1 files changed, 0 insertions, 139 deletions
diff --git a/src/java/com/android/internal/net/ipsec/ike/utils/Retransmitter.java b/src/java/com/android/internal/net/ipsec/ike/utils/Retransmitter.java
deleted file mode 100644
index 778d6859..00000000
--- a/src/java/com/android/internal/net/ipsec/ike/utils/Retransmitter.java
+++ /dev/null
@@ -1,139 +0,0 @@
-/*
- * Copyright (C) 2019 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 com.android.internal.net.ipsec.ike.utils;
-
-import static com.android.internal.net.ipsec.ike.IkeSessionStateMachine.CMD_RETRANSMIT;
-
-import android.os.Handler;
-
-import com.android.internal.annotations.VisibleForTesting;
-import com.android.internal.net.ipsec.ike.message.IkeMessage;
-
-/**
- * Retransmitter represents a class that will send a message and trigger delayed retransmissions
- *
- * <p>The Retransmitter class will queue retransmission signals on the provided handler. The owner
- * of this retransmitter instance is expected to wait for the signal, and call retransmit() on the
- * instance of this class.
- */
-public abstract class Retransmitter {
-    private static IBackoffTimeoutCalculator sBackoffTimeoutCalculator =
-            new BackoffTimeoutCalculator();
-
-    /*
-     * Retransmit parameters
-     *
-     * (Re)transmission count   | Relative timeout  | Absolute timeout
-     * -------------------------+-------------------+------------------
-     * 0                        | 500ms             | 500ms
-     * 1                        | 1s                | 1.5s
-     * 2                        | 2s                | 3.5s
-     * 3                        | 4s                | 7.5s
-     * 4                        | 8s                | 15.5s
-     * 5                        | 16s               | 31.5s
-     *
-     * TODO: Add retransmitter configurability
-     */
-    static final double RETRANSMIT_BACKOFF_FACTOR = 2.0;
-    static final long RETRANSMIT_TIMEOUT_MS = 500L;
-    static final int RETRANSMIT_MAX_ATTEMPTS = 5;
-
-    private final Handler mHandler;
-    private final IkeMessage mRetransmitMsg;
-    private int mRetransmitCount = 0;
-
-    public Retransmitter(Handler handler, IkeMessage msg) {
-        mHandler = handler;
-        mRetransmitMsg = msg;
-    }
-
-    /**
-     * Triggers a (re)transmission. Will enqueue a future retransmission signal on the given handler
-     */
-    public void retransmit() {
-        if (mRetransmitMsg == null) {
-            return;
-        }
-
-        // If the failed iteration is beyond the max attempts, clean up and shut down.
-        if (mRetransmitCount > RETRANSMIT_MAX_ATTEMPTS) {
-            handleRetransmissionFailure();
-            return;
-        }
-
-        send(mRetransmitMsg);
-
-        long timeout = sBackoffTimeoutCalculator.getExponentialBackoffTimeout(mRetransmitCount++);
-        mHandler.sendMessageDelayed(mHandler.obtainMessage(CMD_RETRANSMIT, this), timeout);
-    }
-
-    /** Cancels any future retransmissions */
-    public void stopRetransmitting() {
-        mHandler.removeMessages(CMD_RETRANSMIT, this);
-    }
-
-    /** Retrieves the message this retransmitter is tracking */
-    public IkeMessage getMessage() {
-        return mRetransmitMsg;
-    }
-
-    /**
-     * Implementation-provided sender
-     *
-     * <p>For Retransmitter-internal use only.
-     *
-     * @param msg the message to be sent
-     */
-    protected abstract void send(IkeMessage msg);
-
-    /**
-     * Callback for implementations to be informed that we have reached the max retransmissions.
-     *
-     * <p>For Retransmitter-internal use only.
-     */
-    protected abstract void handleRetransmissionFailure();
-
-    /**
-     * IBackoffTimeoutCalculator provides interface for calculating retransmission backoff timeout.
-     *
-     * <p>IBackoffTimeoutCalculator exists so that the interface is injectable for testing.
-     */
-    @VisibleForTesting
-    public interface IBackoffTimeoutCalculator {
-        /** Calculate retransmission backoff timeout */
-        long getExponentialBackoffTimeout(int retransmitCount);
-    }
-
-    private static final class BackoffTimeoutCalculator implements IBackoffTimeoutCalculator {
-        @Override
-        public long getExponentialBackoffTimeout(int retransmitCount) {
-            double expBackoffFactor = Math.pow(RETRANSMIT_BACKOFF_FACTOR, retransmitCount);
-            return (long) (RETRANSMIT_TIMEOUT_MS * expBackoffFactor);
-        }
-    }
-
-    /** Sets IBackoffTimeoutCalculator */
-    @VisibleForTesting
-    public static void setBackoffTimeoutCalculator(IBackoffTimeoutCalculator calculator) {
-        sBackoffTimeoutCalculator = calculator;
-    }
-
-    /** Resets BackoffTimeoutCalculator of retransmitter */
-    @VisibleForTesting
-    public static void resetBackoffTimeoutCalculator() {
-        sBackoffTimeoutCalculator = new BackoffTimeoutCalculator();
-    }
-}