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Resolved Issue 236: retransmission of DTLSencrypted control packets After transmitting a request message, the RetransmitInterval (see section Section 4.6) timer and MaxRetransmit (see section Section 4.7) variable are used in order to determine whether the original request needs to be retransmitted. Response messages are not subjected to these timers. When a request is retransmitted, it MUST be re-encrypted via the DTLS stack. The reason being that if the peer had received the request, but the corresponding response had been lost, it is necessary to ensure that retransmitted requests are not identified as replays by the DTLS stack. Similarly, any cached responses that are retransmitted as a result of receiving a previously received request MUST be re-encrypted via DTLS. Duplicate response, identified by the Sequence Number field in the CAPWAP control message header, SHOULD be discarded upon receipt. |