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| /freebsd-11-stable/sys/net80211/ | ||
| H A D | ieee80211_scan_sta.c | diff 343509 Mon Jan 28 01:19:11 MST 2019 avos MFC r343340: net80211: fix channel list construction for non-auto operating mode. Change the way how channel list mode <-> desired mode match is done: - Match channel list mode for next non-auto desired modes: * 11b: 11g, 11ng; * 11a: 11na - Add pre-defined channels only when one of the next conditions met: * the desired channel mode is 'auto' or * the desired channel and selected channel list modes are exactly the same or * the previous rule (11g / 11n promotion) applies. Before r275875 construction work properly for all except 11ng / 11na modes - these were broken at all (i.e., the scan list was empty); after r275875 all checks were removed, so scan table was populated by all device-compatible channels (desired mode was ignored). For example, if I will set 'ifconfig wlan0 mode 11ng' for RTL8821AU: - pre-r275875: nothing, scan will not work; - after r275875: both 11ng and 11na bands were scanned; also, since 11b channel list was used, 14th channel was scanned too. - after this change: only 11ng - 1-13 channels - are used for scanning. Note: since 11-stable does not have VHT mode definitions they were removed from this merge. |
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