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
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