UPGT(4) - Device Drivers Manual

UPGT(4) - Device Drivers Manual #

UPGT(4) - Device Drivers Manual

NAME #

upgt - Conexant/Intersil PrismGT SoftMAC USB IEEE 802.11b/g wireless network 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 associating 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 upgt 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 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 can be installed using fw_update(8).

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 example scans for available networks:

# ifconfig upgt0 scan

The following hostname.if(5) example configures upgt0 to join network “mynwid”, using WPA key “mywpakey”, obtaining an IP address using DHCP:

join mynwid wpakey mywpakey
inet autoconf

SEE ALSO #

arp(4), ifmedia(4), intro(4), netintro(4), usb(4), hostname.if(5), ifconfig(8)

HISTORY #

The upgt driver first appeared in OpenBSD 4.3.

AUTHORS #

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

This driver does not support powersave mode.

OpenBSD 7.5 - January 5, 2022