diff --git a/parser.h b/parser.h
new file mode 100644
index 0000000..b7694e0
--- /dev/null
+++ b/parser.h
@@ -0,0 +1,41 @@
+#include <stdio.h>
+#include <string.h>
+
+enum cmd_type {
+	NEIGHBOUR_REQ, NETWORK_STATE_REQ, NODE_STATE_REQ, SEND, ERROR
+};
+
+struct cmd_token {
+	enum cmd_type type;
+	char arg[193];
+};
+
+// retourne le type de commande à exécuter
+struct cmd_token parse_cmd() {
+	char buf[198], cmd[5], arg[193];
+	struct cmd_token token;
+	token.type = ERROR;
+	memset(token.arg, 0, 193);
+
+	if(fgets(buf, 198, stdin) == NULL)
+		return token;
+
+	// cmd sera le premier mot rencontré et arg la suite de mots après celui ci, si les deux variables ne sont pas remplies alors il y a une erreur
+	if(sscanf(buf, "%s %[^\t\n]", cmd, arg) != 2)
+		return token;
+
+	if(strcmp("req", cmd) == 0) {
+		if(strcmp("neighbour", arg) == 0) 
+			token.type = NEIGHBOUR_REQ;
+		else if(strcmp("network state", arg) == 0)
+			token.type = NETWORK_STATE_REQ;
+		else if(strcmp("node state", arg) == 0)
+			token.type = NODE_STATE_REQ;
+	} else if(strcmp("send", cmd) == 0) {
+		token.type = SEND;
+		//arg[192] = 0;
+		strcpy(token.arg, arg);
+	}
+
+	return token;
+}
\ No newline at end of file
diff --git a/tlv.h b/tlv.h
index 105b198..9fbbf07 100644
--- a/tlv.h
+++ b/tlv.h
@@ -1,5 +1,6 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
+#include "parser.h"
 
 // 8 octets min (struct pointer 4 octets), 1024 octets max 
 typedef struct packet {
@@ -93,4 +94,27 @@ typedef struct warning {
 	unsigned char type;
 	unsigned char length;
 	char *message;
-} warning;
\ No newline at end of file
+} warning;
+
+// creer un tlv
+void build_tlv(tlv *t) {
+	struct cmd_token token = parse_cmd();
+
+	switch(token.type) {
+		case NEIGHBOUR_REQ:
+			// a remplir
+			break;
+		case NETWORK_STATE_REQ:
+			// a remplir
+			break;
+		case NODE_STATE_REQ:
+			// a remplir
+			break;
+		case SEND:
+			// a remplir
+			break;
+		case ERROR:
+			printf("Wrong format, use 'req {neighbour | network state | node state}' or 'send {message}'");
+			break;
+	}
+}
\ No newline at end of file