Add network created callback support

Create a network callback to notify network agent after
netd has created the network, so that the NetworkAgent may
wait for this callback and ensure the pre-work to communicate
with netd completed.

Bug: 178725261
Test: make update-api
Change-Id: I8c2ff7bd6980ae838abc5669f9419d62741b8666
Merged-In: I8c2ff7bd6980ae838abc5669f9419d62741b8666

1 files changed, 22 insertions, 0 deletions

diff --git a/framework/src/android/net/NetworkAgent.java b/framework/src/android/net/NetworkAgent.java
index 2eefba9eaf..aea70e3168 100644
--- a/framework/src/android/net/NetworkAgent.java
+++ b/framework/src/android/net/NetworkAgent.java
@@ -362,6 +362,14 @@ public abstract class NetworkAgent {
      */
     public static final int CMD_UNREGISTER_QOS_CALLBACK = BASE + 21;
 
+    /**
+     * Sent by ConnectivityService to {@link NetworkAgent} to inform the agent that its native
+     * network was created and the Network object is now valid.
+     *
+     * @hide
+     */
+    public static final int CMD_NETWORK_CREATED = BASE + 22;
+
     private static NetworkInfo getLegacyNetworkInfo(final NetworkAgentConfig config) {
         // The subtype can be changed with (TODO) setLegacySubtype, but it starts
         // with 0 (TelephonyManager.NETWORK_TYPE_UNKNOWN) and an empty description.
@@ -563,6 +571,10 @@ public abstract class NetworkAgent {
                             msg.arg1 /* QoS callback id */);
                     break;
                 }
+                case CMD_NETWORK_CREATED: {
+                    onNetworkCreated();
+                    break;
+                }
             }
         }
     }
@@ -703,6 +715,11 @@ public abstract class NetworkAgent {
             mHandler.sendMessage(mHandler.obtainMessage(
                     CMD_UNREGISTER_QOS_CALLBACK, qosCallbackId, 0, null));
         }
+
+        @Override
+        public void onNetworkCreated() {
+            mHandler.sendMessage(mHandler.obtainMessage(CMD_NETWORK_CREATED));
+        }
     }
 
     /**
@@ -1011,6 +1028,11 @@ public abstract class NetworkAgent {
     }
 
     /**
+     * Called when ConnectivityService has successfully created this NetworkAgent's native network.
+     */
+    public void onNetworkCreated() {}
+
+    /**
      * Requests that the network hardware send the specified packet at the specified interval.
      *
      * @param slot the hardware slot on which to start the keepalive.