Unfortunately, I don't have any docs for this. Any others?
---
ChunYeow
On Fri, Nov 14, 2014 at 5:57 PM, Oleksij Rempel <linux@xxxxxxxxxxxxxxxx> wrote:
> Am 14.11.2014 um 10:06 schrieb Yeoh Chun-Yeow:
>> On Fri, Nov 14, 2014 at 4:54 PM, Oleksij Rempel <linux@xxxxxxxxxxxxxxxx> wrote:
>>> Am 14.11.2014 um 06:07 schrieb Chun-Yeow Yeoh:
>>>> Secured mesh encrypts the unicast mgmt frame using the same
>>>> key that used for encrypting the unicast data frame. The patch
>>>> "ath9k_htc_firmware: fix the offset of CCMP header for mesh
>>>> data frame" applied to open-ath9k-htc-firmware allows the
>>>> ath9k_htc to be loaded without "nohwcrypt=1". Unfortunately,
>>>> this is not working and we still need CCMP encryption of
>>>> management frames to be done in software. Fix this.
>>>>
>>>> This patch is tested with the following hardwares:
>>>> - TP-Link TL-WN821N v3 802.11n [Atheros AR7010+AR9287]
>>>> - AR9271 802.11n
>>>>
>>>> and managed to work with peer mesh STA equipped with ath9k.
>>>>
>>>> Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@xxxxxxxxx>
>>>> ---
>>>> drivers/net/wireless/ath/ath9k/htc_drv_main.c | 3 ++-
>>>> 1 file changed, 2 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
>>>> index 689ac99..d3f65a2 100644
>>>> --- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
>>>> +++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
>>>> @@ -1447,7 +1447,8 @@ static int ath9k_htc_set_key(struct ieee80211_hw *hw,
>>>> key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
>>>> if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
>>>> key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
>>>> - if (priv->ah->sw_mgmt_crypto &&
>>>> + if ((vif->type == NL80211_IFTYPE_MESH_POINT ||
>>>> + priv->ah->sw_mgmt_crypto) &&
>>>> key->cipher == WLAN_CIPHER_SUITE_CCMP)
>>>> key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
>>>> ret = 0;
>>>>
>>>
>>>
>>> Hmm.. may be we should generally do it here:
>>> if ((vif->type == NL80211_IFTYPE_ADHOC ||
>>> vif->type == NL80211_IFTYPE_MESH_POINT) &&
>>> (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
>>> key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
>>> !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
>>>
>>
>> Not so sure doing here is correctly. It is a pairwise key for unicast
>> management frame, right?
>
> yes.
> this code is identical to ath9k, so i will move it to common. This is
> the reason of my doubts.
>
>>> or probably set "sw_mgmt_crypto = true" in ath9k_hw_init_mfp() for all
>>> usb devices?
>>
>> All ath9k USB devices don't have MFP support?
>
> Hmm... do you have docs?
>
> --
> Regards,
> Oleksij
>
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