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.\" $OpenBSD: iwn.4,v 1.6 2008/04/17 14:01:22 jmc Exp $
.\"
.\" Copyright (c) 2007
.\" Damien Bergamini <damien.bergamini@free.fr>. All rights reserved.
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: April 17 2008 $
.Os
.Dt IWN 4
.Sh NAME
.Nm iwn
.Nd "Intel Wireless WiFi Link 4965AGN IEEE 802.11a/b/g/Draft-N wireless network device"
.Sh SYNOPSIS
.Cd "iwn* at pci?"
.Sh DESCRIPTION
The
.Nm
driver provides support for
.Tn Intel
Wireless WiFi Link 4965AGN Mini PCI Express network adapters.
.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 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.
.El
.Pp
.Nm
supports software 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.
.Pp
The device has one temperature sensor in degC.
Sensor data is updated every 500 milliseconds.
.Pp
The
.Nm
driver can be configured at runtime with
.Xr ifconfig 8
or on boot with
.Xr hostname.if 5 .
.Sh FILES
The driver needs at least version 4.44.1.20 of the following firmware file,
which is loaded when an interface is brought up:
.Pp
.Bl -tag -width Ds -offset indent -compact
.It Pa /etc/firmware/iwn-4965agn
.El
.Pp
This firmware file is not free because Intel refuses to grant
distribution rights without contractual obligations.
As a result, even though
.Ox
includes the driver, the firmware file cannot be included and
users have to download this file on their own.
The official person to state your views to about this issue is
majid.awad@intel.com.
.Pp
A prepackaged version of the firmware, designed to be used with
.Xr pkg_add 1 ,
can be found at:
.Bd -literal
http://damien.bergamini.free.fr/packages/openbsd/iwn-firmware-4.44.1.20.tgz
.Ed
.Sh EXAMPLES
The following
.Xr hostname.if 5
example configures iwn0 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 iwn0 for WEP, using hex key
.Dq 0x1deadbeef1 :
.Bd -literal -offset indent
# ifconfig iwn0 nwkey 0x1deadbeef1
.Ed
.Pp
Return iwn0 to its default settings:
.Bd -literal -offset indent
# ifconfig iwn0 -bssid -chan media autoselect \e
nwid "" -nwkey
.Ed
.Pp
Join an existing BSS network,
.Dq my_net :
.Bd -literal -offset indent
# ifconfig iwn0 192.168.1.1 netmask 0xffffff00 nwid my_net
.Ed
.Sh DIAGNOSTICS
.Bl -diag
.It "iwn%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.
.It "iwn%d: fatal firmware error"
For some reason, the firmware crashed.
The driver will reset the hardware.
This should not happen.
.It "iwn%d: radio is disabled by hardware switch"
The radio transmitter is off and thus no packet can go out.
The driver will reset the hardware.
Make sure the laptop radio switch is on.
.It "iwn%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.
.It "iwn%d: firmware file too short: %d bytes"
The firmware image is corrupted and can't be loaded into the adapter.
.It "iwn%d: could not load firmware"
An attempt to load the firmware into the adapter failed.
The driver will reset the hardware.
.El
.Sh SEE ALSO
.Xr pkg_add 1 ,
.Xr arp 4 ,
.Xr ifmedia 4 ,
.Xr intro 4 ,
.Xr netintro 4 ,
.Xr pci 4 ,
.Xr hostname.if 5 ,
.Xr ifconfig 8
.Rs
.%T The IPW Web Page
.%O http://damien.bergamini.free.fr/ipw/
.Re
.Sh AUTHORS
The
.Nm
driver was written by
.An Damien Bergamini Aq damien@openbsd.org .
|
