Re: Developing drivers for a USB-based network device. . .?
Re: Developing drivers for a USB-based network device. . .?
- Subject: Re: Developing drivers for a USB-based network device. . .?
- From: Josh Graessley <email@hidden>
- Date: Thu, 16 Aug 2007 10:20:12 -0700
On Aug 16, 2007, at 10:05 AM, Michael Williams wrote:
Hi All,
I'm sort of caught between two lists here: the USB and the
Networking list (obviously). That said, I could use a bit of
assistance.
Basically, I have a client that has a new USB wireless device (for
which I'll need to write a driver) that will need to provide
network access to various programs; no different than an average
network device. However, I completely lack understanding regarding
how these items interact and where they "meet". Keep in mind that
while I have done no OS X driver development, this is something
that I absolutely need to learn, so outsourcing isn't an option.
If it takes 6 weeks, or 6 months I need to do this personally. If
anyone could provide me with a quality, reasonably straight-forward
course to follow, it would be much appreciated.
Regards,
Michael
BTW, The actual product is similar in functionality to an EVDO
modem, but a bit proprietary.
I know a bit about interacting with the networking stack. I don't
know anything about USB though, so someone else will have to give you
pointers there.
You probably want to create an IONetworkingFamily based driver. There
is some IOKit mechanism for matching on your USB device so your
driver will be loaded automatically and a reference to the USB stacks
representation of the device (IOUSBInterface?) will be passed to the
driver (as the provider?).
If the device will look like Ethernet to the system, you want to
write an IOEthernetFamily based driver.
If the device will look like PPP to the system, you want to write a
serial driver (IOSerialFamily?).
If the device will look like something else, you want an
IONetworkingFamily driver I believe. You will need to pick a new
interface family and write the glue that allows IP and IPv6 to attach
to your interface. If you need to go this route and need more
details, just ask.
-josh
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