static struct wpa_bss *
wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *scan_res,
struct wpa_ssid **selected_ssid)
{
struct wpa_bss *selected = NULL;
int prio;
while (selected == NULL) {
for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
selected = wpa_supplicant_select_bss(
wpa_s, scan_res, wpa_s->conf->pssid[prio],
selected_ssid);
if (selected)
break;
}
if (selected == NULL && wpa_s->blacklist) {
wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
"and try again");
wpa_blacklist_clear(wpa_s);
wpa_s->blacklist_cleared++;
} else if (selected == NULL)
break;
}
return selected;
}
static void
wpa_supplicant_scan_results(struct wpa_supplicant *wpa_s)
{
dladm_wlan_ess_t results[MAX_SCANRESULTS];
int num;
dladm_wlan_ess_t *selected = NULL;
struct wpa_ssid *ssid;
(void) memset(results, 0, sizeof (dladm_wlan_ess_t) * MAX_SCANRESULTS);
num = wpa_s->driver->get_scan_results(wpa_s->linkid, results,
MAX_SCANRESULTS);
wpa_printf(MSG_DEBUG, "Scan results: %d", num);
if (num < 0)
return;
if (num > MAX_SCANRESULTS) {
wpa_printf(MSG_INFO, "Not enough room for all APs (%d < %d)",
num, MAX_SCANRESULTS);
num = MAX_SCANRESULTS;
}
selected = wpa_supplicant_select_bss(wpa_s,
wpa_s->conf->ssid, results, num, &ssid);
if (selected) {
if (wpa_s->reassociate ||
memcmp(selected->we_bssid.wb_bytes, wpa_s->bssid,
IEEE80211_ADDR_LEN) != 0) {
wpa_supplicant_associate(wpa_s, selected, ssid);
} else {
wpa_printf(MSG_DEBUG, "Already associated with the "
"selected AP.");
}
} else {
wpa_printf(MSG_DEBUG, "No suitable AP found.");
wpa_supplicant_req_scan(wpa_s, 5, 0); /* wait 5 seconds */
}
}
static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
{
int prio, timeout;
struct wpa_scan_res *selected = NULL;
struct wpa_ssid *ssid = NULL;
wpa_supplicant_notify_scanning(wpa_s, 0);
if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
if (wpa_s->conf->ap_scan == 2)
return;
wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
"scanning again");
timeout = 1;
goto req_scan;
}
/*
* Don't post the results if this was the initial cached
* and there were no results.
*/
if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
wpa_s->scan_res->num == 0) {
wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
"empty - not posting");
} else {
wpa_printf(MSG_DEBUG, "New scan results available");
wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
wpa_supplicant_dbus_notify_scan_results(wpa_s);
wpas_wps_notify_scan_results(wpa_s);
}
if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)))
return;
if (wpa_s->disconnected) {
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
return;
}
while (selected == NULL) {
for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
selected = wpa_supplicant_select_bss(
wpa_s, wpa_s->conf->pssid[prio], &ssid);
if (selected)
break;
}
if (selected == NULL && wpa_s->blacklist) {
wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
"and try again");
wpa_blacklist_clear(wpa_s);
wpa_s->blacklist_cleared++;
} else if (selected == NULL) {
break;
}
}
if (selected) {
if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
"PBC session overlap");
timeout = 10;
goto req_scan;
}
/* Do not trigger new association unless the BSSID has changed
* or if reassociation is requested. If we are in process of
* associating with the selected BSSID, do not trigger new
* attempt. */
if (wpa_s->reassociate ||
(os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
(wpa_s->wpa_state != WPA_ASSOCIATING ||
os_memcmp(selected->bssid, wpa_s->pending_bssid,
ETH_ALEN) != 0))) {
if (wpa_supplicant_scard_init(wpa_s, ssid)) {
wpa_supplicant_req_scan(wpa_s, 10, 0);
return;
}
wpa_supplicant_associate(wpa_s, selected, ssid);
} else {
wpa_printf(MSG_DEBUG, "Already associated with the "
"selected AP.");
}
rsn_preauth_scan_results(wpa_s->wpa, wpa_s->scan_res);
} else {
wpa_printf(MSG_DEBUG, "No suitable AP found.");
timeout = 5;
goto req_scan;
}
return;
req_scan:
if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
/*
* Quick recovery if the initial scan results were not
* complete when fetched before the first scan request.
*/
wpa_s->scan_res_tried++;
timeout = 0;
} else if (!wpa_supplicant_enabled_networks(wpa_s->conf)) {
/*
* No networks are enabled; short-circuit request so
* we don't wait timeout seconds before transitioning
* to INACTIVE state.
*/
wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
return;
}
wpa_supplicant_req_scan(wpa_s, timeout, 0);
}
static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
{
int num, prio, timeout;
struct wpa_scan_result *selected = NULL;
struct wpa_ssid *ssid = NULL;
struct wpa_scan_result *results;
if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
if (wpa_s->conf->ap_scan == 2)
return;
wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
"scanning again");
timeout = 1;
goto req_scan;
}
wpa_supplicant_dbus_notify_scan_results(wpa_s);
if (wpa_s->conf->ap_scan == 2)
return;
results = wpa_s->scan_results;
num = wpa_s->num_scan_results;
while (selected == NULL) {
for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
selected = wpa_supplicant_select_bss(
wpa_s, wpa_s->conf->pssid[prio], results, num,
&ssid);
if (selected)
break;
}
if (selected == NULL && wpa_s->blacklist) {
wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
"and try again");
wpa_blacklist_clear(wpa_s);
} else if (selected == NULL) {
break;
}
}
if (selected) {
/* Do not trigger new association unless the BSSID has changed
* or if reassociation is requested. If we are in process of
* associating with the selected BSSID, do not trigger new
* attempt. */
if (wpa_s->reassociate ||
(os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
(wpa_s->wpa_state != WPA_ASSOCIATING ||
os_memcmp(selected->bssid, wpa_s->pending_bssid,
ETH_ALEN) != 0))) {
if (wpa_supplicant_scard_init(wpa_s, ssid)) {
wpa_supplicant_req_scan(wpa_s, 10, 0);
return;
}
wpa_supplicant_associate(wpa_s, selected, ssid);
} else {
wpa_printf(MSG_DEBUG, "Already associated with the "
"selected AP.");
}
rsn_preauth_scan_results(wpa_s->wpa, results, num);
} else {
wpa_printf(MSG_DEBUG, "No suitable AP found.");
timeout = 5;
goto req_scan;
}
return;
req_scan:
if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
/*
* Quick recovery if the initial scan results were not
* complete when fetched before the first scan request.
*/
wpa_s->scan_res_tried++;
timeout = 0;
}
wpa_supplicant_req_scan(wpa_s, timeout, 0);
}