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P2P: Get cached scan results on iface creation to avoid scan

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This allows the P2P client to fast associate if the GO is already in the
scan cache without doing a full scan.

Signed-off-by: Matthew Wang <matthewmwang@chromium.org>
This commit is contained in:
Matthew Wang 2022-10-11 21:02:02 -07:00 committed by Jouni Malinen
parent 8392ea9e75
commit b72922796a
1 changed files with 22 additions and 0 deletions
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22
wpa_supplicant/p2p_supplicant.c
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@ -6875,6 +6875,8 @@ static int wpas_start_p2p_client(struct wpa_supplicant *wpa_s,
int freq, int force_scan)
{
struct wpa_ssid *ssid;
int other_iface_found = 0;
struct wpa_supplicant *ifs;
wpa_s = wpas_p2p_get_group_iface(wpa_s, addr_allocated, 0);
if (wpa_s == NULL)
@ -6919,6 +6921,26 @@ static int wpas_start_p2p_client(struct wpa_supplicant *wpa_s,
wpa_s->p2p_go_group_formation_completed = 0;
wpa_s->global->p2p_group_formation = wpa_s;
/*
* Get latest scan results from driver in case cached scan results from
* interfaces on the same wiphy allow us to skip the next scan by fast
* associating. Also update the scan time to the most recent scan result
* fetch time on the same radio so it reflects the actual time the last
* scan result event occurred.
*/
wpa_supplicant_update_scan_results(wpa_s);
dl_list_for_each(ifs, &wpa_s->radio->ifaces, struct wpa_supplicant,
radio_list) {
if (ifs == wpa_s)
continue;
if (!other_iface_found || os_reltime_before(&wpa_s->last_scan,
&ifs->last_scan)) {
other_iface_found = 1;
wpa_s->last_scan.sec = ifs->last_scan.sec;
wpa_s->last_scan.usec = ifs->last_scan.usec;
}
}
eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s->p2pdev,
NULL);
eloop_register_timeout(P2P_MAX_INITIAL_CONN_WAIT, 0,