[ath9k-devel] AR-5008 HT support

[ath9k-devel] AR-5008 HT support

[Ben Gamari]

Hey all,

I have a AR-5008 that I use as an access point. While I get excellent
performance with it, any attempt to enable any of the HT capabilities flags in
hostapd.conf causes hostapd to fail at start-up with,
  rmdir[ctrl_interface]: no such file or directory
Any ideas what might cause such a failure? I'm fairly certain that this card
should have no problem with HT. Further information included below. I will
gladly try any patches people might want to check. Thanks,

- Ben


Device (lspci):
0b:00.0 Network controller: Atheros Communications Inc. AR5008 Wireless Network Adapter (rev 01)


iw list output:
[2145 ben at ben2 ~] $ iw list
Wiphy phy0
	Band 1:
		HT capabilities: 0x104e
			* 20/40 MHz operation
			* SM PS disabled
			* 40 MHz short GI
			* max A-MSDU len 3839
			* DSSS/CCK 40 MHz
		HT A-MPDU factor: 0x0003 (65535 bytes)
		HT A-MPDU density: 0x0006 (8 usec)
		HT MCS set: ff ff 00 00 00 00 00 00 00 00 00 00 01 00 00 00
		HT TX/RX MCS rate indexes supported:
			MCS index 0
			MCS index 1
			MCS index 2
			MCS index 3
			MCS index 4
			MCS index 5
			MCS index 6
			MCS index 7
			MCS index 8
			MCS index 9
			MCS index 10
			MCS index 11
			MCS index 12
			MCS index 13
			MCS index 14
			MCS index 15
		Frequencies:
			* 2412 MHz [1] (20.0 dBm)
			* 2417 MHz [2] (20.0 dBm)
			* 2422 MHz [3] (20.0 dBm)
			* 2427 MHz [4] (20.0 dBm)
			* 2432 MHz [5] (20.0 dBm)
			* 2437 MHz [6] (20.0 dBm)
			* 2442 MHz [7] (20.0 dBm)
			* 2447 MHz [8] (20.0 dBm)
			* 2452 MHz [9] (20.0 dBm)
			* 2457 MHz [10] (20.0 dBm)
			* 2462 MHz [11] (20.0 dBm)
			* 2467 MHz [12] (20.0 dBm) (passive scanning)
			* 2472 MHz [13] (20.0 dBm) (passive scanning)
			* 2484 MHz [14] (disabled)
		Bitrates:
			* 1.0 Mbps
			* 2.0 Mbps (short preamble supported)
			* 5.5 Mbps (short preamble supported)
			* 11.0 Mbps (short preamble supported)
			* 6.0 Mbps
			* 9.0 Mbps
			* 12.0 Mbps
			* 18.0 Mbps
			* 24.0 Mbps
			* 36.0 Mbps
			* 48.0 Mbps
			* 54.0 Mbps
	Band 2:
		HT capabilities: 0x104e
			* 20/40 MHz operation
			* SM PS disabled
			* 40 MHz short GI
			* max A-MSDU len 3839
			* DSSS/CCK 40 MHz
		HT A-MPDU factor: 0x0003 (65535 bytes)
		HT A-MPDU density: 0x0006 (8 usec)
		HT MCS set: ff ff 00 00 00 00 00 00 00 00 00 00 01 00 00 00
		HT TX/RX MCS rate indexes supported:
			MCS index 0
			MCS index 1
			MCS index 2
			MCS index 3
			MCS index 4
			MCS index 5
			MCS index 6
			MCS index 7
			MCS index 8
			MCS index 9
			MCS index 10
			MCS index 11
			MCS index 12
			MCS index 13
			MCS index 14
			MCS index 15
		Frequencies:
			* 5180 MHz [36] (30.0 dBm) (passive scanning, no IBSS)
			* 5200 MHz [40] (30.0 dBm) (passive scanning, no IBSS)
			* 5220 MHz [44] (30.0 dBm) (passive scanning, no IBSS)
			* 5240 MHz [48] (30.0 dBm) (passive scanning, no IBSS)
			* 5260 MHz [52] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5280 MHz [56] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5300 MHz [60] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5320 MHz [64] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5500 MHz [100] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5520 MHz [104] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5540 MHz [108] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5560 MHz [112] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5580 MHz [116] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5600 MHz [120] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5620 MHz [124] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5640 MHz [128] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5660 MHz [132] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5680 MHz [136] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5700 MHz [140] (30.0 dBm) (passive scanning, no IBSS, radar detection)
			* 5745 MHz [149] (30.0 dBm) (passive scanning, no IBSS)
			* 5765 MHz [153] (30.0 dBm) (passive scanning, no IBSS)
			* 5785 MHz [157] (30.0 dBm) (passive scanning, no IBSS)
			* 5805 MHz [161] (30.0 dBm) (passive scanning, no IBSS)
			* 5825 MHz [165] (30.0 dBm) (passive scanning, no IBSS)
		Bitrates:
			* 6.0 Mbps
			* 9.0 Mbps
			* 12.0 Mbps
			* 18.0 Mbps
			* 24.0 Mbps
			* 36.0 Mbps
			* 48.0 Mbps
			* 54.0 Mbps
	max # scan SSIDs: 4
	Supported interface modes:
		 * IBSS
		 * managed
		 * AP
		 * AP/VLAN
		 * monitor
		 * mesh point

[ath9k-devel] AR-5008 HT support

[Jouni Malinen]

On Sat, 2010-03-27 at 18:46 -0700, Ben Gamari wrote:
> I have a AR-5008 that I use as an access point. While I get excellent
> performance with it, any attempt to enable any of the HT capabilities flags in
> hostapd.conf causes hostapd to fail at start-up with,
>   rmdir[ctrl_interface]: no such file or directory

That message does not sound like anything that should be related to HT
configuration. Could you please send full output from hostapd when
started with verbose debugging (-dd on command line) and the
hostapd.conf file you used?

- Jouni

[ath9k-devel] AR-5008 HT support

[Ben Gamari]

On Sat, 27 Mar 2010 21:53:41 -0700, Jouni Malinen <jouni.malinen@atheros.com> wrote:
> On Sat, 2010-03-27 at 18:46 -0700, Ben Gamari wrote:
> > I have a AR-5008 that I use as an access point. While I get excellent
> > performance with it, any attempt to enable any of the HT capabilities flags in
> > hostapd.conf causes hostapd to fail at start-up with,
> >   rmdir[ctrl_interface]: no such file or directory
> 
> That message does not sound like anything that should be related to HT
> configuration. Could you please send full output from hostapd when
> started with verbose debugging (-dd on command line) and the
> hostapd.conf file you used?
> 

Here you are. Thanks,

- Ben


Hostapd output with no ht_capab flags
======================================================================
[1645 ben at ben2 ~] $ sudo hostapd -dd /etc/hostapd/hostapd.conf 
Configuration file: /etc/hostapd/hostapd.conf
ctrl_interface_group=0
Opening raw packet socket for ifindex -1215397900
BSS count 1, BSSID mask ff:ff:ff:ff:ff:ff (0 bits)
SIOCGIWRANGE: WE(compiled)=22 WE(source)=21 enc_capa=0xf
nl80211: Added 802.11b mode based on 802.11g information
Allowed channel: mode=1 chan=1 freq=2412 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=2 freq=2417 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=3 freq=2422 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=4 freq=2427 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=5 freq=2432 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=6 freq=2437 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=7 freq=2442 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=8 freq=2447 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=9 freq=2452 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=10 freq=2457 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=11 freq=2462 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=1 freq=2412 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=2 freq=2417 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=3 freq=2422 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=4 freq=2427 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=5 freq=2432 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=6 freq=2437 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=7 freq=2442 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=8 freq=2447 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=9 freq=2452 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=10 freq=2457 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=11 freq=2462 MHz max_tx_power=20 dBm
RATE[0] rate=10 flags=0x2
RATE[1] rate=20 flags=0x6
RATE[2] rate=55 flags=0x6
RATE[3] rate=110 flags=0x6
RATE[4] rate=60 flags=0x0
RATE[5] rate=90 flags=0x0
RATE[6] rate=120 flags=0x0
RATE[7] rate=180 flags=0x0
RATE[8] rate=240 flags=0x0
RATE[9] rate=360 flags=0x0
RATE[10] rate=480 flags=0x0
RATE[11] rate=540 flags=0x0
Passive scanning not supported
Flushing old station entries
Deauthenticate all stations
Mode: IEEE 802.11g  Channel: 8  Frequency: 2447 MHz
Using interface wlan0 with hwaddr 00:21:63:2f:fe:6f and ssid 'LittleGreenMen'
SSID - hexdump_ascii(len=14):
     4c 69 74 74 6c 65 47 72 65 65 6e 4d 65 6e         LittleGreenMen  
PSK (ASCII passphrase) - hexdump_ascii(len=11):
     54 68 65 72 65 52 4d 6f 6e 6b 73                  ThereRMonks     
PSK (from passphrase) - hexdump(len=32): b6 0a 50 48 eb 9a b7 30 60 f3 9f ff b1 92 d4 3a a4 55 e6 18 93 ac 8f 18 5f 27 16 ce 70 47 b9 b2
WPA: group state machine entering state GTK_INIT (VLAN-ID 0)
GMK - hexdump(len=32): [REMOVED]
GTK - hexdump(len=32): [REMOVED]
WPA: group state machine entering state SETKEYSDONE (VLAN-ID 0)
wlan0: Setup of interface done.
MGMT (TX callback) ACK


Hostapd output with e.g. ht_capab=[HT40+][SHORT-GI-20][SHORT-GI-40]
======================================================================
[1646 ben at ben2 ~] $ sudo hostapd -dd /etc/hostapd/hostapd.conf 
Configuration file: /etc/hostapd/hostapd.conf
ctrl_interface_group=0
Opening raw packet socket for ifindex -1217318924
BSS count 1, BSSID mask ff:ff:ff:ff:ff:ff (0 bits)
SIOCGIWRANGE: WE(compiled)=22 WE(source)=21 enc_capa=0xf
nl80211: Added 802.11b mode based on 802.11g information
Allowed channel: mode=1 chan=1 freq=2412 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=2 freq=2417 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=3 freq=2422 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=4 freq=2427 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=5 freq=2432 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=6 freq=2437 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=7 freq=2442 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=8 freq=2447 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=9 freq=2452 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=10 freq=2457 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=11 freq=2462 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=1 freq=2412 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=2 freq=2417 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=3 freq=2422 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=4 freq=2427 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=5 freq=2432 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=6 freq=2437 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=7 freq=2442 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=8 freq=2447 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=9 freq=2452 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=10 freq=2457 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=11 freq=2462 MHz max_tx_power=20 dBm
HT40: control channel: 8  secondary channel: 12
HT40 secondary channel 12 not allowed
Could not select hw_mode and channel. (-1)
wlan0: Unable to setup interface.
rmdir[ctrl_interface]: No such file or directory


hostap.conf
======================================================================
interface=wlan0
driver=nl80211
logger_syslog=-1
logger_syslog_level=2
logger_stdout=-1
logger_stdout_level=2
dump_file=/tmp/hostapd.dump
ctrl_interface=/var/run/hostapd
ctrl_interface_group=0
ssid=LittleGreenMen
hw_mode=g
channel=8
beacon_int=100
dtim_period=2
max_num_sta=255
rts_threshold=2347
fragm_threshold=2346
macaddr_acl=0
auth_algs=3
ignore_broadcast_ssid=0
wme_enabled=1
wme_ac_bk_cwmin=4
wme_ac_bk_cwmax=10
wme_ac_bk_aifs=7
wme_ac_bk_txop_limit=0
wme_ac_bk_acm=0
wme_ac_be_aifs=3
wme_ac_be_cwmin=4
wme_ac_be_cwmax=10
wme_ac_be_txop_limit=0
wme_ac_be_acm=0
wme_ac_vi_aifs=2
wme_ac_vi_cwmin=3
wme_ac_vi_cwmax=4
wme_ac_vi_txop_limit=94
wme_ac_vi_acm=0
wme_ac_vo_aifs=2
wme_ac_vo_cwmin=2
wme_ac_vo_cwmax=3
wme_ac_vo_txop_limit=47
wme_ac_vo_acm=0
ieee80211n=1
#ht_capab=[HT40+][SHORT-GI-20][SHORT-GI-40]
eapol_key_index_workaround=0
eap_server=0
own_ip_addr=127.0.0.1
wpa=2
wpa_passphrase=REDACTED
wpa_pairwise=TKIP CCMP

[ath9k-devel] AR-5008 HT support

[Jouni Malinen]

On Sun, 2010-03-28 at 13:57 -0700, Ben Gamari wrote:

> Hostapd output with e.g. ht_capab=[HT40+][SHORT-GI-20][SHORT-GI-40]

> HT40: control channel: 8  secondary channel: 12
> HT40 secondary channel 12 not allowed
> Could not select hw_mode and channel. (-1)
> wlan0: Unable to setup interface.

I would have hoped that the output here is clear enough to explain why
this does not work.. Please take a look at ht_capab documentation in
hostapd.conf to see which channels are allowed in HT40+ configuration.

- Jouni

[ath9k-devel] AR-5008 HT support

[Ben Gamari]

On Sun, 28 Mar 2010 14:06:45 -0700, Jouni Malinen <jouni.malinen@atheros.com> wrote:
> I would have hoped that the output here is clear enough to explain why
> this does not work.. Please take a look at ht_capab documentation in
> hostapd.conf to see which channels are allowed in HT40+ configuration.

Doh. Very sorry about that. Yes, the error would have been painfully obvious if
I had read it. Sorry to waste your time.

- Ben