Implémentation de la connection/handshake pour les terminaux de commande

.gitignore

@@ -0,0 +1,2 @@
+/command-terminal/CommandTerminal/nbproject/private/
+/command-terminal/CommandTerminal/build/

command-terminal/CommandTerminal/build.xml

@@ -0,0 +1,73 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- You may freely edit this file. See commented blocks below for -->
+<!-- some examples of how to customize the build. -->
+<!-- (If you delete it and reopen the project it will be recreated.) -->
+<!-- By default, only the Clean and Build commands use this build script. -->
+<!-- Commands such as Run, Debug, and Test only use this build script if -->
+<!-- the Compile on Save feature is turned off for the project. -->
+<!-- You can turn off the Compile on Save (or Deploy on Save) setting -->
+<!-- in the project's Project Properties dialog box.-->
+<project name="CommandTerminal" default="default" basedir=".">
+    <description>Builds, tests, and runs the project CommandTerminal.</description>
+    <import file="nbproject/build-impl.xml"/>
+    <!--
+
+    There exist several targets which are by default empty and which can be 
+    used for execution of your tasks. These targets are usually executed 
+    before and after some main targets. They are: 
+
+      -pre-init:                 called before initialization of project properties
+      -post-init:                called after initialization of project properties
+      -pre-compile:              called before javac compilation
+      -post-compile:             called after javac compilation
+      -pre-compile-single:       called before javac compilation of single file
+      -post-compile-single:      called after javac compilation of single file
+      -pre-compile-test:         called before javac compilation of JUnit tests
+      -post-compile-test:        called after javac compilation of JUnit tests
+      -pre-compile-test-single:  called before javac compilation of single JUnit test
+      -post-compile-test-single: called after javac compilation of single JUunit test
+      -pre-jar:                  called before JAR building
+      -post-jar:                 called after JAR building
+      -post-clean:               called after cleaning build products
+
+    (Targets beginning with '-' are not intended to be called on their own.)
+
+    Example of inserting an obfuscator after compilation could look like this:
+
+        <target name="-post-compile">
+            <obfuscate>
+                <fileset dir="${build.classes.dir}"/>
+            </obfuscate>
+        </target>
+
+    For list of available properties check the imported 
+    nbproject/build-impl.xml file. 
+
+
+    Another way to customize the build is by overriding existing main targets.
+    The targets of interest are: 
+
+      -init-macrodef-javac:     defines macro for javac compilation
+      -init-macrodef-junit:     defines macro for junit execution
+      -init-macrodef-debug:     defines macro for class debugging
+      -init-macrodef-java:      defines macro for class execution
+      -do-jar:                  JAR building
+      run:                      execution of project 
+      -javadoc-build:           Javadoc generation
+      test-report:              JUnit report generation
+
+    An example of overriding the target for project execution could look like this:
+
+        <target name="run" depends="CommandTerminal-impl.jar">
+            <exec dir="bin" executable="launcher.exe">
+                <arg file="${dist.jar}"/>
+            </exec>
+        </target>
+
+    Notice that the overridden target depends on the jar target and not only on 
+    the compile target as the regular run target does. Again, for a list of available 
+    properties which you can use, check the target you are overriding in the
+    nbproject/build-impl.xml file. 
+
+    -->
+</project>

command-terminal/CommandTerminal/manifest.mf

@@ -0,0 +1,3 @@
+Manifest-Version: 1.0
+X-COMMENT: Main-Class will be added automatically by build
+

command-terminal/CommandTerminal/nbproject/genfiles.properties

@@ -0,0 +1,8 @@
+build.xml.data.CRC32=fdad8e2e
+build.xml.script.CRC32=1cd81838
+build.xml.stylesheet.CRC32=8064a381@1.74.1.48
+# This file is used by a NetBeans-based IDE to track changes in generated files such as build-impl.xml.
+# Do not edit this file. You may delete it but then the IDE will never regenerate such files for you.
+nbproject/build-impl.xml.data.CRC32=fdad8e2e
+nbproject/build-impl.xml.script.CRC32=95faf5a3
+nbproject/build-impl.xml.stylesheet.CRC32=876e7a8f@1.74.1.48

command-terminal/CommandTerminal/nbproject/project.properties

@@ -0,0 +1,73 @@
+annotation.processing.enabled=true
+annotation.processing.enabled.in.editor=false
+annotation.processing.processor.options=
+annotation.processing.processors.list=
+annotation.processing.run.all.processors=true
+annotation.processing.source.output=${build.generated.sources.dir}/ap-source-output
+build.classes.dir=${build.dir}/classes
+build.classes.excludes=**/*.java,**/*.form
+# This directory is removed when the project is cleaned:
+build.dir=build
+build.generated.dir=${build.dir}/generated
+build.generated.sources.dir=${build.dir}/generated-sources
+# Only compile against the classpath explicitly listed here:
+build.sysclasspath=ignore
+build.test.classes.dir=${build.dir}/test/classes
+build.test.results.dir=${build.dir}/test/results
+# Uncomment to specify the preferred debugger connection transport:
+#debug.transport=dt_socket
+debug.classpath=\
+    ${run.classpath}
+debug.test.classpath=\
+    ${run.test.classpath}
+# Files in build.classes.dir which should be excluded from distribution jar
+dist.archive.excludes=
+# This directory is removed when the project is cleaned:
+dist.dir=dist
+dist.jar=${dist.dir}/CommandTerminal.jar
+dist.javadoc.dir=${dist.dir}/javadoc
+excludes=
+includes=**
+jar.compress=false
+javac.classpath=
+# Space-separated list of extra javac options
+javac.compilerargs=
+javac.deprecation=false
+javac.processorpath=\
+    ${javac.classpath}
+javac.source=1.8
+javac.target=1.8
+javac.test.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+javac.test.processorpath=\
+    ${javac.test.classpath}
+javadoc.additionalparam=
+javadoc.author=false
+javadoc.encoding=${source.encoding}
+javadoc.noindex=false
+javadoc.nonavbar=false
+javadoc.notree=false
+javadoc.private=false
+javadoc.splitindex=true
+javadoc.use=true
+javadoc.version=false
+javadoc.windowtitle=
+main.class=commandterminal.CommandTerminal
+manifest.file=manifest.mf
+meta.inf.dir=${src.dir}/META-INF
+mkdist.disabled=false
+platform.active=default_platform
+run.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+# Space-separated list of JVM arguments used when running the project.
+# You may also define separate properties like run-sys-prop.name=value instead of -Dname=value.
+# To set system properties for unit tests define test-sys-prop.name=value:
+run.jvmargs=
+run.test.classpath=\
+    ${javac.test.classpath}:\
+    ${build.test.classes.dir}
+source.encoding=UTF-8
+src.dir=src
+test.src.dir=test

command-terminal/CommandTerminal/nbproject/project.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://www.netbeans.org/ns/project/1">
+    <type>org.netbeans.modules.java.j2seproject</type>
+    <configuration>
+        <data xmlns="http://www.netbeans.org/ns/j2se-project/3">
+            <name>CommandTerminal</name>
+            <source-roots>
+                <root id="src.dir"/>
+            </source-roots>
+            <test-roots>
+                <root id="test.src.dir"/>
+            </test-roots>
+        </data>
+    </configuration>
+</project>

command-terminal/CommandTerminal/src/DatagramSocket/AsynchronousDatagramSocket.java

@@ -0,0 +1,75 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package DatagramSocket;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.SocketException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ *
+ * @author lmascaro
+ */
+public class AsynchronousDatagramSocket implements Runnable, AutoCloseable{
+    
+    private final static int MAX_MESSAGE_SIZE = 300;
+    
+    private SynchronizedBuffer<DatagramPacket> buf;
+    private DatagramSocket socket;
+    
+    public AsynchronousDatagramSocket() throws SocketException{
+        this.buf = new SynchronizedBuffer<>();
+        this.socket = new DatagramSocket();
+        new Thread(this).start();
+    }
+    
+    public AsynchronousDatagramSocket(int port) throws SocketException{
+        this.buf = new SynchronizedBuffer<>();
+        this.socket = new DatagramSocket(port);
+        new Thread(this).start();
+    }
+    
+    public void send(DatagramPacket dp) throws IOException{
+        this.socket.send(dp);
+    }
+    
+    public boolean asynchronousReceive(DatagramPacket dp){
+        if(this.buf.available() == 0){
+            return false;
+        }else{
+            dp = this.buf.removeElement(false);
+            return true;
+        }
+    }
+    
+    public void synchronousReceive(DatagramPacket dp){
+        dp = this.buf.removeElement(true);
+    }
+    
+    public boolean available(){
+        return this.buf.available()>0;
+    }
+    
+    @Override
+    public void close(){
+        this.socket.close();
+    }
+
+    @Override
+    public void run() {
+        DatagramPacket packet = new DatagramPacket(new byte[MAX_MESSAGE_SIZE],MAX_MESSAGE_SIZE);
+        try {
+            this.socket.receive(packet);
+            this.buf.addElement(packet);
+        } catch (IOException ex) {
+            Logger.getLogger(AsynchronousDatagramSocket.class.getName()).log(Level.SEVERE, null, ex);
+        }
+    }
+}

command-terminal/CommandTerminal/src/DatagramSocket/SynchronizedBuffer.java

@@ -0,0 +1,46 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package DatagramSocket;
+
+import java.util.LinkedList;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ *
+ * @author lmascaro
+ */
+public class SynchronizedBuffer<T>{
+
+    private LinkedList<T> elements = new LinkedList<T>();
+    
+    public synchronized T removeElement(boolean sync){
+        if(!sync && this.elements.isEmpty()){
+            return null;
+        }
+        
+        while(this.elements.isEmpty()){
+            try {
+                this.wait();
+            } catch (InterruptedException ex) {
+                Logger.getLogger(SynchronizedBuffer.class.getName()).log(Level.SEVERE, null, ex);
+            }
+        }
+        
+        return this.elements.removeFirst();
+    }
+    
+    public synchronized void addElement(T elem){
+        this.elements.add(elem);
+        this.notifyAll();
+    }
+    
+    public synchronized int available(){
+        return this.elements.size();
+    }
+    
+}

command-terminal/CommandTerminal/src/commandterminal/CommandTerminal.java

@@ -0,0 +1,122 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package commandterminal;
+
+import DatagramSocket.AsynchronousDatagramSocket;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.net.InterfaceAddress;
+import java.net.NetworkInterface;
+import java.net.SocketException;
+import java.nio.ByteBuffer;
+import java.util.Enumeration;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ *
+ * @author lmascaro
+ */
+public class CommandTerminal {
+    
+    private final static int SGCA_BROADCAST_PORT = 9999;
+    private final static int MAX_MESSAGE_SIZE = 300;
+    private static AsynchronousDatagramSocket socket;
+
+    /**
+     * @param args the command line arguments
+     */
+    public static void main(String[] args){
+        
+        //the following code go through every interfaces to get broadcasts addresses in order to contact the sgca
+        HashSet<InetAddress> listOfBroadcasts = new HashSet<InetAddress>();
+        Enumeration list;
+        try {
+            list = NetworkInterface.getNetworkInterfaces();
+
+            while(list.hasMoreElements()) {
+                NetworkInterface iface = (NetworkInterface) list.nextElement();
+
+                if(iface == null) continue;
+                //if the interface is not loopback
+                if(!iface.isLoopback() && iface.isUp()) {
+                    
+                    Iterator it = iface.getInterfaceAddresses().iterator();
+                    while (it.hasNext()) {
+                        InterfaceAddress address = (InterfaceAddress) it.next();
+                        if(address == null) continue;
+                        InetAddress broadcast = address.getBroadcast();
+                        if(broadcast != null) 
+                        {
+                            //we found it !
+                            listOfBroadcasts.add(broadcast);
+                        }
+                    }
+                }
+            }
+        } catch (SocketException ex) {
+            System.err.println("Error while getting network interfaces");
+            return;
+        }
+        
+        Integer sgcaPort;
+        InetAddress sgcaAddress;
+        DatagramPacket packet;
+        try {
+            //try to send a request to all the broadcasts (usually there is only one) and wait for the response of the sgca
+            DatagramSocket broadcastSocket = new DatagramSocket();
+            byte[] data;
+            for(InetAddress adr : listOfBroadcasts){
+                data = new byte[1];
+                Integer clientType = 1;
+                data[0] = clientType.byteValue();
+                packet = new DatagramPacket(data,data.length,adr,SGCA_BROADCAST_PORT);
+                broadcastSocket.send(packet);
+                
+            }
+            data = new byte[1];
+            packet = new DatagramPacket(data,data.length);
+            broadcastSocket.receive(packet);
+            sgcaAddress = packet.getAddress();
+            Byte b = new Byte(packet.getData()[0]);
+            sgcaPort = b.intValue(); 
+        } catch (Exception ex) {
+            Logger.getLogger(CommandTerminal.class.getName()).log(Level.SEVERE, null, ex);
+            return;
+        }
+        
+        //from now we assume that the network discovery part went well and we have the port/address of the sgca
+        //send a ISALIVE to ensure the sgca is ready to receive commands
+        DatagramSocket comSock;
+        ByteBuffer buf = ByteBuffer.allocate(1);
+        try { 
+            comSock = new DatagramSocket(sgcaPort);
+            buf.putInt(OpCode.ISALIVE.ordinal());
+            packet = new DatagramPacket(buf.array(),buf.arrayOffset(),sgcaAddress,sgcaPort);
+            comSock.send(packet);
+            
+            //receive response
+            comSock.receive(packet);
+            Byte response = new Byte(packet.getData()[0]);
+            OpCode success = OpCode.values()[response.intValue()];
+            
+            if(success != OpCode.SUCCESS){
+                System.out.println("SGCA Not ready, exiting");
+                return;
+            }
+        } catch (Exception ex) {
+            Logger.getLogger(CommandTerminal.class.getName()).log(Level.SEVERE, null, ex);
+        }
+        
+        //now the sgca is connected and ready, let's start the real work
+        
+    }
+    
+}

command-terminal/CommandTerminal/src/commandterminal/OpCode.java

@@ -0,0 +1,20 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package commandterminal;
+
+/**
+ *
+ * @author lmascaro
+ */
+public enum OpCode {
+    ISALIVE,
+    CAP,
+    ALT,
+    SPEED,
+    SUCCESS,
+    ERROR
+}