linux-kernel - Re: [PATCH] wireless: wext: allocate space for NULL-termination for 32byte SSIDs

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Message-Id: <200912160926.14062.holgerschurig@gmail.com>
Date:	Wed, 16 Dec 2009 09:26:13 +0100
From:	Holger Schurig <holgerschurig@...il.com>
To:	linux-wireless@...r.kernel.org
Cc:	Albert Cahalan <acahalan@...il.com>,
	Johannes Berg <johannes@...solutions.net>,
	m.hirsch@...mfeld.com, libertas-dev@...ts.infradead.org,
	dcbw@...hat.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, stable@...nel.org, daniel@...aq.de,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH] wireless: wext: allocate space for NULL-termination for  32byte SSIDs

> First of all, isn't TEST\0\0\0 simply the wrong length anyway?
> (that is, a length other than 32 is nonsense AFAIK)

No, the SSID IE in a beacon encodes also a length. So the beacons 
from SSID of TEST, TEST\0 and TEST\0\0\0 are different.

This is because in the beacon, the SSID is *NOT* an u8[32], but 
an IE, which is struct { u8 type, u8 length, u8 data[] };

-- 
http://www.holgerschurig.de
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