47  * I send an event when a scan request is sent. The scan_rsp_pending flag
50  * 2) Interleave sending scan requests to different advertisers? I guess I need
51  * a list of advertisers to which I sent a scan request and have yet to
52  * receive a scan response from? Implement this.
60     #error "Cannot have more than 255 scan response entries!"
122  * Structure used to store advertisers. This is used to limit sending scan
139 /* Contains list of advertisers that we have heard scan responses from */
169     /* In case scan has been disabled or there is other aux ptr in progress  in ble_ll_aux_scan_cb()
292  * ble ll scan req pdu make
350          * being tracked when doing an active scan (see Core 5.0, Vol 6, Part B,  in ble_ll_scan_req_pdu_make()
367     /* Construct the scan request */  in ble_ll_scan_req_pdu_make()
521  * Do scan machine clean up on PHY disabled
621  * Checks to see if we have received a scan response from this advertiser.
626  * @return int 0: have not received a scan response; 1 otherwise.
921  * NOTE: connect requests and scan requests are not passed here
1039      *      scan just make sanity check that we have proper combination of  in ble_ll_scan_start()
1050      * Set transmit end callback to NULL in case we transmit a scan request.  in ble_ll_scan_start()
1103     /* If there is a still a scan response pending, we have failed! */  in ble_ll_scan_start()
1158     /* Well, in case we missed to schedule scan, lets move to next stan interval.  in ble_ll_scan_get_current_scan_win()
1164         /* If we missed scan window, make sure we update scan channel */  in ble_ll_scan_get_current_scan_win()
1172  * Called to determine if we are inside or outside the scan window. If we
1173  * are inside the scan window it means that the device should be receiving
1174  * on the scan channel.
1180  * @return int 0: inside scan window 1: outside scan window
1296     /* Only set state if we are currently in a scan window */  in ble_ll_scan_sm_stop()
1349     /* Reset scan request backoff parameters to default */  in ble_ll_scan_sm_start()
1354     /* Forget filtered advertisers from previous scan. */  in ble_ll_scan_sm_start()
1413     /* Other PHY already wanted to scan. Allow it */  in ble_ll_scan_start_next_phy()
1482         /* Aux scan in progress. Wait */  in ble_ll_scan_event_proc()
1489     /* Make sure the scan window start time and channel are up to date. */  in ble_ll_scan_event_proc()
1493     /* Check if we are in scan window */  in ble_ll_scan_event_proc()
1501         /* In case continous scan lets assume we area always in the window*/  in ble_ll_scan_event_proc()
1505     /* Determine on/off state based on scan window */  in ble_ll_scan_event_proc()
1528      * is post the scan schedule end event.  in ble_ll_scan_event_proc()
1624  * ble ll scan rx pdu start
1651         /* If adv ind or scan ind, we may send scan request */  in ble_ll_scan_rx_isr_start()
1665          * If this is the first PDU after we sent the scan response (as  in ble_ll_scan_rx_isr_start()
1666          * denoted by the scan rsp pending flag), we set a bit in the ble  in ble_ll_scan_rx_isr_start()
1667          * header so the link layer can check to see if the scan request  in ble_ll_scan_rx_isr_start()
1669          * work for successful scan requests. If failed, we do the work here.  in ble_ll_scan_rx_isr_start()
2040      * Note that in aux chain and aux scan response packets  in ble_ll_scan_parse_ext_hdr()
2226      * to restart scanning and handle a failed scan request. Note that we  in ble_ll_scan_rx_isr_end()
2331      * lets do a copy of pointers for scan request  in ble_ll_scan_rx_isr_end()
2365     /* Should we send a scan request? */  in ble_ll_scan_rx_isr_end()
2379             /* Dont send scan request if we have sent one to this advertiser */  in ble_ll_scan_rx_isr_end()
2385         /* Dont send scan request if we have sent one to this advertiser */  in ble_ll_scan_rx_isr_end()
2390         /* Better not be a scan response pending */  in ble_ll_scan_rx_isr_end()
2410                 /* Set "waiting for scan response" flag */  in ble_ll_scan_rx_isr_end()
2414                     /* Let's keep the aux ptr as a reference to scan rsp */  in ble_ll_scan_rx_isr_end()
2471  * Scan timer callback; means that the scan window timeout has been reached
2476  * @param arg Pointer to scan state machine.
2499      * If we timed out waiting for a response, the scan response pending  in ble_ll_scan_wfr_timer_exp()
2500      * flag should be set. Deal with scan backoff. Put device back into rx.  in ble_ll_scan_wfr_timer_exp()
2652                 /* Scan response completed successfully */  in ble_ll_hci_send_ext_adv_report()
2697     /* Set scan response check flag */  in ble_ll_scan_rx_pkt_in()
2700     /* We dont care about scan requests or connect requests */  in ble_ll_scan_rx_pkt_in()
2761      * XXX: The BLE spec is a bit unclear here. What if we get a scan  in ble_ll_scan_rx_pkt_in()
2764      * that we have heard a scan response from?  in ble_ll_scan_rx_pkt_in()
2768          * If this is a scan response in reply to a request we sent we need  in ble_ll_scan_rx_pkt_in()
2773              * We could also check the timing of the scan reponse; make sure  in ble_ll_scan_rx_pkt_in()
2774              * that it is relatively close to the end of the scan request but  in ble_ll_scan_rx_pkt_in()
2782                 /* We have received a scan response. Add to list */  in ble_ll_scan_rx_pkt_in()
2785                 /* Perform scan request backoff procedure */  in ble_ll_scan_rx_pkt_in()
2861              * Data were trimmed so no need to scan this chain anymore. Also  in ble_ll_scan_rx_pkt_in()
2863              * case we managed to scan something before events were processed.  in ble_ll_scan_rx_pkt_in()
2887             /* XXX: For now let us consider scan response as succeed in the backoff context,  in ble_ll_scan_rx_pkt_in()
2888              * after first scan response packet is received.  in ble_ll_scan_rx_pkt_in()
2889              * I guess we should marked it succeed after complete scan response is received,  in ble_ll_scan_rx_pkt_in()
2917      * If the scan response check bit is set and we are pending a response,  in ble_ll_scan_rx_pkt_in()
2918      * we have failed the scan request (as we would have reset the scan rsp  in ble_ll_scan_rx_pkt_in()
2945     /* Get the scan interval and window */  in ble_ll_scan_set_scan_params()
2952     /* Check scan type */  in ble_ll_scan_set_scan_params()
2977     /* Store scan parameters */  in ble_ll_scan_set_scan_params()
2997     /* Check scan type */  in ble_ll_check_scan_params()
3106     /* If host requests continuous scan for 2 PHYs, we double scan interval  in ble_ll_set_ext_scan_params()
3107      * and split it for two equal scan windows between 2 PHYs  in ble_ll_set_ext_scan_params()
3177  * ble ll scan set enable
3179  *  HCI scan set enable command processing function
3281     /* we can store those upfront regardless of start scan result since scan is  in ble_ll_scan_set_enable()
3431     /* If host request for continuous scan if 2 PHYs are requested, we split  in ble_ll_scan_ext_initiator_start()
3499      * The RPA we used is in connect request or scan request and is the  in ble_ll_scan_get_local_rpa()
3552     /* Clear scan parameters in case re-initialized */  in ble_ll_scan_common_init()
3578     /* Initialize extended scan timers */  in ble_ll_scan_common_init()
3586     /* Get a scan request mbuf (packet header) and attach to state machine */  in ble_ll_scan_common_init()
3610     /* stop extended scan timers */  in ble_ll_scan_reset()
3616     /* Free the scan request pdu */  in ble_ll_scan_reset()
3627     /* clear memory pool for AUX scan results */  in ble_ll_scan_reset()
3636  * ble ll scan init