iwspy - phpMan

IWSPY(8)                   Linux Programmer’s Manual                  IWSPY(8)



NAME
       iwspy - Get wireless statistics from specific nodes

SYNOPSIS
       iwspy interface
       iwspy interface [+] DNSNAME | IPADDR | HWADDR [...]
       iwspy interface off
       iwspy interface setthr low high
       iwspy interface getthr

DESCRIPTION
       Iwspy is used to set a list of addresses to monitor in a wireless network interface
       and to read back quality of link information for each of those. This information is
       the  same  as the one available in /proc/net/wireless : quality of the link, signal
       strength and noise level.

       This information is updated each time a new packet is received, so each address  of
       the list adds some overhead in the driver.

       Note  that  this  functionality  works  only for nodes part of the current wireless
       cell, you can not monitor Access Points you are not associated with  (you  can  use
       Scanning  for that) and nodes in other cells. In Managed mode, in most case packets
       are relayed by the Access Point, in this case you will get the signal  strength  of
       the  Access  Point. For those reasons this functionality is mostly useful in Ad-Hoc
       and Master mode.

PARAMETERS
       You may set any number of addresses up to 8.

       DNSNAME | IPADDR
              Set an IP address, or in some cases a DNS name (using the name resolver). As
              the  hardware  works  with  hardware addresses, iwspy will translate this IP
              address through ARP.  In some case, this address might not  be  in  the  ARP
              cache  and  iwspy  will  fail.  In those case, ping(8) this name/address and
              retry.

       HWADDR Set a hardware (MAC) address (this address is not translated & checked  like
              the  IP  one).  The  address  must contain a colon (:) to be recognised as a
              hardware address.

       +      Add the new set of addresses at the end  of  the  current  list  instead  of
              replacing  it.  The  address  list  is  unique for each device, so each user
              should use this option to avoid conflicts.

       off    Remove the current list of addresses and disable the spy functionality

       setthr Set the low and high signal strength threshold  for  the  iwspy  event  (for
              drivers that support it).
              Every  time  the signal strength for any of the address monitored with iwspy
              goes lower than the low threshold or goes higher than the high threshold,  a
              Wireless Event will be generated.
              This can be used to monitor link outages without having to run iwspy period-
              ically.

       getthr Retrieve the current low and high signal strength threshold  for  the  iwspy
              event.


FILES
       /proc/net/wireless

SEE ALSO
       iwconfig(8), iwlist(8), iwevent(8), iwpriv(8), wireless(7).




net-tools                       31 October 1996                       IWSPY(8)

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