November 7, 2008

### NAME

iwn - Intel Wireless 4965AGN IEEE 802.11 driver

### SYNOPSIS

iwn* at pci? dev ? function ?

### DESCRIPTION

The iwn driver provides support for Intel Wireless WiFi Link 4965AGN Mini PCI Express network adapters.

By default, the iwn driver configures the adapter for BSS operation (aka infrastructure mode). This mode requires the use of an access point.

For more information on configuring this device, see ifconfig(8).

### CONFIGURATION

The iwn driver can be configured at runtime with ifconfig(8) 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 channel 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 iwn driver supports the following media types:

  autoselect
    Enable autoselection of the media type and options.

mediaopt opts
  The iwn driver supports the following media options:

  monitor
    Select monitor mode.

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

mode mode
  The iwn driver supports the following modes:

  11a
    Force 802.11a operation.
  11b
    Force 802.11b operation.
  11g
    Force 802.11g operation.

nwid 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 iwn driver uses an empty string. Note that network ID is synonymous with Extended Service 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 transmitted 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. iwn 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.

### EXAMPLES

The following example configures iwn0 to join whatever network is available on boot, using WEP key ``0x1deadbeef1'', channel 11, obtaining an IP address using DHCP:

  `

      dhcp NONE NONE NONE nwkey 0x1deadbeef1 chan 11

  `

Configure iwn0 for WEP, using hex key ``0x1deadbeef1'':

  `

      # ifconfig iwn0 nwkey 0x1deadbeef1

  `

Return iwn0 to its default settings:

  `

      # ifconfig iwn0 -bssid -chan media autoselect \
              nwid "" -nwkey

  `

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

  `

      # ifconfig iwn0 192.168.1.1 netmask 0xffffff00 nwid my_net

  `

### DIAGNOSTICS

iwn%d: 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.

iwn%d: fatal firmware error
  For some reason, the firmware crashed. The driver will reset the hardware. This should not happen.

iwn%d: radio is disabled by hardware switch
  The radio transmitter is off and thus no packet can go out. The driver will reset the hardware. Make sure the laptop radio switch is on.

iwn%d: error %d, could not read firmware %s
  For some reason, the driver was unable to read the firmware image from the filesystem. The file might be missing or corrupted.

iwn%d: firmware file too short: %d bytes
  The firmware image is corrupted and can't be loaded into the adapter.

iwn%d: could not load firmware
  An attempt to load the firmware into the adapter failed. The driver will reset the hardware.

### SEE ALSO

arp(4), ifmedia(4), intro(4), netintro(4), pci(4), ifconfig(8)

### AUTHORS

The iwn driver and this man page were written by Damien Bergamini <damien.bergamini@free.fr>
.