C++ wpa_supplicant_req_scan函数代码示例

static int wpa_supplicant_ctrl_iface_enable_network(
	struct wpa_supplicant *wpa_s, char *cmd)
{
	int id;
	struct wpa_ssid *ssid;

	/* cmd: "<network id>" */
	id = atoi(cmd);
	wpa_printf(MSG_DEBUG, "CTRL_IFACE: ENABLE_NETWORK id=%d", id);

	ssid = wpa_config_get_network(wpa_s->conf, id);
	if (ssid == NULL) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
			   "id=%d", id);
		return -1;
	}

	if (wpa_s->current_ssid == NULL && ssid->disabled) {
		/*
		 * Try to reassociate since there is no current configuration
		 * and a new network was made available. */
		wpa_s->reassociate = 1;
#ifdef ANDROID
		wpa_supplicant_req_scan(wpa_s, 2, 0);
#else
		wpa_supplicant_req_scan(wpa_s, 0, 0);
#endif
	}
	ssid->disabled = 0;

	return 0;
}

static void request_scan(struct wpa_supplicant *wpa_s)
{
	wpa_s->scan_req = 2;

	if (wpa_supplicant_req_sched_scan(wpa_s))
		wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval, 0);
}

void hs20_start_osu_scan(struct wpa_supplicant *wpa_s)
{
	wpa_s->num_osu_scans++;
	wpa_s->scan_req = MANUAL_SCAN_REQ;
	wpa_s->scan_res_handler = hs20_osu_scan_res_handler;
	wpa_supplicant_req_scan(wpa_s, 0, 0);
}

static int wpa_supplicant_ctrl_iface_select_network(
	struct wpa_supplicant *wpa_s, char *cmd)
{
	int id;
	struct wpa_ssid *ssid;

	/* cmd: "<network id>" or "any" */
	if (os_strcmp(cmd, "any") == 0) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: SELECT_NETWORK any");
		ssid = wpa_s->conf->ssid;
		while (ssid) {
			ssid->disabled = 0;
			ssid = ssid->next;
		}
		wpa_s->reassociate = 1;
		wpa_supplicant_req_scan(wpa_s, 0, 0);
		return 0;
	}

	id = atoi(cmd);
	wpa_printf(MSG_DEBUG, "CTRL_IFACE: SELECT_NETWORK id=%d", id);

	ssid = wpa_config_get_network(wpa_s->conf, id);
	if (ssid == NULL) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
			   "id=%d", id);
		return -1;
	}

	if (ssid != wpa_s->current_ssid && wpa_s->current_ssid)
		wpa_supplicant_disassociate(wpa_s, REASON_DEAUTH_LEAVING);

	/* Mark all other networks disabled and trigger reassociation */
	ssid = wpa_s->conf->ssid;
	while (ssid) {
		ssid->disabled = id != ssid->id;
		ssid = ssid->next;
	}
	wpa_s->reassociate = 1;
	wpa_s->prev_scan_ssid = BROADCAST_SSID_SCAN;
	wpa_supplicant_req_scan(wpa_s, 0, 0);

	return 0;
}

static void wpa_supplicant_assoc_try(struct wpa_supplicant *wpa_s,
				     struct wpa_ssid *ssid)
{
	while (ssid) {
		if (!ssid->disabled)
			break;
		ssid = ssid->next;
	}

	/* ap_scan=2 mode - try to associate with each SSID. */
	if (ssid == NULL) {
		wpa_dbg(wpa_s, MSG_DEBUG, "wpa_supplicant_assoc_try: Reached "
			"end of scan list - go back to beginning");
		wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
		wpa_supplicant_req_scan(wpa_s, 0, 0);
		return;
	}
	if (ssid->next) {
		/* Continue from the next SSID on the next attempt. */
		wpa_s->prev_scan_ssid = ssid;
	} else {
		/* Start from the beginning of the SSID list. */
		wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
	}
	wpa_supplicant_associate(wpa_s, NULL, ssid);
}

static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
{
	const u8 *bssid;

	if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
		/*
		 * At least Host AP driver and a Prism3 card seemed to be
		 * generating streams of disconnected events when configuring
		 * IBSS for WPA-None. Ignore them for now.
		 */
		wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
			   "IBSS/WPA-None mode");
		return;
	}

	if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
	    wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
		wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
			"pre-shared key may be incorrect");
	}
	if (wpa_s->wpa_state >= WPA_ASSOCIATED)
		wpa_supplicant_req_scan(wpa_s, 0, 100000);
	bssid = wpa_s->bssid;
	if (is_zero_ether_addr(bssid))
		bssid = wpa_s->pending_bssid;
	wpa_blacklist_add(wpa_s, bssid);
	wpa_sm_notify_disassoc(wpa_s->wpa);
	wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
		"remove keys");
	if (wpa_supplicant_dynamic_keys(wpa_s)) {
		wpa_s->keys_cleared = 0;
		wpa_clear_keys(wpa_s, wpa_s->bssid);
	}
	wpa_supplicant_mark_disassoc(wpa_s);
}

/**
 * wpas_dbus_iface_scan - Request a wireless scan on an interface
 * @message: Pointer to incoming dbus message
 * @wpa_s: wpa_supplicant structure for a network interface
 * Returns: a dbus message containing a UINT32 indicating success (1) or
 *          failure (0)
 *
 * Handler function for "scan" method call of a network device. Requests
 * that wpa_supplicant perform a wireless scan as soon as possible
 * on a particular wireless interface.
 */
DBusMessage * wpas_dbus_iface_scan(DBusMessage *message,
				   struct wpa_supplicant *wpa_s)
{
	wpa_s->scan_req = 2;
	wpa_supplicant_req_scan(wpa_s, 0, 0);
	return wpas_dbus_new_success_reply(message);
}

static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s,
					  u16 reason_code)
{
	const u8 *bssid;
	int authenticating;
	u8 prev_pending_bssid[ETH_ALEN];

	authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
	os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);

	if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
		/*
		 * At least Host AP driver and a Prism3 card seemed to be
		 * generating streams of disconnected events when configuring
		 * IBSS for WPA-None. Ignore them for now.
		 */
		wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
			   "IBSS/WPA-None mode");
		return;
	}

	if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
	    wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
		wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
			"pre-shared key may be incorrect");
	}
	if (wpa_s->wpa_state >= WPA_ASSOCIATED)
		wpa_supplicant_req_scan(wpa_s, 0, 100000);
	bssid = wpa_s->bssid;
	if (is_zero_ether_addr(bssid))
		bssid = wpa_s->pending_bssid;
	wpas_connection_failed(wpa_s, bssid);
	wpa_sm_notify_disassoc(wpa_s->wpa);
	wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid=" MACSTR
		" reason=%d",
		MAC2STR(bssid), reason_code);
	if (wpa_supplicant_dynamic_keys(wpa_s)) {
		wpa_printf(MSG_DEBUG, "Disconnect event - remove keys");
		wpa_s->keys_cleared = 0;
		wpa_clear_keys(wpa_s, wpa_s->bssid);
	}

	if (wpa_s->wpa_state == WPA_DISCONNECTED) {
		wpa_s->disconnect_count++;
		if (!eloop_is_timeout_registered(wpa_disconnect_spam_handle, wpa_s, NULL)) {
			eloop_register_timeout(6, 0, wpa_disconnect_spam_handle, wpa_s, NULL);
			wpa_printf(MSG_DEBUG, "%s: scheduled DISCONNECT spam handler", __FUNCTION__);
		}
	}

	wpa_supplicant_mark_disassoc(wpa_s);
	bgscan_deinit(wpa_s);
	wpa_s->bgscan_ssid = NULL;

	if (authenticating && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
		sme_disassoc_while_authenticating(wpa_s, prev_pending_bssid);
}

static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s,
					  u16 reason_code)
{
	const u8 *bssid;
#ifdef CONFIG_SME
	int authenticating;
	u8 prev_pending_bssid[ETH_ALEN];

	authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
	os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);
#endif /* CONFIG_SME */

	if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
		/*
		 * At least Host AP driver and a Prism3 card seemed to be
		 * generating streams of disconnected events when configuring
		 * IBSS for WPA-None. Ignore them for now.
		 */
		wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
			   "IBSS/WPA-None mode");
		return;
	}

	if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
	    wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
		wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
			"pre-shared key may be incorrect");
	}
	if (!wpa_s->auto_reconnect_disabled ||
	    wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) {
		wpa_printf(MSG_DEBUG, "WPA: Auto connect enabled: try to "
			   "reconnect (wps=%d)",
			   wpa_s->key_mgmt == WPA_KEY_MGMT_WPS);
		if (wpa_s->wpa_state >= WPA_ASSOCIATING)
			wpa_supplicant_req_scan(wpa_s, 0, 100000);
	} else {
		wpa_printf(MSG_DEBUG, "WPA: Auto connect disabled: do not try "
			   "to re-connect");
		wpa_s->reassociate = 0;
		wpa_s->disconnected = 1;
	}
	bssid = wpa_s->bssid;
	if (is_zero_ether_addr(bssid))
		bssid = wpa_s->pending_bssid;
	wpa_blacklist_add(wpa_s, bssid);
	wpa_sm_notify_disassoc(wpa_s->wpa);
	wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid=" MACSTR
		" reason=%d",
		MAC2STR(bssid), reason_code);
	if (wpa_supplicant_dynamic_keys(wpa_s)) {
		wpa_printf(MSG_DEBUG, "Disconnect event - remove keys");
		wpa_s->keys_cleared = 0;
		wpa_clear_keys(wpa_s, wpa_s->bssid);
	}
	wpa_supplicant_mark_disassoc(wpa_s);
}

static int wpa_supplicant_ctrl_iface_enable_network(
	struct wpa_supplicant *wpa_s, char *cmd)
{
	int id;
	struct wpa_ssid *ssid;

	/* cmd: "<network id>" or "all" */
	if (os_strcmp(cmd, "all") == 0) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: ENABLE_NETWORK all");
		ssid = wpa_s->conf->ssid;
		while (ssid) {
			if (ssid == wpa_s->current_ssid && ssid->disabled)
				wpa_s->reassociate = 1;
			ssid->disabled = 0;
			ssid = ssid->next;
		}
		if (wpa_s->reassociate)
			wpa_supplicant_req_scan(wpa_s, 0, 0);
		return 0;
	}

	id = atoi(cmd);
	wpa_printf(MSG_DEBUG, "CTRL_IFACE: ENABLE_NETWORK id=%d", id);

	ssid = wpa_config_get_network(wpa_s->conf, id);
	if (ssid == NULL) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
			   "id=%d", id);
		return -1;
	}

	if (wpa_s->current_ssid == NULL && ssid->disabled) {
		/*
		 * Try to reassociate since there is no current configuration
		 * and a new network was made available. */
		wpa_s->reassociate = 1;
		wpa_supplicant_req_scan(wpa_s, 0, 0);
	}
	ssid->disabled = 0;

	return 0;
}

/* ARGSUSED */
static void
wpa_supplicant_timeout(void *eloop_ctx, void *timeout_ctx)
{
	struct wpa_supplicant *wpa_s = eloop_ctx;

	wpa_printf(MSG_INFO, "Authentication with " MACSTR " timed out.",
	    MAC2STR(wpa_s->bssid));

	wpa_s->reassociate = 1;
	wpa_supplicant_req_scan(wpa_s, 0, 0);
}

static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
						void *sock_ctx)
{
	struct wpa_supplicant *wpa_s = eloop_ctx;

	if (wpa_s->countermeasures) {
		wpa_s->countermeasures = 0;
		wpa_drv_set_countermeasures(wpa_s, 0);
		wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
		wpa_supplicant_req_scan(wpa_s, 0, 0);
	}
}

int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
{
	interworking_stop_fetch_anqp(wpa_s);
	wpa_s->network_select = 1;
	wpa_s->auto_select = !!auto_select;
	wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
		   "selection");
	wpa_s->scan_res_handler = interworking_scan_res_handler;
	wpa_s->scan_req = 2;
	wpa_supplicant_req_scan(wpa_s, 0, 0);

	return 0;
}

static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
					int timeout_sec, int timeout_usec)
{
	if (!wpa_supplicant_enabled_networks(wpa_s->conf)) {
		/*
		 * No networks are enabled; short-circuit request so
		 * we don't wait timeout seconds before transitioning
		 * to INACTIVE state.
		 */
		wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
		return;
	}
	wpa_supplicant_req_scan(wpa_s, timeout_sec, timeout_usec);
}

/*
 * wpa_event_handler - report a driver event for wpa_supplicant
 * @wpa_s: pointer to wpa_supplicant data; this is the @ctx variable registered
 *	with wpa_driver_events_init()
 * @event: event type (defined above)
 *
 * Driver wrapper code should call this function whenever an event is received
 * from the driver.
 */
void
wpa_event_handler(void *cookie, wpa_event_type event)
{
	struct wpa_supplicant *wpa_s = cookie;
	uint8_t bssid[IEEE80211_ADDR_LEN];

	switch (event) {
	case EVENT_ASSOC:
		wpa_s->wpa_state = WPA_ASSOCIATED;
		wpa_printf(MSG_DEBUG, "\nAssociation event - clear replay "
		    "counter\n");
		(void) memset(wpa_s->rx_replay_counter, 0,
		    WPA_REPLAY_COUNTER_LEN);
		wpa_s->rx_replay_counter_set = 0;
		wpa_s->renew_snonce = 1;
		if (wpa_s->driver->get_bssid(wpa_s->linkid,
		    (char *)bssid) >= 0 &&
		    memcmp(bssid, wpa_s->bssid, IEEE80211_ADDR_LEN) != 0) {
			wpa_printf(MSG_DEBUG, "Associated to a new BSS: "
			    "BSSID=" MACSTR, MAC2STR(bssid));
			(void) memcpy(wpa_s->bssid, bssid, IEEE80211_ADDR_LEN);
			if (wpa_s->key_mgmt != WPA_KEY_MGMT_NONE)
				wpa_clear_keys(wpa_s, bssid);
		}

		wpa_s->eapol_received = 0;
		if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
			wpa_supplicant_cancel_auth_timeout(wpa_s);
		} else {
			/* Timeout for receiving the first EAPOL packet */
			wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
		}
		break;
	case EVENT_DISASSOC:
		if (wpa_s->wpa_state >= WPA_ASSOCIATED)
			wpa_supplicant_req_scan(wpa_s, 0, 100000);
		wpa_supplicant_mark_disassoc(wpa_s);
		wpa_printf(MSG_DEBUG, "Disconnect event - remove keys");
		if (wpa_s->key_mgmt != WPA_KEY_MGMT_NONE)
			wpa_clear_keys(wpa_s, wpa_s->bssid);
		break;
	case EVENT_SCAN_RESULTS:
		wpa_supplicant_scan_results(wpa_s);
		break;
	default:
		wpa_printf(MSG_INFO, "Unknown event %d", event);
		break;
	}
}