24 #include "scan.h"
168 			"end of scan list - go back to beginning");  in wpa_supplicant_assoc_try()
207 			"Failed to assign random MAC address for a scan");  in wpas_trigger_scan_cb()
218 			   "Request driver to clear scan cache due to local BSS flush");  in wpas_trigger_scan_cb()
223 	 * Store the obtained vendor scan cookie (if any) in wpa_s context.  in wpas_trigger_scan_cb()
224 	 * The current design is to allow only one scan request on each  in wpas_trigger_scan_cb()
225 	 * interface, hence having this scan cookie stored in wpa_s context is  in wpas_trigger_scan_cb()
228 	 * Revisit this logic if concurrent scan operations per interface  in wpas_trigger_scan_cb()
256 			/* Restore scan_req since we will try to scan again */  in wpas_trigger_scan_cb()
282  * wpa_supplicant_trigger_scan - Request driver to start a scan
284  * @params: Scan parameters
290  * @next: Whether or not to perform this scan as the next radio work
301 		wpa_dbg(wpa_s, MSG_INFO, "Reject scan trigger since one is already pending");  in wpa_supplicant_trigger_scan()
327 		wpa_printf(MSG_DEBUG, "First scan after crossing 6 GHz domain");  in wpa_supplicant_trigger_scan()
332 	    radio_add_work(wpa_s, 0, "scan", next, wpas_trigger_scan_cb,  in wpa_supplicant_trigger_scan()
350 	wpa_dbg(wpa_s, MSG_DEBUG, "Starting delayed sched scan");  in wpa_supplicant_delayed_sched_scan_timeout()
362 	wpa_dbg(wpa_s, MSG_DEBUG, "Sched scan timeout - stopping it");  in wpa_supplicant_sched_scan_timeout()
440 		/* Optimize provisioning state scan based on GO information */  in wpa_supplicant_optimize_freqs()
443 			wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO "  in wpa_supplicant_optimize_freqs()
451 			wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only common "  in wpa_supplicant_optimize_freqs()
465 		 * Perform a single-channel scan if the GO has already been  in wpa_supplicant_optimize_freqs()
466 		 * discovered on another non-P2P interface. Note that a scan  in wpa_supplicant_optimize_freqs()
468 		 * should already have sufficient IEs and scan results will be  in wpa_supplicant_optimize_freqs()
487 						"P2P: Scan only the known GO frequency %d MHz during invitation",  in wpa_supplicant_optimize_freqs()
495 		 * Optimize scan based on GO information during persistent  in wpa_supplicant_optimize_freqs()
505 					"P2P: Scan only GO preferred band %d GHz during invitation",  in wpa_supplicant_optimize_freqs()
523 					"P2P: Scan only GO preferred frequency %d MHz during invitation",  in wpa_supplicant_optimize_freqs()
536 			 * sure we do not get stuck in special invitation scan  in wpa_supplicant_optimize_freqs()
549 		 * Optimize post-provisioning scan based on channel used  in wpa_supplicant_optimize_freqs()
552 		wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz "  in wpa_supplicant_optimize_freqs()
563 		/* Optimize provisioning scan based on already known channel */  in wpa_supplicant_optimize_freqs()
564 		wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz",  in wpa_supplicant_optimize_freqs()
607 	 * parameter of the MLME-SCAN.request primitive represented in units of  in wpas_fils_req_param_add_max_channel()
739 		wpa_printf(MSG_DEBUG, "MLD: Scan including only ML element");  in wpa_supplicant_extra_ies()
930 		wpa_printf(MSG_DEBUG, "Over max scan SSIDs for manual request");  in wpa_add_scan_ssid()
934 	wpa_printf(MSG_DEBUG, "Scan SSID (manual request): %s",  in wpa_add_scan_ssid()
1006 	 * for adding the wildcard scan entry.  in wpa_set_scan_ssids()
1040 		wpa_printf(MSG_DEBUG, "Over max scan SSIDs from scan req: %u",  in wpa_set_ssids_from_scan_req()
1073 		wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled");  in wpa_supplicant_scan()
1078 		wpa_dbg(wpa_s, MSG_DEBUG, "Disconnected - do not scan");  in wpa_supplicant_scan()
1086 		 * the incoming scan request.  in wpa_supplicant_scan()
1088 		wpa_dbg(wpa_s, MSG_DEBUG, "Already scanning - Reschedule the incoming scan req");  in wpa_supplicant_scan()
1095 		wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan");  in wpa_supplicant_scan()
1127 		wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan while P2P operation is in progress");  in wpa_supplicant_scan()
1133 	 * Don't cancel the scan based on ongoing PNO; defer it. Some scans are  in wpa_supplicant_scan()
1135 	 * auto-reconnect, etc). Discarding the scan might hurt these processes.  in wpa_supplicant_scan()
1137 	 * starting PNO, so the periodic 100 ms attempts to run the scan do not  in wpa_supplicant_scan()
1142 		wpa_dbg(wpa_s, MSG_DEBUG, "Defer scan - PNO is in progress");  in wpa_supplicant_scan()
1162 				   "without scan step");  in wpa_supplicant_scan()
1180 		goto scan;  in wpa_supplicant_scan()
1185 		wpa_printf(MSG_DEBUG, "Use specific SSIDs from SCAN command");  in wpa_supplicant_scan()
1192 …wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisio…  in wpa_supplicant_scan()
1200 			   " (peer interface address) for scan",  in wpa_supplicant_scan()
1207 			wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during invitation");  in wpa_supplicant_scan()
1215 					   MACSTR " for scan",  in wpa_supplicant_scan()
1219 			wpa_printf(MSG_DEBUG, "P2P: No specific SSID known for scan during invitation");  in wpa_supplicant_scan()
1248 		 * User-initiated scan request in ap_scan == 2; scan with  in wpa_supplicant_scan()
1254 		 * Perform single-channel single-SSID scan for  in wpa_supplicant_scan()
1259 		wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",  in wpa_supplicant_scan()
1276 		 * Reset the reattach flag so that we fall back to full scan if  in wpa_supplicant_scan()
1277 		 * this scan fails.  in wpa_supplicant_scan()
1288 				wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",  in wpa_supplicant_scan()
1344 		 * waiting a long time for a wildcard scan.  in wpa_supplicant_scan()
1350 			wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for "  in wpa_supplicant_scan()
1356 				"Starting AP scan for specific SSID: %s",  in wpa_supplicant_scan()
1364 			"the scan request");  in wpa_supplicant_scan()
1368 		wpa_dbg(wpa_s, MSG_DEBUG, "Use passive scan based on manual request");  in wpa_supplicant_scan()
1371 			"Use passive scan based on configuration");  in wpa_supplicant_scan()
1375 		wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard "  in wpa_supplicant_scan()
1386 			   "Request driver to clear scan cache due to manual only_new=1 scan");  in wpa_supplicant_scan()
1392 		wpa_dbg(wpa_s, MSG_DEBUG, "Limit manual scan to specified channels");  in wpa_supplicant_scan()
1399 			"Limit select_network scan to specified channels");  in wpa_supplicant_scan()
1405 		wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously "  in wpa_supplicant_scan()
1413 	/* See if user specified frequencies. If so, scan only those. */  in wpa_supplicant_scan()
1417 			"Optimize scan based on conf->initial_freq_list");  in wpa_supplicant_scan()
1421 			"Optimize scan based on conf->freq_list");  in wpa_supplicant_scan()
1434 				wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the "  in wpa_supplicant_scan()
1482 				"Scan a previously specified BSSID " MACSTR  in wpa_supplicant_scan()
1488 				"Scan a previously specified BSSID " MACSTR,  in wpa_supplicant_scan()
1506 scan:  in wpa_supplicant_scan()
1511 	 * is operating there may not be need to scan other channels apart from  in wpa_supplicant_scan()
1535 …wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the current operating channels since all channels are already…  in wpa_supplicant_scan()
1563 		wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan");  in wpa_supplicant_scan()
1567 		/* Restore scan_req since we will try to scan again */  in wpa_supplicant_scan()
1610  * wpa_supplicant_req_scan - Schedule a scan for neighboring access points
1612  * @sec: Number of seconds after which to scan
1613  * @usec: Number of microseconds after which to scan
1615  * This function is used to schedule a scan for neighboring access points after
1624 			"Ignore scan request (%d.%06d sec) on p2p_mgmt interface",  in wpa_supplicant_req_scan()
1632 		wpa_dbg(wpa_s, MSG_DEBUG, "Rescheduling scan request: %d.%06d sec",  in wpa_supplicant_req_scan()
1635 …wpa_dbg(wpa_s, MSG_DEBUG, "Ignore new scan request for %d.%06d sec since an earlier request is sch…  in wpa_supplicant_req_scan()
1638 		wpa_dbg(wpa_s, MSG_DEBUG, "Setting scan request: %d.%06d sec",  in wpa_supplicant_req_scan()
1646  * wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan
1648  * @sec: Number of seconds after which to scan
1649  * @usec: Number of microseconds after which to scan
1690  * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan
1695  * access points repeating the scan continuously.
1740 			 * Normal scan is more reliable and faster for WPS  in wpa_supplicant_req_sched_scan()
1745 			wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of "  in wpa_supplicant_req_sched_scan()
1758 		 * When normal scan can speed up operations, use that for the  in wpa_supplicant_req_sched_scan()
1760 		 * user space sleep more. We do this only if the normal scan  in wpa_supplicant_req_sched_scan()
1764 		wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of "  in wpa_supplicant_req_sched_scan()
1783 		goto scan;  in wpa_supplicant_req_sched_scan()
1837 				"add to active scan ssid: %s",  in wpa_supplicant_req_sched_scan()
1874 	/* See if user specified frequencies. If so, scan only those. */  in wpa_supplicant_req_sched_scan()
1877 			"Optimize scan based on conf->freq_list");  in wpa_supplicant_req_sched_scan()
1888 scan:  in wpa_supplicant_req_sched_scan()
1892 	 * We cannot support multiple scan plans if the scan request includes  in wpa_supplicant_req_sched_scan()
1893 	 * too many SSID's, so in this case use only the last scan plan and make  in wpa_supplicant_req_sched_scan()
1915 				   "Scan interval too long(%u), use the maximum allowed(%u)",  in wpa_supplicant_req_sched_scan()
1931 			"Starting sched scan after %u seconds: interval %u timeout %d",  in wpa_supplicant_req_sched_scan()
1937 			"Starting sched scan after %u seconds (no timeout)",  in wpa_supplicant_req_sched_scan()
1955 		wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate sched scan");  in wpa_supplicant_req_sched_scan()
1961 	/* If we have more SSIDs to scan, add a timeout so we scan them too */  in wpa_supplicant_req_sched_scan()
1988  * wpa_supplicant_cancel_scan - Cancel a scheduled scan request
1991  * This function is used to cancel a scan request scheduled with
1996 	wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling scan request");  in wpa_supplicant_cancel_scan()
2002  * wpa_supplicant_cancel_delayed_sched_scan - Stop a delayed scheduled scan
2005  * This function is used to stop a delayed scheduled scan.
2012 	wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling delayed sched scan");  in wpa_supplicant_cancel_delayed_sched_scan()
2022  * This function is used to stop a periodic scheduled scan.
2032 	wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling sched scan");  in wpa_supplicant_cancel_sched_scan()
2039  * wpa_supplicant_notify_scanning - Indicate possible scan state change
2044  * there may have been a change in scanning (scan started, completed, stopped).
2081  * wpa_scan_get_ie - Fetch a specified information element from a scan result
2082  * @res: Scan result entry
2086  * This function returns the first matching information element in the scan
2114  * wpa_scan_get_vendor_ie - Fetch vendor information element from a scan result
2115  * @res: Scan result entry
2119  * This function returns the first matching information element in the scan
2141  * wpa_scan_get_vendor_ie_beacon - Fetch vendor information from a scan result
2142  * @res: Scan result entry
2146  * This function returns the first matching information element in the scan
2176  * wpa_scan_get_vendor_ie_multi - Fetch vendor IE data from a scan result
2177  * @res: Scan result entry
2182  * specific information elements in the scan result. The caller is responsible
2373 /* Compare function for sorting scan results. Return >0 if @b is considered
2407 		 * The scan result estimates SNR over 20 MHz, while Data frames  in wpa_scan_result_compar()
2484 /* Compare function for sorting scan results when searching a WPS AP for
2539 	wpa_printf(MSG_EXCESSIVE, "Sorted scan results");  in dump_scan_res()
2592  * This function is used to filter out specific BSSIDs from scan reslts mainly
2631 		wpa_printf(MSG_DEBUG, "Filtered out %d scan results",  in filter_scan_res()
3171  * wpa_supplicant_get_scan_results - Get scan results
3174  * @new_scan: Whether a new scan was performed
3176  * Returns: Scan results, %NULL on failure
3178  * This function request the current scan results from the driver and updates
3193 		wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results");  in wpa_supplicant_get_scan_results()
3214 		wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS "  in wpa_supplicant_get_scan_results()
3227 		/* FLUSH command aborted an ongoing scan and these are the  in wpa_supplicant_get_scan_results()
3228 		 * results from the aborted scan. Do not process the results to  in wpa_supplicant_get_scan_results()
3231 			"Do not update BSS table based on pending post-FLUSH scan results");  in wpa_supplicant_get_scan_results()
3247  * wpa_supplicant_update_scan_results - Update scan results from the driver
3253  * currently available scan results from the driver without requesting a new
3254  * scan. This is used in cases where the driver indicates an association
3273  * scan_only_handler - Reports scan results
3278 	wpa_dbg(wpa_s, MSG_DEBUG, "Scan-only results received");  in scan_only_handler()
3459 				   "ongoing sched scan");  in wpas_start_pno()
3468 			   "Schedule PNO after previous sched scan has stopped");  in wpas_start_pno()
3546 		/* Set one scan plan that will run infinitely */  in wpas_start_pno()
3560 		wpa_dbg(wpa_s, MSG_DEBUG, "Limit sched scan to specified channels");  in wpas_start_pno()
3632 			   "scan: MAC randomization type %u != supported=%u",  in wpas_mac_addr_rand_scan_set()
3655 			   "scan: Invalid MAC randomization type=0x%x",  in wpas_mac_addr_rand_scan_set()
3682 			   "scan: Invalid MAC randomization type=0x%x",  in wpas_mac_addr_rand_scan_get_mask()
3699 		    (os_strcmp(work->type, "scan") != 0 &&  in wpas_abort_ongoing_scan()
3700 		     os_strcmp(work->type, "p2p-scan") != 0))  in wpas_abort_ongoing_scan()
3702 		wpa_dbg(wpa_s, MSG_DEBUG, "Abort an ongoing scan");  in wpas_abort_ongoing_scan()
3706 	wpa_dbg(wpa_s, MSG_DEBUG, "No ongoing scan/p2p-scan found to abort");  in wpas_abort_ongoing_scan()
3721 		wpa_printf(MSG_DEBUG, "Clear sched scan plans");  in wpas_sched_scan_plans_set()
3744 				   "Invalid sched scan plan input: %s", token);  in wpas_sched_scan_plans_set()
3750 				   "scan plan %u: Scan interval too long(%u), use the maximum allowed(%u)",  in wpas_sched_scan_plans_set()
3764 				   "scan plan %u: Number of iterations cannot be zero",  in wpas_sched_scan_plans_set()
3772 				   "scan plan %u: Too many iterations(%u), use the maximum allowed(%u)",  in wpas_sched_scan_plans_set()
3780 			   "scan plan %u: interval=%u iterations=%u",  in wpas_sched_scan_plans_set()
3785 		wpa_printf(MSG_ERROR, "Invalid scan plans entry");  in wpas_sched_scan_plans_set()
3791 			   "All scan plans but the last must specify a number of iterations");  in wpas_sched_scan_plans_set()
3795 	wpa_printf(MSG_DEBUG, "scan plan %u (last plan): interval=%u",  in wpas_sched_scan_plans_set()
3800 			   "Too many scheduled scan plans (only %u supported)",  in wpas_sched_scan_plans_set()
3803 			   "Use only the first %u scan plans, and the last one (in infinite loop)",  in wpas_sched_scan_plans_set()
3818 	wpa_printf(MSG_ERROR, "invalid scan plans list");  in wpas_sched_scan_plans_set()
3827  * This function is used to cancel a running scheduled scan and to reset an
3828  * internal scan state to continue with a regular scan on the following
3844 	/* simulate timeout to restart the sched scan */  in wpas_scan_restart_sched_scan()