diff --git a/Projet_POO/src/liste/ConstanteListeUtilisateur.java b/Projet_POO/src/liste/ConstanteListeUtilisateur.java
new file mode 100644
index 0000000..6b5d0f5
--- /dev/null
+++ b/Projet_POO/src/liste/ConstanteListeUtilisateur.java
@@ -0,0 +1,9 @@
+package liste;
+
+public class ConstanteListeUtilisateur {
+	
+	static public String IP_BROADCAST = "255.255.255.255";
+	static public int SIZE_ORDRE = 100;
+	static public int NUM_PORT_SERVER = 2000;
+
+}
diff --git a/Projet_POO/src/nom/GestionnaireListeUtilisateur.java b/Projet_POO/src/liste/GestionnaireListeUtilisateur.java
similarity index 51%
rename from Projet_POO/src/nom/GestionnaireListeUtilisateur.java
rename to Projet_POO/src/liste/GestionnaireListeUtilisateur.java
index 16c72ed..86a4d3a 100644
--- a/Projet_POO/src/nom/GestionnaireListeUtilisateur.java
+++ b/Projet_POO/src/liste/GestionnaireListeUtilisateur.java
@@ -1,12 +1,13 @@
-package nom;
+package liste;
 
 import java.util.ArrayList;
-import java.util.List;
 
 public class GestionnaireListeUtilisateur {
 	
 	//contient la liste Utilisateur à jour
-	public List<TypeListeUtilisateur> listeUtilisateur = new ArrayList<TypeListeUtilisateur>();
+	public static ArrayList<TypeListeUtilisateur> listeUtilisateur = new ArrayList<TypeListeUtilisateur>();
+	
+	
 	
 	//Instance du gestionnaire de liste
 	static private GestionnaireListeUtilisateur uniqueInstance = null;
@@ -23,44 +24,26 @@ public class GestionnaireListeUtilisateur {
 		
 	}
 	
-	//crée la liste utilisateur initial ?
-	private GestionnaireListeUtilisateur() {
+	
+	//récupérer la liste lors de la conenxion //TODO
+	public void recuperationListeInitiale() {
 		
+		//ici ?
 	}
 	
 	
 	//ecoute le port de broadcast pour recevoir le message personnalisé
-	public String ecoute() {
-		int portEcoute = 2000;
-		UdpUnicastServer server = new UdpUnicastServer(portEcoute);
-		
-		
-		
-		
-		return "";
+	public void ecoute() {  //static ??
+		Thread ecouteThread = new Thread(new UdpUnicastServer(ConstanteListeUtilisateur.NUM_PORT_SERVER));
+		ecouteThread.start();
 	}
 	
 	//envoie en Broadcast aux autres liste les infos sur cet utilisateur
-	public void envoie() {
-		
-		
+	public void envoie(String message) { 
+		Thread envoieThread = new Thread(new UdpBroadcastClient(ConstanteListeUtilisateur.NUM_PORT_SERVER, message));
+		envoieThread.start();
 	}
 	
 	
-	//met à jour la Liste d'utilisateur
-	public void MAJListeUtilisateur() {
-		ajouteUtilisateur();
-		supprimeUtilisateur();
-		
-	}
 	
-	// detecte les nouveaux utilisateurs entrant et les ajoute à la liste
-	private void ajouteUtilisateur() {
-		
-	}
-	
-	// detecte les utilisateurs sortant et les supprime de la liste
-	private void supprimeUtilisateur() {
-			
-	}
 }
diff --git a/Projet_POO/src/liste/MainUDPBroad.java b/Projet_POO/src/liste/MainUDPBroad.java
new file mode 100644
index 0000000..467a4cf
--- /dev/null
+++ b/Projet_POO/src/liste/MainUDPBroad.java
@@ -0,0 +1,30 @@
+package liste;
+
+//import java.util.concurrent.ExecutorService;
+//import java.util.concurrent.Executors;
+
+public class MainUDPBroad {
+
+	public static void main(String[] args) {
+		int portServer = ConstanteListeUtilisateur.NUM_PORT_SERVER;
+		
+		UdpBroadcastServer server = new UdpBroadcastServer(portServer);
+		UdpBroadcastClient client = new UdpBroadcastClient(portServer, "add$$$" + 77 + "$$$Delta$$$LocalHost");
+		UdpBroadcastClient client1 = new UdpBroadcastClient(portServer, "add$$$" + 75 + "$$$Beta$$$LocalHost");
+		UdpBroadcastClient client2 = new UdpBroadcastClient(portServer, "add$$$" + 11 + "$$$Alpha$$$LocalHost");
+		
+		Thread ts = new Thread(server);
+		Thread t0 = new Thread(client);
+		Thread t1 = new Thread(client1);
+		Thread t2 = new Thread(client2);
+		
+		ts.start();
+		t0.start();
+		t1.start();
+		t2.start();
+		
+		//ExecutorService executorService = Executors.newFixedThreadPool(2);
+		//executorService.submit(server);
+		//executorService.submit(client);
+	}
+}
diff --git a/Projet_POO/src/liste/MainUDPMulti.java b/Projet_POO/src/liste/MainUDPMulti.java
new file mode 100644
index 0000000..0048dc2
--- /dev/null
+++ b/Projet_POO/src/liste/MainUDPMulti.java
@@ -0,0 +1,26 @@
+package liste;
+
+//import java.util.concurrent.ExecutorService;
+//import java.util.concurrent.Executors;
+
+public class MainUDPMulti {
+
+	public static void main(String[] args) {  //ne marche pas : soit route (routeur) soit code soit 2 ....
+		int portServer = 2000;
+		int multicastPort = 7000;
+		
+		UdpMulticastServer server = new UdpMulticastServer(portServer, multicastPort);
+		UdpMulticastClient client = new UdpMulticastClient(portServer, multicastPort);
+		
+		Thread ts = new Thread(server);
+		Thread t0 = new Thread(client);
+
+		
+		ts.start();
+		t0.start();
+		
+		//ExecutorService executorService = Executors.newFixedThreadPool(2);
+		//executorService.submit(server);
+		//executorService.submit(client);
+	}
+}
diff --git a/Projet_POO/src/liste/MainUDPUni.java b/Projet_POO/src/liste/MainUDPUni.java
new file mode 100644
index 0000000..adc4c92
--- /dev/null
+++ b/Projet_POO/src/liste/MainUDPUni.java
@@ -0,0 +1,31 @@
+package liste;
+
+//import java.util.concurrent.ExecutorService;
+//import java.util.concurrent.Executors;
+
+public class MainUDPUni {
+
+	public static void main(String[] args) {
+		int portServer = 2000;
+
+		
+		UdpUnicastServer server = new UdpUnicastServer(portServer);
+		UdpUnicastClient client = new UdpUnicastClient(portServer, "LocalHost");
+		UdpUnicastClient client1 = new UdpUnicastClient(portServer, "LocalHost");
+		UdpUnicastClient client2 = new UdpUnicastClient(portServer, "LocalHost");
+		
+		Thread ts = new Thread(server);
+		Thread t0 = new Thread(client);
+		Thread t1 = new Thread(client1);
+		Thread t2 = new Thread(client2);
+		
+		ts.start();
+		t0.start();
+		t1.start();
+		t2.start();
+		
+		//ExecutorService executorService = Executors.newFixedThreadPool(2);
+		//executorService.submit(server);
+		//executorService.submit(client);
+	}
+}
diff --git a/Projet_POO/src/liste/TraitementCmdListe.java b/Projet_POO/src/liste/TraitementCmdListe.java
new file mode 100644
index 0000000..e7465e5
--- /dev/null
+++ b/Projet_POO/src/liste/TraitementCmdListe.java
@@ -0,0 +1,93 @@
+package liste;
+
+import java.util.ArrayList;
+import java.util.concurrent.Semaphore;
+
+public class TraitementCmdListe implements Runnable{
+
+	String message;
+	Semaphore semaphore;
+	
+	public TraitementCmdListe(String cmd, Semaphore semaphore) {
+		this.message = cmd;
+		this.semaphore = semaphore;
+		
+	}
+	
+	public void run() {
+		try {
+			
+				String[] cmd = message.split("\\$\\$\\$", 0); //vérifier longueur 4 ?? //TODO
+				String ordre = cmd[0];
+				String id = cmd[1];
+				String nom = cmd[2];
+				String ip = cmd[3];
+	
+				
+				semaphore.acquireUninterruptibly();
+				System.out.println("bloqué");
+				
+				if (ordre.equals("delete")) {
+					GestionnaireListeUtilisateur.listeUtilisateur = supprimeUtilisateur(GestionnaireListeUtilisateur.listeUtilisateur, id);
+				}
+				
+				if (ordre.equals("add")) {
+					GestionnaireListeUtilisateur.listeUtilisateur = ajouteUtilisateur(GestionnaireListeUtilisateur.listeUtilisateur, id, nom, ip);
+				}
+				System.out.println("libéré");
+				semaphore.release();
+				
+				
+				//Thread.sleep(1000);
+				//System.out.println("fini " + id);
+				System.out.println(GestionnaireListeUtilisateur.listeUtilisateur.get(0).nom);
+			
+			} catch (Exception e) {}
+		
+		}
+	
+		
+	
+	
+		// detecte les nouveaux utilisateurs entrant et les ajoute à la liste
+		private ArrayList<TypeListeUtilisateur> ajouteUtilisateur(ArrayList<TypeListeUtilisateur> listeUtilisateur, String id, String nom, String ip) {
+			
+			boolean inListe = false;
+			
+			//si il est dans la liste on le renomme
+			for (int i=0; i<listeUtilisateur.size(); i++) {
+				if (listeUtilisateur.get(i).id.equals(id)) {
+					inListe = true;
+					TypeListeUtilisateur utilisateur = listeUtilisateur.get(i);
+					utilisateur.nom = nom;
+					
+					listeUtilisateur.set(i, utilisateur);
+				}
+			}
+			
+			//s'il n'est pas dans la liste on la rajoute
+			if (!inListe) {
+				listeUtilisateur.add(new TypeListeUtilisateur(id, nom, ip));
+				
+			}
+			
+			return listeUtilisateur;
+					
+		}
+		
+		
+		
+		// detecte les utilisateurs sortant et les supprime de la liste
+		private ArrayList<TypeListeUtilisateur> supprimeUtilisateur(ArrayList<TypeListeUtilisateur> listeUtilisateur, String id) {
+			
+			for (int i=0; i<listeUtilisateur.size(); i++) {
+				if (listeUtilisateur.get(i).id.equals(id)) {
+					
+					listeUtilisateur.remove(i);
+				}
+			}
+			
+			return listeUtilisateur;
+			
+		}
+}
diff --git a/Projet_POO/src/liste/TypeListeUtilisateur.java b/Projet_POO/src/liste/TypeListeUtilisateur.java
new file mode 100644
index 0000000..07e52df
--- /dev/null
+++ b/Projet_POO/src/liste/TypeListeUtilisateur.java
@@ -0,0 +1,15 @@
+package liste;
+
+public class TypeListeUtilisateur {
+
+	public String nom;
+	public String id;
+	public String ip;
+	
+	public TypeListeUtilisateur(String id, String nom, String ip) {
+		this.id = id;
+		this.nom = nom;
+		this.ip = ip;
+		
+	}
+}
diff --git a/Projet_POO/src/liste/UdpBroadcastClient.java b/Projet_POO/src/liste/UdpBroadcastClient.java
new file mode 100644
index 0000000..a017556
--- /dev/null
+++ b/Projet_POO/src/liste/UdpBroadcastClient.java
@@ -0,0 +1,47 @@
+package liste;
+
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.net.SocketException;
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.UnknownHostException;
+
+public class UdpBroadcastClient implements Runnable{
+	
+	private final int serverPort;
+	private final String message;  //ordre$$$id$$$nom$$$ip
+	
+	public UdpBroadcastClient(int serverPort, String message) {
+		this.serverPort = serverPort;
+		this.message = message;
+	}
+
+
+	public void run() {
+		try(DatagramSocket serverSocket = new DatagramSocket()){
+
+			serverSocket.setBroadcast(true); 
+			DatagramPacket datagramPacket = new DatagramPacket(
+					message.getBytes(),
+					message.length(),
+					InetAddress.getByName(ConstanteListeUtilisateur.IP_BROADCAST),
+					serverPort
+			);
+
+			serverSocket.send(datagramPacket);
+			serverSocket.close(); //fermer en cas de coupure abrupte ?? //TODO
+
+		} catch (SocketException e) {
+			e.printStackTrace();
+		} catch (UnknownHostException e) {
+			e.printStackTrace();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		
+		
+		
+	}
+	
+}
diff --git a/Projet_POO/src/liste/UdpBroadcastServer.java b/Projet_POO/src/liste/UdpBroadcastServer.java
new file mode 100644
index 0000000..7e22f0e
--- /dev/null
+++ b/Projet_POO/src/liste/UdpBroadcastServer.java
@@ -0,0 +1,48 @@
+package liste;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.SocketException;
+import java.util.concurrent.Semaphore;
+
+
+public class UdpBroadcastServer implements Runnable{
+	
+	private final int serverPort;
+	
+	
+	public UdpBroadcastServer(int serverPort) {
+		this.serverPort = serverPort;
+	}
+	
+	
+	public void run() {
+		try(DatagramSocket serverSocket = new DatagramSocket(serverPort)){ //fermeture ne cas de coupure abrupte ?? //TODO
+			
+			Semaphore semaphore = new Semaphore(1, true);
+			
+			byte[] buffer = new byte[ConstanteListeUtilisateur.SIZE_ORDRE];
+			//serverSocket.setSoTimeout(3000);
+			while (true) {
+				DatagramPacket datagramPacket = new DatagramPacket(buffer, 0, buffer.length);
+				serverSocket.receive(datagramPacket);
+				
+				String receivedMessage = new String(datagramPacket.getData(), 0, datagramPacket.getLength());
+				System.out.println(receivedMessage);
+				
+				Thread t = new Thread( new TraitementCmdListe(receivedMessage, semaphore) );
+				t.start();
+
+				
+			}
+			
+		} catch (SocketException e) {
+			e.printStackTrace();
+		} catch (IOException e) {
+			System.out.println("Timedout. CLient is closing.");
+		}
+	}
+	
+
+}
diff --git a/Projet_POO/src/liste/UdpMulticastClient.java b/Projet_POO/src/liste/UdpMulticastClient.java
new file mode 100644
index 0000000..d6a6386
--- /dev/null
+++ b/Projet_POO/src/liste/UdpMulticastClient.java
@@ -0,0 +1,52 @@
+package liste;
+
+import java.net.InetAddress;
+import java.net.SocketException;
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.UnknownHostException;
+import java.net.MulticastSocket;
+
+public class UdpMulticastClient implements Runnable{
+	
+	private final int serverPort;
+	private final int multicastPort;
+	
+	public UdpMulticastClient(int serverPort, int multicastPort) {
+		this.serverPort = serverPort;
+		this.multicastPort = multicastPort;
+	}
+
+
+	public void run() {
+		try{
+			Thread.sleep(1000);
+			
+			InetAddress groupe = InetAddress.getByName("230.0.0.1");
+			MulticastSocket multicastSocket = new MulticastSocket(multicastPort); // port ?
+			String message = "add$$$" + 77 + "$$$Roger$$$LocalHost";   //ordre$$$id$$$nom$$$ip
+			DatagramPacket datagramPacket = new DatagramPacket(
+					message.getBytes(),
+					message.length(),
+					groupe,
+					serverPort
+			);
+			System.out.println("ici");
+			multicastSocket.send(datagramPacket);
+			System.out.println("ici");
+			multicastSocket.close();
+
+			
+		} catch (SocketException e) {
+			e.printStackTrace();
+		} catch (UnknownHostException e) {
+			e.printStackTrace();
+		} catch (IOException e) {
+			e.printStackTrace();
+		} catch (Exception e) {}
+		
+		
+		
+	}
+	
+}
diff --git a/Projet_POO/src/liste/UdpMulticastServer.java b/Projet_POO/src/liste/UdpMulticastServer.java
new file mode 100644
index 0000000..8211525
--- /dev/null
+++ b/Projet_POO/src/liste/UdpMulticastServer.java
@@ -0,0 +1,63 @@
+package liste;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.InetAddress;
+import java.net.MulticastSocket;
+import java.net.NetworkInterface;
+import java.net.SocketException;
+import java.util.concurrent.Semaphore;
+import java.net.NetworkInterface;
+import java.net.InetSocketAddress;
+
+
+public class UdpMulticastServer implements Runnable{
+	
+	private final int serverPort;
+	private final int multicastPort;
+	
+	public UdpMulticastServer(int serverPort, int multicastPort) {
+		this.serverPort = serverPort;
+		this.multicastPort = multicastPort;
+	}
+	
+	
+	public void run() {
+		try(MulticastSocket multicastSocket = new MulticastSocket(serverPort)){
+			
+			InetAddress multicastAddr = InetAddress.getByName("229.0.0.1");
+			InetSocketAddress groupe = new InetSocketAddress(multicastAddr, multicastPort);
+			NetworkInterface netIf = NetworkInterface.getByIndex(0);
+			
+			
+			multicastSocket.joinGroup(groupe, netIf);
+			
+			Semaphore semaphore = new Semaphore(1, true);
+			
+			byte[] buffer = new byte[65507];
+			//serverSocket.setSoTimeout(3000);
+			while (true) {
+				DatagramPacket datagramPacket = new DatagramPacket(buffer, 0, buffer.length);
+				System.out.println("serverAttente");
+				multicastSocket.receive(datagramPacket);
+				System.out.println("serverReçu");
+				String receivedMessage = new String(datagramPacket.getData(), 0, datagramPacket.getLength());
+				System.out.println(receivedMessage);
+				
+				Thread t = new Thread( new TraitementCmdListe(receivedMessage, semaphore) );
+				t.start();
+
+				
+			}
+			
+			
+		} catch (SocketException e) {
+			e.printStackTrace();
+			
+		} catch (IOException e) {
+			System.out.println("Timedout. CLient is closing.");
+		}
+	}
+	
+
+}
diff --git a/Projet_POO/src/nom/UdpUnicastClient.java b/Projet_POO/src/liste/UdpUnicastClient.java
similarity index 72%
rename from Projet_POO/src/nom/UdpUnicastClient.java
rename to Projet_POO/src/liste/UdpUnicastClient.java
index d940914..60b1a2a 100644
--- a/Projet_POO/src/nom/UdpUnicastClient.java
+++ b/Projet_POO/src/liste/UdpUnicastClient.java
@@ -1,4 +1,4 @@
-package nom;
+package liste;
 
 import java.net.DatagramSocket;
 import java.net.InetAddress;
@@ -8,13 +8,11 @@ import java.net.DatagramPacket;
 import java.net.UnknownHostException;
 
 public class UdpUnicastClient implements Runnable{
-	
-	private final int clientPort;
+
 	private final int serverPort;
 	private final String serverIP;
 	
-	public UdpUnicastClient(int clientPort, int serverPort, String serverIP) {
-		this.clientPort = clientPort;
+	public UdpUnicastClient(int serverPort, String serverIP) {
 		this.serverPort = serverPort;
 		this.serverIP = serverIP;
 		
@@ -22,9 +20,9 @@ public class UdpUnicastClient implements Runnable{
 
 
 	public void run() {
-		try(DatagramSocket serverSocket = new DatagramSocket(clientPort)){
-			for (int i = 0; i<3; i++) {
-				String message = "Message number " + i;
+		try(DatagramSocket serverSocket = new DatagramSocket()){
+			//for (int i = 0; i<3; i++) {
+				String message = "add$$$" + 77 + "$$$Roger$$$LocalHost";   //ordre$$$id$$$nom$$$ip
 				DatagramPacket datagramPacket = new DatagramPacket(
 						message.getBytes(),
 						message.length(),
@@ -32,7 +30,7 @@ public class UdpUnicastClient implements Runnable{
 						serverPort
 				);
 				serverSocket.send(datagramPacket);
-			}
+			//}
 			
 		} catch (SocketException e) {
 			e.printStackTrace();
diff --git a/Projet_POO/src/nom/UdpUnicastServer.java b/Projet_POO/src/liste/UdpUnicastServer.java
similarity index 76%
rename from Projet_POO/src/nom/UdpUnicastServer.java
rename to Projet_POO/src/liste/UdpUnicastServer.java
index 8ede7a7..580a1e6 100644
--- a/Projet_POO/src/nom/UdpUnicastServer.java
+++ b/Projet_POO/src/liste/UdpUnicastServer.java
@@ -1,9 +1,10 @@
-package nom;
+package liste;
 
 import java.io.IOException;
 import java.net.DatagramPacket;
 import java.net.DatagramSocket;
 import java.net.SocketException;
+import java.util.concurrent.Semaphore;
 
 
 public class UdpUnicastServer implements Runnable{
@@ -17,7 +18,10 @@ public class UdpUnicastServer implements Runnable{
 	
 	
 	public void run() {
-		try(DatagramSocket serverSocket = new DatagramSocket(serverPort)){
+		try(DatagramSocket serverSocket = new DatagramSocket(serverPort)){ //fermeture ne cas de coupure abrupte ?? //TODO
+			
+			Semaphore semaphore = new Semaphore(1, true);
+			
 			byte[] buffer = new byte[65507];
 			//serverSocket.setSoTimeout(3000);
 			while (true) {
@@ -26,6 +30,11 @@ public class UdpUnicastServer implements Runnable{
 				
 				String receivedMessage = new String(datagramPacket.getData(), 0, datagramPacket.getLength());
 				System.out.println(receivedMessage);
+				
+				Thread t = new Thread( new TraitementCmdListe(receivedMessage, semaphore) );
+				t.start();
+
+				
 			}
 			
 		} catch (SocketException e) {
@@ -34,5 +43,6 @@ public class UdpUnicastServer implements Runnable{
 			System.out.println("Timedout. CLient is closing.");
 		}
 	}
+	
 
 }
diff --git a/Projet_POO/src/nom/MainUDP.java b/Projet_POO/src/nom/MainUDP.java
deleted file mode 100644
index e3064ff..0000000
--- a/Projet_POO/src/nom/MainUDP.java
+++ /dev/null
@@ -1,19 +0,0 @@
-package nom;
-
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-
-public class MainUDP {
-
-	public static void main(String[] args) {
-		int portServer = 7001;
-		int portClient = 7000;
-		
-		UdpUnicastServer server = new UdpUnicastServer(portServer);
-		UdpUnicastClient client = new UdpUnicastClient(portClient, portServer, "LocalHost");
-		
-		ExecutorService executorService = Executors.newFixedThreadPool(2);
-		executorService.submit(server);
-		executorService.submit(client);
-	}
-}
diff --git a/Projet_POO/src/nom/TypeListeUtilisateur.java b/Projet_POO/src/nom/TypeListeUtilisateur.java
deleted file mode 100644
index 37dc1ce..0000000
--- a/Projet_POO/src/nom/TypeListeUtilisateur.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package nom;
-
-public class TypeListeUtilisateur {
-
-	public String nom;
-	public String id;
-	public String IP;
-}