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diff --git a/src/stateless/messaging/trex_stateless_messaging.h b/src/stateless/messaging/trex_stateless_messaging.h
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+/*
+ Itay Marom
+ Cisco Systems, Inc.
+*/
+
+/*
+Copyright (c) 2015-2015 Cisco Systems, Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+#ifndef __TREX_STATELESS_MESSAGING_H__
+#define __TREX_STATELESS_MESSAGING_H__
+
+#include <msg_manager.h>
+
+class TrexStatelessDpCore;
+
+/**
+ * defines the base class for CP to DP messages
+ * 
+ * @author imarom (27-Oct-15)
+ */
+class TrexStatelessCpToDpMsgBase {
+public:
+
+    TrexStatelessCpToDpMsgBase() {
+    }
+
+    virtual ~TrexStatelessCpToDpMsgBase() {
+    }
+
+    /**
+     * virtual function to handle a message
+     * 
+     */
+    virtual bool handle(TrexStatelessDpCore *dp_core) = 0;
+};
+
+/**
+ * a message to start traffic
+ * 
+ * @author imarom (27-Oct-15)
+ */
+class TrexStatelessDpStart : public TrexStatelessCpToDpMsgBase {
+public:
+
+    TrexStatelessDpStart(const uint8_t *pkt, uint16_t pkt_len, double pps);
+
+    ~TrexStatelessDpStart();
+
+    const uint8_t * get_pkt() {
+        return m_pkt;
+    }
+
+    uint16_t get_pkt_len() {
+        return m_pkt_len;
+    }
+
+    virtual bool handle(TrexStatelessDpCore *dp_core);
+
+private:
+    uint8_t *m_pkt;
+    uint16_t m_pkt_len;
+    double   m_pps;
+};
+
+/**
+ * a message to stop traffic
+ * 
+ * @author imarom (27-Oct-15)
+ */
+class TrexStatelessDpStop : public TrexStatelessCpToDpMsgBase {
+public:
+    virtual bool handle(TrexStatelessDpCore *dp_core);
+};
+
+
+#endif /* __TREX_STATELESS_MESSAGING_H__ */