7/21/2023 0 Comments Windows lanscanThe application should then wait to receive the wlan_notification_acm_scan_complete notification or timeout after 4 seconds. The WlanScan function can then be called to initiate a scan. The application should first register for WLAN_NOTIFICATION_SOURCE_ACM notifications. The WlanScan function can be used by an application to track wireless network changes. The current default behavior is that the Wireless LAN Service only asks the wireless interface driver to scan for wireless networks every 60 seconds, and in some cases (when already connected to wireless network) the Wireless LAN Service does not ask for scans at all. The Wireless LAN Service does not track changes to the list of available networks across multiple scans. The Wireless LAN Service does not send notifications when available wireless networks change. Wireless network drivers that meet Windows logo requirements are required to complete a WlanScan function request in 4 seconds. The dwNotifSource parameter passed to the WlanRegisterNotification function must have the WLAN_NOTIFICATION_SOURCE_ACM bit set to register for notifications generated by the auto configuration module. To be notified when the network scan is complete, a client on Windows Vista and later must register for notifications by calling WlanRegisterNotification. The WlanScan function returns immediately. Applications should not assume that calling the WlanScan function will add to the existing list of available wireless networks returned by the WlanGetNetworkBssList or WlanGetAvailableNetworkList functions from previous scans. When the WlanScan function is called, the native 802.11 Wireless LAN driver may flush the current list of available wireless networks before the scan is initiated. The maximum data size, in bytes, of a PSD IE data entry.įor more information about PSD IEs, including a discussion of the format of a PSD IE, see the WlanSetPsdIEDataList function. When used to store a PSD IE, the DOT11_PSD_IE_MAX_DATA_SIZE constant defined in the Wlanapi.h header file is the maximum value of the dwDataSize member. The pIeData parameter passed to the WlanScan function can contain a pointer to an optional WLAN_RAW_DATA structure that contains a proximity service discovery (PSD) IE data entry. The buffer pointed to by the pIeData parameter must contain the complete IE starting from the Element ID. For instance, the Wi-Fi Protected Setup (WPS) IE can be included in the probe requests to discover WPS-capable access points. The probe requests include the information element (IE) pointed to by the pIeData parameter. If the pIeData parameter is not NULL, the driver will send probe requests during the scan. The driver may or may not send probe requests (an active scan) depending on its implementation and the values passed in the pDot11Ssid and pIeData parameters. The WlanScan function requests that the native 802.11 Wireless LAN driver scan for available wireless networks. The handle hClientHandle was not found in the handle table.įailed to allocate memory for the query results. HClientHandle is NULL or invalid, pInterfaceGuid is NULL, or pReserved is not NULL. If the function fails, the return value may be one of the following return codes. If the function succeeds, the return value is ERROR_SUCCESS. Windows XP with SP3 and Wireless LAN API for Windows XP with SP2: This parameter must be NULL. This parameter points to a WLAN_RAW_DATA structure that may include client provisioning availability information and 802.1X authentication requirements. Windows XP with SP3 and Wireless LAN API for Windows XP with SP2: This parameter must be NULL.Ī pointer to an information element to include in probe requests. When set to NULL, the returned list contains all available networks. The GUID of each wireless LAN interface enabled on a local computer can be determined using the WlanEnumInterfaces function.Ī pointer to a DOT11_SSID structure that specifies the SSID of the network to be scanned. The client's session handle, obtained by a previous call to the WlanOpenHandle function. The WlanScan function requests a scan for available networks on the indicated interface.
0 Comments
Leave a Reply. |