add SyncInterestTable, and add "m_" to member variables to conform with
convention
diff --git a/model/sync-interest-table.h b/model/sync-interest-table.h
new file mode 100644
index 0000000..4993cd4
--- /dev/null
+++ b/model/sync-interest-table.h
@@ -0,0 +1,51 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2012 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Zhenkai Zhu <zhenkai@cs.ucla.edu>
+ * 卞超轶 Chaoyi Bian <bcy@pku.edu.cn>
+ * Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#ifndef SYNC_STATE_H
+#define SYNC_STATE_H
+#include <string>
+#include <boost/unordered_map.hpp>
+
+/**
+ * \defgroup sync SYNC protocol
+ *
+ * Implementation of SYNC protocol
+ */
+namespace Sync {
+
+/**
+ * \ingroup sync
+ * @brief A table to keep unanswered Sync Interest
+ */
+class SyncInterestTable
+{
+private:
+ boost::unordered_map<std::string, std::string> m_table;
+public:
+ bool insert(std::string interest);
+ boost::unordered_map<std::string, std::string> fetchAll();
+
+};
+
+} // Sync
+
+#endif // SYNC_STATE_H