Request to support RFC 9177 CoAP Block-Wise Transfer Options Supporting Robust Transmission

[rwrozelle]

Enhancement Request to support RFC 9177 CoAP Block-Wise Transfer Options Supporting Robust Transmission

[chrysn]

RFC9177 has an extremely narrow scope and limitations, as outlined in section 3; in particular, it mostly performs well when the link on which it is used is understood well enough that the default limitations that apply to NON messages (section 7.2).

What is the use case that requires the use of Q-Block over regular block-wise transfer?

[rwrozelle]

I'm testing libcoap client on an both wifi and openthread devices for large file transfer and wanted to see if that would improve performance (or overload the mesh network in the case of openthread). If this is not a roadmap direction, I'll build a libcoap server for testing.

[chrysn]

Thanks, that makes sense. Please let me know of your findings!