RSU(4) OpenBSD Programmer's Manual RSU(4)NAMErsu - Realtek RTL8188SU/RTL8192SU USB IEEE 802.11b/g/n wireless network
device
SYNOPSIS
rsu* at uhub? port ?
DESCRIPTION
The rsu driver supports USB 2.0 wireless network devices based on Realtek
RTL8188SU, RTL8191SU and RTL8192SU chipsets.
The RTL8188SU is a highly integrated 802.11n adapter that combines a MAC,
a 1T1R capable baseband and an RF in a single chip. It operates in the
2GHz spectrum only.
The RTL8191SU is a highly integrated multiple-in, single-out (MISO)
802.11n adapter that combines a MAC, a 1T2R capable baseband and an RF in
a single chip. It operates in the 2GHz spectrum only.
The RTL8192SU is a highly integrated multiple-in, multiple-out (MIMO)
802.11n adapter that combines a MAC, a 2T2R capable baseband and an RF in
a single chip. It operates in the 2GHz spectrum only.
These are the modes the rsu 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.
The rsu 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 rsu driver can be configured at runtime with ifconfig(8) or on boot
with hostname.if(5).
FILES
The driver needs at least version 1.1 of the following firmware file,
which is loaded when an interface is attached:
/etc/firmware/rsu-rtl8712fw
A prepackaged version of the firmware, designed to be used with
pkg_add(1), can be found at:
http://damien.bergamini.free.fr/packages/openbsd/rsu-firmware-1.1.tgz
HARDWARE
The following adapters should work:
ASUS USB-N10
D-Link DWA-131 A1
Hercules HWGUn-54
Hercules HWNUm-300
Planex GW-USNano
Sitecom WL-349 v1
Sitecom WL-353
Sweex LW154
TRENDnet TEW-648UB
TRENDnet TEW-649UB
EXAMPLES
The following hostname.if(5) example configures rsu0 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 rsu0 to join network ``my_net'' using WPA with passphrase
``my_passphrase'':
# ifconfig rsu0 nwid my_net wpakey my_passphrase
Join an existing BSS network, ``my_net'':
# ifconfig rsu0 192.168.1.1 netmask 0xffffff00 nwid my_net
DIAGNOSTICS
rsu%d: error %d, could not read firmware %s For some reason, the driver
was unable to read the microcode file from the filesystem. The file
might be missing or corrupted.
rsu%d: 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.
SEE ALSOarp(4), ifmedia(4), intro(4), netintro(4), usb(4), hostname.if(5),
ifconfig(8)HISTORY
The rsu driver first appeared in OpenBSD 4.9.
AUTHORS
The rsu driver was written by Damien Bergamini <damien@openbsd.org>
CAVEATS
The rsu driver does not support any of the 802.11n capabilities offered
by the adapters. Additional work is required in ieee80211(9) before
those features can be supported.
OpenBSD 4.9 December 18, 2010 OpenBSD 4.9
