CoAP Payload-Length Option Extension

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Last updated 2015-06-19 (latest revision 2014-12-16)
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This document defines an extension to the Constrained Application Protocol (CoAP) to add one new option: Payload-Length, which is used to indicate the length of the payload of the message.


Kepeng Li (
Ruinan Sun (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)