2008-02-28 02:34:43 +01:00
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/*
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* WPA Supplicant - Scanning
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2014-01-03 08:48:00 +01:00
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* Copyright (c) 2003-2014, Jouni Malinen <j@w1.fi>
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2008-02-28 02:34:43 +01:00
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*
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2012-02-11 15:46:35 +01:00
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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2008-02-28 02:34:43 +01:00
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*/
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2010-01-03 17:48:11 +01:00
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#include "utils/includes.h"
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2008-02-28 02:34:43 +01:00
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2010-01-03 17:48:11 +01:00
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#include "utils/common.h"
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#include "utils/eloop.h"
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#include "common/ieee802_11_defs.h"
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2013-02-07 17:06:51 +01:00
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#include "common/wpa_ctrl.h"
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2008-02-28 02:34:43 +01:00
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#include "config.h"
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#include "wpa_supplicant_i.h"
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2009-03-26 19:37:05 +01:00
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#include "driver_i.h"
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2008-11-29 12:38:03 +01:00
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#include "wps_supplicant.h"
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2010-07-18 23:30:25 +02:00
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#include "p2p_supplicant.h"
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#include "p2p/p2p.h"
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2011-09-08 19:52:23 +02:00
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#include "hs20_supplicant.h"
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2009-09-13 19:53:32 +02:00
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#include "notify.h"
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2010-01-03 17:48:11 +01:00
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#include "bss.h"
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#include "scan.h"
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2008-02-28 02:34:43 +01:00
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static void wpa_supplicant_gen_assoc_event(struct wpa_supplicant *wpa_s)
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{
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struct wpa_ssid *ssid;
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union wpa_event_data data;
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ssid = wpa_supplicant_get_ssid(wpa_s);
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if (ssid == NULL)
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return;
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2009-09-13 19:53:32 +02:00
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if (wpa_s->current_ssid == NULL) {
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2008-02-28 02:34:43 +01:00
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wpa_s->current_ssid = ssid;
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2009-09-13 19:53:32 +02:00
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if (wpa_s->current_ssid != NULL)
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wpas_notify_network_changed(wpa_s);
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}
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2008-02-28 02:34:43 +01:00
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wpa_supplicant_initiate_eapol(wpa_s);
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2011-02-10 19:14:46 +01:00
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wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with a configured "
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"network - generating associated event");
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2008-02-28 02:34:43 +01:00
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os_memset(&data, 0, sizeof(data));
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wpa_supplicant_event(wpa_s, EVENT_ASSOC, &data);
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}
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2008-11-23 18:34:26 +01:00
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#ifdef CONFIG_WPS
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2011-10-15 16:35:04 +02:00
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static int wpas_wps_in_use(struct wpa_supplicant *wpa_s,
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2009-01-03 18:50:49 +01:00
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enum wps_request_type *req_type)
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2008-11-23 18:34:26 +01:00
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{
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struct wpa_ssid *ssid;
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int wps = 0;
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2011-10-15 16:35:04 +02:00
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for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
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2008-11-23 18:34:26 +01:00
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if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
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continue;
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wps = 1;
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2008-11-29 12:38:03 +01:00
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*req_type = wpas_wps_get_req_type(ssid);
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2008-11-23 18:34:26 +01:00
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if (!ssid->eap.phase1)
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continue;
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if (os_strstr(ssid->eap.phase1, "pbc=1"))
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return 2;
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}
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2011-10-15 16:35:04 +02:00
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#ifdef CONFIG_P2P
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2012-10-10 12:08:23 +02:00
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if (!wpa_s->global->p2p_disabled && wpa_s->global->p2p &&
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!wpa_s->conf->p2p_disabled) {
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2012-01-27 20:09:34 +01:00
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wpa_s->wps->dev.p2p = 1;
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if (!wps) {
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wps = 1;
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*req_type = WPS_REQ_ENROLLEE_INFO;
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}
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2011-10-15 16:35:04 +02:00
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}
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#endif /* CONFIG_P2P */
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2008-11-23 18:34:26 +01:00
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return wps;
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}
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#endif /* CONFIG_WPS */
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2009-02-14 19:59:26 +01:00
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2012-12-27 11:29:05 +01:00
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/**
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* wpa_supplicant_enabled_networks - Check whether there are enabled networks
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* @wpa_s: Pointer to wpa_supplicant data
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* Returns: 0 if no networks are enabled, >0 if networks are enabled
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*
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* This function is used to figure out whether any networks (or Interworking
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* with enabled credentials and auto_interworking) are present in the current
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* configuration.
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*/
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2012-05-10 13:34:46 +02:00
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int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s)
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2009-02-14 19:59:26 +01:00
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{
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2012-05-10 13:34:46 +02:00
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struct wpa_ssid *ssid = wpa_s->conf->ssid;
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2012-09-24 00:04:00 +02:00
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int count = 0, disabled = 0;
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2009-02-14 19:59:26 +01:00
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while (ssid) {
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2012-05-10 13:34:46 +02:00
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if (!wpas_network_disabled(wpa_s, ssid))
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2010-11-26 10:23:50 +01:00
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count++;
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2012-09-24 00:04:00 +02:00
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else
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disabled++;
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2009-02-14 19:59:26 +01:00
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ssid = ssid->next;
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}
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2012-08-28 15:14:13 +02:00
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if (wpa_s->conf->cred && wpa_s->conf->interworking &&
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wpa_s->conf->auto_interworking)
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count++;
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2012-09-24 00:04:00 +02:00
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if (count == 0 && disabled > 0) {
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wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks (%d disabled "
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"networks)", disabled);
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}
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2010-11-26 10:23:50 +01:00
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return count;
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2009-02-14 19:59:26 +01:00
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}
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static void wpa_supplicant_assoc_try(struct wpa_supplicant *wpa_s,
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struct wpa_ssid *ssid)
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{
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while (ssid) {
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2012-05-10 13:34:46 +02:00
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if (!wpas_network_disabled(wpa_s, ssid))
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2009-02-14 19:59:26 +01:00
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break;
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ssid = ssid->next;
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}
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/* ap_scan=2 mode - try to associate with each SSID. */
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if (ssid == NULL) {
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2011-02-10 19:14:46 +01:00
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wpa_dbg(wpa_s, MSG_DEBUG, "wpa_supplicant_assoc_try: Reached "
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"end of scan list - go back to beginning");
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2009-02-14 21:21:17 +01:00
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wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
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2009-02-14 19:59:26 +01:00
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wpa_supplicant_req_scan(wpa_s, 0, 0);
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return;
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}
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if (ssid->next) {
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/* Continue from the next SSID on the next attempt. */
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wpa_s->prev_scan_ssid = ssid;
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} else {
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/* Start from the beginning of the SSID list. */
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2009-02-14 21:21:17 +01:00
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wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
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2009-02-14 19:59:26 +01:00
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}
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wpa_supplicant_associate(wpa_s, NULL, ssid);
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}
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2013-11-24 21:07:05 +01:00
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static void wpas_trigger_scan_cb(struct wpa_radio_work *work, int deinit)
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2009-09-14 23:08:24 +02:00
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{
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2013-11-24 21:07:05 +01:00
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struct wpa_supplicant *wpa_s = work->wpa_s;
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struct wpa_driver_scan_params *params = work->ctx;
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2009-09-14 23:08:24 +02:00
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int ret;
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2013-11-24 21:07:05 +01:00
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if (deinit) {
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2014-02-13 10:24:00 +01:00
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if (!work->started) {
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wpa_scan_free_params(params);
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return;
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}
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wpa_supplicant_notify_scanning(wpa_s, 0);
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wpas_notify_scan_done(wpa_s, 0);
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wpa_s->scan_work = NULL;
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2013-11-24 21:07:05 +01:00
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return;
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}
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2009-09-14 23:08:24 +02:00
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wpa_supplicant_notify_scanning(wpa_s, 1);
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2014-01-02 22:03:31 +01:00
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if (wpa_s->clear_driver_scan_cache)
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params->only_new_results = 1;
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2011-10-22 21:45:38 +02:00
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ret = wpa_drv_scan(wpa_s, params);
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2013-11-24 21:07:05 +01:00
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wpa_scan_free_params(params);
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work->ctx = NULL;
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2009-09-14 23:08:24 +02:00
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if (ret) {
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wpa_supplicant_notify_scanning(wpa_s, 0);
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wpas_notify_scan_done(wpa_s, 0);
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2013-11-24 21:07:05 +01:00
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radio_work_done(work);
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return;
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2011-11-28 17:36:36 +01:00
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}
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2009-09-14 23:08:24 +02:00
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2013-11-24 21:07:05 +01:00
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os_get_reltime(&wpa_s->scan_trigger_time);
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wpa_s->scan_runs++;
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wpa_s->normal_scans++;
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wpa_s->own_scan_requested = 1;
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wpa_s->clear_driver_scan_cache = 0;
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wpa_s->scan_work = work;
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}
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/**
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* wpa_supplicant_trigger_scan - Request driver to start a scan
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* @wpa_s: Pointer to wpa_supplicant data
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* @params: Scan parameters
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* Returns: 0 on success, -1 on failure
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*/
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int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s,
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struct wpa_driver_scan_params *params)
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{
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struct wpa_driver_scan_params *ctx;
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if (wpa_s->scan_work) {
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wpa_dbg(wpa_s, MSG_INFO, "Reject scan trigger since one is already pending");
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return -1;
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}
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ctx = wpa_scan_clone_params(params);
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if (ctx == NULL)
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return -1;
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if (radio_add_work(wpa_s, 0, "scan", 0, wpas_trigger_scan_cb, ctx) < 0)
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{
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wpa_scan_free_params(ctx);
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return -1;
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}
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return 0;
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2009-09-14 23:08:24 +02:00
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}
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2011-09-27 21:21:38 +02:00
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static void
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wpa_supplicant_delayed_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx)
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{
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struct wpa_supplicant *wpa_s = eloop_ctx;
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wpa_dbg(wpa_s, MSG_DEBUG, "Starting delayed sched scan");
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if (wpa_supplicant_req_sched_scan(wpa_s))
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wpa_supplicant_req_scan(wpa_s, 0, 0);
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}
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2011-09-27 21:21:29 +02:00
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static void
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wpa_supplicant_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx)
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{
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struct wpa_supplicant *wpa_s = eloop_ctx;
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wpa_dbg(wpa_s, MSG_DEBUG, "Sched scan timeout - stopping it");
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wpa_s->sched_scan_timed_out = 1;
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wpa_supplicant_cancel_sched_scan(wpa_s);
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}
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2013-10-17 08:26:02 +02:00
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int wpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s,
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struct wpa_driver_scan_params *params,
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int interval)
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2011-09-27 21:21:29 +02:00
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{
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int ret;
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wpa_supplicant_notify_scanning(wpa_s, 1);
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ret = wpa_drv_sched_scan(wpa_s, params, interval * 1000);
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if (ret)
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wpa_supplicant_notify_scanning(wpa_s, 0);
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else
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wpa_s->sched_scanning = 1;
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return ret;
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}
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2013-10-17 08:26:02 +02:00
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int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s)
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2011-09-27 21:21:29 +02:00
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{
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int ret;
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ret = wpa_drv_stop_sched_scan(wpa_s);
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if (ret) {
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wpa_dbg(wpa_s, MSG_DEBUG, "stopping sched_scan failed!");
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/* TODO: what to do if stopping fails? */
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return -1;
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}
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return ret;
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}
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2010-03-05 20:42:06 +01:00
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static struct wpa_driver_scan_filter *
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wpa_supplicant_build_filter_ssids(struct wpa_config *conf, size_t *num_ssids)
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{
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struct wpa_driver_scan_filter *ssids;
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struct wpa_ssid *ssid;
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size_t count;
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*num_ssids = 0;
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if (!conf->filter_ssids)
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return NULL;
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for (count = 0, ssid = conf->ssid; ssid; ssid = ssid->next) {
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if (ssid->ssid && ssid->ssid_len)
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count++;
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}
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if (count == 0)
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return NULL;
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ssids = os_zalloc(count * sizeof(struct wpa_driver_scan_filter));
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if (ssids == NULL)
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return NULL;
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for (ssid = conf->ssid; ssid; ssid = ssid->next) {
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if (!ssid->ssid || !ssid->ssid_len)
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continue;
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os_memcpy(ssids[*num_ssids].ssid, ssid->ssid, ssid->ssid_len);
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ssids[*num_ssids].ssid_len = ssid->ssid_len;
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(*num_ssids)++;
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}
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return ssids;
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}
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2011-10-15 16:35:04 +02:00
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static void wpa_supplicant_optimize_freqs(
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struct wpa_supplicant *wpa_s, struct wpa_driver_scan_params *params)
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{
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#ifdef CONFIG_P2P
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if (params->freqs == NULL && wpa_s->p2p_in_provisioning &&
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wpa_s->go_params) {
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|
|
/* Optimize provisioning state scan based on GO information */
|
|
|
|
if (wpa_s->p2p_in_provisioning < 5 &&
|
|
|
|
wpa_s->go_params->freq > 0) {
|
|
|
|
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));
|
|
|
|
if (params->freqs)
|
|
|
|
params->freqs[0] = wpa_s->go_params->freq;
|
|
|
|
} else if (wpa_s->p2p_in_provisioning < 8 &&
|
|
|
|
wpa_s->go_params->freq_list[0]) {
|
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only common "
|
|
|
|
"channels");
|
|
|
|
int_array_concat(¶ms->freqs,
|
|
|
|
wpa_s->go_params->freq_list);
|
|
|
|
if (params->freqs)
|
|
|
|
int_array_sort_unique(params->freqs);
|
|
|
|
}
|
|
|
|
wpa_s->p2p_in_provisioning++;
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_P2P */
|
|
|
|
|
|
|
|
#ifdef CONFIG_WPS
|
|
|
|
if (params->freqs == NULL && wpa_s->after_wps && wpa_s->wps_freq) {
|
|
|
|
/*
|
|
|
|
* Optimize post-provisioning scan based on channel used
|
|
|
|
* during provisioning.
|
|
|
|
*/
|
|
|
|
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));
|
|
|
|
if (params->freqs)
|
|
|
|
params->freqs[0] = wpa_s->wps_freq;
|
|
|
|
wpa_s->after_wps--;
|
2013-11-28 11:56:21 +01:00
|
|
|
} else if (wpa_s->after_wps)
|
|
|
|
wpa_s->after_wps--;
|
2011-10-15 16:35:04 +02:00
|
|
|
|
2011-12-31 12:17:20 +01:00
|
|
|
if (params->freqs == NULL && wpa_s->known_wps_freq && wpa_s->wps_freq)
|
|
|
|
{
|
|
|
|
/* 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));
|
|
|
|
if (params->freqs)
|
|
|
|
params->freqs[0] = wpa_s->wps_freq;
|
|
|
|
wpa_s->known_wps_freq = 0; /* only do this once */
|
|
|
|
}
|
2011-10-15 16:35:04 +02:00
|
|
|
#endif /* CONFIG_WPS */
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-09-27 22:15:05 +02:00
|
|
|
#ifdef CONFIG_INTERWORKING
|
|
|
|
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);
|
2012-11-02 12:05:57 +01:00
|
|
|
wpabuf_put_u8(buf, 6);
|
2011-09-27 22:15:05 +02:00
|
|
|
wpabuf_put_u8(buf, 0x00);
|
|
|
|
wpabuf_put_u8(buf, 0x00);
|
|
|
|
wpabuf_put_u8(buf, 0x00);
|
|
|
|
wpabuf_put_u8(buf, 0x80); /* Bit 31 - Interworking */
|
2012-11-02 12:05:57 +01:00
|
|
|
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 */
|
2011-09-27 22:15:05 +02:00
|
|
|
|
|
|
|
wpabuf_put_u8(buf, WLAN_EID_INTERWORKING);
|
|
|
|
wpabuf_put_u8(buf, is_zero_ether_addr(wpa_s->conf->hessid) ? 1 :
|
|
|
|
1 + ETH_ALEN);
|
2011-10-21 11:44:29 +02:00
|
|
|
wpabuf_put_u8(buf, wpa_s->conf->access_network_type);
|
2011-09-27 22:15:05 +02:00
|
|
|
/* No Venue Info */
|
|
|
|
if (!is_zero_ether_addr(wpa_s->conf->hessid))
|
|
|
|
wpabuf_put_data(buf, wpa_s->conf->hessid, ETH_ALEN);
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_INTERWORKING */
|
|
|
|
|
|
|
|
|
2012-08-13 20:48:55 +02:00
|
|
|
static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s)
|
2008-02-28 02:34:43 +01:00
|
|
|
{
|
2011-09-27 22:15:05 +02:00
|
|
|
struct wpabuf *extra_ie = NULL;
|
2008-11-29 12:38:03 +01:00
|
|
|
#ifdef CONFIG_WPS
|
2010-08-20 08:44:50 +02:00
|
|
|
int wps = 0;
|
2009-01-03 18:50:49 +01:00
|
|
|
enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO;
|
2011-09-27 22:15:05 +02:00
|
|
|
#endif /* CONFIG_WPS */
|
|
|
|
|
|
|
|
#ifdef CONFIG_INTERWORKING
|
|
|
|
if (wpa_s->conf->interworking &&
|
|
|
|
wpabuf_resize(&extra_ie, 100) == 0)
|
|
|
|
wpas_add_interworking_elements(wpa_s, extra_ie);
|
|
|
|
#endif /* CONFIG_INTERWORKING */
|
2011-10-15 16:35:04 +02:00
|
|
|
|
2011-09-27 22:15:05 +02:00
|
|
|
#ifdef CONFIG_WPS
|
2011-10-15 16:35:04 +02:00
|
|
|
wps = wpas_wps_in_use(wpa_s, &req_type);
|
|
|
|
|
|
|
|
if (wps) {
|
2011-09-27 22:15:05 +02:00
|
|
|
struct wpabuf *wps_ie;
|
2012-02-27 22:14:35 +01:00
|
|
|
wps_ie = wps_build_probe_req_ie(wps == 2 ? DEV_PW_PUSHBUTTON :
|
|
|
|
DEV_PW_DEFAULT,
|
|
|
|
&wpa_s->wps->dev,
|
2011-10-15 16:35:04 +02:00
|
|
|
wpa_s->wps->uuid, req_type,
|
|
|
|
0, NULL);
|
|
|
|
if (wps_ie) {
|
2011-09-27 22:15:05 +02:00
|
|
|
if (wpabuf_resize(&extra_ie, wpabuf_len(wps_ie)) == 0)
|
|
|
|
wpabuf_put_buf(extra_ie, wps_ie);
|
|
|
|
wpabuf_free(wps_ie);
|
2011-10-15 16:35:04 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_P2P
|
2011-09-27 22:15:05 +02:00
|
|
|
if (wps) {
|
2011-10-15 16:35:04 +02:00
|
|
|
size_t ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p);
|
2011-09-27 22:15:05 +02:00
|
|
|
if (wpabuf_resize(&extra_ie, ielen) == 0)
|
|
|
|
wpas_p2p_scan_ie(wpa_s, extra_ie);
|
2011-10-15 16:35:04 +02:00
|
|
|
}
|
|
|
|
#endif /* CONFIG_P2P */
|
|
|
|
|
2008-11-29 12:38:03 +01:00
|
|
|
#endif /* CONFIG_WPS */
|
2011-10-15 16:35:04 +02:00
|
|
|
|
2013-05-04 10:57:56 +02:00
|
|
|
#ifdef CONFIG_HS20
|
|
|
|
if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 7) == 0)
|
2012-11-02 11:08:11 +01:00
|
|
|
wpas_hs20_add_indication(extra_ie, -1);
|
2013-05-04 10:57:56 +02:00
|
|
|
#endif /* CONFIG_HS20 */
|
|
|
|
|
2011-09-27 22:15:05 +02:00
|
|
|
return extra_ie;
|
2011-10-15 16:35:04 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2012-11-25 11:47:43 +01:00
|
|
|
#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;
|
|
|
|
}
|
|
|
|
|
2013-05-09 11:43:40 +02:00
|
|
|
#endif /* CONFIG_P2P */
|
2012-11-25 11:47:43 +01:00
|
|
|
|
|
|
|
|
2012-03-09 06:28:13 +01:00
|
|
|
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)
|
|
|
|
{
|
|
|
|
/* 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;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-10-15 16:35:04 +02:00
|
|
|
static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx)
|
|
|
|
{
|
|
|
|
struct wpa_supplicant *wpa_s = eloop_ctx;
|
|
|
|
struct wpa_ssid *ssid;
|
2012-11-25 14:55:32 +01:00
|
|
|
int ret;
|
2012-07-03 19:54:40 +02:00
|
|
|
struct wpabuf *extra_ie = NULL;
|
2009-02-14 19:59:26 +01:00
|
|
|
struct wpa_driver_scan_params params;
|
2012-06-26 17:55:41 +02:00
|
|
|
struct wpa_driver_scan_params *scan_params;
|
2009-02-14 19:59:26 +01:00
|
|
|
size_t max_ssids;
|
2010-02-27 17:46:02 +01:00
|
|
|
enum wpa_states prev_state;
|
2008-02-28 02:34:43 +01:00
|
|
|
|
2014-01-22 15:15:23 +01:00
|
|
|
if (wpa_s->pno || wpa_s->pno_sched_pending) {
|
2014-01-18 15:46:24 +01:00
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - PNO is in progress");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2010-05-23 09:27:32 +02:00
|
|
|
if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
|
2011-02-10 19:14:46 +01:00
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled");
|
2010-05-23 09:27:32 +02:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2012-11-25 14:55:32 +01:00
|
|
|
if (wpa_s->disconnected && wpa_s->scan_req == NORMAL_SCAN_REQ) {
|
2012-09-24 00:05:51 +02:00
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Disconnected - do not scan");
|
2009-09-14 16:25:03 +02:00
|
|
|
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
|
2008-02-28 02:34:43 +01:00
|
|
|
return;
|
2009-09-14 16:25:03 +02:00
|
|
|
}
|
2008-02-28 02:34:43 +01:00
|
|
|
|
2013-10-17 08:26:02 +02:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2012-05-10 13:34:46 +02:00
|
|
|
if (!wpa_supplicant_enabled_networks(wpa_s) &&
|
2012-11-25 14:55:32 +01:00
|
|
|
wpa_s->scan_req == NORMAL_SCAN_REQ) {
|
2011-02-10 19:14:46 +01:00
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan");
|
2008-02-28 02:34:43 +01:00
|
|
|
wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2009-03-20 21:26:41 +01:00
|
|
|
if (wpa_s->conf->ap_scan != 0 &&
|
|
|
|
(wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) {
|
2011-02-10 19:14:46 +01:00
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - "
|
|
|
|
"overriding ap_scan configuration");
|
2008-02-28 02:34:43 +01:00
|
|
|
wpa_s->conf->ap_scan = 0;
|
2009-09-13 19:53:32 +02:00
|
|
|
wpas_notify_ap_scan_changed(wpa_s);
|
2008-02-28 02:34:43 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
if (wpa_s->conf->ap_scan == 0) {
|
|
|
|
wpa_supplicant_gen_assoc_event(wpa_s);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2011-09-29 15:53:55 +02:00
|
|
|
#ifdef CONFIG_P2P
|
2014-01-03 15:57:01 +01:00
|
|
|
if (wpas_p2p_in_progress(wpa_s)) {
|
2014-01-03 10:57:57 +01:00
|
|
|
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;
|
2011-09-29 15:53:55 +02:00
|
|
|
}
|
|
|
|
#endif /* CONFIG_P2P */
|
|
|
|
|
2011-10-22 21:45:38 +02:00
|
|
|
if (wpa_s->conf->ap_scan == 2)
|
2009-02-14 19:59:26 +01:00
|
|
|
max_ssids = 1;
|
|
|
|
else {
|
|
|
|
max_ssids = wpa_s->max_scan_ssids;
|
|
|
|
if (max_ssids > WPAS_MAX_SCAN_SSIDS)
|
|
|
|
max_ssids = WPAS_MAX_SCAN_SSIDS;
|
|
|
|
}
|
|
|
|
|
2013-05-31 12:15:56 +02:00
|
|
|
wpa_s->last_scan_req = wpa_s->scan_req;
|
2012-11-25 14:55:32 +01:00
|
|
|
wpa_s->scan_req = NORMAL_SCAN_REQ;
|
2009-02-14 19:59:26 +01:00
|
|
|
|
|
|
|
os_memset(¶ms, 0, sizeof(params));
|
|
|
|
|
2010-02-27 17:46:02 +01:00
|
|
|
prev_state = wpa_s->wpa_state;
|
2008-02-28 02:34:43 +01:00
|
|
|
if (wpa_s->wpa_state == WPA_DISCONNECTED ||
|
|
|
|
wpa_s->wpa_state == WPA_INACTIVE)
|
|
|
|
wpa_supplicant_set_state(wpa_s, WPA_SCANNING);
|
|
|
|
|
2012-06-26 17:55:41 +02:00
|
|
|
/*
|
|
|
|
* If autoscan has set its own scanning parameters
|
|
|
|
*/
|
|
|
|
if (wpa_s->autoscan_params != NULL) {
|
|
|
|
scan_params = wpa_s->autoscan_params;
|
|
|
|
goto scan;
|
|
|
|
}
|
|
|
|
|
2013-05-31 12:15:56 +02:00
|
|
|
if (wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
|
|
|
|
wpa_s->connect_without_scan) {
|
2011-06-21 10:47:03 +02:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-02-28 23:02:34 +01:00
|
|
|
#ifdef CONFIG_P2P
|
2012-02-28 23:34:53 +01:00
|
|
|
if ((wpa_s->p2p_in_provisioning || wpa_s->show_group_started) &&
|
|
|
|
wpa_s->go_params) {
|
2013-11-01 09:30:50 +01:00
|
|
|
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);
|
2012-02-28 23:02:34 +01:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_P2P */
|
|
|
|
|
2009-02-14 19:59:26 +01:00
|
|
|
/* Find the starting point from which to continue scanning */
|
2008-02-28 02:34:43 +01:00
|
|
|
ssid = wpa_s->conf->ssid;
|
2009-02-14 21:21:17 +01:00
|
|
|
if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) {
|
2008-02-28 02:34:43 +01:00
|
|
|
while (ssid) {
|
|
|
|
if (ssid == wpa_s->prev_scan_ssid) {
|
|
|
|
ssid = ssid->next;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
ssid = ssid->next;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-05-31 12:15:56 +02:00
|
|
|
if (wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
|
|
|
|
wpa_s->conf->ap_scan == 2) {
|
2011-06-21 10:47:03 +02:00
|
|
|
wpa_s->connect_without_scan = NULL;
|
2012-01-29 16:39:08 +01:00
|
|
|
wpa_s->prev_scan_wildcard = 0;
|
2009-02-14 19:59:26 +01:00
|
|
|
wpa_supplicant_assoc_try(wpa_s, ssid);
|
|
|
|
return;
|
|
|
|
} else if (wpa_s->conf->ap_scan == 2) {
|
2008-02-28 02:34:43 +01:00
|
|
|
/*
|
2009-02-14 21:21:17 +01:00
|
|
|
* User-initiated scan request in ap_scan == 2; scan with
|
|
|
|
* wildcard SSID.
|
2008-02-28 02:34:43 +01:00
|
|
|
*/
|
2009-02-14 19:59:26 +01:00
|
|
|
ssid = NULL;
|
2014-03-06 19:06:04 +01:00
|
|
|
} 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;
|
2009-02-14 19:59:26 +01:00
|
|
|
} else {
|
2009-11-10 17:00:57 +01:00
|
|
|
struct wpa_ssid *start = ssid, *tssid;
|
2009-03-26 20:55:01 +01:00
|
|
|
int freqs_set = 0;
|
2009-02-14 19:59:26 +01:00
|
|
|
if (ssid == NULL && max_ssids > 1)
|
|
|
|
ssid = wpa_s->conf->ssid;
|
|
|
|
while (ssid) {
|
2012-05-10 13:34:46 +02:00
|
|
|
if (!wpas_network_disabled(wpa_s, ssid) &&
|
|
|
|
ssid->scan_ssid) {
|
2009-02-14 19:59:26 +01:00
|
|
|
wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",
|
|
|
|
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++;
|
|
|
|
if (params.num_ssids + 1 >= max_ssids)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
ssid = ssid->next;
|
|
|
|
if (ssid == start)
|
|
|
|
break;
|
|
|
|
if (ssid == NULL && max_ssids > 1 &&
|
|
|
|
start != wpa_s->conf->ssid)
|
|
|
|
ssid = wpa_s->conf->ssid;
|
2008-02-28 02:34:43 +01:00
|
|
|
}
|
2009-03-26 20:55:01 +01:00
|
|
|
|
2009-11-10 17:00:57 +01:00
|
|
|
for (tssid = wpa_s->conf->ssid; tssid; tssid = tssid->next) {
|
2012-05-10 13:34:46 +02:00
|
|
|
if (wpas_network_disabled(wpa_s, tssid))
|
2009-03-26 20:55:01 +01:00
|
|
|
continue;
|
2009-11-10 17:00:57 +01:00
|
|
|
if ((params.freqs || !freqs_set) && tssid->scan_freq) {
|
2009-03-26 20:55:01 +01:00
|
|
|
int_array_concat(¶ms.freqs,
|
2009-11-10 17:00:57 +01:00
|
|
|
tssid->scan_freq);
|
2009-03-26 20:55:01 +01:00
|
|
|
} else {
|
|
|
|
os_free(params.freqs);
|
|
|
|
params.freqs = NULL;
|
|
|
|
}
|
|
|
|
freqs_set = 1;
|
|
|
|
}
|
|
|
|
int_array_sort_unique(params.freqs);
|
2008-02-28 02:34:43 +01:00
|
|
|
}
|
|
|
|
|
2012-01-29 16:39:08 +01:00
|
|
|
if (ssid && max_ssids == 1) {
|
|
|
|
/*
|
|
|
|
* If the driver is limited to 1 SSID at a time interleave
|
|
|
|
* wildcard SSID scans with specific SSID scans to avoid
|
|
|
|
* waiting a long time for a wildcard scan.
|
|
|
|
*/
|
|
|
|
if (!wpa_s->prev_scan_wildcard) {
|
|
|
|
params.ssids[0].ssid = NULL;
|
|
|
|
params.ssids[0].ssid_len = 0;
|
|
|
|
wpa_s->prev_scan_wildcard = 1;
|
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for "
|
|
|
|
"wildcard SSID (Interleave with specific)");
|
|
|
|
} else {
|
|
|
|
wpa_s->prev_scan_ssid = ssid;
|
|
|
|
wpa_s->prev_scan_wildcard = 0;
|
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG,
|
|
|
|
"Starting AP scan for specific SSID: %s",
|
|
|
|
wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
|
2009-02-14 19:59:26 +01:00
|
|
|
}
|
2012-01-29 16:39:08 +01:00
|
|
|
} else if (ssid) {
|
|
|
|
/* max_ssids > 1 */
|
|
|
|
|
|
|
|
wpa_s->prev_scan_ssid = ssid;
|
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in "
|
|
|
|
"the scan request");
|
|
|
|
params.num_ssids++;
|
2013-12-26 15:52:55 +01:00
|
|
|
} 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");
|
2009-02-14 19:59:26 +01:00
|
|
|
} else {
|
2009-02-14 21:21:17 +01:00
|
|
|
wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
|
2009-02-14 19:59:26 +01:00
|
|
|
params.num_ssids++;
|
2011-02-10 19:14:46 +01:00
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard "
|
|
|
|
"SSID");
|
2008-02-28 02:34:43 +01:00
|
|
|
}
|
2012-02-28 23:02:34 +01:00
|
|
|
#ifdef CONFIG_P2P
|
|
|
|
ssid_list_set:
|
|
|
|
#endif /* CONFIG_P2P */
|
2008-02-28 02:34:43 +01:00
|
|
|
|
2011-10-15 16:35:04 +02:00
|
|
|
wpa_supplicant_optimize_freqs(wpa_s, ¶ms);
|
2012-08-13 20:48:55 +02:00
|
|
|
extra_ie = wpa_supplicant_extra_ies(wpa_s);
|
2010-07-18 23:30:25 +02:00
|
|
|
|
2014-01-02 22:03:31 +01:00
|
|
|
if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
|
|
|
|
wpa_s->manual_scan_only_new)
|
|
|
|
params.only_new_results = 1;
|
|
|
|
|
2013-12-25 19:04:52 +01:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2010-11-25 21:51:56 +01:00
|
|
|
if (params.freqs == NULL && wpa_s->next_scan_freqs) {
|
2011-02-10 19:14:46 +01:00
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously "
|
|
|
|
"generated frequency list");
|
2010-11-25 21:51:56 +01:00
|
|
|
params.freqs = wpa_s->next_scan_freqs;
|
|
|
|
} else
|
|
|
|
os_free(wpa_s->next_scan_freqs);
|
|
|
|
wpa_s->next_scan_freqs = NULL;
|
2012-03-09 06:28:13 +01:00
|
|
|
wpa_setband_scan_freqs(wpa_s, ¶ms);
|
2010-11-25 21:51:56 +01:00
|
|
|
|
2013-05-05 10:46:54 +02:00
|
|
|
/* 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);
|
|
|
|
}
|
|
|
|
|
2013-05-09 11:43:40 +02:00
|
|
|
/* Use current associated channel? */
|
|
|
|
if (wpa_s->conf->scan_cur_freq && !params.freqs) {
|
2013-07-21 19:03:53 +02:00
|
|
|
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;
|
|
|
|
}
|
2013-05-09 11:43:40 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-03-05 20:42:06 +01:00
|
|
|
params.filter_ssids = wpa_supplicant_build_filter_ssids(
|
|
|
|
wpa_s->conf, ¶ms.num_filter_ssids);
|
2011-09-27 22:15:05 +02:00
|
|
|
if (extra_ie) {
|
|
|
|
params.extra_ies = wpabuf_head(extra_ie);
|
|
|
|
params.extra_ies_len = wpabuf_len(extra_ie);
|
|
|
|
}
|
2010-03-05 20:42:06 +01:00
|
|
|
|
2011-10-29 22:02:47 +02:00
|
|
|
#ifdef CONFIG_P2P
|
2012-02-28 23:34:53 +01:00
|
|
|
if (wpa_s->p2p_in_provisioning ||
|
|
|
|
(wpa_s->show_group_started && wpa_s->go_params)) {
|
2011-10-29 22:02:47 +02:00
|
|
|
/*
|
|
|
|
* The interface may not yet be in P2P mode, so we have to
|
|
|
|
* explicitly request P2P probe to disable CCK rates.
|
|
|
|
*/
|
|
|
|
params.p2p_probe = 1;
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_P2P */
|
|
|
|
|
2012-06-26 17:55:41 +02:00
|
|
|
scan_params = ¶ms;
|
|
|
|
|
|
|
|
scan:
|
2012-11-25 11:47:43 +01:00
|
|
|
#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.
|
|
|
|
*/
|
2013-05-31 12:15:56 +02:00
|
|
|
if (wpa_s->scan_for_connection &&
|
|
|
|
wpa_s->last_scan_req == NORMAL_SCAN_REQ &&
|
2012-11-25 11:47:43 +01:00
|
|
|
!scan_params->freqs && !params.freqs &&
|
|
|
|
wpas_is_p2p_prioritized(wpa_s) &&
|
|
|
|
wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE &&
|
|
|
|
non_p2p_network_enabled(wpa_s)) {
|
2013-07-21 19:03:53 +02:00
|
|
|
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;
|
|
|
|
}
|
2012-11-25 11:47:43 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_P2P */
|
|
|
|
|
2012-06-26 17:55:41 +02:00
|
|
|
ret = wpa_supplicant_trigger_scan(wpa_s, scan_params);
|
2008-02-28 02:34:43 +01:00
|
|
|
|
2013-12-25 19:04:52 +01:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2011-09-27 22:15:05 +02:00
|
|
|
wpabuf_free(extra_ie);
|
2009-03-26 20:55:01 +01:00
|
|
|
os_free(params.freqs);
|
2010-03-05 20:42:06 +01:00
|
|
|
os_free(params.filter_ssids);
|
2008-11-23 18:34:26 +01:00
|
|
|
|
2008-02-28 02:34:43 +01:00
|
|
|
if (ret) {
|
2011-02-10 19:14:46 +01:00
|
|
|
wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan");
|
2010-02-27 17:46:02 +01:00
|
|
|
if (prev_state != wpa_s->wpa_state)
|
|
|
|
wpa_supplicant_set_state(wpa_s, prev_state);
|
2012-10-30 11:27:05 +01:00
|
|
|
/* Restore scan_req since we will try to scan again */
|
2013-05-31 12:15:56 +02:00
|
|
|
wpa_s->scan_req = wpa_s->last_scan_req;
|
2010-04-11 18:56:23 +02:00
|
|
|
wpa_supplicant_req_scan(wpa_s, 1, 0);
|
2012-11-25 11:47:43 +01:00
|
|
|
} else {
|
|
|
|
wpa_s->scan_for_connection = 0;
|
2010-06-11 20:15:16 +02:00
|
|
|
}
|
2008-02-28 02:34:43 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2013-02-03 17:14:05 +01:00
|
|
|
void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec)
|
|
|
|
{
|
2013-11-20 11:01:09 +01:00
|
|
|
struct os_reltime remaining, new_int;
|
2013-02-03 17:14:05 +01:00
|
|
|
int cancelled;
|
|
|
|
|
|
|
|
cancelled = eloop_cancel_timeout_one(wpa_supplicant_scan, wpa_s, NULL,
|
|
|
|
&remaining);
|
|
|
|
|
|
|
|
new_int.sec = sec;
|
|
|
|
new_int.usec = 0;
|
2013-11-20 11:01:09 +01:00
|
|
|
if (cancelled && os_reltime_before(&remaining, &new_int)) {
|
2013-02-03 17:14:05 +01:00
|
|
|
new_int.sec = remaining.sec;
|
|
|
|
new_int.usec = remaining.usec;
|
|
|
|
}
|
|
|
|
|
2013-10-22 14:57:21 +02:00
|
|
|
if (cancelled) {
|
|
|
|
eloop_register_timeout(new_int.sec, new_int.usec,
|
|
|
|
wpa_supplicant_scan, wpa_s, NULL);
|
|
|
|
}
|
2013-02-03 17:14:05 +01:00
|
|
|
wpa_s->scan_interval = sec;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2008-02-28 02:34:43 +01:00
|
|
|
/**
|
|
|
|
* wpa_supplicant_req_scan - Schedule a scan for neighboring access points
|
|
|
|
* @wpa_s: Pointer to wpa_supplicant data
|
|
|
|
* @sec: Number of seconds after which to scan
|
|
|
|
* @usec: Number of microseconds after which to scan
|
|
|
|
*
|
|
|
|
* This function is used to schedule a scan for neighboring access points after
|
|
|
|
* the specified time.
|
|
|
|
*/
|
|
|
|
void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec)
|
|
|
|
{
|
2014-01-05 08:59:38 +01:00
|
|
|
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",
|
2013-11-11 20:13:17 +01:00
|
|
|
sec, usec);
|
2014-01-05 08:59:38 +01:00
|
|
|
} 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);
|
2013-11-11 20:13:17 +01:00
|
|
|
}
|
2008-02-28 02:34:43 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-09-27 21:21:38 +02:00
|
|
|
/**
|
|
|
|
* wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan
|
|
|
|
* @wpa_s: Pointer to wpa_supplicant data
|
|
|
|
* @sec: Number of seconds after which to scan
|
|
|
|
* @usec: Number of microseconds after which to scan
|
2012-12-27 11:29:05 +01:00
|
|
|
* Returns: 0 on success or -1 otherwise
|
2011-09-27 21:21:38 +02:00
|
|
|
*
|
|
|
|
* This function is used to schedule periodic scans for neighboring
|
|
|
|
* access points after the specified time.
|
|
|
|
*/
|
|
|
|
int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s,
|
|
|
|
int sec, int usec)
|
|
|
|
{
|
|
|
|
if (!wpa_s->sched_scan_supported)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
eloop_register_timeout(sec, usec,
|
|
|
|
wpa_supplicant_delayed_sched_scan_timeout,
|
|
|
|
wpa_s, NULL);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-09-27 21:21:29 +02:00
|
|
|
/**
|
|
|
|
* wpa_supplicant_req_sched_scan - Start a periodic scheduled scan
|
|
|
|
* @wpa_s: Pointer to wpa_supplicant data
|
2012-12-27 11:29:05 +01:00
|
|
|
* Returns: 0 is sched_scan was started or -1 otherwise
|
2011-09-27 21:21:29 +02:00
|
|
|
*
|
|
|
|
* This function is used to schedule periodic scans for neighboring
|
|
|
|
* access points repeating the scan continuously.
|
|
|
|
*/
|
|
|
|
int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s)
|
|
|
|
{
|
|
|
|
struct wpa_driver_scan_params params;
|
2012-06-26 17:55:41 +02:00
|
|
|
struct wpa_driver_scan_params *scan_params;
|
2011-09-27 21:21:29 +02:00
|
|
|
enum wpa_states prev_state;
|
2012-06-26 17:55:41 +02:00
|
|
|
struct wpa_ssid *ssid = NULL;
|
2012-08-13 20:48:55 +02:00
|
|
|
struct wpabuf *extra_ie = NULL;
|
2011-09-27 21:21:29 +02:00
|
|
|
int ret;
|
|
|
|
unsigned int max_sched_scan_ssids;
|
2011-11-28 17:12:38 +01:00
|
|
|
int wildcard = 0;
|
2011-11-28 17:36:36 +01:00
|
|
|
int need_ssids;
|
2011-09-27 21:21:29 +02:00
|
|
|
|
|
|
|
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;
|
2012-04-17 15:30:15 +02:00
|
|
|
if (max_sched_scan_ssids < 1 || wpa_s->conf->disable_scan_offload)
|
2011-11-28 17:12:38 +01:00
|
|
|
return -1;
|
2011-09-27 21:21:29 +02:00
|
|
|
|
2011-11-18 22:05:57 +01:00
|
|
|
if (wpa_s->sched_scanning) {
|
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Already sched scanning");
|
2011-09-27 21:21:29 +02:00
|
|
|
return 0;
|
2011-11-18 22:05:57 +01:00
|
|
|
}
|
2011-09-27 21:21:29 +02:00
|
|
|
|
2011-11-28 17:36:36 +01:00
|
|
|
need_ssids = 0;
|
|
|
|
for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
|
2012-05-10 13:34:46 +02:00
|
|
|
if (!wpas_network_disabled(wpa_s, ssid) && !ssid->scan_ssid) {
|
2011-11-28 17:36:36 +01:00
|
|
|
/* Use wildcard SSID to find this network */
|
|
|
|
wildcard = 1;
|
2012-05-10 13:34:46 +02:00
|
|
|
} else if (!wpas_network_disabled(wpa_s, ssid) &&
|
|
|
|
ssid->ssid_len)
|
2011-11-28 17:36:36 +01:00
|
|
|
need_ssids++;
|
2012-02-15 19:39:54 +01:00
|
|
|
|
|
|
|
#ifdef CONFIG_WPS
|
2012-05-10 13:34:46 +02:00
|
|
|
if (!wpas_network_disabled(wpa_s, ssid) &&
|
2012-05-07 12:39:33 +02:00
|
|
|
ssid->key_mgmt == WPA_KEY_MGMT_WPS) {
|
2012-02-15 19:39:54 +01:00
|
|
|
/*
|
|
|
|
* Normal scan is more reliable and faster for WPS
|
|
|
|
* operations and since these are for short periods of
|
|
|
|
* time, the benefit of trying to use sched_scan would
|
|
|
|
* be limited.
|
|
|
|
*/
|
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of "
|
|
|
|
"sched_scan for WPS");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_WPS */
|
2011-11-28 17:36:36 +01:00
|
|
|
}
|
|
|
|
if (wildcard)
|
|
|
|
need_ssids++;
|
|
|
|
|
|
|
|
if (wpa_s->normal_scans < 3 &&
|
|
|
|
(need_ssids <= wpa_s->max_scan_ssids ||
|
|
|
|
wpa_s->max_scan_ssids >= (int) max_sched_scan_ssids)) {
|
|
|
|
/*
|
|
|
|
* When normal scan can speed up operations, use that for the
|
|
|
|
* first operations before starting the sched_scan to allow
|
|
|
|
* user space sleep more. We do this only if the normal scan
|
|
|
|
* has functionality that is suitable for this or if the
|
|
|
|
* sched_scan does not have better support for multiple SSIDs.
|
|
|
|
*/
|
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of "
|
|
|
|
"sched_scan for initial scans (normal_scans=%d)",
|
|
|
|
wpa_s->normal_scans);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2011-09-27 21:21:29 +02:00
|
|
|
os_memset(¶ms, 0, sizeof(params));
|
|
|
|
|
2011-09-27 21:21:35 +02:00
|
|
|
/* If we can't allocate space for the filters, we just don't filter */
|
|
|
|
params.filter_ssids = os_zalloc(wpa_s->max_match_sets *
|
|
|
|
sizeof(struct wpa_driver_scan_filter));
|
|
|
|
|
2011-09-27 21:21:29 +02:00
|
|
|
prev_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);
|
|
|
|
|
2012-06-26 17:55:41 +02:00
|
|
|
if (wpa_s->autoscan_params != NULL) {
|
|
|
|
scan_params = wpa_s->autoscan_params;
|
|
|
|
goto scan;
|
|
|
|
}
|
|
|
|
|
2011-09-27 21:21:29 +02:00
|
|
|
/* Find the starting point from which to continue scanning */
|
|
|
|
ssid = wpa_s->conf->ssid;
|
|
|
|
if (wpa_s->prev_sched_ssid) {
|
|
|
|
while (ssid) {
|
|
|
|
if (ssid == wpa_s->prev_sched_ssid) {
|
|
|
|
ssid = ssid->next;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
ssid = ssid->next;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!ssid || !wpa_s->prev_sched_ssid) {
|
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Beginning of SSID list");
|
2013-05-07 11:41:14 +02:00
|
|
|
if (wpa_s->conf->sched_scan_interval)
|
|
|
|
wpa_s->sched_scan_interval =
|
|
|
|
wpa_s->conf->sched_scan_interval;
|
2012-06-26 17:55:41 +02:00
|
|
|
if (wpa_s->sched_scan_interval == 0)
|
|
|
|
wpa_s->sched_scan_interval = 10;
|
2011-09-27 21:21:29 +02:00
|
|
|
wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;
|
|
|
|
wpa_s->first_sched_scan = 1;
|
|
|
|
ssid = wpa_s->conf->ssid;
|
|
|
|
wpa_s->prev_sched_ssid = ssid;
|
|
|
|
}
|
|
|
|
|
2011-11-28 17:12:38 +01:00
|
|
|
if (wildcard) {
|
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Add wildcard SSID to sched_scan");
|
|
|
|
params.num_ssids++;
|
|
|
|
}
|
|
|
|
|
2011-09-27 21:21:29 +02:00
|
|
|
while (ssid) {
|
2012-05-10 13:34:46 +02:00
|
|
|
if (wpas_network_disabled(wpa_s, ssid))
|
2011-11-28 17:09:37 +01:00
|
|
|
goto next;
|
2011-09-27 21:21:29 +02:00
|
|
|
|
2011-11-25 17:12:04 +01:00
|
|
|
if (params.num_filter_ssids < wpa_s->max_match_sets &&
|
|
|
|
params.filter_ssids && ssid->ssid && ssid->ssid_len) {
|
2011-11-18 22:05:57 +01:00
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "add to filter ssid: %s",
|
|
|
|
wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
|
2011-09-27 21:21:35 +02:00
|
|
|
os_memcpy(params.filter_ssids[params.num_filter_ssids].ssid,
|
|
|
|
ssid->ssid, ssid->ssid_len);
|
|
|
|
params.filter_ssids[params.num_filter_ssids].ssid_len =
|
|
|
|
ssid->ssid_len;
|
|
|
|
params.num_filter_ssids++;
|
2011-11-28 16:52:36 +01:00
|
|
|
} else if (params.filter_ssids && ssid->ssid && ssid->ssid_len)
|
|
|
|
{
|
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Not enough room for SSID "
|
|
|
|
"filter for sched_scan - drop filter");
|
|
|
|
os_free(params.filter_ssids);
|
|
|
|
params.filter_ssids = NULL;
|
|
|
|
params.num_filter_ssids = 0;
|
2011-09-27 21:21:35 +02:00
|
|
|
}
|
|
|
|
|
2011-11-19 16:01:53 +01:00
|
|
|
if (ssid->scan_ssid && ssid->ssid && ssid->ssid_len) {
|
2011-11-28 17:12:38 +01:00
|
|
|
if (params.num_ssids == max_sched_scan_ssids)
|
|
|
|
break; /* only room for broadcast SSID */
|
2011-11-19 16:01:53 +01:00
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG,
|
|
|
|
"add to active scan ssid: %s",
|
2011-11-18 22:05:57 +01:00
|
|
|
wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
|
2011-09-27 21:21:29 +02:00
|
|
|
params.ssids[params.num_ssids].ssid =
|
|
|
|
ssid->ssid;
|
|
|
|
params.ssids[params.num_ssids].ssid_len =
|
|
|
|
ssid->ssid_len;
|
|
|
|
params.num_ssids++;
|
2011-09-27 21:21:35 +02:00
|
|
|
if (params.num_ssids >= max_sched_scan_ssids) {
|
2011-09-27 21:21:29 +02:00
|
|
|
wpa_s->prev_sched_ssid = ssid;
|
2012-04-17 15:51:09 +02:00
|
|
|
do {
|
|
|
|
ssid = ssid->next;
|
|
|
|
} while (ssid &&
|
2012-05-10 13:34:46 +02:00
|
|
|
(wpas_network_disabled(wpa_s, ssid) ||
|
2012-05-07 12:39:33 +02:00
|
|
|
!ssid->scan_ssid));
|
2011-09-27 21:21:29 +02:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
2011-09-27 21:21:35 +02:00
|
|
|
|
2011-11-28 17:09:37 +01:00
|
|
|
next:
|
2011-09-27 21:21:29 +02:00
|
|
|
wpa_s->prev_sched_ssid = ssid;
|
|
|
|
ssid = ssid->next;
|
|
|
|
}
|
|
|
|
|
2011-11-28 14:19:41 +01:00
|
|
|
if (params.num_filter_ssids == 0) {
|
|
|
|
os_free(params.filter_ssids);
|
|
|
|
params.filter_ssids = NULL;
|
|
|
|
}
|
|
|
|
|
2012-08-13 20:48:55 +02:00
|
|
|
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);
|
|
|
|
}
|
2011-09-27 21:21:29 +02:00
|
|
|
|
2014-01-22 15:15:23 +01:00
|
|
|
if (wpa_s->conf->filter_rssi)
|
|
|
|
params.filter_rssi = wpa_s->conf->filter_rssi;
|
|
|
|
|
2012-06-26 17:55:41 +02:00
|
|
|
scan_params = ¶ms;
|
|
|
|
|
|
|
|
scan:
|
2011-11-28 16:52:02 +01:00
|
|
|
if (ssid || !wpa_s->first_sched_scan) {
|
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG,
|
|
|
|
"Starting sched scan: interval %d timeout %d",
|
|
|
|
wpa_s->sched_scan_interval, wpa_s->sched_scan_timeout);
|
2012-04-17 15:32:40 +02:00
|
|
|
} else {
|
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG,
|
|
|
|
"Starting sched scan: interval %d (no timeout)",
|
|
|
|
wpa_s->sched_scan_interval);
|
2011-11-28 16:52:02 +01:00
|
|
|
}
|
2011-09-27 21:21:29 +02:00
|
|
|
|
2012-03-09 06:28:13 +01:00
|
|
|
wpa_setband_scan_freqs(wpa_s, scan_params);
|
|
|
|
|
2012-06-26 17:55:41 +02:00
|
|
|
ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params,
|
2011-09-27 21:21:29 +02:00
|
|
|
wpa_s->sched_scan_interval);
|
2012-08-13 20:48:55 +02:00
|
|
|
wpabuf_free(extra_ie);
|
2011-09-27 21:21:35 +02:00
|
|
|
os_free(params.filter_ssids);
|
2011-09-27 21:21:29 +02:00
|
|
|
if (ret) {
|
|
|
|
wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate sched scan");
|
|
|
|
if (prev_state != wpa_s->wpa_state)
|
|
|
|
wpa_supplicant_set_state(wpa_s, prev_state);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If we have more SSIDs to scan, add a timeout so we scan them too */
|
|
|
|
if (ssid || !wpa_s->first_sched_scan) {
|
|
|
|
wpa_s->sched_scan_timed_out = 0;
|
|
|
|
eloop_register_timeout(wpa_s->sched_scan_timeout, 0,
|
|
|
|
wpa_supplicant_sched_scan_timeout,
|
|
|
|
wpa_s, NULL);
|
|
|
|
wpa_s->first_sched_scan = 0;
|
|
|
|
wpa_s->sched_scan_timeout /= 2;
|
|
|
|
wpa_s->sched_scan_interval *= 2;
|
2013-03-10 16:27:48 +01:00
|
|
|
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;
|
|
|
|
}
|
2011-09-27 21:21:29 +02:00
|
|
|
}
|
|
|
|
|
2013-03-10 16:32:03 +01:00
|
|
|
/* If there is no more ssids, start next time from the beginning */
|
|
|
|
if (!ssid)
|
|
|
|
wpa_s->prev_sched_ssid = NULL;
|
|
|
|
|
2011-09-27 21:21:29 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2008-02-28 02:34:43 +01:00
|
|
|
/**
|
|
|
|
* wpa_supplicant_cancel_scan - Cancel a scheduled scan request
|
|
|
|
* @wpa_s: Pointer to wpa_supplicant data
|
|
|
|
*
|
|
|
|
* This function is used to cancel a scan request scheduled with
|
|
|
|
* wpa_supplicant_req_scan().
|
|
|
|
*/
|
|
|
|
void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s)
|
|
|
|
{
|
2011-02-10 19:14:46 +01:00
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling scan request");
|
2008-02-28 02:34:43 +01:00
|
|
|
eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL);
|
|
|
|
}
|
2009-05-27 20:06:40 +02:00
|
|
|
|
|
|
|
|
2013-07-20 16:47:02 +02:00
|
|
|
/**
|
|
|
|
* 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);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-09-27 21:21:29 +02:00
|
|
|
/**
|
|
|
|
* wpa_supplicant_cancel_sched_scan - Stop running scheduled scans
|
|
|
|
* @wpa_s: Pointer to wpa_supplicant data
|
|
|
|
*
|
|
|
|
* This function is used to stop a periodic scheduled scan.
|
|
|
|
*/
|
|
|
|
void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s)
|
|
|
|
{
|
|
|
|
if (!wpa_s->sched_scanning)
|
|
|
|
return;
|
|
|
|
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2012-12-27 11:29:05 +01:00
|
|
|
/**
|
|
|
|
* 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.
|
|
|
|
*/
|
2009-05-27 20:06:40 +02:00
|
|
|
void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s,
|
|
|
|
int scanning)
|
|
|
|
{
|
|
|
|
if (wpa_s->scanning != scanning) {
|
|
|
|
wpa_s->scanning = scanning;
|
2009-09-13 19:53:32 +02:00
|
|
|
wpas_notify_scanning(wpa_s);
|
2009-05-27 20:06:40 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-01-03 17:48:11 +01:00
|
|
|
|
|
|
|
static int wpa_scan_get_max_rate(const struct wpa_scan_res *res)
|
|
|
|
{
|
|
|
|
int rate = 0;
|
|
|
|
const u8 *ie;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
ie = wpa_scan_get_ie(res, WLAN_EID_SUPP_RATES);
|
|
|
|
for (i = 0; ie && i < ie[1]; i++) {
|
|
|
|
if ((ie[i + 2] & 0x7f) > rate)
|
|
|
|
rate = ie[i + 2] & 0x7f;
|
|
|
|
}
|
|
|
|
|
|
|
|
ie = wpa_scan_get_ie(res, WLAN_EID_EXT_SUPP_RATES);
|
|
|
|
for (i = 0; ie && i < ie[1]; i++) {
|
|
|
|
if ((ie[i + 2] & 0x7f) > rate)
|
|
|
|
rate = ie[i + 2] & 0x7f;
|
|
|
|
}
|
|
|
|
|
|
|
|
return rate;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2012-12-27 11:29:05 +01:00
|
|
|
/**
|
|
|
|
* 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.
|
|
|
|
*/
|
2010-01-03 19:27:32 +01:00
|
|
|
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;
|
|
|
|
|
|
|
|
while (pos + 1 < end) {
|
|
|
|
if (pos + 2 + pos[1] > end)
|
|
|
|
break;
|
|
|
|
if (pos[0] == ie)
|
|
|
|
return pos;
|
|
|
|
pos += 2 + pos[1];
|
|
|
|
}
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2012-12-27 11:29:05 +01:00
|
|
|
/**
|
|
|
|
* 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.
|
|
|
|
*/
|
2010-01-03 17:48:11 +01:00
|
|
|
const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res,
|
|
|
|
u32 vendor_type)
|
|
|
|
{
|
|
|
|
const u8 *end, *pos;
|
|
|
|
|
|
|
|
pos = (const u8 *) (res + 1);
|
|
|
|
end = pos + res->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]))
|
|
|
|
return pos;
|
|
|
|
pos += 2 + pos[1];
|
|
|
|
}
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2013-10-14 18:25:28 +02:00
|
|
|
/**
|
|
|
|
* 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)
|
|
|
|
{
|
|
|
|
const u8 *end, *pos;
|
|
|
|
|
|
|
|
if (res->beacon_ie_len == 0)
|
|
|
|
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]))
|
|
|
|
return pos;
|
|
|
|
pos += 2 + pos[1];
|
|
|
|
}
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2012-12-27 11:29:05 +01:00
|
|
|
/**
|
|
|
|
* 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.
|
|
|
|
*/
|
2010-01-03 17:48:11 +01:00
|
|
|
struct wpabuf * wpa_scan_get_vendor_ie_multi(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)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
pos = (const u8 *) (res + 1);
|
|
|
|
end = pos + res->ie_len;
|
|
|
|
|
2010-05-26 16:16:14 +02:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-08-06 01:23:12 +02:00
|
|
|
/*
|
|
|
|
* 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
|
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
#define GREAT_SNR 30
|
|
|
|
|
2010-01-03 17:48:11 +01:00
|
|
|
/* 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)
|
|
|
|
{
|
2011-08-06 01:23:12 +02:00
|
|
|
#define IS_5GHZ(n) (n > 4000)
|
|
|
|
#define MIN(a,b) a < b ? a : b
|
2010-01-03 17:48:11 +01:00
|
|
|
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;
|
2011-08-06 01:23:12 +02:00
|
|
|
int snr_a, snr_b;
|
2010-01-03 17:48:11 +01:00
|
|
|
|
|
|
|
/* WPA/WPA2 support preferred */
|
|
|
|
wpa_a = wpa_scan_get_vendor_ie(wa, WPA_IE_VENDOR_TYPE) != NULL ||
|
|
|
|
wpa_scan_get_ie(wa, WLAN_EID_RSN) != NULL;
|
|
|
|
wpa_b = wpa_scan_get_vendor_ie(wb, WPA_IE_VENDOR_TYPE) != NULL ||
|
|
|
|
wpa_scan_get_ie(wb, WLAN_EID_RSN) != NULL;
|
|
|
|
|
|
|
|
if (wpa_b && !wpa_a)
|
|
|
|
return 1;
|
|
|
|
if (!wpa_b && wpa_a)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
/* privacy support preferred */
|
|
|
|
if ((wa->caps & IEEE80211_CAP_PRIVACY) == 0 &&
|
|
|
|
(wb->caps & IEEE80211_CAP_PRIVACY))
|
|
|
|
return 1;
|
|
|
|
if ((wa->caps & IEEE80211_CAP_PRIVACY) &&
|
|
|
|
(wb->caps & IEEE80211_CAP_PRIVACY) == 0)
|
|
|
|
return -1;
|
|
|
|
|
2011-08-06 01:23:12 +02:00
|
|
|
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);
|
|
|
|
} else {
|
|
|
|
/* Not suitable information to calculate SNR, so use level */
|
|
|
|
snr_a = wa->level;
|
|
|
|
snr_b = wb->level;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* best/max rate preferred if SNR close enough */
|
|
|
|
if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) ||
|
2010-01-03 17:48:11 +01:00
|
|
|
(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;
|
2011-08-06 01:23:12 +02:00
|
|
|
if (IS_5GHZ(wa->freq) ^ IS_5GHZ(wb->freq))
|
|
|
|
return IS_5GHZ(wa->freq) ? -1 : 1;
|
2010-01-03 17:48:11 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/* use freq for channel preference */
|
|
|
|
|
2011-08-06 01:23:12 +02:00
|
|
|
/* all things being equal, use SNR; if SNRs are
|
2010-01-03 17:48:11 +01:00
|
|
|
* identical, use quality values since some drivers may only report
|
|
|
|
* that value and leave the signal level zero */
|
2011-08-06 01:23:12 +02:00
|
|
|
if (snr_b == snr_a)
|
2010-01-03 17:48:11 +01:00
|
|
|
return wb->qual - wa->qual;
|
2011-08-06 01:23:12 +02:00
|
|
|
return snr_b - snr_a;
|
|
|
|
#undef MIN
|
|
|
|
#undef IS_5GHZ
|
2010-01-03 17:48:11 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2010-06-11 22:50:13 +02:00
|
|
|
#ifdef CONFIG_WPS
|
|
|
|
/* Compare function for sorting scan results when searching a WPS AP for
|
|
|
|
* provisioning. Return >0 if @b is considered better. */
|
|
|
|
static int wpa_scan_result_wps_compar(const void *a, const void *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 uses_wps_a, uses_wps_b;
|
|
|
|
struct wpabuf *wps_a, *wps_b;
|
|
|
|
int res;
|
|
|
|
|
|
|
|
/* Optimization - check WPS IE existence before allocated memory and
|
|
|
|
* doing full reassembly. */
|
|
|
|
uses_wps_a = wpa_scan_get_vendor_ie(wa, WPS_IE_VENDOR_TYPE) != NULL;
|
|
|
|
uses_wps_b = wpa_scan_get_vendor_ie(wb, WPS_IE_VENDOR_TYPE) != NULL;
|
|
|
|
if (uses_wps_a && !uses_wps_b)
|
|
|
|
return -1;
|
|
|
|
if (!uses_wps_a && uses_wps_b)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if (uses_wps_a && uses_wps_b) {
|
|
|
|
wps_a = wpa_scan_get_vendor_ie_multi(wa, WPS_IE_VENDOR_TYPE);
|
|
|
|
wps_b = wpa_scan_get_vendor_ie_multi(wb, WPS_IE_VENDOR_TYPE);
|
|
|
|
res = wps_ap_priority_compar(wps_a, wps_b);
|
|
|
|
wpabuf_free(wps_a);
|
|
|
|
wpabuf_free(wps_b);
|
|
|
|
if (res)
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Do not use current AP security policy as a sorting criteria during
|
|
|
|
* WPS provisioning step since the AP may get reconfigured at the
|
|
|
|
* completion of provisioning.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* all things being equal, use signal level; if signal levels are
|
|
|
|
* identical, use quality values since some drivers may only report
|
|
|
|
* that value and leave the signal level zero */
|
|
|
|
if (wb->level == wa->level)
|
|
|
|
return wb->qual - wa->qual;
|
|
|
|
return wb->level - wa->level;
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_WPS */
|
|
|
|
|
|
|
|
|
2011-10-30 19:33:08 +01:00
|
|
|
static void dump_scan_res(struct wpa_scan_results *scan_res)
|
|
|
|
{
|
2011-12-11 17:13:51 +01:00
|
|
|
#ifndef CONFIG_NO_STDOUT_DEBUG
|
2011-10-30 19:33:08 +01:00
|
|
|
size_t i;
|
|
|
|
|
|
|
|
if (scan_res->res == NULL || scan_res->num == 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
wpa_printf(MSG_EXCESSIVE, "Sorted scan results");
|
|
|
|
|
|
|
|
for (i = 0; i < scan_res->num; i++) {
|
|
|
|
struct wpa_scan_res *r = scan_res->res[i];
|
2012-05-11 14:30:05 +02:00
|
|
|
u8 *pos;
|
2011-10-30 19:33:08 +01:00
|
|
|
if ((r->flags & (WPA_SCAN_LEVEL_DBM | WPA_SCAN_NOISE_INVALID))
|
|
|
|
== WPA_SCAN_LEVEL_DBM) {
|
|
|
|
int snr = r->level - r->noise;
|
|
|
|
wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
|
2013-02-12 18:14:32 +01:00
|
|
|
"noise=%d level=%d snr=%d%s flags=0x%x "
|
|
|
|
"age=%u",
|
2011-10-30 19:33:08 +01:00
|
|
|
MAC2STR(r->bssid), r->freq, r->qual,
|
|
|
|
r->noise, r->level, snr,
|
2013-02-12 18:14:32 +01:00
|
|
|
snr >= GREAT_SNR ? "*" : "", r->flags,
|
|
|
|
r->age);
|
2011-10-30 19:33:08 +01:00
|
|
|
} else {
|
|
|
|
wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
|
2013-02-12 18:14:32 +01:00
|
|
|
"noise=%d level=%d flags=0x%x age=%u",
|
2011-10-30 19:33:08 +01:00
|
|
|
MAC2STR(r->bssid), r->freq, r->qual,
|
2013-02-12 18:14:32 +01:00
|
|
|
r->noise, r->level, r->flags, r->age);
|
2011-10-30 19:33:08 +01:00
|
|
|
}
|
2012-05-11 14:30:05 +02:00
|
|
|
pos = (u8 *) (r + 1);
|
|
|
|
if (r->ie_len)
|
|
|
|
wpa_hexdump(MSG_EXCESSIVE, "IEs", pos, r->ie_len);
|
|
|
|
pos += r->ie_len;
|
|
|
|
if (r->beacon_ie_len)
|
|
|
|
wpa_hexdump(MSG_EXCESSIVE, "Beacon IEs",
|
|
|
|
pos, r->beacon_ie_len);
|
2011-10-30 19:33:08 +01:00
|
|
|
}
|
2011-12-11 17:13:51 +01:00
|
|
|
#endif /* CONFIG_NO_STDOUT_DEBUG */
|
2011-10-30 19:33:08 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2012-12-27 11:29:05 +01:00
|
|
|
/**
|
|
|
|
* 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).
|
|
|
|
*/
|
2012-02-16 15:30:13 +01:00
|
|
|
int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s,
|
|
|
|
const u8 *bssid)
|
|
|
|
{
|
|
|
|
size_t i;
|
|
|
|
|
|
|
|
if (wpa_s->bssid_filter == NULL)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
for (i = 0; i < wpa_s->bssid_filter_count; i++) {
|
|
|
|
if (os_memcmp(wpa_s->bssid_filter + i * ETH_ALEN, bssid,
|
|
|
|
ETH_ALEN) == 0)
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void filter_scan_res(struct wpa_supplicant *wpa_s,
|
|
|
|
struct wpa_scan_results *res)
|
|
|
|
{
|
|
|
|
size_t i, j;
|
|
|
|
|
|
|
|
if (wpa_s->bssid_filter == NULL)
|
|
|
|
return;
|
|
|
|
|
|
|
|
for (i = 0, j = 0; i < res->num; i++) {
|
|
|
|
if (wpa_supplicant_filter_bssid_match(wpa_s,
|
|
|
|
res->res[i]->bssid)) {
|
|
|
|
res->res[j++] = res->res[i];
|
|
|
|
} else {
|
|
|
|
os_free(res->res[i]);
|
|
|
|
res->res[i] = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (res->num != j) {
|
|
|
|
wpa_printf(MSG_DEBUG, "Filtered out %d scan results",
|
|
|
|
(int) (res->num - j));
|
|
|
|
res->num = j;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2010-01-03 17:48:11 +01:00
|
|
|
/**
|
|
|
|
* wpa_supplicant_get_scan_results - Get scan results
|
|
|
|
* @wpa_s: Pointer to wpa_supplicant data
|
|
|
|
* @info: Information about what was scanned or %NULL if not available
|
|
|
|
* @new_scan: Whether a new scan was performed
|
|
|
|
* Returns: Scan results, %NULL on failure
|
|
|
|
*
|
|
|
|
* This function request the current scan results from the driver and updates
|
|
|
|
* the local BSS list wpa_s->bss. The caller is responsible for freeing the
|
|
|
|
* results with wpa_scan_results_free().
|
|
|
|
*/
|
|
|
|
struct wpa_scan_results *
|
|
|
|
wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s,
|
|
|
|
struct scan_info *info, int new_scan)
|
|
|
|
{
|
|
|
|
struct wpa_scan_results *scan_res;
|
|
|
|
size_t i;
|
2010-06-11 22:50:13 +02:00
|
|
|
int (*compar)(const void *, const void *) = wpa_scan_result_compar;
|
2010-01-03 17:48:11 +01:00
|
|
|
|
2011-10-22 21:45:38 +02:00
|
|
|
scan_res = wpa_drv_get_scan_results2(wpa_s);
|
2010-01-03 17:48:11 +01:00
|
|
|
if (scan_res == NULL) {
|
2011-02-10 19:14:46 +01:00
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results");
|
2010-01-03 17:48:11 +01:00
|
|
|
return NULL;
|
|
|
|
}
|
2013-02-12 18:14:32 +01:00
|
|
|
if (scan_res->fetch_time.sec == 0) {
|
|
|
|
/*
|
|
|
|
* Make sure we have a valid timestamp if the driver wrapper
|
|
|
|
* does not set this.
|
|
|
|
*/
|
2013-12-16 21:08:28 +01:00
|
|
|
os_get_reltime(&scan_res->fetch_time);
|
2013-02-12 18:14:32 +01:00
|
|
|
}
|
2012-02-16 15:30:13 +01:00
|
|
|
filter_scan_res(wpa_s, scan_res);
|
2010-01-03 17:48:11 +01:00
|
|
|
|
2010-06-11 22:50:13 +02:00
|
|
|
#ifdef CONFIG_WPS
|
2013-12-29 16:59:12 +01:00
|
|
|
if (wpas_wps_searching(wpa_s)) {
|
2011-02-10 19:14:46 +01:00
|
|
|
wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS "
|
|
|
|
"provisioning rules");
|
2010-06-11 22:50:13 +02:00
|
|
|
compar = wpa_scan_result_wps_compar;
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_WPS */
|
|
|
|
|
2010-01-03 17:48:11 +01:00
|
|
|
qsort(scan_res->res, scan_res->num, sizeof(struct wpa_scan_res *),
|
2010-06-11 22:50:13 +02:00
|
|
|
compar);
|
2011-10-30 19:33:08 +01:00
|
|
|
dump_scan_res(scan_res);
|
2010-01-03 17:48:11 +01:00
|
|
|
|
|
|
|
wpa_bss_update_start(wpa_s);
|
|
|
|
for (i = 0; i < scan_res->num; i++)
|
2013-02-12 18:14:32 +01:00
|
|
|
wpa_bss_update_scan_res(wpa_s, scan_res->res[i],
|
|
|
|
&scan_res->fetch_time);
|
2010-01-03 17:48:11 +01:00
|
|
|
wpa_bss_update_end(wpa_s, info, new_scan);
|
|
|
|
|
|
|
|
return scan_res;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2012-12-27 11:29:05 +01:00
|
|
|
/**
|
|
|
|
* 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).
|
|
|
|
*/
|
2010-01-03 17:48:11 +01:00
|
|
|
int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s)
|
|
|
|
{
|
|
|
|
struct wpa_scan_results *scan_res;
|
|
|
|
scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0);
|
|
|
|
if (scan_res == NULL)
|
|
|
|
return -1;
|
|
|
|
wpa_scan_results_free(scan_res);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2013-02-07 17:06:51 +01:00
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 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");
|
2013-12-26 16:35:48 +01:00
|
|
|
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);
|
|
|
|
}
|
2013-02-07 17:06:51 +01:00
|
|
|
wpas_notify_scan_results(wpa_s);
|
|
|
|
wpas_notify_scan_done(wpa_s, 1);
|
2013-11-24 21:07:05 +01:00
|
|
|
if (wpa_s->scan_work) {
|
|
|
|
struct wpa_radio_work *work = wpa_s->scan_work;
|
|
|
|
wpa_s->scan_work = NULL;
|
|
|
|
radio_work_done(work);
|
|
|
|
}
|
2013-02-07 17:06:51 +01:00
|
|
|
}
|
2013-03-18 16:11:15 +01:00
|
|
|
|
|
|
|
|
|
|
|
int wpas_scan_scheduled(struct wpa_supplicant *wpa_s)
|
|
|
|
{
|
|
|
|
return eloop_is_timeout_registered(wpa_supplicant_scan, wpa_s, NULL);
|
|
|
|
}
|
2014-01-03 08:48:00 +01:00
|
|
|
|
|
|
|
|
|
|
|
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) {
|
2014-01-28 08:32:34 +01:00
|
|
|
params->filter_ssids = os_malloc(sizeof(*params->filter_ssids) *
|
2014-01-03 08:48:00 +01:00
|
|
|
src->num_filter_ssids);
|
|
|
|
if (params->filter_ssids == NULL)
|
|
|
|
goto failed;
|
|
|
|
os_memcpy(params->filter_ssids, src->filter_ssids,
|
2014-01-28 08:32:34 +01:00
|
|
|
sizeof(*params->filter_ssids) *
|
|
|
|
src->num_filter_ssids);
|
2014-01-03 08:48:00 +01:00
|
|
|
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;
|
|
|
|
|
|
|
|
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);
|
|
|
|
}
|
2014-02-26 07:04:10 +01:00
|
|
|
|
|
|
|
|
|
|
|
int wpas_start_pno(struct wpa_supplicant *wpa_s)
|
|
|
|
{
|
|
|
|
int ret, interval;
|
|
|
|
size_t i, num_ssid;
|
|
|
|
struct wpa_ssid *ssid;
|
|
|
|
struct wpa_driver_scan_params params;
|
|
|
|
|
2014-02-26 07:04:11 +01:00
|
|
|
if (!wpa_s->sched_scan_supported)
|
|
|
|
return -1;
|
|
|
|
|
2014-02-26 07:04:10 +01:00
|
|
|
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 = 0;
|
|
|
|
ssid = wpa_s->conf->ssid;
|
|
|
|
while (ssid) {
|
|
|
|
if (!wpas_network_disabled(wpa_s, ssid))
|
|
|
|
num_ssid++;
|
|
|
|
ssid = ssid->next;
|
|
|
|
}
|
|
|
|
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_ssid == 0) {
|
|
|
|
wpa_printf(MSG_DEBUG, "PNO: No configured SSIDs");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
params.filter_ssids = os_malloc(sizeof(struct wpa_driver_scan_filter) *
|
|
|
|
num_ssid);
|
|
|
|
if (params.filter_ssids == NULL)
|
|
|
|
return -1;
|
|
|
|
i = 0;
|
|
|
|
ssid = wpa_s->conf->ssid;
|
|
|
|
while (ssid) {
|
|
|
|
if (!wpas_network_disabled(wpa_s, ssid)) {
|
|
|
|
params.ssids[i].ssid = ssid->ssid;
|
|
|
|
params.ssids[i].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_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;
|
|
|
|
|
2014-03-14 21:55:25 +01:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2014-02-26 07:04:10 +01:00
|
|
|
ret = wpa_supplicant_start_sched_scan(wpa_s, ¶ms, interval);
|
|
|
|
os_free(params.filter_ssids);
|
|
|
|
if (ret == 0)
|
|
|
|
wpa_s->pno = 1;
|
2014-02-26 07:04:11 +01:00
|
|
|
else
|
|
|
|
wpa_msg(wpa_s, MSG_ERROR, "Failed to schedule PNO");
|
2014-02-26 07:04:10 +01:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
int wpas_stop_pno(struct wpa_supplicant *wpa_s)
|
|
|
|
{
|
|
|
|
int ret = 0;
|
|
|
|
|
2014-02-26 07:04:11 +01:00
|
|
|
if (!wpa_s->pno)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
ret = wpa_supplicant_stop_sched_scan(wpa_s);
|
2014-02-26 07:04:10 +01:00
|
|
|
|
2014-02-26 07:04:11 +01:00
|
|
|
wpa_s->pno = 0;
|
2014-02-26 07:04:10 +01:00
|
|
|
wpa_s->pno_sched_pending = 0;
|
|
|
|
|
|
|
|
if (wpa_s->wpa_state == WPA_SCANNING)
|
|
|
|
wpa_supplicant_req_scan(wpa_s, 0, 0);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|