This v5 addresses some shortcomings with the original logarithmic computations where the long double did not suffice for surveys with a lot of noise. We cap the values now and also use logarithm identities to simplify the computations. The license is also now following the license of the other files in place. With this I get: mcgrof@mouche ~/hostap/hostapd (git::master)$ grep acs /home/mcgrof/wpa/hostapd.conf channel=acs_survey acs_num_req_surveys=5 acs_roc_duration_ms=5 mcgrof@mouche ~/hostap/hostapd (git::master)$ sudo ./hostapd /home/mcgrof/wpa/hostapd.conf Configuration file: /home/mcgrof/wpa/hostapd.conf ACS: automatic channel selection started, this may take a bit ACS: Ideal chan: 149 (5745 MHz) Average interference factor: -4.000000 Using interface wlan0 with hwaddr 00:03:7f:11:a3:f3 and ssid 'pogo' I have verified the results by using the acs.git code: mcgrof@mouche ~/acs (git::master)$ sudo ./acs wlan0 wlan0: remain on freq: 2412 MHz, duration: 5ms, cookie e72a7400, completed: yes wlan0: remain on freq: 2417 MHz, duration: 5ms, cookie f73b2280, completed: yes wlan0: remain on freq: 2422 MHz, duration: 5ms, cookie f73b2280, completed: yes wlan0: remain on freq: 2427 MHz, duration: 5ms, cookie f73b2880, completed: yes wlan0: remain on freq: 2432 MHz, duration: 5ms, cookie f73b2880, completed: yes wlan0: remain on freq: 2437 MHz, duration: 5ms, cookie e72a7400, completed: yes wlan0: remain on freq: 2442 MHz, duration: 5ms, cookie e72a7400, completed: yes wlan0: remain on freq: 2447 MHz, duration: 5ms, cookie f73b2880, completed: yes wlan0: remain on freq: 2452 MHz, duration: 5ms, cookie f73b2880, completed: yes wlan0: remain on freq: 2457 MHz, duration: 5ms, cookie f73b2f80, completed: yes wlan0: remain on freq: 2462 MHz, duration: 5ms, cookie e72a7400, completed: yes wlan0: remain on freq: 5180 MHz, duration: 5ms, cookie f73b2f80, completed: yes wlan0: remain on freq: 5200 MHz, duration: 5ms, cookie f73b2b80, completed: yes wlan0: remain on freq: 5220 MHz, duration: 5ms, cookie e72a7400, completed: yes wlan0: remain on freq: 5240 MHz, duration: 5ms, cookie f73b2b80, completed: yes wlan0: remain on freq: 5260 MHz, duration: 5ms, cookie e72a7400, completed: yes wlan0: remain on freq: 5280 MHz, duration: 5ms, cookie f73b2b80, completed: yes ...etc... 10 surveys for 2412 MHz: 10.000000 10.000000 10.000000 10.000000 9.000000 10.000000 10.000000 10.000000 10.000000 10.000000 10 surveys for 2417 MHz: 10.000000 10.000000 10.000000 10.000000 10.000000 9.000000 10.000000 10.000000 9.000000 10.000000 10 surveys for 2422 MHz: 9.000000 8.000000 9.000000 9.000000 9.000000 9.000000 9.000000 9.000000 9.000000 9.000000 10 surveys for 2427 MHz: 9.000000 11.000000 10.000000 10.000000 10.000000 10.000000 10.000000 9.000000 11.000000 9.000000 10 surveys for 2432 MHz: 10.000000 10.000000 10.000000 10.000000 10.000000 10.000000 9.000000 10.000000 10.000000 10.000000 10 surveys for 2437 MHz: 8.000000 9.000000 9.000000 10.000000 9.000000 9.000000 9.000000 9.000000 10.000000 9.000000 10 surveys for 2442 MHz: 9.000000 9.000000 8.000000 8.000000 9.000000 9.000000 9.000000 9.000000 9.000000 10.000000 10 surveys for 2447 MHz: 11.000000 11.000000 11.000000 11.000000 10.000000 12.000000 10.000000 10.000000 10.000000 11.000000 10 surveys for 2452 MHz: 8.000000 9.000000 9.000000 9.000000 9.000000 9.000000 9.000000 9.000000 8.000000 9.000000 10 surveys for 2457 MHz: 9.000000 10.000000 10.000000 9.000000 10.000000 10.000000 10.000000 9.000000 10.000000 9.000000 10 surveys for 2462 MHz: 9.000000 9.000000 9.000000 9.000000 9.000000 10.000000 9.000000 9.000000 9.000000 9.000000 10 surveys for 5180 MHz: 1.000000 0.000000 0.000000 1.000000 1.000000 1.000000 1.000000 0.000000 1.000000 0.000000 10 surveys for 5200 MHz: 2.000000 2.000000 2.000000 2.000000 2.000000 2.000000 2.000000 2.000000 2.000000 2.000000 10 surveys for 5220 MHz: 2.000000 1.000000 2.000000 1.000000 2.000000 2.000000 2.000000 2.000000 2.000000 2.000000 10 surveys for 5240 MHz: 2.000000 2.000000 2.000000 2.000000 2.000000 2.000000 1.000000 2.000000 2.000000 2.000000 10 surveys for 5260 MHz: 3.000000 3.000000 3.000000 2.000000 3.000000 2.000000 3.000000 3.000000 3.000000 3.000000 10 surveys for 5280 MHz: 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 1.000000 3.000000 2.000000 2.000000 10 surveys for 5300 MHz: 2.000000 2.000000 2.000000 1.000000 1.000000 2.000000 1.000000 2.000000 1.000000 1.000000 10 surveys for 5320 MHz: 3.000000 3.000000 2.000000 3.000000 2.000000 3.000000 3.000000 3.000000 3.000000 3.000000 10 surveys for 5745 MHz: -2.000000 -2.000000 -2.000000 -1.000000 -1.000000 -1.000000 -1.000000 -2.000000 -2.000000 -2.000000 10 surveys for 5765 MHz: 1.000000 0.000000 1.000000 1.000000 1.000000 1.000000 0.000000 1.000000 0.000000 1.000000 10 surveys for 5785 MHz: -1.000000 -1.000000 0.000000 0.000000 0.000000 -1.000000 -1.000000 0.000000 0.000000 -1.000000 10 surveys for 5805 MHz: -1.000000 -1.000000 -1.000000 0.000000 0.000000 -1.000000 0.000000 -1.000000 0.000000 0.000000 10 surveys for 5825 MHz: -1.000000 -1.000000 -1.000000 -1.000000 -2.000000 -1.000000 -1.000000 -1.000000 -2.000000 -1.000000 2412 MHz: 9.900000 2417 MHz: 9.800000 2422 MHz: 8.900000 2427 MHz: 9.900000 2432 MHz: 9.900000 2437 MHz: 9.100000 2442 MHz: 8.900000 2447 MHz: 10.700000 2452 MHz: 8.800000 2457 MHz: 9.600000 2462 MHz: 9.100000 5180 MHz: 0.600000 5200 MHz: 2.000000 5220 MHz: 1.800000 5240 MHz: 1.900000 5260 MHz: 2.800000 5280 MHz: 3.200000 5300 MHz: 1.500000 5320 MHz: 2.800000 5745 MHz: -1.600000 5765 MHz: 0.700000 5785 MHz: -0.500000 5805 MHz: -0.500000 5825 MHz: -1.200000 Ideal freq: 5745 MHz Luis R. Rodriguez (4): hostapd: split up channel checking into helpers hostapd: add offchannel support hostapd: add survey dump support hostapd: add Automatic Channel Selection (ACS) support hostapd/Makefile | 12 + hostapd/config_file.c | 47 +++++- hostapd/defconfig | 25 +++ hostapd/hostapd.conf | 17 ++ src/ap/acs.c | 460 ++++++++++++++++++++++++++++++++++++++++++ src/ap/acs.h | 40 ++++ src/ap/ap_config.c | 15 ++ src/ap/ap_config.h | 4 + src/ap/ap_drv_ops.h | 26 +++ src/ap/drv_callbacks.c | 138 +++++++++++++ src/ap/hostapd.c | 2 + src/ap/hostapd.h | 24 +++ src/ap/hw_features.c | 188 +++++++++++------ src/drivers/driver.h | 171 ++++++++++++++++- src/drivers/driver_nl80211.c | 193 ++++++++++++++++++ 15 files changed, 1292 insertions(+), 70 deletions(-) create mode 100644 src/ap/acs.c create mode 100644 src/ap/acs.h -- 1.7.4.15.g7811d -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
