1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
.\" $OpenBSD: urtwn.4,v 1.22 2013/07/16 16:05:49 schwarze Exp $
.\"
.\" Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
.\"
.\" 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: July 16 2013 $
.Dt URTWN 4
.Os
.Sh NAME
.Nm urtwn
.Nd Realtek RTL8188CU/RTL8192CU USB IEEE 802.11b/g/n wireless network device
.Sh SYNOPSIS
.Cd "urtwn* at uhub? port ?"
.Sh DESCRIPTION
The
.Nm
driver supports USB 2.0 wireless network devices based on Realtek
RTL8188CUS, RTL8188CE-VAU, RTL8188RU and RTL8192CU chipsets.
.Pp
The RTL8188CUS 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 RTL8188RU is a high-power variant of the RTL8188CUS.
The RTL8188CE-VAU is a PCI Express Mini Card adapter that attaches
to the USB interface.
.Pp
The RTL8192CU 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.
.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 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 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.
.Pp
The
.Nm
driver can be configured at runtime with
.Xr ifconfig 8
or on boot with
.Xr hostname.if 5 .
.Sh FILES
The driver needs at least version 1.1p0 of the following firmware files,
which are loaded when an interface is attached:
.Pp
.Bl -tag -width Ds -offset indent -compact
.It /etc/firmware/urtwn-rtl8192cfwT
.It /etc/firmware/urtwn-rtl8192cfwU
.It /etc/firmware/urtwn-rtl8723fw
.El
.Pp
A prepackaged version of the firmware can be installed using
.Xr fw_update 1 .
.Sh HARDWARE
The following adapters should work:
.Pp
.Bl -tag -width Ds -offset indent -compact
.It Airlink101 AWLL5088
.It Alfa AWUS036NHR
.It Aus. Linx AL-9604R1S
.It B-Link BL-LW05-5R
.It Belkin F7D1102 Surf Wireless Micro
.It D-Link DWA-121
.It D-Link DWA-133
.It D-Link DWA-135
.It Digitus DN-7042
.It Edimax EW-7811Un
.It EDUP EP-N8508
.It Full River FR-W100NUL
.It Hercules Wireless N USB Pico HWNUp-150
.It Netgear WNA1000A
.It Planex GW-USEco300
.It Planex GW-USNano2
.It Planex GW-USValue-EZ
.It Planex GW-USWExtreme
.It POWCHIP POW-N18
.It Sitecom WL-365
.It Solwise NET-WL-UMD-606N
.It TRENDnet TEW-648UBM
.El
.Sh EXAMPLES
The following example scans for available networks:
.Pp
.Dl # ifconfig urtwn0 scan
.Pp
The following
.Xr hostname.if 5
example configures urtwn0 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
.Sh DIAGNOSTICS
.Bl -diag
.It "urtwn0: 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 "urtwn0: 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 ifconfig 8
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 4.9 .
.Sh AUTHORS
The
.Nm
driver was written by
.An Damien Bergamini Aq Mt damien@openbsd.org .
.Sh CAVEATS
The
.Nm
driver does not support any of the 802.11n capabilities offered by the
adapters.
Additional work is required in
.Xr ieee80211 9
before those features can be supported.
|
