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WPI(4)                   BSD Kernel Interfaces Manual                   WPI(4)

NAME
     wpi -- Intel PRO/Wireless 3945ABG IEEE 802.11a/b/g wireless network
     device

SYNOPSIS
     wpi* at pci?

DESCRIPTION
     The wpi driver provides support for Intel PRO/Wireless 3945ABG Mini PCI
     Express network adapters.

     These are the modes the wpi driver can operate in:

     BSS mode       Also known as infrastructure mode, this is used when asso-
                    ciating with an access point, through which all traffic
                    passes.  This mode is the default.

     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 wpi driver can be configured to use Wired Equivalent Privacy (WEP) or
     Wi-Fi Protected Access (WPA-PSK and WPA2-PSK).  WPA is the current
     encryption standard for wireless networks.  It is strongly recommended
     that WEP not be used as the sole mechanism to secure wireless communica-
     tion, due to serious weaknesses in it.  The wpi driver offloads both
     encryption and decryption of unicast data frames to the hardware for the
     CCMP cipher.

     The wpi 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 file,
     which is loaded when an interface is brought up:

           /etc/firmware/wpi-3945abg

     This firmware file is not free because Intel refuses to grant distribu-
     tion rights without contractual obligations.  As a result, even though
     OpenBSD includes the driver, the firmware file cannot be included and
     users have to download this file on their own.

     A prepackaged version of the firmware can be installed using
     fw_update(1).

EXAMPLES
     The following example scans for available networks:

           # ifconfig wpi0 scan

     The following hostname.if(5) example configures wpi0 to join network
     ``mynwid'', using WPA key ``mywpakey'', obtaining an IP address using
     DHCP:

           nwid mynwid
           wpakey mywpakey
           dhcp

DIAGNOSTICS
     wpi0: 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.

     wpi0: fatal firmware error  For some reason, the firmware crashed.  The
     driver will reset the hardware.  This should not happen.

     wpi0: Radio transmitter is off  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.

     wpi0: 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.

     wpi0: firmware file too short: N bytes  The firmware image is corrupted
     and can't be loaded into the adapter.

     wpi0: could not load firmware  An attempt to load the firmware into the
     adapter failed.  The driver will reset the hardware.

SEE ALSO
     arp(4), ifmedia(4), intro(4), netintro(4), pci(4), hostname.if(5),
     ifconfig(8)

AUTHORS
     The wpi driver was written by Damien Bergamini
     <damien.bergamini@free.fr>.

BSD                            February 15, 2014                           BSD