feature: gestalt networking core

gestalt-networking/build.gradle

@@ -0,0 +1,21 @@
+plugins {
+    id 'java'
+}
+
+group 'org.terasology.gestalt'
+version '8.0.0-SNAPSHOT'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.7.0'
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.7.0'
+    implementation group: 'io.netty', name: 'netty-all', version: '4.1.53.Final'
+
+}
+
+test {
+    useJUnitPlatform()
+}

gestalt-networking/src/main/java/org/terasology/networking/NetworkConfig.java

@@ -0,0 +1,35 @@
+/*
+    reliable.io
+
+    Copyright © 2017 - 2019, The Network Protocol Company, Inc.
+
+    Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+        1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+
+        2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer
+           in the documentation and/or other materials provided with the distribution.
+
+        3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived
+           from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+    WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+    USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+package org.terasology.networking;
+
+public class NetworkConfig {
+    public int fragmentAbove;
+
+    public NetworkConfig setFragmentAbove(int size) {
+        this.fragmentAbove = size;
+        return this;
+    }
+
+}

gestalt-networking/src/main/java/org/terasology/networking/PacketChannel.java

@@ -0,0 +1,84 @@
+package org.terasology.networking;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.socket.DuplexChannel;
+
+public class PacketChannel {
+    private final DuplexChannel channel;
+
+    double time;
+    float packetLost;
+    float sendBandwidthKbps;
+    float receivedBandwidthKbps;
+    float ackedBandwidthKbps;
+
+    int sequence;
+    int numberAcks;
+    byte[] acks;
+
+    SequenceBuffer<SentPacketData> SentPacketBuffer;
+    SequenceBuffer<ReceivedPacketData> receivedPacketBuffer;
+    SequenceBuffer<FragmentReassemblyData> fragmentReassemblyBuffer;
+
+    public static class SequenceBuffer<T> {
+        int sequence;
+        T[] entry;
+        int[] entry_sequence;
+
+        public T getEntry(int seq) {
+            return entry[seq % entry.length];
+        }
+
+        public int getSequence(int seq) {
+            return this.entry_sequence[seq % entry_sequence.length];
+        }
+
+        public int getAcks() {
+            return sequence - 1;
+        }
+
+        public int ackBits() {
+            int bits = 0;
+            for(int i = 0; i < 32; ++i) {
+                int sequence = getAcks() - i;
+                if(getSequence(sequence) == sequence) {
+                    bits |= 1;
+                }
+                bits <<= 1;
+            }
+            return bits;
+        }
+    }
+
+    public static class SentPacketData {
+        public double time;
+        public boolean acked;
+        public int packetBytes;
+    }
+
+    public static class ReceivedPacketData {
+        public double time;
+        public int packetBytes;
+    }
+
+    public static class FragmentReassemblyData {
+        public short sequence;
+        public short ack;
+        public int acks;
+        public int numberFragmentsReceived;
+        public int numberFragmentsTotal;
+        public ByteBuf packedData;
+        public int packedBytes;
+        public int packedHeaderBytes;
+        public ByteBuf fragmentReceived;
+    }
+    public int generateAckBits(int ackBits) {
+        return 0;
+    }
+
+
+
+    public PacketChannel(DuplexChannel channel) {
+        this.channel = channel;
+    }
+}

gestalt-networking/src/main/java/org/terasology/networking/PacketInboundReceiver.java

@@ -0,0 +1,15 @@
+package org.terasology.networking;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+
+public class PacketInboundReceiver extends ChannelInboundHandlerAdapter {
+
+    @Override
+    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+        ByteBuf packet = (ByteBuf) msg;
+
+        super.channelRead(ctx, msg);
+    }
+}

gestalt-networking/src/main/java/org/terasology/networking/Server.java

@@ -0,0 +1,29 @@
+package org.terasology.networking;
+
+import io.netty.bootstrap.Bootstrap;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.channel.socket.nio.NioDatagramChannel;
+import org.terasology.networking.internal.InboundPacketHandler;
+import org.terasology.networking.internal.OutboundPacketHandler;
+
+public class Server {
+
+    public void main() {
+        EventLoopGroup main = new NioEventLoopGroup(); // (1)
+        Bootstrap bootstrap = new Bootstrap();
+        bootstrap.group(main)
+                .channel(NioDatagramChannel.class)
+                .handler(new ChannelInitializer<SocketChannel>() {
+                    @Override
+                    protected void initChannel(SocketChannel ch) throws Exception {
+//                        PacketChannel channel = new PacketChannel(ch, null);
+//                        ch.pipeline().addLast(new InboundPacketHandler(channel));
+//
+//                        ch.pipeline().addLast(new OutboundPacketHandler(channel));
+                    }
+                });
+    }
+}

gestalt-networking/src/main/java/org/terasology/networking/ServerConnectionHandler.java

@@ -0,0 +1,15 @@
+package org.terasology.networking;
+
+import io.netty.channel.ChannelHandlerAdapter;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+
+public class ServerConnectionHandler extends ChannelHandlerAdapter {
+
+    public ServerConnectionHandler() {
+
+    }
+
+
+
+}

gestalt-networking/src/main/java/org/terasology/networking/internal/InboundPacketHandler.java

@@ -0,0 +1,23 @@
+package org.terasology.networking.internal;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.ByteToMessageDecoder;
+import io.netty.handler.codec.MessageToMessageDecoder;
+import org.terasology.networking.PacketChannel;
+
+import java.util.List;
+
+public class InboundPacketHandler extends MessageToMessageDecoder<ByteBuf> {
+    private final PacketChannel channel;
+
+    public InboundPacketHandler(PacketChannel channel) {
+        this.channel = channel;
+
+    }
+
+    @Override
+    protected void decode(ChannelHandlerContext ctx, ByteBuf msg, List<Object> out) throws Exception {
+
+    }
+}

gestalt-networking/src/main/java/org/terasology/networking/internal/OutboundPacketHandler.java

@@ -0,0 +1,28 @@
+package org.terasology.networking.internal;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.MessageToMessageEncoder;
+import org.terasology.networking.NetworkConfig;
+import org.terasology.networking.PacketChannel;
+
+import java.util.List;
+
+public class OutboundPacketHandler extends MessageToMessageEncoder<ByteBuf> {
+    private final PacketChannel channel;
+    private final NetworkConfig config;
+    public OutboundPacketHandler(NetworkConfig config, PacketChannel channel) {
+        super(null);
+        this.channel = channel;
+        this.config = config;
+    }
+
+    @Override
+    protected void encode(ChannelHandlerContext ctx, ByteBuf msg, List<Object> out) throws Exception {
+        int length = msg.readableBytes();
+        if (length <= config.fragmentAbove) {
+        } else {
+
+        }
+    }
+}

gestalt-networking/src/main/java/org/terasology/networking/piplineFactory/PacketPipeline.java

@@ -0,0 +1,28 @@
+package org.terasology.networking.piplineFactory;
+
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.socket.DuplexChannel;
+import io.netty.handler.codec.DatagramPacketDecoder;
+import io.netty.handler.codec.DatagramPacketEncoder;
+import org.terasology.networking.NetworkConfig;
+import org.terasology.networking.PacketChannel;
+import org.terasology.networking.internal.InboundPacketHandler;
+import org.terasology.networking.internal.OutboundPacketHandler;
+
+public class PacketPipeline extends ChannelInitializer<DuplexChannel> {
+    public static String InboundPackets = "INBOUND_PACKETS";
+    public static String OutboundPackets = "INBOUND_PACKETS";
+
+    private final NetworkConfig config;
+
+    public PacketPipeline(NetworkConfig config) {
+        this.config = config;
+    }
+
+    @Override
+    protected void initChannel(DuplexChannel ch) throws Exception {
+        PacketChannel channel = new PacketChannel(ch);
+        ch.pipeline().addLast(InboundPackets, new DatagramPacketDecoder(new InboundPacketHandler(channel)));
+        ch.pipeline().addLast(OutboundPackets, new DatagramPacketEncoder<>(new OutboundPacketHandler(config, channel)));
+    }
+}

settings.gradle

@@ -5,3 +5,5 @@ if (rootProject.projectDir.toPath().resolve("local.properties").toFile().exists(
 } else {
     println "No local.properties file found, bypassing Android elements"
 }
+include 'gestalt-networking'
+