.\" $OpenBSD: rum.4,v 1.58 2016/06/16 17:25:32 martijn Exp $ .\" .\" Copyright (c) 2005-2007 .\" Damien Bergamini .\" .\" Permission to use, copy, modify, and distribute this software for any .\" purpose with or without fee is hereby granted, provided that the above .\" copyright notice and this permission notice appear in all copies. .\" .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR .\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. .\" .Dd $Mdocdate: June 16 2016 $ .Dt RUM 4 .Os .Sh NAME .Nm rum .Nd Ralink Technology/MediaTek USB IEEE 802.11a/b/g wireless network device .Sh SYNOPSIS .Cd "rum* at uhub? port ?" .Sh DESCRIPTION The .Nm driver supports USB 2.0 and PCI Express Mini Card wireless adapters based on the Ralink RT2501USB and RT2601USB chipsets. .Pp Ralink PCI Express Mini Card adapters show up as normal USB 2.0 devices and are thus handled by the .Nm driver. .Pp The RT2501USB chipset is the second generation of 802.11a/b/g adapters from Ralink. It consists of two integrated chips, an RT2571W MAC/BBP and an RT2528 or RT5226 radio transceiver. .Pp The RT2601USB chipset consists of two integrated chips, an RT2671 MAC/BBP and an RT2527 or RT5225 radio transceiver. This chipset uses the MIMO (multiple-input multiple-output) technology with multiple antennas to extend the operating range of the adapter and to achieve higher throughput. .Pp These are the modes the .Nm driver can operate in: .Bl -tag -width "IBSS-masterXX" .It BSS mode Also known as .Em infrastructure mode, this is used when associating with an access point, through which all traffic passes. This mode is the default. .It IBSS mode Also known as .Em IEEE ad-hoc mode or .Em peer-to-peer mode. This is the standardized method of operating without an access point. Stations associate with a service set. However, actual connections between stations are peer-to-peer. .It Host AP In this mode the driver acts as an access point (base station) for other cards. .It 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. .El .Pp The .Nm 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 communication, due to serious weaknesses in it. The .Nm driver relies on the software 802.11 stack for both encryption and decryption of data frames. .Pp The .Nm driver can be configured at runtime with .Xr ifconfig 8 or on boot with .Xr hostname.if 5 . .Sh FILES The following firmware file is loaded when an interface is brought up: .Pp .Bl -tag -width Ds -offset indent -compact .It /etc/firmware/rum-rt2573 .El .Sh HARDWARE The following adapters should work: .Pp .Bl -tag -width Ds -offset indent -compact .It 3Com Aolynk WUB320g .It Abocom WUG2700 .It Airlink101 AWLL5025 .It ASUS WL-167g ver 2 .It Atlantis Land A02-UP1-W54 .It Belkin F5D7050 ver 3 .It Belkin F5D9050 ver 3 .It Belkin F5D9050C .It Buffalo WLI-U2-SG54HG .It Buffalo WLI-U2-SG54HP .It Buffalo WLI-U2-G54HP .It CNet CWD-854 ver F .It Conceptronic C54RU ver 2 .It Corega CG-WLUSB2GL .It Corega CG-WLUSB2GO .It Corega CG-WLUSB2GPX .It D-Link DWA-110 .It D-Link DWA-111 .It "D-Link DWL-G122 rev C1" .It D-Link WUA-1340 .It Digitus DN-7003GR .It Edimax EW-7318Ug .It Edimax EW-7318USg .It Edimax EW-7618Ug .It Gigabyte GN-WB01GS .It Gigabyte GN-WI05GS .It Hawking HWUG1 .It Hawking HWU54DM .It Hercules HWGUSB2-54-LB .It Hercules HWGUSB2-54V2-AP .It LevelOne WNC-0301USB v3 .It Linksys WUSB200 .It Linksys WUSB54G rev C .It Linksys WUSB54GR .It Planex GW-US54HP .It Planex GW-US54Mini2 .It Planex GW-USMM .It Senao NUB-3701 .It Sitecom WL-113 ver 2 .It Sitecom WL-172 .It Sweex LW053 .It TP-LINK TL-WN321G .El .Sh EXAMPLES The following example scans for available networks: .Pp .Dl # ifconfig rum0 scan .Pp The following .Xr hostname.if 5 example configures rum0 to join network .Dq mynwid , using WPA key .Dq mywpakey , obtaining an IP address using DHCP: .Bd -literal -offset indent nwid mynwid wpakey mywpakey dhcp .Ed .Pp The following .Xr hostname.if 5 example creates a host-based access point on boot: .Bd -literal -offset indent mediaopt hostap nwid mynwid wpakey mywpakey inet 192.168.1.1 255.255.255.0 .Ed .Sh DIAGNOSTICS .Bl -diag .It "rum0: error N, could not read firmware ..." For some reason, the driver was unable to read the microcode file from the filesystem. The file might be missing or corrupted. .It "rum0: could not load 8051 microcode" An error occurred while attempting to upload the microcode to the onboard 8051 microcontroller unit. .It "rum0: 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. .El .Sh SEE ALSO .Xr arp 4 , .Xr ifmedia 4 , .Xr intro 4 , .Xr netintro 4 , .Xr usb 4 , .Xr hostname.if 5 , .Xr hostapd 8 , .Xr ifconfig 8 .Sh HISTORY The .Nm driver first appeared in .Ox 4.0 . .Sh AUTHORS The .Nm driver was written by .An Niall O'Higgins Aq Mt niallo@openbsd.org and .An Damien Bergamini Aq Mt damien.bergamini@free.fr . .Sh CAVEATS The .Nm driver supports automatic control of the transmit speed in BSS mode only. Therefore the use of a .Nm adapter in Host AP mode is discouraged. .Pp Host AP mode doesn't support power saving. Clients attempting to use power saving mode may experience significant packet loss (disabling power saving on the client will fix this).