1. waitDTLS is not started in the 2.3.1 CAPWAP Proto State Transitions, 
although it is said in CAPWAP/DTLS interface chapter.

2. Join REQ need to be send at here.

   DTLS Connect to Join (d):  This transition occurs when the DTLS
      Session is successfully established.

      WTP:  This state transition occurs when the WTP receives the
         DTLSEstablished notification (see Section 2.3.2.2), indicating
         that the DTLS session was successfully established.  When this
         notification is received, the FailedDTLSSessionCount counter is
         set to zero.

3.
Data Check to DTLS Teardown (n):  This transition occurs when the WTP
      does not complete the Data Check exchange.

      WTP:  This state transition occurs if the WTP does not receive the
         Change State Event Response message before a CAPWAP
         transmission timeout occurs.

    Does the above need to be change to something like  RetransmitCount
  counter has reached the MaxRetransmit variable? Since we do not use 
transmission timeout timer.

4.   Run to Run (q): AC

Clear Config Response:  The AC receives a Clear Configuration
            Response message from the WTP (see Section 8.9).

Need to add Clear Configuration REQ send.

5. Run to DTLS Teardown (p) maybe need to add echo failure case.

         "transitions to this state if the underlying reliable
         transport's RetransmitCount counter has reached the
         MaxRetransmit variable (see Section 4.7)."

This can cover WTP, but not AC.