bbd2c2f158
Pointy hat to: brueffer
155 lines
4.5 KiB
Groff
155 lines
4.5 KiB
Groff
.\"
|
|
.\" Copyright (c) 2003 Tom Rhodes
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd November 26, 2005
|
|
.Dt WLAN 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm wlan
|
|
.Nd generic 802.11 link-layer support
|
|
.Sh SYNOPSIS
|
|
.Cd "device wlan"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
module provides generic code to support 802.11 drivers.
|
|
Where a device does not directly support 802.11 functionality
|
|
this layer fills in.
|
|
The
|
|
.Nm
|
|
is required for the
|
|
.Xr an 4 ,
|
|
.Xr ath 4 ,
|
|
.Xr awi 4 ,
|
|
.Xr ipw 4 ,
|
|
.Xr iwi 4 ,
|
|
.Xr ral 4 ,
|
|
.Xr ural 4 ,
|
|
and
|
|
.Xr wi 4
|
|
drivers, with other drivers to follow.
|
|
.Pp
|
|
The
|
|
.Nm
|
|
module supports multi-mode devices capable of
|
|
operating in both 2.4GHz and 5GHz bands and supports numerous
|
|
802.11 protocols: 802.11a, 802.11b, and 802.11g.
|
|
The WPA, 802.11i, and 802.1x security protocols are supported
|
|
through a combination of in-kernel code and user-mode applications.
|
|
The WME and WMM multi-media protocols are supported entirely within
|
|
the
|
|
.Nm
|
|
module but require a suitably capable hardware device.
|
|
.Pp
|
|
The
|
|
.Nm
|
|
module defines several mechanisms by which plugin modules may
|
|
be used to extend functionality.
|
|
Cryptographic support such as WEP, TKIP, and AES-CCMP are implemented
|
|
as modules that are loaded on demand (if not statically configured
|
|
into a system).
|
|
Similarly there is an authenticator framework for defining 802.11
|
|
authentication services and a framework for integrating access
|
|
control mechanisms specific to the 802.11 protocol.
|
|
.Sh DEBUGGING
|
|
If the associated interface is marked for debugging with, for example,
|
|
.Pp
|
|
.Dl "ifconfig wi0 debug"
|
|
.Pp
|
|
then messages describing the operation of the 802.11 protocol will
|
|
be sent to the console.
|
|
Complete debugging controls are available using:
|
|
.Pp
|
|
.Dl "sysctl net.wlan.X.debug=mask"
|
|
.Pp
|
|
where
|
|
.Ar X
|
|
is the number of the
|
|
.Nm
|
|
instance and mask is a bit-or of control bits that determine which
|
|
debugging messages to enable.
|
|
For example,
|
|
.Pp
|
|
.Dl "sysctl net.wlan.0.debug=0x00200000"
|
|
.Pp
|
|
enables debugging messages related to scanning for an access point,
|
|
adhoc neighbor, or an unoccupied channel when operation as an access point.
|
|
The
|
|
.Xr 80211debug
|
|
tool provides a more user-friendly mechanism for doing the same thing.
|
|
.Pp
|
|
Many drivers will also display the contents of each 802.11 frame
|
|
sent and received when the interface is marked with
|
|
both debugging and
|
|
.Cm link2 ;
|
|
e.g.,
|
|
.Pp
|
|
.Dl "ifconfig wi0 debug link2"
|
|
.Pp
|
|
Beware however that some management frames may be processed entirely within
|
|
the device and not be received by the host.
|
|
.Sh COMPATIBILITY
|
|
The module name of
|
|
.Nm
|
|
was used to be compatible with
|
|
.Nx .
|
|
.Sh SEE ALSO
|
|
.Xr an 4 ,
|
|
.Xr ath 4 ,
|
|
.Xr awi 4 ,
|
|
.Xr ipw 4 ,
|
|
.Xr iwi 4 ,
|
|
.Xr netintro 4 ,
|
|
.Xr ral 4 ,
|
|
.Xr ural 4 ,
|
|
.Xr wi 4 ,
|
|
.Xr wlan_acl 4 ,
|
|
.Xr wlan_ccmp 4 ,
|
|
.Xr wlan_tkip 4 ,
|
|
.Xr wlan_wep 4 ,
|
|
.Xr wlan_xauth 4
|
|
.Sh STANDARDS
|
|
More information can be found in the IEEE 802.11 Standard.
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
driver first appeared in
|
|
.Fx 5.0 .
|
|
.Sh AUTHORS
|
|
Atsushi Onoe is the author of original
|
|
.Nx
|
|
software from which this work began.
|
|
.An -nosplit
|
|
.An Sam Leffler
|
|
brought the code into
|
|
.Fx
|
|
and then rewrote it to support multi-mode devices,
|
|
802.11g, WPA/802.11i, WME, and add the extensible frameworks
|
|
for cryptographic, authentication, and access control plugins.
|
|
This manual page was written by
|
|
.An Tom Rhodes Aq trhodes@FreeBSD.org .
|