path: root/share/man/man4/zyd.4

.\" $OpenBSD: zyd.4,v 1.4 2006/06/27 14:20:30 jsg Exp $
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.\" Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
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.Dd June 21, 2006
.Dt ZYD 4
.Os
.Sh NAME
.Nm zyd
.Nd Zydas ZD1211 USB IEEE 802.11b/g wireless network driver
.Sh SYNOPSIS
.Cd "# all architectures"
.Cd "zyd* at uhub? port ?"
.Sh DESCRIPTION
The
.Nm
driver provides support for wireless network adapters based around
the Zydas ZD1211 USB chip.
.Pp
The
.Nm
driver encapsulates all IP and ARP traffic as 802.11 frames,
though it can receive either 802.11 or 802.3 frames.
.Pp
These are the modes the
.Nm
driver can operate in:
.Bl -tag -width "IBSS-masterXX"
.It BSS mode
Also known as
.Em infrastructure
mode, this is used when associating with an access point, through
which all traffic passes.
This mode is the default.
.It IBSS mode
Also known as
.Em IEEE ad-hoc
mode or
.Em peer-to-peer
mode.
This is the standardized method of operating without an access point.
Stations associate with a service set.
However, actual connections between stations are peer-to-peer.
.El
.Pp
.Nm
supports hardware WEP.
Wired Equivalent Privacy (WEP) is the de facto encryption standard
for wireless networks.
It can be typically configured in one of three modes:
no encryption; 40-bit encryption; or 104-bit encryption.
Unfortunately, due to serious weaknesses in WEP protocol
it is strongly recommended that it not be used as the
sole mechanism to secure wireless communication.
WEP is not enabled by default.
.Sh CONFIGURATION
The
.Nm
driver can be configured at runtime with
.Xr ifconfig 8
or on boot with
.Xr hostname.if 5
using the following parameters:
.Bl -tag -width Ds
.It Cm bssid Ar bssid
Set the desired BSSID.
.It Fl bssid
Unset the desired BSSID.
The interface will automatically select a BSSID in this mode, which is
the default.
.It Cm chan Ar n
Set the channel (radio frequency) to be used by the driver based on
the given channel ID
.Ar n .
.It Fl chan
Unset the desired channel to be used by the driver.
The driver will automatically select a channel in this mode, which is
the default.
.It Cm media Ar media
The
.Nm
driver supports the following
.Ar media
types:
.Pp
.Bl -tag -width autoselect -compact
.It Cm autoselect
Enable autoselection of the media type and options.
.It Cm DS1
Set 802.11b DS 1Mbps operation.
.It Cm DS2
Set 802.11b DS 2Mbps operation.
.It Cm DS5
Set 802.11b DS 5.5Mbps operation.
.It Cm DS11
Set 802.11b DS 11Mbps operation.
.El
.It Cm mediaopt Ar opts
The
.Nm
driver supports the following media options:
.Bl -tag -width ibss
.It Cm ibss
Select Independent Basic Service Set (IBSS) operation.
.El
.It Fl mediaopt Ar opts
Disable the specified media options on the driver and return it to the
default mode of operation (BSS).
.It Cm nwid Ar id
Set the network ID.
The
.Ar id
can either be any text string up to 32 characters in length,
or a series of hexadecimal digits up to 64 digits.
An empty
.Ar id
string allows the interface to connect to any available access points.
By default the
.Nm
driver uses an empty string.
Note that network ID is synonymous with Extended Service Set ID (ESSID).
.It Cm nwkey Ar key
Enable WEP encryption using the specified
.Ar key .
The
.Ar key
can either be a string, a series of hexadecimal digits (preceded by
.Sq 0x ) ,
or a set of keys of the form
.Dq n:k1,k2,k3,k4 ,
where
.Sq n
specifies which of the keys will be used for transmitted packets,
and the four keys,
.Dq k1
through
.Dq k4 ,
are configured as WEP keys.
If a set of keys is specified, a comma
.Pq Sq \&,
within the key must be escaped with a backslash.
Note that if multiple keys are used, their order must be the same within
the network.
.Nm
is capable of using both 40-bit (5 characters or 10 hexadecimal digits)
or 104-bit (13 characters or 26 hexadecimal digits) keys.
.It Fl nwkey
Disable WEP encryption.
This is the default mode of operation.
.El
.Sh HARDWARE
The following devices are known to be supported by the
.Nm
driver:
.Pp
.Bl -tag -width Ds -offset indent -compact
.It 3COM 3CRUSB10075
.It Acer WLAN-G-US1
.It Airlink+ AWLL3025
.It AOpen 802.11g WL54
.It Asus WL-159g
.It Billion BiPAC 3011G
.It DrayTek Vigor 550
.It Edimax EW-7317UG
.It Fiberline Networks WL-43OU
.It iNexQ UR055g
.It Planet WL-U356
.It Planex GW-US54GZL
.It Planex GW-US54Mini
.It Sagem XG 760A
.It Sitecom WL-113
.It Sweex wireless USB 54 Mbps
.It Tekram/Siemens USB adapter
.It Telegent TG54USB
.It Trendnet TEW-424UB
.It Trendnet TEW-429UB
.It TwinMOS G240
.It X-Micro XWL-11GUZX
.It Yakumo QuickWLAN USB
.It Zyxel ZyAIR G-220
.El
.Sh FILES
The adapter needs some firmware files, which are loaded on demand by the
driver when the device is attached:
.Pp
.Bl -tag -width Ds -offset indent -compact
.It Pa /etc/firmware/zd1211
.El
.Sh EXAMPLES
The following
.Xr hostname.if 5
example configures zyd0 to join whatever network is available on boot,
using WEP key
.Dq 0x1deadbeef1 ,
channel 11, obtaining an IP address using DHCP:
.Bd -literal -offset indent
dhcp NONE NONE NONE nwkey 0x1deadbeef1 chan 11
.Ed
.Pp
Configure zyd0 for WEP, using hex key
.Dq 0x1deadbeef1 :
.Bd -literal -offset indent
# ifconfig zyd0 nwkey 0x1deadbeef1
.Ed
.Pp
Return zyd0 to its default settings:
.Bd -literal -offset indent
# ifconfig zyd0 -bssid -chan media autoselect \e
	nwid "" -nwkey
.Ed
.Pp
Join an existing BSS network,
.Dq my_net :
.Bd -literal -offset indent
# ifconfig zyd0 192.168.0.2 netmask 0xffffff00 nwid my_net
.Ed
.Sh SEE ALSO
.Xr arp 4 ,
.Xr ifmedia 4 ,
.Xr intro 4 ,
.Xr netintro 4 ,
.Xr usb 4 ,
.Xr hostname.if 5 ,
.Xr ifconfig 8
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Florian Stoehr .
.Sh CAVEATS
The
.Nm
driver does not support a lot of the functionality available in the hardware.
More work is required to properly support the IBSS, power management,
and selectable transmission rate features.