From c6cb931f32e6b953c368159484ded548819b4a80 Mon Sep 17 00:00:00 2001
From: Aaron Huang <huangaaron@google.com>
Date: Thu, 18 Mar 2021 21:35:45 +0800
Subject: [PATCH] Fix IpConfigStore dependencies on framework-connectivity

This change fixes IpConfigStore dependencies on framework-connectivity
hidden APIs.
- Use the version of SystemApi to new RouteInfo.
- Inline the implementation of isIPv4Default() directly because
  isDefaultRoute() is a public API so it can be used in this class.

(cherry-picked from ag/13945685)
Bug: 178777253
Test: FrameworksServicesTests:IpConfigStoreTest
Merged-In: I5ed1bc8bc8bee5b0c795fd8577a2d64628998e51
Change-Id: I5ed1bc8bc8bee5b0c795fd8577a2d64628998e51
---
 .../java/com/android/server/net/IpConfigStore.java     | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/services/core/java/com/android/server/net/IpConfigStore.java b/services/core/java/com/android/server/net/IpConfigStore.java
index 512d2192b9..df1eb6d9fe 100644
--- a/services/core/java/com/android/server/net/IpConfigStore.java
+++ b/services/core/java/com/android/server/net/IpConfigStore.java
@@ -22,7 +22,6 @@ import android.net.IpConfiguration.IpAssignment;
 import android.net.IpConfiguration.ProxySettings;
 import android.net.LinkAddress;
 import android.net.ProxyInfo;
-import android.net.RouteInfo;
 import android.net.StaticIpConfiguration;
 import android.net.Uri;
 import android.util.ArrayMap;
@@ -322,11 +321,14 @@ public class IpConfigStore {
                                 if (in.readInt() == 1) {
                                     gateway = InetAddresses.parseNumericAddress(in.readUTF());
                                 }
-                                RouteInfo route = new RouteInfo(dest, gateway);
-                                if (route.isIPv4Default() && gatewayAddress == null) {
+                                // If the destination is a default IPv4 route, use the gateway
+                                // address unless already set.
+                                if (dest.getAddress() instanceof Inet4Address
+                                        && dest.getPrefixLength() == 0 && gatewayAddress == null) {
                                     gatewayAddress = gateway;
                                 } else {
-                                    loge("Non-IPv4 default or duplicate route: " + route);
+                                    loge("Non-IPv4 default or duplicate route: "
+                                            + dest.getAddress());
                                 }
                             }
                         } else if (key.equals(DNS_KEY)) {