1 .\" Jean II - HPLB - 96
4 .TH IWSPY 8 "31 October 1996" "net-tools" "Linux Programmer's Manual"
9 iwspy \- Get wireless statistics from specific nodes
14 .BI "iwspy " interface
16 .BI "iwspy " interface " [+] " DNSNAME " | " IPADDR " | " HWADDR " [...]"
18 .BI "iwspy " interface " off"
20 .BI "iwspy " interface " setthr " "low high"
22 .BI "iwspy " interface " getthr"
28 is used to set a list of addresses to monitor in a wireless network
29 interface and to read back quality of link information for each of
30 those. This information is the same as the one available in
32 : quality of the link, signal strength and noise level.
34 This information is updated each time a new packet is received, so
35 each address of the list adds some overhead in the driver.
37 Note that this functionality works only for nodes part of the current
38 wireless cell, you can not monitor Access Points you are not
39 associated with (you can use Scanning for that) and nodes in other
40 cells. In Managed mode, in most case packets are relayed by the Access
41 Point, in this case you will get the signal strength of the Access
42 Point. For those reasons this functionality is mostly useful in Ad-Hoc
48 You may set any number of addresses up to 8.
50 .BR DNSNAME " | " IPADDR
51 Set an IP address, or in some cases a DNS name (using the name
52 resolver). As the hardware works with hardware addresses,
54 will translate this IP address through
56 In some case, this address might not be in the ARP cache and
58 will fail. In those case,
60 this name/address and retry.
63 Set a hardware (MAC) address (this address is not translated & checked
64 like the IP one). The address must contain a colon
66 to be recognised as a hardware address.
69 Add the new set of addresses at the end of the current list instead of
70 replacing it. The address list is unique for each device, so each user
71 should use this option to avoid conflicts.
74 Remove the current list of addresses and disable the spy functionality
81 signal strength threshold for the iwspy event (for drivers that
84 Every time the signal strength for any of the address monitored
85 with iwspy goes lower than the low threshold or goes higher than the
86 high threshold, a Wireless Event will be generated.
88 This can be used to monitor link outages without having to run iwspy
96 signal strength threshold for the iwspy event.
101 .I /proc/net/wireless