Dump latest unfiltered scan result

Bug: 63810310
Test: compile, unit tests, manual test

Change-Id: I090aaacb00c3a774edd5c353037f2265f3bf138f

4 files changed, 60 insertions, 11 deletions

diff --git a/service/java/com/android/server/wifi/scanner/HalWifiScannerImpl.java b/service/java/com/android/server/wifi/scanner/HalWifiScannerImpl.java
index 211e62a0d..0fadd804b 100644
--- a/service/java/com/android/server/wifi/scanner/HalWifiScannerImpl.java
+++ b/service/java/com/android/server/wifi/scanner/HalWifiScannerImpl.java
@@ -27,6 +27,9 @@ import com.android.server.wifi.Clock;
 import com.android.server.wifi.WifiMonitor;
 import com.android.server.wifi.WifiNative;
 
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
+
 /**
  * WifiScanner implementation that takes advantage of the gscan HAL API
  * The gscan API is used to perform background scans and wificond is used for oneshot scans.
@@ -151,4 +154,9 @@ public class HalWifiScannerImpl extends WifiScannerImpl implements Handler.Callb
             return mWificondScannerDelegate.shouldScheduleBackgroundScanForHwPno();
         }
     }
+
+    @Override
+    protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
+        mWificondScannerDelegate.dump(fd, pw, args);
+    }
 }
diff --git a/service/java/com/android/server/wifi/scanner/WifiScannerImpl.java b/service/java/com/android/server/wifi/scanner/WifiScannerImpl.java
index e0fb535dd..5281b3abe 100644
--- a/service/java/com/android/server/wifi/scanner/WifiScannerImpl.java
+++ b/service/java/com/android/server/wifi/scanner/WifiScannerImpl.java
@@ -26,6 +26,8 @@ import com.android.server.wifi.WifiInjector;
 import com.android.server.wifi.WifiMonitor;
 import com.android.server.wifi.WifiNative;
 
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
 import java.util.Comparator;
 
 /**
@@ -158,4 +160,6 @@ public abstract class WifiScannerImpl {
      * @return true if background scan needs to be started, false otherwise.
      */
     public abstract boolean shouldScheduleBackgroundScanForHwPno();
+
+    protected abstract void dump(FileDescriptor fd, PrintWriter pw, String[] args);
 }
diff --git a/service/java/com/android/server/wifi/scanner/WifiScanningServiceImpl.java b/service/java/com/android/server/wifi/scanner/WifiScanningServiceImpl.java
index af874b9e2..ab2a5dca3 100644
--- a/service/java/com/android/server/wifi/scanner/WifiScanningServiceImpl.java
+++ b/service/java/com/android/server/wifi/scanner/WifiScanningServiceImpl.java
@@ -2156,6 +2156,9 @@ public class WifiScanningServiceImpl extends IWifiScanner.Stub {
             }
             pw.println();
         }
+        if (mScannerImpl != null) {
+            mScannerImpl.dump(fd, pw, args);
+        }
     }
 
     void logScanRequest(String request, ClientInfo ci, int id, WorkSource workSource,
diff --git a/service/java/com/android/server/wifi/scanner/WificondScannerImpl.java b/service/java/com/android/server/wifi/scanner/WificondScannerImpl.java
index fd7fddb73..84105ee61 100644
--- a/service/java/com/android/server/wifi/scanner/WificondScannerImpl.java
+++ b/service/java/com/android/server/wifi/scanner/WificondScannerImpl.java
@@ -32,6 +32,8 @@ import com.android.server.wifi.WifiMonitor;
 import com.android.server.wifi.WifiNative;
 import com.android.server.wifi.scanner.ChannelHelper.ChannelCollection;
 
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
 import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -81,6 +83,7 @@ public class WificondScannerImpl extends WifiScannerImpl implements Handler.Call
     private boolean mBackgroundScanPaused = false;
     private ScanBuffer mBackgroundScanBuffer = new ScanBuffer(SCAN_BUFFER_CAPACITY);
 
+    private ArrayList<ScanDetail> mNativeScanResults;
     private WifiScanner.ScanData mLatestSingleScanResult =
             new WifiScanner.ScanData(0, 0, new ScanResult[0]);
 
@@ -535,11 +538,11 @@ public class WificondScannerImpl extends WifiScannerImpl implements Handler.Call
                  // got a scan before we started scanning or after scan was canceled
                 return;
             }
-            ArrayList<ScanDetail> nativeResults = mWifiNative.getScanResults();
+            mNativeScanResults = mWifiNative.getScanResults();
             List<ScanResult> hwPnoScanResults = new ArrayList<>();
             int numFilteredScanResults = 0;
-            for (int i = 0; i < nativeResults.size(); ++i) {
-                ScanResult result = nativeResults.get(i).getScanResult();
+            for (int i = 0; i < mNativeScanResults.size(); ++i) {
+                ScanResult result = mNativeScanResults.get(i).getScanResult();
                 long timestamp_ms = result.timestamp / 1000; // convert us -> ms
                 if (timestamp_ms > mLastScanSettings.startTime) {
                     if (mLastScanSettings.hwPnoScanActive) {
@@ -556,11 +559,8 @@ public class WificondScannerImpl extends WifiScannerImpl implements Handler.Call
 
             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);
-                }
+                ScanResult[] pnoScanResultsArray =
+                        hwPnoScanResults.toArray(new ScanResult[hwPnoScanResults.size()]);
                 mLastScanSettings.pnoScanEventHandler.onPnoNetworkFound(pnoScanResultsArray);
             }
             // On pno scan result event, we are expecting a mLastScanSettings for pno scan.
@@ -598,12 +598,12 @@ public class WificondScannerImpl extends WifiScannerImpl implements Handler.Call
             }
 
             if (DBG) Log.d(TAG, "Polling scan data for scan: " + mLastScanSettings.scanId);
-            ArrayList<ScanDetail> nativeResults = mWifiNative.getScanResults();
+            mNativeScanResults = mWifiNative.getScanResults();
             List<ScanResult> singleScanResults = new ArrayList<>();
             List<ScanResult> backgroundScanResults = new ArrayList<>();
             int numFilteredScanResults = 0;
-            for (int i = 0; i < nativeResults.size(); ++i) {
-                ScanResult result = nativeResults.get(i).getScanResult();
+            for (int i = 0; i < mNativeScanResults.size(); ++i) {
+                ScanResult result = mNativeScanResults.get(i).getScanResult();
                 long timestamp_ms = result.timestamp / 1000; // convert us -> ms
                 if (timestamp_ms > mLastScanSettings.startTime) {
                     if (mLastScanSettings.backgroundScanActive) {
@@ -772,6 +772,40 @@ public class WificondScannerImpl extends WifiScannerImpl implements Handler.Call
         return false;
     }
 
+    @Override
+    protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
+        synchronized (mSettingsLock) {
+            pw.println("Latest native scan results:");
+            if (mNativeScanResults != null && mNativeScanResults.size() != 0) {
+                long nowMs = mClock.getElapsedSinceBootMillis();
+                pw.println("    BSSID              Frequency  RSSI  Age(sec)   SSID "
+                        + "                                Flags");
+                for (ScanDetail scanDetail : mNativeScanResults) {
+                    ScanResult r = scanDetail.getScanResult();
+                    long timeStampMs = r.timestamp / 1000;
+                    String age;
+                    if (timeStampMs <= 0) {
+                        age = "___?___";
+                    } else if (nowMs < timeStampMs) {
+                        age = "  0.000";
+                    } else if (timeStampMs < nowMs - 1000000) {
+                        age = ">1000.0";
+                    } else {
+                        age = String.format("%3.3f", (nowMs - timeStampMs) / 1000.0);
+                    }
+                    String ssid = r.SSID == null ? "" : r.SSID;
+                    pw.printf("  %17s  %9d  %5d   %7s    %-32s  %s\n",
+                              r.BSSID,
+                              r.frequency,
+                              r.level,
+                              age,
+                              String.format("%1.32s", ssid),
+                              r.capabilities);
+                }
+            }
+        }
+    }
+
     private static class LastScanSettings {
         public long startTime;