diff --git a/.gitignore b/.gitignore
index a181cc2..daaf70a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -231,4 +231,92 @@ Network Trash Folder
 Temporary Items
 .apdisk
 
-# End of https://www.gitignore.io/api/osx,java,linux,maven,eclipse,intellij
+### Intellij+all ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# AWS User-specific
+.idea/**/aws.xml
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# SonarLint plugin
+.idea/sonarlint/
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### Intellij+all Patch ###
+# Ignore everything but code style settings and run configurations
+# that are supposed to be shared within teams.
+
+.idea/*
+
+!.idea/codeStyles
+!.idea/runConfigurations
+
+# End of https://www.toptal.com/developers/gitignore/api/intellij+all
\ No newline at end of file
diff --git a/src/main/java/pr/tp2/udp/chat/ChatMulticast.java b/src/main/java/pr/tp2/udp/chat/ChatMulticast.java
new file mode 100644
index 0000000..aa303f4
--- /dev/null
+++ b/src/main/java/pr/tp2/udp/chat/ChatMulticast.java
@@ -0,0 +1,16 @@
+package pr.tp2.udp.chat;
+
+public class ChatMulticast {
+
+    private static class Receiver implements Runnable {
+        @Override
+        public void run() {
+            // Code de reception et affichage
+        }
+    }
+
+    public static void main(String[] args) {
+        // Lecture au clavier et envoie du message
+        // Vous pouvez utiliser Scanner : https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Scanner.html
+    }
+}
diff --git a/src/main/java/pr/tp2/udp/discovery/Discovery.java b/src/main/java/pr/tp2/udp/discovery/Discovery.java
deleted file mode 100644
index ba94fe5..0000000
--- a/src/main/java/pr/tp2/udp/discovery/Discovery.java
+++ /dev/null
@@ -1,55 +0,0 @@
-package pr.tp2.udp.discovery;
-
-public class Discovery {
-
-	public static void sendWhois(String id) {
-		// Envoie un message Whois
-	}
-
-	public static void sendLeaving(String id) {
-		// Envoie un message Leaving
-	}
-
-	public static void sendIAM(String id, String url) {
-		// Envoie un message IAM
-	}
-
-	public static void listenAndReply() {
-		// Ecoute et affiche les évennements IAM,LEAVING
-
-		// Réponds aux WHOIS si ID = ID
-		// URL du service :
-		String ID = "051005022";
-		String URL = "https://istic.univ-rennes1.fr/";
-
-	}
-
-	public static void main(String[] args) {
-		String cmd = args[0], url = null, id = null;
-		if (args.length > 1) {
-			id = args[1];
-		}
-		if (args.length == 3) {
-			url = args[2];
-		}
-
-		switch (cmd) {
-		case "listen":
-			listenAndReply();
-			break;
-		case "iam":
-			sendIAM(id, url);
-			break;
-		case "leaving":
-			sendLeaving(id);
-			break;
-		case "whois":
-			sendWhois(id);
-			break;
-		default:
-			System.out.println("Erreur de commande");
-			break;
-
-		}
-	}
-}
diff --git a/src/main/java/pr/tp2/udp/discovery/TestDiscovery.java b/src/main/java/pr/tp2/udp/discovery/TestDiscovery.java
deleted file mode 100644
index ed173df..0000000
--- a/src/main/java/pr/tp2/udp/discovery/TestDiscovery.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package pr.tp2.udp.discovery;
-
-public class TestDiscovery {
-
-	public static void main(String[] args) throws InterruptedException {
-		Runnable listener = () -> {
-			Discovery.listenAndReply();
-		};
-		new Thread(listener).start();
-
-		Discovery.sendWhois("051005022");
-		Discovery.sendIAM("tftp", "127.0.0.1:6969");
-
-		Thread.sleep(10000);
-
-	}
-}