Bruce Simpson wrote:
Robert Watson wrote:
...
Do we have any of the necessary software parts to do simulated ATM
hardware similar to what if_tap does for Ethernet? Using the VIMAGE
stuff and virtual ATM hardware might open up the door to a more
accessible development and test environment. I did the NATM locking
work essentially "blind" due to a lack of test environment locally,
which seemed to work out, but a software test system would go a long
way.
Loopback would be possible, sure, but you are probably only going to
be able to simulate looped-back PVCs.
Fortunately, the ITU G.DMT mandated use of ATM for xDSL generally only
uses PVCs.
P.S. You can probably cut corners for the job, by only marshaling the
whole packet payloads for NATM across the loopback boundary.
There is little point in simulating the 53 byte cell
segmentation-and-reassembly unless you love masochism.
Of course, NATM makes the job somewhat easier, by giving you some
equivalent knobs -- stuff stashed in NATM socket state usually winds up
in the cell headers.
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