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       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 in a wireless
       network interface and to read back quality of link  infor­
       mation  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 add some overhead in
       the driver.

       Note the this functionality work only for node part of the
       current wireless cells.


       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 work
              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 cur­
              rent 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 driver that support it).
              Every time  the  signal  strengh  for  any  of  the
              address  monitored  with  iwspy goes lower than the
              low threshold or goes higher than the high  thresh­
              old, a Wireless Event will be generated.
              This  can  be  used to monitor link outages without

net-tools                31 October 1996                 IWSPY(8)
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