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WNM: Do not start scan on disassociation imminent if BSSID is set

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If the local network profile specifies a specific BSSID, there will not
be an acceptable alternative AP for the current one. As such, there is
not much point in trying to scan and wait for the results to make this
conclusion. Skip the scan and reject the BSS transition management
request even if that ends up getting disassociated from the BSS that
happens the be the only one that the local configuration allows to be
used.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2023-11-11 23:20:32 +02:00
parent b089803091
commit 9b89df7584
1 changed files with 13 additions and 1 deletions
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14
wpa_supplicant/wnm_sta.c
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@ -1517,7 +1517,8 @@ static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
"Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning &&
(!wpa_s->current_ssid || !wpa_s->current_ssid->bssid_set)) {
wpa_printf(MSG_DEBUG, "Trying to find another BSS");
wpa_supplicant_req_scan(wpa_s, 0, 0);
}
@ -1589,6 +1590,17 @@ static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
return;
}
if (wpa_s->current_ssid && wpa_s->current_ssid->bssid_set) {
wpa_printf(MSG_DEBUG,
"WNM: Configuration prevents roaming (BSSID set)");
wnm_send_bss_transition_mgmt_resp(
wpa_s, wpa_s->wnm_dialog_token,
WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES,
MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
NULL);
return;
}
wnm_sort_cand_list(wpa_s);
wnm_dump_cand_list(wpa_s);
valid_ms = valid_int * beacon_int * 128 / 125;