2015-08-28 12:06:45 +03:00
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.\" $NetBSD: rtwn.4,v 1.3 2015/08/28 09:06:45 nonaka Exp $
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2015-08-27 17:04:07 +03:00
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.\" $OpenBSD: rtwn.4,v 1.2 2015/07/09 11:28:53 stsp Exp $
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.\"
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.\" Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
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.\" Copyright (c) 2015 Stefan Sperling <stsp@openbsd.org>
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.\"
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.\" Permission to use, copy, modify, and distribute this software for any
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.\" purpose with or without fee is hereby granted, provided that the above
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.\" copyright notice and this permission notice appear in all copies.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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.\"
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.Dd August 27, 2015
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.Dt RTWN 4
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.Os
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.Sh NAME
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.Nm rtwn
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.Nd Realtek RTL8188CE/RTL8192CE PCIe IEEE 802.11b/g/n wireless network device
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.Sh SYNOPSIS
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.Cd "rtwn* at pci? dev ? function ?"
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.Sh DESCRIPTION
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The
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.Nm
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driver supports PCIe wireless network devices based on the Realtek
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RTL8188CE and RTL8192CE chipset.
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.Pp
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The RTL8188CE is a highly integrated 802.11n adapter that combines a MAC,
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a 1T1R capable baseband and an RF in a single chip.
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It operates in the 2GHz spectrum only.
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.Pp
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The RTL8192CE is a highly integrated multiple-in, multiple-out (MIMO)
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802.11n adapter that combines a MAC, a 2T2R capable baseband and an
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RF in a single chip.
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It operates in the 2GHz spectrum only.
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.Pp
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These are the modes the
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.Nm
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driver can operate in:
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.Bl -tag -width "IBSS-masterXX"
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.It BSS mode
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Also known as
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.Em infrastructure
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mode, this is used when associating with an access point, through
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which all traffic passes.
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This mode is the default.
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.It monitor mode
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In this mode the driver is able to receive packets without
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associating with an access point.
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This disables the internal receive filter and enables the card to
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capture packets from networks which it wouldn't normally have access to,
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or to scan for access points.
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.El
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.Pp
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The
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.Nm
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driver can be configured to use
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Wired Equivalent Privacy (WEP) or
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Wi-Fi Protected Access (WPA-PSK and WPA2-PSK).
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WPA is the current encryption standard for wireless networks.
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It is strongly recommended that WEP
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not be used as the sole mechanism
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to secure wireless communication,
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due to serious weaknesses in it.
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.Pp
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The
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.Nm
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driver can be configured at runtime with
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.Xr ifconfig 8
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or on boot with
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.Xr ifconfig.if 5 .
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.Sh FILES
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The driver needs the following firmware files,
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which are loaded when an interface is brought up:
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.Pp
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.Bl -tag -width Ds -offset indent -compact
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.It /libdata/firmware/if_rtwn/rtl8192cfw.bin
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.It /libdata/firmware/if_rtwn/rtl8192cfwU.bin
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.It /libdata/firmware/if_rtwn/rtl8192cfwU_B.bin
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.El
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.Sh EXAMPLES
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The following
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.Xr ifconfig.if 5
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example configures rtwn0 to join whatever network is available on boot,
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using WEP key
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.Dq 0x1deadbeef1 ,
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channel 11, obtaining an IP address using DHCP:
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.Bd -literal -offset indent
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nwkey 0x1deadbeef1 chan 11
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dhcp
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.Ed
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.Pp
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Join an existing BSS network,
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.Dq my_net :
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.Bd -literal -offset indent
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# ifconfig rtwn0 192.168.1.1 netmask 0xffffff00 nwid my_net
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.Ed
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "rtwn%d: could not read firmware ..."
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For some reason, the driver was unable to read the microcode file from the
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filesystem.
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The file might be missing or corrupted.
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.It "rtwn%d: device timeout"
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A frame dispatched to the hardware for transmission did not complete in time.
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The driver will reset the hardware.
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This should not happen.
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.El
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.Sh SEE ALSO
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.Xr arp 4 ,
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.Xr netintro 4 ,
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.Xr pci 4 ,
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2015-08-28 12:06:45 +03:00
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.Xr ifconfig.if 5 ,
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2015-08-27 17:04:07 +03:00
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.Xr wpa_supplicant.conf 5 ,
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.Xr ifconfig 8 ,
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.Xr wpa_supplicant 8
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Ox 5.8
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and in
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.Nx 8.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was written by
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.An Stefan Sperling
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.Aq stsp@openbsd.org
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for
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.Ox
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and ported to
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.Nx
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by
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.An NONAKA Kimihiro
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.Aq nonaka@NetBSD.org .
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It was based on the
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.Xr urtwn 4
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driver written by
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.An Damien Bergamini
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.Aq damien.bergamini@free.fr .
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.Sh CAVEATS
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The
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.Nm
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driver does not support any of the 802.11n capabilities offered by the
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adapters.
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Additional work is required in
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.Xr ieee80211 9
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before those features can be supported.
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