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AIRO(4) 										  AIRO(4)

NAME
       airo - Driver for the Aironet 802.11 ISA/PCI/PCMCIA 4500 & 4800 and Cisco 340

SYNOPSIS
       insmod airo.o [io=i,j,...]  [irq=i,j,...]  [basic_rate=n] [rates=i,j,...]  [ssids=i,j,...]
       [adhoc=1] [aux_bap=1] [auto_wep=1] [maxencrypt=n]

DESCRIPTION
       This driver is for Cisco 340 and Aironet 4500 and 4800 ISA/PCI/PCMCIA cards and 2.0 or 2.2
       kernels.   Just	for  fun,  I tested a 3500 for a total of 2 minutes and it seemed to work
       more or less.  (The configuration information displayed in the Config file  seemed  a  bit
       messed up.)

       The card will create an ethX device for each wireless card.  An entry for each device will
       be created under /proc/aironet/ethX with entries to view the status of the card	and  con-
       figure it.

/proc/aironet
       In the /proc/aironet partition there will be a subdirectory for each aironet interface. In
       that subdirectory are four files: Status, Config, WepKey, and SSID.

       Status Most of the fields in the Status file are self describing.  The Mode:  field  is	a
	      bitmask.	Here is the description from the programmer's manual:

		 Bit Meaning
		 0x0001 Configured
		 0x0002 MAC Enabled
		 0x0004 Receive Enabled
		 0x0010 In Sync
		 0x0020 Associated
		 0x8000 Error

	      I'm not sure what the units are in the Signal: field.

       Config The  Config  file  is  mode  up  of fields separated by newlines.  When setting the
	      fields, they can occur in any order.  If the values are in error,  a  sane  default
	      will  be	used.	Note,  there  must be exactly one space between the colon and the
	      value.

       Mode:  can be "adhoc" or "ESS".	Defaults to ESS.

       NodeName:
	      Can be up to 16 characters in length

       PowerMode:
	      Can be CAM (Constantly Awake Mode), PSP (Power Saving  something...),  PSPCAM  (you
	      guess...).  CAM is default.

       DataRates:
	      Must  be	separated  by  exactly	1  space.  The units are 500 kps.  So 2 is 1 mbs.
	      There can be up to 8 rates specified.  The basic rate set by setting the	high  bit
	      (bit 7).

       Channel:
	      Don't know anything about this except that you can set it...

       XmitPower:
	      Transmit power in milliwatts.

       WEP:   Can  be  open, encrypt, and shared, meaning no authentication, encrypted data only,
	      shared key authentication and encryption.  Note that when WEP is enabled	the  cur-
	      rent cards (as of 9/9/99) do not allow data rates above 2 mbs.

       Modulation:
	      Can be cck or mok.  Sets the modulation type for speeds above 2mbs.

       WepKey This  file allows all four wep keys to be set.  The key is set by writing the index
	      (0 == first key) of the key to be set, followed by a space, followed by the key  as
	      a string to the file.  Each octet must be written in hexadecimal with leading zeros
	      and separated by colons.	For security reasons the key  cannot  be  read	from  the
	      card.   Writing  to  this  file sets both the permanent and temporary key.  (Anyone
	      have a need for being able to write them separately?)  For example:

		   echo 0 12:04:78:9a:bc > /proc/aironet/eth0/WepKey

	      When the file is read, it shows the length of the keys that are set and  the  index
	      of the key that is set as the transmit key.

       APList Contains the list of MACs of the preferred APs.  Each MAC address must be separated
	      by a delimiter and each octet of the MAC should be separated  by	a  delimiter  and
	      each  octet  should  have  two digits.  01:02:03:04:05:06 and 01-02-03:04:05,06 are
	      valid.  1:2:3:4:5:6 is not.  I usually separate the MACs by linefeeds but any char-
	      acter works.

       SSID   The SSID file has the list of usable SSIDs. If the list is empty, it will associate
	      with any access point that it can find. The SSIDs are separated by line feeds. This
	      file may also be written to to change the list.

       Stats/StatsDelta
	      Basically  a dump of all the statistics of the card.  The source has provisions for
	      all the statistics even though by default a lot of them are turned off.  Stats give
	      the statistics from the time the card was powered up.  StatsDelta gives the statis-
	      tics from the time the statistics were last reset.  The  statistics  are	reset  by
	      opening the StatsDelta file for writing.

PARAMETERS
       io=i,j,...
	      Specifies  the set of ioports used by the driver.  This is only used for ISA cards.
	      The irq to be used will match the irq in the same position in  the  irq  list.   So
	      basically ioport at index i will be used with the irq at index i.

       irq=i,j,...
	      Specifies the set of interrupts are used by the driver.

       rates=i,j,...
	      A comma separated list of rates.	There are up to 8 of them.  They are specified in
	      512 kps units.

       basic_rate=n
	      Sets the basic rate of the card.	Same units as the rates.  (It must be one of  the
	      rates.)

       ssids=i,j,k
	      A  comma	separated list of ssids.  There can be up to 3.  They are a maximum of 32
	      characters.

       maxencrypt=n
	      Sets the maximum speed of the card when doing encryption.  If zero  (the	default),
	      it  is  not  used.  Units are in 512kbs.	Older cards could only do 2mbs (n=4) when
	      doing encryption, even though they could do 11 mbs without encryption.

       auto_wep=n
	      Turns on logic to cycle through the different WEP settings until the card  is  able
	      to associate.  It will also cycle through the wep keys.  n is the number of keys to
	      cycle through.  Note, it only cycles  through  the  keys	for  shared  mode.   When
	      encrypt is tried, it will use the permanent key index.  (See WepKey.)

       aux_bap=1
	      Enables logic that gets around bus timing problems on older cards with some boards.
	      The timing problem manifests itself when receiving packets bigger than 70 bytes.

SPECIFIC NOTES
       When used with PCMCIA cards, it must be used with the airo_cs module.

AUTHOR
       Benjamin C. Reed - breed@almaden.ibm.com

SEE ALSO
       airo_cs(4), cardmgr(8), pcmcia(5), insmod(1),

IBM Almaden Research Center		     10/25/00					  AIRO(4)
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