linux-kernel - Re: USBIP protocol

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Message-ID: <87ej47q5k8.fsf@basil.nowhere.org>
Date:	Fri, 29 Aug 2008 16:06:15 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Matthew Wilcox <matthew@....cx>
Cc:	Greg KH <greg@...ah.com>, bgmerrell@...ell.com,
	hirofuchi@...rs.sourceforge.net, linux-kernel@...r.kernel.org,
	usbip-devel@...ts.sourceforge.net
Subject: Re: USBIP protocol

Matthew Wilcox <matthew@....cx> writes:

> I'm in the middle of implementing a userspace client for usbip and I
> strongly feel that the protocol needs to be changed before it is merged.
>
>  - I'm unconvinced that TCP is the correct protocol to be running this over.
>    I understand the reluctance to use UDP, but the protocol is fundamentally
>    packet-based.  If TCP is used, the delimitation of packets within the
>    stream needs to be much more robust. 

If you want reliable transport with record boundaries an alternative
would be also SCTP. Main drawback is that firewalls often don't support it
though (but presumably that wouldn't be a big issue for this)

-Andi
-- 
ak@...ux.intel.com
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