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WNM: Scan for BSSID if there are forbidden neighbors

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The test to scan for a single BSSID assumed that there is only a single
neighbor in the candidate list. Also do this optimization if there are
multiple neighbors but only one of them is valid.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
This commit is contained in:
Benjamin Berg 2024-04-29 13:51:57 +02:00 committed by Jouni Malinen
parent 3cf4b4ad88
commit 9e50c12b31
1 changed files with 12 additions and 3 deletions
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15
wpa_supplicant/wnm_sta.c
View file

@ -1371,8 +1371,11 @@ static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
static int wnm_parse_candidate_list(struct wpa_supplicant *wpa_s,
const u8 *pos, const u8 *end)
const u8 *pos, const u8 *end,
int *num_valid_candidates)
{
*num_valid_candidates = 0;
while (end - pos >= 2 &&
wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT) {
u8 tag = *pos++;
@ -1402,6 +1405,9 @@ static int wnm_parse_candidate_list(struct wpa_supplicant *wpa_s,
ether_addr_equal(rep->bssid, wpa_s->bssid))
rep->disassoc_imminent = 1;
if (rep->preference_present && rep->preference)
*num_valid_candidates += 1;
wpa_s->wnm_num_neighbor_report++;
#ifdef CONFIG_MBO
if (wpa_s->wnm_mbo_trans_reason_present &&
@ -1431,6 +1437,7 @@ static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
const u8 *vendor;
#endif /* CONFIG_MBO */
bool disassoc_imminent;
int num_valid_candidates;
if (wpa_s->disable_mbo_oce || wpa_s->conf->disable_btm)
return;
@ -1564,7 +1571,8 @@ static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
wpas_mbo_ie_trans_req(wpa_s, vendor + 2, vendor[1]);
#endif /* CONFIG_MBO */
if (wnm_parse_candidate_list(wpa_s, pos, end) < 0)
if (wnm_parse_candidate_list(wpa_s, pos, end,
&num_valid_candidates) < 0)
goto reset;
if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
@ -1645,7 +1653,8 @@ static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
}
wnm_set_scan_freqs(wpa_s);
if (wpa_s->wnm_num_neighbor_report == 1) {
if (num_valid_candidates == 1) {
/* Any invalid candidate was sorted to the end */
os_memcpy(wpa_s->next_scan_bssid,
wpa_s->wnm_neighbor_report_elements[0].bssid,
ETH_ALEN);