C++ (Cpp) wpa_supplicant_optimize_freqs Exemples

Exemple #1

static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx)
{
	struct wpa_supplicant *wpa_s = eloop_ctx;
	struct wpa_ssid *ssid;
	int scan_req = 0, ret;
	struct wpabuf *extra_ie;
	struct wpa_driver_scan_params params;
	size_t max_ssids;
	enum wpa_states prev_state;

	if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
		wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled");
		return;
	}

	if (wpa_s->disconnected && !wpa_s->scan_req) {
		wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
		return;
	}

	if (!wpa_supplicant_enabled_networks(wpa_s->conf) &&
	    !wpa_s->scan_req) {
		wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan");
		wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
		return;
	}

	if (wpa_s->conf->ap_scan != 0 &&
	    (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) {
		wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - "
			"overriding ap_scan configuration");
		wpa_s->conf->ap_scan = 0;
		wpas_notify_ap_scan_changed(wpa_s);
	}

	if (wpa_s->conf->ap_scan == 0) {
		wpa_supplicant_gen_assoc_event(wpa_s);
		return;
	}

#ifdef CONFIG_P2P
	if (wpas_p2p_in_progress(wpa_s)) {
		if (wpa_s->sta_scan_pending &&
		    wpas_p2p_in_progress(wpa_s) == 2 &&
		    wpa_s->global->p2p_cb_on_scan_complete) {
			wpa_dbg(wpa_s, MSG_DEBUG, "Process pending station "
				"mode scan during P2P search");
		} else {
			wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan "
				"while P2P operation is in progress");
			wpa_s->sta_scan_pending = 1;
			wpa_supplicant_req_scan(wpa_s, 5, 0);
			return;
		}
	}
#endif /* CONFIG_P2P */

	if (wpa_s->conf->ap_scan == 2)
		max_ssids = 1;
	else {
		max_ssids = wpa_s->max_scan_ssids;
		if (max_ssids > WPAS_MAX_SCAN_SSIDS)
			max_ssids = WPAS_MAX_SCAN_SSIDS;
	}

	scan_req = wpa_s->scan_req;
	wpa_s->scan_req = 0;

	os_memset(&params, 0, sizeof(params));

	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);

	if (scan_req != 2 && wpa_s->connect_without_scan) {
		for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
			if (ssid == wpa_s->connect_without_scan)
				break;
		}
		wpa_s->connect_without_scan = NULL;
		if (ssid) {
			wpa_printf(MSG_DEBUG, "Start a pre-selected network "
				   "without scan step");
			wpa_supplicant_associate(wpa_s, NULL, ssid);
			return;
		}
	}

	/* Find the starting point from which to continue scanning */
	ssid = wpa_s->conf->ssid;
	if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) {
		while (ssid) {
			if (ssid == wpa_s->prev_scan_ssid) {
				ssid = ssid->next;
				break;
			}
			ssid = ssid->next;
		}
	}

	if (scan_req != 2 && wpa_s->conf->ap_scan == 2) {
		wpa_s->connect_without_scan = NULL;
		wpa_s->prev_scan_wildcard = 0;
		wpa_supplicant_assoc_try(wpa_s, ssid);
		return;
#ifndef ANDROID
	} else if (wpa_s->conf->ap_scan == 2) {
		/*
		 * User-initiated scan request in ap_scan == 2; scan with
		 * wildcard SSID.
		 */
		ssid = NULL;
#endif
	} else {
		struct wpa_ssid *start = ssid, *tssid;
		int freqs_set = 0;
		if (ssid == NULL && max_ssids > 1)
			ssid = wpa_s->conf->ssid;
		while (ssid) {
			if (!ssid->disabled && ssid->scan_ssid) {
				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;
		}

		for (tssid = wpa_s->conf->ssid; tssid; tssid = tssid->next) {
			if (tssid->disabled)
				continue;
			if ((params.freqs || !freqs_set) && tssid->scan_freq) {
				int_array_concat(&params.freqs,
						 tssid->scan_freq);
			} else {
				os_free(params.freqs);
				params.freqs = NULL;
			}
			freqs_set = 1;
		}
		int_array_sort_unique(params.freqs);
	}

	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));
		}
	} 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++;
	} else {
		wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
		params.num_ssids++;
		wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard "
			"SSID");
	}

	wpa_supplicant_optimize_freqs(wpa_s, &params);
	extra_ie = wpa_supplicant_extra_ies(wpa_s, &params);

#ifdef CONFIG_HS20
	if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 6) == 0)
		wpas_hs20_add_indication(extra_ie);
#endif /* CONFIG_HS20 */

	if (params.freqs == NULL && wpa_s->next_scan_freqs) {
		wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously "
			"generated frequency list");
		params.freqs = wpa_s->next_scan_freqs;
	} else
		os_free(wpa_s->next_scan_freqs);
	wpa_s->next_scan_freqs = NULL;

	params.filter_ssids = wpa_supplicant_build_filter_ssids(
		wpa_s->conf, &params.num_filter_ssids);
	if (extra_ie) {
		params.extra_ies = wpabuf_head(extra_ie);
		params.extra_ies_len = wpabuf_len(extra_ie);
	}

#ifdef CONFIG_P2P
	if (wpa_s->p2p_in_provisioning) {
		/*
		 * 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 */

	ret = wpa_supplicant_trigger_scan(wpa_s, &params);

	wpabuf_free(extra_ie);
	os_free(params.freqs);
	os_free(params.filter_ssids);

	if (ret) {
		wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan");
		if (prev_state != wpa_s->wpa_state)
			wpa_supplicant_set_state(wpa_s, prev_state);
		/* Restore scan_req since we will try to scan again */
		wpa_s->scan_req = scan_req;
		wpa_supplicant_req_scan(wpa_s, 1, 0);
	}
}

Exemple #2

Fichier : scan.c Projet : GabberBaby/peapwn

static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx)
{
	struct wpa_supplicant *wpa_s = eloop_ctx;
	struct wpa_ssid *ssid;
	int ret;
	struct wpabuf *extra_ie = NULL;
	struct wpa_driver_scan_params params;
	struct wpa_driver_scan_params *scan_params;
	size_t max_ssids;
	enum wpa_states prev_state;

	if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
		wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled");
		wpas_p2p_continue_after_scan(wpa_s);
		return;
	}

	if (wpa_s->disconnected && wpa_s->scan_req == NORMAL_SCAN_REQ) {
		wpa_dbg(wpa_s, MSG_DEBUG, "Disconnected - do not scan");
		wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
		wpas_p2p_continue_after_scan(wpa_s);
		return;
	}

	if (wpa_s->scanning) {
		/*
		 * If we are already in scanning state, we shall reschedule the
		 * the incoming scan request.
		 */
		wpa_dbg(wpa_s, MSG_DEBUG, "Already scanning - Reschedule the incoming scan req");
		wpa_supplicant_req_scan(wpa_s, 1, 0);
		return;
	}

	if (!wpa_supplicant_enabled_networks(wpa_s) &&
	    wpa_s->scan_req == NORMAL_SCAN_REQ) {
		wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan");
		wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
		wpas_p2p_continue_after_scan(wpa_s);
		return;
	}

	if (wpa_s->conf->ap_scan != 0 &&
	    (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) {
		wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - "
			"overriding ap_scan configuration");
		wpa_s->conf->ap_scan = 0;
		wpas_notify_ap_scan_changed(wpa_s);
	}

	if (wpa_s->conf->ap_scan == 0) {
		wpa_supplicant_gen_assoc_event(wpa_s);
		return;
	}

#ifdef CONFIG_P2P
	if (wpas_p2p_in_progress(wpa_s) || wpas_wpa_is_in_progress(wpa_s, 0)) {
		if (wpa_s->sta_scan_pending &&
		    wpas_p2p_in_progress(wpa_s) == 2 &&
		    wpa_s->global->p2p_cb_on_scan_complete) {
			wpa_dbg(wpa_s, MSG_DEBUG, "Process pending station "
				"mode scan during P2P search");
		} else {
			wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan "
				"while P2P operation is in progress");
			wpa_s->sta_scan_pending = 1;
			wpa_supplicant_req_scan(wpa_s, 5, 0);
			return;
		}
	}
#endif /* CONFIG_P2P */

#ifdef CONFIG_GAS
	if (gas_query_in_progress(wpa_s->gas)) {
		wpa_dbg(wpa_s, MSG_DEBUG, "Delay scan while GAS query is in progress");
		wpa_supplicant_req_scan(wpa_s, 1, 0);
		return;
	}
#endif /* CONFIG_GAS */

	if (wpa_s->conf->ap_scan == 2)
		max_ssids = 1;
	else {
		max_ssids = wpa_s->max_scan_ssids;
		if (max_ssids > WPAS_MAX_SCAN_SSIDS)
			max_ssids = WPAS_MAX_SCAN_SSIDS;
	}

	wpa_s->last_scan_req = wpa_s->scan_req;
	wpa_s->scan_req = NORMAL_SCAN_REQ;

	os_memset(&params, 0, sizeof(params));

	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);

	/*
	 * If autoscan has set its own scanning parameters
	 */
	if (wpa_s->autoscan_params != NULL) {
		scan_params = wpa_s->autoscan_params;
		goto scan;
	}

	if (wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
	    wpa_s->connect_without_scan) {
		for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
			if (ssid == wpa_s->connect_without_scan)
				break;
		}
		wpa_s->connect_without_scan = NULL;
		if (ssid) {
			wpa_printf(MSG_DEBUG, "Start a pre-selected network "
				   "without scan step");
			wpa_supplicant_associate(wpa_s, NULL, ssid);
			return;
		}
	}

#ifdef CONFIG_P2P
	if ((wpa_s->p2p_in_provisioning || wpa_s->show_group_started) &&
	    wpa_s->go_params) {
		wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisioning=%d show_group_started=%d)",
			   wpa_s->p2p_in_provisioning,
			   wpa_s->show_group_started);
		params.ssids[0].ssid = wpa_s->go_params->ssid;
		params.ssids[0].ssid_len = wpa_s->go_params->ssid_len;
		params.num_ssids = 1;
		goto ssid_list_set;
	}
#endif /* CONFIG_P2P */

	/* Find the starting point from which to continue scanning */
	ssid = wpa_s->conf->ssid;
	if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) {
		while (ssid) {
			if (ssid == wpa_s->prev_scan_ssid) {
				ssid = ssid->next;
				break;
			}
			ssid = ssid->next;
		}
	}

	if (wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
	    wpa_s->conf->ap_scan == 2) {
		wpa_s->connect_without_scan = NULL;
		wpa_s->prev_scan_wildcard = 0;
		wpa_supplicant_assoc_try(wpa_s, ssid);
		return;
	} else if (wpa_s->conf->ap_scan == 2) {
		/*
		 * User-initiated scan request in ap_scan == 2; scan with
		 * wildcard SSID.
		 */
		ssid = NULL;
	} else {
		struct wpa_ssid *start = ssid, *tssid;
		int freqs_set = 0;
		if (ssid == NULL && max_ssids > 1)
			ssid = wpa_s->conf->ssid;
		while (ssid) {
			if (!wpas_network_disabled(wpa_s, ssid) &&
			    ssid->scan_ssid) {
				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;
		}

		for (tssid = wpa_s->conf->ssid; tssid; tssid = tssid->next) {
			if (wpas_network_disabled(wpa_s, tssid))
				continue;
			if ((params.freqs || !freqs_set) && tssid->scan_freq) {
				int_array_concat(&params.freqs,
						 tssid->scan_freq);
			} else {
				os_free(params.freqs);
				params.freqs = NULL;
			}
			freqs_set = 1;
		}
		int_array_sort_unique(params.freqs);
	}

	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));
		}
	} 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++;
	} else {
		wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
		params.num_ssids++;
		wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard "
			"SSID");
	}
#ifdef CONFIG_P2P
ssid_list_set:
#endif /* CONFIG_P2P */

	wpa_supplicant_optimize_freqs(wpa_s, &params);
	extra_ie = wpa_supplicant_extra_ies(wpa_s);

	if (params.freqs == NULL && wpa_s->next_scan_freqs) {
		wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously "
			"generated frequency list");
		params.freqs = wpa_s->next_scan_freqs;
	} else
		os_free(wpa_s->next_scan_freqs);
	wpa_s->next_scan_freqs = NULL;
	wpa_setband_scan_freqs(wpa_s, &params);

	/* 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(&params.freqs, wpa_s->conf->freq_list);
	}

	/* Use current associated channel? */
	if (wpa_s->conf->scan_cur_freq && !params.freqs) {
		unsigned int num = wpa_s->num_multichan_concurrent;

		params.freqs = os_calloc(num + 1, sizeof(int));
		if (params.freqs) {
			num = get_shared_radio_freqs(wpa_s, params.freqs, num);
			if (num > 0) {
				wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the "
					"current operating channels since "
					"scan_cur_freq is enabled");
			} else {
				os_free(params.freqs);
				params.freqs = NULL;
			}
		}
	}

	params.filter_ssids = wpa_supplicant_build_filter_ssids(
		wpa_s->conf, &params.num_filter_ssids);
	if (extra_ie) {
		params.extra_ies = wpabuf_head(extra_ie);
		params.extra_ies_len = wpabuf_len(extra_ie);
	}

#ifdef CONFIG_P2P
	if (wpa_s->p2p_in_provisioning ||
	    (wpa_s->show_group_started && wpa_s->go_params)) {
		/*
		 * 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 */

	scan_params = &params;

scan:
#ifdef CONFIG_P2P
	/*
	 * If the driver does not support multi-channel concurrency and a
	 * virtual interface that shares the same radio with the wpa_s interface
	 * is operating there may not be need to scan other channels apart from
	 * the current operating channel on the other virtual interface. Filter
	 * out other channels in case we are trying to find a connection for a
	 * station interface when we are not configured to prefer station
	 * connection and a concurrent operation is already in process.
	 */
	if (wpa_s->scan_for_connection &&
	    wpa_s->last_scan_req == NORMAL_SCAN_REQ &&
	    !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)) {
		unsigned int num = wpa_s->num_multichan_concurrent;

		params.freqs = os_calloc(num + 1, sizeof(int));
		if (params.freqs) {
			num = get_shared_radio_freqs(wpa_s, params.freqs, num);
			if (num > 0 && num == wpa_s->num_multichan_concurrent) {
				wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the current operating channels since all channels are already used");
			} else {
				os_free(params.freqs);
				params.freqs = NULL;
			}
		}
	}
#endif /* CONFIG_P2P */

	ret = wpa_supplicant_trigger_scan(wpa_s, scan_params);

	wpabuf_free(extra_ie);
	os_free(params.freqs);
	os_free(params.filter_ssids);

	if (ret) {
		wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan");
		if (prev_state != wpa_s->wpa_state)
			wpa_supplicant_set_state(wpa_s, prev_state);
		/* Restore scan_req since we will try to scan again */
		wpa_s->scan_req = wpa_s->last_scan_req;
		wpa_supplicant_req_scan(wpa_s, 1, 0);
	} else {
		wpa_s->scan_for_connection = 0;
	}
}