Update README and add contrib dir

contrib/tsn/model/frer-match-recovery-function.h

@@ -0,0 +1,47 @@
+#ifndef FRER_MATCH_RECOVERY_FUNCTION_H
+#define FRER_MATCH_RECOVERY_FUNCTION_H
+
+#include "ns3/frer-base-recovery-function.h"
+
+
+namespace ns3
+{
+
+class MatchRecoveryFunction : public BaseRecoveryFunction
+{
+  public:
+    /**
+     * \brief Get the TypeId
+     *
+     * \return The TypeId for this class
+     */
+    static TypeId GetTypeId();
+
+    /**
+     * \brief Create a MatchRecoveryFunction
+     */
+    MatchRecoveryFunction();
+
+    /**
+     * Destroy a MatchRecoveryFunction
+     *
+     * This is the destructor for the MatchRecoveryFunction.
+     */
+    ~MatchRecoveryFunction();
+
+    // Delete copy constructor and assignment operator to avoid misuse
+    MatchRecoveryFunction& operator=(const MatchRecoveryFunction&) = delete;
+    MatchRecoveryFunction(const MatchRecoveryFunction&) = delete;
+
+    bool DoRecovery(uint16_t seqNumber) override;
+
+  protected:
+
+
+  private:
+
+
+};
+
+}
+#endif /* FRER_MATCH_RECOVERY_FUNCTION_H */