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Resolved Issue 236: retransmission of DTLSencrypted control packets 4.4.3. Retransmissions The CAPWAP control protocol operates as a reliable transport. For each request message, a response exists, which is used to acknowledge receipt of the request. Further, the control header's sequence number is used to pair the request and response messages (see section Section 4.4.1). Response messages are not explicitly acknowledged, therefore if it was not received, the original request would be retransmitted. Implementations MAY cache response messages in order to be able to respond to a retransmitted request with minimal local processing. Therefore, retransmitted requests MUST NOT be altered by the sender, as it MUST assume that the original request was processed, but the response was lost in the network. Any alterations to the original request MUST have a new sequence number, and is treated as a new request by the receiver. |