--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.net.http/share/classes/jdk/internal/net/http/frame/SettingsFrame.java	Wed Feb 07 21:45:37 2018 +0000
@@ -0,0 +1,166 @@
+/*
+ * Copyright (c) 2015, 2018, 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 jdk.internal.net.http.frame;
+
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+
+public class SettingsFrame extends Http2Frame {
+
+    private final int[] parameters;
+
+    public static final int TYPE = 0x4;
+
+    // Flags
+    public static final int ACK = 0x1;
+
+    @Override
+    public String flagAsString(int flag) {
+        switch (flag) {
+        case ACK:
+            return "ACK";
+        }
+        return super.flagAsString(flag);
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append(super.toString())
+          .append(" Settings: ");
+
+        for (int i = 0; i < MAX_PARAM; i++) {
+            if (parameters[i] != -1) {
+                sb.append(name(i))
+                  .append("=")
+                  .append(Integer.toString(parameters[i]))
+                  .append(' ');
+            }
+        }
+        return sb.toString();
+    }
+
+    // Parameters
+    public static final int HEADER_TABLE_SIZE = 0x1;
+    public static final int ENABLE_PUSH = 0x2;
+    public static final int MAX_CONCURRENT_STREAMS = 0x3;
+    public static final int INITIAL_WINDOW_SIZE = 0x4;
+    public static final int MAX_FRAME_SIZE = 0x5;
+    public static final int MAX_HEADER_LIST_SIZE = 0x6;
+
+    private String name(int i) {
+        switch (i+1) {
+        case HEADER_TABLE_SIZE:
+            return "HEADER_TABLE_SIZE";
+        case ENABLE_PUSH:
+            return "ENABLE_PUSH";
+        case MAX_CONCURRENT_STREAMS:
+            return "MAX_CONCURRENT_STREAMS";
+        case INITIAL_WINDOW_SIZE:
+            return "INITIAL_WINDOW_SIZE";
+        case MAX_FRAME_SIZE:
+            return "MAX_FRAME_SIZE";
+        case MAX_HEADER_LIST_SIZE:
+            return "MAX_HEADER_LIST_SIZE";
+        }
+        return "unknown parameter";
+    }
+    public static final int MAX_PARAM = 0x6;
+
+    public SettingsFrame(int flags) {
+        super(0, flags);
+        parameters = new int [MAX_PARAM];
+        Arrays.fill(parameters, -1);
+    }
+
+    public SettingsFrame() {
+        this(0);
+    }
+
+    public SettingsFrame(SettingsFrame other) {
+        super(0, other.flags);
+        parameters = Arrays.copyOf(other.parameters, MAX_PARAM);
+    }
+
+    @Override
+    public int type() {
+        return TYPE;
+    }
+
+    public int getParameter(int paramID) {
+        if (paramID > MAX_PARAM) {
+            throw new IllegalArgumentException("illegal parameter");
+        }
+        return parameters[paramID-1];
+    }
+
+    public SettingsFrame setParameter(int paramID, int value) {
+        if (paramID > MAX_PARAM) {
+            throw new IllegalArgumentException("illegal parameter");
+        }
+        parameters[paramID-1] = value;
+        return this;
+    }
+
+    int length() {
+        int len = 0;
+        for (int i : parameters) {
+            if (i != -1) {
+                len  += 6;
+            }
+        }
+        return len;
+    }
+
+    void toByteBuffer(ByteBuffer buf) {
+        for (int i = 0; i < MAX_PARAM; i++) {
+            if (parameters[i] != -1) {
+                buf.putShort((short) (i + 1));
+                buf.putInt(parameters[i]);
+            }
+        }
+    }
+
+    public byte[] toByteArray() {
+        byte[] bytes = new byte[length()];
+        ByteBuffer buf = ByteBuffer.wrap(bytes);
+        toByteBuffer(buf);
+        return bytes;
+    }
+
+    private static final int K = 1024;
+
+    public static SettingsFrame getDefaultSettings() {
+        SettingsFrame f = new SettingsFrame();
+        // TODO: check these values
+        f.setParameter(ENABLE_PUSH, 1);
+        f.setParameter(HEADER_TABLE_SIZE, 4 * K);
+        f.setParameter(MAX_CONCURRENT_STREAMS, 35);
+        f.setParameter(INITIAL_WINDOW_SIZE, 64 * K - 1);
+        f.setParameter(MAX_FRAME_SIZE, 16 * K);
+        return f;
+    }
+}