UPGT(4)                   OpenBSD Programmer's Manual                  UPGT(4)

NAME
     upgt - Conexant/Intersil PrismGT SoftMAC USB IEEE 802.11b/g wireless net-
     work device

SYNOPSIS
     upgt* at uhub? port ?

DESCRIPTION
     The upgt driver supports the USB 2.0 Conexant/Intersil PrismGT series
     wireless adapters based on the GW3887 chipset.

     These are the modes the upgt 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 in-
                    ternal receive filter and enables the card to capture
                    packets from networks which it wouldn't normally have ac-
                    cess to, or to scan for access points.

     The upgt driver can be configured to use Wired Equivalent Privacy (WEP)
     or Wi-Fi Protected Access (WPA-PSK and WPA2-PSK).  WPA is the de facto
     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 upgt driver relies on the
     software 802.11 stack for both encryption and decryption of data frames.

     The upgt driver can be configured at runtime with ifconfig(8) or on boot
     with hostname.if(5).

FILES
     The driver needs a firmware file which is loaded when an interface is
     brought up:

           /etc/firmware/upgt-gw3887

     A prepackaged version of the firmware, designed to be used with
     pkg_add(1), can be found at:

           http://www.nazgul.ch/upgt/upgt-firmware-1.1.tgz

HARDWARE
     The following adapters should work:

           Belkin F5D7050 (version 1000)
           Cohiba Proto Board
           D-Link DWL-G120 Cohiba
           D-Link DWL-G122 rev A2
           FSC Connect2Air E-5400 USB D1700
           Gigaset USB Adapter 54
           Inventel UR045G
           IOGear GWU513
           Linksys WUSB54AG
           Linksys WUSB54G ver 2
           Medion MD40900
           Philips CPWUA054
           SMC EZ ConnectG SMC2862W-G
           Sagem XG703A
           Spinnaker DUT
           Spinnaker Proto Board
           Thomson SpeedTouch 121g

EXAMPLES
     The following hostname.if(5) example configures upgt0 to join whatever
     network is available on boot, using WEP key ``0x1deadbeef1'', channel 11,
     obtaining an IP address using DHCP:

           dhcp NONE NONE NONE nwkey 0x1deadbeef1 chan 11

     Configure upgt0 to join network ``my_net'' using WPA-PSK with passphrase
     ``my_passphrase'':

           # ifconfig upgt0 nwid my_net wpa wpapsk \
                   `wpa-psk my_net my_passphrase`

     Return upgt0 to its default settings:

           # ifconfig upgt0 -bssid -chan media autoselect \
                   nwid "" -nwkey -wpa -wpapsk

     Join an existing BSS network, ``my_net'':

           # ifconfig upgt0 192.168.1.1 netmask 0xffffff00 nwid my_net

SEE ALSO
     arp(4), ifmedia(4), intro(4), netintro(4), usb(4), hostname.if(5),
     ifconfig(8), wpa-psk(8)

HISTORY
     The upgt driver first appeared in OpenBSD 4.3.

AUTHORS
     The upgt driver was written by Marcus Glocker <mglocker@openbsd.org>.

     The hardware specification was reverse engineered by the people at
     http://www.prism54.org.

CAVEATS
     The upgt driver just supports the USB 2.0 devices (GW3887 chipset) but
     not the USB 1.0 devices containing the NET2280, ISL3880, and ISL3886
     chipsets.  Some further efforts would be necessary to add USB 1.0 support
     to the driver.

OpenBSD 4.7                    September 2, 2009                             2
