--- a/src/java.base/share/classes/sun/security/ssl/MaxFragmentLengthExtension.java	Fri May 11 14:55:56 2018 -0700
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,139 +0,0 @@
-/*
- * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package sun.security.ssl;
-
-import java.io.IOException;
-import javax.net.ssl.SSLProtocolException;
-
-/*
- * [RFC6066] TLS specifies a fixed maximum plaintext fragment length of
- * 2^14 bytes.  It may be desirable for constrained clients to negotiate
- * a smaller maximum fragment length due to memory limitations or bandwidth
- * limitations.
- *
- * In order to negotiate smaller maximum fragment lengths, clients MAY
- * include an extension of type "max_fragment_length" in the (extended)
- * client hello.  The "extension_data" field of this extension SHALL
- * contain:
- *
- *    enum{
- *        2^9(1), 2^10(2), 2^11(3), 2^12(4), (255)
- *    } MaxFragmentLength;
- *
- * whose value is the desired maximum fragment length.
- */
-final class MaxFragmentLengthExtension extends HelloExtension {
-
-    private static final int MAX_FRAGMENT_LENGTH_512  = 1;      // 2^9
-    private static final int MAX_FRAGMENT_LENGTH_1024 = 2;      // 2^10
-    private static final int MAX_FRAGMENT_LENGTH_2048 = 3;      // 2^11
-    private static final int MAX_FRAGMENT_LENGTH_4096 = 4;      // 2^12
-
-    final int maxFragmentLength;
-
-    MaxFragmentLengthExtension(int fragmentSize) {
-        super(ExtensionType.EXT_MAX_FRAGMENT_LENGTH);
-
-        if (fragmentSize < 1024) {
-            maxFragmentLength = MAX_FRAGMENT_LENGTH_512;
-        } else if (fragmentSize < 2048) {
-            maxFragmentLength = MAX_FRAGMENT_LENGTH_1024;
-        } else if (fragmentSize < 4096) {
-            maxFragmentLength = MAX_FRAGMENT_LENGTH_2048;
-        } else {
-            maxFragmentLength = MAX_FRAGMENT_LENGTH_4096;
-        }
-    }
-
-    MaxFragmentLengthExtension(HandshakeInStream s, int len)
-                throws IOException {
-        super(ExtensionType.EXT_MAX_FRAGMENT_LENGTH);
-
-        // check the extension length
-        if (len != 1) {
-            throw new SSLProtocolException("Invalid " + type + " extension");
-        }
-
-        maxFragmentLength = s.getInt8();
-        if ((maxFragmentLength > 4) || (maxFragmentLength < 1)) {
-            throw new SSLProtocolException("Invalid " + type + " extension");
-        }
-    }
-
-    // Length of the encoded extension, including the type and length fields
-    @Override
-    int length() {
-        return 5;               // 4: extension type and length fields
-                                // 1: MaxFragmentLength field
-    }
-
-    @Override
-    void send(HandshakeOutStream s) throws IOException {
-        s.putInt16(type.id);
-        s.putInt16(1);
-        s.putInt8(maxFragmentLength);
-    }
-
-    int getMaxFragLen() {
-        switch (maxFragmentLength) {
-            case MAX_FRAGMENT_LENGTH_512:
-                return 512;
-            case MAX_FRAGMENT_LENGTH_1024:
-                return 1024;
-            case MAX_FRAGMENT_LENGTH_2048:
-                return 2048;
-            case MAX_FRAGMENT_LENGTH_4096:
-                return 4096;
-        }
-
-        // unlikely to happen
-        return -1;
-    }
-
-    static boolean needFragLenNego(int fragmentSize) {
-        return (fragmentSize > 0) && (fragmentSize <= 4096);
-    }
-
-    static int getValidMaxFragLen(int fragmentSize) {
-        if (fragmentSize < 1024) {
-            return 512;
-        } else if (fragmentSize < 2048) {
-            return 1024;
-        } else if (fragmentSize < 4096) {
-            return 2048;
-        } else if (fragmentSize == 4096) {
-            return 4096;
-        } else {
-            return 16384;
-        }
-    }
-
-    @Override
-    public String toString() {
-        return "Extension " + type + ", max_fragment_length: " +
-                "(2^" + (maxFragmentLength + 8) + ")";
-    }
-}