Multi-BSS support?

[brainstorm]

Thanks to people on issue #6! That issue/thread is gold to squeeze the performance of my Edimax AC1200 running on a RPi one ;)

Has someone out there managed to patch/tweak the driver so that it supports multiple Hostapd SSIDs?:

Tried to go with plain iw-tools, like I did a few years ago with ath9 and Madwifi's VAPs, but nowadays it seems that it's on hostapd's:

root@rpi:/etc/hostapd# iw phy0 interface add wlan0_guests type ap
You need to run a management daemon, e.g. hostapd,
see http://wireless.kernel.org/en/users/Documentation/hostapd
for more information on how to do that.

That is: http://wiki.stocksy.co.uk/wiki/Multiple_SSIDs_with_hostapd

Unfortunately, following that doc, when running iw list there's no "valid interface combinations" string, so it's a non-starter.

I suspect that the hardware can comfortably do multiple APs anyhow and it's just a partial driver implementation issue... or is it not?

Any pointers very welcome, @Woojoong, @tz1, @thorwald, @igorpecovnik, @evilJazz, @poliva!

[brainstorm]

Related/(duplicated?) with issue #24.

[brainstorm]

Just noticed the multiple ENODEV errno's when trying to add vifs in cfg80211_rtw_add_virtual_intf's IOCTL for the nl80211 wireless support in the kernel:

https://github.com/gnab/rtl8812au/blob/master/os_dep/linux/ioctl_cfg80211.c#L3396

In particular, when trying to add another AP via NL80211_IFTYPE_AP:

    case NL80211_IFTYPE_AP:
        ret = -ENODEV;
        break;
    default:
        ret = -ENODEV;
        DBG_871X("Unsupported interface type\n");
        break;

Doesn't support adding STA (clients either):

    case NL80211_IFTYPE_STATION:
        ret = -ENODEV;
        break;

Is this a HAL/firmware limitation then? How can I explore this further?