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 May 23, 2021 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 ASUS WL-167G V3 119.It Belkin F7D1101 v1 120.It D-Link DWA-131 A1 121.It EDUP EP-MS150N(W) 122.It Edimax EW-7622UMN 123.It Hercules HWGUn-54 124.It Hercules HWNUm-300 125.It Planex GW-USNano 126.It Sitecom WL-349 v1 127.It Sitecom WL-353 128.It Sweex LW154 129.It TRENDnet TEW-646UBH 130.It TRENDnet TEW-648UB 131.It TRENDnet TEW-649UB 132.El 133.Sh EXAMPLES 134Join an existing BSS network (i.e., connect to an access point): 135.Bd -literal -offset indent 136ifconfig wlan create wlandev rsu0 inet 192.168.0.20 \e 137 netmask 0xffffff00 138.Ed 139.Pp 140Join a specific BSS network with network name 141.Dq Li my_net : 142.Pp 143.Dl "ifconfig wlan create wlandev rsu0 ssid my_net up" 144.Pp 145Join a specific BSS network with 64-bit WEP encryption: 146.Bd -literal -offset indent 147ifconfig wlan create wlandev rsu0 ssid my_net \e 148 wepmode on wepkey 0x1234567890 weptxkey 1 up 149.Ed 150.Sh DIAGNOSTICS 151.Bl -diag 152.It "%s: failed load firmware of file rsu-rtl8712fw" 153For some reason, the driver was unable to read the microcode file from the 154filesystem. 155The file might be missing or corrupted. 156.It "device timeout" 157A frame dispatched to the hardware for transmission did not complete in time. 158The driver will reset the hardware. 159This should not happen. 160.El 161.Sh SEE ALSO 162.Xr intro 1 , 163.Xr netintro 4 , 164.Xr rsufw 4 , 165.Xr usb 4 , 166.Xr wlan 4 , 167.Xr arp 8 , 168.Xr hostapd 8 , 169.Xr ifconfig 8 , 170.Xr wpa_supplicant 8 171.Sh HISTORY 172The 173.Nm 174driver first appeared in 175.Ox 4.9 and 176.Fx 10.0 . 177.Sh AUTHORS 178.An -nosplit 179The 180.Nm 181driver was written by 182.An Damien Bergamini Aq Mt damien@openbsd.org 183and ported by 184.An Rui Paulo Aq Mt rpaulo@freebsd.org . 185The 802.11n support was added by 186.An Adrian Chadd Aq Mt adrian@freebsd.org . 187.Sh CAVEATS 188The 189.Nm 190driver currently does not support 802.11n transmit aggregation, 191either A-MSDU or A-MPDU. 192.Pp 193The 194.Nm 195driver does not capture management frames in non-monitor modes; 196without this limitation some firmware functions (e.g., 'join bss') 197will not work properly. 198