/*
* WPA Supplicant - Scanning
- * Copyright (c) 2003-2012, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2003-2014, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
#include "hs20_supplicant.h"
#include "notify.h"
#include "bss.h"
-#include "gas_query.h"
#include "scan.h"
+#include "mesh.h"
static void wpa_supplicant_gen_assoc_event(struct wpa_supplicant *wpa_s)
if (wpa_s->current_ssid == NULL) {
wpa_s->current_ssid = ssid;
- if (wpa_s->current_ssid != NULL)
- wpas_notify_network_changed(wpa_s);
+ wpas_notify_network_changed(wpa_s);
}
wpa_supplicant_initiate_eapol(wpa_s);
wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with a configured "
wps = 1;
*req_type = wpas_wps_get_req_type(ssid);
- if (!ssid->eap.phase1)
- continue;
-
- if (os_strstr(ssid->eap.phase1, "pbc=1"))
+ if (ssid->eap.phase1 && os_strstr(ssid->eap.phase1, "pbc=1"))
return 2;
}
{
struct wpa_ssid *ssid = wpa_s->conf->ssid;
int count = 0, disabled = 0;
+
+ if (wpa_s->p2p_mgmt)
+ return 0; /* no normal network profiles on p2p_mgmt interface */
+
while (ssid) {
if (!wpas_network_disabled(wpa_s, ssid))
count++;
}
+static void wpas_trigger_scan_cb(struct wpa_radio_work *work, int deinit)
+{
+ struct wpa_supplicant *wpa_s = work->wpa_s;
+ struct wpa_driver_scan_params *params = work->ctx;
+ int ret;
+
+ if (deinit) {
+ if (!work->started) {
+ wpa_scan_free_params(params);
+ return;
+ }
+ wpa_supplicant_notify_scanning(wpa_s, 0);
+ wpas_notify_scan_done(wpa_s, 0);
+ wpa_s->scan_work = NULL;
+ return;
+ }
+
+ if (wpas_update_random_addr_disassoc(wpa_s) < 0) {
+ wpa_msg(wpa_s, MSG_INFO,
+ "Failed to assign random MAC address for a scan");
+ wpa_scan_free_params(params);
+ wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=-1");
+ radio_work_done(work);
+ return;
+ }
+
+ wpa_supplicant_notify_scanning(wpa_s, 1);
+
+ if (wpa_s->clear_driver_scan_cache) {
+ wpa_printf(MSG_DEBUG,
+ "Request driver to clear scan cache due to local BSS flush");
+ params->only_new_results = 1;
+ }
+ ret = wpa_drv_scan(wpa_s, params);
+ /*
+ * Store the obtained vendor scan cookie (if any) in wpa_s context.
+ * The current design is to allow only one scan request on each
+ * interface, hence having this scan cookie stored in wpa_s context is
+ * fine for now.
+ *
+ * Revisit this logic if concurrent scan operations per interface
+ * is supported.
+ */
+ if (ret == 0)
+ wpa_s->curr_scan_cookie = params->scan_cookie;
+ wpa_scan_free_params(params);
+ work->ctx = NULL;
+ if (ret) {
+ int retry = wpa_s->last_scan_req != MANUAL_SCAN_REQ;
+
+ if (wpa_s->disconnected)
+ retry = 0;
+
+ wpa_supplicant_notify_scanning(wpa_s, 0);
+ wpas_notify_scan_done(wpa_s, 0);
+ if (wpa_s->wpa_state == WPA_SCANNING)
+ wpa_supplicant_set_state(wpa_s,
+ wpa_s->scan_prev_wpa_state);
+ wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=%d%s",
+ ret, retry ? " retry=1" : "");
+ radio_work_done(work);
+
+ if (retry) {
+ /* Restore scan_req since we will try to scan again */
+ wpa_s->scan_req = wpa_s->last_scan_req;
+ wpa_supplicant_req_scan(wpa_s, 1, 0);
+ }
+ return;
+ }
+
+ os_get_reltime(&wpa_s->scan_trigger_time);
+ wpa_s->scan_runs++;
+ wpa_s->normal_scans++;
+ wpa_s->own_scan_requested = 1;
+ wpa_s->clear_driver_scan_cache = 0;
+ wpa_s->scan_work = work;
+}
+
+
/**
* wpa_supplicant_trigger_scan - Request driver to start a scan
* @wpa_s: Pointer to wpa_supplicant data
int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s,
struct wpa_driver_scan_params *params)
{
- int ret;
+ struct wpa_driver_scan_params *ctx;
- wpa_supplicant_notify_scanning(wpa_s, 1);
+ if (wpa_s->scan_work) {
+ wpa_dbg(wpa_s, MSG_INFO, "Reject scan trigger since one is already pending");
+ return -1;
+ }
- ret = wpa_drv_scan(wpa_s, params);
- if (ret) {
- wpa_supplicant_notify_scanning(wpa_s, 0);
- wpas_notify_scan_done(wpa_s, 0);
- } else {
- os_get_reltime(&wpa_s->scan_trigger_time);
- wpa_s->scan_runs++;
- wpa_s->normal_scans++;
- wpa_s->own_scan_requested = 1;
+ ctx = wpa_scan_clone_params(params);
+ if (!ctx ||
+ radio_add_work(wpa_s, 0, "scan", 0, wpas_trigger_scan_cb, ctx) < 0)
+ {
+ wpa_scan_free_params(ctx);
+ wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=-1");
+ return -1;
}
- return ret;
+ return 0;
}
}
-int wpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s,
- struct wpa_driver_scan_params *params,
- int interval)
+static int
+wpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s,
+ struct wpa_driver_scan_params *params)
{
int ret;
wpa_supplicant_notify_scanning(wpa_s, 1);
- ret = wpa_drv_sched_scan(wpa_s, params, interval * 1000);
+ ret = wpa_drv_sched_scan(wpa_s, params);
if (ret)
wpa_supplicant_notify_scanning(wpa_s, 0);
else
}
-int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s)
+static int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s)
{
int ret;
}
if (count == 0)
return NULL;
- ssids = os_zalloc(count * sizeof(struct wpa_driver_scan_filter));
+ ssids = os_calloc(count, sizeof(struct wpa_driver_scan_filter));
if (ssids == NULL)
return NULL;
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO "
"preferred frequency %d MHz",
wpa_s->go_params->freq);
- params->freqs = os_zalloc(2 * sizeof(int));
+ params->freqs = os_calloc(2, sizeof(int));
if (params->freqs)
params->freqs[0] = wpa_s->go_params->freq;
} else if (wpa_s->p2p_in_provisioning < 8 &&
}
wpa_s->p2p_in_provisioning++;
}
+
+ if (params->freqs == NULL && wpa_s->p2p_in_invitation) {
+ /*
+ * Optimize scan based on GO information during persistent
+ * group reinvocation
+ */
+ if (wpa_s->p2p_in_invitation < 5 &&
+ wpa_s->p2p_invite_go_freq > 0) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO preferred frequency %d MHz during invitation",
+ wpa_s->p2p_invite_go_freq);
+ params->freqs = os_calloc(2, sizeof(int));
+ if (params->freqs)
+ params->freqs[0] = wpa_s->p2p_invite_go_freq;
+ }
+ wpa_s->p2p_in_invitation++;
+ if (wpa_s->p2p_in_invitation > 20) {
+ /*
+ * This should not really happen since the variable is
+ * cleared on group removal, but if it does happen, make
+ * sure we do not get stuck in special invitation scan
+ * mode.
+ */
+ wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Clear p2p_in_invitation");
+ wpa_s->p2p_in_invitation = 0;
+ }
+ }
#endif /* CONFIG_P2P */
#ifdef CONFIG_WPS
*/
wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz "
"that was used during provisioning", wpa_s->wps_freq);
- params->freqs = os_zalloc(2 * sizeof(int));
+ params->freqs = os_calloc(2, sizeof(int));
if (params->freqs)
params->freqs[0] = wpa_s->wps_freq;
wpa_s->after_wps--;
/* Optimize provisioning scan based on already known channel */
wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz",
wpa_s->wps_freq);
- params->freqs = os_zalloc(2 * sizeof(int));
+ params->freqs = os_calloc(2, sizeof(int));
if (params->freqs)
params->freqs[0] = wpa_s->wps_freq;
wpa_s->known_wps_freq = 0; /* only do this once */
static void wpas_add_interworking_elements(struct wpa_supplicant *wpa_s,
struct wpabuf *buf)
{
- if (wpa_s->conf->interworking == 0)
- return;
-
- wpabuf_put_u8(buf, WLAN_EID_EXT_CAPAB);
- wpabuf_put_u8(buf, 4);
- wpabuf_put_u8(buf, 0x00);
- wpabuf_put_u8(buf, 0x00);
- wpabuf_put_u8(buf, 0x00);
- wpabuf_put_u8(buf, 0x80); /* Bit 31 - Interworking */
-
wpabuf_put_u8(buf, WLAN_EID_INTERWORKING);
wpabuf_put_u8(buf, is_zero_ether_addr(wpa_s->conf->hessid) ? 1 :
1 + ETH_ALEN);
#endif /* CONFIG_INTERWORKING */
+void wpa_supplicant_set_default_scan_ies(struct wpa_supplicant *wpa_s)
+{
+ struct wpabuf *default_ies = NULL;
+ u8 ext_capab[18];
+ int ext_capab_len;
+ enum wpa_driver_if_type type = WPA_IF_STATION;
+
+#ifdef CONFIG_P2P
+ if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT)
+ type = WPA_IF_P2P_CLIENT;
+#endif /* CONFIG_P2P */
+
+ wpa_drv_get_ext_capa(wpa_s, type);
+
+ ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
+ sizeof(ext_capab));
+ if (ext_capab_len > 0 &&
+ wpabuf_resize(&default_ies, ext_capab_len) == 0)
+ wpabuf_put_data(default_ies, ext_capab, ext_capab_len);
+
+#ifdef CONFIG_MBO
+ /* Send cellular capabilities for potential MBO STAs */
+ if (wpabuf_resize(&default_ies, 9) == 0)
+ wpas_mbo_scan_ie(wpa_s, default_ies);
+#endif /* CONFIG_MBO */
+
+ if (default_ies)
+ wpa_drv_set_default_scan_ies(wpa_s, wpabuf_head(default_ies),
+ wpabuf_len(default_ies));
+ wpabuf_free(default_ies);
+}
+
+
static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s)
{
struct wpabuf *extra_ie = NULL;
+ u8 ext_capab[18];
+ int ext_capab_len;
#ifdef CONFIG_WPS
int wps = 0;
enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO;
#endif /* CONFIG_WPS */
+#ifdef CONFIG_P2P
+ if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT)
+ wpa_drv_get_ext_capa(wpa_s, WPA_IF_P2P_CLIENT);
+ else
+#endif /* CONFIG_P2P */
+ wpa_drv_get_ext_capa(wpa_s, WPA_IF_STATION);
+
+ ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
+ sizeof(ext_capab));
+ if (ext_capab_len > 0 &&
+ wpabuf_resize(&extra_ie, ext_capab_len) == 0)
+ wpabuf_put_data(extra_ie, ext_capab, ext_capab_len);
+
#ifdef CONFIG_INTERWORKING
if (wpa_s->conf->interworking &&
wpabuf_resize(&extra_ie, 100) == 0)
}
#endif /* CONFIG_P2P */
+ wpa_supplicant_mesh_add_scan_ie(wpa_s, &extra_ie);
+
#endif /* CONFIG_WPS */
#ifdef CONFIG_HS20
if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 7) == 0)
- wpas_hs20_add_indication(extra_ie);
+ wpas_hs20_add_indication(extra_ie, -1);
#endif /* CONFIG_HS20 */
+#ifdef CONFIG_FST
+ if (wpa_s->fst_ies &&
+ wpabuf_resize(&extra_ie, wpabuf_len(wpa_s->fst_ies)) == 0)
+ wpabuf_put_buf(extra_ie, wpa_s->fst_ies);
+#endif /* CONFIG_FST */
+
+#ifdef CONFIG_MBO
+ /* Send cellular capabilities for potential MBO STAs */
+ if (wpabuf_resize(&extra_ie, 9) == 0)
+ wpas_mbo_scan_ie(wpa_s, extra_ie);
+#endif /* CONFIG_MBO */
+
+ if (wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ]) {
+ struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ];
+
+ if (wpabuf_resize(&extra_ie, wpabuf_len(buf)) == 0)
+ wpabuf_put_buf(extra_ie, buf);
+ }
+
return extra_ie;
}
#endif /* CONFIG_P2P */
-static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
- u16 num_modes,
- enum hostapd_hw_mode mode)
-{
- u16 i;
-
- for (i = 0; i < num_modes; i++) {
- if (modes[i].mode == mode)
- return &modes[i];
- }
-
- return NULL;
-}
-
-
static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
enum hostapd_hw_mode band,
struct wpa_driver_scan_params *params)
return;
}
- params->freqs = os_zalloc((mode->num_channels + 1) * sizeof(int));
+ params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
if (params->freqs == NULL)
return;
for (count = 0, i = 0; i < mode->num_channels; i++) {
}
+static void wpa_set_scan_ssids(struct wpa_supplicant *wpa_s,
+ struct wpa_driver_scan_params *params,
+ size_t max_ssids)
+{
+ unsigned int i;
+ struct wpa_ssid *ssid;
+
+ /*
+ * For devices with max_ssids greater than 1, leave the last slot empty
+ * for adding the wildcard scan entry.
+ */
+ max_ssids = max_ssids > 1 ? max_ssids - 1 : max_ssids;
+
+ for (i = 0; i < wpa_s->scan_id_count; i++) {
+ unsigned int j;
+
+ ssid = wpa_config_get_network(wpa_s->conf, wpa_s->scan_id[i]);
+ if (!ssid || !ssid->scan_ssid)
+ continue;
+
+ for (j = 0; j < params->num_ssids; j++) {
+ if (params->ssids[j].ssid_len == ssid->ssid_len &&
+ params->ssids[j].ssid &&
+ os_memcmp(params->ssids[j].ssid, ssid->ssid,
+ ssid->ssid_len) == 0)
+ break;
+ }
+ if (j < params->num_ssids)
+ continue; /* already in the list */
+
+ if (params->num_ssids + 1 > max_ssids) {
+ wpa_printf(MSG_DEBUG,
+ "Over max scan SSIDs for manual request");
+ break;
+ }
+
+ wpa_printf(MSG_DEBUG, "Scan SSID (manual request): %s",
+ wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
+ params->ssids[params->num_ssids].ssid = ssid->ssid;
+ params->ssids[params->num_ssids].ssid_len = ssid->ssid_len;
+ params->num_ssids++;
+ }
+
+ wpa_s->scan_id_count = 0;
+}
+
+
+static int wpa_set_ssids_from_scan_req(struct wpa_supplicant *wpa_s,
+ struct wpa_driver_scan_params *params,
+ size_t max_ssids)
+{
+ unsigned int i;
+
+ if (wpa_s->ssids_from_scan_req == NULL ||
+ wpa_s->num_ssids_from_scan_req == 0)
+ return 0;
+
+ if (wpa_s->num_ssids_from_scan_req > max_ssids) {
+ wpa_s->num_ssids_from_scan_req = max_ssids;
+ wpa_printf(MSG_DEBUG, "Over max scan SSIDs from scan req: %u",
+ (unsigned int) max_ssids);
+ }
+
+ for (i = 0; i < wpa_s->num_ssids_from_scan_req; i++) {
+ params->ssids[i].ssid = wpa_s->ssids_from_scan_req[i].ssid;
+ params->ssids[i].ssid_len =
+ wpa_s->ssids_from_scan_req[i].ssid_len;
+ wpa_hexdump_ascii(MSG_DEBUG, "specific SSID",
+ params->ssids[i].ssid,
+ params->ssids[i].ssid_len);
+ }
+
+ params->num_ssids = wpa_s->num_ssids_from_scan_req;
+ wpa_s->num_ssids_from_scan_req = 0;
+ return 1;
+}
+
+
static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
struct wpa_ssid *ssid;
- int ret;
+ int ret, p2p_in_prog;
struct wpabuf *extra_ie = NULL;
struct wpa_driver_scan_params params;
struct wpa_driver_scan_params *scan_params;
size_t max_ssids;
- enum wpa_states prev_state;
+ int connect_without_scan = 0;
+
+ wpa_s->ignore_post_flush_scan_res = 0;
if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled");
- wpas_p2p_continue_after_scan(wpa_s);
return;
}
if (wpa_s->disconnected && wpa_s->scan_req == NORMAL_SCAN_REQ) {
wpa_dbg(wpa_s, MSG_DEBUG, "Disconnected - do not scan");
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
- wpas_p2p_continue_after_scan(wpa_s);
return;
}
return;
}
- if (wpa_s->external_scan_running) {
- struct os_reltime now, diff;
- os_get_reltime(&now);
- os_reltime_sub(&now, &wpa_s->scan_start_time, &diff);
- if (diff.sec < 30) {
- wpa_dbg(wpa_s, MSG_DEBUG, "Externally triggered scan running - Reschedule the incoming scan req");
- wpa_supplicant_req_scan(wpa_s, 1, 0);
- return;
- }
- }
-
if (!wpa_supplicant_enabled_networks(wpa_s) &&
wpa_s->scan_req == NORMAL_SCAN_REQ) {
wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan");
wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
- wpas_p2p_continue_after_scan(wpa_s);
return;
}
return;
}
-#ifdef CONFIG_P2P
- if (wpas_p2p_in_progress(wpa_s) || wpas_wpa_is_in_progress(wpa_s, 0)) {
- if (wpa_s->sta_scan_pending &&
- wpas_p2p_in_progress(wpa_s) == 2 &&
- wpa_s->global->p2p_cb_on_scan_complete) {
- wpa_dbg(wpa_s, MSG_DEBUG, "Process pending station "
- "mode scan during P2P search");
- } else {
- wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan "
- "while P2P operation is in progress");
- wpa_s->sta_scan_pending = 1;
- wpa_supplicant_req_scan(wpa_s, 5, 0);
- return;
+ ssid = NULL;
+ if (wpa_s->scan_req != MANUAL_SCAN_REQ &&
+ wpa_s->connect_without_scan) {
+ connect_without_scan = 1;
+ for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
+ if (ssid == wpa_s->connect_without_scan)
+ break;
}
}
-#endif /* CONFIG_P2P */
-#ifdef CONFIG_GAS
- if (gas_query_in_progress(wpa_s->gas)) {
- wpa_dbg(wpa_s, MSG_DEBUG, "Delay scan while GAS query is in progress");
- wpa_supplicant_req_scan(wpa_s, 1, 0);
+ p2p_in_prog = wpas_p2p_in_progress(wpa_s);
+ if (p2p_in_prog && p2p_in_prog != 2 &&
+ (!ssid ||
+ (ssid->mode != WPAS_MODE_AP && ssid->mode != WPAS_MODE_P2P_GO))) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan while P2P operation is in progress");
+ wpa_supplicant_req_scan(wpa_s, 5, 0);
+ return;
+ }
+
+ /*
+ * Don't cancel the scan based on ongoing PNO; defer it. Some scans are
+ * used for changing modes inside wpa_supplicant (roaming,
+ * auto-reconnect, etc). Discarding the scan might hurt these processes.
+ * The normal use case for PNO is to suspend the host immediately after
+ * starting PNO, so the periodic 100 ms attempts to run the scan do not
+ * normally happen in practice multiple times, i.e., this is simply
+ * restarting scanning once the host is woken up and PNO stopped.
+ */
+ if (wpa_s->pno || wpa_s->pno_sched_pending) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "Defer scan - PNO is in progress");
+ wpa_supplicant_req_scan(wpa_s, 0, 100000);
return;
}
-#endif /* CONFIG_GAS */
if (wpa_s->conf->ap_scan == 2)
max_ssids = 1;
wpa_s->last_scan_req = wpa_s->scan_req;
wpa_s->scan_req = NORMAL_SCAN_REQ;
+ if (connect_without_scan) {
+ wpa_s->connect_without_scan = NULL;
+ if (ssid) {
+ wpa_printf(MSG_DEBUG, "Start a pre-selected network "
+ "without scan step");
+ wpa_supplicant_associate(wpa_s, NULL, ssid);
+ return;
+ }
+ }
+
os_memset(¶ms, 0, sizeof(params));
- prev_state = wpa_s->wpa_state;
+ wpa_s->scan_prev_wpa_state = wpa_s->wpa_state;
if (wpa_s->wpa_state == WPA_DISCONNECTED ||
wpa_s->wpa_state == WPA_INACTIVE)
wpa_supplicant_set_state(wpa_s, WPA_SCANNING);
goto scan;
}
- if (wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
- wpa_s->connect_without_scan) {
- for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
- if (ssid == wpa_s->connect_without_scan)
- break;
- }
- wpa_s->connect_without_scan = NULL;
- if (ssid) {
- wpa_printf(MSG_DEBUG, "Start a pre-selected network "
- "without scan step");
- wpa_supplicant_associate(wpa_s, NULL, ssid);
- return;
- }
+ if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
+ wpa_set_ssids_from_scan_req(wpa_s, ¶ms, max_ssids)) {
+ wpa_printf(MSG_DEBUG, "Use specific SSIDs from SCAN command");
+ goto ssid_list_set;
}
#ifdef CONFIG_P2P
if ((wpa_s->p2p_in_provisioning || wpa_s->show_group_started) &&
- wpa_s->go_params) {
+ wpa_s->go_params && !wpa_s->conf->passive_scan) {
wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisioning=%d show_group_started=%d)",
wpa_s->p2p_in_provisioning,
wpa_s->show_group_started);
params.num_ssids = 1;
goto ssid_list_set;
}
+
+ if (wpa_s->p2p_in_invitation) {
+ if (wpa_s->current_ssid) {
+ wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during invitation");
+ params.ssids[0].ssid = wpa_s->current_ssid->ssid;
+ params.ssids[0].ssid_len =
+ wpa_s->current_ssid->ssid_len;
+ params.num_ssids = 1;
+ } else {
+ wpa_printf(MSG_DEBUG, "P2P: No specific SSID known for scan during invitation");
+ }
+ goto ssid_list_set;
+ }
#endif /* CONFIG_P2P */
/* Find the starting point from which to continue scanning */
}
if (wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
+#ifdef CONFIG_AP
+ !wpa_s->ap_iface &&
+#endif /* CONFIG_AP */
wpa_s->conf->ap_scan == 2) {
wpa_s->connect_without_scan = NULL;
wpa_s->prev_scan_wildcard = 0;
* wildcard SSID.
*/
ssid = NULL;
+ } else if (wpa_s->reattach && wpa_s->current_ssid != NULL) {
+ /*
+ * Perform single-channel single-SSID scan for
+ * reassociate-to-same-BSS operation.
+ */
+ /* Setup SSID */
+ ssid = wpa_s->current_ssid;
+ wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",
+ ssid->ssid, ssid->ssid_len);
+ params.ssids[0].ssid = ssid->ssid;
+ params.ssids[0].ssid_len = ssid->ssid_len;
+ params.num_ssids = 1;
+
+ /*
+ * Allocate memory for frequency array, allocate one extra
+ * slot for the zero-terminator.
+ */
+ params.freqs = os_malloc(sizeof(int) * 2);
+ if (params.freqs) {
+ params.freqs[0] = wpa_s->assoc_freq;
+ params.freqs[1] = 0;
+ }
+
+ /*
+ * Reset the reattach flag so that we fall back to full scan if
+ * this scan fails.
+ */
+ wpa_s->reattach = 0;
} else {
struct wpa_ssid *start = ssid, *tssid;
int freqs_set = 0;
ssid = wpa_s->conf->ssid;
}
- for (tssid = wpa_s->conf->ssid; tssid; tssid = tssid->next) {
+ if (wpa_s->scan_id_count &&
+ wpa_s->last_scan_req == MANUAL_SCAN_REQ)
+ wpa_set_scan_ssids(wpa_s, ¶ms, max_ssids);
+
+ for (tssid = wpa_s->conf->ssid;
+ wpa_s->last_scan_req != MANUAL_SCAN_REQ && tssid;
+ tssid = tssid->next) {
if (wpas_network_disabled(wpa_s, tssid))
continue;
if ((params.freqs || !freqs_set) && tssid->scan_freq) {
} else if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
wpa_s->manual_scan_passive && params.num_ssids == 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "Use passive scan based on manual request");
+ } else if (wpa_s->conf->passive_scan) {
+ wpa_dbg(wpa_s, MSG_DEBUG,
+ "Use passive scan based on configuration");
} else {
wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
params.num_ssids++;
wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard "
"SSID");
}
-#ifdef CONFIG_P2P
-ssid_list_set:
-#endif /* CONFIG_P2P */
+ssid_list_set:
wpa_supplicant_optimize_freqs(wpa_s, ¶ms);
extra_ie = wpa_supplicant_extra_ies(wpa_s);
+ if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
+ wpa_s->manual_scan_only_new) {
+ wpa_printf(MSG_DEBUG,
+ "Request driver to clear scan cache due to manual only_new=1 scan");
+ params.only_new_results = 1;
+ }
+
if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs == NULL &&
wpa_s->manual_scan_freqs) {
wpa_dbg(wpa_s, MSG_DEBUG, "Limit manual scan to specified channels");
wpa_s->manual_scan_freqs = NULL;
}
+ if (params.freqs == NULL && wpa_s->select_network_scan_freqs) {
+ wpa_dbg(wpa_s, MSG_DEBUG,
+ "Limit select_network scan to specified channels");
+ params.freqs = wpa_s->select_network_scan_freqs;
+ wpa_s->select_network_scan_freqs = NULL;
+ }
+
if (params.freqs == NULL && wpa_s->next_scan_freqs) {
wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously "
"generated frequency list");
}
#ifdef CONFIG_P2P
- if (wpa_s->p2p_in_provisioning ||
+ if (wpa_s->p2p_in_provisioning || wpa_s->p2p_in_invitation ||
(wpa_s->show_group_started && wpa_s->go_params)) {
/*
* The interface may not yet be in P2P mode, so we have to
}
#endif /* CONFIG_P2P */
+ if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCAN) &&
+ wpa_s->wpa_state <= WPA_SCANNING) {
+ params.mac_addr_rand = 1;
+ if (wpa_s->mac_addr_scan) {
+ params.mac_addr = wpa_s->mac_addr_scan;
+ params.mac_addr_mask = wpa_s->mac_addr_scan + ETH_ALEN;
+ }
+ }
+
+ if (!is_zero_ether_addr(wpa_s->next_scan_bssid)) {
+ struct wpa_bss *bss;
+
+ params.bssid = wpa_s->next_scan_bssid;
+ bss = wpa_bss_get_bssid_latest(wpa_s, params.bssid);
+ if (bss && bss->ssid_len && params.num_ssids == 1 &&
+ params.ssids[0].ssid_len == 0) {
+ params.ssids[0].ssid = bss->ssid;
+ params.ssids[0].ssid_len = bss->ssid_len;
+ wpa_dbg(wpa_s, MSG_DEBUG,
+ "Scan a previously specified BSSID " MACSTR
+ " and SSID %s",
+ MAC2STR(params.bssid),
+ wpa_ssid_txt(bss->ssid, bss->ssid_len));
+ } else {
+ wpa_dbg(wpa_s, MSG_DEBUG,
+ "Scan a previously specified BSSID " MACSTR,
+ MAC2STR(params.bssid));
+ }
+ }
+
scan_params = ¶ms;
scan:
if (ret) {
wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan");
- if (prev_state != wpa_s->wpa_state)
- wpa_supplicant_set_state(wpa_s, prev_state);
+ if (wpa_s->scan_prev_wpa_state != wpa_s->wpa_state)
+ wpa_supplicant_set_state(wpa_s,
+ wpa_s->scan_prev_wpa_state);
/* Restore scan_req since we will try to scan again */
wpa_s->scan_req = wpa_s->last_scan_req;
wpa_supplicant_req_scan(wpa_s, 1, 0);
} else {
wpa_s->scan_for_connection = 0;
+#ifdef CONFIG_INTERWORKING
+ wpa_s->interworking_fast_assoc_tried = 0;
+#endif /* CONFIG_INTERWORKING */
+ if (params.bssid)
+ os_memset(wpa_s->next_scan_bssid, 0, ETH_ALEN);
}
}
*/
void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec)
{
- if (eloop_deplete_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL))
- {
- wpa_dbg(wpa_s, MSG_DEBUG, "Rescheduling scan request: %d sec %d usec",
+ int res;
+
+ if (wpa_s->p2p_mgmt) {
+ wpa_dbg(wpa_s, MSG_DEBUG,
+ "Ignore scan request (%d.%06d sec) on p2p_mgmt interface",
sec, usec);
return;
}
- wpa_dbg(wpa_s, MSG_DEBUG, "Setting scan request: %d sec %d usec",
- sec, usec);
- eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL);
- eloop_register_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL);
+ res = eloop_deplete_timeout(sec, usec, wpa_supplicant_scan, wpa_s,
+ NULL);
+ if (res == 1) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "Rescheduling scan request: %d.%06d sec",
+ sec, usec);
+ } else if (res == 0) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "Ignore new scan request for %d.%06d sec since an earlier request is scheduled to trigger sooner",
+ sec, usec);
+ } else {
+ wpa_dbg(wpa_s, MSG_DEBUG, "Setting scan request: %d.%06d sec",
+ sec, usec);
+ eloop_register_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL);
+ }
}
}
+static void
+wpa_scan_set_relative_rssi_params(struct wpa_supplicant *wpa_s,
+ struct wpa_driver_scan_params *params)
+{
+ if (wpa_s->wpa_state != WPA_COMPLETED ||
+ !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SCHED_SCAN_RELATIVE_RSSI) ||
+ wpa_s->srp.relative_rssi_set == 0)
+ return;
+
+ params->relative_rssi_set = 1;
+ params->relative_rssi = wpa_s->srp.relative_rssi;
+
+ if (wpa_s->srp.relative_adjust_rssi == 0)
+ return;
+
+ params->relative_adjust_band = wpa_s->srp.relative_adjust_band;
+ params->relative_adjust_rssi = wpa_s->srp.relative_adjust_rssi;
+}
+
+
/**
* wpa_supplicant_req_sched_scan - Start a periodic scheduled scan
* @wpa_s: Pointer to wpa_supplicant data
unsigned int max_sched_scan_ssids;
int wildcard = 0;
int need_ssids;
+ struct sched_scan_plan scan_plan;
if (!wpa_s->sched_scan_supported)
return -1;
if (max_sched_scan_ssids < 1 || wpa_s->conf->disable_scan_offload)
return -1;
+ wpa_s->sched_scan_stop_req = 0;
+
if (wpa_s->sched_scanning) {
wpa_dbg(wpa_s, MSG_DEBUG, "Already sched scanning");
return 0;
os_memset(¶ms, 0, sizeof(params));
/* If we can't allocate space for the filters, we just don't filter */
- params.filter_ssids = os_zalloc(wpa_s->max_match_sets *
+ params.filter_ssids = os_calloc(wpa_s->max_match_sets,
sizeof(struct wpa_driver_scan_filter));
prev_state = wpa_s->wpa_state;
if (!ssid || !wpa_s->prev_sched_ssid) {
wpa_dbg(wpa_s, MSG_DEBUG, "Beginning of SSID list");
- if (wpa_s->conf->sched_scan_interval)
- wpa_s->sched_scan_interval =
- wpa_s->conf->sched_scan_interval;
- if (wpa_s->sched_scan_interval == 0)
- wpa_s->sched_scan_interval = 10;
wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;
wpa_s->first_sched_scan = 1;
ssid = wpa_s->conf->ssid;
params.extra_ies_len = wpabuf_len(extra_ie);
}
+ if (wpa_s->conf->filter_rssi)
+ params.filter_rssi = wpa_s->conf->filter_rssi;
+
+ /* See if user specified frequencies. If so, scan only those. */
+ if (wpa_s->conf->freq_list && !params.freqs) {
+ wpa_dbg(wpa_s, MSG_DEBUG,
+ "Optimize scan based on conf->freq_list");
+ int_array_concat(¶ms.freqs, wpa_s->conf->freq_list);
+ }
+
scan_params = ¶ms;
scan:
- if (ssid || !wpa_s->first_sched_scan) {
+ wpa_s->sched_scan_timed_out = 0;
+
+ /*
+ * We cannot support multiple scan plans if the scan request includes
+ * too many SSID's, so in this case use only the last scan plan and make
+ * it run infinitely. It will be stopped by the timeout.
+ */
+ if (wpa_s->sched_scan_plans_num == 1 ||
+ (wpa_s->sched_scan_plans_num && !ssid && wpa_s->first_sched_scan)) {
+ params.sched_scan_plans = wpa_s->sched_scan_plans;
+ params.sched_scan_plans_num = wpa_s->sched_scan_plans_num;
+ } else if (wpa_s->sched_scan_plans_num > 1) {
wpa_dbg(wpa_s, MSG_DEBUG,
- "Starting sched scan: interval %d timeout %d",
- wpa_s->sched_scan_interval, wpa_s->sched_scan_timeout);
+ "Too many SSIDs. Default to using single scheduled_scan plan");
+ params.sched_scan_plans =
+ &wpa_s->sched_scan_plans[wpa_s->sched_scan_plans_num -
+ 1];
+ params.sched_scan_plans_num = 1;
} else {
+ if (wpa_s->conf->sched_scan_interval)
+ scan_plan.interval = wpa_s->conf->sched_scan_interval;
+ else
+ scan_plan.interval = 10;
+
+ if (scan_plan.interval > wpa_s->max_sched_scan_plan_interval) {
+ wpa_printf(MSG_WARNING,
+ "Scan interval too long(%u), use the maximum allowed(%u)",
+ scan_plan.interval,
+ wpa_s->max_sched_scan_plan_interval);
+ scan_plan.interval =
+ wpa_s->max_sched_scan_plan_interval;
+ }
+
+ scan_plan.iterations = 0;
+ params.sched_scan_plans = &scan_plan;
+ params.sched_scan_plans_num = 1;
+ }
+
+ if (ssid || !wpa_s->first_sched_scan) {
wpa_dbg(wpa_s, MSG_DEBUG,
- "Starting sched scan: interval %d (no timeout)",
- wpa_s->sched_scan_interval);
+ "Starting sched scan: interval %u timeout %d",
+ params.sched_scan_plans[0].interval,
+ wpa_s->sched_scan_timeout);
+ } else {
+ wpa_dbg(wpa_s, MSG_DEBUG, "Starting sched scan (no timeout)");
}
wpa_setband_scan_freqs(wpa_s, scan_params);
- ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params,
- wpa_s->sched_scan_interval);
+ if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCHED_SCAN) &&
+ wpa_s->wpa_state <= WPA_SCANNING) {
+ params.mac_addr_rand = 1;
+ if (wpa_s->mac_addr_sched_scan) {
+ params.mac_addr = wpa_s->mac_addr_sched_scan;
+ params.mac_addr_mask = wpa_s->mac_addr_sched_scan +
+ ETH_ALEN;
+ }
+ }
+
+ wpa_scan_set_relative_rssi_params(wpa_s, scan_params);
+
+ ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params);
wpabuf_free(extra_ie);
os_free(params.filter_ssids);
if (ret) {
wpa_s, NULL);
wpa_s->first_sched_scan = 0;
wpa_s->sched_scan_timeout /= 2;
- wpa_s->sched_scan_interval *= 2;
- if (wpa_s->sched_scan_timeout < wpa_s->sched_scan_interval) {
- wpa_s->sched_scan_interval = 10;
+ params.sched_scan_plans[0].interval *= 2;
+ if ((unsigned int) wpa_s->sched_scan_timeout <
+ params.sched_scan_plans[0].interval ||
+ params.sched_scan_plans[0].interval >
+ wpa_s->max_sched_scan_plan_interval) {
+ params.sched_scan_plans[0].interval = 10;
wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;
}
}
{
wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling scan request");
eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL);
- wpas_p2p_continue_after_scan(wpa_s);
}
if (!wpa_s->sched_scanning)
return;
+ if (wpa_s->sched_scanning)
+ wpa_s->sched_scan_stop_req = 1;
+
wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling sched scan");
eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout, wpa_s, NULL);
wpa_supplicant_stop_sched_scan(wpa_s);
*/
const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie)
{
- const u8 *end, *pos;
-
- pos = (const u8 *) (res + 1);
- end = pos + res->ie_len;
+ size_t ie_len = res->ie_len;
- while (pos + 1 < end) {
- if (pos + 2 + pos[1] > end)
- break;
- if (pos[0] == ie)
- return pos;
- pos += 2 + pos[1];
- }
+ /* Use the Beacon frame IEs if res->ie_len is not available */
+ if (!ie_len)
+ ie_len = res->beacon_ie_len;
- return NULL;
+ return get_ie((const u8 *) (res + 1), ie_len, ie);
}
pos = (const u8 *) (res + 1);
end = pos + res->ie_len;
- while (pos + 1 < end) {
- if (pos + 2 + pos[1] > end)
+ while (end - pos > 1) {
+ if (2 + pos[1] > end - pos)
break;
if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
vendor_type == WPA_GET_BE32(&pos[2]))
pos += res->ie_len;
end = pos + res->beacon_ie_len;
- while (pos + 1 < end) {
- if (pos + 2 + pos[1] > end)
+ while (end - pos > 1) {
+ if (2 + pos[1] > end - pos)
break;
if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
vendor_type == WPA_GET_BE32(&pos[2]))
pos = (const u8 *) (res + 1);
end = pos + res->ie_len;
- while (pos + 1 < end) {
- if (pos + 2 + pos[1] > end)
+ while (end - pos > 1) {
+ if (2 + pos[1] > end - pos)
break;
if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
vendor_type == WPA_GET_BE32(&pos[2]))
* This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general
* rule of thumb is that any SNR above 20 is good." This one
* http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#qa23
- * recommends 25 as a minimum SNR for 54 Mbps data rate. 30 is chosen here as a
- * conservative value.
+ * recommends 25 as a minimum SNR for 54 Mbps data rate. The estimates used in
+ * scan_est_throughput() allow even smaller SNR values for the maximum rates
+ * (21 for 54 Mbps, 22 for VHT80 MCS9, 24 for HT40 and HT20 MCS7). Use 25 as a
+ * somewhat conservative value here.
*/
-#define GREAT_SNR 30
+#define GREAT_SNR 25
+
+#define IS_5GHZ(n) (n > 4000)
/* Compare function for sorting scan results. Return >0 if @b is considered
* better. */
static int wpa_scan_result_compar(const void *a, const void *b)
{
-#define IS_5GHZ(n) (n > 4000)
#define MIN(a,b) a < b ? a : b
struct wpa_scan_res **_wa = (void *) a;
struct wpa_scan_res **_wb = (void *) b;
struct wpa_scan_res *wa = *_wa;
struct wpa_scan_res *wb = *_wb;
- int wpa_a, wpa_b, maxrate_a, maxrate_b;
- int snr_a, snr_b;
+ int wpa_a, wpa_b;
+ int snr_a, snr_b, snr_a_full, snr_b_full;
/* WPA/WPA2 support preferred */
wpa_a = wpa_scan_get_vendor_ie(wa, WPA_IE_VENDOR_TYPE) != NULL ||
(wb->caps & IEEE80211_CAP_PRIVACY) == 0)
return -1;
- if ((wa->flags & wb->flags & WPA_SCAN_LEVEL_DBM) &&
- !((wa->flags | wb->flags) & WPA_SCAN_NOISE_INVALID)) {
- snr_a = MIN(wa->level - wa->noise, GREAT_SNR);
- snr_b = MIN(wb->level - wb->noise, GREAT_SNR);
+ if (wa->flags & wb->flags & WPA_SCAN_LEVEL_DBM) {
+ snr_a_full = wa->snr;
+ snr_a = MIN(wa->snr, GREAT_SNR);
+ snr_b_full = wb->snr;
+ snr_b = MIN(wb->snr, GREAT_SNR);
} else {
- /* Not suitable information to calculate SNR, so use level */
- snr_a = wa->level;
- snr_b = wb->level;
+ /* Level is not in dBm, so we can't calculate
+ * SNR. Just use raw level (units unknown). */
+ snr_a = snr_a_full = wa->level;
+ snr_b = snr_b_full = wb->level;
}
- /* best/max rate preferred if SNR close enough */
- if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) ||
+ /* if SNR is close, decide by max rate or frequency band */
+ if (snr_a && snr_b && abs(snr_b - snr_a) < 7) {
+ if (wa->est_throughput != wb->est_throughput)
+ return wb->est_throughput - wa->est_throughput;
+ }
+ if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) ||
(wa->qual && wb->qual && abs(wb->qual - wa->qual) < 10)) {
- maxrate_a = wpa_scan_get_max_rate(wa);
- maxrate_b = wpa_scan_get_max_rate(wb);
- if (maxrate_a != maxrate_b)
- return maxrate_b - maxrate_a;
if (IS_5GHZ(wa->freq) ^ IS_5GHZ(wb->freq))
return IS_5GHZ(wa->freq) ? -1 : 1;
}
- /* use freq for channel preference */
-
/* all things being equal, use SNR; if SNRs are
* identical, use quality values since some drivers may only report
* that value and leave the signal level zero */
- if (snr_b == snr_a)
+ if (snr_b_full == snr_a_full)
return wb->qual - wa->qual;
- return snr_b - snr_a;
+ return snr_b_full - snr_a_full;
#undef MIN
-#undef IS_5GHZ
}
for (i = 0; i < scan_res->num; i++) {
struct wpa_scan_res *r = scan_res->res[i];
u8 *pos;
- if ((r->flags & (WPA_SCAN_LEVEL_DBM | WPA_SCAN_NOISE_INVALID))
- == WPA_SCAN_LEVEL_DBM) {
- int snr = r->level - r->noise;
+ if (r->flags & WPA_SCAN_LEVEL_DBM) {
+ int noise_valid = !(r->flags & WPA_SCAN_NOISE_INVALID);
+
wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
- "noise=%d level=%d snr=%d%s flags=0x%x "
- "age=%u",
+ "noise=%d%s level=%d snr=%d%s flags=0x%x age=%u est=%u",
MAC2STR(r->bssid), r->freq, r->qual,
- r->noise, r->level, snr,
- snr >= GREAT_SNR ? "*" : "", r->flags,
- r->age);
+ r->noise, noise_valid ? "" : "~", r->level,
+ r->snr, r->snr >= GREAT_SNR ? "*" : "",
+ r->flags,
+ r->age, r->est_throughput);
} else {
wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
- "noise=%d level=%d flags=0x%x age=%u",
+ "noise=%d level=%d flags=0x%x age=%u est=%u",
MAC2STR(r->bssid), r->freq, r->qual,
- r->noise, r->level, r->flags, r->age);
+ r->noise, r->level, r->flags, r->age,
+ r->est_throughput);
}
pos = (u8 *) (r + 1);
if (r->ie_len)
}
-static void filter_scan_res(struct wpa_supplicant *wpa_s,
- struct wpa_scan_results *res)
+void filter_scan_res(struct wpa_supplicant *wpa_s,
+ struct wpa_scan_results *res)
{
size_t i, j;
}
+/*
+ * Noise floor values to use when we have signal strength
+ * measurements, but no noise floor measurements. These values were
+ * measured in an office environment with many APs.
+ */
+#define DEFAULT_NOISE_FLOOR_2GHZ (-89)
+#define DEFAULT_NOISE_FLOOR_5GHZ (-92)
+
+void scan_snr(struct wpa_scan_res *res)
+{
+ if (res->flags & WPA_SCAN_NOISE_INVALID) {
+ res->noise = IS_5GHZ(res->freq) ?
+ DEFAULT_NOISE_FLOOR_5GHZ :
+ DEFAULT_NOISE_FLOOR_2GHZ;
+ }
+
+ if (res->flags & WPA_SCAN_LEVEL_DBM) {
+ res->snr = res->level - res->noise;
+ } else {
+ /* Level is not in dBm, so we can't calculate
+ * SNR. Just use raw level (units unknown). */
+ res->snr = res->level;
+ }
+}
+
+
+static unsigned int max_ht20_rate(int snr)
+{
+ if (snr < 6)
+ return 6500; /* HT20 MCS0 */
+ if (snr < 8)
+ return 13000; /* HT20 MCS1 */
+ if (snr < 13)
+ return 19500; /* HT20 MCS2 */
+ if (snr < 17)
+ return 26000; /* HT20 MCS3 */
+ if (snr < 20)
+ return 39000; /* HT20 MCS4 */
+ if (snr < 23)
+ return 52000; /* HT20 MCS5 */
+ if (snr < 24)
+ return 58500; /* HT20 MCS6 */
+ return 65000; /* HT20 MCS7 */
+}
+
+
+static unsigned int max_ht40_rate(int snr)
+{
+ if (snr < 3)
+ return 13500; /* HT40 MCS0 */
+ if (snr < 6)
+ return 27000; /* HT40 MCS1 */
+ if (snr < 10)
+ return 40500; /* HT40 MCS2 */
+ if (snr < 15)
+ return 54000; /* HT40 MCS3 */
+ if (snr < 17)
+ return 81000; /* HT40 MCS4 */
+ if (snr < 22)
+ return 108000; /* HT40 MCS5 */
+ if (snr < 24)
+ return 121500; /* HT40 MCS6 */
+ return 135000; /* HT40 MCS7 */
+}
+
+
+static unsigned int max_vht80_rate(int snr)
+{
+ if (snr < 1)
+ return 0;
+ if (snr < 2)
+ return 29300; /* VHT80 MCS0 */
+ if (snr < 5)
+ return 58500; /* VHT80 MCS1 */
+ if (snr < 9)
+ return 87800; /* VHT80 MCS2 */
+ if (snr < 11)
+ return 117000; /* VHT80 MCS3 */
+ if (snr < 15)
+ return 175500; /* VHT80 MCS4 */
+ if (snr < 16)
+ return 234000; /* VHT80 MCS5 */
+ if (snr < 18)
+ return 263300; /* VHT80 MCS6 */
+ if (snr < 20)
+ return 292500; /* VHT80 MCS7 */
+ if (snr < 22)
+ return 351000; /* VHT80 MCS8 */
+ return 390000; /* VHT80 MCS9 */
+}
+
+
+void scan_est_throughput(struct wpa_supplicant *wpa_s,
+ struct wpa_scan_res *res)
+{
+ enum local_hw_capab capab = wpa_s->hw_capab;
+ int rate; /* max legacy rate in 500 kb/s units */
+ const u8 *ie;
+ unsigned int est, tmp;
+ int snr = res->snr;
+
+ if (res->est_throughput)
+ return;
+
+ /* Get maximum legacy rate */
+ rate = wpa_scan_get_max_rate(res);
+
+ /* Limit based on estimated SNR */
+ if (rate > 1 * 2 && snr < 1)
+ rate = 1 * 2;
+ else if (rate > 2 * 2 && snr < 4)
+ rate = 2 * 2;
+ else if (rate > 6 * 2 && snr < 5)
+ rate = 6 * 2;
+ else if (rate > 9 * 2 && snr < 6)
+ rate = 9 * 2;
+ else if (rate > 12 * 2 && snr < 7)
+ rate = 12 * 2;
+ else if (rate > 18 * 2 && snr < 10)
+ rate = 18 * 2;
+ else if (rate > 24 * 2 && snr < 11)
+ rate = 24 * 2;
+ else if (rate > 36 * 2 && snr < 15)
+ rate = 36 * 2;
+ else if (rate > 48 * 2 && snr < 19)
+ rate = 48 * 2;
+ else if (rate > 54 * 2 && snr < 21)
+ rate = 54 * 2;
+ est = rate * 500;
+
+ if (capab == CAPAB_HT || capab == CAPAB_HT40 || capab == CAPAB_VHT) {
+ ie = wpa_scan_get_ie(res, WLAN_EID_HT_CAP);
+ if (ie) {
+ tmp = max_ht20_rate(snr);
+ if (tmp > est)
+ est = tmp;
+ }
+ }
+
+ if (capab == CAPAB_HT40 || capab == CAPAB_VHT) {
+ ie = wpa_scan_get_ie(res, WLAN_EID_HT_OPERATION);
+ if (ie && ie[1] >= 2 &&
+ (ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) {
+ tmp = max_ht40_rate(snr);
+ if (tmp > est)
+ est = tmp;
+ }
+ }
+
+ if (capab == CAPAB_VHT) {
+ /* Use +1 to assume VHT is always faster than HT */
+ ie = wpa_scan_get_ie(res, WLAN_EID_VHT_CAP);
+ if (ie) {
+ tmp = max_ht20_rate(snr) + 1;
+ if (tmp > est)
+ est = tmp;
+
+ ie = wpa_scan_get_ie(res, WLAN_EID_HT_OPERATION);
+ if (ie && ie[1] >= 2 &&
+ (ie[3] &
+ HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) {
+ tmp = max_ht40_rate(snr) + 1;
+ if (tmp > est)
+ est = tmp;
+ }
+
+ ie = wpa_scan_get_ie(res, WLAN_EID_VHT_OPERATION);
+ if (ie && ie[1] >= 1 &&
+ (ie[2] & VHT_OPMODE_CHANNEL_WIDTH_MASK)) {
+ tmp = max_vht80_rate(snr) + 1;
+ if (tmp > est)
+ est = tmp;
+ }
+ }
+ }
+
+ /* TODO: channel utilization and AP load (e.g., from AP Beacon) */
+
+ res->est_throughput = est;
+}
+
+
/**
* wpa_supplicant_get_scan_results - Get scan results
* @wpa_s: Pointer to wpa_supplicant data
}
filter_scan_res(wpa_s, scan_res);
+ for (i = 0; i < scan_res->num; i++) {
+ struct wpa_scan_res *scan_res_item = scan_res->res[i];
+
+ scan_snr(scan_res_item);
+ scan_est_throughput(wpa_s, scan_res_item);
+ }
+
#ifdef CONFIG_WPS
- if (wpas_wps_in_progress(wpa_s)) {
+ if (wpas_wps_searching(wpa_s)) {
wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS "
"provisioning rules");
compar = wpa_scan_result_wps_compar;
}
#endif /* CONFIG_WPS */
- qsort(scan_res->res, scan_res->num, sizeof(struct wpa_scan_res *),
- compar);
+ if (scan_res->res) {
+ qsort(scan_res->res, scan_res->num,
+ sizeof(struct wpa_scan_res *), compar);
+ }
dump_scan_res(scan_res);
+ if (wpa_s->ignore_post_flush_scan_res) {
+ /* FLUSH command aborted an ongoing scan and these are the
+ * results from the aborted scan. Do not process the results to
+ * maintain flushed state. */
+ wpa_dbg(wpa_s, MSG_DEBUG,
+ "Do not update BSS table based on pending post-FLUSH scan results");
+ wpa_s->ignore_post_flush_scan_res = 0;
+ return scan_res;
+ }
+
wpa_bss_update_start(wpa_s);
for (i = 0; i < scan_res->num; i++)
wpa_bss_update_scan_res(wpa_s, scan_res->res[i],
}
wpas_notify_scan_results(wpa_s);
wpas_notify_scan_done(wpa_s, 1);
+ if (wpa_s->scan_work) {
+ struct wpa_radio_work *work = wpa_s->scan_work;
+ wpa_s->scan_work = NULL;
+ radio_work_done(work);
+ }
+
+ if (wpa_s->wpa_state == WPA_SCANNING)
+ wpa_supplicant_set_state(wpa_s, wpa_s->scan_prev_wpa_state);
}
{
return eloop_is_timeout_registered(wpa_supplicant_scan, wpa_s, NULL);
}
+
+
+struct wpa_driver_scan_params *
+wpa_scan_clone_params(const struct wpa_driver_scan_params *src)
+{
+ struct wpa_driver_scan_params *params;
+ size_t i;
+ u8 *n;
+
+ params = os_zalloc(sizeof(*params));
+ if (params == NULL)
+ return NULL;
+
+ for (i = 0; i < src->num_ssids; i++) {
+ if (src->ssids[i].ssid) {
+ n = os_malloc(src->ssids[i].ssid_len);
+ if (n == NULL)
+ goto failed;
+ os_memcpy(n, src->ssids[i].ssid,
+ src->ssids[i].ssid_len);
+ params->ssids[i].ssid = n;
+ params->ssids[i].ssid_len = src->ssids[i].ssid_len;
+ }
+ }
+ params->num_ssids = src->num_ssids;
+
+ if (src->extra_ies) {
+ n = os_malloc(src->extra_ies_len);
+ if (n == NULL)
+ goto failed;
+ os_memcpy(n, src->extra_ies, src->extra_ies_len);
+ params->extra_ies = n;
+ params->extra_ies_len = src->extra_ies_len;
+ }
+
+ if (src->freqs) {
+ int len = int_array_len(src->freqs);
+ params->freqs = os_malloc((len + 1) * sizeof(int));
+ if (params->freqs == NULL)
+ goto failed;
+ os_memcpy(params->freqs, src->freqs, (len + 1) * sizeof(int));
+ }
+
+ if (src->filter_ssids) {
+ params->filter_ssids = os_malloc(sizeof(*params->filter_ssids) *
+ src->num_filter_ssids);
+ if (params->filter_ssids == NULL)
+ goto failed;
+ os_memcpy(params->filter_ssids, src->filter_ssids,
+ sizeof(*params->filter_ssids) *
+ src->num_filter_ssids);
+ params->num_filter_ssids = src->num_filter_ssids;
+ }
+
+ params->filter_rssi = src->filter_rssi;
+ params->p2p_probe = src->p2p_probe;
+ params->only_new_results = src->only_new_results;
+ params->low_priority = src->low_priority;
+ params->duration = src->duration;
+ params->duration_mandatory = src->duration_mandatory;
+
+ if (src->sched_scan_plans_num > 0) {
+ params->sched_scan_plans =
+ os_malloc(sizeof(*src->sched_scan_plans) *
+ src->sched_scan_plans_num);
+ if (!params->sched_scan_plans)
+ goto failed;
+
+ os_memcpy(params->sched_scan_plans, src->sched_scan_plans,
+ sizeof(*src->sched_scan_plans) *
+ src->sched_scan_plans_num);
+ params->sched_scan_plans_num = src->sched_scan_plans_num;
+ }
+
+ if (src->mac_addr_rand) {
+ params->mac_addr_rand = src->mac_addr_rand;
+
+ if (src->mac_addr && src->mac_addr_mask) {
+ u8 *mac_addr;
+
+ mac_addr = os_malloc(2 * ETH_ALEN);
+ if (!mac_addr)
+ goto failed;
+
+ os_memcpy(mac_addr, src->mac_addr, ETH_ALEN);
+ os_memcpy(mac_addr + ETH_ALEN, src->mac_addr_mask,
+ ETH_ALEN);
+ params->mac_addr = mac_addr;
+ params->mac_addr_mask = mac_addr + ETH_ALEN;
+ }
+ }
+
+ if (src->bssid) {
+ u8 *bssid;
+
+ bssid = os_malloc(ETH_ALEN);
+ if (!bssid)
+ goto failed;
+ os_memcpy(bssid, src->bssid, ETH_ALEN);
+ params->bssid = bssid;
+ }
+
+ params->relative_rssi_set = src->relative_rssi_set;
+ params->relative_rssi = src->relative_rssi;
+ params->relative_adjust_band = src->relative_adjust_band;
+ params->relative_adjust_rssi = src->relative_adjust_rssi;
+ return params;
+
+failed:
+ wpa_scan_free_params(params);
+ return NULL;
+}
+
+
+void wpa_scan_free_params(struct wpa_driver_scan_params *params)
+{
+ size_t i;
+
+ if (params == NULL)
+ return;
+
+ for (i = 0; i < params->num_ssids; i++)
+ os_free((u8 *) params->ssids[i].ssid);
+ os_free((u8 *) params->extra_ies);
+ os_free(params->freqs);
+ os_free(params->filter_ssids);
+ os_free(params->sched_scan_plans);
+
+ /*
+ * Note: params->mac_addr_mask points to same memory allocation and
+ * must not be freed separately.
+ */
+ os_free((u8 *) params->mac_addr);
+
+ os_free((u8 *) params->bssid);
+
+ os_free(params);
+}
+
+
+int wpas_start_pno(struct wpa_supplicant *wpa_s)
+{
+ int ret, prio;
+ size_t i, num_ssid, num_match_ssid;
+ struct wpa_ssid *ssid;
+ struct wpa_driver_scan_params params;
+ struct sched_scan_plan scan_plan;
+ unsigned int max_sched_scan_ssids;
+
+ if (!wpa_s->sched_scan_supported)
+ return -1;
+
+ if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS)
+ max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS;
+ else
+ max_sched_scan_ssids = wpa_s->max_sched_scan_ssids;
+ if (max_sched_scan_ssids < 1)
+ return -1;
+
+ if (wpa_s->pno || wpa_s->pno_sched_pending)
+ return 0;
+
+ if ((wpa_s->wpa_state > WPA_SCANNING) &&
+ (wpa_s->wpa_state < WPA_COMPLETED)) {
+ wpa_printf(MSG_ERROR, "PNO: In assoc process");
+ return -EAGAIN;
+ }
+
+ if (wpa_s->wpa_state == WPA_SCANNING) {
+ wpa_supplicant_cancel_scan(wpa_s);
+ if (wpa_s->sched_scanning) {
+ wpa_printf(MSG_DEBUG, "Schedule PNO on completion of "
+ "ongoing sched scan");
+ wpa_supplicant_cancel_sched_scan(wpa_s);
+ wpa_s->pno_sched_pending = 1;
+ return 0;
+ }
+ }
+
+ if (wpa_s->sched_scan_stop_req) {
+ wpa_printf(MSG_DEBUG,
+ "Schedule PNO after previous sched scan has stopped");
+ wpa_s->pno_sched_pending = 1;
+ return 0;
+ }
+
+ os_memset(¶ms, 0, sizeof(params));
+
+ num_ssid = num_match_ssid = 0;
+ ssid = wpa_s->conf->ssid;
+ while (ssid) {
+ if (!wpas_network_disabled(wpa_s, ssid)) {
+ num_match_ssid++;
+ if (ssid->scan_ssid)
+ num_ssid++;
+ }
+ ssid = ssid->next;
+ }
+
+ if (num_match_ssid == 0) {
+ wpa_printf(MSG_DEBUG, "PNO: No configured SSIDs");
+ return -1;
+ }
+
+ if (num_match_ssid > num_ssid) {
+ params.num_ssids++; /* wildcard */
+ num_ssid++;
+ }
+
+ if (num_ssid > max_sched_scan_ssids) {
+ wpa_printf(MSG_DEBUG, "PNO: Use only the first %u SSIDs from "
+ "%u", max_sched_scan_ssids, (unsigned int) num_ssid);
+ num_ssid = max_sched_scan_ssids;
+ }
+
+ if (num_match_ssid > wpa_s->max_match_sets) {
+ num_match_ssid = wpa_s->max_match_sets;
+ wpa_dbg(wpa_s, MSG_DEBUG, "PNO: Too many SSIDs to match");
+ }
+ params.filter_ssids = os_calloc(num_match_ssid,
+ sizeof(struct wpa_driver_scan_filter));
+ if (params.filter_ssids == NULL)
+ return -1;
+
+ i = 0;
+ prio = 0;
+ ssid = wpa_s->conf->pssid[prio];
+ while (ssid) {
+ if (!wpas_network_disabled(wpa_s, ssid)) {
+ if (ssid->scan_ssid && params.num_ssids < num_ssid) {
+ params.ssids[params.num_ssids].ssid =
+ ssid->ssid;
+ params.ssids[params.num_ssids].ssid_len =
+ ssid->ssid_len;
+ params.num_ssids++;
+ }
+ os_memcpy(params.filter_ssids[i].ssid, ssid->ssid,
+ ssid->ssid_len);
+ params.filter_ssids[i].ssid_len = ssid->ssid_len;
+ params.num_filter_ssids++;
+ i++;
+ if (i == num_match_ssid)
+ break;
+ }
+ if (ssid->pnext)
+ ssid = ssid->pnext;
+ else if (prio + 1 == wpa_s->conf->num_prio)
+ break;
+ else
+ ssid = wpa_s->conf->pssid[++prio];
+ }
+
+ if (wpa_s->conf->filter_rssi)
+ params.filter_rssi = wpa_s->conf->filter_rssi;
+
+ if (wpa_s->sched_scan_plans_num) {
+ params.sched_scan_plans = wpa_s->sched_scan_plans;
+ params.sched_scan_plans_num = wpa_s->sched_scan_plans_num;
+ } else {
+ /* Set one scan plan that will run infinitely */
+ if (wpa_s->conf->sched_scan_interval)
+ scan_plan.interval = wpa_s->conf->sched_scan_interval;
+ else
+ scan_plan.interval = 10;
+
+ scan_plan.iterations = 0;
+ params.sched_scan_plans = &scan_plan;
+ params.sched_scan_plans_num = 1;
+ }
+
+ if (params.freqs == NULL && wpa_s->manual_sched_scan_freqs) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "Limit sched scan to specified channels");
+ params.freqs = wpa_s->manual_sched_scan_freqs;
+ }
+
+ if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_PNO) &&
+ wpa_s->wpa_state <= WPA_SCANNING) {
+ params.mac_addr_rand = 1;
+ if (wpa_s->mac_addr_pno) {
+ params.mac_addr = wpa_s->mac_addr_pno;
+ params.mac_addr_mask = wpa_s->mac_addr_pno + ETH_ALEN;
+ }
+ }
+
+ wpa_scan_set_relative_rssi_params(wpa_s, ¶ms);
+
+ ret = wpa_supplicant_start_sched_scan(wpa_s, ¶ms);
+ os_free(params.filter_ssids);
+ if (ret == 0)
+ wpa_s->pno = 1;
+ else
+ wpa_msg(wpa_s, MSG_ERROR, "Failed to schedule PNO");
+ return ret;
+}
+
+
+int wpas_stop_pno(struct wpa_supplicant *wpa_s)
+{
+ int ret = 0;
+
+ if (!wpa_s->pno)
+ return 0;
+
+ ret = wpa_supplicant_stop_sched_scan(wpa_s);
+ wpa_s->sched_scan_stop_req = 1;
+
+ wpa_s->pno = 0;
+ wpa_s->pno_sched_pending = 0;
+
+ if (wpa_s->wpa_state == WPA_SCANNING)
+ wpa_supplicant_req_scan(wpa_s, 0, 0);
+
+ return ret;
+}
+
+
+void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant *wpa_s,
+ unsigned int type)
+{
+ type &= MAC_ADDR_RAND_ALL;
+ wpa_s->mac_addr_rand_enable &= ~type;
+
+ if (type & MAC_ADDR_RAND_SCAN) {
+ os_free(wpa_s->mac_addr_scan);
+ wpa_s->mac_addr_scan = NULL;
+ }
+
+ if (type & MAC_ADDR_RAND_SCHED_SCAN) {
+ os_free(wpa_s->mac_addr_sched_scan);
+ wpa_s->mac_addr_sched_scan = NULL;
+ }
+
+ if (type & MAC_ADDR_RAND_PNO) {
+ os_free(wpa_s->mac_addr_pno);
+ wpa_s->mac_addr_pno = NULL;
+ }
+}
+
+
+int wpas_mac_addr_rand_scan_set(struct wpa_supplicant *wpa_s,
+ unsigned int type, const u8 *addr,
+ const u8 *mask)
+{
+ u8 *tmp = NULL;
+
+ wpas_mac_addr_rand_scan_clear(wpa_s, type);
+
+ if (addr) {
+ tmp = os_malloc(2 * ETH_ALEN);
+ if (!tmp)
+ return -1;
+ os_memcpy(tmp, addr, ETH_ALEN);
+ os_memcpy(tmp + ETH_ALEN, mask, ETH_ALEN);
+ }
+
+ if (type == MAC_ADDR_RAND_SCAN) {
+ wpa_s->mac_addr_scan = tmp;
+ } else if (type == MAC_ADDR_RAND_SCHED_SCAN) {
+ wpa_s->mac_addr_sched_scan = tmp;
+ } else if (type == MAC_ADDR_RAND_PNO) {
+ wpa_s->mac_addr_pno = tmp;
+ } else {
+ wpa_printf(MSG_INFO,
+ "scan: Invalid MAC randomization type=0x%x",
+ type);
+ os_free(tmp);
+ return -1;
+ }
+
+ wpa_s->mac_addr_rand_enable |= type;
+ return 0;
+}
+
+
+int wpas_abort_ongoing_scan(struct wpa_supplicant *wpa_s)
+{
+ struct wpa_radio_work *work;
+ struct wpa_radio *radio = wpa_s->radio;
+
+ dl_list_for_each(work, &radio->work, struct wpa_radio_work, list) {
+ if (work->wpa_s != wpa_s || !work->started ||
+ (os_strcmp(work->type, "scan") != 0 &&
+ os_strcmp(work->type, "p2p-scan") != 0))
+ continue;
+ wpa_dbg(wpa_s, MSG_DEBUG, "Abort an ongoing scan");
+ return wpa_drv_abort_scan(wpa_s, wpa_s->curr_scan_cookie);
+ }
+
+ wpa_dbg(wpa_s, MSG_DEBUG, "No ongoing scan/p2p-scan found to abort");
+ return -1;
+}
+
+
+int wpas_sched_scan_plans_set(struct wpa_supplicant *wpa_s, const char *cmd)
+{
+ struct sched_scan_plan *scan_plans = NULL;
+ const char *token, *context = NULL;
+ unsigned int num = 0;
+
+ if (!cmd)
+ return -1;
+
+ if (!cmd[0]) {
+ wpa_printf(MSG_DEBUG, "Clear sched scan plans");
+ os_free(wpa_s->sched_scan_plans);
+ wpa_s->sched_scan_plans = NULL;
+ wpa_s->sched_scan_plans_num = 0;
+ return 0;
+ }
+
+ while ((token = cstr_token(cmd, " ", &context))) {
+ int ret;
+ struct sched_scan_plan *scan_plan, *n;
+
+ n = os_realloc_array(scan_plans, num + 1, sizeof(*scan_plans));
+ if (!n)
+ goto fail;
+
+ scan_plans = n;
+ scan_plan = &scan_plans[num];
+ num++;
+
+ ret = sscanf(token, "%u:%u", &scan_plan->interval,
+ &scan_plan->iterations);
+ if (ret <= 0 || ret > 2 || !scan_plan->interval) {
+ wpa_printf(MSG_ERROR,
+ "Invalid sched scan plan input: %s", token);
+ goto fail;
+ }
+
+ if (scan_plan->interval > wpa_s->max_sched_scan_plan_interval) {
+ wpa_printf(MSG_WARNING,
+ "scan plan %u: Scan interval too long(%u), use the maximum allowed(%u)",
+ num, scan_plan->interval,
+ wpa_s->max_sched_scan_plan_interval);
+ scan_plan->interval =
+ wpa_s->max_sched_scan_plan_interval;
+ }
+
+ if (ret == 1) {
+ scan_plan->iterations = 0;
+ break;
+ }
+
+ if (!scan_plan->iterations) {
+ wpa_printf(MSG_ERROR,
+ "scan plan %u: Number of iterations cannot be zero",
+ num);
+ goto fail;
+ }
+
+ if (scan_plan->iterations >
+ wpa_s->max_sched_scan_plan_iterations) {
+ wpa_printf(MSG_WARNING,
+ "scan plan %u: Too many iterations(%u), use the maximum allowed(%u)",
+ num, scan_plan->iterations,
+ wpa_s->max_sched_scan_plan_iterations);
+ scan_plan->iterations =
+ wpa_s->max_sched_scan_plan_iterations;
+ }
+
+ wpa_printf(MSG_DEBUG,
+ "scan plan %u: interval=%u iterations=%u",
+ num, scan_plan->interval, scan_plan->iterations);
+ }
+
+ if (!scan_plans) {
+ wpa_printf(MSG_ERROR, "Invalid scan plans entry");
+ goto fail;
+ }
+
+ if (cstr_token(cmd, " ", &context) || scan_plans[num - 1].iterations) {
+ wpa_printf(MSG_ERROR,
+ "All scan plans but the last must specify a number of iterations");
+ goto fail;
+ }
+
+ wpa_printf(MSG_DEBUG, "scan plan %u (last plan): interval=%u",
+ num, scan_plans[num - 1].interval);
+
+ if (num > wpa_s->max_sched_scan_plans) {
+ wpa_printf(MSG_WARNING,
+ "Too many scheduled scan plans (only %u supported)",
+ wpa_s->max_sched_scan_plans);
+ wpa_printf(MSG_WARNING,
+ "Use only the first %u scan plans, and the last one (in infinite loop)",
+ wpa_s->max_sched_scan_plans - 1);
+ os_memcpy(&scan_plans[wpa_s->max_sched_scan_plans - 1],
+ &scan_plans[num - 1], sizeof(*scan_plans));
+ num = wpa_s->max_sched_scan_plans;
+ }
+
+ os_free(wpa_s->sched_scan_plans);
+ wpa_s->sched_scan_plans = scan_plans;
+ wpa_s->sched_scan_plans_num = num;
+
+ return 0;
+
+fail:
+ os_free(scan_plans);
+ wpa_printf(MSG_ERROR, "invalid scan plans list");
+ return -1;
+}
+
+
+/**
+ * wpas_scan_reset_sched_scan - Reset sched_scan state
+ * @wpa_s: Pointer to wpa_supplicant data
+ *
+ * This function is used to cancel a running scheduled scan and to reset an
+ * internal scan state to continue with a regular scan on the following
+ * wpa_supplicant_req_scan() calls.
+ */
+void wpas_scan_reset_sched_scan(struct wpa_supplicant *wpa_s)
+{
+ wpa_s->normal_scans = 0;
+ if (wpa_s->sched_scanning) {
+ wpa_s->sched_scan_timed_out = 0;
+ wpa_s->prev_sched_ssid = NULL;
+ wpa_supplicant_cancel_sched_scan(wpa_s);
+ }
+}
+
+
+void wpas_scan_restart_sched_scan(struct wpa_supplicant *wpa_s)
+{
+ /* simulate timeout to restart the sched scan */
+ wpa_s->sched_scan_timed_out = 1;
+ wpa_s->prev_sched_ssid = NULL;
+ wpa_supplicant_cancel_sched_scan(wpa_s);
+}