ath - Atheros IEEE 802.11 wireless network driver
device ath device ath_hal device ath_rate_sample device wlan
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:
Supported features include 802.11 and 802.3 frames, power management, BSS, IBSS, and host-based access point operation modes. All host/device interaction is via DMA.
The driver encapsulates all IP and ARP traffic as 802.11 frames, however it can receive either 802.11 or 802.3 frames. Transmit speed and operating mode is selectable and depends on the specific chipset. AR5210-based devices support 802.11a operation with transmit speeds of 6 Mbps, 9 Mbps, 12 Mbps, 18 Mbps, 24 Mbps, 36 Mbps, 48 Mbps, and 54 Mbps. AR5211-based devices support 802.11a and 802.11b operation with transmit speeds as above for 802.11a operation and 1Mbps, 2Mbps, 5.5 Mbps and 11Mbps for 802.11b operation. AR5212-based devices support 802.11a, 802.11b, and 802.11g operation with transmit speeds appropriate to each. Most chips also support an Atheros Turbo Mode (TM) that operates in the 5Ghz frequency range with 2x the transmit speeds. Some chips also support Turbo mode in the 2.4Ghz range with 802.11g though this support is not presently available due to regulatory requirements. (Note that Turbo modes are, however, only interoperable with other Atheros-based devices.) The actual transmit speed used is dependent on signal quality and the ``rate control'' algorithm employed by the driver. All chips support WEP encryption. The AR5212 has hardware support for the AES-CCM, TKIP, and Michael cryptographic operations required for WPA. To enable encryption, use ifconfig(8) as shown below.
By default, the driver configures the card for BSS operation (aka infrastructure mode). This mode requires the use of an access point (base station).
The driver also supports the standard IBSS point-to-point mode where stations can communicate amongst themselves without the aid of an access point.
The driver may also be configured to operate in hostap mode. In this mode a host may function as an access point (base station). Access points are different than operating in IBSS mode. They operate in BSS mode. They allow for easier roaming and bridge all Ethernet traffic such that machines connected via an access point appear to be on the local Ethernet segment.
For more information on configuring this device, see ifconfig(8).
Devices supported by the driver come in either Cardbus or mini-PCI packages. Wireless cards in Cardbus slots may be inserted and ejected on the fly.
A list of cards that are supported can be found at http://customerproducts.atheros.com/customerproducts/default.asp
"ifconfig ath0 inet 192.168.0.20 netmask 0xffffff00"
Join a specific BSS network with network name ``my_net ''
"ifconfig ath0 inet 192.168.0.20 netmask 0xffffff00 ssid my_net"
Join a specific BSS network with WEP encryption:
ifconfig ath0 inet 192.168.0.20 netmask 0xffffff00 ssid my_net \ wepmode on wepkey 0x8736639624
Join/create an 802.11b IBSS network with network name ``my_net ''
ifconfig ath0 inet 192.168.0.22 netmask 0xffffff00 ssid my_net \ mode 11b mediaopt adhoc
Create an 802.11g host-based access point:
ifconfig ath0 inet 192.168.0.10 netmask 0xffffff00 ssid my_ap \ mode 11g mediaopt hostap
Create an 802.11a host-based access point with WEP enabled:
ifconfig ath0 inet 192.168.0.10 netmask 0xffffff00 ssid my_ap \ wepmode on wepkey 0x1234567890 mode 11a mediaopt hostap
Create a host-based wireless bridge to fxp0:
ifconfig ath0 inet up ssid my_ap media DS/11Mbps mediaopt hostap sysctl net.inet.ip.check_interface=0 ifconfig bridge0 create ifconfig bridge0 addm ath0 addm fxp0 up
This will give you the same functionality as an access point.
Revision A1 of the D-LINK DWL-G520 and DWL-G650 are based on an Intersil PrismGT chip and are not supported by this driver.
The driver does not fully enable power-save operation of the chip; consequently power use is suboptimal.
The driver honors the regulatory domain programmed into the EEPROM of a device and does not support overriding this setting. This is done to insure compliance with local regulatory agencies when operating as an access point. Unfortunately this also means that devices purchased for use in one locale may not be usable in another. Changes are planned to remove this restriction when operating in station mode.
WPA is not supported for 5210 parts.
Atheros' SuperG functionality is not supported.
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Created 1996-2022 by Maxim Chirkov
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