linux-kernel - Re: [PATCH] usb: gadget: add RNDIS configfs option for Windows rndiscmp.inf compatibility

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Wed, 01 Mar 2017 09:57:10 +0100
From:   Krzysztof Opasiak <k.opasiak@...sung.com>
To:     David Lechner <david@...hnology.com>, linux-usb@...r.kernel.org
Cc:     Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: gadget: add RNDIS configfs option for Windows
 rndiscmp.inf compatibility



On 02/28/2017 10:58 PM, David Lechner wrote:
> This adds a new configfs attribute named `use_ms_rndiscmp`. It is a
> boolean value that is used to select the class/subclass/protocol used
> by the RNDIS function interface association descriptor. By default,
> this is 0x02 (Comm), 0x06 (Ethernet), 0xff (None). When the
> use_ms_rndiscmp attribute is set to true, the values 0xef (Misc),
> 0x04 (RNDIS), 0x01 (Ethernet) will be used instead. This class/subclass/
> protocol combination is recognized by the rndiscmp.inf file in Windows
> Vista and newer and will cause Windows to load the correct RNDIS driver
> without the need for a custom (signed) .inf file.
>

To be honest, I'm not very happy with this patch because it makes our 
ConfigFS interface inflexible.

Let's assume that any other combination of this attributes will be 
needed in a future and then what we are going to do with use_ms_rndiscmp 
attribute?

So instead of having single attribute which sets the whole triple of 
values to some hardcoded ones I would prefer to have one attribute per 
each of this values and allow user to set them to his own values from 
userspace.

Best regards,
-- 
Krzysztof Opasiak
Samsung R&D Institute Poland
Samsung Electronics