I have a device which is much, much more than an ethernet card, but it
also is an ethernet card. As it does not really fit any predefined
driver class, my current driver for it subclasses ioservice.
To handle the ethernet functionality of this card, I'd like to write
an ioethernetcontroller driver, rather than hooking directly into ifnet
like I did for the last version of the software. I got kinda sick
of tracking each little change to the network system, and it would
be nice for the interface to appear in the gui tools...
FWIW, the real driver is in charge of all hardware, and the ethernet
driver will just call functions in the main driver to do most of its
work. Its basically going to be a shim between iokit and the
platform-independant driver.
In reading the driver matching section of iokitfundamentals, it looks
like an iokit driver has to match on "something." Eg, the system has
to find new "hardware", you can't just load your driver and have it go
looking for something to match on. The match has to be initiated by
the OS finding something new.
Assuming this is correct, then I need to have the main driver publish
"something" that the ethernet driver can match on. I think I need to
have each instance of the main driver publish one "something" for a
corresponding instance of the ethernet driver to match on.
Am I on the right track? Can anybody suggest some sample code to read
which does something similar? Can the ethernet driver match on
something published by my main driver IOService::publishResource() ?
Thanks,
Drew
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