NAME
iwi
—
Intel PRO/Wireless
2200BG/2225BG/2915ABG IEEE 802.11a/b/g wireless network device
SYNOPSIS
iwi* at pci?
DESCRIPTION
The iwi
driver provides support for Intel
PRO/Wireless 2200BG/2915ABG Mini PCI and 2225BG PCI network adapters.
These are the modes the iwi
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.
- IBSS mode
- Also known as IEEE ad-hoc mode or 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.
- 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 iwi
driver can be configured to use
Wired Equivalent Privacy (WEP) or Wi-Fi Protected Access (WPA1 and WPA2).
WPA2 is the current encryption standard for wireless networks. It is
strongly recommended that neither WEP nor WPA1 are used as the sole
mechanism to secure wireless communication, due to serious weaknesses. WPA1
is disabled by default and may be enabled using the option
"wpaprotos
wpa1,wpa2". For standard WPA networks which use
pre-shared keys (PSK), keys are configured using the
"wpakey
" option. WPA-Enterprise networks
require use of the wpa_supplicant package. The iwi
driver relies on the software 802.11 stack for both encryption and
decryption of data frames.
The iwi
driver can be configured at
runtime with
ifconfig(8) or on boot with
hostname.if(5).
FILES
The driver needs at least version 3.1 of the following firmware files, which are loaded when an interface is brought up:
- /etc/firmware/iwi-bss
- /etc/firmware/iwi-ibss
- /etc/firmware/iwi-monitor
These firmware files are not free because Intel refuses to grant distribution rights without contractual obligations. As a result, even though OpenBSD includes the driver, the firmware files cannot be included and users have to download these files on their own. The official person to state your views to about this issue is majid.awad@intel.com.
A prepackaged version of the firmware can be installed using fw_update(1).
EXAMPLES
The following example scans for available networks:
# ifconfig iwi0 scan
The following hostname.if(5) example configures iwi0 to join network “mynwid”, using WPA key “mywpakey”, obtaining an IP address using DHCP:
nwid mynwid wpakey mywpakey dhcp
DIAGNOSTICS
- iwi0: device timeout
- The driver will reset the hardware. This should not happen.
- iwi0: error N, could not read firmware ...
- For some reason, the driver was unable to read the firmware image from the filesystem. The file might be missing or corrupted.
SEE ALSO
arp(4), ifmedia(4), intro(4), netintro(4), pci(4), hostname.if(5), ifconfig(8)
HISTORY
The iwi
driver first appeared in
OpenBSD 3.7.
AUTHORS
The iwi
driver was written by
Damien Bergamini
<damien.bergamini@free.fr>.
CAVEATS
This driver does not support powersave mode.