--- /dev/null
+
+/* Copyright (c) 2012. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#ifndef _MSG_EXAMPLES_ROUTING_H
+#define _MSG_EXAMPLES_ROUTING_H
+#include "xbt/dynar.h"
+#include "msg/msg.h"
+
+#include "common.h"
+
+#include "answer.h"
+#include "routing_table.h"
+/**
+ * Information about a foreign node
+ */
+typedef struct s_node_contact {
+ unsigned int id; //The node identifier
+ unsigned int distance; //The distance from the node
+} s_node_contact_t, *node_contact_t;
+
+/*
+ * Node data
+ */
+typedef struct s_node {
+ unsigned int id; //node id - 160 bits
+ routing_table_t table; //node routing table
+ msg_comm_t receive_comm; //current receiving communication.
+ msg_task_t task_received; //current task being received
+
+ char mailbox[MAILBOX_NAME_SIZE]; //node mailbox
+ unsigned int find_node_success; //Number of find_node which have succeeded.
+ unsigned int find_node_failed; //Number of find_node which have failed.
+
+} s_node_t, *node_t;
+
+// node functions
+node_t node_init(unsigned int id);
+void node_free(node_t node);
+
+void node_routing_table_update(node_t node, unsigned int id);
+answer_t node_find_closest(node_t node, unsigned int destination_id);
+
+
+// identifier functions
+unsigned int get_id_in_prefix(unsigned int id, unsigned int prefix);
+unsigned int get_node_prefix(unsigned int id, unsigned int nb_bits);
+void get_node_mailbox(unsigned int id, char *mailbox);
+
+// node contact functions
+node_contact_t node_contact_new(unsigned int id, unsigned int distance);
+node_contact_t node_contact_copy(node_contact_t node_contact);
+void node_contact_free(node_contact_t contact);
+#endif /* _MSG_EXAMPLES_ROUTING_H */
