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STA OBSS: Add check for overlapping BSSs

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In the previous implementation connected STA performs OBSS scan
according to requests from its 20/40 MHz AP. However STA checks only 40
MHz intolerance subfield from HT Capabilities element in scan results.
Meanwhile, as per IEEE Std 802.11-2016, 11.16.12, STA should check
overlapping BSSs as well.

Note that all the required code to check overlapping BSSs did already
exist for AP mode since AP does those checks properly before operating
as 20/40 MHz BSS in the 2.4 GHz band. Use that existing code by replace
existing 40 MHz intolerance check in sme_proc_obss_scan() with the new
shared helper function check_bss_coex_40mhz().

Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
This commit is contained in:
Sergey Matyukevich 2019-03-19 12:35:56 +00:00 • committed by Jouni Malinen
parent 3af78a4e04
commit 3204795d7a
3 changed files with 34 additions and 16 deletions
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6
wpa_supplicant/sme.h
View file

@ -37,7 +37,8 @@ void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s);
void sme_deinit(struct wpa_supplicant *wpa_s);
int sme_proc_obss_scan(struct wpa_supplicant *wpa_s);
int sme_proc_obss_scan(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *scan_res);
void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable);
void sme_external_auth_trigger(struct wpa_supplicant *wpa_s,
union wpa_event_data *data);
@ -112,7 +113,8 @@ static inline void sme_deinit(struct wpa_supplicant *wpa_s)
{
}
static inline int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
static inline int sme_proc_obss_scan(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *scan_res)
{
return 0;
}