From a73af005837fa07e01745d50b57fee9f3deebcd8 Mon Sep 17 00:00:00 2001
From: Erik Kline <ek@google.com>
Date: Tue, 26 Jun 2018 18:53:43 +0900
Subject: [PATCH] Push DNS configuration on network validation

Test: as follows
    - built, flashed, booted
    - runtest frameworks-net passes
    - connected to captive portal network,
      saw failed validation attempt (opportunistic),
      passed portal, saw successful revalidation attempt
Bug: 64133961
Bug: 72344805
Bug: 109928338

Change-Id: I0471685c2234af8a8c7f5b2ad3205eb6e36333c5
---
 .../java/com/android/server/ConnectivityService.java  | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index 0b24db0036..28ac784937 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -2191,6 +2191,7 @@ public class ConnectivityService extends IConnectivityManager.Stub
                         updateCapabilities(oldScore, nai, nai.networkCapabilities);
                         // If score has changed, rebroadcast to NetworkFactories. b/17726566
                         if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai);
+                        if (valid) handleFreshlyValidatedNetwork(nai);
                     }
                     updateInetCondition(nai);
                     // Let the NetworkAgent know the state of its network
@@ -2285,6 +2286,16 @@ public class ConnectivityService extends IConnectivityManager.Stub
                 mDefaultRequest.networkCapabilities, nai.networkCapabilities);
     }
 
+    private void handleFreshlyValidatedNetwork(NetworkAgentInfo nai) {
+        if (nai == null) return;
+        // If the Private DNS mode is opportunistic, reprogram the DNS servers
+        // in order to restart a validation pass from within netd.
+        final PrivateDnsConfig cfg = mDnsManager.getPrivateDnsConfig();
+        if (cfg.useTls && TextUtils.isEmpty(cfg.hostname)) {
+            updateDnses(nai.linkProperties, null, nai.network.netId);
+        }
+    }
+
     private void handlePrivateDnsSettingsChanged() {
         final PrivateDnsConfig cfg = mDnsManager.getPrivateDnsConfig();