diff --git a/build/TD2_Rezo.o b/build/TD2_Rezo.o
index 9b8aceb..6afbe4c 100644
Binary files a/build/TD2_Rezo.o and b/build/TD2_Rezo.o differ
diff --git a/build/api/mictcp_core.o b/build/api/mictcp_core.o
index 9a5e3e6..204edd2 100644
Binary files a/build/api/mictcp_core.o and b/build/api/mictcp_core.o differ
diff --git a/build/apps/client.o b/build/apps/client.o
index e6910dd..a367026 100644
Binary files a/build/apps/client.o and b/build/apps/client.o differ
diff --git a/build/apps/gateway.o b/build/apps/gateway.o
index 5bdb278..f3f008a 100644
Binary files a/build/apps/gateway.o and b/build/apps/gateway.o differ
diff --git a/build/apps/server.o b/build/apps/server.o
index 428ff7d..aa40aaa 100644
Binary files a/build/apps/server.o and b/build/apps/server.o differ
diff --git a/build/client b/build/client
index d72886a..cd85c04 100755
Binary files a/build/client and b/build/client differ
diff --git a/build/gateway b/build/gateway
index 4f11008..7e3b76b 100755
Binary files a/build/gateway and b/build/gateway differ
diff --git a/build/mictcp.o b/build/mictcp.o
index ecfabbd..d036891 100644
Binary files a/build/mictcp.o and b/build/mictcp.o differ
diff --git a/build/server b/build/server
index ebe03b3..486810f 100755
Binary files a/build/server and b/build/server differ
diff --git a/src/mictcp.c b/src/mictcp.c
index fc6c4c8..ee23b85 100644
--- a/src/mictcp.c
+++ b/src/mictcp.c
@@ -1,10 +1,11 @@
+#include <stdio.h>
 #include <mictcp.h>
 #include <api/mictcp_core.h>
 #define NBR_SOCKETS 1024
-#define TIMEOUT_DEFAUT 1000
+#define TIMEOUT_DEFAUT 5
 #define WINDOW_SIZE 10
 #define LOSS_ACCEPTABILITY 0 // sur 10
-
+#define ATTENTE_ACK 1
 
 //================================== STRUCTURES =============================
 
@@ -40,7 +41,7 @@ int established = 0;
 pthread_t attente_ack_tid;
 pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
 pthread_cond_t end_accept_cond = PTHREAD_COND_INITIALIZER;
-
+char debug=1;
 
 //================================== SIGNATURES DES FONCTIONS PRIVEES =============================
 
@@ -54,7 +55,8 @@ void * attente_ack(void * arg);
 void error(char * message, int line);
 void addValueCircularBuff(circularBuffer* buffer, char Value );
 int accept_loss(int socket);
-
+void set_mic_tcp_pdu(mic_tcp_pdu* pdu, unsigned short source_port, unsigned short dest_port, unsigned int seq_num, unsigned int ack_num, unsigned char syn, unsigned char ack, unsigned char fin, char* data, int size);
+void process_syn_pdu(mic_tcp_pdu pdu,mic_tcp_sock_addr addr, int mic_sock);
 //================================== FONCTIONS DE MICTCP =============================
 
 
@@ -119,6 +121,7 @@ int mic_tcp_accept(int socket, mic_tcp_sock_addr *addr)
 	if (valid_socket(socket))
 	{
 		tab_sockets[socket].socket.state = ACCEPTING;
+		display_enhanced_socket(tab_sockets[socket], "état du socket en attendant l'établissement de connection");
 		while (tab_sockets[socket].socket.state != ESTABLISHED){ //attente jusqu'a l'etablissement de la connexion
 			if(pthread_mutex_lock(&mutex)!= 0){error("erreur lock mutex",__LINE__);} //lock mutex
 			pthread_cond_wait(&end_accept_cond,&mutex);
@@ -142,75 +145,79 @@ int mic_tcp_connect(int socket, mic_tcp_sock_addr addr)
 {
 	tab_sockets[socket].dist_addr = addr;
 	tab_sockets[socket].NoSeqLoc = 0;
+	tab_sockets[socket].socket.state = SYN_SENT;
 	// create pdu syn
 	mic_tcp_pdu pdu;
-	pdu.header.source_port = tab_sockets[socket].socket.addr.port;
-	pdu.header.dest_port = tab_sockets[socket].dist_addr.port;
-	pdu.header.seq_num = tab_sockets[socket].NoSeqLoc;
-	pdu.header.ack_num = -1;
-	pdu.header.syn = 1;
-	pdu.header.ack = 0;
-	pdu.header.fin = 0;
 
+	set_mic_tcp_pdu(
+		&pdu,
+		tab_sockets[socket].socket.addr.port,
+		tab_sockets[socket].dist_addr.port,
+		tab_sockets[socket].NoSeqLoc,
+		-1,
+		1,0,0,
+		NULL,0
+	);
 
-	pdu.payload.data = NULL;
-	pdu.payload.size = 0;
-    display_enhanced_socket(tab_sockets[socket], "état du socket");
-    display_mic_tcp_pdu(pdu, "envoi du pdu :");
-    printf("À l'adresse :\n Remote Address IP: %.*s\n", addr.ip_addr_size, addr.ip_addr);
-	printf("Remote Address Port: %hu\n", addr.port);
+    display_mic_tcp_pdu(pdu, "creation du pdu SYN:");
 
-    IP_send(pdu, tab_sockets[socket].dist_addr);
-	tab_sockets[socket].socket.state = SYN_SENT;
+	display_mic_tcp_sock_addr(addr, "envoi du pdu SYN vers l'adresse :");
 
 	mic_tcp_pdu pdu_r;
 	mic_tcp_sock_addr addr_r;
 	
-	while (1)
-	{
+	IP_send(pdu, addr);
+    // display_enhanced_socket(tab_sockets[socket], "état du socket en attente du syn ack :");
+	while (1){
 		sleep(timeout);
 		if (IP_recv(&pdu_r,&addr_r, timeout) == -1){
+			if (tab_sockets[socket].socket.state == ESTABLISHED) return 0;
+
 			IP_send(pdu, tab_sockets[socket].dist_addr);
-			printf("j'envoie un doublon du syn\n");
+			printf("SYN ACK pas encore recu, envoi d'un doublon du syn\n");
 			continue;
 		}
 		display_mic_tcp_pdu(pdu_r,"pdu reçu :");
 
-		if (pdu_r.header.ack == 1 && pdu_r.header.syn == 1){
+		if (pdu_r.header.ack == 1 && pdu_r.header.syn == 1 /*on s'occuppe plus tard de la verif du num de seq*/){
 			printf("Bon PDU SYN ACK recu \n");
 
-			tab_sockets[socket].NoSeqDist = pdu.header.seq_num; // récupérer n° de seq du client
+			tab_sockets[socket].NoSeqDist = pdu_r.header.seq_num; // récupérer n° de seq du server 
 
+			set_mic_tcp_pdu(
+			&pdu,
+			tab_sockets[socket].socket.addr.port,
+			tab_sockets[socket].dist_addr.port,
+			-1,
+			pdu_r.header.seq_num,
+			0,1,0,
+			NULL,0
+			);
+	
+		    display_mic_tcp_pdu(pdu, "creation du pdu ACK:");
 
-			pdu.header.source_port = tab_sockets[socket].socket.addr.port;
-			pdu.header.dest_port = tab_sockets[socket].dist_addr.port;
-			pdu.header.seq_num = -1;
-			pdu.header.ack_num = tab_sockets[socket].NoSeqDist;
-			pdu.header.syn = 0;
-			pdu.header.ack = 1;
-			pdu.header.fin = 0;
-			pdu.payload.size = 0;
-			pdu.payload.data = NULL;
+			display_mic_tcp_sock_addr(addr, "envoi du pdu ACK vers l'adresse :");
 
-			IP_send(pdu, tab_sockets[socket].dist_addr);
+			IP_send(pdu, addr);
 
-
-			printf("PDU ACK de connexion envoyé\n");
-			display_mic_tcp_sock_addr(tab_sockets[socket].dist_addr, "à l'adresse:");
-			display_mic_tcp_pdu(pdu, "Pdu ACK : \n");
-
-			mic_tcp_pdu* args = malloc(sizeof(mic_tcp_pdu));
-			args->header=pdu.header;
-			args->payload=pdu.payload;
+			// mic_tcp_pdu* args = malloc(sizeof(mic_tcp_pdu));
+			// args->header=pdu.header;
+			// args->payload=pdu.payload;
 
 			tab_sockets[socket].socket.state = ESTABLISHED;
 			
-			break;
+/*on attend naivement l'arrivee d'un nouveau syn ack au cas ou le ack a ete perdu, puis on relance la boucle, pour verifier*/
+			sleep(ATTENTE_ACK*timeout);
+			continue;
+			
+		}
+		else {
+			printf(debug?"Le pdu recu n'est pas un SYN ACK\n":"");
+			continue;
 		}
 		
        
 	}
-
 	display_enhanced_socket(tab_sockets[socket], "État du socket aprés l'établissement de la connection :");
 	return 0;
 }
@@ -329,6 +336,42 @@ int mic_tcp_recv(int socket, char *mesg, int max_mesg_size)
  * le buffer de réception du socket. Cette fonction utilise la fonction
  * app_buffer_put(). Elle est appelée par initialize_components()
  */
+void process_syn_pdu(mic_tcp_pdu pdu,mic_tcp_sock_addr addr, int mic_sock){
+	printf("[MIC-TCP] Appel de la fonction: ");
+	printf(__FUNCTION__);
+	printf("\n");
+
+	tab_sockets[mic_sock].socket.state = SYN_RECEIVED;
+	tab_sockets[mic_sock].dist_addr=addr;
+	tab_sockets[mic_sock].NoSeqDist=pdu.header.seq_num;
+	tab_sockets[mic_sock].NoSeqLoc=0; //Premier numéro de seq toujours à 0
+	mic_tcp_pdu pdu_r;
+
+	set_mic_tcp_pdu(&pdu_r, 
+					tab_sockets[mic_sock].socket.addr.port,
+					tab_sockets[mic_sock].dist_addr.port,
+					tab_sockets[mic_sock].NoSeqLoc, 
+					tab_sockets[mic_sock].NoSeqDist,
+					 1,1,0,NULL,0
+	);
+			
+	display_mic_tcp_pdu(pdu_r, "Construction du Pdu SYN ACK : \n");
+	display_mic_tcp_sock_addr(tab_sockets[mic_sock].dist_addr, "Envoi du PDU SYN ACK à l'adresse:");
+
+	IP_send(pdu_r, addr);
+
+
+
+	arg_thread* args = malloc(sizeof(arg_thread));
+	args->socket=mic_sock;
+	args->pdu_r=pdu_r;
+
+	printf("avant creation thread\n");
+	pthread_create(&attente_ack_tid, NULL,attente_ack,(void *)args);
+	printf("aprés creation thread\n");
+
+
+}
 
 void process_received_PDU(mic_tcp_pdu pdu, mic_tcp_sock_addr addr) //addr = adresse distante
 {
@@ -341,72 +384,31 @@ void process_received_PDU(mic_tcp_pdu pdu, mic_tcp_sock_addr addr) //addr = adre
 		; // trouver le socket destinataire
 	if (mic_sock == socket_desc)
 	{ // si aucun socket trouvé, alors retourne une erreur
-		printf("socket non trouvé\n");
+		printf(debug?"socket non trouvé\n":"");
 	}
 
 	
 	if (pdu.header.syn == 1 && tab_sockets[mic_sock].socket.state == ACCEPTING) // si PDU SYN
 	{	
-		printf("PDU SYN recu\n");
-		tab_sockets[mic_sock].socket.state = SYN_RECEIVED;
-		mic_tcp_pdu pdu_r;
-
-		tab_sockets[mic_sock].NoSeqDist = pdu.header.seq_num;
-		tab_sockets[mic_sock].dist_addr = addr;
-		pdu_r.header.source_port = tab_sockets[mic_sock].socket.addr.port;
-		pdu_r.header.dest_port = tab_sockets[mic_sock].dist_addr.port;
-		pdu_r.header.seq_num = tab_sockets[mic_sock].NoSeqLoc;
-		pdu_r.header.ack_num = tab_sockets[mic_sock].NoSeqDist;
-		pdu_r.header.syn = 1;
-		pdu_r.header.ack = 1;
-		pdu_r.header.fin = 0;
-
-		pdu_r.payload.size = 0;
-		pdu_r.payload.data = NULL;
-        
-        display_mic_tcp_sock_addr(tab_sockets[mic_sock].dist_addr, "à l'adresse:");
-		IP_send(pdu_r, tab_sockets[mic_sock].dist_addr);
-
-		tab_sockets[mic_sock].socket.state = SYN_RECEIVED;
-
-		display_mic_tcp_pdu(pdu_r, "Pdu SYN ACK : \n");
-
-		arg_thread* args = malloc(sizeof(arg_thread));
-		args->socket=mic_sock;
-		args->pdu_r=pdu_r;
-
-		printf("avant creation thread\n");
-		pthread_create(&attente_ack_tid, NULL,attente_ack,(void *)args);
-		printf("aprés creation thread\n");
-
-
+		process_syn_pdu(pdu,addr, mic_sock);
 	}
 	else if (pdu.header.syn == 1 && tab_sockets[mic_sock].socket.state == SYN_RECEIVED) // si Doublon PDU SYN
 	{	
 		printf("Doublon PDU SYN recu\n");
-		// mic_tcp_pdu pdu_r;
-
-		// tab_sockets[mic_sock].NoSeqDist = pdu.header.seq_num;
-		// tab_sockets[mic_sock].dist_addr = addr;
-		// pdu_r.header.source_port = tab_sockets[mic_sock].socket.addr.port;
-		// pdu_r.header.dest_port = tab_sockets[mic_sock].dist_addr.port;
-		// pdu_r.header.seq_num = tab_sockets[mic_sock].NoSeqLoc;
-		// pdu_r.header.ack_num = tab_sockets[mic_sock].NoSeqDist;
-		// pdu_r.header.syn = 1;
-		// pdu_r.header.ack = 1;
-		// pdu_r.header.fin = 0;
-
-		// pdu_r.payload.size = 0;
-		// pdu_r.payload.data = NULL;
-        
-        // display_mic_tcp_sock_addr(tab_sockets[mic_sock].dist_addr, "à l'adresse:");
-		// IP_send(pdu_r, tab_sockets[mic_sock].dist_addr);
-
-
-		// display_mic_tcp_pdu(pdu_r, "Pdu SYN ACK : \n");
-
-
 	}
+
+	else if (pdu.header.ack == 1 && tab_sockets[mic_sock].socket.state == SYN_RECEIVED)
+	{ // Si ACK de connection reçu
+
+		printf("PDU ACK recu \n");
+		tab_sockets[mic_sock].socket.state = ESTABLISHED;
+		if(pthread_mutex_lock(&mutex)!= 0){error("erreur lock mutex",__LINE__);} //lock mutex
+        pthread_cond_broadcast(&end_accept_cond); // Rendre la main au client une fois le accept terminé
+        if(pthread_mutex_unlock(&mutex)!= 0){error("erreur unlock mutex",__LINE__);} //unlock mutex
+
+		printf("Connexion établie\n");
+	}
+	
 	else if(pdu.header.ack == 0 && pdu.header.seq_num == tab_sockets[mic_sock].NoSeqDist && tab_sockets[mic_sock].socket.state == ESTABLISHED)
 	{ // Si PDU de DATA 
 		printf("PDU data recu \n");
@@ -446,18 +448,7 @@ void process_received_PDU(mic_tcp_pdu pdu, mic_tcp_sock_addr addr) //addr = adre
 		printf("pdu ack envoyé\n");
 
 	}
-	else if (pdu.header.ack == 1 && tab_sockets[mic_sock].socket.state == SYN_RECEIVED)
-	{ // Si ACK de connection reçu
-
-		printf("PDU ACK recu \n");
-		tab_sockets[mic_sock].socket.state = ESTABLISHED;
-		if(pthread_mutex_lock(&mutex)!= 0){error("erreur lock mutex",__LINE__);} //lock mutex
-        pthread_cond_broadcast(&end_accept_cond); // Rendre la main au client une fois le accept terminé
-        if(pthread_mutex_unlock(&mutex)!= 0){error("erreur unlock mutex",__LINE__);} //unlock mutex
-
-		printf("Connexion établie\n");
-	}
-	else if (pdu.header.ack == 1 && tab_sockets[mic_sock].socket.state == WAITING && (tab_sockets[mic_sock].NoSeqLoc != pdu.header.ack_num))
+else if (pdu.header.ack == 1 && tab_sockets[mic_sock].socket.state == WAITING && (tab_sockets[mic_sock].NoSeqLoc != pdu.header.ack_num))
 	{
 		// si ACK de bon numéro de séquence
 		printf("PDU ACK de Data recu \n");
@@ -525,7 +516,20 @@ int same_addr(mic_tcp_sock_addr *addr1, mic_tcp_sock_addr *addr2)
 	return 0;
 }
 
+void set_mic_tcp_pdu(mic_tcp_pdu* pdu, unsigned short source_port, unsigned short dest_port, unsigned int seq_num, unsigned int ack_num, unsigned char syn, unsigned char ack, unsigned char fin, char* data, int size) {
+  pdu->header.source_port = source_port;
+  pdu->header.dest_port = dest_port;
+  pdu->header.seq_num = seq_num;
+  pdu->header.ack_num = ack_num;
+  pdu->header.syn = syn;
+  pdu->header.ack = ack;
+  pdu->header.fin = fin;
+  pdu->payload.data = data;
+  pdu->payload.size = size;
+}
+	
 void display_mic_tcp_pdu(mic_tcp_pdu pdu, char* prefix) {
+	if (!debug) return ;
 	printf("------------------------------------------\n%s\n", prefix);
 	printf("ACK Flag: %d\n", pdu.header.ack);
 	printf("FIN Flag: %d\n", pdu.header.fin);
@@ -546,6 +550,7 @@ void display_mic_tcp_pdu(mic_tcp_pdu pdu, char* prefix) {
 
 
 void display_enhanced_socket(enhanced_socket sock,char* prefix) {
+	if (!debug) return ;
 	printf("----------------------------------\n");
 	printf("%s\n", prefix);
 	printf("Socket File Descriptor: %d\n", sock.socket.fd);
@@ -565,25 +570,29 @@ void display_enhanced_socket(enhanced_socket sock,char* prefix) {
 }
 
 void display_mic_tcp_sock_addr(mic_tcp_sock_addr addr, char* prefix) {
+	printf("----------------------------------\n");
+	if (!debug) return ;
 	printf("%s\n", prefix);
 	printf("IP Address: %.*s\n", addr.ip_addr_size, addr.ip_addr);
   	printf("Port: %hu\n", addr.port);
+	printf("----------------------------------\n");
 }
 
 
 
 void * attente_ack(void * arg) {
-	printf("début thread d'envoi de SYN ACK'\n");
+	printf(debug?"début du TESA : thread d'envoi de SYN ACK'\n":"");
 	arg_thread* args = (arg_thread*)arg;
 	while (1)
 		{
 			if (tab_sockets[args->socket].socket.state == SYN_RECEIVED)
 			{
 				IP_send(args->pdu_r, tab_sockets[args->socket].dist_addr);
-				printf("je renvoie le Syn ack\n");
+				printf(debug?"TESA: je renvoie le Syn ack\n":"");
 			}
 			else if (tab_sockets[args->socket].socket.state == ESTABLISHED)
 			{
+				printf("!Destruction du TESA!");
 				pthread_exit(NULL);
 			}
 			sleep(timeout);