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NetBSD 6.1.5 - man page for rtw (netbsd section 4)

RTW(4)				   BSD Kernel Interfaces Manual 			   RTW(4)

     rtw -- Realtek RTL8180L IEEE 802.11b wireless network driver

     rtw* at cardbus? function ?
     rtw* at pci? dev ? function ?

     The rtw driver supports PCI/CardBus 802.11b wireless adapters based on the Realtek RTL8180L.

     A variety of radio transceivers can be found in these devices, including the Philips
     SA2400A, Maxim MAX2820, and GCT GRF5101, though not all of them are currently supported.

     These are the modes the rtw driver can operate in:

     BSS mode	    Also known as infrastructure mode, this is used when associating with an
		    access point, through which all traffic passes.  This mode is the default.

     IBSS mode	    Also known as IEEE ad-hoc mode or peer-to-peer mode.  This is the standard-
		    ized method of operating without an access point.  Stations associate with a
		    service set.  However, actual connections between stations are peer-to-peer.

     Host AP	    In this mode the driver acts as an access point (base station) for other

     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.

     rtw supports software WEP.  Wired Equivalent Privacy (WEP) is the de facto encryption stan-
     dard for wireless networks.  It can be typically configured in one of three modes: no
     encryption; 40-bit encryption; or 104-bit encryption.  Unfortunately, due to serious weak-
     nesses in WEP protocol it is strongly recommended that it not be used as the sole mechanism
     to secure wireless communication.	WEP is not enabled by default.

     The rtw driver can be configured at runtime with ifconfig(8) or on boot with ifconfig.if(5)
     using the following parameters:

     bssid bssid
	     Set the desired BSSID.

     -bssid  Unset the desired BSSID.  The interface will automatically select a BSSID in this
	     mode, which is the default.

     chan n  Set the channel (radio frequency) to be used by the driver based on the given chan-
	     nel ID n.

     -chan   Unset the desired channel to be used by the driver.  The driver will automatically
	     select a channel in this mode, which is the default.

     media media
	     The rtw driver supports the following media types:

	     autoselect  Enable autoselection of the media type and options.
	     DS1	 Set 802.11b DS 1Mbps operation.
	     DS2	 Set 802.11b DS 2Mbps operation.
	     DS5	 Set 802.11b DS 5.5Mbps operation.
	     DS11	 Set 802.11b DS 11Mbps operation.

     mediaopt opts
	     The rtw driver supports the following media options:

	     hostap   Select Host AP operation.
	     ibss     Select IBSS operation.
	     monitor  Select monitor mode.

     -mediaopt opts
	     Disable the specified media options on the driver and return it to the default mode
	     of operation (BSS).

     ssid id
	     Set the network ID.  The id can either be any text string up to 32 characters in
	     length, or a series of hexadecimal digits up to 64 digits.  An empty id string
	     allows the interface to connect to any available access points.  By default the rtw
	     driver uses an empty string.  Note that network ID is synonymous with Extended Ser-
	     vice Set ID (ESSID).

     nwkey key
	     Enable WEP encryption using the specified key.  The key can either be a string, a
	     series of hexadecimal digits (preceded by '0x'), or a set of keys of the form
	     ``n:k1,k2,k3,k4'', where 'n' specifies which of the keys will be used for transmit-
	     ted packets, and the four keys, ``k1'' through ``k4'', are configured as WEP keys.
	     If a set of keys is specified, a comma (',') within the key must be escaped with a
	     backslash.  Note that if multiple keys are used, their order must be the same within
	     the network.  rtw is capable of using both 40-bit (5 characters or 10 hexadecimal
	     digits) or 104-bit (13 characters or 26 hexadecimal digits) keys.

     -nwkey  Disable WEP encryption.  This is the default mode of operation.

     nwkey persist
	     Enable WEP encryption with the persistent key stored in the network card.

     The following adapters should work:

	   Card 			   Bus
	   Belkin F5D6020 V3		   CardBus
	   Buffalo WLI-CB-B11		   CardBus
	   Corega CG-WLCB11V3		   CardBus
	   D-Link DWL-610		   CardBus
	   Level-One WPC-0101		   CardBus
	   Linksys WPC11 v4		   CardBus
	   Netgear MA521		   CardBus
	   Ovislink AirLive WL-1120PCM	   CardBus
	   Planet WL-3553		   CardBus
	   TrendNET TEW-266PC		   CardBus
	   VCTnet PC-11B1		   CardBus

     The following ifconfig.if(5) example creates a host-based access point on boot:

	   inet NONE media autoselect \
		   mediaopt hostap ssid my_net chan 11

     Configure rtw0 for WEP, using hex key ``0x1deadbeef1'':

	   # ifconfig rtw0 nwkey 0x1deadbeef1

     Return rtw0 to its default settings:

	   # ifconfig rtw0 -bssid -chan media autoselect \
		   ssid "" -nwkey

     Join an existing BSS network, ``my_net'':

	   # ifconfig rtw0 netmask 0xffffff00 ssid my_net

     arp(4), cardbus(4), ifmedia(4), intro(4), netintro(4), pci(4), ifconfig.if(5), ifconfig(8)

     Realtek, http://www.realtek.com.tw.

     The rtw device driver first appeared in NetBSD 3.0 and then in OpenBSD 3.7.

     The rtw driver was written by David Young <dyoung@NetBSD.org> and ported to OpenBSD by
     Jonathan Gray <jsg@openbsd.org>, who wrote this man page.

     Only the Philips SA2400A and Maxim MAX2820 RF transceivers are known to work.  Devices
     incorporating a GCT RF transceiver are not supported due to a lack of documentation from

     While PCI devices will attach most of them are not able to transmit.

BSD					December 29, 2004				      BSD

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