net80211 has quite an extensive set of debugging utilities. This page attempts to cover some of these
net80211 debug flags
Each subsystem in net80211 has some debugging (to the kernel console) which can be selectively enabled and disabled.
This can be done via sysctl (net.wlan.X.debug) or via 'wlandebug'.
This requires IEEE80211_DEBUG to be enabled in your kernel. (Enabled by default on amd64, i386 and mips GENERIC kernel)
The various flags are defined in src/sys/net80211/ieee80211_var.h and begin with IEEE80211_MSG_.
The wlandebug tool is available in the base system.
The tool is in usr.sbin/wlandebug/.
It is a front-end to the sysctl method and debug bitmask flags above. To get a list of supported debug flags, do the following:
adrian@marilyn:~/work/freebsd/svn/src/sys/net80211]> wlandebug '-?' usage: wlandebug [-d | -i device] [flags] where flags are: 11n debug dumppkts crypto input xrate elemid node assoc auth scan output state power hwmp dot1xsm radius raddump mesh wpa acl wme superg doth inact roam rate action wds ioctl tdma
wlanstats is a tool which provides real time statistics about the current net80211 vap interface. Statistics are kept per-vap, even for multiple vaps on the same physical interface.
The tool is in src/tools/tools/net80211/wlanstats/.
To list the available statistics, use 'wlanstats -h'.
It can show both a summary of statistics and live statistics. To use live statistics, place a time interval on the command line. For example, wlanstats 1. '-o' can be used to select which statistics are to be shown.
To view a set of 802.11n aggregation related statistics, use wlanstats -o ampdu 1.
Here's an example output from the tool on an 802.11n station:
adrian@marilyn:~/work/freebsd/ath/head/src/tools/tools/net80211/wlanstats]> wlanstats 873372 rx from wrong bssid 4127 rx discard 'cuz dup 89 rx discard 'cuz mcast echo 219 rx discard mgt frames 6077 rx ctrl frames 552767 rx beacon frames 68 rx element too small 19471 rx element unknown 1334 rx frame chan mismatch 2 rx deauthentication 3 beacon miss events handled 95 rx w/ incorrect keyid 1 rx seq# violation (TKIP) 5 tx failed 'cuz no defkey 26 active scans started 90 rx frame with bogus beacon interval 555341 rx management frames 31 rx action frames 3393186 A-MPDU frames held in reorder q 3 A-MPDU BAR rx out of BA window 5797 A-MPDU BAR rx moved BA window 6077 A-MPDU BAR rx successful 286 A-MPDU frame moved BA window 3639694 A-MPDU frames rx out-of-order 3676659 A-MPDU rx window slots copied 54297 A-MPDU frames discarded for out of range seqno 3 A-MPDU frames sent up due to old age 11 tx failed 'cuz vap not in RUN state 5014 total data frames received 2223 unicast data frames received 2791 multicast data frames received 3113 total data frames transmit 3113 unicast data frames sent 121M current transmit rate 36 current rssi -96 current noise floor (dBm) -60 current signal (dBm) 4600 BAR frames sent 42 BAR frames retried
iwnstats is a tool which provides general and detailed statistics about physical layer, transmit (tx) and receive (rx) for the iwn(4) driver compatible cards.
The tool is in src/tools/tools/iwn/iwnstats/.