diff --git a/client b/client
index 8918d9f..82beefd 100755
Binary files a/client and b/client differ
diff --git a/client.h b/client.h
index ca6902c..2262c75 100644
--- a/client.h
+++ b/client.h
@@ -11,8 +11,8 @@
 	#include <sys/socket.h>
 	#include <netinet/in.h>
 	#include <errno.h>
-	
-	#define BUFSIZE 20
 
 
+	#include "lib.h"
+
 #endif
diff --git a/client.o b/client.o
index c7aec51..8cb6312 100644
Binary files a/client.o and b/client.o differ
diff --git a/lib.c b/lib.c
index e69de29..f45d077 100644
--- a/lib.c
+++ b/lib.c
@@ -0,0 +1,6 @@
+#include "lib.h"
+
+
+
+
+int createUPDSocket(int port){ return 1; }
diff --git a/lib.h b/lib.h
index e69de29..f3fbe9c 100644
--- a/lib.h
+++ b/lib.h
@@ -0,0 +1,29 @@
+#ifndef _LIB_H_
+
+	#define _LIB_H_
+
+
+	#define BUFSIZE 20
+
+
+	// debug flags
+	# define DEBUG	1
+
+
+	
+
+	/************************************************
+	****                Signatures               ****
+	************************************************/
+
+	/* CREATES A UDP SOCKET
+	*
+	* @port<int> 						Port to use (if 0: random)
+	*
+	* @return socket<socket> 				Socket descriptor or -1 if error
+	*
+	*/
+	
+	int createUPDSocket(int port);
+
+#endif
diff --git a/lib.o b/lib.o
index 1a7849e..3d9b2d3 100644
Binary files a/lib.o and b/lib.o differ
diff --git a/makefile b/makefile
index ec8e644..0a49cce 100644
--- a/makefile
+++ b/makefile
@@ -1,10 +1,10 @@
-CC=-Wall -Werror
+CC=-Wall -Werror -g
 
 
 client.o: client.h client.c
 	gcc $(CC) -c -o client.o client.c
 
-server.o: server.h server.c
+server.o: lib.h server.h server.c
 	gcc $(CC) -c -o server.o server.c
 
 lib.o: lib.h lib.c
diff --git a/server b/server
new file mode 100755
index 0000000..c7ca090
Binary files /dev/null and b/server differ
diff --git a/server.c b/server.c
index 834a946..0dd56dc 100644
--- a/server.c
+++ b/server.c
@@ -12,9 +12,10 @@ int main(int argc, char* argv[]){
 	// Client
 	static struct sockaddr_in addr_client;
 	// Client identifier
-	struct hostent *host_client;
+	struct hostent *host_client = NULL;
 	// Socket size
 	socklen_t sock_len;
+	char client_ip[20];
 	// Socket
 	int sock;
 
@@ -51,12 +52,12 @@ int main(int argc, char* argv[]){
 	addr_server.sin_addr.s_addr = htonl(INADDR_ANY); // 
 
 	/* (3) Bind socket to local port */
-	int bounded = bind(sock,                               // ) socket
+	int bounded = bind(    sock,                           // ) socket
 		       /* ( */ (struct sockaddr*)&addr_server, // ) filled with address
 		       /* ( */ sizeof(addr_server)                ); // length of struct
 
 	/* (3-) Manage error */
-	if( bounded != -1 ){	
+	if( bounded == -1 ){	
 		perror("erreur bind");
 		exit(1);
 	}
@@ -80,11 +81,14 @@ int main(int argc, char* argv[]){
 		exit(1);
 	}
 
+	// Get client ip
+	inet_ntop(AF_INET, &(addr_client.sin_addr), client_ip, 20);
+
 	/* (2) Fetch client information */
 	// récupère nom de la machine émettrice des données
-	host_client = gethostbyaddr( &(addr_client.sin_addr), // ) client addr (filled)
-			         /* ( */ sizeof(long),        // ) sizeof addr
-			         /* ( */ AF_INET                 ); // ipv4
+	host_client = gethostbyaddr(    &addr_client.sin_addr, // ) client addr (filled)
+			        /* ( */ sizeof(struct in_addr),       // ) sizeof addr
+			        /* ( */ AF_INET                ); // ipv4
 
 	/* (2-) Manage error */
 	if( host_client == NULL ){
@@ -96,7 +100,7 @@ int main(int argc, char* argv[]){
 	received = (char *) malloc(buf_len * sizeof(char));
 	memcpy(received, buffer, buf_len);
 
-	printf( "recu message %s de %s:%d\n", received, host_client->h_name, ntohs(addr_client.sin_port) );
+	printf( "recu message %s de %s:%d\n", received, client_ip, ntohs(addr_client.sin_port) );
 
 	/* [4] Send response
 	=========================================================*/
diff --git a/server.h b/server.h
index e766838..085b371 100644
--- a/server.h
+++ b/server.h
@@ -6,6 +6,7 @@
 
 	#include <stdio.h>
 	#include <stdlib.h>
+	#include <arpa/inet.h>
 	#include <string.h>
 	#include <unistd.h>
 	#include <sys/types.h>
@@ -13,7 +14,9 @@
 	#include <sys/socket.h>
 	#include <netinet/in.h>
 	#include <errno.h>
-	
+
+
+	#include "lib.h"
 
 
 #endif
diff --git a/server.o b/server.o
index 33457c9..bf062e4 100644
Binary files a/server.o and b/server.o differ
diff --git a/test1 b/test1
new file mode 100644
index 0000000..13c6037
--- /dev/null
+++ b/test1
@@ -0,0 +1 @@
+¸
\ No newline at end of file