Add proxy as another network.

Change-Id: I70cb6ac5604c4f0d6a752a291c40de2445ae98bb

1 files changed, 122 insertions, 0 deletions

diff --git a/core/java/android/net/ProxyDataTracker.java b/core/java/android/net/ProxyDataTracker.java
new file mode 100644
index 0000000..a7d287b
--- /dev/null
+++ b/core/java/android/net/ProxyDataTracker.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import android.content.Context;
+import android.os.Handler;
+import android.os.Message;
+import android.util.Log;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * A data tracker responsible for bringing up and tearing down the system proxy server.
+ *
+ * {@hide}
+ */
+public class ProxyDataTracker extends BaseNetworkStateTracker {
+    private static final String NETWORK_TYPE = "PROXY";
+    private static final String TAG = "ProxyDataTracker";
+
+    // TODO: investigate how to get these DNS addresses from the system.
+    private static final String DNS1 = "8.8.8.8";
+    private static final String DNS2 = "8.8.4.4";
+    private static final String REASON_ENABLED = "enabled";
+
+    private final AtomicInteger mDefaultGatewayAddr = new AtomicInteger(0);
+    private final AtomicInteger mReconnectGeneration = new AtomicInteger(0);
+
+    /**
+     * Create a new ProxyDataTracker
+     */
+    public ProxyDataTracker() {
+        mNetworkInfo = new NetworkInfo(ConnectivityManager.TYPE_PROXY, 0, NETWORK_TYPE, "");
+        // TODO: update available state according to proxy state.
+        mNetworkInfo.setIsAvailable(true);
+        mLinkProperties = new LinkProperties();
+        mLinkCapabilities = new LinkCapabilities();
+
+        try {
+          mLinkProperties.addDns(InetAddress.getByName(DNS1));
+          mLinkProperties.addDns(InetAddress.getByName(DNS2));
+        } catch (UnknownHostException e) {
+          Log.e(TAG, "Could not add DNS address", e);
+        }
+    }
+
+    public Object Clone() throws CloneNotSupportedException {
+        throw new CloneNotSupportedException();
+    }
+
+    /**
+     * Disable connectivity to the network.
+     */
+    public boolean teardown() {
+        // TODO: tell relevant service to tear down proxy.
+        return true;
+    }
+
+    /**
+     * Re-enable proxy data connectivity after a {@link #teardown()}.
+     */
+    public boolean reconnect() {
+        if (!isAvailable()) {
+            Log.w(TAG, "Reconnect requested even though network is disabled. Bailing.");
+            return false;
+        }
+        setTeardownRequested(false);
+        mReconnectGeneration.incrementAndGet();
+        // TODO: tell relevant service to setup proxy. Set state to connected only if setup
+        // succeeds.
+        setDetailedState(NetworkInfo.DetailedState.CONNECTED, REASON_ENABLED, null);
+
+        return true;
+    }
+
+    /**
+     * Fetch default gateway address for the network
+     */
+    public int getDefaultGatewayAddr() {
+        return mDefaultGatewayAddr.get();
+    }
+
+    /**
+     * Return the system properties name associated with the tcp buffer sizes
+     * for this network.
+     */
+    public String getTcpBufferSizesPropName() {
+        return "net.tcp.buffersize.wifi";
+    }
+
+    /**
+     * Record the detailed state of a network, and if it is a
+     * change from the previous state, send a notification to
+     * any listeners.
+     * @param state the new @{code DetailedState}
+     * @param reason a {@code String} indicating a reason for the state change,
+     * if one was supplied. May be {@code null}.
+     * @param extraInfo optional {@code String} providing extra information about the state change
+     */
+    private void setDetailedState(NetworkInfo.DetailedState state, String reason,
+            String extraInfo) {
+        mNetworkInfo.setDetailedState(state, reason, extraInfo);
+        Message msg = getTargetHandler().obtainMessage(EVENT_STATE_CHANGED, mNetworkInfo);
+        msg.sendToTarget();
+    }
+}