commit c3c5babcb1e798abb4f7ee32173b2753b346c7e9
author Paul Jensen <pauljensen@google.com> Tue May 27 10:19:39 2014 -0400
committer Paul Jensen <pauljensen@google.com> Thu May 29 19:17:06 2014 +0000
tree b1cd67ca056f187a348357019fcd55fa38eb8a6c
parent 80504dbd7469b6c67dfe9ba0eb61943d81096f89

Adjust Network's SocketFactory to restrict host name resolution to that Network

bug: 13885501

Change-Id: Iab9a5a2e060fe261f4be9ba974c1a55fb6b9c98b
(cherry picked from commit 92064edf55ee11967d9cc7529125236ee8e469b2)

core/java/android/net/Network.java

diff --git a/core/java/android/net/Network.java b/core/java/android/net/Network.java
index e489e05..64516e6 100644
--- a/core/java/android/net/Network.java
+++ b/core/java/android/net/Network.java
@@ -94,11 +94,26 @@
             mNetId = netId;
         }
 
+        private void connectToHost(Socket socket, String host, int port) throws IOException {
+            // Lookup addresses only on this Network.
+            InetAddress[] hostAddresses = getAllByName(host);
+            // Try all but last address ignoring exceptions.
+            for (int i = 0; i < hostAddresses.length - 1; i++) {
+                try {
+                    socket.connect(new InetSocketAddress(hostAddresses[i], port));
+                    return;
+                } catch (IOException e) {
+                }
+            }
+            // Try last address.  Do throw exceptions.
+            socket.connect(new InetSocketAddress(hostAddresses[hostAddresses.length - 1], port));
+        }
+
         @Override
         public Socket createSocket(String host, int port, InetAddress localHost, int localPort) throws IOException {
             Socket socket = createSocket();
             socket.bind(new InetSocketAddress(localHost, localPort));
-            socket.connect(new InetSocketAddress(host, port));
+            connectToHost(socket, host, port);
             return socket;
         }
 
@@ -121,7 +136,7 @@
         @Override
         public Socket createSocket(String host, int port) throws IOException {
             Socket socket = createSocket();
-            socket.connect(new InetSocketAddress(host, port));
+            connectToHost(socket, host, port);
             return socket;
         }