appreciated. Also, when more info, why I see such 
packets is needed, I'm ready to serve.

          Best regards

               mARTin

-- 
Martin Rusko
PhD student
Department of Automation and Measurement
Faculty of Mechanical Engineering
Slovak University of Technology
--
E-mail: rusko@sunsite.mine.nu
Web:    http://sunsite.mine.nu/~rusko
--
motto: We are Microsoft! Resistance is futile. Open your
        source code and prepare for assimilation.

_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

             reply	other threads:[~2004-04-22  7:28 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-04-22  7:28 Martin Rusko [this message]
2004-04-22 17:42 ` [LARTC] Accepting packets with frame dest.addr. ff:ff:ff:ff:ff:ff Tony Wasson
2004-04-23  8:50 ` Martin Rusko

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4087740E.5050008@sunsite.mine.nu \
    --to=rusko@sunsite.mine.nu \
    --cc=lartc@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.