[ath9k-devel] Supported Wi-Fi direct of Android?

[ath9k-devel] Supported Wi-Fi direct of Android?

[Check Zhao]

Hi list,

I want to enable concurrently the wlan0 and p2p0 interface with the usb
wifi dongle on PCs,
It is similar to the Wi-Fi direct of Android-4.2.2(Samsung Galaxy Nexus).

I found out Galaxy Nexus Wi-Fi chip is Broadcom BCM4330, but I can't buy a
usb dongle used this chip, however I can buy TP-LINK TL-WN722N with using
ar9271( ath9k_htc driver).

Now I want to know if ath9k_htc driver support to enable concurrently the
wlan0 and p2p0 interface, and how to support this functionality with coding.

Please help!

Some reference information:

*http://readlist.com/lists/shmoo.com/hostap/3/15004.html*

------------------------------------------------------------------------------------------------------------------
*> To me it seem YanBo is working with a mac80211 driver and asking how to
> tell mac80211 it can support multiple (concurrent) interfaces.

Same like for cfg80211, advertise interface combinations? And if you
advertise a combination with P2P_DEVICE then wpa_s (with these patches)
will pick it up and create one.

johannes*
-------------------------------------------------------------------------------------------------------------------

Best Regards,

Chengyi
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[ath9k-devel] Supported Wi-Fi direct of Android?

[Arend van Spriel]

On 06/20/2013 02:44 PM, Check Zhao wrote:
> Hi list,
>
> I want to enable concurrently the wlan0 and p2p0 interface with the usb
> wifi dongle on PCs,
> It is similar to the Wi-Fi direct of Android-4.2.2(Samsung Galaxy Nexus).
>
> I found out Galaxy Nexus Wi-Fi chip is Broadcom BCM4330, but I can't buy
> a usb dongle used this chip, however I can buy TP-LINK TL-WN722N with
> using ar9271( ath9k_htc driver).
>
> Now I want to know if ath9k_htc driver support to enable concurrently
> the wlan0 and p2p0 interface, and how to support this functionality with
> coding.
>
> Please help!

 From the code:

static const struct ieee80211_iface_limit if_limits[] = {
	{ .max = 2,	.types = BIT(NL80211_IFTYPE_STATION) |
				 BIT(NL80211_IFTYPE_P2P_CLIENT) },
	{ .max = 2,	.types = BIT(NL80211_IFTYPE_AP) |
				 BIT(NL80211_IFTYPE_P2P_GO) },
};

static const struct ieee80211_iface_combination if_comb = {
	.limits = if_limits,
	.n_limits = ARRAY_SIZE(if_limits),
	.max_interfaces = 2,
	.num_different_channels = 1,
};

It has P2P support, but it is a mac80211 driver and it may need 
P2P_DEVICE support as well. Johannes?

Regards,
Arend

> Some reference information:
>
> /http://readlist.com/lists/shmoo.com/hostap/3/15004.html/
>
> ------------------------------------------------------------------------------------------------------------------
> /> To me it seem YanBo is working with a mac80211 driver and asking how to
>> tell mac80211 it can support multiple (concurrent) interfaces.
>
> Same like for cfg80211, advertise interface combinations? And if you
> advertise a combination with P2P_DEVICE then wpa_s (with these patches)
> will pick it up and create one.
>
> johannes/
> -------------------------------------------------------------------------------------------------------------------
>
> Best Regards,
>
> Chengyi
>

[ath9k-devel] Supported Wi-Fi direct of Android?

[Berg, Johannes]

> static const struct ieee80211_iface_limit if_limits[] = {
> 	{ .max = 2,	.types = BIT(NL80211_IFTYPE_STATION) |
> 				 BIT(NL80211_IFTYPE_P2P_CLIENT) },
> 	{ .max = 2,	.types = BIT(NL80211_IFTYPE_AP) |
> 				 BIT(NL80211_IFTYPE_P2P_GO) },
> };
> 
> static const struct ieee80211_iface_combination if_comb = {
> 	.limits = if_limits,
> 	.n_limits = ARRAY_SIZE(if_limits),
> 	.max_interfaces = 2,
> 	.num_different_channels = 1,
> };
> 
> It has P2P support, but it is a mac80211 driver and it may need P2P_DEVICE
> support as well. Johannes?

Not necessarily, no. It's an implementation choice.

johannes
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[ath9k-devel] Supported Wi-Fi direct of Android?

[Check Zhao]

Thanks a lot, Johannes, Arend,

I will debug this functionality with applied kernel patch '[RFC] cfg80211:
Android P2P-Device workaround' and wpa_s patch '[RFC] nl80211: allow
Android P2P functionality'.

BTW, please tell me, which version kernel and wpa_s should I use ?

Regards,

Chengyi
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