diff --git a/include/client/Client.h b/include/client/Client.h
index 836aea8..aaee5ca 100644
--- a/include/client/Client.h
+++ b/include/client/Client.h
@@ -13,7 +13,7 @@ class Client : public StateMachine<Client, void, float> {
 	std::shared_ptr<IClientSocket> m_Socket;
 
   public:
-	Client(const std::shared_ptr<IClientSocket>& a_Socket) : m_Socket(a_Socket) {}
+	Client(const std::shared_ptr<IClientSocket>& a_Socket, const std::string& a_PlayerName);
 
 	void SendPacket(const protocol::PacketBase& a_Packet);
 
diff --git a/include/client/ClientState.h b/include/client/ClientState.h
index f97d613..bf43186 100644
--- a/include/client/ClientState.h
+++ b/include/client/ClientState.h
@@ -6,14 +6,13 @@
 namespace td {
 namespace client {
 
-class ClientState : public Client::State, private utils::SlotGuard {
+class ClientState : public Client::State, public protocol::PacketHandler, private utils::SlotGuard {
   public:
 	ClientState(Client& a_Client);
 	virtual ~ClientState() {}
 
   protected:
 	void SendPacket(const protocol::PacketBase& a_Packet);
-	virtual void HandlePacket(const protocol::PacketBase& a_Packet) {}
 };
 
 }  // namespace server
diff --git a/include/client/state/GameState.h b/include/client/state/GameState.h
index 80e777d..6d4f5d2 100644
--- a/include/client/state/GameState.h
+++ b/include/client/state/GameState.h
@@ -23,8 +23,8 @@ class GameState : public ClientState {
 		return m_CurrentLerp;
 	}
 
-  protected:
-	virtual void HandlePacket(const protocol::PacketBase& a_Packet) override;
+	virtual void Handle(const protocol::packets::LockStepsPacket& a_LockStep) override;
+	virtual void Handle(const protocol::packets::LockStepResponsePacket& a_LockStep) override;
 };
 
 }  // namespace client
diff --git a/include/client/state/LoggingState.h b/include/client/state/LoggingState.h
new file mode 100644
index 0000000..b0d73c4
--- /dev/null
+++ b/include/client/state/LoggingState.h
@@ -0,0 +1,21 @@
+#pragma once
+
+#include <client/ClientState.h>
+#include <td/game/World.h>
+#include <td/simulation/ClientSimulation.h>
+
+namespace td {
+namespace client {
+
+class LoggingState : public ClientState {
+  public:
+	LoggingState(Client& a_Client, const std::string& a_PlayerName);
+	~LoggingState();
+
+	virtual void Update(float a_Delta) override {}
+
+	virtual void Handle(const protocol::packets::PlayerJoinPacket& a_Packet) override;
+};
+
+}  // namespace client
+}  // namespace td
diff --git a/include/server/ConnectionHandler.h b/include/server/ConnectionHandler.h
new file mode 100644
index 0000000..df00059
--- /dev/null
+++ b/include/server/ConnectionHandler.h
@@ -0,0 +1,24 @@
+#pragma once
+
+#include <server/Server.h>
+
+namespace td {
+namespace server {
+
+class IServerSocket;
+
+class ConnectionHandler : public protocol::PacketHandler {
+  private:
+	IServerSocket& m_Server;
+	PlayerID m_Player;
+
+  public:
+	ConnectionHandler(IServerSocket& a_Server, PlayerID a_Player);
+	~ConnectionHandler() = default;
+
+	virtual void Handle(const protocol::packets::PlayerLoginPacket& a_Packet) override;
+	virtual void Handle(const protocol::packets::DisconnectPacket& a_Packet) override;
+};
+
+}  // namespace server
+}  // namespace td
diff --git a/include/server/IServerSocket.h b/include/server/IServerSocket.h
index 79ce209..5fd4aa3 100644
--- a/include/server/IServerSocket.h
+++ b/include/server/IServerSocket.h
@@ -9,13 +9,15 @@ namespace server {
 
 class IServerSocket {
   public:
-	utils::Signal<PlayerID> OnConnect;
-	utils::Signal<PlayerID> OnDisconnect;
+	utils::Signal<PlayerID, const protocol::PlayerInfo&> OnPlayerJoin;
+	utils::Signal<PlayerID> OnPlayerLeave;
 	utils::Signal<PlayerID, const protocol::PacketBase&> OnReceive;
 
 	void Send(PlayerID a_PlayerId, const protocol::PacketBase& a_Packet);
 	void Broadcast(const protocol::PacketBase& a_Packet);
 
+	void Disconnect(PlayerID a_PlayerId);
+
 	IServerSocket() {}
 	virtual ~IServerSocket() {}
 
diff --git a/include/server/ServerState.h b/include/server/ServerState.h
index ef08baf..1fc7db9 100644
--- a/include/server/ServerState.h
+++ b/include/server/ServerState.h
@@ -10,6 +10,8 @@ class ServerState : public Server::State, private utils::SlotGuard {
   public:
 	virtual void HandlePacket(PlayerID a_Id, const protocol::PacketBase& a_Packet) = 0;
 	virtual void Update(float a_Delta) = 0;
+	virtual void OnPlayerJoin(PlayerID a_Id, const td::protocol::PlayerInfo& a_Info) {}
+	virtual void OnPlayerLeave(PlayerID a_Id) {}
 
 	ServerState(Server& a_Server);
 	virtual ~ServerState();
diff --git a/include/td/protocol/packet/Packets.h b/include/td/protocol/packet/Packets.h
index e4ecb34..cd93ee3 100644
--- a/include/td/protocol/packet/Packets.h
+++ b/include/td/protocol/packet/Packets.h
@@ -66,12 +66,18 @@ using WorldDataPacket = PacketMessage<pdata::WorldData, PacketID::WorldData>;
 
 }  // namespace packets
 
-using AllPackets = std::tuple<packets::BeginGamePacket, packets::ChatMessagePacket, packets::DisconnectPacket,
-	packets::KeepAlivePacket, packets::LockStepRequestPacket, packets::LockStepResponsePacket, packets::LockStepsPacket, packets::LoggingSuccessPacket, packets::PlaceTowerPacket,
-	packets::PlayerJoinPacket, packets::PlayerLeavePacket, packets::PlayerLoginPacket, packets::PredictCommandPacket,
-	packets::SpawnTroopPacket, packets::WorldHeaderPacket, packets::WorldDataPacket>;
+using AllPackets =
+	std::tuple<packets::BeginGamePacket, packets::ChatMessagePacket, packets::DisconnectPacket, packets::KeepAlivePacket,
+		packets::LockStepRequestPacket, packets::LockStepResponsePacket, packets::LockStepsPacket, packets::LoggingSuccessPacket,
+		packets::PlaceTowerPacket, packets::PlayerJoinPacket, packets::PlayerLeavePacket, packets::PlayerLoginPacket,
+		packets::PredictCommandPacket, packets::SpawnTroopPacket, packets::WorldHeaderPacket, packets::WorldDataPacket>;
 
-class PacketHandler : public sp::GenericHandler<AllPackets> {};
+class PacketHandler : public sp::GenericHandler<AllPackets> {
+  public:
+	void HandleBase(const PacketBase& a_Packet) {
+		a_Packet.Dispatch(*this);
+	}
+};
 
 using PacketDispatcher = sp::MessageDispatcher<PacketBase>;
 
diff --git a/src/client/Client.cpp b/src/client/Client.cpp
index 8c98606..53710c7 100644
--- a/src/client/Client.cpp
+++ b/src/client/Client.cpp
@@ -1,8 +1,14 @@
 #include <client/Client.h>
 
+#include <client/state/LoggingState.h>
+
 namespace td {
 namespace client {
 
+Client::Client(const std::shared_ptr<IClientSocket>& a_Socket, const std::string& a_PlayerName) : m_Socket(a_Socket) {
+	ChangeState<LoggingState>(a_PlayerName);
+}
+
 void Client::SendPacket(const protocol::PacketBase& a_Packet) {
 	m_Socket->Send(a_Packet);
 }
diff --git a/src/client/ClientState.cpp b/src/client/ClientState.cpp
index fdc2f56..e0ac403 100644
--- a/src/client/ClientState.cpp
+++ b/src/client/ClientState.cpp
@@ -5,7 +5,7 @@ namespace td {
 namespace client {
 
 ClientState::ClientState(Client& a_Client) : Client::State(a_Client) {
-	Connect(m_StateMachine.m_Socket->OnReceive, std::bind(&ClientState::HandlePacket, this, std::placeholders::_1));
+	Connect(m_StateMachine.m_Socket->OnReceive, std::bind(&ClientState::HandleBase, this, std::placeholders::_1));
 }
 
 void ClientState::SendPacket(const protocol::PacketBase& a_Packet) {
diff --git a/src/client/state/GameState.cpp b/src/client/state/GameState.cpp
index c0d9eea..975d6c5 100644
--- a/src/client/state/GameState.cpp
+++ b/src/client/state/GameState.cpp
@@ -3,24 +3,6 @@
 namespace td {
 namespace client {
 
-class ClientHandler : public protocol::PacketHandler {
-  private:
-	sim::ClientSimulation& m_Simulation;
-
-	using protocol::PacketHandler::Handle;
-
-  public:
-	ClientHandler(sim::ClientSimulation& a_Simulation) : m_Simulation(a_Simulation) {}
-
-	void Handle(const protocol::packets::LockStepsPacket& a_LockStep) {
-		m_Simulation.Handle(a_LockStep);
-	}
-
-	void Handle(const protocol::packets::LockStepResponsePacket& a_LockStep) {
-		m_Simulation.Handle(a_LockStep);
-	}
-};
-
 GameState::GameState(Client& a_Client, const std::shared_ptr<game::World>& a_World, std::uint64_t a_StepTime) :
 	ClientState(a_Client), m_World(a_World), m_Simulation(a_World, a_StepTime) {
 	m_Simulation.OnMissingLockSteps.Connect([this](const std::vector<td::StepTime>& a_MissingSteps) {
@@ -28,9 +10,12 @@ GameState::GameState(Client& a_Client, const std::shared_ptr<game::World>& a_Wor
 	});
 }
 
-void GameState::HandlePacket(const protocol::PacketBase& a_Packet) {
-	ClientHandler handler(m_Simulation);
-	a_Packet.Dispatch(handler);
+void GameState::Handle(const protocol::packets::LockStepsPacket& a_LockStep) {
+	m_Simulation.Handle(a_LockStep);
+}
+
+void GameState::Handle(const protocol::packets::LockStepResponsePacket& a_LockStep) {
+	m_Simulation.Handle(a_LockStep);
 }
 
 void GameState::Update(float a_Delta) {
diff --git a/src/client/state/LoggingState.cpp b/src/client/state/LoggingState.cpp
new file mode 100644
index 0000000..e1b3973
--- /dev/null
+++ b/src/client/state/LoggingState.cpp
@@ -0,0 +1,19 @@
+#include <client/state/LoggingState.h>
+
+#include <iostream>
+
+namespace td {
+namespace client {
+
+LoggingState::LoggingState(Client& a_Client, const std::string& a_PlayerName) : ClientState(a_Client) {
+	SendPacket(td::protocol::packets::PlayerLoginPacket(a_PlayerName));
+}
+
+LoggingState::~LoggingState() {}
+
+void LoggingState::Handle(const protocol::packets::PlayerJoinPacket& a_Packet) {
+	std::cout << "[Client] " << a_Packet->m_Player.m_PlayerName << "(" << +a_Packet->m_Player.m_PlayerId << ") joined !\n";
+}
+
+}  // namespace client
+}  // namespace td
diff --git a/src/server/ConnectionHandler.cpp b/src/server/ConnectionHandler.cpp
new file mode 100644
index 0000000..c6afeee
--- /dev/null
+++ b/src/server/ConnectionHandler.cpp
@@ -0,0 +1,24 @@
+#include <server/ConnectionHandler.h>
+
+#include <iostream>
+
+namespace td {
+namespace server {
+
+ConnectionHandler::ConnectionHandler(IServerSocket& a_Server, PlayerID a_Player) : m_Server(a_Server), m_Player(a_Player) {}
+
+void ConnectionHandler::Handle(const protocol::packets::PlayerLoginPacket& a_Packet) {
+	std::cout << "[Server] " << a_Packet->m_PlayerName << " tried to join !\n";
+	protocol::PlayerInfo pInfo{m_Player, a_Packet->m_PlayerName};
+	m_Server.OnPlayerJoin(m_Player, pInfo);
+	m_Server.Broadcast(protocol::packets::PlayerJoinPacket(pInfo));
+	// TODO: send already existing players
+}
+
+void ConnectionHandler::Handle(const protocol::packets::DisconnectPacket& a_Packet) {
+	std::cout << "[Server] " << +m_Player << " wants to disconnect !\n";
+	m_Server.Disconnect(m_Player);
+}
+
+}  // namespace server
+}  // namespace td
diff --git a/src/server/IServerSocket.cpp b/src/server/IServerSocket.cpp
index 3deeb4d..acecd9f 100644
--- a/src/server/IServerSocket.cpp
+++ b/src/server/IServerSocket.cpp
@@ -1,20 +1,25 @@
 #include <server/IServerSocket.h>
 
+#include <server/ConnectionHandler.h>
+
 namespace td {
 namespace server {
 
 void IServerSocket::OnConnectPeer(PeerID a_PeerId) {
+	// here, the client is not a player yet (we need to wait for auth)
 	m_Ids.AddConnection(a_PeerId);
-	OnConnect(m_Ids.GetPlayerId(a_PeerId));
 }
 
 void IServerSocket::OnDisconnectPeer(PeerID a_PeerId) {
-	OnDisconnect(m_Ids.GetPlayerId(a_PeerId));
+	OnPlayerLeave(m_Ids.GetPlayerId(a_PeerId));
 	m_Ids.RemovePeer(a_PeerId);
 }
 
 void IServerSocket::OnReceivePeer(PeerID a_PeerId, const protocol::PacketBase& a_Packet) {
-	OnReceive(m_Ids.GetPlayerId(a_PeerId), a_Packet);
+	auto playerId = m_Ids.GetPlayerId(a_PeerId);
+	ConnectionHandler handler(*this, playerId);
+	a_Packet.Dispatch(handler);
+	OnReceive(playerId, a_Packet);
 }
 
 void IServerSocket::Send(PlayerID a_PlayerId, const protocol::PacketBase& a_Packet) {
@@ -27,5 +32,9 @@ void IServerSocket::Broadcast(const protocol::PacketBase& a_Packet) {
 	}
 }
 
+void IServerSocket::Disconnect(PlayerID a_PlayerId) {
+	OnDisconnectPeer(m_Ids.GetPeerId(a_PlayerId));
+}
+
 }  // namespace server
 }  // namespace td
diff --git a/src/server/ServerState.cpp b/src/server/ServerState.cpp
index 86d76c8..12dd27c 100644
--- a/src/server/ServerState.cpp
+++ b/src/server/ServerState.cpp
@@ -1,5 +1,5 @@
-#include <server/ServerState.h>
 #include <server/Server.h>
+#include <server/ServerState.h>
 
 #include <td/common/StateMachine.h>
 
@@ -8,6 +8,8 @@ namespace server {
 
 ServerState::ServerState(Server& a_Server) : Server::State(a_Server) {
 	Connect(m_StateMachine.m_Socket->OnReceive, std::bind(&ServerState::HandlePacket, this, std::placeholders::_1, std::placeholders::_2));
+	Connect(m_StateMachine.m_Socket->OnPlayerJoin, std::bind(&ServerState::OnPlayerJoin, this, std::placeholders::_1, std::placeholders::_2));
+	Connect(m_StateMachine.m_Socket->OnPlayerLeave, std::bind(&ServerState::OnPlayerLeave, this, std::placeholders::_1));
 }
 
 ServerState::~ServerState() {}
@@ -21,4 +23,4 @@ void ServerState::BroadcastPacket(const protocol::PacketBase& a_Packet) {
 }
 
 }  // namespace server
-}  // namespace 
+}  // namespace td
diff --git a/src/td/display/state/DebugWorldState.cpp b/src/td/display/state/DebugWorldState.cpp
index e1441e5..0616968 100644
--- a/src/td/display/state/DebugWorldState.cpp
+++ b/src/td/display/state/DebugWorldState.cpp
@@ -71,7 +71,7 @@ DebugWorldState::DebugWorldState(Display& a_Display) : DisplayState(a_Display) {
 	// client
 	game::WorldPtr clientWorld = GetWorld();
 	auto clientFakeSocket = client::FakeSocket::Connect(serverFakeSocket);
-	m_Client = std::make_unique<client::Client>(clientFakeSocket);
+	m_Client = std::make_unique<client::Client>(clientFakeSocket, "Player0");
 
 	// render
 	m_Renderer.AddRenderer<render::WorldRenderer>(m_Camera, *clientWorld);