commit 41e249e380d6b227a8b565cca8951f92b95adc59
author Patrick Rohr <prohr@google.com> Mon Apr 04 14:55:09 2022 +0200
committer Patrick Rohr <prohr@google.com> Wed May 25 11:50:30 2022 -0700
tree bd18b092214ac07c63136d2d6e8a4f17fa6355ca
parent 55ef41cfa3312d6942d615ada089a3fa5b8c2a3a

Add NetworkOfferCallback to NetworkInterfaceState

The offer is currently not registered, so this won't do anything yet.

Test: atest EthernetServiceTests
Bug: 197548738
Change-Id: Ic0923708619019bb339d1343ff9027a6a670d11c
Merged-In: Ic0923708619019bb339d1343ff9027a6a670d11c

service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java

diff --git a/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java b/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java
index 09782fd..e2cceda 100644
--- a/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java
+++ b/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java
@@ -46,6 +46,7 @@
 import android.os.RemoteException;
 import android.text.TextUtils;
 import android.util.AndroidRuntimeException;
+import android.util.ArraySet;
 import android.util.Log;
 import android.util.SparseArray;
 
@@ -56,6 +57,7 @@
 
 import java.io.FileDescriptor;
 import java.util.Objects;
+import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 
 /**
@@ -363,12 +365,14 @@
         private final Context mContext;
         private final NetworkProvider mNetworkProvider;
         private final Dependencies mDeps;
+        private final NetworkProvider.NetworkOfferCallback mNetworkOfferCallback;
 
         private static String sTcpBufferSizes = null;  // Lazy initialized.
 
         private boolean mLinkUp;
         private int mLegacyType;
         private LinkProperties mLinkProperties = new LinkProperties();
+        private Set<NetworkRequest> mRequests = new ArraySet<>();
 
         private volatile @Nullable IpClientManager mIpClient;
         private @NonNull NetworkCapabilities mCapabilities;
@@ -469,6 +473,28 @@
             }
         }
 
+        private class EthernetNetworkOfferCallback implements NetworkProvider.NetworkOfferCallback {
+            @Override
+            public void onNetworkNeeded(@NonNull NetworkRequest request) {
+                // When the network offer is first registered, onNetworkNeeded is called with all
+                // existing requests.
+                // ConnectivityService filters requests for us based on the NetworkCapabilities
+                // passed in the registerNetworkOffer() call.
+                mRequests.add(request);
+                // if the network is already started, this is a no-op.
+                start();
+            }
+
+            @Override
+            public void onNetworkUnneeded(@NonNull NetworkRequest request) {
+                mRequests.remove(request);
+                if (mRequests.isEmpty()) {
+                    // not currently serving any requests, stop the network.
+                    stop();
+                }
+            }
+        }
+
         NetworkInterfaceState(String ifaceName, String hwAddress, Handler handler, Context context,
                 @NonNull IpConfiguration ipConfig, @NonNull NetworkCapabilities capabilities,
                 NetworkProvider networkProvider, Dependencies deps) {
@@ -480,6 +506,7 @@
             mContext = context;
             mNetworkProvider = networkProvider;
             mDeps = deps;
+            mNetworkOfferCallback = new EthernetNetworkOfferCallback();
             mHwAddress = hwAddress;
         }