iwspy - Get wireless statistics from specific nodes


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


   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

   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


   You may set any number of addresses up to 8.

          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

   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 periodically.

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




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


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