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OTUS(4) Kernel Interfaces Manual OTUS(4) NAME otus -- Atheros USB IEEE 802.11a/g/n wireless network device SYNOPSIS otus* at uhub? port ? DESCRIPTION The otus driver supports USB 2.0 wireless network devices based on Atheros Communications AR9001U chipset. The AR9001U chipset is made of an AR9170 MAC/Baseband and an AR9101 (1T2R), AR9102 (2T2R) or AR9104 (dual-band 2T2R) Radio. These are the modes the otus driver can operate in: BSS mode Also known as infrastructure mode, this is used when associating with an access point, through which all traffic passes. This mode is the default. monitor mode In this mode the driver is able to receive packets without associating with an access point. This disables the internal receive filter and enables the card to capture packets from networks which it wouldn't normally have access to, or to scan for access points. The otus driver can be configured to use Wired Equivalent Privacy (WEP) or Wi-Fi Protected Access (WPA-PSK and WPA2-PSK). WPA is the de facto encryption standard for wireless networks. It is strongly recommended that WEP not be used as the sole mechanism to secure wireless communication, due to serious weaknesses in it. The otus driver can be configured at runtime with ifconfig(8) or on boot with ifconfig.if(5). FILES The driver needs at least version 1.0 of the following firmware files, which are loaded when an interface is attached: /libdata/firmware/if_otus/otus-init /libdata/firmware/if_otus/otus-main Although these firmware files are freely redistributable, their usage is restricted. HARDWARE The following adapters should work: Arcadyan WN7512 CACE AirPcap Nx D-Link DWA-130 rev D1 D-Link DWA-160 rev A1 D-Link DWA-160 rev A2 IO-Data WN-GDN/US2 NEC Aterm WL300NU-G Netgear WNDA3100 Netgear WN111 v2 Planex GW-US300 SMC SMCWUSB-N2 TP-Link TL-WN821N Ubiquiti SR71 USB Unex DNUA-81 Z-Com UB81 Z-Com UB82 ZyXEL NWD-271N EXAMPLES The following ifconfig.if(5) example configures otus0 to join whatever network is available on boot, using WEP key ``0x1deadbeef1'', channel 11, obtaining an IP address using DHCP: nwkey 0x1deadbeef1 chan 11 dhcp Join an existing BSS network, ``my_net'': # ifconfig otus0 192.168.1.1 netmask 0xffffff00 nwid my_net To use WPA, see wpa_supplicant(8) and wpa_supplicant.conf(5). DIAGNOSTICS otus%d: error %d, could not read firmware %s For some reason, the driver was unable to read the microcode file from the filesystem. The file might be missing or corrupted. otus%d: device timeout A frame dispatched to the hardware for transmission did not complete in time. The driver will reset the hardware. This should not happen. SEE ALSO arp(4), ifmedia(4), netintro(4), usb(4), wpa_supplicant.conf(5), ifconfig(8), wpa_supplicant(8) HISTORY The otus driver first appeared in OpenBSD 4.6. It was ported to NetBSD by Anon Ymous and first appeared in NetBSD 6.0. AUTHORS The otus driver was written by Damien Bergamini <email@example.com> based on source code licensed under the ISC released in 2008 by Atheros Communications for Linux. CAVEATS The AVM FRITZ!WLAN USB Stick N adapter is currently not supported. The otus driver does not support any of the 802.11n capabilities offered by the AR9001U chipset. Additional work is required in ieee80211(9) before those features can be supported. The otus driver also does not currently support EDCA as this is missing in the NetBSD network stack. The hooks for it are in the driver code. NetBSD 7.1.2 November 4, 2010 NetBSD 7.1.2