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net: lwm2m: Add support for blockwise GET and FETCH #61858

Merged
merged 8 commits into from
Sep 27, 2023
Merged

net: lwm2m: Add support for blockwise GET and FETCH #61858

merged 8 commits into from
Sep 27, 2023

Commits on Sep 21, 2023

  1. net: lwm2m: Allow content formats to support only some data types 

    Partial content format support is required to have a proper support
for content format OPAQUE instead of threading it as a part of
plain text format.

Signed-off-by: Seppo Takalo <[email protected]>
    @SeppoTakalo
    SeppoTakalo committed Sep 21, 2023
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  2. net: lwm2m: Separate opaque content format into its own 

    Opaque content format is not part of clear-text, so it
should be separated into its own file.

Signed-off-by: Seppo Takalo <[email protected]>
    @SeppoTakalo
    SeppoTakalo committed Sep 21, 2023
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  3. net: lwm2m: Only parse block1 option for WRITE operation 

    In reality, single-write is the only operation that handles
BLOCK1 operations when receiving paylod.

Signed-off-by: Seppo Takalo <[email protected]>
    @SeppoTakalo
    SeppoTakalo committed Sep 21, 2023
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  4. net: lwm2m: Remove unneeded function pointer parameter 

    lwm2m_udp_receive() is only called with same function
pointer, so there no need to carry that in the parameter.

Signed-off-by: Seppo Takalo <[email protected]>
    @SeppoTakalo
    SeppoTakalo committed Sep 21, 2023
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  5. net: lwm2m: Refactor blockwise SEND to support GET and FETCH 

    Allow blockwise-send buffers to be used with GET and FETCH
queries as well.
When outgoing packet is split into multiple blocks, don't free
it when first block is send. Keep it in memory until some other requests
come.

Following queries to next block are matched using CoAP token.
However, this required Leshan to use COAP.BLOCKWISE_REUSE_TOKEN=true
option from Californium.

Signed-off-by: Seppo Takalo <[email protected]>
    @SeppoTakalo
    SeppoTakalo committed Sep 21, 2023
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  6. net: lwm2m: Fix composite read on SenML-CBOR 

    Composite read was incorrectly trying to parse CoAP packet
instead of payload of the packet.

Signed-off-by: Seppo Takalo <[email protected]>
    @SeppoTakalo
    SeppoTakalo committed Sep 21, 2023
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  7. net: lwm2m: Append CoAP Etag to protect integrity of blockwise 

    To protect the integrity of outgoing block-wise transfers, append
Etag option that allows client to see if the received block is
generated from same content as it is expecting.

Signed-off-by: Seppo Takalo <[email protected]>
    @SeppoTakalo
    SeppoTakalo committed Sep 21, 2023
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  8. net: lwm2m: Generate new tokens for LwM2M SEND blocks 

    Previously each piece of LwM2M SEND was
using token length of zero. I think this was unintentional.

Signed-off-by: Seppo Takalo <[email protected]>
    @SeppoTakalo
    SeppoTakalo committed Sep 21, 2023
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