The "ifconfig list scan" command does not work in adhoc mode if the channel was manually set with "ifconfig wlanX channel Y" It only works if the channel was not configured. How-To-Repeat: ifconfig wlan0 create wlandev ath0 wlanmode adhoc ifconfig wlan0 bssid 66:98:40:46:b7:0a up ifconfig wlan0 list scan SSID/MESH ID BSSID CHAN RATE S:N INT CAPS meraka 0a:02:6f:8b:b6:93 11 54M -91:-96 100 EPS WME RSN ATH CSIR Guest 06:02:6f:8b:b6:93 11 54M -90:-96 100 ES WME ATH ------------------------------------------------------------------ Now lock the channel, after that "list scan" gives no more output. ------------------------------------------------------------------ ifconfig wlan0 down ifconfig wlan0 channel 13 up ifconfig wlan0 list scan ------------------------------------------------------------------ Remove the channel selection and it works again ------------------------------------------------------------------ ifconfig wlan0 down ifconfig wlan0 channel - ifconfig wlan0 up mesh-2aee:~ # ifconfig wlan0 list scan SSID/MESH ID BSSID CHAN RATE S:N INT CAPS CSIR Wireless 00:02:6f:8b:b6:93 11 54M -89:-96 100 EPS WME RSN ATH CSIR Guest 06:02:6f:8b:b6:93 11 54M -90:-96 100 ES WME ATH
Responsible Changed From-To: freebsd-bugs->freebsd-wireless fix synopsis and assign
I found a way to get it to work with the channel that was manually set and I can get it to stop stop working again. ------------------------------------------------------------------ Configure adapter (no output): ------------------------------------------------------------------ mesh-284f:~ # ifconfig wlan0 channel 13 ssid test bssid 66:98:40:46:b7:0a up mesh-284f:~ # ifconfig wlan0 list scan ------------------------------------------------------------------ Get it to work: ------------------------------------------------------------------ mesh-284f:~ # ifconfig wlan0 channel -; ifconfig wlan0 channel 13 mesh-284f:~ # ifconfig wlan0 list scan SSID/MESH ID BSSID CHAN RATE S:N INT CAPS meraka 0a:02:6f:8b:b6:93 11 54M -86:-96 100 EPS WME RSN ATH CSIR Guest 06:02:6f:8b:b6:93 11 54M -86:-96 100 ES WME ATH CSIR Wireless 00:02:6f:8b:b6:93 11 54M -87:-96 100 EPS WME RSN ATH eduroam 0e:02:6f:8b:b6:93 11 54M -87:-96 100 EPS WME RSN ATH ------------------------------------------------------------------ Get it to stop working (no output): ------------------------------------------------------------------ mesh-284f:~ # ifconfig wlan0 down; ifconfig wlan0 up mesh-284f:~ # ifconfig wlan0 list scan
batch change: For bugs that match the following - Status Is In progress AND - Untouched since 2018-01-01. AND - Affects Base System OR Documentation DO: Reset to open status. Note: I did a quick pass but if you are getting this email it might be worthwhile to double check to see if this bug ought to be closed.
That's how it should work - see description of 'chanlist' and 'channel' ifconfig(8) parameters. Since the NIC is locked to the particular channel and there are no other wlans on this channel nearby the scan list is empty. The 'list scan' displays scan results that were cached from the previous scan; since 'ifconfig wlan0 channel -' removes limitations and new scan is triggered the cache will be non-empty - that's why the workaround 'works'.