ZYD(4) OpenBSD Programmer's Manual ZYD(4)NAMEzyd - ZyDAS ZD1211/ZD1211B USB IEEE 802.11b/g wireless network device
SYNOPSIS
zyd* at uhub? port ?
DESCRIPTION
The zyd driver provides support for wireless network adapters based
around the ZyDAS ZD1211 and ZD1211B USB chips.
These are the modes the zyd 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 zyd 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 zyd driver relies on
the software 802.11 stack for both encryption and decryption of data
frames.
The zyd driver can be configured at runtime with ifconfig(8) or on boot
with hostname.if(5).
HARDWARE
The following devices are known to be supported by the zyd driver:
3COM 3CRUSB10075
Acer WLAN-G-US1
Airlink+ AWLL3025
Airlink 101 AWLL3026
AOpen 802.11g WL54
Asus A9T integrated wireless
Asus WL-159g
Belkin F5D7050 v.4000
Billion BiPAC 3011G
Buffalo WLI-U2-KG54L
CC&C WL-2203B
DrayTek Vigor 550
Edimax EW-7317UG
Edimax EW-7317LDG
Fiberline Networks WL-43OU
iNexQ UR055g
Linksys WUSBF54G
Longshine LCS-8131G3
MSI US54SE
Philips SNU5600
Planet WL-U356
Planex GW-US54GD
Planex GW-US54GXS
Planex GW-US54GZL
Planex GW-US54Mini
Safecom SWMULZ-5400
Sagem XG 760A
Sagem XG 76NA
Sandberg Wireless G54 USB
Sitecom WL-113
Sitecom WL-603
SMC SMCWUSB-G
Sweex wireless USB 54 Mbps
Tekram/Siemens USB adapter
Telegent TG54USB
Trendnet TEW-424UB rev A
Trendnet TEW-429UB
TwinMOS G240
US Robotics 5423
X-Micro XWL-11GUZX
Yakumo QuickWLAN USB
Zonet ZEW2501
ZyXEL G-202
ZyXEL ZyAIR G-220
FILES
The adapter needs some firmware files, which are loaded on demand by the
driver when a device is attached:
/etc/firmware/zd1211
/etc/firmware/zd1211b
EXAMPLES
The following hostname.if(5) example configures zyd0 to join whatever
network is available on boot, using WEP key ``0x1deadbeef1'', channel 11,
obtaining an IP address using DHCP:
dhcp NONE NONE NONE nwkey 0x1deadbeef1 chan 11
Configure zyd0 to join network ``my_net'' using WPA with passphrase
``my_passphrase'':
# ifconfig zyd0 nwid my_net wpakey my_passphrase
Join an existing BSS network, ``my_net'':
# ifconfig zyd0 192.168.0.2 netmask 0xffffff00 nwid my_net
DIAGNOSTICS
zyd%d: error %d, could not read firmware %s For some reason, the driver
was unable to read the firmware image from the filesystem. The file
might be missing or corrupted.
zyd%d: could not load firmware (error=%d) An error occurred while
attempting to upload the firmware to the onboard microcontroller unit.
zyd%d: could not send command (error=%s) An attempt to send a command to
the firmware failed.
zyd%d: sorry, radio %s is not supported yet Support for the specified
radio chip is not yet implemented in the driver. The device will not
attach.
zyd%d: device version mismatch: 0x%x (only >= 43.30 supported) Early
revisions of the ZD1211 chipset are not supported by this driver. The
device will not attach.
zyd%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 ALSOarp(4), ifmedia(4), intro(4), netintro(4), usb(4), hostname.if(5),
ifconfig(8)AUTHORS
The zyd driver was written by Florian Stoehr <ich@florian-stoehr.de>,
Damien Bergamini <damien@openbsd.org>, and Jonathan Gray
<jsg@openbsd.org>.
CAVEATS
The zyd driver does not support a lot of the functionality available in
the hardware. More work is required to properly support the IBSS and
power management features.
OpenBSD 4.9 November 1, 2010 OpenBSD 4.9
