Dump a COAP message to a string.

DumpHeader dumps the basic COAP message details to a string.

DumpPayload dumps the COAP message payload to a string.

NoCodec performes no encoding/decoding but it propagates/validates the CoAP content format/media type.

RawVNDOCFCBORCodec performes no encoding/decoding but it propagates/validates the CoAP content format/media type.

VNDOCFCBORCodec encodes/decodes according to the CoAP content format/media type.