URTW(4) OpenBSD Programmer's Manual URTW(4)NAMEurtw - Realtek RTL8187L/RTL8187B USB IEEE 802.11b/g wireless network
device
SYNOPSIS
urtw* at uhub? port ?
DESCRIPTION
The urtw driver supports USB 802.11b/g wireless adapters based on the
Realtek RTL8187L and RTL8187B.
These are the modes the urtw 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 urtw 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
communication, due to serious weaknesses in it. The urtw driver relies
on the software 802.11 stack for both encryption and decryption of data
frames.
The urtw driver can be configured at runtime with ifconfig(8) or on boot
with hostname.if(5).
HARDWARE
The following adapters should work:
Alfa AWUS036H
ASUS P5B Deluxe
Belkin F5D7050E
Linksys WUSB54GC v2
Netgear WG111v2
Netgear WG111v3
Shuttle XPC Accessory PN20
Sitecom WL-168 v1
Sitecom WL-168 v4
Surecom EP-9001-g rev 2A
TRENDnet TEW-424UB V3.xR
EXAMPLES
The following hostname.if(5) example configures urtw0 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 urtw0 to join network ``my_net'' using WPA with passphrase
``my_passphrase'':
# ifconfig urtw0 nwid my_net wpakey my_passphrase
Join an existing BSS network, ``my_net'':
# ifconfig urtw0 192.168.1.1 netmask 0xffffff00 nwid my_net
SEE ALSOarp(4), ifmedia(4), intro(4), netintro(4), usb(4), hostname.if(5),
hostapd(8), ifconfig(8)
Realtek Semiconductor: http://www.realtek.com.tw/
HISTORY
The urtw device driver first appeared in OpenBSD 4.5.
AUTHORS
The urtw driver was written by Weongyo Jeong <weongyo@FreeBSD.org>.
OpenBSD 4.9 November 1, 2010 OpenBSD 4.9