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From: Andrew Lunn <andrew@lunn.ch>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: Andrew Lunn <andrew@lunn.ch>,
	flamingice@sourmilk.net, linux-wireless@vger.kernel.org,
	linville@tuxdriver.com
Subject: Re: [PATCH] try 2: mac80211: Fix swapped parameters to ieee80211_set_channel()
Date: Thu, 13 Dec 2007 13:50:47 +0100	[thread overview]
Message-ID: <20071213125047.GD501@lunn.ch> (raw)
In-Reply-To: <1197549025.6558.253.camel@johannes.berg>

On Thu, Dec 13, 2007 at 01:30:25PM +0100, Johannes Berg wrote:
> 
> > iwconfig wlan0 freq 5240
> 
> man iwconfig(8)
> 
>        freq/channel
>               Set the operating frequency or channel in the  device.  A  value
>               below 1000 indicates a channel number, a value greater than 1000
>               is a frequency in Hz. You may append the suffix k, M or G to the
>               value  (for  example,  "2.46G"  for  2.46 GHz frequency), or add
>               enough ???0???.

Yup, see my last email. 

However this description does not match the implementation. The
implementation is that its a channel if e = 0. My "frequency" is > 1000,  
but it was still interpreted as a channel. Looking at the
implementation of iw_float2freq(), the description should be that a
value less than 1e9 is a channel. 

So there should really be a check in the user space tools which says
that values between 1000 and 1e9 are invalid. This would catch errors
like the one i made for both 2.4GHz and 5GHz.

     Andrew


  reply	other threads:[~2007-12-13 12:50 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-12-12 15:31 [PATCH] mac80211: Fix swapped parameters to ieee80211_set_channel() Andrew Lunn
2007-12-12 17:43 ` Johannes Berg
2007-12-12 18:02   ` [PATCH] try 2: " Andrew Lunn
2007-12-12 18:09     ` Johannes Berg
2007-12-13  0:16       ` Johannes Berg
2007-12-13 12:09         ` Andrew Lunn
2007-12-13 12:30           ` Johannes Berg
2007-12-13 12:50             ` Andrew Lunn [this message]
2007-12-13 12:53               ` Johannes Berg
2007-12-13 13:07                 ` [PATCH] wirelesstools: More user space validation of channel/frequency Andrew Lunn
2007-12-13 12:37           ` [PATCH] try 2: mac80211: Fix swapped parameters to ieee80211_set_channel() Andrew Lunn

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