Re: [Libusb-win32-devel] Multiple interfaces

[Stephan M. <ste...@we...>]

This check has been added for the filter driver functionality. It should p=
revent
the filter driver from attaching itself to the child device nodes that Win=
dows
creates for each interface, it should only attach itself to the parent dev=
ice node.
If this check wouldn't be present a device with multiple interfaces would =
show=20
up multiple times in libusb's DLL.

I'll try to change this in future releases.

BTW, is anyone actually using libusb's filter driver functionality for any=
 real
project=3F I have plans to remove this feature in the near future because it=
 just
doesn't work properly and it won't probably work on Vista anyway.

Stephan


> There has been mention in the past of support for multiple interfaces in=
 the releasee notes, and that it should work. However there is a line in l=
ibusb=5Fdriver.c which explicitly prevents multiple interfaces from working:=

>=20
> =20
>=20
>   /* only attach the (filter) driver to USB devices, skip hubs */
>   /* and interfaces of composite devices */
>   if(!strstr(id, "usb\\") || strstr(id, "hub" || strstr(id, "&mi=5F"))
>     {
>       return STATUS=5FSUCCESS;
>     }
>=20
> However, commenting out the test for &mi seems to work fine and I can us=
e libusb on multiple interfaces.
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> =20
>=20
> Is there a reason why multiple interfaces have been disabled in this man=
ner, as I'd like my device to present a standard class interface (e.g. mou=
se) as well as my specialiased one=3F
>=20
> =20
>=20
> --=20
>=20
> Dan Ellis
>=20
> Newnham Research
>=20
> =20
>=20
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>=20
> -----------------------------------------------------------------
> =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F
> Libusb-win32-devel mailing list
> Lib...@li...
> https://lists.sourceforge.net/lists/listinfo/libusb-win32-devel
>=20


=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F
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