Pick an upstream interface with valid IP config

As a work around for the issue of picking
the wrong interface, add a check for selecting
an upstream interface that has a valid IP configuration

Bug: 3362306
Change-Id: I01084517cff756c97660b2cfbfa8e9bf26673148

1 files changed, 4 insertions, 4 deletions

diff --git a/services/java/com/android/server/connectivity/Tethering.java b/services/java/com/android/server/connectivity/Tethering.java
index 134b91e..dd9db9a 100644
--- a/services/java/com/android/server/connectivity/Tethering.java
+++ b/services/java/com/android/server/connectivity/Tethering.java
@@ -1233,18 +1233,18 @@ public class Tethering extends INetworkManagementEventObserver.Stub {
                 for (String iface : ifaces) {
                     for (String regex : mUpstreamIfaceRegexs) {
                         if (iface.matches(regex)) {
-                            // verify it is up!
+                            // verify it is active
                             InterfaceConfiguration ifcg = null;
                             try {
                                 ifcg = service.getInterfaceConfig(iface);
+                                if (ifcg.isActive()) {
+                                    return iface;
+                                }
                             } catch (Exception e) {
                                 Log.e(TAG, "Error getting iface config :" + e);
                                 // ignore - try next
                                 continue;
                             }
-                            if (ifcg.interfaceFlags.contains("up")) {
-                                return iface;
-                            }
                         }
                     }
                 }