1.\" $OpenBSD: rsu.4,v 1.11 2013/02/14 07:40:42 jmc Exp $ 2.\" $FreeBSD$ 3.\" 4.\" Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr> 5.\" 6.\" Permission to use, copy, modify, and distribute this software for any 7.\" purpose with or without fee is hereby granted, provided that the above 8.\" copyright notice and this permission notice appear in all copies. 9.\" 10.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17.\" 18.Dd April 4, 2018 19.Dt RSU 4 20.Os 21.Sh NAME 22.Nm rsu 23.Nd Realtek RTL8188SU/RTL8192SU USB IEEE 802.11b/g/n wireless network device 24.Sh SYNOPSIS 25To compile this driver into the kernel, 26place the following lines in your kernel configuration file: 27.Bd -ragged -offset indent 28.Cd "device ehci" 29.Cd "device uhci" 30.Cd "device ohci" 31.Cd "device usb" 32.Cd "device rsu" 33.Cd "device rsufw" 34.Cd "device wlan" 35.Ed 36.Pp 37Alternatively, to load the driver as a module at boot time, 38place the following lines in 39.Xr loader.conf 5 : 40.Bd -literal -offset indent 41if_rsu_load="YES" 42rsu-rtl8712fw_load="YES" 43.Ed 44.Sh DESCRIPTION 45The 46.Nm 47driver supports USB 2.0 wireless network devices based on Realtek 48RTL8188SU, RTL8191SU and RTL8192SU chipsets. 49.Pp 50The RTL8188SU is a highly integrated 802.11n adapter that combines 51a MAC, a 1T1R capable baseband and an RF in a single chip. 52It operates in the 2GHz spectrum only. 53.Pp 54The RTL8191SU is a highly integrated multiple-in, single-out (MISO) 55802.11n adapter that combines a MAC, a 1T2R capable baseband and an 56RF in a single chip. 57It operates in the 2GHz spectrum only. 58.Pp 59The RTL8192SU is a highly integrated multiple-in, multiple-out (MIMO) 60802.11n adapter that combines a MAC, a 2T2R capable baseband and an 61RF in a single chip. 62It operates in the 2GHz spectrum only. 63.Pp 64These are the modes the 65.Nm 66driver can operate in: 67.Bl -tag -width "IBSS-masterXX" 68.It BSS mode 69Also known as 70.Em infrastructure 71mode, this is used when associating with an access point, through 72which all traffic passes. 73This mode is the default. 74.It monitor mode 75In this mode the driver is able to receive packets without 76associating with an access point. 77This disables the internal receive filter and enables the card to 78capture packets from networks which it wouldn't normally have access to, 79or to scan for access points. 80.El 81.Pp 82The 83.Nm 84driver can be configured to use 85Wired Equivalent Privacy (WEP) or 86Wi-Fi Protected Access (WPA-PSK and WPA2-PSK). 87WPA is the de facto encryption standard for wireless networks. 88It is strongly recommended that WEP 89not be used as the sole mechanism 90to secure wireless communication, 91due to serious weaknesses in it. 92.Pp 93The 94.Nm 95driver can be configured at runtime with 96.Xr ifconfig 8 . 97.Sh FILES 98.Bl -tag -width ".Pa /usr/share/doc/legal/realtek.LICENSE" -compact 99.It Pa /usr/share/doc/legal/realtek.LICENSE 100.Nm 101firmware license 102.El 103.Pp 104The driver needs at least version 1.2 of the following firmware file, 105which is loaded when an interface is attached: 106.Pp 107.Bl -tag -width Ds -offset indent -compact 108.It Pa /boot/kernel/rsu-rtl8712fw.ko 109.El 110.Sh HARDWARE 111The 112.Nm 113driver provices support for Realtek RTL8188SU/RTL8192SU USB IEEE 802.11b/g/n 114wireless network adapters, including: 115.Pp 116.Bl -tag -width Ds -offset indent -compact 117.It ASUS USB-N10 118.It Belkin F7D1101 v1 119.It D-Link DWA-131 A1 120.It EDUP EP-MS150N(W) 121.It Edimax EW-7622UMN 122.It Hercules HWGUn-54 123.It Hercules HWNUm-300 124.It Planex GW-USNano 125.It Sitecom WL-349 v1 126.It Sitecom WL-353 127.It Sweex LW154 128.It TRENDnet TEW-646UBH 129.It TRENDnet TEW-648UB 130.It TRENDnet TEW-649UB 131.El 132.Sh EXAMPLES 133Join an existing BSS network (i.e., connect to an access point): 134.Bd -literal -offset indent 135ifconfig wlan create wlandev rsu0 inet 192.168.0.20 \e 136 netmask 0xffffff00 137.Ed 138.Pp 139Join a specific BSS network with network name 140.Dq Li my_net : 141.Pp 142.Dl "ifconfig wlan create wlandev rsu0 ssid my_net up" 143.Pp 144Join a specific BSS network with 64-bit WEP encryption: 145.Bd -literal -offset indent 146ifconfig wlan create wlandev rsu0 ssid my_net \e 147 wepmode on wepkey 0x1234567890 weptxkey 1 up 148.Ed 149.Sh DIAGNOSTICS 150.Bl -diag 151.It "%s: failed load firmware of file rsu-rtl8712fw" 152For some reason, the driver was unable to read the microcode file from the 153filesystem. 154The file might be missing or corrupted. 155.It "device timeout" 156A frame dispatched to the hardware for transmission did not complete in time. 157The driver will reset the hardware. 158This should not happen. 159.El 160.Sh SEE ALSO 161.Xr intro 1 , 162.Xr netintro 4 , 163.Xr rsufw 4 , 164.Xr usb 4 , 165.Xr wlan 4 , 166.Xr arp 8 , 167.Xr hostapd 8 , 168.Xr ifconfig 8 , 169.Xr wpa_supplicant 8 170.Sh HISTORY 171The 172.Nm 173driver first appeared in 174.Ox 4.9 and 175.Fx 10.0 . 176.Sh AUTHORS 177.An -nosplit 178The 179.Nm 180driver was written by 181.An Damien Bergamini Aq Mt damien@openbsd.org 182and ported by 183.An Rui Paulo Aq Mt rpaulo@freebsd.org . 184The 802.11n support was added by 185.An Adrian Chadd Aq Mt adrian@freebsd.org . 186.Sh CAVEATS 187The 188.Nm 189driver currently does not support 802.11n transmit aggregation, 190either A-MSDU or A-MPDU. 191.Pp 192The 193.Nm 194driver does not capture management frames in non-monitor modes; 195without this limitation some firmware functions (e.g., 'join bss') 196will not work properly. 197