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Capture Wireless Traffic

Wireless Frame Format


Using Tcpdump

tcpdump -i <interface> -s 0 -nne 'wlan type <type> subtype <subtype>'
Note older versions of tcpdump and wireshark capture filter dosn't support the "wlan" keyword, just use "type <type> subtype <subtype>"

Sniffing wireless in monitor mode, ignore beacon's
tcpdump -i <interface> -s 0 -nne '(type mgt or type ctl or type data) and (not type mgt subtype beacon)'

typesubtype
mgtassoc-req
assoc-resp
reassoc-req
reassoc-resp
probe-req
probe-resp
beacon
atim
disassoc
auth
deauth
ctlps-poll
rts
cts
ack
cf-end
cf-end-ack
datadata
data-cf-ack
data-cf-poll
data-cf-ack-poll
null
cf-ack
cf-poll
cf-ack-poll
qos-data
qos-data-cf-ack
qos-data-cf-poll
qos-data-cf-ack-poll
qos
qos-cf-poll
qos-cf-ack-poll
Wlan Capture 


Using Wireshark

wlan.fc.type == 0           Management frames
wlan.fc.type == 1           Control frames
wlan.fc.type == 2           Data frames
wlan.fc.type_subtype == 0   Association request
wlan.fc.type_subtype == 1   Association response
wlan.fc.type_subtype == 2   Reassociation request
wlan.fc.type_subtype == 3   Reassociation response
wlan.fc.type_subtype == 4   Probe request
wlan.fc.type_subtype == 5   Probe response
wlan.fc.type_subtype == 8   Beacon
 
wlan.addr = 12:34:56:AB:CD:EF  Select frames where any of the four address
                               fields matches the given MAC address.


Wireshark Wlan Filter



Wireshark





















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