Wait for scan response before reporting discovered peripheral

This change waits for a scan response from the peripheral before
reporting it to the user.

Author: sandeepmistry

Diff for: libraries/CurieBLE/src/internal/BLEDeviceManager.cpp

@@ -81,7 +81,7 @@ BLEDeviceManager::BLEDeviceManager():
     memset(_peer_adv_data, 0, sizeof(_peer_adv_data));
     memset(_peer_adv_data_len, 0, sizeof(_peer_adv_data_len));
     memset(_peer_scan_rsp_data, 0, sizeof(_peer_scan_rsp_data));
-    memset(_peer_scan_rsp_data_len, 0, sizeof(_peer_scan_rsp_data_len));
+    memset(_peer_scan_rsp_data_len, -1, sizeof(_peer_scan_rsp_data_len));
     memset(_peer_adv_rssi, 0, sizeof(_peer_adv_rssi));
 
     memset(_peer_adv_connectable, 0, sizeof(_peer_adv_connectable));
@@ -1370,7 +1370,7 @@ BLEDevice BLEDeviceManager::available()
     {
         uint64_t timestamp_delta = timestamp - _peer_adv_mill[i];
         temp = &_peer_adv_buffer[i];
-        if ((timestamp_delta <= 2000) && (max_delta < timestamp_delta))
+        if ((timestamp_delta <= 2000) && (max_delta < timestamp_delta) && _peer_scan_rsp_data_len[i] >= 0)
         {
             // Eable the duplicate filter
             if (_adv_duplicate_filter_enabled && 
@@ -1385,7 +1385,7 @@ BLEDevice BLEDeviceManager::available()
     }
     //pr_debug(LOG_MODULE_BLE, "%s-%d:index %d, i-%d", __FUNCTION__, __LINE__, index, i);
 
-    if (index < BLE_MAX_ADV_BUFFER_CFG)
+    if (index < BLE_MAX_ADV_BUFFER_CFG && _peer_scan_rsp_data_len[index] >= 0)
     {
         temp = &_peer_adv_buffer[index];
         if (true == BLEUtils::macAddressValid(*temp))
@@ -1432,7 +1432,7 @@ bool BLEDeviceManager::setAdvertiseBuffer(const bt_addr_le_t* bt_addr,
             if (max_delta > 2000) // expired
             {
                 index = i;
-                _peer_scan_rsp_data_len[index] = 0; // Invalid the scan response
+                _peer_scan_rsp_data_len[index] = -1; // Invalid the scan response
             }
         }
 

Diff for: libraries/CurieBLE/src/internal/BLEDeviceManager.h

@@ -409,7 +409,7 @@ class BLEDeviceManager
     uint8_t    _peer_adv_data[BLE_MAX_ADV_BUFFER_CFG][BLE_MAX_ADV_SIZE];
     uint8_t    _peer_adv_data_len[BLE_MAX_ADV_BUFFER_CFG];
     uint8_t    _peer_scan_rsp_data[BLE_MAX_ADV_BUFFER_CFG][BLE_MAX_ADV_SIZE];
-    uint8_t    _peer_scan_rsp_data_len[BLE_MAX_ADV_BUFFER_CFG];
+    int8_t     _peer_scan_rsp_data_len[BLE_MAX_ADV_BUFFER_CFG];
     int8_t     _peer_adv_rssi[BLE_MAX_ADV_BUFFER_CFG];
     bool       _peer_adv_connectable[BLE_MAX_ADV_BUFFER_CFG];