Re: IWD 1.27 with brcmfmac not working for roaming

[James Prestwood <prestwoj@gmail.com>]

Hi Arend,

On 10/21/24 11:26 AM, Arend van Spriel wrote:
> On 10/21/2024 7:40 PM, Denis Kenzior wrote:
>> Hi Arend,
>>
>>>
>>> I have not seen patches for OWE in brcmfmac. Looking at the 
>>> supported ciphers:
>>
>> OWE is an AKM.  It still uses CCMP/CMAC underneath.
>
> My bad. Always confused by those concepts.
>
>>>
>>> Supported Ciphers:
>>>   * WEP40 (00-0f-ac:1)
>>>   * WEP104 (00-0f-ac:5)
>>>   * TKIP (00-0f-ac:2)
>>>   * CCMP-128 (00-0f-ac:4)
>>>   * CMAC (00-0f-ac:6)
>>>
>>> The error message seems to match with the above.
>>
>> I've never seen support for OWE in brcmfmac mentioned.  OWE requires 
>> CMD_AUTHENTICATE / CMD_ASSOCIATE (or CMD_EXTERNAL_AUTH) to derive the 
>> PMK, so iwd can't support it on FullMAC.
>
> I have never seen any mention of OWE either. Regarding 
> CMD_EXTERNAL_AUTH support I recently posted patches on linux-wireless 
> list as RFT. There has been zero feedback and so I assume also zero 
> interest. In order to use CMD_EXTERNAL_AUTH the firmware needs to 
> advertise "sae_ext" in fwcap debugfs file. So if Martin can check 
> that, ie:
>
> $ grep sae_ext /sys/kernel/debug/ieee80211/phy0/fwcap
>
> Regards,
> Arend

Maybe its just a naming issue, but is "sae_ext" only relevant for SAE? 
Not OWE? So would CMD_EXTERNAL_AUTH even matter in this case?

Thanks,

James