netdev - Writing a network protocol to communicate with a USB driver

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Message-ID: <c55a880b-6463-db1b-7cad-b522a8dcdba7@xaptum.com>
Date:   Tue, 26 May 2020 17:57:00 -0500
From:   Daniel Berliner <daniel.berliner@...tum.com>
To:     netdev@...r.kernel.org
Subject: Writing a network protocol to communicate with a USB driver

I am writing a USB driver that allows small USB devices to use their 
hosts internet connection. This involves the creation of a new protocol 
so userspace apps can create a socket for reading and writing. Instead 
of sending the data over the normal network chain the sock forwards that 
data to a USB driver which sends passes the data around around and can 
write data back.

What I think needs to happen is the protocol packetizes the data to be 
sent to the host, add the packets to an SKB then have the USB driver 
pose as a transport device to receive the frames. Much like ECM and EEM 
present as an Ethernet device on the SKBs chain. Does this make any sense?

Right now I am statically linking -- the drivers just know eachothers 
functions and make direct calls. I know this is not good practice and 
need to move the project past a "proof of concept" state with a better 
design. I am inexperienced with the Linux network stack so any 
suggestions would be appreciated.

Thanks,
Dan