/*
* WPA Supplicant - Scanning
- * Copyright (c) 2003-2010, 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 "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"
#include "notify.h"
#include "bss.h"
#include "scan.h"
+#include "mesh.h"
static void wpa_supplicant_gen_assoc_event(struct wpa_supplicant *wpa_s)
#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;
}
-static int int_array_len(const int *a)
-{
- int i;
- for (i = 0; a && a[i]; i++)
- ;
- return i;
-}
-
-
-static void int_array_concat(int **res, const int *a)
+static void wpas_trigger_scan_cb(struct wpa_radio_work *work, int deinit)
{
- int reslen, alen, i;
- int *n;
-
- reslen = int_array_len(*res);
- alen = int_array_len(a);
+ struct wpa_supplicant *wpa_s = work->wpa_s;
+ struct wpa_driver_scan_params *params = work->ctx;
+ int ret;
- n = os_realloc_array(*res, reslen + alen + 1, sizeof(int));
- if (n == NULL) {
- os_free(*res);
- *res = NULL;
+ 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;
}
- for (i = 0; i <= alen; i++)
- n[reslen + i] = a[i];
- *res = n;
-}
-
-
-static int freq_cmp(const void *a, const void *b)
-{
- int _a = *(int *) a;
- int _b = *(int *) b;
-
- if (_a == 0)
- return 1;
- if (_b == 0)
- return -1;
- return _a - _b;
-}
-
-static void int_array_sort_unique(int *a)
-{
- int alen;
- int i, j;
-
- if (a == NULL)
+ if (wpas_update_random_addr_disassoc(wpa_s) < 0) {
+ wpa_msg(wpa_s, MSG_INFO,
+ "Failed to assign random MAC address for a scan");
+ radio_work_done(work);
return;
+ }
- alen = int_array_len(a);
- qsort(a, alen, sizeof(int), freq_cmp);
+ wpa_supplicant_notify_scanning(wpa_s, 1);
- i = 0;
- j = 1;
- while (a[i] && a[j]) {
- if (a[i] == a[j]) {
- j++;
- continue;
- }
- a[++i] = a[j++];
+ if (wpa_s->clear_driver_scan_cache)
+ params->only_new_results = 1;
+ ret = wpa_drv_scan(wpa_s, params);
+ wpa_scan_free_params(params);
+ work->ctx = NULL;
+ if (ret) {
+ wpa_supplicant_notify_scanning(wpa_s, 0);
+ wpas_notify_scan_done(wpa_s, 0);
+ radio_work_done(work);
+ return;
}
- if (a[i])
- i++;
- a[i] = 0;
+
+ 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
+ * @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)
{
- 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 {
- wpa_s->scan_runs++;
- wpa_s->normal_scans++;
+ ctx = wpa_scan_clone_params(params);
+ if (ctx == NULL)
+ return -1;
+
+ if (radio_add_work(wpa_s, 0, "scan", 0, wpas_trigger_scan_cb, ctx) < 0)
+ {
+ wpa_scan_free_params(ctx);
+ return -1;
}
- return ret;
+ return 0;
}
}
-static int
-wpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s,
- struct wpa_driver_scan_params *params,
- int interval)
+int wpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s,
+ struct wpa_driver_scan_params *params,
+ int interval)
{
int ret;
}
-static int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s)
+int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s)
{
int ret;
}
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_zalloc(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
if (params->freqs)
params->freqs[0] = wpa_s->wps_freq;
wpa_s->after_wps--;
- }
+ } else if (wpa_s->after_wps)
+ wpa_s->after_wps--;
if (params->freqs == NULL && wpa_s->known_wps_freq && wpa_s->wps_freq)
{
return;
wpabuf_put_u8(buf, WLAN_EID_EXT_CAPAB);
- wpabuf_put_u8(buf, 4);
+ wpabuf_put_u8(buf, 6);
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, 0x00);
+#ifdef CONFIG_HS20
+ wpabuf_put_u8(buf, 0x40); /* Bit 46 - WNM-Notification */
+#else /* CONFIG_HS20 */
+ wpabuf_put_u8(buf, 0x00);
+#endif /* CONFIG_HS20 */
wpabuf_put_u8(buf, WLAN_EID_INTERWORKING);
wpabuf_put_u8(buf, is_zero_ether_addr(wpa_s->conf->hessid) ? 1 :
}
#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, -1);
+#endif /* CONFIG_HS20 */
+
return extra_ie;
}
return 0;
}
+#endif /* CONFIG_P2P */
+
-/*
- * 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)
+static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
+ u16 num_modes,
+ enum hostapd_hw_mode mode)
{
- const char *rn, *rn2;
- struct wpa_supplicant *ifs;
- u8 bssid[ETH_ALEN];
+ u16 i;
- if (!wpa_s->driver->get_radio_name)
- return -1;
+ for (i = 0; i < num_modes; i++) {
+ if (modes[i].mode == mode)
+ return &modes[i];
+ }
- rn = wpa_s->driver->get_radio_name(wpa_s->drv_priv);
- if (rn == NULL || rn[0] == '\0')
- return -1;
+ return NULL;
+}
- 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)
+static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
+ enum hostapd_hw_mode band,
+ struct wpa_driver_scan_params *params)
+{
+ /* Include only supported channels for the specified band */
+ struct hostapd_hw_modes *mode;
+ int count, i;
+
+ mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
+ if (mode == NULL) {
+ /* No channels supported in this band - use empty list */
+ params->freqs = os_zalloc(sizeof(int));
+ return;
+ }
+
+ params->freqs = os_zalloc((mode->num_channels + 1) * sizeof(int));
+ if (params->freqs == NULL)
+ return;
+ for (count = 0, i = 0; i < mode->num_channels; i++) {
+ if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
continue;
+ params->freqs[count++] = mode->channels[i].freq;
+ }
+}
+
- if (ifs->current_ssid == NULL || ifs->assoc_freq == 0)
+static void wpa_setband_scan_freqs(struct wpa_supplicant *wpa_s,
+ struct wpa_driver_scan_params *params)
+{
+ if (wpa_s->hw.modes == NULL)
+ return; /* unknown what channels the driver supports */
+ if (params->freqs)
+ return; /* already using a limited channel set */
+ if (wpa_s->setband == WPA_SETBAND_5G)
+ wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211A,
+ params);
+ else if (wpa_s->setband == WPA_SETBAND_2G)
+ wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G,
+ params);
+}
+
+
+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 (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;
- 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;
+ 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++;
}
- return 0;
+ wpa_s->scan_id_count = 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;
- enum scan_req_type scan_req = NORMAL_SCAN_REQ;
int ret;
struct wpabuf *extra_ie = NULL;
struct wpa_driver_scan_params params;
size_t max_ssids;
enum wpa_states prev_state;
+ if (wpa_s->pno || wpa_s->pno_sched_pending) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - PNO is in progress");
+ return;
+ }
+
if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled");
return;
return;
}
+ if (wpa_s->scanning) {
+ /*
+ * If we are already in scanning state, we shall reschedule the
+ * the incoming scan request.
+ */
+ wpa_dbg(wpa_s, MSG_DEBUG, "Already scanning - 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);
-#ifdef CONFIG_P2P
- wpa_s->sta_scan_pending = 0;
-#endif /* CONFIG_P2P */
return;
}
return;
}
-#ifdef CONFIG_P2P
if (wpas_p2p_in_progress(wpa_s)) {
- 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;
- }
+ 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;
}
-#endif /* CONFIG_P2P */
if (wpa_s->conf->ap_scan == 2)
max_ssids = 1;
max_ssids = WPAS_MAX_SCAN_SSIDS;
}
- scan_req = wpa_s->scan_req;
+ wpa_s->last_scan_req = wpa_s->scan_req;
wpa_s->scan_req = NORMAL_SCAN_REQ;
os_memset(¶ms, 0, sizeof(params));
goto scan;
}
- if (scan_req != MANUAL_SCAN_REQ && wpa_s->connect_without_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;
#ifdef CONFIG_P2P
if ((wpa_s->p2p_in_provisioning || wpa_s->show_group_started) &&
wpa_s->go_params) {
- wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during "
- "P2P group formation");
+ 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.ssids[0].ssid = wpa_s->go_params->ssid;
params.ssids[0].ssid_len = wpa_s->go_params->ssid_len;
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 (scan_req != MANUAL_SCAN_REQ && wpa_s->conf->ap_scan == 2) {
+ if (wpa_s->last_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);
* 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 == NULL) {
+ wpa_dbg(wpa_s, MSG_ERROR, "Memory allocation failed");
+ return;
+ }
+ 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;
}
+ 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; tssid; tssid = tssid->next) {
if (wpas_network_disabled(wpa_s, tssid))
continue;
wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in "
"the scan request");
params.num_ssids++;
+ } 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 {
wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
params.num_ssids++;
wpa_supplicant_optimize_freqs(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)
- wpas_hs20_add_indication(extra_ie);
-#endif /* CONFIG_HS20 */
+ if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
+ wpa_s->manual_scan_only_new)
+ 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");
+ params.freqs = wpa_s->manual_scan_freqs;
+ wpa_s->manual_scan_freqs = NULL;
+ }
if (params.freqs == NULL && wpa_s->next_scan_freqs) {
wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously "
} else
os_free(wpa_s->next_scan_freqs);
wpa_s->next_scan_freqs = NULL;
+ wpa_setband_scan_freqs(wpa_s, ¶ms);
+
+ /* 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);
+ }
+
+ /* Use current associated channel? */
+ if (wpa_s->conf->scan_cur_freq && !params.freqs) {
+ unsigned int num = wpa_s->num_multichan_concurrent;
+
+ params.freqs = os_calloc(num + 1, sizeof(int));
+ if (params.freqs) {
+ num = get_shared_radio_freqs(wpa_s, params.freqs, num);
+ if (num > 0) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the "
+ "current operating channels since "
+ "scan_cur_freq is enabled");
+ } else {
+ os_free(params.freqs);
+ params.freqs = NULL;
+ }
+ }
+ }
params.filter_ssids = wpa_supplicant_build_filter_ssids(
wpa_s->conf, ¶ms.num_filter_ssids);
}
#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
* 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 &&
+ if (wpa_s->scan_for_connection &&
+ wpa_s->last_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;
+ unsigned int num = wpa_s->num_multichan_concurrent;
+
+ params.freqs = os_calloc(num + 1, sizeof(int));
+ if (params.freqs) {
+ num = get_shared_radio_freqs(wpa_s, params.freqs, num);
+ if (num > 0 && num == wpa_s->num_multichan_concurrent) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the current operating channels since all channels are already used");
+ } else {
+ os_free(params.freqs);
+ params.freqs = NULL;
+ }
}
}
#endif /* CONFIG_P2P */
ret = wpa_supplicant_trigger_scan(wpa_s, scan_params);
+ if (ret && wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs &&
+ !wpa_s->manual_scan_freqs) {
+ /* Restore manual_scan_freqs for the next attempt */
+ wpa_s->manual_scan_freqs = params.freqs;
+ params.freqs = NULL;
+ }
+
wpabuf_free(extra_ie);
os_free(params.freqs);
os_free(params.filter_ssids);
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_s->scan_req = wpa_s->last_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_reltime 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_reltime_before(&remaining, &new_int)) {
+ new_int.sec = remaining.sec;
+ new_int.usec = remaining.usec;
+ }
+
+ if (cancelled) {
+ eloop_register_timeout(new_int.sec, new_int.usec,
+ wpa_supplicant_scan, wpa_s, NULL);
+ }
+ wpa_s->scan_interval = sec;
+}
+
+
/**
* wpa_supplicant_req_scan - Schedule a scan for neighboring access points
* @wpa_s: Pointer to wpa_supplicant data
*/
void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec)
{
- /* If there's at least one network that should be specifically scanned
- * then don't cancel the scan and reschedule. Some drivers do
- * background scanning which generates frequent scan results, and that
- * causes the specific SSID scan to get continually pushed back and
- * never happen, which causes hidden APs to never get probe-scanned.
- */
- if (eloop_is_timeout_registered(wpa_supplicant_scan, wpa_s, NULL) &&
- wpa_s->conf->ap_scan == 1) {
- struct wpa_ssid *ssid = wpa_s->conf->ssid;
-
- while (ssid) {
- if (!wpas_network_disabled(wpa_s, ssid) &&
- ssid->scan_ssid)
- break;
- ssid = ssid->next;
- }
- if (ssid) {
- wpa_dbg(wpa_s, MSG_DEBUG, "Not rescheduling scan to "
- "ensure that specific SSID scans occur");
- return;
- }
+ int 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);
}
-
- 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);
}
* @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.
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;
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:
wpa_s->sched_scan_interval);
}
+ wpa_setband_scan_freqs(wpa_s, scan_params);
+
ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params,
wpa_s->sched_scan_interval);
wpabuf_free(extra_ie);
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;
+ wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;
+ }
}
+ /* If there is no more ssids, start next time from the beginning */
+ if (!ssid)
+ wpa_s->prev_sched_ssid = NULL;
+
return 0;
}
/**
+ * wpa_supplicant_cancel_delayed_sched_scan - Stop a delayed scheduled scan
+ * @wpa_s: Pointer to wpa_supplicant data
+ *
+ * This function is used to stop a delayed scheduled scan.
+ */
+void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant *wpa_s)
+{
+ if (!wpa_s->sched_scan_supported)
+ return;
+
+ wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling delayed sched scan");
+ eloop_cancel_timeout(wpa_supplicant_delayed_sched_scan_timeout,
+ wpa_s, NULL);
+}
+
+
+/**
* wpa_supplicant_cancel_sched_scan - Stop running scheduled scans
* @wpa_s: Pointer to wpa_supplicant data
*
}
+/**
+ * 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)
{
}
-struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res,
- u32 vendor_type)
+/**
+ * wpa_scan_get_vendor_ie_beacon - Fetch vendor information 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.
+ *
+ * This function is like wpa_scan_get_vendor_ie(), but uses IE buffer only
+ * from Beacon frames instead of either Beacon or Probe Response frames.
+ */
+const u8 * wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res *res,
+ u32 vendor_type)
{
- struct wpabuf *buf;
const u8 *end, *pos;
- buf = wpabuf_alloc(res->ie_len);
- if (buf == NULL)
+ if (res->beacon_ie_len == 0)
return NULL;
pos = (const u8 *) (res + 1);
- end = pos + res->ie_len;
+ 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);
+ return pos;
pos += 2 + pos[1];
}
- if (wpabuf_len(buf) == 0) {
- wpabuf_free(buf);
- buf = NULL;
- }
-
- return buf;
+ return NULL;
}
-struct wpabuf * wpa_scan_get_vendor_ie_multi_beacon(
- 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 *buf;
const u8 *end, *pos;
- if (res->beacon_ie_len == 0)
- return NULL;
- buf = wpabuf_alloc(res->beacon_ie_len);
+ buf = wpabuf_alloc(res->ie_len);
if (buf == NULL)
return NULL;
pos = (const u8 *) (res + 1);
- pos += res->ie_len;
- end = pos + res->beacon_ie_len;
+ end = pos + res->ie_len;
while (pos + 1 < end) {
if (pos + 2 + pos[1] > end)
== 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_reltime(&scan_res->fetch_time);
+ }
filter_scan_res(wpa_s, scan_res);
#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;
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");
+ if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
+ wpa_s->manual_scan_use_id && wpa_s->own_scan_running) {
+ wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS "id=%u",
+ wpa_s->manual_scan_id);
+ wpa_s->manual_scan_use_id = 0;
+ } else {
+ wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
+ }
+ 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);
+ }
+}
+
+
+int wpas_scan_scheduled(struct wpa_supplicant *wpa_s)
+{
+ 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;
+
+ 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);
+}
+
+
+int wpas_start_pno(struct wpa_supplicant *wpa_s)
+{
+ int ret, interval;
+ size_t i, num_ssid, num_match_ssid;
+ struct wpa_ssid *ssid;
+ struct wpa_driver_scan_params params;
+
+ if (!wpa_s->sched_scan_supported)
+ 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;
+ }
+ }
+
+ 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 > WPAS_MAX_SCAN_SSIDS) {
+ wpa_printf(MSG_DEBUG, "PNO: Use only the first %u SSIDs from "
+ "%u", WPAS_MAX_SCAN_SSIDS, (unsigned int) num_ssid);
+ num_ssid = WPAS_MAX_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;
+ ssid = wpa_s->conf->ssid;
+ 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;
+ }
+ ssid = ssid->next;
+ }
+
+ if (wpa_s->conf->filter_rssi)
+ params.filter_rssi = wpa_s->conf->filter_rssi;
+
+ interval = wpa_s->conf->sched_scan_interval ?
+ wpa_s->conf->sched_scan_interval : 10;
+
+ 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;
+ }
+
+ ret = wpa_supplicant_start_sched_scan(wpa_s, ¶ms, interval);
+ 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->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;
+}
projects / mech_eap.git / blobdiff