diff --git a/header/bal.h b/header/bal.h
index 23bacce..faadbe4 100644
--- a/header/bal.h
+++ b/header/bal.h
@@ -25,5 +25,6 @@ struct elementMessage * initElementMessage(void);
 struct listeMessage initListeMessage(void);
 void ajoutListe(struct listeMessage * listeActuel,messageBAL * leMessage);
 void afficheListeMessage(struct listeMessage listeActuel);
+int bal(void);
 
 #endif
\ No newline at end of file
diff --git a/header/tsock.h b/header/tsock.h
index e67c1a2..8e51d59 100644
--- a/header/tsock.h
+++ b/header/tsock.h
@@ -20,4 +20,10 @@ void getNonOtpArgs(char ** argv, int argc, int * portNumber, char * ipAddress[])
 void formatText(char * actualMessage, int num, int tailleMessage, char messageChar);
 int exitMax(int var,int tailleMax);
 
+char * formatTextParam(int numEmetteur, int numRecepteur, int tailleMessage, int nbMessage);
+char * formatTextMessage(char * message, int tailleMessage);
+int convertion(int nbr,char *numbuffer);
+int gestionOffset(char *actualMessage,int encadrementHaut,int encadrementBas,int nbr);
+int testProtocol(void);
+
 #endif
\ No newline at end of file
diff --git a/src/bal.c b/src/bal.c
index 7b8b94e..968e00d 100644
--- a/src/bal.c
+++ b/src/bal.c
@@ -1,6 +1,6 @@
 #include "../header/bal.h"
 
-int main(void){
+int bal(void){
     struct listeMessage l = initListeMessage();
     messageBAL * messageBAL = creeMessage("Renvoi moi mon pdf asap. -Simon",1);
     ajoutListe(&l,messageBAL);
diff --git a/src/listebal.c b/src/listebal.c
deleted file mode 100644
index 03fe3da..0000000
--- a/src/listebal.c
+++ /dev/null
@@ -1,46 +0,0 @@
-#include <stdio.h>                                  
-#include <stdlib.h>                                 
-#include <string.h>                                 
-#include <stdbool.h> 
-
-struct message{
-    char *data;
-    int tailleData;
-    int idEmeteur;
-    struct message *messageSuiv;
-    struct message *messageFin;
-};
-
-typedef struct {
-
-    int idRecept;
-    struct BAL *BALSuiv;
-    struct BAL *BALFin;
-    struct message *message;
-}BAL;
-
-
-struct message creeMessage(char *dataPara,int idEmeteurPara);
-
-int main(void){
-    char * txt="simon";
-    struct message *listeMessage =malloc(sizeof(struct message));
-    *listeMessage=creeMessage(txt,12);
-    printf("idEmeteur = %d\n",listeMessage->idEmeteur);
-    printf("data=%s\n",listeMessage->data);
-    printf("taille data=%d\n",listeMessage->tailleData);
-    return 0;
-}
-
-
-
-struct message creeMessage(char *dataPara,int idEmeteurPara){
-    int tailleDataPara =strlen(dataPara);
-    struct message * elementMessage  =(struct message *)malloc(sizeof(struct message));
-
-    elementMessage->idEmeteur=idEmeteurPara;
-    elementMessage->tailleData=tailleDataPara;
-    elementMessage->data=(char*)malloc(sizeof(char)*tailleDataPara);
-    strcpy(elementMessage->data,(dataPara));
-    return *elementMessage;
-}
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index 34d8175..1523e2c 100644
--- a/src/main.c
+++ b/src/main.c
@@ -4,6 +4,7 @@
 
 int main (int argc, char **argv)
 {
+	testProtocol();
 	char usageChar[30]="usage: cmd [-p|-s][-n ##]\n";
 	char *ipAddress;
 	extern char *optarg;
diff --git a/src/tsock.c b/src/tsock.c
index 576e8e5..2e8abf0 100644
--- a/src/tsock.c
+++ b/src/tsock.c
@@ -79,4 +79,62 @@ int exitMax(int var,int tailleMax){
         exit(EXIT_FAILURE);
     }
     return 0;
+}
+
+int testProtocol(void)
+{
+    char * msg;
+    msg=formatTextParam(7, 8, 64, 1);
+    printf("%s\n",msg);
+    msg=formatTextMessage("aaaaaa",6);
+    printf("%s\n",msg);
+    return 0;
+}
+
+
+char * formatTextParam(int numEmetteur, int numRecepteur, int tailleMessage, int nbMessage)
+{
+    char * actualMessage = malloc(sizeof(char)*16);
+    actualMessage[0]='1';
+    gestionOffset(actualMessage, 4,1,numEmetteur);
+    gestionOffset(actualMessage, 8,5,numRecepteur);
+    gestionOffset(actualMessage, 12,9,tailleMessage);
+    gestionOffset(actualMessage, 16,13,nbMessage);
+    return actualMessage;
+}
+
+char * formatTextMessage(char * message, int tailleMessage)
+{
+    char * actualMessage = malloc(sizeof(char)*(tailleMessage+1));
+    actualMessage[0]='0';
+    for(int i=1,j=0;i<tailleMessage+1;i++,j++)
+    {
+        actualMessage[i]=message[j];
+    }
+    return actualMessage;
+}
+
+int convertion(int nbr,char *numbuffer)
+{
+    sprintf(numbuffer, "%d", (nbr)%10000);
+    return 0;
+}
+
+int gestionOffset(char *actualMessage,int encadrementHaut,int encadrementBas,int nbr)
+{
+    int taillechaine=0;
+    char numbuffer[30];
+    convertion(nbr,numbuffer);
+    taillechaine=strlen(numbuffer);
+    for(int i=encadrementBas;i<encadrementHaut-taillechaine+1;i++)
+    {
+        actualMessage[i]=0x20;
+        
+    }
+    for(int i=encadrementHaut-taillechaine+1,j=0;i<encadrementHaut+1;i++,j++)
+    {
+        actualMessage[i]=numbuffer[j];
+        
+    }
+    return  encadrementHaut;
 }
\ No newline at end of file