Update README and add contrib dir

contrib/tsn/model/psfp-flow-meter-instance.h

@@ -0,0 +1,61 @@
+#ifndef FLOW_METER_INSTANCE_H
+#define FLOW_METER_INSTANCE_H
+
+#include "ns3/object.h"
+#include "ns3/nstime.h"
+#include "ns3/packet.h"
+#include "ns3/data-rate.h"
+
+namespace ns3
+{
+
+
+class FlowMeterInstance: public Object
+{
+  public:
+    /**
+     * \brief Get the TypeId
+     *
+     * \return The TypeId for this class
+     */
+    static TypeId GetTypeId();
+
+    /**
+     * \brief Create a FlowMeterInstance
+     */
+    FlowMeterInstance();
+
+    /**
+     * Destroy a FlowMeterInstance
+     *
+     * This is the destructor for the Tas.
+     */
+    ~FlowMeterInstance();
+
+    // Delete copy constructor and assignment operator to avoid misuse
+    FlowMeterInstance& operator=(const FlowMeterInstance&) = delete;
+    FlowMeterInstance(const FlowMeterInstance&) = delete;
+
+    void updateTokenBuckets();
+
+    bool Test(Ptr<Packet>);
+
+  protected:
+
+  private:
+    DataRate m_cir;
+    uint32_t m_cbs;
+    DataRate m_eir;
+    uint32_t m_ebs;
+    bool m_cf;
+    bool m_dropOnYellow;
+    bool m_markAllFramesRedEnable;
+    bool m_markAllFramesRed;
+
+    Time m_lastTokenUpdateTime;
+    double m_committedToken = 0;
+    double m_excessToken = 0;
+};
+
+}
+#endif /* FLOW_METER_INSTANCE_H */