From: Jeremy Jackson <jerj@coplanar.net>
To: netdev@vger.kernel.org
Subject: adding tcpdump/OAM support to usb ATM devices
Date: Sun, 27 Apr 2008 17:31:53 -0400 [thread overview]
Message-ID: <1209331913.8768.214.camel@ragnarok> (raw)
who cares about ATM? Well anyone using ADSL/2/2+ high speed internet
access is stuck with it, and that's not a small number of people.
Diagnosing problems is often complicated by the fact that large backhaul
networks appear as only 1 IP hop in traceroute.
The goal is to support sending and receiving F5 OAM cells on a Linux
host, from in-use PVCs bound to a br2684 bridge, your typical USB ADSL
modem. The ATM OAM segment "ping" can be useful in troubleshooting, yet
few modems support it, and *none* return timing and other detailed
information.
The modems running embedded Linux internally (openwrt AR7 for example)
could also use this.
The question: what is the recommended way to push the captured cells to
userspace? raw ATM socket, netlink, packet socket, i'm not up to speed
here people!
in 2.6.22 drivers/usb/atm/usbatm.c::usbatm_extract_one_cell()
cells received for open PVC/SVC sockets are processed, however OAM cells
are dropped, and cells to unbound VPI/VCI are dropped.
This seems the likely place to route cells somewhere useful, but what
mechanism to use?
--
Jeremy Jackson
Coplanar Networks
(519)489-4903
http://www.coplanar.net
jerj@coplanar.net
next reply other threads:[~2008-04-27 21:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-27 21:31 Jeremy Jackson [this message]
2008-04-27 21:35 ` adding tcpdump/OAM support to usb ATM devices David Miller
2008-04-27 22:35 ` Jeremy Jackson
2008-04-28 14:18 ` Chas Williams (CONTRACTOR)
2008-04-28 15:54 ` Jeremy Jackson
2008-04-29 12:04 ` Chas Williams (CONTRACTOR)
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=1209331913.8768.214.camel@ragnarok \
--to=jerj@coplanar.net \
--cc=netdev@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.