netdev - Re: [PATCH] net: allow CAP_NET_RAW to setsockopt SO

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Date:	Tue, 25 Oct 2011 00:58:19 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	zenczykowski@...il.com
Cc:	maze@...gle.com, netdev@...r.kernel.org
Subject: Re: [PATCH] net: allow CAP_NET_RAW to setsockopt SO_PRIORITY

From: Maciej Żenczykowski <zenczykowski@...il.com>
Date: Mon, 24 Oct 2011 21:47:18 -0700

> It is my belief that CAP_NET_ADMIN is and should continue to be about
> configuring the system as a whole, not about configuring per-socket
> or per-packet parameters.
> 
> Sending and receiving raw packets is what CAP_NET_RAW is all about.
> Hence it makes sense to allow a CAP_NET_RAW process to set the
> priority of sockets and thus packets it sends.

SO_PRIORITY influences the packet scheduler and internal
queueing policies, not just the packet contents that hit
the wire.

Thus CAP_NET_ADMIN is the appropriate capability check.
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