--- /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 BITTORRENT_TRACKER_H_
+#define BITTORRENT_TRACKER_H_
+#include <xbt/dynar.h>
+#include "bittorrent.h"
+/**
+ * Tracker main function
+ */
+int tracker(int argc, char *argv[]);
+/**
+ * Task types exchanged between a node and the tracker
+ */
+typedef enum {
+ TRACKER_TASK_QUERY,
+ TRACKER_TASK_ANSWER
+} e_tracker_task_type_t;
+/**
+ * Tasks exchanged between a tracker and peers.
+ */
+typedef struct s_tracker_task_data {
+ e_tracker_task_type_t type; //type of the task
+ const char *mailbox; //mailbox where the tracker should answer
+ const char *issuer_host_name; //hostname, for debug purposes
+ //Query data
+ int peer_id; //peer id
+ int uploaded; //how much the peer has already uploaded
+ int downloaded; //how much the peer has downloaded
+ int left; //how much the peer has left
+ //Answer data
+ int interval; //how often the peer should contact the tracker (unused for now)
+ xbt_dynar_t peers; //the peer list the peer has asked for.
+} s_tracker_task_data_t, *tracker_task_data_t;
+
+tracker_task_data_t tracker_task_data_new(const char *issuer_host_name, const char *mailbox, int peer_id, int uploaded, int downloaded, int left);
+void tracker_task_data_free(tracker_task_data_t task);
+
+int is_in_list(xbt_dynar_t peers, int id);
+#endif /* BITTORRENT_TRACKER_H */
