Re: How to use software encryption with WEP and mac80211

[Larry Finger <larry.finger@lwfinger.net>]

Michael Buesch wrote:
> On Saturday 11 August 2007 17:05:28 Larry Finger wrote:
>> Michael Buesch wrote:
>>> On Saturday 11 August 2007 05:25:11 Larry Finger wrote:
>>>> What do I need to do to get mac80211 to do software encryption for WEP? My port of the PHY code from 
>>>> bcm43xx and the mac80211 front end works with WPA encryption. With WEP, it authenticates and 
>>>> associates, but never gets an IP number from DHCP. That indicates to me that the encryption is not 
>>>> set up correctly. I looked through the various definitions in include/net/mac80211.h, but nothing 
>>>> seems to apply.
>>> Which hw enc code do you use in that tree? The old softmac crap
>>> or my new code from bcm43xx-mac80211?
>> I had stripped out all the key stuff, but before that it was from bcm43xx-mac80211.
>>
>>> Anyway, if you want to disable hw enc, always set the force sw enc bit
>>> in the set_key function and return early:
>>>
>>> 	key->flags |= IEEE80211_KEY_FORCE_SW_ENCRYPT;
>>> 	return 0;
>> This doesn't seem to work. I had tried it before. I guess I put your code back in again.
> 
> bcm43xx-mac80211 hwenc code does not work with v3 firmware.
> There is no working hwenc code for v3 firmware.
> 
> The above code should work to enable swenc, unless there's a bug in mac80211.

It wasn't a bug in mac80211. In fact, it forces software encryption if the set_key callback is not 
specified. My problem was that the hw->flags were wrong in the initial registration of the iface. 
Both WEP and WPA are working now.

Larry