commit f7b0625dd797fcaaed302696aceec5be0cf7eb85
author Yuuki Habu <yuuki.habu@sony.com> Thu Sep 06 09:37:55 2018 +0900
committer Yuuki Habu <yuuki.habu@sony.com> Fri Oct 12 14:35:30 2018 +0900
tree da6177fea96e41dec336029623d2e42a84d29ab4
parent 3da2ff5864497f27fcab9f72794f6616bdbe1ba8

To support skip464xlat per Network

To add skip464exlat in NetworkMisc.
NetworkAgent can skip to start 464xlat if need.
(e.g. IMS PDN for Cellular can be disabled)

Device will treat the network as IPv6-only if it is set

Bug: 69949375
Test: Nat464XlatTest, ConnectivityServiceTest

Change-Id: I676a02cb92530d64f29f34e89482a934f3ec4553

core/java/android/net/NetworkMisc.java

diff --git a/core/java/android/net/NetworkMisc.java b/core/java/android/net/NetworkMisc.java
index 69f50a2..daa2640 100644
--- a/core/java/android/net/NetworkMisc.java
+++ b/core/java/android/net/NetworkMisc.java
@@ -65,6 +65,12 @@
      */
     public String subscriberId;
 
+    /**
+     * Set to skip 464xlat. This means the device will treat the network as IPv6-only and
+     * will not attempt to detect a NAT64 via RFC 7050 DNS lookups.
+     */
+    public boolean skip464xlat;
+
     public NetworkMisc() {
     }
 
@@ -75,6 +81,7 @@
             acceptUnvalidated = nm.acceptUnvalidated;
             subscriberId = nm.subscriberId;
             provisioningNotificationDisabled = nm.provisioningNotificationDisabled;
+            skip464xlat = nm.skip464xlat;
         }
     }
 
@@ -90,6 +97,7 @@
         out.writeInt(acceptUnvalidated ? 1 : 0);
         out.writeString(subscriberId);
         out.writeInt(provisioningNotificationDisabled ? 1 : 0);
+        out.writeInt(skip464xlat ? 1 : 0);
     }
 
     public static final Creator<NetworkMisc> CREATOR = new Creator<NetworkMisc>() {
@@ -101,6 +109,7 @@
             networkMisc.acceptUnvalidated = in.readInt() != 0;
             networkMisc.subscriberId = in.readString();
             networkMisc.provisioningNotificationDisabled = in.readInt() != 0;
+            networkMisc.skip464xlat = in.readInt() != 0;
             return networkMisc;
         }
 

services/core/java/com/android/server/connectivity/Nat464Xlat.java

diff --git a/services/core/java/com/android/server/connectivity/Nat464Xlat.java b/services/core/java/com/android/server/connectivity/Nat464Xlat.java
index f523d59..f96f6e8 100644
--- a/services/core/java/com/android/server/connectivity/Nat464Xlat.java
+++ b/services/core/java/com/android/server/connectivity/Nat464Xlat.java
@@ -93,7 +93,9 @@
         // We only run clat on networks that don't have a native IPv4 address.
         final boolean hasIPv4Address =
                 (nai.linkProperties != null) && nai.linkProperties.hasIPv4Address();
-        return supported && connected && !hasIPv4Address;
+        final boolean skip464xlat =
+                (nai.networkMisc != null) && nai.networkMisc.skip464xlat;
+        return supported && connected && !hasIPv4Address && !skip464xlat;
     }
 
     /**