Separate single scan and sched scan result handling

Bug: 36479602
Test: compile, unit tests, integration test

Change-Id: I066619ca7c53cf7e8e53ce776c1b419201d522f1

3 files changed, 61 insertions, 14 deletions

diff --git a/service/java/com/android/server/wifi/WifiMonitor.java b/service/java/com/android/server/wifi/WifiMonitor.java
index 15ec8fd77..c4f0bdedb 100644
--- a/service/java/com/android/server/wifi/WifiMonitor.java
+++ b/service/java/com/android/server/wifi/WifiMonitor.java
@@ -87,6 +87,9 @@ public class WifiMonitor {
     public static final int SUP_REQUEST_SIM_AUTH                 = BASE + 16;
 
     public static final int SCAN_FAILED_EVENT                    = BASE + 17;
+    /* Pno scan results are available */
+    public static final int PNO_SCAN_RESULTS_EVENT               = BASE + 18;
+
 
     /* Indicates assoc reject event */
     public static final int ASSOCIATION_REJECTION_EVENT          = BASE + 43;
@@ -464,6 +467,14 @@ public class WifiMonitor {
     }
 
     /**
+     * Broadcast pno scan result event to all the handlers registered for this event.
+     * @param iface Name of iface on which this occurred.
+     */
+    public void broadcastPnoScanResultEvent(String iface) {
+        sendMessage(iface, PNO_SCAN_RESULTS_EVENT);
+    }
+
+    /**
      * Broadcast scan failed event to all the handlers registered for this event.
      * @param iface Name of iface on which this occurred.
      */
diff --git a/service/java/com/android/server/wifi/WificondControl.java b/service/java/com/android/server/wifi/WificondControl.java
index e2a08a853..c88a80426 100644
--- a/service/java/com/android/server/wifi/WificondControl.java
+++ b/service/java/com/android/server/wifi/WificondControl.java
@@ -87,7 +87,7 @@ public class WificondControl {
         @Override
         public void OnPnoNetworkFound() {
             Log.d(TAG, "Pno scan result event");
-            mWifiMonitor.broadcastScanResultEvent(mClientInterfaceName);
+            mWifiMonitor.broadcastPnoScanResultEvent(mClientInterfaceName);
         }
 
         @Override
diff --git a/service/java/com/android/server/wifi/scanner/WificondScannerImpl.java b/service/java/com/android/server/wifi/scanner/WificondScannerImpl.java
index e3058b6c4..9f73a246c 100644
--- a/service/java/com/android/server/wifi/scanner/WificondScannerImpl.java
+++ b/service/java/com/android/server/wifi/scanner/WificondScannerImpl.java
@@ -145,6 +145,8 @@ public class WificondScannerImpl extends WifiScannerImpl implements Handler.Call
         wifiMonitor.registerHandler(mWifiNative.getInterfaceName(),
                 WifiMonitor.SCAN_FAILED_EVENT, mEventHandler);
         wifiMonitor.registerHandler(mWifiNative.getInterfaceName(),
+                WifiMonitor.PNO_SCAN_RESULTS_EVENT, mEventHandler);
+        wifiMonitor.registerHandler(mWifiNative.getInterfaceName(),
                 WifiMonitor.SCAN_RESULTS_EVENT, mEventHandler);
     }
 
@@ -502,6 +504,13 @@ public class WificondScannerImpl extends WifiScannerImpl implements Handler.Call
                 reportScanFailure();
                 processPendingScans();
                 break;
+            case WifiMonitor.PNO_SCAN_RESULTS_EVENT:
+                mAlarmManager.cancel(mScanTimeoutListener);
+                pollLatestScanDataForPno();
+                // TODO(b/36276738): Remove this after we fix b/36231150.
+                Log.d(TAG, "processPendingScans in request of SCHED_SCAN_RESULTS_EVENT");
+                processPendingScans();
+                break;
             case WifiMonitor.SCAN_RESULTS_EVENT:
                 mAlarmManager.cancel(mScanTimeoutListener);
                 pollLatestScanData();
@@ -542,6 +551,46 @@ public class WificondScannerImpl extends WifiScannerImpl implements Handler.Call
         }
     }
 
+    private void pollLatestScanDataForPno() {
+        synchronized (mSettingsLock) {
+            if (mLastScanSettings == null) {
+                 // got a scan before we started scanning or after scan was canceled
+                return;
+            }
+            ArrayList<ScanDetail> nativeResults = mWifiNative.getScanResults();
+            List<ScanResult> hwPnoScanResults = new ArrayList<>();
+            int numFilteredScanResults = 0;
+            for (int i = 0; i < nativeResults.size(); ++i) {
+                ScanResult result = nativeResults.get(i).getScanResult();
+                long timestamp_ms = result.timestamp / 1000; // convert us -> ms
+                if (timestamp_ms > mLastScanSettings.startTime) {
+                    if (mLastScanSettings.hwPnoScanActive) {
+                        hwPnoScanResults.add(result);
+                    }
+                } else {
+                    numFilteredScanResults++;
+                }
+            }
+
+            if (numFilteredScanResults != 0) {
+                Log.d(TAG, "Filtering out " + numFilteredScanResults + " pno scan results.");
+            }
+
+            if (mLastScanSettings.hwPnoScanActive
+                    && mLastScanSettings.pnoScanEventHandler != null) {
+                ScanResult[] pnoScanResultsArray = new ScanResult[hwPnoScanResults.size()];
+                for (int i = 0; i < pnoScanResultsArray.length; ++i) {
+                    ScanResult result = nativeResults.get(i).getScanResult();
+                    pnoScanResultsArray[i] = hwPnoScanResults.get(i);
+                }
+                mLastScanSettings.pnoScanEventHandler.onPnoNetworkFound(pnoScanResultsArray);
+            }
+            // mLastScanSettings is for either single/batched scan or pno scan.
+            // We can safely set it to null when pno scan finishes.
+            mLastScanSettings = null;
+        }
+    }
+
     private void pollLatestScanData() {
         synchronized (mSettingsLock) {
             if (mLastScanSettings == null) {
@@ -553,7 +602,6 @@ public class WificondScannerImpl extends WifiScannerImpl implements Handler.Call
             ArrayList<ScanDetail> nativeResults = mWifiNative.getScanResults();
             List<ScanResult> singleScanResults = new ArrayList<>();
             List<ScanResult> backgroundScanResults = new ArrayList<>();
-            List<ScanResult> hwPnoScanResults = new ArrayList<>();
             int numFilteredScanResults = 0;
             for (int i = 0; i < nativeResults.size(); ++i) {
                 ScanResult result = nativeResults.get(i).getScanResult();
@@ -567,9 +615,6 @@ public class WificondScannerImpl extends WifiScannerImpl implements Handler.Call
                                     result.frequency)) {
                         singleScanResults.add(result);
                     }
-                    if (mLastScanSettings.hwPnoScanActive) {
-                        hwPnoScanResults.add(result);
-                    }
                 } else {
                     numFilteredScanResults++;
                 }
@@ -650,15 +695,6 @@ public class WificondScannerImpl extends WifiScannerImpl implements Handler.Call
                         .onScanStatus(WifiNative.WIFI_SCAN_RESULTS_AVAILABLE);
             }
 
-            if (mLastScanSettings.hwPnoScanActive
-                    && mLastScanSettings.pnoScanEventHandler != null) {
-                ScanResult[] pnoScanResultsArray = new ScanResult[hwPnoScanResults.size()];
-                for (int i = 0; i < pnoScanResultsArray.length; ++i) {
-                    pnoScanResultsArray[i] = hwPnoScanResults.get(i);
-                }
-                mLastScanSettings.pnoScanEventHandler.onPnoNetworkFound(pnoScanResultsArray);
-            }
-
             mLastScanSettings = null;
         }
     }