Update README and add contrib dir

contrib/tsn/model/frer-latent-error-detection-function.h

@@ -0,0 +1,71 @@
+#ifndef FRER_LATENT_ERROR_DETECTION_FUNCTION_H
+#define FRER_LATENT_ERROR_DETECTION_FUNCTION_H
+
+#include "ns3/object.h"
+
+#include "ns3/nstime.h"
+
+#include "frer-base-recovery-function.h"
+
+
+namespace ns3
+{
+
+class LatentErrorDetectionFunction : public Object
+{
+  public:
+    /**
+     * \brief Get the TypeId
+     *
+     * \return The TypeId for this class
+     */
+    static TypeId GetTypeId();
+
+    /**
+     * \brief Create a LatentErrorDetectionFunction
+     */
+    LatentErrorDetectionFunction();
+
+    /**
+     * Destroy a LatentErrorDetectionFunction
+     *
+     * This is the destructor for the LatentErrorDetectionFunction.
+     */
+    ~LatentErrorDetectionFunction();
+
+    // Delete copy constructor and assignment operator to avoid misuse
+    LatentErrorDetectionFunction& operator=(const LatentErrorDetectionFunction&) = delete;
+    LatentErrorDetectionFunction(const LatentErrorDetectionFunction&) = delete;
+
+    void SetRecoveryFunction(Ptr<BaseRecoveryFunction> recoveryFunction);
+    void LatentErrorReset();        //802.1CB-2017 : 7.4.4.3
+    void LatentErrorTest();         //802.1CB-2017 : 7.4.4.4
+
+  protected:
+    Ptr<BaseRecoveryFunction> m_recoveryFunction = nullptr;
+
+    int m_curBaseDifference = 0;                                //802.1CB-2017 : 7.4.4.2.1
+
+    uint m_frerSeqRcvyLatentErrorDifference;                 //802.1CB-2017 : 10.4.1.12.1
+    Time m_frerSeqRcvyLatentErrorPeriod;                       //802.1CB-2017 : 10.4.1.12.2
+    Time m_frerSeqRcvyLatentResetPeriod;                       //802.1CB-2017 : 10.4.1.12.4
+
+    uint m_frerSeqRcvyLatentErrorPaths;                        //802.1CB-2017 : 10.4.1.12.3
+    uint m_frerCpsSeqRcvyLatentErrorResets = 0;                  //802.1CB-2017 : 10.8.10
+
+    Time m_frerSeqRcvyMinLatentErrorPeriod;
+    Time m_frerSeqRcvyMaxLatentErrorPeriod;
+    Time m_frerSeqRcvyMinLatentResetPeriod;
+    Time m_frerSeqRcvyMaxLatentResetPeriod;
+
+    EventId m_testEvent;
+    EventId m_resetEvent;
+
+
+  private:
+
+
+};
+
+}
+#endif /* FRER_LATENT_ERROR_DETECTION_FUNCTION_H */