1.\" $OpenBSD: urtw.4,v 1.4 2009/03/03 07:49:27 kevlo Exp $ 2.\" 3.\" Copyright (c) 2008 Weongyo Jeong <weongyo@FreeBSD.org> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: March 3 2009 $ 18.Os 19.Dt URTW 4 20.Sh NAME 21.Nm urtw 22.Nd Realtek RTL8187L USB IEEE 802.11b/g wireless network device 23.Sh SYNOPSIS 24.Cd "urtw* at uhub? port ?" 25.Sh DESCRIPTION 26The 27.Nm 28driver supports USB 802.11b/g wireless adapters based on the 29Realtek RTL8187L. 30.Pp 31These are the modes the 32.Nm 33driver can operate in: 34.Bl -tag -width "IBSS-masterXX" 35.It BSS mode 36Also known as 37.Em infrastructure 38mode, this is used when associating with an access point, through 39which all traffic passes. 40This mode is the default. 41.It IBSS mode 42Also known as 43.Em IEEE ad-hoc 44mode or 45.Em peer-to-peer 46mode. 47This is the standardized method of operating without an access point. 48Stations associate with a service set. 49However, actual connections between stations are peer-to-peer. 50.It monitor mode 51In this mode the driver is able to receive packets without 52associating with an access point. 53This disables the internal receive filter and enables the card to 54capture packets from networks which it wouldn't normally have access to, 55or to scan for access points. 56.El 57.Pp 58The 59.Nm 60driver can be configured to use 61Wireless Equivalent Privacy (WEP) or 62Wi-Fi Protected Access (WPA-PSK and WPA2-PSK). 63WPA is the de facto encryption standard for wireless networks. 64It is strongly recommended that WEP 65not be used as the sole mechanism 66to secure wireless communication, 67due to serious weaknesses in it. 68The 69.Nm 70driver relies on the software 802.11 stack for both encryption and decryption 71of data frames. 72.Pp 73The 74.Nm 75driver can be configured at runtime with 76.Xr ifconfig 8 77or on boot with 78.Xr hostname.if 5 . 79.Sh HARDWARE 80The following adapters should work: 81.Pp 82.Bl -tag -width Ds -offset indent -compact 83.It Netgear WG111v2 84.It Shuttle XPC Accessory PN20 85.It Surecom EP-9001-g rev 2A 86.El 87.Sh EXAMPLES 88The following 89.Xr hostname.if 5 90example configures urtw0 to join whatever network is available on boot, 91using WEP key 92.Dq 0x1deadbeef1 , 93channel 11, obtaining an IP address using DHCP: 94.Bd -literal -offset indent 95dhcp NONE NONE NONE nwkey 0x1deadbeef1 chan 11 96.Ed 97.Pp 98The following 99.Xr hostname.if 5 100example creates a host-based access point on boot: 101.Bd -literal -offset indent 102inet 192.168.1.1 255.255.255.0 NONE media autoselect \e 103 mediaopt hostap nwid my_net chan 11 104.Ed 105.Pp 106Configure urtw0 to join network 107.Dq my_net 108using WPA-PSK with passphrase 109.Dq my_passphrase : 110.Bd -literal -offset indent 111# ifconfig urtw0 nwid my_net wpa wpapsk \e 112 `wpa-psk my_net my_passphrase` 113.Ed 114.Pp 115Return urtw0 to its default settings: 116.Bd -literal -offset indent 117# ifconfig urtw0 -bssid -chan media autoselect \e 118 nwid "" -nwkey -wpa -wpapsk 119.Ed 120.Pp 121Join an existing BSS network, 122.Dq my_net : 123.Bd -literal -offset indent 124# ifconfig urtw0 192.168.1.1 netmask 0xffffff00 nwid my_net 125.Ed 126.Sh SEE ALSO 127.Xr arp 4 , 128.Xr ifmedia 4 , 129.Xr intro 4 , 130.Xr netintro 4 , 131.Xr usb 4 , 132.Xr hostname.if 5 , 133.Xr hostapd 8 , 134.Xr ifconfig 8 , 135.Xr wpa-psk 8 136.Pp 137RealTek Semiconductor: 138.Pa http://www.realtek.com.tw/ 139.Sh HISTORY 140The 141.Nm 142device driver first appeared in 143.Ox 4.5 . 144.Sh AUTHORS 145The 146.Nm 147driver was written by 148.An Weongyo Jeong Aq weongyo@FreeBSD.org . 149