WNM: Use recent scan results on BSS transition request
If the last scans are recent (for now, less than ten seconds old), use them instead of triggering a new scan when a BSS Transition Management Request frame is received. As a fallback, allow a new scan to be triggered if no matches were found. Signed-off-by: Jouni Malinen <j@w1.fi>
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parent
e1117c1c01
commit
75d65857d5
3 changed files with 24 additions and 5 deletions
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@ -1314,7 +1314,7 @@ static int _wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
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return 0;
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}
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if (wnm_scan_process(wpa_s) > 0)
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if (wnm_scan_process(wpa_s, 1) > 0)
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goto scan_work_done;
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if (sme_proc_obss_scan(wpa_s) > 0)
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@ -576,7 +576,7 @@ static void wnm_send_bss_transition_mgmt_resp(
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}
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int wnm_scan_process(struct wpa_supplicant *wpa_s)
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int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
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{
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struct wpa_bss *bss;
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struct wpa_ssid *ssid = wpa_s->current_ssid;
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@ -628,8 +628,12 @@ int wnm_scan_process(struct wpa_supplicant *wpa_s)
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wnm_deallocate_memory(wpa_s);
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return 1;
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/* Send reject response for all the failures */
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send_bss_resp_fail:
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if (!reply_on_fail)
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return 0;
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/* Send reject response for all the failures */
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if (wpa_s->wnm_reply) {
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wpa_s->wnm_reply = 0;
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wnm_send_bss_transition_mgmt_resp(wpa_s,
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@ -874,6 +878,20 @@ static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
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wpa_s->wnm_cand_valid_until.usec %= 1000000;
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os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
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if (wpa_s->last_scan_res_used > 0) {
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struct os_reltime now;
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os_get_reltime(&now);
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if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
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wpa_printf(MSG_DEBUG,
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"WNM: Try to use recent scan results");
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if (wnm_scan_process(wpa_s, 0) > 0)
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return;
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wpa_printf(MSG_DEBUG,
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"WNM: No match in previous scan results - try a new scan");
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}
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}
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wnm_set_scan_freqs(wpa_s);
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wpa_supplicant_req_scan(wpa_s, 0, 0);
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} else if (reply) {
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@ -62,11 +62,12 @@ void wnm_deallocate_memory(struct wpa_supplicant *wpa_s);
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#ifdef CONFIG_WNM
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int wnm_scan_process(struct wpa_supplicant *wpa_s);
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int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail);
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#else /* CONFIG_WNM */
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static inline int wnm_scan_process(struct wpa_supplicant *wpa_s)
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static inline int wnm_scan_process(struct wpa_supplicant *wpa_s,
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int reply_on_fail)
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{
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return 0;
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}
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