Fail fast if somebody is adding default routes
bug:2655011
Change-Id: I25da940e024825bc6e1d1ac5fe7b0d951609c1c1
diff --git a/services/java/com/android/server/ConnectivityService.java b/services/java/com/android/server/ConnectivityService.java
index c83a919..5ed23cf 100644
--- a/services/java/com/android/server/ConnectivityService.java
+++ b/services/java/com/android/server/ConnectivityService.java
@@ -2306,6 +2306,20 @@
boolean routesChanged = (routeDiff.removed.size() != 0 || routeDiff.added.size() != 0);
+ // look for a radio-added default route (v4-only for now TODO)
+ RouteInfo[] routes = new RouteInfo[0];
+ try {
+ routes = mNetd.getRoutes(newLp.getInterfaceName());
+ } catch (Exception e) {}
+
+ for (RouteInfo route : routes) {
+ if (route.isDefaultRoute() && route.getGateway() instanceof Inet4Address &&
+ mAddedRoutes.contains(route) == false) {
+ throw new IllegalStateException("Unexpected default route found for interface "
+ + newLp.getInterfaceName());
+ }
+ }
+
for (RouteInfo r : routeDiff.removed) {
if (isLinkDefault || ! r.isDefaultRoute()) {
removeRoute(curLp, r, TO_DEFAULT_TABLE);