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.\" $OpenBSD: acx.4,v 1.31 2008/04/17 14:01:22 jmc Exp $
.\"
.\" Copyright (c) 2006 Theo de Raadt.
.\" Copyright (c) 2006 The DragonFly Project. 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.
.\" 3. Neither the name of The DragonFly Project nor the names of its
.\" contributors may be used to endorse or promote products derived
.\" from this software without specific, prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
.\" COPYRIGHT HOLDERS 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.
.\"
.Dd $Mdocdate: April 17 2008 $
.Os
.Dt ACX 4
.Sh NAME
.Nm acx
.Nd TI ACX100/ACX111 IEEE 802.11a/b/g wireless network device
.Sh SYNOPSIS
.Cd "acx* at cardbus?"
.Cd "acx* at pci?"
.Sh DESCRIPTION
The
.Nm
driver provides support for TI TNETW1100/TNETW1100B (ACX100) and
TNETW1130 (ACX111) based PCI/CardBus network adapters.
.Pp
The ACX100A and ACX100B are first generation 802.11b devices
from TI.
The ACX111 is a second generation device which supports 802.11b/g
and in some cases 802.11a.
.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.
.It Host AP
In this mode the driver acts as an access point (base station)
for other cards.
.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 for ACX111 and hardware WEP for ACX100.
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 transmit speed is user-selectable or can be adapted automatically by the
driver depending on the number of hardware transmission retries.
.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 a set of firmware files which are loaded when
an interface is brought up:
.Pp
.Bl -tag -width Ds -offset indent -compact
.It Pa /etc/firmware/tiacx100
.It Pa /etc/firmware/tiacx100r0D
.It Pa /etc/firmware/tiacx100r11
.It Pa /etc/firmware/tiacx111
.It Pa /etc/firmware/tiacx111c16
.It Pa /etc/firmware/tiacx111r16
.El
.Pp
These firmware files are not free because TI refuses
to grant distribution rights.
In fact they have rebuffed thousands
of attempts to start a dialogue on this issue.
As a result, even though
.Ox
includes the driver, the firmware files cannot be included and
users have to download these files on their own.
.Pp
A prepackaged version of the firmware, designed to be used with
.Xr pkg_add 1 ,
can be found at:
.Bd -literal -offset indent
http://www.nazgul.ch/acx/acx-firmware-1.4.tgz
.Ed
.Sh HARDWARE
The following cards are among those supported by the
.Nm
driver:
.Pp
.Bl -column -compact "Microcom Travelcard" "ACX111" "CardBus" "a/b/g" -offset 6n
.Em "Card Chip Bus Standard"
D-Link DWL-520+ ACX100 PCI b
D-Link DWL-650+ ACX100 CardBus b
D-Link DWL-G520+ ACX111 PCI b/g
D-Link DWL-G630+ ACX111 CardBus b/g
D-Link DWL-G650+ ACX111 CardBus b/g
Ergenic ERG WL-003 ACX100 CardBus b
Hamlet HNWP254 ACX111 CardBus b/g
Hawking HWP54G ACX111 PCI b/g
Linksys WPC54Gv2 ACX111 CardBus b/g
Microcom Travelcard ACX111 CardBus b/g
Netgear WG311v2 ACX111 PCI b/g
Sceptre SC254W+ ACX111 CardBus b/g
Tornado/ADT 211g ACX111 PCI b/g
USR USR5410 ACX111 CardBus b/g
USR USR5416 ACX111 PCI b/g
ZyXEL G-160 ACX111 CardBus b/g
ZyXEL G-360 EE ACX111 PCI b/g
.El
.Sh EXAMPLES
The following
.Xr hostname.if 5
example configures acx0 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
The following
.Xr hostname.if 5
example creates a host-based access point on boot:
.Bd -literal -offset indent
inet 192.168.1.1 255.255.255.0 NONE media autoselect \e
mediaopt hostap nwid my_net chan 11
.Ed
.Pp
Configure acx0 for WEP, using hex key
.Dq 0x1deadbeef1 :
.Bd -literal -offset indent
# ifconfig acx0 nwkey 0x1deadbeef1
.Ed
.Pp
Return acx0 to its default settings:
.Bd -literal -offset indent
# ifconfig acx0 -bssid -chan media autoselect \e
nwid "" -nwkey
.Ed
.Pp
Join an existing BSS network,
.Dq my_net :
.Bd -literal -offset indent
# ifconfig acx0 192.168.1.1 netmask 0xffffff00 nwid my_net
.Ed
.Sh SEE ALSO
.Xr arp 4 ,
.Xr cardbus 4 ,
.Xr ifmedia 4 ,
.Xr intro 4 ,
.Xr netintro 4 ,
.Xr pci 4 ,
.Xr hostname.if 5 ,
.Xr hostapd 8 ,
.Xr ifconfig 8
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 4.0 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Sepherosa Ziehau .
The manual page was written by
.An Sascha Wildner .
Both are based on the
.Pa http://wlan.kewl.org
project team's original code.
.Pp
The hardware specification was reverse engineered by the good folks at
.Pa http://acx100.sourceforge.net .
Without them this driver would not have been possible.
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