NAME
zyd
—
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 example scans for available networks:
# ifconfig zyd0 scan
The following hostname.if(5) example configures zyd0 to join network “mynwid”, using WPA key “mywpakey”, obtaining an IP address using DHCP:
nwid mynwid wpakey mywpakey dhcp
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 ALSO
arp(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.