diff --git a/plane/Makefile b/plane/Makefile
index 2e4e1c4..ddb363a 100644
--- a/plane/Makefile
+++ b/plane/Makefile
@@ -9,13 +9,13 @@ default: all
 lib/network/tcp/client.o: lib/header.h lib/network/tcp/client.h lib/network/tcp/client.c
 	gcc $(CFLAGS) -c -o lib/network/tcp/client.o lib/network/tcp/client.c
 
-lib/network/udp/client.o: lib/header.h lib/network/udp/client.h lib/network/udp/client.c
-	gcc $(CFLAGS) -c -o lib/network/udp/client.o lib/network/udp/client.c
+lib/network/udp/server.o: lib/header.h lib/network/udp/server.h lib/network/udp/server.c
+	gcc $(CFLAGS) -c -o lib/network/udp/server.o lib/network/udp/server.c
 
 # Compiles the Plane
 # -lm flag for math lib
-boot: lib/network/tcp/client.o lib/network/udp/client.o plane.h plane.c
-	gcc $(CFLAGS) -o boot lib/network/tcp/client.o lib/network/udp/client.o plane.c -lm
+boot: lib/network/tcp/client.o lib/network/udp/server.o plane.h plane.c
+	gcc $(CFLAGS) -o boot lib/network/tcp/client.o lib/network/udp/server.o plane.c -lm
 
 
 # Run full compilation
diff --git a/plane/lib/network/udp/server.c b/plane/lib/network/udp/server.c
new file mode 100644
index 0000000..cc980a7
--- /dev/null
+++ b/plane/lib/network/udp/server.c
@@ -0,0 +1,77 @@
+/**************************int DROP_MULTICAST_SERVER(const char* pAddr, const int pPort, int* pListenSock, struct sockaddr_in* pInfo){
+*  UDP Server Dependency  *
+***************************
+* Designed & Developed by *
+*     Adrien Marquès      *
+*     <xdrm-brackets>     *
+***************************
+*   doowap31@gmail.com    *
+**************************/
+#include "server.h"
+
+
+
+
+int DROP_MULTICAST_SERVER(const char* pAddr, const int pPort, int* pListenSock, struct sockaddr_in* pInfo){
+
+    /* [0] Initialisation des variables
+    =========================================================*/
+    int  STATUS; // status
+    struct ip_mreq mcastReq;
+    *pListenSock = -1;
+    struct timeval timeout;
+
+
+    /* [1] Création de la socket
+    =======================================================*/
+    /* 1. Création socket */
+    *pListenSock = socket(AF_INET, SOCK_DGRAM, 0);
+
+    /* 2. Gestion erreur */
+    if( *pListenSock < 0 ) return -1;
+
+    /* 3. Timeout */
+    timeout.tv_sec  = SOCK_TIMEOUT;
+    timeout.tv_usec = 0;
+
+    if( setsockopt(*pListenSock, SOL_SOCKET, SO_RCVTIMEO|SO_SNDTIMEO, (char*) &timeout, sizeof(struct timeval) ) < 0 ){
+        close(*pListenSock);
+        return -1;
+    }
+
+
+    /* [2] On définit les infos de la socket
+    =========================================================*/
+    /* (1) Reset des valeurs */
+    bzero(pInfo, sizeof(struct sockaddr_in));
+
+    /* (2) On définit les infos */
+    pInfo->sin_family      = AF_INET;
+    pInfo->sin_port        = htons(pPort);
+    pInfo->sin_addr.s_addr = htonl(INADDR_ANY);
+
+
+    /* [3] On publie la SOCKET
+    =======================================================*/
+    /* 1. Publication socket */
+	STATUS = bind(*pListenSock, (struct sockaddr*) pInfo, sizeof(struct sockaddr_in));
+
+    /* 2. Gestion erreur */
+    if( STATUS < 0 ) return -1;
+
+    /* 3. Demande groupe multicast */
+    mcastReq.imr_multiaddr.s_addr = inet_addr(pAddr);
+    mcastReq.imr_interface.s_addr = htonl(INADDR_ANY);
+
+    if( setsockopt(*pListenSock, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mcastReq, sizeof(mcastReq)) < 0 ){
+        close(*pListenSock);
+        return -1;
+    }
+
+
+
+    /* [n] Code succès
+    =========================================================*/
+    return 0;
+}
+
diff --git a/plane/lib/network/udp/server.h b/plane/lib/network/udp/server.h
new file mode 100644
index 0000000..291461e
--- /dev/null
+++ b/plane/lib/network/udp/server.h
@@ -0,0 +1,45 @@
+/**************************
+*  UDP Server Dependency  *
+***************************
+* Designed & Developed by *
+*     Adrien Marquès      *
+*     <xdrm-brackets>     *
+***************************
+*   doowap31@gmail.com    *
+**************************/
+
+
+#ifndef _LIB_NETWORK_UDP_SERVER_H_
+    #define _LIB_NETWORK_UDP_SERVER_H_
+
+
+
+        #include "../../header.h"
+
+
+        /* Créé et met un serveur UDP d'écoute MULTICAST
+        *
+        * ==IN==
+        * @pAddr<const char*>				Adresse du groupe multicast UDP
+        * @pPort<const int>				    Port d'écoute UDP
+        * @pMcast<const char>				Si multicast ou non
+        *
+        * ==OUT==
+        * @pListenSocket<int*>				Pointeur sur le <int>   à remplir      => contiendra un pointeur sur la socket d'écoute
+        * @pInfo<sockaddr_in*>				Pointeur sur le <sockaddr_n> à remplir => contiendra un pointeur sur les infos server
+        *
+        * ==RETURN==
+        * @status<int>                      -1 si erreur, sinon 0
+        *
+        * @history
+        *  [1] Création de la socket d'écoute
+        *  [2] On définit les infos de la socket
+        *  [3] On publie la SOCKET (bind)
+        *  [n] On renvoie la socket par référence
+        *
+        */
+        int DROP_MULTICAST_SERVER(const char* pAddr, const int pPort, int* pListenSock, struct sockaddr_in* pInfo);
+
+
+
+#endif
\ No newline at end of file
diff --git a/plane/plane.c b/plane/plane.c
index b751c4f..9f6ddbf 100644
--- a/plane/plane.c
+++ b/plane/plane.c
@@ -38,7 +38,7 @@ int open_communication(){
 
   /* (1) Création socket multicast
   ---------------------------------------------------------*/
-  if( UDP_SOCKET(&mcast_socket, MCST_HOST, MCST_PORT, &udp) < 0 )
+  if( DROP_MULTICAST_SERVER(MCST_HOST, MCST_PORT, &mcast_socket, &udp) < 0 )
     return 0;
 
 
@@ -48,17 +48,18 @@ int open_communication(){
   // memcpy(buffer, numero_vol, sizeof(char)*6);
   request.flags      = BINDHEAD_TCP;
   strcpy(request.addr, "000.000.000.000");
-  request.port       = 0;
+  request.port       = htons(0);
   memcpy(buffer+sizeof(char)*0,                   &request.flags, sizeof(char));
   memcpy(buffer+sizeof(char)*1,                   &request.addr,  sizeof(char)*INET_ADDRSTRLEN);
   memcpy(buffer+sizeof(char)*(1+INET_ADDRSTRLEN), &request.port,  sizeof(unsigned short));
 
   /* 2. Envoi séquence */
-  if( sendto(mcast_socket, buffer, BINDHDR_LEN/sizeof(char) +1, 0, (struct sockaddr*) &udp, sizeof(struct sockaddr_in)) < 0 ){
-    close(mcast_socket);
-    return 0;
-  }
+  // if( sendto(mcast_socket, buffer, BINDHDR_LEN/sizeof(char) +1, 0, (struct sockaddr*) &udp, sizeof(struct sockaddr_in)) < 0 ){
+  //   close(mcast_socket);
+  //   return 0;
+  // }
 
+  // printf("* sent bind_header{flags = %d; addr = %s; port = %d;}\n", request.flags, request.addr, htons(request.port));
 
   /* (3) Attente réponse SGCA -> adresse+port TCP
   ---------------------------------------------------------*/
@@ -73,6 +74,7 @@ int open_communication(){
 
   /* 3. Vérification taille */
   if( status < BINDHDR_LEN ){
+    printf("%d / %d\n", status, (int) BINDHDR_LEN);
     close(mcast_socket);
     return 0;
   }
@@ -84,7 +86,7 @@ int open_communication(){
   memcpy(&request.addr,  buffer+sizeof(char),                     sizeof(char)*INET_ADDRSTRLEN );
   memcpy(&request.port,  buffer+sizeof(char)*(1+INET_ADDRSTRLEN), sizeof(unsigned short)       );
 
-  printf("bind_header{flags = %d; addr = %s; port = %d;}\n\n", request.flags, request.addr, request.port);
+  printf("* received bind_header{flags = %d; addr = %s; port = %d;}\n\n", request.flags, request.addr, request.port);
 
 
 
diff --git a/plane/plane.h b/plane/plane.h
index 7ea90b0..f12be07 100644
--- a/plane/plane.h
+++ b/plane/plane.h
@@ -15,7 +15,7 @@
     #include <math.h>
 
     #include "lib/header.h"
-    #include "lib/network/udp/client.h"
+    #include "lib/network/udp/server.h"
     #include "lib/network/tcp/client.h"