/*
* WPA Supplicant - Scanning
- * Copyright (c) 2003-2010, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2003-2012, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
#include "utils/common.h"
#include "utils/eloop.h"
#include "common/ieee802_11_defs.h"
+#include "common/wpa_ctrl.h"
#include "config.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
}
#ifdef CONFIG_P2P
- if (!wpa_s->global->p2p_disabled && wpa_s->global->p2p) {
+ if (!wpa_s->global->p2p_disabled && wpa_s->global->p2p &&
+ !wpa_s->conf->p2p_disabled) {
wpa_s->wps->dev.p2p = 1;
if (!wps) {
wps = 1;
#endif /* CONFIG_WPS */
+/**
+ * wpa_supplicant_enabled_networks - Check whether there are enabled networks
+ * @wpa_s: Pointer to wpa_supplicant data
+ * Returns: 0 if no networks are enabled, >0 if networks are enabled
+ *
+ * This function is used to figure out whether any networks (or Interworking
+ * with enabled credentials and auto_interworking) are present in the current
+ * configuration.
+ */
int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s)
{
struct wpa_ssid *ssid = wpa_s->conf->ssid;
- int count = 0;
+ int count = 0, disabled = 0;
while (ssid) {
if (!wpas_network_disabled(wpa_s, ssid))
count++;
+ else
+ disabled++;
ssid = ssid->next;
}
+ if (wpa_s->conf->cred && wpa_s->conf->interworking &&
+ wpa_s->conf->auto_interworking)
+ count++;
+ if (count == 0 && disabled > 0) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks (%d disabled "
+ "networks)", disabled);
+ }
return count;
}
reslen = int_array_len(*res);
alen = int_array_len(a);
- n = os_realloc(*res, (reslen + alen + 1) * sizeof(int));
+ n = os_realloc_array(*res, reslen + alen + 1, sizeof(int));
if (n == NULL) {
os_free(*res);
*res = NULL;
}
+/**
+ * wpa_supplicant_trigger_scan - Request driver to start a scan
+ * @wpa_s: Pointer to wpa_supplicant data
+ * @params: Scan parameters
+ * Returns: 0 on success, -1 on failure
+ */
int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s,
struct wpa_driver_scan_params *params)
{
#endif /* CONFIG_INTERWORKING */
-static struct wpabuf *
-wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s,
- struct wpa_driver_scan_params *params)
+static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s)
{
struct wpabuf *extra_ie = NULL;
#ifdef CONFIG_WPS
}
+#ifdef CONFIG_P2P
+
+/*
+ * Check whether there are any enabled networks or credentials that could be
+ * used for a non-P2P connection.
+ */
+static int non_p2p_network_enabled(struct wpa_supplicant *wpa_s)
+{
+ struct wpa_ssid *ssid;
+
+ for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
+ if (wpas_network_disabled(wpa_s, ssid))
+ continue;
+ if (!ssid->p2p_group)
+ return 1;
+ }
+
+ if (wpa_s->conf->cred && wpa_s->conf->interworking &&
+ wpa_s->conf->auto_interworking)
+ return 1;
+
+ return 0;
+}
+
+
+/*
+ * Find the operating frequency of any other virtual interface that is using
+ * the same radio concurrently.
+ */
+static int shared_vif_oper_freq(struct wpa_supplicant *wpa_s)
+{
+ const char *rn, *rn2;
+ struct wpa_supplicant *ifs;
+ u8 bssid[ETH_ALEN];
+
+ if (!wpa_s->driver->get_radio_name)
+ return -1;
+
+ rn = wpa_s->driver->get_radio_name(wpa_s->drv_priv);
+ if (rn == NULL || rn[0] == '\0')
+ return -1;
+
+ for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) {
+ if (ifs == wpa_s || !ifs->driver->get_radio_name)
+ continue;
+
+ rn2 = ifs->driver->get_radio_name(ifs->drv_priv);
+ if (!rn2 || os_strcmp(rn, rn2) != 0)
+ continue;
+
+ if (ifs->current_ssid == NULL || ifs->assoc_freq == 0)
+ continue;
+
+ if (ifs->current_ssid->mode == WPAS_MODE_AP ||
+ ifs->current_ssid->mode == WPAS_MODE_P2P_GO)
+ return ifs->current_ssid->frequency;
+ if (wpa_drv_get_bssid(ifs, bssid) == 0)
+ return ifs->assoc_freq;
+ }
+
+ return 0;
+}
+
+#endif /* CONFIG_P2P */
+
+
static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
struct wpa_ssid *ssid;
- int scan_req = 0, ret;
+ enum scan_req_type scan_req = NORMAL_SCAN_REQ;
+ int ret;
struct wpabuf *extra_ie = NULL;
struct wpa_driver_scan_params params;
struct wpa_driver_scan_params *scan_params;
return;
}
- if (wpa_s->disconnected && !wpa_s->scan_req) {
+ 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);
return;
}
-
+#ifdef ANDROID
+ if (wpa_s->scanning) {
+ /* If we are already in scanning state, we shall ignore this new scan request*/
+ wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - already scanning");
+ return;
+ }
+#endif
if (!wpa_supplicant_enabled_networks(wpa_s) &&
- !wpa_s->scan_req) {
+ 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);
+#ifdef CONFIG_P2P
+ wpa_s->sta_scan_pending = 0;
+#endif /* CONFIG_P2P */
return;
}
#ifdef CONFIG_P2P
if (wpas_p2p_in_progress(wpa_s)) {
- if (wpa_s->wpa_state == WPA_SCANNING) {
+ 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);
- } else {
- wpa_dbg(wpa_s, MSG_DEBUG, "Do not request scan while "
- "P2P operation is in progress");
+ return;
}
- return;
}
#endif /* CONFIG_P2P */
}
scan_req = wpa_s->scan_req;
- wpa_s->scan_req = 0;
+ wpa_s->scan_req = NORMAL_SCAN_REQ;
os_memset(¶ms, 0, sizeof(params));
goto scan;
}
- if (scan_req != 2 && wpa_s->connect_without_scan) {
+ if (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;
}
}
- if (scan_req != 2 && wpa_s->conf->ap_scan == 2) {
+ if (scan_req != MANUAL_SCAN_REQ && wpa_s->conf->ap_scan == 2) {
wpa_s->connect_without_scan = NULL;
wpa_s->prev_scan_wildcard = 0;
wpa_supplicant_assoc_try(wpa_s, ssid);
#endif /* CONFIG_P2P */
wpa_supplicant_optimize_freqs(wpa_s, ¶ms);
- extra_ie = wpa_supplicant_extra_ies(wpa_s, ¶ms);
+ extra_ie = wpa_supplicant_extra_ies(wpa_s);
#ifdef CONFIG_HS20
- if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 6) == 0)
+ if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 7) == 0)
wpas_hs20_add_indication(extra_ie);
#endif /* CONFIG_HS20 */
scan_params = ¶ms;
scan:
+#ifdef CONFIG_P2P
+ /*
+ * If the driver does not support multi-channel concurrency and a
+ * virtual interface that shares the same radio with the wpa_s interface
+ * is operating there may not be need to scan other channels apart from
+ * the current operating channel on the other virtual interface. Filter
+ * out other channels in case we are trying to find a connection for a
+ * station interface when we are not configured to prefer station
+ * connection and a concurrent operation is already in process.
+ */
+ if (wpa_s->scan_for_connection && scan_req == NORMAL_SCAN_REQ &&
+ !scan_params->freqs && !params.freqs &&
+ wpas_is_p2p_prioritized(wpa_s) &&
+ !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_MULTI_CHANNEL_CONCURRENT) &&
+ wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE &&
+ non_p2p_network_enabled(wpa_s)) {
+ int freq = shared_vif_oper_freq(wpa_s);
+ if (freq > 0) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only the current "
+ "operating channel (%d MHz) since driver does "
+ "not support multi-channel concurrency", freq);
+ params.freqs = os_zalloc(sizeof(int) * 2);
+ if (params.freqs)
+ params.freqs[0] = freq;
+ scan_params->freqs = params.freqs;
+ }
+ }
+#endif /* CONFIG_P2P */
+
ret = wpa_supplicant_trigger_scan(wpa_s, scan_params);
wpabuf_free(extra_ie);
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);
+ /* Restore scan_req since we will try to scan again */
+ wpa_s->scan_req = scan_req;
wpa_supplicant_req_scan(wpa_s, 1, 0);
+ } else {
+ wpa_s->scan_for_connection = 0;
+ }
+}
+
+
+void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec)
+{
+ struct os_time remaining, new_int;
+ int cancelled;
+
+ cancelled = eloop_cancel_timeout_one(wpa_supplicant_scan, wpa_s, NULL,
+ &remaining);
+
+ new_int.sec = sec;
+ new_int.usec = 0;
+ if (cancelled && os_time_before(&remaining, &new_int)) {
+ new_int.sec = remaining.sec;
+ new_int.usec = remaining.usec;
}
+
+ eloop_register_timeout(new_int.sec, new_int.usec, wpa_supplicant_scan,
+ wpa_s, NULL);
+ wpa_s->scan_interval = sec;
}
* @wpa_s: Pointer to wpa_supplicant data
* @sec: Number of seconds after which to scan
* @usec: Number of microseconds after which to scan
+ * Returns: 0 on success or -1 otherwise
*
* This function is used to schedule periodic scans for neighboring
* access points after the specified time.
/**
* wpa_supplicant_req_sched_scan - Start a periodic scheduled scan
* @wpa_s: Pointer to wpa_supplicant data
+ * Returns: 0 is sched_scan was started or -1 otherwise
*
* This function is used to schedule periodic scans for neighboring
* access points repeating the scan continuously.
struct wpa_driver_scan_params *scan_params;
enum wpa_states prev_state;
struct wpa_ssid *ssid = NULL;
- struct wpabuf *wps_ie = NULL;
+ struct wpabuf *extra_ie = NULL;
int ret;
unsigned int max_sched_scan_ssids;
int wildcard = 0;
params.filter_ssids = NULL;
}
- if (wpa_s->wps)
- wps_ie = wpa_supplicant_extra_ies(wpa_s, ¶ms);
+ extra_ie = wpa_supplicant_extra_ies(wpa_s);
+ if (extra_ie) {
+ params.extra_ies = wpabuf_head(extra_ie);
+ params.extra_ies_len = wpabuf_len(extra_ie);
+ }
scan_params = ¶ms;
ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params,
wpa_s->sched_scan_interval);
- wpabuf_free(wps_ie);
+ wpabuf_free(extra_ie);
os_free(params.filter_ssids);
if (ret) {
wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate sched scan");
}
+/**
+ * wpa_supplicant_notify_scanning - Indicate possible scan state change
+ * @wpa_s: Pointer to wpa_supplicant data
+ * @scanning: Whether scanning is currently in progress
+ *
+ * This function is to generate scanning notifycations. It is called whenever
+ * there may have been a change in scanning (scan started, completed, stopped).
+ * wpas_notify_scanning() is called whenever the scanning state changed from the
+ * previously notified state.
+ */
void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s,
int scanning)
{
}
+/**
+ * wpa_scan_get_ie - Fetch a specified information element from a scan result
+ * @res: Scan result entry
+ * @ie: Information element identitifier (WLAN_EID_*)
+ * Returns: Pointer to the information element (id field) or %NULL if not found
+ *
+ * This function returns the first matching information element in the scan
+ * result.
+ */
const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie)
{
const u8 *end, *pos;
}
+/**
+ * wpa_scan_get_vendor_ie - Fetch vendor information element from a scan result
+ * @res: Scan result entry
+ * @vendor_type: Vendor type (four octets starting the IE payload)
+ * Returns: Pointer to the information element (id field) or %NULL if not found
+ *
+ * This function returns the first matching information element in the scan
+ * result.
+ */
const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res,
u32 vendor_type)
{
}
+/**
+ * wpa_scan_get_vendor_ie_multi - Fetch vendor IE data from a scan result
+ * @res: Scan result entry
+ * @vendor_type: Vendor type (four octets starting the IE payload)
+ * Returns: Pointer to the information element payload or %NULL if not found
+ *
+ * This function returns concatenated payload of possibly fragmented vendor
+ * specific information elements in the scan result. The caller is responsible
+ * for freeing the returned buffer.
+ */
struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res,
u32 vendor_type)
{
}
-struct wpabuf * wpa_scan_get_vendor_ie_multi_beacon(
- const struct wpa_scan_res *res, u32 vendor_type)
-{
- struct wpabuf *buf;
- const u8 *end, *pos;
-
- if (res->beacon_ie_len == 0)
- return NULL;
- buf = wpabuf_alloc(res->beacon_ie_len);
- if (buf == NULL)
- return NULL;
-
- pos = (const u8 *) (res + 1);
- pos += res->ie_len;
- end = pos + res->beacon_ie_len;
-
- while (pos + 1 < end) {
- if (pos + 2 + pos[1] > end)
- break;
- if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
- vendor_type == WPA_GET_BE32(&pos[2]))
- wpabuf_put_data(buf, pos + 2 + 4, pos[1] - 4);
- pos += 2 + pos[1];
- }
-
- if (wpabuf_len(buf) == 0) {
- wpabuf_free(buf);
- buf = NULL;
- }
-
- return buf;
-}
-
-
/*
* Channels with a great SNR can operate at full rate. What is a great SNR?
* This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general
== WPA_SCAN_LEVEL_DBM) {
int snr = r->level - r->noise;
wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
- "noise=%d level=%d snr=%d%s flags=0x%x",
+ "noise=%d level=%d snr=%d%s flags=0x%x "
+ "age=%u",
MAC2STR(r->bssid), r->freq, r->qual,
r->noise, r->level, snr,
- snr >= GREAT_SNR ? "*" : "", r->flags);
+ snr >= GREAT_SNR ? "*" : "", r->flags,
+ r->age);
} else {
wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
- "noise=%d level=%d flags=0x%x",
+ "noise=%d level=%d flags=0x%x age=%u",
MAC2STR(r->bssid), r->freq, r->qual,
- r->noise, r->level, r->flags);
+ r->noise, r->level, r->flags, r->age);
}
pos = (u8 *) (r + 1);
if (r->ie_len)
}
+/**
+ * wpa_supplicant_filter_bssid_match - Is the specified BSSID allowed
+ * @wpa_s: Pointer to wpa_supplicant data
+ * @bssid: BSSID to check
+ * Returns: 0 if the BSSID is filtered or 1 if not
+ *
+ * This function is used to filter out specific BSSIDs from scan reslts mainly
+ * for testing purposes (SET bssid_filter ctrl_iface command).
+ */
int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s,
const u8 *bssid)
{
wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results");
return NULL;
}
+ if (scan_res->fetch_time.sec == 0) {
+ /*
+ * Make sure we have a valid timestamp if the driver wrapper
+ * does not set this.
+ */
+ os_get_time(&scan_res->fetch_time);
+ }
filter_scan_res(wpa_s, scan_res);
#ifdef CONFIG_WPS
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]);
+ wpa_bss_update_scan_res(wpa_s, scan_res->res[i],
+ &scan_res->fetch_time);
wpa_bss_update_end(wpa_s, info, new_scan);
return scan_res;
}
+/**
+ * wpa_supplicant_update_scan_results - Update scan results from the driver
+ * @wpa_s: Pointer to wpa_supplicant data
+ * Returns: 0 on success, -1 on failure
+ *
+ * This function updates the BSS table within wpa_supplicant based on the
+ * currently available scan results from the driver without requesting a new
+ * scan. This is used in cases where the driver indicates an association
+ * (including roaming within ESS) and wpa_supplicant does not yet have the
+ * needed information to complete the connection (e.g., to perform validation
+ * steps in 4-way handshake).
+ */
int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s)
{
struct wpa_scan_results *scan_res;
return 0;
}
+
+
+/**
+ * scan_only_handler - Reports scan results
+ */
+void scan_only_handler(struct wpa_supplicant *wpa_s,
+ struct wpa_scan_results *scan_res)
+{
+ wpa_dbg(wpa_s, MSG_DEBUG, "Scan-only results received");
+ wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
+ wpas_notify_scan_results(wpa_s);
+ wpas_notify_scan_done(wpa_s, 1);
+}
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